Patents by Inventor Dong Hyun Hwang
Dong Hyun Hwang 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: 10380945Abstract: The present invention provides a technology of simultaneously sensing characteristics of a plurality of OLED pixels. Further, a current mirroring circuit for sensing characteristics of OLED pixels can be applied to fields other than sensing characteristics of OLED pixels, and the current mirroring technology can output sensing currents having a uniform magnitude within a predetermined error range to a plurality of output terminals.Type: GrantFiled: November 29, 2017Date of Patent: August 13, 2019Assignee: SILICON WORKS CO., LTD.Inventors: Dong Hyun Hwang, Se Won Lee
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Patent number: 10330576Abstract: A sensor for measuring shear force and a dummy for testing a vehicle using the same are provided herein. A sensor for measuring shear force which is configured to quantitatively accurately measure shear force applied to a human body who sits on a vehicle seat, and a dummy for measuring shear force using the sensor are provided, wherein the sensor for measuring shear force includes an upper block, an intermediate block and a lower block and is configured such that a first strain gauge is mounted upright between the upper block and the intermediate block and a second strain gauge is mounted upright between the intermediate block and the lower block so that the shear force can be accurately measured without being affected by horizontal tensile force.Type: GrantFiled: August 30, 2017Date of Patent: June 25, 2019Assignees: Hyundai Motor Company, Kia Motors Corporation, University Industry Foundation, Yonsei University Wonju CampusInventors: Tae Uk Kang, Han Sung Kim, Seong Guk Kim, Dong Hyun Kim, Dong Hyun Hwang, Han A. Lee, Ye Eun Song
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Patent number: 10059917Abstract: Provided is an apparatus for stimulating cells using a 3D clinostat and ultrasonic waves in experiment equipment for studying adverse influences on a human body under microgravity and taking a countermeasure against the influences. Further, provided is a method of stimulating cells using a 3D clinostat and ultrasonic waves to study adverse influences on a human body under microgravity and to take a countermeasure against the influences.Type: GrantFiled: February 13, 2014Date of Patent: August 28, 2018Assignee: YONSEI UNIVERSITY WONJU INDUSTRY-ACADEMIC COOPERATION FOUNDATIONInventors: Han Sung Kim, Ji Hyung Park, Jong Bum Seo, Sinae Eom, Jung Woo Son, Tae Min Shin, Dong Hyun Seo, Dong Hyun Hwang, Seong Guk Kim
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Publication number: 20180166020Abstract: The present invention relates to technology for driving a display device, and provides technology which, in sensing pixels arranged in a panel, processes a signal having a wide range by using a low-voltage element.Type: ApplicationFiled: December 1, 2017Publication date: June 14, 2018Inventors: Dong Hyun HWANG, Hyun Ho KIM, Se Won LEE
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Publication number: 20180164198Abstract: A sensor for measuring shear force and a dummy for testing a vehicle using the same are provided herein. A sensor for measuring shear force which is configured to quantitatively accurately measure shear force applied to a human body who sits on a vehicle seat, and a dummy for measuring shear force using the sensor are provided, wherein the sensor for measuring shear force includes an upper block, an intermediate block and a lower block and is configured such that a first strain gauge is mounted upright between the upper block and the intermediate block and a second strain gauge is mounted upright between the intermediate block and the lower block so that the shear force can be accurately measured without being affected by horizontal tensile force.Type: ApplicationFiled: August 30, 2017Publication date: June 14, 2018Applicants: Hyundai Motor Company, Kia Motors Corporation, University Industry Foundation, Yonsei University Wonju CampusInventors: Tae Uk KANG, Han Sung KIM, Seong Guk KIM, Dong Hyun KIM, Dong Hyun HWANG, Han A. LEE, Ye Eun SONG
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Publication number: 20180158413Abstract: The present invention provides a technology of simultaneously sensing characteristics of a plurality of OLED pixels. Further, a current mirroring circuit for sensing characteristics of OLED pixels can be applied to fields other than sensing characteristics of OLED pixels, and the current mirroring technology can output sensing currents having a uniform magnitude within a predetermined error range to a plurality of output terminals.Type: ApplicationFiled: November 29, 2017Publication date: June 7, 2018Inventors: Dong Hyun HWANG, Se Won LEE
