Display Panel Gamma Compensation for Temperature-Driven Color Shift
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Solution Overview
Problem
Micro-LED display panels experience color shifts due to varying light efficiencies of display pixels at different temperatures, leading to inadequate color coordinate compensation.
Innovation Solution
A method and device that determine the actual temperature of the display panel by combining initial display parameters and ambient temperature, using a compensation gamma table to provide accurate compensation data signals to pixels, thereby adjusting for color shifts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed gamma table is used for display calibration, then the initial color accuracy is improved, but the color stability under varying temperature conditions deteriorates
Solution Approach 1:
The patent implements dynamic gamma table selection based on real-time temperature sensing. The system transitions from a static fixed gamma table to a dynamic adaptive gamma table that changes according to the display panel's operating temperature, thereby maintaining color accuracy across varying thermal conditions
Solution Approach 2:
The system changes the gamma table parameter based on temperature conditions. Multiple pre-calibrated gamma tables are stored in memory, and the system selects the appropriate gamma table by matching the current temperature range, thus adjusting the display parameters to compensate for temperature-induced color shifts
2Stability of the object's composition
If temperature compensation is implemented, then color stability is improved, but the system complexity increases
Solution Approach 1:
The patent performs preliminary temperature compensation by pre-calibrating multiple gamma tables at different temperature conditions during manufacturing. This preliminary action eliminates the need for complex real-time calculations during operation, as the system only needs to sense temperature and select the pre-prepared gamma table
Solution Approach 2:
The system replaces complex mechanical or computational temperature compensation mechanisms with a simplified lookup-based approach. Instead of calculating compensation values in real-time, the system substitutes this with a straightforward temperature-to-gamma-table mapping process
3Measurement precision
If real-time temperature sensing and dynamic gamma table selection are implemented, then color shift compensation accuracy is improved, but the processing time and energy consumption increase
Solution Approach 1:
The system performs preliminary organization of gamma tables according to temperature ranges during manufacturing. This preliminary sorting allows for rapid retrieval during operation, minimizing the time needed to select the appropriate gamma table once temperature is sensed
Solution Approach 2:
The implementation uses dynamic temperature sensing combined with a pre-organized gamma table structure. The system continuously monitors temperature and dynamically switches between pre-prepared gamma tables, achieving real-time compensation without extensive processing
Data Source
AI summary
Color shift compensation method of display panel and display device are provided. The display panel includes a plurality of display pixels arranged in rows and columns The method includes acquiring initial display parameters of a plurality of display pixels and an ambient temperature of the display panel; determining an actual temperature of the display panel according to the initial display parameters of the plurality of display pixels and the ambient temperature of the display panel; determining a compensation gamma table of the display panel according to the actual temperature of the display panel; and providing compensation data signals to the plurality of the display pixels according to the compensation gamma table.