Key input device and key scan method

Details Key input device and key scan method Key input device and key scan method

2007-09-28

2011-11-01

Edwards, Jr., Timothy (Department: 2612)

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

C341S022000, C345S168000

Reexamination Certificate

active

08049646

ABSTRACT:
In a key input device, a control section is configured to receives a key return signal as an interrupt signal in a standby mode, to set a normal mode in response to the interrupt signal, and to perform a key scan operation in the normal mode to determine an operated key. A key matrix section having a plurality of keys and configured to supply the key return signal to the control section in response to an operation to the operated key of the plurality of keys.

REFERENCES:
patent: 5534860 (1996-07-01), Phillips et al.
patent: 5798716 (1998-08-01), Davis
patent: 5805085 (1998-09-01), Hsu et al.
patent: 6680678 (2004-01-01), Chiu et al.
patent: 7742040 (2010-06-01), Jamieson et al.
patent: 2008/0111712 (2008-05-01), Himpe

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