Patents by Inventor Gihwan Ahn

Gihwan Ahn 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: 10752030
    Abstract: A printer and a printing method are proposed. The printer and the printing method include transferring printing paper until a cutting target marker first disposed after a location at which the printing of a unit output has been completed based on the transfer direction of the printing paper reaches a cutting position, and cutting the corresponding location when the printing paper is transferred until the cutting target marker reaches the cutting position.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: August 25, 2020
    Assignee: BIXOLON CO., LTD.
    Inventors: Junho Hwang, Gihwan Ahn
  • Publication number: 20200236242
    Abstract: A printing apparatus supporting USB type-C includes: a USB type-C interface configured to support a connection with an external device; a printing unit configured to perform printing; and a controller configured to control the supply of power to the external device. The controller checks a reception power received from an external power source, predicts the estimated power consumption of at least one of the printing apparatus and the external device, determines a supply power to be transmitted to the external device based on the reception power and the estimated power consumption, and transmits the supply power to the external device via the USB type-C interface.
    Type: Application
    Filed: April 3, 2020
    Publication date: July 23, 2020
    Applicant: BIXOLON CO., LTD.
    Inventors: Young Hwan KWAK, Dong Woo KIM, Junho HWANG, Gihwan AHN
  • Publication number: 20190248162
    Abstract: A printer and a printing method are proposed. The printer and the printing method include transferring printing paper until a cutting target marker first disposed after a location at which the printing of a unit output has been completed based on the transfer direction of the printing paper reaches a cutting position, and cutting the corresponding location when the printing paper is transferred until the cutting target marker reaches the cutting position.
    Type: Application
    Filed: April 19, 2019
    Publication date: August 15, 2019
    Inventors: Junho HWANG, Gihwan AHN
  • Patent number: 7753544
    Abstract: A light control plate 30A of the present invention is disposed in front of a surface light source 20 that emits, in a predetermined direction, parallel light Fi having a substantially uniform luminance distribution. The light control plate 30A has a light incidence surface 30a, at which there are provided optical path control sections 31A of concave and/or convex cross-sectional shape, and a planar light exit surface 30b. The surface of the optical path control sections 31A comprises first to M-th planar portions 32A1 to 32AM. The inclination angles ?1 to ?M and pitch ratios L1 to LM of each planer portion are specified in such a manner that the parallel light Fi can be spread within an exit angle range ??max to ?max relative to the predetermined direction, to exit as light having a substantially uniform luminance angular distribution within the exit angle range.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: July 13, 2010
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hirofumi Ohta, Gihwan Ahn, Byoungin Kim
  • Publication number: 20090161346
    Abstract: The present invention provides a surface light source device capable of emitting light with high uniformity in luminance.
    Type: Application
    Filed: December 22, 2008
    Publication date: June 25, 2009
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Gihwan AHN, Akiyoshi Kanemitsu
  • Publication number: 20090109657
    Abstract: A light control plate, a surface light source device, and a transmission type image display apparatus which can emit light widened within a predetermined angle range are provided. In a light control plate 40, a plurality of light components from respective light sources incident on a main face 40a are emitted from an exit surface 40b. A corresponding area 41 for a space between two light sources adjacent to each other in the main face of the light control plate 40 has first to third regions 41A to 41C. The first and third regions have a plurality of first light path control parts 42 for widening first incident light F1i (F2i) within a predetermined angle range and emitting thus widened light from the exit surface by utilizing refraction of the first incident light on a plurality of planar parts 41k,m.
    Type: Application
    Filed: October 22, 2008
    Publication date: April 30, 2009
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Hirofumi Ohta, Gihwan Ahn
  • Publication number: 20090003001
    Abstract: An optical path deflecting plate of the present invention, which is disposed separated from a plurality of light sources, comprises a main surface on which light from the light sources is incident, and a planar exit surface from which there exits the incident light from the light sources. The main surface comprises a plurality of prisms provided in each region of the main surface that corresponds to a region between two adjacent light sources. First prisms, among the plurality of prisms, are disposed in first and third regions of respective regions, while second prisms are disposed in a second region. The first prisms change the orientation of light from the closer light source, among the two light sources, into the direction of the normal line of the exit surface, through refraction upon incidence on the first prisms, and change the orientation of light from the farther light source, among the two light sources, into the normal line direction, through total reflection in the prisms.
    Type: Application
    Filed: June 17, 2008
    Publication date: January 1, 2009
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Hirofumi Ohta, Gihwan Ahn
  • Publication number: 20090003017
    Abstract: A light control plate 30A of the present invention is disposed in front of a surface light source 20 that emits, in a predetermined direction, parallel light Fi having a substantially uniform luminance distribution. The light control plate 30A has a light incidence surface 30a, at which there are provided optical path control sections 31A of concave and/or convex cross-sectional shape, and a planar light exit surface 30b. The surface of the optical path control sections 31A comprises first to M-th planar portions 32A1 to 32AM. The inclination angles ?1 to ?M and pitch ratios L1 to LM of each planer portion are specified in such a manner that the parallel light Fi can be spread within an exit angle range ??max to ?max relative to the predetermined direction, to exit as light having a substantially uniform luminance angular distribution within the exit angle range.
    Type: Application
    Filed: June 26, 2008
    Publication date: January 1, 2009
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Hirofumi OHTA, Gihwan Ahn, Byoungin Kim
  • Publication number: 20080123018
    Abstract: The present invention provides a light diffuser plate capable of emitting light with high uniformity in luminance. A light diffuser plate 3 of the present invention has a relief structure section 4 consisting of a plurality of triangular ridges having a triangular cross section disposed on at least one side thereof, wherein the relief structure section 4 comprises first triangular ridges 6 of an isosceles triangular shape having a vertex angle ? of 50 to 70 degrees and second triangular ridges 8 of an isosceles triangular shape having a vertex angle ? of 110 to 130 degrees.
    Type: Application
    Filed: November 14, 2007
    Publication date: May 29, 2008
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Gihwan AHN, Akiyoshi Kanemitsu