Backlight module and display device

The present invention relates to the field of liquid crystal display techniques. In particular, the present invention relates to a backlight module and a display device.

With the rapid development of display techniques, liquid crystal display modules put higher requirements on screen ratio. Associated components such as a camera or an earphone are installed in a central opening of the liquid crystal display module to effectively increase the screen ratio. Moreover, small and medium-sized liquid crystal display modules, such as mobile phones, tablets and notebooks, generally use side-illumination backlight sources.

Technical Problem

As shown in FIG. 1 , a backlight side at an opening 4 position is bound to form a dark area 5 of a light source, and light in the dark area 5 is unevenly distributed, thereby affecting display effect of the liquid crystal screen.

In the prior art, the dark area 5 is eliminated by means of adjusting sizes and positions of screen dots of a light-guiding plate around the opening, but the technical difficulty is greater and the cost of the light-guiding plate is higher.

Therefore, it is necessary to provide a new backlight module and a display device to improve a stability of the backlight module, thereby solving the problem about the dark area of a side away from the light in the prior art.

An object of the present invention is to provide a backlight module and a display device. A dimming component is disposed at a backlight side of a through-hole region. After a first light-reflecting region receiving light from a backlight source, the light is reflected to the backlight side of the through-hole to brighten the backlight side.

The present invention provides a backlight module including a light-guiding plate, a backlight source disposed at a side of the light-guiding side, and a dimming component. An end of the light-guiding plate away from the backlight source is provided with at least one through-hole, and the through-hole includes a facing-light side toward the backlight source as well as a backlight side away from the backlight source. The dimming component is disposed at a side of the light-guiding plate away from the backlight source and corresponds to the backlight side of the through-hole.

Furthermore, the dimming component includes: a light reflection layer toward the backlight source, and the light reflection layer includes: at least one first light-reflecting region. The first light-reflecting region is disposed to correspond to the backlight side of the through-hole.

Furthermore, the light reflection layer further includes: at least one second light-reflecting region connected to the first light-reflecting region.

Furthermore, a reflectance of the first light-reflecting region is greater than a reflectance of the second light-reflecting region, and the reflectance of the first light-reflecting region progressively increases from both sides toward middle.

Furthermore, the backlight module further includes an iron frame and a plastic frame, and the plastic frame is embedded in inner sides of the iron frame. The iron frame and the plastic frame are used together to surround and define the light-guiding plate and the backlight source. The light reflection layer of the dimming component is disposed at an inner side of the plastic frame away from the backlight source.

Furthermore, the plastic frame is integrally formed with the light reflection layer of the dimming component.

Moreover, the inner side of the plastic frame away from the backlight source is provided with a recess, and the recess corresponds to the backlight side.

Moreover, the dimming component further includes: an adhesive layer disposed at a side of the light reflection layer the backlight source. The dimming component is adhered within the recess by the adhesive layer, and a depth of the recess is 0.05 mm to 0.3 mm.

Moreover, material of the light reflection layer includes silver or titanium dioxide.

The present invention further provides a display device including above backlight module.

Advantageous Effects

The present invention provides a backlight module and a display device. The dimming component is disposed at the backlight side of the through-hole region, and the light reflection layer of the dimming component is located at the inner side of the iron frame. After the light reflection layer (i.e, the first light-reflecting region) receiving the light from the backlight source, the light is reflected to the backlight side of the through-hole to brighten the backlight side. The first light-reflecting region enables a relatively dark area of the backlight side to obtain stronger reflection light, and enables a relatively bright area of the backlight side to obtain weaker reflection light, so that a brightness is uniformly distributed after the backlight side being brightened, thereby achieving a brightening effect on the dark area of the backlight side.

In order to more clearly illustrate technical solutions in embodiments of the present invention, the drawings required for using in the description of the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the embodiments of the present invention. For ordinary technicians in the art, other drawings may also be obtained from these drawings without paying for creative labor.

FIG. 1 is a structural schematic view of a backlight module in the prior art.

