Patents by Inventor Kyu-cheol Shin

Kyu-cheol Shin 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: 7110685
    Abstract: A transfer power supply apparatus of an image forming machine which can maintain a predetermined degree of the quality of an image on a print medium even when the temperature of the surrounding environment varies. The image forming machine includes a voltage computation unit computing an appropriate voltage corresponding to resistance of an intermediate transfer medium, an output voltage generator generating a transfer voltage according to a signal output from the voltage computation unit, and a switching unit selectively applying a voltage output from the output voltage generator, wherein the switching unit connects a voltage output from the output voltage generator to a transfer roller when the image created on the intermediate transfer medium is transferred to a print medium, and connects a voltage output from the output voltage generator to a transfer backup roller when the image is not transferred to the print medium.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: September 19, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Kyu cheol Shin
  • Publication number: 20060182459
    Abstract: A color image forming apparatus which, in a sequential order for each of plural colors of a composite color image, charges plural photosensitive bodies, exposes electrostatic latent images on the plural photosensitive bodies, develops latent images on the photosensitive bodies into color images, and transfers the color images to sequentially form images of each of the plural colors one on another to form the composite color image and transcribing the composite color image onto a printing medium. The color image forming apparatus includes: plural charging units which perform the charging process for each of the plural colors; plural exposing units which perform the exposing process for each of the plural colors; plural developing units which perform the developing process for each of the plural colors; and plural transfer units which perform the transfer process for each of the plural colors.
    Type: Application
    Filed: April 6, 2006
    Publication date: August 17, 2006
    Inventor: Kyu-cheol Shin
  • Patent number: 7058333
    Abstract: A color image forming apparatus which, in a sequential order for each of plural colors of a composite color image, charges plural photosensitive bodies, exposes electrostatic latent images on the plural photosensitive bodies, develops latent images on the photosensitive bodies into color images, and transfers the color images to sequentially form images of each of the plural colors one on another to form the composite color image and transcribing the composite color image onto a printing medium. The color image forming apparatus includes: plural charging units which perform the charging process for each of the plural colors; plural exposing units which perform the exposing process for each of the plural colors; plural developing units which perform the developing process for each of the plural colors; and plural transfer units which perform the transfer process for each of the plural colors.
    Type: Grant
    Filed: November 14, 2003
    Date of Patent: June 6, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Kyu-cheol Shin
  • Patent number: 7054565
    Abstract: An electrophotographic image forming apparatus and a method of controlling development includes a current measuring unit to measure a developing current flowing between a developing roller and a photosensitive medium, and a controlling unit to calculate at least one of a thickness of a photosensitive film of the photosensitive medium, a thickness of a developer on a surface of the developing roller, and the quantity of development on the surface of the photosensitive medium using the measured developing current, and then display information concerning replacement of consumables, or control a developer supply vector and a development vector on a basis of the calculated value.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: May 30, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Kyu-cheol Shin
  • Publication number: 20050180766
    Abstract: A developing method of a liquid type electrophotographic image forming device includes forming an image area corresponding to an electrostatic latent image by scanning light onto a surface of a photosensitive drum that is charged to a predetermined electric potential, attaching a developer on a surface of a developing roller by applying a first bias voltage to a deposit roller and a second bias voltage to the developing roller, developing the image area on the photosensitive drum using the developer attached to the developing roller, and turning off the second and first bias voltages applied to the developing roller and the deposit roller, respectively, when a non-image area of the photosensitive drum contacts the developing roller.
    Type: Application
    Filed: December 28, 2004
    Publication date: August 18, 2005
    Inventors: Joong-gwang Shin, Kyu-cheol Shin, Sung-keun Park
  • Patent number: 6895204
    Abstract: An image forming system of an electrophotographic printer. The system includes a photosensitive body on which an electrostatic latent image is formed, a developing unit which develops the electrostatic latent image with a developer, a transfer body onto which the developed image is transferred, a first image charging unit which charges the image so as to increase an electric adhesive force of the image transferred onto the transfer body, a second image charging unit which charges the image so as to reduce the electric adhesive force of the image transferred onto the transfer body in the rear of the first image charging unit, and a transfer unit which transfers the image passing through the first and second image charging units onto paper.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: May 17, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Kyu-cheol Shin
  • Publication number: 20050053398
    Abstract: A developing device for a liquid electrophotographic image forming apparatus is provided. The developing device may have a developing roller, which supplies ink to a photosensitive body on which an electrostatic latent image is formed and develops the electrostatic latent image. The apparatus may include an ink reservoir in which ink supplied to the developing roller is accommodated, and an ink removal unit, which removes ink remaining in the ink reservoir after a development operation is performed. The ink removal unit may comprise an ink removal member rotatably installed in the ink reservoir that exhausts ink through a through hole formed under the ink reservoir. A driving member rotates the ink removal member. An ink cartridge stores ink exhausted through the through hole.
    Type: Application
    Filed: August 12, 2004
    Publication date: March 10, 2005
    Inventors: Sung-dae Kim, Kyu-cheol Shin, In-yong Song, Joong-gwang Shin
  • Publication number: 20040184825
    Abstract: An electrophotographic image forming apparatus and a method of controlling development includes a current measuring unit to measure a developing current flowing between a developing roller and a photosensitive medium, and a controlling unit to calculate at least one of a thickness of a photosensitive film of the photosensitive medium, a thickness of a developer on a surface of the developing roller, and the quantity of development on the surface of the photosensitive medium using the measured developing current, and then display information concerning replacement of consumables, or control a developer supply vector and a development vector on a basis of the calculated value.
    Type: Application
    Filed: February 13, 2004
    Publication date: September 23, 2004
    Inventor: Kyu-cheol Shin
  • Patent number: 6778799
    Abstract: A liquid electrophotographic image forming apparatus using an ink developing solution having a high concentration where a non-volatile carrier is used as a dispersion solvent includes a photosensitive body, a charge unit increasing a potential of the photosensitive body to a charge potential, an exposure unit projecting a beam onto the photosensitive body and forming a latent electrostatic image, a developing solution supply unit supplying a developing solution to the photosensitive body, the developing solution having a high concentration where a non-volatile carrier is used as a dispersion solvent, a developing unit receiving the developing solution having the high concentration to form a developing film having the high concentration and to develop the latent electrostatic image, a transfer unit contacting the photosensitive body and moving the developed image to a recording medium, and a fixing unit fixing the transferred image in the recording medium at a temperature lower than a flash point of the non-vo
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: August 17, 2004
    Assignee: Samsung Electronics Co. Ltd.
    Inventors: Kyu-cheol Shin, In-yong Song, Jeong-hun Pang
  • Patent number: 6766130
    Abstract: A liquid developer imaging system and a method using the system for developing an image, including a cartridge for containing a developing solution; a developing container for receiving the developing solution supplied from the cartridge via a predetermined supply line; a developing roller partly submerged in the developing solution contained in the developing container, installed to be rotated facing a photosensitive object; and a metering blade for scraping off the developing solution coated on the surface of the developing roller to a predetermined thickness, is provided. According to the system, a developing supply structure can be considerably simplified because a high-density developing solution is directly used in developing an image without a process of diluting the solution, and an image can be developed to have high definition because the concentration of the developing solution coated on the developing roller is regularly controlled by a metering blade.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: July 20, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: In-yong Song, Kyu-cheol Shin, Kwang-ho No, Hyun-seong Shin, Geun-yong Park, Jong-woo Kim, Seung-young Byun, Joong-gwang Shin, Sam-seuk Choi, Yong-su Kim, Woo-yong Park, Jun-hee Cho, Wan-ha Kim
  • Publication number: 20040096236
    Abstract: A color image forming apparatus which, in a sequential order for each of plural colors of a composite color image, charges plural photosensitive bodies, exposes electrostatic latent images on the plural photosensitive bodies, develops latent images on the photosensitive bodies into color images, and transfers the color images to sequentially form images of each of the plural colors one on another to form the composite color image and transcribing the composite color image onto a printing medium.
