Separate LED Heat Dissipation for Projection Modules
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Solution Overview
Problem
Conventional LED illumination modules face challenges in maintaining the heat dissipation efficiency of red LEDs, which are sensitive to temperature, due to shared heat dissipation elements with green and blue LEDs, leading to deteriorated light-emitting efficiency and color shift.
Innovation Solution
The illumination module separates heat dissipation elements for different color LEDs, with red LEDs connected to heat dissipation elements at the upstream of air flow for rapid heat dissipation, while green and blue LEDs are connected downstream, utilizing separate heat conducting units and air flow to maintain optimal temperature and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If red LEDs, green LEDs, and blue LEDs share the same heat dissipation element, then the overall heat dissipation structure is simplified, but the heat conductivity for red LEDs becomes insufficient leading to deterioration of light-emitting efficiency and color shift
Solution Approach 1:
The patent divides the heat dissipation system into separate components: a first heat dissipation element for red LEDs and a second heat dissipation element for green and blue LEDs. This segmentation allows each LED type to have dedicated heat dissipation pathways, ensuring that red LEDs receive sufficient heat conductivity to maintain light-emitting efficiency and color stability, while the overall structure remains manageable through functional division
2Reliability
If separate heat dissipation elements are used for red LEDs and green/blue LEDs, then heat conductivity for red LEDs is improved, but the overall module volume increases
Solution Approach 1:
The patent implements a nested configuration where the first heat dissipation element for red LEDs is positioned within or integrated with the second heat dissipation element for green and blue LEDs. This nesting approach allows separate heat dissipation pathways for different LED types while utilizing shared space, thereby improving heat conductivity for red LEDs without significantly increasing the overall module volume
3Productivity
If heat dissipation elements are arranged along air flow path, then heat dissipation efficiency is improved, but the arrangement complexity increases
Solution Approach 1:
The patent positions the first heat dissipation element for red LEDs at the upstream side of the air flow path, before the second heat dissipation element for green and blue LEDs. This preliminary arrangement ensures that cool air first passes through the region with red LEDs, providing optimal cooling conditions for the most temperature-sensitive component, thereby maximizing heat dissipation efficiency with a straightforward sequential layout
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 design ensures that all LEDs operate within a normal temperature range, maintaining luminous efficiency and color stability, and reduces the overall volume and complexity of the module, improving the display quality of projection apparatus.
Implementation Method 1
The heat pipe 130 is connected between the heat conducting block 120 and the heat dissipation element 140, and the heat generated by the red LED 110a, the green LED 110b, and the blue LED 110c when emitting light beams is dissipated through the same heat conducting block 120, the heat pipe 130, and the heat dissipation element 140 sequentially
Implementation Method 2
The heat dissipation element 140 has a plurality of heat sinks 142, so that the heat dissipation element 140 has a larger heat dissipation area
Implementation Method 3
Light-emitting diodes (LED), having advantages of long lifespan, small volume, power saving, low pollution, high reliability, and mass production, etc. are used as a light source in illumination modules
Data Source
AI summary
An illumination module including a first light-emitting element, a first heat dissipation element, a first heat conducting unit, a second light-emitting element, a second heat dissipation element, and a second heat conducting unit is provided. The first light-emitting element is capable of emitting a first color light beam. The first heat conducting unit is connected between the first light-emitting element and the first heat dissipation element. The second light-emitting element is capable of emitting a second color light beam. The second heat conducting unit is connected between the second light-emitting element and the second heat dissipation element. The first heat dissipation element and the second heat dissipation element are disposed separately. The first heat conducting unit and the second heat conducting unit are also disposed separately. The heat dissipation characteristic of the illumination module is better. A projection apparatus having the illumination module is also provided.