Laser based display method and system

• US 9,019,437 B2
• Filed: 06/17/2014
• Issued: 04/28/2015
• Est. Priority Date: 05/29/2009
• Status: Active Grant

• Current Assignee: Kyocera SLD Laser Incorporated (Kyocera Corporation)
• Original Assignee: Soraa Laser Diode, Inc. (Kyocera Corporation)
• Inventors: Raring, James W., Rudy, Paul
• Primary Examiner(s): Harold, Jefferey
• Assistant Examiner(s): HAIEM, SEAN N
• Application Number:
  US14/307,214
• Publication Number:
  US 20140293139A1
• Time in Patent Office: 315 Days
• US Class Current: 348/766
• CPC Class Codes: G03B 21/2033 LED or laser light sources
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof
• CPC Class Codes: H04N 2005/745 Control circuits therefor
• CPC Class Codes: H04N 2005/7483 for colour television
• CPC Class Codes: H04N 5/74 Projection arrangements for image reproduction, e.g. using eidophor
• CPC Class Codes: H04N 5/7441 the modulator being an array of liquid crystal cells
• CPC Class Codes: H04N 5/7475 Constructional details of television projection apparatus
• CPC Class Codes: H04N 9/31 Projection devices for colour picture display , e.g. using electronic spatial light modulators [ESLM]
• CPC Class Codes: H04N 9/3129 scanning a light beam on the display screen scanning a light beam on a screen in displays other than projection devices G09G3/02; scanning systems in general G02B26/10; projectors using laser light sources in general H04N9/3161
• CPC Class Codes: H04N 9/3132 using one-dimensional electronic spatial light modulators

Abstract

The present invention is directed to display technologies. More specifically, various embodiments of the present invention provide projection display systems where one or more laser diodes are used as light source for illustrating images. In one set of embodiments, the present invention provides projector systems that utilize blue and/or green laser fabricated using gallium nitride containing material. In another set of embodiments, the present invention provides projection systems having digital lighting processing engines illuminated by blue and/or green laser devices. In one embodiment, the present invention provides a 3D display system. There are other embodiments as well.

Claims

1. A projection system comprising:

an input interface for receiving one or more frames of images;

a LCOS (Liquid Crystal on Silicon) chip;

an edge emitting laser diode configured to emit laser light onto the LCOS chip, the edge emitting laser diode being characterized by a non-polar or semi-polar orientation formed on a gallium and nitrogen containing material; and

a power source electrically coupled to the edge emitting laser diode.

2. The projection system of claim 1 wherein the edge emitting laser diode is at least one of a green laser diode, a blue laser diode, or a red laser diode, and wherein the edge emitting laser diode is configured on a mounting surface.

3. The projection system of claim 1 further comprising a condensing lens coupled to the edge emitting laser diode.

4. The projection system of claim 1 further comprising a projection lens coupled to the edge emitting laser diode and the LCOS chip.

5. The projection system of claim 1 wherein the edge emitting laser diode is one of a red laser diode, a green laser diode, or a blue laser diode.

6. The projection system of claim 1 wherein the edge emitting laser diode is characterized by a {20-21} orientation.

7. The projection system of claim 1 wherein the edge emitting laser diode is a green laser diode characterized by a semi-polar orientation.

8. The projection system of claim 1 wherein the edge emitting laser diode is a blue laser diode characterized by a semi-polar orientation.

9. The projection system of claim 1 wherein the edge emitting laser diode is a blue laser diode characterized by a non-polar orientation.

10. The projection system of claim 1 wherein the edge emitting laser diode is characterized by a spectral width of about 0.5 nm to 2 nm.

11. The projection system of claim 1 wherein further comprising a dichroic filter coupled to the edge emitting laser diode.

12. A projection system comprising:

an interface for receiving images or video signal;

a LCOS (Liquid Crystal on Silicon) chip;

an edge emitting laser diode configured to emit laser light onto the LCOS chip, the edge emitting laser diode being operable in the 490-540 nm wavelength range and characterized by a {20-21} semi-polar orientation, the edge emitting laser diode comprising a stripe region characterized by a cavity orientation substantially in a projection of a c-direction; and

a power source electrically coupled to the edge emitting laser diode.

13. A projection system comprising:

an interface for receiving images or video signal;

a LCOS (Liquid Crystal on Silicon) chip;

an edge emitting laser diode formed on a gallium and nitrogen containing material, the edge emitting laser diode configured to emit laser light onto the LCOS chip, the edge emitting laser diode having a wavelength of about 490 nm to 540 nm; and

a power source electrically coupled to the edge emitting laser diode.

14. The projection system of claim 13 wherein the edge emitting laser diode is characterized by a semipolar {20-21} orientation.

15. The projection system of claim 13 wherein the edge emitting laser diode is characterized by a semipolar {20-21} orientation and comprises a stripe region characterized by a cavity orientation substantially in a projection of a c-direction.

16. The projection system of claim 13 wherein the edge emitting laser diode is characterized by a c-plane orientation.

17. The projection system of claim 13 wherein the edge emitting laser diode is also operable in a 430-480 nm wavelength range and is characterized by a c-plane orientation.

18. The projection system of claim 13 wherein the edge emitting laser diode is also operable in the 430-480 nm wavelength range and is characterized by a nonpolar or semipolar orientation.

19. The projection system of claim 13 wherein the edge emitting laser diode is comprised of GaAlInP material.

20. The projection system of claim 13 wherein edge emitting laser diode is characterized by a spectral width of about 0.5 nm to 2 nm.