Display Substrate With Recessed Side Surfaces for High Pixel Density
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Solution Overview
Problem
Current OLED or QLED display screens face challenges in achieving high resolution due to their complex pixel structure, which cannot be adequately improved by simply rearranging or sharing pixels.
Innovation Solution
A display substrate with a base featuring recesses and a pixel circuit layer containing pixel driving circuits arranged in an array. The pixel driving circuits are partially formed on the side surfaces of the recesses, allowing for a higher pixel density while maintaining performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pixels are reasonably arranged or shared to improve resolution, then pixel density increases, but the complex pixel structure prevents achieving desired resolution
Solution Approach 1:
The patent introduces a third dimension by forming pixel driving circuits on the side surface of recesses in the base substrate. This vertical utilization of space allows pixel circuits to be arranged in multiple layers, effectively increasing pixel density without increasing planar area occupation, thereby resolving the contradiction between resolution improvement and structural complexity
Solution Approach 2:
The patent embeds pixel driving circuits within recesses formed in the base substrate. The circuits are nested inside the three-dimensional space created by the recesses, allowing compact integration of pixel components while maintaining high resolution display performance without requiring complex planar arrangements
2Quantity of substance
If pixel density is increased to improve resolution, then more pixels fit in the display area, but the complex pixel structure limits further density increases
Solution Approach 1:
By utilizing the vertical space on the side surface of recesses, the patent enables multi-layer arrangement of pixel circuits. This dimensional transition from two-dimensional planar arrangement to three-dimensional vertical stacking significantly increases the quantity of pixels that can be integrated into a given display area, overcoming the limitations imposed by complex pixel structures
Solution Approach 2:
The patent divides the pixel driving circuits into distinct functional sub-circuits (driving sub-circuit, storage sub-circuit, data write sub-circuit, reset sub-circuit) that can be independently arranged on different surfaces (side surface, top surface, bottom surface) of the recesses. This segmentation allows flexible spatial distribution of circuit components, maximizing pixel density while managing structural complexity
Data Source
AI summary
There is provided a display substrate including a base and a pixel circuit layer on the base, the pixel circuit layer includes pixel driving circuits arranged in an array along a first direction and a second direction. The base has recesses, each of which extends in the first direction and has a bottom surface and a side surface, a surface of the base includes the bottom surface and the side surface of each recesses, and a top surface between adjacent recesses, the bottom surface of each recess is substantially parallel to the top surface between adjacent recesses, the side surface of each recesses is at a first angle to the bottom surface of the recess and the top surface between adjacent recesses, and a portion of each pixel driving circuits is formed on the side surface of one recess. A method for preparing a display substrate is further provided.