Haptic output device

• US 9,829,981 B1
• Filed: 05/26/2016
• Issued: 11/28/2017
• Est. Priority Date: 05/26/2016
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Ji, Qigen
• Primary Examiner(s): Hunnings, Travis
• Application Number:
  US15/166,227
• Publication Number:
  US 20170344115A1
• Time in Patent Office: 551 Days
• CPC Class Codes: G06F 3/016 Input arrangements with force or tactile feedback as computer generated output to the user

Abstract

A haptic actuator is disclosed. The haptic actuator comprises a magnet, a conductor set apart from the magnet by a gap, and an actuator coupled to the magnet. The actuator is configured to move the magnet between a first position in which the conductor is subjected to, from the magnet, a first net magnetic flux having a first direction, and a second position in which the conductor is subjected to, from the magnet, a second net magnetic flux having a second direction different than the first direction.

Claims

1. A haptic actuator, comprising:

a magnet;

a conductor set apart from the magnet by a gap; and

an actuator coupled to the magnet and configured to move the magnet between;

a first position in which the conductor is subjected to, from the magnet, a first net magnetic flux having a first direction; and

a second position in which the conductor is subjected to, from the magnet, a second net magnetic flux having a second direction different than the first direction.

2. The haptic actuator of claim 1, wherein:

the magnet is a magnetic beam extending along a longitudinal axis;

the conductor extends along an axis substantially parallel to the longitudinal axis;

the gap is oriented along a plane;

when an alternating current is applied to the conductor when the magnetic beam is in the first position, the conductor oscillates along an axis substantially parallel to the plane; and

when the alternating current is applied to the conductor when the magnetic beam is in the second position, the conductor oscillates along an axis substantially perpendicular to the plane.

3. The haptic actuator of claim 2, wherein:

when the magnetic beam is in the first position, the conductor is substantially centered relative to the longitudinal axis of the magnetic beam; and

when the magnetic beam is in the second position, the conductor is off-center relative to the longitudinal axis of the magnetic beam.

4. The haptic actuator of claim 1, wherein:

the haptic actuator comprises;

an array of magnetic beams each extending along a longitudinal axis; and

a winding comprising a set of conductive segments each substantially parallel to the longitudinal axis of a respective magnetic beam;

the magnet is one of the magnetic beams of the array of magnetic beams; and

the conductor is one of the conductive segments of the winding.

5. The haptic actuator of claim 4, wherein adjacent magnetic beams in the array of magnetic beams have opposite magnetic polarities.

6. The haptic actuator of claim 4, wherein the array of magnetic beams is a Halbach array.

7. The haptic actuator of claim 1, wherein:

the haptic actuator further comprises a substrate; and

the conductor is coupled to the substrate.

8. An electronic device, comprising:

a housing;

a display within the housing; and

a vibrator within the housing, comprising;

a first actuation component;

a second actuation component set apart from the first actuation component by a gap;

a conductive winding coupled to one of the first or second actuation components; and

an actuator configured to shift the second actuation component relative to the first actuation component;

wherein

when the second actuation component is in a first position relative to the first actuation component, a first current applied to the conductive winding causes the first actuation component to oscillate along a first axis; and

when the second actuation component is in a second position relative to the first actuation component, a second current applied to the conductive winding causes the first actuation component to oscillate along a second axis different than the first axis.

9. The electronic device of claim 8, further comprising a controller operatively coupled to the vibrator and configured to:

cause the first current to be applied to the conductive winding;

cause the actuator to shift the second actuation component relative to the first actuation component; and

cause the second current to be applied to the conductive winding.

10. The electronic device of claim 9, wherein:

the conductive winding is coupled to the first actuation component; and

the second actuation component comprises a magnet.

11. The electronic device of claim 8, wherein the conductive winding has a serpentine shape.

12. The electronic device of claim 8, wherein the actuator comprises a piezoelectric material.

13. The electronic device of claim 8, wherein:

the first actuation component is coupled to a first component of the electronic device via a first compliant member; and

the second actuation component is coupled to a second component of the electronic device via a second compliant member.

14. The electronic device of claim 13, wherein the first and second compliant members comprise elastomeric sheets.

15. A haptic actuator, comprising:

a magnetic component comprising a set of magnets defining a first plane; and

a conductive component defining a second plane substantially parallel to the first plane and comprising a set of conductive segments;

wherein

the conductive component is positioned relative to the magnetic component such that each conductive segment is subjected to a net magnetic flux having a direction that is substantially parallel to the first and second planes to produce motion of at least one of the magnetic component or the conductive component in a direction substantially perpendicular to the first and second planes.

16. The haptic actuator of claim 15, wherein:

the conductive component comprises;

a substrate; and

a serpentine winding coupled to the substrate; and

the conductive segments are portions of the serpentine winding.

17. The haptic actuator of claim 16, wherein:

each conductive segment is configured to carry an electrical current in a direction opposite an adjacent conductive segment; and

adjacent magnets in the magnetic component have opposite magnetic polarities.

18. The haptic actuator of claim 17, wherein respective conductive segments are substantially centered relative to a boundary between two respective magnets.

19. The haptic actuator of claim 16, wherein the serpentine winding comprises a plurality of wires.

20. The haptic actuator of claim 15, wherein the magnetic component further comprises a ferrous plate coupled to the set of magnets on a side of the magnetic component facing away from the conductive component.