Patents by Inventor Sang Cheol Bong
Sang Cheol Bong 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).
-
Patent number: 10499471Abstract: A lighting module includes a light emitter including a first light-emitting diode (LED) string configured to emit light of a first color temperature and a second LED string configured to emit light of a second color temperature, a terminal unit configured to provide terminals capable of supplying a driving current to at least one of the first LED string and the second LED string, and a balancing unit including a first balance LED, a second balance LED, a first balance resistor, and a second balance resistor, the balancing unit configured to adjust a mixed color temperature, and reduce a luminance difference between the light of the mixed color temperature and one of the light of the first color temperature and the light of the second color temperature.Type: GrantFiled: September 11, 2018Date of Patent: December 3, 2019Assignee: Samsung Electronics Co., Ltd.Inventors: Sang-cheol Bong, Min-soo Han
-
Publication number: 20190320513Abstract: A lighting module includes a light emitter including a first light-emitting diode (LED) string configured to emit light of a first color temperature and a second LED string configured to emit light of a second color temperature, a terminal unit configured to provide terminals capable of supplying a driving current to at least one of the first LED string and the second LED string, and a balancing unit including a first balance LED, a second balance LED, a first balance resistor, and a second balance resistor, the balancing unit configured to adjust a mixed color temperature, and reduce a luminance difference between the light of the mixed color temperature and one of the light of the first color temperature and the light of the second color temperature.Type: ApplicationFiled: September 11, 2018Publication date: October 17, 2019Inventors: Sang-cheol BONG, Min-soo HAN
-
Patent number: 10362654Abstract: A lighting apparatus includes first and second light emitting areas, a color temperature controller, and a balance circuit. The first light emitting area includes first light-emitting arrays connected in series and outputs light of a first color temperature. The second light emitting area includes second light-emitting arrays connected in series and connected to the first light emitting area in parallel. The second light-emitting arrays output light of a second color temperature different from the first color temperature. The color temperature controller is selectively connected to at least one of an input node of the first light emitting area and an input node of the second light emitting area. The color temperature controllers determines an on/off state of the first and second light emitting areas. The balance circuit is connected to at least one of the first and second light emitting areas in series.Type: GrantFiled: October 23, 2018Date of Patent: July 23, 2019Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sang Cheol Bong, Min Soo Han, Hyun Jung Kim, Kil Yoan Chung
-
Publication number: 20190082511Abstract: A lighting apparatus includes first and second light emitting areas, a color temperature controller, and a balance circuit. The first light emitting area includes first light-emitting arrays connected in series and outputs light of a first color temperature. The second light emitting area includes second light-emitting arrays connected in series and connected to the first light emitting area in parallel. The second light-emitting arrays output light of a second color temperature different from the first color temperature. The color temperature controller is selectively connected to at least one of an input node of the first light emitting area and an input node of the second light emitting area. The color temperature controllers determines an on/off state of the first and second light emitting areas. The balance circuit is connected to at least one of the first and second light emitting areas in series.Type: ApplicationFiled: October 23, 2018Publication date: March 14, 2019Inventors: Sang Cheol BONG, Min Soo HAN, Hyun Jung KIM, Kil Yoan CHUNG
-
Patent number: 10123386Abstract: A lighting apparatus includes first and second light emitting areas, a color temperature controller, and a balance circuit. The first light emitting area includes first light-emitting arrays connected in series and outputs light of a first color temperature. The second light emitting area includes second light-emitting arrays connected in series and connected to the first light emitting area in parallel. The second light-emitting arrays output light of a second color temperature different from the first color temperature. The color temperature controller is selectively connected to at least one of an input node of the first light emitting area and an input node of the second light emitting area. The color temperature controllers determines an on/off state of the first and second light emitting areas. The balance circuit is connected to at least one of the first and second light emitting areas in series.Type: GrantFiled: March 30, 2018Date of Patent: November 6, 2018Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sang Cheol Bong, Min Soo Han, Hyun Jung Kim, Kil Yoan Chung
