Tunable Resonant Circuit for Uniform Wireless LED Brightness
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Solution Overview
Problem
Existing assemblies of electronic semiconductor components for lighting applications face challenges in efficient operation over variable distances from an alternating electromagnetic field, leading to undesired variations in brightness due to differing coupling factors.
Innovation Solution
A tunable resonant circuit is implemented using a varactor component and a receiving element on a printed circuit board, allowing for adjustable capacitance and coupling factor, enabling uniform power draw from an electromagnetic field and efficient operation of optoelectronic semiconductor components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a fixed resonant circuit is used to draw energy from an alternating electromagnetic field, then the circuit can operate at a specific resonant frequency, but the coupling factor varies with distance leading to brightness variations
Solution Approach 1:
The patent implements a tunable resonant circuit where the resonant frequency can be dynamically adjusted using a varactor diode. The control unit modifies the capacitance value in response to distance changes or coupling factor variations, allowing the system to maintain optimal resonance conditions across variable distances from the electromagnetic field source, thereby ensuring uniform brightness
Solution Approach 2:
The system incorporates a feedback mechanism where the control unit monitors the coupling factor or distance between the resonant circuit and the electromagnetic field source. Based on this feedback, the control unit adjusts the varactor diode's capacitance to maintain optimal energy transfer and consistent optoelectronic component brightness despite distance variations
2Reliability
If the resonant frequency is adjusted to maintain optimal coupling, then uniform power draw is achieved, but the circuit complexity increases
Solution Approach 1:
The patent changes the electrical parameter (capacitance) of the resonant circuit dynamically. By adjusting the capacitance value through the varactor diode based on detected distance or coupling conditions, the system maintains optimal resonant frequency and stable operation without requiring mechanically complex tuning mechanisms
Solution Approach 2:
The patent replaces mechanical frequency tuning mechanisms with an electronic control system using a varactor diode. This substitution eliminates mechanically movable parts while achieving the same function of resonant frequency adjustment, thereby reducing mechanical complexity while maintaining operational stability
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 tunable resonant circuit ensures consistent energy supply to optoelectronic semiconductor components across varying distances, maintaining uniform brightness and enabling autonomous operation with an integrated energy storage unit.
Implementation Method 1
An alternating electromagnetic field can induce a voltage in an inductance
Implementation Method 2
A varactor component includes a component part having a voltage-controlled capacitance. By way of example, the capacitance of the varactor component is dependent on a DC voltage present at the varactor component
Implementation Method 3
The optoelectronic semiconductor component is arranged on the carrier and has an active region configured for emitting electromagnetic radiation
Data Source
AI summary
An assembly of electronic semiconductor components includes a carrier, at least one optoelectronic semiconductor component, a varactor component and a receiving element. The optoelectronic semiconductor component, the varactor component and the receiving element are arranged on the carrier. The optoelectronic semiconductor component and the varactor component are formed with the same semiconductor material. The optoelectronic semiconductor component has an active region configured for emitting electromagnetic radiation. The varactor component together with the receiving element forms a tunable resonant circuit. The resonant circuit is configured to draw energy for operating the optoelectronic semiconductor component from an alternating electromagnetic field.