    Type: Application
    Filed: November 14, 2003
    Publication date: May 20, 2004
    Applicant: SAMSUNG Electronics Co., Ltd.
    Inventor: Kyu-Cheol Shin
  • Patent number: 6738585
    Abstract: An image forming apparatus for and a method of compensating for development mass per area includes a photosensitive body on which an electrostatic latent image for an image is formed, a charger charging the photosensitive body, a developing unit developing the electrostatic latent image of the photosensitive body, a measuring unit measuring a charge current flowing through the photosensitive body from the charger, a comparator comparing the charge current with a reference current, and a controller controlling a developing unit control variable so as to compensate for a variation in a thickness of the photosensitive body according to an output of the comparator. A time indicator of a display informs a user whether the photosensitive body has to be replaced, and deterioration of an image quality caused by a decrease in the thickness of the photosensitive body can be prevented when a potential of the developing unit is controlled.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: May 18, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyu-cheol Shin, In-yong Song
  • Publication number: 20040001730
    Abstract: An image forming system of an electrophotographic printer. The system includes a photosensitive body on which an electrostatic latent image is formed, a developing unit which develops the electrostatic latent image with a developer, a transfer body onto which the developed image is transferred, a first image charging unit which charges the image so as to increase an electric adhesive force of the image transferred onto the transfer body, a second image charging unit which charges the image so as to reduce the electric adhesive force of the image transferred onto the transfer body in the rear of the first image charging unit, and a transfer unit which transfers the image passing through the first and second image charging units onto paper.
    Type: Application
    Filed: December 10, 2002
    Publication date: January 1, 2004
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Kyu-Cheol Shin
  • Publication number: 20030147658
    Abstract: An image forming apparatus for and a method of compensating for development mass per area includes a photosensitive body on which an electrostatic latent image for an image is formed, a charger charging the photosensitive body, a developing unit developing the electrostatic latent image of the photosensitive body, a measuring unit measuring a charge current flowing through the photosensitive body from the charger, a comparator comparing the charge current with a reference current, and a controller controlling a developing unit control variable so as to compensate for a variation in a thickness of the photosensitive body according to an output of the comparator. A time indicator of a display informs a user whether the photosensitive body has to be replaced, and deterioration of an image quality caused by a decrease in the thickness of the photosensitive body can be prevented when a potential of the developing unit is controlled.
    Type: Application
    Filed: September 19, 2002
    Publication date: August 7, 2003
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Kyu-Cheol Shin, In-Yong Song
  • Publication number: 20030147673
    Abstract: A liquid electrophotographic image forming apparatus using an ink developing solution having a high concentration where a non-volatile carrier is used as a dispersion solvent includes a photosensitive body, a charge unit increasing a potential of the photosensitive body to a charge potential, an exposure unit projecting a beam onto the photosensitive body and forming a latent electrostatic image, a developing solution supply unit supplying a developing solution to the photosensitive body, the developing solution having a high concentration where a non-volatile carrier is used as a dispersion solvent, a developing unit receiving the developing solution having the high concentration to form a developing film having the high concentration and to develop the latent electrostatic image, a transfer unit contacting the photosensitive body and moving the developed image to a recording medium, and a fixing unit fixing the transferred image in the recording medium at a temperature lower than a flash point of the non-vo
    Type: Application
    Filed: September 19, 2002
    Publication date: August 7, 2003
    Applicant: Samsung Electronic Co., Ltd.
    Inventors: Kyu-Cheol Shin, In-Yong Song, Jeong-Hun Pang
  • Publication number: 20030044202
    Abstract: A liquid developer imaging system and a method using the system for developing an image, including a cartridge for containing a developing solution; a developing container for receiving the developing solution supplied from the cartridge via a predetermined supply line; a developing roller partly submerged in the developing solution contained in the developing container, installed to be rotated facing a photosensitive object; and a metering blade for scraping off the developing solution coated on the surface of the developing roller to a predetermined thickness, is provided. According to the system, a developing supply structure can be considerably simplified because a high-density developing solution is directly used in developing an image without a process of diluting the solution, and an image can be developed to have high definition because the concentration of the developing solution coated on the developing roller is regularly controlled by a metering blade.
