Light source module, method of manufacturing light source module, and projection-type display unit

Patent metadata

Field	Value
Publication number	US-10824060-B2
Application number	US-201716321556-A
Country	US
Kind code	B2
Filing date	Jun 19, 2017
Priority date	Aug 19, 2016
Publication date	Nov 3, 2020
Grant date	Nov 3, 2020

Abstract

A light source module according to an embodiment of the present disclosure includes: a radiator; a plurality of light-emitting elements disposed on the radiator; a plurality of lenses that each convert a light beam outputted from corresponding one of the plurality of light-emitting elements into a collimated light beam and output the collimated light beam; a plurality of first optical elements that each reflect the collimated light beam outputted from corresponding one of the plurality of lenses while adjusting an optical axis direction of the collimated light beam; and a second optical element that multiplexes respective light beams reflected from the plurality of first optical elements.

First claim

The invention claimed is:

1. A light source system, comprising:
a radiator;
a plurality of light-emitting elements on a first surface of the radiator, wherein each light-emitting element of the plurality of light-emitting elements is configured to output a light beam;
a plurality of lenses on the radiator, wherein each lens of the plurality of lenses is configured to:
convert the light beam, outputted from a corresponding light-emitting element of the plurality of light-emitting elements, into a collimated light beam; and
output the collimated light beam;

a plurality of first optical elements on the radiator, wherein each first optical element of the plurality of first optical elements is configured to:
reflect the collimated light beam, outputted from a corresponding lens of the plurality of lenses, in a direction perpendicular to the first surface of the radiator; and
adjust an optical axis direction of the collimated light beam; and

a second optical element on the radiator, wherein the second optical element is configured to:
multiplex the collimated light beam reflected from each of the first optical element of the plurality of first optical elements; and
output the multiplexed collimated light beam.

2. The light source system according to claim 1 , wherein a difference between a thermal expansion coefficient of the radiator and a thermal expansion coefficient of the plurality of lenses is in a range from 0 ppm/K to 10 ppm/K.

3. The light source system according to claim 1 , wherein the plurality of first optical elements is fixable to a holding jig.

4. The light source system according to claim 3 , wherein the holding jig has an opening in an optical path of the light beam outputted from each light-emitting element of the plurality of light-emitting elements.

5. The light source system according to claim 3 , wherein
the radiator has a rectangular parallelepiped shape including the first surface, and a second surface in contact with the first surface,
the plurality of light-emitting elements, the plurality of lenses, and the holding jig on the first surface, and
the second optical element is on the second surface.

6. The light source system according to claim 3 , wherein
the holding jig extends, at least to a portion of a side surface of the radiator, with respect to a light output surface of a light-emitting element of the plurality of light-emitting elements, and
the holding jig has a top surface higher than a top surface of each light-emitting element of the plurality of light-emitting elements.

7. The light source system according to claim 1 , further comprising a sub-mount between each light-emitting element of the plurality of light-emitting elements.

8. The light source system according to claim 1 , wherein the plurality of lenses corresponds to an integrated collimated lens.

9. The light source system according to claim 1 , wherein
a first light-emitting element of the plurality of light-emitting elements is configured to output a first light beam,
a second light-emitting element of the plurality of light-emitting elements is configured to output a second light beam, and
the first light beam has a wavelength different from a wavelength of the second light beam.

10. The light source system according to claim 1 , wherein each light-emitting element of the plurality of light-emitting elements comprises one of a semiconductor laser or a super luminescent diode.

11. The light source system according to claim 1 , wherein the second optical element comprises a dichroic prism.

12. The light source system according to claim 1 , wherein the plurality of light-emitting elements are two-dimensionally disposed on the radiator.

13. A method of manufacturing a light source module, the method comprising:
disposing a plurality of light-emitting elements on a surface of a radiator, wherein each light-emitting element of the plurality of light-emitting elements is configured to output a light beam;
disposing a plurality of lenses on the radiator, wherein
each lens of the plurality of lenses is configured to:
convert the light beam, outputted from a corresponding light-emitting element of the plurality of light-emitting elements, into a collimated light beam; and
output the collimated light beam;

disposing a plurality of first optical elements on the radiator, wherein each first optical element of the plurality of first optical element is configured to:
reflect the collimated light beam, outputted from a corresponding lens of the plurality of lenses, in a direction perpendicular to the surface of the radiator; and
adjust an optical axis direction of the collimated light beam; and

disposing a second optical element on the radiator, wherein the second optical element is configured to:
multiplex the collimated light beam reflected from each of the first optical element of the plurality of first optical elements; and
output the multiplexed collimated light beam.

14. The method of manufacturing the light source module according to claim 13 , further comprising executing active implementation of each light-emitting element of the plurality of light-emitting elements after the plurality of lenses is disposed on the radiator.

15. The method of manufacturing the light source module according to claim 14 , further comprising disposing the second optical element and a holding jig on the radiator after the execution of the active implementation of the each light-emitting element of the plurality of light-emitting elements, wherein the plurality of first optical elements are fixable to the holding jig.

16. The method of manufacturing the light source module according to claim 15 , further comprising adjusting the plurality of first optical elements based on a beam profile of the multiplexed collimated light beam.

17. A projection-type display device, comprising:
a light source system that includes:
a radiator;
a plurality of light-emitting elements on a surface of the radiator;

wherein each light-emitting element of the plurality of light-emitting elements is configured to output a light beam;
a plurality of lenses on the radiator, wherein each lens of the plurality of lenses is configured to:
convert the light beam, outputted from a corresponding light-emitting element of the plurality of light-emitting elements, into a collimated light beam; and
output the collimated light beam;

a plurality of first optical elements on the radiator, wherein each first optical element of the plurality of first optical elements is configured to:
reflect the collimated light beam, outputted from a corresponding lens of the plurality of lenses, in a direction perpendicular to the surface of the radiator; and
adjust an optical axis direction of the collimated light beam; and

a second optical element on the radiator, wherein the second optical element is configured to:
multiplex the collimated light beam reflected from each of the first optical element of the plurality of first optical elements; and
output the multiplexed collimated light beam; and

a projection optical system configured to project the multiplexed collimated light beam outputted from the light source system.

18. A light source system, comprising:
a radiator;
a plurality of light-emitting elements on the radiator, wherein each light-emitting element of the plurality of light-emitting elements is configured to output a light beam;
a plurality of lenses on the radiator, wherein
each lens of the plurality of lenses is configured to:
convert the light beam,

Assignees

• Sony Corp

Inventors

• Motobayashi Hisayoshi
• Ono Tomoki

Classifications

• H01S5/0237

  by soldering · CPC title

• H01S5/02326

  Arrangements for relative positioning of laser diodes and optical components, e.g. grooves in the mount to fix optical fibres or lenses · CPC title

• H01S5/4012

  Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms · CPC title

• G02B27/10

  Beam splitting or combining systems (polarising systems G02B27/28; mixing and splitting light signals using optical waveguides G02B6/28; {beam shaping, e.g. changing the cross-sectional area, by dividing or superposing multiple light beams G02B27/0905}) · CPC title

• H01S5/02469

  Passive cooling, e.g. where heat is removed by the housing as a whole or by a heat pipe without any active cooling element like a TEC · CPC title