Eyepiece for head wearable display using partial and total internal reflections
First Claim
1. An eyepiece for a head wearable display, the eyepiece comprising:
- a light guide component for guiding display light received at a peripheral location offset from a viewing region and emitting the display light along an eye-ward direction in the viewing region, the light guide component including;
an input surface oriented to receive the display light into the light guide component at the peripheral location;
an eye-ward facing side having a first curvature;
a world facing side having a second curvature different from the first curvature;
a total internal reflection (“
TIR”
) portion disposed proximal to the input surface to guide the display light received through in the input surface using TIR off of the eye-ward and world facing sides; and
a partially reflective portion disposed distal to the input surface to receive the display light from the TIR portion and guide the display light to the viewing region using partial reflections off of the eye-ward and world facing sides,wherein the first and second curvatures of the eye-ward and world facing sides together operate to adjust the vergence of the display light via successive reflections between the eye-ward and world facing sides to virtually displace an image of the display light emitted,wherein an optical path of a single ray of the display light within the light guide component includes two or more TIR reflections within the TIR portion and four or more partial reflections within the partially reflective portion.
2 Assignments
0 Petitions
Accused Products
Abstract
An eyepiece for a head wearable display includes a light guide component for guiding display light received at a peripheral location offset from a viewing region and emitting the display light in the viewing region. The light guide component includes an input surface oriented to receive the display light into the light guide component, an eye-ward facing side having a first curvature, a world facing side having a second curvature, a total internal reflection (“TIR”) portion disposed proximal to the input surface to guide the display light using TIR, and a partially reflective portion disposed distal to the input surface to receive the display light from the TIR portion and guide the display light to the viewing region using partial reflections. The first and second curvatures of the eye-ward and world facing sides together operate to adjust the vergence of the display light to virtually displace an image.
147 Citations
20 Claims
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1. An eyepiece for a head wearable display, the eyepiece comprising:
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a light guide component for guiding display light received at a peripheral location offset from a viewing region and emitting the display light along an eye-ward direction in the viewing region, the light guide component including; an input surface oriented to receive the display light into the light guide component at the peripheral location; an eye-ward facing side having a first curvature; a world facing side having a second curvature different from the first curvature; a total internal reflection (“
TIR”
) portion disposed proximal to the input surface to guide the display light received through in the input surface using TIR off of the eye-ward and world facing sides; anda partially reflective portion disposed distal to the input surface to receive the display light from the TIR portion and guide the display light to the viewing region using partial reflections off of the eye-ward and world facing sides, wherein the first and second curvatures of the eye-ward and world facing sides together operate to adjust the vergence of the display light via successive reflections between the eye-ward and world facing sides to virtually displace an image of the display light emitted, wherein an optical path of a single ray of the display light within the light guide component includes two or more TIR reflections within the TIR portion and four or more partial reflections within the partially reflective portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A head wearable display for displaying an image to a user, the head wearable display comprising:
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a display source to generate display light; an eyepiece to guide light, the eyepiece including; an input surface oriented to receive the display light into the light guide component at a peripheral location offset from a viewing region of the eyepiece; an eye-ward facing side having a first curvature; a world facing side having a second curvature different from the first curvature; a total internal reflection (“
TIR”
) portion disposed proximal to the input surface to guide the display light received through in the input surface using TIR off of the eye-ward and world facing sides; anda partially reflective portion disposed distal to the input surface to receive the display light from the TIR portion and guide the display light to the viewing region using partial reflections off of the eye-ward and world facing sides, wherein an optical path of a single ray of the display light within the eyepiece includes two or more TIR reflections within the TIR portion and four or more partial reflections within the partially reflective portion; and a frame assembly to support the eyepiece and the display source for wearing on a head of the user with the viewing region positioned in front of the eye of the user. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification