Spatial Light Modulator Techniques for Stage Lighting

• US 20080106653A1
• Filed: 11/06/2006
• Published: 05/08/2008
• Est. Priority Date: 11/06/2006
• Status: Abandoned Application

• Current Assignee: Production Resource Group LLC
• Original Assignee: Production Resource Group LLC
• Inventors: Harris, Scott C.
• Application Number:
  US11/557,066
• Publication Number:
  US 20080106653A1
• Time in Patent Office: Days
• US Class Current: 348/744
• CPC Class Codes: F21V 14/003 by interposition of elements with electrically controlled variable light transmissivity, e.g. liquid crystal elements or electrochromic devices
• CPC Class Codes: F21W 2131/406 for theatres, stages or film studios
• CPC Class Codes: G03H 1/2294 Addressing the hologram to an active spatial light modulator
• CPC Class Codes: H05B 47/155 Coordinated control of two or more light sources

Abstract

Spatial light modulator techniques for stage lighting. A first technique pieces together multiple spatial light modulator'"'"'s or sectors within an existing spatial light modulator to form an overall area which is closer to being square. For example, to 16×9 spatial light modulators may be located next to one another to form, in effect, a 16×18 spatial light modulator. The same thing can be done within sectors of the spatial light modulator. New forms for the spatial light modulator are also disclosed including a ferroelectric liquid Crystal. The spatial light modulators can receive computer-generated holograms to form three-dimensional representations that are projected from a stage light.

Claims

1. A method, comprising:

obtaining an electronic file representative of a display to be displayed by a stage lighting device;

determining parts of the electronic file which represent parts of the display which are divided along a dividing line, to define divided display parts;

edge blending at least a portion of an edge of at least one of said divided display parts; and

using said divided image parts to control a beam of light to be displayed.

2. A method as in claim 1, wherein said using comprises applying said divided image parts each to a respective spatial light modulator.

3. A method as in claim 1, wherein said using comprises applying said divided image parts to different parts of the same spatial light modulator.

4. A method as in claim 1, wherein said using comprises using said divided image parts to shape an outer perimeter of portions of a stage light beam, and to subsequently combine said portions.

5. A method as in claim 1, wherein said display is a two-dimensional image with a shaped outer perimeter that has a shape that is other than a rectangle.

6. A method as in claim 1, wherein said display represents a three-dimensional image represented by a hologram.

7. A method, comprising:

obtaining an electronic file representative of a three-dimensional display that has an outer perimeter that is other than a rectangle, to be projected by a stage lighting device; and

using said electronic file to drive an element to form the three-dimensional display to be displayed.

8. A method as in claim 7, wherein said element is a pixel level controllable on-off device.

9. A method as in claim 7, wherein said element is a polarization controllable device.

10. A lighting system, comprising:

a control part that receives an electronic file indicative of a display that is to be used to project light, that defines first and second parts indicative of a divided display with a dividing line between the parts of the divided display, and which controls edge blending of at least one of said parts, and produces outputs indicative thereof.

11. A lighting system as in claim 10, further comprising a lamp device, having a power of at least 400 W, producing light along an optical axis, and a spatial light modulator assembly, along said optical axis, driven by said outputs.

12. A lighting system as in claim 11, wherein said spatial light modulator assembly includes first and second spatial light modulators.

13. A system as in claim 12, wherein the divided display is divided substantially in half along a lateral line passing through the entire display.

14. A system as in claim 12, wherein said divided display is divided substantially in thirds along two lateral lines passing through the entire display.

15. A system as in claim 12, wherein there is only a single spatial light modulator, receiving said output.

16. A system as in claim 15, further comprising a light producing part, forming an optical path for light, and wherein said spatial light modulator assembly is located along said optical path.

17. A system as in claim 16, wherein there is only a single spatial light modulator, receiving said divided display in different sections thereof.

18. A system as in claim 16, wherein there are multiple spatial light modulators, each receiving part of the divided display.

19. A system has in claim 16, wherein said spatial light modulator assembly includes pixel level controllable digital devices that can be controlled between on and off states.

20. A system as in claim 19, wherein said spatial light modulators are digital mirror devices.

21. A system as in claim 16, wherein said spatial light modulator assembly includes polarization controllable devices.

22. A system as in claim 21, wherein said spatial light modulator assembly includes a ferroelectric liquid crystal.

23. A system as in claim 12, wherein said display produces a two-dimensional image.

24. A system as in claim 12, wherein said display produces a three-dimensional image.

25. A lighting system, comprising:

a control part that obtains an electronic file indicative of a three-dimensional optical scene and produces a computer-generated hologram based on said three-dimensional optical scene, and produces an electronic output signal indicative of the three-dimensional hologram; and

an interface to a stage lighting device, receiving said electronic output signal and producing an output based thereon.

26. A lighting system as in claim 25, wherein said interface to a stage lighting device produces an optical output based on said output signal.

27. A lighting system as in claim 25, wherein said control part changes an outer perimeter of said hologram to be a shape other than rectangular.