Light source apparatus and projection display apparatus

Patent metadata

Field	Value
Publication number	US-9874805-B2
Application number	US-201615008187-A
Country	US
Kind code	B2
Filing date	Jan 27, 2016
Priority date	Jan 30, 2015
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

A light source apparatus according to the present disclosure includes: a first light source unit which emits a blue light in a first direction; a second light source unit which emits a blue light in a second direction which intersects with the first direction; a split/combining optical element which splits the blue lights emitted from the first light source unit and the second light source unit, into a first optical path and a second optical path; a light emitting body which is provided on the first optical path and emits an emission light in response to an excitation light; and a combining optical element which combines the first optical path and the second optical path into one optical path.

First claim

What is claimed is:

1. A light source apparatus comprising:
a first light source unit which emits a blue light in a first direction;
a second light source unit which emits a blue light in a second direction which intersects with the first direction;
a split/combining optical element which splits the blue lights emitted from the first light source unit and the second light source unit, into a first optical path and a second optical path;
a light emitting body which is provided on the first optical path and emits an emission light in response to an excitation light; and
a combining optical element which combines the first optical path and the second optical path into one optical path,
wherein the split/combining optical element combines the blue light emitted from the first light source unit and split into the first optical path, and the blue light emitted from the second light source unit.

2. The light source apparatus according to claim 1 , wherein
the first light source unit and the second light source unit each include a plurality of light source blocks in which a plurality of light emitting elements is arranged; and
the blue light emitted from at least one of the plurality of light source blocks included in the first light source unit and the second light source unit is split into the second optical path.

3. The light source apparatus according to claim 1 , wherein the blue lights split into the first optical path and the second optical path have different wavelengths.

4. The light source apparatus according to claim 1 , wherein the combining optical element combines the emission light of the first optical path and the blue light of the second optical path into one optical path.

5. The light source apparatus according to claim 1 , wherein the split/combining optical element is an optical mirror in which a reflection area and a transmissive area are selectively formed to meet positions of a plurality of emission light fluxes from the first light source unit and the second light source unit, and is disposed so as to incline toward an emission direction of the blue lights emitted from the first light source unit and the second light source unit.

6. The light source apparatus according to claim 1 , wherein the split/combining optical element is an optical mirror in which a polarization mirror area and a transmissive area are selectively formed to meet positions of a plurality of emission light fluxes from the first light source unit and the second light source unit, and is disposed so as to incline toward an emission direction of the blue lights emitted from the first light source unit and the second light source unit.

7. A projection display apparatus comprising the light source apparatus according to claim 1 .

8. The light source apparatus according to claim 1 , wherein the split/combining optical element combines the blue light emitted from the second light source unit and split into the first optical path, and the blue light emitted from the first light source unit.

9. The light source apparatus according to claim 8 , wherein the split/combining optical element combines the blue light emitted from the first light source unit and split into the first optical path, and the blue light emitted from the second light source unit and split into the first optical path.

10. The light source apparatus according to claim 9 , wherein the split/combining optical element combines the blue light emitted from the first light source unit and split into the second optical path, and the blue light emitted from the second light source unit and split into the second optical path.

11. A light source apparatus comprising:
a first light source unit which emits a blue light in a first direction;
a second light source unit which emits a blue light in a second direction which intersects with the first direction;
a split/combining optical element which splits the blue lights emitted from the first light source unit and the second light source unit, into a first optical path and a second optical path;
a light emitting body which is provided on the first optical path and emits an emission light in response to an excitation light; and
a combining optical element which combines the first optical path and the second optical path into one optical path;
wherein the split/combining optical element is an optical mirror in which a polarization mirror area and a transmissive area are selectively formed to meet positions of a plurality of emission light fluxes from the first light source unit and the second light source unit, and is disposed so as to incline toward an emission direction of the blue lights emitted from the first light source unit and the second light source unit.

12. The light source apparatus according to claim 11 , wherein
the first light source unit and the second light source unit each include a plurality of light source blocks in which a plurality of light emitting elements is arranged; and
the blue light emitted from at least one of the plurality of light source blocks included in the first light source unit and the second light source unit is split into the second optical path.

13. The light source apparatus according to claim 11 , wherein the blue lights split into the first optical path and the second optical path have different wavelengths.

14. The light source apparatus according to claim 11 , wherein the split/combining optical element splits the blue light emitted from the first light source unit, into the first optical path and the second optical path, and combines the blue light emitted from the first light source unit and split into the first optical path, and the blue light emitted from the second light source unit.

15. The light source apparatus according to claim 11 , wherein the combining optical element combines the emission light of the first optical path and the blue light of the second optical path into one optical path.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Okuda Michihiro

Classifications

• G03B21/2013

  Plural light sources · CPC title

• G02B27/149

  using crossed beamsplitting surfaces, e.g. cross-dichroic cubes or X-cubes · 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

• G02B26/008

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

• G03B21/2066

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