Patents by Inventor Seung-Young Choi
Seung-Young Choi 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: 20200090598Abstract: A display device includes a backlight unit including a plurality of light emitting blocks, a first controller configured to generate first block representative value information for first pixel blocks based on first image data, and a second controller configured to generate second block representative value information for second pixel blocks based on second image data. The first controller receives the second block representative value information from the second controller, and the second controller receives the first block representative value information from the first controller. The first and second controllers generate duty information for the plurality of light emitting blocks based on the first and second block representative value information, and generate light profile information of the backlight unit. The first controller compensates the first image data based on the light profile information, and the second controller compensates the second image data based on the light profile information.Type: ApplicationFiled: June 12, 2019Publication date: March 19, 2020Inventors: Youngsoo SOHN, Yoongu KIM, Seung Young CHOI, Akihiro TAKEGAMA
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Patent number: 9947285Abstract: A voltage converter includes a conversion unit, a self driver and an output unit. The conversion unit includes at least one inductor and provides a boosting power based on an input voltage and a first driving signal. The self driver includes at least one inductor that forms a magnetic coupling with the at least one inductor of the conversion unit. The self driver generates a second driving signal that is synchronized with the first driving signal through the magnetic coupling. The output unit generates an output voltage based on the boosting power and the second driving signal. Switching loss and conduction loss may be reduced by replacing an output diode with an output transistor and voltage spike and electromagnetic interference may be reduced through zero voltage switching. The driving signal of the output transistor may be controlled efficiently by adjusting the inductance of the driving inductor.Type: GrantFiled: February 9, 2015Date of Patent: April 17, 2018Assignee: Samsung Display Co., Ltd.Inventors: Gwang-Teak Lee, Seung-Young Choi, Jae-Kyu Park
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Publication number: 20170092204Abstract: A method of driving a light-source module includes adjusting a frequency of a boosting switching signal based on a dimming signal which controls luminance of a light-emitting diode (“LED”) string of the light-source module, where the LED string comprises a plurality of LEDs connected to each other in series, and controlling a main transistor in response to the boosting switching signal to transfer a driving voltage to the LED string.Type: ApplicationFiled: December 9, 2016Publication date: March 30, 2017Inventors: Seung-Wan KIM, Min-Soo CHOI, Gwang-Teak LEE, Tae-Gon IM, Myoung-Soo KIM, Hwan-Woong LEE, Seung-Young CHOI
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Patent number: 9548021Abstract: A method of driving a light-source module includes adjusting a frequency of a boosting switching signal based on a dimming signal which controls luminance of a light-emitting diode (“LED”) string of the light-source module, where the LED string comprises a plurality of LEDs connected to each other in series, and controlling a main transistor in response to the boosting switching signal to transfer a driving voltage to the LED string.Type: GrantFiled: January 16, 2013Date of Patent: January 17, 2017Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Seung-Wan Kim, Min-Soo Choi, Gwang-Teak Lee, Tae-Gon Im, Myoung-Soo Kim, Hwan-Woong Lee, Seung-Young Choi
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Patent number: 9529561Abstract: A display device is provided. The display device includes a display panel, a backlight unit, and a luminance comparison unit. The backlight unit is configured to supply light to the display panel. The luminance comparison unit is configured to compare a measured luminance of the display panel with a reference luminance range. The backlight unit includes a light source unit, a DC-DC converter, and a driving current controller. The DC-DC converter is configured to supply a driving voltage to the light source unit, and the driving current controller is configured to control a driving current flowing to the light source unit based on the comparison result of the luminance comparison unit.Type: GrantFiled: August 6, 2014Date of Patent: December 27, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Seok Hwan Lee, Dae-Sik Lee, Hwan Woong Lee, Seung Young Choi
