Optical film with touch function

This application claims the priority benefits of U.S. provisional application Ser. No. 62/150,859, filed on Apr. 22, 2015 and Taiwan application serial no. 104136458, filed on Nov. 5, 2015. The entirety of each of the above-mentioned patent applications is hereby incorporated by reference herein and made a part of this specification.

The technical field relates to an optical film with touch function.

In recent years, with the rapid development of various applications such as information technology, wireless mobile communications, and information appliances, to achieve the objects of greater convenience, lighter weight, and better usability, the input device of many information products has been converted from a traditional keyboard or mouse, etc. to a touch display panel. Touch input techniques include, for instance, a capacitive touch technique, a resistive touch technique, and an optical touch technique. In the case of the capacitive touch technique, in general, electrodes providing driving voltage and electrodes sensing electrical properties are disposed in a dispersed manner. By sensing the capacitance change between the electrodes providing driving voltage and the electrodes sensing electrical properties, touch input techniques can be achieved.

In general, to achieve both display function and touch function, the electrodes providing driving voltage and the electrodes sensing electrical properties can be formed by a conductive film having light-transmittance properties, such as an indium-tin-oxide (ITO) conductive film, or be formed via a trace method by using a metal wire. However, the costs of a conductive film with light-transmittance properties are very high. Moreover, the desired electrodes are formed by winding metal wires via a specific trace method, and although tough sensing can be achieved, the metal wire is exposed on the display panel, thus affecting light uniformity and panel visibility of the display panel.

An optical film with touch function in an embodiment of the disclosure includes a substrate, a material layer, a plurality of columnar structures, and a filter electrode layer. The substrate has a carrying surface. The material layer is disposed on the carrying surface of the substrate. The columnar structures are disposed in the material layer. Each of the columnar structures is extended from a side of the material layer adjacent to the carrying surface to a side of the material layer away from the carrying surface. A side of each of the columnar structures adjacent to the substrate has a first end surface. The filter electrode layer is disposed between the substrate and the material layer. The filter electrode layer includes a plurality of sensing electrode regions electrically insulated from each other. The filter electrode layer has a plurality of openings, and the openings respectively expose the first end surfaces.

Several exemplary embodiments accompanied with figures are described in detail below to further describe the disclosure in details.

The accompanying drawings are included to provide further understanding, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments and, together with the description, serve to explain the principles of the disclosure.

FIG. 1A is a top view of an optical film with touch function of an embodiment of the disclosure.

FIG. 1B is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 1A along line I-I.

FIG. 1C is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 1A along line II-II.

FIG. 1D is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 1A along line III-III.

FIG. 2A is a top view of an optical film with touch function of another embodiment of the disclosure.

FIG. 2B is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 2A along line I-I.

FIG. 2C is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 2A along line II-II.

FIG. 2D is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 2A along line III-III.

FIG. 3A is a top view of an optical film with touch function of yet another embodiment of the disclosure.

FIG. 3B is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 3A along line I-I.

FIG. 3C is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 3A along line II-II.

FIG. 3D is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 3A along line III-III.

FIG. 4A is a top view of an optical film with touch function of still yet another embodiment of the disclosure.

FIG. 4B is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 4A along line I-I.

FIG. 4C is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 4A along line II-II.

FIG. 4D is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 4A along line III-III.

FIG. 5A is a top view of an optical film with touch function of still yet another embodiment of the disclosure.

FIG. 5B is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 5A along line I-I.

FIG. 5C is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 5A along line II-II.

FIG. 5D is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 5A along line III-III.

FIG. 6A is a top view of an optical film with touch function of still yet another embodiment of the disclosure.

FIG. 6B is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 6A along line I-I.

FIG. 6C is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 6A along line II-II.

FIG. 6D is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 6A along line III-III.

FIG. 7A is a top view of an optical film with touch function of still yet another embodiment of the disclosure.

FIG. 7B is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 7A along line I-I.

FIG. 7C is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 7A along line II-II.

FIG. 7D is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 7A along line III-III.

FIG. 8A is a top view of an optical film with touch function of still yet another embodiment of the disclosure.

FIG. 8B is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 8A along line I-I.

FIG. 8C is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 8A along line II-II.

FIG. 8D is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 8A along line III-III.

FIG. 1A is a top view of an optical film with touch function of an embodiment of the disclosure. Please refer to FIG. 1A . Specifically, to clearly express each of the components in the optical film with touch function, an optical film 100 with touch function shown in FIG. 1A is only a portion of a complete optical film with touch function. In the present embodiment, relevant descriptions of the optical film 100 with touch function represent relevant descriptions of the complete optical film with touch function.

In the present embodiment, the optical film 100 with touch function includes a first electrode region 162 , a second electrode region 164 , and a third electrode region 166 . The first electrode region 162 includes first sub-electrode regions 162 A and 162 B. The third electrode region 166 includes third sub-electrode regions 166 A and 166 B. The third sub-electrode region 166 A is disposed between the second electrode region 164 and the first sub-electrode region 162 A, and the third sub-electrode region 166 B is disposed between the second electrode region 164 and the first sub-electrode region 162 B. In the present embodiment, line I-I passes through the first sub-electrode region 162 A, the third sub-electrode region 166 A, and the second electrode region 164 . Line II-II passes through the first sub-electrode region 162 A, the third sub-electrode region 166 A, and the second electrode region 164 . Line III-III passes through the first sub-electrode region 162 A, the third sub-electrode region 166 A, the second electrode region 164 , the third sub-electrode region 166 B, and the first sub-electrode region 162 B. In the present embodiment, line I-I, line II-II, and line III-III are used as cutting lines for describing internal components of the optical film 100 with touch function in different regions thereof. Line I-I, line II-II, and line III-III of the present embodiment are not used to limit the disclosure.

FIG. 1B is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 1A along line I-I. Please refer to FIG. 1B . In the present embodiment, the optical film 100 with touch function includes a substrate 110 , a material layer 120 , a plurality of columnar structures 130 , and a filter electrode layer. The filter electrode layer of the present embodiment includes a filter layer 140 and a reflective layer 150 . The substrate 110 has a carrying surface CS. The material layer 120 is disposed on the carrying surface CS. The filter layer 140 is disposed between the substrate 110 and the material layer 120 , and the reflective layer 150 is disposed between the filter layer 140 and the material layer 120 . In the present embodiment, the optical film 100 with touch function is suitable to be disposed on a display device (not shown). The display device (not shown) is suitable to be disposed on the surface of a side of the material layer 120 away from the carrying surface CS. The display image beam of the display device enters the optical film 100 with touch function from the surface of a side of the material layer 120 away from the carrying surface CS, and is emitted from another surface of the substrate 110 opposite to the carrying surface CS. In the present embodiment, the display device can be, for instance, a liquid crystal display (LCD), a plasma display, an organic light-emitting diode (OLED) display, an electrowetting display (EWD), an electro-phoretic display (EPD), an electrochromic display (ECD), or other suitable display devices, and the disclosure is not limited thereto.

In the present embodiment, the material of the substrate 110 is a light-transmitting material. The material of the substrate 110 is, for instance, polyimide (PI), polycarbonate (PC), polyethersulfone (PES), polyacrylate (PA), polynorbornene (PNB), polyethylene terephthalate (PET), polyetheretherketone (PEEK), polyethylene naphthalate (PEN), polyetherimide (PEI), glass, or other light-transmitting materials, and the disclosure is not limited thereto.

