OLED Pixel Arrangement Structure for Mask Sharing
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Solution Overview
Problem
The manufacturing of high-resolution organic light-emitting diode display devices is hindered by the difficulty in producing fine metal masks and color mixing issues in sub-pixel arrangements, which limit resolution and increase manufacturing complexity.
Innovation Solution
A pixel arrangement structure where adjacent pixel rows are misaligned, allowing first and second sub-pixels of the same color to share fine metal mask openings, reducing color mixing and manufacturing challenges while increasing resolution without altering the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fine metal mask density is increased to achieve higher resolution, then resolution improves, but manufacturing difficulty increases significantly
Solution Approach 1:
The patent merges adjacent openings of the same color in the fine metal mask into a single shared opening. For example, multiple red sub-pixel openings are combined into one shared red opening that serves multiple sub-pixels. This reduces the total number of openings required in the fine metal mask, making manufacturing easier while maintaining or improving resolution.
2Quantity of substance
If distance between openings of different colors is reduced to increase sub-pixel density, then sub-pixel density improves, but color mixing occurs
Solution Approach 1:
The patent combines openings of the same color into shared openings while maintaining spatial separation between different colors. Multiple sub-pixels of the same color share a common opening, but openings of different colors remain distinct and separated, preventing color mixing while increasing effective sub-pixel density.
Solution Approach 2:
The patent introduces a sharing dimension where multiple sub-pixels share a common opening in the fine metal mask layer. This dimensional reorganization allows higher sub-pixel density without reducing the physical separation between different color openings, thus avoiding color mixing.
3Measurement precision
If number of sub-pixels is increased to improve resolution, then resolution improves, but manufacturing complexity increases
Solution Approach 1:
The patent merges multiple sub-pixel openings of the same color into shared openings in the fine metal mask. This reduces the total number of discrete openings that need to be manufactured, thereby reducing manufacturing complexity while maintaining the ability to achieve high resolution through the shared opening architecture.
Data Source
AI summary
A pixel arrangement structure includes a plurality of pixel rows. Two adjacent ones of the pixel rows are disposed to be misaligned with each other. Each of the pixel rows includes a plurality of pixels. Each of the pixels includes a first sub pixel; a second sub pixel; and a third sub pixel. The first sub pixel in an N+1-th pixel row is disposed adjacent to the first sub pixel of one of the pixels in an N+2-th pixel row, the second sub pixel in an N-th pixel row is disposed adjacent to the second sub pixel of one of the pixels in the N+1-th pixel row, and N is a positive odd number greater than or equal to 1. An organic light-emitting diode display device is further provided.