US 9,285,591 B1Granted

Compact architecture for near-to-eye display system

AssigneeGoogle Inc.

InventorsAnurag Gupta, Amber M. Luttmann

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Abstract

An eyepiece body of an eyepiece includes an input lens positioned to couple display light into the eyepiece body along a forward propagation path, a concave end reflector disposed at an opposite end of the eyepiece body from the input lens to reflect the display light back along a reverse propagation path, and a viewing region including a partially reflective surface that redirects at least a portion of the display light traveling along the reverse propagation path out of an eye-ward side of the eyepiece body along an emission path. The partially reflective surface is obliquely angled relative to the eye-ward side and the concave end reflector is titled relative to a top or bottom surface of the eyepiece body to collectively cause the emission path of the display light to be oblique to a normal vector of the eye-ward side in two orthogonal dimensions.

Claims20

Dependent claims

An eyepiece, comprising:

an eyepiece body, including:
an input lens positioned to couple display light into the eyepiece body along a forward propagation path;
a concave end reflector disposed at an opposite end of the eyepiece body from the input lens to reflect the display light back along a reverse propagation path within the eyepiece body;
and
a viewing region disposed between the input lens and the concave end reflector and including a partially reflective surface, the partially reflective surface to redirect at least a portion of the display light traveling along the reverse propagation path out of an eye-ward side of the eyepiece body along an emission path,
wherein the partially reflective surface is obliquely angled relative to the eye-ward side and the concave end reflector is titled relative to a top or bottom surface of the eyepiece body to collectively cause the emission path of the display light to be oblique to a first normal vector of the eye-ward side in two orthogonal dimensions,
wherein the input lens is tilted such that a second normal vector from a center point of the input lens is obliquely angled relative to the top or bottom surface of the eyepiece body.

4 more elements

A head wearable display for providing display light to an eye of a user, the head wearable display, comprising:

a display panel for generating display light;
an eyepiece body, including:
an input lens positioned to couple the display light into the eyepiece body along a forward propagation path;
a concave end reflector disposed at an opposite end of the eyepiece body from the input lens to reflect the display light back along a reverse propagation path within the eyepiece body;
and
a viewing region disposed between the input lens and the concave end reflector and including a partially reflective surface, the partially reflective surface to redirect at least a portion of the display light traveling along the reverse propagation path out of an eye-ward side of the eyepiece body along an emission path;
and
a frame assembly to support the eyepiece body and the display panel for wearing on a head of the user with the viewing region positioned above the eye of the user,
wherein the partially reflective surface is obliquely angled relative to the eye-ward side and the concave end reflector is titled relative to a top or bottom surface of the eyepiece body to collectively cause the emission path of the display light to be oblique to a first normal vector of the eye-ward side in two orthogonal dimensions.

6 more elements

Dependencies are inferred from the claim text.