Patents by Inventor Bo Hyun Hwang
Bo 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: 10879861Abstract: A bias circuit of an amplifying device including amplifying circuits and a bypass circuit responding to a first control signal, includes a first bias circuit, a second bias circuit, and a compensating circuit. The first bias circuit is configured to supply a first base bias voltage to a first amplifying circuit of the amplifying circuits in response to a second control signal. The second bias circuit is configured to supply a second base bias voltage to a second amplifying circuit of the amplifying circuits in response to a third control signal. The compensating circuit is connected to either one or both of the first bias circuit and the second bias circuit, and configured to vary an impedance in response to a fourth control signal, and compensate for either one or both of the first base bias voltage and the second base bias voltage based on the varied impedance.Type: GrantFiled: June 28, 2019Date of Patent: December 29, 2020Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Sang Wook Park, Dae Hee No, Hyun Jun Kim, Bo Hyun Hwang, Jun Goo Won, Da Hye Park, Sung Hwan Park, Ki Joong Kim, Yoshiyuki Tonami
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Publication number: 20200287510Abstract: A bias circuit of an amplifying device including amplifying circuits and a bypass circuit responding to a first control signal, includes a first bias circuit, a second bias circuit, and a compensating circuit. The first bias circuit is configured to supply a first base bias voltage to a first amplifying circuit of the amplifying circuits in response to a second control signal. The second bias circuit is configured to supply a second base bias voltage to a second amplifying circuit of the amplifying circuits in response to a third control signal. The compensating circuit is connected to either one or both of the first bias circuit and the second bias circuit, and configured to vary an impedance in response to a fourth control signal, and compensate for either one or both of the first base bias voltage and the second base bias voltage based on the varied impedance.Type: ApplicationFiled: June 28, 2019Publication date: September 10, 2020Applicant: Samsung Electro-Mechanics Co., Ltd.Inventors: Sang Wook PARK, Dae Hee NO, Hyun Jun KIM, Bo Hyun HWANG, Jun Goo WON, Da Hye PARK, Sung Hwan PARK, Ki Joong KIM, Yoshiyuki TONAMI
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Patent number: 10666211Abstract: A power amplifier circuit includes a bias circuit and an amplifier circuit. The bias circuit includes a first bias circuit to receive a reference voltage and an operation voltage and generate a first bias signal, a bias supply circuit to transmit the base bias signal to a base of a power amplifier, based on the first bias signal input from the first bias circuit, a switching control circuit to transmit a switching signal after a preset delay time based on a driving start signal, and a switching circuit connected between an output node of the first bias circuit and a ground, to operate in an ON state after the delay time in response to the switching signal to form a current path between the output node of the first bias circuit and the ground.Type: GrantFiled: June 21, 2018Date of Patent: May 26, 2020Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Bo Hyun Hwang, Dae Hee No, Jun Goo Won, Ki Joong Kim, Sung Hwan Park, Da Hye Park
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Publication number: 20190199303Abstract: A power amplifier circuit includes a bias circuit and an amplifier circuit. The bias circuit includes a first bias circuit to receive a reference voltage and an operation voltage and generate a first bias signal, a bias supply circuit to transmit the base bias signal to a base of a power amplifier, based on the first bias signal input from the first bias circuit , a switching control circuit to transmit a switching signal after a preset delay time based on a driving start signal , and a switching circuit connected between an output node of the first bias circuit and a ground, to operate in an ON state after the delay time in response to the switching signal to form a current path between the output node of the first bias circuit and the ground.Type: ApplicationFiled: June 21, 2018Publication date: June 27, 2019Applicant: Samsung Electro-Mechanics Co., Ltd.Inventors: Bo Hyun HWANG, Dae Hee NO, Jun Goo WON, Ki Joong KIM, Sung Hwan PARK, Da Hye PARK
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Patent number: 9806609Abstract: Disclosed herein is a converter including a switching unit, an energy storage unit for storing energy from a direct current (DC) input voltage and then generating an output voltage according to a switching operation of the switching unit, and a switching controller for controlling the switching unit to selectively execute a first operation mode for turning on the switching unit at a fixed frequency or a second operation mode for turning on the switching unit when a voltage between one end and the other end of the switching unit reaches a zero point of a resonance waveform, wherein the switching controller includes an operation mode selection unit for selectively executing the first operation mode or the second operation mode according to whether the voltage between one end and the other end of the switching unit resonates.Type: GrantFiled: August 10, 2015Date of Patent: October 31, 2017Assignee: Solum Co., LTD.Inventors: Bo Hyun Hwang, Jin Soo Lee, Min Young Ahn, Dae Hoon Han, Jung Eui Park
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Patent number: 9450498Abstract: There is provided a multi-output power supply capable of maintaining power balancing between multiple output powers by fixing a switching duty until a voltage level reaches a predetermined voltage level during an initial stage of a soft-start operation, the multi-output power supply including a power supply unit switching an input power and outputting a plurality of powers having levels determined according to the switching, and a controller controlling a soft switching operation of the power supply unit during an initial operation and fixing a switching duty of the power supply unit to a preset switching duty according to a result of a comparison between a preset reference voltage level and an operating voltage determining whether the soft switching operation is performed or not during the soft switching operation.Type: GrantFiled: February 11, 2013Date of Patent: September 20, 2016Assignee: SOLUM CO., LTDInventors: Dae Hoon Han, Seo Hyung Kim, Jae Shin Lee, Joon Youp Sung, Bo Hyun Hwang, Jung Sun Kwon
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Patent number: 9425699Abstract: There is provided a multi-output power supply apparatus capable of maintaining multiple output voltages in a balanced state by limiting a variable range of a switching duty according to a load state. The multi-output power supply apparatus includes: a power supply unit switching input power to output a plurality of voltages whose power levels are determined according to the switching operation; and a controller detecting power states of at least some of the plurality of voltages from the power supply unit, and limiting a range of a switching duty of the power supply unit to a pre-set range when the detected power states correspond to a pre-set limited power state.Type: GrantFiled: March 15, 2013Date of Patent: August 23, 2016Assignee: SOLUM CO., LTD.Inventors: Dae Hoon Han, Jae Shin Lee, Seo Hyung Kim, Jung Sun Kwon, Bo Hyun Hwang, Joon Youp Sung
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Publication number: 20160199852Abstract: Provided is a cell sorting platform including a housing, a first electrode substrate extending inside the housing, and a second electrode substrate extending inside the housing and disposed parallel to the first electrode substrate with a predetermined gap, facing the first electrode substrate, wherein each electrode is formed at one side of the first electrode substrate and the second electrode substrate, and a plurality of electrode arrays is formed extending with an inclination from each of the electrodes, and a cell sorting method using the same.Type: ApplicationFiled: June 24, 2015Publication date: July 14, 2016Inventors: Byung Kyu Kim, Dong Kyu Lee, Bo Hyun Hwang, Deog Moon Rho, Jun Woo Choi
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Publication number: 20160111955Abstract: Disclosed herein is a converter including a switching unit, an energy storage unit for storing energy from a direct current (DC) input voltage and then generating an output voltage according to a switching operation of the switching unit, and a switching controller for controlling the switching unit to selectively execute a first operation mode for turning on the switching unit at a fixed frequency or a second operation mode for turning on the switching unit when a voltage between one end and the other end of the switching unit reaches a zero point of a resonance waveform, wherein the switching controller includes an operation mode selection unit for selectively executing the first operation mode or the second operation mode according to whether the voltage between one end and the other end of the switching unit resonates.Type: ApplicationFiled: August 10, 2015Publication date: April 21, 2016Applicant: SOLUM CO., LTD.Inventors: Bo Hyun HWANG, Jin Soo LEE, Min Young AHN, Dae Hoon HAN, Jung Eui PARK
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Publication number: 20160105104Abstract: A converter includes a switching unit; an energy storage unit storing energy from DC input power and then generating an output voltage, depending on a switching operation of the switching unit; and a switching control unit turning on the switching unit when a voltage between one terminal and the other terminal of the switching unit reaches a lowest point of a resonance waveform. The switching control unit includes a voltage detection unit detecting the voltage between the one terminal and the other terminal at the time of the resonance waveform; a first signal output unit outputting a first signal when the voltage detected by the voltage detection unit reaches a change point of a slope corresponding to the lowest point of the resonance waveform; and a switching driving unit turning on the switching unit in response to the first signal.Type: ApplicationFiled: August 3, 2015Publication date: April 14, 2016Applicant: SOLUM CO., LTD.Inventors: Bo Hyun HWANG, Jin Soo LEE, Seung Kon KONG, Jung Eui PARK, Min Young AHN
