Biometric Authentication Device with Inverted Light Source and Imaging Unit
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Solution Overview
Problem
Vein authentication technologies face challenges in achieving accurate and efficient user authentication in high-traffic environments, where users with varying proficiency levels may present their hands incorrectly, leading to authentication errors.
Innovation Solution
A biometric authentication device with a light source unit and imaging unit configuration, where the optical axis of the light source intersects with the housing's longitudinal direction at an angle of less than 90 degrees, allowing for clear imaging of vein patterns without requiring precise user positioning, and a marker guides the user for accurate posture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a slit-like interface is used for vein authentication, then authentication accuracy is improved, but user convenience deteriorates
Solution Approach 1:
The patent inverts the conventional slit-like interface design by using a surface-type interface where the light source and imaging unit are positioned on opposite surfaces of the device. The light source is placed on the lower surface while the imaging unit is on the upper surface, allowing users to simply place their hand on the upper surface without inserting it into a slit. This inversion maintains authentication accuracy while dramatically improving user convenience.
2Measurement precision
If users are required to maintain precise positioning and posture, then authentication accuracy is improved, but operation complexity increases
Solution Approach 1:
The patent transitions from a conventional single-surface design to a three-dimensional configuration where the light source and imaging unit are positioned on opposite surfaces of the device. This spatial separation in the vertical dimension creates a through-type illumination path that is tolerant of variations in hand positioning and posture on the upper surface, eliminating the need for users to maintain precise positioning while preserving authentication accuracy.
3Productivity
If authentication is performed in high-traffic environments with short time intervals, then processing speed is improved, but image quality deteriorates
Solution Approach 1:
The patent incorporates a marker on the upper surface that guides users to the correct placement position before authentication begins. This preliminary guidance ensures that even in high-traffic environments with short time intervals, users consistently position their hands correctly, maintaining image quality while enabling rapid processing. The marker preparation occurs in advance and requires no active user effort during the authentication process.
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
The solution enables accurate biometric authentication while reducing user burden, allowing for quick and efficient authentication in high-traffic settings by ensuring consistent imaging of vein patterns regardless of user proficiency.
Implementation Method 1
a light source unit that is installed on an upper surface of the housing and includes a light source; an opening that is provided in the upper surface of the housing and located below the light source
Data Source
AI summary
A biometric authentication device including a housing, a light source unit that is installed on an upper surface of the housing and includes a light source, and an opening that is provided in the upper surface of the housing and located below the light source, and an imaging unit that is disposed inside the housing is disclosed. In the device, an optical axis of the light source intersects with a longitudinal direction of the housing, and the imaging unit images a user's biometric feature irradiated with an irradiation light from the light source through the opening.