Input Sensing Electrode Layout With Multi-Layer Touch Routing
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Solution Overview
Problem
Existing display devices face challenges in efficiently integrating input sensing parts with display panels, particularly in managing the layout and connectivity of sensing electrodes and lines to optimize touch sensitivity and reduce visual interference.
Innovation Solution
The display device incorporates a novel design with first and second sensing electrodes crossing each other, connected by multi-layer and single-layer lines, where the multi-layer lines extend in one direction and single-layer lines bend in a different direction, maintaining consistent gaps between bent portions to enhance touch sensitivity and minimize visual impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sensing lines are disposed in the non-active area adjacent to the active area, then the input sensing part can be integrated with the display panel, but the layout complexity and visual interference increase
Solution Approach 1:
The patent transitions from a planar layout to a three-dimensional multi-layer structure for the sensing lines. The first sensing line is disposed in a first layer while the second sensing line is disposed in a second layer above the first layer, allowing both lines to be electrically connected to sensing electrodes in the active area without occupying the same spatial plane, thus reducing layout complexity and visual interference.
Solution Approach 2:
The sensing lines are nested within the display panel structure by positioning them in different layers. The first sensing line and second sensing line are stacked vertically, with the second sensing line disposed over the first sensing line, creating a nested arrangement that efficiently utilizes space and reduces interference between adjacent lines.
2Measurement precision
If multiple sensing lines are disposed to connect to sensing electrodes, then touch sensitivity is improved, but visual interference and aesthetic integrity are compromised
Solution Approach 1:
The patent resolves visual interference by moving one of the sensing lines to a different vertical dimension. The second sensing line is disposed in a second layer above the first sensing line, allowing both lines to function simultaneously without occupying the same visual plane, thus maintaining aesthetic integrity while preserving touch sensitivity.
Solution Approach 2:
The patent introduces asymmetry in the vertical arrangement of sensing lines, with the first sensing line in the first layer and the second sensing line in the second layer. This asymmetric vertical stacking allows the lines to be electrically distinct while visually separated, reducing interference and improving overall aesthetics.
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 design improves touch sensitivity and reduces visual interference by optimizing the layout of sensing electrodes and lines, enhancing user interaction while maintaining the aesthetic integrity of the display.
Implementation Method 1
A first multi-layer line is electrically connected to the second sensing electrode. The first multi-layer line includes a first line and a second line disposed over the first line.
Data Source
AI summary
An input sensing part includes a first sensing electrode, a second sensing electrode that crosses the first sensing electrode, a first sensing line electrically connected to the first sensing electrode, a first multi-layer line that is electrically connected to the second sensing electrode and that includes a first line and a second line disposed over the first line, a first single-layer line that extends from one of the first and second lines, and a second single-layer line that is disposed in a different layer from the first single-layer line and electrically connected to the first single-layer line and that has a different line width from the first single-layer line.