Patents by Inventor Il-kwon Chang

Il-kwon Chang 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).

  • Publication number: 20230309622
    Abstract: An electromagnetic induction heating apparatus for heating an aerosol-forming article of an electronic cigarette includes: a power supply unit configured to supply DC power; a power amplifier including a switch unit composed of a pair of transistor switches having a differential structure and operating by receiving the DC power from the power supply unit, and a LC resonant network composed of a resonant inductor connected to an output terminal of the switch unit and electromagnetically inductively coupled with an inductor component of a heat-generating body for heating the aerosol-forming article of the electronic cigarette and a resonant capacitor connected in parallel to the resonant inductor; and a driving unit configured to adjust an operation of the power amplifier to adjust a temperature of the heat-generating body.
    Type: Application
    Filed: March 24, 2023
    Publication date: October 5, 2023
    Applicants: SILICON MITUS, INC., Hangzhou Silicon-Magic Semiconductor Technology Co., Ltd.
    Inventors: Jun Ho Moon, Il Kwon Chang, Sung Jin Park
  • Patent number: 9418320
    Abstract: An apparatus for detecting an object includes a filter for filtering a current input image and a background model generated based on a previous input image, a homography matrix estimation unit for estimating a homography matrix between the current input image and the background model, an image alignment unit for converting the background model by applying the homography matrix to a filtered background model and aligning a converted background model and a filtered current input image, and a foreground/background detection unit for detecting a foreground by comparing corresponding pixels between the converted background model and the filtered current input image.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: August 16, 2016
    Assignees: Seoul National University Industry Foundation, Hanwha Techwin Co., Ltd.
    Inventors: Il-Kwon Chang, Jeong-Eun Lim, Soo-Wan Kim, Sun-Jung Kim, Kwang Moo Yi, Ki-Min Yun, Jin Young Choi
  • Patent number: 9230176
    Abstract: A method of detecting camera tempering and a system therefor are provided. The method includes: performing at least one of following operations: (i) detecting a size of a foreground in an image, and determining whether a first condition, that the size exceeds a first reference value, is satisfied, (ii) detecting change of a sum of the largest pixel value differences among pixel value differences between adjacent pixels in selected horizontal lines of the image, according to time, and determining whether a second condition, that the change lasts for a predetermined time period, is satisfied, and (iii) adding up a plurality of global motion vectors with respect to a plurality of images, and determining whether a third condition, that a sum of the global motion vectors exceeds a second reference value, is satisfied; and determining occurrence of camera tempering if at least one of the corresponding conditions is satisfied.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: January 5, 2016
    Assignee: Hanwha Techwin Co., Ltd.
    Inventors: Eun-Ji Choi, Jeong-Eun Lim, Il-Kwon Chang
  • Patent number: 9076268
    Abstract: A method and a system for analyzing multi-channel images are provided. The method includes: receiving a plurality of images through a plurality of channels, respectively; combining selected images among the plurality of images into a single image; and performing an image analysis with respect to: entirety of the combined image by treating the selected images as a single image; or each of the selected images in the combined image.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: July 7, 2015
    Assignee: SAMSUNG TECHWIN CO., LTD.
    Inventors: Eun-Ji Choi, Jeong-Eun Lim, Il-Kwon Chang
  • Patent number: 8648420
    Abstract: A semiconductor device includes an input/output pad, and a data transfer unit configured to form a parasitic diode between the input/output pad and a power supply terminal thereof to discharge an introduced electrostatic discharge (ESD), and form a data transfer path between the input/output pad and an internal circuit in response to a control signal.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: February 11, 2014
    Assignee: Magnachip Semiconductor, Ltd.
    Inventors: Young-Chul Kim, Il-Kwon Chang, Ji-Ho Lew, Kyoung-Sik Kim, So-Youn Kim
  • Patent number: 8648637
    Abstract: A slew rate boost circuit for an output buffer and an output buffer circuit for a source driver having the same are provided. In an output buffer including a pull-up unit providing a buffer output signal in a first level by receiving a buffer input signal and performing pull-up operation and a pull-down unit providing a buffer output signal in a second level having opposite phase from the first level by receiving the buffer input signal and performing pull-down operation, the slew rate boost circuit includes a first comparator generating a first boost signal to boost pull-up operation of the pull-up unit of the output buffer by inputting a first input signal and a second input signal and a second comparator generating a second boost signal to boost pull-down operation of the pull-down unit of the output buffer by inputting the first input signal and the second input signal.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: February 11, 2014
    Assignee: MagnaChip Semiconductor, Ltd.
