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Diffuse reflection material, diffuse reflection layer, wavelength conversion apparatus and light source system

一种波长转换装置、漫反射层的技术，应用在漫反射层,漫反射材料,波长转换装置,光源系统领域，能够解决发光稳定性不好等问题，达到兼顾光效和热稳定性、增强导热作用、提升发光稳定性的效果

Active Publication Date: 2016-07-06
APPOTRONICS CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the use of highly reflective particles of submicron-sized alumina and auxiliary particles of titanium dioxide with strong hiding power can achieve high reflectivity at a thinner thickness, but the wavelength conversion device formed by this material cannot be used under high power density laser excitation. Luminescence stability is not good under

Method used

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  • Diffuse reflection material, diffuse reflection layer, wavelength conversion apparatus and light source system
  • Diffuse reflection material, diffuse reflection layer, wavelength conversion apparatus and light source system
  • Diffuse reflection material, diffuse reflection layer, wavelength conversion apparatus and light source system

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preparation example Construction

[0039] The above-mentioned diffuse reflection layer can be prepared by using the existing technology. In a preferred embodiment of the present invention, the preparation method of the above-mentioned diffuse reflection layer includes the following steps: high-reflection scattering particles with a whiteness greater than 90, high-refraction scattering particles Particles, high thermal conductivity scattering particles, binder and organic carrier are mixed to form a mixed material; the mixed material is coated on the surface of the substrate and sintered to form a diffuse reflection layer. Preferably, the above coating step adopts the method of scraping coating, spin coating or screen printing, wherein the method of scraping coating is preferably used. The scraping method is beneficial to improve the orientation of flake scattering particles, increase the contact area between particles, and then improve the thermal conductivity. Preferably, in the above-mentioned sintering step ...

Embodiment 1

[0062] Raw materials: 0.1g of alumina (spherical particle size 0.2μm), 0.6g of titanium oxide (spherical particle size of 0.2μm), boron nitride (flat shape, length in the flat direction is 0.7μm, length in the thickness direction is 0.02μm ) 0.4g, glass powder 1g.

[0063] Preparation method: mix aluminum oxide, titanium dioxide, boron nitride, and glass powder with 1 g of organic carrier (organic carrier is terpineol, butyl carbitol acetate, ethyl cellulose) to form a mixed material, and mix The material is scraped on the surface of the aluminum nitride substrate, sintered at 800°C, and the steps of scraping and sintering are repeated to form a diffuse reflection layer with a thickness of 30 μm, and the measured reflectance of the diffuse reflection layer is 92.4%.

Embodiment 2

[0065]Raw materials: 0.08g of magnesium oxide (spherical particle size 0.3μm), 0.7g of zirconia (spherical particle size of 0.3μm), aluminum nitride (rod shape, length in the longitudinal direction is 1.0μm, length in the circumferential diameter direction is 0.02μm ) 0.3g, glass powder 1g.

[0066] Preparation method: Mix the above-mentioned magnesium oxide, zirconium oxide, aluminum nitride, and glass powder with 1 g of organic carrier (the organic carrier is an aqueous solution of PVA) to form a mixed material, and scrape the mixed material on the surface of the silicon nitride substrate above, sintered at 600°C, repeating the steps of scraping and sintering to form a diffuse reflection layer with a thickness of 30 μm, and the measured reflectance of the diffuse reflection layer is 90.8%.

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Abstract

The invention discloses a diffuse reflection material, a diffuse reflection layer, a wavelength conversion apparatus and a light source system. The diffuse reflection material includes white scattering particles and an adhesive. The white degree of the white scattering particles is higher than 85. The white scattering particles include high-reflective scattering particles being higher than 90 in white degree, high-refractive scattering particles being not less than 2.0 in refractive index, and high-heat-conductive scattering particles being boron nitride and / or aluminum nitride particles in the shapes of pieces, rods, boards, flat pieces or bars. With the scattering particles being higher than 85 in the white degree and through the high-reflective effect of the high-reflective scattering particles, the thinning effect of the high-refractive scattering particles, and the heat conduction enhancing effect of the high-heat-conductive scattering particles, high reflectivity and the reduction of the thickness of the diffuse reflection layer are synergistically achieved, so that the wavelength conversion apparatus has both high photo-efficiency and high thermal stability, and further is improved in luminescence stability with excitation of high power laser.

Description

technical field [0001] The invention relates to the field of optical energy, in particular to a diffuse reflection material, a diffuse reflection layer, a wavelength conversion device and a light source system. Background technique [0002] At present, blue light laser excitation of high-speed rotating color wheel can effectively solve the problem of thermal quenching of phosphors, making high-efficiency and low-cost laser display a reality, and gradually develops into one of the mainstream technologies of laser light sources. In this solution, the light source includes an excitation light source and a wavelength conversion device, wherein the wavelength conversion device includes a reflective substrate, a phosphor sheet coated on the reflective substrate, and a motor for driving the reflective substrate to rotate, so that the excitation from the excitation light source The light spots formed by the light on the phosphor sheet act on the phosphor sheet in a circular path. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85G02B5/02
CPCG02B1/00C04B41/86C09K5/14G02B5/0242F21V7/30F21V13/14C04B35/62222C04B35/63C04B2235/3217C04B2235/3232C04B2235/386C03C8/16C03C8/20C03C14/004C03C2209/00C03C2214/04C04B41/5022
Inventor 田梓峰徐虎李乾
Owner APPOTRONICS CORP LTD
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