OLED Pixel Layout for Aperture Ratio and Deposition Reliability
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Solution Overview
Problem
Existing OLED display technologies face challenges in achieving a high aperture ratio while maintaining deposition reliability, as reducing the gap between pixels improves deposition reliability but deteriorates the aperture ratio, and increasing the gap improves the aperture ratio but compromises deposition reliability.
Innovation Solution
A pixel arrangement structure for OLED displays is introduced, where first pixels are positioned at the center of a virtual square, and second and third pixels are placed at the vertices, forming a polygonal shape with equal distances between them, allowing for improved aperture ratio and deposition reliability while efficiently setting up pixel gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the gap between neighboring pixels is reduced to obtain a high aperture ratio, then the aperture ratio is improved, but deposition reliability is deteriorated
Solution Approach 1:
The patent applies asymmetry by positioning pixels at non-uniform intervals along the gate line direction. Specifically, the distance between adjacent pixels in the same column is set to be different from the distance between pixels in adjacent columns, creating an asymmetric pixel arrangement that optimizes both aperture ratio and deposition reliability
Solution Approach 2:
The patent transitions from a one-dimensional uniform spacing approach to a two-dimensional asymmetric spacing arrangement. By considering both the gate line direction and the direction perpendicular to it, the patent optimizes pixel positions in multiple dimensions to simultaneously achieve high aperture ratio and reliable organic layer deposition
2Reliability
If the gap between pixels is increased to improve deposition reliability, then deposition reliability is improved, but the aperture ratio of the pixel is deteriorated
Solution Approach 1:
The patent applies local quality by setting different gap distances for different pixel positions. The distance between adjacent pixels in the same column is set to a first distance, while the distance between pixels in adjacent columns is set to a second distance that is greater than the first distance, optimizing deposition conditions locally for each pixel position
Data Source
AI summary
A pixel arrangement structure of an OLED display is provided. The pixel arrangement structure includes: a first pixel having a center coinciding with a center of a virtual square; a second pixel separated from the first pixel and having a center at a first vertex of the virtual square; and a third pixel separated from the first pixel and the second pixel, and having a center at a second vertex neighboring the first vertex of the virtual square.