Thin Biometric Detection Module Without Optical Mechanisms
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Solution Overview
Problem
Conventional biometric detection modules for portable electronic devices are too large and require additional optical mechanisms, making them unsuitable for compact devices and limiting their functionality.
Innovation Solution
A thin biometric detection module with a semiconductor optical detection region, a substrate, and at least one light source, where the light source and detection region are electrically coupled to the substrate and controlled by a control module, allowing for biometric information acquisition without additional optical mechanisms, and featuring a thin, abrasion-proof surface layer for direct contact with the body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional optical mechanisms are placed above the semiconductor optical detection region to form optical imaging, then the imaging quality is improved, but the module size increases and becomes unsuitable for portable electronic devices
Solution Approach 1:
The patent removes the additional optical mechanisms (lenses, mirrors, etc.) from the detection module structure. The semiconductor optical detection region directly detects scattered light from body tissue without requiring external optical components to form images, thereby reducing module size while maintaining biometric detection capability
Solution Approach 2:
The patent replaces the mechanical/optical imaging system with a direct optical detection approach. Instead of using optical mechanisms to form images that are then detected, the semiconductor detection region directly senses the scattered light patterns from body tissue, eliminating the need for complex optical-mechanical imaging systems
2Length of moving object
If the semiconductor optical detection region is made very thin to reduce module thickness, then the portability is improved, but the detection capability may be compromised
Solution Approach 1:
The patent changes the detection parameters by detecting scattered light patterns at the surface level rather than requiring deep tissue penetration or complex optical paths. The thin detection region is optimized to capture sufficient scattered light information from body tissue, maintaining detection reliability while achieving minimal thickness for portability
3Device complexity
If the detection module is designed without additional optical mechanisms to reduce complexity, then the device simplicity is improved, but the biometric information acquisition capability may be insufficient
Solution Approach 1:
The semiconductor optical detection region serves multiple functions itself: it detects scattered light patterns, captures biometric information, and processes signals without requiring separate optical components. The detection region is designed to directly interact with scattered light from body tissue, extracting biometric information through the light scattering patterns inherent in the tissue structure
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 efficient acquisition of biometric information with a thin, compact design suitable for portable devices, allowing for accurate detection of biometric characteristics without the need for additional optical mechanisms, and supports high-frame-rate image capture for continuous feature recognition.
Implementation Method 1
light emitted by the light source may enter the human body and the light passing through the human body then scatters out from the human body surface
Data Source
AI summary
There is provided a thin biometric detection module, which is advantageous in being able to detect scattered light from body tissue after the light transmitting in the body tissue without additional optical mechanism placed on the semiconductor optical detection pixel of the detection module for biometric detection.