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Patent number: 9514689Abstract: A display device includes at least one light source array configured to provide a display panel with light, a dimming signal generating unit configured to receive an image data signal and generate a dimming signal, a first comparator configured to receive the dimming signal output from the dimming signal generating unit and a preset critical value and generate a comparison signal, a dimming modulating unit configured to receive the comparison signal output from the first comparator and the dimming signal output from the dimming signal generating unit and modulate the dimming signal, a constant current controller configured to receive the dimming signal output from the dimming modulating unit and a voltage from a sensor node, and to control a light driving current driving the light source array, and a resistor controller configured to change resistors connected to the sensor node by the comparison signal output from the first comparator.Type: GrantFiled: March 10, 2015Date of Patent: December 6, 2016Assignee: Samsung Display Co., Ltd.Inventors: Seok Hwan Lee, Seung Young Choi, Byung Kyou Min, Dae Sik Lee
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Publication number: 20160078821Abstract: A display device includes at least one light source array configured to provide a display panel with light, a dimming signal generating unit configured to receive an image data signal and generate a dimming signal, a first comparator configured to receive the dimming signal output from the dimming signal generating unit and a preset critical value and generate a comparison signal, a dimming modulating unit configured to receive the comparison signal output from the first comparator and the dimming signal output from the dimming signal generating unit and modulate the dimming signal, a constant current controller configured to receive the dimming signal output from the dimming modulating unit and a voltage from a sensor node, and to control a light driving current driving the light source array, and a resistor controller configured to change resistors connected to the sensor node by the comparison signal output from the first comparator.Type: ApplicationFiled: March 10, 2015Publication date: March 17, 2016Inventors: Seok Hwan LEE, Seung Young CHOI, Byung Kyou MIN, Dae Sik LEE
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Publication number: 20160063942Abstract: A voltage converter includes a conversion unit, a self driver and an output unit. The conversion unit includes at least one inductor and provides a boosting power based on an input voltage and a first driving signal. The self driver includes at least one inductor that forms a magnetic coupling with the at least one inductor of the conversion unit. The self driver generates a second driving signal that is synchronized with the first driving signal through the magnetic coupling. The output unit generates an output voltage based on the boosting power and the second driving signal. Switching loss and conduction loss may be reduced by replacing an output diode with an output transistor and voltage spike and electromagnetic interference may be reduced through zero voltage switching. The driving signal of the output transistor may be controlled efficiently by adjusting the inductance of the driving inductor.Type: ApplicationFiled: February 9, 2015Publication date: March 3, 2016Inventors: Gwang-Teak LEE, Seung-Young CHOI, Jae-Kyu PARK
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Publication number: 20150187286Abstract: A display device is provided. The display device includes a display panel, a backlight unit, and a luminance comparison unit. The backlight unit is configured to supply light to the display panel. The luminance comparison unit is configured to compare a measured luminance of the display panel with a reference luminance range. The backlight unit includes a light source unit, a DC-DC converter, and a driving current controller. The DC-DC converter is configured to supply a driving voltage to the light source unit, and the driving current controller is configured to control a driving current flowing to the light source unit based on the comparison result of the luminance comparison unit.Type: ApplicationFiled: August 6, 2014Publication date: July 2, 2015Inventors: SEOK HWAN LEE, DAE-SIK LEE, HWAN WOONG LEE, SEUNG YOUNG CHOI
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Patent number: 8823276Abstract: A light unit includes: an integrated power (“IP”) board which receives power supply and converts the power supply into a high voltage and a supply voltage; a lamp; and a terminal board (“T board”) which receives the high voltage from the IP board to turn on the lamp, receives the supply voltage from the IP board to transfer the supply voltage to the IP board, in which the IP board transfers the high voltage to the T board after the IP board receives the supply voltage from the T board.Type: GrantFiled: January 9, 2012Date of Patent: September 2, 2014Assignee: Samsung Display Co., Ltd.Inventors: Ju-Sung Cho, Song-Yi Han, Kyun-Ho Kim, Seung-Young Choi
