Triangular Pixel Arrangement for High PPI AMOLED Displays
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Solution Overview
Problem
The existing Fine Metal Mask (FMM) technology faces difficulties in producing high PPI (Pixel Per Inch) display devices, particularly in the AMOLED field, as it struggles to achieve desired pixel density beyond 300 ppi due to limitations in arranging sub-pixels within a pixel spacing.
Innovation Solution
A pixel arrangement structure where first and second pixels are alternately arranged in rows and columns, with sub-pixels forming triangular or isosceles triangle distributions, reducing the number of sub-pixels within a pixel spacing, allowing for higher resolution displays by using fewer FMM openings during vapor deposition, enabling production of displays with resolutions up to 500 ppi or more.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional stripe RGB sub-pixel arrangement is used, then manufacturing process is simpler, but pixel density cannot exceed 300 ppi
Solution Approach 1:
The patent transitions from traditional linear stripe arrangement to a triangular geometric distribution of sub-pixels. By arranging sub-pixels at vertices of triangles with specific side lengths (e.g., first side length L1, second side length L2, third side length L3), the design utilizes two-dimensional spatial optimization to achieve higher pixel density (500 ppi or more) while maintaining manufacturability through defined geometric relationships.
2Manufacturing precision
If more sub-pixels are arranged within pixel spacing to increase resolution, then pixel density increases, but FMM manufacturing complexity and cost increase
Solution Approach 1:
The patent defines specific parameter relationships for triangular sub-pixel arrangements, including side length ratios (L1:L2:L3), area ratios, and positional relationships. By establishing these quantitative parameters, the design enables higher pixel density while maintaining FMM manufacturability through well-defined geometric constraints that can be precisely fabricated.
3Ease of manufacture
If sub-pixels are arranged in triangular distribution, then fewer FMM openings are needed, but manufacturing precision requirements increase
Solution Approach 1:
The patent segments the pixel structure into distinct triangular sub-pixel units with defined vertices and sides. Each sub-pixel is positioned at specific vertices of triangles, creating a modular structure where the number of FMM openings is reduced while positioning precision is maintained through the geometric constraints of the triangular arrangement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach simplifies the manufacturing process, reduces the number of FMM openings, and achieves higher pixel densities while maintaining clear graphical image displays, particularly beneficial for high-resolution AMOLED displays.
Implementation Method 1
using fewer FMM openings during vapor deposition
Data Source
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AI summary
A pixel arrangement structure for a display device is provided. The pixel arrangement structure may comprise a first pixel (10A) and a second pixel (10B). The first pixel (10A) and the second pixel (10B) are alternately in a row direction and a column direction. The first pixel (10A) and the second pixel (10B) each comprise a first sub-pixel (11), a second sub-pixel (12) and a third sub-pixel (13). The first sub-pixel (11), the second sub-pixel (12) and the third sub-pixel (13) in the first pixel (10A) form a triangular distribution. The first sub-pixel (11), the second sub-pixel (12) and the third sub-pixel (13) in the second pixel (10B) form an inverted triangular distribution relative to the triangular distribution in the first pixel (10A). The second sub-pixel (12) and the third sub-pixel (13) in each of the first pixel (10A) and the second pixel (10B) are located on substantially the same row.