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Publication number: 20160105103Abstract: The converter includes: a switching unit; an energy storing unit storing energy from direct current input power and then generating an output voltage according to a switching operation of the switching unit; and a switching controlling unit turning on the switching unit when a voltage between one end of the switching unit and the other end thereof reaches a zero point of a resonance waveform, wherein the switching controlling unit includes: a voltage detecting unit detecting the voltage one end of the switching unit and the other end thereof in case of a resonance waveform; a first comparator comparing the voltage detected by the voltage detecting unit with a predetermined first reference voltage corresponding to the zero point of the resonance waveform and outputting a first signal according to a comparison result; and a switching driving unit turning on the switching unit in response to the first signal.Type: ApplicationFiled: July 30, 2015Publication date: April 14, 2016Applicant: SOLUM CO., LTD.Inventors: Bo Hyun HWANG, Jin Soo LEE, Seung Kon KONG, Dae Hoon HAN
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Patent number: 9258856Abstract: There is provided a light emitting diode power supply apparatus capable of limiting a rise in a voltage level of a power supplied to a light emitting diode even in the case in which driving of the light emitting diode is stopped for a long period of time. The light emitting diode power supply apparatus includes: a power supply unit supplying a driving power set under a control to a light emitting diode; and a controlling unit selecting one of a detection voltage obtained by detecting a current flowing to the light emitting diode and a voltage provided according to an operation state of the light emitting diode to control a power supply operation of the power supply unit.Type: GrantFiled: September 17, 2013Date of Patent: February 9, 2016Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Dae Hoon Han, Seo Hyung Kim, Jung Sun Kwon, Jung Eui Park, Jin Soo Lee, Bo Hyun Hwang
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Patent number: 9148928Abstract: There is provided a light emitting diode driver capable of improving power efficiency by using a resistor having a low power consumption rating while controlling an LED channel so that it has constant brightness stably. The light emitting diode driver includes: a power supplying unit converting an input voltage into a predetermined driving voltage so as to supply the driving voltage to an LED channel; and a driving unit amplifying a detection voltage detected based on a current from the LED channel by a predetermined gain and controlling the current flowing through the LED channel so that the amplified detection voltage has a level equal to that of a predetermined reference voltage.Type: GrantFiled: January 24, 2014Date of Patent: September 29, 2015Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Jung Eui Park, Jin Soo Lee, Byoung Woo Ryu, Seung Kon Kong, Dae Hoon Han, Bo Hyun Hwang
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Patent number: 9055640Abstract: There is provided a light emitting diode driving apparatus capable of uniformly maintaining current balance between light emitting diode channels. The light emitting diode driving apparatus includes: a DC to DC converting unit converting the direct current power into settable driving power; a detecting unit detecting voltage drops generated in each of a plurality of light emitting diode channels each having a plurality of light emitting diodes; a converting unit converting an analog value into a digital value; and a driving unit differentially setting duty cycles of switching signals according to the digital values from the converting unit to drive the plurality of light emitting diode channels.Type: GrantFiled: June 12, 2012Date of Patent: June 9, 2015Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Jung Eui Park, Bo Hyun Hwang, Seo Hyung Kim, Jae Shin Lee, Dae Hoon Han, Seung Kon Kong
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Publication number: 20150115840Abstract: There is provided a light emitting diode driver capable of improving power efficiency by using a resistor having a low power consumption rating while controlling an LED channel so that it has constant brightness stably. The light emitting diode driver includes: a power supplying unit converting an input voltage into a predetermined driving voltage so as to supply the driving voltage to an LED channel; and a driving unit amplifying a detection voltage detected based on a current from the LED channel by a predetermined gain and controlling the current flowing through the LED channel so that the amplified detection voltage has a level equal to that of a predetermined reference voltage.Type: ApplicationFiled: January 24, 2014Publication date: April 30, 2015Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Jung Eui PARK, Jin Soo Lee, Byoung Woo Ryu, Seung Kon Kong, Dae Hoon Han, Bo Hyun Hwang
