Segmented Touch Electrode Layout for Large Display Panels
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Solution Overview
Problem
As the size of display panels increases, the load on the touch sensor structure in touch display devices becomes heavier, leading to degraded performance in touch sensing.
Innovation Solution
The implementation of a touch display device with a substrate having an active area divided into sub-areas, where touch electrodes are separately disposed and electrically connected across sub-areas, and touch routing lines are positioned to reduce load and enhance touch sensing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the size of display panel increases, then the display area is improved, but the load on touch sensor structure increases and touch sensing performance deteriorates
Solution Approach 1:
The touch sensor structure is divided into multiple independent sensing regions corresponding to different sub-areas of the display panel. Each sub-area has its own set of touch electrodes and routing lines, allowing the large display panel to be segmented into manageable sensing zones that can be processed independently, thereby maintaining touch sensing performance across the entire large display area.
Solution Approach 2:
The patent utilizes the non-active area (border region) of the display panel to route touch electrode connections in a direction perpendicular to the main display area. This dimensional approach allows routing lines to be positioned outside the active display region, reducing interference with the touch sensing electrodes in the active area and maintaining sensing performance while supporting larger display sizes.
2Measurement precision
If touch electrodes are densely arranged to improve touch sensing resolution, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The touch electrode array is segmented into multiple groups corresponding to different sub-areas, with each group having its own routing lines. This segmentation reduces the complexity of connecting all electrodes by organizing them into manageable groups that can be routed through the non-active area, while maintaining high density and resolution in the active sensing region.
Solution Approach 2:
The non-active area serves as an intermediary region that facilitates the connection between densely arranged touch electrodes in the active area and the external circuitry. By providing additional space for routing lines and connection structures in the non-active area, the patent reduces the complexity of electrode connections without compromising the density and resolution of the sensing electrodes in the active display area.
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 the load on the touch sensor structure and enhances touch sensing performance by distributing the touch electrodes and routing lines across multiple sub-areas, thereby maintaining effective touch recognition on large-area display panels.
Implementation Method 1
The display device may drive the plurality of touch electrodes, detect a change in capacitance when the user touches the display panel, and recognize the touch.
Data Source
AI summary
Embodiments of the disclosure may provide a touch display device in which in a structure in which touch electrodes are separately disposed in a first sub area and a second sub area of an active area, X-touch electrodes disposed in the first sub area and the second sub area are electrically connected with each other, and Y-touch electrodes are electrically separated from each other. It is possible to reduce the load by a structure in which touch electrodes are divided for each sub area and to reduce the number of channels by driving the X-touch electrodes in the first sub area and second sub area by the same number of channels.