Patents by Inventor Chul-woo Oh
Chul-woo Oh 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: 12201798Abstract: Disclosed are a method for increasing the viability of cells by ultrasound irradiation and an ultrasound irradiation apparatus using same. The method comprises: applying a drug and an epidermal drug delivery system onto the epidermis of a subject; and, with ultrasound parameters each being preset within a certain range, an ultrasound irradiation apparatus irradiating ultrasound onto the epidermis of the subject through an ultrasound generation unit placed within a critical range from the epidermis of the subject, wherein the epidermal drug delivery system induces the formation of cavities, i.e., cavitation around the epidermis of the subject when the ultrasound is irradiated, the ultrasound parameters at least include an ultrasound pressure and an ultrasound duty percentage, the ultrasound pressure is 0.5-1 MPa, and the ultrasound duty percentage is 1-5%.Type: GrantFiled: October 31, 2019Date of Patent: January 21, 2025Assignee: BioInfra Life Science Inc.Inventors: Chul Woo Kim, Dong Hee Park, Jong Ho Won, Hea Ry Oh
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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: 8884466Abstract: A high voltage power supply (HVPS) including first and second high voltage output controllers controlling output of a high voltage output signal; and a plurality of transformers transforming an output signal provided from the first and second high voltage output controller, disposed outside of the first and second high voltage controllers on the substrate, wherein output terminals in the secondary sides of the plurality of transformers are disposed along the edge of the substrate. Therefore, the volume of a system can be minimized by arranging circuits in each component for high voltage output in parallel, and spark and discharge can be reduced by minimizing interference between the primary sides and the secondary sides of the components for high voltage output, thereby preventing damage to a product.Type: GrantFiled: September 14, 2012Date of Patent: November 11, 2014Assignee: Samsung Electronics Co., Ltd.Inventor: Chul-woo Oh
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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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Publication number: 20130009487Abstract: A high voltage power supply (HVPS) including first and second high voltage output controllers controlling output of a high voltage output signal; and a plurality of transformers transforming an output signal provided from the first and second high voltage output controller, disposed outside of the first and second high voltage controllers on the substrate, wherein output terminals in the secondary sides of the plurality of transformers are disposed along the edge of the substrate. Therefore, the volume of a system can be minimized by arranging circuits in each component for high voltage output in parallel, and spark and discharge can be reduced by minimizing interference between the primary sides and the secondary sides of the components for high voltage output, thereby preventing damage to a product.Type: ApplicationFiled: September 14, 2012Publication date: January 10, 2013Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: 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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Publication number: 20120294044Abstract: Provided is a high-voltage power supply including a board having at least one bent portion separating a first region of the board from a second region of the board, the first region not being coplanar with the second region of the board; a first circuit, on the first region of the board, generating a second voltage according to a first voltage; and a second circuit, on the second region of the board, amplifying the second voltage and then rectifying the amplified second voltage.Type: ApplicationFiled: August 8, 2012Publication date: November 22, 2012Applicant: Samsung Electronics Co. Ltd.Inventors: Chul-woo OH, Joong-gi Kwon
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Patent number: 8283806Abstract: A high voltage power supply (HVPS) including first and second high voltage output controllers controlling output of a high voltage output signal; and a plurality of transformers transforming an output signal provided from the first and second high voltage output controller, disposed outside of the first and second high voltage controllers on the substrate, wherein output terminals in the secondary sides of the plurality of transformers are disposed along the edge of the substrate. Therefore, the volume of a system can be minimized by arranging circuits in each component for high voltage output in parallel, and spark and discharge can be reduced by minimizing interference between the primary sides and the secondary sides of the components for high voltage output, thereby preventing damage to a product.Type: GrantFiled: March 18, 2011Date of Patent: October 9, 2012Assignee: Samsung Electronics Co., Ltd.Inventor: Chul-woo Oh
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Patent number: 8283807Abstract: A high voltage power supply (HVPS) including first and second high voltage output controllers controlling output of a high voltage output signal; and a plurality of transformers transforming an output signal provided from the first and second high voltage output controller, disposed outside of the first and second high voltage controllers on the substrate, wherein output terminals in the secondary sides of the plurality of transformers are disposed along the edge of the substrate. Therefore, the volume of a system can be minimized by arranging circuits in each component for high voltage output in parallel, and spark and discharge can be reduced by minimizing interference between the primary sides and the secondary sides of the components for high voltage output, thereby preventing damage to a product.Type: GrantFiled: January 13, 2012Date of Patent: October 9, 2012Inventor: Chul-woo Oh
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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: 8260167Abstract: Provided is a high-voltage power supply including a board having at least one bent portion separating a first region of the board from a second region of the board, the first region not being coplanar with the second region of the board; a first circuit, on the first region of the board, generating a second voltage according to a first voltage; and a second circuit, on the second region of the board, amplifying the second voltage and then rectifying the amplified second voltage.Type: GrantFiled: March 18, 2009Date of Patent: September 4, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Chul-woo Oh, Joong-gi Kwon
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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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Publication number: 20120104865Abstract: A high voltage power supply (HVPS) including first and second high voltage output controllers controlling output of a high voltage output signal; and a plurality of transformers transforming an output signal provided from the first and second high voltage output controller, disposed outside of the first and second high voltage controllers on the substrate, wherein output terminals in the secondary sides of the plurality of transformers are disposed along the edge of the substrate. Therefore, the volume of a system can be minimized by arranging circuits in each component for high voltage output in parallel, and spark and discharge can be reduced by minimizing interference between the primary sides and the secondary sides of the components for high voltage output, thereby preventing damage to a product.Type: ApplicationFiled: January 13, 2012Publication date: May 3, 2012Applicant: Samsung Electronics Co., Ltd.Inventor: 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