Patents by Inventor Katsumi Kondo

Katsumi Kondo 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: 20030002002
    Abstract: A liquid crystal display device of low power consumption which exhibits high image quality is realized. To each liquid-crystal-side pixel region of one substrate out of respective substrates which are arranged while sandwiching liquid crystal therebetween, a first switching element and a second switching element which are operated in response to a scanning signal from a gate signal line, a pixel electrode to which a video signal is supplied from the drain signal line through the first switching element, and a counter electrode to which a reference voltage signal is supplied from a reference voltage signal line through the second switching element, and the pixel electrode and the counter electrode are respectively formed of strip-like transparent conductive layers and are substantially alternately arranged in the inside of the pixel region.
    Type: Application
    Filed: June 13, 2002
    Publication date: January 2, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Genshiro Kawachi, Hideo Sato, Toshio Miyazawa, Yoshiro Mikami, Katsumi Kondo
  • Publication number: 20030002005
    Abstract: A normally closed liquid crystal display device using an in-plane switching mode prevented from light leakage caused by spacer beads and having a high contrast ratio can be produced by making a pretilt angle between an alignment control film and liquid crystals 4° or less and controlling a light leakage centering the spacer in 4-divided shapes; or by placing a film provided with a liquid crystal alignment controlling function by irradiation with polarized light between the spacer and a liquid crystal layer, the spacer being present in a pair of substrates.
    Type: Application
    Filed: July 8, 2002
    Publication date: January 2, 2003
    Inventors: Yuka Utsumi, Yasushi Tomioka, Masatoshi Wakagi, Yasunari Maekawa, Sukekazu Aratani, Katsumi Kondo, Shigeru Matsuama
  • Publication number: 20030002001
    Abstract: An active matrix type liquid crystal display apparatus including a driver having an active element, an electrode structure mainly applying an electric field which is substantially parallel to a substrate surface to a liquid crystal layer, and at least a part of a portion of a signal wiring which opposes the liquid crystal layer transmits a video signal to the active element and is covered by a conductive material via an insulator. The conductive material is electrically connected with a common electrode as one of electrodes of the electrode structure.
    Type: Application
    Filed: September 6, 2002
    Publication date: January 2, 2003
    Inventors: Masuyuki Ota, Genshiro Kawachi, Masaaki Kitajima, Tohru Sasaki, Masahito Oh-e, Katsumi Kondo, Makoto Tsumura
  • Publication number: 20020191134
    Abstract: A reflective liquid crystal display apparatus with pixels includes a first electrode substrate, a second electrode substrate and a liquid crystal layer. The first electrode substrate includes a polymer layer having plural protrusions or depressions arranged randomly formed on a glass substrate, and a reflective layer, color filters, transparent electrodes, and an alignment layer formed and laminated sequentially on the polymer layer. The second electrode substrate, includes transparent electrodes and an alignment layer formed and laminated on a glass substrate, and arranged so that the alignment layer faces the alignment layer on the first electrode substrate. The liquid crystal layer is formed by filling a liquid crystal composition into an interval between the first and second electrode substrates. Portions of the reflective layer corresponding to the portions of each pixel other than apertures of each pixel are colored black.
    Type: Application
    Filed: August 16, 2002
    Publication date: December 19, 2002
    Inventors: Katsuyuki Funahata, Shinichi Komura, Kazuhiro Kuwabara, Osamu Itou, Katsumi Kondo, Makoto Yoneya, Makoto Abe
  • Publication number: 20020186340
    Abstract: A liquid crystal display device includes a pair of substrates, and a plurality of pixel electrodes and common electrodes formed on one of the pair of substrates for supplying an electric field to the liquid crystal layer. The liquid crystal display device is configured so that a response time between a lowest brightness level and a highest brightness level is less than 16.7 ms.
