Keypad device and operation method thereof

Details Keypad device and operation method thereof Keypad device and operation method thereof

2006-09-12

2006-09-12

Chang, Kent (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Including keyboard

C341S022000

Reexamination Certificate

active

07106304

ABSTRACT:
A keypad device including a parallel/serial conversion device, a keypad module, and a controller coupled to the parallel/serial conversion device and the keypad module. The keys in the keypad module are arranged in parallel. After the key is triggered, an interrupt signal will be fed to the controller. On receiving the interrupt signal, the controller will feed a drive voltage to the keypad module generating a parallel signal therein. After causing the parallel/serial conversion device to read and store the parallel signal, the controller will be able to read the parallel signal serially by using the clock signals. The status of the keypad module can thereby be obtained.

REFERENCES:
patent: 3909818 (1975-09-01), Dalke et al.
patent: 5220601 (1993-06-01), Gulick et al.
patent: 5585792 (1996-12-01), Liu et al.
patent: 5760714 (1998-06-01), Zimmerman
patent: 5925110 (1999-07-01), Klein
patent: 5958023 (1999-09-01), Klein
patent: 6072472 (2000-06-01), Shiga
patent: 6489950 (2002-12-01), Griffin et al.

Affiliated with

Also associated with

Rating

Keypad device and operation method thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Keypad device and operation method thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Keypad device and operation method thereof will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3607180