Mini LED Display Gray Scale Compensation for Thermal Sticking
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Solution Overview
Problem
Mini LED display screens face issues with heat dissipation, leading to temperature rises and visual sticking images due to inefficient luminous efficiency, which affects the display quality.
Innovation Solution
A display apparatus with a gray scale compensation module that samples frame image data, determines initial and target gray scale compensation data, and performs compensation to optimize display quality by addressing temperature-related issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If mini LED display screen operates for long time, then heat energy accumulates and temperature rises, but luminous efficiency decreases and visual sticking image appears
Solution Approach 1:
The patent applies preliminary action by performing gray scale compensation in advance based on predicted temperature rise. The system calculates compensation values before the actual temperature issue occurs, using historical temperature data and luminous efficiency characteristics to pre-adjust the gray scale parameters, thereby preventing visual sticking images before they appear
Solution Approach 2:
The patent implements feedback by continuously monitoring temperature changes and luminous efficiency degradation, then using this information to dynamically adjust gray scale compensation parameters. The system creates a closed-loop control where temperature and display quality measurements feed back into the compensation algorithm to optimize performance in real-time
2Device complexity
If gray scale compensation is performed uniformly across the screen, then processing complexity is low, but temperature difference between regions cannot be addressed
Solution Approach 1:
The patent applies local quality by dividing the display screen into multiple regional zones and implementing differentiated gray scale compensation strategies for each zone. Each region receives customized compensation parameters based on its specific temperature characteristics and luminous efficiency degradation patterns, allowing precise correction of local temperature differences while maintaining manageable overall system complexity
3Device complexity
If temperature rise is not compensated, then display structure remains simple, but visual sticking image occurs and display effect deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting gray scale parameters in response to temperature variations. The system modifies luminous efficiency parameters, gray scale mapping tables, and compensation coefficients based on measured temperature data, transforming the display's operational parameters to counteract temperature-induced degradation without requiring complex hardware modifications
Data Source
AI summary
A display apparatus includes a gray scale compensation apparatus including a sampling module configured to sample frame image data in a video frame sequence, to obtain current frame image data, and a processor configured to: determine initial gray scale compensation data according to first gray scale data of each pixel in current frame image data and a pre-generated gray scale compensation data table; acquire gray scale compensation information of an image data set corresponding to current frame image data, including gray scale compensation coefficients of the current frame image data in respective display regions; determine target gray scale compensation data according to the gray scale compensation coefficients of the current frame image data in respective display regions and the initial gray scale compensation data; and perform gray scale compensation on the current frame image data according to the target gray scale compensation data, to obtain compensated frame image data.