Patents by Inventor Kae-Dal Kwack

Kae-Dal Kwack 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: 8816944
    Abstract: A display device, which includes a plurality of pixels; a data driver for outputting data signals to the pixels; a bias current outputting unit for outputting a bias current having a predetermined magnitude; a plurality of driving current outputting units for outputting driving currents to the pixels; and a first switch connected between the bias current outputting unit and the driving current outputting units for selecting one of the driving current outputting units to connect to the bias current outputting unit, wherein the magnitudes of the driving currents are substantially the same as a magnitude of the bias current.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: August 26, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Tae-Whan Kim, Kae-Dal Kwack, Hong-Jae Shin
  • Patent number: 8760960
    Abstract: A semiconductor memory apparatus includes: a first bit line of to a first memory bank; a first middle input/output line configured to be electrically connected to the first bit line; a second bit line of a second memory bank; a second middle input/output line configured to be electrically connected to the second bit line; and a shared local input/output line configured to be electrically connected to the first and second middle input/output lines. A bank selection signal controls both the electrical connection between the shared local input/output line and the first middle input/output line and the electrical connection between the shared local input/output line and the second middle input/output line.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: June 24, 2014
    Assignee: Hynix Semiconductor Inc.
    Inventors: Seung Wook Kwack, Kae Dal Kwack
  • Patent number: 8687424
    Abstract: A flash memory using hot carrier injection and a method of operating the same are provided. A plurality of strings constituting a page are formed on a single p-well and share the p-well. During a program operation, a string selection transistor is turned off, and electrons are accumulated in a source or drain region in response to a bias voltage applied to the p-well. Thereafter, the accumulated electrons are trapped in a charge trap layer of a memory cell in response to a program voltage applied through a word line. Also, during an erase operation, holes accumulated in response to a bias voltage applied to the p-well are trapped in the charge trap layer in response to an erase voltage. The flash memory performs NAND-type program and erase operations using hot carrier injection.
    Type: Grant
    Filed: September 9, 2009
    Date of Patent: April 1, 2014
    Assignee: Intellectual Discovery Co., Ltd.
    Inventors: Han-Sub Yoon, Jong-Suk Lee, Kae-Dal Kwack
  • Publication number: 20120213019
    Abstract: A semiconductor memory apparatus includes: a first bit line of to a first memory bank; a first middle input/output line configured to be electrically connected to the first bit line; a second bit line of a second memory bank; a second middle input/output line configured to be electrically connected to the second bit line; and a shared local input/output line configured to be electrically connected to the first and second middle input/output lines. A bank selection signal controls both the electrical connection between the shared local input/output line and the first middle input/output line and the electrical connection between the shared local input/output line and the second middle input/output line.
    Type: Application
    Filed: April 30, 2012
    Publication date: August 23, 2012
    Applicant: HYNIX SEMICONDUCTOR INC.
    Inventors: Seung Wook KWACK, Kae Dal KWACK
  • Publication number: 20110216595
    Abstract: A flash memory using hot carrier injection and a method of operating the same are provided. A plurality of strings constituting a page are formed on a single p-well and share the p-well. During a program operation, a string selection transistor is turned off, and electrons are accumulated in a source or drain region in response to a bias voltage applied to the p-well. Thereafter, the accumulated electrons are trapped in a charge trap layer of a memory cell in response to a program voltage applied through a word line. Also, during an erase operation, holes accumulated in response to a bias voltage applied to the p-well are trapped in the charge trap layer in response to an erase voltage. The flash memory performs NAND-type program and erase operations using hot carrier injection.
    Type: Application
    Filed: September 9, 2009
    Publication date: September 8, 2011
    Inventors: Han-Sub Yoon, Jong-Suk Lee, Kae-Dal Kwack
  • Patent number: 7927951
    Abstract: A non-volatile memory device includes a semiconductor substrate, first and second control gates, and first and second charge storage patterns. The semiconductor substrate includes a protruding active pin having a source region, a drain region and a channel region located between the source and drain regions. The first control gate is located on a first sidewall of the channel region, and the second control gate is located on a second sidewall of the channel region. The second control gate is separated from the first control gate. The first charge storage pattern is located between the first sidewall and the first control gate, and the second charge storage pattern is located between the second sidewall and the second control gate.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: April 19, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tae-Whan Kim, Kae-Dal Kwack, Sang-Su Park
  • Publication number: 20110085393
    Abstract: A semiconductor memory apparatus includes: a first bit line of to a first memory bank; a first middle input/output line configured to be electrically connected to the first bit line; a second bit line of a second memory bank; a second middle input/output line configured to be electrically connected to the second bit line; and a shared local input/output line configured to be electrically connected to the first and second middle input/output lines. A bank selection signal controls both the electrical connection between the shared local input/output line and the first middle input/output line and the electrical connection between the shared local input/output line and the second middle input/output line.
    Type: Application
    Filed: December 31, 2009
    Publication date: April 14, 2011
    Applicant: HYNIX SEMICONDUCTOR INC.
