Touch Panel Conductive Bridge for Capacitance
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Solution Overview
Problem
Capacitive touch panels have limited touch sensitivity due to the limited interaction area between electrode chains, which affects the accuracy of touch detection.
Innovation Solution
The design includes spaced-apart first and second electrode chains with cross-insulated conductive bridges that are electrically connected to the first electrode chain and extend into the contour region of the second electrode chain, increasing the interaction area and mutual capacitance for improved touch detection sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If electrode chains are spaced apart to reduce complexity, then device complexity is reduced, but interaction area between electrode chains decreases
Solution Approach 1:
The conductive bridge extends in the vertical dimension into the contour region of the second electrode chain, transforming a two-dimensional planar arrangement into a three-dimensional structure. This allows the first electrode chain to interact with the second electrode chain through both horizontal spacing and vertical extension, increasing interaction area without requiring complex lateral arrangements.
Solution Approach 2:
The conductive bridge is nested within the contour region of the second electrode chain, allowing the first electrode chain to penetrate and interact with the spatial envelope of the second electrode chain. This nesting arrangement maximizes the interaction area by utilizing the three-dimensional space occupied by the second electrode chain's contour region.
2Manufacturing precision
If electrode chains are spaced apart to improve ease of manufacture, then manufacturing precision requirements are reduced, but touch detection sensitivity decreases
Solution Approach 1:
By extending the conductive bridge vertically into the contour region of the second electrode chain, the design compensates for reduced horizontal interaction area caused by larger spacing. The three-dimensional extension maintains sufficient mutual capacitance for sensitive touch detection while allowing more relaxed positioning tolerances during manufacturing.
3Area of moving object
If conductive bridge extends into contour region of second electrode chain, then interaction area increases, but device complexity increases
Solution Approach 1:
The conductive bridge is designed as a separate, distinct component that connects to the first electrode chain and extends independently into the contour region of the second electrode chain. This segmentation allows for simplified manufacturing processes where the bridge can be formed as a separate layer or structure, reducing overall device complexity despite the increased interaction area.
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 configuration enhances the sensitivity of touch detection by increasing the interaction area between electrode chains, leading to more accurate positioning of touch points on capacitive touch panels.
Implementation Method 1
the conductive bridge extending into a contour region of the second electrode chain to increase the interaction area between the first electrode chain and the second electrode chain, thereby changing the mutual capacitance between the first electrode chain and the second electrode chain
Data Source
AI summary
The invention provides a touch panel, manufacturing method for touch panel and a touch device. The touch panel comprises: a substrate; a plurality of first electrode chains disposed on the substrate, spaced apart, each of the first electrode chains comprising a plurality of first electrodes; a plurality of second electrode chains disposed on the substrate, spaced apart, each of the second electrode chains comprising a plurality of second electrodes, the second electrode chains being cross-insulated from the first electrode chains; at least a conductive bridge, electrically connected to the first electrode chain, the conductive bridge extending into a contour region of the second electrode chain and insulated from the second electrode chain. The invention improves the mutual capacitance between the first electrode chain and the second electrode chain to provide higher touch detection accuracy.