Patents by Inventor Cathy Biber

Cathy Biber 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).

  • Control for projector lamp heat dissipation
    Patent number: 6472828
    Abstract: A portable image projector is provided with a fan having a control system for cooling a metal-halide arc lamp. The arc lamp cooling system of the present invention includes a fan having a fan control to operate the fan at an initially reduced level during lamp start-up to allow the temperature of the arc lamp to increase to its full operating temperature. The fan control includes a microcontroller to operate the fan at a reduced voltage over a period of time after which the voltage is increased to operate the fan at full capacity. Power to the fan may be increased in incremental time steps or linearly over a period of time as determined by the microcontroller.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: October 29, 2002
    Assignee: InFocus Corporation
    Inventors: Henry Frazier Pruett, Fred Parker, Roger Yaffe, Jeff Gohman, Cathy Biber