Touch Substrate Interlaced Electrode Patterns Sensing Path
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Solution Overview
Problem
Conventional touch substrates have limited sensing sensitivity due to the diamond-shaped driving and sensing electrodes, which restrict their sensing paths and ranges.
Innovation Solution
The touch substrate features interlacing first and second touch patterns with specific shapes and arrangements, including main, branch, and protruding portions, along with insulating layers and bridge portions, to extend the sensing path and range, enhancing sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If diamond-shaped driving electrodes and sensing electrodes are used, then the electrode structure is simple and easy to manufacture, but the sensing path and range are limited, resulting in reduced sensing sensitivity
Solution Approach 1:
The touch pattern is divided into multiple functional segments including main portions, branch portions, and protruding portions. The main portions extend along one direction to form the primary sensing path, while branch portions extend along another direction to create additional sensing paths. This segmentation allows the electrode to cover a larger area and detect touches at multiple locations simultaneously, thereby improving sensing sensitivity without significantly complicating the manufacturing process.
Solution Approach 2:
The electrode structure transitions from a simple two-dimensional diamond shape to a multi-dimensional configuration with main portions, branch portions, and protruding portions extending in different directions. This dimensional expansion creates multiple sensing paths that intersect and overlap, increasing the effective sensing area and improving the ability to detect touch locations with higher precision.
2Measurement precision
If the electrode shape is changed to extend sensing path and range, then sensing sensitivity is improved, but the device complexity increases
Solution Approach 1:
Multiple electrode components (main portions, branch portions, and protruding portions) are merged into a single integrated touch pattern structure. These components are electrically connected and work together as one unified electrode system, allowing the structure to be manufactured as a single piece rather than assembling multiple separate electrodes. This merging approach improves sensing sensitivity while avoiding the complexity of multi-component assembly.
Solution Approach 2:
The touch pattern structure serves multiple functions simultaneously: the main portions provide primary sensing capability, the branch portions provide additional sensing paths, and the protruding portions enhance local sensing resolution. This multi-functionality is achieved within a single integrated structure, improving overall sensing performance without requiring multiple separate devices or complex assembly processes.
Data Source
AI summary
A plurality of first touch patterns of a touch substrate are disposed separately and disposed on the substrate along a first direction. A plurality of second touch patterns are separated from each other and disposed on the substrate along a second direction and interlace with the first touch patterns. One of the first touch patterns includes a plurality of first main portions extended along the second direction, a plurality of branch portions connected to the first main portions and extended along the first direction, and a plurality of first protruding portions connected to the branch portions and extended along the second direction. The first main portions and the first protruding portions are respectively disposed on two ends of the branch portions. The branch portion includes a middle section and two extending sections, and the minimum width of the middle section is less than that of the extending sections.