OPTICAL DISPLAY SYSTEMS AND METHODS

• US 20090121657A1
• Filed: 11/04/2008
• Published: 05/14/2009
• Est. Priority Date: 12/12/2003
• Status: Active Grant

• Current Assignee: Luminus Devices Incorporated (Sanan Optoelectronics Company Limited)
• Original Assignee: Luminus Devices Incorporated (Sanan Optoelectronics Company Limited)
• Inventors: Erchak, Alexei A., Lidorikis, Elefterios, Graff, John W.
• Granted Patent: US 7,934,841 B2
• Time in Patent Office: Days
• US Class Current: 315/312
• 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. A method of illuminating a microdisplay using a plurality of light emitting devices, the method comprising:

activating the plurality of light emitting devices so that at least one of the plurality of light emitting devices has an activation time that is different from an activation time of at least one of the other light emitting devices in the plurality of light emitting devices.

2. The method of claim 1, wherein activating the plurality of light emitting devices includes sequentially activating the plurality of light emitting devices.

3. The method of claim 1, wherein an activation time for a given light emitting device is based on an efficiency of the light emitting device.

4. The method of claim 1, wherein at least one of the light emitting devices is an LED.

5. The method of claim 4, wherein the LED is a green LED.

6. The method of claim 1, wherein each of the plurality of light emitting devices is an LED.

7. The method of claim 6, wherein the LED having the longest activation time is a green LED.

8. The method of claim 1, wherein the plurality of light emitting devices includes a red light emitting device, a green light emitting device, and a blue light emitting device.

9. The method of claim 1, wherein at least one of the light emitting devices is a photonic lattice light emitting device.

10. The method of claim 1, wherein a surface of at least one of the plurality of light emitting devices has a surface with a dielectric function that varies spatially according to a pattern, the pattern having an ideal lattice constant and a detuning parameter with a value greater than zero.

11. The method of claim 1, wherein a surface of at least one of the light emitting devices has a dielectric function that varies spatially according to a nonperiodic pattern.

12. The method of claim 1, wherein a surface of at least one of the light emitting devices has a dielectric function that varies spatially according to a complex periodic pattern.

13. The method of claim 1, wherein the activation time of the least efficient light emitting device is at least about 1.25 times the activation time of another of the plurality of light emitting devices.

14. The method of claim 1 further comprising decreasing the refresh rate for the microdisplay.

15. The method of claim 1, further comprising compressing a time to display at least one of the more efficient light emitting devices.

16. The method of claim 15, wherein compressing the time includes increasing the size of the corresponding LED.

17. The method of claim 15, further comprising increasing a rate of data transmission to the microdisplay.

18. The method of claim 17, wherein increasing the rate of data transmission to the microdisplay includes using an interlacing scheme.

19. The method of claim 15, wherein the method includes using a compression algorithm that updates only a difference from a previous image.

20. The method of claim 1, wherein at least one of the light emitting devices is selected from the group consisting of light emitting diodes, lasers, optical amplifiers, and combinations thereof.

21. The method of claim 1, wherein at least one of the light emitting devices is selected from the group consisting of OLEDs, flat surface-emitting LEDs, HBLEDs, and combinations thereof.

22. The method of claim 1, wherein the microdisplay is configured within a front projector.

23. The method of claim 1, wherein the microdisplay is configured within a rear projector.

24. The method of claim 1, wherein the microdisplay is configured within a rear projection television.

25. The method of claim 1, wherein the microdisplay is configured within a home theatre system.

26. The method of claim 1, wherein the microdisplay is configured within a portable projector.