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Increasing effective eyebox size of an HMD

  • US 9,116,337 B1
  • Filed: 03/21/2012
  • Issued: 08/25/2015
  • Est. Priority Date: 03/21/2012
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • an image source to generate display light;

    light bending optics to deliver the display light from the image source to a near-to-eye emission surface for emitting the display light to an eye of a user within an eyebox;

    an eye tracking camera system for acquiring an image of the eye for tracking movement of the eye;

    an eyebox actuator for adjusting a lateral position of the eyebox; and

    a controller coupled to the eye tracking camera system to receive image data and to determine a location of the eye based on the image data, the controller coupled to the eyebox actuator to control the eyebox actuator to dynamically adjust the lateral position of the eyebox to follow the movement of the eye in real-time such that the eyebox moves laterally when the eye looks left or right to dynamically extend an effective size of the eyebox from which the eye can view the display light,wherein the light bending optics comprise;

    a light relay optically coupled to the image source to receive the display light at a first end; and

    an adjustable end reflector disposed at an opposite end of the light relay from the first end coupled to the image source, the adjustable end reflector coupled to receive the display light along a forward propagating path and reflect the display light along a reverse propagating path, wherein the adjustable end reflector is coupled to the eyebox actuator to adjust an angle of the reverse propagating path responsive to the controller.

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