Touch Display Device Electrode Segmentation
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Solution Overview
Problem
Existing touch display devices face challenges in improving touch sensing performance without compromising image display performance, as the integration of touch electrodes with the display panel is complex and often reduces the effectiveness of both functions.
Innovation Solution
A touch display device is designed with a touch sensor structure that incorporates X-touch and Y-touch electrodes arranged along specific directions, with boundary touch electrodes having distinct end portion shapes to enhance touch sensing performance while maintaining image display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch electrodes are integrated into the display panel, then touch sensing function is enabled, but image display performance deteriorates
Solution Approach 1:
The touch electrode is divided into multiple segments including a first electrode segment, a second electrode segment, and a third electrode segment. These segments are arranged in different regions (first region, second region, third region) of the display panel, allowing the touch sensing function to be distributed across multiple locations rather than requiring a single large electrode that would block light emission.
Solution Approach 2:
Different electrode segments are positioned in different regions of the display panel with specific arrangements optimized for their local contexts. The first electrode segment is in the first region, the second electrode segment is in the second region, and the third electrode segment is in the third region, allowing each segment to contribute to touch sensing while minimizing impact on local light emission quality.
2Area of stationary object
If the active area of the display panel is increased, then display size is improved, but touch electrode load increases
Solution Approach 1:
The touch electrode is segmented into multiple parts (first electrode segment, second electrode segment, third electrode segment) distributed across different regions of the enlarged active area. This segmentation reduces the load on any single electrode by distributing the capacitive sensing function across multiple smaller segments, making it feasible to maintain touch sensitivity in larger display panels.
Solution Approach 2:
The touch electrode structure extends into multiple dimensions by arranging electrode segments in different regions and directions. The first electrode segment, second electrode segment, and third electrode segment are positioned to form a multi-dimensional sensing network that covers the enlarged active area while maintaining manageable electrode dimensions and reduced individual electrode load.
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
The proposed solution improves touch sensing performance by reducing the load on touch electrodes and maintaining image display quality, even as the active area of the display panel increases.
Implementation Method 1
The display devices can drive the plurality of touch electrodes, and can sense the touch of the user by detecting a change of a capacitance generated when the user touches the display panel.
Data Source
AI summary
Embodiments of the present disclosure are related to a touch display device. As a shape of a touch electrode adjacent to a boundary of an active area is implemented according to an arrangement structure of a light-emitting area of a subpixel, a touch sensing structure can be disposed to be suitable to an image display structure of a display panel.