Touch Panel Electrode Density Variation for Edge Area Optimization
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Solution Overview
Problem
Existing touch panels waste resources and incur unnecessary costs due to uniform electrode density across all areas, despite varying touch accuracy requirements, with higher density channels being unnecessary in edge areas where touch frequency is lower.
Innovation Solution
A touch panel design with varying electrode density, where the arrangement density of electrodes in the central area is greater than in the edge area, optimizing electrode placement based on touch accuracy requirements to reduce unnecessary channels and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If uniform electrode density is used across the entire touch screen, then touch accuracy in edge areas is maintained, but resource waste and unnecessary costs occur due to excessive touch channels in low-touch-frequency areas
Solution Approach 1:
The patent applies local quality by configuring different electrode densities in different regions of the touch screen. The central area uses a first electrode density suitable for high touch accuracy requirements, while the edge area uses a second electrode density that is sparser and suitable for lower touch accuracy requirements. This resolves the contradiction by making the electrode distribution match the actual touch usage patterns, maintaining necessary touch accuracy where needed while reducing resource waste in areas where it is less critical.
2Measurement precision
If high density touch channels are deployed in edge areas, then touch accuracy requirement is met, but cost increases due to unnecessary touch channels
Solution Approach 1:
The patent implements local quality by differentiating the electrode density configuration between central and edge areas. In the central area where touch accuracy requirements are high, a denser electrode arrangement is used. In the edge area where touch accuracy requirements are lower and touch frequency is reduced, a sparser electrode arrangement is applied. This reduces the total number of touch channels while maintaining adequate touch accuracy, thereby reducing costs without sacrificing necessary performance.
3Ease of manufacture
If uniform electrode arrangement is used, then manufacturing simplicity is maintained, but utilization rate of touch channels is low in edge areas
Solution Approach 1:
The patent applies local quality by configuring different electrode densities in different regions. The central area uses a first electrode density that achieves high utilization rate for touch channels, while the edge area uses a second, sparser electrode density that matches the lower touch frequency and accuracy requirements. This improves overall touch channel utilization rate while maintaining reasonable manufacturing complexity through a structured regional division approach.
Data Source
AI summary
A touch panel and a display device are disclosed. The touch panel includes a first area and a second area, and further includes: a plurality of first electrodes located in the first area and a plurality of second electrodes located in the second area. An arrangement density of the first electrodes is greater than an arrangement density of the plurality of second electrodes.