Google Patent | Near-eye Display With Extended Effective Eyebox Via Eye Tracking

Patent: Near-eye Display With Extended Effective Eyebox Via Eye Tracking

Publication Number: 20180330652

Publication Date: 2018-11-15

Applicants: Google Inc.

Abstract

A near-eye display system includes a display panel to display a near-eye lightfield frame comprising an array of elemental images and an eye tracking component to track a pose of a user’s eye. The system further includes a rendering component to position the array of elemental images within the near-eye lightfield frame based on the pose of the user’s eye. A method of operation of the near-eye display system includes determining, using the eye tracking component, a first pose of the user’s eye and determining a shift vector for an array of elemental images forming a near-eye lightfield frame based on the first pose of the user’s eye. The method further includes rendering the array of elemental images at a position within the near-eye lightfield frame that is based on the shift vector.

BACKGROUND 

Field of the Disclosure

The present disclosure relates generally to near-eye displays and, more particularly, to improvement of effective eye-box size in near-eye displays.

Description of the Related Art

Head-mounted displays (HMDs) and other near-eye display systems can utilize a near-eye lightfield display or other computational display to provide effective display of three-dimensional (3D) graphics. Generally, the near-eye lightfield display employs one or more display panels and an array of lenslets, pinholes, or other optic features that overlie the one or more display panels. A rendering system renders an array of elemental images, with each elemental image representing an image or view of an object or scene from a corresponding perspective or virtual camera position. Such near-eye lightfield displays typically exhibit a tradeoff between eyebox size and field of view (FOV) as eyebox size is proportional to the ratio of eye relief to lenslet focal length. Thus, to provide satisfactory FOV, a conventional near-eye display system employing an near-eye lightfield display typically has a relatively limited eyebox, which often is problematic in view of the variability of inter-pupillary distance (IPD) among the population of potential users and the variability in accurate positioning of a user’s eye relative to the display, either of which can result in a user’s pupil falling outside of the boundaries of the eyebox and thus resulting in occlusion of at least a portion of the imagery intended to be displayed to the user’s eye.

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