Chroma Compensation for RGBW OLED Displays
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Solution Overview
Problem
Current RGBW OLED display devices face challenges in achieving precise chroma compensation across varying luminance levels, leading to suboptimal color accuracy and flexibility in different application scenarios.
Innovation Solution
A method and apparatus for chroma compensation that involves determining complementary color gains for each sub-pixel based on target and initial colors, using substitution proportions and relative color coordinates, and establishing corresponding relationships between luminance and color gains to adjust drive output signals for accurate chrominance compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If chroma compensation is performed using conventional methods, then the display device can achieve basic color compensation, but the color accuracy deteriorates under varying luminance levels
Solution Approach 1:
The patent applies dynamics by making the chroma compensation parameters adaptive rather than fixed. The complementary color gain values are dynamically adjusted based on the luminance level of the target pixel unit, allowing the system to optimize color accuracy for each specific luminance condition. This resolves the contradiction by enabling the display to maintain high color accuracy across varying luminance levels through real-time parameter adjustment.
Solution Approach 2:
The patent changes the parameter of complementary color gain based on luminance conditions. By establishing corresponding relationships between luminance and complementary color gain, and selecting appropriate gain values from multiple pre-calculated sets, the system optimizes color compensation parameters for different luminance levels, thereby improving both color accuracy and adaptability.
2Measurement precision
If chroma compensation is performed without considering luminance variations, then the compensation process is simple, but the color accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing complementary color gain values for multiple luminance levels in advance. These pre-computed values are organized in lookup tables or corresponding relationships, allowing the system to quickly retrieve the appropriate compensation parameters during actual display operation without performing complex real-time calculations, thus improving color accuracy while controlling process complexity.
Solution Approach 2:
The patent uses copying by creating multiple copies of compensation parameters corresponding to different luminance levels. Instead of using a single compensation formula, the system maintains multiple sets of complementary color gain values that can be copied and applied as needed, enabling accurate color compensation across various luminance conditions without excessive computational complexity.
3Adaptability or versatility
If the display device uses fixed chroma compensation parameters, then the device complexity is low, but the adaptability to different application scenarios deteriorates
Solution Approach 1:
The patent applies parameter changes by establishing a system where chroma compensation parameters are selected based on the luminance characteristics of the target pixel unit. The corresponding relationships between luminance and complementary color gain enable the system to automatically adjust parameters for different application scenarios (e.g., bright outdoor display vs. dark indoor display), significantly improving adaptability while maintaining manageable device complexity through structured parameter organization.
Data Source
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AI summary
The present disclosure, belonging to the field of display technologies, provides a chroma compensation method and apparatus, a display device and a storage medium. The method includes: acquiring an initial color of a display sub-pixel in a target pixel unit under a target luminance, and a target color of the target pixel unit under the target luminance, the target pixel unit including: at least two display sub-pixels of different light colors; acquiring a complementary color gain of each of the display sub-pixels under the target luminance based on the target color and the initial color of each of the display sub-pixels; and compensating for chrominance of the target pixel unit based on the complementary color gain of each of the display sub-pixels under the target luminance. The present disclosure improves the display flexibility of a display panel.