Wearable pupil-forming display apparatus
A wearable display apparatus is described herein. The wearable display apparatus includes a headset, a left-eye optical system, a right-eye optical system, and an inter-pupil distance (IPD) adjustment system coupled to the headset, the left-eye optical system, and the right-eye optical system for adjusting an inter-pupil spacing between the left-eye optical system and the right-eye optical system.
1. An augmented/extended reality (AXR) wearable display apparatus to be worn by a viewer, comprising:
a headset support frame;
one or more front facing cameras mounted to the headset support frame;
an eye-tracking system configured to provide a signal indicating a pupil position of the viewer;
an optical system including a left-eye optical module and a right-eye optical module, each optical module including an image generator, a partially transmissive curved mirror positioned in front of a viewer eye, and an optical image relay configured to conjugate a two-dimensional (2D) image formed from the image generator to a curved focal surface of the partially transmissive curved mirror and including a prism having a folding surface extending between an input surface and output surface and configured for folding the optical path for light generated by the image generator, and an aperture stop for the optical image relay is formed within the prism;
an inter-pupil distance (IPD) adjustment system including:
a stationary center support mounted to the headset support frame;
a left transport apparatus slideably mounted to the stationary center support and coupled to the left-eye optical module for supporting the left-eye optical module from the stationary center support;
a right transport apparatus slideably mounted to the stationary center support and coupled to the right-eye optical module for supporting the right-eye optical module from the stationary center support;
and
an actuator configured to selectively move the left transport apparatus and the right transport apparatus along a longitudinal axis to adjust an inter-pupil spacing between the left-eye optical module and the right-eye optical module; and
one or more control logic processors programmed to execute an algorithm including the steps of:
receiving the pupil position of the viewer from the eye-tracking system;
operating the actuator to adjust the inter-pupil spacing between the left-eye optical module and the right-eye optical module based on the received pupil position;
receiving image data from the one or more front facing cameras; and
operating each image generator to display the received image data onto each curved mirror.
2. The AXR wearable display apparatus of claim 1 , wherein the one or more front facing cameras include a first front facing camera mounted to the left transport apparatus and a second front facing camera mounted to the right transport apparatus.
3. The AXR wearable display apparatus of claim 1 , wherein the eye-tracking system includes one or more eye-tracking cameras and an infrared (IR) light source.
4. The AXR wearable display apparatus of claim 1 , wherein the left-eye optical module includes a left-eye partially transmissive curved mirror extending downward from the left transport apparatus, and the right-eye optical module includes a right-eye partially transmissive curved mirror extending downward from the right transport apparatus.
5. The AXR wearable display apparatus of claim 1 , further comprising a circuit board mounted to the stationary center support.
6. The AXR wearable display apparatus of claim 5 , further comprising:
a first flexible circuit coupled to the circuit board and to a left-eye image generator of the left-eye optical module; and
a second flexible circuit coupled to the circuit board and to a right-eye image generator of the right-eye optical module.
7. The AXR wearable display apparatus of claim 6 , further comprising a first heatsink coupled to the first flexible circuit and a second heatsink coupled to the second flexible circuit.
8. The AXR wearable display apparatus of claim 1 , wherein the IPD adjustment system includes a plurality of rails coupled to the stationary center support, the left transport apparatus, and the right transport apparatus such that such that the left transport apparatus and the right transport apparatus are slidable along the plurality of rails.
9. The AXR wearable display apparatus of claim 8 , wherein the actuator is configured to selectively move the left transport apparatus and the right transport apparatus along the plurality of rails to adjust the inter-pupil spacing.
10. The AXR wearable display apparatus of claim 9 , wherein the actuator includes a rack-and-pinion coupling.
11. A method of assembling an AXR wearable display apparatus to be worn by a viewer, comprising:
providing a headset support frame;
mounting one or more front facing cameras to the headset support frame;
coupling an eye-tracking system to the headset support frame, the eye-tracking system configured to provide a signal indicating a pupil position of the viewer;
providing an optical system including a left-eye optical module and a right-eye optical module, each optical module including an image generator, a partially transmissive curved mirror positioned in front of a viewer eye, and an optical image relay configured to conjugate a two-dimensional (2D) image formed from the image generator to a curved focal surface of the partially transmissive curved mirror and including a prism having a folding surface extending between an input surface and output surface and configured for folding the optical path for light generated by the image generator, and an aperture stop for the optical image relay is formed within the prism; and
coupling an inter-pupil distance (IPD) adjustment system to the headset support frame by:
mounting a stationary center support to the headset support frame;
coupling a left transport apparatus to the left-eye optical module and slideably mounting the left transport apparatus to the stationary center support for supporting the left-eye optical module from the stationary center support;
coupling a right transport apparatus to the right-eye optical module and slideably mounting the right transport apparatus to the stationary center support for supporting the right-eye optical module from the stationary center support; and
coupling an actuator to the left transport apparatus and the right transport apparatus, the actuator configured to selectively move the left transport apparatus and the right transport apparatus along a longitudinal axis to adjust an inter-pupil spacing between the left-eye optical module and the right-eye optical module; and
providing one or more control logic processors programmed to execute an algorithm including the steps of:
receiving the pupil position of the viewer from the eye-tracking system;
operating the actuator to adjust the inter-pupil spacing between the left-eye optical module and the right-eye optical module based on the received pupil position;
receiving image data from the one or more front facing cameras; and
operating each image generator to display the received image data onto each curved mirror.
12. The method of claim 11 , further comprising:
mounting a first front facing camera to the left transport apparatus; and
mounting a second front facing camera to the right transport apparatus.
13. The method of claim 11 , wherein the eye-tracking system includes one or more eye-tracking cameras and an infrared (IR) light source.
14. The method of claim 11 , wherein the left-eye optical module includes a left-eye partially transmissive curved mirror extending downward from the left transport apparatus, and the right-eye optical module includes a right-eye partially transmissive curved mirror extending downward from the right transport apparatus.
15. The method of claim 11 , further comprising mounting a circuit board to the stationary center support.
16. The method of claim 15 , further comprising:
coupling a first flexible circuit to the circuit board and to a left-eye image generator of the left-eye optical module; and
coupling a second flexible circuit to the circuit board and to a right-eye image generator of the right-eye optical module.
17. The method of claim 16 , further comprising:
coupling a first heatsink to the first flexible circuit; and
coupling a second heatsink to the second flexible circuit.
18. The method of claim 11 , further comprising coupling a plurality of rails to the stationary center support, the left transport apparatus, and the right transport apparatus such that the left transport apparatus and the right transport apparatus are slidable along the plurality of rails.
19. The method of claim 18 , wherein the actuator is configured to selectively move the left transport apparatus and the right transport apparatus along the plurality of rails to adjust the inter-pupil spacing.
20. The method of claim 19 , wherein the actuator includes a rack-and-pinion coupling.