Deep-UV Vehicle Light Layout for Thin Housing and Cooling
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Solution Overview
Problem
Existing light emitting devices for vehicles, particularly those emitting deep ultraviolet light, face challenges in reducing their projection dimension when mounted on a ceiling, which increases the cooling efficiency requirements due to higher energy output.
Innovation Solution
A light emitting device with a housing design that includes a cooling fan device in one section and a light emitter in another, arranged laterally next to each other, with a board member and LEDs configured to emit deep-UV light efficiently while minimizing thickness and enhancing cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the light emitter emits deep ultraviolet light with higher energy output, then virus removal effectiveness is improved, but cooling efficiency requirements increase and device thickness must be reduced
Solution Approach 1:
The patent transitions from a vertical stacking arrangement (irradiating means above photocatalyst-containing member) to a lateral arrangement where the cooling fan device and light emitter are positioned side-by-side. This dimensional change allows the cooling system to operate effectively without increasing the projection dimension from the ceiling, thereby reducing device thickness while maintaining high energy output for deep ultraviolet light emission.
Solution Approach 2:
The patent introduces a board member as an intermediary structure that serves multiple functions: it supports the light emitting element, defines the discharge cavity, and facilitates lateral heat dissipation. This intermediary component enables the cooling system to manage the high energy output of deep ultraviolet LEDs without requiring increased device thickness.
2Temperature
If the cooling fan device and light emitter are arranged vertically with heat storage between them, then cooling function is achieved, but the projection dimension from the ceiling increases
Solution Approach 1:
The patent repositions the cooling fan device and light emitter from a vertical arrangement to a lateral arrangement. The cooling fan device is now positioned adjacent to the light emitter rather than above or below it, allowing heat dissipation to occur in a lateral direction parallel to the ceiling surface. This eliminates the need for vertical projection space while maintaining effective cooling of the high-power deep ultraviolet light emitting elements.
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 solution effectively reduces the thickness of the light emitting device while maintaining high cooling efficiency, allowing for effective virus removal in vehicle compartments with improved safety by minimizing headroom requirements.
Implementation Method 1
a cooling fan device arranged in the first section... The first section has an air intake hole and the second section has an air discharge hole
Implementation Method 2
a first light emitting element mounted on the second surface of the board member... configured to emit deep-UV light
Data Source
AI summary
A light emitting device to be mounted on a mount surface of a vehicular compartment includes a housing including a first section having an air intake hole and a cooling fan and a second section having an air discharge hole and a light emitter. The light emitter includes a board member having a first surface that is opposite the mount surface and a second surface that is an opposite surface of the first surface and on which a light emitting element is mounted. The housing further includes a discharge cavity having the discharge hole, and a top wall and a bottom wall that are opposite each other. The top wall includes a cavity upper wall section near the discharge hole. The cavity upper wall section has an opposite surface facing the first surface of the board member and extending parallel to the first surface.