Patents by Inventor Su-Kyoung Chae
Su-Kyoung Chae 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: 10601817Abstract: A secured device including a security hardware module and a method thereof are provided. The secured device generates first user authentication information based on a user input, generates encryption key generation information corresponding to the first user authentication information, receives second user authentication information from an electronic device, and transmits to the electronic device the encryption key generation information corresponding to the first user authentication information when the second user authentication information matches the first user authentication information. The first user authentication information and the encryption key generation information are secured by the security hardware module.Type: GrantFiled: February 2, 2017Date of Patent: March 24, 2020Assignee: Hewlett-Packard Development Company, L.P.Inventors: Jae-yoon Lee, Hyun-sook Rhee, Su-kyoung Chae
-
Publication number: 20170223015Abstract: A secured device including a security hardware module and a method thereof are provided. The secured device generates first user authentication information based on a user input, generates encryption key generation information corresponding to the first user authentication information, receives second user authentication information from an electronic device, and transmits to the electronic device the encryption key generation information corresponding to the first user authentication information when the second user authentication information matches the first user authentication information. The first user authentication information and the encryption key generation information are secured by the security hardware module.Type: ApplicationFiled: February 2, 2017Publication date: August 3, 2017Inventors: Jae-yoon LEE, Hyun-sook RHEE, Su-kyoung CHAE
-
Patent number: 8273311Abstract: Disclosed is an apparatus and method for injecting liquid-drops of particle mixture liquid including a mixture of biological particles, affecting magnetic field, and having only positive particles, which are combined with magnetic responsive material, separated by magnetic force, and having negative particles, which are not combined with magnetic responsive material, precipitated by gravity.Type: GrantFiled: January 11, 2007Date of Patent: September 25, 2012Assignee: Korea Institute of Science and TechnologyInventors: Kang Sun Lee, Ji Yoon Kang, Sung Shin Ryu, In Hye Lee, Choong Kim, Su Kyoung Chae, Jin Woo Lee
-
Patent number: 8265532Abstract: An image forming apparatus that includes an intermediate transfer belt (ITB) that has a mark, a sensor that detects the mark, a driving unit that drives the ITB, and a control unit that controls the driving speed of the driving unit, during a certain period of time after completing a printing operation, according to the detection of the mark by the sensor.Type: GrantFiled: October 2, 2009Date of Patent: September 11, 2012Assignee: Samsung Electronics Co., Ltd.Inventor: Su-kyoung Chae
-
Patent number: 8200110Abstract: A printing apparatus includes a detection unit which detects a rotation period of a transfer belt, and a printing control unit which performs a printing preparation operation, and detects the rotation period if the printing preparation operation is started, and performs printing in the detected rotation period if the printing preparation operation is completed. Accordingly, a rotation period of the transfer belt is detected while performing the printing preparation operation, so that an initial printing time can be reduced.Type: GrantFiled: July 15, 2008Date of Patent: June 12, 2012Assignee: Samsung Electronics Co., LtdInventor: Su-kyoung Chae
-
Patent number: 8032045Abstract: A device for fusing and fixing a transferred toner of a predetermined image onto a print paper is provided. In particular, a fusing device which can instantly control induced current provided to a fusing unit in an image printing apparatus which heats the fusing unit using the induced current is provided. The fusing device includes a fusing unit which is resistance heated or induction heated by an induced current, and fuses the toner onto the print paper using the generated heat. A sensing unit senses the temperature of the fusing unit. A reference current generating unit generates a predetermined reference current to heat the fusing unit to reach a predetermined temperature based on the temperature of the sensed fusing unit and the reference temperature. A pulse width modulation signal generating unit generates a pulse width modulation signal for generating the induced current so that the induced current corresponding to the reference current is supplied to the fusing unit.Type: GrantFiled: December 14, 2005Date of Patent: October 4, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Young-min Chae, Sang-yong Han, Hwan-guem Kim, Durk-hyun Cho, Su-Kyoung Chae
-
Publication number: 20100104306Abstract: An image forming apparatus that includes an intermediate transfer belt (ITB) that has a mark, a sensor that detects the mark, a driving unit that drives the ITB, and a control unit that controls the driving speed of the driving unit, during a certain period of time after completing a printing operation, according to the detection of the mark by the sensor.Type: ApplicationFiled: October 2, 2009Publication date: April 29, 2010Applicant: Samsung Electronics Co., Ltd.Inventor: Su-kyoung Chae
-
