OLED Display Panel Pixel Shape Optimization
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Solution Overview
Problem
Conventional OLED display panels have low aperture ratios due to large unused spaces between pixels, which are caused by the limitations of pixel shapes and gaps between adjacent pixels.
Innovation Solution
A display panel design where pixels are alternately arranged in multiple directions with specific shapes, including ellipses and concave arcs, ensuring that the sum of the radius of curvature of the pixel edges and the gap width matches the concave arc radius, thereby minimizing unused space and increasing aperture ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional pixel shapes with gaps are used, then manufacturing is simpler, but aperture ratio is low due to large unused spaces between pixels
Solution Approach 1:
The patent applies curvature by designing pixel edges with concave arcs instead of straight lines. Specifically, the second and third pixels have concave arc edges that complement the convex edges of the first pixel, creating a curved, interlocking pattern that eliminates unused spaces and maximizes aperture ratio while maintaining manufacturability.
Solution Approach 2:
The patent employs asymmetry by creating non-uniform pixel shapes where the first pixel has a different configuration than the second and third pixels. The first pixel features convex edges while the second and third pixels have concave arc edges, creating an asymmetric but complementary arrangement that optimizes space utilization.
2Area of stationary object
If gaps between adjacent pixels are reduced, then aperture ratio increases, but luminescent materials from different pixels may interfere with each other
Solution Approach 1:
The patent applies local quality by creating different edge characteristics at different locations. The pixel edges feature concave and convex arcs with specific radius of curvature relationships, where the sum of the radius of curvature of the first pixel's edge and the gap width equals the radius of curvature of the concave arc. This localized geometric design ensures minimal gaps while preventing luminescent material interference through the complementary arc shapes that create natural separation.
3Area of stationary object
If pixel shapes are optimized to reduce unused space, then aperture ratio increases, but manufacturing precision requirements increase
Solution Approach 1:
The patent uses concave and convex arcs with defined radius of curvature relationships to create pixel edges. The specific geometric relationship (sum of radius of curvature of first pixel edge and gap width equals radius of curvature of concave arc) provides a clear manufacturing target while the curved shapes naturally reduce stress concentrations and facilitate precise fabrication compared to sharp corners or complex polygons.
Data Source
AI summary
A display panel is provided. At least two of each of first pixels, each of second pixels, and each of third pixels of the display panel are alternately arranged. A shape of each of first pixels includes an ellipse or a circle. A shape of an edge of each of the second pixels or each of the third pixels corresponds to a concave arc. A sum of a radius of curvature of an edge of each of the first pixels and a width of a predetermined gap is equal to a radius of curvature of the concave arc corresponding to the edge of one of each of the second pixels and each of the third pixels. An aperture ratio of a pixel is effectively increased.