Doppler Touch Identification Using Dual Transceiving Modules
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Solution Overview
Problem
Current technologies lack effective means for accurately identifying touch actions of human fingers for human-computer interaction, particularly in consumer devices.
Innovation Solution
A touch identification device and method utilizing the Doppler effect, employing two transceiving modules to transmit and receive electromagnetic waves intersecting at a touch point, with a calculation module determining the moving speed and direction of a touch body based on frequency shifts and angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Doppler effect-based touch identification device is implemented, then measurement precision of touch action is improved, but device complexity increases
Solution Approach 1:
The touch identification device is segmented into multiple independent transceiving modules, each responsible for specific detection directions. This segmentation allows the system to achieve precise touch action identification through coordinated operation of simpler modular units, resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
Each transceiving module is designed with multi-functionality, capable of both transmitting detection waves and receiving feedback waves. This universal design reduces the need for separate dedicated components, thereby improving measurement precision while controlling device complexity through resource sharing.
2Measurement precision
If multiple transceiving modules are used to determine touch moving direction, then measurement precision is improved, but loss of information increases
Solution Approach 1:
The transceiving modules are arranged in asymmetric spatial configurations with specific arrival angles, allowing the system to distinguish between signals from different directions. This asymmetric arrangement improves measurement precision of touch moving direction while minimizing signal interference by creating unique spatial signatures for each detection path.
Solution Approach 2:
The system employs feedback mechanisms where received feedback waves are processed to determine touch actions, and this information is used to adjust subsequent detection. The feedback loop enhances measurement precision by continuously refining touch moving direction detection while managing information loss through adaptive signal processing.
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
Enables accurate judgment of touch actions by calculating moving speed and direction, enhancing human-computer interaction capabilities and providing a cost-effective solution for consumer devices.
Implementation Method 1
A touch identification device on the basis of Doppler effect, comprising: a first transceiving module configured to transmit a first detection wave along a first direction and receive a first feedback wave formed from the first detection wave after being reflected by a touch body
Data Source
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AI summary
The present invention discloses a touch identification device on the basis of Doppler effect, a touch identification method on the basis of Doppler effect and a touch screen, wherein the touch identification device comprises: a first transceiving module used for transmitting a first detection wave along a first direction and receiving a first feedback wave formed from the first detection wave after being reflected by a touch body; a second transceiving module used for transmitting a second detection wave along a second direction and receiving a second feedback wave formed from the second detection wave after being reflected by the touch body; and a calculation module used for calculating a moving speed and a moving direction of the touch body at the touch point according to the first detection wave, the first feedback wave, the second detection wave and the second feedback wave. According to the present invention, the moving speed and the moving direction of the touch body at the touch point are resolved by arranging a group of (two) transceiving devices, and on the basis of the formula of Doppler effect, thus realizing an accurate judgement on the touch action of the touch body.