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Publication number: 20180061329Abstract: Disclosed is a sensing circuit of a display device for external compensation of an OLED. The sensing circuit includes a current receiving unit configured to receive a pixel current containing a leakage current, convert the pixel current at a preset current ratio, and output the converted pixel current; a current source unit; a current sinking unit; a current detection unit; and a detection signal output unit configured to sample an offset voltage corresponding to the leakage current using the detected current.Type: ApplicationFiled: August 11, 2017Publication date: March 1, 2018Applicant: SILICON WORKS CO., LTD.Inventors: Jae Kwan LEE, Dong Hyun HWANG, Hyun Ho KIM
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Patent number: 9878633Abstract: A battery monitoring apparatus that monitors a state of a battery for driving an electric motor includes: a voltage measuring unit configured to measure an analog voltage of each of battery cells; an A/D converter configured to convert the measured analog voltage of each of the battery cells to a digital voltage; a filter configured to perform filtering on the digital voltage converted by the A/D converter; and a control unit configured to receive a cell voltage from the A/D converter or from the filter depending on a change in battery cell voltage and/or a battery use time. The battery monitoring apparatus has advantages in that measurement precision can be increased while data rate is maintained by employing a hybrid filter which is a combination of an average filter and an IIR filter, so that the measurement precision can be increased with minimum additional cost.Type: GrantFiled: December 3, 2015Date of Patent: January 30, 2018Assignee: HYUNDAI AUTRON, CO., LTD.Inventor: Dong-Hyun Hwang
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Patent number: 9550203Abstract: A marking system for springs comprises: an arranging apparatus for arranging a spring; and a marking apparatus for applying an identification mark on the spring. The marking apparatus comprises: a frame having a space for marking therein; a pad unit for applying a mark on the spring located in the frame; and an ink unit for supplying ink to the pad unit.Type: GrantFiled: February 20, 2015Date of Patent: January 24, 2017Assignee: YOUNGHEUNG IRON & STEEL CO. LTD.Inventors: dong hyun Hwang, jae yeol Han
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Publication number: 20160159242Abstract: A battery monitoring apparatus that monitors a state of a battery for driving an electric motor includes: a voltage measuring unit configured to measure an analog voltage of each of battery cells; an A/D converter configured to convert the measured analog voltage of each of the battery cells to a digital voltage; a filter configured to perform filtering on the digital voltage converted by the A/D converter; and a control unit configured to receive a cell voltage from the A/D converter or from the filter depending on a change in battery cell voltage and/or a battery use time. The battery monitoring apparatus has advantages in that measurement precision can be increased while data rate is maintained by employing a hybrid filter which is a combination of an average filter and an IIR filter, so that the measurement precision can be increased with minimum additional cost.Type: ApplicationFiled: December 3, 2015Publication date: June 9, 2016Inventor: Dong-Hyun HWANG
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Publication number: 20160115437Abstract: Provided is an apparatus for stimulating cells using a 3D clinostat and ultrasonic waves in experiment equipment for studying adverse influences on a human body under microgravity and taking a countermeasure against the influences. Further, provided is a method of stimulating cells using a 3D clinostat and ultrasonic waves to study adverse influences on a human body under microgravity and to take a countermeasure against the influences.Type: ApplicationFiled: February 13, 2014Publication date: April 28, 2016Inventors: Han Sung KIM, Ji Hyung PARK, Jong Bum SEO, Sinae EOM, Jung Woo SON, Tae Min SHIN, Dong Hyun SEO, Dong Hyun HWANG, Seong Guk KIM
