Patents by Inventor Kang Hoon Choi
Kang Hoon 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).
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Patent number: 12002404Abstract: A scan driver includes a plurality of stages. An nth (n is a natural number) stage among the stages includes: a first and a second input circuit for controlling a voltage of a first node in response to a carry signal of a previous stage and a next stage, respectively; a first output circuit for outputting an nth carry signal corresponding to a carry clock signal in response to the voltage of the first node; a second output circuit for outputting an nth scan and an nth sensing signal corresponding to a scan and a sensing clock signal, respectively, in response to the voltage of the first node; and a sampling circuit for storing the carry signal of the previous stage in response to a first select signal, and for supplying a control voltage to the first node in response to a second select signal and the stored carry signal.Type: GrantFiled: April 10, 2023Date of Patent: June 4, 2024Assignee: Samsung Display Co., Ltd.Inventors: Kang Nam Kim, Sung Hoon Lim, Woo Geun Lee, Kyu Sik Cho, Jae Beom Choi
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Patent number: 11990270Abstract: An aspect of the present disclosure provides a bus bar as a winding in a core of a transformer includes multiple sub-bars arranged horizontally and connected in parallel so as to minimize an AC current in the transformer, and the sub-bars have different widths and thus resistances or impedances with respect to a current flowing through the sub-bars are the same. Another aspect of the present disclosure provides a method of designing a bus bar for resistance or impedance matching between multiple sub-bars included in the bus bar to share a current to minimize an AC current in the transformer. Another aspect of the present disclosure provides a transformer, for a DC-DC converter for use in a vehicle, which is manufactured by the method of designing a bus bar.Type: GrantFiled: November 23, 2021Date of Patent: May 21, 2024Assignee: HYUNDAI MOBIS CO., LTD.Inventors: Tae Ho Bang, Deok Kwan Choi, Won Gon Kim, Min Heo, Ji Hoon Park, Kang Min Kim, A Ra Lee, Hyun Woo Shim, Du Ho Kim, Soo Min Jeon
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Patent number: 8246178Abstract: A focus control device for a beam projector allows the focus of a lens assembly to be finely and easily controlled. The focus control device includes: a control member rotatably mounted on the beam projector for controlling the focus of a lens assembly; a rotary eccentric member provided in the control member, the rotary eccentric member having a control axis eccentric to the rotary axis of the control member, and being rotated while depicting an elliptical trace in response to the rotation of the control member; a focus guide member provided in the rotary eccentric member, the focus guide member allowing the lens assembly to be moved rectilinearly in the direction of an optical axis in response to the rotation of the control member; and an actuating member provided in the lens assembly and coupled to the focus guide member, the actuating member moving the lens assembly in the direction of the optical axis in response to the movement of the focus guide member.Type: GrantFiled: February 5, 2010Date of Patent: August 21, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Myeong-Ho Jeon, Moon-Chul Shin, Kang-Hoon Choi, Hyon-Myong Song, Jin-Hee Cho, Kyung-Han Kim, Hyun-Jun Jang
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Patent number: 8227177Abstract: The invention relates to a method with contrast reversal which, inter alia, opens up new areas of application for resists.Type: GrantFiled: May 10, 2007Date of Patent: July 24, 2012Assignee: Infineon Technologies AGInventors: Kang-Hoon Choi, Klaus Elian, Christoph Hohle, Johannes Kretz, Frank Thrum
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Publication number: 20100265475Abstract: A focus control device for a beam projector allows the focus of a lens assembly to be finely and easily controlled. The focus control device includes: a control member rotatably mounted on the beam projector for controlling the focus of a lens assembly; a rotary eccentric member provided in the control member, the rotary eccentric member having a control axis eccentric to the rotary axis of the control member, and being rotated while depicting an elliptical trace in response to the rotation of the control member; a focus guide member provided in the rotary eccentric member, the focus guide member allowing the lens assembly to be moved rectilinearly in the direction of an optical axis in response to the rotation of the control member; and an actuating member provided in the lens assembly and coupled to the focus guide member, the actuating member moving the lens assembly in the direction of the optical axis in response to the movement of the focus guide member.Type: ApplicationFiled: February 5, 2010Publication date: October 21, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Myeong-Ho JEON, Moon-Chul SHIN, Kang-Hoon CHOI, Hyon-Myong SONG, Jin-Hee CHO, Kyung-Han KIM, Hyun-Jun JANG
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Publication number: 20070264595Abstract: The invention relates to a method with contrast reversal which, inter alia, opens up new areas of application for resists.Type: ApplicationFiled: May 10, 2007Publication date: November 15, 2007Inventors: Kang-Hoon Choi, Klaus Elian, Christoph Hohle, Johannes Kretz, Frank Thrum
