Patents by Inventor Tsunenori Yamamoto

Tsunenori Yamamoto 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: 6967637
    Abstract: A liquid crystal display apparatus including: a first substrate; a second substrate arranged opposite the first substrate; and a liquid crystal layer held between the first substrate and the second substrate; further provided with a plurality of scanning lines arranged over the first substrate; signal lines arranged over the first substrate to cross the scanning lines; pixels each composed matching an area surrounded by the scanning lines and the signal lines; pixel electrodes arranged over the first substrate and matching the signal lines; and common electrodes arranged over the first substrate and matching the pixel electrodes, wherein at least either of the first substrate and the second substrate is provided with unevenness to vary the thickness of the liquid crystal layer in the light-transmissive regions of the same ones of the pixels.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: November 22, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Tetsuya Aoyama, Kenji Okishiro, Katsumi Kondou, Tsunenori Yamamoto, Shinichi Komura
  • Publication number: 20050253798
    Abstract: To provide a display device capable of displaying a moving picture with high definition and at high speed. An image display system includes: an image display unit; and a control unit. The control unit has: a block discrimination circuit portion; an image processing portion; a storage portion; and a synchronizing signal generation portion. The block discrimination circuit portion discriminates a moving picture or a still picture to process the image information in accordance with the discriminated result, in which the number of gradations for the image information processed when the discriminated result is the moving picture is lower than when the discriminated result is the still picture. Thereby, the high definition image display and the high speed moving picture display can be effected by reducing the information with lower degree of recognition.
    Type: Application
    Filed: July 25, 2005
    Publication date: November 17, 2005
    Inventors: Ikuo Hiyama, Tsunenori Yamamoto, Akitoyo Konno, Makoto Tsumura, Yoshiyuki Kaneko, Yoshiro Mikami, Tatsuki Inuzuka, Yasutaka Toyoda
  • Publication number: 20050231457
    Abstract: The liquid crystal display apparatus includes a liquid crystal display, a backlight unit for emitting rays of light of three or more colors, the ray of each color being controlled, and applying these rays of light onto the liquid crystal display. A controller is further provided for controlling a change of display data of each color of the liquid crystal display and an emitted light quantity of each color of the backlight unit at a time, based on a video signal being inputted for displaying the corresponding image and an output signal sent from an ambient light sensor for sensing ambient light.
    Type: Application
    Filed: February 9, 2005
    Publication date: October 20, 2005
    Inventors: Tsunenori Yamamoto, Daisuke Kajita, Ikuo Hiyama, Akitoyo Konno, Tatsuki Inuzuka, Masatoshi Wakagi
  • Patent number: 6940481
    Abstract: A liquid crystal display apparatus which is adapted to divide one frame period into a preset writing period, a first writing period, a first holding period, a second writing period, and a second holding period, to be driven in this sequence. The first and second writing periods have reverse writing voltage polarities and the second writing period is set to be about ½ of the first writing period.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: September 6, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Akitoyo Konno, Makoto Tsumura, Tsunenori Yamamoto, Ikuo Hiyama, Yoshinori Aono
  • Publication number: 20050184952
    Abstract: The video display apparatus has a light modulation device for forming a picture in accordance with a video signal and a lighting unit for irradiating, on the light modulation device, illumination light necessary to cause it to display the picture. In the apparatus, the lighting unit irradiates the illumination light in sequence of individual plural illumination light source partitive areas, a luminance distribution calculating unit calculates luminance distributions of video signals corresponding to the plural partitive areas to determine illumination light luminance levels of the individual partitive areas, an illumination controller controls rays of the illumination light of individual areas of the lighting unit on the basis of determination by the luminance distribution calculating unit, and a video corrector corrects the video signal inputted to the light modulation device on the basis of the determination by the luminance distribution calculating unit.
