Active display system

• US 20030193485A1
• Filed: 04/10/2002
• Published: 10/16/2003
• Est. Priority Date: 04/10/2002
• Status: Abandoned Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Allen, William J., da Cunha, John M.
• Application Number:
  US10/120,945
• Publication Number:
  US 20030193485A1
• Time in Patent Office: Days
• US Class Current: 345/204
• CPC Class Codes: G09G 2360/142 the light being detected by light detection means within each pixel
• CPC Class Codes: G09G 3/002 to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
• CPC Class Codes: G09G 3/02 by tracing or scanning a light beam on a screen
• 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 system for displaying images on an active display is provided. The system includes an image information source configured to project optical image information, a plurality of display elements, and a plurality of receiving elements associated with the display elements, the plurality of receiving elements being configured to receive the image information from the image information source and further configured to activate the associated display elements according to the image information.

Claims

1. An active display system comprising:

an image information source configured to project optical image information onto a display;

a plurality of display elements; and

a plurality of receiving elements associated with the display elements, the receiving elements being configured to receive the optical image information from the image information source and being further configured to activate the associated display elements according to the optical image information.

2. The active display system of claim 1, wherein the display elements are cooperatively arranged on the display to produce a color image.

3. The active display system of claim 1, wherein each display element produces light within the visible-light spectrum.

4. The active display system of claim 1, wherein the image information source is a laser adapted to communicate optical image information to the receiving elements.

5. The active display system of claim 4, wherein the laser is configured to produce a laser beam which scans the display.

6. The active display system of claim 5, wherein the laser is configured to modulate the laser beam in accordance with the optical image information as the laser beam scans the display to selectively stimulate receiving elements on the display, thereby activating and deactivating associated display elements in accordance with the optical image information.

7. The active display system of claim 1, wherein the image information source is further configured to direct at least a first wavelength of light and a second wavelength of light onto the display, wherein a first set of receiving elements are stimulated by the first wavelength of light and a second set of receiving elements are stimulated by the second wavelength of light.

8. The active display system of claim 7, wherein at least one of the first wavelength of light and the second wavelength of light are invisible.

9. The active display system of claim 7, wherein the image information source is configured to direct the first wavelength of light and the second wavelength of light onto the display successively.

10. A method for displaying images on a screen, the method comprising:

providing a plurality of receiving elements and display elements on a screen, each display element being associated with at least one receiving element;

providing an image information source configured to project optical image information onto the receiving elements;

directing projection of optical image information from the image information source to the receiving elements to selectively stimulate the receiving elements based on the optical image information; and

directing activation of display elements corresponding to the stimulated receiving elements in accordance with the optical image information to produce an image.

11. The method of claim 10, wherein directing projection of optical image information includes directing a modulated light beam onto the screen.

12. The method of claim 11, wherein directing projection of optical image information further includes scanning the screen with the modulated light beam.

13. The method of claim 10, wherein directing projection of optical image information includes selectively projecting a plurality of different wavelengths of light onto the screen, the different wavelengths of light being effective to stimulate different sets of receiving elements.

14. A display system comprising:

a display screen having a plurality of receivers and a plurality of emitters, wherein each emitter is associated with at least one receiver; and

a laser configured to produce a beam modulated in accordance with image information, wherein the laser is configured to scan the display and selectively stimulate the receivers in accordance with such image information, thereby activating corresponding emitters to produce an image on the display screen.

15. The system of claim 14, wherein the emitters emit differing colors of visible light and are cooperatively arranged to produce a color image.

16. The system of claim 14, wherein the receiver is a receiving phototransistor.

17. The system of claim 14, wherein the laser is configured to raster-scan the display.

18. The system of claim 17, wherein the laser is configured to selectively pulse the beam in accordance with the image information as it scans the display to selectively activate emitters in accordance with the image information.

19. An optically addressed display system comprising:

a display screen including a plurality of light emitters, wherein each light emitter is associated with a light receiver; and

a projector configured to selectively direct activating light onto the light receivers;

wherein a first group of light emitters are configured to emit light upon associated light receivers receiving activating light of a first wavelength and a second group of light emitters are configured to emit light upon associated light receivers receiving activating light of a second wavelength, different from the first wavelength.

20. The system of claim 19, wherein the first group of light emitters are configured to selectively emit light of a first color, and the second group of light emitters are configured to selectively emit light of a second color, different from the first color.

21. The system of claim 19, wherein the first wavelength of light is within a non-visible part of a light spectrum.

22. The system of claim 19, wherein the projector includes a wavelength separator configured to separate light from an illumination source into the first wavelength of light and the second wavelength of light, and for successive direction of such first wavelength of light and second wavelength of light onto the light receivers.

23. The system of claim 19, wherein the projector includes a spatial light modulator configured to direct the first wavelength of light and the second wavelength of light onto the light receivers.

24. The system of claim 19, wherein a third group of light emitters are configured to emit light upon associated light receivers receiving activating light of a third different wavelength of light, and wherein the first group of light emitters emit red light, the second group of light emitters emit green light, and the third group of light emitters emit blue light.

25. A method of optically addressing a display, the method comprising:

providing a screen having a plurality of color components, wherein each color component is coupled with at least one receiver;

scanning a laser beam across the screen to selectively stimulate receivers on the screen; and

activating corresponding color components on the screen to generate an image.

26. The method of claim 25, further including aligning the laser beam to avoid simultaneous stimulation of multiple receivers.

27. The method of claim 25, further including modulating the laser beam to selectively stimulate individual receivers.

28. The method of claim 25, wherein scanning a laser beam across the screen includes sequentially scanning rows of receivers on the screen.

29. The method of claim 25, wherein scanning a laser beam across the screen includes sequentially scanning columns of receivers on the screen.

30. A method for optically addressing an active display, the method comprising:

providing a display having a plurality of display elements, including a first set of display elements coupled with a first set of receiving elements, a second set of display elements coupled with a second set of receiving elements, and a third set of display elements coupled with a third set of receiving elements;

producing a plurality of different wavelengths of light, including a first wavelength of light, a second wavelength of light, and a third wavelength of light;

directing the plurality of wavelengths of light onto the display;

selectively modulating the first wavelength of light to effect selected stimulation of the first set of receiving elements;

activating display elements of the first set of display elements upon stimulation of corresponding first receiving elements by the first wavelength of light;

selectively modulating the second wavelength of light to effect selected stimulation of the second set of receiving elements;

activating display elements of the second set of display elements upon stimulation of corresponding second receiving elements by the second wavelength of light;

selectively modulating the third wavelength of light to effect selected stimulation of the third set of receiving elements; and

activating display elements of the third set of display elements upon stimulation of corresponding third receiving elements by the third wavelength of light.

31. The method of claim 30, wherein directing the plurality of wavelengths of light onto the display includes successively directing the first wavelength of light, the second wavelength of light, and the third wavelength of light onto the display.

32. The method of claim 30, wherein directing the plurality of wavelengths of light onto the display occurs simultaneously.

33. A projection device comprising:

an active display screen having a plurality of display elements, wherein each display element includes an emitter associated with a receiver; and

a projector configured to project optical image information onto the receivers of the display screen;

wherein the emitters are selectively activated when the associated receiver receives corresponding optical image information from the projector.

34. A display system comprising:

display means having a plurality of light controllers, each light controller being coupled with a receiver;

projecting means for projecting image information onto the display means, the projecting means being configured for selected stimulation of receivers in accordance with the image information; and

activating means for activating the light controllers associated with the stimulated receivers to generate an image.