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: 20060244888
    Abstract: A liquid crystal display device includes a pair of substrates with a liquid crystal layer therebetween, a plurality of scanning signal lines and a plurality of video signal lines formed on one of said pair of substrates, a plurality of first electrodes on the one of said pair of substrates and a plurality of second electrodes on the one of said pair of substrates to drive the liquid crystal by a voltage difference with respect to the first electrode. The first electrodes have a bent form, and the second electrodes have a rectangular form.
    Type: Application
    Filed: June 15, 2006
    Publication date: November 2, 2006
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yonai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Publication number: 20060215094
    Abstract: A liquid crystal display apparatus includes a pair of substrates, a liquid crystal layer arranged therebetween, a plurality of electrodes formed on one substrate for applying an electric field substantially in parallel to a face of the substrate, a plurality of active elements connected to the electrodes, and an alignment control layer formed on a face of at least one of the substrates and being in contact with said liquid crystal layer. A surface of the alignment control layer which is in contact with the liquid crystal layer has stepped difference portions, and a ratio a/d between a height of a maximum one of the stepped difference portions and a maximum thickness d of said liquid crystal layer has a range of 0.02-1. The alignment control film is made from a polyamic acid obtained by reacting a diamine with an acid anhydride of 1,2,3,4-cycle butane-tetracarboxylic acid dianhydrides.
    Type: Application
    Filed: May 31, 2006
    Publication date: September 28, 2006
    Inventors: Katsumi Kondo, Yasushi Tomioka, Takao Miwa, Makoto Yoneya
  • Patent number: 7112355
    Abstract: An active matrix type liquid crystal display apparatus having a pair of substrates, a liquid crystal layer between the substrates, an orientation film a scanning signal electrode, an image signal electrode, a pixel electrode and an active device. Each of the electrodes is arranged so as to apply an electric field, mainly parallel to the substrates. At least one of the electrodes is disposed between at least two dielectric layers disposed above and below the at least one of the electrodes. The resistivity of the liquid crystal layer is set at a value sufficient to substantially prevent disturbance of the orientation of the liquid crystal layer due to static electricity.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: September 26, 2006
    Assignee: Hitachi Ltd.
    Inventors: Masahito Ohe, Katsumi Kondo, Masuyuki Ota
  • Patent number: 7095470
    Abstract: A liquid crystal display device includes a pair of substrates with a liquid crystal layer therebetween, scanning signal lines and video signal lines formed on one of the substrates, first electrodes provided on the one substrate, second electrodes provided on the one substrate to drive the liquid crystal layer by a voltage difference with respect to the first electrode, and an orientation film formed on a nearest surface to the liquid crystal layer on each of the substrates and having an initial orientation direction. At least two first electrodes and at least one second electrode are provided in each pixel with the first electrode and the second electrode having portions substantially in parallel. The at least two first electrode are connected by connecting portion in each pixel.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: August 22, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Patent number: 7088412
    Abstract: A liquid crystal display apparatus include a pair of substrates, a liquid crystal layer arranged between the pair of substrates; a plurality of electrodes formed on one substrate, and an alignment control layer formed on a face of at least one of the pair of substrates and being in contact with the liquid crystal layer. An optical characteristic is charged in response to a molecular alignment condition of the liquid crystal layer, and the thickness of the liquid crystal layer is set to a substantially constant thickness by spacers. A surface of the alignment control layer on the at least one of the pair of substrates which is in contact with the liquid crystal layer has stepped difference portions and on a surface formed in a display pixel, an inclination degree of a stepped difference portion in said alignment control layer is less than 1.
