Display Panel Sub-Pixel Arrangement for Mask Fabrication
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Solution Overview
Problem
Existing display panel technologies face challenges in achieving high resolution and aperture ratio due to limitations in mask fabrication, leading to issues like color mixing and jagged twill, which restrict further improvements in display performance.
Innovation Solution
A display panel design featuring alternately arranged pixel rows with sub-pixels of the same color sharing a mask opening, allowing for increased mask accuracy and reduced fabrication difficulty, while the sub-pixels are arranged along a direction intersecting with the pixel row to minimize color mixing and improve aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the critical dimension of the mask is reduced to increase resolution, then the resolution of the display panel is improved, but the accuracy of the fabricated mask cannot be guaranteed
Solution Approach 1:
The pixel array is divided into first pixel rows and second pixel rows with different sub-pixel arrangements. First pixel rows contain sub-pixels arranged in one direction while second pixel rows contain sub-pixels arranged in another direction, allowing the mask critical dimension to be optimized for each segment rather than requiring uniform small dimensions across the entire display
Solution Approach 2:
The patent introduces a directional arrangement where sub-pixels in adjacent pixel rows are oriented at different angles (first direction and second direction). This dimensional change in arrangement allows the mask opening to be larger while still achieving high resolution through the angular differentiation of sub-pixel orientations
2Area of stationary object
If the spacing between adjacent sub-pixels with different colors is reduced to increase aperture ratio, then the aperture ratio is improved, but color mixing occurs
Solution Approach 1:
The patent creates an asymmetric arrangement where sub-pixels in first pixel rows are oriented in a first direction while sub-pixels in second pixel rows are oriented in a second direction. This asymmetric directional arrangement ensures that adjacent sub-pixels with different colors are not perfectly aligned, reducing color mixing while allowing smaller spacing to increase aperture ratio
Solution Approach 2:
Different regions of the pixel array (first pixel rows vs. second pixel rows) have different sub-pixel arrangement directions. This local quality differentiation allows each region to optimize for both tight spacing (high aperture ratio) and color separation (prevent mixing) through its specific directional arrangement
3Manufacturing precision
If the mask critical dimension is increased to improve fabrication accuracy, then the mask fabrication accuracy is improved, but the resolution of the display panel is directly affected
Solution Approach 1:
The display is segmented into different pixel row types with different sub-pixel orientations. This segmentation allows the mask to have larger critical dimensions for accurate fabrication while the angular differentiation between segments maintains high resolution
Solution Approach 2:
By introducing angular differentiation in sub-pixel arrangements across different pixel rows, the patent resolves the conflict between mask size and resolution. The mask can be larger (improving fabrication accuracy) while the angular arrangement in another dimension maintains the resolution by creating distinct sub-pixel orientations
Data Source
AI summary
A display panel and a fabrication method of the display panel are provided. The display panel includes a plurality of pixel rows, which includes first pixel rows and second pixel rows that are alternately arranged and is extended along a first direction. A first pixel row includes a plurality of first units, and a first unit includes two first sub-pixels arranged along a second direction with a same color. First sub-pixels in adjacent first units have different colors. The second direction intersects with and is non-perpendicular to the first direction. A second pixel row includes a plurality of second units, and a second unit includes two second sub-pixels arranged along the second direction with a same color. The first pixel rows and the second pixel rows are alternately arranged in a third direction perpendicular to the first direction. The first sub-pixels have a color different from the second sub-pixels.