APPARATUS AND METHOD FOR SELECTIVELY DRIVING A PIEZO TRANSDUCER
First Claim
1. An apparatus for controlling a device having a touch sensor, comprising:
- a piezo transducer for detecting a pressure pattern applied to the sensor;
a comparator coupled to the transducer; and
a pressure pattern recognition circuit coupled to a comparator output of the comparator, the circuit being configured to;
determine whether the pressure pattern satisfies a predetermined condition; and
in response to the pressure pattern satisfying the predetermined condition, generate an output signal.
1 Assignment
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Accused Products
Abstract
Devices and methods are provided for selectively driving a piezo transducer to operate as a pressure pattern detector or an alarm generator. In one embodiment, there is provided a device that includes: a piezo transducer; a comparator coupled to the transducer and a reference voltage; and a pressure pattern recognition circuit coupled to a comparator output of the comparator. The pressure pattern recognition circuit may be configured to: (i) determine whether the pressure pattern satisfies a predetermined condition; and (ii) in response to the pressure pattern satisfying the predetermined condition, generate an output signal.
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Citations
10 Claims
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1. An apparatus for controlling a device having a touch sensor, comprising:
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a piezo transducer for detecting a pressure pattern applied to the sensor; a comparator coupled to the transducer; and a pressure pattern recognition circuit coupled to a comparator output of the comparator, the circuit being configured to; determine whether the pressure pattern satisfies a predetermined condition; and in response to the pressure pattern satisfying the predetermined condition, generate an output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for controlling a device having a touch sensor, comprising:
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sensing a pressure pattern applied to a sensor; determining whether the pressure pattern satisfies a predetermined condition; in response to the pressure pattern satisfying the predetermined condition, generating an output signal; controlling the device via the output signal; and generating an alarm based on the output signal, wherein the alarm is generated using a transducer coupled to the sensor.
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Specification