Touch Control Unit Frequency Switching for User Identification
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Solution Overview
Problem
Current touch screen technologies are unable to effectively identify different users based on their touch interactions, as they primarily focus on accurate touch point positioning rather than user identification.
Innovation Solution
The method involves a touch-control unit with N touch-control nodes, which operates under different frequency conditions of working voltages, switching between a fixed frequency and a time-varying frequency to detect and differentiate touch operations, generating physiological characteristic information based on variations in capacitance values under varying frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the touch-control unit uses a fixed frequency working voltage, then the touch point positioning accuracy is maintained, but the user identification capability is lost
Solution Approach 1:
The patent applies dynamics by switching the touch-control unit between two operational states: using fixed frequency working voltage for normal touch detection and positioning, and using time-varying frequency working voltage for user identification. This dynamic adaptation allows the system to optimize performance based on the current operational mode, achieving both precise positioning and user identification capabilities.
2Adaptability or versatility
If the touch-control unit uses time-varying frequency working voltage, then the user identification capability is improved, but the touch point positioning accuracy deteriorates
Solution Approach 1:
The system dynamically adjusts the frequency characteristics of the working voltage based on the detected touch operation type. When user identification is required, time-varying frequency is applied to capture physiological characteristics. When precise positioning is needed, fixed frequency is used to maintain measurement accuracy. This dynamic switching resolves the contradiction between the two functional requirements.
3Measurement precision
If the touch screen is designed for accurate touch point positioning, then the positioning precision is improved, but the user identification function is not achieved
Solution Approach 1:
The patent makes the touch screen universally capable of multiple functions by introducing time-varying frequency working voltage that can detect physiological characteristics such as heartbeat and respiration. The same touch-control unit that provides accurate positioning also gains user identification capability through this frequency modulation, allowing one device to serve multiple purposes without requiring separate systems.
4Adaptability or versatility
If the touch screen is designed for user identification, then the identification capability is improved, but the touch point positioning accuracy deteriorates
Solution Approach 1:
The system employs dynamic frequency adjustment where the working voltage frequency characteristics are adapted based on the current task. For user identification, time-varying frequency captures physiological signals. For positioning, fixed frequency ensures accuracy. This dynamic behavior allows the system to optimize for the current operational requirement, resolving the trade-off between identification and positioning capabilities.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for the identification of users by capturing unique variations in capacitance values when different users interact with the touch screen, enabling effective user identification without significant modifications to existing touch screen systems.
Implementation Method 1
acquiring variations of a first attribute value of a touch-control node within a touch region corresponding to the second touch operation on the touch-control unit under different frequencies of the second working voltage; and generating first physiological characteristic information based on the variations of the first attribute value
Data Source
AI summary
The disclosure provides an information processing method and an electronic device. The method includes: detecting working mode of the touch-control unit; controlling the touch-control unit to work under frequency condition of a first working voltage if it is in a first working mode, and controlling the touch-control unit to work under frequency condition of a second working voltage if it is in a second working mode. Frequency of the first working voltage is a fixed and frequency of the second working voltage is time-varying. A corresponding electronic device is also disclosed.