LIGHTGUIDE WITH MULTIPLE IN-COUPLING HOLOGRAMS FOR HEAD WEARABLE DISPLAY
First Claim
1. An optical apparatus for a head wearable display, the optical apparatus comprising:
- a lightguide including;
a first side surface;
a second side surface;
an in-coupling region for receiving display light into the lightguide through the first side surface;
an out-coupling region for emitting the display light out of the lightguide; and
a relay region for guiding a path of the display light between the first and second side surfaces from the in-coupling region to the out-coupling region;
a first in-coupling hologram disposed proximate to the first side surface at the in-coupling region to redirect the path of the display light by a first angle;
a second in-coupling hologram disposed across from the first in-coupling hologram proximate to the second side surface at the in-coupling region to redirect the path of the display light by a second angle such that the path of the display light enters a total internal reflection (“
TIR”
) condition in the relay region after redirection by the first and second in-coupling holograms; and
an out-coupling optical element disposed at the out-coupling region to redirect the display light out of the lightguide.
2 Assignments
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Accused Products
Abstract
An optical apparatus for a head wearable display includes a lightguide, in-coupling holograms, and an out-coupling optical element. The lightguide includes an in-coupling region for receiving display light into the lightguide, an out-coupling region for emitting the display light out of the lightguide, and a relay region for guiding a path of the display light from the in-coupling region to the out-coupling region. A first of the in-coupling holograms is disposed at the in-coupling region to redirect the path of the display light by a first angle. A second of the in-coupling holograms is disposed across from the first in-coupling hologram at the in-coupling region to redirect the path of the display light by a second angle such that the path of the display light enters a total internal reflection condition in the relay region after redirection by the first and second in-coupling holograms.
153 Citations
23 Claims
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1. An optical apparatus for a head wearable display, the optical apparatus comprising:
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a lightguide including; a first side surface; a second side surface; an in-coupling region for receiving display light into the lightguide through the first side surface; an out-coupling region for emitting the display light out of the lightguide; and a relay region for guiding a path of the display light between the first and second side surfaces from the in-coupling region to the out-coupling region; a first in-coupling hologram disposed proximate to the first side surface at the in-coupling region to redirect the path of the display light by a first angle; a second in-coupling hologram disposed across from the first in-coupling hologram proximate to the second side surface at the in-coupling region to redirect the path of the display light by a second angle such that the path of the display light enters a total internal reflection (“
TIR”
) condition in the relay region after redirection by the first and second in-coupling holograms; andan out-coupling optical element disposed at the out-coupling region to redirect the display light out of the lightguide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A head wearable display, comprising:
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a display source to generate display light; an eyepiece including; a lightguide including an in-coupling region for receiving the display light into the lightguide, an out-coupling region for emitting the display light out of the lightguide, and a relay region for internally guiding a path of the display light from the in-coupling region to the out-coupling region; a first in-coupling hologram disposed at the in-coupling region to redirect the path of the display light by a first angle; and a second in-coupling hologram disposed across from the first in-coupling hologram at the in-coupling region to redirect the path of the display light by a second angle such that the path of the display light enters a total internal reflection (“
TIR”
) condition in the relay region after redirection by the first and second in-coupling holograms; anda frame assembly to support the display source and the eyepiece for wearing on a head of a user with the out-coupling region of the lightguide aligned in front of an eye of the user. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification