Patents by Inventor Vadlammanti Venkateswar

Vadlammanti Venkateswar 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).

  • Gray scale printing using spatial light modulators
    Patent number: 5461410
    Abstract: A method for gray scale printing combining row integration and pulse width modulation. A spatial light modulator (102) has one line (104) designated to perform PWM within a given line time. Another area of the modulator (106) has lines designated to perform row integration on the print image, allowing for more gray levels. An additional area (108) can be designated to correct for defects in the illumination profile and the printed images.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: October 24, 1995
    Assignee: Texas Instruments Incorporated
    Inventors: Vadlammanti Venkateswar, James St. Clair, William E. Nelson
  • Process and architecture for digital micromirror printer
    Patent number: 5461411
    Abstract: Techniques for achieving high resolution, high-speed gray scale printing with binary spatial light modulators. A spatial light modulator array is divided into subarrays, and the subarrays are illuminated at various levels (510, 512, 514, 516) of a modulated light source. Additionally, each pixel (520) can be divided up into four phases and printed in phase pairs.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: October 24, 1995
    Assignees: Texas Instruments Incorporated, Agfa-Gevaert N.V.
    Inventors: James M. Florence, William E. Nelson, Vadlammanti Venkateswar, James St. Clair, Dirk Broddin, Serge M. F. Tavernier