Light source apparatus and projector having light source apparatus

Patent metadata

Field	Value
Publication number	US-9456188-B2
Application number	US-201514838466-A
Country	US
Kind code	B2
Filing date	Aug 28, 2015
Priority date	Aug 29, 2014
Publication date	Sep 27, 2016
Grant date	Sep 27, 2016

Abstract

A light source apparatus and a Projector including the light source apparatus are provided. The light source apparatus comprises: a plurality of light sources each including a laser diode and a collimating lens, said collimating lens making a light emitted from said laser diode into an approximately collimated beam, a plurality of housings in which said plurality of light sources are placed so that a light is emitted from each of said light source advances approximately in parallel in the same direction, a condenser lens which condenses lights which is emitted from said plurality of housings to a phosphor, a phosphor wheel having said phosphor, said phosphor wheel transmitting the lights which is emitted from said condenser lens, wherein incident angles of the lights emitted from said housings to an optical axis of said condenser lens are made different by varying mount angles of said housings to a supporting member.

First claim

What is claimed is:

1. A light source apparatus comprising:
a plurality of light sources each including a laser diode and a collimating lens, said collimating lens making a light emitted from said laser diode into an approximately collimated beam,
a plurality of housings in which said plurality of light sources are placed so that each light emitted from each of said light source advances approximately in parallel in the same direction,
a condenser lens which condenses lights emitted from said plurality of housings to a phosphor,
a phosphor wheel having said phosphor, said phosphor wheel transmitting a light which is emitted from said condenser lens,
wherein incident angles of the lights emitted from said housings to an optical axis of said condenser lens are made different by varying mount angles of said housings to a supporting member.

2. The light source apparatus according to claim 1 ,
wherein, in said light source, a location of said collimating lens to said laser diode is shifted from a position of said collimating lens to emit the substantially collimated light.

3. The light source apparatus according to claim 1 ,
wherein, in said housing, said light sources are aligned in a short axis of a far field pattern of said laser diode, and the mount angles of said housings are varied in the direction of rotating around a long axis of a far field pattern of said laser diode.

4. The light source apparatus according to claim 1 ,
wherein said housings are mounted on the same supporting member, and mounted surfaces of said housings to said supporting member are slanted.

5. The light source apparatus according to claim 4 ,
wherein two of said housings being adjacent to each other are fixed to said supporting member with rotating by 180 degrees to each other approximately around an optical axis of the light which is emitted from said housings.

6. The light source apparatus according to claim 4 ,
wherein four of said housings being adjacent to one another are fixed to said supporting member with rotating by 90 degrees to one another around approximate an optical axis of the light which is emitted from said housings.

7. The light source apparatus according to claim 1 ,
wherein said housings are mounted on the same supporting member, and a mounting surface of said supporting member on which said housings are mounted is slanted.

8. The light source apparatus according to claim 4 ,
wherein the slant angle of the mounted surface of said housing or the mounting surface of said supporting member is in a range from 0.25 to 2 degrees.

9. The light source apparatus according to claim 1 ,
wherein the supporting member works as a heat dissipation member.

10. The light source apparatus according to claim 1 ,
wherein the wavelength of lights emitted from said housings ranges from 370 to 500 nm.

11. The light source apparatus according to claim 1 ,
wherein one of said phosphors is a phosphor which emits a light including a red light.

12. A projector comprising:
the light source apparatus according to claim 1 ,
a light modulating device which modulates lights emitted from the light source apparatus in the plurality of wavelength ranges to form an image based on an image data,
a projecting device which enlarges and projects the image.

Assignees

• Nichia Corp

Inventors

• Miyata Tadaaki
• Matsuo Hidenori

Classifications

• G02B26/008

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

• G03B21/2046

  Positional adjustment of light sources · CPC title

• G03B21/2006

  characterised by the light source · CPC title

• G03B21/2013

  Plural light sources · CPC title

• G03B21/16

  Cooling; Preventing overheating · CPC title