Dual Light Receiver Layout for Optical Power and Data Transfer
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Solution Overview
Problem
Existing optical power feeding systems are unable to simultaneously transmit electric power and information via feed light.
Innovation Solution
A powered device comprising a first light receiver to convert feed light into electric power, a second light receiver to convert reflected feed light into an electrical signal, and a demodulator to extract information superimposed on the feed light by modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If feed light is used for power transmission only, then power transmission efficiency is improved, but information transmission capability deteriorates
Solution Approach 1:
The patent segments the feed light into two functional components: one for power transmission and one for information transmission. By using multiple light receivers with different characteristics, the system separates the power extraction function from the information detection function, allowing both to operate simultaneously without interfering with each other's performance
Solution Approach 2:
The feed light is designed to serve multiple functions simultaneously: it acts as both a power carrier and an information carrier. The optical power feeding system achieves multi-functionality by enabling the same light source to provide both electrical power and data transmission capabilities through appropriate signal modulation and reception techniques
2Loss of information
If information is superimposed on feed light by modulation, then information transmission is enabled, but power conversion efficiency deteriorates
Solution Approach 1:
The patent applies local quality by using light receivers with different spectral response characteristics or conversion efficiencies for different portions of the modulated light signal. This allows the system to optimize power extraction from certain light components while simultaneously extracting information from other components, minimizing the trade-off between power efficiency and information transmission
3Device complexity
If a single light receiver is used, then device complexity is reduced, but simultaneous power and information reception deteriorates
Solution Approach 1:
The patent segments the light reception function into multiple specialized receivers: one optimized for power conversion and another for information detection. This segmentation allows each receiver to be optimized for its specific function, enabling simultaneous power and information reception while maintaining manageable system complexity through clear functional separation
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
Enables simultaneous transmission of electric power and information via feed light, enhancing the efficiency and versatility of optical power feeding systems.
Implementation Method 1
a first light receiver configured to convert feed light incident thereon into electric power
Implementation Method 2
a second light receiver configured to convert the feed light reflected by a light receiving surface of the first light receiver into an electrical signal
Data Source
Figure 1
Figure 2~3A
Figure 3B~3D
AI summary
A powered device includes a first light receiver, a second light receiver, and a demodulator. The first light receiver converts feed light incident thereon into electric power. The second light receiver converts the feed light into an electrical signal. The demodulator demodulates the electrical signal converted by the second light receiver, and acquires information. The information is superimposed on the feed light in advance by modulation.