See-through near-eye display glasses with a small scale image source

Patent metadata

Field	Value
Publication number	US-9341843-B2
Application number	US-201213429599-A
Country	US
Kind code	B2
Filing date	Mar 26, 2012
Priority date	Feb 28, 2010
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

An interactive head-mounted eyepiece with an integrated processor for handling content for display and an integrated image source for introducing the content to an optical assembly through which the user views a surrounding environment and the displayed content, wherein the height of the image source is at least 80% of a display active area width of the optical assembly.

First claim

What is claimed is:

1. A head-mounted display device comprising:
an integrated processor for handling virtual content for display;
an integrated image source for introducing the virtual content, the integrated image source including:
a reflective pixel array of individually addressable pixels, the reflective pixel array configured to form a virtual display image based on the virtual content,
a light source configured to illuminate the pixel array, and
a polarization-sensitive surface configured to receive illumination from the light source, to reflect the illumination onto the pixel array, and to transmit the image formed by the pixel array, the polarization-sensitive surface opposing the pixel array and curving away from the pixel array by more than half a width of the pixel array; and

a beam-splitting assembly configured to receive the virtual display image transmitted through the polarization-sensitive surface and to redirect the virtual display image to a viewing location, in combination with external imagery.

2. The device of claim 1 wherein the reflective pixel array is a liquid crystal on silicon array.

3. The device of claim 1 wherein the polarization-sensitive surface retreats along a direction normal to the pixel array by more than half the width of the pixel array.

4. The device of claim 3 wherein the integrated image source further includes an absorptive polarizer configured to receive the illumination from the light source and to convert the illumination to an S-polarization state.

5. The device of claim 4 wherein the light source is unpolarized, and wherein the absorptive prepolarizer is optically intermediate the light source and the polarization-sensitive surface.

6. The device of claim 3 wherein the integrated image source further includes an anti-reflective coating arranged on one or more of a polarizer, a retarding film, or a partially reflective mirror of the image source.

7. The device of claim 3 wherein the integrated image source further comprises a diffuser adjacent the light source and configured to receive and diffusively transmit the illumination from the light source toward the polarization-sensitive surface before encountering the polarization-sensitive surface.

8. The device of claim 3 wherein the integrated image source further comprises a half-wave film adjacent the polarization-sensitive surface on a side of the surface opposite the reflective pixel array, and wherein the half-wave film is configured to transmit the virtual display image to the beam-splitting assembly.

9. The device of claim 8 wherein curvature of the polarization-sensitive surface determines width of an illuminated area on the pixel array, and wherein tilt of the curvature determines positioning of the illuminated area.

10. The device of claim 9 wherein the curvature is configured to spread light striking the polarization-sensitive surface and to fold the light to uniformly illuminate the pixel array.

11. The device of claim 8 wherein a height of the integrated image source is at least 80% of the width of the pixel array.

12. The device of claim 1 wherein the light source includes a light-emitting diode.

13. The device of claim 1 wherein the polarization-sensitive surface includes a polarization film.

14. The device of claim 1 wherein the polarization-sensitive surface includes a curved wire-grid polarizer.

15. A head-mounted display device comprising:
an integrated processor for handling virtual content for display;
a reflective pixel array of individually addressable pixels, the reflective image array configured to form a virtual display image based on the virtual content;
a light source configured to illuminate the pixel array;
a polarization-sensitive surface configured to receive illumination from the light source, to reflect the illumination onto the pixel array, and to transmit the image formed by the pixel array, the polarization-sensitive surface opposing the pixel array and curving away from the pixel array by more than half a width of the pixel array; and
a beam splitter positioned obliquely in front of a viewing location, the beam splitter configured to receive the virtual display image transmitted through the polarization-sensitive surface and to redirect the virtual display image away from the viewing location; and
a partially reflective focusing mirror arranged between the beam splitter and external imagery, the focusing mirror configured to receive the virtual display image reflected off the beam splitter and to reflect a portion of the virtual display image, with changed polarization state, back through the beam splitter and into the viewing location, in combination with external imagery transmitted through the focusing mirror and the beam splitter.

16. The device of claim 15 further comprising a quarter-wave film arranged between the beam splitter and the partially-reflective focusing mirror.

17. The device of claim 15 further comprising a light-control element arranged in front of the partially reflective focusing mirror, wherein the light-control element is configured to reduce eyeglow and escaping portions of the virtual display image.

18. The device of claim 17 wherein the light-control element includes a reflective linear polarizer and a quarter wave film arranged in parallel.

19. The device of claim 17 wherein the light-control element includes a controllable darkening layer configured to controllably reduce brightness of the external imagery received into the viewing location.

20. A head-mounted display device comprising:
an integrated processor for handling virtual content for display;
a reflective pixel array of individually addressable pixels, the reflective pixel array configured to form a virtual display image based on the virtual content;
a light source configured to illuminate the pixel array;
a polarization-sensitive surface configured to receive illumination from the light source, to reflect the illumination onto the pixel array, and to transmit the image formed by the pixel array, the polarization-sensitive surface opposing the pixel array and curving away from the pixel array by more than half a width of the pixel array; and
a beam-splitting assembly configured to receive the virtual display image transmitted through the polarization-sensitive surface and to redirect the virtual display image to a viewing location, in combination with external imagery transmitted directly into the viewing location along an optical axis, the virtual display image received at less than 80 degrees from the optical axis.

Assignees

• Border John N
• Haddick John D
• Osterhout Ralph F
• Microsoft Technology Licensing Llc

Inventors

• Border John N
• Haddick John D
• Osterhout Ralph F

Classifications

• G06F3/005

  Input arrangements through a video camera · CPC title

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G06F3/017

  Gesture based interaction, e.g. based on a set of recognized hand gestures (interaction based on gestures traced on a digitiser G06F3/04883) · CPC title

• G02B2027/014

  comprising information/image processing systems · CPC title

• G06F1/163

  Wearable computers, e.g. on a belt · CPC title