Biometric Sensor Voltage Switching for Lower-Power Operating Modes
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Solution Overview
Problem
Conventional electronic devices unnecessarily consume power in operation modes that require less power due to the use of a uniform application voltage for optical sensors, regardless of the specific operation mode.
Innovation Solution
The electronic device adjusts the application voltage for optical sensors based on the set operation mode, using a processor to identify the appropriate voltage for each mode, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a uniform application voltage is used for optical sensors in all operation modes, then the device can operate in any mode without voltage adjustment, but power is unnecessarily consumed in modes that require less power
Solution Approach 1:
The patent implements dynamic voltage adjustment by setting different application voltages for light emitting elements based on the current operation mode. The processor dynamically selects and applies appropriate voltages from a plurality of operation modes, allowing the system to adapt its power consumption to the actual operational requirements rather than maintaining a fixed high voltage state.
Solution Approach 2:
The patent changes the electrical parameter (application voltage) of the light emitting elements according to different operation modes. By storing multiple operation modes with different voltage settings and selecting the appropriate mode based on current operational needs, the system optimizes power consumption while maintaining functionality across different operating conditions.
2Device complexity
If the same application voltage is used for all operation modes, then voltage selection is simple, but power consumption increases in modes that could operate with lower voltage
Solution Approach 1:
The system transitions from static voltage control to dynamic voltage control by implementing multiple operation modes with different voltage settings. The processor dynamically determines the appropriate operation mode based on current operational requirements and applies the corresponding voltage, thereby reducing energy loss in modes that require lower power while maintaining simple voltage selection through predefined mode categories.
3Measurement precision
If high voltage is applied to light emitting elements in all modes, then measurement accuracy is maintained across all operation modes, but power consumption is unnecessarily high in low-power modes
Solution Approach 1:
The patent applies different voltage levels to light emitting elements based on specific operation modes rather than using a uniform high voltage across all modes. This localized quality adjustment ensures that high voltage (and thus high measurement precision) is applied only when necessary for accurate biometric measurement, while lower voltages are used in operation modes where reduced power consumption is prioritized.
Solution Approach 2:
The system changes the application voltage parameter according to operational requirements by selecting from multiple predefined operation modes. This allows the measurement precision to be optimized for specific modes while reducing power consumption in other modes, achieving a balance between accuracy and energy efficiency through parameter variation.
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 reduces power consumption by applying voltages less than the reference voltage, optimizing power usage based on the specific operation requirements of the optical sensors.
Implementation Method 1
a sensor module including a plurality of light emitting elements and at least one optical sensor
Implementation Method 2
at least one optical sensor... obtain biometric information based on light irradiated from each of the plurality of light emitting elements
Data Source
AI summary
An electronic device for measuring a biometric signal and an operating method of the electronic device is provided. The electronic device may set a plurality of operating modes for a sensor module and may set operating information for each of the plurality of operating modes, identify an operating mode to be used on the basis of a designated event occurrence, identify a voltage of the sensor module to be applied to a plurality of light-emitting devices on the basis of the operating information set in the identified operating mode. The electronic device may further output the identified voltage, where the identified voltage is less than reference voltage, and obtain biometric information on the basis of light irradiated from each of the plurality of light-emitting devices according to the identified voltage.