Display Substrate Common Electrode Signal Uniformity
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Solution Overview
Problem
Display devices with touch functions experience poor display effects due to non-uniform common electrode signals across common electrode blocks, resulting from varying distances between through-holes and electrode boundaries.
Innovation Solution
A display substrate design where each common electrode block is connected by lead wires with specific portions extending in column and row directions, ensuring uniform signal distribution by passing through the geometric center of each block, thereby reducing display differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If through-holes are arranged correspondingly from left to right with respect to common electrode blocks, then the connection between common electrode blocks and lead wires is achieved, but the distance between each through-hole and boundary of the same common electrode block varies, resulting in non-uniform common electrode signal
Solution Approach 1:
The patent changes the symmetric arrangement (through-holes aligned with boundaries) to an asymmetric arrangement (through-holes at geometric centers), which resolves the signal uniformity issue while maintaining manufacturing feasibility
Solution Approach 2:
The patent changes the position parameter of through-holes from boundary-aligned positions to geometric center positions, which transforms the signal distribution characteristic from non-uniform to uniform across all common electrode blocks
2Device complexity
If through-holes are positioned at varying distances from boundaries, then the layout is simplified, but the common electrode signal is not uniform at each boundary, resulting in poor display effect
Solution Approach 1:
The patent modifies the position parameter of through-holes to be located at geometric centers of common electrode blocks, which ensures uniform signal distribution and improves display effect while keeping the overall layout simple
Data Source
AI summary
A display substrate, a display panel and a display device, relating to the field of display techniques, wherein a common electrode layer is placed in a display area and includes a plurality of common electrode blocks arranged in an array, n lead wires are provided corresponding to each column of the common electrode blocks, each lead wire includes a first portion, a second portion and a third portion, a first end of the first portion is electrically connected with the integrated circuit, a second end of the first portion is electrically connected with a first end of the second portion, a second end of the second portion is electrically connected with a first end of the third portion, a second portion of an ith lead wire passes a geometric center of an ith common electrode block and is electrically connected with the ith common electrode block thereof.