Dynamic Voltage Regulation for LED Driver Efficiency
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Solution Overview
Problem
Existing LED driving apparatuses face inefficiencies due to the need for a higher output voltage from the voltage conversion module to accommodate varying LED strings, leading to increased current regulator losses and reduced system efficiency.
Innovation Solution
A voltage regulation circuit that includes a voltage conversion module and a control module, which adjusts the output voltage based on current feedback to maintain LED brightness while minimizing current regulator losses, using a comparator and control unit to regulate the voltage dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the output voltage is set to a voltage value slightly higher than the maximum working voltage of the LED string to ensure normal operation, then the reliability of LED operation is improved, but the energy loss of the current regulator increases and system efficiency deteriorates
Solution Approach 1:
The patent applies dynamics by making the output voltage adjustable rather than fixed. The voltage conversion module dynamically changes the output voltage based on the actual working voltage of the LED string, allowing the system to adapt to different LED characteristics while minimizing energy loss in the current regulator.
Solution Approach 2:
The patent implements feedback by detecting the actual working voltage of the LED string and using this information to regulate the output voltage of the voltage conversion module. The control module continuously monitors the LED string voltage and adjusts the output voltage accordingly, ensuring optimal operation while reducing energy loss.
2Adaptability or versatility
If a fixed high output voltage is used to accommodate maximum working voltage variations among different LED strings, then the adaptability of the system is improved, but the energy consumption increases and system efficiency deteriorates
Solution Approach 1:
The system transitions from a fixed voltage approach to a dynamic voltage adjustment approach. The voltage conversion module adapts its output voltage based on the specific LED string connected, allowing the system to work efficiently with different LED configurations while minimizing energy consumption.
Solution Approach 2:
The patent changes the voltage parameter dynamically based on the actual needs of the LED string. Instead of maintaining a constant high voltage, the system adjusts the output voltage parameter to match the working voltage requirements of the connected LED string, reducing energy waste while maintaining adaptability.
Data Source
AI summary
A voltage regulation circuit includes a voltage conversion module, an LED driving module and a control module. The voltage conversion module is operable to receive and convert the first voltage to a second voltage. Each LED driving loop of the LED driving module has a current regulator and an LED string. The control module is operable to output a control signal according to the received input signal which reflects the current flowing through the LED driving module. The voltage conversion module regulates the second voltage according to the control signal, such that the regulated second voltage still keeps the brightness of the LED string of each LED driving loop unchanged.