LED Lighting Module Thermal Zoning and Current Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lighting systems using light emitting diodes (LEDs) face challenges in achieving uniform color tone and heat management, leading to variations in color rendition and efficiency.
Innovation Solution
A lighting apparatus with a circuit board hosting multiple LED light source units of different colors, where the positions of LEDs are arranged based on their heat-generation characteristics, and a control unit adjusts current intensities to compensate for chromaticity differences and temperature variations, ensuring consistent white light output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If light emitting devices emitting light of different colors are disposed close to each other on a circuit board, then the size of the lighting apparatus is reduced, but heat accumulation occurs and color uniformity deteriorates
Solution Approach 1:
The patent applies local quality by creating distinct heat management zones on the circuit board. High heat-generating devices (red and green LEDs) are positioned in a first heat management zone with optimized thermal characteristics, while low heat-generating devices (blue LEDs) are positioned in a second heat management zone. This spatial differentiation of thermal properties allows compact arrangement while preventing heat accumulation and maintaining color uniformity.
2Volume of moving object
If light emitting devices emitting light of different colors are disposed close to each other on a circuit board, then the size of the lighting apparatus is reduced, but color uniformity deteriorates
Solution Approach 1:
The patent applies local quality by creating distinct heat management zones on the circuit board. High heat-generating devices (red and green LEDs) are positioned in a first heat management zone with optimized thermal characteristics, while low heat-generating devices (blue LEDs) are positioned in a second heat management zone. This spatial differentiation of thermal properties allows compact arrangement while preventing heat accumulation and maintaining color uniformity.
3Manufacturing precision
If current intensity is increased to compensate for luminous flux deviation, then color consistency is improved, but energy consumption increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the drive current parameters for different light emitting devices based on their individual luminous flux characteristics. The controller modifies current intensity parameters selectively for red, green, and blue LEDs to compensate for manufacturing variations in luminous flux, achieving consistent color output while optimizing energy consumption through precise parameter control rather than uniform high current.
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
This configuration improves color uniformity, reduces heat-related issues, and enhances the reliability and efficiency of the lighting system by optimizing LED placement and current control.
Implementation Method 1
A light emitting device such as a light emitting diode, a kind of semiconductor device that converts electrical energy into light
Implementation Method 2
a control unit adjusts current intensities to compensate for chromaticity differences and temperature variations, ensuring consistent white light output
Implementation Method 3
the positions of LEDs are arranged based on their heat-generation characteristics
Data Source
AI summary
A lighting apparatus according to an embodiment comprises: a circuit board; and a plurality of light emitting modules having first to third light source units for emitting different colors on the circuit board; a control unit for providing a current control signal for controlling a current of each of the first to third light source units; a driver for controlling currents of the first to third light source units with a current control signal of the control unit, and a memory unit for storing luminous flux deviation data of the first to third light source units of each of the plurality of light emitting modules, wherein the first light source unit includes a plurality of first light emitting devices for emitting red light, and the second light source unit includes a plurality of second light emitting devices for emitting green light, and the third light source unit includes a plurality of third light emitting devices for emitting blue light, and the control unit controls currents of the first, second, and third light source units of the plurality of light emitting modules, respectively, according to an intensity value of an input current corresponding to the luminous flux deviation data.