Display Color Shifter for Precise Gamut Control
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Solution Overview
Problem
Current display devices lack an efficient method to control color gamut using minimal information, which is essential for adjusting color settings to affect user mood and mental state effectively.
Innovation Solution
A display device and driving method that utilize a color shifter with an offset storage unit, color gamut determination unit, gamma application unit, and inverse gamma application unit to convert input grayscale values into output grayscale values based on determined color gamut information, adjusting the color gamut by selecting appropriate offset information and applying gamma curves to achieve desired color ratios for blue and red areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If color gamut control is implemented using detailed color shift level information, then color gamut control precision is improved, but device complexity and information processing requirements increase
Solution Approach 1:
The patent extracts only the essential information needed for color gamut control by determining whether to use first or second offset information based on whether the color shift level is positive or negative. This selective extraction approach reduces information processing complexity while maintaining precise color gamut control capability.
Solution Approach 2:
The patent uses inverted offset information (second offset information) when the color shift level is negative, rather than using the same offset information as when the level is positive. This inversion strategy enables precise color gamut control in both directions while simplifying the overall control mechanism.
2Adaptability or versatility
If multiple offset information types are stored and processed, then color gamut adjustment flexibility is improved, but memory requirements and processing load increase
Solution Approach 1:
The patent dynamically selects between first offset information and second offset information based on the sign of the color shift level. This dynamic selection enables flexible color gamut adjustment for different scenarios while minimizing the quantity of stored information by only keeping one type of offset information in memory.
Solution Approach 2:
The patent pre-determines which offset information to use based on the color shift level sign before performing color gamut conversion. This preliminary determination simplifies the processing flow and reduces real-time computational load while maintaining adjustment flexibility.
3Measurement precision
If gamma curves are applied to adjust color ratios, then color gamut control precision is improved, but calculation time increases
Solution Approach 1:
The patent applies gamma curves as a parameter transformation method to adjust color ratios efficiently. By using gamma correction with predetermined values, the system achieves precise color ratio control while minimizing calculation time compared to more complex color space transformations.
Data Source
AI summary
A display device and driving method thereof are disclosed. The display device includes a pixel emitting light at a luminance corresponding to an output grayscale value and a color shifter for converting an input grayscale value into the output grayscale value based on output color gamut information. The color shifter includes an offset storage unit storing reference color gamut information and offset information; and a color gamut determination unit that determines the output color gamut information using the reference color gamut information and the offset information when the color shift level corresponds to a value between the reference level and the shift levels, and determines tire output color gamut information using second offset information in which the offset information is inverted and the reference color gamut information when the color shift level is not between the reference level and the shift levels.