Haptic feedback system having two independent actuators
AssigneeMicrosoft Technology Licensing, LLC
InventorsSiyuan Ma, James David Holbery
Life of this patent
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Abstract
An electronic device comprises a haptic feedback system. The haptic feedback system includes a first haptic actuator coupled to a controller via a first set of two or more electrodes, and a second haptic actuator coupled to the first haptic actuator, and further coupled to the controller via a second set of two or more electrodes. The controller is configured to provide a first drive signal to the first haptic actuator via the first set of two or more electrodes, and to provide a second drive signal, different from the first drive signal, to the second haptic actuator via the second set of two or more electrodes. Combining two haptic actuators allows for a broader range of feedback and a heightened user experience.
Claims17
An electronic device, comprising:
- a haptic feedback system, comprising
- a first haptic actuator comprising a piezoelectric polymer;
- a second haptic actuator comprising a piezoelectric ceramic;
- a silicone adhesive layer between the first haptic actuator and the second haptic actuator, the silicone adhesive layer configured to mitigate displacement due to elastic modulus mismatch between the first haptic actuator and the second haptic actuator;
- and
- a controller connected to the first haptic actuator by a first electrode and to the second haptic actuator by a second electrode, the controller comprising instructions executable to provide a first drive signal to the first haptic actuator via the first electrode, and to provide a second drive signal, different from the first drive signal, to the second haptic actuator via the second electrode.
A method for operating a haptic feedback system, comprising:
- providing a first drive signal to a first haptic actuator via a first electrode, thereby causing the first haptic actuator to vibrate at a first frequency of 10 Hz or higher;
- and
- providing a second drive signal to a second haptic actuator via a second electrode, thereby causing the second haptic actuator to vibrate at a second frequency greater than the first frequency, the first haptic actuator and the second haptic actuator being arranged within a stack including a silicone adhesive layer between the first haptic actuator and the second haptic actuator, the silicone adhesive layer configured to mitigate displacement due to elastic modulus mismatch between the first haptic actuator and the second haptic actuator.
An electronic device, comprising:
- a haptic feedback system, including
- a first haptic actuator;
- a second haptic actuator;
- a silicone adhesive layer between the first haptic actuator and the second haptic actuator, the silicone adhesive layer comprising a high compliance material configured to maintain an alignment between the first haptic actuator and the second haptic actuator;
- and
- a controller connected to the first haptic actuator by a first electrode and further connected to the second haptic actuator by a second electrode, the controller comprising instructions executable to
- provide, via the first electrode, a first drive signal to the first haptic actuator to drive the first haptic actuator at a first frequency of 10 Hz or greater, and
- provide, via the second electrode, a second drive signal to the second haptic actuator to drive the second haptic actuator at a second frequency greater than the first frequency.
Dependencies are inferred from the claim text.