Touch Panel Electrode Connections for Wider, Lower-Resistance Channels
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Solution Overview
Problem
Existing touch panels face issues of poor connectivity and high resistance in the connection channels of adjacent touch electrode blocks due to narrow connection channels and 'character' design, leading to potential touch invalid regions and reduced touch performance.
Innovation Solution
The touch panel design includes first and second touch electrodes with protrusions and corner protrusions that are strategically modified in size and shape to increase the width of connection channels, enhance connectivity, and simplify manufacturing, while maintaining a larger mutual capacitance value between electrode blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the connection channel between adjacent touch electrode blocks is narrowed to increase the mutual capacitance value, then the touch sensitivity is improved, but the connectivity and resistance of the connection channel deteriorate
Solution Approach 1:
The patent applies local quality by creating different protrusion structures at different locations of the touch electrode blocks. Corner protrusions are designed with different dimensions than side protrusions, and adjacent-type side protrusions have reduced areas compared to other side protrusions. This localized differentiation allows the connection channels to maintain adequate width for reliable connectivity while other regions preserve larger electrode areas for high mutual capacitance values, thus resolving the contradiction between touch sensitivity and connectivity.
2Reliability
If the protrusion structures are optimized to increase connection channel width, then the manufacturing complexity increases, but the touch performance improves
Solution Approach 1:
The patent segments the protrusion structures into distinct types: corner protrusions and side protrusions, with side protrusions further divided into adjacent-type and non-adjacent-type. Each segment serves a specific function - corner protrusions maintain structural integrity while adjacent-type side protrusions are optimized for connection channel width. This segmentation allows for systematic manufacturing processes where each type can be formed with specific dimensional parameters, making the complex structure manageable and manufacturable.
Data Source
AI summary
A touch panel includes: a first touch electrode including a first corner protrusion and first side protrusions including an adjacent-type first side protrusion, and a second touch electrode including a second corner protrusion and second side protrusions including an adjacent-type second side protrusion. The first side protrusion includes a second side sub-protrusion. The first corner protrusion includes a second corner sub-protrusion. The second side protrusion includes a fourth side sub-protrusion. The second corner protrusion includes a fourth corner sub-protrusion. The area of at least one of the second corner sub-protrusion and the second side sub-protrusion of the adjacent-type first side protrusion is smaller than that of the other second side sub-protrusion; and/or the area of at least one of the fourth corner sub-protrusion and the fourth side sub-protrusion of the adjacent-type second side protrusion is smaller than that of the other fourth side sub-protrusion.