Touchscreen Panel Overlapping Touch Lines for Large Displays
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Solution Overview
Problem
Large-sized touch display devices face challenges in maintaining high touch sensitivity and reducing the resistance of touch lines while minimizing the reduction in the degree of opening, due to the increased number of touch electrodes and lines required.
Innovation Solution
The touchscreen panel design includes first and second touch electrodes and lines, where the first touch lines are shorter and located closer to the touch sensing circuit, overlapping with second touch lines, and additional touch lines are connected to second touch electrodes, reducing the overall area and resistance while maintaining touch sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large number of touch electrodes and touch lines are provided to achieve high touch sensitivity in large-size touch display devices, then touch sensitivity is improved, but the degree of opening is reduced
Solution Approach 1:
The patent merges first touch lines and second touch lines by making them overlap in the planar view, allowing both sets of lines to share the same physical space. This combining approach enables the connection of multiple touch electrodes without proportionally increasing the total line area, thereby maintaining high touch sensitivity while preserving the degree of opening of the display device.
Solution Approach 2:
The patent utilizes the vertical dimension by disposing touch lines on different layers (first touch lines on a first layer, second touch lines on a second layer). This dimensional transition allows the lines to overlap in the planar view while being physically separated in the vertical direction, enabling high touch sensitivity without compromising the degree of opening.
2Area of stationary object
If the area of touchscreen panel is increased to provide large size touch display device, then display size is improved, but the resistance of touch lines is increased
Solution Approach 1:
By merging first touch lines and second touch lines through overlapping arrangement, the patent reduces the total length of conductive paths required to connect all touch electrodes. This merging effect shortens the touch line length even in large-size panels, thereby reducing resistance and maintaining signal reliability.
Solution Approach 2:
The patent transitions touch lines to multiple layers, allowing shorter vertical connections between layers. This dimensional change reduces the overall path length compared to single-layer long-distance connections, effectively reducing resistance in large-size touch display devices.
3Measurement precision
If multiple touch lines are disposed to connect multiple touch electrodes, then touch sensitivity is improved, but the degree of opening is reduced
Solution Approach 1:
The patent combines multiple touch lines (first and second touch lines) into overlapping paths, allowing them to occupy the same planar space. This merging enables the connection of multiple touch electrodes without proportionally increasing the area occupied by touch lines, thereby maintaining high touch sensitivity while preserving the degree of opening.
Solution Approach 2:
The patent utilizes vertical layering to dispose touch lines on different layers, allowing them to overlap in the planar view. This dimensional approach enables multiple touch lines to coexist without increasing the planar area they occupy, maintaining both touch sensitivity and degree of opening.
Data Source
AI summary
A touchscreen panel and a touch display device including the same are discussed. A plurality of touch lines disposed on the touchscreen panel include first touch lines and second touch lines. A portion or entirety of each of first touch lines connected to the first touch electrodes overlaps a corresponding one of second touch lines connected to the second touch electrodes. The degree of opening of the touchscreen panel is not lowered by the touch lines.