Sensing element arrangement for a fingerprint sensor

Details Sensing element arrangement for a fingerprint sensor Sensing element arrangement for a fingerprint sensor

2006-08-01

2006-08-01

Deb, Anjan (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S690000

Reexamination Certificate

active

07084642

ABSTRACT:
For each pixel in an array of pixels in a fingerprint sensor, a fingerprint capacitor is defined by the fingerprint-bearing skin of a user's finger proximate to the top exposed surface of a sensing plate of the pixel. First and second plates are embedded in dielectric material beneath the sensing plate, and define therewith first and second capacitors of a sensing element. The capacitance of the fingerprint capacitor is coupled by the sensing element to an amplifier. During a sensing operation, the amplifier generates a pixel output signal that is a function of the variable capacitance of the fingerprint capacitor, which varies according to the presence of a fingerprint ridge or valley appearing directly above the sensing plate when the user's finger is in contact with the fingerprint sensor.

REFERENCES:
patent: 4353056 (1982-10-01), Tsikos
patent: 6016355 (2000-01-01), Dickinson et al.
patent: 6392636 (2002-05-01), Ferrari et al.
patent: 6636053 (2003-10-01), Gozzini
patent: 2002/0125437 (2002-09-01), Izumi et al.
patent: 2002/0156593 (2002-10-01), Hayes et al.
patent: 2003/0035572 (2003-02-01), Kalnitsky et al.
patent: 2003/0102874 (2003-06-01), Lane et al.

Affiliated with

Also associated with

Rating

Sensing element arrangement for a fingerprint sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sensing element arrangement for a fingerprint sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sensing element arrangement for a fingerprint sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3647907