Patents by Inventor Jefferey B. Sampsell

Jefferey B. Sampsell 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).

  • Color phase control for projection display using spatial light modulator
    Patent number: 5657099
    Abstract: A SLM-based projection display system (10) samples and processes video data for delivery to a spatial light modulator (SLM) (13c), and uses a color wheel (14a) to color the SLM-generated images. A frame memory (13b) provides data to the SLM (13c) and is managed so that, if the phase of the incoming video signal changes, a desired phase relationship between the color wheel position and the data available to the SLM (13c) can be maintained. Also, a motor control unit (15a) uses a horizontal sync signal to generate a drive signal for the color wheel motor (16a), which limits the transient time during phase-changing events, and which provides a means for adjusting the phase of the drive signal.
    Type: Grant
    Filed: August 1, 1995
    Date of Patent: August 12, 1997
    Assignee: Texas Instruments Incorporated
    Inventors: Donald B. Doherty, Richard C. Meyer, Stephen W. Marshall, Jefferey B. Sampsell, Robert J. Gove