Display Brightness Compensation Using Temperature-Grayscale Regression
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Solution Overview
Problem
Conventional brightness compensation methods for silicon-based OLED display screens suffer from low accuracy and large errors due to the significant temperature difference between the display screen and the environment, affecting display brightness and quality.
Innovation Solution
A method involving obtaining a sample data set, performing linear regression processing to generate a regression coefficient set, and using this set to determine a brightness compensation parameter to adjust display screen brightness based on actual temperature and grayscale values, thereby compensating for temperature-induced brightness fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional brightness compensation methods use environment temperature for compensation, then the compensation process is simple, but the compensation accuracy is low due to significant temperature difference between display screen and environment
Solution Approach 1:
The patent introduces an intermediary computational model (regression equation with multiple parameters) that mediates between the simple environment temperature measurement and the complex actual display screen temperature compensation. This model uses environment temperature, grayscale values, and resolution as inputs to calculate a compensated temperature that accurately reflects the actual display screen temperature, thereby achieving high compensation accuracy without directly measuring the difficult-to-access display screen temperature.
Solution Approach 2:
The patent transforms the single parameter (environment temperature) into multiple parameters (environment temperature, grayscale values, resolution) in the compensation model. By changing from a single-parameter compensation approach to a multi-parameter model, the system captures the complex relationship between display content, resolution, and temperature, significantly improving compensation accuracy while maintaining computational feasibility.
2Illumination intensity
If the display screen operates at high brightness, then the display quality is improved, but the temperature difference between display screen and environment increases causing larger brightness errors
Solution Approach 1:
The patent implements a feedback mechanism by continuously monitoring the grayscale values being displayed and using this information in the compensation calculation. The system feeds back the actual display content information (grayscale) to the compensation model, which then adjusts the temperature compensation accordingly. This closed-loop approach ensures that high brightness operation does not lead to increased errors, as the compensation adapts to the actual display conditions.
Solution Approach 2:
The patent incorporates grayscale values as a dynamic parameter in the compensation model. When brightness changes, the grayscale parameter changes accordingly, allowing the compensation calculation to adapt to different brightness levels. This parameter change approach enables accurate compensation across the full brightness range, preventing the deterioration of brightness accuracy even at high illumination intensities.
Data Source
AI summary
A processing method of a display screen brightness compensation includes: obtaining a sample data set of the display screen, a real environment temperature and a real image average grayscale value corresponding to the real environment temperature, the sample data set including an environment temperature sample set, a image average grayscale sample set corresponding to the environment temperature sample set and a simulated temperature sample set; performing a linear regression processing on the sample data set to generate a regression coefficient set; processing the real environment temperature and the real image average grayscale value according to the regression coefficient set to generate a temperature to be compensated of the display screen; and determining a brightness compensation parameter according to the temperature to be compensated, and performing a brightness compensation processing on the display screen according to the brightness compensation parameter.