Touch Display Panel Electrode Segmentation for Crosstalk Reduction
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Solution Overview
Problem
Conventional In-cell touch display panels suffer from poor touch identification accuracy due to interference from finger edges and crosstalk from lateral leads, leading to incorrect identification of touch regions.
Innovation Solution
The touch display panel is designed with first and second electrode groups arranged in different layers, where the second electrodes are connected to the peripheral region through second leads, and the first electrodes serve as touch scanning or sensing electrodes, while the second electrodes serve as touch scanning or sensing electrodes, alternately arranged to minimize overlap and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional In-cell touch display panels use time division multiplexing of a common electrode layer, then the manufacturing process is simple and integrated, but the touch identification accuracy deteriorates due to interference from finger edges and crosstalk from lateral leads
Solution Approach 1:
The electrode layer is segmented into multiple independent electrode groups (first electrode groups and second electrode groups) with different arrangements and functions. Each electrode group can be independently controlled, allowing separate scanning and sensing operations that reduce crosstalk and improve touch identification accuracy while maintaining manufacturing integration
Solution Approach 2:
Different regions of the electrode layer are assigned different functions and structures. The first electrode groups use one configuration while the second electrode groups use another configuration, optimizing each region for its specific function (scanning vs. sensing) to minimize interference and improve local measurement precision
2Measurement precision
If electrode groups are arranged to reduce interference, then touch identification accuracy improves, but the device structure becomes more complex
Solution Approach 1:
The first and second electrode groups are merged into a single integrated electrode layer structure that can be manufactured using standard processes. Despite the functional segmentation, the physical integration maintains manufacturing simplicity while achieving the complexity needed for improved touch identification accuracy
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 reduces interference near the actual touch region, enhancing the accuracy of touch identification by minimizing both finger edge and lead crosstalk interferences, thereby improving the overall touch identification accuracy.
Implementation Method 1
the first electrodes and the second electrodes are disposed in different layers respectively, and projections of the second electrodes on the layer in which the first electrodes are disposed do not overlap with the first electrodes
Data Source
AI summary
The disclosure provides a touch display panel, a driving method and a touch display device. The panel includes: a plurality of first electrode groups arranged in a first direction and a plurality of second electrode groups arranged in a second direction, wherein each first electrode group includes a plurality of first electrodes arranged in the second direction, and each second electrode group includes a plurality of second electrode subgroups disposed adjacent to each other and arranged in the second direction, each of the second electrode subgroups including a plurality of second electrodes arranged in the first direction; and wherein the first and second electrodes are disposed in different layers respectively, and projections of the second electrodes on the layer in which the first electrodes are disposed do not overlap with the first electrodes and are alternately arranged with the first electrodes in both the first and second directions.