Method and apparatus for electro-optical color imaging

• US 4,720,706 A
• Filed: 08/26/1985
• Issued: 01/19/1988
• Est. Priority Date: 08/26/1985
• Status: Expired due to Term

• Current Assignee: First KJV Limited Partnership A Maryland Limited Partnership
• Original Assignee: Edward V. Stine
• Inventors: Stine, Edward V.
• Primary Examiner(s): Brigance, Gerald L.
• Application Number:
  US06/769,336
• Time in Patent Office: 876 Days
• Field of Search: 340/752, 340/783, 340/788, 340/700, 340/784, 340/795, 340/766, 350/356, 350/345, 350/347 K, 350/347 E, 350/352, 358/61, 358/75
• US Class Current: 345/84
• CPC Class Codes: G09G 2310/0235 Field-sequential colour display
• CPC Class Codes: G09G 2360/145 the light originating from the display screen
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336

Abstract

Method and apparatus whereby instantly derived emissions of RGB tri-stimulus optical hues are processed into an isotropic field form of radiation for directed transmission through a selected imaging point of an electro-optical imaging screen as a unique point-hue pixel or radiant beam portion of an optical composition being imaged. Embodiments of the invention provide for video or other continuous imaging of contiguous pixels from electrical or optical data source signals. A preferred embodiment of the invention provides for a solid-state flat panel display.

Claims

1. A display device for producing an image comprised of a plurality of pixels, said device comprising:

at least a first and a second light means, each light means for producing in individual response to a video signal visible light radiations having a color different from the other light means;

means for mixing said color radiations;

light screen means for confining said mixed light, said light screen means comprised of a plurality of individually addressable light gates for permitting, when addressed, said mixed color radiations to be emitted; and

means for selectively addressing said light gates in a timed relationship to said video signal such that a composite multi-color display is produced.

2. A device as claimed in claim 1 wherein said mixing means comprises passive optical means for mixing said color radiations.

3. A device as claimed in claim 2 wherein said passive optical means includes transmissive light guide means.

4. A device as claimed in claim 2 wherein said passive optical means produces a substantially isochronously perceived, substantially isotropic field of radiation.

5. A device as claimed in claim 1 wherein said light-gates are binary light-gates so that when addressed, light radiation is emitted and when not addressed substantially no light radiation is emitted.

6. A device as claimed in claim 5 wherein said light screen means comprises a contiguous plurality of said binary light-gates.

7. A device as claimed in claim 6 wherein said light screen means further comprises crossed polarizers, transparent electrode lines, and an electro-optical material.

8. A device as claimed in claim 1 wherein at least one of said first and second light means comprises discrete colored light emitting diodes.

9. A device as claimed in claim 1 wherein at least one of said first and second light means comprises discrete colored lasers.

10. A display device comprising:

a housing having a cavity therein, wherein said cavity is defined by a light impervious surface and said housing further comprising an opening in one portion of said surface, said opening being in communication with said cavity;

a first light means for producing chromatic light radiation of variable intensity in said cavity;

a second light means for producing chromatic light radiation of variable intensity in said cavity that is different from said radiation produced by said first light means;

an optical screen covering said opening and illuminated by said light radiation, said screen comprised of a plurality of individually addressable light gate means for emitting, when addressed, a pixel of chromatic light radiation from said cavity through said screen;

means for providing a video signal to said first and second light means for individually varying the intensity of said light radiation produced by each light means;

means for individually addressing said light gates in a timed relationship to said video signal such that a composite multiple colored display comprised of said pixels of light is produced by said display device; and

means for mixing said chromatic radiations so as to produce a substantially isochroous, substantially isotropic field.

11. A display device as claimed in claim 10 wherein said mixing means comprises passive optical elements.

12. A display device as claimed in claim 11 wherein said passive optical elements include reflector means covering the cavity side of said housing surface for reflecting optical radiation incident thereon, and light dispersive and diffractive means for scattering and mixing said optical emissions.

13. A method for producing an image comprised of a plurality of pixels, said method comprising:

providing a video signal;

producing in response to said video signal visible light radiation from a plurality of light means, each light means producing color emissions different from any other of said light means;

mixing said color radiations within a confining housing comprised of a light screen means having a plurality of individually addressable light gates for permitting, when addressed, said mixed light radiations to be emitted as a pixel of light; and

selectively addressing said light gates in a timed relationship to said video signal such that a composite multi-color display is produced.

14. A method for producing an image as claimed in claim 13 wherein said mixing step produces a substantially isochroous, substantially isotropic field.

15. A method for producing an image as claimed in claim 14 wherein said video signal controls the intensity of the emissions of said light means such that a continuous band of color radiation is produced by varying the emission intensity of said light means.