Patents by Inventor Jong-hwa Cho
Jong-hwa Cho 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: 11957669Abstract: One aspect of the present disclosure is a pharmaceutical composition which includes (R)—N-[1-(3,5-difluoro-4-methansulfonylamino-phenyl)-ethyl]-3-(2-propyl-6-trifluoromethyl-pyridin-3-yl)-acrylamide as a first component and a cellulosic polymer as a second component, wherein the composition of one aspect of the present disclosure has a formulation characteristic in which crystal formation is delayed for a long time.Type: GrantFiled: August 10, 2018Date of Patent: April 16, 2024Assignee: AMOREPACIFIC CORPORATIONInventors: Joon Ho Choi, Won Kyung Cho, Kwang-Hyun Shin, Byoung Young Woo, Ki-Wha Lee, Min-Soo Kim, Jong Hwa Roh, Mi Young Park, Young-Ho Park, Eun Sil Park, Jae Hong Park
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Patent number: 9164529Abstract: A high-voltage power supply to output a plus/minus high-voltage, which is applied to image forming apparatuses, includes a plus high-voltage output unit outputting the plus high-voltage by using a Pulse Width Modulation (PWM) signal, a minus high-voltage operation control unit charging a certain voltage while the plus high-voltage output unit is outputting the plus high-voltage, a minus high-voltage output unit outputting the minus high-voltage by using the certain voltage charged in the minus high-voltage operation control unit, and a minus high-voltage blocking unit to block the output of the minus high-voltage from the minus high-voltage output unit while the plus high-voltage output unit is outputting the plus high-voltage.Type: GrantFiled: December 16, 2013Date of Patent: October 20, 2015Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Chul-woo Oh, Jong-hwa Cho
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Patent number: 9008531Abstract: A constant current-type high-voltage power supply apparatus which is used in an image forming apparatus includes a leakage current detection unit that detects a leakage current leaked from at least one output terminal of the constant current-type high-voltage power supply apparatus and outputs the detected leakage current, a direct current voltage output unit that outputs different direct current (DC) voltages according to whether the leakage current detected by the leakage current detection unit is input, and a power control unit that controls power supply to the constant current-type high-voltage power supply apparatus according to the output DC voltage.Type: GrantFiled: December 10, 2012Date of Patent: April 14, 2015Assignee: Samsung Electronics Co., Ltd.Inventors: Chul-woo Oh, Jong-hwa Cho
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Patent number: 8755198Abstract: A control and driving device of a high voltage power supply (HVPS) of an electronic apparatus, such as an image forming apparatus, including an input to receive a signal supplied to the HVPS, a control and driving circuit to control and drive the signal received at the input, and an output to output the controlled and driven signal to a transformer of the HVPS, wherein the input, control and driving circuit, and output are integrated into one physical module.Type: GrantFiled: June 30, 2009Date of Patent: June 17, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-jo Jo, Jong-hwa Cho
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Publication number: 20140161478Abstract: A constant current-type high-voltage power supply apparatus which is used in an image forming apparatus includes a leakage current detection unit that detects a leakage current leaked from at least one output terminal of the constant current-type high-voltage power supply apparatus and outputs the detected leakage current, a direct current voltage output unit that outputs different direct current (DC) voltages according to whether the leakage current detected by the leakage current detection unit is input, and a power control unit that controls power supply to the constant current-type high-voltage power supply apparatus according to the output DC voltage.Type: ApplicationFiled: December 10, 2012Publication date: June 12, 2014Applicant: Samsung Electronics Co., LtdInventors: Chul-woo OH, Jong-hwa CHO
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Publication number: 20140105632Abstract: A high-voltage power supply to output a plus/minus high-voltage, which is applied to image forming apparatuses, includes a plus high-voltage output unit outputting the plus high-voltage by using a Pulse Width Modulation (PWM) signal, a minus high-voltage operation control unit charging a certain voltage while the plus high-voltage output unit is outputting the plus high-voltage, a minus high-voltage output unit outputting the minus high-voltage by using the certain voltage charged in the minus high-voltage operation control unit, and a minus high-voltage blocking unit to block the output of the minus high-voltage from the minus high-voltage output unit while the plus high-voltage output unit is outputting the plus high-voltage.Type: ApplicationFiled: December 16, 2013Publication date: April 17, 2014Applicant: SAMSUNG Electronics Co., Ltd.Inventors: Chul-woo OH, Jong-hwa CHO
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Patent number: 8634738Abstract: A high-voltage power supply to output a plus/minus high-voltage, which is applied to image forming apparatuses, includes a plus high-voltage output unit outputting the plus high-voltage by using a Pulse Width Modulation (PWM) signal, a minus high-voltage operation control unit charging a certain voltage while the plus high-voltage output unit is outputting the plus high-voltage, a minus high-voltage output unit outputting the minus high-voltage by using the certain voltage charged in the minus high-voltage operation control unit, and a minus high-voltage blocking unit to block the output of the minus high-voltage from the minus high-voltage output unit while the plus high-voltage output unit is outputting the plus high-voltage.Type: GrantFiled: January 28, 2010Date of Patent: January 21, 2014Assignee: SAMSUNG Electronics Co., Ltd.Inventors: Chul-woo Oh, Jong-hwa Cho
