Patents by Inventor Greg S. Pettitt

Greg S. Pettitt 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).

  • Neutral density color filters
    Patent number: 6879451
    Abstract: The present application describes embodiments of a neutral density color wheel filter. According to one embodiment, a neutral density color wheel (100) includes an opaque coating (135) over one or more color segments (120, 130, 140, 150, 160, 170) with randomly placed transmissive regions (131). The transmissive regions (131) can be configured to substantially transmit incident light and the opaque coating (135) can be configured to substantially block or absorb the incident light. Alternatively, the transmissive regions (131) can be configured to substantially transmit the incident light. The color segments with opaque coating (135) and transmissive regions (131) substantially eliminate light recycling due to the reflection from the color wheel. The light transmission from the color wheel (100) is independent of the optics of a display system.
    Type: Grant
    Filed: January 7, 2004
    Date of Patent: April 12, 2005
    Assignee: Texas Instruments Incorporated
    Inventors: Gregory J. Hewlett, Steven M. Penn, Greg S. Pettitt, Dana F. Segler, Jr.