Array Substrate Blocking Wall Structure for Spacer Containment
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Solution Overview
Problem
Liquid crystal display panels face issues with spacers shifting due to external forces, causing scratches on the alignment film and light leakage in pixel regions, which affects display quality, and existing solutions that increase the black matrix width reduce the aperture ratio, compromising resolution.
Innovation Solution
An array substrate with a blocking wall structure between the gate lines and pixel regions, featuring a gradually increasing edge distance and a groove structure to guide spacers, preventing them from shifting into the pixel area, and a stop structure to prevent further movement, while maintaining a high aperture ratio by allowing spacers to shift into the black matrix area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the width or size of the cross section of the black matrix is increased to prevent spacer shifting into the pixel region, then the reliability of preventing light leakage is improved, but the aperture ratio of the pixel unit is reduced
Solution Approach 1:
The invention divides the non-pixel region into two functional zones: a spacer blocking area with a blocking wall structure that prevents spacer movement into the pixel region, and a black matrix area that maintains display uniformity. This segmentation allows the blocking function to be performed without requiring the black matrix to extend into the pixel region, thereby preserving the aperture ratio while ensuring reliability against light leakage.
Solution Approach 2:
The blocking wall structure serves as an intermediary element between the gate line and the pixel region. It provides a dedicated spacer blocking function without requiring the black matrix to be enlarged, thus mediating between the need for spacer containment and the need to maintain high aperture ratio for display quality.
2Ease of operation
If spacers are allowed to shift freely in the non-pixel region under external force, then the ease of operation is improved, but the alignment film in the pixel region is scratched causing light leakage
Solution Approach 1:
The blocking wall structure is pre-positioned in the non-pixel region to create a preliminary barrier against spacer movement. When external forces act on the display panel causing substrates to move relative to each other, the blocking wall structure proactively prevents spacers from shifting into the pixel region before any potential damage to the alignment film can occur.
Solution Approach 2:
The invention converts the potential harmful effect of spacer movement into a beneficial containment mechanism. By designing the blocking wall structure with appropriate height and positioning, the natural tendency of spacers to shift under external force is redirected toward the black matrix area rather than allowing them to invade the pixel region and damage the alignment film.
Data Source
AI summary
Embodiments of the present disclosure provide an array substrate, a color filter substrate and a display panel. The array substrate includes: a base substrate; gate lines and data lines provided above the base substrate in a cross arrangement; and a plurality of pixel units defined by the gate lines and the data lines, each pixel unit including a pixel region and a non-pixel region. At least a portion of the gate line is located in the non-pixel region, a blocking wall region is formed in the non-pixel region and located between the portion of the gate line located in the non-pixel region and the pixel region, and a blocking wall structure for blocking movement of a spacer from the non-pixel region to the pixel region is formed in the blocking wall region.