| 摘要 |
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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