Patents by Inventor Steven M. Havlik

Steven M. Havlik 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).

  • System, apparatus, and method for driving light emitting diodes in low voltage circuits
    Patent number: 6995518
    Abstract: A system, apparatus, and method for allowing LED operation in circuits operating with power supply levels that are below the forward voltage limits of the LED. A first level of a modulated voltage signal is applied to charge a voltage increasing component in a first phase of operation. A second level of the modulated voltage signal is then summed with the voltage stored across the voltage increasing component to provide adequate forward potential across Light Emitting Diode (LED) for illumination. The second level of modulated voltage is also used to provide a source of constant forward current to be conducted by LED when in its luminescent state.
    Type: Grant
    Filed: October 3, 2003
    Date of Patent: February 7, 2006
    Assignee: Honeywell International Inc.
    Inventors: Steven M. Havlik, Ernest F. Horning