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Wavelength conversion device, light source comprising same and projection device comprising same

A technology of wavelength conversion device and phosphor powder, applied in the parts, light source, lighting device and other directions of lighting device, can solve the problem of thermal quenching effect, etc., achieve high efficiency and reliability, high average reflectivity, high light conversion The effect of efficiency

Inactive Publication Date: 2019-03-05
APPOTRONICS CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In addition, the phosphor sheet in the laser light source is more likely to generate a lot of heat due to too high excitation light power density, resulting in thermal quenching effect

Method used

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  • Wavelength conversion device, light source comprising same and projection device comprising same
  • Wavelength conversion device, light source comprising same and projection device comprising same

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Embodiment

[0043] Next, the composition and structure of an exemplary wavelength conversion device of the present invention will be described through the following preparation examples.

[0044] The inventors found in research that, for the wavelength switching device, the particle size of the phosphor material in the light-emitting layer affects the light-emitting efficiency and yield (reliability). When the particle size of the phosphor material is in a specific range (5-20 μm), compared with the phosphor material with a smaller particle size (20μm), not only better yield rate, but also better luminous efficiency is achieved, and the yield rate here refers to the preparation Among the wavelength conversion device samples, the ratio of the samples whose reliability meets the requirements to the total number of samples.

[0045] In addition, the inventors also found that for the wavelength switching device, the particle size of the reflective particles in the reflective layer will furthe...

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Abstract

The invention relates to a wavelength conversion device, a light source comprising the same and a projection device comprising the same. The wavelength conversion device comprises a light emitting layer, a reflecting layer and a substrate which are stacked in sequence; the light emitting layer comprises a first organic adhesive and a fluorescent powder material; and the fluorescent powder materialis encapsulated to form a layer by the first organic adhesive serving as a matrix, wherein the particle size D50 of the fluorescent powder material is 5 to 20 [mu]m. According to the wavelength conversion device, the light source comprising the same and the projection device comprising the same, the stacking filling rate of the fluorescent powder particles in the light emitting layer and the reflecting particles in the reflecting layer of the wavelength conversion device is higher in the situation of ensuring high adhesion yield by controlling the fluorescent powder material in the wavelengthconversion device, preferably controlling the particle sizes of the reflecting particles and an encapsulating agent, so that the light emitting layer has higher light conversion efficiency and the reflecting layer has higher average reflectivity; and therefore, high efficiency and reliability of the wavelength conversion device can still be maintained under high exciting light power density.

Description

technical field [0001] The invention relates to a wavelength conversion device, a light source and a projection device including the wavelength conversion device. Background technique [0002] At present, the main application form of semiconductor light source is the traditional LED light source and the emerging laser light source. The laser light source adopts the technology of exciting phosphor materials with blue laser to obtain visible light. As a new light source system, laser light sources have great application prospects in the fields of lighting and display. In both LED light sources and laser light sources, phosphors are the core light wavelength conversion materials. The performance and packaging method of phosphors have a significant impact on the performance of light sources. [0003] However, LED light sources and laser light sources have different performances and working methods, and also have their own characteristics in the packaging of phosphor powder. ...

Claims

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Application Information

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IPC IPC(8): F21V9/40F21K9/64
CPCF21K9/64F21V9/08
Inventor 李乾陈雨叁许颜正
Owner APPOTRONICS CORP LTD