Laser light source and laser projection display device

Patent metadata

Field	Value
Publication number	US-10317782-B2
Application number	US-201615172967-A
Country	US
Kind code	B2
Filing date	Jun 3, 2016
Priority date	Aug 4, 2015
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

A laser projection display device, relating to the technical field of laser, including a laser light source having a light source shell, an airtight device fixed on an inner wall of the light source shell, and a laser device provided in the interior of the airtight device. The airtight device having a sealing housing and a gas pressure adjustment structure, the sealing housing is fixed on an inner wall of the light source shell, the gas pressure adjustment structure is arranged on one side of the sealing housing, the sealing housing is communicated with the gas pressure adjustment structure, and the gas pressure adjustment structure is configured to adjust the volume of the airtight device.

First claim

What is claimed is:

1. A laser projection display device, comprising a laser light source, wherein the laser light source comprises a light source shell, an airtight device fixed on an inner wall of the light source shell, and a laser device provided in the interior of the airtight device; and
the airtight device comprises a sealing housing and a gas pressure adjustment structure, the sealing housing is fixed on an inner wall of the light source shell, the gas pressure adjustment structure is arranged to one side of the sealing housing, the sealing housing is communicated with the gas pressure adjustment structure, and the gas pressure adjustment structure is configured to adjust the volume of the airtight device;
wherein the gas pressure adjustment structure comprises: a gas chamber and a movable portion; the gas chamber comprises a first opening, and a second opening, the space between the movable portion and the first opening of the gas chamber forms a first cavity, the first cavity is communicated with the sealing housing via the first opening, the space between the movable portion and the second opening of the gas chamber forms a second cavity, the second cavity is communicated with the atmosphere via the second opening.

2. The laser projection display device according to claim 1 , wherein the movable portion is a piston arranged between the first opening and the second opening of the gas chamber along an inner wall of the gas chamber.

3. The laser projection display device according to claim 2 , wherein both the piston and the gas chamber are made of metal.

4. The laser projection display device according to claim 1 , wherein the movable portion is an elastic film; and an outer edge of the elastic film is sealed on the inner wall between the first opening and the second opening of the gas chamber; and the elastic film can expand and shrink between the first opening and the second opening of the gas chamber.

5. The laser projection display device according to claim 4 , wherein the gas chamber is made of metal and the elastic film is made of rubber or silicone.

6. The laser projection display device according to claim 1 , wherein the gas pressure adjustment structure is fixed on the sealing housing, and the sealing housing is communicated with the gas pressure adjustment structure through a through-hole structure.

7. The laser projection display device according to claim 6 , wherein the through-hole structure comprises a first through-hole formed on the sealing housing, and a second through-hole is foil led on the gas pressure adjustment structure, and the first through-hole and the second through-hole are communicated with each other through a conduit.

8. The laser projection display device according to claim 1 , wherein a filter structure is further provided between the sealing housing and the gas pressure adjustment structure; and
the filter structure is configured to filter a gas stream flowing between the sealing housing and the gas pressure adjustment structure.

9. A laser projection device, comprising:
a sealing housing;
a laser array, a beam shaping module, a fluorescence conversion module and a filter wheel, which are all arranged inside the sealing housing, light generated by the laser array enters the fluorescence conversion module via the beam shaping module, and the fluorescence conversion module is excited to emit fluorescence, the fluorescence is received and then output by a color filter and an output module;
wherein, a through-hole is arranged on the sealing housing, by which the gas pressure in an interior of the sealing housing is substantially not changed along with the change of temperature;
wherein, a ventilating filter net is arranged at the position where the through-hole is located, through which gas enters and exits the through-hole, the material of the ventilating filter net is waterproof breathable material.

10. The laser projection device according to claim 9 , wherein, the material of the ventilating filter net is ultralow penetration air filter material.

11. The laser projection device according to claim 9 , wherein, the material of the ventilating filter net is expended polytetrafluoroethylene.

12. The laser projection device according to claim 11 , wherein, the ventilating filter net is arranged between the through-hole and the first cavity.

13. The laser projection device according to claim 11 , wherein, the space inside the first cavity forms a completely sealed space together with the space inside the sealing housing communicated the first cavity via the through-hole.

14. The laser projection device according to claim 11 , wherein, the movable portion is a piston or an elastic film.

15. The laser projection device according to claim 9 , further comprising a gas pressure adjustment structure communicated with the through-hole, the gas pressure adjustment structure comprises: a gas chamber and a movable portion;
the gas chamber comprises a first opening, and a second opening, the space between the movable portion and the first opening of the gas chamber forms a first cavity, the first cavity is communicated with the through-hole via the first opening, the space between the movable portion and the second opening of the gas chamber forms a second cavity, the second cavity is communicated with the atmosphere via the second opening.

16. The laser projection device according to claim 9 , wherein, the sealing housing is a housing which is sealed, an inner space of the sealing housing is completely sealed except the position of the through-hole.

17. The laser projection device according to claim 9 , wherein, the sealing housing comprises a first sealing housing, a second sealing housing, and a third sealing housing, the laser array is arranged inside the first sealing housing, the beam shaping module is arranged inside the second sealing housing, the fluorescence conversion module and the filter wheel is arranged inside the third sealing housing.

18. The laser projection device according to claim 17 , wherein, the first sealing housing, the second sealing housing, and the third sealing housing form an entire sealed space.

19. The laser projection device according to claim 9 , wherein, the ventilating filter net is communicated with the atmosphere directly.

20. A laser projection device, comprising:
a first sealing housing and a laser array arranged inside the first sealing housing;
a second sealing housing and a beam shaping module arranged inside the second sealing housing;
a third sealing housing and a fluorescence conversion module and a color filter and output module arranged inside the third sealing housing;
a through-hole, arranged on at least one of the the first sealing housing, the second sealing housing, and the third sealing housing, by which the gas pressure in the interior of the at least one of the first sealing housing, the second sealing housing, and the third sealing housing are substantially not changed;
a ventilating filter net, arranged on the position of the through-hole, and gas enters and exits the through-hole through the ventilating filter net;
wherein, light generated by the laser array enters the fluorescence conversion module via the beam shaping module, and the fluorescence conversion module is excited to emit fluorescence, the fluorescence is received and then output by the color filter and output module;
wherein, a ventilating filter net is arranged at the position where the through-hole is located, through which gas enters and exits the through-hole,

Assignees

• Hisense Co Ltd
• Hisense Usa Corp
• Hisense Int Co Ltd

Inventors

• Liu Xianrong
• Tian Youliang

Classifications

• F21V15/01

  Housings, e.g. material or assembling of housing parts (F21V15/02 takes precedence {housings forming signs or letters G09F13/04}) · CPC title

• G03B21/16

  Cooling; Preventing overheating · CPC title

• G03B21/2033 Primary

  LED or laser light sources · CPC title

• F21V31/005

  Sealing arrangements therefor · CPC title

• F21V29/65

  the gas flowing in a closed circuit · CPC title