Light source apparatus and projector

Patent metadata

Field	Value
Publication number	US-9876998-B2
Application number	US-201615040145-A
Country	US
Kind code	B2
Filing date	Feb 10, 2016
Priority date	Feb 17, 2015
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

A light source apparatus includes a light source, a substrate provided rotatably around a predetermined axis of rotation, a scattered light generator which is provided on the substrate and on which light from the light source is incident, a pickup lens provided on the light exiting side of the scattered light generator, and a holding member that holds the pickup lens, and at least one of the contour of a surface closest to the substrate among the surfaces of the holding member and the contour of a surface facing the substrate among the surfaces of the pickup lens is located inside the contour of the substrate when viewed in the direction parallel to the axis of rotation.

First claim

What is claimed is:

1. A light source apparatus comprising:
a light source;
a substrate provided rotatably around a predetermined axis of rotation;
a scattered light generator which is provided on the substrate and on which light from the light source is incident;
a pickup lens provided on a light exiting side of the scattered light generator; and
a holding member that holds the pickup lens,
wherein an entire contour of a surface of the holding member that is closest to the substrate is inside a contour of the substrate when viewed in a direction parallel to the axis of rotation, and
wherein the surface of the holding member that is closest to the substrate is closer to the substrate than a surface of the pickup lens facing the substrate is to the substrate.

2. The light source apparatus according to claim 1 ,
wherein the contour of the surface facing the substrate among surfaces of the pickup lens is located inside the contour of the substrate.

3. The light source apparatus according to claim 1 ,
wherein the scattered light generator is a phosphor layer that converts light incident from the light source into fluorescence and outputs the fluorescence.

4. The light source apparatus according to claim 3 ,
wherein the phosphor layer is made of an inorganic material.

5. The light source apparatus according to claim 1 ,
wherein the scattered light generator is a diffusion layer that diffuses light incident from the light source.

6. A projector comprising:
the light source apparatus according to claim 1 ;
a light modulator that modulates light from the light source apparatus in accordance with image information to form image light; and
a projection system that projects the image light.

7. A projector comprising:
the light source apparatus according to claim 2 ;
a light modulator that modulates light from the light source apparatus in accordance with image information to form image light; and
a projection system that projects the image light.

8. A projector comprising:
the light source apparatus according to claim 3 ;
a light modulator that modulates light from the light source apparatus in accordance with image information to form image light; and
a projection system that projects the image light.

9. A projector comprising:
the light source apparatus according to claim 4 ;
a light modulator that modulates light from the light source apparatus in accordance with image information to form image light; and
a projection system that projects the image light.

10. A projector comprising:
the light source apparatus according to claim 5 ;
a light modulator that modulates light from the light source apparatus in accordance with image information to form image light; and
a projection system that projects the image light.

Assignees

• Seiko Epson Corp

Inventors

• Kuroi Kiyoshi
• Egawa Akira

Classifications

• G02B27/1046

  for use with transmissive spatial light modulators · CPC title

• H04N9/317

  Convergence or focusing systems (electronic adjustment of convergence H04N9/3185; convergence or focusing arrangements for cathode ray tubes H04N9/28; means for automatic focusing of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/53) · CPC title

• G03B21/206

  Control of light source other than position or intensity · 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

• G03B21/22

  Soundproof bodies · CPC title