COA Pixel Unit Shared Color Resist Opening for Aperture Ratio
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Solution Overview
Problem
In COA liquid crystal displays, the large size of color-resist openings required for bridging holes reduces space utilization and aperture opening ratio in the TFT region due to separate openings for each bridging hole, leading to inefficient use of space.
Innovation Solution
The design includes a pixel unit where multiple bridging holes are within a shared color resist opening, with a spacing between adjacent bridging holes less than the sum of conventional spacings, allowing for reduced space occupation by color resist openings and improved aperture opening ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate color-resist openings are provided for each bridging hole, then electrical connection is ensured, but space utilization and aperture opening ratio are reduced
Solution Approach 1:
The patent merges multiple separate color-resist openings into a single shared color-resist opening that accommodates multiple bridging holes. This is achieved by positioning multiple bridging holes within the boundaries of one common color-resist opening, thereby reducing the total number of openings required and increasing space utilization in the TFT region.
Solution Approach 2:
The shared color-resist opening serves multiple functions by providing electrical connection for multiple bridging holes simultaneously. This multi-functional opening replaces what would traditionally require multiple separate openings, each dedicated to a single bridging hole, thus improving aperture opening ratio while maintaining all necessary electrical connections.
2Reliability
If aperture of color-resist opening is made far greater than bridging holes, then electrical conduction is ensured, but single color-resist opening occupies large space
Solution Approach 1:
The patent combines the functions of multiple large color-resist openings into one shared opening. By positioning multiple bridging holes within this single opening, the total space occupied is reduced compared to having separate openings for each bridging hole, while still ensuring adequate electrical conduction paths for all connections.
Solution Approach 2:
The patent changes the spatial parameters by reducing the distance between adjacent bridging holes to less than the sum of their conventional spacings. This parameter change allows multiple bridging holes to fit within a single color-resist opening boundary, thereby reducing the overall area occupied while maintaining electrical conduction reliability.
Data Source
AI summary
A pixel unit, a COA substrate and a liquid crystal display panel having the same are provided. In the pixel unit, a plurality of bridging holes share a color resist opening and a spacing between two adjacent bridging holes is less than a sum of conventional spacings separately corresponding to the two adjacent bridging holes. With the pixel unit, the space occupied by the color resist opening can be reduced, the space utilization of a TFT region is further improved, and the aperture opening ratio is increased.