Patents by Inventor Woo Seok Choi

Woo Seok Choi 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: 20180097983
    Abstract: An electronic device includes a lens part that receives light from a subject, an image sensor that receives the light of the lens part from a group of pixels arranged two-dimensionally, and an processor that processes an image signal of the image sensor. The image sensor performs a read-out operation at a speed to prevent blurring of an image. The processor temporarily stores image data by the read-out operation in a memory, loads a plurality of images stored in the memory to generate an image, of which the number of bits is expanded compared with the image signal of the image sensor, and performs gamma processing on the image, of which the number of bits is expanded, to generate an image compressed to the same number of bits as the image signal of the image sensor.
    Type: Application
    Filed: September 29, 2017
    Publication date: April 5, 2018
    Inventors: Jae Hyoung PARK, Byung Ho KIM, Jae Joon MOON, Jeong Won LEE, Han Sung KIM, Woo Seok CHOI, Shuichi SHIMOKAWA, Takafumi USUI
  • Patent number: 9932433
    Abstract: Provided are a method for preparing a nitrile-based rubber having an amount of ethylenically unsaturated nitrile of 34 wt % or less including preparing a polymer by performing a polymerization reaction by adding an ethylenically unsaturated nitrile-based monomer in two or more portions to a conjugated diene-based monomer, and coagulating the polymer by adding a sulfur-based coagulant to the polymer, and a nitrile-based rubber thus prepared having improved mechanical properties as well as excellent processability and low temperature characteristics.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: April 3, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Jae Min Lee, Se Eun Lee, Byoung Yun Kim, In Sung Jo, Woo Seok Choi
  • Publication number: 20170369684
    Abstract: The present invention relates to a method for preparing a low styrene-butadiene rubber having a low combined styrene content and, more particular, to a method for preparing a low styrene-butadiene rubber, wherein the low styrene-butadiene rubber contributes to an excellent polymerization rate and vulcanization rate by using an aliphatic organic acid and a sulfonate based compound as emulsifiers, and is excellent in heat stability after blending, thereby improving the workability and viscosity in in roll processing, such that the low styrene-butadiene rubber is advantageous to produce a molded article with improved rigidity and hardness when mixed with a high styrene-butadiene rubber.
    Type: Application
    Filed: November 25, 2016
    Publication date: December 28, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Se Eun Lee, Byoung Yun Kim, In Sung Jo, Jae Min Lee, Woo Seok Choi
  • Patent number: 9848116
    Abstract: A solid-state image sensor of an electronic device includes a plurality of pixels arranged in a matrix form and having a plurality of phase difference pixel of the plurality of pixels. The plurality of phase difference pixels are arranged at locations of pixels that are commonly read out in a plurality of different skip readout modes.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: December 19, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Shuichi Shimokawa, Dong-min Kim, Sang-min Lee, Kwi-sung Yoo, Seung-hyun Lim, Woo-seok Choi, Beoung-ouk Min, Takafumi Usui
  • Patent number: 9826174
    Abstract: An image processing apparatus and method are provided. In the method, an image sensor including first pixels for detecting an image and second pixels for detecting a different type of signals, reads out values from at least one of the second pixels and at least one the first pixels, based on a predetermined rule, outputs a first sampling image, based on the read out pixels, restores values of the at least one of the second pixels to be image pixel values for locations of the at least one of the second pixels included in the first sampling image, outputs a restored image based on the restored values, performs binning on pixels of the restored image using a predetermined method; and outputs a reduced resolution image with a resolution reduced at a predetermined rate from the restored image, based on the binning.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: November 21, 2017
    Assignee: Samsung Electronics Co., Ltd
    Inventor: Woo-Seok Choi
  • Publication number: 20170226253
    Abstract: Provided are a method for preparing a nitrile-based rubber having an amount of ethylenically unsaturated nitrile of 34 wt % or less including preparing a polymer by performing a polymerization reaction by adding an ethylenically unsaturated nitrile-based monomer in two or more portions to a conjugated diene-based monomer, and coagulating the polymer by adding a sulfur-based coagulant to the polymer, and a nitrile-based rubber thus prepared having improved mechanical properties as well as excellent processability and low temperature characteristics.
    Type: Application
    Filed: June 5, 2015
    Publication date: August 10, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Jae Min Lee, Se Eun Lee, Byoung Yun Kim, In Sung Jo, Woo Seok Choi
  • Publication number: 20170163873
    Abstract: A photographing apparatus for automatically detecting a focus via a phase difference detection scheme, the photographing apparatus including an image sensor comprising a plurality of phase difference pixels and configured to acquire an image of a subject; an addition processor configured to add output signals of the plurality of phase difference pixels; a controller configured to detect the focus of the image based on output signals of the plurality of phase difference pixels, and to set an addition range of the plurality of phase difference pixels added by the addition processor based on information of the detected focus and information of the acquired image of the subject.
