Noise detection device of display module and noise detection method

This application claims priority to CN application 201610247073.X filed on, Apr. 20, 2016, the disclosure of which is incorporated in its entirety by reference herein.

The present disclosure relates to detection technical field, and more particularly, to a noise detection device of a display module and a noise detection method.

With the evolution of photoelectric and semiconductor technology, the flat panel display has been developed rapidly, and among various flat panel displays, the liquid crystal display (LCD) has been applied to all aspects of production and life since it has many advantages, such as high space utilization efficiency, low power consumption, zero radiation and low electromagnetic interference.

Before a liquid crystal display leaves the factory, noise detection is normally required to be performed on the liquid crystal display, so as to determine whether the liquid crystal display is a qualified product. Therefore, a noise detection device is needed to perform noise detection on the liquid crystal display before leaving the factory.

In order to achieve the above purpose, the present disclosure provides a noise detection device of a display module, including: a storage module, a processing module and an encoding module; the storage module is used to store parallel video data, the processing module is used to transmit the stored parallel video data to the encoding module, the encoding module is used to convert the stored parallel video data into serial video data through encoding and to transmit the converted serial video data to a timing controller of a display module; the processing module is used to receive mini-LVDS data generated by the timing controller based on the converted serial data, and to convert the mini-LVDS data into the parallel video data; the processing module is used to compare the stored parallel video data with the converted parallel video data, and to determine whether the display module is qualified for noise control according to the comparison result.

Furthermore, the processing module includes a field-programmable gate array.

Furthermore, the storage module includes a synchronous dynamic random access memory, and the encoding module includes a digital video imaging encoding chip.

Furthermore, a result of comparing the stored parallel video data with the converted parallel video data is a percentage of bit error rate of the converted parallel video data; wherein the processing module is used to determine whether the display module is qualified for noise control based on the percentage of bit error rate of the converted parallel video data.

The present disclosure provides a noise detection method of a display module, including: converting the stored parallel video data into serial video data through encoding and to transmit the converted serial video data to a timing controller of a display module; receiving mini-LVDS data generated by the timing controller based on the converted serial data, and converting the mini-LVDS data into the parallel video data; comparing the converted parallel video data with the stored parallel video data and determining whether the display module is qualified for noise control according to the comparison result.

Furthermore, the method of converting the stored parallel video data into serial video data through encoding and transmitting the converted serial video data to a timing controller of a display module includes: transmitting the parallel video data stored in the storage module to the encoding module by using the processing module; converting the stored parallel video data into serial video data through encoding by using the encoding module, and transmitting the converted serial video data to a timing controller of a display module by using the encoding module.

Furthermore, mini-LVDS data generated by the timing controller are received based on the converted serial data by using the processing module, and the mini-LVDS data are converted into the parallel video data by using the processing module.

Furthermore, the converted parallel video data are compared with the stored parallel video data by using the processing module, and whether the display module is qualified for noise control is determined according to the comparison result by using the processing module.

Furthermore, a result of comparing the stored parallel video data with the converted parallel video data is a percentage of bit error rate of the converted parallel video data; wherein the method of determining whether the display module is qualified for noise control according to the comparison result includes: determining whether the display module is qualified for noise control based on the percentage of bit error rate of the converted parallel video data.

The advantageous effect of the present disclosure is as follows: The present disclosure provides a noise detection device of a display module and a noise detection method to implement noise detection on a display module before leaving the factory, in order to determine whether the display module is qualified before leaving the factory.

These and/or other aspects, features and advantages of the invention will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

FIG. 1 is a block diagram of a noise detection device of a display module according to an embodiment of the present disclosure;

FIG. 2 is a flow diagram of a noise detection method of a display module according to an embodiment of the present disclosure.

Here, embodiments of the present invention will be described in detail below by referring to the accompany drawings. However, the present invention may be implemented in many different ways, and should not be interpreted as being limited to the specific embodiment set forth herein. Instead, these embodiments are provided for explaining the principle and actual application of the present invention, thus other skilled in the art can understand various embodiments and amendments which are suitable for specific intended applications of the present invention.

FIG. 1 is a block diagram of a noise detection device of a display module according to an embodiment of the present disclosure.

