Wavelength conversion device and preparing method thereof, luminescent device and projection device

A wavelength conversion device and a technology of luminescent ceramics, which are applied in the fields of lighting and projection, can solve the problems of reduced excitation light utilization efficiency, low luminous brightness of light source, low collection rate of optical system, etc., so as to improve wavelength conversion efficiency, high heat dissipation efficiency, high brightness effect

Active Publication Date: 2018-02-13
APPOTRONICS CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, backscattering occurs with ceramic packaging
like figure 1 As shown in , when the excitation light 400 irradiates the luminescent ceramic layer 11, since the luminescent ceramic crystal grains 111 have the function of wavelength conversion and also have a scattering effect on the excitation light, part of the excitation light 401 is lost by backscattering, resulting in the excitation light The utilization efficiency is reduced, which in turn reduces the luminous brightness of the light source
At the same time, the thicker luminescent ceramics have a larger spot of the outgoing light due to the light guiding effect, and the collection rate of the optical system is lower.

Method used

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  • Wavelength conversion device and preparing method thereof, luminescent device and projection device
  • Wavelength conversion device and preparing method thereof, luminescent device and projection device
  • Wavelength conversion device and preparing method thereof, luminescent device and projection device

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Experimental program
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Embodiment 1

[0061] see figure 2 , figure 2 It is a structural schematic diagram of Embodiment 1 of the present invention. Such as figure 2 As shown, the wavelength conversion device is composed of a first luminescent ceramic layer 11 , a second luminescent ceramic layer 12 and a reflective layer 13 stacked in sequence.

[0062] In this embodiment, the first luminescent ceramic layer 11 is a transparent luminescent ceramic layer, and the first luminescent ceramic layer 11 includes first luminescent ceramic grains 111; the first luminescent ceramic grains are garnet luminescent ceramic grains or aluminate luminescent ceramic grains. Ceramic grains, can be YAG:Ce, Ca 3 (Al,Sc) 2 Si 3 o 12 、(Gd,Tb,Y,Lu) 3 (Al,Ga) 5 o 12 and composite component Y 3 Mg 2 AlSi 2 o 12 at least one of the It should be noted that, in addition to the first luminescent ceramic grains 111, the first luminescent ceramic layer 11 may also include a matrix, and the first luminescent ceramic grains 111 ar...

Embodiment 2

[0075] Such as Figure 4 As shown, in this embodiment, on the basis of the first embodiment, an anti-reflection film 14 is coated on the surface of the first luminescent ceramic layer 11 . The function of the anti-reflection film 14 is to reduce the reflection of the incident excitation light on the surface of the first luminescent ceramic layer 11 and improve the incidence efficiency of the incident excitation light. It should be noted that only the surface of a relatively dense ceramic material can be coated with an anti-reflective coating, and the luminescent ceramic layer selected in the present invention meets this requirement.

Embodiment 3

[0077] Such as Figure 5 As shown, in this embodiment, on the basis of the first embodiment, a rough microstructure 15 is formed on the surface of the first luminescent ceramic layer 11; further, the rough microstructure 15 is a sawtooth structure. Preferably, the protruding shape of the sawtooth structure may be one of circular, oval, wave, trapezoidal, rectangular, and triangular, or a combination of at least two of them. The depth of the rough microstructure is 0.4um-0.8um. The rough microstructure can reduce the angle range of the outgoing light and improve the efficiency of subsequent collection of the stimulated outgoing light.

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Abstract

The invention provides a wavelength conversion device and a preparing method thereof, a luminescent device and a projection device. The wavelength conversion device comprises a first luminescent ceramic layer, a second luminescent ceramic layer and a reflection layer, and the first luminescent ceramic layer, the second luminescent ceramic layer and the reflection layer are laminated in sequence; the first luminescent ceramic layer is a transparent luminescent ceramic layer and comprises first luminescent ceramic crystalline grains; the second luminescent ceramic layer is a semi-transparent luminescent ceramic layer, and comprises second luminescent ceramic crystalline grains and scattering units; the size of the scattering units accounts for 0.01%-10% of that of the second luminescent ceramic layer; the reflection layer is a metal reflection layer or a diffuse reflection layer. The wavelength conversion device is high in thermal stability, cooling efficiency and luminous intensity, andis applicable to a large-power laser device and a large-power LED excitation light source.

Description

technical field [0001] The invention relates to the technical field of illumination and projection, in particular to a wavelength conversion device and a preparation method thereof, a light emitting device and a projection device. Background technique [0002] With the development of display and lighting technology, the original halogen bulb as a light source is increasingly unable to meet the high power and high brightness requirements of display and lighting. Visible light of various colors can be obtained by using excitation light emitted by a solid-state light source such as an LD (Laser Diode, laser diode) to excite wavelength conversion materials, and this technology is increasingly used in lighting and display. This technology has the advantages of high efficiency, low energy consumption, low cost, and long life, and is an ideal alternative to existing white or monochromatic light sources. [0003] At present, the packaging methods of phosphor powder are mainly organ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/02H01S5/024H01S5/026
CPCH01S5/02H01S5/02469H01S5/026
Inventor 田梓峰郑鹏许颜正
Owner APPOTRONICS CORP LTD
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