Dual-color laser light source and laser projector

Patent metadata

Field	Value
Publication number	US-10514595-B2
Application number	US-201816175725-A
Country	US
Kind code	B2
Filing date	Oct 30, 2018
Priority date	Aug 18, 2017
Publication date	Dec 24, 2019
Grant date	Dec 24, 2019

Abstract

The present application discloses a dual-color laser light projection device, wherein the dual-color laser light projection device includes a first blue laser transmitter, a second blue laser transmitter, a red laser transmitter, a light combining component, a fluorescent wheel, a light-pipe; wherein the fluorescent wheel comprises a green fluorescent region provided with a green fluorescent powder and a transmission region, and wherein the green fluorescent region is excited by a first blue laser emitted from the first blue laser transmitter to generates green fluorescence. The light path system of the present application is simple and has a small volume.

First claim

What is claimed is:

1. A dual-color laser light projection device, comprising a first blue laser transmitter configured to emit a first blue laser, a second blue laser transmitter configured to emit a second blue laser, a red laser transmitter configured to emit a red laser, a light combining component, a fluorescent wheel, a light-pipe; wherein the fluorescent wheel comprises a green fluorescent region provided with a green fluorescent powder and a transmission region, and wherein the green fluorescent region is configured to be excited by the first blue laser to generates green fluorescence;
the light combining component is disposed on a light path between the first blue laser transmitter and the fluorescent wheel, a light path between the light-pipe and the second blue laser transmitter and a light path between the light-pipe and the red laser transmitter;
the light combining component is configured to receive the first blue laser, and to emit the first blue laser to the fluorescent wheel;
the light combining component is also configured to receive the green fluorescence, the second blue laser and the red laser, and to emit the green fluorescence, the second blue laser and the red laser to the light-pipe.

2. The laser light source according to claim 1 , wherein, the first blue laser is incident to the light combining component along a first direction, and is emitted to the fluorescent wheel along a second direction; the green fluorescence, the second blue laser and the red laser are emitted to the light-pipe along a third direction.

3. The laser light source according to claim 2 , wherein, the first direction is substantially same with the second direction.

4. The laser light source according to claim 3 , wherein, the first blue laser transmitter and the fluorescent wheel are oppositely disposed on two sides of the light combining component.

5. The laser light source according to claim 3 , wherein, the first direction is substantially perpendicular to the third direction.

6. The laser light source according to claim 3 , wherein, the fluorescent wheel is disposed on a light path between the light combining component and the red laser transmitter, the fluorescent wheel is provided with the transmission region; the red laser transmitted from the transmission region is incident to the light combining component along a fourth direction, and the green fluorescence is incident to the light combining component along the fourth direction.

7. The laser light source according to claim 2 , wherein, the second blue laser of the second blue laser transmitter is incident to the light combining component along a direction substantially same with a third direction, and the light combining component is configured to emit the second blue laser to the light-pipe along the third direction.

8. The laser light source according to claim 2 , wherein, the red laser of the red laser transmitter is incident to the light combining component along a direction substantially same with the third direction, and the light combining component is configured to emit the red laser to the light-pipe along the third direction.

9. The laser light source according to claim 2 , wherein, the fluorescent wheel is disposed on a light path between the light combining component and the red laser transmitter and is disposed on an light path between the light combining component and the second blue laser transmitter, the red laser transmitted from the transmission region and the second blue laser transmitted by the transmission region are incident to the light combining component along a fourth direction, and the green fluorescence is incident to the light combining component along the fourth direction.

10. The laser light source according to claim 1 , wherein, a direction where the green fluorescence is emitted from the fluorescent wheel to the light combining component is substantially opposite to the direction where the first blue laser is emitted from the light combining component to the fluorescent wheel.

11. The laser light source according to claim 1 , wherein, the first blue laser transmitter is disposed in a fifth direction from the light combining component, the fluorescent wheel is disposed in a sixth direction from the light combining component, the light-pipe is disposed in a seventh direction from the light combining component, and the second blue laser transmitter is disposed in a eighth direction from the light combining component; the fluorescent wheel is disposed on a light path between the red laser transmitter and the light combining component, and the red laser is emitted from the transmission region to be incident to the light combining component, wherein the fifth direction, the sixth direction, the seventh direction, and the eighth direction are different.

12. The laser light source according to claim 11 , wherein, the first blue laser transmitter and the fluorescent wheel are oppositely disposed on two sides of the light combining component, the light combining component is configured to transmit the first blue laser and reflect the green fluorescence, and the fifth direction is parallel to the sixth direction, but a direction of the fifth direction is opposite to a direction of the sixth direction.

13. The laser light source according to claim 12 , wherein, the light-pipe and the second blue laser transmitter are oppositely disposed on two sides of the light combining component, the light combining component is configured to transmit the second blue laser, and the seventh direction is parallel to the eighth direction, but a direction of the seventh direction is opposite to a direction of the eighth direction.

14. The laser light source according to claim 1 , wherein, the first blue laser transmitter is disposed in a fifth direction from the light combining component, the fluorescent wheel is disposed in a sixth direction from the light combining component, the light-pipe is disposed in a seventh direction from the light combining component; the fluorescent wheel is disposed on an light path between the red laser transmitter and the light combining component and is disposed on an light path between the second blue laser transmitter and the light combining component, and the transmission region is configured to transmit the red laser, wherein the red laser emitted from the transmission region is incident to the light combining component, and the transmission region is configured to transmit the second blue laser, wherein the second blue laser transmitted from the transmission region is incident to the light combining component, wherein the fifth direction, the sixth direction and the seventh direction are different.

15. The laser light source according to claim 1 , wherein, the first blue laser transmitter is disposed in a fifth direction of the light combining component, the fluorescent wheel is disposed in a sixth direction of the light combining component, the light-pipe is disposed in a seventh direction of the light combining component, the second blue laser transmitter and the red laser transmitter are disposed in a eighth direction of the light combining component, wherein the fifth direction, the sixth direction, the seventh direction and the eighth direction are different.

Assignees

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

Inventors

• Tian Youliang

Classifications

• G02B6/4215

  the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers (G02B6/4246 takes precedence) · CPC title

• G02B27/141

  using dichroic mirrors · CPC title

• G02B26/008

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

• H04N9/3161

  using laser light sources (using laser beams scanning the display screen H04N9/3129) · 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