Organic Light Emitting Display Non-Symmetric Pixel Arrangement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-resolution organic light emitting displays face challenges in maintaining a high aperture ratio due to reduced pixel size, leading to deteriorated design freedom and emission region area utilization, as symmetrically arranged emission regions occupy only partial usable areas and reduce the aperture ratio.
Innovation Solution
The blue and red emission regions are non-symmetrically arranged in organic light emitting displays, with specific configurations such as positioning blue emission regions at upper and lower sides of corresponding pixels in alternating horizontal lines, and red emission regions at upper and lower sides in corresponding pixels, allowing for increased design freedom and aperture ratio by maximizing the space used for emission regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If emission regions are symmetrically arranged in pixels, then manufacturing precision is improved, but aperture ratio deteriorates
Solution Approach 1:
The patent applies asymmetry by arranging emission regions of different colors (red, green, blue) at different vertical positions within pixels. Specifically, red emission regions are positioned in the lower portion, green emission regions in the upper portion, and blue emission regions alternating between upper and lower portions in adjacent horizontal lines. This asymmetric arrangement maximizes the utilization of the emission region formation area, thereby improving the aperture ratio while maintaining manufacturing precision through controlled positional variation.
2Measurement precision
If pixel size is reduced to increase resolution, then resolution is improved, but aperture ratio deteriorates
Solution Approach 1:
The patent applies local quality by optimizing the emission region arrangement specifically within each pixel area. By positioning different colored emission regions at different vertical positions (red in lower portion, green in upper portion, blue alternating), the patent maximizes the effective emission area within the constrained pixel size, thereby maintaining high aperture ratio even at high resolutions of 400 ppi or more.
3Manufacturing precision
If emission regions are arranged at uniform intervals, then manufacturing precision is improved, but design freedom deteriorates
Solution Approach 1:
The patent applies dynamics by introducing variable vertical positioning of emission regions based on horizontal line position. While emission regions within the same horizontal line maintain uniform horizontal spacing, the vertical position alternates between upper and lower portions for blue emission regions in adjacent horizontal lines. This dynamic arrangement provides design flexibility while maintaining manufacturing precision through controlled positional variation.
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
There is provided an organic light emitting display capable of increasing an aperture ratio. The organic light emitting display includes red pixels including red emission regions, green pixels including green emission regions, and blue pixels including blue emission regions. In at least one of the red emission regions, the green emission regions, and the blue emission regions, a distance between an emission region and an adjacent emission region above the emission region is different from a distance between the emission region and another adjacent emission region below the emission region.