Title:
感知素子からの電流読み出しを備える容量性指紋感知装置
Document Type and Number:
Japanese Patent JP6668365
Kind Code:
B2
Abstract:
The present invention relates to a capacitive fingerprint sensing device comprising a plurality of sensing elements. Each sensing element includes a protective dielectric top layer to be touched by a finger; an electrically conductive sensing structure arranged underneath the top layer; a charge amplifier connected to the sensing structure for providing a sensing voltage signal indicative of a change of a charge carried by the sensing structure resulting from a change in a potential difference between the finger and the sensing structure; and a voltage-to-current converter for converting the sensing voltage signal to a sensing current signal indicative of the change of charge carried by the sensing structure. Hereby, accurate sensing as well as faster operation of the sensing elements can be achieved without a corresponding increase in power consumption.
Inventors:
Frank Lee Dike
Application Number:
JP2017541657A
Publication Date:
March 18, 2020
Filing Date:
February 08, 2016
Export Citation:
Assignee:
Fingerprint Cars Actie Volague
International Classes:
G06T1/00; A61B5/1172; G01B7/28; G06V40/13
Domestic Patent References:
| JP2008502989A |
Foreign References:
| WO2015005855A1 | ||||
| US20130314148 | ||||
| US20140266262 |
Attorney, Agent or Firm:
Atsushi Aoki
Shinji Mitsuhashi
Tomohiro Minamiyama
Tsuyoshi Miura
Himuro Shino
Shinji Mitsuhashi
Tomohiro Minamiyama
Tsuyoshi Miura
Himuro Shino