Optical Wireless Device Dual-Mode Light Receiver
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Solution Overview
Problem
Conventional optical wireless communication devices face a contradiction between increasing communication speed and distance and reducing power consumption, as methods to lower power consumption do not effectively achieve both higher speed and extended range.
Innovation Solution
An optical wireless communication device with a control unit that monitors the received light output, switching between communication mode and charge mode, where the light-receiving element's output is used as charge power when no signal is detected, allowing supplemental operating power and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If communication speed and communication distance are increased, then power consumption increases
Solution Approach 1:
The light-receiving element is designed to perform dual functions: receiving optical communication signals and generating charge power from ambient light. This multi-functionality allows the device to reduce power consumption by utilizing ambient light energy, while maintaining the capability for high-speed communication when needed, thus resolving the contradiction between communication performance and power consumption.
Solution Approach 2:
The control unit dynamically changes the operational state of the light-receiving element based on detected conditions. When ambient light is detected, the element operates in charge generation mode; when optical communication signals are detected, it switches to signal reception mode. This dynamic parameter change allows the system to optimize power consumption while maintaining communication capability.
2Length of stationary object
If communication speed and communication distance are increased, then power consumption increases
Solution Approach 1:
The light-receiving element serves both as a communication receiver and a power generation device. By continuously generating charge power from ambient light, the device can sustain extended communication operations without requiring additional power input, thereby achieving long communication distance while maintaining low power consumption.
Solution Approach 2:
The light-receiving element continuously generates charge power from ambient light throughout the communication process. This continuous power supply enables sustained communication operations over extended distances without interruption or increased power consumption, as the ambient light energy is continuously harvested and utilized.
3Use of energy by moving object
If shutdown mode is executed to reduce power consumption, then communication capability is reduced
Solution Approach 1:
The light-receiving element performs dual functions: receiving optical communication signals and generating charge power. This eliminates the need to shut down the device to save power, as the ambient light continuously generates charge power that sustains communication operations. The device maintains full communication capability while reducing power consumption through efficient energy utilization.
Solution Approach 2:
The device generates its own operating power through the light-receiving element harvesting ambient light energy. This self-powering capability eliminates the need for external power sources or shutdown modes, allowing the device to maintain continuous communication operation while reducing overall power consumption through efficient self-sustained energy utilization.
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 enables both increased communication speed and distance while significantly reducing power consumption, potentially operating the device with zero external power when sufficient charge power is available, improving efficiency and convenience.
Implementation Method 1
a light-receiving element for receiving an optical communication signal
Data Source
AI summary
An optical wireless communication device mounted in electronic equipment includes: a light-receiving element for receiving an optical communication signal; and a control unit that monitors a received light output of the light-receiving element. When the control unit determines that the received light output represents the optical communication signal, it selects and executes communication mode for the optical communication signal. When the control unit determines that the received light output does not represent the optical communication signal, it selects and executes charge mode in which the received light output is used as a charge power.