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Patent number: 6259201Abstract: The present invention relates to an electroluminescent device, which is characterized in that it uses polymer made of ionomer containing metal ions as a charge transport layer. The ionomer contains an ionized metallic salt and the polymer forms a physical cross-linking around the metal. Thus, it has not only a good mechanical property but also a superior thermal stability. Also it shows an ion conductivity due to movement of ion under electric field, and the conductivity can be controlled by varying the concentration of the substituted ion. The ionomer layer can be easily obtained by spin coating method. In addition, the light-emittive quantum efficiency can be greatly increased by inserting the ionomer layer between the electrode and the light-emitting layer to form a stabilized interface. On the other hand, it can be applied to manufacturing of the flexible electroluminescent device because the ionomer is also a polymer.Type: GrantFiled: July 29, 1998Date of Patent: July 10, 2001Assignee: Electronics and Telecommunications Research InstituteInventors: Hyang Mok Lee, Kang Hoon Choi, Do Hoon Hwang, Lee Mi Do, Taehyoung Zyung
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Patent number: 6117965Abstract: There is disclosed a synthetic method of mixing a soluble poly(1,4-phenylenvinylene) (PPV) derivative in which two silyl groups are substituted, and an electroluminescent device using the same. In the poly[2,5-bis(dimethyloctylsilyl)-1,4-phenylenvinylene] (BDMOS-PPV) according to the present invention, the final polymer is easily dissolved in common organic solvents and shows a measured absolute PL quantum efficiency of 60% much higher than that of the conventional PPV having 25%, thus making it possible to be applied as material of an electroluminescent device. Also, it provides an outstanding advantage that it can be applied to a flexible light-emitting device.Type: GrantFiled: November 24, 1998Date of Patent: September 12, 2000Assignee: Electronics and Telecommunications Research InstituteInventors: Do Hoon Hwang, Sang Don Jung, Lee Mi Do, Tae Hyoung Zyung, Hyang Mok Lee, Kang Hoon Choi
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Patent number: 5970318Abstract: A method for manufacturing an organic EL display including an organic EL elements and an organic field effect transistors being integrated on a same substrate is disclosed. A semitransparent electrode layer of the organic EL element and a gate electrode of the organic transistor are formed on a same transparent plastic substrate. An organic gate insulating layer is deposited on the gate electrode and an organic semiconductor layer is formed on the organic gate insulating layer. A source and drain electrodes is formed on the organic semiconductor layer. An organic EL layer is formed on the semitransparent electrode layer and a part of the drain electrode. The organic semiconductor layer can be made of a charge transfer complex or a thiophene derivative polymer. The resultant EL device is capable of mechanically bent, and then is readily adaptable for use in flexible displays.Type: GrantFiled: May 15, 1998Date of Patent: October 19, 1999Assignee: Electronics and Telecommunications Research InstituteInventors: Kang Hoon Choi, Tae Hyung Zyung, Sang Don Jung, Lee Mi Do
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Patent number: 5909038Abstract: There is disclosed a syntheitc method of mixing a soluble poly(1,4-phenylenvinylene)(PPV) derivative in which two silyl groups are substituted, and an electroluminescent device using the same. In the poly?2,5-bis(dimethyloctylsilyl)-1,4-phenylenvinylene! (BDMOS-PPV) according to the present invention, the final polymer is easily dissolved in common organic solvents and shows a measured absolute PL quantum efficiency of 60% much higher than that of the conventional PPV having 25%, thus making it possible to be applied as material of an electroluminnescent device. Also, it provides an outstanding advantage that it can be applied to a flexible light-emitting device.Type: GrantFiled: August 28, 1998Date of Patent: June 1, 1999Assignee: Electronics and Telecommunications Research InstituteInventors: Do Hoon Hwang, Sang Don Jung, Lee Mi Do, Tae Hyoung Zyung, Hyang Mok Lee, Kang Hoon Choi
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Patent number: 5876786Abstract: A method of manufacturing an organic/polymer electroluminescent device to effectively inject electrons and holes by forming a film consisting of a charge transfer complex or charge transfer salt between a organic/polymer electroluminescent layer and electrodes for injecting electrons and holes in order to increase an electroluminescent quantum efficiency, is disclosed. The inventive structure of organic/polymer electroluminescent device comprises a transparent substrate. A plurality of transparent electrodes is formed on a selected portions of the transparent substrate. A first film is formed on the entire surface of the resulting structure including the plurality of transparent electrodes formed on the selected portions of the transparent substrate. An emissive layer formed on the first film. A second film is then formed on the luminous layer. A plurality of metal electrodes is formed on a selected portions of the second film.Type: GrantFiled: August 28, 1997Date of Patent: March 2, 1999Assignee: Electronics And Telecommunications Research InsituteInventors: Taehyoung Zyung, Sang-Don Jung, Kang-Hoon Choi