Patents by Inventor Lars B. G. Odlen

Lars B. G. Odlen 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).

  • Incandescent matrix display with high frequency lamp driving
    Patent number: 4894645
    Abstract: The present invention relates to an electronic sign with a number of light bulbs provided in rows and columns (so called matrix), whereby said bulbs (L) are turned on row by row or column by column (so called multiplex operation). For increasing the life of the bulbs (L), said bulbs (L) are operated by alternating current at high frequency.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: January 16, 1990
    Assignee: Prisma Skyltreklam AB
    Inventor: Lars B. G. Odlen