Patents by Inventor Chung-Hui Kuo

Chung-Hui Kuo 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: 9057978
    Abstract: A composite color toner image can be enhanced in a printed receiver material by having a separate fluorescing magenta toner image applied over it to provide a “pinkish” fluorescing effect. This separate fluorescing magenta toner image is obtained using visible fluorescing dry magenta toner particles, each of which has a polymeric binder phase and a visible fluorescing colorant that emits at one or more peak wavelengths of from 510 nm and to and including 590 nm. The covering power of the fused visible fluorescing magenta toner particles in the enhanced composite color toner image is at least 350 cm2/g to and including 1100 cm2/g, and the covering power of each of the non-fluorescing cyan, non-fluorescing yellow, non-fluorescing magenta, and non-fluorescing black toner particles in the enhanced composite color toner image is at least 1500 cm2/g to and including 2300 cm2/g.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: June 16, 2015
    Assignee: EASTMAN KODAK COMPANY
    Inventors: Dinesh Tyagi, Louise Granica, Chung-Hui Kuo
  • Patent number: 9030516
    Abstract: Compensation is performed for nonuniformity in a printer. The printer has a photoreceptor and a print head with a plurality of different light sources, each light source capable of producing a plurality of different levels of light. A plurality of stored gain control signals for each light source are related to the light output of that light source. Print job data includes screened pixel levels and a halftone screen specification. The stored gain control signals are adjusted based on the halftone screen specification. The screened pixel levels are modified using the adjusted gain control signals to provide engine pixel levels. Those levels are provided to corresponding light sources to expose the photoreceptor in respective pixel areas with light corresponding to the compensated pixel levels.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: May 12, 2015
    Assignee: Eastman Kodak Company
    Inventors: Stacy M. Munechika, Chung-Hui Kuo, Hwai-Tzuu Tai, Stephen J. Famand
  • Patent number: 9008527
    Abstract: A method for calibrating specialty toner, the method includes providing a substrate; depositing an invariant or substantially invariant laydown of a color toner on the substrate; depositing a varying laydown of the specialty toner; fusing the color toner and specialty toner to the substrate; measuring a color response signal of the substrate, color toner, and specialty toner; calculating a color response curve as function of the varying laydown of the specialty toner; comparing the color response curve to a target color response curve; and modifying printing parameters of the specialty toner to set the color response curve equal to or substantially equal to the target color response curve.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: April 14, 2015
    Assignee: Eastman Kadak Company
    Inventors: Chung-Hui Kuo, Michael Wu
  • Publication number: 20150086913
    Abstract: A fluorescing yellow polymeric toner particle comprises one or more non-fluorescing yellow colorants, and one or more fluorescing yellow colorants having one or more emission peak wavelengths of at least 480 nm and up to and including 600 nm. These fluorescing yellow polymeric toner particles can be used to provide multicolor toner images with increased yellow color gamut on various printed receiver materials.
    Type: Application
    Filed: December 3, 2014
    Publication date: March 26, 2015
    Inventors: Dinesh Tyagi, Chung-Hui Kuo, Louise Granica
  • Patent number: 8936893
    Abstract: A fluorescing yellow polymeric toner particle comprises one or more non-fluorescing yellow colorants, and one or more fluorescing yellow colorants having one or more emission peak wavelengths of at least 480 nm and up to and including 600 nm. These fluorescing yellow polymeric toner particles can be used to provide multicolor toner images with increased yellow color gamut.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 20, 2015
    Assignee: Eastman Kodak Company
    Inventors: Dinesh Tyagi, Chung-Hui Kuo, Louise Granica
  • Patent number: 8936897
    Abstract: A composite color toner image can be enhanced by applying a separate fluorescing toner image over it to provide an enhanced color toner image having a “pinkish” fluorescing effect. This separate fluorescing toner image is obtained using visible fluorescing dry magenta toner particles. Each of these toner particles consists essentially of a polymeric binder phase and a visible fluorescing colorant that emits at one or more peak wavelengths of at least 510 nm and up to and including 590 nm and that is dispersed within the polymeric binder phase.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: January 20, 2015
    Assignee: Eastman Kodak Company
    Inventors: Dinesh Tyagi, Louise Granica, Chung-Hui Kuo
  • Publication number: 20140369701
    Abstract: A method for calibrating specialty toner, the method includes providing a substrate; depositing an invariant or substantially invariant laydown of a color toner on the substrate; depositing a varying laydown of the specialty toner; fusing the color toner and specialty toner to the substrate; measuring a color response signal of the substrate, color toner, and specialty toner; calculating a color response curve as function of the varying laydown of the specialty toner; comparing the color response curve to a target color response curve; and modifying printing parameters of the specialty toner to set the color response curve equal to or substantially equal to the target color response curve.