    Inventors: Min-sung Kim, Il-kwon Chang, Ji-ho Lew, Young-chul Kim, Joon-yul Yun, Don-woo Lee, So-youn Kim, Kyung-won Min, Jae-hoon Lee
  • Publication number: 20130236120
    Abstract: A method and a system for analyzing multi-channel images are provided. The method includes: receiving a plurality of images through a plurality of channels, respectively; combining selected images among the plurality of images into a single image; and performing an image analysis with respect to: entirety of the combined image by treating the selected images as a single image; or each of the selected images in the combined image.
    Type: Application
    Filed: March 11, 2013
    Publication date: September 12, 2013
    Applicant: SAMSUNG TECHWIN CO., LTD.
    Inventors: Eun-Ji CHOI, Jeong-Eun LIM, Il-Kwon CHANG
  • Patent number: 8436919
    Abstract: A photographing method of generating an image of a traced moving path and a photographing apparatus using the photographing method are provided. The photographing apparatus includes an image processing unit which captures a plurality of still images regarding an object, obtains state information about a state of the photographing apparatus at time points corresponding to the plurality of still images, respectively, and synthesizes the plurality of still images into an image based on the state information.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: May 7, 2013
    Assignee: Samsung Techwin Co., Ltd.
    Inventor: Il-kwon Chang
  • Publication number: 20110157427
    Abstract: A photographing method of generating an image of a traced moving path and a photographing apparatus using the photographing method are provided. The photographing apparatus includes an image processing unit which captures a plurality of still images regarding an object, obtains state information about a state of the photographing apparatus at time points corresponding to the plurality of still images, respectively, and synthesizes the plurality of still images into an image based on the state information.
    Type: Application
    Filed: August 25, 2010
    Publication date: June 30, 2011
    Applicant: SAMSUNG TECHWIN CO., LTD.
    Inventor: Il-kwon CHANG
  • Publication number: 20110001824
    Abstract: A sensing apparatus determines a location and a direction where a display and an event are sensed, and causes a separate event to occur based on the location and the direction where the event is sensed. Accordingly, a user may set a direction where the event is sensed on a photographed screen more easily and conveniently.
    Type: Application
    Filed: May 7, 2010
    Publication date: January 6, 2011
    Applicant: Samsung Techwin Co., Ltd.
    Inventor: Il-kwon CHANG
  • Patent number: 7612788
    Abstract: For generating source line voltages in a display device, gray scale data is received at a source driver for a first sub-pixel of a pixel. The source driver generates a first source line voltage for the first sub-pixel and a second source line voltage for a second sub-pixel from the gray scale data of the first sub-pixel. Thus, data transfer rate and/or data buses are minimized for in turn minimizing power consumption and EMI (electromagnetic interference).
    Type: Grant
    Filed: August 22, 2005
    Date of Patent: November 3, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Il-Kwon Chang, Yong-Weon Jeon
  • Patent number: 7609191
    Abstract: A digital/analog converting driver and a digital/analog converting method, in which the digital/analog converting driver converts digital data having M+N (M and N are integers) bits into an analog voltage and includes a first converting unit, a second converting unit, and an analog voltage outputting unit. The first converting unit converts successive M bits of the digital data into a first voltage. The second converting unit converts successive N bits of the digital data into a second voltage. The analog voltage outputting unit adds the first voltage and the second voltage and outputs the added voltage as the analog voltage. The output range of the first voltage is different from that of the second voltage.
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: October 27, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Il-Kwon Chang, Yong-Weon Jeon, Ji-Woon Jung
  • Publication number: 20080309538
    Abstract: A digital/analog converting driver and a digital/analog converting method, in which the digital/analog converting driver converts digital data having M+N (M and N are integers) bits into an analog voltage and includes a first converting unit, a second converting unit, and an analog voltage outputting unit. The first converting unit converts successive M bits of the digital data into a first voltage. The second converting unit converts successive N bits of the digital data into a second voltage. The analog voltage outputting unit adds the first voltage and the second voltage and outputs the added voltage as the analog voltage. The output range of the first voltage is different from that of the second voltage.