Please refer further to FIG. 1B . In the present embodiment, the columnar structures 130 are disposed in the material layer 120 . Each of the columnar structures 130 is extended from a side of the material layer 120 adjacent to the carrying surface CS to a side of the material layer 120 away from the carrying surface CS. A side of each of the columnar structures 130 adjacent to the substrate 110 has a first end surface S 1 , and a side of each of the columnar structures 130 away from the substrate 110 has a second end surface S 2 . In the present embodiment, the first end surface S 1 and the surface of a side of the material layer 120 adjacent to the carrying surface CS are coplanar, and the second end surface S 2 and the surface of a side of the material layer 120 away from the carrying surface CS are coplanar. However, in some embodiments, the first end surface S 1 and the second end surface S 2 can respectively protrude beyond the surface of a side of the material layer 120 adjacent to the carrying surface CS and the surface of a side of the material layer 120 away from the carrying surface CS, or the first end surface S 1 and the second end surface S 2 can be surfaces respectively recessed at a side of the material layer 120 adjacent to the carrying surface CS and a side of the material layer 120 away from the carrying surface CS, and the disclosure is not limited thereto.

In the present embodiment, the materials of the material layer 120 and the columnar structures 130 are light-transmitting materials. The material layer 120 and the columnar structures 130 can be formed by, for instance, a polymer, a resin, a photosensitive resin, a positive photoresist, or a negative photoresist, and the disclosure is not limited thereto. Moreover, in the present embodiment, the index of refraction of the material of the columnar structures 130 is greater than the index of refraction of the material of the material layer 120 . The index of refraction of the material of the columnar structures 130 can range from 1.3 to 3.0, preferably from 1.5 to 2.5 in a wavelength range of 380 nm to 780 nm, and the index of refraction of the material layer 120 ranges from 1.0 to 2.7, preferably from 1.2 to 2.2 in a wavelength range of 380 nm to 780 nm. In the present embodiment, the display image beam of the display device (not shown) enters the columnar structures 130 from the second end surface S 2 of the columnar structures 130 and is reflected on the junction between the columnar structures 130 and the material layer 120 . The display image beam is reflected on the junction between the columnar structures 130 and the material layer 120 and transmitted in the columnar structures 130 , and is emitted at the first end surface S 1 of the columnar structures 130 . In the present embodiment, the columnar structures 130 are prism structures or cylindrical structures. The columnar structures 130 can be, for instance, elliptical columns, square columns, rectangular columns, or rhombic columns. In some embodiments, the columnar structures 130 can also be irregular columns, and the disclosure does not limit the column shape of the columnar structures 130 .

In the present embodiment, the area of the second end surface S 2 of the columnar structures 130 is less than the display pixels of the display device (not shown) disposed corresponding to the optical film 100 with touch function. Therefore, when a display unit and the optical film 100 with touch function are assembled, a process of precise alignment can be omitted. However, in some embodiments, the area of the second end surface S 2 can also be equal to the area of each of the pixels to achieve greater light use efficiency, and the disclosure is not limited thereto.

Moreover, in the present embodiment, the area of the second end surface S 2 is greater than or equal to the area of the first end surface S 1 . The ratio of the area of the first end surface S 1 to the area of the second end surface S 2 is greater than or equal to 0.5, and less than or equal to 1. However, in some embodiments, the area of the first end surface S 1 can also be greater than or equal to the area of the second end surface S 2 , and the ratio of the area of the second end surface S 2 to the area of the first end surface S 1 is greater than or equal to 0.5, and less than or equal to 1. The columnar structures 130 of the area ratio of the first end surface S 1 and the second end surface S 2 can be formed according to different light guide requirements, and the disclosure is not limited thereto.

Please refer further to FIG. 1B . In the present embodiment, the filter layer 140 of the optical film with touch function includes a first filter region 142 , a second filter region 144 , and a third filter region 146 . The reflective layer 150 includes a first reflective region 152 , a second reflective region 154 , and a third reflective region 156 . A vertical projection of the first reflective region 152 on the carrying surface CS falls within the range of a vertical projection of the first filter region 142 on the carrying surface CS. A vertical projection of the second reflective region 154 on the carrying surface CS falls within the range of a vertical projection of the second filter region 144 on the carrying surface CS. Moreover, a vertical projection of the third reflective region 156 on the carrying surface CS falls within the range of a vertical projection of the third filter region 146 on the carrying surface CS.

FIG. 1D is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 1A along line III-III. Please refer to both FIG. 1A and FIG. 1D . In the present embodiment, the first filter region 142 includes a plurality of first sub-filter regions 142 A and 142 B. The first sub-filter regions 142 A and 142 B are separated from each other. The second filter region 144 is disposed between two adjacent first sub-filter regions 142 A and 142 B. The first reflective region 152 in a direction from the first sub-filter regions 142 A and perpendicular to the carrying surface CS is defined as a first sub-reflective region 152 A, and the first reflective region 152 in a direction from the first sub-filter regions 142 B and perpendicular to the carrying surface CS is defined as a first sub-reflective region 152 B. Moreover, in the present embodiment, the third filter region 146 includes a plurality of third sub-filter regions 146 A and 146 B. The third sub-filter region 146 A are disposed between the first sub-filter regions 142 A and the second filter region 144 , and the third sub-filter regions 146 B are disposed between the first sub-filter regions 142 B and the second filter region 144 . The third reflective region 156 in a direction from the third sub-filter region 146 A and perpendicular to the carrying surface CS is defined as a third sub-reflective region 156 A, and the third reflective region 156 in a direction from the third sub-filter region 146 B and perpendicular to the carrying surface CS is defined as a third sub-reflective region 156 B.

In the present embodiment, the first sub-electrode region 162 A shown in FIG. 1A includes the first sub-reflective region 152 A, and the first sub-electrode region 162 B includes the first sub-reflective region 152 B. Moreover, the second electrode region 164 includes the second reflective region 154 . Moreover, the third sub-electrode region 166 A includes the third sub-reflective region 156 A, and the third sub-electrode region 166 B includes the third sub-reflective region 156 B.

FIG. 1C is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 1A along line II-II. Please refer to FIG. 1B , FIG. 1C , and FIG. 1D . In the present embodiment, the optical film 100 with touch function further includes an insulating layer 170 and a connecting layer 180 (as shown in FIG. 1D ). The insulating layer 170 is disposed between the reflective layer 150 and the material layer 120 . The insulating layer 170 is at least disposed between the first sub-reflective region 152 A and the material layer 120 , between the first sub-reflective region 152 B and the material layer 120 , between the second reflective region 154 and the material layer 120 , between the third sub-reflective region 156 A and the material layer 120 , and between the third sub-reflective region 156 B and the material layer 120 . Moreover, the insulating layer 170 connects the first sub-reflective region 152 A and the second reflective region 154 , and connects the first sub-reflective region 152 B and the second reflective region 154 . In the present embodiment, the insulating layer 170 is not electrically conductive. Therefore, the first sub-reflective region 152 A and the second reflective region 154 cannot achieve electrical connection via the insulating layer 170 , and the first sub-reflective region 152 B and the second reflective region 154 cannot achieve electrical connection via the insulating layer 170 . The material of the insulating layer 170 of the present embodiment is, for instance, a light-transmitting material which is electrically insulating, and the material of the reflective layer 150 is a conductive material capable of reflecting light, such as a metal. In the present embodiment, a portion of the display image beams of the display device (not shown) cannot be transmitted in the columnar structures 130 and emitted at the first end surfaces S 1 . The display image beams are, for instance, emitted from the surface of a side of the material layer 120 adjacent to the carrying surface CS. The reflective layer 150 can reflect the display image beams such that the display image beams have a chance to enter the columnar structures 130 and be emitted from the first end surfaces S 1 . As a result, the light extraction efficiency of the optical film 100 with touch function is good.

