Resonant piezoelectric alerting device
First Claim
1. A resonant piezoelectric alerting device, comprising:
- a 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 and said motional mass in combination producing a resonant system having a predetermined frequency of operation, whereinsaid piezoelectric actuator being responsive to a control signal generated at the predetermined frequency, for producing an out-of-plane movement of said motional mass and for maximizing the amplitude of the out-of-plane movement of said motional mass,whereby the out-of-plane movement of said motional mass is transformed into tactile energy to provide a tactile alert, and further whereinsaid piezoelectric actuator being responsive to a control signal generated at frequencies above the predetermined frequency, for producing an out-of-plane movement of said piezoelectric actuator,whereby the out-of-plane movement of said piezoelectric actuator is transformed into acoustic energy to provide an audible alert.
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Accused Products
Abstract
A resonant piezoelectric alerting device (400) includes a 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 and the motional mass in combination producing a resonant system having a predetermined frequency of operation. The piezoelectric actuator 9100) is responsive to a control signal (108, 110) generated at the predetermined frequency generates an alternating out-of-plane movement(812, 814) of said motional mass (130) which is transformed into tacile energy to provide a tactile alert about the resonant frequency (608). The out-of-plane movement (812, 814) of the motional mass (130) is also transformed into acoustic energy to provide an audible alert in response to a control signal generated above the predetermined frequency (608).
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Citations
18 Claims
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1. A resonant piezoelectric alerting device, comprising:
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a 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 and said motional mass in combination producing a resonant system having a predetermined frequency of operation, wherein said piezoelectric actuator being responsive to a control signal generated at the predetermined frequency, for producing an out-of-plane movement of said motional mass and for maximizing the amplitude of the out-of-plane movement of said motional mass, whereby the out-of-plane movement of said motional mass is transformed into tactile energy to provide a tactile alert, and further wherein said piezoelectric actuator being responsive to a control signal generated at frequencies above the predetermined frequency, for producing an out-of-plane movement of said piezoelectric actuator, whereby the out-of-plane movement of said piezoelectric actuator is transformed into acoustic energy to provide an audible alert. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A resonant piezoelectric alerting device, comprising:
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a motional mass; 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 and motional mass in combination producing a resonant system having a predetermined frequency of operation; and a housing for enclosing said motional mass and said piezoelectric actuator, wherein said piezoelectric actuator being responsive to a control signal generated at the predetermined frequency, for producing an out-of-plane movement of said motional mass and for maximizing the amplitude of the out-of-plane movement of said motional mass, whereby the out-of-plane movement of said motional mass is transformed into tactile energy to provide a tactile alert, and further wherein said piezoelectric actuator being responsive to a control signal generated at frequencies above the predetermined frequency, for producing an out-of-plane movement of said piezoelectric actuator, whereby the out-of-plane movement of said piezoelectric actuator is transformed into acoustic energy to provide an audible alert. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification