Display Subpixel Layout for Straight Transverse Lines
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Solution Overview
Problem
The Delta RGB arrangement mode in high-PPI display devices results in wavy transverse lines due to uneven distribution of sub-pixels, which is unsuitable for applications requiring fine patterns like Chinese characters with many straight lines.
Innovation Solution
A display substrate design with sub-pixels arranged in staggered rows and columns, where the white brightness centers of adjacent pixels are aligned on a straight line, forming equilateral or isosceles triangles, and sub-pixels are evenly distributed to prevent wavy lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If Delta RGB arrangement mode is used to increase PPI and improve aperture ratio, then sub-pixel distribution becomes more even and manufacturing processability improves, but transverse lines become wavy making it unsuitable for fine pattern display
Solution Approach 1:
The patent introduces a compensation area with asymmetric structure adjacent to the light-emitting region. This compensation area has different width from the light-emitting region width, creating an asymmetric pixel structure that offsets the wavy line effect while preserving the benefits of Delta RGB arrangement for sub-pixel distribution and aperture ratio.
Solution Approach 2:
The patent modifies the pixel structure by adding a compensation area with specific width parameters. The compensation area width is designed to be different from the light-emitting region width, creating a parameter change that compensates for the wavy line distortion and improves transverse line straightness.
2Ease of manufacture
If Delta RGB arrangement mode is used to achieve high aperture ratio, then process accuracy requirements are reduced, but display quality for fine lines and patterns deteriorates
Solution Approach 1:
The asymmetric compensation area structure provides additional design flexibility that allows easier manufacturing while maintaining fine pattern display quality. The compensation area acts as a buffer that reduces sensitivity to process variations.
Solution Approach 2:
By introducing the compensation area with adjustable width parameters, the patent creates a structure that is more tolerant to process variations. The parameter change in compensation area width allows optimization for both ease of manufacture and fine pattern display quality.
3Quantity of substance
If sub-pixels are arranged in Delta RGB mode with even distribution, then physical distribution ratio increases, but transverse lines appear wavy at insufficient PPI
Solution Approach 1:
The patent introduces asymmetric compensation areas that geometrically compensate for the wavy line effect caused by even sub-pixel distribution. The compensation area creates a geometric correction that maintains straight transverse lines while preserving even sub-pixel distribution.
Solution Approach 2:
The patent modifies the geometric parameters by adding compensation areas with specific width dimensions. This parameter change creates a geometric correction that offsets the wavy line distortion while maintaining the benefits of even sub-pixel distribution.
Data Source
AI summary
The present disclosure provides a display substrate and a display device. The display substrate includes a plurality of sub-pixels in rows. The sub-pixels in each row includes first sub-pixels, second sub-pixels and third sub-pixels arranged alternately, and two adjacent rows of sub-pixels are arranged in a staggered manner. In every two adjacent rows of sub-pixels, each first sub-pixel in one row of sub-pixels and the second sub-pixel and the third sub-pixel adjacent to the first sub-pixel in another row of sub-pixels form a pixel. White brightness centers of the pixels in a same pixel row are located on a same straight line, and a brightness center of the first sub-pixel is not on a same straight line as the brightness centers of the second sub-pixel and the third sub-pixel located in a same sub-pixel row.