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Patent number: 8744290Abstract: An apparatus and method of protecting a fuser unit and an image forming apparatus having the same include a fuser drive motor portion to drive the fuser unit, a power detecting portion to detect power that is supplied to the fuser unit, and a power cutoff portion to cut off the power supplied to the fuser unit when a motor rotation signal is not output from the fuse drive motor portion and the power detecting portion detects the power that is supplied to the fuser unit. The fuser unit protecting apparatus and method and the image forming apparatus including the fuser unit protecting apparatus are configured to detect rotation of a fuser drive motor and supply of an alternating current required for a temperature rise and cut off the power supply when abnormal conditions occur, to prevent a continuous rise in a temperature of the fuser unit as well as deformation thereof.Type: GrantFiled: January 17, 2012Date of Patent: June 3, 2014Assignee: SAMSUNG Electronics Co., Ltd.Inventor: Seung-young Choi
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Publication number: 20130321484Abstract: A method of driving a light-source module includes adjusting a frequency of a boosting switching signal based on a dimming signal which controls luminance of a light-emitting diode (“LED”) string of the light-source module, where the LED string comprises a plurality of LEDs connected to each other in series, and controlling a main transistor in response to the boosting switching signal to transfer a driving voltage to the LED string.Type: ApplicationFiled: January 16, 2013Publication date: December 5, 2013Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Seung-Wan KIM, Min-Soo CHOI, Gwang-Teak LEE, Tae-Gon IM, Myoung-Soo KIM, Hwan-Woong LEE, Seung-Young CHOI
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Publication number: 20130038232Abstract: A light unit includes: an integrated power (“IP”) board which receives power supply and converts the power supply into a high voltage and a supply voltage; a lamp; and a terminal board (“T board”) which receives the high voltage from the IP board to turn on the lamp, receives the supply voltage from the IP board to transfer the supply voltage to the IP board, in which the IP board transfers the high voltage to the T board after the IP board receives the supply voltage from the T board.Type: ApplicationFiled: January 9, 2012Publication date: February 14, 2013Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ju-Sung CHO, Song-Yi HAN, Kyun-Ho KIM, Seung-Young CHOI
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Publication number: 20120183312Abstract: An apparatus and method of protecting a fuser unit and an image forming apparatus having the same include a fuser drive motor portion to drive the fuser unit, a power detecting portion to detect power that is supplied to the fuser unit, and a power cutoff portion to cut off the power supplied to the fuser unit when a motor rotation signal is not output from the fuse drive motor portion and the power detecting portion detects the power that is supplied to the fuser unit. The fuser unit protecting apparatus and method and the image forming apparatus including the fuser unit protecting apparatus are configured to detect rotation of a fuser drive motor and supply of an alternating current required for a temperature rise and cut off the power supply when abnormal conditions occur, to prevent a continuous rise in a temperature of the fuser unit as well as deformation thereof.Type: ApplicationFiled: January 17, 2012Publication date: July 19, 2012Applicant: Samsung Electronics Co., Ltd.Inventor: Seung-young CHOI
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Patent number: 7554688Abstract: A computer system printing an image using an image printing unit, which prints the image read from an external memory card, and a personal computer with a monitor connected to the image printing unit. If the memory card with the image data has been inserted into the image printing unit and the image printing unit has been connected to the personal computer, read image data including an image number and a user selected image number are transmitted to the personal computer for displaying on the monitor. The image printing unit prints the displayed image data corresponding to the user selected image number in response to a user print request at the image printing unit.Type: GrantFiled: June 23, 2003Date of Patent: June 30, 2009Assignee: Samsung Electronics Co., Ltd.Inventor: Seung Young Choi
