Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Reexamination Certificate
2005-02-22
2005-02-22
Horabik, Michael (Department: 2635)
Coded data generation or conversion
Bodily actuated code generator
Including keyboard or keypad
C341S022000, C379S368000
Reexamination Certificate
active
06859150
ABSTRACT:
A new apparatus for reading keyboard-commands of a portable computer comprises a shift register, a keyboard-matrix circuit, a filter, a buffer, an address generator, a mapping device, a comparator, and an output device. The shift register is for outputting a plurality of scan-input signals and a reference signal. The keyboard-matrix circuit is for outputting a scan-output signal according to the scan-input signals. The keyboard-matrix circuit includes a plurality of nodes corresponded to the keyboard buttons, respectively. The filter is for filtering the noise of the scan-output signal. The buffer is for further stabilizing the filter signal. The address generator is for reading the location of the node corresponding to the button being pressed. The mapping device is for outputting a mapping signal corresponding to the button being pressed. The comparator is for outputting a comparing signal, which represents the command corresponded to the pressed button. The output device is for outputting a data clock signal and a data output signal serially according to the comparing signal.
REFERENCES:
patent: 4502039 (1985-02-01), Vercesi et al.
patent: 4675653 (1987-06-01), Priestley
patent: 57-114935 (1982-07-01), None
patent: 3005222 (1994-10-01), None
patent: 2-27831 (2000-08-01), None
Cho Yu-Bin
Kuo Hubert
Lin I-Ming
Dang Hung
Horabik Michael
Rabin & Berdo P.C.
Via Technologies Inc.
LandOfFree
Apparatus for reading keyboard-commands of a portable computer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for reading keyboard-commands of a portable computer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for reading keyboard-commands of a portable computer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3495214