Patents by Inventor Lars Wern

Lars Wern has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Multi purpose capacitive sensor
    Patent number: 8941391
    Abstract: A multi purpose capacitive sensor suitable for indicating close proximity of a person to a surface along a large-size truck as well as along a medium-size painting or a pocket-size mobile phone is disclosed. The sensor comprises a voltage measuring device provided with a signal ground connected to a first pole of an oscillating voltage source that has a second pole connected to a signal input of the voltage measuring device. This input has a first capacitance to earth and a second capacitance to the signal ground. A third capacitance is exhibited to earth by the second pole of said voltage source. According to the invention, a prebias component is connected between the second pole of the voltage source and the signal input of the voltage measuring device.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: January 27, 2015
    Assignee: P-Phone Control AB
    Inventor: Lars Wern
  • MULTI PURPOSE CAPACITIVE SENSOR
    Publication number: 20130162267
    Abstract: A multi purpose capacitive sensor suitable for indicating close proximity of a person to a surface along a large-size truck as well as along a medium-size painting or a pocket-size mobile phone is disclosed. The sensor comprises a voltage measuring device provided with a signal ground connected to a first pole of an oscillating voltage source that has a second pole connected to a signal input of the voltage measuring device. This input has a first capacitance to earth and a second capacitance to the signal ground. A third capacitance is exhibited to earth by the second pole of said voltage source. According to the invention, a prebias component is connected between the second pole of the voltage source and the signal input of the voltage measuring device.
    Type: Application
    Filed: June 29, 2011
    Publication date: June 27, 2013
    Inventor: Lars Wern