Touch Electrode Bending Portions for Capacitance Sensitivity
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Solution Overview
Problem
Current touch display devices have low sensitivity due to a small overlapping area between adjacent touch electrodes, which limits their ability to accurately detect user input.
Innovation Solution
The touch display substrate is designed with touch electrodes divided into pairs, each with multiple bending portions that overlap, increasing the overlapping area and enhancing sensitivity when applied to a touch display device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If touch electrodes are arranged adjacently in a conventional layout, then the device structure remains simple, but the overlapping area between adjacent touch electrodes is small resulting in low sensitivity
Solution Approach 1:
The touch electrodes are designed with bending portions that curve toward adjacent electrodes, creating a matched curved configuration. This curvature increases the overlapping area between adjacent touch electrodes compared to straight electrode designs, thereby enhancing capacitance change and touch sensitivity without complicating the overall device structure
2Length of stationary object
If the touch display device uses an integrated touch electrode structure, then the device thickness is reduced, but the overlapping area between adjacent touch electrodes becomes small leading to lower sensitivity
Solution Approach 1:
Within the integrated thin structure, the electrodes incorporate bending portions with curved configurations that face each other. This curved design maximizes the overlapping area between adjacent electrodes in the limited thickness space, ensuring high touch sensitivity is maintained despite the reduced device thickness
3Measurement precision
If conventional touch electrode designs are used, then manufacturing remains straightforward, but the capacitance influence from user touch is small resulting in low sensitivity
Solution Approach 1:
The bending portions with curved configurations can be integrated into standard electrode fabrication processes using conventional photolithography and patterning techniques. The curved design increases capacitance change during touch events, improving detection sensitivity while remaining compatible with existing manufacturing workflows
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 design significantly improves the sensitivity of touch display devices by increasing the user's influence on capacitance, allowing for more accurate touch detection while maintaining a compact form factor.
Implementation Method 1
the user's touch has a great influence on the capacitance formed by the first touch electrode and the second touch electrode
Data Source
AI summary
The present disclosure provides a touch display substrate and a touch display device, relates to a display field and solves a technical problem of lower sensibility of the touch display device. The touch display substrate comprises a plurality of touch electrodes, wherein the plurality of touch electrodes are divided into at least one touch electrode pair; each of the touch electrode pair includes first and second touch electrodes which are adjacent to each other; the first touch electrode comprises a first bending portion; the second touch electrode comprises second bending portion; and the second bending portions correspond to the first bending portions at positions. The touch display substrate according to the present disclosure may be applied to the touch display device.