-
Patent number: 9686833Abstract: An LED driving apparatus according to an exemplary embodiment of the present inventive concept may include a rectifier circuit rectifying alternating current (AC) power to generate driving power for operating a plurality of LED arrays; a controller integrated circuit (IC) including a plurality of internal switches connected to respective output terminals of the plurality of LED arrays and controlling a path of a current flowing in the plurality of LED arrays by adjusting operations of the plurality of internal switches according to a magnitude of the driving power; and a current controlling circuit connected to the output terminal of at least one of the plurality of LED arrays and controlling a current flowing in the at least one LED array.Type: GrantFiled: March 18, 2016Date of Patent: June 20, 2017Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sang Cheol Bong, Kyoung Tae Han
-
Patent number: 9549442Abstract: A light emitting diode (LED) driving apparatus includes a power supply circuit configured to supply driving power to a plurality of LED arrays, a controller integrated circuit (IC) including a plurality of internal switches respectively connected to the plurality of LED arrays and configured to control a path of current flowing in the plurality of LED arrays by adjusting operations of the plurality of internal switches based on a magnitude of the driving power, and a current control circuit connected to an output terminal of a first LED array among the plurality of LED arrays and configured to adjust current flowing in the first LED array. The first LED array is constantly operated while the driving power is being supplied.Type: GrantFiled: March 31, 2016Date of Patent: January 17, 2017Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventor: Sang Cheol Bong
-
Publication number: 20160381750Abstract: An LED driving apparatus according to an exemplary embodiment of the present inventive concept may include a rectifier circuit rectifying alternating current (AC) power to generate driving power for operating a plurality of LED arrays; a controller integrated circuit (IC) including a plurality of internal switches connected to respective output terminals of the plurality of LED arrays and controlling a path of a current flowing in the plurality of LED arrays by adjusting operations of the plurality of internal switches according to a magnitude of the driving power; and a current controlling circuit connected to the output terminal of at least one of the plurality of LED arrays and controlling a current flowing in the at least one LED array.Type: ApplicationFiled: March 18, 2016Publication date: December 29, 2016Inventors: Sang Cheol BONG, Kyoung Tae HAN
-
Publication number: 20160381751Abstract: A light emitting diode (LED) driving apparatus includes a power supply circuit configured to supply driving power to a plurality of LED arrays, a controller integrated circuit (IC) including a plurality of internal switches respectively connected to the plurality of LED arrays and configured to control a path of current flowing in the plurality of LED arrays by adjusting operations of the plurality of internal switches based on a magnitude of the driving power, and a current control circuit connected to an output terminal of a first LED array among the plurality of LED arrays and configured to adjust current flowing in the first LED array. The first LED array is constantly operated while the driving power is being supplied.Type: ApplicationFiled: March 31, 2016Publication date: December 29, 2016Inventor: Sang Cheol BONG
-
Patent number: 9370063Abstract: A light emitting diode (LED) driving device is provided. The LED driving device includes a rectifier configured to rectify alternating current (AC) power to generate rectified power; an AC driver configured to control operations of a plurality of LED groups so that the plurality of LED groups receive the rectified power generated by the rectifier; and a light amount controller configured to reduce an amount of current applied to the plurality of LED groups when a peak value of the rectified power is increased, and increase the amount of current applied to the plurality of LED groups when the peak value of the rectified power is reduced.Type: GrantFiled: April 17, 2015Date of Patent: June 14, 2016Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sang Cheol Bong, Kyu Cheol Kang, Yu Kyung Kim, Kyoung Tae Han
