Optical display systems and methods

• US 7,450,311 B2
• Filed: 06/18/2004
• Issued: 11/11/2008
• Est. Priority Date: 12/12/2003
• Status: Expired due to Fees

• Current Assignee: Luminus Devices Incorporated (Sanan Optoelectronics Company Limited)
• Original Assignee: Luminus Devices Incorporated (Sanan Optoelectronics Company Limited)
• Inventors: Erchak, Alexei A., Lidorikis, Eleftrios, Graff, John W.
• Primary Examiner(s): Harrington; Alicia M
• Application Number:
  US10/872,335
• Publication Number:
  US 20050127375A1
• Time in Patent Office: 1,607 Days
• Field of Search: 359/634, 257/72, 313/512, 445/24, 362/326, 349 61- 66, 345/36, 345/46, 345/55, 345/87
• US Class Current: 359/634
• CPC Class Codes: G03B 21/204 using secondary light emission, e.g. luminescence or fluorescence using different colours G03B33/00; if related to video signals H04N9/3197
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/01004 Beryllium [Be]
• CPC Class Codes: H01L 2924/01012 Magnesium [Mg]
• CPC Class Codes: H01L 2924/01019 Potassium [K]
• CPC Class Codes: H01L 2924/0102 Calcium [Ca]
• CPC Class Codes: H01L 2924/01021 Scandium [Sc]
• CPC Class Codes: H01L 2924/01025 Manganese [Mn]
• CPC Class Codes: H01L 2924/01063 Europium [Eu]
• CPC Class Codes: H01L 2924/01078 Platinum [Pt]
• CPC Class Codes: H01L 2924/01079 Gold [Au]
• CPC Class Codes: H01L 2924/01322 Eutectic Alloys, i.e. obtained by a liquid transforming into two solid phases
• CPC Class Codes: H01L 2924/12041 LED
• CPC Class Codes: H01L 2933/0083 Periodic patterns for optical field-shaping in or on the semiconductor body or semiconductor body package, e.g. photonic bandgap structures
• CPC Class Codes: H01L 33/10 with a light reflecting structure, e.g. semiconductor Bragg reflector
• CPC Class Codes: H01L 33/20 with a particular shape, e.g. curved or truncated substrate
• 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 9/315 Modulator illumination systems general applications of lighting devices F21V; general optical systems G02B; lamp houses for projectors not peculiar to the presence of an electronic spatial light modulator G03B21/20
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

Optical display systems and methods are disclosed.

Claims

1. An optical display system, comprising:

a microdisplay having a surface; and

a light emitting device, the light emitting device including;

a multi-layer stack of materials including a light generating region, and a first layer supported by the light generating region, a surface of the first layer being configured so that the light generated by the light generating region can emerge from the light emitting device via the surface of the first layer;

wherein a ratio of an aspect ratio of the surface of the microdisplay and an aspect ratio of the surface of the first layer is from about 0.5 to about two, and

wherein the light generated by the light emitting device illuminates the surface of the microdisplay and the microdisplay is configured to project an image.

2. The optical display system of claim 1, wherein the ratio of the aspect ratio of the surface of the microdisplay and the aspect ratio of the surface of the first layer is from about 9/16 to about 16/9.

3. The optical display system of claim 1, wherein the ratio of the aspect ratio of the surface of the microdisplay and the aspect ratio of the surface of the first layer is from about 3/4 to about 4/3.

4. The optical display system of claim 1, further comprising at least one optical component disposed between the light emitting device and the microdisplay.

5. The optical display system of claim 4, wherein the at least one optical component is a lens.

6. The optical display system of claim 1, comprising a plurality of light emitting diodes.

7. The optical display system of claim 1, wherein the aspect ratio of the microdisplay is selected from a group consisting of 640×

480, 800×

600, 1024×

700, 1024×

768, 1024×

720, 1280×

720, 1280×

768, 1280×

960, 1920×

1080 and 1280×

1064.

8. The optical display system of claim 1, wherein a shape of the surface of the microdisplay is rectangular, circular, trapezoidal, triangular, square, elliptical, or hexagonal.

9. The optical display system of claim 8, wherein a shape of the surface of the first layer is rectangular, circular, trapezoidal, triangular, square, elliptical, or hexagonal.

10. The optical display system of claim 1, wherein a shape of the surface of the first layer is rectangular, circular, trapezoidal, triangular, square, elliptical, or hexagonal.

11. The optical display system of claim 1, wherein a shape of the surface of the microdisplay is rectangular and a shape of the surface of the first layer is rectangular.

12. The optical display system of claim 1, wherein a shape of the surface of the microdisplay is square and a shape of the surface of the first layer is square.

13. The optical display system of claim 1, wherein the light emitting device is a non-lambertian light emitting device.

14. The optical display system of claim 1, wherein the light emitting device is a photonic lattice light emitting device.

15. The optical display system of claim 1, wherein the surface of the first layer has a dielectric function that varies spatially according to a pattern, and the pattern has an ideal lattice constant and a detuning parameter with a value greater than zero.

16. The optical display system of claim 1, wherein the surface of the first layer has a dielectric function that varies spatially according to a nonperiodic pattern.

17. The optical display system of claim 1, wherein the surface of the first layer has a dielectric function that varies spatially according to a complex periodic pattern.

18. The optical display system of claim 1, wherein the light emitting device is selected from the group consisting of light emitting diodes, lasers, optical amplifiers, and combinations thereof.

19. The optical display system of claim 1, wherein the light emitting device comprises a light emitting diode.

20. The optical display system of claim 1, wherein the light emitting device is selected from the group consisting of OLEDs, flat surface-emitting LEDs, HBLEDs, and combinations thereof.

21. The optical display system of claim 1, wherein a shape of the light emerging from the light emitting device is substantially the same as a shape of the microdisplay.

22. The optical display system of claim 1, further comprising a contact disposed on an area around a perimeter of the surface of the first layer.

23. The optical display system of claim 22, wherein the contact area is matched to an area outside an area imaged on the microdisplay by the light emitting device.

24. The optical display system of claim 1, wherein the ratio of the aspect ratio of the surface of the microdisplay and the aspect ratio of the surface of the first layer is about one.

25. The optical display system of claim 1, wherein the optical display system is configured to be used in a rear projector.

26. The optical display system of claim 1, wherein the optical display system is configured to be used in a rear projection television.

27. The optical display system of claim 1, wherein the optical display system is configured to be used in a front projector.

28. The optical display system of claim 1, wherein the optical display system is configured to be used in a home theatre system.

29. The optical display system of claim 1, wherein the optical display system is configured to be used in a portable projector.

30. The optical display system of claim 4, wherein the microdisplay, the light emitting device and the optical component are positioned so that, during use, an image plane of the system does not coincide with a surface of the microdisplay illuminated by light emitted by the light emitting device.