Patents by Inventor Hyun Gu Kang
Hyun Gu Kang 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: 20240132357Abstract: An embodiment of the present specification provides a method for preparing a catalyst for preparing a carbon nanotube, comprising: (a) dissolving a main catalyst precursor, a support precursor, a cocatalyst precursor and a precipitation inhibitor in a solvent to prepare a precursor solution; and (b) pyrolyzing the precursor solution by spraying the precursor solution into a reactor, wherein a mole fraction of the precipitation inhibitor to the cocatalyst precursor is 0.1 to 1.5.Type: ApplicationFiled: October 19, 2023Publication date: April 25, 2024Applicant: KOREA KUMHO PETROCHEMICAL CO., LTD.Inventors: Myung Hoon JEONG, Hyun Tae KIM, Sang Hyo RYU, Chung Heon JEONG, Wan Sung LEE, Woo Ram JUNG, Chang Gu KANG
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Publication number: 20210286422Abstract: A data processing device communicating with a memory device via a memory interface includes: at least one data processor configured to generate first data; a data converter configured to generate second data written to the memory device from the first data; and a controller configured to enable the data converter to generate the second data having a size less than that of the first data to reduce power consumption in at least one of the memory device or the memory interface.Type: ApplicationFiled: June 1, 2021Publication date: September 16, 2021Inventors: HYUN-GU KANG, SE-HYOUNG KIM
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Patent number: 11048319Abstract: A data processing device communicating with a memory device via a memory interface includes: at least one data processor configured to generate first data; a data converter configured to generate second data written to the memory device from the first data; and a controller configured to enable the data converter to generate the second data having a size less than that of the first data.Type: GrantFiled: June 28, 2019Date of Patent: June 29, 2021Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hyun-Gu Kang, Se-Hyoung Kim
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Patent number: 10643699Abstract: The present disclosure discloses a feedback field-effect array device capable of converting between volatile and non-volatile operations and an array circuit using the same. According to one embodiment of the present disclosure, the array circuit may include a plurality of feedback field-effect array devices, wherein the source region of the feedback field-effect electronic device and the drain region of an access electronic device may be connected to each other in series, the feedback field-effect electronic device may be connected to a bit line and a first word line, the access electronic device may be connected to a source line and a second word line, and any one of first and second gate voltages may be applied to the first word line to store data in a first logic state or data in a second logic state.Type: GrantFiled: November 6, 2018Date of Patent: May 5, 2020Assignee: Korea University Research and Business FoundationInventors: Sang Sig Kim, Kyoung Ah Cho, Hyun Gu Kang, Jin Sun Cho, Doo Hyeok Lim, Yoon Joong Kim, Sol A Woo
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Publication number: 20200097175Abstract: A data processing device communicating with a memory device via a memory interface includes: at least one data processor configured to generate first data; a data converter configured to generate second data written to the memory device from the first data; and a controller configured to enable the data converter to generate the second data having a size less than that of the first data to reduce power consumption in at least one of the memory device or the memory interface.Type: ApplicationFiled: June 28, 2019Publication date: March 26, 2020Inventors: Hyun-Gu KANG, Se-Hyoung KIM
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Publication number: 20200075098Abstract: The present disclosure discloses a feedback field-effect array device capable of converting between volatile and non-volatile operations and an array circuit using the same. According to one embodiment of the present disclosure, the array circuit may include a plurality of feedback field-effect array devices, wherein the source region of the feedback field-effect electronic device and the drain region of an access electronic device may be connected to each other in series, the feedback field-effect electronic device may be connected to a bit line and a first word line, the access electronic device may be connected to a source line and a second word line, and any one of first and second gate voltages may be applied to the first word line to store data in a first logic state or data in a second logic state.Type: ApplicationFiled: November 6, 2018Publication date: March 5, 2020Applicant: Korea University Research and Business FoundationInventors: Sang Sig KIM, Kyoung Ah CHO, Hyun Gu KANG, Jin Sun CHO, Doo Hyeok LIM, Yoon Joong KIM, Sol A WOO
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Patent number: 10080267Abstract: An AC-driven LED lighting apparatus includes: a triac dimmer to generate a modulated AC voltage by modulating a phase of AC power according to a selected level of dimming; a rectifying circuit to generate drive voltage by full-wave-rectifying the AC voltage having the phase modulated by the triac dimmer; a dimming level detector to detect a dimming level according to the drive voltage; a phase cut reference setting unit for setting a phase cut reference value; and a LED driving module for constant-current-controlling a plurality of LED groups by comparing the detected dimming level with the phase cut reference value, wherein the light emitting element driving module comprises a LED current blocking unit for blocking a drive current supplied to the plurality of LED groups when the dimming level is lower than the phase cut reference value.Type: GrantFiled: June 4, 2015Date of Patent: September 18, 2018Assignee: Seoul Semiconductor Co., Ltd.Inventors: Hyung Jin Lee, Hyun Gu Kang, Sang Wook Han
