Wavelength conversion element, light source device, and projector

Patent metadata

Field	Value
Publication number	US-9206959-B2
Application number	US-201313758385-A
Country	US
Kind code	B2
Filing date	Feb 4, 2013
Priority date	Feb 7, 2012
Publication date	Dec 8, 2015
Grant date	Dec 8, 2015

Abstract

A wavelength conversion element includes a substrate, and a fluorescent material layer disposed on the substrate. The volume concentration of the fluorescent material in the fluorescent material layer is equal to or higher than 15 vol %.

First claim

What is claimed is:

1. A wavelength conversion element comprising:
a fluorescent material layer including a fluorescent material and a binder,
wherein a volume concentration of the fluorescent material in the fluorescent material layer is one of equal to and higher than 15 vol %, and
wherein a thickness of the fluorescent material layer is greater than 30 μm.

2. The wavelength conversion element according to claim 1 , wherein
the volume concentration of the fluorescent material in the fluorescent material layer is one of equal to and higher than 17 vol %.

3. The wavelength conversion element according to claim 1 , wherein
the volume concentration of the fluorescent material in the fluorescent material layer is one of equal to and lower than 50 vol %.

4. The wavelength conversion element according to claim 3 , wherein
the volume concentration of the fluorescent material in the fluorescent material layer is lower than 50 vol %.

5. The wavelength conversion element according to claim 1 , wherein
the thickness of the fluorescent material layer is one of equal to and smaller than 150 μm.

6. The wavelength conversion element according to claim 5 , wherein
the thickness of the fluorescent material layer is one of equal to and smaller than 100 μm.

7. A light source device comprising:
the wavelength conversion element according to claim 1 ; and
an excitation light source adapted to excite the wavelength conversion element.

8. A light source device comprising:
the wavelength conversion element according to claim 2 ; and
an excitation light source adapted to excite the wavelength conversion element.

9. A light source device comprising:
the wavelength conversion element according to claim 3 ; and
an excitation light source adapted to excite the wavelength conversion element.

10. A light source device comprising:
the wavelength conversion element according to claim 4 ; and
an excitation light source adapted to excite the wavelength conversion element.

11. A light source device comprising:
the wavelength conversion element according to claim 5 ; and
an excitation light source adapted to excite the wavelength conversion element.

12. A light source device comprising:
the wavelength conversion element according to claim 6 ; and
an excitation light source adapted to excite the wavelength conversion element.

13. The light source device according to claim 7 , wherein
the excitation light source includes a plurality of solid-state light emitting elements, and
an excitation light emitted by the excitation light source is collected to thereby be incident on the wavelength conversion element.

14. The light source device according to claim 7 , wherein
the fluorescent material layer is rotated to thereby sequentially change an irradiation position irradiated by the excitation light source with respect to the fluorescent material layer.

15. A projector comprising:
the light source device according to claim 7 ;
a light modulation element adapted to modulate light emitted from the light source device with an image signal; and
a projection optical system adapted to project the light modulated by the light modulation element.

16. A projector comprising:
the light source device according to claim 13 ;
a light modulation element adapted to modulate light emitted from the light source device with an image signal; and
a projection optical system adapted to project the light modulated by the light modulation element.

17. A projector comprising:
the light source device according to claim 14 ;
a light modulation element adapted to modulate light emitted from the light source device with an image signal; and
a projection optical system adapted to project the light modulated by the light modulation element.

18. The wavelength conversion element according to claim 1 , wherein the thickness of the fluorescent material layer is at least 50 μm.

19. The wavelength conversion element according to claim 18 , wherein the thickness of the fluorescent material layer is one of equal to and smaller than 150 μm.

Assignees

• Seiko Epson Corp

Inventors

• Kashiwagi Akihiro
• Nojima Shigeo
• Miyamae Akira
• Egawa Akira

Classifications

• H04N9/3158

  for controlling the spectrum · CPC title

• H05B33/14

  characterised by the chemical or physical composition or the arrangement of the electroluminescent material {, or by the simultaneous addition of the electroluminescent material in or onto the light source} · CPC title

• H04N9/3111

  for displaying the colours sequentially, e.g. by using sequentially activated light sources (sequential projection in colour photography G03B33/08) · 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

• F21V9/30 Primary

  Elements containing photoluminescent material distinct from or spaced from the light source (shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40) · CPC title