Multiple input proximity detector and touchpad system

Details Multiple input proximity detector and touchpad system Multiple input proximity detector and touchpad system

2002-10-24

2009-08-11

Edwards, Jr., Timothy (Department: 2612)

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

C341S034000, C345S173000, C345S174000, C178S018060, C400S479100

Reissue Patent

active

RE040867

ABSTRACT:
A touchpad is formed of an electrically insulating membrane (10) with a first series of spaced apart conductors (12) on a first face of membrane (10) and a second series of spaced apart conductors (14) on or proximal thereto, in which there is no electrical contact between the first and second series of conductors (12, 14) Each conductor in the first and second series of conductors is sensitive to the proximity of a finger to modify the capacitance of the proximate conductor to detect the presence of the finger positioned close to that conductor. A scanning system operative to sample one of the conductors in turn from both the first and second series of conductors (12, 14) in order to measure and store a capacitance value associated with that respective conductor. The scanning system is operative to maintain all conductors (12-n,14-n) at a common potential equal to the potential of the conductor being sampled when the remaining conductors are not actively being sampled by the scanning system.

REFERENCES:
patent: 4620062 (1986-10-01), Mizzi et al.
patent: 4686332 (1987-08-01), Greanias et al.
patent: 4725696 (1988-02-01), Furukawa et al.
patent: 4745240 (1988-05-01), Furukawa et al.
patent: 4745241 (1988-05-01), Furukawa et al.
patent: 4954823 (1990-09-01), Binstead
patent: 5117071 (1992-05-01), Greanias et al.
patent: 5159159 (1992-10-01), Asher
patent: 5459463 (1995-10-01), Gruaz et al.
patent: 5844506 (1998-12-01), Binstead
patent: 39 10977 (1990-10-01), None
patent: 3910977 (1990-10-01), None
patent: 0078676 (1983-05-01), None
patent: 0 078 676 (1983-05-01), None
patent: 0609021 (1994-08-01), None
patent: 0 609 021 (1994-08-01), None
patent: WO 95/27334 (1995-10-01), None

Affiliated with

Also associated with

Rating

Multiple input proximity detector and touchpad system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiple input proximity detector and touchpad system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple input proximity detector and touchpad system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4112390