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Liquid crystal display module brightness adjustment method, test board, system and device

A liquid crystal display module, brightness adjustment technology, applied in static indicators, instruments, etc., can solve problems such as brightness differences, and achieve the effect of eliminating visual differences, reducing rejection and rework costs, and uniformly displaying brightness

Active Publication Date: 2020-04-14
SKYWORTH LCD SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the extensive application of liquid crystal display products in various fields and the innovation of display technology, people have higher and higher requirements for the consistency of display brightness of liquid crystal display products. Differences in batches lead to visual differences that can be distinguished by human eyes in the brightness of different LCD products even if they are of the same model
[0003] In the existing technology, by setting the brightness control range, the LCD modules that exceed the brightness control range are removed from the LCD modules that meet the brightness control range and reworked. However, based on the consideration of reducing rework costs, the brightness control range is usually reduced It is set to a wide range. Therefore, the existing technology can only reduce the brightness difference between the LCD modules to a certain extent, and there are often visual differences between the LCD modules that can be distinguished by human eyes.

Method used

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  • Liquid crystal display module brightness adjustment method, test board, system and device
  • Liquid crystal display module brightness adjustment method, test board, system and device
  • Liquid crystal display module brightness adjustment method, test board, system and device

Examples

Experimental program
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Effect test

Embodiment 1

[0041] An embodiment of the present invention provides a method for adjusting the brightness of a liquid crystal display module, see figure 1 The flow chart of the brightness adjustment method shown is used to unify the brightness between different liquid crystal display modules and improve the user's visual experience. The method consists of a brightness detection device and a test board in the test board in the liquid crystal display module brightness adjustment system to execute, including the following steps:

[0042] S101. Send preset PWM control data to the driver IC of the liquid crystal display module.

[0043] Send preset PWM (PulseWidth Modulation, pulse width modulation) control data to a driver IC (Integrated Circuit, integrated circuit) of the liquid crystal display module. Among them, the control method of the basic principle of PWM is to control the on-off of the switching device of the inverter circuit, so that the output terminal obtains a series of pulses wi...

Embodiment 2

[0062] The embodiment of the present invention provides a method for adjusting the brightness of a liquid crystal display module, which is used for the test board in the brightness adjustment system of a liquid crystal display module composed of a brightness detection device and a test board, which is optimized on the basis of Embodiment 1, see figure 2 The preferred flowchart of the brightness adjustment method shown includes the following steps:

[0063] S200. Setting a preset brightness range and backlight current output gear of the liquid crystal display module.

[0064] The preset brightness range can be set according to the performance of the liquid crystal and the actual use scene. For the latter, you can consider whether the content displayed by the LCD module can reduce the recognition of the brightness by the human eye. If so, you can choose a preset with a wider range. Set the brightness range, if not, you need to select a narrower preset brightness range.

[0065...

Embodiment 3

[0091] An embodiment of the present invention provides a liquid crystal display module brightness adjustment test board, see image 3 The schematic diagram of the test board structure shown, the test board includes the following modules:

[0092] The PWM control data sending module 301 is configured to send preset PWM control data to the driver IC of the liquid crystal display module.

[0093] An initial brightness acquisition module 302, configured to acquire the initial brightness of the liquid crystal display module, the initial brightness being the liquid crystal display module corresponding to the preset PWM signal generated by the drive IC according to the preset PWM control data the initial brightness of .

[0094] A judging module 303, configured to judge whether the initial brightness is within a preset brightness range.

[0095] The adjustment module 304 is used to adjust the preset PWM control data according to the preset adjustment rule to adjust the preset PWM s...

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Abstract

The invention discloses a brightness adjustment method for a liquid crystal display module group, a test board, a system, and equipment. The method comprises the steps: transmitting preset PWM control data to a drive IC of the liquid crystal display module group; obtaining the initial brightness of the liquid crystal display module group, wherein the initial brightness is corresponding to a preset PWM signal generated by the drive IC according to the PWM control data; judging whether the initial brightness is within a preset brightness range or not: adjusting the PWM control data according to a preset adjustment rule so as to adjust the preset PWM signal if the initial brightness is not within the preset brightness range, and enabling the current brightness displayed by the liquid crystal display module group based on the current PWM control data and the current PWM signal to be within the preset brightness range; enabling the current PWM control data to be burned in the drive IC. According to the embodiment of the invention, the brightness difference which can be seen by human eyes is converted into invisible changes of a backlight current, thereby achieving a purpose of limiting the brightness difference between the liquid crystal display module groups in a smaller preset brightness range.

Description

technical field [0001] The embodiments of the present invention relate to liquid crystal display technology, in particular to a method for adjusting brightness of a liquid crystal display module, a test board, a system and equipment. Background technique [0002] With the extensive application of liquid crystal display products in various fields and the innovation of display technology, people have higher and higher requirements for the consistency of display brightness of liquid crystal display products. Differences in batches lead to visual differences that can be distinguished by human eyes in the brightness of different liquid crystal display products even if they are of the same model. [0003] In the existing technology, by setting the brightness control range, the LCD modules that exceed the brightness control range are removed from the LCD modules that meet the brightness control range and reworked. However, based on the consideration of reducing rework costs, the br...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/34G09G3/36G09G3/00
CPCG09G3/006G09G3/3406G09G3/3413G09G3/36
Inventor 余龙江周忠伟常伟
Owner SKYWORTH LCD SHENZHEN CO LTD