    Type: Application
    Filed: July 15, 2002
    Publication date: December 12, 2002
    Inventors: Hiroyuki Kagawa, Shintaro Takeda, Kotaro Araya, Sukekazu Aratani, Katsumi Kondo
  • Patent number: 6483564
    Abstract: A liquid crystal display apparatus having a pair of substrates and a liquid crystal layer interposed between the pair of substrates. One of the pair of substrates has an electrode structure including a plurality of pixel electrodes and a plurality of common electrodes, an organic polymer film is formed on at least one of the pixel electrodes and the common electrodes, and the liquid crystal layer is in direct contact with the organic polymer film.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: November 19, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Sukekazu Aratani, Yoshiyuki Umeda, Yasushi Tomioka, Hisao Yokokura, Katsumi Kondo, Setsuo Kobayashi
  • Patent number: 6476890
    Abstract: A reflective color liquid crystal display apparatus, which can obtain bright images with a contrast in when viewed from any direction, is provided at a low cost. The reflective color liquid crystal display apparatus has an inside reflector and is able to produce bright images with a high contrast because unnecessary reflecting light from non-aperture portions can be decreased, and its aperture ratio can be determined approximately only by intervals of the reflective layer and intervals between the transparent electrodes. This can be accomplished by removing a reflective layer corresponding to black a matrix layer, adding a black matrix function to a polymer layer having protrusions and depressions under the reflective layer, and making a composition of its element so that a black matrix layer is not formed on the reflective layer, but only color filters are formed.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: November 5, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Katsuyuki Funahata, Shinichi Komura, Kazuhiro Kuwabara, Osamu Itou, Katsumi Kondo, Makoto Yoneya, Makoto Abe
  • Publication number: 20020140891
    Abstract: The present invention provides a liquid crystal display of high image quality which can be driven at a low voltage and shows a lowered inhomogeneity of display caused by an after image phenomenon.
    Type: Application
    Filed: August 15, 2001
    Publication date: October 3, 2002
    Inventors: Yasushi Tomioka, Yoshiyuki Umeda, Katsumi Kondo
  • Patent number: 6441880
    Abstract: A normally closed liquid crystal display device using an in-plane switching mode prevented from light leakage caused by spacer beads and having a high contrast ratio can be produced by making a pretilt angle between an alignment control film and liquid crystals 4° or less and controlling a light leakage centering the spacer in 4-divided shapes; or by placing a film provided with a liquid crystal alignment controlling function by irradiation with polarized light between the spacer and a liquid crystal layer, the spacer being present in a pair of substrates.
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: August 27, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Yuka Utsumi, Yasushi Tomioka, Masatoshi Wakagi, Yasunari Maekawa, Sukekazu Aratani, Katsumi Kondo, Shigeru Matsuyama
  • Publication number: 20020109809
    Abstract: A liquid crystal display for displaying an image to be visible for a viewer, has a liquid crystal, a pair of electrodes for controlling an orientation of at least a part of the liquid crystal in accordance with an electric field between the electrodes, a light source for generating a light to be transmitted through the liquid crystal to the viewer, a pair of first and second polarizer plates, the first polarizer plate being arranged between the liquid crystal and the light source, and the second polarizer plate being arranged between the liquid crystal and the viewer, and a band-pass filter for absorbing a component of the light, a wave-length of which component is not more than 440 nm, and the band-pass filter being arranged between the light source and the viewer.
    Type: Application
    Filed: September 20, 2001
    Publication date: August 15, 2002
    Inventors: Yuka Utsumi, Ikuo Hiyama, Shinichi Komura, Katsumi Kondo
  • Patent number: 6423385
    Abstract: Realizing low driving voltage, high contrast, and high response speed in an active matrix type liquid crystal display device of the in-plane switching mode type.
