Damped resonant piezoelectric alerting device
First Claim
1. A damped resonant piezoelectric alerting device, comprising:
- a motional mass;
a damping element magnetically coupled to said motional mass; and
a piezoelectric actuator, constrained to an actuator mount at a first end and coupled to said motional mass at a second end,said piezoelectric actuator being responsive to a control signal, for generating an alternating out-of-plane movement of said motional mass having an amplitude,whereby the alternating movement of said motional mass is transformed into tactile energy to provide a tactile alert,and further whereby the amplitude of the out-of-plane movement of said motional mass is controlled to control the tactile energy delivered.
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Accused Products
Abstract
A damped resonant piezoelectric alerting device (600) includes a motional mass (130), a damping element (136, 156) magnetically coupled to the motional mass (130) and a piezoelectric actuator (100) which is constrained to an actuator mount (132) at a first end and coupled to the motional mass (130) at a second end. The piezoelectric actuator (100) responds to a control signal (108, 110) to generate an alternating out-of-plane movement (812, 814) of the motional mass (130) at an amplitude (412, 414). The alternating out-of-plane movement (812, 814) of the motional mass (130) is transformed into tactile energy to provide a tactile alert about a resonant frequency (608). The amplitude (412, 414) of the out-of-plane movement (812, 814) of the motional mass (130) is controlled by the damping element (136, 156). The alternating out-of-plane movement (812, 814) of the motional mass (130) is also transformed into acoustic energy to provide an audible alert above the resonant frequency (608).
85 Citations
15 Claims
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1. A damped resonant piezoelectric alerting device, comprising:
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a motional mass; a damping element magnetically coupled to said motional mass; and a piezoelectric actuator, constrained to an actuator mount at a first end and coupled to said motional mass at a second end, said piezoelectric actuator being responsive to a control signal, for generating an alternating out-of-plane movement of said motional mass having an amplitude, whereby the alternating movement of said motional mass is transformed into tactile energy to provide a tactile alert, and further whereby the amplitude of the out-of-plane movement of said motional mass is controlled to control the tactile energy delivered. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification