Transparent Electrode Layer Design for TFT-LCD Connection Reliability
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Solution Overview
Problem
Errors in the vacuum assemblage and AU ball coating processes of liquid crystal cell manufacturing affect the transmission of electric potential between the color filter substrate and the array substrate in TFT-LCDs, leading to poor display quality due to limited design flexibility and increased susceptibility to assembly and coating errors.
Innovation Solution
A display panel design where the transparent electrode layer covers an area greater than the transfer plate, ensuring connection between the common line of the first substrate and the common electrode of the second substrate is maintained even with positional deviations, using a hollow latticed common line wire and insulating layers to enhance contact reliability and reduce crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transparent electrode layer covers only the transfer plate area, then the manufacturing process is simple, but the connection reliability is poor due to assembly and coating errors
Solution Approach 1:
The transparent electrode layer is designed to extend beyond the transfer plate boundaries, creating an excessive coverage area that provides tolerance for assembly and coating errors. This partial extension ensures reliable electrical connection even when positional deviations occur during manufacturing, directly resolving the contradiction between connection reliability and manufacturing simplicity.
2Object-affected harmful factors
If the common line wire is solid, then the manufacturing process is simple, but the signal interference between adjacent lines is high
Solution Approach 1:
The common line wire is designed with a hollow latticed structure instead of a solid configuration. This porous design reduces the wire's cross-sectional area, thereby minimizing electromagnetic interference and signal crosstalk between adjacent signal lines while maintaining electrical conductivity. The manufacturability is preserved through standard fabrication processes capable of creating hollow structures.
3Reliability
If the transparent electrode layer covers signal lines, then the connection area is increased, but the signal transmission is affected due to crosstalk
Solution Approach 1:
The transparent electrode layer is designed with spatially varying coverage: it extensively covers the transfer plate area for reliable connection, while deliberately avoiding coverage over signal lines to prevent crosstalk. This local differentiation in coverage quality resolves the contradiction by providing connection reliability where needed while eliminating harmful signal interference in other areas.
Data Source
AI summary
This application discloses a display panel, a manufacturing method therefor, and a display device. The display panel is divided into a display area and a non-display area, and the display panel includes a first substrate, a second substrate and an AU ball; the first substrate includes a transparent electrode layer and a common line, and the second substrate includes a common electrode; the common line and the common electrode are connected to each other through the AU ball; the common line includes a transfer plate, the transfer plate is arranged at a position corresponding to the AU ball, the transparent electrode layer and the transfer plate are in contact with and connected to each other, the transfer plate is connected to the AU ball through the transparent electrode layer, and a covering area of the transparent electrode layer is greater than a covering area of the transfer plate.