FIG. 2 is a structural schematic view of a backlight module provided by a first embodiment of the present invention.

FIG. 3 is a schematic view of an inner structure of the backlight module provided by the first embodiment of the present invention, and the schematic view mainly shows a structure of a light reflection layer.

FIG. 4 is a structural schematic view of a backlight module provided by a second embodiment of the present invention.

FIG. 5 is a structural schematic view of a backlight module provided by a third embodiment of the present invention.

backlight module 100 , 100 a , 100 b ; dimming component 10 ; through-hole region 120 ; backlight source 104 , 104 a . 104 b ; facing-light side 1201 ; backlight side 1202 ; light reflection layer 101 , 101 a , 101 b , first light-reflecting region 1011 ; second light-reflecting region 1012 ; plastic frame 105 , 105 a , 105 b ; recess 106 b ; adhesive layer 107 b

Referring to the accompanying drawings, the description of following embodiments is provided to illustrate the specific embodiment practiced by the present invention. Directional terms described by the present invention, such as upper, lower, front, back, left, right, inner, outer, side, etc., are only directions by referring to the accompanying drawings. Terms of elements mentioned in the present invention, such as first, second, etc., are only distinguishing between different parts and can be preferably expressed. In the drawings, structurally similar units are denoted by the same reference numerals.

The embodiments of the present invention will be described in detail herein with reference to the drawings. The present invention may be represented in many different forms and should not be only construed as being limited to the specific embodiments illustrated herein. The embodiments of the present invention are provided to be construed as the practical application of the present invention, and thereby technicians in the art can understand various embodiments of the present invention and various modifications suitable for the particularly expected application.

A First Embodiment

As shown in FIG. 2 , the first embodiment provides a backlight module 100 including a dimming component 10 , an iron frame 102 , a light-guiding plate 103 , a backlight source 104 , a plastic frame 105 and a through-hole region 120 . The through-hole region 120 is disposed on the light-guiding plate 103 , and a position of the through-hole region 120 generally corresponds to a position of a camera below a screen.

The position of the through-hole region 120 may be located at a middle of the light-guiding plate 103 , and may also be located at both sides of the light-guiding plate 103 .

The backlight source 104 is disposed at a side of the light-guiding plate 103 , and away from the through-hole region 120 . The backlight source 104 is a side-edge light-emitting diode (LED).

The through-hole region 120 includes a facing-light side 1201 toward the backlight source 104 and a backlight side 1202 away from the backlight source 104 . The dimming component 101 is disposed at the other side of the light-guiding plate 103 parallel to the backlight source 104 , and corresponds to the backlight side 1202 .

The plastic frame 105 and the iron frame 102 surround and define the light-guiding plate 103 . The light-guiding plate 103 is provide with a through-hole 1031 corresponding to the through-hole region 120 .

A shape of the through-hole 1031 includes a circle, an ellipse, or other symmetric shapes.

In the embodiment, the dimming component 10 includes a light reflection layer 101 , and material of the light reflection layer 101 includes material with a light-reflecting property such as silver or titanium dioxide.

The light reflection layer 101 is disposed at an inner side of the plastic frame 105 away from the backlight source 1101 , and the light reflection layer 101 is parallel to the backlight source 1101 , which is to say, the light reflection layer 101 and the backlight source 1101 are respectively located at opposite sides of the iron frame 102 , thus facing each other, so that the light reflection layer 101 can reflects light 130 from the backlight source 1101 to the backlight side 1202 of the through-hole region 120 .

As shown in FIG. 3 , the light reflection layer 101 is disposed at an end of the inner side of the plastic frame 105 . In the embodiment, the light reflection layer 101 is actually formed by means of spraying, printing or vapor deposition on a conventional plastic frame 105 . That is, the light reflection layer 101 is integrally manufactured with the plastic frame 105 ; specifically, together with the side of the plastic frame 105 away from the backlight source 104 .

