Touch Display Panel Electrode Segmentation for High-Frequency Charging
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Solution Overview
Problem
Existing touch display panels face issues of touch abnormality and insufficient charging of electrodes when operating at high frequencies, due to the sharing of mask plates leading to oversized touch electrodes that exceed the maximum design area.
Innovation Solution
A touch display panel design that includes a substrate with a display region, where three touch electrodes (first, second, and third) are arranged adjacently, with the second touch electrode electrically connected to the first and the third touch electrode electrically disconnected from the second. The area of the third touch electrode is greater than that of the first and second touch electrodes, ensuring they meet the minimum and maximum design area requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If mask plates are shared for forming touch electrodes in display devices with different openings, then manufacturing cost is reduced, but touch electrode area exceeds maximum design area causing touch abnormality
Solution Approach 1:
The touch electrode structure is segmented into three separate electrodes (first, second, and third touch electrodes) with distinct area controls. The first and second touch electrodes are electrically connected while the third is electrically disconnected, allowing independent area optimization for each segment to prevent excessive total area while maintaining manufacturing efficiency
Solution Approach 2:
Different regions of the touch electrode structure are given different qualities: the first and second touch electrodes share electrical connection for common functionality, while the third touch electrode is electrically disconnected to provide localized area control. This allows each region to be optimized for its specific function while maintaining overall system performance
2Area of stationary object
If touch electrode area is increased to cover larger display regions, then touch coverage is improved, but charging of electrodes becomes insufficient at high frequency
Solution Approach 1:
The large touch electrode area is segmented into three separate electrodes (first, second, and third) with the third being electrically disconnected. This segmentation reduces the capacitive load on each electrical connection, enabling sufficient charging and discharging at high frequencies while maintaining comprehensive touch coverage across the display region
Solution Approach 2:
The electrical connection state is made dynamic: the first and second touch electrodes are electrically connected for coordinated operation, while the third touch electrode is electrically disconnected to reduce overall capacitive load. This dynamic configuration allows the system to maintain large total electrode area for comprehensive coverage while ensuring high-frequency charging capability
3Adaptability or versatility
If touch electrode area varies in different regions, then display adaptability is improved, but display quality deteriorates due to brightness difference
Solution Approach 1:
Different regions are assigned different electrode configurations: the first and second touch electrodes are electrically connected for uniform response in their region, while the third touch electrode is electrically disconnected to provide localized adaptation to irregular display regions. This local quality differentiation maintains brightness uniformity in standard regions while enabling adaptability to non-standard display geometries
Data Source
AI summary
The invention provides a touch display panel and a manufacturing method therefor. The touch display panel comprises a substrate; a display region disposed on the substrate; a first touch electrode disposed in the display region; a second touch electrode disposed in the display region; and a third touch electrode disposed in the display region, the first touch electrode, the second touch electrode and the third touch electrode arranged adjacently, and the third touch electrode and the second touch electrode electrically disconnected; wherein the second touch electrode is electrically connected to the first touch electrode, and an area of the third touch electrode is greater than an area of the first touch electrode and/or an area of the second touch electrode.