Patents by Inventor N. Jack Gregory

N. Jack Gregory 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).

  • Bandpass filter to reduce thermal impact of dichroic light shift
    Patent number: 6549338
    Abstract: A color splitting prism assembly (100) comprised of three prisms. Each a dichroic filter at an interface (112) between a first and second of the three prisms reflects a first primary color component of a white light beam passing through the prism assembly. The first primary color component is directed to a first modulator (118). The remaining portions of the white light beam enter a second prism (108) and strike a second dichroic filter at the interface between (124) the second and third prisms. The second dichroic filter separates a second primary color component from the white light beam leaving a third primary color component to travel through the third prism (110) to a third modulator. The second primary color component of the white light beam is directed to a second modulator (128).
    Type: Grant
    Filed: November 7, 2000
    Date of Patent: April 15, 2003
    Assignee: Texas Instruments Incorporated
    Inventors: Gary Wolverton, Duane Scott Dewald, N. Jack Gregory, Roger Carver