Directional pixel for multiple view display

• US 10,244,230 B2
• Filed: 03/01/2017
• Issued: 03/26/2019
• Est. Priority Date: 03/01/2017
• Status: Active Grant

• Current Assignee: Avalon Holographics Inc.
• Original Assignee: Avalon Holographics Inc.
• Inventors: Haas, Wally, Campbell-Correa, Jennifer, Hamilton, Matthew, Hill, Stephen, Peckham, Jordan, Rumbolt, Chuck
• Primary Examiner(s): Khan, Ibrahim A
• Application Number:
  US15/446,194
• Publication Number:
  US 20180255286A1
• Time in Patent Office: 755 Days
• CPC Class Codes: G02B 2005/1804 Transmission gratings
• CPC Class Codes: G02B 26/08 for controlling the direction of light in light guides G02B6/35
• CPC Class Codes: G02B 30/33 involving directional light or back-light sources
• CPC Class Codes: H04N 13/32 using arrays of controllable light sources; using moving apertures or moving light sources
• CPC Class Codes: H04N 13/324 Colour aspects
• CPC Class Codes: H04N 13/351 for displaying simultaneously
• CPC Class Codes: H04N 13/363 using image projection screens volumetric display H04N13/388
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof
• CPC Class Codes: H04N 2213/001 Constructional or mechanical details
• CPC Class Codes: H10K 50/852 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 59/876 comprising a resonant cavity structure, e.g. Bragg reflector pair

Abstract

The present disclosure relates to a directional pixel for a high-angular resolution, wide field of view, multiple view display. The design teaches a directional pixel comprising a substrate, one or more pixel driving circuits, one or more nano- or micro-scale subpixels, and one or more directional optical guiding surfaces, wherein each of said one or more subpixels is comprised of a light emitting device emitting a light beam and an optical microcavity housing said light emitting device. The optical microcavity is comprised of a plurality of reflective surfaces to specifically manipulate and tune said light beam, wherein one or more of said reflective surfaces is a light propagating reflective surface which propagates said light beam out of said microcavity, and said light propagating reflective surface is connected to said one or more directional optical guiding surfaces to direct said light beam at a specific angle. A high-angular resolution, multiple-view light-field display is created by deploying a plurality of directional pixels into a directional pixel array system.

Claims

1. A directional pixel comprising:

a substrate;

one or more pixel driving circuits;

one or more nano- or micro-scale subpixels; and

one or more directional optical guiding surfaces,

wherein each of said subpixels is comprised of;

a light emitting device emitting a light beam, and

an optical microcavity housing said light emitting device, said optical microcavity comprised of a plurality of reflective surfaces to specifically collimate or reduce the spectral bandwidth of said light beam, wherein one or more of said reflective surfaces is a distributed Bragg reflector, wherein the distributed Bragg reflector and said one or more directional optical guiding surfaces are connected and arranged such that the distributed Bragg reflector propagates said light beam out of said microcavity, and said light propagating reflective surface receives and directs said light beam at a specific angle.

2. The directional pixel of claim 1, wherein said one or more subpixels are individually addressable by said one or more pixel driving circuits.

3. The directional pixel of claim 1, wherein said one or more subpixels are stacked on said one or more pixel driving circuits.

4. The directional pixel of claim 1, wherein each of said one or more pixel driving circuits is dedicated to one of said one or more subpixels.

5. The directional pixel of claim 1, wherein each of said one or more pixel driving circuits is dedicated to a plurality of said one or more subpixels.

6. The directional pixel of claim 1, wherein one or more of said one or more pixel driving circuits is comprised of one or more transistors and one or more capacitors.

7. The directional pixel of claim 1, wherein one or more of said one or more pixel driving circuits is comprised of one or more thin film transistors.

8. The directional pixel of claim 1, wherein said each of said one or more subpixels is a red, green, or blue (RGB) subpixel.

9. The directional pixel of claim 1, wherein said light emitting device is an organic light emitting diode or inorganic light emitting diode.

10. The directional pixel of claim 1, wherein said plurality of reflective surfaces comprises one or more non-conducting surfaces.

11. The directional pixel of claim 1, wherein said one or more directional optical guiding surfaces comprise one or more lenses, one or more lens-like surfaces, or one or more metasurfaces.

12. The directional pixel of claim 1, wherein said one or more directional optical guiding surfaces comprises one or more metasurfaces, wherein said metasurfaces are etched with periodic or non-periodic structures.

13. The directional pixel of claim 1, wherein said one or more directional optical guiding surfaces receives and outputs said light beam as a directional light beam, said one or more directional optical guiding surfaces directing said directional light beam at a specific spatial wave vector.

14. A method for creating a high-angular resolution, multiple-view light-field display, comprising the step of deploying a plurality of directional pixels into a directional pixel array system, one or more of said directional pixels comprising:

a substrate;

one or more pixel driving circuits;

one or more nano- or micro-scale subpixels; and

one or more directional optical guiding surfaces;

wherein each of said subpixels is comprised of a light emitting device emitting a light beam and an optical microcavity housing said light emitting device, said optical microcavity comprised of a plurality of reflective surfaces to specifically collimate or reduce the spectral bandwidth of said light beam, and one or more of said reflective surfaces is a distributed Bragg reflector, and one or more of said reflective surfaces is a light propagating reflective surface which propagates said light beam out of said microcavity, whereby said light propagating reflective surface is connected to said one or more directional optical guiding surfaces to direct said light beam at a specific angle.