Touch Panel Signal Line Height Variation for Visual Suppression
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Solution Overview
Problem
Conventional touch panels are visually noticeable due to the distinct heights of their signal lines, which can affect their appearance and functionality, especially in transparent display applications.
Innovation Solution
The touch panel design features first and second signal lines with different heights, where the second signal line is taller than the first, both disposed in the same layer, and covered by insulating layers to minimize visibility by reflecting light in similar paths, thus reducing visual recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If signal lines are made with uniform height, then manufacturing simplicity is improved, but visual recognition is worsened
Solution Approach 1:
The patent applies local quality by giving different heights to different signal lines (first signal line at first height, second signal line at second height greater than first height) while keeping them in the same layer. This localized variation in height creates similar light reflection paths for both signal lines, suppressing visual recognition of the touch sensor unit while maintaining manufacturing feasibility through controlled deposition processes.
2Object-affected harmful factors
If signal lines are made with different heights, then visual recognition is suppressed, but manufacturing complexity is worsened
Solution Approach 1:
The patent resolves manufacturing complexity by introducing a height dimension variation within the same layer rather than adding multiple layers. The first and second signal lines are formed in the same layer but at different heights from the substrate, achieving visual suppression through vertical positioning within the layer plane while avoiding the complexity of multi-layer alignment and registration.
3Object-affected harmful factors
If signal lines are made with different heights in the same layer, then visual recognition is suppressed through similar light reflection paths, but structural complexity is worsened
Solution Approach 1:
The patent applies parameter changes by varying the height parameter of signal lines (first height vs. second height) while maintaining them in the same layer. This parameter variation changes the light reflection characteristics, causing reflected light paths to be substantially similar and thereby suppressing visual recognition of the touch sensor unit without requiring complex multi-layer structures.
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 suppresses the visual recognition of the signal lines, enhancing the aesthetic appeal of touch panels in transparent displays while maintaining improved touch sensitivity and flexibility.
Implementation Method 1
the respective heights of the first and second signal lines enables incident light to be reflected from the first and second signal lines
Data Source
AI summary
A touch panel includes a substrate, a first signal line, and a second signal line. The first signal line extends on the substrate in a first direction and includes a first height from the substrate. The second signal line extends on the substrate in a second direction crossing the first direction and includes a second height from the substrate. The second signal line is disposed in the same layer as the first signal line. The second height is greater than the first height.