LED Power Supply Circuit Using Driving Current Recycling

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Solution Overview

Problem

Existing lighting apparatuses face inefficiencies in power supply for LEDs and peripheral components, leading to increased power consumption, heat generation, and limited miniaturization due to the use of AC/DC converters and linear regulators, which degrade the performance and functionality of lighting systems.

Innovation Solution

A power supply circuit that includes a regulator circuit to generate a positive supply voltage from a portion of the LED driving current and a converter circuit to control the LED driving current, allowing for efficient power distribution and reduced heat generation, while also enabling miniaturization and various active operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If AC/DC converters and linear regulators are used to supply power to LEDs and peripheral components, then the lighting apparatus can operate with AC voltage input, but power consumption increases and heat generation occurs

Engineering Contradiction:

Improvepower consumptionVSAvoidenergy loss

Core Design Contradiction:

Use of energy by moving objectVSLoss of energy

Solution Approach 1:

The patent merges the power supply functions for LEDs and peripheral components into a single integrated circuit. The regulator circuit generates a first positive supply voltage from LED driving current, and a second regulator circuit generates a second positive supply voltage from the first positive supply voltage. This integration eliminates the need for separate AC/DC converters and linear regulators, reducing overall power consumption and energy loss.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The regulator circuit uses the LED driving current itself as the input power source for generating supply voltages for peripheral components. Instead of drawing additional power from the AC input through inefficient conversion stages, the system recycles the LED driving current to power control circuits, dimming circuits, and other peripherals, thereby reducing total power consumption.

Inventive Principle:

Principle #25Self-service

2Reliability

If AC/DC converters and linear regulators are used for power supply, then the lighting apparatus can function with AC input, but heat generation increases

Engineering Contradiction:

Improveoperational functionalityVSAvoidheat generation

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The patent replaces traditional AC/DC converters and linear regulators with a regulator circuit that generates supply voltages directly from LED driving current. This substitution eliminates the inefficient power conversion stages that generate excessive heat, while maintaining reliable operation of the lighting apparatus with AC input.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If traditional power supply circuits are used, then the lighting apparatus can operate, but miniaturization is limited due to component size

Engineering Contradiction:

Improveoperational capabilityVSAvoiddevice size

Core Design Contradiction:

ProductivityVSVolume of moving object

Solution Approach 1:

The patent combines multiple power supply functions into a single integrated regulator circuit that can generate both the first positive supply voltage for LEDs and the second positive supply voltage for peripheral components. This integration dramatically reduces the overall circuit footprint, enabling miniaturization of the lighting apparatus while maintaining full operational capability.

Inventive Principle:

Principle #5Merging (Combining)

4Adaptability or versatility

If separate power supplies are used for LEDs and peripheral components, then each component can be optimized, but device complexity increases

Engineering Contradiction:

Improvecomponent optimizationVSAvoidcircuit complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The regulator circuit is designed to perform multiple functions: generating the first positive supply voltage for LED driving, generating the second positive supply voltage for peripheral components, and providing efficient power distribution throughout the system. This multi-functional approach allows each component to be optimized for its specific function while the overall circuit complexity is reduced through integration.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 consumption, heat generation, and cost, while improving power efficiency and enabling the miniaturization of lighting apparatuses, facilitating the implementation of lighting systems with various active operations.

Implementation Method 1

a regulator circuit to generate a positive supply voltage from a portion of the LED driving current

Methodology Applied

Scientific EffectElectrical energy conversion: Electromagnetic Induction

Data Source

PatentEP3700303B1Circuit for supplying power to components of lighting apparatus, and lighting apparatus including same

Publication Date: 2023.07.05 WELLANG CO LTD

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AI summary

Provided is an apparatus including a regulator circuit configured to generate at least one positive supply voltage from at least a portion of a light-emitting diode (LED) driving current passed through an LED to supply power to a component included in a lighting apparatus; and a converter circuit configured to receive a first control signal from the component and output a second control signal for controlling the LED driving current by converting the first control signal.