Touch Electrode Layout for Wider Connection Channels

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Solution Overview

Problem

Existing touch panels face issues of poor connectivity and high resistance due to narrow connection channels between touch electrode blocks, leading to potential touch control failures.

Innovation Solution

The design includes first and second touch electrodes with strategically reduced corner and side protrusions, enhanced by excision portions and corner extension portions, increasing the width of connection channels and improving electrical connectivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If touch electrode blocks are arranged with standard protrusions for connectivity, then electrical connection is maintained, but connection channel width remains narrow causing high resistance

Engineering Contradiction:
Improveelectrical connectivityVSAvoidresistance
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by creating excision portions (removed areas) in specific locations of the touch electrode blocks, particularly in corner regions. This local modification increases the width of connection channels between adjacent electrode blocks at critical interfaces without altering the overall electrode structure, thereby reducing contact resistance locally where connections occur while maintaining the general connectivity pattern.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent introduces corner extension portions that protrude from corner regions of touch electrode blocks into the connection channels between adjacent blocks. This dimensional addition extends the conductive path laterally into the gap between blocks, effectively increasing the connection channel width and providing multiple parallel conduction paths, which reduces overall contact resistance.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Object-affected harmful factors

If corner and side protrusions are reduced to increase connection channel width, then resistance decreases, but electrode block connectivity may be compromised

Engineering Contradiction:
ImproveresistanceVSAvoidconnectivity
Core Design Contradiction:
Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent employs asymmetry by applying different modification strategies to different parts of the electrode blocks. Corner regions receive extension portions that add conductive material, while side regions may have excision portions that remove material to widen channels. This asymmetric treatment allows optimization of connection channels in different locations based on their specific connectivity requirements, maintaining overall electrode block connectivity while reducing resistance at critical interfaces.

Inventive Principle:
Principle #4Asymmetry

Solution Approach 2:

The patent segments the touch electrode blocks into distinct regions with different geometric characteristics - corner regions with extension portions and side regions with excision portions. This segmentation allows each region to be optimized independently for its specific function: corner regions focus on providing robust connection paths through extensions, while side regions focus on widening connection channels through excisions, collectively maintaining connectivity while reducing resistance.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS20250377755A1Touch panel and display device
Publication Date: 2025.12.11 CHENGDU BOE OPTOELECTRONICS TECH CO LTD
  • US20250377755A1 patent drawing
  • US20250377755A1 patent drawing
  • US20250377755A1 patent drawing

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.