Moreover, in the present embodiment, the connecting layer 180 is disposed between the insulating layer 170 and the material layer 120 . The connecting layer 180 connects the first sub-reflective region 152 A and the first sub-reflective region 152 B. The connecting layer 180 is electrically conductive. Therefore, the first sub-reflective region 152 A and the first sub-reflective region 152 B can achieve electrical connection via the connecting layer 180 . In the present embodiment, the reflective layer of the optical film 100 with touch function forms a plurality of sensing electrode regions, and the sensing electrode regions are electrically insulated from one another. The first reflective region 152 is defined as a sensing electrode region and the second reflective region 154 is defined as another sensing electrode region. The sensing electrode region defined by the first reflective region 152 (first sub-reflective regions 152 A and 152 B) corresponding to the first electrode region 162 (first sub-electrode regions 162 A and 162 B) is used as one of the driving electrode and the sensing electrode in capacitive touch, and the sensing electrode region defined by the second reflective region 154 corresponding to the second electrode region 164 is used as the other one of the driving electrode and the sensing electrode in capacitive touch.

In the present embodiment, when the user touches, for instance, another side surface of the substrate 110 opposite to the carrying surface CS using a finger, capacitance change occurs between the first reflective region 152 and the second reflective region 154 closer to the finger of the user. By sensing the capacitance change between the first reflective region 152 and the second reflective region 154 , the location of the finger of the user on the optical film 100 with touch function can be known.

Moreover, in the present embodiment, the third reflective region 156 (third sub-reflective regions 156 A and 156 B) corresponding to the third electrode region 166 (third sub-electrode regions 166 A and 166 B) is used as a dummy electrode disposed between the driving electrode and the sensing electrode. In the present embodiment, the first sub-reflective region 152 A does not become electrically connected to the second reflective region 154 via the third sub-reflective region 156 A, and the first sub-reflective region 152 B does not become electrically connected to the second reflective region 154 via the third sub-reflective region 156 B.

In the present embodiment, the gap G 1 exists between the third sub-reflective region 156 A and the first sub-reflective region 152 A, and the gap G 2 exists between the third sub-reflective region 156 A and the second reflective region 154 . Moreover, the gap G 3 exists between the third sub-reflective region 156 B and the second reflective region 152 , and the gap G 4 exists between the third sub-reflective region 156 B and the first sub-reflective region 152 B. In the present embodiment, the third reflective region 156 is not electrically connected to the first reflective region 152 , and is also not electrically connected to the second reflective region 154 . Moreover, the third reflective region 156 does not have touch sensing function. Since the optical film 100 with touch function includes the third reflective region 156 , the light extraction efficiency of a portion of the optical film 100 with touch function corresponding to the location of the third reflective region 156 is good, and the effect thereof is similar to the locations of the first reflective region 152 and the second reflective region 154 , such that the overall light extraction efficiency of the optical film 100 with touch function is good and light uniformity thereof is good.

In the present embodiment, the first electrode region 162 of the optical film 100 with touch function includes two first sub-electrode regions 162 A and 162 B, and the third electrode region 166 includes two third sub-electrode regions 166 A and 166 B. However, in some embodiments, the first electrode region of the optical film with touch function can also include more than two first sub-electrode regions, and the third electrode region can also include more than two third sub-electrode regions. Moreover, the second electrode region 164 can also include a plurality of second sub-electrode regions. In these embodiments, the first sub-electrode regions in the first electrode region are electrically connected to one another, and the second sub-electrode regions in the second electrode region are electrically connected to one another. Moreover, the first sub-electrode regions in the first electrode region are electrically insulated from the second sub-electrode regions in the second electrode region. The disclosure does not limit the quantity of the first sub-electrode regions, the second sub-electrode regions, and the third sub-electrode regions.

Please refer further to FIG. 1B , FIG. 1C , and FIG. 1D . In the present embodiment, the optical film 100 with touch function further includes a planar layer 190 . The planar layer 190 is disposed between the connecting layer 180 and the material layer 120 , and disposed between the insulating layer 170 and the material layer 120 . The planar layer 190 covers the connecting layer 180 and the insulating layer 170 , and provides a planar surface to form the material layer 120 and the columnar structures 130 . In the present embodiment, the material of the planar layer 190 is a light-transmitting coating material or other types of light-transmitting materials. However, in other embodiments, the material of the planar layer can also be a material pervious to a portion of a wavelength range of light or a photoresist material, and the disclosure is not limited thereto.

In the present embodiment, a vertical projection of the first sub-reflective region 152 A on the carrying surface CS falls within the range of a vertical projection of the first sub-filter region 142 A on the carrying surface CS, and a vertical projection of the first sub-reflective region 152 B on the carrying surface CS falls within the range of a vertical projection of the first sub-filter region 142 B on the carrying surface CS. Moreover, a vertical projection of the second reflective region 154 falls within the range of a vertical projection of the second filter region 144 on the carrying surface CS. Moreover, a vertical projection of the third sub-reflective region 156 A on the carrying surface CS falls within the range of a vertical projection of the third sub-filter region 146 A on the carrying surface CS, and a vertical projection of the third sub-reflective region 156 B on the carrying surface CS falls within the range of a vertical projection of the third sub-filter region 146 B on the carrying surface CS. The areas of the first sub-reflective region 152 A, the first sub-reflective region 152 B, the second reflective region 154 , the third sub-reflective region 156 A, and the third sub-reflective region 156 B are respectively less than or equal to the first sub-filter region 142 A, the first sub-filter region 142 B, the second filter region 144 , the third sub-filter region 146 A, and the third sub-filter region 146 B. Moreover, the first sub-reflective region 152 A, the first sub-reflective region 152 B, the second reflective region 154 , the third sub-reflective region 156 A, and the third sub-reflective region 156 B are respectively covered by the first sub-filter region 142 A, the first sub-filter region 142 B, the second filter region 144 , the third sub-filter region 146 A, and the third sub-filter region 146 B.

Please refer to all of FIG. 1A , FIG. 1B , and FIG. 1D . In the present embodiment, the filter electrode layer has a plurality of openings. The filter layer 140 has a plurality of first openings 148 , and the reflective layer 150 has a plurality of second openings 158 . Each of the first openings 148 is connected to one of the second openings 158 to form an opening of the filter electrode layer of the present embodiment. In the present embodiment, the first sub-filter region 142 A, the first sub-filter region 142 B, the second filter region 144 , the third sub-filter region 146 A, and the third sub-filter region 146 B have a plurality of first openings 148 , and the first sub-reflective region 152 A, the first sub-reflective region 152 B, the second reflective region 154 , the third sub-reflective region 156 A, and the third sub-reflective region 156 B have a plurality of second openings 158 . Each of the first openings 148 is connected to one of the second openings 158 . In the present embodiment, the openings of the filter electrode layer respectively expose the first end surfaces S 1 of the columnar structures 130 . A vertical projection of the first openings 148 on the carrying surface CS is overlapped with a vertical projection of the first end surfaces S 1 of the columnar structures 130 on the carrying surface CS. Each of the columnar structures 130 is aligned with one of the first openings 148 , and is also aligned with one of the second openings 158 , and the area of the first openings 148 is equal to the area of the first end surfaces S 1 of the columnar structures 130 . However, in some embodiments, the area of the first openings 148 can be greater than or less than the area of the first end surfaces S 1 of the columnar structures 130 . Moreover, the insulating layer 170 of the optical film 100 with touch function of the present embodiment is placed in the first openings 148 and the second openings 158 . However, in some embodiments, the insulating layer 170 can also not be disposed in the first openings 148 and the second openings 158 , or the insulating layer 170 can also be disposed in a portion of the first openings 148 or a portion of the second openings 158 , and the disclosure is not limited thereto.