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Publication number: 20060235160Abstract: A water-borne resin composition for polyolefin is obtained by graft polymerizing polypropylene chloride resin having a chlorine degree of about 10-40% and an acryl monomer. First, polypropylene chloride resin solution is prepared by mixing about 5-30 parts by weight of polypropylene chloride resin having a chlorine degree of about 10-40 and about 5-30 parts by weight of a hydrophilic solvent. Then, an acryl monomer solution is prepared by mixing about 70-95 parts by weight of an acryl monomer, a solvent and an initiator. The acryl monomer solution is dropped into the polypropylene resin solution at a temperature of about 80-130° C. and thus obtained product is neutralized and diluted. The composition has a good adhesiveness onto polyolefin, so that the composition may be applied as a water-borne paint composition for polyolefin-based substrate.Type: ApplicationFiled: September 12, 2005Publication date: October 19, 2006Inventors: Jong-Sook Park, Seung-Young Choi, Chul-Yong Kim
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Publication number: 20060235138Abstract: In order to prepare an alkaline expansive core-shell emulsion resin composition applicable to an aqueous base coat paint composition for an automobile using a urethane aqueous dispersion as an emulsifying agent, first, anionic urethane aqueous dispersion having an acid value of about 50-150 mgKOH/g is prepared. Then, an alkaline expansive core-shell emulsion resin is prepared by using the urethane aqueous dispersion as an emulsifying agent. Flowing or stain after coating may be prevented when using a paint composition prepared by using thus prepared emulsion resin. Water-resistance of a coating layer and alignment of metallic particles are improved.Type: ApplicationFiled: September 12, 2005Publication date: October 19, 2006Inventors: Hoon Chung, Seung-Young Choi, Jong-Myung Hong
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Publication number: 20040008374Abstract: A computer system printing an image using an image printing unit, which prints the image read from an external memory card, and a personal computer with a monitor connected to the image printing unit. If the memory card with the image data has been inserted into the image printing unit and the image printing unit has been connected to the personal computer, read image data including an image number and a user selected image number are transmitted to the personal computer for displaying on the monitor. The image printing unit prints the displayed image data corresponding to the user selected image number in response to a user print request at the image printing unit.Type: ApplicationFiled: June 23, 2003Publication date: January 15, 2004Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: Seung Young Choi
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Patent number: 6644772Abstract: Disclosed are an inkjet multifunction device having a function of attempting to correct malfunctioning nozzles. The inkjet multifunction device includes a printing unit for printing a test pattern, a scanner for scanning the printed test pattern, and a control unit for determining whether respective nozzles in the printing unit malfunction based on the scanned test pattern. The control unit controls the printing unit in order for the nozzles determined as malfunctioned to perform spitting. The determination on whether the nozzles malfunction and the purging of the nozzles are repeatedly performed by the predetermined number of times, and the test step stops if it is determined that all the nozzles normally operate after the repetition operation. Paper and ink can be saved since the purging is selectively performed only on nozzles deemed to be malfunctioning, and meaningless testing and purging operations are prevented from occurring in the case of where there is an absence of malfunctioning nozzles.Type: GrantFiled: October 23, 2001Date of Patent: November 11, 2003Assignee: Samsung Electronics Co., Ltd.Inventor: Seung-Young Choi
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Publication number: 20020171699Abstract: Disclosed are an inkjet multifunction device having a function of attempting to correct malfunctioning nozzles. The inkjet multifunction device includes a printing unit for printing a test pattern, a scanner for scanning the printed test pattern, and a control unit for determining whether respective nozzles in the printing unit malfunction based on the scanned test pattern. The control unit controls the printing unit in order for the nozzles determined as malfunctioned to perform spitting. The determination on whether the nozzles malfunction and the purging of the nozzles are repeatedly performed by the predetermined number of times, and the test step stops if it is determined that all the nozzles normally operate after the repetition operation. Paper and ink can be saved since the purging is selectively performed only on nozzles deemed to be malfunctioning, and meaningless testing and purging operations are prevented from occurring in the case of where there is an absence of malfunctioning nozzles.Type: ApplicationFiled: October 23, 2001Publication date: November 21, 2002Inventor: Seung-Young Choi