-
Publication number: 20150373799Abstract: A light emitting diode (LED) driving device is provided. The LED driving device includes a rectifier configured to rectify alternating current (AC) power to generate rectified power; an AC driver configured to control operations of a plurality of LED groups so that the plurality of LED groups receive the rectified power generated by the rectifier; and a light amount controller configured to reduce an amount of current applied to the plurality of LED groups when a peak value of the rectified power is increased, and increase the amount of current applied to the plurality of LED groups when the peak value of the rectified power is reduced.Type: ApplicationFiled: April 17, 2015Publication date: December 24, 2015Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sang Cheol BONG, Kyu Cheol KANG, Yu Kyung KIM, Kyoung Tae HAN
-
Patent number: 8299881Abstract: There is provided a transformer improved in leakage inductance including: a core having first, second and third legs electromagnetically coupled to one another; a primary winding formed of a conductor having one end and another end receiving power from the outside and dividedly wound around the first, second and third legs; and a secondary winding wound around at least one of the first, second and third legs and receiving induced power by electromagnetic induction with the primary winding.Type: GrantFiled: October 19, 2010Date of Patent: October 30, 2012Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Gun Woo Moon, Tae Won Heo, Chong Eun Kim, Ki Bum Park, Don Sik Kim, Jong Pil Kim, Sang Cheol Bong, Dong Wook Lee, Dong Joong Kim
-
Patent number: 8120204Abstract: A load sharing device for load balancing among a plurality of power supply modules connected in parallel to a single load includes a common voltage control signal output unit and output voltage control units corresponding to the power supply modules, respectively. The common voltage control signal output unit generates a common voltage control signal from output voltages of the power supply modules and outputs the common voltage control signal to the power supply modules. The output voltage control units detect output currents of the power supply modules and control the output voltages of the power supply modules to be in a predetermined voltage range according to the common voltage control signal and the detected output currents.Type: GrantFiled: August 21, 2009Date of Patent: February 21, 2012Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Gun Woo Moon, Sang Cheol Bong, Kang Hyun Yi, Ki Bum Park, Dong Seong Oh, Chong Eun Kim, Jong Pil Kim, Dong Joong Kim, Tae Won Heo, Don Sik Kim
-
Patent number: 8098500Abstract: A phase shift full bridge converter with a reduced current stress includes: a switching unit that switches an input voltage; a transformer that includes a first capacitor serially connected to, and having a primary side and a secondary side; an auxiliary circuit unit that includes a first switch, a second switch, and a second capacitor, which are connected in parallel to the secondary side of the transformer; and a rectification unit that is connected to the auxiliary circuit unit, with an output inductor being removed.Type: GrantFiled: September 19, 2008Date of Patent: January 17, 2012Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Tae Won Heo, Gun Woo Moon, Woo Jin Lee, Ki Bum Park, Don Sik Kim, Chong Eun Kim, Jong Pil Kim, Sang Cheol Bong, Hak Ryong Kim, Dong Joong Kim
-
Patent number: 8094473Abstract: There is provided a bridgeless power factor correction circuit that corrects a power factor by complementarily switching two switches according to phase of input power without using rectifier bridge diodes. A bridgeless power factor correction circuit according to an aspect of the invention may include: a switching unit having a plurality of switches and alternately switching input AC power; a stabilizing unit rectifying and smoothing the power switched by the switching unit; and a control unit controlling an alternate switching operation between the plurality of switches according to phases of the input power.Type: GrantFiled: August 8, 2008Date of Patent: January 10, 2012Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Gun Woo Moon, Dong Wook Lee, Kyu Min Cho, Seong Wook Choi, Don Sik Kim, Jong Pil Kim, Sang Cheol Bong, Dong Joong Kim, Tae Won Heo
-
