Optimal Colors for a Laser Pico-Beamer

• US 20090003390A1
• Filed: 12/18/2006
• Published: 01/01/2009
• Est. Priority Date: 12/20/2005
• Status: Abandoned Application

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Hoving, Willem
• Application Number:
  US12/158,417
• Publication Number:
  US 20090003390A1
• Time in Patent Office: Days
• US Class Current: 372/4
• 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

Abstract

A laser beam projector employs a light engine including a semiconductor laser platform (20) emitting a plurality of infrared laser beams and a frequency converter (30) emitting a plurality of primary color laser beams as a frequency conversion of the plurality of infrared laser beams, wherein each primary color laser beam has a primary color wavelength corresponding to a high sensitivity of a human eye. The laser beam projector further employs a laser beam mixer (40) emitting a projection laser beam as a mixture of the plurality of primary color laser beams.

Claims

1. A light engine for a laser beam projector, the light engine comprising:

a semiconductor laser (20) operable to emit an infrared laser beam; and

a frequency converter (30) operable to be in optical communication with the semiconductor laser (20) to emit a primary color laser beam as a frequency conversion of the infrared laser beam, wherein the primary color laser beam has a primary color wavelength corresponding to a high sensitivity of a human eye.

2. The light engine of claim 1, wherein the primary color laser beam is a red laser beam having a red color wavelength corresponding to the high sensitivity of the human eye.

3. The light engine of claim 2, wherein the red color wavelength approximates 630 nanometers.

4. The light engine of claim 1, wherein the primary color laser beam is a green laser beam having a green color wavelength corresponding to the high sensitivity of the human eye.

5. The light engine of claim 4, wherein the green color wavelength approximates 540 nanometers.

6. The light engine of claim 1, wherein the primary color laser beam is a blue laser beam having a blue color wavelength corresponding to the high sensitivity of the human eye.

7. The light engine of claim 6, wherein the blue color wavelength approximates 450 nanometers.

8. The light engine of claim 1, wherein the semiconductor laser (20) is a vertical cavity surface emitting laser (21) operable to emit the infrared laser beam.

9. The light engine of claim 1, wherein the frequency converter (21) includes an optical waveguide (32) operable to be in optical communication with the semiconductor laser (20) to double a frequency of the infrared laser beam.

10. The light engine of claim 1,

wherein the semiconductor laser (20) is a vertical cavity surface emitting laser (21) operable to emit the infrared laser beam;

and

wherein the frequency converter (21) includes an optical waveguide (32) operable to be in optical communication with the vertical cavity surface emitting laser (21) to double a frequency of the infrared laser beam.

11. A laser beam projector, comprising:

a light engine including;

a semiconductor laser platform (20) operable to emit a plurality of infrared laser beams; and

a frequency converter (30) operable to be in optical communication with the semiconductor laser platform (20) to emit a plurality of primary color laser beams as a frequency conversion of the plurality of infrared laser beams, wherein each primary color laser beam has a primary color wavelength corresponding to a high sensitivity of a human eye; and

a laser beam mixer (40) operable to be in optical communication with the frequency converter (30) to emit a projection laser beam as a mixture of the plurality of primary color laser beams.

12. The laser beam projector of claim 11, wherein at least one of the primary color laser beams is a red laser beam having a red color wavelength corresponding to the high sensitivity of the human eye.

13. The laser beam projector of claim 12, wherein the red color wavelength approximates 630 nanometers.

14. The laser beam projector of claim 11, wherein at least one of the primary color laser beams is a green laser beam having a green color wavelength corresponding to the high sensitivity of the human eye.

15. The laser beam projector of claim 14, wherein the green color wavelength approximates 540 nanometers.

16. The laser beam projector of claim 11, wherein at least one of the primary color laser beams is a blue laser beam having a blue color wavelength corresponding to the high sensitivity of the human eye.

17. The laser beam projector of claim 16, wherein the blue color wavelength approximates 450 nanometers.

18. The laser beam projector of claim 11, wherein the semiconductor laser platform (20) includes a vertical cavity surface emitting laser (21) operable to emit a first infrared laser beam.

19. The laser beam projector of claim 11, wherein the frequency converter (21) includes an optical waveguide (32) operable to be in optical communication with the semiconductor laser platform (20) to double a frequency of a first infrared laser beam.

20. The laser beam projector of claim 11,

wherein the semiconductor laser platform (20) includes a vertical cavity surface emitting laser (21) operable to emit a first infrared laser beam;

and

wherein the frequency converter (21) includes an optical waveguide (32) operable to be in optical communication with the vertical cavity surface emitting laser (21) to double a frequency of the first infrared laser beam.

21. The laser beam projector of claim 11, wherein the primary color laser beam mixer (40) includes a plurality of prisms (42) optically aligned to mix the primary color laser beams.