    Inventors: Seung Wook KWACK, Kae Dal KWACK
  • Publication number: 20110075503
    Abstract: A main decoding circuit includes a shared column selection signal generating unit and a switching unit. The shared column selection signal generating unit receives a column decoding signal to generate a shared column selection signal. The switching unit selectively provides the shared column selection signal to one of a column selection line of a first memory bank and a column selection line of a second memory bank in response to a bank selection signal.
    Type: Application
    Filed: December 31, 2009
    Publication date: March 31, 2011
    Applicant: Hynix Semiconductor Inc.
    Inventors: Seung Wook KWACK, Kae Dal KWACK
  • Publication number: 20110069555
    Abstract: A non-volatile memory device includes a semiconductor substrate, first and second control gates, and first and second charge storage patterns. The semiconductor substrate includes a protruding active pin having a source region, a drain region and a channel region located between the source and drain regions. The first control gate is located on a first sidewall of the channel region, and the second control gate is located on a second sidewall of the channel region. The second control gate is separated from the first control gate. The first charge storage pattern is located between the first sidewall and the first control gate, and the second charge storage pattern is located between the second sidewall and the second control gate.
    Type: Application
    Filed: November 30, 2010
    Publication date: March 24, 2011
    Applicants: Samsung Electronics Co., Ltd., Industry-University Cooperation Foundation, Hanyang-University
    Inventors: Tae-Whan Kim, Kae-Dal Kwack, Sang-Su Park
  • Patent number: 7880661
    Abstract: An on-die thermal sensor includes an integrating analog-digital converter not requiring a negative reference voltage input. The on die thermal sensor includes a band gap unit, an integrating unit and a counting unit. The band gap unit senses a temperature to output a first voltage corresponding to the sensed temperature. The integrating unit integrates a difference between a reference voltage and a comparing voltage to output a second voltage wherein the comparing voltage has a voltage level higher than that of the reference voltage. The counting unit counts clocks of a clock signal input thereto until the second voltage reaches the first voltage, thereby outputting a thermal code corresponding to the voltage level of the first voltage.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: February 1, 2011
    Assignees: Hynix Semiconductor Inc., Industry-University Cooperation Foundation Hanyang University
    Inventors: Chun-Seok Jeong, Jae-Jin Lee, Joong-Sik Kih, Jong-Man Im, Jae-Woong Choi, Myoung-Jun Chai, Kae-Dal Kwack
  • Patent number: 7863673
    Abstract: A non-volatile memory device includes a semiconductor substrate, first and second control gates, and first and second charge storage patterns. The semiconductor substrate includes a protruding active pin having a source region, a drain region and a channel region located between the source and drain regions. The first control gate is located on a first sidewall of the channel region, and the second control gate is located on a second sidewall of the channel region. The second second control gate is separated from the first control gate. The first charge storage pattern is located between the first sidewall and the first control gate, and the second charge storage pattern is located between the second sidewall and the second control gate.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: January 4, 2011
    Assignees: Samsung Electronics Co., Ltd., Industry-University Cooperation Foundation, Hanyang-University
    Inventors: Tae-Whan Kim, Kae-Dal Kwack, Sang-Su Park
  • Patent number: 7706159
    Abstract: A charge pump for a DC-DC converter includes an input terminal receiving an input voltage, an output terminal outputting an output voltage, a plurality of charge pumping stages connected in series between the input terminal and the output terminal, and a voltage level shifter shifting voltage levels of first and second gate clock signals so that received first and second gate clock signals have a predetermined amplitude. Therefore, the charge pump can increase power efficiency by maximizing a magnitude of VGS. A DC-DC converter using the charge pump can also be applied to a portable device, for minimizing power consumption, and a method for improving power efficiency of the DC-DC converter is provided.
    Type: Grant
    Filed: May 26, 2006
    Date of Patent: April 27, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tae-Whan Kim, Kae-Dal Kwack, Hong-Jae Shin
  • Publication number: 20090206385
    Abstract: A non-volatile memory device includes a semiconductor substrate, first and second control gates, and first and second charge storage patterns. The semiconductor substrate includes a protruding active pin having a source region, a drain region and a channel region located between the source and drain regions. The first control gate is located on a first sidewall of the channel region, and the second control gate is located on a second sidewall of the channel region. The second control gate is separated from the first control gate. The first charge storage pattern is located between the first sidewall and the first control gate, and the second charge storage pattern is located between the second sidewall and the second control gate.
    Type: Application
    Filed: February 13, 2009
    Publication date: August 20, 2009
    Applicants: SAMSUNG ELECTRONICS CO., LTD., INDUSTRY-UNIVERSITY COOPERATION FOUNDATION
    Inventors: Tae-Whan KIM, Kae-Dal KWACK, Sang-Su PARK
  • Publication number: 20090108327
    Abstract: Provided may be a gate pattern, flash memory and methods of manufacturing and operating the same. A gate pattern may include a floating gate on a tunneling dielectric layer, an inter-gate dielectric layer on the floating gate, a first control gate on the inter-gate dielectric layer, and a second control gate on the inter-gate dielectric layer and spaced apart from the first control gate. Each of the control gates sets four states according to an application time of a program voltage applied to the control gates. Thus, one control gate may program 2-bit data.