    Type: Application
    Filed: May 13, 2002
    Publication date: March 6, 2003
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: In-yong Song, Kyu-cheol Shin, Kwang-ho No, Hyun-seong Shin, Geun-yong Park, Jong-woo Kim, Seung-young Byun, Joong-gwang Shin, Sam-seuk Choi, Yong-su Kim, Woo-yong Park, Jun-hee Cho, Wan-ha Kim
  • Patent number: 6389256
    Abstract: A liquid electrophotographic color image forming apparatus includes a main charger for charging a surface of a photoreceptor web to a predetermined charging electric potential, an optical scanning unit for scanning light onto the photoreceptor web to form an electrostatic latent image, and developing rollers for yellow, cyan, magenta and black colors, sequentially installed in a direction that the photoreceptor web circulates, for developing the electrostatic latent image using developer for each color. Further included are auxiliary chargers for cyan, magenta and black colors, installed downstream of each of the developing rollers, for additionally charging the photoreceptor web, the electric potential of which is lowered after development for each of yellow, cyan and magenta colors.
    Type: Grant
    Filed: January 29, 2001
    Date of Patent: May 14, 2002
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: In-yong Song, Kyu-cheol Shin
  • Patent number: 6385424
    Abstract: An electrophotographic printing apparatus having a structure so that differences between surface energies of components of the electrophotographic printing apparatus contributing to image transfer are maintained within predetermined ranges, and an image transferring method thereof. The electrophotographic printing apparatus includes a photosensitive medium, developing units, a drying roller and a transfer unit having a transfer roller, whereby the peeling force (PFD) of the drying roller is in a range of 0 gram force per inch (gf/inch)≦PFD≦300 gram force per inch (gf/inch), the peeling force (PFO) of the photosensitive medium is in a range of 0 gram force per inch (gf/inch)≦PFO≦80 gram force per inch (gf/inch), and the peeling force (PFT) of the transfer roller is in a range of 200 gram force per inch (gf/inch)≦PFT≦500 gram force per inch (gf/inch), respectively, when the peeling forces are measured.
    Type: Grant
    Filed: September 21, 2000
    Date of Patent: May 7, 2002
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won-hyung Lee, Kyu-cheol Shin, Hyung-jin Ahn
  • Publication number: 20010026712
    Abstract: A liquid electrophotographic color image forming apparatus includes a main charger for charging a surface of a photoreceptor web to a predetermined charging electric potential, an optical scanning unit for scanning light onto the photoreceptor web to form an electrostatic latent image, and developing rollers for yellow, cyan, magenta and black colors, sequentially installed in a direction that the photoreceptor web circulates, for developing the electrostatic latent image using developer for each color. Further included are auxiliary chargers for cyan, magenta and black colors, installed downstream of each of the developing rollers, for additionally charging the photoreceptor web, the electric potential of which is lowered after development for each of yellow, cyan and magenta colors.
    Type: Application
    Filed: January 29, 2001
    Publication date: October 4, 2001
    Inventors: In-Yong Song, Kyu-Cheol Shin
  • Patent number: 6289184
    Abstract: An apparatus for measuring the concentration of developer in a liquid printer, the apparatus includes a housing, a developer film forming device installed in the housing for forming a developer film, and a sensing device including a light source unit for emitting colored light corresponding to a range of wavelengths for which the light transmissivity is relatively low to a developer film of a selected color developer, and a photodetector installed corresponding to the light source unit and receiving the light emitted by the light source unit and transmitted through the developer film. Thus, a thin developer film is formed and the concentration of developer is measured by emitting light in a range of wavelengths for which the selected color developer has a relatively low light transmissivity to the developer film. The affect by the toner mixed with other color is relatively less and the concentration of developer can be measured close to the actual concentration although the developer is contaminated.
    Type: Grant
    Filed: May 23, 2000
    Date of Patent: September 11, 2001
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-baek Yoo, Kyu-cheol Shin, Hee-guk Kwak