    Type: Application
    Filed: February 9, 2005
    Publication date: August 25, 2005
    Inventors: Akitoyo Konno, Masaya Adachi, Daisuke Kajita, Tsunenori Yamamoto, Katsumi Kondo, Tatsuki Inuzuka, Ikuo Hiyama, Yuka Utsumi
  • Publication number: 20050162584
    Abstract: A liquid crystal display device of the present invention is configured of a liquid crystal display unit for displaying an image, a backlight unit controllable for each color that radiates light at the liquid crystal display unit, a display controller for controlling a display of the liquid crystal display unit, and an emission control circuit for controlling an emission of the each color of the backlight unit, wherein the emission control circuit performs control so that emission start timing and emission end timing in a sequential emission period of the each color of the backlight unit match in all colors.
    Type: Application
    Filed: November 9, 2004
    Publication date: July 28, 2005
    Inventors: Tsunenori Yamamoto, Daisuke Kajita, Ikuo Hiyama
  • Patent number: 6909442
    Abstract: A display device including a plurality of blocks of pixels each of which includes a red subpixel, a green subpixel, and a blue subpixel, each of the blocks including pixels in a form of a matrix having N rows and M columns includes a first active element shared among three subpixels of each pixel and a second active element connected to a second active element formed in each subpixel connected to the first active element. Ma gradation voltage lines (Ma is an integer; M?Ma?2) respectively of red, green, and blue subpixels in a direction of the column are commonly connected. The display device directly displays a compressed image signal without developing the image signal into a bit map in which each subpixel has gradation information.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: June 21, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Ikuo Hiyama, Tsunenori Yamamoto, Akitoyo Konno, Makoto Tsumura
  • Patent number: 6894671
    Abstract: A display apparatus is capable of adapting sufficiently to an increase in the display frequency even when using an optical modulation element which has a fairly low response speed and can rewrite an image at a high speed. The display apparatus separately performs mapping of display data for an optical modulation element of each pixel and application of gradation information. The display apparatus divides a display period of one frame into a plurality of sub-frames, controls the input value for the optical modulation element independently per each sub-frame in the plurality of sub-frames, and displays an image with a gradation display using the optical modulation element.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: May 17, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Tsunenori Yamamoto, Ikuo Hiyama, Shinichi Komura, Tetsuya Aoyama, Hajime Akimoto, Katsuyuki Funahata, Kazuhiro Kuwabara
  • Publication number: 20050093813
    Abstract: An illumination device and display device using it display motion pictures without a blur and make a light utilizing efficiency of a backlight improved. An illumination device having a light pipe of a substantially parallel flat-form sheet, whose one surface is an outgoing light surface and a light source unit is placed at one side and both side edges, is equipped with a light axis of lights after having entered the light pipe from the light source unit being unparallel to the outgoing light surface of the light pipe, and a reflection body unit consisting of plural unit reflection bodies divided into m in a vertical direction of the light source unit at an opposite side surface of the outgoing light surface of the light pipe, wherein the reflection body unit can contact ad separate from the opposite side surface the outgoing light surface of the light pipe for every unit reflection bodies.
    Type: Application
    Filed: October 29, 2003
    Publication date: May 5, 2005
    Inventors: Tsunenori Yamamoto, Ikuo Hiyama, Akitoyo Konno, Osamu Ito
  • Publication number: 20050083470
    Abstract: A liquid crystal display device having first and second substrates with a liquid crystal layer therebetween, a plurality of gate signal lines and a plurality of drain signal lines, a plurality of counter voltage signal lines, a plurality of pixel regions defined by neighboring gate signal lines and drain signal lines, a counter electrode and a pixel electrode enabling formation of an electric field, and an orientation film being formed on the first substrate. The pixel electrode has a plurality of slits overlaps the counter electrode with an insulating layer therebetween. A pair of edges of the counter electrode and pixel electrode extend in parallel to the gate signal line and another pair of edges of the counter electrode and the pixel electrode extend in parallel to the drain line.
    Type: Application
    Filed: December 6, 2004
    Publication date: April 21, 2005
    Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
  • Publication number: 20050083471
    Abstract: A liquid crystal display device having first and second substrates with a liquid crystal layer therebetween, a plurality of gate signal lines and a plurality of drain signal lines, a plurality of pixel regions defined by neighboring gate signal lines and drain signal lines, and a pixel electrode in each pixel region. The drain signal line has a metal layer and another layer formed by a transparent conductor, and the another layer is electrically connected to the metal layer. The pixel electrode is made of a transparent conductor, and a transparent conductor of the pixel electrode and the transparent conductor of the drain signal line are of the same material.
