Patents by Inventor Dae-Ho Choo

Dae-Ho Choo 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).

  • Publication number: 20050041243
    Abstract: The glass substrate test apparatus of the liquid crystal cell process comprises a laser unit for generating a laser beam, a beam slitter and parallel beam slitter for slitting the laser beam emitted from the laser unit so as to have an elongated cross section and parallelizing the slit laser beam, a photo detector for detecting an intensity of double refraction of the slit laser beam transmitted over the whole glass substrate, a phase defector for measuring the laser double refraction detected by the photo detector and comparing the measured double refraction with a standard laser double refraction, and a polarizer arranged between the laser unit and the beam slitter or between the beam slitter and the parallel beam slitter for polarizing the laser beam to a parallel ray.
    Type: Application
    Filed: April 22, 2002
    Publication date: February 24, 2005
    Inventors: Dae-Ho Choo, Min-Young Won, Hyoo-Hak Nam, Beak-Keun Jeon
  • Patent number: 6848488
    Abstract: The apparatus of attaching a polarizing plate includes a base body, a first cutting out module, a first protection sheet strip module and a first polarizing plate attaching module. The first cutting out module cuts out a first polarizing plate from a first mother polarizing plate. The first cutting out module is disposed on the base body. The first protection sheet strip module strips a first protection sheet from the first polarizing plate. The first polarizing plate is stripped off the first protection sheet to be a first stripped polarizing plate. The first protection sheet strip module is disposed on the base body. The first polarizing plate attaching module attaches the first stripped polarizing plate to a first face of a liquid crystal display unit cell of an assembled substrate. The first polarizing plate attaching module is disposed on the base body.
    Type: Grant
    Filed: October 22, 2003
    Date of Patent: February 1, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dae-Ho Choo, Chun-Bok Park, Seung-Hee Her
  • Publication number: 20050011861
    Abstract: In a method of manufacturing an LCD device, an atomic beam is irradiated onto a thin film including a carbon-carbon double bond to form a polarized functional group by transforming the carbon-carbon double bond into a carbon-carbon single bond and a radical state. Then, a polarity preserving material is combined with the polarized functional group so as to preserve a polarity of the polarized functional group. According to the present invention, the alignment film is formed on the thin film transistor unit cell and on the color filter unit cell by a non-contact method. Therefore, time of forming the alignment film is reduced and alignment of the liquid crystal molecules is improved.
    Type: Application
    Filed: October 22, 2003
    Publication date: January 20, 2005
    Inventors: Dae-Ho Choo, Hak-Jin Kim, Bong-Woo Lee
  • Publication number: 20040262273
    Abstract: A method and apparatus for multiple-cutting a substrate into a plurality of pieces with a single irradiation of a laser beam are disclosed. At least two light reflectivity/transmittance control plates are placed on a path through which the light passes such that light reflectivity/transmittance is varied depending on an angle between the generated light and the plates. Plural surface portions of the substrate are heated simultaneously and are then cooled by a sprayed coolant so that the substrate is cut into a plurality of pieces simultaneously. Resultantly, a cutting time is substantially shortened and the productivity is enhanced.
    Type: Application
    Filed: July 15, 2004
    Publication date: December 30, 2004
    Inventors: Hyung-Woo Nam, Dae-Ho Choo, Baek-Kyun Jeon
  • Publication number: 20040233380
    Abstract: Disclosed is an in-line system and a method for manufacturing a liquid crystal display. The system includes a spacer-dispersing unit for dispersing spacers on one of two substrates of a mother glass, the mother glass having at least one liquid crystal cell; a sealant-applying unit for depositing a sealant on one of the two substrates; a liquid crystal depositing unit for depositing liquid crystal material on the substrate on which the sealant is deposited; and a substrate-attaching unit for receiving the two substrates from the sealant-applying unit or the liquid crystal depositing unit, then conjoining the substrates in a vacuum state.
    Type: Application
    Filed: June 29, 2004
    Publication date: November 25, 2004
    Inventors: Dae-Ho Choo, Sang-Uk Jung
  • Patent number: 6822725
    Abstract: Disclosed is a liquid crystal display panel capable of being cut by a laser light. The liquid crystal display panel according to the present invention includes a substrate having a buffer layer between a conducting layer and an inner surface of the substrate, in which the buffer layer is disposed along a cutting line and spreads a crack and edges of the conducting layer is positioned in a region defined by the cutting line. Further, a method for manufacturing the liquid crystal display panel is disclosed, in which the liquid crystal display panel is machined by a laser cutter and a laser grinder.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: November 23, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dae-ho Choo, Byeong-ill Kim, Sung-uk Jung, Woo-shik Lee, Bum-soo Kim
  • Publication number: 20040201806
    Abstract: According to the method of forming a multi-domain for aligning liquid crystal, an alignment film is formed on a substrate. The alignment film is scanned with an atomic beam irradiated in a first direction to form a first domain in a first region of the first alignment film. Then, the alignment film is scanned with the atomic beam irradiated in a second direction to form a second domain in a second region of the first alignment film. Thus, the multi-domain is formed by non-contacting method, so that a number of process and a time used for manufacturing the multi-domain are reduced.
