Electronic Switch Sensing Circuit for Multi-Stage Pressure Input
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Solution Overview
Problem
Mechanical switches face issues with low life expectancy and reliability when implementing multi-stage pressure sensing due to complex structures, while touch switches struggle to accurately simulate pressure sensing functions across different users due to varying finger sizes.
Innovation Solution
An electronic switch system with a sensing module combining pressure and touch sensing modules, coupled with a comparator circuit, to provide both pressure and touch sensing signals, enabling multi-stage pressure sensing and avoiding mechanical losses and user variability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical switches are used to implement multi-stage pressure sensing, then pressure sensing function is achieved, but life expectancy and reliability deteriorate due to mechanical wear
Solution Approach 1:
The patent replaces the mechanical switch structure with an electronic sensing system comprising a pressure sensing module, touch sensing module, and comparator circuit. This substitution eliminates mechanical friction and wear, thereby extending service life and improving reliability while maintaining the multi-stage pressure sensing function through electronic comparison of sensing signals against reference values.
Solution Approach 2:
The electronic switch device integrates both pressure sensing and touch sensing functions into a single device. The pressure sensing module detects pressure magnitude for multi-stage sensing, while the touch sensing module detects touch events, allowing the device to serve multiple functions without requiring separate mechanical components for each function.
2Device complexity
If touch switches are used to simulate pressure sensing, then structure is simplified, but measurement precision deteriorates due to user variability
Solution Approach 1:
The patent introduces a comparator circuit as an intermediary between the sensing modules and the output stage. The comparator circuit receives both the pressure sensing signal and touch sensing signal, compares them against reference values, and generates accurate multi-stage pressure sensing outputs. This intermediary ensures precise measurement by electronically comparing signals rather than relying on direct mechanical thresholds that vary with user characteristics.
Data Source
AI summary
An electronic switch device and an electronic switch system are provided, wherein the electronic switch system includes: an electronic switch device, which includes: a sensing module, which includes: a pressure sensing module for providing a pressure sensing signal; and a touch control sensing module disposed on the pressure sensing module for providing a touch control sensing signal; and a comparator circuit coupled to the sensing module for receiving the pressure sensing signal.