Display Panel Gray-Scale Determination via Slope Fitting
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Solution Overview
Problem
Current methods for determining gray-scale values in display panels are inefficient due to complex calculations and large amounts of compensation data, leading to high computational costs and storage pressures.
Innovation Solution
A method that fits brightness values across multiple gray scales to obtain a target slope value and deviation value, allowing for the determination of a reference brightness value and subsequent output gray-scale value for each pixel, using formulas such as f(ref)=aX+b and log(Li/L255)=a*log(Grayi/255)+b, which simplifies the calculation process and reduces storage requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the gray-scale value is calculated according to gamma value and target brightness value using complex formulas, then the brightness accuracy is improved, but the calculation efficiency deteriorates
Solution Approach 1:
The patent performs preliminary fitting of brightness values across multiple gray scales to obtain slope and deviation values in advance. This preprocessing step creates a simplified linear relationship that can be quickly applied during actual gray-scale determination, eliminating the need for complex gamma calculations at runtime while maintaining brightness accuracy
Solution Approach 2:
The patent transforms the traditional gamma-based non-linear calculation into a linear parameter model using slope and deviation values. By changing from gamma value parameters to linear fitting parameters, the calculation becomes significantly simpler while preserving the essential brightness characteristics needed for accurate gray-scale determination
2Stability of the object's composition
If Mura correction technology is implemented with large amount of compensation data, then the brightness uniformity is improved, but the storage pressure deteriorates
Solution Approach 1:
The patent reduces the compensation data from complex per-pixel gamma values and brightness measurements to simple linear parameters (slope and deviation values) that can be stored efficiently. This parameter transformation maintains the ability to correct brightness non-uniformity while dramatically reducing the storage requirements for compensation data
Solution Approach 2:
The patent extracts only the essential characteristics needed for Mura correction by fitting brightness values to obtain slope and deviation values. This extraction process removes redundant information while retaining the core parameters necessary for brightness uniformity correction, thereby reducing storage pressure
Data Source
AI summary
Disclosed are a method and device for determining a gray-scale value of a display panel. The method includes that: brightness values corresponding to multiple gray scales under a target area of a display panel are fitted to obtain a target slope value and a target deviation value; a reference brightness value under a target gray scale of the display panel is determined according to the target slope value and the target deviation value; and an output gray-scale value corresponding to each pixel under the target gray scale is determined according to the reference brightness value.