Array Substrate Raised Structures Block Spacer Movement
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Solution Overview
Problem
In liquid crystal display panels, main spacers can move under external forces, potentially damaging the orientation layer and causing light leakage, which affects the display's performance and aperture ratio.
Innovation Solution
The array substrate incorporates raised structures between spacer contact areas and light transmission regions to block the movement of main and auxiliary spacers, preventing them from reaching the orientation layer and reducing the risk of light leakage, while maintaining the aperture ratio by minimizing the need for widening the black matrix.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the black matrix is widened to prevent spacer movement, then the reliability is improved, but the aperture ratio is reduced
Solution Approach 1:
The solution divides the spacer movement prevention function into two parts: the black matrix provides general shielding, while the raised structure provides localized blocking at critical positions. This segmentation allows the black matrix to maintain its original width without reduction in aperture ratio, while the raised structure specifically prevents spacer movement into pixel regions.
Solution Approach 2:
The raised structure acts as an intermediary element between the black matrix and the spacer. It provides an additional mechanical barrier that stops spacer movement before the spacer can reach the pixel region, eliminating the need to widen the black matrix while maintaining both reliability and aperture ratio.
2Device complexity
If the spacer moves under external force, then the device complexity is reduced, but the harmful factors increase due to orientation layer damage and light leakage
Solution Approach 1:
The raised structure is pre-configured on the array substrate to provide preliminary blocking action against spacer movement. When external force is applied, the raised structure immediately prevents the spacer from moving into the pixel region, thereby preventing orientation layer damage and light leakage before they can occur.
3Reliability
If the raised structure is added to block spacer movement, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The raised structure is formed by extending the black matrix upward in the thickness direction, merging the shielding function of the black matrix with the blocking function of the raised structure into a single integrated component. This reduces device complexity compared to adding a completely separate structure.
Solution Approach 2:
The raised structure serves multiple functions: it provides mechanical blocking of spacer movement, maintains the shielding function of the black matrix, and defines the boundary between the black matrix region and pixel regions. This multi-functionality reduces the need for additional separate components.
Data Source
AI summary
An array substrate includes a first base substrate, and gate lines and data lines arranged on the first base substrate. The gate lines and the data lines crosswise define pixel regions, wherein the pixel regions include light transmission areas one-to-one. The array substrate further includes a first raised structure arranged between a main spacer initial contact area and one of the light transmission areas, wherein the first raised structure is configured to provide a blocking function to a movement of a main spacer.