Touch Electrode Layout for Higher Capacitance and Glove Detection
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Solution Overview
Problem
Existing touch display panels have a small effective touch area, insufficient touch sensitivity, and poor recognition accuracy, particularly under conditions such as wearing gloves or gesture recognition, which affects user experience.
Innovation Solution
A touch electrode design with multiple interconnected subunits and bridging parts, forming both touch driving and detection channels, and a touch module with an array of electrodes, enhancing the effective touch area and capacitance value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple pattern structure is used, then the device complexity is reduced, but the effective touch area becomes small and touch sensitivity is insufficient
Solution Approach 1:
The touch electrode is divided into multiple subunits (first touch subunit, second touch subunit, third touch subunit) with different functions. The first touch subunit forms driving channels, the second touch subunit forms detection channels, and the third touch subunit enhances capacitance. This segmentation allows each subunit to be optimized for its specific function while collectively increasing the effective touch area and sensitivity without excessive overall complexity.
Solution Approach 2:
The patent introduces a multi-layered electrode structure with subunits arranged in different spatial configurations. The first, second, and third touch subunits are positioned at different locations and orientations, creating a three-dimensional electrode architecture that increases the effective touch area beyond what a simple two-dimensional pattern could achieve.
2Device complexity
If a simple pattern structure is used, then the device complexity is reduced, but the recognition accuracy becomes poor
Solution Approach 1:
By segmenting the touch electrode into specialized subunits (first touch subunit for driving, second touch subunit for detection, third touch subunit for capacitance enhancement), the system achieves better gesture recognition accuracy. Each subunit contributes to different aspects of touch detection, enabling more precise measurement of touch parameters and improved recognition of complex gestures including those worn with gloves.
Solution Approach 2:
Different regions of the touch electrode are given different properties through the subunit design. The first touch subunit has properties optimized for driving signals, the second touch subunit for detection sensitivity, and the third touch subunit for capacitance. This local differentiation of electrode properties throughout the touch panel enables improved overall recognition accuracy without requiring complex processing throughout the entire structure.
3Ease of manufacture
If the touch electrode structure is simplified, then the manufacturing process becomes easier, but the touch sensitivity becomes insufficient
Solution Approach 1:
The segmented subunit structure enables modular manufacturing where each subunit can be fabricated using standardized processes. The first, second, and third touch subunits can be formed through sequential deposition and patterning steps that are compatible with existing touch panel manufacturing lines, maintaining ease of manufacture while achieving superior touch sensitivity through the specialized functionality of each subunit.
Solution Approach 2:
The patent optimizes specific parameters of each subunit to enhance touch sensitivity. The third touch subunit is designed with specific geometric parameters and material properties that increase capacitance value. The gaps and connecting parts between subunits are dimensioned to optimize electrical coupling and signal transmission, thereby improving touch sensitivity without requiring complex manufacturing processes.
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
Increases the effective touch area and recognition accuracy, improving sensitivity and expanding application scenarios, especially in challenging conditions like wearing gloves or gesture recognition.
Implementation Method 1
increasing the single point capacitance value... improving recognition accuracy, sensitivity and touch performance
Data Source
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AI summary
Provided in the present application are a touch electrode, a touch module and a touch display panel. The touch electrode at least comprises a first touch subunit, a second touch subunit and a third touch subunit, the first touch subunit surrounding the second touch subunit and being provided with a first notch and a second notch so as to divide the first touch subunit into a first extending portion and a second extending portion, and the second touch subunit surrounding the third touch subunit and being provided with a third notch and a fourth notch so as to divide the second touch subunit into a third extending portion and a fourth extending portion; a first connection portion, penetrating through the third notch and connected to the first extending portion and the third touch subunit; a second connection portion, penetrating through the fourth notch and connected to the second extending portion and the third touch subunit, so that the first and second extending portions are electrically connected; a third connection portion and a fourth connection portion, respectively penetrating through the first notch and the second notch and extending out of the area enclosed by the first touch subunit; and a first bridging portion. The touch electrode can improve the touch performance, recognition precision and sensitivity.