In the present embodiment, the filter layer 140 is not electrically conductive, and the reflective layer 150 is electrically conductive. The first sub-filter regions 142 A and 142 B are connected to the second filter region 144 . The third sub-filter regions 146 A and 146 B are connected to the first sub-filter regions 142 A and 142 B, and the third sub-filter regions 146 A and 146 B are also connected to the second filter region 144 . In the present embodiment, the first sub-filter regions 142 A and 142 B, the second filter region 144 , and the third sub-filter regions 146 A and 146 B in the filter layer 14 are integrally connected. However, in some embodiments, the first sub-filter regions 142 A and 142 B, the second filter region 144 , and the third sub-filter regions 146 A and 146 B can also not be connected to one another or only portions thereof are connected to one another, and the disclosure is not limited thereto. Moreover, in the present embodiment, the filter layer 140 includes a black photoresist or a multilayer film filter layer suitable for absorbing visible light. However, in some embodiments, the filter layer can also include a single-layer film or a multilayer film suitable for absorbing light of a specific wavelength according to different needs, and the disclosure is not limited thereto. In the present embodiment, the display image beams of the display device (not shown) are transmitted in the columnar structures 130 , and pass through the second openings 158 and the first openings 148 after being emitted from the first end surfaces S 1 of the columnar structures 130 , and are emitted from another surface of the substrate 110 opposite to the carrying surface CS. When the user views the optical film 100 with touch function at another side of the substrate 110 opposite to the carrying surface CS, the user can see the image frame via the plurality of first openings 148 and the plurality of second openings 158 . In the present embodiment, since a portion of ambient light irradiated to the optical film 100 with touch function is absorbed by the filter layer 140 , a small portion of the ambient light irradiated to the optical film 100 is transmitted to the eye of the user via the reflection of the optical film 100 . Therefore, even if the display device is placed in an environment with high ambient light brightness, the user can still see the display image beams having high visual contrast via the optical film 100 with touch function.

Moreover, in the present embodiment, the filter electrode layer includes a plurality of sensing electrode regions, and the sensing electrode regions are electrically insulated from one another. The filter electrode layer has a plurality of openings, and the openings respectively expose the first end surfaces S 1 . A vertical projection of the first reflective region 152 on the carrying surface CS falls within the range of a vertical projection of the first filter region 142 on the carrying surface CS, and a vertical projection of the second reflective region 154 on the carrying surface CS falls within the range of a vertical projection of the second filter region 144 on the carrying surface CS. Moreover, a vertical projection of the third reflective region 156 on the carrying surface CS falls within the range of a vertical projection of the third filter region 146 on the carrying surface CS. In other words, the first sub-reflective region 152 A, the first sub-reflective region 152 B, the second reflective region 154 , the third sub-reflective region 156 A, and the third sub-reflective region 156 B are respectively covered by the first sub-filter region 142 A, the first sub-filter region 142 B, the second filter region 144 , the third sub-filter region 146 A, and the third sub-filter region 146 B. In the present embodiment, when the user views the optical film 100 with touch function from another side of the substrate 110 opposite to the carrying surface CS, the user at least does not see the first sub-reflective region 152 A, the first sub-reflective region 152 B, the second reflective region 154 , the third sub-reflective region 156 A, and the third sub-reflective region 156 B. When the user sees the image frame via the plurality of first openings 148 and the plurality of second openings 158 , the user does not see the reflective layer 150 . Therefore, the reflective layer 150 does not compromise the light uniformity of the optical film 100 with touch function, such that the light uniformity of the optical film 100 with touch function is good. Moreover, since the reflective layer 150 is covered by the filter layer 140 , the reflective layer 150 does not need to be formed by a conductive film having light transmittance, and an opaque metal wire can be used, or an opaque metal layer can be used, such that the costs of the optical film 100 with touch function are lower. Moreover, the width of the reflective layer 150 can be maximized in the range covered by the filter layer 140 to provide better electrical performance to the optical film 100 with touch function. In other words, the electrical performance thereof can be increased without affecting the light uniformity of the optical film 100 with touch function.

FIG. 2A is a top view of an optical film with touch function of another embodiment of the disclosure, FIG. 2B is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 2A along line I-I, FIG. 2C is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 2A along line II-II, and FIG. 2D is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 2A along line III-III. Please refer to all of FIG. 2A to FIG. 2D . In the present embodiment, an optical film 200 with touch function is similar to the optical film 100 with touch function of the embodiment of FIG. 1A . The components and relevant descriptions of the optical film 200 with touch function are as presented for the relevant descriptions of the optical film 100 with touch function, and are therefore not repeated herein. The difference between the optical film 200 with touch function and the optical film 100 with touch function is that, a filter layer 240 and the reflective layer 150 in the optical film 200 with touch function are electrically conductive. The filter layer 240 includes a first filter region 242 (first sub-filter regions 242 A and 242 B), a second filter region 244 , and a third filter region 246 (third sub-filter regions 246 A and 246 B).

In the present embodiment, the first electrode region 262 includes first sub-electrode regions 262 A and 262 B, and the third electrode region 266 includes third sub-electrode regions 266 A and 266 B. The first sub-electrode region 262 A includes the first sub-filter region 242 A and the first sub-reflective region 152 A, the first sub-electrode region 262 B includes the first sub-filter region 242 B and the first sub-reflective region 152 B, the second electrode region 264 includes the second filter region 244 and the second reflective region 154 , the third sub-electrode region 266 A includes the third sub-filter region 246 A and the third sub-reflective region 156 A, and the third sub-electrode region 266 B includes the third sub-filter region 246 B and the third sub-reflective region 156 B.

In the present embodiment, the filter electrode layer includes a plurality of sensing electrode regions, and the sensing electrode regions are electrically insulated from one another. The first filter region 242 and the first reflective region 152 are defined as a sensing electrode region, and the second filter region 244 and the second reflective region 154 are defined as another sensing electrode region. The sensing electrode region defined by the first filter region 242 (first sub-filter regions 242 A and 242 B) and the first reflective region 152 (first sub-reflective regions 152 A and 152 B) is used as one of the driving electrode and the sensing electrode in capacitive touch, and the sensing electrode region defined by the second filter region 244 and the second reflective region 154 is used as the other one of the driving electrode and the sensing electrode in capacitive touch. Moreover, the third filter region 246 (third sub-filter regions 246 A and 246 B) and the third reflective region 156 (third sub-reflective regions 156 A and 156 B) are used as dummy electrodes disposed between the driving electrode and the sensing electrode. In the present embodiment, the gap G 1 exists between the third sub-reflective region 156 A and the first sub-reflective region 152 A, and a gap G 1 ′ exists between the third sub-filter region 246 A and the first sub-filter region 242 A. The gap G 2 exists between the third sub-reflective region 156 A and the second reflective region 154 , and a gap G 2 ′ exists between the third sub-filter region 246 A and the second filter region 244 . Moreover, the gap G 3 exists between the third sub-reflective region 156 B and the second reflective region 154 , and a gap G 3 ′ exists between the third sub-filter region 246 B and the second filter region 244 . Moreover, the gap G 4 exists between the third sub-reflective region 156 B and the first sub-reflective region 152 B, and a gap G 4 ′ exists between the third sub-filter region 246 B and the first sub-filter region 242 B. In the present embodiment, the first sub-reflective region 152 A does not become electrically connected to the second reflective region 154 via the third sub-reflective region 156 A or the filter layer 240 , and the first sub-reflective region 152 B does not become electrically connected to the second reflective region 154 via the third sub-reflective region 156 B or the filter layer 240 .

