Patents by Inventor Gyeong Ho Lee
Gyeong Ho Lee 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: 11956980Abstract: Discussed is an organic light emitting device in which a light emitting layer includes a host and different kinds of dopants, the fluorescent dopant is formed of a material having energy level properties facilitating thermally activated delayed fluorescence (TADF), and thus energy is concentratedly transferred to the fluorescent dopant so as to increase luminous efficacy of a single color.Type: GrantFiled: December 24, 2020Date of Patent: April 9, 2024Assignee: LG DISPLAY CO., LTD.Inventors: Gyeong-Woo Kim, Hong-Seok Choi, Seung-Ryong Joung, Jun-Ho Lee, Yoon-Deok Han, Hee-Su Byeon
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Patent number: 11919317Abstract: An inkjet printing apparatus, method of printing ink using the same and method of fabricating display device are provided. The method of printing ink includes: ejecting ink in which a plurality of particles is dispersed from an inkjet head; irradiating the ejected ink with a first light and a second light having different wavelengths to acquire data on a first exit light and a second exit light emitted from the ink; calculating a concentration of the particles in the ink from the data on the first exit light and the second exit light; and checking whether the concentration is out of an error range from a reference value, where the first light has a wavelength of about 500 nm or less, and the second light has a wavelength of about 1000 nm or more.Type: GrantFiled: March 23, 2022Date of Patent: March 5, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Dong Jun Lee, Che Ho Lim, Ho Yong Shin, Gyeong Eun Eoh, Jun Hwi Lim, Seon Uk Lee
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Publication number: 20220336123Abstract: Disclosed is an disclosure pertaining to a cooling apparatus for a superconductor cooling container. The disclosed cooling apparatus for a superconductor cooling container comprises: an inner container which is disposed in an outer container and in which a superconductor is immersed in a liquid refrigerant; a refrigerator disposed outside the outer container to generate cold air; and a cryogenic maintenance device which is connected to the refrigerator and maintains the inside of the inner container in a cryogenic state.Type: ApplicationFiled: September 23, 2020Publication date: October 20, 2022Inventors: Min-Jee KIM, Gyeong-Ho LEE
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Patent number: 11049677Abstract: The DC interrupting device includes a main current conduction unit including a main interrupting switch, which is a mechanical switch, a reverse current power supply unit connected to an input terminal of the main current conduction unit and configured to generate a predetermined reverse current, and a reverse current conduction unit configured to supply the reverse current to an output terminal of the main current conduction unit. The reverse current power supply unit includes a first reverse current dedicated capacitor charged by a voltage applied to an input terminal of the main current conduction unit, a polarity reversing inductor configured to reverse a polarity of the first reverse current dedicated capacitor, and a reverse current power supply unit switch configured to perform circuit connection such that the polarity reversing inductor reverses the polarity of the first reverse current dedicated capacitor.Type: GrantFiled: December 19, 2017Date of Patent: June 29, 2021Assignees: KOREA ELECTRO TECHNOLOGY RESEARCH INSTITUTE, LSIS CO., LTD.Inventors: Woo Young Lee, Hae Yong Park, Gyeong Ho Lee, Sang Hun Park, Chae Yoon Bae, Jung Wook Sim, Hyun Jae Jang
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Patent number: 10818454Abstract: A high speed switch comprises an interrupter unit connected to a main circuit and including a movable electrode and a driving electrode for opening or closing the main circuit; a driving unit including a repulsion coil for providing a driving force for moving the movable electrode of the interrupter unit, and a repulsion plate disposed opposite to the repulsion coil; a guide rod part connecting the movable electrode of the interrupter unit to the repulsion plate, having a latch groove formed therein, and reciprocating vertically according to movements of the repulsion plate; and a state-holding unit for regulating the movement of the guide rod part, wherein the state-holding unit comprises: a latch pin; a latch elastic member; and a latch coil.Type: GrantFiled: August 11, 2017Date of Patent: October 27, 2020Assignee: LSIS CO., LTD.Inventors: Hae-Yong Park, Jung-Wook Sim, Gyeong-Ho Lee
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Publication number: 20200075274Abstract: A high speed switch comprises an interrupter unit connected to a main circuit and including a movable electrode and a driving electrode for opening or closing the main circuit; a driving unit including a repulsion coil for providing a driving force for moving the movable electrode of the interrupter unit, and a repulsion plate disposed opposite to the repulsion coil; a guide rod part connecting the movable electrode of the interrupter unit to the repulsion plate, having a latch groove formed therein, and reciprocating vertically according to movements of the repulsion plate; and a state-holding unit for regulating the movement of the guide rod part, wherein the state-holding unit comprises: a latch; a latch elastic member; and a latch coil.Type: ApplicationFiled: August 11, 2017Publication date: March 5, 2020Inventors: Hae-Yong PARK, Jung-Wook SIM, Gyeong-Ho LEE
