Patents by Inventor Peter F. VanKessel

Peter F. VanKessel 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).

  • Patent number: 8717394
    Abstract: A method and system providing boundary dispersion to pixel values displayed on a binary spatial light modulator to reduce temporal contouring artifacts. Pixel code values are offset from a nominal value when displayed on the SLM to disperse a large bit transition for a pulse width modulation (PWM) system. The offset value varies as a function of the pixel digital code, the pixel spatial location on the screen, and pixel temporal location in time. The set of offsets applied to pixels is varied over a repeating sequence of 2 displayed frames.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: May 6, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Daniel J. Morgan, Gregory J. Hewlett, Peter F. vanKessel
  • Publication number: 20090021540
    Abstract: A method and system providing boundary dispersion to pixel values displayed on a binary spatial light modulator to reduce temporal contouring artifacts. Pixel code values are offset from a nominal value when displayed on the SLM to disperse a large bit transition for a pulse width modulation (PWM) system. The offset value varies as a function of the pixel digital code, the pixel spatial location on the screen, and pixel temporal location in time. The set of offsets applied to pixels is varied over a repeating sequence of 2 displayed frames.
    Type: Application
    Filed: July 21, 2008
    Publication date: January 22, 2009
    Applicant: Texas Instruments Incorporated
    Inventors: Daniel J. Morgan, Gregory J. Hewlett, Peter F. VanKessel
  • Patent number: 7403213
    Abstract: A method and system providing boundary dispersion to pixel values displayed on a binary spatial light modulator to reduce temporal contouring artifacts. Pixel code values are offset from a nominal value when displayed on the SLM to disperse a large bit transition for a pulse width modulation (PWM) system. The offset value varies as a function of the pixel digital code, the pixel spatial location on the screen, and pixel temporal location in time. The set of offsets applied to pixels is varied over a repeating sequence of 2 displayed frames.
    Type: Grant
    Filed: June 2, 1998
    Date of Patent: July 22, 2008
    Assignee: Texas Instruments Incorporated
    Inventors: Daniel J. Morgan, Gregory J. Hewlett, Peter F. VanKessel
  • Patent number: 6226054
    Abstract: A method for performing pulse width modulation (PWM) on a binary spatial light modulator using spatial-temporal multiplexing. A 10% light boost is achieved by eliminating deadtimes that are typically generated using the global-reset operation of a DMD when bit-planes having small on times are utilized. The number of bit-planes required is reduced by using a combination of binary and ternary bit-planes to achieve grayscale of a displayed digital image. By using a combination of spatial and temporal processing, digital pixel values can be displayed using a reduced number of bit-planes, without generating perceived artifacts such as pulsing due to pixels being turned on-off from frame to frame.
    Type: Grant
    Filed: June 2, 1998
    Date of Patent: May 1, 2001
    Assignee: Texas Instruments Incorporated
    Inventors: Daniel J. Morgan, Gregory J. Hewlett, Peter F. VanKessel
  • Patent number: 5912758
    Abstract: A method of resetting the cells of a spatial light modulator (FIG. 11). A saturation voltage pulse is applied, causing the cells to achieve a fully saturated state in a given amount of time. A reset pulse of opposite polarization than the saturation voltage pulse is then applied, driving the cells toward the opposite fully saturated state. The reset pulse is removed after the same amount of time, causing the cells to assume their relaxed state in the same amount of time it took them to achieve their fully saturated state.
    Type: Grant
    Filed: April 13, 1998
    Date of Patent: June 15, 1999
    Assignee: Texas Instruments Incorporated
    Inventors: Richard L. Knipe, Peter F. Vankessel