    Type: Grant
    Filed: January 3, 2003
    Date of Patent: August 8, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Katsumi Kondo, Yasushi Tomioka, Takao Miwa, Makoto Yoneya
  • Patent number: 7088414
    Abstract: A liquid crystal display device includes a pair of substrates sandwiching of a liquid crystal layer, plural scanning signal lines and plural video signal lines formed on one of the pair of substrates, and plural pixel regions formed as an area surrounded by an adjacent two of the plural scanning signal lines and an adjacent two of the plural video signal lines. At least a pixel electrode is formed on the one of the pair of substrates in each of the pixel regions, a plurality of counter electrodes is formed on one of the pair of substrates in each of the pixel regions, and at least a counter voltage signal line connects the counter electrodes formed on one of the pair of substrates. The counter voltage signal line is arranged in an overlapping relation with at least one of the scanning signal lines in plan view.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: August 8, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Patent number: 7079212
    Abstract: A liquid crystal display device includes a pair of substrates sandwiching a liquid crystal layer, scanning signal lines and video signal lines formed on one substrate, plural pixel electrodes on the one substrate, and at least a counter electrode on the one substrate to drive the liquid crystal layer by a voltage difference with respect to the pixel electrode. An orientation film formed on a nearest surface to the liquid crystal layer on substrate has an initial orientation direction. At least one of the pixel electrode and the counter electrode has a first region and a second region, and an angle formed by the first region and the initial orientation direction is substantially same in absolute value and reverse in polarity to an angle formed by the second region and the initial orientation direction. A length of the first region and the second region are substantially equal.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: July 18, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Publication number: 20060125765
    Abstract: A display method can achieve both a substantially high definition image display and high speed dynamic image display. The image displaying method of an image displaying apparatus having a display portion consisting of a plurality of pixels takes each of a predetermined number of pixels as one block unit and forms one screen image for display by combining a region for displaying the same information on a plurality of pixels in 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: February 13, 2006
    Publication date: June 15, 2006
    Inventors: Ikuo Hiyama, Shinichi Komura, Tsunenori Yamamoto, Tetsuya Aoyama, Hideo Sato, Makoto Tsumura, Katsumi Kondo, Yuka Utsumi
  • Publication number: 20060125978
    Abstract: A liquid crystal display device includes an illumination device, a light control element arranged at a projected light side of the illumination device, a reflective polarizer arranged at an upper portion of the light control element so that the transmission axis of polarized light is adjusted, a liquid crystal display element for controlling polarization of projected light projected from the reflective polarizer, and a screen arranged at an upper portion of the liquid crystal display element. The light control element includes an isotropic medium without birefringence.
    Type: Application
    Filed: February 3, 2006
    Publication date: June 15, 2006
    Inventors: Ikuo Hiyama, Makoto Tsumura, Masaya Adachi, Katsumi Kondo, Jun-ichi Hirakata, Yuji Mori
  • Patent number: 7061456
    Abstract: A display method can achieve both a substantially high definition image display and high speed dynamic image display. The image displaying method of an image displaying apparatus having a display portion consisting of a plurality of pixels takes each of a predetermined number of pixels as one block unit and forms one screen image for display by combining a region for displaying the same information on a plurality of pixels in 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: Grant
    Filed: April 10, 2001
    Date of Patent: June 13, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Ikuo Hiyama, Shinichi Komura, Tsunenori Yamamoto, Tetsuya Aoyama, Hideo Sato, Makato Tsumura, Katsumi Kondo, Yuka Utsumi
  • Patent number: 7046325
    Abstract: An active matrix liquid crystal display device having a pair of substrates, a liquid crystal layer, scanning lines and video signal lines provided in a matrix manner, at least one pixel electrode and at least one common electrode. The pixel electrode is bent so as to be inclined in first and second directions which are symmetrical relative to the alignment direction of the liquid crystal. The first direction of the pixel electrode is at a plus predetermined angle relative to the alignment direction, while the second direction of the pixel electrode is at a minus predetermined angle relative to the alignment direction.
    Type: Grant
    Filed: August 11, 2003
    Date of Patent: May 16, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Patent number: 7046324
    Abstract: An active matrix liquid crystal display device having a pair of substrates, a liquid crystal layer, scanning lines and video signal lines provided in a matrix manner, at least one pixel electrode and at least one common electrode. The at least one pixel electrode is bent so as to be inclined in first and second directions which are symmetrical relative to the alignment direction of the liquid crystal. The first direction of the pixel electrode is at a plus predetermined angle relative to the alignment direction, while the second direction of the pixel electrode is at a minus predetermined angle relative to the alignment direction.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: May 16, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Publication number: 20060092634
    Abstract: A thin light source unit employs a plurality of light emitting diode chips in multiple colors to generate highly uniform white light at a low cost and with a high light utilization efficiency. The light source unit has light emitting diode chips, lead frames, and a transparent sealer. A plurality of the light emitting diode chips in the same color are connected in series to three or more sets of the lead frames. The light emitting diode chips in at least three different colors are integrally sealed with the transparent sealer. An illuminating apparatus using the light source units, and a display apparatus using the illuminating apparatus are also provided.
