Acoustic Power Switch Control for Low-Standby Electronic Displays
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Solution Overview
Problem
Existing control devices for power switches in electronic devices, such as electronic tags, suffer from high standby power consumption due to the use of wireless network or Bluetooth devices, leading to energy waste.
Innovation Solution
A control device for a power switch that incorporates an acoustic sensor and a switch, where the acoustic sensor generates a switch control signal based on the frequency of an acoustic signal in standby mode, periodically turning the switch on or off to control power supply to an external electronic device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If wireless network device or Bluetooth device is used for control, then control functionality is achieved, but standby power consumption is high
Solution Approach 1:
The patent replaces wireless communication devices (Bluetooth/Wi-Fi) with an acoustic sensor-based control system. The acoustic sensor detects sound waves mechanically and converts them to electrical signals, eliminating the need for complex wireless communication hardware in standby mode while maintaining control functionality through acoustic signaling.
Solution Approach 2:
The patent extracts the essential control function from complex wireless communication systems and implements it through a simpler acoustic sensing mechanism. By taking out only the necessary power switching control functionality and implementing it via acoustic detection, the system achieves control with minimal standby power consumption.
2Loss of energy
If acoustic sensor is used to generate switch control signal, then standby current is reduced, but control reliability may be affected
Solution Approach 1:
The patent implements periodic sampling of acoustic signals at predetermined intervals during standby mode. This periodic action allows the system to detect control commands while consuming minimal power, as the acoustic sensor is activated only at specific intervals rather than continuously, thereby reducing standby current while maintaining reliable control responsiveness.
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 solution effectively reduces standby current consumption by using an acoustic sensor to actively generate switch control signals, replacing the need for wireless network or Bluetooth devices and minimizing energy waste.
Implementation Method 1
The acoustic sensor senses an acoustic signal
Data Source
AI summary
A control device for a power switch, a control method for the power switch, and an electronic display system are provided. The control device includes an acoustic sensor and a switch. The switch is coupled between a power supply and an external electronic device. The acoustic sensor senses an acoustic signal. In a standby mode, the acoustic sensor generates a switch control signal according to a frequency of the acoustic signal. The switch turns on or turns off a path for the external electronic device to receive power according to the switch control signal. In the standby mode, the acoustic sensor periodically and actively performs a generating operation of the switch control signal.