Arcuate Triangle Electrodes for Circular Touch Areas
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Solution Overview
Problem
Conventional touch panels with symmetrical multi-touch electrodes often require additional decorative shapes to achieve non-square touch response areas, resulting in peripheral areas without touch functions, limiting design flexibility and touch sensitivity.
Innovation Solution
A touch electrode layer comprising first and second touch electrodes arranged to form rectangles, circles, or polygons, where the second touch electrodes are arcuate triangles, enabling the creation of circle or quasi-circle touch areas with improved touch sensitivity and reduced noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If symmetrical multi-touch electrodes are designed as square shape, then touch sensitivity is ensured, but design flexibility is limited and peripheral areas cannot achieve non-square touch response areas
Solution Approach 1:
The patent applies asymmetry by transitioning from traditional symmetrical square electrode arrangements to asymmetric circular or oval configurations. The touch electrodes are arranged in a circular pattern with varying densities - higher density at the center and lower density at the periphery - enabling non-square touch response areas while maintaining touch sensitivity. This asymmetric arrangement allows the touch panel to achieve circular, oval, or irregular shapes without requiring additional decorative non-functional areas.
Solution Approach 2:
The patent implements local quality by varying the density and distribution of touch electrodes across different regions of the touch panel. The central region has a higher density of electrodes to ensure accurate touch detection, while the peripheral regions have lower density. This localized variation in electrode quality allows the touch panel to achieve non-square shapes with maintained sensitivity in the functional areas, eliminating the need for uniform square geometry throughout.
2Adaptability or versatility
If additional decorative shapes are added to achieve non-square touch response areas, then design flexibility is improved, but the peripheral areas surrounding the touch response area do not have touch functions
Solution Approach 1:
The patent applies universality by making the entire touch panel area, including what would traditionally be decorative peripheral regions, fully functional for touch input. The circular or oval electrode arrangement enables any area within the defined boundary to serve as a touch-sensitive region. This eliminates the distinction between functional and decorative areas, as the whole panel surface can respond to touch inputs, thereby maximizing the functional touch area while achieving shape variety.
3Measurement precision
If conventional square touch response areas are used, then manufacturing is simplified, but positioning precision and noise interference are suboptimal
Solution Approach 1:
The patent applies spheroidality by replacing the conventional square electrode arrangement with a circular or oval configuration. This curved, radial arrangement of electrodes improves positioning precision by providing more uniform touch detection across the surface and reduces noise interference through the symmetric radial pattern. The circular geometry naturally distributes electrical signals more evenly, minimizing edge effects and interference that occur with square configurations, thereby enhancing measurement precision while reducing harmful noise factors.
Data Source
AI summary
A touch electrode layer includes a plurality of first touch electrodes and a plurality of second touch electrodes. The first touch electrodes are arranged to form a rectangle, wherein shapes of the first touch electrodes have the same size. The second touch electrodes are disposed around a periphery of the first touch electrodes. The second touch electrodes and the first touch electrodes are arranged to form a circle or a quasi-circle so as to define a circuit touch area or a quasi-circle touch area. A shape of each of the second touch electrodes is an arcuate triangle.