Patents by Inventor Sung-hwan Choi

Sung-hwan 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: 20140131021
    Abstract: The present invention relates to a heat exchanger pipe, which enables heat exchange between fluid flowing along the interior of the pipe and fluid existing exterior of the pipe, and the manufacturing method therefor, in particular, a heat exchanger pipe and manufacturing method therefor such that enhances flow of fluid within the pipe's interior, increases heat exchange rate by making more contact, enhancing adherence property and sealing property between the outer pipe and the insertion in the interior of said outer pipe in the manufacturing process, and at the same time is easy to manufacture.
    Type: Application
    Filed: November 15, 2012
    Publication date: May 15, 2014
    Inventor: Sung-hwan CHOI
  • Patent number: 8647932
    Abstract: Disclosed are a thin film transistor and a method of manufacturing the thin film transistor. An electrode layer of the thin film transistor includes a seed layer formed of a transparent conductive material doped with indium gallium zinc oxide (IGZO) and a main layer formed of a transparent conductive material. The thin film transistor includes a substrate, a gate electrode on the substrate, a gate insulation film on the substrate to cover the gate electrode, a semiconductor layer disposed on the gate insulation film in a region corresponding to the gate electrode, an electrode layer having a double layer structure and disposed on the gate insulation film in a manner such that a topside portion of the semiconductor layer is exposed through the electrode layer, and a passivation layer on the gate insulation film to cover the semiconductor layer and the electrode layer.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: February 11, 2014
    Assignee: SNU R&DB Foundation
    Inventors: Sung Hwan Choi, Min Koo Han
  • Publication number: 20130328892
    Abstract: A display apparatus is provided. The display apparatus includes a display unit which displays a screen including at least one content, a communication unit which communicates with a user terminal to control an operation of the display apparatus, and a control unit which transmits screen data corresponding to at least a part of the screen to be displayed on the user terminal in accordance with a predetermined event and reconfigures the screen so that an area of the screen corresponding to the transmitted screen data is distinguished from remaining areas of the screen.
    Type: Application
    Filed: February 19, 2013
    Publication date: December 12, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung-sik PARK, Sung-hwan CHOI, Young-gyu YANG
  • Patent number: 8583641
    Abstract: A method of and apparatus for constructing a user profile using a content tag, a method of recommending digital content by using a user profile including a tag included in the digital content and a preference value for the tag. According to the methods and apparatus, a user profile is generated by using a content tag, and thus the taste of the user according to digital content consumption can be expressed in more varied ways. Also, by suggesting a method of generating a tag from web content, construction of a user profile for digital content having no tag is enabled. Furthermore, a tag extracted from digital content used by a user is included in a profile and it can be used for a variety of purposes, such as expansion of a comparison scope, use of preference keywords, providing of content links, and expansion of search scope.
    Type: Grant
    Filed: June 12, 2012
    Date of Patent: November 12, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yun-ju Choe, Cheol-ju Hwang, Min-ho Lee, Sung-hwan Choi, Won-dong Yun, Soo-hong Park, Jeong-rok Jang, Sang-wook Cho
  • Patent number: 8469650
    Abstract: A wafer transfer system, and method of controlling pressure in the system, includes a loadport for receiving a wafer container, a housing operably connected to the loadport, a wafer transfer mechanism for transferring a wafer between the wafer container and the housing, a wafer container sensor for detecting a presence of the wafer container on the loadport, a variable speed fan disposed in a first portion of the housing, a variable exhaust unit disposed in a second portion of the housing facing the first portion, the variable exhaust unit being capable of varying an exhaust rate of air from the housing, and a controller for variably operating the variable speed fan and the variable exhaust unit in response to a signal from the wafer container sensor.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: June 25, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Soo-woong Lee, Hyung-seok Choi, Jung-sung Hwang, Sung-hwan Choi
  • Patent number: 8463640
    Abstract: A method of adaptively updating a first recommended user group list of a first user connected to a network, in which a predetermined number of second users are selected from the first recommend user group list that is a list of users having a high similarity to the first user in consuming contents. A predetermined number of third users having a high similarity to the first user is selected from second recommend user group lists respectively of the selected second users possess. The first recommend user group list is updated to include the selected third users. As the preference of a user changes, the recommend user group may be reconfigured with updated recommend users by reflecting a corresponding preference. Also, quality contents can be provided by recommending a user of a corresponding terminal with the contents preferred by other users in the updated recommend user group list.