    Type: Application
    Filed: July 19, 2016
    Publication date: June 8, 2017
    Inventors: Il-do KIM, Jeong-won LEE, Woo-seok CHOI
  • Publication number: 20170077522
    Abstract: Methods for tailoring an oxygen defect concentration, such as oxygen vacancies, in a transition metal oxide and the resulting materials are provided. An epitaxial strain, such as in the form of a biaxial tensile strain of up to 5%, is applied to the transition metal oxide to increase the oxygen defect concentration in the transition metal oxide to result in a product comprising the transition metal oxide having an increased oxygen defect concentration.
    Type: Application
    Filed: September 12, 2016
    Publication date: March 16, 2017
    Applicant: UT-BATTELLE, LLC
    Inventors: Gyula ERES, Ho Nyung LEE, Fernando A. REBOREDO, Woo Seok CHOI, John W. FREELAND, Hyoung Jeen JEEN, Tricia L. MEYER, Chandrima MITRA, Jonathan R. PETRIE
  • Patent number: 9571089
    Abstract: A built-in gate driver includes a shift register provided in a non-display area of a panel, and configured to include first to gth stages outputting a scan signal, a clock supply line part configured to include m number of clock supply lines connected to the shift register, and a power supply line part configured to include n number of power supply lines connected to the shift register. At least one of the lines of the clock supply lines and the power supply lines are in a first side direction of the shift register, and the other at least one or more lines of the clock supply lines and the power supply lines are in a second side direction of the shift register.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: February 14, 2017
    Assignee: LG Display Co., Ltd.
    Inventors: Yong Ho Jang, Woo Seok Choi
  • Publication number: 20170026558
    Abstract: A digital photographing apparatus includes: an image sensor including a first pixel group and a second pixel group each pixel group including a plurality of pixels for generating an imaging signal by photoelectrically converting incident light, the image sensor being configured to acquire the imaging signal two or more times in the second pixel group and to acquire the imaging signal once in the first pixel group; and a processor configured to acquire an image in which a motion of a subject appears based on the imaging signal acquired by the image sensor, and to generate a motion-corrected image based on the imaging signal acquired in the second pixel group.
    Type: Application
    Filed: January 20, 2016
    Publication date: January 26, 2017
    Inventors: Jae-hyoung PARK, Woo-seok CHOI
  • Patent number: 9550166
    Abstract: Rapid, reversible redox activity may be accomplished at significantly reduced temperatures, as low as about 200° C., from epitaxially stabilized, oxygen vacancy ordered SrCoO2.5 and thermodynamically unfavorable perovskite SrCoO3-?. The fast, low temperature redox activity in SrCoO3-? may be attributed to a small Gibbs free energy difference between the two topotactic phases. Epitaxially stabilized thin films of strontium cobaltite provide a catalyst adapted to rapidly transition between oxidation states at substantially low temperatures. Methods of transitioning a strontium cobaltite catalyst from a first oxidation state to a second oxidation state are described.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: January 24, 2017
    Assignee: UT-BATTELLE, LLC
    Inventors: Ho Nyung Lee, Hyoungjeen Jeen, Woo Seok Choi, Michael Biegalski, Chad M. Folkman, I-Cheng Tung, Dillon D. Fong, John W. Freeland, Dongwon Shin, Hiromichi Ohta, Matthew F. Chisholm
  • Publication number: 20170011525
    Abstract: An image capturing apparatus includes: a first camera module and a second camera module having different optical characteristics and configured to capture a same subject; and a controller configured to set a region including the subject as a first region of interest (ROI) in a first image captured by the first camera module and to detect a second ROI matching the first ROI in a second image captured by the second camera module, based on a difference in optical characteristics of the first camera module and optical characteristics of the second camera module.
    Type: Application
    Filed: December 30, 2015
    Publication date: January 12, 2017
    Inventors: Il-do KIM, Woo-seok CHOI
  • Publication number: 20170004760
    Abstract: Discussed are a built-in gate driver capable of improving output characteristics of the gate driver by reducing load of clock lines and a display device using the same. The built-in gate driver can include a shift register, a first clock group and a second clock group located in a non-display region of a display panel. The shift register includes a plurality of stages for individually driving gate lines of a display region. The first clock group includes clock lines arranged at a first side of the shift register. The second clock group includes clock lines arranged at a second side of the shift register. Each of the clock lines includes a main line and a branch line branched from the main line and connected to a corresponding stage. A branch line belonging to a corresponding clock group of any one of the first and second clock groups does not overlap a main line belonging to the other clock group.
    Type: Application
    Filed: June 17, 2016
    Publication date: January 5, 2017
    Applicant: LG Display Co., Ltd.
