Logic circuit using hardware to process keyboard scanning

Details Logic circuit using hardware to process keyboard scanning Logic circuit using hardware to process keyboard scanning

2005-12-27

2005-12-27

Wong, Albert K. (Department: 2635)

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

C341S020000, C341S014000, C345S168000

Reexamination Certificate

active

06980135

ABSTRACT:
A logic circuit uses hardware to process keyboard scanning, more especially, a microprocessing system inputs the signal through a pressed key into a control circuit for conducting operation; since the column input end has electric resistance with higher driving ability than that of the row output/input end, a higher electric potential status is thereby obtained and conducted with the circuit through a pressed key to make the high and the lower electric potentials approach in accordance with each other and generate electric potential change, or through a converting method of automatically driving electric potential, the innovative effect of the present invention is achieved.

REFERENCES:
patent: 4583189 (1986-04-01), Koyama
patent: 5057836 (1991-10-01), Inaba
patent: 5381142 (1995-01-01), Simmons, Jr.
patent: 5619196 (1997-04-01), Escobosa
patent: 5719597 (1998-02-01), Fong
patent: 5760714 (1998-06-01), Zimmerman
patent: 5798716 (1998-08-01), Davis
patent: 5872561 (1999-02-01), Figie et al.
patent: 5877709 (1999-03-01), Ala-Lehtimaki et al.
patent: 5929790 (1999-07-01), Lim
patent: 6020833 (2000-02-01), Chang et al.
patent: 6737990 (2004-05-01), Chau
patent: 6762697 (2004-07-01), Lin

Affiliated with

Also associated with

Rating

Logic circuit using hardware to process keyboard scanning does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Logic circuit using hardware to process keyboard scanning, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Logic circuit using hardware to process keyboard scanning will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3499574