    Type: Grant
    Filed: January 6, 2009
    Date of Patent: June 11, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jeong-rok Jang, Cheol-ju Hwang, Jae-hwang Lee, Min-ho Lee, Sung-hwan Choi, Sang-wook Cho, Yun-ju Choe
  • Patent number: 8460966
    Abstract: A thin film transistor, which has a first passivation layer and a second passivation layer to maintain high reliability while preventing hydrogen from being induced to a semiconductor layer, and a method for fabricating the thin film transistor are provided. The method includes providing a substrate including an insulation substrate, forming a gate electrode on the substrate, forming a gate insulation layer on the substrate and the gate electrode, forming a semiconductor layer on the gate insulation layer, forming source/drain electrodes on the semiconductor layer to expose a portion of a top portion of the semiconductor layer, forming a first passivation layer to cover exposed top portions of the gate insulation layer, the semiconductor layer and the source/drain electrodes, and forming a second passivation layer on the first passivation layer, wherein the forming of the second passivation layer comprises performing deposition at a higher temperature than the forming of the first passivation layer.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: June 11, 2013
    Assignee: Snu R&DB Foundation
    Inventors: Sung Hwan Choi, Min Koo Han
  • Publication number: 20130105799
    Abstract: Provided are a thin film transistor having a passivation layer capable of annealing at low temperature and having stable electric characteristics, and a flexible display using the same. In one embodiment, the thin film transistor includes a passivation layer formed on an active layer, the passivation layer including a fluoropolymer.
    Type: Application
    Filed: December 15, 2011
    Publication date: May 2, 2013
    Applicant: SNU R&DB FOUNDATION
    Inventors: Sung Hwan Choi, Min Koo Han
  • Patent number: 8344384
    Abstract: Disclosed are a thin film transistor and a method of manufacturing the thin film transistor. An electrode layer of the thin film transistor includes a seed layer formed of a transparent conductive material doped with indium gallium zinc oxide (IGZO) and a main layer formed of a transparent conductive material. The thin film transistor includes a substrate, a gate electrode on the substrate, a gate insulation film on the substrate to cover the gate electrode, a semiconductor layer disposed on the gate insulation film in a region corresponding to the gate electrode, an electrode layer having a double layer structure and disposed on the gate insulation film in a manner such that a topside portion of the semiconductor layer is exposed through the electrode layer, and a passivation layer on the gate insulation film to cover the semiconductor layer and the electrode layer.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: January 1, 2013
    Assignee: SNU R&DB Foundation
    Inventors: Sung Hwan Choi, Min Koo Han
  • Publication number: 20120254170
    Abstract: A method of and apparatus for constructing a user profile using a content tag, a method of recommending digital content by using a user profile including a tag included in the digital content and a preference value for the tag. According to the methods and apparatus, a user profile is generated by using a content tag, and thus the taste of the user according to digital content consumption can be expressed in more varied ways. Also, by suggesting a method of generating a tag from web content, construction of a user profile for digital content having no tag is enabled. Furthermore, a tag extracted from digital content used by a user is included in a profile and it can be used for a variety of purposes, such as expansion of a comparison scope, use of preference keywords, providing of content links, and expansion of search scope.
    Type: Application
    Filed: June 12, 2012
    Publication date: October 4, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yun-ju CHOE, Cheol-ju Hwang, Min-ho Lee, Sung-hwan Choi, Won-dong Yun, Soo-hong Park, Jeong-rok Jang, Sang-wook Cho
  • Publication number: 20120187407
    Abstract: Disclosed are a thin film transistor and a method of manufacturing the thin film transistor. An electrode layer of the thin film transistor includes a seed layer formed of a transparent conductive material doped with indium gallium zinc oxide (IGZO) and a main layer formed of a transparent conductive material. The thin film transistor includes a substrate, a gate electrode on the substrate, a gate insulation film on the substrate to cover the gate electrode, a semiconductor layer disposed on the gate insulation film in a region corresponding to the gate electrode, an electrode layer having a double layer structure and disposed on the gate insulation film in a manner such that a topside portion of the semiconductor layer is exposed through the electrode layer, and a passivation layer on the gate insulation film to cover the semiconductor layer and the electrode layer.
    Type: Application
    Filed: February 10, 2011
    Publication date: July 26, 2012
    Applicant: SNU R&DB FOUNDATION
    Inventors: Sung Hwan Choi, Min Koo Han
  • Patent number: 8228610
    Abstract: A lens injection mold includes an upper mold and a lower mold, a cavity provided in the upper mold or the lower mold and having a shape corresponding to the rib portion having the concave portions in order to form the rib portion, and an upper core and a lower core disposed to be movable inside the upper mold and the lower mold and having an upper tip portion and a lower tip portion, respectively, the tip portions having a shape corresponding to the effective aperture portion such that the effective aperture portion is created by pressing injection liquid.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: July 24, 2012
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jin Wook Na, Young Ro Jeon, Sun Ok Kim, Sung Hwan Choi
  • Patent number: 8200667
    Abstract: A method of and apparatus for constructing a user profile using a content tag, a method of recommending digital content by using a user profile including a tag included in the digital content and a preference value for the tag. According to the methods and apparatus, a user profile is generated by using a content tag, and thus the taste of the user according to digital content consumption can be expressed in more varied ways. Also, by suggesting a method of generating a tag from web content, construction of a user profile for digital content having no tag is enabled. Furthermore, a tag extracted from digital content used by a user is included in a profile and it can be used for a variety of purposes, such as expansion of a comparison scope, use of preference keywords, providing of content links, and expansion of search scope.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: June 12, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yun-ju Choe, Cheol-ju Hwang, Min-ho Lee, Sung-hwan Choi, Won-dong Yun, Soo-hong Park, Jeong-rok Jang, Sang-wook Cho
  • Publication number: 20120018721
    Abstract: A thin film transistor, which has a first passivation layer and a second passivation layer to maintain high reliability while preventing hydrogen from being induced to a semiconductor layer, and a method for fabricating the thin film transistor are provided. The method includes providing a substrate including an insulation substrate, forming a gate electrode on the substrate, forming a gate insulation layer on the substrate and the gate electrode, forming a semiconductor layer on the gate insulation layer, forming source/drain electrodes on the semiconductor layer to expose a portion of a top portion of the semiconductor layer, forming a first passivation layer to cover exposed top portions of the gate insulation layer, the semiconductor layer and the source/drain electrodes, and forming a second passivation layer on the first passivation layer, wherein the forming of the second passivation layer comprises performing deposition at a higher temperature than the forming of the first passivation layer.
