Patents by Inventor Cheol Kwak
Cheol Kwak 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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Publication number: 20230271233Abstract: The present invention provides a system for collecting tripper room fugitive dust of a power plant coal transfer facility, wherein the system includes an entrance dust collection module disposed at the entrance of a tripper room to block dust; a tripper car configured to move along a transfer conveyor disposed inside the tripper room and transfer fuel introduced through the entrance to silos; and a main dust collection module configured prevent spread of dust by removing dust in response to movement of the tripper car and adjusting the pressure at the point where dust is generated.Type: ApplicationFiled: July 28, 2020Publication date: August 31, 2023Inventors: Heok Soo JEON, Byeong Cheol KWAK, Jong Pyo KIM, Su Young CHOI
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Patent number: 9752368Abstract: A door checker device for use in automobiles which includes a fixing member attached to one side of the car body, a checker arm having one end hinge-coupled to the fixing member to be rotated, wherein the checker arm is disposed between a door and the car body, and a door checker attached to one side of the door side and engaged with the checker arm to slid along the longitudinal direction of the checker arm, wherein the door checker allows the door to maintain a stationary state at a predetermined position in the swing trajectory of the door.Type: GrantFiled: October 16, 2013Date of Patent: September 5, 2017Assignee: KWANG JIN MACHINE CO., LTD.Inventor: Byeong Cheol Kwak
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Publication number: 20150233165Abstract: A door checker device for use in automobiles which includes a fixing member attached to one side of the car body, a checker arm having one end hinge-coupled to the fixing member to be rotated, wherein the checker arm is disposed between a door and the car body, and a door checker attached to one side of the door side and engaged with the checker arm to slid along the longitudinal direction of the checker arm, wherein the door checker allows the door to maintain a stationary state at a predetermined position in the swing trajectory of the door.Type: ApplicationFiled: October 16, 2013Publication date: August 20, 2015Inventor: Byeong Cheol Kwak
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Patent number: 8304854Abstract: Disclosed are a semiconductor integrated circuit chip, a multilayer chip capacitor, and a semiconductor integrated circuit chip package. The semiconductor integrated circuit chip includes a semiconductor integrated circuit chip body, an input/output terminal disposed on the outside of the semiconductor integrated circuit chip body, and a decoupling capacitor disposed at a side face of the semiconductor integrated circuit chip body and electrically connected to the input/output terminal. The semiconductor integrated circuit chip cab be obtained, which can maintain an impedance of a power distribution network below a target impedance in a wide frequency range, particularly at a high frequency, by minimizing an inductance between a decoupling capacitor and a semiconductor integrated circuit chip.Type: GrantFiled: November 13, 2008Date of Patent: November 6, 2012Assignees: Samsung Electro-Mechanics Co., Ltd., Clemson UniversityInventors: Byoung Hwa Lee, Min Cheol Park, Ho Cheol Kwak, Haixin Ke, Todd Harvey Hubing
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Publication number: 20100117192Abstract: Disclosed are a semiconductor integrated circuit chip, a multilayer chip capacitor, and a semiconductor integrated circuit chip package. The semiconductor integrated circuit chip includes a semiconductor integrated circuit chip body, an input/output terminal disposed on the outside of the semiconductor integrated circuit chip body, and a decoupling capacitor disposed at a side face of the semiconductor integrated circuit chip body and electrically connected to the input/output terminal. The semiconductor integrated circuit chip cab be obtained, which can maintain an impedance of a power distribution network below a target impedance in a wide frequency range, particularly at a high frequency, by minimizing an inductance between a decoupling capacitor and a semiconductor integrated circuit chip.Type: ApplicationFiled: November 13, 2008Publication date: May 13, 2010Inventors: Byoung Hwa Lee, Min Cheol Park, Ho Cheol Kwak, Haixin Ke, Todd Harvey Hubing
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Patent number: 7651752Abstract: Disclosed herein is a super resolution optical disc. The super resolution optical disc comprises dielectric layers, and a mask layer formed between the dielectric layers, in which the mask layer is constructed as a complex mask layer comprising a metallic oxide (MOx) or metallic nitride (MNy), and a metallic thin film formed thereon. A size of the cavities and an amount of metallic particles in cavities created by illumination of recording laser can be controlled to increase a level of a reproduction signal for recording marks and to enhance the quality of the reproduction signal.Type: GrantFiled: May 19, 2005Date of Patent: January 26, 2010Assignee: LG Electronics Inc.Inventors: Kun Ho Ahn, Keum Cheol Kwak, Jin Hong Kim
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Patent number: 7534480Abstract: Disclosed is a multi-layer super resolution optical disc. In the multi-layer super resolution optical disc, at least two recording layers, each of which comprises at least two mask layers and impact absorption layers formed between the mask layers, are laminated, and intermediate layers of polymer thermo-set by ultraviolet rays are formed between the recording layers. Accordingly, jitter characteristics for recording marks are improved, and recording density is enhanced.Type: GrantFiled: May 18, 2005Date of Patent: May 19, 2009Assignee: LG Electronics Inc.Inventors: Kun Ho Ahn, Keum Cheol Kwak
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Patent number: 7299014Abstract: A method for a video call receiving service in a mobile communication system is disclosed, in which a video call and a voice call can be distinguished using a sub-address of the mobile communication system and a user is able to receive the call selectively. The method includes transmitting a message, including a sub-address corresponding to either a voice call and a video call, from an origination terminal to a destination terminal. A call is connected between the origination terminal and the destination terminal in accordance the sub-address received by the destination terminal. The video call and the voice call are distinguished through the sub-address, the user is able to receive the call selectively, and the connection of the respective call can be automatically performed, thereby reducing the processing load on the system.Type: GrantFiled: December 21, 2001Date of Patent: November 20, 2007Assignee: LG Electronics Inc.Inventors: Jong-Hyun Jin, Jae-Cheol Kwak
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Patent number: 7248372Abstract: The disclosure includes a system, device, apparatus and programmed medium of measuring thickness of an optical disc by using an interference effect of the optical disc layer. Such a system can include: a spectroscope to separate light, reflected from a surface of an optical disc, into constituent frequencies thereof; an optical intensity measuring unit to measure intensities of the constituent frequencies, respectively, as a first spectrum of data; and a processor to do at least the following, convert the first spectrum data into a second spectrum of values that exhibits variation as a function wavelength and refractive index, transform the second spectrum using a Fast Fourier Transform, and detect a thickness of one or more of the spacer layer and the cover layer, respectively, based upon the transformed spectrum. The disclosed technologies have advantages for high precisely measuring thickness of an optical disc.Type: GrantFiled: September 12, 2006Date of Patent: July 24, 2007Assignee: LG Electronics, Inc.Inventors: Seong Yun Jeong, Jin Yong Kim, Jin Hong Kim, Hun Seo, Keum Cheol Kwak
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Publication number: 20070145472Abstract: A flash memory cell may include a tunnel oxide layer over a semiconductor substrate with a first tunnel having a first thickness and a second tunnel having a second thickness. A charge storage layer may be formed over a tunnel oxide layer, an insulating layer may be formed over a charge storage layer, and/or a control gate may be formed over an insulating layer. A control gate may be supplied with driving power. A first thickness of a first tunnel may be less than a second thickness of a second tunnel.Type: ApplicationFiled: December 19, 2006Publication date: June 28, 2007Inventor: Cheol Kwak
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Patent number: 7232598Abstract: Disclosed is a super resolution optical disc. The super resolution optical disc comprises at least two mask layers. In one embodiment, the super resolution optical mask comprises a plurality of mask layers and impact absorption layers between the mask layers, and may further comprise diffusing prevention layers between the mask layer and the impact absorption layer. In another embodiment, the super resolution optical mask comprises a plurality of recording layers and dielectric layers separating the recording layers, each of the recording layers including two mask layers and an impact absorption layer between the mask layers or including two mask layers, an impact absorption layer between the mask layers, and diffusion preventing layers between the mask layer and the impact absorption layer. Accordingly, recording marks have an enhanced shape at an outer periphery of the marks, thereby enhancing the quality of the reproduction signal and enabling high-density multi-level recording.Type: GrantFiled: October 21, 2004Date of Patent: June 19, 2007Assignee: LG Electronics Inc.Inventors: Kun Ho Ahn, Keum Cheol Kwak, Jin Hong Kim
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Patent number: 7188510Abstract: An apparatus and method for testing mechanical endurance of a surface of an optical disc are disclosed. The apparatus includes a rotating plate, on which an optical disc to be scratched is loaded, for rotating the loaded optical disc, and a plurality of abrasion wheels of a predetermined type, disposed at a perpendicular to the rotating plate, for contacting the optical disc and generating the scratch, the scratch being generated when the optical disc rotates a predetermined number of turns, e.g., maximum of 5 turns for the abrasion wheels to apply a predetermined load on the optical disc.Type: GrantFiled: October 7, 2004Date of Patent: March 13, 2007Assignee: LG Electronics Inc.Inventors: Hun Seo, Jin Hong Kim, Chang Ho Lee, Tae Hee Jeong, Keum Cheol Kwak
