Non-Rectangular Touch Electrode Design for Peripheral Sensing
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Solution Overview
Problem
Conventional touch apparatuses face challenges in providing touch sensing functions in non-rectangular shapes, leading to increased algorithm complexity and excessive connection width due to differing electrode shapes in peripheral areas.
Innovation Solution
A touch apparatus design featuring first and second touch electrodes arranged in a circular or quasi-circular pattern with edge touch electrodes, allowing for non-straight edges and reduced complexity in algorithm processing, while maintaining high positioning accuracy and reducing connection width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch electrodes are disposed in the peripheral area with different shapes to match non-rectangular designs, then touch sensing functions are provided in the peripheral area, but the complexity of the overall algorithm is significantly increased and positioning accuracy deteriorates
Solution Approach 1:
The patent applies homogeneity by making all touch electrodes (both in the rectangular touch response area and the peripheral area) have the same triangular shape. This uniform electrode design allows the use of a single, simplified algorithm for touch detection across the entire touch panel, including the peripheral area, thereby providing touch sensing functions without significantly increasing algorithm complexity
Solution Approach 2:
The triangular touch electrodes are designed to serve multiple functions: they work effectively both in the rectangular touch response area and in the peripheral area, regardless of the overall shape (circular, elliptical, or other non-rectangular designs). This universal electrode design eliminates the need for different electrode shapes in different regions
2Adaptability or versatility
If touch electrodes are disposed in the peripheral area to provide touch sensing functions, then the peripheral area gains touch functionality, but the total number of touch electrodes becomes large and the connection width becomes excessively large
Solution Approach 1:
By using uniform triangular electrodes throughout the touch panel, the patent simplifies the overall structure and reduces the total number of electrodes needed compared to designs that require different electrode types for different areas. This homogeneity also simplifies the connection architecture
Solution Approach 2:
The touch panel is divided into a rectangular touch response area and a peripheral area, with the same type of triangular electrodes used in both regions. This segmentation approach with uniform components allows for modular design and reduced connection complexity
3Shape
If decorative shapes are added outside the rectangular touch response area to achieve different external shapes, then the desired external shape is achieved, but the peripheral area does not have touch sensing functions
Solution Approach 1:
The triangular touch electrodes are designed to be universally applicable across the entire touch panel surface, including both the rectangular touch response area and the peripheral area. This allows the peripheral area to maintain touch sensing functionality even when the overall touch panel has non-rectangular shapes
Solution Approach 2:
The use of identical triangular electrodes throughout the touch panel ensures uniform touch sensing capability across all areas, regardless of the overall shape. This homogeneous design eliminates the need for separate decorative elements and maintains functional consistency
Data Source
AI summary
A touch apparatus includes first touch electrodes and at least one edge touch electrode. Each of the first touch electrodes has first edges and a first side edge. A first acute angle is included by the first edges. The first side edge is connected to the first edges and is disposed opposite to the first acute angle. The at least one edge touch electrode is disposed outside the first touch electrodes. A shape of the at least one edge touch electrode is different from a shape of each of the first touch electrodes, and the at least one edge touch electrode has a non-straight edge.