    Type: Grant
    Filed: February 24, 2000
    Date of Patent: July 23, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Hiroyuki Kagawa, Shintaro Takeda, Kotaro Araya, Sukekazu Aratani, Katsumi Kondo
  • Patent number: 6417906
    Abstract: A panel of a liquid crystal display, having a transparent insulating substrate, a gate line which is formed on the substrate, has a double-layered structure including a bottom metal layer and a top indium tin oxide layer, and extends to form a gate pad. A plurality of common electrodes which are formed on the substrate, connected to each other and separated from the gate line. An insulating layer covering the gate line and the common electrodes. A plurality of pixel electrodes which are formed on the insulating layer and are arranged between two of the common electrodes. A data line which is formed on the insulating layer and extends to form a data pad and a switching element having a gate connected to the gate line, a source connected to the data line and a drain connected to the pixel electrode.
    Type: Grant
    Filed: December 12, 2000
    Date of Patent: July 9, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Keiichiro Ashizawa, Yasuyuki Mishima, Kazuhiro Ogawa, Masahito Ohe, Masahiro Yanai, Katsumi Kondo
  • Publication number: 20020067322
    Abstract: A liquid crystal display device can suppress the local temperature elevation of a liquid crystal in the vicinity of drivers. On a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via the switching element, and a reference electrode which generates an electric field between the reference electrode and the pixel electrode are mounted on each pixel region of the liquid-crystal-side surface. The video signals from the drain signal line are generated by a driver chip mounted on one substrate. A light transmittivity of the liquid crystal layer is set to take a minimum value when a voltage is not applied between the pixel electrode and the reference electrode.
    Type: Application
    Filed: September 10, 2001
    Publication date: June 6, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Kazuhiko Yanagawa, Yasushi Iwakabe, Yoshiaki Nakayoshi, Setsuo Kobayashi, Katsumi Kondo, Nagatoshi Kurahashi
  • Publication number: 20020063822
    Abstract: A liquid crystal display device having a pair of substrates with a liquid crystal layer interposed between the pair of substrates. One of the pair of substrates includes a plurality of scanning electrodes, a plurality of signal electrodes arranged so as to cross the plurality of scanning electrodes, a plurality of thin film transistors arranged in the vicinity of crossing points of the scanning electrodes and the signal electrodes, a plurality of common electrodes, and a plurality of pixel electrodes arranged between each of the common electrodes. An electric field is formed in the liquid crystal layer by applying a voltage to the pixel electrodes and the plurality of common electrodes. The other substrate of the pair of substrates includes color filters, an insulating film for flattening the color filters arranged on the color filters, and an orientation control film arranged on the insulating film.
    Type: Application
    Filed: January 17, 2002
    Publication date: May 30, 2002
    Inventors: Katsumi Kondo, Hiromu Terao, Hidetoshi Abe, Masuyuki Ohta, Kenkichi Suzuki, Tohru Sasaki, Genshiro Kawachi, Junichi Ohwada
  • Publication number: 20020054259
    Abstract: A liquid crystal display device includes two electrode substrates and a liquid crystal layer laid between these substrates. One electrode is composed of a glass substrate with a plastics layer having plural convex portions or convex and concave portions randomly formed thereon and a lamination of a reflector, an insulating and flatting layer, a transparent electrode, and alignment layer formed on the plastics layer. The other electrode substrate is composed of a glass substrate and a lamination of a transparent electrode and alignment layer formed on the glass substrate. Both of the electrode substrates are located in a manner to allow the alignment layer of them to be opposed to each other.
    Type: Application
    Filed: January 11, 2002
    Publication date: May 9, 2002
    Inventors: Katsuyuki Funahata, Shinichi Komura, Kazuhiro Kuwabara, Osamu Itou, Katsumi Kondo
  • Publication number: 20020051153
    Abstract: A display method can achieve both of substantially high definition image display and high speed dynamic image display. The image displaying method of an image displaying apparatus having a display portion consisted of a plurality of pixels takes each of a predetermined number of pixels as one block unit and forms one screen image for displaying by combining a region for displaying the same information on a plurality of pixels in the one block unit during one scanning period and a region for permitting display of respectively different information on the plurality of pixels in the one block unit.
