Patents by Inventor Kyung-hee Kim

Kyung-hee Kim 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: 7208255
    Abstract: A color toner composition for developing latent electrostatic images includes nanopowder-coated toner particles, the powder-coated toner particles being characterized in that each comprises a core toner particle having a volume average diameter, Dp, and the core toner particles have affixed to their surfaces a plurality of discrete colorant powder particles having a volume average diameter, dp, wherein the ratio of Dp/dp is at least about 5 and the weight fraction of colorant powder particles is at least about 0.01 based on the combined weight of core toner particles and colorant powder particles. Preferably, the weight fraction of colorant powder particles is from about 0.3 to about 3 times the product, (?p/?r) (d/r) (1+d/r)2, where ?p is the density of the colorant powder particles, ?r the density of the core resin particles, d, the volumetric mean diameter of the colorant powder particles and r the volumetric mean radius of the toner core resin particles.
    Type: Grant
    Filed: April 22, 2004
    Date of Patent: April 24, 2007
    Assignee: DPI Solutions, Incorporated
    Inventors: Chul-Hwan Kim, Kyung Hee Kim, Eui Joon Choi, Hyun-Nam Yoon
  • Patent number: 7180771
    Abstract: A circuit and method for programming phase-change memory devices, such as chalcogenide memory (PRAM), are described. The invention is directed to an approach to programming PRAM elements from a reset state to a set state or from a set state to the set state. The invention provides a novel and nonobvious PRAM device and method in which a set pulse duration time is controlled by monitoring the state of the memory element during programming such as by comparing the voltage of a bit line with a reference voltage or comparing the cell resistance with a set state cell resistance. The duration of the set pulse is controlled in response to the detected state of the memory element. The result of the approach of the invention is the significant reduction in PRAM programming errors, such as those caused by a constant-duration set pulse, as well as reduction in programming time duration and power consumption.
    Type: Grant
    Filed: April 18, 2006
    Date of Patent: February 20, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Woo-yeong Cho, Kyung-hee Kim
  • Publication number: 20060181932
    Abstract: A circuit and method for programming phase-change memory devices, such as chalcogenide memory (PRAM), are described. The invention is directed to an approach to programming PRAM elements from a reset state to a set state or from a set state to the set state. The invention provides a novel and nonobvious PRAM device and method in which a set pulse duration time is controlled by monitoring the state of the memory element during programming such as by comparing the voltage of a bit line with a reference voltage or comparing the cell resistance with a set state cell resistance. The duration of the set pulse is controlled in response to the detected state of the memory element. The result of the approach of the invention is the significant reduction in PRAM programming errors, such as those caused by a constant-duration set pulse, as well as reduction in programming time duration and power consumption.
    Type: Application
    Filed: April 18, 2006
    Publication date: August 17, 2006
    Inventors: Woo-yeong Cho, Kyung-hee Kim
  • Patent number: 7085154
    Abstract: A circuit and method for programming phase-change memory devices, such as chalcogenide memory (PRAM), are described. The invention is directed to an approach to programming PRAM elements from a reset state to a set state or from a set state to the set state. The invention provides a novel and nonobvious PRAM device and method in which a set pulse duration time is controlled by monitoring the state of the memory element during programming such as by comparing the voltage of a bit line with a reference voltage or comparing the cell resistance with a set state cell resistance. The duration of the set pulse is controlled in response to the detected state of the memory element. The result of the approach of the invention is the significant reduction in PRAM programming errors, such as those caused by a constant-duration set pulse, as well as reduction in programming time duration and power consumption.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: August 1, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Woo-yeong Cho, Kyung-hee Kim
  • Publication number: 20040246804
    Abstract: A circuit and method for programming phase-change memory devices, such as chalcogenide memory (PRAM), are described. The invention is directed to an approach to programming PRAM elements from a reset state to a set state or from a set state to the set state. The invention provides a novel and nonobvious PRAM device and method in which a set pulse duration time is controlled by monitoring the state of the memory element during programming such as by comparing the voltage of a bit line with a reference voltage or comparing the cell resistance with a set state cell resistance. The duration of the set pulse is controlled in response to the detected state of the memory element. The result of the approach of the invention is the significant reduction in PRAM programming errors, such as those caused by a constant-duration set pulse, as well as reduction in programming time duration and power consumption.
    Type: Application
    Filed: February 6, 2004
    Publication date: December 9, 2004
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Woo-yeong Cho, Kyung-hee Kim
  • Patent number: 6481051
    Abstract: A vertical rotation shaft assembly for a swing-arm type door having a door plane and a cylinder for actuating the door includes an upper rotational shaft extended from the cylinder as a piston rod and a lower rotational shaft inserted into an edge of the door plane, the lower rotational shaft being coaxially arranged with the upper rotational shaft.
    Type: Grant
    Filed: August 30, 2000
    Date of Patent: November 19, 2002
    Assignee: Hyundai Motor Company
    Inventor: Kyung-Hee Kim
  • Patent number: 4804323
    Abstract: A melody producing candle in which an Integrated Circuit (IC) placed within the candle is activated upon kindling of the wick to produce music. The candle stops playing music once the flame is put out. The invention is provided with a light reflector which allows adjustment of sensitivity of the candle to light.
    Type: Grant
    Filed: November 18, 1986
    Date of Patent: February 14, 1989
    Inventor: Kyung-Hee Kim