Display Pixel Segmentation for Luminance and Color Reproducibility
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Solution Overview
Problem
Existing liquid crystal display devices face challenges in enhancing display luminance while maintaining color reproducibility, as enlarging the white pixel area compromises the size of red, green, and blue pixels, leading to deteriorated color reproducibility and a rough image appearance.
Innovation Solution
The display device employs a configuration of six color pixels per unit pixel, with four pixels of equal size, one pixel of larger size for blue, and one pixel of smaller size for white, allowing for flexible setting of pixel sizes to optimize color reproducibility and luminance, and reducing power consumption by substituting white pixel luminance with the combined luminance of red and blue pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the area of the white pixel is enlarged to enhance display luminance, then the display luminance is improved, but the area of the red, green, and blue pixels is reduced, causing color reproducibility to deteriorate
Solution Approach 1:
The unit pixel is segmented into six color pixels (R1, G1, B1, R2, G2, B2) instead of the conventional four pixels (R, G, B, W). This segmentation eliminates the need for a white pixel while providing multiple sub-pixels of each primary color, allowing for flexible area allocation that maintains color reproducibility while achieving high display luminance through optimized light transmission.
Solution Approach 2:
Different sub-pixels within the unit pixel are assigned different areas based on their specific color and position. The red sub-pixels (R1, R2) are given larger areas to enhance red luminance contribution, while green (G1, G2) and blue (B1, B2) sub-pixels have appropriately sized areas to maintain their respective color outputs. This local optimization of pixel areas ensures that each color component contributes optimally to the overall display luminance without compromising color accuracy.
2Illumination intensity
If the white pixel area is increased to improve display luminance, then the luminance is enhanced, but the image quality deteriorates as the white pixel becomes visually recognizable and the image appears rough
Solution Approach 1:
By dividing the unit pixel into six color pixels without a white pixel, the invention eliminates the visual recognition issue associated with large white pixels. The segmentation into multiple small sub-pixels of equal or similar sizes ensures uniform light distribution across the pixel array, preventing any single pixel from dominating the visual output and causing a rough appearance, while still achieving high overall luminance through the combined contribution of all sub-pixels.
3Illumination intensity
If the area of red, green, and blue pixels is reduced to accommodate a larger white pixel, then display luminance is improved, but the color reproducibility deteriorates due to insufficient area for each color pixel
Solution Approach 1:
The invention segments the unit pixel into six color pixels (R1, G1, B1, R2, G2, B2), eliminating the white pixel and providing multiple sub-pixels for each primary color. This segmentation ensures that each color component has sufficient total area (sum of areas of its sub-pixels) to maintain color reproducibility, while the overall pixel density and light transmission efficiency are optimized to achieve high display luminance without sacrificing color accuracy.
Data Source
AI summary
A display device includes a first color pixel, a second color pixel neighboring the first color pixel in a first direction, a third color pixel neighboring the second color pixel in the first direction, a fourth color pixel neighboring the first color pixel in a second direction, a fifth color pixel neighboring the second color pixel in the second direction, and a sixth color pixel neighboring the third color pixel in the second direction, wherein each of the first color pixel, the second color pixel, the fourth color pixel and the fifth color pixel has a first long-side length, the third color pixel has a second long-side length which is greater than the first long-side length, and the sixth color pixel has a third long-side length which is less than the first long-side length.