Patents by Inventor Risto Pirhonen

Risto Pirhonen 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).

  • Patent number: 7106293
    Abstract: A lighting control method and an electronic device. The lighting of the display of the device can be adjusted according to ambient lighting. Information on the ambient lighting is transmitted to a light-sensitive component of the device through a light guide that is integrated as part of a protective display window.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: September 12, 2006
    Assignee: Nokia Corporation
    Inventor: Risto Pirhonen
  • Patent number: 7020443
    Abstract: The invention relates to a method for measuring a radio frequency signal in a wireless station (1). In this method, radio frequency power is measured by means of testing equipment (6, 7, 12), which includes at least a testing apparatus (7), a measuring head (6) and means (12) for transmitting electrical signals between the testing apparatus (7) and measuring head (6). The wireless station (1) includes at least one radio part (8), a wiring board (2), an antenna (5) and switching means (3, 22). This test switch has at least an first position, in which the radio frequency signal is directed between the radio part (8) of the wireless station (1) and the antenna (5), and a second position, in which the radio frequency signal is directed between the radio part (8) of the wireless station (1) and the testing apparatus (7) via the switching means (3, 22) and the measuring head (6).
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: March 28, 2006
    Assignee: Nokia Mobile Phones, Ltd.
    Inventors: Olli Talvitie, Urpo Nokkonen, Jane Lehtilä, Antti Hentinen, Risto Pirhonen, Jukka Eerikäinen
  • Patent number: 6835923
    Abstract: The present invention relates to proximity sensors. It also relates to proximity sensors in electronic devices using lightguides. More specifically the invention relates to a simple self monitoring of optical proximity sensors. This can be achieved according to one embodiment of the present invention by a system of lightguides for the use in proximity sensor. The lightguide system comprises a transceiver lightguide to direct-transmitter to a predefined direction, and a receiver lightguide to direct transmitter light reflected from an object towards a receiver, where the transceiver and receiver lightguides comprise diffracting surfaces to direct a part of-the light from the transmitter as a self monitoring beam in a direction towards a receiver.
    Type: Grant
    Filed: November 16, 2001
    Date of Patent: December 28, 2004
    Assignee: Nokia Corporation
    Inventors: Tiina Hämäläinen, Henri Vähä-Ypyä, Risto Pirhonen, Vesa Peili
  • Publication number: 20030094566
    Abstract: The present invention relates to proximity sensors. It also relates to proximity sensors in electronic devices using lightguides. More specifically the invention relates to a simple self monitoring of optical proximity sensors. This can be achieved according to one embodiment of the present invention by a system of lightguides for the use in a proximity sensor. The lightguide system comprises a transceiver lightguide to direct transmitter to a predefined direction, and a receiver lightguide to direct transmitter light reflected from an object towards a receiver, where the transceiver and receiver lightguides comprise diffracting surfaces to direct a part of the light from the transmitter as a self monitoring beam in a direction towards a receiver.
    Type: Application
    Filed: November 16, 2001
    Publication date: May 22, 2003
    Inventors: Tiina Hamalainen, Henri Vaha-Ypya, Risto Pirhonen, Vesa Peili
  • Publication number: 20030095093
    Abstract: A lighting control method and an electronic device. The lighting of the display of the device can be adjusted according to ambient lighting. Information on the ambient lighting is transmitted to a light-sensitive component of the device through a light guide that is integrated as part of a protective display window.
    Type: Application
    Filed: November 14, 2002
    Publication date: May 22, 2003
    Inventor: Risto Pirhonen
  • Publication number: 20010023176
    Abstract: The invention relates to a method for measuring a radio frequency signal in a wireless station (1). In this method, radio frequency power is measured by means of testing equipment (6, 7, 12), which comprises at least a testing apparatus (7), a measuring head (6) and means (12) for transmitting electrical signals between said testing apparatus (7) and measuring head (6). The wireless station (1) comprises at least one radio part (8), a wiring board (2), an antenna (5) and switching means (3, 22). This test switch has at least an first position, in which the radio frequency signal is directed between the radio part (8) of the wireless station (1) and the antenna (5), and a second position, in which the radio frequency signal is directed between the radio part (8) of the wireless station (1) and the testing apparatus (7) via said switching means (3, 22) and the measuring head (6).
    Type: Application
    Filed: March 14, 2001
    Publication date: September 20, 2001
    Inventors: Olli Talvitie, Urpo Nokkonen, Jane Lehtil, Antti Hentinen, Risto Pirhonen, Jukka Eerikinen