In the present embodiment, the filter electrode layer includes a plurality of sensing electrode regions, and the sensing electrode regions are electrically insulated from one another. The filter electrode layer has a plurality of openings, and the openings respectively expose the first end surfaces S 1 . A vertical projection of the first reflective region 152 on the carrying surface CS falls within the range of a vertical projection of the first filter region 242 on the carrying surface CS, and a vertical projection of the second reflective region 154 on the carrying surface CS falls within the range of a vertical projection of the second filter region 244 on the carrying surface CS. Moreover, a vertical projection of the third reflective region 156 on the carrying surface CS falls within the range of a vertical projection of the third filter region 246 on the carrying surface CS. When the user views the optical film 200 with touch function from another side of the substrate 110 opposite to the carrying surface CS, the user at least does not see the first sub-reflective region 152 A, the first sub-reflective region 152 B, the second reflective region 154 , the third sub-reflective region 156 A, and the third sub-reflective region 156 B. When the user sees the image frame via the plurality of first openings 148 and the plurality of second openings 158 , the user does not see the reflective layer 150 . Therefore, the reflective layer 150 does not compromise the light uniformity of the optical film 200 with touch function, such that the light uniformity of the optical film 200 with touch function of the present embodiment is good and costs are lower, as is the case of the optical film 100 with touch function of the embodiment of FIG. 1A . Moreover, the electrical performance of the optical film 200 with touch function can be increased without affecting light uniformity.

FIG. 3A is a top view of an optical film with touch function of yet another embodiment of the disclosure, FIG. 3B is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 3A along line I-I, FIG. 3C is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 3A along line II-II, and FIG. 3D is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 3A along line III-III. Please refer to all of FIG. 3A to FIG. 3D . In the present embodiment, an optical film 300 with touch function is similar to the optical film 100 with touch function of the embodiment of FIG. 1A . The components and relevant descriptions of the optical film 300 with touch function are as presented for the relevant descriptions of the optical film 100 with touch function, and are therefore not repeated herein. The difference between the optical film 300 with touch function and the optical film 100 with touch function is that, a connecting layer 380 of the optical film 300 with touch function has a plurality of third openings 382 (as shown in FIG. 3D ). Each of the third openings 382 is connected to one of the first openings 148 to form an opening of the filter electrode layer of the present embodiment. In the present embodiment, a vertical projection of the first openings 148 connected to the third openings 382 on the carrying surface CS falls within the range of a vertical projection of the third openings 382 on the carrying surface CS. Each of the third openings 382 is aligned with one of the first openings 148 , and is also aligned with one of the second openings 158 , and the area of the first openings 148 is equal to the area of the third opening 382 . However, in some embodiments, the area of the first openings 148 can be greater than or less than the area of the third openings 382 , and the disclosure is not limited thereto.

In the present embodiment, the filter layer 340 in the optical film 300 with touch function is not electrically conductive, and the reflective layer 150 is electrically conductive. The filter layer 340 includes a first filter region 342 (first sub-filter regions 342 A and 342 B), a second filter region 344 , and a third filter region 346 (third sub-filter regions 346 A and 346 B).

In the present embodiment, the first electrode region 362 includes first sub-electrode regions 362 A and 362 B, and the third electrode region 366 includes third sub-electrode regions 366 A and 366 B. The first sub-electrode region 362 A includes the first sub-reflective region 152 A, the first sub-electrode region 362 B includes the first sub-reflective region 152 B, the second electrode region 364 includes the second reflective region 154 , the third sub-electrode region 366 A includes the third sub-reflective region 156 A, and the third sub-electrode region 366 B includes the third sub-reflective region 156 B.

In the present embodiment, the filter electrode layer includes a plurality of sensing electrode regions, and the sensing electrode regions are electrically insulated from one another. The first reflective region 152 is defined as a sensing electrode region and the second reflective region 154 is defined as another sensing electrode region. The sensing electrode region defined by the first reflective region 152 (first sub-reflective regions 152 A and 152 B) is used as one of the driving electrode and the sensing electrode in capacitive touch, and the sensing electrode region defined by the second reflective region 154 is used as the other one of the driving electrode and the sensing electrode in capacitive touch. The third reflective region 156 (third sub-reflective regions 156 A and 156 B) is used as a dummy electrode disposed between the driving electrode and the sensing electrode. In the present embodiment, the first sub-reflective region 152 A does not become electrically connected to the second reflective region 154 via the third sub-reflective region 156 A, and the first sub-reflective region 152 B does not become electrically connected to the second reflective region 154 via the third sub-reflective region 156 B.

In the present embodiment, the filter electrode layer includes a plurality of sensing electrode regions, and the sensing electrode regions are electrically insulated from one another. The filter electrode layer has a plurality of openings, and the openings respectively expose the first end surfaces S 1 . A vertical projection of the first reflective region 152 on the carrying surface CS falls within the range of a vertical projection of the first filter region 342 on the carrying surface CS, and a vertical projection of the second reflective region 154 on the carrying surface CS falls within the range of a vertical projection of the second filter region 344 on the carrying surface CS. Moreover, a vertical projection of the third reflective region 156 on the carrying surface CS falls within the range of a vertical projection of the third filter region 346 on the carrying surface CS. When the user views the optical film 300 with touch function from another side of the substrate 110 opposite to the carrying surface CS, the user at least does not see the first sub-reflective region 152 A, the first sub-reflective region 152 B, the second reflective region 154 , the third sub-reflective region 156 A, and the third sub-reflective region 156 B. When the user sees the image frame via the plurality of first openings 148 and the plurality of second openings 158 , the user does not see the reflective layer 150 . Therefore, the reflective layer 150 does not compromise the light uniformity of the optical film 300 with touch function, such that the light uniformity of the optical film 300 with touch function of the present embodiment is good and costs are lower, as is the case of the optical film 100 with touch function of the embodiment of FIG. 1A . Moreover, the electrical performance of the optical film 300 with touch function can be increased without affecting light uniformity. Moreover, since a vertical projection of the first openings 148 connected to the third openings 382 of the connecting layer 380 on the carrying surface CS falls within the range of a vertical projection of the third openings 382 on the carrying surface CS, in the present embodiment, the display image beams of the display device (not shown) used with the optical film 300 with touch function are transmitted in the columnar structures 130 , and after the display image beams are emitted from the first end surfaces S 1 of the columnar structures 130 , a portion of the display image beams passing through the third openings 382 then pass through the second openings 158 and the first openings 148 , and are emitted from another surface of the substrate 110 opposite to the carrying surface CS. Therefore, a portion of the display image beams can be emitted via the third openings 382 , such that the light intensity of the optical film 300 with touch function of the present embodiment is increased, and the light uniformity thereof is good.

