Polarized reflective pinhole mirror display

Patent metadata

Field	Value
Publication number	US-11506898-B1
Application number	US-202017004401-A
Country	US
Kind code	B1
Filing date	Aug 27, 2020
Priority date	Sep 30, 2019
Publication date	Nov 22, 2022
Grant date	Nov 22, 2022

Abstract

A see-through display including a polarized reflective pinhole mirror display. The pinhole mirror display includes a plurality of tiny switchable polarized mirrors. The respective polarized mirrors individually reflect impinging light from an illuminator, and guide the respective portion of light into a pupil of an eye. A reflective optically powered surface reflects light from the illuminator. Each mirror has a first polarization and reflects a portion of light and produces a picture element (pixel) that forms a virtual image seen by the eye of the user. A user may view the reflected virtual image having the first polarization from the illuminator, as well as the image from the real world via a rear substrate that has a second polarization. Although the mirrors are very small, human eyes can still detect the mirrors if they are not polarized. The mirrors and other components are polarized so that the eye can see the real world filtered with the second polarization, but not the mirrors having a different first polarization.

First claim

What is claimed is:

1. Eyewear, comprising:
a frame having a first side and a second side;
an image generator configured to generate light forming an image;
a see-through display supported by the frame, the see-through display having a plurality of mirrors aligned vertically and configured to reflect the light, wherein the plurality of mirrors are configured to reflect a first polarization and transmit a second polarization and wherein the image generator is positioned directly above the plurality of mirrors;
a polarized rear substrate configured to pass light from outside the eyewear at the second polarization that is different than the first polarization;
a front substrate configured to pass both the light having the first polarization that is reflected by the plurality of mirrors and the light from outside the eyewear via the rear substrate having the second polarization; and
a reflector directly opposed the image generator, wherein the light from the image generator is configured to reflect from the front substrate to the reflector and from the reflector to the plurality of mirrors.

2. The eyewear of claim 1 , wherein the see-through display comprises a pinhole mirror display.

3. The eyewear of claim 1 , wherein the image generator is configured to generate the light having a first polarization.

4. The eyewear of claim 1 , wherein the plurality of mirrors comprise polarized beam splitters.

5. The eyewear of claim 4 , wherein the polarized beam splitters comprise wire grid polarizers.

6. The eyewear of claim 1 , wherein the rear substrate comprises a combiner substrate.

7. The eyewear of claim 6 , wherein the rear substrate comprises an absorptive polarizer.

8. The eyewear of claim 1 , wherein the reflector is an optically powered surface.

9. The eyewear of claim 1 , wherein the image generator comprises a display.

10. A method for use with eyewear, the eyewear having a frame, an image generator configured to generate light forming an image, a see-through display supported by the frame, the see-through display having a plurality of mirrors aligned vertically and configured to reflect the light, wherein the plurality of mirrors reflect light of a first polarization and transmit light of a second polarization, where the image generator is positioned directly above the plurality of mirrors, a polarized rear substrate configured to pass light from outside the eyewear at the second polarization that is different than the first polarization, a front substrate configured to pass both the light having the first polarization that is reflected by the plurality of mirrors and the light from outside the eyewear via the polarized rear substrate, and a reflector directly opposed the image generator, wherein the light from the image generator is configured to reflect from the front substrate to the reflector and from the reflector to the plurality of mirrors, comprising:
the image generator generating the light and forming the image;
the reflector reflecting the light from the front substrate;
the plurality of mirrors reflecting the light having the first polarization from the reflector; and
the rear substrate passing light from outside the eyewear at the second polarization that is different from the first polarization.

11. The method of claim 10 , wherein the see-through display comprises a pinhole mirror display.

12. The method of claim 10 , wherein the image generator generates the light having a first polarization.

13. The method of claim 10 , wherein the plurality of mirrors are polarized beam splitters.

14. The method of claim 13 , wherein the polarized beam splitters are wire grid polarizers.

15. The method of claim 10 , wherein the rear substrate comprises a combiner substrate.

16. The method of claim 15 , wherein the rear substrate comprises an absorptive polarizer.

17. The method of claim 10 , wherein the reflector is an optically powered surface.

18. The method of claim 10 , wherein the image generator comprises a display.

19. Eyewear, comprising:
a frame having a first side and a second side;
an image generator configured to generate light forming an image;
a see-through display supported by the frame, the see-through display having a plurality of mirrors configured to reflect the light, wherein the plurality of mirrors are aligned vertically and are configured to reflect a first polarization and transmit a second polarization;
where the image generator is positioned directly above the plurality of mirrors and is configured to direct the generated light directly through an optically powered element to the plurality of mirrors;
a polarized rear substrate configured to pass light from outside the eyewear at the second polarization that is different than the first polarization; and
a front substrate configured to pass both the light having the first polarization that is reflected by the plurality of mirrors and the light from outside the eyewear via the rear substrate having the second polarization.

Assignees

• Kubala Kenneth
• Patton Russell Douglas
• Rodriguez Ii Jonathan M
• Snap Inc

Inventors

• Kubala Kenneth
• Patton Russell Douglas
• Rodriguez Ii Jonathan M

Classifications

• G02B27/285

  comprising arrays of elements, e.g. microprisms · CPC title

• G02B27/143

  using macroscopically faceted or segmented reflective surfaces · CPC title

• G02B17/006

  Systems in which light light is reflected on a plurality of parallel surfaces, e.g. louvre mirrors, total internal reflection [TIR] lenses (Fresnel mirrors G02B5/09, Fresnel lenses G02B3/08) · CPC title

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G02B27/0172 Primary

  characterised by optical features · CPC title