Lighting Apparatus Housing Slits Heat Dissipation
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Solution Overview
Problem
Low-power, high-efficiency light sources for vehicles require phosphor conversion to produce white light, but this process reduces light efficiency and is prone to reliability issues due to high-temperature degradation, and existing solutions struggle with miniaturization and heat radiation.
Innovation Solution
A lighting apparatus with a laser light source, a light conversion unit containing a phosphor layer, and a housing with slits that adjusts light distribution and enhances heat radiation, allowing for closer placement of the light source and phosphor unit, thereby improving efficiency and miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light source and phosphor are disposed spaced apart to radiate heat, then reliability is improved, but the lighting apparatus cannot be miniaturized
Solution Approach 1:
The patent transitions from one-dimensional heat radiation (spacing components apart) to three-dimensional heat management by incorporating the housing as a heat dissipation structure with thermal conduction pathways, allowing close component spacing while maintaining reliable operation through enhanced heat sinking capability
Solution Approach 2:
The housing is designed to perform multiple functions simultaneously: it provides mechanical protection, directs light distribution through its optical surface, and serves as a heat dissipation structure through thermal conduction features, thereby enabling miniaturization without compromising reliability
2Illumination intensity
If a phosphor conversion unit is used to convert light to white light, then white light is achieved, but light efficiency is reduced
Solution Approach 1:
The patent applies local quality by positioning the phosphor conversion material only in specific regions where conversion is needed, while maintaining direct transmission paths for unconverted light, thereby preserving overall light efficiency while achieving white light output in targeted areas
3Temperature
If the light source and phosphor are disposed spaced apart, then heat radiation is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the housing structure with the heat dissipation function by integrating thermal conduction pathways and heat sinking features directly into the housing design, eliminating the need for separate heat management components and simplifying the overall apparatus structure
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 enhances light distribution, maintains reliability by reducing phosphor degradation, and improves heat radiation efficiency, enabling the miniaturization of the lighting apparatus while reducing manufacturing costs.
Implementation Method 1
a phosphor layer that generates a converted light which is excited by the laser light
Implementation Method 2
the housing includes a plurality of slits, it is able to improve performance of radiation of heat through the housing
Data Source
Figure 1~2
Figure 3~4a
Figure 4b
AI summary
The embodiment relates to a lighting apparatus which is improved in terms of a light distribution property and a performance of radiating heat, including: a light source which generates laser light; a light conversion unit which is disposed in a direction that the laser light is emitted, and includes a phosphor layer that generates a converted light which is excited by the laser light; and a housing which covers a side surface of the phosphor layer, and is disposed on a light emitting surface of the light conversion unit, wherein the housing includes an opening which exposes a first surface of the phosphor layer, and a plurality of slits.