    Type: Application
    Filed: April 10, 2001
    Publication date: May 2, 2002
    Inventors: Ikuo Hiyama, Shinichi Komura, Tsunenori Yamamoto, Tetsuya Aoyama, Hideo Sato, Makato Tsumura, Katsumi Kondo, Yuka Utsumi
  • Publication number: 20020045114
    Abstract: In a two-component development system containing a toner and a carrier, an a-Si photosensitive member having a diameter of from 20 mm to 80 mm is used, the photosensitive member is electrostatically charged to have a surface potential of from 300 to 450 V (absolute value), and yellow, magenta, cyan and black toners are used each of which have a weight-average particle diameter of from 4.0 &mgr;m to 10.0 &mgr;m, and, under a condition that the carrier of the two-component developer has a 50% average particle diameter of from 10 &mgr;m to 80 &mgr;m and as image density (D0.5) measured usually after the toner is fixed once when the quantity of unfixed toner on a transfer medium, M/S, is 0.5 mg/cm2, have a coloring power of from 1.0 to 1.9, and in which the difference between a maximum value and a minimum value of D0.5 of yellow, magenta, cyan and black colors is form 0 to 0.5. This makes it possible to obtain high-quality images in a high image density and a superior color reproduction.
    Type: Application
    Filed: July 6, 2001
    Publication date: April 18, 2002
    Inventors: Takaaki Kaya, Takaaki Kotaki, Makoto Kanbayashi, Yushi Mikuriya, Katsumi Kondo, Wakashi Iida
  • Publication number: 20020039162
    Abstract: An active matrix type liquid crystal display apparatus having a pair of substrates, at least one of which is transparent; a liquid crystal layer inserted between the substrates; an orientation film provided between the liquid crystal layer and at least one of the pair of substrates and on an inner side of the at least one substrate; a scanning signal electrode, an image signal electrode, a pixel electrode and an active device, each provided between the liquid crystal layer and the at least one substrate; and a polarization arrangement provided on the outer sides of the substrates, for changing an optical characteristic according to an orientation state of the liquid crystal layer; wherein each of the electrodes is arranged so as to apply an electric field, mainly parallel to the substrates, to the liquid crystal layer, and being connected to an external control for selectively controlling the electric field according to a display pattern.
    Type: Application
    Filed: November 9, 1999
    Publication date: April 4, 2002
    Inventors: MASAHITO OHE, KATSUMI KONDO, MASUYUKI OTA
  • Publication number: 20020037466
    Abstract: A magenta toner containing at least a binder resin and a colorant; the magenta toner having a storage elastic modulus at a temperature of 80° C., G′80, in the range of from 1×106 dN/m2 to 1×108 dN/m2 and a storage elastic modulus at a temperature of from 120° C. to 180° C., G′120-180, in the range of from 2×103 dN/m2 to 1×106 dN/m2, and containing at least a compound selected from the group consisting of compounds represented by the following Formulas (1) and (2) and a compound represented by the following Formula (3).
    Type: Application
    Filed: July 10, 2001
    Publication date: March 28, 2002
    Inventors: Makoto Kanbayashi, Takaaki Kotaki, Katsumi Kondo, Yasuhiro Ichikawa, Takaaki Kaya, Wakashi Iida, Takayuki Itakura
  • Publication number: 20020028632
    Abstract: A polishing compound containing cocoon-shaped silica particles and crystal silica particles, and water-soluble polymers including; at least one type selected from the groups including ammonium nitrate and ammonium acetate, and at least one type selected from methylcellulose, carboxymethylcellulose, hydroxyethylcellulose, and the group including carboxymethylcellulose.
    Type: Application
    Filed: January 25, 2001
    Publication date: March 7, 2002
    Inventors: Hajime Shimamoto, Shoji Ichikawa, Katsumi Kondo, Susumu Abe, Kenji Takenouchi