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Publication number: 20190362916Abstract: The DC interrupting device includes a main current conduction unit including a main interrupting switch, which is a mechanical switch, a reverse current power supply unit connected to an input terminal of the main current conduction unit and configured to generate a predetermined reverse current, and a reverse current conduction unit configured to supply the reverse current to an output terminal of the main current conduction unit. The reverse current power supply unit includes a first reverse current dedicated capacitor charged by a voltage applied to an input terminal of the main current conduction unit, a polarity reversing inductor configured to reverse a polarity of the first reverse current dedicated capacitor, and a reverse current power supply unit switch configured to perform circuit connection such that the polarity reversing inductor reverses the polarity of the first reverse current dedicated capacitor.Type: ApplicationFiled: December 19, 2017Publication date: November 28, 2019Applicants: KOREA ELECTRO TECHNOLOGY RESEARCH INSTITUTE, LSIS CO., LTD.Inventors: Woo Young LEE, Hae Yong PARK, Gyeong Ho LEE, Sang Hun PARK, Chae Yoon BAE, Jung Wook SIM, Hyun Jae JANG
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Patent number: 10191120Abstract: An apparatus for detecting a defect of an electric power system according to one embodiment of the present disclosure includes a first state signal output unit for outputting a first state signal corresponding to a magnetic force generated at a periphery of a line, a second state signal output unit for outputting a second state signal based on a magnitude of a line current and an increase ratio thereof, and a determination unit for determining whether the electric power system is defective or not based on the first state signal and the second state signal.Type: GrantFiled: December 19, 2016Date of Patent: January 29, 2019Assignee: LSIS CO., LTD.Inventors: Hae-Yong Park, Chae-Yoon Bae, Jung-Wook Sim, Gyeong-Ho Lee
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Patent number: 10116132Abstract: Disclosed is a direct current (DC) circuit breaker including a first line in which a first high-speed switch and a power semiconductor switch are connected in series; a second line in which a plurality of second high-speed switches, a plurality of pairs of a first non-linear resistor and a power fuse connected in parallel, and a resistor are connected in series; and a third line including a second non-linear resistor. The first line, the second line, and the third line are connected in parallel.Type: GrantFiled: October 9, 2015Date of Patent: October 30, 2018Assignee: LSIS CO., LTD.Inventors: Gyeong-Ho Lee, Jung-Wook Sim, Hae-Yong Park
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Patent number: 10063046Abstract: Some embodiments of the present disclosure relate to a direct current circuit breaker capable of shortening a cut-off operation time and reducing a magnitude of a required reverse current. The direct current circuit breaker includes: a main circuit line which is connected between a power supply and a load, the main circuit line includes a main breaker and a first diode connected in parallel; a charging circuit line which is disposed in the rear stage of the main breaker and is connected in parallel to the load, the charging circuit line includes a first capacitor, a reactor and a second diode connected in series; and a switch line including one end connected in parallel to the front stage of the main breaker and the other end connected between the reactor and the second diode, the switch line includes a third diode and a current switch connected in series.Type: GrantFiled: April 29, 2016Date of Patent: August 28, 2018Assignee: LSIS CO., LTD.Inventors: Gyeong-Ho Lee, Jung-Wook Sim, Chae-Yoon Bae, Hae-Yong Park
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Publication number: 20170248660Abstract: An apparatus for detecting a defect of an electric power system according to one embodiment of the present disclosure includes a first state signal output unit for outputting a first state signal corresponding to a magnetic force generated at a periphery of a line, a second state signal output unit for outputting a second state signal based on a magnitude of a line current and an increase ratio thereof, and a determination unit for determining whether the electric power system is defective or not based on the first state signal and the second state signal.Type: ApplicationFiled: December 19, 2016Publication date: August 31, 2017Inventors: Hae-Yong PARK, Chae-Yoon BAE, Jung-Wook SIM, Gyeong-Ho LEE
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Patent number: 9599654Abstract: A fault current detection circuit comprises a primary current transformer that detects a current; a pair of secondary current transformers that convert a current detection signal into secondary conversion signals with a small current; a fault detection circuit section that determines whether or not a fault current occurs by comparing a current value according to a secondary conversion signal with a predetermined reference current value; a surge detection circuit section that determines whether or not a surge current occurs on the electric power circuit; and a trip determination unit that receives a fault detection signal and a surge detection signal, and generates a trip control signal when at least either one of the fault detection signal and the surge detection signal is received.Type: GrantFiled: July 7, 2015Date of Patent: March 21, 2017Assignee: LSIS CO., LTD.Inventors: Hae Yong Park, Jung Wook Sim, Gyeong Ho Lee
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Publication number: 20160336734Abstract: Some embodiments of the present disclosure relate to a direct current circuit breaker capable of shortening a cut-off operation time and reducing a magnitude of a required reverse current. The direct current circuit breaker includes: a main circuit line which is connected between a power supply and a load, the main circuit line includes a main breaker and a first diode connected in parallel; a charging circuit line which is disposed in the rear stage of the main breaker and is connected in parallel to the load, the charging circuit line includes a first capacitor, a reactor and a second diode connected in series; and a switch line including one end connected in parallel to the front stage of the main breaker and the other end connected between the reactor and the second diode, the switch line includes a third diode and a current switch connected in series.Type: ApplicationFiled: April 29, 2016Publication date: November 17, 2016Inventors: Gyeong-Ho LEE, Jung-Wook SIM, Chae-Yoon BAE, Hae-Yong PARK