    Type: Application
    Filed: July 13, 2011
    Publication date: January 26, 2012
    Applicant: SNU R&DB FOUNDATION
    Inventors: Sung Hwan Choi, Min Koo Han
  • Publication number: 20110318580
    Abstract: There is provided an adhesive tape for manufacturing electronic components comprising a heat-resistant substrate and an adhesive layer containing an adhesive composition disposed on the heat-resistant substrate, wherein the adhesive composition comprises a phenoxy resin, a curing agent, an energy ray curable acrylic resin and a photoinitiator, and wherein the adhesive layer is cured by heat and an energy ray.
    Type: Application
    Filed: March 9, 2009
    Publication date: December 29, 2011
    Inventors: Sung-Hwan Choi, Ki-Jeong Moon, Hae-Sang Jeon, Chang-Hoon Sim
  • Patent number: 8069010
    Abstract: A method and apparatus for predicting content preferences of an active user with reference to content preferences of other users that are similar to those of the active user, the method including: measuring similarity ratios of the active user and other users using an overlapping ratio of use of content items commonly used between the active user and the respective other users; generating a recommender list for the active user based on the measured similarity ratios; and predicting a preference rating of the first user with respect to an unused content item based on a preference rating of an other user included in the recommender list with respect to the unused content item. Accordingly, the similarity ratio between the users can be accurately measured so that reliability of a preference rating prediction system can be increased.
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: November 29, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-hwan Choi, Cheol-ju Hwang, Jae-hwang Lee, Jeong-rok Jang, Yun-ju Choe, Do-yeon Kim
  • Publication number: 20110205642
    Abstract: There is provided a plastic lens, a lens module and a lens injection mold. The plastic lens includes an effective aperture portion being an optical surface of the lens and a rib portion being a circumferential portion of the lens. The effective aperture portion and the rib portion are shaped in concentric circles having the same central axis. The rib portion includes three or more concave portions in an outer circumferential portion thereof, the concave portions being positioned to be symmetrical with respect to the central axis. The plastic lens is designed to be symmetrical with respect to a concentric axis so that it may avoid asymmetric contraction inside a barrel. Also, since the concave portions, when assembled in the barrel, do not contact an inner circumferential surface of the barrel, press-fitting force in the assembly thereof is reduced so that deformation caused by excessive press-fitting force applied thereto may be avoided.
    Type: Application
    Filed: January 27, 2011
    Publication date: August 25, 2011
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Jin Wook Na, Young Ro Jeon, Sun Ok Kim, Sung Hwan Choi
  • Publication number: 20110056623
    Abstract: This disclosure provides a method for laminating an adhesive tape and a lead frame, more specifically to reduce the warpage of a lead frame after heated lamination in which an adhesive tape for manufacturing semiconductor devices is attached to the lead frame, satisfying all the properties required for lamination, and avoiding adhesive residues from adhesive tapes and the leakage of a sealing resin. A method for laminating an adhesive tape and a lead frame comprises laminating an adhesive tape and a lead, wherein the lamination temperature of an adhesive tape surface and that of a lead frame surface are different from each other, for example, wherein the lamination temperature of the lead frame surface is lower than that of the adhesive tape surface by about 1 to about 200° C.
    Type: Application
    Filed: November 10, 2009
    Publication date: March 10, 2011
    Applicant: Toray Saehan, Inc.
    Inventors: Min-Ho IM, Sung-Hwan Choi, Chang-Hoon Sim, Ki-Jeong Moon, Hae-Sang Jeon
  • Publication number: 20100330278
    Abstract: There is provided a method for treating a surface of a substrate, comprising forming a layer, such as a mixed self-assembled monolayer (SAM), on the surface via chemical vapor deposition (CVD) with a CF3-functionalized organic silane and a CH3-functionalized organic silane, wherein the length of a carbon chain of the CH3-functional organic silane is shorter than a carbon chain of the CF3-functionalized organic silane.
    Type: Application
    Filed: August 24, 2010
    Publication date: December 30, 2010
    Inventors: Sung-Hwan Choi, Ki-Jeong Moon, Hae-Sang Jeon
  • Patent number: D703299
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: April 22, 2014
    Assignee: Kiturami Co., Ltd.
    Inventor: Sung-Hwan Choi