FIG. 4A is a top view of an optical film with touch function of still yet another embodiment of the disclosure, FIG. 4B is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 4A along line I-I, FIG. 4C is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 4A along line II-II, and FIG. 4D is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 4A along line III-III. Please refer to all of FIG. 4A to FIG. 4D . In the present embodiment, an optical film 400 with touch function is similar to the optical film 200 with touch function of the embodiment of FIG. 2A . The components and relevant descriptions of the optical film 400 with touch function are as presented for the relevant descriptions of the optical film 200 with touch function, and are therefore not repeated herein. The difference between the optical film 400 with touch function and the optical film 200 with touch function is that, a connecting layer 380 of the optical film 400 with touch function has a plurality of third openings 382 (as shown in FIG. 4D ). Each of the third openings 382 is connected to one of the first openings 148 to form an opening of the filter electrode layer of the present embodiment. In the present embodiment, a vertical projection of the first openings 148 connected to the third openings 382 on the carrying surface CS falls within the range of a vertical projection of the third openings 382 on the carrying surface CS. Each of the third openings 382 is aligned with one of the first openings 148 , and is also aligned with one of the second openings 158 , and the area of the first openings 148 is equal to the area of the third openings 382 . However, in some embodiments, the area of the first openings 148 can be greater than or less than the area of the third openings 382 , and the disclosure is not limited thereto.

In the present embodiment, the filter layer 440 and the reflective layer 150 in the optical film 400 with touch function are electrically conductive. The filter layer 440 includes a first filter region 442 (first sub-filter regions 442 A and 442 B), a second filter region 444 , and a third filter region 446 (third sub-filter regions 446 A and 446 B). In the present embodiment, the first electrode region 462 includes first sub-electrode regions 462 A and 462 B, and the third electrode region 466 includes third sub-electrode regions 466 A and 466 B. The first sub-electrode region 462 A includes the first sub-filter region 442 A and the first sub-reflective region 152 A, the first sub-electrode region 462 B includes the first sub-filter region 442 B and the first sub-reflective region 152 B, the second electrode region 464 includes the second filter region 444 and the second reflective region 154 , the third sub-electrode region 466 A includes the third sub-filter region 446 A and the third sub-reflective region 156 A, and the third sub-electrode region 466 B includes the third sub-filter region 446 B and the third sub-reflective region 156 B.

In the present embodiment, the filter electrode layer includes a plurality of sensing electrode regions, and the sensing electrode regions are electrically insulated from one another. The first filter region 442 and the first reflective region 152 are defined as a sensing electrode region, and the second filter region 444 and the second reflective region 154 are defined as another sensing electrode region. The sensing electrode region defined by the first filter region 442 (first sub-filter regions 442 A and 442 B) and the first reflective region 152 (first sub-reflective regions 152 A and 152 B) is used as one of the driving electrode and the sensing electrode in capacitive touch, and the sensing electrode region defined by the second filter region 444 and the second reflective region 154 is used as the other one of the driving electrode and the sensing electrode in capacitive touch. Moreover, the third filter region 446 (third sub-filter regions 446 A and 446 B) and the third reflective region 156 (third sub-reflective regions 156 A and 156 B) are used as dummy electrodes disposed between the driving electrode and the sensing electrode. In the present embodiment, the gap G 1 exists between the third sub-reflective region 156 A and the first sub-reflective region 152 A, and the gap G 1 ′ exists between the third sub-filter region 446 A and the first sub-filter region 442 A. The gap G 2 exists between the third sub-reflective region 156 A and the second reflective region 154 , and the gap G 2 ′ exists between the third sub-filter region 446 A and the second filter region 444 . Moreover, the gap G 3 exists between the third sub-reflective region 156 B and the second reflective region 154 , and the gap G 3 ′ exists between the third sub-filter region 446 B and the second filter region 444 . Moreover, the gap G 4 exists between the third sub-reflective region 156 B and the first sub-reflective region 152 B, and the gap G 4 ′ exists between the third sub-filter region 446 B and the first sub-filter region 442 B. In the present embodiment, the first sub-reflective region 152 A does not become electrically connected to the second reflective region 154 via the third sub-reflective region 156 A or the filter layer 440 , and the first sub-reflective region 152 B does not become electrically connected to the second reflective region 154 via the third sub-reflective region 156 B or the filter layer 440 .

In the present embodiment, the filter electrode layer includes a plurality of sensing electrode regions, and the sensing electrode regions are electrically insulated from one another. The filter electrode layer has a plurality of openings, and the openings respectively expose the first end surfaces S 1 . A vertical projection of the first reflective region 152 on the carrying surface CS falls within the range of a vertical projection of the first filter region 442 on the carrying surface CS, and a vertical projection of the second reflective region 154 on the carrying surface CS falls within the range of a vertical projection of the second filter region 444 on the carrying surface CS. Moreover, a vertical projection of the third reflective region 156 on the carrying surface CS falls within the range of a vertical projection of the third filter region 446 on the carrying surface CS. When the user views the optical film 400 with touch function from another side of the substrate 110 opposite to the carrying surface CS, the user at least does not see the first sub-reflective region 152 A, the first sub-reflective region 152 B, the second reflective region 154 , the third sub-reflective region 156 A, and the third sub-reflective region 156 B. When the user sees the image frame via the plurality of first openings 148 and the plurality of second openings 158 , the user does not see the reflective layer 150 . Therefore, the reflective layer 150 does not compromise the light uniformity of the optical film 400 with touch function, such that the light uniformity of the optical film 400 with touch function of the present embodiment is good and costs are lower, as is the case of the optical film 100 with touch function of the embodiment of FIG. 1A . Moreover, the electrical performance of the optical film 400 with touch function can be increased without affecting light uniformity. Moreover, since a vertical projection of the first openings 148 connected to the third openings 382 of the connecting layer 380 on the carrying surface CS falls within the range of a vertical projection of the third openings 382 on the carrying surface CS, the light intensity of the optical film 400 with touch function of the present embodiment is increased and the light uniformity thereof is good, as is the case of the optical film 300 with touch function of the embodiment of FIG. 3A .

FIG. 5A is a top view of an optical film with touch function of still yet another embodiment of the disclosure, FIG. 5B is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 5A along line I-I, FIG. 5C is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 5A along line II-II, and FIG. 5D is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 5A along line III-III. Please refer to all of FIG. 5A to FIG. 5D . In the present embodiment, an optical film 500 with touch function is similar to the optical film 200 with touch function of the embodiment of FIG. 2A . The components and relevant descriptions of the optical film 500 with touch function are as presented for the relevant descriptions of the optical film 200 with touch function, and are therefore not repeated herein. The difference between the optical film 500 with touch function and the optical film 200 with touch function is that, a reflective layer 550 of the optical film 500 with touch function is not electrically conductive. Moreover, the filter layer 540 of the optical film 500 with touch function is electrically conductive, and the first sub-filter regions 542 A and 542 B are electrically insulated from the second filter region 544 .

In the present embodiment, the filter layer 540 includes a first filter region 542 (first sub-filter regions 542 A and 542 B), a second filter region 544 , and a third filter region 546 (third sub-filter regions 546 A and 546 B). Moreover, the reflective layer 550 includes a first reflective region 552 (first sub-reflective regions 552 A and 552 B), a second reflective region 554 , and a third reflective region 556 (third sub-reflective regions 556 A and 556 B). In the present embodiment, the first electrode region 562 includes first sub-electrode regions 562 A and 562 B, and the third electrode region 566 includes third sub-electrode regions 566 A and 566 B. The first sub-electrode region 562 A includes the first sub-filter region 542 A, the first sub-electrode region 562 B includes the first sub-filter region 542 B, the second electrode region 564 includes the second filter region 544 , the third sub-electrode region 566 A includes the third sub-filter region 546 A, and the third sub-electrode region 566 B includes the third sub-filter region 546 B. Moreover, the optical film 500 with touch function includes the insulating layer 170 and the connecting layer 180 . The insulating layer 170 is disposed between the filter layer 540 and the material layer 120 , and the connecting layer 180 is disposed between the insulating layer 170 and the material layer 120 . The insulating layer 170 connects the first sub-filter regions 542 A and 542 B and the second filter region 544 , and the connecting layer 180 connects the first sub-filter regions 542 A and 542 B. In the present embodiment, the insulating layer 170 is not electrically conductive, and the connecting layer 180 is electrically conductive.