    Inventors: Yong-Ho JANG, Woo-Seok CHOI
  • Publication number: 20160253976
    Abstract: Disclosed is a shift register capable of preventing charges supplied to a Q node to turn on a pull-up transistor for outputting a scan pulse from leaking outwards. The shift register includes a plurality of stages connected to gate lines formed at a panel. Each stage includes a scan signal generator for generating a scan pulse or a turn-off signal, a scan pulse controller for generating a Q-node control signal for generation of the scan pulse, a Q-node adjuster for preventing the Q-node control signal from leaking outwards during supply of the Q-node control signal to a Q-node connected to the scan signal generator, and a turn-off signal controller for transferring a Qb-node control signal for generation of the turn-off signal to the scan signal generator via a Qb-node when no scan pulse is generated from the scan signal generator.
    Type: Application
    Filed: August 25, 2015
    Publication date: September 1, 2016
    Inventors: Yong-Ho JANG, Woo-Seok CHOI
  • Publication number: 20160137489
    Abstract: A microelectromechanical systems (MEMS) device includes: a circuit board; a lower cap disposed on the circuit board; a case disposed on the lower cap and having an internal space; a rotating part rotatably mounted in the case; an upper cap disposed on the case and including a reinforcing part disposed above a axis of the rotating part; and a molding layer encasing the lower cap, the case, and the upper cap.
    Type: Application
    Filed: October 22, 2015
    Publication date: May 19, 2016
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jong Woon KIM, Won HAN, Woo Seok CHOI
  • Publication number: 20160042526
    Abstract: An imaging apparatus is provided, which includes an image sensor which includes a plurality of image pixels and a plurality of sensing pixels, and is configured to capture images through collection of light that is incident through a lens and the plurality of phase sensing pixels; and a processor configured to divide a region of interest of the image sensor into a plurality of sub-regions of interest, calculate disparity information of objects that correspond to the plurality of sub-regions of interest using at least one of the plurality of phase sensing pixels included in the plurality of sub-regions of interest, and determine a focal region in the region of interest on the basis of the disparity information. Accordingly, user convenience is increased.
    Type: Application
    Filed: August 10, 2015
    Publication date: February 11, 2016
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jeong-won LEE, Kwon-jeong KANG, Byung-ho KIM, Woo-seok CHOI, Il-do KIM
  • Patent number: 9214868
    Abstract: A power supply device is provided. The power supply device includes: a transformer configured to include first and second windings; a half bridge circuit configured to be connected to first and second nodes and both ends of the first wiring; and a full bridge circuit configured to be connected to third and fourth nodes and both ends of the second winding. Since the leakage inductance of the transformer and the bridge capacitor of the half bridge circuit form a direct current (DC) resonant tank, switching loss that may occur during the turning on or off of switches can be reduced.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: December 15, 2015
    Assignees: LG INNOTEK CO., LTD., Industry Foundation of Chonnam National University
    Inventors: Chunfeng Jin, Sung Jun Park, Woo Seok Choi
  • Publication number: 20150237253
    Abstract: A solid-state image sensor of an electronic device includes a plurality of pixels arranged in a matrix form and having a plurality of phase difference pixel of the plurality of pixels. The plurality of phase difference pixels are arranged at locations of pixels that are commonly read out in a plurality of different skip readout modes.
    Type: Application
    Filed: December 24, 2014
    Publication date: August 20, 2015
    Inventors: Shuichi Shimokawa, Dong-min Kim, Sang-min Lee, Kwi-sung Yoo, Seung-hyun Lim, Woo-seok Choi, Beoung-ouk Min, Takafumi Usui
  • Patent number: 9060118
    Abstract: Image sensors include an array of image sensor pixels therein. This array of image sensor pixels includes a first focus detection pixel and at least a first color pixel. A switching network is provided, which is electrically coupled to the array. This switching network may be configured to generate a first mixed image signal by electronically mixing a focus detection signal generated by the first focus detection pixel with at least one color pixel signal generated by the at least a first color pixel. The first focus detection pixel can be a color-blind pixel, which may include a light-blocking shield mask therein.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: June 16, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin Hun Shin, Ji Min Cheon, Dong Hun Lee, Hyeok Jong Lee, Jin Ho Seo, Woo Seok Choi, Seog Heon Ham
  • Publication number: 20150148218
    Abstract: Rapid, reversible redox activity may be accomplished at significantly reduced temperatures, as low as about 200° C., from epitaxially stabilized, oxygen vacancy ordered SrCoO2.5 and thermodynamically unfavorable perovskite SrCoO3-?. The fast, low temperature redox activity in SrCoO3-? may be attributed to a small Gibbs free energy difference between the two topotactic phases. Epitaxially stabilized thin films of strontium cobaltite provide a catalyst adapted to rapidly transition between oxidation states at substantially low temperatures. Methods of transitioning a strontium cobaltite catalyst from a first oxidation state to a second oxidation state are described.
    Type: Application
    Filed: November 26, 2013
    Publication date: May 28, 2015
    Inventors: Ho Nyung Lee, Hyoungjeen Jeen, Woo Seok Choi, Michael Biegalski, Chad M. Folkman, I-Cheng Tung, Dillon D. Fong, John W. Freeland, Dongwon Shin, Hiromichi Ohta, Matthew F. Chisholm