LED Cooling Fins with Shared Airflow Path
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Solution Overview
Problem
Existing projection display apparatuses face challenges in efficiently cooling light sources, leading to reduced LED output, image quality deterioration, and increased size due to complex airflow and pressure losses in cooling configurations.
Innovation Solution
A light source device with a support member hosting multiple LEDs, each with a heat receiving and releasing unit, and an air blowing unit that directs airflow between adjacent heat releasing units to enhance cooling efficiency, reducing pressure losses and size while maintaining effective heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a fan and airflow are provided to each light source device, then cooling efficiency is improved, but the number of fans increases leading to increased size
Solution Approach 1:
Multiple heat releasing units are merged into a single integrated structure with shared airflow path. The patent combines heat releasing units for multiple light sources (LEDs) into one unified cooling structure, allowing a single fan to cool multiple light sources simultaneously, thereby reducing the total number of fans while maintaining effective cooling.
Solution Approach 2:
A single fan serves multiple cooling functions by cooling multiple different light sources through the shared airflow path. The airflow path is designed to sequentially or simultaneously pass over multiple heat releasing units, making the single fan a universal cooling device for all light sources in the system.
2Temperature
If radiators are provided separately for each light source device, then heat dissipation is improved, but airflow becomes complicated leading to frequent pressure losses
Solution Approach 1:
Multiple radiators (heat releasing units) are merged into a single integrated structure with a unified airflow path. This consolidation creates a streamlined flow path that reduces turbulence and pressure losses compared to multiple separate radiator arrangements, while maintaining effective heat dissipation from all light sources.
3Volume of stationary object
If multiple light sources are cooled with a single fan, then the number of fans is reduced, but airflow becomes complicated causing frequent pressure losses
Solution Approach 1:
The airflow path is designed to move through multiple heat releasing units in a sequential or staged manner along an extended path, utilizing spatial arrangement in multiple dimensions. This dimensional arrangement allows efficient heat dissipation from multiple light sources while maintaining smooth airflow and minimizing pressure losses.
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 ensures efficient cooling of LEDs, maintaining image quality and extending their lifespan by optimizing airflow and heat transfer, resulting in a compact and effective cooling mechanism.
Implementation Method 1
a first heat receiving unit (12B) configured to receive heat generated by the first light source
Implementation Method 2
a first heat releasing unit (13B) configured to receive heat from the first heat receiving unit (12B) and release heat
Implementation Method 3
an air blowing unit configured to blow air to the first heat releasing unit (13B) and the second heat releasing unit (13R)
Implementation Method 4
a second heat transfer unit configured to transfer heat from the second heat receiving unit to the second heat releasing unit
Data Source
AI summary
A light source device includes heat releasing fins for cooling a blue light emitting diode (LED), a red LED, and a green LED, respectively, which are located next to each other in a direction in which a cooling fan blows air. A space formed between an upper surface of an optical unit and the heat releasing fins enable cooling air of the cooling fan to pass through the space.