Zigzag Touch Panel Electrodes for Better Visibility and Low Distortion
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Solution Overview
Problem
Existing capacitive touch panels suffer from reduced visibility due to the interference of sensing electrodes and sensor signal lines, which can cause image distortion and noise.
Innovation Solution
The sensing electrodes and sensor signal lines are formed in a repeated zigzag pattern using transparent conductive materials like ITO, CNTs, ATO, or IZO, with specific sub-pattern connections to reduce visibility and noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensing electrodes and sensor signal lines are formed in conventional patterns, then touch sensitivity and resolution are achieved, but visibility is reduced due to image distortion and noise
Solution Approach 1:
The patent applies curvature by forming sensing electrodes and sensor signal lines in zigzag patterns instead of straight lines. This curved configuration reduces the projected area of the conductors when viewed from the display surface, minimizing image distortion and improving visibility while maintaining touch sensitivity through adequate electrode coverage
Solution Approach 2:
The patent transitions from one-dimensional straight line patterns to two-dimensional zigzag patterns. This dimensional change allows the conductors to achieve longer effective length for signal transmission while occupying less projected area, thereby reducing visibility issues without compromising touch detection capability
2Measurement precision
If sensing electrodes are made larger to improve touch detection, then sensitivity increases, but visibility deteriorates due to increased pattern area
Solution Approach 1:
By forming electrodes in zigzag patterns, the patent increases the effective conductor length within a smaller projected area. The curved path allows adequate electrode coverage for sensitive touch detection while the zigzag configuration reduces the visual footprint when viewed from the display surface
3Reliability
If sensor signal lines are extended to cover larger areas, then signal transmission improves, but visibility and noise interference worsen
Solution Approach 1:
The zigzag configuration of sensor signal lines allows extended conductor length for reliable signal transmission across the touch panel while reducing the projected area. This minimizes visual interference and noise while maintaining adequate electrical connectivity for accurate touch signal transmission
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
The zigzag pattern design improves visibility by minimizing the pattern area and reduces image distortion, enhancing the overall appearance of the touch panel.
Implementation Method 1
a plurality of sensing electrodes formed of a transparent conductive material to generate a touch capacitance (Ct) upon approach or touch by a touch means
Data Source
AI summary
The present invention relates to a touch panel for detecting capacitive touch input from a human finger or a touch input tool having similar conductive characteristics thereto, and more particularly, to a touch panel having a sensing electrode with improved visibility. The touch panel having a sensing electrode with improved visibility includes: a plurality of sensing electrodes formed of a transparent conductive material to generate a touch capacitance (Ct) upon approach or touch by a touch means; and a plurality of sensor signal lines transmitting a touch signal generated by the sensing electrodes to a touch IC, wherein both the sensing electrodes and the sensor signal lines are formed in a repeated zigzag shape.