Light Mixing Chamber Grooves for LED Thermal and Optical Management
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Solution Overview
Problem
Conventional luminaires with LEDs in light mixing chambers suffer from poor heat management and low light output efficiency due to inadequate heat dissipation and light reflectivity.
Innovation Solution
A light mixing chamber design featuring grooves in the side walls to expose the back surface of the LED substrate for improved heat dissipation and hide the front surface for enhanced light reflectivity, allowing for better thermal management and increased light output efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the LED substrate is fully enclosed in the light mixing chamber, then light reflectivity is improved, but heat dissipation deteriorates
Solution Approach 1:
The patent divides the interaction between the LED substrate and light mixing chamber into two distinct zones: a first groove that exposes the back surface for heat dissipation, and a second groove that encloses the front surface for light reflection. This segmentation allows simultaneous optimization of both heat management and light output efficiency.
Solution Approach 2:
Different regions of the LED substrate are treated differently: the back surface is exposed to air for heat dissipation while the front surface is enclosed for light reflection. This local differentiation of quality allows each region to perform its specific function optimally without compromising the other.
2Temperature
If the LED substrate is exposed to the surrounding environment, then heat dissipation is improved, but light reflectivity deteriorates
Solution Approach 1:
The patent creates separate grooves for heat dissipation and light reflection functions. The first groove exposes the back surface to the surrounding environment for heat dissipation, while the second groove encloses the front surface with high light reflective surfaces, thus resolving the contradiction between heat dissipation and light reflectivity.
3Ease of manufacture
If conventional light mixing chamber design is used, then manufacturing is simplified, but heat management and light output efficiency deteriorate
Solution Approach 1:
The light mixing chamber is divided into multiple grooves with specific functions: first grooves for heat dissipation and second grooves for light reflection. This segmented design maintains manufacturing simplicity while significantly improving light output efficiency and heat management compared to conventional enclosed designs.
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 design enhances heat dissipation and light output efficiency by exposing the back surface of the LED substrate and utilizing high light reflective surfaces within the chamber, while also facilitating easier installation and replacement of the LED substrate.
Implementation Method 1
a backside of the LED substrate may be exposed to the surrounding environment, e.g. air. As a result, improved heat dissipation from the LED substrate may be achieved. This since heat may be dissipated directly from the LED substrate to the surrounding environment.
Implementation Method 2
heat may be dissipated directly from the LED substrate to the surrounding environment
Implementation Method 3
the side walls of the light mixing chamber may be made such that light reflective properties are much better than for light reflective properties of the front surface of the LED substrate. Hence, an inside area of the light mixing chamber having light reflective properties may be increased.
Data Source
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Figure 3
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AI summary
The present invention relates to a light mixing chamber (100). The light mixing chamber (100) comprising: a first light mixing chamber part (120) comprising a light exit window (122) and a first side wall (124) having a first groove (126); a second light mixing chamber part (140) comprising a bottom wall (142) and a second side wall (144) having a second groove (146); and an LED substrate (160) supporting a plurality of LEDs (162,164,166,168). The LED substrate (160) is arranged into the first (126) and second grooves (146), interconnecting the first and the second light mixing chamber parts (120,140) such that the light mixing chamber (100) is formed. The plurality of LEDs (162,164,166,168) of the LED substrate (160) is facing an inner cavity (180) of the light mixing chamber (100).