Patent number: 7598476Abstract: A fusing apparatus in an image forming apparatus that heats a fusing unit by applying an induced current is provided. The flicker characteristics of the fusing apparatus are improved by gradually increasing the amount of induced current applied to the fusing unit for a predetermined amount of time so that the amount of induced current applied to the fusing unit is prevented from severely varying. The fusing apparatus comprises a fusing unit which is resistance-heated or induction-heated by applying an induced current and fuses toner onto paper using the heat. The fusing apparatus further comprises a pulse width modulation (PWM) signal generation unit which generates a PWM signal in response to the ON signal so that the amount of induced current input to the fusing unit gradually increases to a reference current.Type: GrantFiled: December 13, 2005Date of Patent: October 6, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Young-Min Chae, Hwan-Guem Kim, Durk-Hyun Cho, Su-Kyoung Chae, Sang-Yong Han
-
Patent number: 7590372Abstract: A multi-pass type color image forming apparatus. The multi-pass type color image forming apparatus includes an indicating member which is provided at a camshaft and has a plurality of indicating portions, a sensing part which detects the plurality of indicating portions, and a control unit which receives a signal from the sensing part when the indicating member passes by the sensing part by the rotation of the camshaft, and determines a home position by a rotational position of the camshaft when a signal pattern from a sequence of signals from the sensing part corresponds with a preset reference pattern. Accordingly, the home position of the camshaft can be determined in a short amount of time regardless of the slip between the cams and the push caps, so that the warm up time can be shortened and the generation time of noise caused by the contact between the cams and the push caps can be minimized.Type: GrantFiled: September 19, 2007Date of Patent: September 15, 2009Assignee: Samsung Electronics Co., LtdInventors: Su Kyoung Chae, Sung Dae Kim, Young Min Yoon, Gun Ho Kim
-
Patent number: 7573600Abstract: A system and method of controlling printing are disclosed. The system and method comprise inputting image data printed by a printing section and a preset value for a print medium's size corresponding to the image data; measuring a size of each print medium being fed to the printing section; comparing the measured value for the each measured print medium and the preset value for the print medium's size; counting the number of times in which difference is occurred between the measured value and the preset value; and determining whether the print mediums fed to the printing section are different from the preset print medium's size by comparing the counted number of times and a predetermined reference number of times.Type: GrantFiled: October 7, 2004Date of Patent: August 11, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Jun-bae Jeon, Cheol-ju Yang, Su-kyoung Chae
-
Publication number: 20090197329Abstract: Disclosed is an apparatus and method for injecting liquid-drops of particle mixture liquid including a mixture of biological particles, affecting magnetic field, and having only positive particles, which are combined with magnetic responsive material, separated by magnetic force, and having negative particles, which are not combined with magnetic responsive material, precipitated by gravity.Type: ApplicationFiled: January 11, 2007Publication date: August 6, 2009Inventors: Kang Sun Lee, Ji Yoon Kang, Sung Shin Ryu, In Hye Lee, Choong Kim, Su Kyoung Chae, Jin Woo Lee
-
Publication number: 20090041479Abstract: An image forming apparatus and a method of detecting a home position error are provided. The image forming apparatus includes a plurality of developing units, a cam shaft, and a plurality of cams that are formed on the cam shaft to correspond to the respective developing units. A power transmitting element is installed between the plurality of developing units and the plurality of cams and selectively transmits a rotational force of a driving source to the plurality of developing units according to a rotational phase of the cam shaft. An indicating element is installed on the cam shaft and includes a plurality of indicating units. A sensor senses the plurality of indicating units. A home position error is detected each time when the indicating units pass through the sensor.Type: ApplicationFiled: October 3, 2008Publication date: February 12, 2009Inventors: Jun-bae Jeon, Cheol-ju Yang, Su-kyoung Chae, Young-joon Lee
-
Publication number: 20090041494Abstract: A printing apparatus includes a detection unit which detects a rotation period of a transfer belt, and a printing control unit which performs a printing preparation operation, and detects the rotation period if the printing preparation operation is started, and performs printing in the detected rotation period if the printing preparation operation is completed. Accordingly, a rotation period of the transfer belt is detected while performing the printing preparation operation, so that an initial printing time can be reduced.Type: ApplicationFiled: July 15, 2008Publication date: February 12, 2009Applicant: Samsung Electronics Co., Ltd.Inventor: Su-kyoung Chae
-
Patent number: 7477855Abstract: Disclosed are a method of preventing overheating of a fuser assembly and an apparatus using the same. The method of preventing overheating of a fuser assembly includes inspecting whether a temperature of a fuser assembly is higher than a predetermined temperature. If the temperature of the fuser assembly is higher than the predetermined temperature it is determined whether there is a print command. A print sheet is passed through the fuser assembly, and conveyed to a predetermined location when there is no print command. The temperature is again inspected if there is no print command. If the temperature is lower than the predetermined temperature it is determined whether a predetermined time has lapsed. The temperature is again inspected if the predetermined time did not lapse.Type: GrantFiled: May 26, 2005Date of Patent: January 13, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Su-kyoung Chae, Cheol-ju Yang, Jun-bae Jeon
-
