Piezo electric keypad assembly with tactile feedback
First Claim
1. A keypad assembly for a portable communication device comprising:
- at least one key having a piezoelectric layer, a first conductive layer on one side of said piezoelectric layer and a second conductive layer on another side of said piezoelectric layer; and
an electronic circuit coupled to said first and second conductive layers of said at least one key, said electronic circuit being effective to provide a stimulus signal to said at least one key in response to receiving a selection signal from said at least one key.
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Accused Products
Abstract
This invention is a keypad assembly (100) for a portable communication device having a plurality of piezoelectric keys (110) to receive user input and providing tactile feedback to the user in response to such user input. The keypad assembly (100) includes one or more keys in which each key (110) has a piezoelectric layer (210), a conductive layer (220) on one side of the piezoelectric layer and another conductive layer (230) on the other side of the piezoelectric layer. The keypad assembly (100) also includes an electronic circuit (120) coupled to the conductive layers (220, 230) of each key (110). When the electronic circuit (120) receives a selection signal from a particular key (110) of the keypad assembly (100), the electronic circuit provides a feedback signal to the particular key in response.
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Citations
14 Claims
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1. A keypad assembly for a portable communication device comprising:
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at least one key having a piezoelectric layer, a first conductive layer on one side of said piezoelectric layer and a second conductive layer on another side of said piezoelectric layer; and
an electronic circuit coupled to said first and second conductive layers of said at least one key, said electronic circuit being effective to provide a stimulus signal to said at least one key in response to receiving a selection signal from said at least one key. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification