Patents by Inventor John M. Knadler

John M. Knadler 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: 8884857
    Abstract: A field-sequential display is operated in one of a color mode or a grayscale mode. In the color mode, a video source provides image content in the form of multiple-color image data having a frame rate of X Hz and a display controller uses the multiple-color image data to drive the field-sequential display so as provide multiple-color image content at the field-sequential display. In the grayscale mode, the display controller generates grayscale image data from the multiple-color image data and the display controller then drives the field-sequential display with the grayscale image data at a lower frame rate of Y Hz. While in the grayscale mode, the display controller can take advantage of the enhanced contrast provided by the grayscale image content to reduce or disable backlighting at the field-sequential display. The reduced timing requirements afforded by the lower frame rate, as well as the reduction or elimination of backlighting, can reduce power consumption compared to the color mode.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: November 11, 2014
    Assignee: Dell Products, LP
    Inventors: Eugen Munteanu, Stefan Peana, John M. Knadler
  • Publication number: 20130342517
    Abstract: A field-sequential display is operated in one of a color mode or a grayscale mode. In the color mode, a video source provides image content in the form of multiple-color image data having a frame rate of X Hz and a display controller uses the multiple-color image data to drive the field-sequential display so as provide multiple-color image content at the field-sequential display. In the grayscale mode, the display controller generates grayscale image data from the multiple-color image data and the display controller then drives the field-sequential display with the grayscale image data at a lower frame rate of Y Hz. While in the grayscale mode, the display controller can take advantage of the enhanced contrast provided by the grayscale image content to reduce or disable backlighting at the field-sequential display. The reduced timing requirements afforded by the lower frame rate, as well as the reduction or elimination of backlighting, can reduce power consumption compared to the color mode.
    Type: Application
    Filed: June 14, 2013
    Publication date: December 26, 2013
    Inventors: Eugen Munteanu, Stefan Peana, John M. Knadler
  • Patent number: 8466864
    Abstract: A field-sequential display is operated in one of a color mode or a grayscale mode. In the color mode, a video source provides image content in the form of multiple-color image data having a frame rate of X Hz and a display controller uses the multiple-color image data to drive the field-sequential display so as provide multiple-color image content at the field-sequential display. In the grayscale mode, the display controller generates grayscale image data from the multiple-color image data and the display controller then drives the field-sequential display with the grayscale image data at a lower frame rate of Y Hz. While in the grayscale mode, the display controller can take advantage of the enhanced contrast provided by the grayscale image content to reduce or disable backlighting at the field-sequential display. The reduced timing requirements afforded by the lower frame rate, as well as the reduction or elimination of backlighting, can reduce power consumption compared to the color mode.
    Type: Grant
    Filed: October 8, 2008
    Date of Patent: June 18, 2013
    Assignee: Dell Products, LP
    Inventors: Eugen Munteanu, Stefan Peana, John M. Knadler, IV
  • Patent number: 8384734
    Abstract: A method for implementing a user selectable white level includes displaying a default white patch of a default shade of white on a display, displaying a modified white patch of a modified shade of white that is different than the default shade of white on the display, receiving a selection of the modified white patch, associating another default shade of white with the modified shade of white in response to receiving the selection, receiving pixel data for a pixel, the pixel data comprising color information for displaying the default shade of white, and displaying the pixel with the second default shade of white.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: February 26, 2013
    Assignee: Dell Products, LP
    Inventors: John M. Knadler, Eugen Munteanu, Jack D. Conway
  • Publication number: 20110242127
    Abstract: A method for implementing a user selectable white level includes displaying a default white patch of a default shade of white on a display, displaying a modified white patch of a modified shade of white that is different than the default shade of white on the display, receiving a selection of the modified white patch, associating another default shade of white with the modified shade of white in response to receiving the selection, receiving pixel data for a pixel, the pixel data comprising color information for displaying the default shade of white, and displaying the pixel with the second default shade of white.
    Type: Application
    Filed: April 6, 2010
    Publication date: October 6, 2011
    Applicant: DELL PRODUCTS, LP
    Inventors: John M. Knadler, Eugen Munteanu, Jack D. Conway
  • Patent number: 7773397
    Abstract: Methods and systems for controlling a power inverter are provided. In accordance with one embodiment, a system for converting a direct current into an alternating current may include a switching module, a sensing module, and a control module. The switching module may have an input and an output, and may be operable to receive a direct current at the input and to generate at the output a corresponding alternating current with a desired output characteristic. The sensing module may be coupled to the switching module output, and may be operable to sense a power factor associated with a load coupled to the switching module output. The control module may be coupled to the power inverter and the sensing module, and may be operable to control the desired output characteristic based at least on the sensed power factor.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: August 10, 2010
    Assignee: Dell Products L.P.
    Inventors: John M. Knadler, IV, Eugen Munteanu
  • Publication number: 20100085289
    Abstract: A field-sequential display is operated in one of a color mode or a grayscale mode. In the color mode, a video source provides image content in the form of multiple-color image data having a frame rate of X Hz and a display controller uses the multiple-color image data to drive the field-sequential display so as provide multiple-color image content at the field-sequential display. In the grayscale mode, the display controller generates grayscale image data from the multiple-color image data and the display controller then drives the field-sequential display with the grayscale image data at a lower frame rate of Y Hz. While in the grayscale mode, the display controller can take advantage of the enhanced contrast provided by the grayscale image content to reduce or disable backlighting at the field-sequential display. The reduced timing requirements afforded by the lower frame rate, as well as the reduction or elimination of backlighting, can reduce power consumption compared to the color mode.
    Type: Application
    Filed: October 8, 2008
    Publication date: April 8, 2010
    Applicant: DELL PRODUCTS, LP
    Inventors: Eugen Munteanu, Stefan Peana, John M. Knadler, IV
  • Publication number: 20090003023
    Abstract: Methods and systems for controlling a power inverter are provided. In accordance with one embodiment, a system for converting a direct current into an alternating current may include a switching module, a sensing module, and a control module. The switching module may have an input and an output, and may be operable to receive a direct current at the input and to generate at the output a corresponding alternating current with a desired output characteristic. The sensing module may be coupled to the switching module output, and may be operable to sense a power factor associated with a load coupled to the switching module output. The control module may be coupled to the power inverter and the sensing module, and may be operable to control the desired output characteristic based at least on the sensed power factor.
    Type: Application
    Filed: June 29, 2007
    Publication date: January 1, 2009
    Applicant: DELL PRODUCTS L.P.
    Inventors: John M. Knadler, IV, Eugen Munteanu