Curved Interlaced Touch Electrodes for Low Impedance and Visual Uniformity
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Solution Overview
Problem
Capacitive touch devices face issues with visual aesthetics due to the visibility of touch electrodes, which can be mitigated but at the cost of increased impedance when slits are used to obscure them, affecting the touch experience.
Innovation Solution
The design incorporates first and second curved patterns with conductive lines arranged in a specific configuration to reduce impedance while preventing the visibility of the conductive lines, enhancing both touch and visual effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If slits are disposed in touch electrodes to prevent visibility of electrode gaps, then visual effect is improved, but impedance of touch electrodes increases
Solution Approach 1:
The touch electrodes are segmented into multiple curved patterns (first curved patterns and second curved patterns) arranged in an interlaced manner. This segmentation allows the electrodes to maintain visual uniformity while preserving electrical conductivity pathways, thus reducing impedance compared to continuous slit structures.
Solution Approach 2:
The patent uses curved patterns instead of straight lines or simple slits. The first and second curved patterns are arranged to intersect and interlace, creating a more complex geometric structure that maintains visual uniformity while providing multiple conductive pathways, thereby reducing impedance.
2Ease of operation
If touch electrodes are disposed with gaps to electrically separate them, then touch sensing function is achieved, but gaps become visible affecting visual effect
Solution Approach 1:
The patent transitions from a simple linear arrangement of electrodes to a two-dimensional interlaced pattern of curved lines. The first curved patterns extend in one direction while the second curved patterns extend in another direction, creating an interlaced structure that fills the gaps and maintains visual uniformity while preserving the electrical separation needed for touch sensing.
Solution Approach 2:
The first and second curved patterns are arranged asymmetrically with respect to each other, intersecting at different angles and positions. This asymmetric interlaced arrangement creates a more uniform visual appearance compared to symmetric patterns, while maintaining the necessary electrical separation for touch sensing functionality.
Data Source
AI summary
A touch device including a plurality of touch electrodes which are electrically separated is provided. Each touch electrode includes a plurality of first curved patterns and a plurality of conductive lines. The first curved patterns are parallel to each other. A first pitch is between two adjacent first curved patterns. Each conductive line is connected between two adjacent first curved patterns. The conductive lines are arranged in a plurality of second curved patterns. The first curved patterns intersect the second curved patterns. In this way, the touch device can have preferable touch and visual effects.