Biometric Apparatus Light Source Control for Power Reduction
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Solution Overview
Problem
Existing biometric measurement methods face high power consumption issues due to the continuous operation of light sources, which limits their usage and efficiency.
Innovation Solution
A biological measuring device that includes a light source, an imaging device, and a control circuit, where the light source emits light only when a specific part of the body is within a predetermined coordinate range, reducing unnecessary power consumption by controlling light emission based on image processing and object positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the light source operates continuously to perform biometric measurement, then measurement accuracy is maintained, but power consumption increases
Solution Approach 1:
The light source operates periodically rather than continuously. The control circuit activates the light source only during specific measurement intervals when biometric data needs to be collected, and keeps it inactive during other periods. This periodic operation maintains measurement capability while significantly reducing overall power consumption compared to continuous operation.
Solution Approach 2:
The imaging device captures images to determine whether the target object is within the measurement area, and this information automatically controls the light source operation. The system uses its own imaging capability to regulate its power-consuming component, eliminating the need for external control and enabling autonomous power management.
2Reliability
If the light source emits light continuously, then measurement coverage is maintained, but unnecessary light may enter the human eye
Solution Approach 1:
The control circuit uses feedback from the imaging device to control light source operation. The imaging device continuously monitors whether the target object is within the measurement area, and this feedback information determines when the light source should be activated. This closed-loop control ensures light is emitted only when needed for measurement, preventing unnecessary light exposure to the human eye while maintaining measurement coverage.
Solution Approach 2:
The light source operation transitions from a static continuous state to a dynamic conditional state. The system adapts light emission based on real-time detection of target position and measurement requirements, activating light only when the target is properly positioned and measurement is needed, thereby reducing harmful light exposure while maintaining measurement reliability.
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 low power consumption biometric measurements while ensuring accurate detection of internal body information, reducing power usage and preventing light from entering the human eye during measurement.
Implementation Method 1
an imaging device that detects second light returned from the living body and acquires a first image including at least part of the living body
Implementation Method 2
If, in the first image, a specific part of the living body is not located in a predetermined coordinate range in the first image, the control circuit restricts emission of the first light from the light source
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A biological measuring device according to an aspect of the present disclosure includes a light source that emits first light illuminating an area on a living body, an imaging device that detects second light returned from the living body and acquires a first image including at least part of the living body, and a control circuit that controls the light source. If, in the first image, a specific part of the living body is not located in a predetermined coordinate range in the first image, the control circuit restricts emission of the first light from the light source. The predetermined coordinate range is set outside the area.