OLED Subpixel Layout With Curved Edges for Higher Resolution
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Solution Overview
Problem
The manufacturing process of high-resolution OLED display panels faces challenges in maintaining mask stability due to the close proximity of sub-pixels, leading to contamination and color mixing, while adjusting the area of light-emitting regions for different organic materials complicates the design and reduces the overall service life of the display panel.
Innovation Solution
A display panel design featuring alternately arranged first, second, and third sub-pixels with unique light-emitting regions, including curved edges, allows for the adjustment of light-emitting area without shifting adjacent sub-pixels, improving resolution and service life by optimizing the arrangement of light-emitting regions and reducing mask complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distance between light-emitting regions of adjacent sub-pixels is reduced to increase resolution, then the resolution is improved, but the mask stability deteriorates leading to contamination and color mixing
Solution Approach 1:
The pixel array is segmented into first pixels containing only first sub-pixels, and second pixels containing only second sub-pixels, with different arrangement patterns. This segmentation allows independent optimization of each pixel type's sub-pixel layout, enabling closer spacing without compromising overall mask stability during the evaporation process.
Solution Approach 2:
The patent employs asymmetric arrangement of sub-pixels within different pixel types - first pixels have first sub-pixels arranged in one pattern while second pixels have second sub-pixels arranged in a different pattern. This asymmetric design breaks the symmetry that causes uniform contamination risks, allowing resolution enhancement while maintaining differential mask stability characteristics.
2Duration of action of stationary object
If the area of light-emitting region for short-life organic material (B sub-pixel) is increased to prolong service life, then the overall service life is improved, but the design complexity increases due to position adjustments
Solution Approach 1:
By segmenting the display into different pixel types with dedicated sub-pixel arrangements, the patent enables independent area optimization for each sub-pixel color without requiring complex position adjustments across the entire display. The first and second pixels can be designed with different light-emitting region areas tailored to the specific life requirements of each organic material.
Solution Approach 2:
The patent changes the area parameter of light-emitting regions for different sub-pixel types based on the service life requirements of their organic materials. By allowing different area parameters for first sub-pixels and second sub-pixels, the design achieves extended service life for short-life materials while maintaining manageable design complexity through systematic parameter differentiation.
Data Source
AI summary
The present disclosure provides a display panel comprising multiple first, second and third sub-pixels having first, second and third effective light-emitting regions respectively. In a row direction, the first effective light-emitting regions form first rows of effective light-emitting regions, and the second and third effective light-emitting regions are alternately arranged to form second rows of effective light-emitting region. The first and second rows are alternately arranged in a column direction perpendicular to the row direction. A virtual quadrilateral is formed by lines connecting geometric centers of gravity of four first effective light-emitting regions in two adjacent rows and two adjacent columns. Geometric centers of gravity of the second and third effective light-emitting region are located in corresponding virtual quadrilaterals respectively. The second effective light-emitting region comprises at least one first curved edge, and/or the third effective light-emitting region comprises at least one second curved edge.