Patents by Inventor Dana J. Segler, Jr.

Dana J. Segler, Jr. 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).

  • High contrast projection
    Patent number: 7182469
    Abstract: A method and system for improving the contrast ratio of a projected image. An asymmetric aperture stop improves the contrast ratio of a projected image. Using slightly offset projection, the majority of the on-state projection light from the modulator array passes through a region that is not centered in the projection lens pupil. The blocked region of the asymmetric aperture is oriented toward the illumination path and away from the specular reflection path. The asymmetric aperture is able to block a significant portion of the diffracted light using the blocked region, without blocking much of the desired projection light passing through the remainder of the aperture. The result is that dark regions of the image become significantly darker, while light regions remain about the same. The same effect occurs without offset illumination.
    Type: Grant
    Filed: September 15, 2003
    Date of Patent: February 27, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: D. Scott Dewald, Steven M. Penn, Dana J. Segler, Jr.
  • Reduction or moiré effect in pixelated rear-projection displays
    Patent number: 6905215
    Abstract: An apparatus and method for reducing the moiré effect in rear-projection displays by rotating the dark-stripe structure (711, 712) in the screen (71) 45±15 degrees relative to the displayed pixel structure. By rotating the dark-stripes (711) relative to the displayed pixels, the spatial frequency at which the moiré effect sets in can be improved by 15% to 41%.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: June 14, 2005
    Assignee: Texas Instruments Incorporated
    Inventors: Dana J. Segler, Jr., Adam J. Kunzman
  • Reduction of moire effect in pixelated rear-projection displays
    Patent number: 6709113
    Abstract: An apparatus and method for reducing the moiré effect in rear-projection displays by rotating the dark-stripe structure (711, 712) in the screen (71) 45±15 degrees relative to the displayed pixel structure. By rotating the dark-stripes (711) relative to the displayed pixels, the spatial frequency at which the moiré effect sets in can be improved by 15% to 41%.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: March 23, 2004
    Assignee: Texas Instruments Incorporated
    Inventors: Dana J. Segler, Jr., Adam J. Kunzman
  • High contrast projection
    Patent number: 6637894
    Abstract: A method and system for improving the contrast ratio of a projected image. An asymmetric aperture stop within a lens is used to provide a 20-30% improvement in the contrast ratio of a projected image when used with offset projection. Using slightly offset projection, the majority of the on-state projection light from the modulator array passes through a region (512) that is not centered in the projection lens pupil. The blocked region (504) of the asymmetric aperture is oriented toward the illumination path (510) and away from the specular reflection path (508). The asymmetric aperture (502) is able to block a significant portion of the diffracted light using the blocked region (504), without blocking much of the desired projection light passing through the remainder of the aperture. The result is that dark regions of the image become significantly darker, while light regions remain about the same. The same effect occurs without the offset illumination shown in FIG. 3, but to a lesser extent.
    Type: Grant
    Filed: March 5, 2002
    Date of Patent: October 28, 2003
    Assignee: Texas Instruments Incorporated
    Inventors: D. Scott Dewald, Steven M. Penn, Dana J. Segler, Jr.