Illumination device and projector

Patent metadata

Field	Value
Publication number	US-2016170199-A1
Application number	US-201414903958-A
Country	US
Kind code	A1
Filing date	Aug 1, 2014
Priority date	Aug 5, 2013
Publication date	Jun 16, 2016
Grant date	—

Abstract

An illumination device including a light source device, a rotary diffusion plate, which includes a first surface, a second surface, a diffusion section disposed on the first surface, and a detection section disposed on at least one of the first surface and the second surface, and to which light from the light source device is input, a light collecting optical system to which light from the diffusion section is input, a detector adapted to detect light from the detection section, and a control device adapted to control the light source device in accordance with a signal output from the detector. The detection section is disposed at a position different from a position where the light from the light source device enters the diffusion section.

First claim

1 - 12 . (canceled)

13 . An illumination device comprising:
a light source device; a rotary diffusion plate, which includes a first surface, a second surface, a diffusion section disposed on the first surface, and a detection section disposed on at least one of the first surface and the second surface, and to which light from the light source device is input; a light collection optical system to which light from the diffusion section is input; a detector adapted to detect light from the detection section; and a control device adapted to control the light source device in accordance with a signal output from the detector, wherein the detection section is disposed at a position different from a position where the light from the light source device enters the diffusion section.

14 . The illumination device according to claim 13 , wherein
the detection section blocks at least a part of the light input.

15 . The illumination device according to claim 14 , wherein
the detection section is disposed on the second surface.

16 . The illumination device according to claim 13 , wherein
the detection section diffuses at least a part of the light input.

17 . The illumination device according to claim 16 , wherein
the detection section is disposed on the first surface.

18 . The illumination device according to claim 16 , wherein
the detector is disposed at a position distant from an extension line of a principal ray of the light input to the detection section.

19 . The illumination device according to claim 13 , wherein
the light source device includes a first light source and a second light source, light from the first light source enters the diffusion section, and light from the second light source enters the detection section.

20 . The illumination device according to claim 19 , wherein
the light emitted from the first light source and the light emitted from the second light source are different in wavelength band from each other.

21 . The illumination device according to claim 13 , wherein
the detection section reflects at least a part of the light input.

22 . The illumination device according to claim 13 , wherein
the detection section includes a plurality of detection patterns disposed in a dashed manner along a rotational direction of the rotary diffusion plate.

23 . The illumination device according to claim 13 , wherein
the diffusion section is a phosphor layer.

24 . A projector comprising:
an illumination device adapted to emit illumination light; a light modulation device adapted to modulate the illumination light in accordance with image information to thereby form image light; and a projection optical system adapted to project the image light, wherein the illumination device according to claim 13 is used as the illumination device.

25 . A projector comprising:
an illumination device adapted to emit illumination light; a light modulation device adapted to modulate the illumination light in accordance with image information to thereby form image light; and a projection optical system adapted to project the image light, wherein the illumination device according to claim 14 is used as the illumination device.

26 . A projector comprising:
an illumination device adapted to emit illumination light; a light modulation device adapted to modulate the illumination light in accordance with image information to thereby form image light; and a projection optical system adapted to project the image light, wherein the illumination device according to claim 16 is used as the illumination device.

27 . A projector comprising:
an illumination device adapted to emit illumination light; a light modulation device adapted to modulate the illumination light in accordance with image information to thereby form image light; and a projection optical system adapted to project the image light, wherein the illumination device according to claim 19 is used as the illumination device.

28 . A projector comprising:
an illumination device adapted to emit illumination light; a light modulation device adapted to modulate the illumination light in accordance with image information to thereby form image light; and a projection optical system adapted to project the image light, the illumination device according to claim 21 is used as the illumination device.

29 . A projector comprising:
an illumination device adapted to emit illumination light; a light modulation device adapted to modulate the illumination light in accordance with image information to thereby form image light; and a projection optical system adapted to project the image light, wherein the illumination device according to claim 22 is used as the illumination device.

30 . A projector comprising:
an illumination device adapted to emit illumination light; a light modulation device adapted to modulate the illumination light in accordance with image information to thereby form image light; and a projection optical system adapted to project the image light, wherein the illumination device according to claim 23 is used as the illumination device.

Assignees

• Seiko Epson Corp

Inventors

• Inoue Nozomu
• Miyamae Akira
• Yanase Shigehiro
• Shindo Hiroyuki

Classifications

• H04N9/3158

  for controlling the spectrum · CPC title

• G03B21/2013

  Plural light sources · CPC title

• G02B26/008 Primary

  in the form of devices for effecting sequential colour changes, e.g. colour wheels · CPC title

• G03B21/204

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

• G03B21/206

  Control of light source other than position or intensity · CPC title