    Type: Application
    Filed: October 24, 2008
    Publication date: April 30, 2009
    Inventors: Tae-Whan Kim, Kyeong-Rock Kim, Kae-Dal Kwack
  • Patent number: 7521978
    Abstract: A clock driver is provided. A first driving unit is configured with a plurality of drivers and receives a first clock signal to drive a first pumping clock. A second driving unit is configured with a plurality of drivers and receives a second clock signal to drive a second pumping clock. A charge recycling switch is connected between an output terminal of the first driving unit and an output terminal of the second driving unit. A switch controller selectively transfers an input clock signal of the first or second driving unit to the charge recycling switch in response to the first and second pumping clock signals.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: April 21, 2009
    Assignee: Hynix Semiconductor Inc.
    Inventors: Dong-Hwan Kim, Si-Nae Kim, Kae-Dal Kwack, Jae-Jin Lee
  • Publication number: 20080180300
    Abstract: An on-die thermal sensor includes an integrating analog-digital converter not requiring a negative reference voltage input. The on die thermal sensor includes a band gap unit, an integrating unit and a counting unit. The band gap unit senses a temperature to output a first voltage corresponding to the sensed temperature. The integrating unit integrates a difference between a reference voltage and a comparing voltage to output a second voltage wherein the comparing voltage has a voltage level higher than that of the reference voltage. The counting unit counts clocks of a clock signal input thereto until the second voltage reaches the first voltage, thereby outputting a thermal code corresponding to the voltage level of the first voltage.
    Type: Application
    Filed: June 29, 2007
    Publication date: July 31, 2008
    Inventors: Chun-Seok Jeong, Jae-Jin Lee, Joong-Sik Kih, Jong-Man Im, Jae-Woong Choi, Myoung-Jun Chai, Kae-Dal Kwack
  • Publication number: 20080122815
    Abstract: A display apparatus includes a display panel; a light source unit including a plurality of first point light sources and a plurality of second point light sources, wherein the point light sources supply light to the display panel; an optical film including a plurality of openings, wherein each opening exposes a first point light source, and is provided between the display panel and the light source unit at a distance from the light source unit; and a light source driver which supplies a driving power to the first point light sources if a three-dimensional image is displayed on the display panel, and supplies the driving power to the second point light sources if a two-dimensional image is displayed on the display panel.
    Type: Application
    Filed: October 3, 2007
    Publication date: May 29, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jung-young SON, Vladimir V. Saveljev, Yong-jin Choi, Hyo-soon Eom, Kae-dal Kwack
  • Publication number: 20070103220
    Abstract: A clock driver is provided. A first driving unit is configured with a plurality of drivers and receives a first clock signal to drive a first pumping clock. A second driving unit is configured with a plurality of drivers and receives a second clock signal to drive a second pumping clock. A charge recycling switch is connected between an output terminal of the first driving unit and an output terminal of the second driving unit. A switch controller selectively transfers an input clock signal of the first or second driving unit to the charge recycling switch in response to the first and second pumping clock signals.
    Type: Application
    Filed: June 29, 2006
    Publication date: May 10, 2007
    Inventors: Dong-Hwan Kim, Si-Nae Kim, Kae-Dal Kwack, Jae-Jin Lee
  • Publication number: 20060290615
    Abstract: A display device, which includes a plurality of pixels; a data driver for outputting data signals to the pixels; a bias current outputting unit for outputting a bias current having a predetermined magnitude; a plurality of driving current outputting units for outputting driving currents to the pixels; and a first switch connected between the bias current outputting unit and the driving current outputting units for selecting one of the driving current outputting units to connect to the bias current outputting unit, wherein the magnitudes of the driving currents are substantially the same as a magnitude of the bias current.
    Type: Application
    Filed: June 15, 2006
    Publication date: December 28, 2006
    Inventors: Tae-Whan Kim, Kae-Dal Kwack, Hong-Jae Shin
  • Publication number: 20060279352
    Abstract: A charge pump for a DC-DC converter includes an input terminal receiving an input voltage, an output terminal outputting an output voltage, a plurality of charge pumping stages connected in series between the input terminal and the output terminal, and a voltage level shifter shifting voltage levels of first and second gate clock signals so that received first and second gate clock signals have a predetermined amplitude. Therefore, the charge pump can increase power efficiency by maximizing a magnitude of VGS. A DC-DC converter using the charge pump can also be applied to a portable device, for minimizing power consumption, and a method for improving power efficiency of the DC-DC converter is provided.
    Type: Application
    Filed: May 26, 2006
    Publication date: December 14, 2006
    Inventors: Tae-Whan Kim, Kae-Dal Kwack, Hong-Jae Shin