Liquid Crystal Panel Spacer Alignment via Protrusions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Alignment deviation between the array substrate and the color filter substrate during the fabrication of liquid crystal display panels can affect the uniformity of the liquid crystal panel's thickness due to the uneven surface of TFTs, where primary spacers are typically provided.
Innovation Solution
The implementation of protrusions on the array substrate or color filter substrate, which are formed simultaneously with the primary and secondary spacers, allowing these spacers to contact the protrusions instead of the TFTs, thereby maintaining uniform thickness by aligning with the substrate features rather than the uneven TFT surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If primary spacers are provided on the TFT surface to maintain cell gap, then the cell gap can be maintained, but alignment deviation between array substrate and color filter substrate affects thickness uniformity due to uneven TFT surface
Solution Approach 1:
The patent introduces protrusions as intermediary structures formed on the array substrate that serve as new reference points for spacer placement. These protrusions replace the uneven TFT surface as the contact point for primary spacers, providing a uniform and predictable alignment feature that eliminates alignment deviation between substrates while maintaining the cell gap function.
Solution Approach 2:
The protrusions are formed in advance during the array substrate fabrication process, before the color filter substrate is assembled. This preliminary creation of alignment features ensures that when spacers are placed, they contact predetermined uniform structures rather than the uneven TFT surface, preventing alignment issues before they occur.
2Reliability
If primary spacers contact the TFT surface, then cell gap is maintained, but thickness uniformity deteriorates due to surface unevenness
Solution Approach 1:
The protrusions act as intermediary structures that transfer the cell gap maintenance function from direct TFT-contact to a controlled reference surface. The primary spacers contact the protrusions rather than the uneven TFT surface, ensuring both reliable cell gap maintenance and uniform thickness across the display panel.
Data Source
AI summary
A liquid crystal display panel according to an embodiment of the disclosure comprises an array substrate and a color filter substrate, and primary spacers and protrusions are formed on the array substrate and the color filter substrate and contact each other, the protrusions corresponding to at least one of gate lines and data lines on the array substrate. Also, a method for manufacturing a liquid crystal display panel is provided.