Infrared Sensor Power Management via PWM Duty Cycle Control
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Solution Overview
Problem
Existing electronic devices that use infrared signals for control face challenges in efficiently managing power consumption, particularly when the infrared sensor is constantly powered on, leading to unnecessary energy usage.
Innovation Solution
The electronic device employs a power supply system that uses pulse width modulation (PWM) to control the power voltage supplied to the infrared sensor, switching between a first power voltage with an on-duty ratio of less than 1 and a second power voltage with an on-duty ratio of 1 based on trigger signals received through the infrared sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the infrared sensor is constantly powered on to ensure continuous reception capability, then the reliability of signal reception is improved, but the power consumption increases
Solution Approach 1:
The patent applies periodic action by switching the infrared sensor between active and sleep modes. The sensor operates in active mode during specific periods to receive trigger signals and process infrared commands, then transitions to sleep mode to conserve power. This periodic operation pattern ensures reliable signal reception when needed while significantly reducing power consumption during idle periods.
Solution Approach 2:
The patent implements dynamics by making the sensor's operational state changeable rather than static. The sensor dynamically transitions between different power states (active and sleep modes) based on operational requirements. This dynamic state management allows the system to adapt power consumption levels to actual usage needs, maintaining reliability when signals are present while minimizing energy usage during idle periods.
2Speed
If the infrared sensor operates in active mode continuously, then the response time to incoming signals is improved, but the energy waste increases
Solution Approach 1:
The patent applies preliminary action by implementing a sleep mode that allows the sensor to conserve energy while maintaining the capability to quickly transition to an active state. The system prepares for potential signal reception by maintaining a low-power readiness state, enabling fast wake-up and response when infrared signals are detected, thus avoiding continuous operation while preserving rapid response capability.
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 in the infrared sensor by minimizing continuous power usage during idle periods and efficiently switching to full power only when necessary, thereby optimizing energy efficiency.
Implementation Method 1
the electronic device may include an infrared sensor and perform a corresponding operation after converting and interpreting the received infrared signal to an electric signal
Data Source
AI summary
Disclosed is an electronic device including an infrared sensor, a power supply part which supplies power to the infrared sensor. The electronic device controls the power supply part to supply a first power voltage signal with an on-duty ratio of less than 1 to the infrared sensor, and control, based on a trigger signal being received through the infrared sensor while the infrared sensor is operating based on the first power voltage signal, the power supply part to supply a second power voltage signal with an on-duty ratio of 1 to the infrared sensor.