Patents by Inventor Ji Hoon Yoo

Ji Hoon Yoo 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: 20160234943
    Abstract: Provided herein is a method for forming a transparent electrode film for display and the transparent electrode film for display, the method comprising forming an electrode pattern by printing a fine electrode pattern on a release film using a conductive ink composition; forming an insulating layer by applying an insulating resin on the release film on which the electrode pattern has been formed; forming a substrate layer by laminating a substrate on the insulating layer; and removing the release film.
    Type: Application
    Filed: April 18, 2014
    Publication date: August 11, 2016
    Applicant: INKTEC CO., LTD.
    Inventors: Kwang-Choon CHUNG, Ji Hoon Yoo, Joonki SEONG, Dae sang Han
  • Publication number: 20160202404
    Abstract: Provided herein is a method for producing a nano polaroid film using a one-pack type or two-pack type blackening ink so that a single layer film may replace a conventional polaroid film generally produced by superposing various types of optical films, and especially, a method for producing a nano polaroid film consisting of one film and having excellent observability by coating a transparent nano pattern substrate with a functional ink that contains a blackening material, and then removing particles formed on protruding portions using an etching solution, and refilling the functional ink into grooves.
    Type: Application
    Filed: June 3, 2014
    Publication date: July 14, 2016
    Inventors: Kwang-Choon CHUNG, Insook YI, MinHee KIM, Ji Hoon YOO
  • Publication number: 20160192477
    Abstract: Provided herein is a method for manufacturing a conductive transparent substrate, the method including forming a plurality of main electrodes on the substrate such that the main electrodes are distanced from one another; and forming a connecting electrode that electrically connects two or more main electrodes such that the plurality of main electrodes are grouped into a plurality of group electrodes that are electrically disconnected from one another, thereby producing a conductive transparent substrate with excellent transmittance in a process of high yield.
    Type: Application
    Filed: July 7, 2014
    Publication date: June 30, 2016
    Inventors: Kwang-Choon Chung, Ji Hoon Yoo, Joonki Seong, Byung Hun Kim, Nam Boo Cho, Myung-Bong Yoo
  • Publication number: 20160181592
    Abstract: Provided herein is a method for forming a transparent electrode film, the method comprising forming an electrode pattern by printing an electrode pattern on a release film using a metal ink composition; forming an insulating layer by applying a curable resin on the release film on which the electrode pattern has been formed; forming a substrate layer by laminating a substrate on the insulating layer; removing the release film; and forming a conductive layer by applying a conductive material on the electrode pattern from which the release film has been removed.
    Type: Application
    Filed: May 16, 2014
    Publication date: June 23, 2016
    Inventors: Kwang-Choon Chung, In-Sook Yi, Ji Hoon Yoo, Joonki Seong, Dae Sang Han
  • Patent number: 9364892
    Abstract: Disclosed herein is a centrifugal casting machine, including: a rotating plate rotating by means of a motor; a cylindrical sleeve installed on the rotating plate and having an internal diameter corresponding to an external diameter of silicon steel plates constituting a core in the sleeve; an upper mold internally installed on the sleeve to define a first molding space into which a molten metal is introduced to mold an end ring; a lower mold internally installed on the sleeve to define a second molding space into which a molten metal is introduced to mold an end ring; a dummy shaft fitted in the center of the core and coupled to the lower mold; a cap coupled to an upper end of the dummy shaft to press the core; and a hydraulic ram coupled to the lower mold to move the lower mold up and down and coupled to the rotating plate to rotate therewith.
    Type: Grant
    Filed: September 4, 2014
    Date of Patent: June 14, 2016
    Assignee: HYUNDAI HEAVY INDUSTRIES CO., LTD.
    Inventors: Ji-Hoon Yoo, Kwang-Jin Han, Sung-Mo Lee, Byoung-Hun Kwon, Deok-Su Kim
  • Publication number: 20160132141
    Abstract: Provided herein is a method for producing a hybrid transparent electrode, the method including filling grooves of a substrate with a conductive metal ink composition; filling the grooves with residue conductive metal ink composition that remains on a surface of the substrate as the grooves are being filled with the conductive metal ink composition to form an electrode pattern; and forming a conductive layer including a conductive material on the electrode pattern.
    Type: Application
    Filed: May 16, 2014
    Publication date: May 12, 2016
    Inventors: Kwang-Choon CHUNG, In-Sook YI, Ji Hoon YOO, Joonki SEONG, Dae sang HAN
  • Publication number: 20160126883
    Abstract: A failure diagnostic apparatus for current sensors of a 3-phase brushless AC (BLAC) motor may include: a 3-phase BLAC motor; current sensors each configured to measure a phase current of the 3-phase BLAC motor; a motor driving unit configured to drive the 3-phase BLAC motor; and a control unit configured to drive the 3-phase BLAC motor through the motor driving unit, periodically calculate a phase current error using the phase current fed back through each of the current sensors, and diagnose that a failure occurred in the current sensor of the corresponding phase, when an error count accumulated during a preset time reaches a preset value, based on the phase current error.
