Removable frames for head-mounted display systems
In one example, an apparatus may include a frame that includes an optical component configured for use with a near-eye display that is part of a head-worn display system. The frame magnetically attaches to the head-worn display system, and when the frame is attached to the head-worn display system, the frame may align the optical component for use with the near-eye display. Various other methods, systems, and computer-readable media are also disclosed.
1. An apparatus comprising:
an optical component configured for use with a near-eye display of a head-worn display system, wherein:
the optical component comprises an emitter that, when aligned with the near-eye display, emits light toward an eye of a user; and
the head-worn display system comprises (1) a power source for the emitter and (2) an eye-tracking subsystem that has at least one sensor and is configured to track the eye of the user by detecting light from the emitter that is reflected from the eye of the user; and
a frame that magnetically attaches to the head-worn display system, wherein:
the frame comprises the optical component, which attaches to the frame via a kinematic mounting mechanism, and an electrical terminal;
the kinematic mounting mechanism comprises (1) a first spherical surface in contact with a concave tetrahedron, (2) a second spherical surface in contact with a v-shaped groove, and (3) a third spherical surface in contact with a flat plate; and
when the frame is attached to the head-worn display system, (1) the frame aligns the emitter relative to the at least one sensor and (2) the electrical terminal electrically couples the emitter to the power source.
2. The apparatus of claim 1 , wherein the optical component comprises a lens configured to, when aligned for use with the near-eye display, focus light from the near-eye display on an eye of a user.
3. The apparatus of claim 2 , wherein the lens is dimensioned to correct for at least a portion of a refractive error of the eye of the user.
4. The apparatus of claim 1 , wherein the emitter comprises a plurality of infrared light emitters disposed around a perimeter of the frame.
5. The apparatus of claim 4 , wherein the infrared light emitters are configured to, when aligned with the near-eye display, emit infrared light toward an eye of a user.
6. The apparatus of claim 1 , wherein the electrical terminal comprises a spring-loaded pin.
7. The apparatus of claim 1 , wherein the electrical terminal comprises a socket dimensioned to receive a spring-loaded pin.
8. The apparatus of claim 1 , wherein the frame is configured to magnetically attach to the head-worn display system at an exit-pupil side of the near-eye display.
9. The apparatus of claim 1 , wherein:
the optical component comprises a right lens and a left lens;
the frame is dimensioned to hold the right lens between a right eye of a user a the near-eye display; and
the frame is dimensioned to hold the left lens between a left eye of the user and the near-eye display.
10. The apparatus of claim 1 , wherein the near-eye display comprises:
a projector; and
a waveguide comprising a coupling element that receives light from the projector and a decoupling element that transmits the light from the projector toward an eye of a user.
11. The apparatus of claim 1 , wherein (1) the concave tetrahedron provides three contact points for the first spherical surface, (2) the V-shaped groove provides two contact points for the second spherical surface, and (3) the flat plate provides one contact point for the third spherical surface.
12. The apparatus of claim 1 , wherein the concave tetrahedron comprises a center of rotation for the kinematic mounting mechanism.
13. A head-worn display system comprising:
a near-eye display;
an optical component configured for use with the near-eye display, wherein the optical component comprises an emitter that, when aligned with the near-eye display, emits light toward an eye of a user;
a power source for the emitter;
an eye-tracking subsystem that has at least one sensor and is configured to track the eye of the user by detecting light from the emitter that is reflected from the eye of the user; and
a frame that is magnetically detachable from the head-worn display system, wherein:
the frame comprises the optical component, which attaches to the frame via a kinematic mounting mechanism, and an electrical terminal;
the kinematic mounting mechanism comprises (1) a first spherical surface in contact with a concave tetrahedron, (2) a second spherical surface in contact with a v-shaped groove, and (3) a third spherical surface in contact with a flat plate; and
when the frame is attached to the head-worn display system, (1) the frame aligns the emitter relative to the at least one sensor and (2) the electrical terminal electrically couples the emitter to the power source.
14. The head-worn display system of claim 13 , further comprising a head-worn display system frame dimensioned to hold the near-eye display in front of an eye of a user.
15. The head-worn display system of claim 13 , wherein the near-eye display comprises at least one virtual-reality display screen.
16. The head-worn display system of claim 13 , wherein the near-eye display comprises:
a projector; and
a waveguide comprising a coupling element that receives light from the projector and a decoupling element that transmits the light from the projector toward an eye of a user.
17. The head-worn display system of claim 13 , wherein:
the optical component comprises a right lens and a left lens;
the frame is dimensioned to hold the right lens between a right eye of a user a the near-eye display; and
the frame is dimensioned to hold the left lens between a left eye of the user and the near-eye display.
18. The head-worn display system of claim 17 , wherein:
the emitter comprises:
at least one left emitter that emits light toward the left eye of the user; and
at least one right emitter that emits light toward the right eye of the user; and
the eye-tracking subsystem is configured to track the left and right eyes of the user by detecting light from the left and right emitters that is reflected from the left and right eyes of the user.
19. The head-worn display system of claim 17 , wherein:
the left lens is dimensioned to correct for at least a portion of a refractive error of the left eye of the user; and
the right lens is dimensioned to correct for at least a portion of a refractive error of the right eye of the user.
20. A device comprising:
a frame configured to releasably attach to a head-worn optical system via a kinematic mounting mechanism comprising (1) a first spherical surface in contact with a concave tetrahedron, (2) a second spherical surface in contact with a v-shaped groove, and (3) a third spherical surface in contact with a flat plate, wherein the frame comprises an emitter that, when aligned with a near-eye display, emits light toward an eye of a user, and an electrical terminal;
the head-worn optical system comprises (1) a power source for the emitter and (2) an eye-tracking subsystem that has at least one sensor and is configured to track the eye of the user by detecting light from the emitter that is reflected from the eye of the user; and
at least one emitter disposed within the frame, wherein:
the frame, when attached to the head-worn optical system, positions the emitter to emit light toward the eye of the user and positions the electrical terminal to electrically couple the emitter to the power source; and
the eye-tracking subsystem is configured to track the eye of the user by detecting light from the emitter that is reflected from the eye of the user.