Thermal pattern sensor with shared heating elements
US10489625B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 28, 2017 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Aug 30, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/962
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A thermal pattern sensor is provided, including a matrix of several lines and columns of pixels, each pixel including at least one pyroelectric capacitance formed by at least one portion of pyroelectric material arranged between a lower electrode and an upper electrode; wherein one of the lower and upper electrodes forms a reading electrode of the pixels; and a plurality of electrically conductive portions, each being configured for Joule effect heating, independently of other portions of the plurality, of the at least one portion of pyroelectric material of the at least one pyroelectric capacitance of pixels of at least two adjacent lines of pixels associated with the each electrically conductive portion, and each being arranged facing at least a part of a surface of the reading electrode of each of the pixels of the at least two adjacent lines of pixels associated with the each electrically conductive portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.