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Patent number: 10028344Abstract: A lighting apparatus includes a light-emitting diode (LED) array, a rectifying unit configured to rectify an alternating current (AC) voltage and to generate a driving voltage for the LED array, a switch control signal generation unit configured to generate a switching control signal depending on the driving voltage, the switching control signal including connection control signals and a compensation control signal, connection changing units configured to change a connection between the LEDs according to the connection control signals, and a light output compensation unit configured to generate a compensation voltage according to the compensation control signal, and selectively supply the compensation voltage to the LED array.Type: GrantFiled: June 24, 2016Date of Patent: July 17, 2018Assignee: Seoul Semiconductor Co., Ltd.Inventors: Hye Man Jung, Hyun Gu Kang, Oh Seok Kim, Young Eun Yang
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Publication number: 20180160497Abstract: An AC-driven LED lighting apparatus includes: a triac dimmer to generate a modulated AC voltage by modulating a phase of AC power according to a selected level of dimming; a rectifying circuit to generate drive voltage by full-wave-rectifying the AC voltage having the phase modulated by the triac dimmer; a dimming level detector to detect a dimming level according to the drive voltage; a phase cut reference setting unit for setting a phase cut reference value; and a LED driving module for constant-current-controlling a plurality of LED groups by comparing the detected dimming level with the phase cut reference value, wherein the light emitting element driving module comprises a LED current blocking unit for blocking a drive current supplied to the plurality of LED groups when the dimming level is lower than the phase cut reference value.Type: ApplicationFiled: June 4, 2015Publication date: June 7, 2018Inventors: Hyung Jin LEE, Hyun Gu KANG, Sang Wook HAN
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Patent number: 9807828Abstract: An LED lighting apparatus according to exemplary embodiments includes a rectification circuit configured to rectify a modulated AC voltage to generate a drive voltage, an LED driving module connected to a plurality of LED groups and configured to apply a drive current to at least one of the plurality of LED groups according to a level of the drive voltage, and a dimming level detector configured to detect a dimming level corresponding to the drive voltage. The LED driving module is configured to compare the detected dimming level to a reference value and block the drive current based on a result of the comparison.Type: GrantFiled: February 21, 2017Date of Patent: October 31, 2017Assignee: Seoul Semiconductor Co., Ltd.Inventors: Hyung Jin Lee, Hyun Gu Kang, Sang Wook Han
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Patent number: 9713213Abstract: An LED luminescence apparatus is provided, which includes a rectifying unit rectifying an AC voltage and generating a rectified voltage; a plurality of LEDs connected in series to an output terminal of the rectifying unit; a plurality of switches having drain terminals connected to cathodes of the plurality of LEDs, respectively; and a switch control unit sensing current through a plurality of resistors connected to source terminals of the plurality of switches, respectively, comparing the sensed current with a set reference current, and outputting a voltage corresponding to a difference between the sensed current and the set reference current to a gate terminal of each of the plurality of switches.Type: GrantFiled: October 18, 2016Date of Patent: July 18, 2017Assignee: Seoul Semiconductor Co., Ltd.Inventors: Hye Man Jung, Hyun Gu Kang, Snag Wook Han, Young Do Jung
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Publication number: 20170164435Abstract: An LED lighting apparatus according to exemplary embodiments includes a rectification circuit configured to rectify a modulated AC voltage to generate a drive voltage, an LED driving module connected to a plurality of LED groups and configured to apply a drive current to at least one of the plurality of LED groups according to a level of the drive voltage, and a dimming level detector configured to detect a dimming level corresponding to the drive voltage. The LED driving module is configured to compare the detected dimming level to a reference value and block the drive current based on a result of the comparison.Type: ApplicationFiled: February 21, 2017Publication date: June 8, 2017Inventors: Hyung Jin LEE, Hyun Gu Kang, Sang Wook Han
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Patent number: 9674912Abstract: A light-emitting diode (LED) driving circuit configured to drive LED units includes a rectification circuit unit to receive an alternating current (AC) power voltage and rectify the AC power voltage to output a unidirectional ripple voltage, a pulse-width modulation (PWM) signal generation unit to generate PWM decision signals. The PWM signal generation unit is configured to sequentially drive the LEDs according to the PWM decision signals.Type: GrantFiled: June 25, 2015Date of Patent: June 6, 2017Assignee: Seoul Semiconductor Co., Ltd.Inventors: Young Do Jong, Hyun Gu Kang, Hye Man Jung, Kang Nyung Lee
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Patent number: 9585214Abstract: An exemplary embodiment discloses a light-emitting diode (LED) driving circuit including an LED driving module configured to provide a first driving voltage to an LED light emitting module including a first LED group to an n-th LED group, n is an integer which is equal to or larger than 2, and sequentially drive the first LED group to the n-th LED group depending on a voltage level of the first driving voltage and a second driving voltage providing module configured to store some of the first driving voltage and selectively provide a second driving voltage to some of the LED groups other than at least the first LED group to an m-th LED group among the LED groups in a Vfm compensation section, 1?m?n?1, according to a control of the LED driving module.Type: GrantFiled: June 29, 2015Date of Patent: February 28, 2017Assignee: Seoul Semiconductor Co., Ltd.Inventors: Hye Man Jung, Hyun Gu Kang, Sang Wook Han
