Dual-color laser light source and laser projector

Patent metadata

Field	Value
Publication number	US-10139716-B1
Application number	US-201715857591-A
Country	US
Kind code	B1
Filing date	Dec 28, 2017
Priority date	Aug 18, 2017
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

The present application discloses a dual-color laser light source and a laser projector. In the laser light source, a light combining component is used to transmit a first blue laser to a fluorescent wheel, and the first blue laser irradiates a green fluorescent region to generate green fluorescence to be reflected to a light collecting component; the light combining component is also used to transmit second blue laser to the light collecting component; the light combining component is also used to reflect a red laser which is emitted by a red laser transmitter and transmitted by the transmission region to the light collecting component. 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 source, wherein, the laser light source comprises a first blue laser transmitter, a second blue laser transmitter, a red laser transmitter, a fluorescent wheel, a light collecting component and a light combining component, wherein the fluorescent wheel is provided with a green fluorescent region and a transmission region;
the light combining component is arranged between the first blue laser transmitter and the fluorescent wheel, wherein the fluorescent wheel is arranged between the light combining component and the red laser transmitter, and the light collecting component and the second blue laser transmitter are respectively arranged on both sides of the light combining component, and a connection line between the first blue laser transmitter and the fluorescent wheel is perpendicular to a connection line between the light collecting component and the second blue laser transmitter;
the light combining component is used to transmit first blue laser emitted by the first blue laser transmitter to the fluorescent wheel, and to reflect a green fluorescence to the light collecting component after receiving the green fluorescence generated by the first blue laser irradiating the green fluorescent region;
the light combining component is also used to receive a second blue laser emitted by the second blue laser transmitter, and to transmit the second blue laser to the light collecting component;
the light combining component is also used to receive a red laser which is emitted by the red laser transmitter and transmitted through the transmission region, and to reflect the red laser to the light collecting component.

2. The laser light source according to claim 1 , wherein, the red laser transmitter comprises: a first red laser transmitter and a second red laser transmitter; the red laser comprises: a first red laser and a second red laser;
the light combining component is also used to respectively reflect the first red laser and the second red laser to the light collecting component, wherein the first red laser and the second red laser are emitted by the first red laser transmitter and the second red laser transmitter and are transmitted through the transmission region;
wherein, a polarization direction of the first red laser is perpendicular to a polarization direction of the second red laser.

3. The laser light source according to claim 1 , wherein, the light combining component comprises a first dichroic sheet which is arranged on a light incident side of the light collecting component; and
the first dichroic sheet is used to transmit the first blue laser and the second blue laser, and to reflect the green fluorescence and the red laser.

4. The laser light source according to any of claim 1 , wherein, the laser light source also comprises a second dichroic sheet, and the fluorescent wheel is positioned between the second dichroic sheet and the light combining component;
a light emergent direction of the red laser transmitter is perpendicular to the axial direction of the fluorescent wheel;
the second dichroic sheet is used to reflect the red laser to the fluorescent wheel.

5. The laser light source according to claim 1 , wherein, a surface of the green fluorescent region is provided with green fluorescent powder, and a surface of the transmission region is provided with a first diffuser; and
the transmission region is used to transmit the red laser.

6. The laser light source according to claim 1 , wherein, the laser light source further comprises a fixed diffusion sheet which is arranged between the first blue laser transmitter and the light combining component, for homogenizing the first blue laser.

7. The laser light source according to claim 2 , wherein the first red laser is a p polarized light, the second red laser is a s polarized light; the first blue laser is a p polarized light; and the second blue laser is a s polarized light; or
alternatively, the first red laser is a s polarized light; the second red laser is a p polarized light; the first blue laser is a s polarized light; and the second blue laser is a p polarized light.

8. The laser light source according to claim 5 , wherein, the green fluorescent region is in a fan-shaped arrangement or a fan-shaped circular arrangement.

9. The laser light source according to claim 8 , wherein, the laser light source also comprises a focusing lens which is arranged between the first dichroic sheet and the color filter wheel;
the focusing lens is used to respectively focus the second blue laser transmitted through the first dichroic sheet, the red laser reflected by the first dichroic sheet and the green fluorescence reflected by the first dichroic sheet.

10. A laser projector, wherein, the laser projector comprises the dual-color laser light source of claim 1 .

11. A dual-color laser light source, wherein, the laser light source comprises a first blue laser transmitter, a second blue laser transmitter, a red laser transmitter, a fluorescent wheel, a light receiving component and a light combining component, wherein the fluorescent wheel is provided with a green fluorescent region and a transmission region;
the light combining component is arranged between the first blue laser transmitter and the fluorescent wheel; the fluorescent wheel is arranged between the light combining component and the second blue laser transmitter; the light collecting component and the red laser transmitter are respectively arranged on both sides of the light combining component; a connection line between the first blue laser transmitter and the fluorescent wheel is perpendicular to a connection line between the light collecting component and the red laser transmitter;
the light combining component is used to transmit first blue laser emitted by the first blue laser transmitter to the fluorescent wheel, and to reflect a green fluorescence to the light collecting component, after receiving the green fluorescence generated by the first blue laser irradiating the green fluorescent region;
the light combining component is also used to receive red laser emitted by the red laser transmitter, and to transmit the red laser to the light collecting component;
the light combining component is also used to receive a second blue laser which is emitted by the second blue laser transmitter and transmitted through the transmission region, and to reflect the second blue laser to the light collecting component;
wherein, a polarization direction of the second blue laser is perpendicular to a polarization direction of the first blue laser.

12. The laser light source according to claim 11 , wherein, the red laser transmitter comprises a first red laser transmitter and a second red laser transmitter; the red laser comprises a first red laser and a second red laser;
the light combining component is also used to respectively receive the first red laser emitted by the first red laser transmitter and the second red laser emitted by the second red laser transmitter, and to transmit the first red laser and the second red laser to the light collecting component;
wherein, a polarization direction of the first red laser is perpendicular to a polarization direction of the second red laser.

13. The laser light source according to claim 11 , wherein, the laser light source also comprises a second red laser transmitter; the red laser transmitter is a first red laser transmitter;
the second red laser transmitter and the second blue laser transmitter are arranged on a same side of the fluorescent wheel;
the light combining component is also used to reflect the second red laser to the light collecting compon

Assignees

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

Inventors

• Tian Youliang

Classifications

• G02B26/008

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

• 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

• G02B27/48

  Laser speckle optics · CPC title

• H04N9/3158

  for controlling the spectrum · CPC title