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).
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Patent number: 8884857Abstract: 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: GrantFiled: June 14, 2013Date of Patent: November 11, 2014Assignee: Dell Products, LPInventors: Eugen Munteanu, Stefan Peana, John M. Knadler
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Publication number: 20130342517Abstract: 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: ApplicationFiled: June 14, 2013Publication date: December 26, 2013Inventors: Eugen Munteanu, Stefan Peana, John M. Knadler
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Patent number: 8466864Abstract: 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: GrantFiled: October 8, 2008Date of Patent: June 18, 2013Assignee: Dell Products, LPInventors: Eugen Munteanu, Stefan Peana, John M. Knadler, IV
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Patent number: 8384734Abstract: 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: GrantFiled: April 6, 2010Date of Patent: February 26, 2013Assignee: Dell Products, LPInventors: John M. Knadler, Eugen Munteanu, Jack D. Conway
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Publication number: 20110242127Abstract: 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: ApplicationFiled: April 6, 2010Publication date: October 6, 2011Applicant: DELL PRODUCTS, LPInventors: John M. Knadler, Eugen Munteanu, Jack D. Conway
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Patent number: 7773397Abstract: 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: GrantFiled: June 29, 2007Date of Patent: August 10, 2010Assignee: Dell Products L.P.Inventors: John M. Knadler, IV, Eugen Munteanu
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Publication number: 20100085289Abstract: 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: ApplicationFiled: October 8, 2008Publication date: April 8, 2010Applicant: DELL PRODUCTS, LPInventors: Eugen Munteanu, Stefan Peana, John M. Knadler, IV
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Publication number: 20090003023Abstract: 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: ApplicationFiled: June 29, 2007Publication date: January 1, 2009Applicant: DELL PRODUCTS L.P.Inventors: John M. Knadler, IV, Eugen Munteanu