Capacitive Touch Panel Diagonal Pad Merging Reduces Signal Channels
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Solution Overview
Problem
Conventional capacitive touch panels require a large number of signal transmission channels, which increases with the size of the panel, leading to higher costs and complex layouts.
Innovation Solution
The touch panel design arranges touch pads in an array with diagonal connections, allowing some pads to share signal transmission channels, reducing the overall number of channels needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of signal transmission channels is increased to cover larger touch panel areas, then the touch detection capability is improved, but the device complexity and production cost increase
Solution Approach 1:
The patent merges adjacent touch pads into groups that share common signal transmission channels. Specifically, multiple touch pads are connected to the same row signal line and column signal line, allowing them to share the signal transmission infrastructure. This reducing technique enables the touch panel to maintain comprehensive touch detection capability across large areas while significantly reducing the total number of signal transmission channels required, thereby lowering device complexity and production costs
2Reliability
If the number of signal transmission channels is increased to cover larger touch panel areas, then the touch detection capability is improved, but the layout area required increases
Solution Approach 1:
By grouping touch pads and having multiple pads share common row and column signal lines, the patent reduces the number of independent signal transmission paths needed. This merging approach allows the signal transmission channels to be arranged more compactly, reducing the overall layout area required for the channel infrastructure while still maintaining the ability to detect touches across the entire large panel area
3Reliability
If the number of signal transmission channels is increased, then the touch detection capability is improved, but the production cost increases
Solution Approach 1:
The patent implements a signal sharing architecture where multiple touch pads are electrically connected to common row and column signal lines. This merging of signal paths reduces the total number of independent channels that need to be manufactured and routed through the panel. Consequently, the production cost is reduced due to fewer manufacturing steps, less material usage for channel infrastructure, and simplified assembly processes, while the touch detection capability remains intact through the shared channel architecture
Data Source
AI summary
The touch panel includes a plurality of touch pads arranged in an array on the touch panel. Each of the touch pads are arranged in N columns and M rows, the touch pad in the ith column and in the jth row is coupled to the touch pad in the (i−1)th column and in the (j−1)th row and the touch pad in the (i+1)th column and in the (j+1)th row, or the touch pad in the ith column and in the jth row is coupled to the touch pad in the (i+1)th column and in the (j−1)th row and the touch pad in the (i−1)th column and in the (j+1)th row.