Capacitive Coupling Circuit for Optical Diode Impedance Matching
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Solution Overview
Problem
Conventional methods for coupling driving signals to light energy emitting diodes, such as optical and laser diodes, result in significant power losses due to impedance mismatches, leading to inefficient power transmission.
Innovation Solution
The use of parallel coils or plates with non-conductive, non-magnetic cores for capacitive coupling, combined with variable capacitors and switching mechanisms, to match the impedance of light energy emitting diodes, reducing power dissipation and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional matching elements or coupling schemes are used to drive light energy emitting diodes, then the diode can be driven, but significant power losses occur due to impedance mismatches
Solution Approach 1:
The patent introduces a capacitive coupling element as an intermediary between the driver circuit and the light energy emitting diode. This capacitor serves as a mediator that transfers energy from the driver to the diode while managing impedance mismatches, thereby reducing power loss without requiring complex matching networks
Solution Approach 2:
The patent utilizes the capacitive reactance parameter, which varies with frequency, to optimize power transfer. By selecting an appropriate capacitance value that changes with operating frequency, the system achieves better impedance matching across different frequencies, reducing power loss dynamically
2Use of energy by moving object
If conventional coupling methods are used, then signal transmission is achieved, but power efficiency decreases due to large power losses
Solution Approach 1:
The capacitive coupling element acts as an energy-efficient intermediary that minimizes power loss during transmission. The capacitor stores and releases energy in a manner that optimizes power transfer to the diode, improving overall power efficiency compared to conventional direct coupling or complex matching elements
Solution Approach 2:
The capacitive coupling exploits periodic charging and discharging of the capacitor at the operating frequency to efficiently transfer energy. This periodic energy storage and release mechanism optimizes power delivery to the diode, reducing wasted power and improving efficiency
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 proposed solution significantly reduces power loss and heat dissipation by effectively matching the impedance of light energy emitting diodes, enhancing power transmission efficiency across various frequency ranges.
Implementation Method 1
capacitive coupling for optical or laser diodes
Implementation Method 2
perform impedance matching for driving a light energy emitting diode
Data Source
AI summary
Aspects of the present disclosure may address the problem of coupling a radio-frequency (RF) input signal to a light-frequency emitting diode, where the output impedance of the device providing the input signal and the diode input impedance differ. A coupler according to aspects of the present disclosure may be a capacitive coupler that may take the form of parallel concentric coils, which may be comprised of wire or metal plate coils, or parallel plates, connected in series with a variable capacitive element. According to a further aspect of the present disclosure, parallel concentric coils and parallel plates may be arranged in parallel, and the input signal to the coupler may be switched to one or the other. The switching may be automated, based on frequency content or amplitude of the input signal.