Patents by Inventor Keun Wook LEE
Keun Wook 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).
-
Publication number: 20240107808Abstract: A light emitting display device includes: a light emitting element; a second transistor connected to a scan line; a first transistor which applies a current to the light emitting element; a capacitor connected to a gate electrode of the first transistor; and a third transistor connected to an output electrode of the first transistor and the gate electrode of the first transistor. Channels of the second transistor, the first transistor, and the third transistor are disposed in a polycrystalline semiconductor layer, and a width of a channel of the third transistor is in a range of about 1 ?m to about 2 ?m, and a length of the channel of the third transistor is in a range of about 1 ?m to about 2.5 ?m.Type: ApplicationFiled: November 30, 2023Publication date: March 28, 2024Inventors: Keun Woo KIM, Tae Wook KANG, Han Bit KIM, Bum Mo SUNG, Do Kyeong LEE, Jae Seob LEE
-
Patent number: 11927764Abstract: Disclosed is a head mounted display device. The head mounted display device includes a head mount unit wearable on a head of a user, a display unit supported on the head mount unit and sending an image to eyes of the user, and a position adjustment unit coupled to the head mount unit, connected to the display unit, and moving the display unit relative to the head mount unit such that a position of the display unit varies with respect to the eyes of the user.Type: GrantFiled: August 24, 2021Date of Patent: March 12, 2024Assignee: MEGAGEN IMPLANT CO., LTD.Inventors: Kwang Bum Park, Hyun Wook An, Keun Oh Park, Tae Gyoun Lee
-
Publication number: 20230006295Abstract: A battery pack for efficiently supplying a power to a vehicle and including a battery assembly, a power supply terminal connectable to a connection terminal of the vehicle that is connected to a vehicle control unit and a vehicle motor, a power supply path located between the power supply terminal and the battery cell and supplying a power from the battery cell to the power supply terminal, a switching unit provided on the power supply path electrically turn on/off the power supply path, a mounting recognition unit recognizing whether the battery pack is mounted to the vehicle, and a processor controlling the switching unit so that a power is supplied from the battery cell to the vehicle control unit, when receiving a signal from the mounting recognition unit that the battery pack is recognized as being mounted to the vehicle.Type: ApplicationFiled: April 7, 2021Publication date: January 5, 2023Applicant: LG ENERGY SOLUTION, LTD.Inventor: Keun-Wook LEE
-
Publication number: 20220396175Abstract: A battery pack for a vehicle, which allows smooth communication and power connection to the vehicle when mounted to an electric vehicle. The battery pack includes a vehicle controller, an auxiliary battery and a vehicle memory to supply a driving power to the motor, and also includes a battery cell; a power supply terminal; a power supply path; a switch; a memory reader configured to read charging information stored in the vehicle memory; and a processor configured to control the switch to supply a power from the battery cell to the auxiliary battery, based on the charging information of the auxiliary battery read by the memory reader.Type: ApplicationFiled: August 13, 2021Publication date: December 15, 2022Applicant: LG ENERGY SOLUTION, LTD.Inventors: Duk-You KIM, Keun-Wook LEE, Jung-Hoon LEE
-
Publication number: 20220294039Abstract: Disclosed is a battery management system and a battery pack and the battery management system includes: a pack voltage sampling unit for periodically sampling a pack voltage of a battery pack; a pack current sampling unit for sampling a pack current of the battery pack; and a control unit for, when the pack voltage sampling of the battery pack is completed, recording a time from a sampling start time of the pack voltage to a sampling completion time of the pack voltage as a first time, and transmitting a voltage sampling synchronization signal for measuring a cell voltage of a battery cell to a plurality of lower-level battery management systems.Type: ApplicationFiled: July 23, 2020Publication date: September 15, 2022Applicant: LG ENERGY SOLUTION, LTD.Inventors: Hyun Ki CHO, Jae Dong PARK, Keun Wook LEE
-
Publication number: 20220294252Abstract: Discussed is a battery management apparatus which includes a battery management system that monitors a state of a battery, and a power receiving device that wirelessly receives power from a power transmitting device, where the battery management system calculates an optimum charging condition for the battery based on data on the state of the battery and power transmission performance of the power transmitting device.Type: ApplicationFiled: September 7, 2020Publication date: September 15, 2022Applicant: LG ENERGY SOLUTION, LTD.Inventors: Hyun Ki CHO, Sang Hoon LEE, Jae Dong PARK, Keun Wook LEE, Ji Eun KIM, Chan Ha PARK, Sung Gun LEE, Seong Yeol YANG
-
Patent number: 11125824Abstract: A master battery management unit including a sensing unit generating pack information of the battery pack, a first master power supply unit generating a first operating voltage using voltage of the battery pack, a communication unit outputting a first switching signal in response to the first operating voltage supplied from the first master power supply unit, a second master power supply unit generating a second operating voltage using the pack voltage in response to the first switching signal, and a control unit operating using the second operating voltage supplied from the second master power supply unit, and testing a preset item based on at least one of the pack information and module information.Type: GrantFiled: June 14, 2018Date of Patent: September 21, 2021Assignee: LG CHEM, LTD.Inventors: Keun-Wook Lee, Sang-Hoon Lee, Hyun-Ki Cho, Yean-Sik Choi
-
