Display Substrate Sub-Pixel Layout for High-Resolution OLEDs
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Solution Overview
Problem
Conventional display substrates face challenges in achieving high-resolution OLED display devices due to limitations in the manufacturing process of high-precision metal masks, which affect the size and arrangement of sub-pixels.
Innovation Solution
A display substrate design with alternating arrangements of first and third sub-pixels forming virtual quadrilaterals, along with second sub-pixels positioned within these quadrilaterals, allows for closer pixel packing and improved resolution by staggering the sub-pixels, enhancing the manufacturing process of high-precision metal masks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional metal mask manufacturing process is used, then manufacturing simplicity is maintained, but display resolution is limited
Solution Approach 1:
The patent transitions from conventional rectangular pixel arrangements to a triangular/diamond-based arrangement where pixels are positioned at vertices and centers of equilateral triangles. This dimensional reorganization allows pixels to be packed more efficiently in two-dimensional space, achieving higher resolution without requiring more complex manufacturing processes. The key is repositioning pixels along diagonal and orthogonal axes at specific angular relationships (60°, 120°, 180°, 240°, 300°) rather than following traditional grid patterns.
Solution Approach 2:
The patent employs asymmetric positioning of different colored sub-pixels (red, green, blue) within the triangular arrangement. Specifically, green sub-pixels are positioned at triangle centers while red and blue sub-pixels are positioned at vertices, creating an asymmetric yet balanced configuration that optimizes color distribution and brightness uniformity across the display panel.
2Manufacturing precision
If sub-pixel size is reduced for higher resolution, then display resolution improves, but aperture ratio decreases
Solution Approach 1:
By arranging pixels in a triangular lattice rather than a rectangular grid, the patent achieves more efficient space utilization. The triangular arrangement allows sub-pixels to be positioned at optimal distances from each other, maximizing the light-emitting area within each pixel unit. This dimensional change enables smaller sub-pixel dimensions while maintaining or improving the overall aperture ratio, as the triangular geometry provides better packing efficiency compared to conventional rectangular arrangements.
3Stability of the object's composition
If conventional rectangular pixel arrangement is used, then manufacturing simplicity is maintained, but brightness distribution uniformity is insufficient
Solution Approach 1:
The patent uses asymmetric positioning of green sub-pixels at triangle centers and red/blue sub-pixels at vertices to achieve superior brightness uniformity. This asymmetric arrangement ensures that each color channel has optimal spatial distribution, with green sub-pixels providing central illumination and red/blue sub-pixels providing corner illumination. The result is a more uniform overall brightness distribution across the pixel area compared to symmetric conventional arrangements.
Solution Approach 2:
The triangular pixel arrangement serves multiple functions simultaneously: it achieves higher resolution, improves brightness uniformity, maintains manufacturing feasibility, and enables better color mixing. The geometric configuration inherently provides both spatial efficiency for resolution and optimal color distribution for uniformity, making the structure multi-functional and highly effective.
Data Source
AI summary
The present disclosure provides a display substrate and related devices. The display substrate includes a plurality of first sub-pixels, second sub-pixels and third sub-pixels. In a first direction, the first sub-pixels and the third sub-pixels are arranged alternately to form a plurality of first sub-pixel rows, the second sub-pixels form a plurality of second sub-pixel rows, the first sub-pixel rows and the second sub-pixel rows are arranged alternately in a second direction, connection lines of center points of two first sub-pixels and two third sub-pixels form a first virtual quadrilateral, the two first sub-pixels are located at two vertex angles of the first virtual quadrilateral which are opposite to each other, one second sub-pixel is located within the first virtual quadrilateral, and the first virtual quadrilateral includes two interior angles each being equal to 90° and two interior angles each being not equal to 90°.