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Patent number: 9000677Abstract: There is provided a light emitting diode driving apparatus, including: a power supplying unit converting input power into driving power according to a control and supplying the converted driving power to a light emitting diode channel; a driving unit controlling current flowing in the light emitting diode channel according to a pulse width modulation (PWM) dimming signal from the outside; and a controlling unit comparing a reference level set by a duty of the PWM dimming signal with a detection voltage level of the light emitting diode channel and controlling a power converting operation of the power supplying unit according to the comparison result.Type: GrantFiled: February 11, 2013Date of Patent: April 7, 2015Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Jung Eui Park, Seung Kon Kong, Seo Hyung Kim, Bo Hyun Hwang, Jae Shin Lee
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Publication number: 20150002050Abstract: There is provided a light emitting diode power supply apparatus capable of limiting a rise in a voltage level of a power supplied to a light emitting diode even in the case in which driving of the light emitting diode is stopped for a long period of time. The light emitting diode power supply apparatus includes: a power supply unit supplying a driving power set under a control to a light emitting diode; and a controlling unit selecting one of a detection voltage obtained by detecting a current flowing to the light emitting diode and a voltage provided according to an operation state of the light emitting diode to control a power supply operation of the power supply unit.Type: ApplicationFiled: September 17, 2013Publication date: January 1, 2015Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Dae Hoon HAN, Seo Hyung KIM, Jung Sun KWON, Jung Eui PARK, Jin Soo LEE, Bo Hyun HWANG
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Publication number: 20140160806Abstract: There is provided a multi-output power supply apparatus capable of maintaining multiple output voltages in a balanced state by limiting a variable range of a switching duty according to a load state. The multi-output power supply apparatus includes: a power supply unit switching input power to output a plurality of voltages whose power levels are determined according to the switching operation; and a controller detecting power states of at least some of the plurality of voltages from the power supply unit, and limiting a range of a switching duty of the power supply unit to a pre-set range when the detected power states correspond to a pre-set limited power state.Type: ApplicationFiled: March 15, 2013Publication date: June 12, 2014Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Dae Hoon HAN, Jae Shin LEE, Seo Hyung KIM, Jung Sun KWON, Bo Hyun HWANG, Joon Youp SUNG
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Publication number: 20140139131Abstract: There is provided a light emitting diode driving apparatus, including: a power supplying unit converting input power into driving power according to a control and supplying the converted driving power to a light emitting diode channel; a driving unit controlling current flowing in the light emitting diode channel according to a pulse width modulation (PWM) dimming signal from the outside; and a controlling unit comparing a reference level set by a duty of the PWM dimming signal with a detection voltage level of the light emitting diode channel and controlling a power converting operation of the power supplying unit according to the comparison result.Type: ApplicationFiled: February 11, 2013Publication date: May 22, 2014Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Jung Eui PARK, Seung Kon KONG, Seo Hyung KIM, Bo Hyun HWANG, Jae Shin LEE
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Publication number: 20140139021Abstract: There is provided a multi-output power supply capable of maintaining power balancing between multiple output powers by fixing a switching duty until a voltage level reaches a predetermined voltage level during an initial stage of a soft-start operation, the multi-output power supply including a power supply unit switching an input power and outputting a plurality of powers having levels determined according to the switching, and a controller controlling a soft switching operation of the power supply unit during an initial operation and fixing a switching duty of the power supply unit to a preset switching duty according to a result of a comparison between a preset reference voltage level and an operating voltage determining whether the soft switching operation is performed or not during the soft switching operation.Type: ApplicationFiled: February 11, 2013Publication date: May 22, 2014Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Dae Hoon HAN, Seo Hyung KIM, Jae Shin LEE, Joon Youp SUNG, Bo Hyun HWANG, Jung Sun KWON