Image Display Device Sub-Pixel Color Gamut Extension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional image display devices experience a decrease in apparent resolution due to an increase in the number of sub-pixels per pixel, as the area used for color extension increases, leading to inefficient use of sub-pixels.
Innovation Solution
An image display device comprising first and second pixels with sub-pixels of different color gamuts, where the output of sub-pixels is determined based on combined and out-of-color gamut components of the input image signal, with the processing unit adjusting outputs to maintain high resolution by optimizing sub-pixel lighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of sub-pixels per pixel is increased to improve color extension capability, then color gamut coverage is improved, but apparent resolution is lowered
Solution Approach 1:
The pixel is divided into multiple sub-pixels with different color functions (red, green, blue, and white sub-pixels). The white sub-pixel is specifically used for color extension purposes, while the colored sub-pixels maintain high resolution display. This segmentation allows the system to extend color gamut without compromising the resolution provided by the colored sub-pixels.
Solution Approach 2:
The white sub-pixel serves multiple functions: it can be used for brightness enhancement, color extension to complementary colors (cyan, magenta, yellow), and can work in combination with colored sub-pixels to achieve various color outputs. This multi-functionality allows the display to extend color gamut while maintaining high resolution through the colored sub-pixels.
2Adaptability or versatility
If more sub-pixels are used for color extension, then color gamut is extended, but the area available for high resolution display is reduced
Solution Approach 1:
Different sub-pixels are assigned different roles based on their color characteristics. The white sub-pixel is specifically designated for color extension functions, while the red, green, and blue sub-pixels are optimized for high resolution color display. This local quality differentiation ensures that color extension does not encroach on the area needed for high resolution display.
Solution Approach 2:
The patent introduces a fourth color dimension (white) in addition to the traditional RGB three-color system. This additional dimension provides extra degrees of freedom for color extension without requiring more area in the traditional color space, thereby extending color gamut while preserving high resolution display area.
3Manufacturing precision
If sub-pixels of different colors are lit simultaneously for color extension, then color accuracy is improved, but power consumption increases
Solution Approach 1:
The display system dynamically selects which sub-pixels to activate based on the specific color extension requirements. The control unit determines the optimal combination of sub-pixels to light based on the input image signal characteristics, allowing the system to achieve accurate color extension while minimizing the number of active sub-pixels and thus reducing power consumption.
Solution Approach 2:
The system changes the operational parameters of different sub-pixel types based on the display requirements. For color extension to complementary colors, the white sub-pixel is activated in combination with specific colored sub-pixels. The brightness and activation state of each sub-pixel are dynamically adjusted to achieve accurate color reproduction with optimized power consumption.
Data Source
AI summary
An image display device includes an image display unit including first pixels including sub-pixels of three or more colors in a first color gamut, and second pixels including sub-pixels of three or more colors in a second color gamut different from the first color gamut; a processing unit that determines an output of the sub-pixels of the first pixel based on a combined component of a first component and an out-of-color gamut component, and determines an output of the sub-pixels of the second pixel based on a third component by eliminating the out-of-color gamut component from a second component; and a determination unit that determines whether the input image signal corresponds to an edge of an image. When the input image signal corresponds to the edge of the image, the processing unit causes the out-of-color gamut component not to be reflected in an output of the first pixel.