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Patent number: 7145662Abstract: A method of measuring thickness of an optical disc by using an interference effect of the optical disc layer is disclosed. The method includes detecting an intensity of a reflective light according to a wavelength of a light as spectrum data for each wavelength, converting the detected spectrum data for each wavelength into a spectrum value as a function of a wavelength that a refractive index is reflected, and detecting a position where the intensity of the reflective light has a peak as a thickness of a spacer layer and a cover layer respectively by converting the converted value into a length of an interference area for representing a layer thickness of the optical disc by the Fast Fourier Transform. The disclosed method has advantages for high precisely measuring thickness of an optical disc.Type: GrantFiled: August 5, 2003Date of Patent: December 5, 2006Assignee: LG Electronics, Inc.Inventors: Seong Yun Jeong, Jin Yong Kim, Jin Hong Kim, Hun Seo, Keum Cheol Kwak
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Patent number: 6874350Abstract: An apparatus and method for testing mechanical endurance of a surface of an optical disc are disclosed. The apparatus includes a rotating plate, on which an optical disc to be scratched is loaded, for rotating the loaded optical disc, and a plurality of abrasion wheels of a predetermined type, disposed at a perpendicular to the rotating plate, for contacting the optical disc and generating the scratch, the scratch being generated when the optical disc rotates a predetermined number of turns, e.g., a maximum of 5 turns for the abrasion wheels to apply a predetermined load on the optical disc.Type: GrantFiled: September 2, 2003Date of Patent: April 5, 2005Assignee: LG Electronics Inc.Inventors: Hun Seo, Jin Hong Kim, Chang Ho Lee, Tae Hee Jeong, Keum Cheol Kwak
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Publication number: 20040226350Abstract: An apparatus and method for testing an endurance of an optical disc, whereby the reliability of the test is enhanced, is disclosed. The method includes fixing the optical disc on a rotation plate, and rotating the optical disc along with the rotation plate, supplying a predetermined pressure to the scratcher, while the optical disc rotates for a predetermined number of rotation turns, so as to produce a scratch on a surface of the optical disc, resulting from a contact with the scratcher, and determining the endurance of the optical disc based on the scratch produced on the surface of the optical disc.Type: ApplicationFiled: March 16, 2004Publication date: November 18, 2004Inventors: Jin Hong Kim, Hun Seo, Chang Ho Lee, Tae Hee Jeong, Keum Cheol Kwak, Seoung Won Lee
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Publication number: 20040182169Abstract: An apparatus and method for testing mechanical endurance of a surface of an optical disc are disclosed. The apparatus includes a rotating plate, on which an optical disc to be scratched is loaded, for rotating the loaded optical disc, and a plurality of abrasion wheels, disposed at a perpendicular to the rotating plate, for contacting the optical disc and generating the scratch, the scratch being generated when the optical disc rotates under 5 turns for the abrasion wheels apply a predetermined load on the optical disc.Type: ApplicationFiled: September 2, 2003Publication date: September 23, 2004Inventors: Hun Seo, Jin Hong Kim, Chang Ho Lee, Tae Hee Jeong, Keum Cheol Kwak
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Publication number: 20020080943Abstract: A method for a video call receiving service in a mobile communication system is disclosed, in which a video call and a voice call can be distinguished using a sub-address of the mobile communication system and a user is able to receive the call selectively. The method includes transmitting a message, including a sub-address corresponding to either a voice call and a video call, from an origination terminal to a destination terminal. A call is connected between the origination terminal and the destination terminal in accordance the sub-address received by the destination terminal. The video call and the voice call are distinguished through the sub-address, the user is able to receive the call selectively, and the connection of the respective call can be automatically performed, thereby reducing the processing load on the system.Type: ApplicationFiled: December 21, 2001Publication date: June 27, 2002Applicant: LG Electronics, Inc.Inventors: Jong-Hyun Jin, Jae-Cheol Kwak
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Patent number: 6396245Abstract: A method for gauging a battery voltage of a portable terminal is disclosed, in which low voltage alarm and power cutoff time are determined by obtaining characteristic of a discharge curve slope of the battery, thereby improving reliability of the battery and increasing its available time. The method includes the steps of converting an analog voltage value, sampling the converted digital voltage value at a constant period, comparing the sampled digital voltage value with a predetermined number of previously sampled digital value to obtain a value of a discharge curve slope of the battery, and displaying remaining state of the battery depending on the obtained slope value.Type: GrantFiled: November 17, 2000Date of Patent: May 28, 2002Assignee: LG Electronics Inc.Inventors: Youn Jo Jeong, Jae Cheol Kwak