Capacitive fingerprint sensor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 5, 1982
Grant Date -
N/A
app pub date -
Jun 5, 1980
filing date -
Jun 5, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The sensor incorporates a sensing member which has a sensing surface for receiving a fingerprint and sensing means for sensing the ridges and valleys of the skin of the finger under investigation. The sensing member contains a multitude of small capacitors. When the finger is pressed against the sensing surface, the capacitances of the capacitors are locally changed in accordance with the ridges and valleys. The information about the capacitance distribution is transformed into an electric signal.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully