Illumination Device Airflow Path for LED Heat Dissipation
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Solution Overview
Problem
Existing illumination devices face challenges in effectively dissipating heat generated by LEDs while preventing water and foreign substances from entering the housing, which can compromise the device's performance and reliability.
Innovation Solution
The illumination device incorporates a blower fan and a thermally connected flow path that moves air from the internal space near the LED to a space between optical members, utilizing a blower fan to dissipate heat through a flow path formed by optical components, thereby cooling both the LED and other light sources while maintaining a dust-proof and drip-proof configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat is released through a path formed by the housing to outside, then heat dissipation is achieved, but water and foreign substances may enter the housing through the path
Solution Approach 1:
The patent divides the heat dissipation function into two separate paths: one path (first flow path) is dedicated for heat dissipation from the LED, and another path (second flow path) is dedicated for air circulation near the light source. This segmentation allows each path to be optimized independently - the first path can be designed for efficient heat removal while the second path can be designed to prevent water and foreign substance ingress, thereby resolving the contradiction between heat dissipation effectiveness and protection reliability.
Solution Approach 2:
The patent introduces a flow path component member as an intermediary structure that mediates between the LED heat dissipation requirement and the housing protection requirement. This component member forms part of the first flow path and includes a light source accommodating portion that positions the LED, allowing heat to be conducted away from the LED while the overall flow path design prevents water and foreign substances from entering through the housing.
2Temperature
If a blower fan is used to move air for cooling, then heat dissipation efficiency is improved, but device complexity increases
Solution Approach 1:
The flow path component member serves multiple functions simultaneously: it acts as a structural support for the LED (light source accommodating portion), forms part of the heat dissipation flow path, and contributes to preventing water and foreign substance ingress. By making this single component multi-functional, the patent reduces the need for additional separate parts that would increase device complexity, while still achieving effective cooling through the blower fan.
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 solution effectively dissipates heat from LEDs and other light sources, preventing excessive temperature rise and ensuring the device's reliability while maintaining dust-proof and drip-proof performance, even during continuous light emission.
Implementation Method 1
an air-movement mechanism configured to move air suctioned from a first space as an internal space closer to the first light source than the second optical member is and including the first light source, to a second space as a space between the first and second optical members
Implementation Method 2
a member included in a flow path of the air-movement mechanism is thermally connected to the second light source
Data Source
AI summary
An illumination device includes a first light source, a first optical member configured to transmit light emitted from the first light source, a second optical member placed between the first light source and the first optical member and configured to transmit light emitted from the first light source, an air-movement mechanism configured to move air suctioned from a first space as an internal space closer to the first light source than the second optical member is and including the first light source, to a second space as a space between the first and second optical members, and a second light source different from the first light source, wherein a member included in a flow path of the air-movement mechanism is thermally connected to the second light source.