Method and apparatus for recognizing key

Details Method and apparatus for recognizing key Method and apparatus for recognizing key

2005-02-01

2005-02-01

Wong, Albert K (Department: 2635)

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

C710S067000, C340S014100

Reexamination Certificate

active

06850174

ABSTRACT:
A method is provided for recognizing a key in a terminal apparatus having a key matrix structure. The method according to the invention includes the steps of recognizing pushing of and detaching from a key by using a difference between a previous key status value on the key matrix and a current key status value according to a change of the key status, and obtaining a positional value of an inputted key on the key matrix by using a relational expression considering difference values between adjacent rows in each line and between adjacent lines in each row and a difference between the previous key value and the current key value.

REFERENCES:
patent: 5386584 (1995-01-01), Verstegen et al.
patent: 6426710 (2002-07-01), Chang et al.
patent: 6727829 (2004-04-01), Jam
patent: 0 188 151 (1985-12-01), None
patent: 0 635 947 (1994-05-01), None
European Search Report dated Oct. 2, 2003 issued in a counterpart application, namely, Appln. No. 02000610.2.

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