US 10,380,400 B2 · Fingerprint or palmprint sensor

Abstract

The invention relates to a skin print sensor (140) comprising, on a supporting substrate, a plurality of elementary acquisition cells (141), each of which includes: a reading node (SN); a first photoelectric or pyroelectric conversion element (PYR) having a first electrode that is connected to the reading node (SN) as well as a second electrode that is connected to a control node (CMD) of the cell; and a third electrode (EL) that is connected to the reading node (SN), is coated with a dielectric layer and is designed to form a capacitance along with the skin of a user; in each cell of said sensor, the control node (CMD) is designed to receive a control signal that initiates reading of a value on the reading node (SN), said value representing the capacitance formed between the third electrode (EL) and the user's skin.

Claims10

Dependent claims

A print sensor comprising, on a support substrate, a plurality of elementary acquisition cells, each cell comprising:

a sense node;
a first photoelectric or pyroelectric conversion element having a first electrode connected to the sense node and a second electrode connected to a control node of the cell;
and
a third electrode connected to the sense node, the third electrode being coated with a dielectric layer and being intended to form a capacitor with a user's skin,
wherein, in each cell, the control node is capable of receiving a control signal enabling to implement the reading out, from the sense node, of a value representative of the capacitance formed between the third electrode and the user's skin.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/569,068Filed 27 Apr 2016

Priority

FR 15 5392130 Apr 2015

Published

US 2018/0137325 A117 May 2018

Granted

13 Aug 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

G06V 40/1306
Sensors therefor: non-optical, e.g. ultrasonic or capacitive sensing
G06V 40/1318
Sensors therefor: using electro-optical elements or layers, e.g. electroluminescent sensing
G06V 40/1359
Preprocessing; Feature extraction: extracting features related to ridge properties; Determining the fingerprint type, e.g. whorl or loop
H10F 39/8037
Pixels having integrated switching, control, storage or amplification elements: the integrated elements comprising a transistor

Fingerprint or palmprint sensor

Life of this patent

Fingerprint or palmprint sensor

Life of this patent

Abstract

Claims10