Adaptive Backlight Control for LCD Video Window Degradation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Smart liquid crystal display devices degrade at the video window position when exposed to high-brightness video pictures for extended periods, causing eye strain and reducing display life, as existing automatic backlight brightness adjustment methods do not effectively address this issue.
Innovation Solution
A method and device for self-adaptive backlight adjustment, which involves acquiring frames of video pictures at preset intervals, calculating brightness difference values, detecting the proportion of white pixels, and adjusting the backlight based on ambient brightness values captured by a camera to dynamically set the backlight value of the display video window area, thereby reducing the risk of screen degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the smart liquid crystal display device displays high-brightness video pictures for a long time, then the display brightness is maintained, but the liquid crystal display screen is prone to degrade at the video window position and user eyes are damaged
Solution Approach 1:
The patent implements dynamic backlight adjustment by continuously monitoring video picture brightness characteristics and automatically adjusting the backlight intensity accordingly. The system transitions from static backlight control to dynamic adaptation based on real-time content analysis, preventing display degradation while maintaining optimal viewing conditions.
Solution Approach 2:
The patent employs a feedback mechanism where the display device monitors its own output content (video picture brightness distribution), compares it against degradation risk thresholds, and adjusts the backlight accordingly. This closed-loop control system uses the brightness detection results to regulate backlight intensity, creating a self-adaptive protection mechanism.
2Illumination intensity
If the backlight brightness is automatically adjusted according to ambient brightness, then the display effect is improved, but the problem of screen degradation at video window position is not solved
Solution Approach 1:
The patent changes the control parameter from ambient brightness alone to a combination of ambient brightness and video content brightness characteristics. By introducing new parameters (average brightness of video pictures, brightness distribution statistics) into the control equation, the system can distinguish between ambient lighting conditions and content-induced brightness risks.
Solution Approach 2:
The patent segments the backlight control into different operational modes: normal ambient adaptation mode and high-brightness protection mode. By dividing the control logic based on video content characteristics, the system can apply different adjustment strategies - standard ambient-based adjustment for normal content and aggressive brightness reduction for high-brightness content that poses degradation risk.
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
The present disclosure discloses a backlight self-adaptive adjustment method, including: acquiring one frame of picture every preset time interval when in video mode; determining whether a first picture satisfies a preset backlight self-adaptive adjustment condition, according to the brightness difference value between the first picture acquired at a moment and a second picture acquired within the preset time interval from the moment, and the amount of white pixels of the first picture; acquiring the brightness value of a pixel in a third picture captured from current ambient by a camera, when the first picture satisfies the preset backlight self-adaptive adjustment condition; setting a backlight value of the display video window area of the display screen based on the brightness value of the pixel in the third picture. The disclosure also discloses a backlight self-adaptive adjustment device. The disclosure sets the backlight value of the display video window area of the display screen based on the brightness value of a pixel in the third picture captured from current circumstance via a camera, thereby decreasing the risk of degradation that is prone to occur to display screen at the display video window.