Input device

Details Input device Input device

2008-01-29

2008-01-29

Wong, Albert K. (Department: 2612)

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

C367S112000, C345S168000

Reexamination Certificate

active

11352572

ABSTRACT:
An input device includes a plurality of input keys arranged in a matrix of three or more rows and three or more columns; electrodes facing parts of or all surfaces of the input keys that surround intersection of rows and columns formed by the arrangement of the input keys; and an input key detecting unit that identifies operated input keys among the plurality of input keys by combinations of the electrodes having a change in electrostatic capacitance. With this structure, the number of electrodes can be less than that of the input keys.

REFERENCES:
patent: 3668698 (1972-06-01), Demirdjioghlou et al.
patent: 4543564 (1985-09-01), Audoin et al.
patent: 4772874 (1988-09-01), Hasegawa
patent: 2004-201175 (2004-07-01), None

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