See-through computer display systems

• US 9,720,234 B2
• Filed: 03/25/2015
• Issued: 08/01/2017
• Est. Priority Date: 01/21/2014
• Status: Active Grant

• Current Assignee: Mentor Acquisition One, LLC (Magic Leap, Inc.)
• Original Assignee: Osterhout Design Group
• Inventors: Haddick, John D., Bietry, Joseph, Border, John N.
• Primary Examiner(s): Hasan, Mohammed
• Assistant Examiner(s): Abdur, Rahman
• Application Number:
  US14/668,122
• Publication Number:
  US 20150309313A1
• Time in Patent Office: 860 Days
• Field of Search: 359237, 359245, 359443, 359449, 359451, 359618, 359629, 359630, 359631, 359831, 359833, 359834, 359893, 345 7- 9, 345 30, 345 32, 345 48- 55, 2410, 2 5, 2 61, 2 63, 2 66, 2 67, 2426, 2 15, 2 10, 2422, 2427, 2429-454, 353 30, 353 31, 353 33, 353 74, 353 77, 353 78, 353 98, 353 99, 353119
• CPC Class Codes: B32B 2037/1253 curable adhesive
• CPC Class Codes: B32B 2307/416 Reflective
• CPC Class Codes: B32B 2307/42 Polarizing, birefringent, filtering
• CPC Class Codes: B32B 2551/00 Optical elements
• CPC Class Codes: B32B 2551/08 Mirrors
• CPC Class Codes: B32B 37/1284 Application of adhesive
• CPC Class Codes: B32B 37/24 with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate B32B37/15 takes precedence
• CPC Class Codes: B32B 38/0008 Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation heat treatment B32B38/0036
• CPC Class Codes: G02B 2027/0116 comprising devices for correcting chromatic aberration
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 2027/0138 comprising image capture systems, e.g. camera
• CPC Class Codes: G02B 2027/0174 holographic
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 27/0093 with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 27/142 Coating structures, e.g. thin films multilayers
• CPC Class Codes: G02B 27/286 for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another G02B5/3083 takes precedence; light guide coupling means utilising polarising elements G02B6/34
• CPC Class Codes: G02B 5/04 Prisms
• CPC Class Codes: G02B 5/30 Polarising elements light-modulating devices with active elements G02F1/00
• CPC Class Codes: G02B 6/0001 specially adapted for lighting devices or systems lighting or signalling on vehicles using light guides B60Q1/00; lighting devices for vehicle dashboards B60Q3/10; lighting devices for vehicle interior using light guides B60Q3/62; lighting devices mounted on the vehicle rear part using light guides F21S43/235; measuring arrangements having light conducting pointers G01D13/265; illumination of liquid crystal displays G02F1/1336; illuminated signs G09F13/00
• CPC Class Codes: G02F 1/133602 : Direct backlight
• CPC Class Codes: G06F 3/013 : Eye tracking input arrangements G06F3/015 takes precedence
• CPC Class Codes: G06F 3/017 : Gesture based interaction, e.g. based on a set of recognized hand gestures interaction based on gestures traced on a digitiser G06F3/04883
• CPC Class Codes: G06T 19/006 : Mixed reality object pose determination, tracking or camera calibration for mixed reality G06T7/00
• CPC Class Codes: G06V 20/20 : in augmented reality scenes
• CPC Class Codes: G06V 40/19 : Sensors therefor
• CPC Class Codes: H04N 23/11 : for generating image signals from visible and infrared light wavelengths

Abstract

A head worn display for displaying a displayed image overlaid onto a see-through view of a surrounding environment that includes multiply folded optics, includes a solid prism with at least one optically powered surface and a planar surface that provides a first internal fold of an optical axis of an image light associated with the displayed image, a combiner that provides a second fold the optical axis associated with the image light and wherein a flat plate reflector is bonded to the planar surface of the solid prism to provide a flat reflective surface to the solid prism.

Claims

1. A head worn display for displaying a displayed image overlaid onto a see-through view of a surrounding environment that includes multiply folded optics, comprising:

a solid prism with a concave image light input optically powered surface, a concave image light output optically powered surface, and a planar surface that provides an internal fold of an optical axis of an image light associated with the displayed image, wherein an image source projects image light into the input power surface towards the planar surface, and wherein the image light transmits through the output power surface;

a combiner that provides a second fold the optical axis associated with the image light, wherein the combiner combines the displayed image and light from the surrounding environment; and

wherein a flat plate reflector is bonded to the planar surface of the solid prism to provide an optically flat reflective surface to the solid prism, wherein the image light reflects off the flat reflector plate directly towards the output power surface.

2. The head-worn display of claim 1 wherein the combiner is a flat partially reflective mirror.

3. The head-worn display of claim 1 wherein the multiply folded optics further include a self-luminous image source or a backlit display that provides the image light and the flat plate reflector is a full mirror.

4. The head-worn display of claim 1 wherein the multiply folded optics further include a reflective image source and illuminating light is provided by a backlight positioned behind the flat plate reflector, wherein the flat plate reflector is a partially reflective mirror and the illuminating light is transmitted through the flat plate reflector.

5. The head-worn display of claim 1 wherein the flat plate reflector is bonded to the planar surface of the solid prism with a UV curing transparent adhesive that is index matched to the solid prism.

6. The head-worn display of claim 5 wherein the adhesive fills a sink mark on the planar surface.

7. The head-worn display of claim 5 wherein the refractive index of the UV curing transparent adhesive is within +/−

0.05 of the refractive index of the solid prism.