Wavelength conversion element, method of manufacturing wavelength conversion element, light source device, and projector

Patent metadata

Field	Value
Publication number	US-10725367-B2
Application number	US-201916357668-A
Country	US
Kind code	B2
Filing date	Mar 19, 2019
Priority date	Mar 20, 2018
Publication date	Jul 28, 2020
Grant date	Jul 28, 2020

Abstract

A wavelength conversion element according to the invention includes a wavelength conversion layer having a plurality of air holes, and excited by light in a first wavelength band to thereby generate light in a second wavelength band different from the first wavelength band, a transparent member adapted to seal a recessed section occurring on a first surface of the wavelength conversion layer due to the air hole, a reflecting layer disposed so as to be opposed to the first surface of the wavelength conversion layer, and a base member disposed so as to be opposed to the reflecting layer, and the transparent member is disposed in some of the plurality of air holes.

First claim

What is claimed is:

1. A wavelength conversion element comprising: a wavelength conversion layer having a plurality of air holes, and configured to be excited by light in a first wavelength band to thereby generate light in a second wavelength band different from the first wavelength band, the plurality of air holes being embedded in the wavelength conversion layer, with some of the plurality of air holes completely within the wavelength conversion layer; a transparent member adapted to seal a recessed section occurring on a first surface of the wavelength conversion layer due to the air hole; a reflecting layer disposed so as to be opposed to the first surface of the wavelength conversion layer; and a base member disposed so as to be opposed to the reflecting layer, wherein the transparent member is disposed in some of the plurality of air holes.

2. The wavelength conversion element according to claim 1 , wherein
the transparent member is also disposed on at least a part of a side surface in the wavelength conversion layer.

3. The wavelength conversion element according to claim 1 , further comprising:
a first layer disposed between the wavelength conversion layer and the reflecting layer,
wherein the transparent member is disposed on an opposite side to the first layer with respect to the reflecting layer.

4. The wavelength conversion element according to claim 2 , further comprising:
a first layer disposed between the wavelength conversion layer and the reflecting layer,
wherein the transparent member is disposed on an opposite side to the first layer with respect to the reflecting layer.

5. The wavelength conversion element according to claim 3 , wherein
the transparent member is disposed on a side surface of the first layer.

6. The wavelength conversion element according to claim 4 , wherein
the transparent member is disposed on a side surface of the first layer.

7. A light source device comprising:
the wavelength conversion element according to claim 1 ; and
a light source adapted to emit the light in the first wavelength band toward the wavelength conversion element.

8. A light source device comprising:
the wavelength conversion element according to claim 2 ; and
a light source adapted to emit the light in the first wavelength band toward the wavelength conversion element.

9. A light source device comprising:
the wavelength conversion element according to claim 3 ; and
a light source adapted to emit the light in the first wavelength band toward the wavelength conversion element.

10. A light source device comprising:
the wavelength conversion element according to claim 5 ; and
a light source adapted to emit the light in the first wavelength band toward the wavelength conversion element.

11. A projector comprising:
the light source device according to claim 7 ;
a light modulation device adapted to modulate light from the light source device in accordance with image information to thereby form image light; and
a projection optical system adapted to project the image light.

12. A projector comprising:
the light source device according to claim 8 ;
a light modulation device adapted to modulate light from the light source device in accordance with image information to thereby form image light; and
a projection optical system adapted to project the image light.

13. A projector comprising:
the light source device according to claim 9 ;
a light modulation device adapted to modulate light from the light source device in accordance with image information to thereby form image light; and
a projection optical system adapted to project the image light.

14. A projector comprising:
the light source device according to claim 10 ;
a light modulation device adapted to modulate light from the light source device in accordance with image information to thereby form image light; and
a projection optical system adapted to project the image light.

15. A method of manufacturing a wavelength conversion element, the method comprising:
forming a wavelength conversion layer having a plurality of air holes;
forming a transparent member adapted to seal a recessed section generated due to the air holes by dipping at least a first surface having the recessed section out of the wavelength conversion layer in a predetermined solution, and then calcining the predetermined solution; and
forming a reflecting layer at a position opposed to the first surface of the wavelength conversion layer.

16. The method of manufacturing the wavelength conversion element according to claim 15 , wherein
in the forming the transparent member, at least a part of a side surface crossing the first surface in the wavelength conversion layer is dipped in the predetermined solution.

17. A method of manufacturing a wavelength conversion element, the method comprising:
forming a wavelength conversion layer having a plurality of air holes and a recessed section generated due to the air holes;
forming a first layer at a position opposed to a first surface of the wavelength conversion layer;
forming a reflecting layer on an opposite side to the wavelength conversion layer of the first layer; and
forming a transparent member adapted to seal the recessed section by dipping the first layer and the reflecting layer in a predetermined solution after the forming the reflecting layer, and then calcining the predetermined solution.

Assignees

• Seiko Epson Corp

Inventors

• Yokoo Tomohiro
• Tadachi Kei

Classifications

• G03B21/16

  Cooling; Preventing overheating · CPC title

• G03B21/006

  using LCD's · CPC title

• G03B21/204 Primary

  using secondary light emission, e.g. luminescence or fluorescence (using different colours G03B33/00; if related to video signals H04N9/3197) · CPC title

• G03B21/2066

  Reflectors in illumination beam (in projection beam G03B21/28) · CPC title