Patents by Inventor John P. Shepherd

John P. Shepherd 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: 7492404
    Abstract: An image sensor includes a substrate; a plurality of pixels on the substrate, one or more of the pixels comprises (i) first and second charge-storage regions having at least one photosensitive area; (ii) a lateral overflow drain; (iii) a first lateral overflow gate adjacent the first charge-storage regions that passes substantially all charges from the first charge-storage region to the lateral overflow drain; and (iv) a second lateral gate adjacent the second charge-storage region that passes excess photo-generated charge into the lateral overflow drain for blooming control.
    Type: Grant
    Filed: February 7, 2005
    Date of Patent: February 17, 2009
    Assignee: Eastman Kodak Company
    Inventors: Eric G. Stevens, John P. Shepherd, David N. Nichols
  • Patent number: 7423668
    Abstract: A method for calibrating an image sensor having multiple outputs, the method includes the steps of capturing an image on the image sensor, injecting one or more substantially identical pairs of signals into corresponding portions of the captured image, reading out the captured image with the injected signals into two or more outputs, and comparing two substantially identical signals from corresponding portions of the image, which comparison is used for calibrating the image.
    Type: Grant
    Filed: July 11, 2005
    Date of Patent: September 9, 2008
    Assignee: Eastman Kodak Company
    Inventors: Eric J. Meisenzahl, Edward T. Nelson, John P. Shepherd
  • Patent number: 7298407
    Abstract: A method for reducing shutter latency while maintaining low dark current in the imager and minimizing energy consumption in a digital camera, the method including the steps of providing an imager operating in accumulation mode; and substantially continuous flushing of charges from the imager before capturing an exposure of an image with a time between vertical transfers greater than or equal to time between vertical transfers during normal image readout so that, if continuous flushing for a time necessary to readout substantially all rows of pixels has occurred, the exposure may be captured with substantially zero latency.
    Type: Grant
    Filed: October 10, 2002
    Date of Patent: November 20, 2007
    Assignee: Eastman Kodak Company
    Inventors: Gregory O. Moberg, John P. Shepherd, Raymond J. Bouvy, John P. McCarten
  • Patent number: 7274391
    Abstract: A digital camera includes a CCD operating with accumulation mode clocking for capturing an electronic representation of an image; and two or more clocks operatively and respectively connected to each phase of the two or more phases for initiating flushing of excess current, wherein, to initiate flushing, a time the clocks are at a high level are substantially the same, and a time the clocks are at a low level can be selected at any duration between a minimum width at which dark current starts to substantially increase and twice its normal operating duration during image readout and for reducing power consumption while retaining minimum dark current and for having a substantially uniform dark field.
    Type: Grant
    Filed: October 10, 2002
    Date of Patent: September 25, 2007
    Assignee: Eastman Kodak Company
    Inventors: John P. Shepherd, Eric J. Meisenzahl, Richard Brolly
  • Patent number: 6803960
    Abstract: An optically operated test structure for testing the charge transfer efficiency (CTE) of a charge coupled device (CCD) solid-state image sensor. A solid-state image sensor includes a substrate of a semiconductor material of one conductivity type having a surface. A plurality of spaced, parallel CCDs are in the substrate at the surface. Each CCD includes a channel region and a plurality of conductive gates extending across and insulated from the channel region. The conductive gates extend laterally across the channel regions of all of the CCDs and divide the channel regions into a plurality of phases and pixels. A drain region of the opposite conductivity type is in the substrate at the surface and extends along the channel region of at least one of the CCDs. A simply connected (rectangular) region of the plurality of spaced, parallel CCDs is photoactive. The CCDs outside this photoactive region are typically covered with metal or some other optically opaque material.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: October 12, 2004
    Assignee: Eastman Kodak Company
    Inventors: John P. Shepherd, Eric G. Stevens
  • Publication number: 20030133031
    Abstract: A method for reducing shutter latency while maintaining low dark current in the imager and minimizing energy consumption in a digital camera, the method including the steps of providing an imager operating in accumulation mode; and substantially continuous flushing of charges from the imager before capturing an exposure of an image with a time between vertical transfers greater than or equal to time between vertical transfers during normal image readout so that, if continuous flushing for a time necessary to readout substantially all rows of pixels has occurred, the exposure may be captured with substantially zero latency.
    Type: Application
    Filed: October 10, 2002
    Publication date: July 17, 2003
    Applicant: Eastman Kodak Company
    Inventors: Gregory O. Moberg, John P. Shepherd, Raymond J. Bouvy, John P. McCarten
  • Publication number: 20030133026
    Abstract: A digital camera includes a CCD operating with accumulation mode clocking for capturing an electronic representation of an image; and two or more clocks operatively and respectively connected to each phase of the two or more phases for initiating flushing of excess current, wherein, to initiate flushing, a time the clocks are at a high level are substantially the same, and a time the clocks are at a low level can be selected at any duration between a minimum width at which dark current starts to substantially increase and twice its normal operating duration during image readout and for reducing power consumption while retaining minimum dark current and for having a substantially uniform dark field.
    Type: Application
    Filed: October 10, 2002
    Publication date: July 17, 2003
    Applicant: Eastman Kodak Company
    Inventors: John P. Shepherd, Eric J. Meisenzahl, Richard Brolly
  • Publication number: 20010043274
    Abstract: An optically operated test structure for testing the charge transfer efficiency (CTE) of a charge coupled device (CCD) solid-state image sensor. A solid-state image sensor includes a substrate of a semiconductor material of one conductivity type having a surface. A plurality of spaced, parallel CCDs are in the substrate at the surface. Each CCD includes a channel region and a plurality of conductive gates extending across and insulated from the channel region. The conductive gates extend laterally across the channel regions of all of the CCDs and divide the channel regions into a plurality of phases and pixels. A drain region of the opposite conductivity type is in the substrate at the surface and extends along the channel region of at least one of the CCDs.
    Type: Application
    Filed: December 14, 2000
    Publication date: November 22, 2001
    Inventors: John P. Shepherd, Eric G. Stevens
  • Patent number: 5298735
    Abstract: A laser diode having an output facet and a back facet is placed in contact with a designated edge of a die and oriented such that said output facet is substantially parallel to said top surface of said die. At least one photodetector is fabricated on the dye top surface.
    Type: Grant
    Filed: October 7, 1992
    Date of Patent: March 29, 1994
    Assignee: Eastman Kodak Company
    Inventors: David L. Peterson, James G. Phalen, John P. Shepherd, Gilbert A. Hawkins