Screening device for screening non-uniformity of backlight source and testing method of screening device

Abstract

The invention discloses a screening device for screening the non-uniformity of a backlight source and a testing method of the screening device. The screening device comprises a liquid crystal screen (1), a structural part (2) and a diffusion plate (3), wherein the structural part (2) is provided with a screen framework for mounting the liquid crystal screen (1) and a plate framework for mounting the diffusion plate (3); the section of an inner cavity of the structural part (2) is rectangular and a backlight framework (6) is mounted in the inner cavity of the structural part (2); a backlight source (5) is fixedly mounted on the backlight framework (6); one side of the backlight framework (6), which is provided with the backlight source (5), is placed towards the diffusion plate (3); a circuit board (8) with a debugging wire is mounted on the backlight source (5); and the diffusion plate (3) is mounted between the liquid crystal screen (1) and the backlight source (5). The screening device provided by the invention is used for screening the non-uniformity of the backlight source before the backlight source is mounted on a liquid crystal module, thereby assuring the non-uniformity of the liquid crystal module through assuring the non-uniformity of the backlight source which is mounted in the liquid crystal module.

Description

technical field [0001] The invention relates to a screening device and a testing method for screening the unevenness of a backlight source. Background technique [0002] The liquid crystal display module is a key component of the airborne information display system. The airborne information display system is the "eyes" of the aircraft. All flight and guidance operations of the aircraft can be completed on the airborne display system. At the same time, the liquid crystal display module is widely used in the navy and army. And in the aviation industry, the quality of the liquid crystal display module directly affects the operator's judgment on the environment, and the backlight is the core component of the liquid crystal display module. At present, the backlight source is mainly composed of LED lights. In order to improve the color gamut of the liquid crystal display module, most of them are composed of LED white lights and LED colored lights. Due to the current contradiction ...

AI Technical Summary

Problems solved by technology

At present, the backlight source is mainly composed of LED lights. In order to improve the color gamut of the liquid crystal display module, most of them are composed of LED white lights and LED colored lights. Due to the current contradiction between LED light splitting and material utilization, light splitting cannot be divided too finely , this will cause the backlight source of some welded LED lamps to be uneven at low brightness. This unevenness is not manifested in uneven brightness, but visually uneven, and currently there is no technical index to go up. What can be measured can only be observed visually, so it seriously affects the display quality of the LCD module

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