LED Warm Dim Circuit via Differential Current Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
LED lighting fixtures face challenges in dimming, experiencing flicker, pixilation, and a lack of warm color temperature adjustment, which traditional PWM techniques fail to address effectively, resulting in lighting abnormalities.
Innovation Solution
A system using differential current regulation circuitry to selectively dim LED segments of varying color temperatures, simulating a warm dimming effect by adjusting current through each segment to control brightness and color temperature, mimicking incandescent lighting characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If PWM techniques are used to dim LED strings, then light output is regulated, but lighting abnormalities occur including flicker, pixilation, and lack of color temperature change
Solution Approach 1:
The LED string is divided into multiple segments with different color temperatures (e.g., warm white, cool white, daylight). Each segment can be independently controlled to simulate the warm dimming effect where color temperature changes as brightness decreases, eliminating the lighting abnormalities associated with traditional PWM dimming.
Solution Approach 2:
The patent changes the operational parameters of different LED segments independently. By adjusting the current through each segment differently, the system achieves both brightness regulation and color temperature variation, resolving the issue where traditional single-parameter PWM control causes lighting abnormalities.
2Illumination intensity
If traditional incandescent lighting is dimmed, then warm color temperature effect is achieved, but energy efficiency is reduced
Solution Approach 1:
Different segments of the LED string are assigned different color temperatures to replicate the warm dimming effect of incandescent lighting. By selectively activating and dimming these segments, the system achieves the desirable color temperature variation without the energy inefficiency of traditional incandescent bulbs.
Solution Approach 2:
The patent uses a composite approach by combining multiple LED types with different color temperatures in a single string. This composite LED assembly simulates the characteristics of incandescent lighting while maintaining LED energy efficiency, as each LED type operates in its optimal efficiency range.
3Use of energy by moving object
If LED fixtures are constructed with multiple individual LEDs, then efficiency is improved, but dimming control becomes more difficult
Solution Approach 1:
The multiple individual LEDs are organized into controllable segments, making dimming control manageable. Each segment can be controlled independently or in groups, simplifying the dimming operation while maintaining the energy efficiency benefits of using multiple individual LEDs rather than a single bulb.
Solution Approach 2:
The control system is designed to handle multiple LED segments universally, providing a single interface for dimming control that manages all segments automatically. This multi-functional approach simplifies operation while maintaining energy efficiency through precise control of each LED segment.
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 solution provides a warm dimming effect in LED lighting, improving lighting quality by independently adjusting light output and color temperature, enhancing the dimming experience while maintaining LED efficiency.
Implementation Method 1
LED lighting fixtures are increasingly popular alternatives to traditional incandescent and compact florescent lighting
Data Source
AI summary
A system for and method of regulating the current through a string of LEDs using differential current regulating circuits such that certain segments of the string produce more light output than other segments to regulate the color temperature of the total light output by the string such that a warm dim function may be enabled.