    Type: Application
    Filed: October 7, 2003
    Publication date: October 14, 2004
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Dae-Ho Choo, Hak-Jin Kim, Hong-Gyun Kim, Hwan-Kyeong Jeong, Bong-Woo Lee
  • Publication number: 20040150766
    Abstract: An in-line system for fabricating a liquid crystal display-includes a sealer coating unit for coating a sealer onto a first substrate with a plurality of liquid crystal display cell regions, a liquid crystal injection unit for dropping a liquid crystal onto the first substrate coated with the sealer, and an assembly unit for assembling the first substrate with the second substrate. A sealer hardening unit hardens the sealer interposed between the first and the second substrate to thereby assemble the first and the second substrate with each other. A substrate cutting unit cuts the first and the second substrates along cutting lines through illuminating a laser beam along the cutting lines such that the first and the second substrates are severed into the liquid crystal display cell regions.
    Type: Application
    Filed: January 22, 2004
    Publication date: August 5, 2004
    Inventors: Dae-Ho Choo, Sang-Jun Lee, Yong-Joon Kwon
  • Patent number: 6770842
    Abstract: A method and apparatus for multiple-cutting a substrate into a plurality of pieces with a single irradiation of a laser beam are disclosed. At least two light reflectivity/transmittance control plates are placed on a path through which the light passes such that light reflectivity/transmittance is varied depending on an angle between the generated light and the plates. Plural surface portions of the substrate are heated simultaneously and are then cooled by a sprayed coolant so that the substrate is cut into a plurality of pieces simultaneously. Resultantly, a cutting time is substantially shortened and the productivity is enhanced.
    Type: Grant
    Filed: June 21, 2002
    Date of Patent: August 3, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyung-Woo Nam, Dae-Ho Choo, Baek-Kyun Jeon
  • Publication number: 20040110317
    Abstract: A method of manufacturing a liquid crystal display is provided, which includes: forming a sealant on a first panel; dropping liquid crystal on the first panel to form a plurality of liquid crystal dots; assembling a second panel with the first panel, wherein the first and the second panels have a striped array of pixel areas, each stripe extending in a first direction, and a first distance in the first direction between the liquid crystal dots is equal to or smaller than a second distance in a second direction perpendicular to the first direction between the liquid crystal dots.
    Type: Application
    Filed: December 4, 2003
    Publication date: June 10, 2004
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Dae-Ho Choo, Suk Ki
  • Publication number: 20040108075
    Abstract: The apparatus of attaching a polarizing plate includes a base body, a first cutting out module, a first protection sheet strip module and a first polarizing plate attaching module. The first cutting out module cuts out a first polarizing plate from a first mother polarizing plate. The first cutting out module is disposed on the base body. The first protection sheet strip module strips a first protection sheet from the first polarizing plate. The first polarizing plate is stripped off the first protection sheet to be a first stripped polarizing plate. The first protection sheet strip module is disposed on the base body. The first polarizing plate attaching module attaches the first stripped polarizing plate to a first face of a liquid crystal display unit cell of an assembled substrate. The first polarizing plate attaching module is disposed on the base body.
    Type: Application
    Filed: October 22, 2003
    Publication date: June 10, 2004
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Dae-Ho Choo, Chun-Bok Park, Seung-Hee Her
  • Publication number: 20040100612
    Abstract: In a method of manufacturing an LCD device, TFT unit cells are formed on a first mother substrate, and color filter unit cells are formed on a second mother substrate. A liquid crystal alignment film is formed on the TFT unit cells and on the color filter unit cells. The first mother substrate and the second mother substrate are assembled to form an assembled substrate and liquid crystal is disposed between the TFT unit cell and the color filter unit cell. An LCD unit cell is inspected by applying a test driving signal via non-contact method. The LCD unit cell is separated from the assembled substrate to form an LCD panel. A driving module and the LCD panel are assembled to be formed an LCD assembly.
    Type: Application
    Filed: October 22, 2003
    Publication date: May 27, 2004
    Inventors: Dae-Ho Choo, Dong-Uk Choi, Sang-Kyu Cho
  • Publication number: 20040100609
    Abstract: Disclosed is an in-line system and a method for manufacturing a liquid crystal display. The system includes a spacer-dispersing unit for dispersing spacers on one of two substrates of a mother glass, the mother glass having at least one liquid crystal cell; a sealant-applying unit for depositing a sealant on one of the two substrates; a liquid crystal depositing unit for depositing liquid crystal material on the substrate on which the sealant is deposited; and a substrate-attaching unit for receiving the two substrates from the sealant-applying unit or the liquid crystal depositing unit, then conjoining the substrates in a vacuum state.
