Patents by Inventor Kai Kristian Jamsa

Kai Kristian Jamsa 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).

  • Drivers for loads such as light emitting diodes
    Patent number: 9357596
    Abstract: An apparatus is disclosed that includes a first node coupleable to a power supply, a charge storage component coupled between a second node and a third node, and a first leg between the first node and second node. The first leg includes a first switching device. The apparatus includes a second leg between the first node and the third node. The second leg includes a second switching device. The apparatus includes a third leg between the second node and a fourth node. The third leg includes a third switching device. The apparatus includes a fourth leg between the third node and the fourth node, wherein the fourth leg includes a fourth switching device. The apparatus includes one or more contacts in one of the second leg or the third leg, the one or more contacts configured to be coupled to a load. Charging and load driving operations may be performed.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: May 31, 2016
    Assignee: Nokia Technologies Oy
    Inventors: Markku Antti Kyosti Rouvala, Kai Kristian Jamsa, Samuli U. Wallius
  • Drivers for Loads Such as Light Emitting Diodes
    Publication number: 20130002165
    Abstract: An apparatus is disclosed that includes a first node coupleable to a power supply, a charge storage component coupled between a second node and a third node, and a first leg between the first node and second node. The first leg includes a first switching device. The apparatus includes a second leg between the first node and the third node. The second leg includes a second switching device. The apparatus includes a third leg between the second node and a fourth node. The third leg includes a third switching device. The apparatus includes a fourth leg between the third node and the fourth node, wherein the fourth leg includes a fourth switching device. The apparatus includes one or more contacts in one of the second leg or the third leg, the one or more contacts configured to be coupled to a load. Charging and load driving operations may be performed.
    Type: Application
    Filed: June 30, 2011
    Publication date: January 3, 2013
    Inventors: Markku Antti Kyosti Rouvala, Kai Kristian Jamsa, Samuli U. Wallius