Diagonal Touch Electrode Matrix for Reduced Line Count
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Solution Overview
Problem
Touch display devices face increased complexity and cost in manufacturing due to the need for a large number of touch electrodes and corresponding touch lines, which complicates panel manufacturing and increases costs, while also affecting transmittance and image uniformity.
Innovation Solution
A touch display device design that reduces the number of touch lines and touch channels by arranging unit electrodes in a matrix form with diagonal connections, allowing for a woven-type touch sensor structure where unit electrodes are electrically connected in diagonal directions, reducing the number of touch lines and improving transmittance by embedding the touch panel in the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of touch electrodes is increased to improve touch sensing coverage, then the touch sensing capability is improved, but the number of touch lines and touch channels increases, leading to increased manufacturing complexity and cost
Solution Approach 1:
The touch panel is divided into multiple regions with different touch sensing requirements. Different touch electrode configurations are applied to different regions: a first touch electrode configuration is used in a first region, while a second touch electrode configuration is used in a second region. This segmentation allows each region to be optimized independently, reducing the overall complexity while maintaining comprehensive touch sensing capability across the entire panel.
2Measurement precision
If the number of touch lines is increased to connect more touch electrodes, then the touch sensing resolution is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
Multiple touch electrodes are electrically connected in groups to form combined touch sensing elements. This merging approach reduces the total number of individual touch lines required while maintaining adequate touch sensing resolution. The combined electrodes work together to detect touch events, achieving a balance between resolution and manufacturing simplicity.
3Measurement precision
If more touch electrodes are used to improve touch detection accuracy, then the touch detection accuracy is improved, but the transmittance of the display panel decreases
Solution Approach 1:
Different touch electrode densities and configurations are applied to different regions of the display panel based on local requirements. Regions requiring high touch detection accuracy use denser electrode configurations, while regions where transmittance is prioritized use sparser configurations. This local optimization ensures that touch detection accuracy is sufficient where needed without unnecessarily compromising overall panel transmittance.
Data Source
AI summary
Embodiments of the present disclosure relate to touch display devices, and more particularly, to a touch display device capable of reducing the number of touch lines and touch channels through a structure in which touch electrodes are arranged in diagonal directions.