LCD Panel Common Electrode Conduction Detection via Segmented Sub-regions
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Solution Overview
Problem
Poor alignment between the color filter substrate and the array substrate in liquid crystal display panels leads to abnormal conductivity issues, such as poor conductivity of gold balls, resulting in display problems like gamma abnormalities and crosstalk, due to the diffusion of alignment films before curing.
Innovation Solution
Incorporating conductive members between the array substrate and the color filter substrate, with some conductive members connecting the common electrode line to the common electrode layer and others connecting the common electrode layer to a detection pad, allowing for the detection of normal conduction by checking for voltage on the detection pad.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gold balls are used to connect the array substrate and color filter substrate, then electrical conduction is achieved, but alignment issues and film diffusion cause poor conductivity
Solution Approach 1:
The connection structure is segmented into multiple functional zones: a first connection area with conductive members for electrical connection, and a second connection area with detection conductors for quality detection. This segmentation allows independent optimization of conduction and detection functions, ensuring reliable conductivity while enabling manufacturing quality control.
Solution Approach 2:
The detection conductor is pre-configured in the second connection area to enable preliminary detection of conduction quality before final product completion. This preliminary action allows alignment and conductivity issues to be detected early, preventing defective products from proceeding to final assembly.
2Reliability
If alignment is improved to ensure good conductivity, then manufacturing complexity increases
Solution Approach 1:
The connection structure incorporates multi-functionality by integrating both conduction and detection functions into a unified design. The detection conductor serves dual purposes: it detects conduction quality while also providing a reference for alignment verification, reducing the need for separate complex alignment mechanisms.
Solution Approach 2:
The detection conductor enables self-detection of conduction quality within the manufacturing process itself. The structure performs its own quality verification through the detection area, eliminating the need for external complex testing equipment and simplifying the overall manufacturing system.
3Reliability
If detection capabilities are added to verify conduction, then manufacturing time increases
Solution Approach 1:
The detection function is merged with the conduction structure itself rather than being a separate post-processing step. The detection conductor is integrated into the connection area during the same manufacturing process, allowing conduction and detection to occur simultaneously without adding sequential manufacturing steps.
Solution Approach 2:
The detection conductor enables continuous monitoring of conduction quality throughout the manufacturing process. Rather than interrupting production for discrete testing, the detection system operates continuously alongside the conduction function, maintaining productivity while ensuring quality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method effectively determines whether the common electrode line and layer are normally conducted, preventing display abnormalities by ensuring proper signal transmission and reducing issues like gamma abnormalities and crosstalk.
Implementation Method 1
The conductive members located on the conductive sub-region are respectively in contact with the common electrode line and the common electrode layer, and configured for conducting the common electrode line and the common electrode layer
Implementation Method 2
The conductive members located on the detection sub-region are respectively in contact with the common electrode layer and a detection pad, and configured for conducting the common electrode layer and the detection pad
Data Source
AI summary
The liquid crystal display panel includes a color filter substrate providing with a common electrode layer t; and an array substrate arranged in cell alignment with the color filter substrate and providing with a common electrode line, the array substrate includes a display area and a peripheral area including a plurality of connection areas located on the connection areas and arranged between the color filter substrate and the array substrate; at least one connection area includes a conductive sub-region and a detection sub-region, and the conductive members located on the conductive sub-region are respectively in contact with the common electrode line and the common electrode layer for conducting the common electrode line and the common electrode layer; and the conductive members located on the detection sub-region are respectively in contact with the common electrode layer and a detection pad for conducting the common electrode layer and the detection pad.