    Type: Application
    Filed: October 29, 2015
    Publication date: May 5, 2016
    Inventor: Ji Hoon YOO
  • Patent number: 9299483
    Abstract: Provided are a method for manufacturing a transparent conductive film and a transparent conductive film manufactured thereby, the method including: a) forming a coating film by coating a transparent conductive film coating solution on a substrate, the transparent conductive film coating solution including a non-polar solvent; a polar solvent; a conductive metal ink; and a surfactant; and b) forming a conductive pattern having a hole type transmissive part and a pattern part formed of the conductive metal ink, on the substrate, by drying and burning the coating film.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: March 29, 2016
    Assignee: Inktec Co., Ltd.
    Inventors: Kwang Choon Chung, Hyun Nam Cho, Ji Hoon Yoo, Yun-Ho Jung
  • Patent number: 9290844
    Abstract: Provided is a method for manufacturing a metal film, including: coating or printing a metal ink containing an organic metal complex on a substrate; and necessarily parallel-performing a pressure process during a procedure of forming metal particles by firing the metal ink, thereby forming a conductive metal film. The present invention can provide a method for manufacturing a metal film capable of improving film characteristics such as conductivity, reflectance, and uniformity in thickness, and the like, as well as remarkably shortening the time for forming the metal film, thereby efficiently manufacturing a superior-quality metal film.
    Type: Grant
    Filed: December 29, 2009
    Date of Patent: March 22, 2016
    Assignee: Inktec Co., Ltd.
    Inventors: Kwang Choon Chung, Hyun Nam Cho, Ji Hoon Yoo, Jae Ho Beak, Yoo Seong Kim
  • Patent number: 9269478
    Abstract: Provided are a method for preparing a transparent conductive layer and a transparent conductive layer prepared by the method. The method for preparing a transparent conductive layer includes: 1) forming a cellulose derivative film by coating a transparent substrate with a cellulose derivative coating liquid; 2) hydrolyzing the cellulose derivatives by treating the cellulose derivative film using an alkaline agent; 3) forming a metal film by coating the hydrolyzed cellulose derivative film with an organic metal ink and reducing metals on the cellulose derivative; and 4) forming a conductive metal layer by heat-treating the cellulose derivative film with the metal film formed, and a transparent conductive layer prepared by the method. According to the present invention, a process can be simplified, and also a transparent conductive layer having excellent conductivity, transmittance, bending resistance, and low haze can be prepared.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: February 23, 2016
    Assignee: INKTEC CO., LTD.
    Inventors: Kwang Choon Chung, Hyun Nam Cho, Ji Hoon Yoo, Yun Ho Jung, Su Phil Kim
  • Patent number: 9230707
    Abstract: Provided is a production method for a transparent conductive film wherein: a substrate has formed thereon a transparent conductive oxide, a conductive metal body, and a conductive polymer comprised in a transparent composite conductive layer; or else a substrate has formed thereon a transparent conductive oxide layer; a conductive metal body layer, and a conductive polymer layer comprised in a transparent composite conductive layer; or a substrate has formed thereon a transparent conductive oxide layer, and also a conductive metal body and a conductive polymer comprised in an organic-inorganic hybrid layer in a transparent composite conductive layer. Also provided is a transparent conductive film produced by means of the method.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: January 5, 2016
    Assignee: Inktec Co., Ltd.
    Inventors: Kwang Choon Chung, Hyun-Nam Cho, Ji Hoon Yoo, Yun-Ho Jung
  • Publication number: 20150343525
    Abstract: Disclosed herein is a method for centrifugal casting of a motor rotor. The method includes: assembling molds and a core; heating the assembled mold and core to a preset temperature; and forming a motor core by injecting molten metal into a forming space inside the mold and the core while rotating the assembled mold.
    Type: Application
    Filed: May 30, 2014
    Publication date: December 3, 2015
    Applicant: HYUNDAI HEAVY INDUSTRIES CO., LTD
    Inventors: Sung-Mo LEE, Kwang-Jin HAN, Ji-Hoon YOO, Jong-Wook LIM, Young-Cheol YOON
  • Patent number: 9107317
    Abstract: The present invention relates to a method for fabricating blackened conductive patterns, which includes (i) forming a resist layer on a non-conductive substrate; (ii) forming fine pattern grooves in the resist layer using a laser beam; (iii) forming a mixture layer containing a conductive material and a blackening material in the fine pattern grooves; and (iv) removing the resist layer remained on the non-conductive substrate.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: August 11, 2015
    Assignee: Inktec Co., Ltd.
