Display Device Sub-Pixel Arrangement for Pattern Suppression
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Solution Overview
Problem
Conventional display devices with pixels having two sub-pixels can produce unwanted patterns not included in the input image, such as bright-and-dark or colored patterns, due to the arrangement and allocation of sub-pixels.
Innovation Solution
A display device with pixels arranged in a row-column configuration, where each pixel includes two sub-pixels with different colors, and the colors and positional relations are consistent in one direction, with one color allocated to adjacent pixels in the other direction, preventing the formation of unwanted patterns by ensuring sub-pixels with the same color are not adjacent in the primary direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sub-pixels are arranged with two colors per pixel in conventional display devices, then device complexity is reduced, but unwanted patterns (bright-and-dark or colored patterns) appear in the display output
Solution Approach 1:
The patent applies local quality by making the sub-pixel composition vary across different pixels. Specifically, different pixels contain different combinations of sub-pixels (e.g., some pixels have R and G sub-pixels, others have G and B, others have B and R), creating local variations in color distribution that prevent the formation of regular unwanted patterns while maintaining overall color balance.
Solution Approach 2:
The patent employs asymmetry by breaking the symmetric repetition of identical sub-pixel pairs in adjacent pixels. Instead of repeating the same two sub-pixel colors in every pixel, the arrangement uses asymmetric variations where neighboring pixels have different sub-pixel color combinations, disrupting the periodicity that causes moiré patterns and other display artifacts.
2Ease of manufacture
If sub-pixels with the same color are arranged adjacent to each other, then manufacturing is simplified, but colored patterns not included in the input image become visible
Solution Approach 1:
The patent implements local quality by ensuring that within each pixel, the two sub-pixels have different colors, creating local color variation. This prevents large areas of the same color from forming, thereby eliminating colored patterns while maintaining manageable manufacturing complexity through a regularized variation pattern.
3Device complexity
If conventional sub-pixel allocation is used, then display device structure is simplified, but bright-and-dark patterns appear in the display output
Solution Approach 1:
The patent applies local quality by varying the sub-pixel color composition in different pixels rather than using a uniform allocation. This creates local differences in light emission characteristics that disrupt the formation of bright-and-dark patterns while maintaining overall display performance and color accuracy.
Solution Approach 2:
The patent uses asymmetry in the sub-pixel allocation scheme where adjacent pixels do not have identical sub-pixel color pairs. This asymmetric distribution breaks the periodic patterns that cause bright-and-dark artifacts, achieving pattern suppression without significantly increasing device complexity.
Data Source
AI summary
According to an aspect, a display device includes a plurality of pixels. Each pixel includes two sub-pixels adjacent to each other in a first direction. Each sub-pixel has one of three colors allocated thereto. Two colors of the two sub-pixels included in the pixel are different. The two colors of the two sub-pixels and a positional relation between the two sub-pixels are the same in each of the pixels arrayed in a second direction. One color not allocated to the two sub-pixels included in a first pixel out of the three colors is allocated to at least one of the sub-pixels included in second pixels adjacent to the first pixel in the first direction. The sub-pixels having the same color allocated thereto are arranged along the first direction with one sub-pixel interposed therebetween, the one sub-pixel having another color allocated thereto.