    Type: Application
    Filed: November 3, 2005
    Publication date: May 4, 2006
    Inventors: Ikuo Hiyama, Hiroki Kaneko, Toshiaki Tanaka, Tsunenori Yamamoto, Akitoyo Konno, Katsumi Kondo, Haruo Akahoshi
  • Publication number: 20060087482
    Abstract: A liquid crystal display apparatus includes a liquid crystal panel including a pair of polarizers, and a back light provided at a back side of said liquid crystal panel. The liquid crystal panel is an active matrix type liquid crystal panel enabling display and has a characteristic of spectral transmittance required to satisfy the following equation, x>y, when a drive voltage is applied thereto so as to vary from a dark state to a light state, in which “x” is a value of the transmittance in the liquid crystal panel at a wavelength which corresponds to one of 490 nm and 500 nm, and “y” is a value of the transmittance in the liquid crystal panel at a wavelength which corresponds to 545 nm.
    Type: Application
    Filed: December 13, 2005
    Publication date: April 27, 2006
    Inventors: Yuka Utsumi, Katsumi Kondo, Ikuo Hiyama, Osamu Itoh, Masahito Ohe, Kazuhiko Yanagawa, Keiichiro Ashizawa
  • Patent number: 7019799
    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, and a band-pass filter. The first polarizer plate is arranged between the liquid crystal and the light source, and the second polarizer plate is arranged between the liquid crystal and the viewer. The band-pass filter absorbs a component of the light, in which a wave-length of the component of the light is no more than 440 nm, and the band-pass filter is arranged between the light source and the viewer.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: March 28, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Yuka Utsumi, Ikuo Hiyama, Shinichi Komura, Katsumi Kondo
  • Publication number: 20060061719
    Abstract: A liquid crystal display is provided which is capable of reducing the occurrence of defective display due to variations in the initial alignment direction of a liquid crystal alignment control film in a liquid crystal display of an IPS scheme, realizing the stable liquid crystal alignment, providing excellent mass productivity, and having high image quality with a higher contrast ratio. The liquid crystal display has a liquid crystal layer disposed between a pair of substrates, at least one of the substrates being transparent, and an alignment control film formed between the liquid crystal layer and the substrate. At least one of the alignment control films comprises photoreactive polyimide and/or polyamic acid provided with an alignment control ability by irradiation of substantially linearly polarized light.
    Type: Application
    Filed: December 8, 2003
    Publication date: March 23, 2006
    Inventors: Yasushi Tomioka, Hidetoshi Abe, Katsumi Kondo
  • Patent number: 7006173
    Abstract: In order to realize liquid crystal display devices having a wide viewing angle and reduce the absorption loss by polarizers and color filters, and arrangement of reflective color selective means, reflective polarizing selective means, a light control element, and others are specified.
    Type: Grant
    Filed: March 17, 1999
    Date of Patent: February 28, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Ikuo Hiyama, Makoto Tsumura, Masaya Adachi, Katsumi Kondo, Jun-ichi Hirakata, Yuji Mori
  • Publication number: 20060007108
    Abstract: A liquid crystal display apparatus having first white color light sources and blue and/or red second coloring light sources disposed on a back side of a liquid crystal panel, and an image quality processing calculation circuit for detecting a brightness of input image signals, in accordance with a detection result, controlling intensities of the first white color light sources and/or second coloring light sources and correcting pixel signals to be supplied to the liquid crystal panel.
    Type: Application
    Filed: June 21, 2005
    Publication date: January 12, 2006
    Inventors: Yuka Utsumi, Yasushi Tomioka, Akitoyo Konno, Katsumi Kondo
  • Patent number: 6980273
    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: Grant
    Filed: September 6, 2002
    Date of Patent: December 27, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ota, Genshiro Kawachi, Masaaki Kitajima, Tohru Sasaki, Masahito Oh-e, Katsumi Kondo, Makoto Tsumura
  • Patent number: 6958799
    Abstract: A liquid crystal display includes a pair of substrates having a first substrate and a second substrate, at least one of the first and second substrate being transparent, a liquid crystal layer and a color filter layer both provided between the pair of substrates, a plurality of thin film transistors provided on the first substrate and connected to an image signal wiring and a scanning signal wiring, a common electrode and a pixel electrode connected to the thin film transistors and placed opposite to the common electrode in a pixel region. The common electrode and the pixel electrode are placed in different layers through an interlaminar insulating film in the formed of at least two layers including the color filter layer and an orientation direction of liquid crystal molecules of the liquid crystal layer is controlled by a voltage applied at least through the interlaminar insulating film.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: October 25, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Yasushi Tomioka, Yoshiyuki Umeda, Katsumi Kondo