In the present embodiment, the filter electrode layer includes a plurality of sensing electrode regions, and the sensing electrode regions are electrically insulated from one another. The first filter region 542 is defined as a sensing electrode region and the second filter region 544 is defined as another sensing electrode region. The sensing electrode region defined by the first filter region 542 (first sub-filter regions 542 A and 542 B) is used as one of the driving electrode and the sensing electrode in capacitive touch, and the sensing electrode region defined by the second filter region 544 is used as the other one of the driving electrode and the sensing electrode in capacitive touch. Moreover, the third filter region 546 (third sub-filter regions 546 A and 546 B) is used as a dummy electrode disposed between the driving electrode and the sensing electrode.

In the present embodiment, the filter electrode layer includes a plurality of sensing electrode regions, and the sensing electrode regions are electrically insulated from one another. The filter electrode layer has a plurality of openings, and the openings respectively expose the first end surfaces S 1 . A vertical projection of the first reflective region 552 on the carrying surface CS falls within the range of a vertical projection of the first filter region 542 on the carrying surface CS, and a vertical projection of the second reflective region 554 on the carrying surface CS falls within the range of a vertical projection of the second filter region 544 on the carrying surface CS. Moreover, a vertical projection of the third reflective region 556 on the carrying surface CS falls within the range of a vertical projection of the third filter region 546 on the carrying surface CS. When the user views the optical film 500 with touch function from another side of the substrate 110 opposite to the carrying surface CS, the user at least does not see the first sub-reflective region 552 A, the first sub-reflective region 552 B, the second reflective region 554 , the third sub-reflective region 556 A, and the third sub-reflective region 556 B. Specifically, when the user sees the image frame via the plurality of first openings 148 and the plurality of second openings 158 , the user does not see the reflective layer 550 . Therefore, the reflective layer 550 does not compromise the light uniformity of the optical film 500 with touch function, such that the light uniformity of the optical film 500 with touch function of the present embodiment is good and costs are lower, as is the case of the optical film 100 with touch function of the embodiment of FIG. 1A .

FIG. 6A is a top view of an optical film with touch function of still yet another embodiment of the disclosure, FIG. 6B is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 6A along line I-I, FIG. 6C is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 6A along line II-II, and FIG. 6D is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 6A along line III-III. Please refer to all of FIG. 6A to FIG. 6D . In the present embodiment, an optical film 600 with touch function is similar to the optical film 400 with touch function of the embodiment of FIG. 4A . The components and relevant descriptions of the optical film 600 with touch function are as presented for the relevant descriptions of the optical film 400 with touch function, and are therefore not repeated herein. The difference between the optical film 600 with touch function and the optical film 400 with touch function is that, a reflective layer 650 of the optical film 600 with touch function is not electrically conductive. Moreover, the filter layer 640 of the optical film 600 with touch function is electrically conductive, and the first sub-filter regions 642 A and 642 B are electrically insulated from the second filter region 644 .

In the present embodiment, the filter layer 640 includes a first filter region 642 (first sub-filter regions 642 A and 642 B), a second filter region 644 , and a third filter region 646 (third sub-filter regions 646 A and 646 B). Moreover, the reflective layer 650 includes a first reflective region 652 (first sub-reflective regions 652 A and 652 B), a second reflective region 654 , and a third reflective region 656 (third sub-reflective regions 656 A and 656 B). In the present embodiment, a first electrode region 662 includes first sub-electrode regions 662 A and 662 B, and a third electrode region 666 includes third sub-electrode regions 666 A and 666 B. The first sub-electrode region 662 A includes the first sub-filter region 642 A, the first sub-electrode region 662 B includes the first sub-filter region 642 B, the second electrode region 664 includes the second filter region 644 , the third sub-electrode region 666 A includes the third sub-filter region 646 A, and the third sub-electrode region 666 B includes the third sub-filter region 646 B. Moreover, the optical film 600 with touch function includes the insulating layer 170 and the connecting layer 380 . The insulating layer 170 is disposed between the filter layer 640 and the material layer 120 , and the connecting layer 380 is disposed between the insulating layer 170 and the material layer 120 . The insulating layer 170 connects the first sub-filter regions 642 A and 642 B and the second filter region 644 , and the connecting layer 380 connects the first sub-filter regions 642 A and 642 B. In the present embodiment, the insulating layer 170 is not electrically conductive, and the connecting layer 380 is electrically conductive.

In the present embodiment, the filter electrode layer includes a plurality of sensing electrode regions, and the sensing electrode regions are electrically insulated from one another. The first filter region 642 is defined as a sensing electrode region and the second filter region 644 is defined as another sensing electrode region. The sensing electrode region defined by the first filter region 642 (first sub-filter regions 642 A and 642 B) is used as one of the driving electrode and the sensing electrode in capacitive touch, and the sensing electrode region defined by the second filter region 644 is used as the other one of the driving electrode and the sensing electrode in capacitive touch. Moreover, the third filter region 646 (third sub-filter regions 646 A and 646 B) is used as a dummy electrode disposed between the driving electrode and the sensing electrode.

In the present embodiment, the filter electrode layer includes a plurality of sensing electrode regions, and the sensing electrode regions are electrically insulated from one another. The filter electrode layer has a plurality of openings, and the openings respectively expose the first end surfaces S 1 . A vertical projection of the first reflective region 652 on the carrying surface CS falls within the range of a vertical projection of the first filter region 642 on the carrying surface CS, and a vertical projection of the second reflective region 654 on the carrying surface CS falls within the range of a vertical projection of the second filter region 644 on the carrying surface CS. Moreover, a vertical projection of the third reflective region 656 on the carrying surface CS falls within the range of a vertical projection of the third filter region 646 on the carrying surface CS. When the user views the optical film 600 with touch function from another side of the substrate 110 opposite to the carrying surface CS, the user at least does not see the first sub-reflective region 652 A, the first sub-reflective region 652 B, the second reflective region 654 , the third sub-reflective region 656 A, and the third sub-reflective region 656 B. When the user sees the image frame via the plurality of first openings 148 and the plurality of second openings 158 , the user does not see the reflective layer 650 . Therefore, the reflective layer 650 does not compromise the light uniformity of the optical film 600 with touch function, such that the light uniformity of the optical film 600 with touch function of the present embodiment is good and costs are lower, as is the case of the optical film 100 with touch function of the embodiment of FIG. 1A . Moreover, since in the present embodiment, a vertical projection of the first openings 148 connected to the third openings 382 of the connecting layer 380 on the carrying surface CS falls within the range of a vertical projection of the third openings 382 on the carrying surface CS, the light intensity of the optical film 600 with touch function of the present embodiment is increased and the light uniformity thereof is good, as is the case of the optical film 300 with touch function of the embodiment of FIG. 3A .

