Vehicle Fingerprint Authentication Gating to Prevent Radio Wave Noise
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Solution Overview
Problem
Fingerprint authentication devices in vehicles may generate radio wave noise when accidentally touched, degrading in-vehicle comfort due to unnecessary fingerprint detection processes during vehicle operation.
Innovation Solution
A fingerprint authentication device with a controller that suppresses fingerprint detection processes when not needed, such as during vehicle travel, by setting conditions based on vehicle speed and other states like brake operation or power supply status, ensuring the fingerprint sensor only detects fingerprints when required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the fingerprint sensor performs fingerprint detection process when a finger is brought into contact, then fingerprint authentication function is improved, but radio wave noise is generated that degrades in-vehicle comfort
Solution Approach 1:
The patent changes the operational parameters of the fingerprint sensor by introducing speed-based and state-based control conditions. The controller monitors vehicle speed and compares it against a predetermined threshold, and also checks various vehicle states (power supply status, brake operation, door status, authentication results). Based on these parameter changes, the controller dynamically controls whether the fingerprint detection process is permitted, thereby reducing unnecessary radio wave noise generation while preserving authentication functionality when needed.
2Ease of operation
If the fingerprint detection process is executed frequently, then authentication availability is improved, but unnecessary noise generation increases during vehicle operation
Solution Approach 1:
The patent implements dynamic control of the fingerprint detection process based on real-time vehicle conditions. The controller continuously monitors vehicle speed and various state parameters, and dynamically adjusts the permission status of fingerprint detection. This dynamic approach ensures authentication remains available when appropriate (low speed, specific states) while preventing noise generation during normal vehicle operation, resolving the contradiction between availability and noise reduction.
3Ease of operation
If the fingerprint sensor is always active, then user convenience is improved, but power consumption and noise increase
Solution Approach 1:
The patent implements periodic or conditional activation of the fingerprint sensor rather than continuous operation. The sensor is activated only when specific conditions are met: vehicle speed is below the predetermined threshold and the current vehicle state indicates authentication may be needed. This periodic action pattern reduces power consumption significantly compared to always-on operation, while maintaining user convenience when the vehicle is stationary or moving slowly.
Data Source
AI summary
A system is mounted on a vehicle and includes a sensor configured to perform a detection process that detects a fingerprint of a finger touching the sensor in order to perform a fingerprint authentication process, and a controller. The controller is configured to: (i) control a power supply of the vehicle to be ON when a predetermined authentication process through a predetermined communication with another device other than the sensor is successful, the predetermined authentication process being different from the fingerprint authentication process, and (ii) suppress the detection process that detects the fingerprint in response to the power supply of the vehicle being ON and the predetermined authentication process being successful.