    Inventors: Kwang Choon Chung, Ji Hoon Yoo, Byung Hun Kim, Su Han Kim
  • Patent number: 9090785
    Abstract: The present invention relates to a silver ink composition comprising: silver complexes obtained by reacting one or more silver compounds selected from chemical formula 1 with one or more ammonium carbamate-based compounds or ammonium carbonate-based compounds selected from chemical formula 2 to chemical formula 4; and oxime-based compounds.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: July 28, 2015
    Assignee: INKTEC CO., LTD.
    Inventors: Kwang-Choon Chung, Hyun Nam Cho, Ji Hoon Yoo, Dae Sang Han
  • Publication number: 20150151785
    Abstract: A method for detecting a motor error of a motor driven power steering (MDPS) may include: calculating, by a control unit, a Q-axis command current of a motor through a Q-axis command current calculation unit, according to requested torque; calculating a command current of each phase of the motor from the calculated Q-axis command current of the motor; controlling the motor according to the Q-axis command current of the motor, and sensing a measured current of each phase of the motor through each current sensor; determining whether each phase of the motor is disconnected, through the command current and the measured current of each phase of the motor; and outputting the determination result to an output unit.
    Type: Application
    Filed: July 1, 2014
    Publication date: June 4, 2015
    Inventor: Ji Hoon Yoo
  • Patent number: 8979972
    Abstract: Disclosed herein is a method of manufacturing a metal flake, including the steps of: applying metal ink containing an organic metal compound onto a substrate; calcining the metal ink applied on the substrate to form a thin metal film; separating the formed thin metal film from the substrate; and pulverizing the separated thin metal film. The method of manufacturing a metal flake is characterized in that the thickness and size of metal flakes can be easily adjusted, metal flakes having excellent conductivity and gloss can be obtained, and metal flakes can be mass-produced using environmentally friendly and economical methods.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: March 17, 2015
    Assignee: Inktec Co., Ltd.
    Inventors: Kwang Choon Chung, Hyun Nam Cho, Dong Rip Kim, Ji Hoon Yoo
  • Publication number: 20150068787
    Abstract: Provided herein is a conductive pattern making method and conductive pattern, the method including forming a groove such that its width in an inlet area is bigger than its width in an inner area; filling the groove with a conductive ink composition; and drying the conductive ink composition so that a solvent contained in the conductive ink composition inside the groove is volatilized to reduce the volume of the conductive ink composition.
    Type: Application
    Filed: September 8, 2014
    Publication date: March 12, 2015
    Inventors: Kwang-Choon Chung, Ji Hoon Yoo, Joonki Seong, Dae Sang Han, Nam-Boo Cho
  • Publication number: 20150068699
    Abstract: Disclosed herein is a centrifugal casting machine, including: a rotating plate rotating by means of a motor; a cylindrical sleeve installed on the rotating plate and having an internal diameter corresponding to an external diameter of silicon steel plates constituting a core in the sleeve; an upper mold internally installed on the sleeve to define a first molding space into which a molten metal is introduced to mold an end ring; a lower mold internally installed on the sleeve to define a second molding space into which a molten metal is introduced to mold an end ring; a dummy shaft fitted in the center of the core and coupled to the lower mold; a cap coupled to an upper end of the dummy shaft to press the core; and a hydraulic ram coupled to the lower mold to move the lower mold up and down and coupled to the rotating plate to rotate therewith.
    Type: Application
    Filed: September 4, 2014
    Publication date: March 12, 2015
    Applicant: HYUNDAI HEAVY INDUSTRIES CO., LTD.
    Inventors: Ji-Hoon YOO, Kwang-Jin HAN, Sung-Mo LEE, Byoung-Hun KWON, Deok-Su KIM
  • Publication number: 20140377455
    Abstract: The present invention relates to a method for fabricating blackened conductive patterns, which includes (i) forming a resist layer on a non-conductive substrate; (ii) forming fine pattern grooves in the resist layer using a laser beam; (iii) forming a mixture layer containing a conductive material and a blackening material in the fine pattern grooves; and (iv) removing the resist layer remained on the non-conductive substrate.
    Type: Application
    Filed: September 9, 2014
    Publication date: December 25, 2014
    Inventors: Kwang Choon Chung, Ji Hoon Yoo, Su-Han Kim, Byung Hun Kim
  • Patent number: 8866128
    Abstract: The present invention relates to a method capable of considerably improving the characteristics of an organic electroluminescent device. The present invention provides a method capable of reducing operating voltage and improving efficiency by inserting an inorganic oxide interlayer configured of at least one layer between light-emitting layers.
    Type: Grant
    Filed: August 13, 2007
    Date of Patent: October 21, 2014
    Assignee: Inktec Co., Ltd.
    Inventors: Hyun-Nam Cho, Ji-Hoon Yoo, Kwang-Choon Chung