Display Panel Compensation Values for Color Cast With Lower Data Load
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Solution Overview
Problem
Conventional display terminals face challenges in simultaneously addressing color cast in displayed images and reducing storage costs due to the high data requirements for chroma compensation, which is several times that of brightness compensation.
Innovation Solution
A compensation value generation method that determines the existence of color cast in display panels using optical messages, applying different compensation methods based on the presence or absence of color cast, thereby generating distinct compensation values to mitigate color cast while minimizing storage costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If chroma compensation is performed on the display panel, then the color uniformity is improved, but the storage cost increases due to several times more data requirements compared to brightness compensation
Solution Approach 1:
The patent changes the parameter of compensation data precision by using 8-bit compensation values instead of full-color compensation data. This reduces the data amount from several times that of brightness compensation to a manageable level while still achieving effective color cast correction through the use of lookup tables and grayscale-based compensation.
Solution Approach 2:
The patent segments the color compensation process into brightness compensation and color cast correction stages. By first performing brightness compensation and then applying targeted color cast correction only where needed, the system achieves color uniformity improvement without requiring full chroma compensation data for all pixels, thus reducing overall data storage requirements.
2Manufacturing precision
If brightness compensation or chroma compensation is performed during manufacturing, then the image uniformity is improved, but the color cast phenomenon becomes more severe or storage costs increase
Solution Approach 1:
The patent implements feedback by detecting the actual color cast condition of the display panel and using this information to generate appropriate compensation values. The system measures the color cast characteristics and adjusts the compensation parameters accordingly, ensuring that compensation is applied only where color cast exists and to the appropriate degree, thereby avoiding exacerbation of color cast while improving image uniformity.
Solution Approach 2:
The patent applies local quality by performing compensation operations selectively on different regions of the display panel based on their specific characteristics. Instead of applying uniform compensation across the entire panel, the system identifies regions with color cast issues and applies targeted compensation only to those areas, preventing over-compensation and color cast exacerbation in regions that already have good uniformity.
Data Source
AI summary
The present invention provides a compensation value generation method, an apparatus thereof, and a display panel thereof. The method includes: obtaining at least one optical message of a display panel under at least one tie point grayscale, and determining whether color cast exists the display panel under the tie point grayscale according to optical message, when color cast exists, adopting a first compensation method to compensate the tie point grayscale to obtain a first compensation value, when no color cast exists, then adopting a second compensation method to compensate the tie point grayscale to obtain a second compensation value. Also, a data amount of the second compensation value is different from a data amount of the first compensation value to mitigate the color cast of the display image while lowering the storage cost.