A method and system for controlling backlight uniformity of an LCD liquid crystal display

CN122392450APending Publication Date: 2026-07-14SHENZHEN GOODSTAR TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN GOODSTAR TECH CO LTD
Filing Date
2026-06-17
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

After long-term use, existing LCD screens suffer from backlight uniformity deterioration due to optical sensor performance drift and inconsistent LED aging. Existing control methods are ineffective in addressing this issue, resulting in uneven brightness.

Method used

By acquiring the adjustment parameters of the photosensitive and light-emitting devices inside the display screen, the brightness readings of the photosensitive devices are corrected based on a pre-established performance prediction model, and the driving commands of the light-emitting devices are compensated to adjust the driving of the light-emitting devices in order to maintain backlight uniformity.

Benefits of technology

It effectively solves the problem of backlight uniformity deterioration caused by optical sensor drift and LED bead aging, improves the long-term stability and visual experience of the display screen, and extends its service life.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to a backlight uniformity control method and system for an LCD liquid crystal display screen. The method comprises: obtaining first adjustment parameters of a light sensing device inside the display screen and second adjustment parameters of a light emitting device; correcting original brightness readings of the light sensing device based on the first adjustment parameters of the light sensing device and a pre-established performance prediction model of the light sensing device, to obtain corrected brightness readings; compensating original driving instructions of the light emitting device based on the second adjustment parameters of the light emitting device and a pre-established performance prediction model of the light emitting device, to obtain compensated driving instructions; and adjusting driving of the light emitting device based on the corrected brightness readings and the compensated driving instructions, to maintain backlight uniformity of the display screen. Therefore, the backlight uniformity of the LCD liquid crystal display screen after long-term use can be significantly improved, the service life of the display screen is prolonged, and a better visual experience is provided.
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