    Type: Application
    Filed: June 14, 2013
    Publication date: December 18, 2014
    Inventors: CHUNG-HUI KUO, Michael Wu
  • Publication number: 20140320927
    Abstract: A method for determining color separation image data for printing for an ink jet printer. Target colors are determined as a function of location in accordance with the image data, and color separation image data is determined specifying amounts of a fluorescent ink and one or more non-fluorescent reflective inks to be combined to form the target colors when printed on an ink receiver. For target colors having a specified hue angle the amount of the fluorescent ink is decreased as a density of the target color increases beyond a threshold density level.
    Type: Application
    Filed: April 26, 2013
    Publication date: October 30, 2014
    Inventors: Chung-Hui Kuo, Dinesh Tyagi
  • Publication number: 20140272339
    Abstract: A fluorescing yellow polymeric toner particle comprises one or more non-fluorescing yellow colorants, and one or more fluorescing yellow colorants having one or more emission peak wavelengths of at least 480 nm and up to and including 600 nm. These fluorescing yellow polymeric toner particles can be used to provide multicolor toner images with increased yellow color gamut.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventors: Dinesh Tyagi, Chung-Hui Kuo, Louise Granica
  • Patent number: 8824907
    Abstract: Electrophotographic (EP) streaking compensation is performed. A tonescale is measured for each column and a per-column gain computed to compensate for variations. An adjustment tonescale is determined and a per-column adjustment-tonescale gain computed to correct for remaining error after the per-column gain is applied. The two corrections are used together to provide improved compensation quality.
    Type: Grant
    Filed: October 10, 2011
    Date of Patent: September 2, 2014
    Assignee: Eatsman Kodak Company
    Inventors: Chung-Hui Kuo, Stephen J. Farnand, Shawn Edward O'Hara, Stacy M. Munechika
  • Patent number: 8805217
    Abstract: Methods are provided for determining toner colors to be combined to form a target color at a location on a receiver. In one aspect, a method includes determining a fluorescent toner color to be provided at the location based upon the density and hue angle of the target color; determining one or more reflective toner colors to be provided with the determined fluorescent toner color at the location to form the target color and the amount of the fluorescent toner color is decreased as the target color density increases.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: August 12, 2014
    Assignee: Eastman Kodak Company
    Inventors: Chung-Hui Kuo, Dinesh Tyagi
  • Publication number: 20140212642
    Abstract: A composite color toner image can be enhanced in a printed receiver material by having a separate fluorescing magenta toner image applied over it to provide a “pinkish” fluorescing effect. This separate fluorescing magenta toner image is obtained using visible fluorescing dry magenta toner particles, each of which has a polymeric binder phase and a visible fluorescing colorant that emits at one or more peak wavelengths of from 510 nm and to and including 590 nm. The covering power of the fused visible fluorescing magenta toner particles in the enhanced composite color toner image is at least 350 cm2/g to and including 1100 cm2/g, and the covering power of each of the non-fluorescing cyan, non-fluorescing yellow, non-fluorescing magenta, and non-fluorescing black toner particles in the enhanced composite color toner image is at least 1500 cm2/g to and including 2300 cm2/g.
