Display Device Color Controller Viewing Angle Compensation
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Solution Overview
Problem
Display devices using red, green, and blue light-emitting elements experience color variation when viewed from different angles, leading to reduced viewing angles and color distortion during color gamut conversion.
Innovation Solution
A display device and driving method that includes a color controller to perform color gamut conversion using a look-up table and primary-color-viewing-angle data to adjust image data, ensuring minimal hue variation and maintaining optimal viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If color gamut conversion is performed to reduce color gamut, then color accuracy at front viewing angle is improved, but viewing angle for specific colors decreases
Solution Approach 1:
The patent applies different color compensation strategies to different color channels (R, G, B) based on their specific viewing angle characteristics. Each primary color undergoes independent gamma correction with customized compensation curves, allowing localized optimization of color accuracy for each color while maintaining overall viewing angle performance.
Solution Approach 2:
The patent dynamically adjusts gamma correction parameters and color compensation values based on viewing angle conditions. By changing the compensation parameters selectively for each primary color channel, the system maintains color accuracy across different viewing angles without requiring full color gamut reduction.
2Manufacturing precision
If color compensation is implemented through color mapping, then color gamut is reduced, but viewing angle for specific color may be decreased
Solution Approach 1:
The patent pre-calculates and stores compensation lookup tables (LUTs) for each primary color channel before actual display operation. These pre-computed compensation values are based on measured viewing angle characteristics, allowing the system to apply corrections in advance without real-time computation delays, thus maintaining both color gamut control and viewing angle performance.
Solution Approach 2:
The patent introduces gamma correction as an intermediary processing step between color gamut conversion and final display output. This intermediate gamma adjustment acts as a mediator that balances color gamut reduction with viewing angle maintenance, allowing smooth transition and compensation for color shifts that occur during gamut conversion.
3Stability of the object's composition
If image data is adjusted to maintain viewing angle, then color consistency across viewing positions is improved, but processing complexity increases
Solution Approach 1:
The patent creates simplified compensation lookup tables that store pre-calculated correction values for each primary color channel. Instead of performing complex real-time calculations, the system copies and applies these pre-computed values from the LUTs, significantly reducing processing complexity while maintaining color consistency across different viewing positions.
Solution Approach 2:
The patent divides the color compensation process into separate independent channels for each primary color (R, G, B). By segmenting the compensation task into three independent gamma correction processes rather than one complex full-color process, the system reduces overall processing complexity while achieving comprehensive color consistency across the viewing angle range.
Data Source
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AI summary
A display device and a driving method thereof. The display device includes a color controller configured to generate second image data by converting the color gamut of first image data received from the outside and to generate third image data by correcting the first image data or the second image data depending on the viewing angle variation between the first image data and the second image data, and a display panel configured to display an image based on the second image data or the third image data.