Patents by Inventor Se-hyun Lyu
Se-hyun Lyu 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: 9557696Abstract: An image forming apparatus includes a main controller unit provided in a main body of the image forming apparatus. The main controller includes a replacement component management memory to store lifespan information of a replacement component is provided in An authentication operation is performed with respect to the replacement component management memory, and the lifespan information of the replacement component is encrypted and stored in the replacement component management memory. Accordingly, the security of the main controller unit may be enhanced and illegal use of the replacement component may be prevented.Type: GrantFiled: June 23, 2014Date of Patent: January 31, 2017Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Yoon Seop Eom, Se Hyun Lyu, Jung Hwan Kim
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Publication number: 20140301752Abstract: An image forming apparatus includes a main controller unit provided in a main body of the image forming apparatus. The main controller includes a replacement component management memory to store lifespan information of a replacement component is provided in An authentication operation is performed with respect to the replacement component management memory, and the lifespan information of the replacement component is encrypted and stored in the replacement component management memory. Accordingly, the security of the main controller unit may be enhanced and illegal use of the replacement component may be prevented.Type: ApplicationFiled: June 23, 2014Publication date: October 9, 2014Inventors: Yoon Seop EOM, Se Hyun LYU, Jung Hwan KIM
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Patent number: 8762716Abstract: An image forming apparatus includes a main controller unit provided in a main body of the image forming apparatus. The main controller includes a replacement component management memory to store lifespan information of a replacement component is provided in An authentication operation is performed with respect to the replacement component management memory, and the lifespan information of the replacement component is encrypted and stored in the replacement component management memory. Accordingly, the security of the main controller unit may be enhanced and illegal use of the replacement component may be prevented.Type: GrantFiled: October 8, 2010Date of Patent: June 24, 2014Assignee: SAMSUNG Electronics Co., Ltd.Inventors: Yoon Seop Eom, Se Hyun Lyu, Jung Hwan Kim
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Patent number: 8045890Abstract: An image forming apparatus includes a photosensitive body, and a plurality of developing devices to develop a color image on the photosensitive body. The plurality of developing devices include fixed-position developing devices, of which positions relative to the photosensitive body are fixed, and moveable developing devices, of which positions relative to the photosensitive body are changed. Accordingly, the image forming apparatus can be manufactured compactly, by mounting four developing devices, e.g., for yellow, magenta, cyan and black for the color printing such that three developing devices stand by at the respective development positions and one developing device variably moves to the development position so that the photosensitive body is reduced in diameter when compared to a conventional photosensitive body which opposes four developing devices.Type: GrantFiled: February 28, 2008Date of Patent: October 25, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Hun Sup Kim, Se-Hyun Lyu
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Publication number: 20110093702Abstract: An image forming apparatus includes a main controller unit provided in a main body of the image forming apparatus. The main controller includes a replacement component management memory to store lifespan information of a replacement component is provided in An authentication operation is performed with respect to the replacement component management memory, and the lifespan information of the replacement component is encrypted and stored in the replacement component management memory. Accordingly, the security of the main controller unit may be enhanced and illegal use of the replacement component may be prevented.Type: ApplicationFiled: October 8, 2010Publication date: April 21, 2011Applicant: Samsung Electronics Co., LtdInventors: Yoon Seop EOM, Se Hyun Lyu, Jung Hwan Kim
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Patent number: 7756445Abstract: A transfer unit-fixing apparatus to integrally fix a transfer unit on a door, and an image forming device having the same are disclosed. The transfer unit-fixing apparatus includes a position fixing unit to pivotally support a first part of the transfer unit on the door and a locking unit to lock a second part of the transfer unit to the door. The transfer unit can be easily assembled and disassembled to and from the door by the position fixing unit and the locking unit, and thus the image forming device can be easily assembled, maintained and repaired.Type: GrantFiled: May 16, 2006Date of Patent: July 13, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Jin-soo Lee, Se-hyun Lyu, Heung-sup Jeong
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Patent number: 7654518Abstract: An image forming apparatus including a guide unit including: a length-adjusting assembly including a length-adjusting rack part, which is adjusted according to a length of printing medium; a width-adjusting assembly including a width-adjusting rack part, which is adjusted according to a width of printing medium; and a pinion assembly, which interlocks the width-adjusting assembly interlock with the length-adjusting assembly. The pinion assembly includes a first pinion part, which engages with the length-adjusting rack, and a second pinion part, which engages with the width-adjusting rack and rotates together with the first pinion part. The first pinion part and the second pinion part have a stepped shape.Type: GrantFiled: February 20, 2008Date of Patent: February 2, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Jong Tae Kim, Se Hyun Lyu
