Trapezoid Pixel Array Layout for Higher Aperture OLED Displays
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Solution Overview
Problem
Current OLED display devices face challenges in achieving optimal pixel arrangement and aperture ratio, leading to subpar display quality and efficiency.
Innovation Solution
The proposed pixel array configuration includes a specific arrangement of sub-pixels, where first and third sub-pixels are alternately arranged to form pixel groups, and second sub-pixels are positioned to optimize the virtual polygon structure, enhancing the aperture ratio and display efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional pixel arrangements are used, then manufacturing process is simple, but display fineness and aperture ratio are subpar
Solution Approach 1:
The pixel array is divided into multiple pixel groups, with each group containing sub-pixels of different types (first, second, and third sub-pixels) arranged in specific patterns. This segmentation allows for optimized local aperture ratios while maintaining overall manufacturing feasibility through modular repetition of the pixel group structure.
Solution Approach 2:
The patent employs asymmetric pixel arrangements where first and third sub-pixels are alternately arranged to form pixel groups, and second sub-pixels are positioned to create virtual polygons with specific geometric relationships. This asymmetric design optimizes light emission efficiency and aperture ratio while the repeating pattern maintains manufacturing simplicity.
2Productivity
If sub-pixel sizes and arrangements are optimized for aperture ratio, then display efficiency improves, but manufacturing precision requirements increase
Solution Approach 1:
Different sub-pixel types (first, second, third sub-pixels) are assigned different sizes and positions within pixel groups to optimize local aperture ratios. The first and third sub-pixels are alternately arranged with specific virtual center relationships, while second sub-pixels are positioned to form virtual polygons, creating locally optimized display efficiency that can be manufactured using standard precision processes.
3Reliability
If complex virtual polygon structures are implemented, then edge jaggy feeling and display graininess are reduced, but device complexity increases
Solution Approach 1:
The patent creates virtual polygons by establishing specific geometric relationships between sub-pixel virtual centers without physically forming polygon structures. Lines connecting virtual centers form virtual isosceles trapezoids and other virtual polygons, which reduce edge jaggy effects and display graininess while maintaining simple physical sub-pixel arrangements that are easy to manufacture.
Data Source
AI summary
The disclosure provides a pixel array and a display device. The pixel array includes a plurality of sub-pixels, each of which has a virtual pixel center, the plurality of sub-pixels include first sub-pixels, second sub-pixels, and third sub-pixels; virtual centers of two first sub-pixels and two third sub-pixels are sequentially connected to form a second virtual quadrangle; a first virtual polygon includes four second virtual quadrangles in an array and sharing adjacent sides; and the first sub-pixels and the third sub-pixels are at vertex angles or sides of the first virtual polygon and are alternately on the vertex angles or the sides of the first virtual polygon along a clockwise direction; the first virtual polygon has a first virtual point therein, lines connecting the first virtual point and virtual centers of the four third sub-pixels on the first virtual polygon divide the first virtual polygon into four virtual isosceles trapezoids.