Array Substrate Mark Layout for Micro-LED Alignment Space Saving
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Solution Overview
Problem
In micro-LED display panels, the use of soft stamp transfer technology requires a large alignment mark on the array substrate, which occupies valuable space in the pixel disposition region.
Innovation Solution
The implementation of a first arrangement pattern and a second arrangement pattern within the pixel disposition region serves as an alignment mark, eliminating the need for a special alignment mark on the array substrate, thereby saving space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a special alignment mark is disposed on the array substrate for soft stamp transfer technology, then alignment accuracy is improved, but the area of the pixel disposition region is reduced
Solution Approach 1:
The patent merges the alignment mark function with existing pixel structure elements (such as electrode pads or pixel electrodes) by arranging them in specific patterns. This integration eliminates the need for separate dedicated alignment marks, thereby preserving pixel disposition region area while maintaining alignment accuracy through the combined structural elements serving dual purposes.
Solution Approach 2:
The patent makes existing pixel structure elements serve multiple functions: they act as both functional pixel components and alignment marks for the soft stamp transfer process. By designing electrode pads or pixel electrodes with specific geometric arrangements, these elements universally serve both their original electrical function and the alignment function, eliminating the need for separate alignment mark structures.
2Measurement precision
If the alignment mark size is increased to improve alignment accuracy, then alignment precision is improved, but the space occupation in the pixel disposition region increases
Solution Approach 1:
The patent combines the alignment mark with existing pixel structures such that the alignment mark area is effectively zero additional space. The electrode pads or pixel electrodes are arranged in patterns that provide alignment functionality without requiring extra space beyond what is already allocated for pixel elements, thus improving alignment precision without increasing overall area occupation.
Solution Approach 2:
The patent utilizes the spatial arrangement and geometric configuration of pixel elements in the two-dimensional plane to encode alignment information. By varying the positions, shapes, or patterns of electrode pads rather than increasing their size, the alignment precision is improved through dimensional arrangement rather than scale expansion, avoiding additional area occupation.
Data Source
AI summary
Provided are an array substrate, a display panel and a display device, relating to the field of display technology. The array substrate includes a pixel disposition region including multiple pixel regions arranged along a first direction and a second direction. The first direction intersects the second direction. The pixel disposition region includes a first region and a second region that each includes at least one pixel region. The array substrate further includes a substrate and marks located on one side of the substrate and in the pixel disposition region. In the first region, marks of the at least one pixel region are a first arrangement pattern, and in the second region, marks of the at least one pixel region are a second arrangement pattern. The first arrangement pattern is different from the second arrangement pattern.