Wavelength conversion device, diffuse reflection layer, light source system and projection system

A technology of wavelength conversion device and diffuse reflection layer, which is applied in the direction of electric light source, reflector, projection device, etc., can solve the problems of reduced reflectivity and thermal stability, difficulty in ensuring uniformity, and low reflectivity, so as to improve thermal stability High performance, high reflectivity, cost reduction effect

Active Publication Date: 2015-05-06
APPOTRONICS CORP LTD
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  • Abstract
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Problems solved by technology

[0005] The problem of this kind of mirror aluminum substrate is: for the highly reflective silver layer with higher reflectivity, during use, silver atoms are easy to sulfide and oxidize with hydrogen sulfide and oxygen in the atmosphere to reduce the reflectivity. and thermal stability are drastically reduced; for highly reflective aluminum layers, aluminum is more stable than silver, but the reflectivity is not high
[0006] Therefore, under the current process condi

Method used

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  • Wavelength conversion device, diffuse reflection layer, light source system and projection system
  • Wavelength conversion device, diffuse reflection layer, light source system and projection system
  • Wavelength conversion device, diffuse reflection layer, light source system and projection system

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Embodiment Construction

[0032] Embodiments of the present invention will be described in detail below with reference to the drawings and implementation methods.

[0033] see figure 1 A first embodiment of the wavelength conversion device is shown. like figure 1 As shown, the wavelength conversion device includes a fluorescent layer 3 , a diffuse reflection layer 2 , and a thermally conductive substrate 1 which are stacked and fixed in sequence.

[0034] The fluorescent layer 3 contains fluorescent powder. When the excitation light with a specific wavelength range emitted by the light source is incident from the light-facing surface S2 of the fluorescent layer 3 facing the light source and irradiates on the phosphor, the phosphor can absorb the excitation light and be stimulated to generate light different from the wavelength of the excitation light, realizing the wavelength conversion function. The fluorescent powder of the present invention is, for example, YAG (yttrium aluminum garnet) fluoresc...

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Abstract

The embodiment of the invention discloses a wavelength conversion device, a diffuse reflection layer, a light source system and a projection system. The wavelength conversion device comprises a fluorescent layer containing fluorescent powder for realizing wavelength conversion, as well as the diffuse reflection layer attached to the backlight surface of the fluorescent layer; the diffuse reflection layer comprises white scattering particles and a first binding element bound with the white scattering particles; the ratio of the refractive index of the white scattering particles to that of the first binding element is greater than 1.2. After the invention is adopted, a thinner diffuse reflection layer can achieve high reflectivity, and the thinner diffuse reflection layer is beneficial to shortening of a heat conduction path of a luminous layer, so that the heat stability of the wavelength conversion device is improved.

Description

technical field [0001] The invention relates to the technical field of illumination and display, in particular to a wavelength conversion device, a diffuse reflection layer, a light source system and a projection system. Background technique [0002] At present, the high-speed rotating color wheel excited by blue light laser 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. [0003] 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...

Claims

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Application Information

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IPC IPC(8): F21V9/10F21V7/22F21V29/505F21S8/00G03B21/20F21V9/40
CPCF21V7/22F21V9/40G03B21/204G02B5/0242G02B5/0284G02B5/0294G02B26/008
Inventor 许颜正田梓峰李乾
Owner APPOTRONICS CORP LTD
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