Virtual retinal display

• US 6,008,781 A
• Filed: 08/13/1997
• Issued: 12/28/1999
• Est. Priority Date: 10/22/1992
• Status: Expired due to Fees

• Current Assignee: Board of Regents of The University of Washington (University of Washington)
• Original Assignee: Board of Regents of The University of Washington (University of Washington)
• Inventors: Kollin, Joel S., Furness, Thomas Adrian III
• Primary Examiner(s): BRIER, JEFFERY A
• Application Number:
  US08/911,989
• Time in Patent Office: 867 Days
• Field of Search: 345/7-9, 348/53, 340/980, 359/630, 359/631
• US Class Current: 345/8
• 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 2027/0132 comprising binocular systems
• CPC Class Codes: G02B 2027/0138 comprising image capture systems, e.g. camera
• CPC Class Codes: G02B 2027/0187 slaved to motion of at least a part of the body of the user, e.g. head, eye
• CPC Class Codes: G02B 2027/0198 System for aligning or maintaining alignment of an image in a predetermined direction
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/02 by tracing or scanning a light beam on a screen
• CPC Class Codes: G09G 3/025 with scanning or deflecting the beams in two directions or dimensions
• CPC Class Codes: H04N 9/3129 scanning a light beam on the display screen scanning a light beam on a screen in displays other than projection devices G09G3/02; scanning systems in general G02B26/10; projectors using laser light sources in general H04N9/3161

Abstract

A virtual retinal display utilizes photon generation and manipulation to create a panoramic, high resolution, color virtual image that is projected directly onto the retina of the eye without creating a real or an aerial image that is viewed via a mirror or optics. The virtual retinal display includes a source of photons, the photons being modulated with video information and scanned in a raster type of pattern directly onto the retina of the user'"'"'s eye. The photon generator may utilize coherent or non-coherent light. Further, the photon generator may utilize color light generators so as to scan a colored virtual image directly onto the retina of the user'"'"'s eye. The virtual retinal display may also include a depth accommodation cue to vary the focus of scanned photons rapidly so as to control the depth perceived by a user for each individual picture element of the virtual image. Further, an eye tracking system may be utilized to sense the position of an entrance pupil of the user'"'"'s eye, the detected pupil position being utilized to move the scanned photons so as to be approximately coincident with the entrance pupil of the eye. The detected pupil position may also be used to change the video image scanned onto the retina so that as the user'"'"'s eye moves, the view perceived by the user changes.

Claims

1. An apparatus for displaying an image directly on the retina of an eye comprising:

a light source;

a source of video signals;

an optical modulator for modulating light from said light source with a video signal form said video signal source;

a scanner system for horizontally and vertically scanning the video modulated light;

a depth signal generator;

a variable focus optical element responsive to said depth signal to vary the focus of the scanned light; and

optics for projecting said scanned light onto an eye of a user.