Phosphor Plate Diameter Ratio for Miniaturization
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Solution Overview
Problem
Lighting devices using high power LEDs or lasers face challenges in miniaturization due to the need for a phosphor plate that balances light incident and emitting regions, which affects energy density and light distribution, and there is a risk of phosphor damage from high energy density.
Innovation Solution
A lighting device with a phosphor plate having a controlled ratio of light incident and emitting regions, utilizing a substrate, antireflection coating, short wavelength pass filter, and a bonding layer to adjust light distribution and prevent phosphor damage, allowing for adjustable performance without increasing device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the diameter of the light emitting surface of the lighting device is increased, then the energy density per area is reduced and phosphor plate damage is prevented, but the device size increases and miniaturization becomes difficult
Solution Approach 1:
The patent introduces a distance dimension between the light source and phosphor plate. By increasing the distance, the light emitting surface diameter can be increased without increasing the overall device volume, thus reducing energy density while preventing phosphor plate damage. This resolves the contradiction by utilizing the third dimension (distance) to achieve the desired effect.
Solution Approach 2:
The patent integrates the light source, phosphor plate, and housing into a compact nested structure. The light source is positioned within the housing, and the phosphor plate is arranged at a specific distance from the light source, allowing the system to achieve a larger light emitting surface without proportionally increasing the overall device volume.
2Volume of moving object
If the diameter of the light emitting surface of the lighting device is decreased, then the device size is reduced and miniaturization is achieved, but the energy density per area becomes too high and phosphor plate damage occurs
Solution Approach 1:
The patent uses the distance dimension to decouple the relationship between device size and energy density. By adjusting the distance between the light source and phosphor plate, the system can maintain low energy density (preventing damage) even with a compact device size, thus resolving the contradiction.
3Object-affected harmful factors
If a phosphor plate is used to convert excitation rays to visible light, then harmful effects on the human body are prevented, but the device complexity increases due to the need for additional conversion components
Solution Approach 1:
The phosphor plate serves multiple functions: it converts excitation rays to visible light, determines the light emitting surface diameter, and controls energy density distribution. This multi-functionality reduces the need for additional separate components, thereby minimizing device complexity while maintaining human body protection.
Solution Approach 2:
The patent combines the light conversion function and the light emitting surface definition function into a single phosphor plate component. This merging eliminates the need for separate conversion devices and light emitting structures, simplifying the overall device design while maintaining safety and performance.
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
Enables adjustable light performance and miniaturization of the lighting device by controlling the light emitting region's diameter relative to the incident region, while preventing phosphor plate damage from high energy density.
Implementation Method 1
a phosphor plate which includes a phosphor may be used as a conversion device
Implementation Method 2
a light conversion unit which is disposed in a direction in which laser rays are released and converts the laser rays; and a housing which includes an opening formed in a light emitting region of the phosphor plate
Data Source
AI summary
Embodiments of the present invention relate to a phosphor plate (24) and a lighting device including the phosphor plate (24), the phosphor plate (24) according to an embodiment of the present invention has a light incident region on which light generated from a light source (10) is incident and a light emitting region which converts a wavelength of the incident light and then outputs the light, wherein a ratio of a diameter of the light incident region (D1) and a diameter of the light emitting region (D2) ranges from 1 : 3 to 1 : 9.