Touch Panel Redundant Lines for Uniform Response
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Solution Overview
Problem
Current touch panels with self-capacitive technology experience varying touch responses and accuracy due to different line densities, leading to non-uniform touch effects and reduced quality, especially in fine application scenarios like stylus use.
Innovation Solution
A touch panel design featuring a touch layer with touch blocks and signal units arranged in a specific configuration, including redundant touch lines that are insulated from the touch units, ensuring uniform distribution and connection between touch units, signal units, and redundant touch lines to enhance touch accuracy and response uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If single and double hybrid wiring method is adopted with continuous single and double touch signal lines, then wiring coverage is improved, but touch response uniformity deteriorates due to different line densities in different areas
Solution Approach 1:
The continuous touch signal lines are segmented into discrete segments that can be independently configured. Each segment connects to touch blocks in a controlled manner, allowing the line density to be regulated within each segment while maintaining overall wiring coverage across the touch panel surface.
Solution Approach 2:
Different regions of the touch panel are assigned different wiring configurations tailored to their specific requirements. By locally optimizing the signal line arrangement in different areas, the patent achieves uniform touch response characteristics across the entire surface while maintaining adequate wiring coverage in each region.
2Reliability
If different layers of metal are used for touch blocks and touch signal lines, then electrical connection is improved, but parasitic capacitance increases affecting touch accuracy
Solution Approach 1:
An intermediary structure is introduced between the touch blocks and touch signal lines to mediate their electrical connection. This intermediary layer enables reliable electrical coupling while providing electrical isolation that reduces parasitic capacitance, thereby maintaining touch accuracy.
Solution Approach 2:
The patent employs composite material structures combining different metallic layers with specific electrical properties. By selecting materials with appropriate conductivity and capacitance characteristics, the design achieves reliable electrical connection while minimizing parasitic capacitance effects on touch measurement precision.
Data Source
AI summary
A touch panel and a mobile terminal are disclosed in the embodiment of the present disclosure. The touch panel includes a touch layer, a signal line layer, and a plurality of redundant touch lines extending in a first direction. The touch layer includes a plurality of touch blocks, and one of the touch blocks includes a plurality of touch units. The signal line layer includes a plurality of signal units, and one of the signal units is electrically connected to one of the touch blocks. The redundant touch lines are insulated from the touch units, and one of the redundant touch lines or one of the signal units is disposed between two adjacent ones of the touch units.