    Type: Application
    Filed: March 28, 2014
    Publication date: July 31, 2014
    Inventors: Dinesh Tyagi, Louise Granica, Chung-Hui Kuo
  • Patent number: 8760719
    Abstract: Systems are provided for determining toner color having a processor that generates a fluorescent toner color image that when printed using a corresponding fluorescent toner will generate a diffuse fluorescent color light that reduces the extent to which noise induced variations in density in a noise evident portion of a toner print are observable. The processor further adjusts reflective toner color images used to form the toner print so that the reflective toner color images combine with the fluorescent color image to form a target color image.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: June 24, 2014
    Assignee: Eastman Kodak Company
    Inventors: Dinesh Tyagi, Chung-Hui Kuo
  • Patent number: 8755699
    Abstract: Methods for determining toner color images are provided in which fluorescent toner is used create light in a fused toner mass that reduces the appearance of noise in a noise evident portion of the fused toner mass.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: June 17, 2014
    Assignee: Eastman Kodak Company
    Inventors: Chung-Hui Kuo, Dinesh Tyagi
  • Patent number: 8749800
    Abstract: A system with for capturing and storing an image of a user's handwritten alphanumeric characters. The characters are stored in memory in association with a standard alphanumeric character set such as an ASCII character set. A text document can then be transcribed into the stored handwritten alphanumeric characters for resembling a handwriting of the user. The characters can be represented by mathematical functions such as Taylor Series or McLauren Series and can be digitally reproduced based on the stored functions.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: June 10, 2014
    Assignee: Eastman Kodak Company
    Inventors: Donald S. Rimai, Chung-Hui Kuo
  • Patent number: 8749845
    Abstract: Systems for determining toner colors to be combined to form a target color at a location on a receiver. In one aspect, a system has a processor that determines a fluorescent toner color to be provided at the location based upon the density and hue angle of the target color and that determines one or more reflective toner colors to be provided with the determined fluorescent toner color at the location to form the target color in which the amount of the fluorescent toner color is decreased as the target color density increases.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: June 10, 2014
    Assignee: Eastman Kodak Company
    Inventors: Chung-Hui Kuo, Dinesh Tyagi
  • Patent number: 8736894
    Abstract: Correction data is produced for density errors in prints produced using a printer. While printing a test image, the periods of rotation of one or more rotatable imaging members arranged along a receiver feed path in the printer are measured using respective period sensors. The printed test image is measured along a selected measurement direction and a reproduction error signal representing deviation from aim density is determined. For each period sensor, the autocorrelation of the reproduction error signal for the corresponding period is determined. If the determined autocorrelation exceeds a selected threshold, the reproduction error signal is decomposed at the corresponding period to extract the variation from the measured component. The remaining error signal is separated by frequency terms. The variations from the data at measured periods and the remaining error signal are used to produce a correction signal.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: May 27, 2014
    Assignee: Eastman Kodak Company
    Inventors: Chung-Hui Kuo, Hwai-Tzuu Tai, Stacy M. Munechika, Jerry Eugene Livadas
  • Publication number: 20140037338
    Abstract: Toner prints with efficiently enhanced gamut are provided. In one aspect a toner print comprises a receiver and a toner image fused to the receiver. The toner image has a first area with a first density at a first hue angle formed by a first amount of a fluorescent toner colorant at the first area; and, a second area with a second density at the first hue angle formed by a second amount of the fluorescent toner color that is lower than the first amount of fluorescent toner colorant. The second density is greater than the first density.
    Type: Application
    Filed: July 31, 2012
    Publication date: February 6, 2014
    Inventors: Dinesh Tyagi, Chung-Hui Kuo
  • Publication number: 20140037306
    Abstract: Methods for determining toner color images are provided in which fluorescent toner is used create light in a fused toner mass that reduces the appearance of noise in a noise evident portion of the fused toner mass.
    Type: Application
    Filed: July 31, 2012
    Publication date: February 6, 2014
    Inventors: Chung-Hui Kuo, Dinesh Tyagi
  • Publication number: 20140036281
    Abstract: Systems for determining toner colors to be combined to form a target color at a location on a receiver. In one aspect, a system has a processor that determines a fluorescent toner color to be provided at the location based upon the density and hue angle of the target color and that determines one or more reflective toner colors to be provided with the determined fluorescent toner color at the location to form the target color in which the amount of the fluorescent toner color is decreased as the target color density increases.
    Type: Application
    Filed: July 31, 2012
    Publication date: February 6, 2014
    Inventors: Chung-Hui Kuo, Dinesh Tyagi