Woven Touch Sensor Structure Reducing Line Count
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Solution Overview
Problem
Touch display devices face challenges in reducing the number of touch lines and touch channels while maintaining accurate touch sensing, as the increase in touch panel size leads to more complex manufacturing and higher costs, and the difference in areas between touch electrodes affects sensitivity.
Innovation Solution
A touch display device with a touch sensor structure that includes a configuration of horizontal and vertical electrodes connected by bridge parts and separation electrodes, reducing the number of touch lines and channels while maintaining accuracy through a woven-type touch sensor structure that minimizes overlap areas and parasitic capacitances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the size of the touch panel is increased, then the display area is improved, but the number of touch electrodes and touch lines increases, making manufacturing more complicated and increasing cost
Solution Approach 1:
Multiple touch electrodes are electrically connected and grouped into a single touch electrode group, which is then connected to the touch driving circuit through one touch line. This merging approach allows multiple electrodes to share a common signal line, reducing the total number of touch lines required while maintaining the ability to sense touches across a larger display area
2Area of stationary object
If the number of touch channels is increased to support more touch electrodes, then touch sensing coverage is improved, but the touch driving circuit becomes more complicated and manufacturing cost increases
Solution Approach 1:
A single touch line serves multiple touch electrodes within a touch electrode group, making the touch line multi-functional. This universal approach allows the touch driving circuit to control and sense multiple electrodes through fewer channels, reducing circuit complexity while maintaining comprehensive touch sensing coverage across the display panel
3Adaptability or versatility
If there is a large difference in areas between horizontal and vertical touch electrodes, then electrode layout flexibility is improved, but touch sensitivity deteriorates
Solution Approach 1:
The invention adjusts the physical dimensions and geometric parameters of touch electrodes to minimize the area difference between horizontal and vertical electrodes. By optimizing electrode width, length, and spacing parameters, the system achieves balanced capacitive coupling for both horizontal and vertical electrodes, thereby maintaining high touch sensitivity while preserving layout flexibility for different display configurations
Data Source
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AI summary
The present disclosure relates to touch display devices which include a first horizontal electrode including a plurality of first electrode parts spaced apart from one another in a horizontal direction and a plurality of first bridge parts connecting the plurality of first electrode parts; a second horizontal electrode including a plurality of second electrode parts spaced apart from the first horizontal electrode in a vertical direction and spaced apart from one another in the horizontal direction and a plurality of second bridge parts connecting the plurality of second electrode parts; a third horizontal electrode including a plurality of third electrode parts spaced apart from the second horizontal electrode in the vertical direction and spaced apart from one another in the horizontal direction and a plurality of third bridge parts connecting the plurality of third electrode parts; a first horizontal touch line electrically connected to the first horizontal electrode and disposed to extend in the vertical direction; a second horizontal touch line electrically connected to the second horizontal electrode and disposed to extend in the vertical direction; and a third horizontal touch line electrically connected to the third horizontal electrode and disposed to extend in the vertical direction; a plurality of first separation electrodes; a plurality of second separation electrodes; a first vertical touch line; and a second vertical touch line.