Group Pixel Arrangement for High-Resolution Display Mask Fabrication
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Solution Overview
Problem
High-resolution display devices face challenges in maintaining a high aperture ratio and facilitating mask fabrication due to the need for maintaining a minimum distance between pixels to prevent color mixture, which limits the reduction of pixel size and increases difficulty in mask deposition.
Innovation Solution
The use of group pixels, where multiple pixels of the same color are arranged closer together, such as in rectangular or diagonal configurations, allowing for reduced distances between same-color pixels while maintaining separate distances between different color pixels, facilitating easier mask fabrication and increased pixel size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pixel size is reduced to achieve higher resolution, then the resolution is improved, but the aperture ratio decreases and mask fabrication becomes difficult
Solution Approach 1:
The patent segments the pixel array into groups where pixels of the same color are clustered together. This segmentation allows the mask to cover multiple same-color pixels simultaneously, effectively increasing the mask opening area and facilitating mask fabrication even as individual pixel sizes are reduced for higher resolution displays.
Solution Approach 2:
The patent merges multiple pixels of the same color into a group that can be addressed by a single mask opening. By combining the deposition targets for same-color pixels, the effective mask opening area is increased, making mask fabrication feasible while maintaining high resolution through the reduced individual pixel dimensions.
2Area of moving object
If the distance between pixels is reduced to increase pixel size, then the aperture ratio is improved, but color mixture occurs between adjacent pixels
Solution Approach 1:
The patent applies different spatial arrangements to different color groups. Pixels of the same color are positioned closer together within a group, while different color groups are separated by sufficient distance to prevent color mixture. This local quality differentiation allows reduced pixel-to-pixel distance within groups without causing harmful color mixing between adjacent different-color pixels.
Solution Approach 2:
The patent introduces a two-level spatial organization: within-group proximity (allowing small distances) and between-group separation (maintaining large distances). This dimensional hierarchy resolves the contradiction by operating at different spatial scales - close packing within color groups increases pixel size, while group separation prevents color mixture.
3Manufacturing precision
If multiple colors are deposited separately to prevent color mixture, then color purity is maintained, but manufacturing complexity and time increase
Solution Approach 1:
The patent merges the deposition process for multiple same-color pixels into a single mask operation. By grouping pixels of the same color and using a single mask opening to deposit material on all group pixels simultaneously, the number of deposition steps is reduced while maintaining color purity through the spatial grouping strategy.
Solution Approach 2:
The patent makes the mask serve multiple functions: it defines individual pixel boundaries, groups same-color pixels together, and enables simultaneous deposition on multiple pixels. This multi-functionality reduces the number of separate deposition operations needed while maintaining precise color placement and preventing color mixture.
Data Source
AI summary
A display device includes a substrate, and a group pixel on the substrate, the group pixel comprising at least two pixels that represent the same color, wherein in the group pixel, a distance between the pixels is smaller than a distance between adjacent pixels of different group pixels.