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Patent number: 7486906Abstract: An electrophotographic includes a main frame, a photosensitive drum unit vertically detachably installed on the main frame and having a photosensitive drum on which an electrostatic latent image is formed, and an intermediate transfer unit vertically detachably installed on the main frame and having a transfer belt to which a toner image is transferred from the photosensitive drum, wherein the intermediate transfer unit is installed above the photosensitive drum unit.Type: GrantFiled: April 12, 2004Date of Patent: February 3, 2009Assignee: Samsung Electronics Co., LtdInventors: Heung-sup Jeong, Se-hyun Lyu, Byeong-hwa Ahn, Woo-chul Jung, Young-min Yoon, Jae-myoung Choi, Jin-soo Lee, Heung-kyu Jang
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Patent number: 7483048Abstract: An apparatus is provided for fixing a shaft of a cartridge and an image forming device including the apparatus. The apparatus includes a fixed supporting part formed at a frame, and rotatably supporting a first end of at least one shaft of at least one cartridge. A movable supporting part is formed at the frame to be movable between a first position and a second position, and rotatably supporting a second end of the shaft of the cartridge. An operating part operates to move the movable supporting part between the first position and the second position. The fixed supporting part and the movable supporting part fix the shaft of the cartridge, and the movable supporting part works together with opening and closing operation of the cover. The shaft of the cartridge is fixed in the proper position, but also a corresponding cartridge, such as an image forming cartridges, is easily assembled and disassembled in the frame of the main body when the cartridge is mounted in the frame.Type: GrantFiled: July 14, 2005Date of Patent: January 27, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Woo-chul Jung, Se-hyun Lyu, Heung-sup Jeong
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Patent number: 7450886Abstract: A developer-driving device and an image forming apparatus having the same are provided. The developer-driving device includes a photosensitive drum-driving unit that rotates a photosensitive drum and a developing roller-driving unit that rotates a developing roller. Each of the photosensitive drum-driving unit and the developing roller-driving unit includes a one-way power transmission unit. The one-way power transmission unit idles when a developer is being mounted on a main body and transmits power to the photosensitive drum and the developing roller after the developer is mounted on the main body.Type: GrantFiled: January 25, 2006Date of Patent: November 11, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Byeong-hwa Ahn, Seock-deock Hong, Se-hyun Lyu
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Patent number: 7448623Abstract: A paper feeding mechanism for an image forming apparatus includes a drive roller rotated by a first shaft driven by a motor. A press roller is supported by a second shaft which is parallel to and spaced apart from the first shaft. The press roller is pressed against the drive roller, and is driven by the drive roller. A cam pushes the second shaft (and therefore the press roller) away from the drive roller to prevent unnecessary external forces from being exerted on paper being fed through the rollers. The cam is actuated by clutching means for transferring rotating force of the first shaft to the cam to rotate the cam when it is necessary to move the press roller away from the drive roller.Type: GrantFiled: April 4, 2005Date of Patent: November 11, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Byeong-hwa Ahn, Se-hyun Lyu
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Publication number: 20080224388Abstract: An image forming apparatus including a guide unit including: a length-adjusting assembly including a length-adjusting rack part, which is adjusted according to a length of printing medium; a width-adjusting assembly including a width-adjusting rack part, which is adjusted according to a width of printing medium; and a pinion assembly, which interlocks the width-adjusting assembly interlock with the length-adjusting assembly. The pinion assembly includes a first pinion part, which engages with the length-adjusting rack, and a second pinion part, which engages with the width-adjusting rack and rotates together with the first pinion part. The first pinion part and the second pinion part have a stepped shape.Type: ApplicationFiled: February 20, 2008Publication date: September 18, 2008Applicant: Samsung Electronics Co., Ltd.Inventors: JONG TAE KIM, Se Hyun Lyu
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Publication number: 20080226348Abstract: An image forming apparatus includes a photosensitive body, and a plurality of developing devices to develop a color image on the photosensitive body. The plurality of developing devices include fixing type developing devices, of which positions relative to the photosensitive body are fixed, and moving type developing devices, of which positions relative to the photosensitive body are changed. Accordingly, the image forming apparatus can be manufactured compactly, by mounting four developing devices, e.g., for yellow, magenta, cyan and black for the color printing such that three developing devices stand by at the respective development positions and one developing device variably moves to the development position so that the photosensitive body is reduced in diameter when compared to a conventional photosensitive body which opposes four developing devices.Type: ApplicationFiled: February 28, 2008Publication date: September 18, 2008Applicant: Samsung Electronics Co., Ltd.Inventors: Hun Sup Kim, Se-Hyun Lyu
