Key input apparatus using magnetic force, operating method...

Details Key input apparatus using magnetic force, operating method... Key input apparatus using magnetic force, operating method...

2005-11-23

2010-02-23

Wong, Albert K (Department: 2612)

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

C341S032000, C341S020000, C400S490000, C400S491000, C200S0050EA, C335S205000

Reexamination Certificate

active

07667623

ABSTRACT:
A method of operating a key input apparatus having one or more pressable keys, and a key input apparatus to perform the method, the method including selectively controlling an electromagnetic force to support at least one of the one or more pressable keys, wherein a height of the at least one pressable key is controlled by selectively supplying electric current to an electromagnet to control the electromagnetic force.

REFERENCES:
patent: 3831730 (1974-08-01), Koeppe
patent: 4054944 (1977-10-01), Lau
patent: 4342975 (1982-08-01), Charpentier
patent: 5066951 (1991-11-01), Munster et al.
patent: 6497521 (2002-12-01), Lohr
patent: 6962452 (2005-11-01), Cheng
patent: 7230190 (2007-06-01), Kwong et al.

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