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Retroreflective light field display

  • US 10,404,975 B2
  • Filed: 03/18/2016
  • Issued: 09/03/2019
  • Est. Priority Date: 03/20/2015
  • Status: Active Grant
First Claim
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1. A projected head mounted display system comprising:

  • a head mounted frame including at least one image projector arranged to project images out of and forward away from, said frame, said projector or projectors having an adjustable projected focal plane distance;

    at least one controller to vary the focal plane distance of an image scene in a sequence selected to simulate a light field for projected images reflected back from a retroreflective screen or retroreflective surface; and

    a retroreflective screen or retroreflective surface having an effectively high ratio of retroreflected rays to diffused reflected rays so as to return to the eyes of the wearer of said projected head mounted display system, said projected images from said forward projecting image projector or projectors over said adjustable focal plane distance range of said image scene;

    wherein said head mounted display further comprises a tracking module to track the movement and position of a user and provide tracking data to a computing element to produce computer generated images (CGI) of objects having positions or perceived focal plane distances aligned with one or more real objects in view of the user;

    wherein each of said at least one image projectors comprises an electrically adjustable optical element to modulate the focal plane distances through a sequence that matches the visual distances of the generated image to the user at a rate sufficient to merge images in the visual perception of the user to simulate a light field.

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