Touch Screen Marginal Zone Ancillary Electrodes
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Solution Overview
Problem
Conventional touch screens experience reduced touch control accuracy and increased error rates at the edge zones due to the small touch area, leading to poor user experience.
Innovation Solution
Incorporating additional ancillary electrodes in the marginal zones of the touch screen, specifically in the areas from the edge of the touch zone to the outer frame, to expand the effective touch area and enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the touch screen uses a conventional design without ancillary electrodes, then the device complexity is low, but the touch control accuracy at the edge zones is reduced
Solution Approach 1:
The touch screen is segmented into a central touch zone and marginal zones, with ancillary electrodes specifically placed in the marginal zones. This segmentation allows the edge areas to be treated differently from the center, enabling improved touch accuracy at edges without complicating the entire screen structure.
Solution Approach 2:
Ancillary electrodes are added only in the marginal zones where touch accuracy problems occur, rather than uniformly across the entire screen. This local enhancement improves edge touch control accuracy while maintaining simplicity in the central area and minimizing overall structural complexity.
2Measurement precision
If the touch area at the edge zone is increased, then the touch control accuracy is improved, but the device structure becomes more complex
Solution Approach 1:
The ancillary electrodes serve multiple functions: they extend the effective touch area in marginal zones, improve touch control accuracy at edges, and maintain compatibility with the existing touch screen structure. This multi-functionality achieves accuracy improvement without proportionally increasing structural complexity.
3Measurement precision
If ancillary electrodes are added in the marginal zones, then the touch accuracy at edge zones is improved, but the device complexity increases
Solution Approach 1:
Instead of adding electrodes across the entire screen, the invention applies electrodes only partially in the marginal zones where accuracy problems exist. This partial action provides sufficient improvement in touch accuracy without the excessive complexity that would result from full-screen electrode addition.
Data Source
AI summary
Disclosed are a touch screen and a terminal device. The touch screen includes a first ancillary electrode and a second ancillary electrode. The first ancillary electrode is arranged in a first marginal zone of the touch screen. The second ancillary electrode is arranged in second marginal zone that is opposite to the first marginal zone. The touch screen includes additional ancillary electrodes to increase the touch accuracy at an edge of the touch screen so as to enhance the performance of the touch screen, allowing for easy touch operation conducted by a user.