Patent number: 7450888Abstract: An image forming apparatus and a method of detecting a home position error are provided. The image forming apparatus includes a plurality of developing units, a cam shaft, and a plurality of cams that are formed on the cam shaft to correspond to the respective developing units. A power transmitting element is installed between the plurality of developing units and the plurality of cams and selectively transmits a rotational force of a driving source to the plurality of developing units according to a rotational phase of the cam shaft. An indicating element is installed on the cam shaft and includes a plurality of indicating units. A sensor senses the plurality of indicating units. A home position error is detected each time when the indicating units pass through the sensor.Type: GrantFiled: July 21, 2006Date of Patent: November 11, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Jun-bae Jeon, Cheol-ju Yang, Su-kyoung Chae, Young-joon Lee
-
Patent number: 7447453Abstract: An apparatus and method of driving a transfer belt are disclosed. The apparatus and method comprise driving the transfer belt provided in an image forming apparatus by a predetermined distance when the transfer belt has been stopped for a predetermined time, and thus varying the contact portion with a plurality of rollers provided on the transfer belt. Image contamination due to deformation on the belt can be avoided. Additionally, because the rotation time of the driving source can be set to a predetermined time during the power-saving mode, power consumption can be minimized.Type: GrantFiled: August 19, 2004Date of Patent: November 4, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Yong-geun Kim, Cheol-ju Yang, Su-kyoung Chae, Moon-bae Park
-
Patent number: 7437091Abstract: Disclosed is a method for controlling the temperature of a heat roller and an image forming apparatus based on the same. The image forming apparatus of the present invention includes: a heat roller for heating a printing paper having a toner image formed thereon to completely fuse the toner image to the printing paper; a heat lamp for heating the heat roller; and a controller for controlling the driving of the heat lamp, whereby the heat roller is maintained at a designated target temperature level during a pre-printing period. As such, it becomes possible to prevent a problem with the fusing process caused by low temperature of the heat roller during the pre-printing period for subsequent printing.Type: GrantFiled: July 1, 2005Date of Patent: October 14, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Su-Kyoung Chae, Cheol-Ju Yang, Jun-Bae Jeon
-
Publication number: 20080080882Abstract: A multi-pass type color image forming apparatus. The multi-pass type color image forming apparatus includes an indicating member which is provided at a camshaft and has a plurality of indicating portions, a sensing part which detects the plurality of indicating portions, and a control unit which receives a signal from the sensing part when the indicating member passes by the sensing part by the rotation of the camshaft, and determines a home position by a rotational position of the camshaft when a signal pattern from a sequence of signals from the sensing part corresponds with a preset reference pattern. Accordingly, the home position of the camshaft can be determined in a short amount of time regardless of the slip between the cams and the push caps, so that the warm up time can be shortened and the generation time of noise caused by the contact between the cams and the push caps can be minimized.Type: ApplicationFiled: September 19, 2007Publication date: April 3, 2008Applicant: Samsung Electronics Co., LtdInventors: Su Kyoung CHAE, Sung Dae Kim, Young Min Yoon, Gun Ho Kim
-
Publication number: 20070019993Abstract: An image forming apparatus and a method of detecting a home position error are provided. The image forming apparatus includes a plurality of developing units, a cam shaft, and a plurality of cams that are formed on the cam shaft to correspond to the respective developing units. A power transmitting element is installed between the plurality of developing units and the plurality of cams and selectively transmits a rotational force of a driving source to the plurality of developing units according to a rotational phase of the cam shaft. An indicating element is installed on the cam shaft and includes a plurality of indicating units. A sensor senses the plurality of indicating units. A home position error is detected each time when the indicating units pass through the sensor.Type: ApplicationFiled: July 21, 2006Publication date: January 25, 2007Inventors: Jun-bae Jeon, Cheol-ju Yang, Su-kyoung Chae, Young-joon Lee
-
Publication number: 20070009274Abstract: A device for fusing and fixing a transferred toner of a predetermined image onto a print paper is provided. In particular, a fusing device which can instantly control induced current provided to a fusing unit in an image printing apparatus which heats the fusing unit using the induced current is provided. The fusing device includes a fusing unit which is resistance heated or induction heated by an induced current, and fuses the toner onto the print paper using the generated heat. A sensing unit senses the temperature of the fusing unit. A reference current generating unit generates a predetermined reference current to heat the fusing unit to reach a predetermined temperature based on the temperature of the sensed fusing unit and the reference temperature. A pulse width modulation signal generating unit generates a pulse width modulation signal for generating the induced current so that the induced current corresponding to the reference current is supplied to the fusing unit.Type: ApplicationFiled: December 14, 2005Publication date: January 11, 2007Inventors: Young-min Chae, Sang-yong Han, Hwan-guem Kim, Durk-hyun Cho, Su-Kyoung Chae