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Patent number: 8487475Abstract: A power supply apparatus, an apparatus, and a method of supplying power are provided. The power supply apparatus including a high voltage generating unit, which generates one or more output voltages by using an input voltage, and which is implemented as a chip. The one or more output terminals are on a same circuit board as the high voltage generating unit, to output the generated one or more output voltages. The chip includes a transforming unit to transform the input voltage into one or more transformed voltages that are different from one another, and a rectifying unit to rectify the transformed voltages into rectified voltages, and to determine the rectified voltages as the generated one or more output voltages.Type: GrantFiled: July 9, 2012Date of Patent: July 16, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Jong-hwa Cho, Joong-gi Kwon, Jong-yang Choo, Chul-woo Oh
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Publication number: 20130016990Abstract: A power supply apparatus, an apparatus, and a method of supplying power are provided. The power supply apparatus including a high voltage generating unit, which generates one or more output voltages by using an input voltage, and which is implemented as a chip. The one or more output terminals are on a same circuit board as the high voltage generating unit, to output the generated one or more output voltages. The chip includes a transforming unit to transform the input voltage into one or more transformed voltages that are different from one another, and a rectifying unit to rectify the transformed voltages into rectified voltages, and to determine the rectified voltages as the generated one or more output voltages.Type: ApplicationFiled: July 9, 2012Publication date: January 17, 2013Applicant: Samsung Electronics Co., Ltd.Inventors: Jong-Hwa Cho, Joong-gi Kwon, Jong-yang Choo, Chul-woo Oh
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Patent number: 8350407Abstract: A high voltage power supply apparatus comprising a first circuit disposed on a prepared substrate, and for receiving a first voltage and generating a second voltage that is previously set according to the first voltage, and a second circuit for amplifying and rectifying the second voltage to generate a plurality of high voltage signals, wherein the first circuit and the second circuit are embodied as a single module, wherein at least a portion of the single module is surrounded by an insulator.Type: GrantFiled: January 15, 2010Date of Patent: January 8, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Jong-hwa Cho, Joong-gi Kwon, Jong-yang Choo, Chul-woo Oh
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Patent number: 8340539Abstract: A constant current-type high-voltage power supply apparatus which is used in an image forming apparatus includes a leakage current detection unit that detects a leakage current leaked from at least one output terminal of the constant current-type high-voltage power supply apparatus and outputs the detected leakage current, a direct current voltage output unit that outputs different direct current (DC) voltages according to whether the leakage current detected by the leakage current detection unit is input, and a power control unit that controls power supply to the constant current-type high-voltage power supply apparatus according to the output DC voltage.Type: GrantFiled: January 27, 2010Date of Patent: December 25, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Chul-woo Oh, Jong-hwa Cho
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Patent number: 8274176Abstract: In a provided power supply unit, a plurality of circuit elements are integrated into a chip, wherein the circuit elements generate one or more output voltages by using an input voltage. Thus, although the number of voltages, which can be generated by the power supply apparatus, is remarkably large, the power supply apparatus can be miniaturized. In addition, an apparatus, in which the power supply apparatus is installed, can be miniaturized.Type: GrantFiled: December 21, 2007Date of Patent: September 25, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Jong-hwa Cho, Joong-gi Kwon, Jong-yang Choo, Chul-woo Oh
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Patent number: 8213824Abstract: A high voltage power controlling apparatus of an image forming apparatus including a DC (direct current) power controller to convert and output a first PWM (pulse width modulation) signal provided from an engine controller into a switching waveform signal, a first voltage transformer to transform the switching waveform signal output from the DC power controller, a rectifier to rectify output power transformed by the first voltage transformer into DC power, first through N(where N is a positive integer greater than one) DC supplies to adjust and output the DC power rectified by the rectifier such that the DC power is adjusted to a predetermined level, first through N AC (alternating current) power controllers to convert and output a second PWM signal provided from the engine controller into switching waveform signals, and second through N+1 voltage transformer to transform the switching waveform signals output from the first through N AC power controllers, to overlap the transformed powers with the DC powers hType: GrantFiled: February 10, 2011Date of Patent: July 3, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Jong-hwa Cho, Chul-woo Oh