Patent number: 7969752Abstract: In accordance with the present invention, the switching power supply device using a current sharing transformer includes an inverter switching unit for switching an input voltage; a set of share inductors connected to the inverter switching unit for distributing a current applied by the inverter switching unit; first and second transformers of which each primary side connected to the set of share inductors is connected in parallel to each other; and a rectifying unit connected to secondary sides of the first and second transformers.Type: GrantFiled: May 1, 2008Date of Patent: June 28, 2011Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Sang Cheol Bong, Tae Young Ahn, Don Sik Kim, Hak Ryong Kim, Myung Hyun Sung, Do Heung Na, Jong Pil Kim, Dong Joong Kim, Tae Won Heo, Dong Wook Lee
-
Publication number: 20110032062Abstract: There is provided a transformer improved in leakage inductance including: a core having first, second and third legs electromagnetically coupled to one another; a primary winding formed of a conductor having one end and another end receiving power from the outside and dividedly wound around the first, second and third legs; and a secondary winding wound around at least one of the first, second and third legs and receiving induced power by electromagnetic induction with the primary winding.Type: ApplicationFiled: October 19, 2010Publication date: February 10, 2011Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Gun Woo MOON, Tae Won HEO, Chong Eun KIM, Ki Bum PARK, Don Sik KIM, Jong Pil KIM, Sang Cheol BONG, Dong Wook LEE, Dong Joong KIM
-
Publication number: 20110001359Abstract: The present invention relates to a load sharing device and a parallel power supply therewith. There is provided a parallel power supply, including: a plurality of power supply modules each connected to a single load in parallel to provide balanced output currents to the single load; a common voltage control signal output unit that generates a common voltage control signal from output voltages of the plurality of power supply modules and outputs the common voltage control signals to the plurality of power supply modules; and output voltage control units that are provided in the respective plurality of power supply modules to detect output currents of the plurality of power supply modules and to control output voltages of the plurality of power supply modules according to the detected signals, controlling the output voltages to be in a predetermined voltage range according to the common voltage control signals.Type: ApplicationFiled: August 21, 2009Publication date: January 6, 2011Applicant: Samsung Electro-Mechanics Co., Ltd.Inventors: Gun Woo Moon, Sang Cheol Bong, Kang Hyun Yi, Ki Bum Park, Dong Seong Oh, Chong Eun Kim, Jong Pil Kim, Dong Joong Kim, Tae Won Heo, Don Sik Kim
-
Publication number: 20100246225Abstract: The present invention provides a power supply for a server including: a PFC (Power Factor Correction) unit for meeting harmonic regulation by being connected to an input power source; a DC/DC unit including a switching stage provided with at least one switching device to switch a voltage of a link capacitor as an output voltage of the PFC unit to a predetermined operation frequency and a DC/DC stage driven by the switching stage; a DC/DC control unit for controlling the DC/DC unit by being connected to the switching device; and a frequency varying circuit unit for supplying the DC/DC control unit with a frequency control signal to adjust the operation frequency of the switching device according to load after detecting an output current of the link capacitor and acquiring load information.Type: ApplicationFiled: December 29, 2009Publication date: September 30, 2010Applicant: Samsung Electro-Mechanics Co., Ltd.Inventors: Gun Woo MOON, Don Sik KIM, Kyu Min CHO, Young Do KIM, Dae Min JANG, Chong Eun KIM, Jong Pil KIM, Dong Joong KIM, Tae Won HEO, Sang Cheol BONG
-
Patent number: 7742319Abstract: Provided is a transformer having resonant inductance, the transformer including a core that includes a first leg formed in one side thereof, a second leg which is formed in the other side thereof so as to be electromagnetically coupled to the first leg, and a third leg which is formed between the first and second legs so as to be electromagnetically coupled to the first and second legs; a primary winding that is wound around one side of the third leg; a secondary winding that is wound around the other side of the third leg so as to induce power through electromagnetic induction with the primary winding; and a resonant inductance winding that is wound around the outside of the core so as not to be magnetically induced by magnetic fluxes generated from the primary and secondary windings.Type: GrantFiled: September 17, 2008Date of Patent: June 22, 2010Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Don Sik Kim, Gun Woo Moon, Kyu Min Cho, Young Do Kim, In Ho Cho, Hak Ryong Kim, Jong Pil Kim, Dong Joong Kim, Tae Won Heo, Sang Cheol Bong