Touch Electrode Layout for Large-Panel Sensing Accuracy
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Solution Overview
Problem
The increasing size of display panels leads to an increased load on the touch sensor structure, which can result in a decrease in touch sensing accuracy.
Innovation Solution
A touch display device with a specific arrangement of X-touch and Y-touch electrode lines and routing lines, including dummy electrodes, is designed to distribute the load more efficiently across sub-areas of the display panel, reducing the overall load on the touch sensor structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the size of the display panel is increased, then the display area is improved, but the load on the touch sensor structure increases and touch sensing accuracy deteriorates
Solution Approach 1:
The active area is divided into multiple sub-areas, with each sub-area containing a separate set of touch electrode lines. This segmentation distributes the touch sensing load across multiple independent regions, preventing the entire structure from becoming overloaded as the display size increases, thereby maintaining touch sensing accuracy across large display areas.
Solution Approach 2:
Different regions of the display panel are configured with different numbers of touch electrode lines. Boundary sub-areas have a different number of X-touch electrode lines compared to central sub-areas, optimizing the distribution of sensing elements to maintain uniform touch sensitivity across the entire large display area without overloading any single region.
2Area of stationary object
If the size of the display panel is increased, then the display area is improved, but the load on the touch sensor structure increases
Solution Approach 1:
The touch sensor structure is segmented into multiple independent sets of electrode lines corresponding to different sub-areas. This segmentation allows the total load to be distributed across multiple lighter components rather than one heavy structure, enabling large display areas while keeping the touch sensor structure load manageable.
Solution Approach 2:
Different sub-areas are equipped with different numbers of touch electrode lines based on their specific requirements. Boundary sub-areas have fewer X-touch electrode lines compared to central sub-areas, optimizing the distribution of sensing elements to reduce overall load while maintaining sufficient touch sensitivity across the entire 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 arrangement improves the accuracy of touch sensing by minimizing the load on the touch sensor structure and maintaining sensitivity across the display panel.
Implementation Method 1
The display device can drive the plurality of touch electrodes, and can sense a touch of the user by detecting a change of a capacitance generated when the user touches the display panel.
Data Source
AI summary
The present disclosure is directed to a touch display device that is capable of reducing a load of a touch sensor structure disposed in a display panel and improving the accuracy of touch sensing capabilities of the touch display device. In one aspect, touch electrode lines disposed on an active area are disposed to be separated into a plurality of sub-areas. A number of touch routing lines connected to the touch electrode lines are disposed on the active area, thus a touch sensor structure with a reduced load can be provided while minimizing an increase of a non-active area due to an arrangement of the touch routing lines.