The light reflection layer 101 includes a first light-reflecting region 1011 and at least one second light-reflecting region 1012 , and the first light-reflecting region 1011 corresponds to the backlight side 1202 of the through-hole region 120 (as seen in FIG. 2 ). In the embodiment, the light reflection layer 101 includes two second light-reflecting region 1012 symmetrically located on both sides of the first light-reflecting region 1011 .

A reflectance of the first light-reflecting region 1011 is greater than a reflectance of the second light-reflecting region 1012 , and the reflectance of the first light-reflecting region 1011 progressively increases from the both sides toward middle to form a graded reflection region.

In the embodiment, the graded reflectance of the first light-reflecting region 1011 can be set up according to a distribution of the light source on the backlight side 1202 obtained by means of experimental or computational simulation, and thereby the light source on the backlight side 1202 can be uniformly distributed.

The first embodiment further provides a display device including above backlight module and a display panel. The display panel is disposed on the backlight module.

In the embodiment, after the light reflection layer (i.e. the first light-reflecting region 1011 ), which is located at the backlight side 1202 of the through-hole 1031 , receiving the light from the backlight source 104 , the light is reflected to the backlight side 1202 of the through-hole 1031 to brighten the backlight side 1202 . The first light-reflecting region 1011 enables the backlight side 1202 to obtain stronger reflected light. Moreover, because the reflectance of the first light-reflecting region 1011 progressively increases from the both sides toward the middle to form the graded reflection region, thus balancing a defect of the light unevenness on the backlight side 1202 of the through-hole 1031 . For example, a relatively bright area at the both sides of the backlight side 1202 can obtain weaker reflection light, and a relatively dark area at the middle side of the backlight side 1202 can obtain stronger reflection light, so that a brightness is uniformly distributed after the backlight side 1202 being brightened, thereby achieving a brightening effect.

A Second Embodiment

As shown in FIG. 4 , the second embodiment provides a backlight module 100 a . The difference from the first embodiment is that the backlight module 100 a provided by the second embodiment further includes a plastic frame 105 a.

The plastic frame 105 a is embedded in inner sides of the iron frame 102 a , and the iron frame 102 a can fix the plastic frame 105 a.

The light reflection layer 101 a is disposed at the inner side of the plastic frame 105 a away from the backlight source 104 a , and the light reflection layer 101 a is parallel to and facing the backlight source 104 a.

The light reflection layer 101 a is actually formed on plastic material by means of spraying, printing, vapor deposition or multi-film layer combination. The light reflection layer 101 a is placed at a height flush with the plastic frame 105 a.

The plastic frame 105 a is made of the plastic material, and its color is white, gray or black. The plastic frame 105 a is integrally formed.

In comparison to the first embodiment, the light reflection layer 101 a in the second embodiment is solely disposed on the inner side of the end of the plastic frame 105 a , and it does not hinder the integral formation of the plastic frame 105 a.

A Third Embodiment

As shown in FIG. 5 , the third embodiment provides a backlight module 100 b . The difference from the second embodiment is that the inner side of the plastic frame 105 b away from the backlight source 104 b provides with a recess 106 b , and the recess 106 b corresponds to the backlight side 1202 b.

The light reflection layer 101 b is disposed within the recess 106 b . Specifically, the side of the light reflection layer 101 b away from the backlight source 104 b is provided with an adhesive layer 107 b . The light reflection layer 101 b is adhered within the recess 106 b by the adhesive layer 107 b.

The light reflection layer 101 b is disposed within the recess 106 b , and a depth of the recess 106 b is 0.05 mm to 0.3 mm.

In the third embodiment, the side of the light reflection layer 101 b is provided with the adhesive layer 107 b , thus easily adhering. And the backlight module 100 b is simple to assemble and low in cost.

The technical scope of the present invention is not only limited to the content of the description. The technicians in the art can make various modifications and alterations to the embodiments without departing from the technical spirit of the present invention, and all of the modifications and alterations are within the scope of the present invention.