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Publication number: 20170041991Abstract: An LED luminescence apparatus is provided, which includes a rectifying unit rectifying an AC voltage and generating a rectified voltage; a plurality of LEDs connected in series to an output terminal of the rectifying unit; a plurality of switches having drain terminals connected to cathodes of the plurality of LEDs, respectively; and a switch control unit sensing current through a plurality of resistors connected to source terminals of the plurality of switches, respectively, comparing the sensed current with a set reference current, and outputting a voltage corresponding to a difference between the sensed current and the set reference current to a gate terminal of each of the plurality of switches.Type: ApplicationFiled: October 18, 2016Publication date: February 9, 2017Inventors: Hye Man JUNG, Hyun Gu KANG, Snag Wook HAN, Young Do JUNG
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Patent number: 9516718Abstract: An LED luminescence apparatus is provided, which includes a rectifying unit rectifying an AC voltage and generating a rectified voltage; a plurality of LEDs connected in series to an output terminal of the rectifying unit; a plurality of switches having drain terminals connected to cathodes of the plurality of LEDs, respectively; and a switch control unit sensing current through a plurality of resistors connected to source terminals of the plurality of switches, respectively, comparing the sensed current with a set reference current, and outputting a voltage corresponding to a difference between the sensed current and the set reference current to a gate terminal of each of the plurality of switches.Type: GrantFiled: December 28, 2012Date of Patent: December 6, 2016Assignee: Seoul Semiconductor Co., Ltd.Inventors: Hye Man Jung, Hyun Gu Kang, Snag Wook Han, Young Do Jung
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Publication number: 20160309558Abstract: A lighting apparatus includes a light-emitting diode (LED) array, a rectifying unit configured to rectify an alternating current (AC) voltage and to generate a driving voltage for the LED array, a switch control signal generation unit configured to generate a switching control signal depending on the driving voltage, the switching control signal including connection control signals and a compensation control signal, connection changing units configured to change a connection between the LEDs according to the connection control signals, and a light output compensation unit configured to generate a compensation voltage according to the compensation control signal, and selectively supply the compensation voltage to the LED array.Type: ApplicationFiled: June 24, 2016Publication date: October 20, 2016Inventors: Hye Man JUNG, Hyun Gu Kang, Oh Seok Kim, Young Eun Yang
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Publication number: 20160270168Abstract: A light-emitting diode (LED) driving apparatus includes a rectifying module configured to rectify an alternating current voltage and output a first driving voltage, an LED light emitting module including a first LED group, and a second LED group to an n-th LED group, and configured to receive the first driving voltage from the rectifying module, n being a positive integer of two or more, an LED driving module configured to sequentially drive the first LED group to the n-th LED group according to a voltage level of the first driving voltage, and a second driving voltage providing module connected in parallel to at least one LED group of the second LED group to the n-th LED group.Type: ApplicationFiled: May 20, 2016Publication date: September 15, 2016Inventors: Hye Man JUNG, Hyun Gu KANG, Sang Wook HAN
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Patent number: 9426857Abstract: An LED driving circuit package includes a rectification unit to receive an AC power voltage and rectify the AC power voltage to generate a ripple voltage, an LED driving switching unit including a plurality of switch units and a plurality of current control units. The LED driving circuit package further includes a low voltage control unit including a circuit power supply unit to generate low voltage power, a voltage detection unit to detect a magnitude of the ripple voltage, a reference frequency generation unit to generate a reference frequency, and a reference pulse generation unit to generate a reference pulse for controlling the operation of the LED driving switch unit according to the reference frequency and a magnitude of the voltage detected by the voltage detection unit.Type: GrantFiled: January 27, 2012Date of Patent: August 23, 2016Assignee: Seoul Semiconductor Co., Ltd.Inventors: Young Do Jong, Hyun Gu Kang, Hye Man Jung, Kang Nyung Lee
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Patent number: 9378701Abstract: A backlight driving apparatus that drives a backlight unit having a plurality of LEDs is provided, which includes a rectifying unit rectifying an AC voltage and generating a driving voltage for the plurality of LEDs, a plurality of connection changing units changing connection relations between the plurality of LEDs depending on a level of the driving voltage, and a light output compensation unit generating a compensation voltage using the driving voltage and selectively supplying the compensation voltage to the plurality of LEDs.Type: GrantFiled: December 28, 2012Date of Patent: June 28, 2016Assignee: Seoul Semiconductor Co., Ltd.Inventors: Hye Man Jung, Hyun Gu Kang, Oh Seok Kim, Young Eun Yang