FIG. 7A is a top view of an optical film with touch function of still yet another embodiment of the disclosure, FIG. 7B is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 7A along line I-I, FIG. 7C is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 7A along line II-II, and FIG. 7D is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 7A along line III-III. Please refer to all of FIG. 7A to FIG. 7D . In the present embodiment, an optical film 700 with touch function is similar to the optical film 200 with touch function of the embodiment of FIG. 2A . The components and relevant descriptions of the optical film 700 with touch function are as presented for the relevant descriptions of the optical film 200 with touch function, and are therefore not repeated herein. The difference between the optical film 700 with touch function and the optical film 200 with touch function is that, the optical film 700 with touch function does not have a reflective layer. Moreover, a filter layer 740 of the optical film 700 with touch function is electrically conductive, and the first sub-filter regions 742 A and 742 B are electrically insulated from the second filter region 744 .

In the present embodiment, the filter layer 740 includes a first filter region 742 (first sub-filter regions 742 A and 742 B), a second filter region 744 , and a third filter region 746 (third sub-filter regions 746 A and 746 B). In the present embodiment, a first electrode region 762 includes first sub-electrode regions 762 A and 762 B, and a third electrode region 766 includes third sub-electrode regions 766 A and 766 B. The first sub-electrode region 762 A includes the first sub-filter region 742 A, the first sub-electrode region 762 B includes the first sub-filter region 742 B, the second electrode region 764 includes the second filter region 744 , the third sub-electrode region 766 A includes the third sub-filter region 746 A, and the third sub-electrode region 766 B includes the third sub-filter region 746 B. Moreover, the optical film 700 with touch function includes the insulating layer 170 and the connecting layer 180 . The insulating layer 170 is disposed between the filter layer 740 and the material layer 120 , and the connecting layer 180 is disposed between the insulating layer 170 and the material layer 120 . The insulating layer 170 connects the first sub-filter regions 742 A and 742 B and the second filter region 744 , and the connecting layer 180 connects the first sub-filter regions 742 A and 742 B. In the present embodiment, the insulating layer 170 is not electrically conductive, and the connecting layer 180 is electrically conductive.

In the present embodiment, the filter electrode layer includes a plurality of sensing electrode regions, and the sensing electrode regions are electrically insulated from one another. The first filter region 742 is defined as a sensing electrode region and the second filter region 744 is defined as another sensing electrode region. The sensing electrode region defined by the first filter region 742 (first sub-filter regions 742 A and 742 B) is used as one of the driving electrode and the sensing electrode in capacitive touch, and the sensing electrode region defined by the second filter region 744 is used as the other one of the driving electrode and the sensing electrode in capacitive touch. Moreover, the third filter region 746 (third sub-filter regions 746 A and 746 B) is used as a dummy electrode disposed between the driving electrode and the sensing electrode.

In the present embodiment, the filter electrode layer includes a plurality of sensing electrode regions, and the sensing electrode regions are electrically insulated from one another. The filter electrode layer has a plurality of openings, and the openings respectively expose the first end surfaces S 1 . When the user views the optical film 700 with touch function at another side of the substrate 110 opposite to the carrying surface CS, the user at least does not see the reflective layer. Therefore, the reflective layer does not compromise the light uniformity of the optical film 700 with touch function, such that the light uniformity of the optical film 700 with touch function of the present embodiment is good and costs are lower, as is the case of the optical film 100 with touch function of the embodiment of FIG. 1A .

FIG. 8A is a top view of an optical film with touch function of still yet another embodiment of the disclosure, FIG. 8B is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 8A along line I-I, FIG. 8C is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 8A along line II-II, and FIG. 8D is a cross-sectional view of the optical film with touch function of the embodiment of FIG. 8A along line III-III. Please refer to all of FIG. 8A to FIG. 8D . In the present embodiment, an optical film 800 with touch function is similar to the optical film 400 with touch function of the embodiment of FIG. 4A . The components and relevant descriptions of the optical film 800 with touch function are as presented for the relevant descriptions of the optical film 400 with touch function, and are therefore not repeated herein. The difference between the optical film 800 with touch function and the optical film 400 with touch function is that, the optical film 800 with touch function does not have a reflective layer. Moreover, a filter layer 840 of the optical film 800 with touch function is electrically conductive, and the first sub-filter regions 842 A and 842 B are electrically insulated from the second filter region 844 .

In the present embodiment, the filter layer 840 includes a first filter region 842 (first sub-filter regions 842 A and 842 B), a second filter region 844 , and a third filter region 846 (third sub-filter regions 846 A and 846 B). In the present embodiment, the first electrode region 862 includes first sub-electrode regions 862 A and 862 B, and the third electrode region 866 includes third sub-electrode regions 866 A and 866 B. The first sub-electrode region 862 A includes the first sub-filter region 842 A, the first sub-electrode region 862 B includes the first sub-filter region 842 B, the second electrode region 864 includes the second filter region 844 , the third sub-electrode region 866 A includes the third sub-filter region 846 A, and the third sub-electrode region 866 B includes the third sub-filter region 846 B. Moreover, the optical film 800 with touch function includes the insulating layer 170 and the connecting layer 380 . The insulating layer 170 is disposed between the filter layer 840 and the material layer 120 , and the connecting layer 380 is disposed between the insulating layer 170 and the material layer 120 . The insulating layer 170 connects the first sub-filter regions 842 A and 842 B and the second filter region 844 , and the connecting layer 380 connects the first sub-filter regions 842 A and 842 B. In the present embodiment, the insulating layer 170 is not electrically conductive, and the connecting layer 380 is electrically conductive.

In the present embodiment, the filter electrode layer includes a plurality of sensing electrode regions, and the sensing electrode regions are electrically insulated from one another. The first filter region 842 is defined as a sensing electrode region and the second filter region 844 is defined as another sensing electrode region. The sensing electrode region defined by the first filter region 842 (first sub-filter regions 842 A and 842 B) is used as one of the driving electrode and the sensing electrode in capacitive touch, and the sensing electrode region defined by the second filter region 844 is used as the other one of the driving electrode and the sensing electrode in capacitive touch. Moreover, the third filter region 846 (third sub-filter regions 846 A and 846 B) is used as a dummy electrode disposed between the driving electrode and the sensing electrode.

In the present embodiment, the filter electrode layer includes a plurality of sensing electrode regions, and the sensing electrode regions are electrically insulated from one another. The filter electrode layer has a plurality of openings, and the openings respectively expose the first end surfaces S 1 . When the user views the optical film 800 with touch function at another side of the substrate 110 opposite to the carrying surface CS, the user at least does not see the reflective layer. Therefore, the reflective layer does not compromise the light uniformity of the optical film 800 with touch function, such that the light uniformity of the optical film 800 with touch function of the present embodiment is good and costs are lower, as is the case of the optical film 100 with touch function of the embodiment of FIG. 1A . Moreover, since in the present embodiment, a vertical projection of the first openings 148 connected to the third openings 382 of the connecting layer 380 on the carrying surface CS falls within the range of a vertical projection of the third openings 382 on the carrying surface CS, the light intensity of the optical film 800 with touch function of the present embodiment is increased and the light uniformity thereof is good, as is the case of the optical film 300 with touch function of the embodiment of FIG. 3A .

Based on the above, a plurality of columnar structures of the optical film with touch function of an embodiment of the disclosure is disposed in the material layer. A side of each of the columnar structures adjacent to the substrate has a first end surface. The filter electrode layer is disposed between the substrate and the material layer. The filter electrode layer includes a plurality of sensing electrode regions electrically insulated from one another. The filter electrode layer has a plurality of openings, and the openings respectively expose the first end surfaces. Therefore, the light uniformity of the optical film with touch function is good.

It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the disclosed embodiments without departing from the scope or spirit of the disclosure. In view of the foregoing, it is intended that the disclosure cover modifications and variations of this disclosure provided they fall within the scope of the following claims and their equivalents.