    Type: Application
    Filed: November 6, 2006
    Publication date: December 18, 2008
    Inventors: Il-Kwon Chang, Yong-Weon Jeon, Ji-Woon Jung
  • Patent number: 7436214
    Abstract: A pseudo differential current mode receiver includes a regulated cascode buffer for buffering a received data current to generate a buffered data current with cascode-reduced input impedance and cascode-increased output impedance. In addition, a signal converter generates an output signal indicating a difference between the buffered data current and a reference current. The reference current may also be received and buffered by a regulated cascode buffer with cascode-reduced input impedance and cascode-increased output impedance.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: October 14, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Il-Kwon Chang, Yong-Weon Jeon
  • Patent number: 7355543
    Abstract: A digital-to-analog converter using capacitors and an operational amplifier, which can be highly integrated due to its small area and which can rapidly perform a stable converting operation. The digital-to-analog converter includes a data input unit, a first conversion unit, a second conversion unit, and a signal output unit. When digital data is input to the data input unit, the data input unit is connected to the first conversion unit or the second conversion unit. The first conversion unit charges a first charging capacitor with a voltage corresponding to the input digital data and distributes the charged charges to a first distribution capacitor. The second conversion unit charges a second charging capacitor with the voltage corresponding to the input digital data and distributes the charged charges to a second distribution capacitor.
    Type: Grant
    Filed: November 8, 2006
    Date of Patent: April 8, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Il Kwon-Chang, Min-Gwang Kang
  • Publication number: 20080049104
    Abstract: A video acquirement apparatus to acquire a video signal of monitoring area, to convert the acquired video signal into a differential video signal and a network stream, and to transmit the converted signal to a repeater apparatus using a UTP cable. The repeater apparatus supplies power to the video acquirement apparatus using the UTP cable, and receives the differential video signal and the network stream from the video acquirement apparatus. If network condition is unsatisfactory, the repeater apparatus outputs the received differential video signal to a video recording apparatus using one UTP cable. The video recording apparatus converts the output differential video signal using one UTP cable into a general video signal, and variably amplifies and records the converted general video signal.
    Type: Application
    Filed: August 20, 2007
    Publication date: February 28, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Il-kwon CHANG
  • Patent number: 7310005
    Abstract: Provided are a receiver and a transceiver for multi-level current-mode signaling, which together may reduce the number of bus lines and increase a data bandwidth. A transmitter transmits one reference current and a multi-level data current. On the basis of the reference current signal received from the transmitter, a receiver generates plural internal reference currents for determining the multi-level data current received from the transmitter, and converting the received multi-level data current into a data voltage having the desired level corresponding to the data that was transmitted.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: December 18, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Il-Kwon Chang, Yong-Weon Jeon, Kyung-Wol Kim
  • Patent number: 7279985
    Abstract: A regulated cascode amplifier includes a main cascode amplifier and a feed-back amplifier. The main cascode amplifier has an input transistor coupled in a stack with an output transistor at an input control node. The feed-back amplifier including a plurality of transistors with gates of the transistors being coupled together to the input control node and with drains of the transistors being coupled together at a gate of the output transistor. The transistors of the feed-back amplifier are biased from connections to the main cascode amplifier for smaller chip area.
    Type: Grant
    Filed: February 7, 2005
    Date of Patent: October 9, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Il-Kwon Chang, Yong-Weon Jeon
  • Publication number: 20070194964
    Abstract: A digital-to-analog converter using capacitors and an operational amplifier, which can be highly integrated due to its small area and which can rapidly perform a stable converting operation. The digital-to-analog converter includes a data input unit, a first conversion unit, a second conversion unit, and a signal output unit. When digital data is input to the data input unit, the data input unit is connected to the first conversion unit or the second conversion unit. The first conversion unit charges a first charging capacitor with a voltage corresponding to the input digital data and distributes the charged charges to a first distribution capacitor. The second conversion unit charges a second charging capacitor with the voltage corresponding to the input digital data and distributes the charged charges to a second distribution capacitor.
    Type: Application
    Filed: November 8, 2006
    Publication date: August 23, 2007
    Inventors: Il-Kwon Chang, Min-Gwang Kang
  • Patent number: 7259742
    Abstract: A source driving circuit for a display device may include a first latch configured to store first video data corresponding to a first horizontal line and a second latch configured to store second video data corresponding to a second horizontal line following the first horizontal line. The first and second latches may alternately store video data of different horizontal lines. The source driving circuit may further include a digital-to-analog converter (DAC) configured to convert the stored first and second video data into analog signals, a first sample-and-hold circuit configured to sample and store an output signal of the DAC, a second sample-and-hold circuit configured to sample and store an output signal of the first sample-and-hold circuit, and an output switch configured to provide an output signal of the second sample-and-hold circuits to the display panel.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: August 21, 2007
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Il-Kwon Chang, Yong-Weon Jeon