Auxiliary Black Matrix Segmentation for LCD Static Control
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Solution Overview
Problem
In liquid crystal display panels, the cutting process for mother substrates can introduce static electricity into the black matrix, leading to display abnormalities and visible white lines due to light leakage in the peripheral areas, affecting the user's viewing experience.
Innovation Solution
A display substrate design that includes a base substrate with a black matrix and an auxiliary black matrix in the peripheral area, spaced apart from the main black matrix, which covers the entire peripheral region to prevent static electricity and light leakage, enhancing display quality by eliminating white lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single black matrix is used in the peripheral area, then the structure is simple and manufacturing is easy, but static electricity accumulates during cutting and causes display abnormalities and white lines
Solution Approach 1:
The single black matrix is divided into two separate black matrices: a first black matrix and a second black matrix. The second black matrix is spaced apart from the first black matrix in the peripheral area, creating a segmented structure that prevents static electricity accumulation during cutting while maintaining display quality.
2Reliability
If the black matrix covers the entire peripheral area, then light leakage is prevented, but the cutting process introduces static electricity that causes display abnormalities
Solution Approach 1:
The continuous black matrix covering the peripheral area is segmented into two separate black matrices with spacing between them. This segmentation allows the peripheral area to remain covered for light leakage prevention while creating gaps that prevent static electricity accumulation during the cutting process.
3Manufacturing precision
If a single black matrix is used, then manufacturing precision requirements are lower, but white lines appear due to light leakage in peripheral areas
Solution Approach 1:
The black matrix structure is segmented into two separate matrices spaced apart in the peripheral area. This segmentation effectively eliminates white lines caused by light leakage while maintaining reasonable manufacturing precision requirements, as each individual black matrix can be fabricated with standard precision.
Data Source
AI summary
The present application provides a display substrate having a display area and a peripheral area. The display substrate includes a base substrate; a black matrix in the peripheral area on the base substrate; and an auxiliary black matrix in the peripheral area on the base substrate and spaced apart from the black matrix. The auxiliary black matrix is in an outer peripheral region of the peripheral area. The outer peripheral region is a region outside the black matrix and on a side of a region in the peripheral area occupied by the black matrix distal to the display area.