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Patent number: 9490628Abstract: A fault current limiter is provided. According to an embodiment of the present disclosure, the fault current limiter includes a switch whose contact point is opened when a fault current occurs; a current limiting element configured to limit the fault current when the fault current occurs; and a diode being serial-connected to the current limiting element, wherein a breakdown voltage of the diode is higher than a voltage drop by an impedance of the switch when a normal current flows.Type: GrantFiled: October 30, 2014Date of Patent: November 8, 2016Assignee: LSIS CO., LTD.Inventors: Jung Wook Sim, Gyeong Ho Lee, Hae Yong Park
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Patent number: 9478383Abstract: The fast switch includes: a housing; a vacuum interrupter installed in the housing, connected to a main circuit, and configured to open and close the main circuit; a contact spring coupled to a mover of the vacuum interrupter, and configured to provide a contact force; an insulating rod connected to the contact spring; a permanent magnet actuator connected to a lower end of the insulating rod, and configured to provide a switching driving force; a first capacitor configured to provide a discharge current to a coil of the permanent magnet actuator; a driving coil connected to a lower end of the permanent magnet actuator; and a second capacitor configured to provide a discharge current to the driving coil.Type: GrantFiled: March 23, 2015Date of Patent: October 25, 2016Assignee: LSIS CO., LTD.Inventors: Gyeong Ho Lee, Jung Wook Sim, Hae Yong Park
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Publication number: 20160105014Abstract: Disclosed is a direct current (DC) circuit breaker including a first line in which a first high-speed switch and a power semiconductor switch are connected in series; a second line in which a plurality of second high-speed switches, a plurality of pairs of a first non-linear resistor and a power fuse connected in parallel, and a resistor are connected in series; and a third line including a second non-linear resistor. The first line, the second line, and the third line are connected in parallel.Type: ApplicationFiled: October 9, 2015Publication date: April 14, 2016Inventors: Gyeong-Ho Lee, Jung-Wook Sim, Hae-Yong Park
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Publication number: 20160018457Abstract: A fault current detection circuit according to the invention comprises a primary current transformer that detects a current; a pair of secondary current transformers that convert a current detection signal into secondary conversion signals with a small current; a fault detection circuit section that determines whether or not a fault current occurs by comparing a current value according to a secondary conversion signal with a predetermined reference current value; a surge detection circuit section that determines whether or not a surge current occurs on the electric power circuit; and a trip determination unit that receives a fault detection signal and a surge detection signal, and generates a trip control signal when at least either one of the fault detection signal and the surge detection signal is received.Type: ApplicationFiled: July 7, 2015Publication date: January 21, 2016Applicant: LSIS CO., LTD.Inventors: Hae Yong PARK, Jung Wook SIM, Gyeong Ho LEE
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Publication number: 20150332884Abstract: The fast switch includes: a housing; a vacuum interrupter installed in the housing, connected to a main circuit, and configured to open and close the main circuit; a contact spring coupled to a mover of the vacuum interrupter, and configured to provide a contact force; an insulating rod connected to the contact spring; a permanent magnet actuator connected to a lower end of the insulating rod, and configured to provide a switching driving force; a first capacitor configured to provide a discharge current to a coil of the permanent magnet actuator; a driving coil connected to a lower end of the permanent magnet actuator; and a second capacitor configured to provide a discharge current to the driving coil.Type: ApplicationFiled: March 23, 2015Publication date: November 19, 2015Applicant: LSIS CO., LTD.Inventors: Gyeong Ho LEE, Jung Wook SIM, Hae Yong PARK
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Patent number: 9093838Abstract: The fault current detecting circuit includes: a current detection unit that outputs a current detection signal; a first comparing circuit unit that compares the current detection signal with a predetermined reference current value and outputs a first output signal; a differentiator that differentiates the current detection signal to output a change slope of the current detection signal; a second comparing circuit unit that compares the change slope with a predetermined reference change slope value and outputs a second output signal; a third comparing circuit unit that compares the current detection signal with a predetermined current detection limit reference value and output a third output signal; and a trip determining unit that outputs a trip control signal only when the first output signal and the second output signal are maintained to be received and the third output signal is not received.Type: GrantFiled: October 10, 2013Date of Patent: July 28, 2015Assignee: LSIS Co., Ltd.Inventors: Seung Hyun Bang, Hae Yong Park, Gyeong Ho Lee, Jung Wook Sim, Won Joon Choe, Min Jee Kim
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Publication number: 20150138683Abstract: A fault current limiter is provided. According to an embodiment of the present disclosure, the fault current limiter includes a switch whose contact point is opened when a fault current occurs; a current limiting element configured to limit the fault current when the fault current occurs; and a diode being serial-connected to the current limiting element, wherein a breakdown voltage of the diode is higher than a voltage drop by an impedance of the switch when a normal current flows.Type: ApplicationFiled: October 30, 2014Publication date: May 21, 2015Applicant: LSIS CO., LTD.Inventors: Jung Wook SIM, Gyeong Ho LEE, Hae Yong PARK