Linear Drive Energy Recovery Circuit for Constant LED Current
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional LED driving circuits face energy loss due to heat conversion and fail to maintain constant current when one LED in a series connection is damaged, leading to undesirable temperature rise and reduced power efficiency.
Innovation Solution
A linear drive energy recovery system comprising a power source module, a primary working load module, and a secondary working load module, where the secondary module is connected in series to the primary module, utilizing a weighting controller and variable-impedance controllers to modulate voltage and maintain constant current through the primary load, thereby recovering and reusing lost energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a standard AC power source is used to drive LEDs, then the circuit can be simplified, but the LEDs will be damaged due to high voltage exceeding their rating
Solution Approach 1:
The patent divides the LED driving circuit into multiple independent parallel channels, each with its own current limiting resistor and diode. This segmentation allows each LED string to be independently controlled and protected, preventing damage from voltage spikes while maintaining overall circuit functionality even if one channel fails.
2Use of energy by moving object
If multiple LEDs are connected in series to reduce current and improve efficiency, then power consumption is reduced, but the entire circuit fails if any single LED is damaged
Solution Approach 1:
The patent divides the LED array into multiple parallel strings, where each string can operate independently. This allows the system to maintain partial functionality even when some LEDs fail, while still achieving energy efficiency through series connection within each string.
Solution Approach 2:
The patent incorporates protection circuits including diodes and current limiting resistors in each parallel channel before the LEDs are connected. These protective elements are pre-installed to prevent voltage spikes and current surges from damaging the LEDs, ensuring reliability while maintaining energy efficiency.
3Reliability
If diodes and resistors are used to control voltage polarity and limit current, then LED protection is improved, but voltage is lost through heat conversion
Solution Approach 1:
The patent applies protection elements (diodes and current limiting resistors) locally to each individual LED string rather than using a single centralized protection circuit. This localized approach minimizes the total power loss by ensuring that each string operates at its optimal current level, reducing unnecessary heat generation while maintaining comprehensive LED protection.
4Ease of operation
If excess voltage is converted to heat through resistors, then current limiting is achieved, but energy is wasted and temperature rises
Solution Approach 1:
The patent carefully selects and adjusts the resistance values of current limiting resistors to match the specific voltage and current requirements of each LED string. By optimizing these parameters, the circuit achieves effective current control while minimizing power dissipation as heat, thereby reducing energy waste and temperature rise.
Data Source
AI summary
The present invention provides a linear drive energy recovery system, comprising a power source module, a primary working load module, and a secondary working load module, wherein the power source module is connected to the primary working load module, and the secondary working load module is connected in series to the primary working load module such that a voltage provided by the power source module minus a voltage drop caused by the primary working load module is supplied to the secondary working load module as an operating voltage of the secondary working load module.