AMOLED Grayscale Mapping for Open Pixel Ratio Gamma Correction
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Solution Overview
Problem
Active-matrix organic light-emitting diode (AMOLED) displays face issues with gamma value deviations due to varying Open Pixel Ratios (OPRs), leading to inconsistent brightness and potential eye fatigue, as the gamma output of each pixel does not consistently adhere to the standard 2.2 value, especially when the pixel display ratio deviates from maximum brightness.
Innovation Solution
A method and apparatus for determining the Open Pixel Ratio (OPR) corresponding to an image, acquiring a preset relationship between original and target grayscale values, and converting each pixel's original grayscale value to a target value to maintain consistent display brightness, ensuring the gamma output aligns with the standard 2.2 value under varying OPRs without requiring additional hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pixel display ratio deviates from maximum brightness, then the gamma output of each pixel does not consistently adhere to the standard 2.2 value, but the display brightness becomes inconsistent and causes eye fatigue
Solution Approach 1:
The patent pre-calculates and stores grayscale mapping information for various OPR values before actual display. When displaying, the system only needs to query the pre-computed mapping table based on current OPR, avoiding real-time complex calculations and ensuring consistent gamma output without additional hardware.
Solution Approach 2:
The patent changes the grayscale values of pixels based on the calculated OPR to compensate for gamma deviations. By adjusting the grayscale parameters dynamically according to OPR, the system maintains standard gamma 2.2 output characteristics across different display ratios without modifying the physical display hardware.
2Reliability
If grayscale values are adjusted to maintain standard gamma output under varying OPRs, then brightness consistency is improved, but calculation complexity increases
Solution Approach 1:
The patent pre-calculates and stores grayscale mapping information for various OPR values before actual display. When displaying, the system only needs to query the pre-computed mapping table based on current OPR, avoiding real-time complex calculations and ensuring consistent gamma output without additional hardware.
Solution Approach 2:
The patent creates a mapping table that copies and stores the relationship between OPR values and corresponding grayscale adjustments. This pre-computed lookup table replaces complex real-time calculations, reducing processing complexity while maintaining accuracy in brightness consistency.
3Manufacturing precision
If real-time grayscale conversion is performed for each pixel, then display accuracy is improved, but processing time increases
Solution Approach 1:
The patent pre-calculates and stores grayscale mapping information for various OPR values before actual display. When displaying, the system only needs to query the pre-computed mapping table based on current OPR, avoiding real-time complex calculations and ensuring consistent gamma output without additional hardware.
Solution Approach 2:
The patent creates a mapping table that copies and stores the relationship between OPR values and corresponding grayscale adjustments. This pre-computed lookup table replaces complex real-time calculations, reducing processing complexity while maintaining accuracy in brightness consistency.
Data Source
AI summary
A display method for generating grayscale mapping information can be applied to a terminal device, and include: determining an Open Pixel Ratio (OPR) corresponding to an image to be displayed; acquiring a preset corresponding relationship between an original grayscale value and a target grayscale value under the OPR; sequentially converting the original grayscale value corresponding to each pixel of the image to be displayed into the corresponding target grayscale value according to the corresponding relationship; and displaying the image to be displayed according to the target grayscale value corresponding to each pixel obtained by the conversion.