Parallelogram Sub-pixel Arrangement for Display Resolution
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Solution Overview
Problem
Conventional RGBW display panels suffer from low resolution and sharpness due to larger pixel units, resulting in a fuzzy screen, despite improved transmittance from the added white sub-pixel.
Innovation Solution
A display panel with a pseudo dual-domain pixel structure, featuring sub-pixels arranged in a parallelogram shape with alternating incline directions, reducing the area of the white sub-pixel and increasing the aperture ratio of colored sub-pixels, thereby enhancing resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a white sub-pixel is added to create an RGBW pixel unit, then transmittance is improved, but the pixel unit area increases causing low resolution
Solution Approach 1:
The patent transforms the conventional rectangular sub-pixel arrangement into a parallelogram-shaped arrangement with alternating incline directions. This dimensional transformation allows pixel units to be packed more efficiently, reducing the overall pixel unit area while maintaining the RGBW four-sub-pixel structure, thereby resolving the contradiction between transmittance improvement and resolution degradation
Solution Approach 2:
The patent introduces asymmetry by making adjacent pixel units have different incline directions (odd rows vs. even rows). This asymmetric arrangement optimizes light transmission paths and reduces color shift while maintaining high resolution, allowing the white sub-pixel to contribute to transmittance without excessively increasing pixel unit area
2Manufacturing precision
If the sub-pixel arrangement is changed to pseudo dual-domain structure, then resolution is improved, but color shift may increase
Solution Approach 1:
The patent applies local quality by making odd-row pixel units have one incline direction while even-row pixel units have the opposite incline direction. This local differentiation optimizes light transmission in different regions, improving resolution while the alternating pattern compensates for color shift through balanced optical paths
Solution Approach 2:
The patent converts the potential harm of color shift into a benefit by using the parallelogram shape with alternating incline directions. The slanted edges of the parallelogram sub-pixels help to reduce color shift by optimizing light transmission angles, thereby transforming what could be a disadvantage into an advantage for both resolution and color accuracy
Data Source
AI summary
A display panel and a display device are provided. A pixel unit array thereof includes multiple pixel units, the pixel unit includes three parallelogram sub-pixels, each being a first, a second, a third or a fourth color sub-pixel. In any two adjacent pixel units, one sub-pixel in a pixel unit is different in color from one sub-pixel in the other pixel unit, and the other two sub-pixels are the same in color as those in the other pixel unit respectively. Any sub-pixel in an odd row has an opposite incline direction in the row direction to a sub-pixel in an adjacent even row and in a same column with the sub-pixel in the odd row. The sub-pixels in different odd rows have a same incline angle in the row direction, and the sub-pixels in different even rows have a same incline angle in the row direction.