Referring to FIG. 1 , a noise detection device 100 of a display module according to an embodiment of the present disclosure includes: a storage module 110 , a processing module 120 and an encoding module 130 .

The storage module 110 stores an original parallel video data, such as the original parallel R, G, B data. In the present embodiment, the storage module 110 may be a synchronous dynamic random access memory (SDRAM), but the present disclosure is not limited thereto.

The processing module 120 transmits the stored parallel video data to the encoding module 130 . After receiving the stored parallel video data, the encoding module 130 converts the stored parallel video data into serial video data through encoding. The encoding module 130 transmits the converted serial video data to a timing controller 210 of a display module 200 .

After receiving the converted serial video data, the timing controller 210 of the display module 200 processes the converted serial video data into the mini-LVDS data. Here, the mini-LVDS data are normally provided as display data to the respective pixels on the display panel. In the present embodiment, the timing controller 210 also returns the mini-LVDS data to the processing module 120 .

After receiving the mini-LVDS data, the processing module 120 converts the mini-LVDS data into the parallel video data. The processing module 120 compares the stored parallel video data with the converted parallel video data, and determines whether the display module 200 is qualified for noise control according to the comparison result.

Furthermore, the processing module 120 compares the stored parallel video data with the converted parallel video data, in order to determine a percentage of bit error rate of the converted parallel video data. The processing module 120 determines whether the display module is qualified for noise control based on the percentage of bit error rate of the converted parallel video data.

For example, a threshold value may be set. When the percentage of bit error rate of the converted parallel video data is not less than the threshold value, it may be determined that the display module 200 is not qualified for noise control; when the percentage of bit error rate of the converted parallel video data is less than the threshold value, it may be determined that the display module 200 is qualified for noise control.

In the present embodiment, the processing module 120 may be a field-programmable gate array (FPGA), but the present disclosure is not limited thereto, and the processing module 120 may also be other proper types of processing chips. In the present embodiment, the encoding module 130 may be a digital video imaging (DVI) encoding chip, but the present disclosure is not limited thereto, and the encoding module 130 may also be other proper types of encoding chips.

FIG. 2 is a flow diagram of a noise detection method of a display module according to an embodiment of the present disclosure.

Referring to FIGS. 1 and 2 , in step S 210 , the parallel video data stored in the storage module 110 are transmitted to the encoding module 130 by using the processing module 120 .

In step S 220 , the stored parallel video data are converted into serial video data through encoding by using the encoding module 130 , and the converted serial video data are transmitted to a timing controller 210 of a display module 200 by using the encoding module 130 .

In step S 230 , mini-LVDS data generated by the timing controller 210 are received based on the converted serial data by using the processing module 120 , and the mini-LVDS data are converted into the parallel video data by using the processing module 120 . Here, after receiving the converted serial video data, the timing controller 210 of the display module 200 processes the converted serial video data into the mini-LVDS data. Here, the mini-LVDS data are normally provided as display data to the respective pixels on the display panel. In the present embodiment, the timing controller 210 also returns the mini-LVDS data to the processing module 120 .

In step S 240 , the converted parallel video data are compared with the stored parallel video data by using the processing module 120 , and whether the display module 200 is qualified for noise control is determined according to the comparison result by using the processing module 120 .

Here, the processing module 120 is used to compare the stored parallel video data with the converted parallel video data, in order to determine a percentage of bit error rate of the converted parallel video data. The processing module 120 is used to determine whether the display module is qualified for noise control based on the percentage of bit error rate of the converted parallel video data.

For example, a threshold value may be set. When the percentage of bit error rate of the converted parallel video data is not less than the threshold value, it may be determined that the display module 200 is not qualified for noise control; when the percentage of bit error rate of the converted parallel video data is less than the threshold value, it may be determined that the display module 200 is qualified for noise control.

As mentioned above, according to an exemplary embodiment of the present disclosure, a noise detection device of a display module and a noise detection method are provided to perform noise detection on the display module before leaving the factory, in order to determine whether the display module is qualified before leaving the factory.

Although the present invention is described with reference to the special exemplary embodiment, while those skilled in the art will understand: various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and its equivalents.