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Patent number: 7986534Abstract: An apparatus to generate a high voltage includes a switching part to control a voltage induced in a secondary coil of a power transforming part, by interrupting a current in a primary coil of the power transforming part, a digital controlling part to control the interruption operation of the switching part according to supplied control data. The switching part, the digital interfacing part and the digital controlling part may be embodied in an ASIC chip (application-specific integrated circuit). An optimum control according to an output state of the apparatus is easily achieved, manufacturing time for tuning each parameter is reduced and heat generation in the apparatus is reduced.Type: GrantFiled: January 14, 2009Date of Patent: July 26, 2011Assignee: SAMSUNG Electronics Co., Ltd.Inventors: Young-min Chae, Joong-gi Kwon, Chul-woo Oh, Jong-hwa Cho, Sang-yong Han
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Patent number: 7961444Abstract: A high voltage power supply includes a current overflow prevention unit to detect a change in a load of a device that is operated by an output power supplied from a transformer and to ground filtered signals that are input to first and second comparison units according to the detection result.Type: GrantFiled: January 15, 2008Date of Patent: June 14, 2011Assignee: Samsung Electronics Co., Ltd.Inventor: Jong-hwa Cho
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Publication number: 20110129246Abstract: A high voltage power controlling apparatus of an image forming apparatus including a DC (direct current) power controller to convert and output a first PWM (pulse width modulation) signal provided from an engine controller into a switching waveform signal, a first voltage transformer to transform the switching waveform signal output from the DC power controller, a rectifier to rectify output power transformed by the first voltage transformer into DC power, first through N(where N is a positive integer greater than one) DC supplies to adjust and output the DC power rectified by the rectifier such that the DC power is adjusted to a predetermined level, first through N AC (alternating current) power controllers to convert and output a second PWM signal provided from the engine controller into switching waveform signals, and second through N+1 voltage transformer to transform the switching waveform signals output from the first through N AC power controllers, to overlap the transformed powers with the DC powers hType: ApplicationFiled: February 10, 2011Publication date: June 2, 2011Applicant: Samsung Electronics Co., LtdInventors: Jong-hwa CHO, Chul-woo Oh
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Patent number: 7907864Abstract: A high voltage power controlling apparatus of an image forming apparatus includes a DC (direct current) power controller connected to a plurality of DC supplies to output DC power at respective predetermined levels. A plurality of AC (alternating current) power controllers control output AC power to overlap the power output from the DC supplies, respectively.Type: GrantFiled: January 4, 2008Date of Patent: March 15, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Jong-hwa Cho, Chul-woo Oh
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Publication number: 20110058841Abstract: A high-voltage power supply to output a plus/minus high-voltage, which is applied to image forming apparatuses, includes a plus high-voltage output unit outputting the plus high-voltage by using a Pulse Width Modulation (PWM) signal, a minus high-voltage operation control unit charging a certain voltage while the plus high-voltage output unit is outputting the plus high-voltage, a minus high-voltage output unit outputting the minus high-voltage by using the certain voltage charged in the minus high-voltage operation control unit, and a minus high-voltage blocking unit to block the output of the minus high-voltage from the minus high-voltage output unit while the plus high-voltage output unit is outputting the plus high-voltage.Type: ApplicationFiled: January 28, 2010Publication date: March 10, 2011Applicant: Samsung Electronics Co., Ltd.Inventors: Chul-woo OH, Jong-hwa Cho
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Publication number: 20110038645Abstract: A constant current-type high-voltage power supply apparatus which is used in an image forming apparatus includes a leakage current detection unit that detects a leakage current leaked from at least one output terminal of the constant current-type high-voltage power supply apparatus and outputs the detected leakage current, a direct current voltage output unit that outputs different direct current (DC) voltages according to whether the leakage current detected by the leakage current detection unit is input, and a power control unit that controls power supply to the constant current-type high-voltage power supply apparatus according to the output DC voltage.Type: ApplicationFiled: January 27, 2010Publication date: February 17, 2011Applicant: Samsung Electronics Co., LtdInventors: Chul-woo OH, Jong-hwa Cho
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Patent number: 7852648Abstract: A power supply control apparatus and method are provided. The apparatus includes a controller outputting a first pulse width modulation (PWM) signal for supplying an electric power and a second PWM signal to be compared to the first PWM signal, a first PWM signal input unit converting the second PWM signal to a direct current (DC) signal, a second PWM signal input unit receiving the converted second PWM signal, a comparator comparing the first PWM signal and the converted second PWM signal, a switching unit generating a waveform having a voltage according to the comparison result of the comparator, a transformer transforming the voltage of the generated pulse waveform according to the switching result of the switching unit and a rectifier and voltage divider for rectifying and voltage-dividing the transforming result of the transformer, wherein the controller adjusts the second PWM signal by receiving the rectifying and voltage-dividing result of the rectifier & voltage divider.Type: GrantFiled: November 6, 2006Date of Patent: December 14, 2010Assignee: Samsung Electronics Co., Ltd.Inventor: Jong-hwa Cho