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Publication number: 20080219728Abstract: An image forming apparatus and a fixing unit thereof are disclosed. The fixing unit includes a heating roller, a press roller mounted in close contact with the heating roller to apply heat and pressure to the printable medium with the heating roller, a press lever to press the press roller toward the heating roller, a press spring connected to the press lever, a release device to operate the press lever to release pressing force exerted on the press roller, and a power conversion device to transmit driving power generated from a main driving source to drive the heating roller to the release device. Accordingly, since the press lever pressing the press roller to closely contact the heating roller can be operated by the driving power of the main driving source, the jammed printable medium can be easily removed.Type: ApplicationFiled: February 27, 2008Publication date: September 11, 2008Applicant: Samsung Electronics Co., Ltd.Inventors: Jae Hoon Lee, Hak Kyum Kim, Se Hyun Lyu
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Patent number: 7336916Abstract: An electrophotographic image forming apparatus includes a print unit that prints an image by an electrophotographic process and has a developer cartridge having a photoreceptor drum. A door opens and closes one side of the print unit to install and remove the developer cartridge. A fixing member is selectively shifted between a first position where the developer cartridge is installed and removed and a second position where the developer cartridge is fixed to the print unit by opening and closing the door.Type: GrantFiled: May 27, 2005Date of Patent: February 26, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Woo-chul Jung, Heung-sup Jeong, Se-hyun Lyu
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Patent number: 7321381Abstract: Provided is an image forming apparatus, which comprises a contamination prevention member that covers a top surface of a light window with one side exposed to an outside of a main body, which prevents a contamination material, such as dust, from getting onto the light window, and which a user can recognize and remove easily.Type: GrantFiled: June 30, 2004Date of Patent: January 22, 2008Inventors: Heung-kyu Jang, Se-hyun Lyu, Woo-chul Jung
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Patent number: 7289749Abstract: In an electrophotographic printer including a photosensitive drum unit having a photosensitive drum, a plurality of development units each having a developing roller, an intermediate transfer unit having a transfer belt to which an image is transferred from the photosensitive drum, a waste toner storage container to store waste toner generated at the photosensitive drum unit and the intermediate transfer unit, and a sheet transport unit which finally holds the image. The electrophotographic printer also includes first through third doors provided to mount or dismount the plurality of development units, the photosensitive drum unit and intermediate transfer unit, and the waste toner storage container, respectively, and a fourth door provided to access the sheet transport unit.Type: GrantFiled: April 12, 2004Date of Patent: October 30, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Se-hyun Lyu, Heung-sup Jeong, Byeong-hwa Ahn, Woo-chul Jung, Young-min Yoon, Jae-myoung Choi, Jin-soo Lee, Heung-kyu Jang
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Patent number: 7272341Abstract: Provided is an image forming apparatus. The image forming apparatus includes a print unit printing having a plurality of developer cartridges, each of which has a photoreceptor drum disposed therein. A plurality of fixing members are movable between a first position where the developer cartridges are installed and removed and a second position where the developer cartridges are fixed to the print unit. A pinion includes a female screw portion and a first sliding member includes a male screw portion that is engaged with the female screw portion, sliding backwards and forwards as the pinion rotates, and moving the fixing members to the first position or the second position.Type: GrantFiled: October 12, 2005Date of Patent: September 18, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Woo-Chul Jung, Heung-Sup Jeong, Se-Hyun Lyu
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Patent number: 7266321Abstract: A voltage supply device for developing devices of a color image forming apparatus has a printed circuit board (PCB) connected with a high voltage supply source, a plurality of fixed contact point terminals provided at one end of the respective color developing devices, and a plurality of voltage changeover units for selectively connecting the PCB and the fixed contact point terminals to selectively supply the voltage from the high voltage supply source to the respective color developing devices. With the voltage supply device, contact point changeover is enabled without having to move the developing device, by using a relay part of a relatively simple structure during the change of developing device. Accordingly, deterioration of printing quality due to shock from the contact with the developing device is avoided, and the reliability of high voltage contact point changeover is improved.Type: GrantFiled: September 29, 2003Date of Patent: September 4, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Byeong-hwa Ahn, Young-min Yoon, Seung-yoon Lee, Se-hyun Lyu
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Patent number: 7257346Abstract: A fusing roller regenerating apparatus of a fusing device in an image forming apparatus includes a coating unit coating a fusing roller using a dip coating method to form a regenerated coating layer to a predetermined thickness, and a heating unit including a heating body spaced apart from a surface of the fusing roller by a predetermined distance to harden the regenerated coating layer formed on the fusing roller by the coating unit. A method of regenerating the fusing roller includes injecting a coating liquid into the coating liquid tub through a coating liquid injection portion to form the regenerated coating layer to the predetermined thickness by rotating the fusing roller after the injection of the coating liquid, hardening the regenerated coating layer using the heating body, and discharging a remaining portion of the coating liquid through the coating liquid discharging portion after the hardening of the regenerated coating layer.Type: GrantFiled: May 21, 2003Date of Patent: August 14, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Se-hyun Lyu, Jin-soo Lee