Patent number: 11070067Abstract: A battery management unit for a battery module, the battery management unit including a sensing unit electrically connected to a plurality of battery cells, the sensing unit detecting voltage of each battery cell of the plurality of battery cells and outputting a detection signal including voltage information representing the detected voltage, a first power supply unit generating a first operating voltage using a module voltage of the battery module, and a communication unit which operates using the first operating voltage, the communication unit including an antenna, a wireless communication circuit and a first input port, the communication unit receiving the detection signal from the sensing unit through the first input port, testing at least one preset item based on the detection signal, and outputting a RF signal representing a result of the testing through the antenna and the wireless communication circuit.Type: GrantFiled: June 14, 2018Date of Patent: July 20, 2021Assignee: LG CHEM, LTD.Inventors: Keun-Wook Lee, Sang-Hoon Lee, Yean-Sik Choi
-
Publication number: 20190361075Abstract: A master battery management unit including a sensing unit generating pack information of the battery pack, a first master power supply unit generating a first operating voltage using voltage of the battery pack, a communication unit outputting a first switching signal in response to the first operating voltage supplied from the first master power supply unit, a second master power supply unit generating a second operating voltage using the pack voltage in response to the first switching signal, and a control unit operating using the second operating voltage supplied from the second master power supply unit, and testing a preset item based on at least one of the pack information and module information.Type: ApplicationFiled: June 14, 2018Publication date: November 28, 2019Applicant: LG CHEM, LTD.Inventors: Keun-Wook LEE, Sang-Hoon LEE, Hyun-Ki CHO, Yean-Sik CHOI
-
Publication number: 20190356143Abstract: A battery management unit including a sensing unit electrically connected to a plurality of battery cells, the sensing unit detecting voltage of each of the plurality of battery cells and outputting a detection signal including voltage information representing the detected voltage, a first power supply unit generating a first operating voltage using a module voltage of the battery module, and a communication unit which operates using the first operating voltage, the communication unit including an antenna, a wireless communication circuit and a first input port, the communication unit receiving the detection signal from the sensing unit through the first input port, testing at least one preset item based on the detection signal, and outputting a RF signal representing a result of the test through the antenna and the wireless communication circuit.Type: ApplicationFiled: June 14, 2018Publication date: November 21, 2019Applicant: LG CHEM, LTD.Inventors: Keun-Wook LEE, Sang-Hoon LEE, Yean-Sik CHOI
-
Patent number: 9450495Abstract: There is provided a single stage forward-flyback converter including a power converting unit switching input power to perform a forward power conversion operation while being switched on and perform a flyback power conversion operation while being switched off, a path providing unit clamping power formed by the forward power conversion operation of the power converting unit and power formed by the flyback power conversion operation thereof to provide power transfer paths, and a controlling unit controlling the power conversion operation of the power converting unit according to a voltage level of the input power.Type: GrantFiled: June 27, 2013Date of Patent: September 20, 2016Assignee: SOLUM CO., LTDInventors: Sang Kyoo Han, Byoung Woo Ryu, Heung Gyoon Choi, Keun Wook Lee, Hong Sun Park
-
Patent number: 9357595Abstract: A light emitting diode driver includes a power supplying unit receiving an alternating current (AC) power and outputting a transformed power according to a predetermined ratio, a rectifying unit rectifying the output power from the power supplying unit, and a double voltage unit receiving the rectified power from the rectifying unit and generating an output voltage such that the level of the output voltage is variable, and has constant duty and frequency thereof even the variance of the voltage level.Type: GrantFiled: October 14, 2014Date of Patent: May 31, 2016Assignee: Solum Co., Ltd.Inventors: Keun Wook Lee, Byoung Woo Ryu
-
Publication number: 20150115824Abstract: A light emitting diode driver includes a power supplying unit receiving an alternating current (AC) power and outputting a transformed power according to a predetermined ratio, a rectifying unit rectifying the output power from the power supplying unit, and a double voltage unit receiving the rectified power from the rectifying unit and generating an output voltage such that the level of the output voltage is variable, and has constant duty and frequency thereof even the variance of the voltage level.Type: ApplicationFiled: October 14, 2014Publication date: April 30, 2015Inventors: Keun Wook LEE, Byoung Woo RYU
-
Publication number: 20140184093Abstract: There is provided a single stage forward-flyback converter including a power converting unit switching input power to perform a forward power conversion operation while being switched on and perform a flyback power conversion operation while being switched off, a path providing unit clamping power formed by the forward power conversion operation of the power converting unit and power formed by the flyback power conversion operation thereof to provide power transfer paths, and a controlling unit controlling the power conversion operation of the power converting unit according to a voltage level of the input power.Type: ApplicationFiled: June 27, 2013Publication date: July 3, 2014Inventors: Sang Kyoo HAN, Byoung Woo RYU, Heung Gyoon CHOI, Keun Wook LEE, Hong Sun PARK
-
Publication number: 20140159603Abstract: There are provided an LED driving apparatus and an LED driving method. The LED driving apparatus includes a rectifying unit rectifying AC power; a light emitting unit including a plurality of light emitting diodes; a switching unit including a plurality of switching elements connected to the plurality of light emitting diodes; and a controlling unit controlling operations of the plurality of light emitting diodes, wherein the controlling unit controls a duty ratio of a turned-on switching element based on a level of the AC power within respective turning-on periods of the plurality of switching elements.Type: ApplicationFiled: April 19, 2013Publication date: June 12, 2014Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Keun Wook LEE, Byoung Woo RYU, Hong Sun PARK, Heung Gyoon CHOI