Laser Resonance Optical Charging for Long-Distance Device Power
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Solution Overview
Problem
Current wireless charging technologies, such as magnetic induction and RF electromagnetic waves, face limitations in efficiency and safety for long-distance charging of multiple devices, particularly for consumer electronics and drones, due to distance constraints and potential harm to humans.
Innovation Solution
A wireless optical charging system utilizing IR light and laser resonance technology, which includes a transmitter with a light source unit, diffraction grating, and a receiving unit with a retro-reflector, to convert light energy into electrical energy for charging devices over long distances without electrical power supply and human harm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If magnetic induction method is used for wireless charging, then close contact charging is achieved, but charging distance is limited to within 1 cm
Solution Approach 1:
The patent replaces magnetic field-based wireless charging with optical field-based wireless charging using laser beams. This substitution allows energy transmission through optical resonance rather than magnetic induction, enabling charging distances to extend from 1 cm to several meters while maintaining efficiency through resonant coupling between transmitter and receiver optical systems.
Solution Approach 2:
The patent changes the fundamental parameter of energy transmission from magnetic frequency to optical wavelength. By using laser resonance at specific wavelengths and adjusting optical parameters such as beam divergence and resonance frequency matching, the system achieves both long-distance transmission and high charging efficiency simultaneously.
2Length of stationary object
If magnetic resonance method is used to transmit energy over distance, then charging distance is extended, but efficiency is sharply lowered at 1 m or more
Solution Approach 1:
The patent applies optical resonance principles where the receiver is tuned to resonate at the same frequency as the transmitted laser beam. This resonant coupling creates strong energy transfer even over long distances, preventing the efficiency loss that occurs with magnetic resonance methods beyond 1 meter.
Solution Approach 2:
The patent uses collimated laser beams with controlled divergence to maintain energy concentration over distance. By optimizing beam geometry and using optical elements to control light propagation, the system maintains high energy density at the receiver despite increased transmission distance.
3Length of stationary object
If RF electromagnetic wave method is used for wireless charging, then long-distance charging is achieved, but harmful effects to human body occur
Solution Approach 1:
The patent uses highly directional laser beams that concentrate energy precisely at the receiver location. This localized energy transmission minimizes exposure to surrounding areas, reducing harmful effects to the human body while maintaining effective charging distance. The optical beam can be precisely targeted and does not radiate omnidirectionally like RF waves.
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
The system effectively transmits optical power to multiple receivers over long distances, overcoming distance limitations and ensuring safety by using harmless IR light, thus enabling efficient charging of devices like consumer electronics and drones.
Implementation Method 1
a diffraction grating, a prism, or an arrayed waveguide grating which divides light received from the light source unit into wavelengths in a predetermined range to output the light onto a space
Implementation Method 2
a retro-reflector which is a receiver is randomly located in a two-dimensional optical line, resonance occurs at only a wavelength at which optical paths match
Implementation Method 3
a receiving unit which receives light transmitted from the transmitter and converts an energy for some light among the received light into an electric energy to charge devices
Implementation Method 4
a transmitter which transmits a wireless optical charging source (optical source) beam as light with an energy increased by resonance
Data Source
AI summary
A wireless optical charging system according to the present invention includes a transmitter which transmits a laser beam as light with an energy increased by the resonance; and a receiving unit which receives light transmitted from the transmitter and converts an energy for some light among the received light into an electric energy to charge devices. Accordingly, the laser resonance power transfer technology is used to solve the limitation of the distance and harmfulness to the human body.