    Type: Application
    Filed: June 24, 2003
    Publication date: May 27, 2004
    Inventors: Dae-Ho Choo, Sang-Uk Jung
  • Publication number: 20040092617
    Abstract: In a method and apparatus of aligning liquid crystal, a first ion beam is formed. The first ion beam is transformed into a second ion beam having transformed cross-section. The second ion beam advances toward a thin film including carbon-carbon double bond. The second ion beam forms a first angle with respect to the thin film. The second ion beam is transformed into an atomic beam. The atomic beam is irradiated onto the thin film to break the carbon-carbon double bond. The carbon-carbon double bond is broken to form a polarized functional group for aligning a liquid crystal molecule.
    Type: Application
    Filed: October 14, 2003
    Publication date: May 13, 2004
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Dae-Ho Choo, Hwan-Kyeong Jeong, Bong-Woo Lee
  • Publication number: 20040090586
    Abstract: In a backlight assembly, an assembled substrate on which a spacer including a light-curable material is formed is disposed on a base body and a light supply unit disposed on the base body provides a light to the assembled substrate so as to cure the spacer. An exposure mask formed with an opening is positioned at a path through which the light is supplied so as to selectively supply the light to the spacer of the assembled substrate.
    Type: Application
    Filed: June 5, 2003
    Publication date: May 13, 2004
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Dae-Ho Choo, Dong-Won Lee, Gyo-Seung Ku
  • Patent number: 6723952
    Abstract: The present invention disclose a laser cutter for cutting an object being cut such as a two glasses-attached panel for LCD using a laser beam. The laser cutter includes a laser unit for irradiating a laser beam with a specific wavelength along a marked cutting line of the object, a pre-scriber for forming a pre-cut groove at starting edge of the marked cutting line, and a cooling unit for cooling the cutting line which said laser beam has been irradiated.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: April 20, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dae-ho Choo, Byeong-ill Kim, Sung-uk Jung, Woo-shik Lee, Bum-soo Kim
  • Patent number: 6713720
    Abstract: Disclosed is a method for cutting a non-metallic substrate. A designated cutting line formed on the non-metallic substrate is cut using a thermal stress generated by rapidly heating and cooling the designated cutting line. Further, a shape and an arrangement, etc., of an energy source is optimized, thereby maximizing a cutting speed of the non-metallic substrate and also precisely cutting the non-metallic substrate.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: March 30, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Baek-Kyun Jeon, Dae-Ho Choo, Hyung-Woo Nam, Yong-Joon Kwon
  • Publication number: 20040056008
    Abstract: A method and an apparatus for cutting a non-metallic substrate by a laser are disclosed. In the disclosed method and apparatus, a first laser beam for breaking molecular bonds of the non-metallic substrate material is scanned on a cutting path formed on the non-metallic substrate to form a scribe line having a crack in desired depth. Then, a second laser beam is scanned along a scanning path of the first laser beam to propagate the crack in a depth direction of the substrate and to completely separate the non-metallic substrate. Since the cutting speed can be controlled by the speed of the first laser beam, the cutting speed can be increased and the cutting speed can be easily controlled as compared with the conventional cutting method using the temperature difference due to the heating operation and the cooling operation.
    Type: Application
    Filed: September 23, 2003
    Publication date: March 25, 2004
    Inventors: Dae-Ho Choo, Baek-Kyun Jeon, Hyung-Woo Nam
  • Patent number: 6710843
    Abstract: An in-line system for fabricating a liquid crystal display includes a sealer coating unit for coating a sealer onto a first substrate with a plurality of liquid crystal display cell regions, a liquid crystal injection unit for dropping a liquid crystal onto the first substrate coated with the sealer, and an assembly unit for assembling the first substrate with the second substrate. A sealer hardening unit hardens the sealer interposed between the first and the second substrate to thereby assemble the first and the second substrate with each other. A substrate cutting unit cuts the first and the second substrates along cutting lines through illuminating a laser beam along the cutting lines such that the first and the second substrates are severed into the liquid crystal display cell regions.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: March 23, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dae-Ho Choo, Sang-Jun Lee, Yong-Joon Kwon
  • Publication number: 20040012755
    Abstract: Disclosed is an in-line system and a method for manufacturing a liquid crystal display. The system includes a spacer-dispersing unit for dispersing spacers on one of two substrates of a mother glass, the mother glass having at least one liquid crystal cell; a sealant-applying unit for depositing a sealant on one of the two substrates; a liquid crystal depositing unit for depositing liquid crystal material on the substrate on which the sealant is deposited; and a substrate-attaching unit for receiving the two substrates from the sealant-applying unit or the liquid crystal depositing unit, then conjoining the substrates in a vacuum state.
    Type: Application
    Filed: June 24, 2003
    Publication date: January 22, 2004
    Inventors: Dae-Ho Choo, Sang-Uk Jung