Wavelength conversion device, and light source system and projection system therefor

Patent metadata

Field	Value
Publication number	US-10288872-B2
Application number	US-201415028928-A
Country	US
Kind code	B2
Filing date	Oct 8, 2014
Priority date	Oct 15, 2013
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

Disclosed are a wavelength conversion device, and a light source system and a projection system therefor. The wavelength conversion device comprises a supporting structure and a plurality of wavelength conversion modules arranged together, each wavelength conversion module comprising a ceramic carrier and a phosphor material provided thereon. The supporting structure ensures that the plurality of wavelength conversion modules remain fixed relative to one another. The light source system and the projection system both comprise the present wavelength conversion device. The use of ceramic material as the carrier for the phosphor material enables high temperature resistance, and prevents detachment of the phosphor material due to deformation at high temperatures. In addition, such a modular wavelength conversion device does not crack easily, and has a flexible design and shorter production cycle.

First claim

What is claimed is:

1. A wavelength conversion device, comprising a support structure and a plurality of wavelength conversion modules arranged together, wherein each of the plurality of wavelength conversion modules includes a ceramic carrier and a phosphor material attached to a top surface of the ceramic carrier, the ceramic carriers of different wavelength conversion modules being separate pieces of ceramic materials, wherein different phosphor materials are carried by different ceramic carriers, and wherein the support structure keeps the plurality of wavelength conversion modules in fixed positions relative to each other.

2. The wavelength conversion device of claim 1 , wherein the phosphor material carried by each ceramic carrier is a phosphor material that is excited to generate a monochromatic converted light.

3. The wavelength conversion device of claim 2 , wherein some of the different ceramic carriers carry the same phosphor material.

4. The wavelength conversion device of claim 2 , wherein the phosphor material in at least one of the wavelength conversion modules is coated on a surface of the ceramic carrier to form a phosphor layer.

5. The wavelength conversion device of claim 4 , wherein the phosphor layer further includes a first glass body that adheres the phosphor material together.

6. The wavelength conversion device of claim 4 , wherein the ceramic carriers are made of ceramic materials having thermal conductivities above 80 W/mK.

7. The wavelength conversion device of claim 4 , further comprising a reflective layer disposed between the phosphor layer and the surface of the ceramic carrier, wherein the reflective layer is a diffuse reflection layer which includes white scattering particles and a second glass body that adheres the white scattering particles together, or wherein the reflective layer is a total reflection film coated on the surface of the ceramic carrier.

8. The wavelength conversion device of claim 7 , wherein the total reflection film is a silver film or an aluminum film.

9. The wavelength conversion device of claim 2 , further comprising one or more additional wavelength conversion modules, wherein each additional wavelength conversion module includes a fluorescent ceramic piece formed by the ceramic carrier with the phosphor material dispersed inside.

10. The wavelength conversion device of claim 9 , wherein the fluorescent ceramic piece is YAG glass ceramic or sintered YAG ceramic piece.

11. The wavelength conversion device of claim 9 , wherein the least one of the additional wavelength conversion modules further includes, on a bottom surface of the fluorescent ceramic piece, a diffuse reflection layer which includes white scattering particles and a second glass body that adheres the white scattering particles together, or a total reflection film.

12. The wavelength conversion device of claim 11 , wherein the total reflection film is a silver film or an aluminum film.

13. The wavelength conversion device of claim 11 , wherein the least one of the additional wavelength conversion modules further includes a metal protection film over the total reflection film.

14. The wavelength conversion device of claim 1 , wherein the support structure includes a base plate, wherein the plurality of wavelength conversion modules are respectively affixed on one surface of the base plate, and wherein the phosphor material is located on a side of each wavelength conversion module that is farther away from the base plate.

15. The wavelength conversion device of claim 14 , wherein the base plate is made of a metal, a metal alloy, or a composite material of metal and inorganic materials.

16. The wavelength conversion device of claim 14 , wherein the base plate includes a ring shaped groove, and wherein the plurality of wavelength conversion modules each has an arc shape and are arranged together in a ring shape inside the ring shaped groove.

17. The wavelength conversion device of claim 14 , wherein the plurality of wavelength conversion modules are affixed to the base plate by adhesion or soldering, and wherein an adhesive agent used for adhesion is an organic adhesive, a silver adhesive or a slurry of silica gel mixed with high thermal conductivity filling particles.

18. The wavelength conversion device of claim 17 , wherein the high thermal conductivity filling particles include one or more particles selected from a group consisting of aluminum oxide, aluminum nitride, boron nitride, yttrium oxide, zinc oxide, and titanium oxide.

19. The wavelength conversion device of claim 17 , wherein some different ones of the plurality of wavelength conversion modules are affixed to the base plate using different means.

20. The wavelength conversion device of claim 1 , further comprising a drive mechanism for driving the support structure to move.

21. A light source system, comprising an excitation light source for generating an excitation light, and the wavelength conversion device of claim 1 , wherein the phosphor materials of the wavelength conversion device are located on a light path of the excitation light to convert the excitation light into converted lights for output.

22. A projection system for forming images, comprising the light source system of claim 21 .

Assignees

• Appotronics Corp Ltd

Inventors

• Li Qian
• Xu Yanzheng

Classifications

• F21V13/08

  the elements being filters or photoluminescent elements and reflectors · CPC title

• F21V9/08

  for producing coloured light, e.g. monochromatic; for reducing intensity of light (with provision for controlling the colour F21V9/40) · CPC title

• F21V9/45

  by adjustment of photoluminescent elements · CPC title

• F21V9/38

  Combination of two or more photoluminescent elements of different materials · CPC title

• F21V9/32

  characterised by the arrangement of the photoluminescent material · CPC title