Smartrac I.p. B.v.

Marimils Oy

Elsi Technologies Oy

Smartrac Investment B.v.

Maricare Oy

Juhani Virtanen

Donald Lupo

Heikki Seppä

Kaarle Jaakkola

Kaj Nummila

Tuomas Koskelainen

Timo Joutsenoja

Kari Kyyny

Jarkko Mäkiranta

Juha Vattulainen

Petri Välisuo

Laurentiu Barna

Kari Kymäläinen

Miika Huusko

Matti Tavilampi

Mikko Nikkanen

Antti Manninen

Harri Aalto

Kaj Nummiila

A method for producing an RFID transponder. An RFID chip is attached onto a conductive sheet. A portion of an antenna element is cut from the conductive sheet using a laser beam after the RFID chip has been attached to the conductive sheet.

Method for producing a radio frequency identification (RFID) transponder

A method for producing a radio frequency identification transponder includes

Method for producing an antenna element of an RFID transponder

A method for determining a value of an environment variable using raw data from an energetically essentially passive remote-access apparatus. A value of a first measurable quantity indicative of the environment variable is obtained from the raw data. The value of the environment variable is determined using calibration data and the value of the first measurable quantity. The accuracy is enhanced by measuring the value of the measurable quantity with a measuring signal of which strength is regulated or by obtaining a value of a second measurable quantity. The second measurable quantity is indicative of the environment variable or measurement conditions of the first measurable quantity. A method for forming calibration data for the measurements. RFID reader devices arranged to carry out the methods and energetically essentially passive remote-access apparatuses for the methods. A database that may be used with the method and a computer product including the database.

Methods for enhancing the accuracy of environment measurements using a remote-access apparatus

Method for producing an RFID transponder by etching

A sensor web for electric field sensing. A substrate has a longitudinal direction. At least one array of electrically conductive sensor areas follows each other in a successive manner along the longitudinal direction and is arranged on one side of the substrate. A group of conductors is on the same side of the substrate. Each electrically conductive sensor area that is to be used for sensing purposes is electrically connected to one conductor. The conductors are adapted to join one by one the group of the conductors advancing in the longitudinal direction of the substrate and the other conductors of the group are adapted to give space for the joining conductor. A method for manufacturing of a sensor web and a system for monitoring a space.

Electric sensor web, system and a method for its manufacture

Proximity of a person causes a change in a capacitance value of a sensor capacitor having a pair of capacitive plates. The change is detected by charging the sensor capacitor by coupling the sensor to a voltage supply. The supply is disconnected from a tank capacitor during the charging. The charge is transferred from the sensor capacitor to a tank capacitor. The supply is disconnected from the tank capacitor during the charge transfer. The charging and charge transfer are repeated several times. The voltage of the tank capacitor is monitored. At least one value is determined which depends on the rate of change of the voltage of the tank capacitor. The capacitance of the tank capacitor may be several orders of magnitude higher than the capacitance of the sensor capacitor. The large tank capacitor acts as a part of a low-pass filter which effectively filters out signal noise.

Method and device for capacitive detection of objects

An active-matrix electronic display including a switching circuit for each pixel to control the optical state of the display. The switching circuit includes at least one diode and at least one load impedance for each circuit. The front plane electrode of the display may be unpatterned over a significant portion of the display. The display architecture is especially useful for bi-stable display media that require active matrix addressing, for example electrophoretic displays, and for applications using diodes based on organic semiconductors and/or printed diodes.

Active-matrix electronic display comprising diode based matrix driving circuit

Growing community of inventors

Tampere, Finland

Juhani Virtanen