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Publication number: 20150238996Abstract: A marking system for springs comprises: an arranging apparatus for arranging a spring; and a marking apparatus for applying an identification mark on the spring. The marking apparatus comprises: a frame having a space for marking therein; a pad unit for applying a mark on the spring located in the frame; and an ink unit for supplying ink to the pad unit.Type: ApplicationFiled: February 20, 2015Publication date: August 27, 2015Inventors: Dong Hyun Hwang, Jae Yeol Han
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Patent number: 9069109Abstract: The present invention relates to a planar 3-DOF (degree of freedom) stage, which includes: a transitional manipulator section having parallel 2-DOF; a rotation manipulator section having rotation 1-DOF so as to carry out motion independently from the transitional manipulator section; and a stage base mounted with the transitional manipulator section and the rotation manipulator section and having a fixing section inside and a driving section outside. According to the planar 3-DOF stage, transitional motion and rotational motion are independently carried out so that it is possible to reduce motion errors and simplify control and design.Type: GrantFiled: March 30, 2010Date of Patent: June 30, 2015Assignee: Ajou University Industry-Academic Cooperation FoundationInventors: Dong Hyun Hwang, Moon Gu Lee, Yong Hwan Yoo, Jae Hwa Jeong
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Patent number: 8749423Abstract: An analog to digital converting device includes a first digital conversion (ADC) circuit configured to convert an inputted analog signal into a first digital signal, a first multiplying digital to analog converting (MDAC) circuit configured to amplify a difference between a first converted signal and the inputted analog signal, a second ADC circuit configured to convert an output of the first MDAC circuit into a second digital signal, a second MDAC circuit configured to amplify difference between a second converted signal converted from the second digital signal and the output of the first MDAC circuit, a third ADC circuit configured to convert an output of the second MDAC circuit into a third digital signal, and a common amplifying circuit shared by the first and the second MDAC circuits, wherein the common amplifying circuit consumes current based on which MDAC circuit the common amplifying circuit operates with.Type: GrantFiled: May 24, 2012Date of Patent: June 10, 2014Assignee: SK Hynix Inc.Inventors: Won Seok Hwang, Seung Hoon Lee, Jung Eun Song, Dong Hyun Hwang
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Publication number: 20120299758Abstract: An analog to digital converting device includes a first digital conversion (ADC) circuit configured to convert an inputted analog signal into a first digital signal, a first multiplying digital to analog converting (MDAC) circuit configured to amplify a difference between a first converted signal and the inputted analog signal, a second ADC circuit configured to convert an output of the first MDAC circuit into a second digital signal, a second MDAC circuit configured to amplify difference between a second converted signal converted from the second digital signal and the output of the first MDAC circuit, a third ADC circuit configured to convert an output of the second MDAC circuit into a third digital signal, and a common amplifying circuit shared by the first and the second MDAC circuits, wherein the common amplifying circuit consumes current based on which MDAC circuit the common amplifying circuit operates with.Type: ApplicationFiled: May 24, 2012Publication date: November 29, 2012Applicant: SK HYNIX INC.Inventors: Won Seok HWANG, Seung Hoon LEE, Jung Eun SONG, Dong Hyun HWANG
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Publication number: 20120279344Abstract: The present invention relates to a planar 3-DOF (degree of freedom) stage, which includes: a transitional manipulator section having parallel 2-DOF; a rotation manipulator section having rotation 1-DOF so as to carry out motion independently from the transitional manipulator section; and a stage base mounted with the transitional manipulator section and the rotation manipulator section and having a fixing section inside and a driving section outside. According to the planar 3-DOF stage, transitional motion and rotational motion are independently carried out so that it is possible to reduce motion errors and simplify control and design.Type: ApplicationFiled: March 30, 2010Publication date: November 8, 2012Applicant: AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATIONInventors: Dong Hyun Hwang, Moon Gu Lee, Yong Hwan Yoo, Jae Hwa Jeong