    Type: Application
    Filed: December 6, 2004
    Publication date: April 21, 2005
    Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
  • Patent number: 6882333
    Abstract: A display apparatus which can display a ultra-high definition picture and high-speed animation is provided. The input picture signal is connected by signal generation circuit which supplies a desired signal to X driver according to n-gradation approximation picture signal output from n-gradation approximation calculating circuit to convert into n-gradation approximation picture signal approximated to binary gradation in every block and n-gradation approximation calculating circuit, Y driver, common voltage generating circuit, signal supply circuit and X driver, and a plurality of pixel parts connected by X signal line and Y driver which extends in the Y direction, and provided to the intersection parts of Y signal line which expands in the X direction.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: April 19, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Shinichi Komura, Tetsuya Aoyama, Ikuo Hiyama, Tsunenori Yamamoto, Hiroshi Kageyama, Shinya Ohtsuji
  • Publication number: 20050078261
    Abstract: A liquid crystal display device having first and second substrates with a liquid crystal layer therebetween, a plurality of gate signal lines and a plurality of drain signal lines, a plurality of counter voltage signal lines, a plurality of pixel regions defined by neighboring gate signal lines and drain signal lines. and a counter electrode and a pixel electrode formed on the first substrate in each pixel region so as to enable an electric field to be formed therebetween. The counter electrode is of planar shape and made of a transparent conductor. The counter voltage signal line is made of metal and has a branch in each pixel region with the counter electrode being directly connected to the branch.
    Type: Application
    Filed: December 3, 2004
    Publication date: April 14, 2005
    Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
  • Publication number: 20050078262
    Abstract: A liquid crystal display device having a first transparent insulating substrate, a second transparent insulating substrate, a liquid crystal layer having liquid crystal molecules interposed between the first and second substrates, a plurality of gate bus lines and a plurality of data bus lines formed on the first substrate, wherein an area formed by two gate bus lines intersecting two data bus lines substantially defines a unit pixel. A pixel electrode made from a transparent conductor material is arranged in each unit pixel and has a plurality of upper slits parallelly arranged at a first tilt angle and a plurality of lower slits parallelly arranged at a second tilt angle and the upper slits and the lower slits are arranged in the unit pixel as an mirror image of each other and upper slits not connected to any of the lower slits.
    Type: Application
    Filed: December 6, 2004
    Publication date: April 14, 2005
    Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
  • Publication number: 20050078260
    Abstract: A liquid crystal display device having first and second substrates with a liquid crystal layer therebetween, a plurality of gate signal lines made of metal and a plurality of drain signal lines made of metal, a plurality of counter voltage signal lines, a plurality of pixel regions defined by neighboring gate signal lines and drain signal lines and a pixel electrode formed on first substrate in each pixel region. The pixel electrode and the counter voltage signal lines have an overlapping region, and an edge of the pixel electrode which extends in parallel to the drain signal line shifts to inside of the pixel region at the overlapping region as compared to the edge of the pixel electrode at a non-overlapping region.
    Type: Application
    Filed: December 3, 2004
    Publication date: April 14, 2005
    Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
  • Publication number: 20050068480
    Abstract: In an in-plane switching (ISP) mode controlling transmission and shielding of light by application of lateral electric field to liquid crystal molecules aligned in the direction in parallel to a substrate, increase in luminance or color shift at a black-representation area or upon black-representation condition at an inclined viewing angle is reduced. First and second polarizing plates sandwiching a liquid crystal layer each have a supporting member (plate) on at least either surface thereof. The supporting member on the inside surface of the first polarizing plate on the side of an illumination unit has a retardation in the thickness direction R1·h1 and the supporting member on the inside surface of the second polarizing plate has a retardation in the thickness direction R2·h2. In the O-mode, R1·h1>R2·h2 and in the E-mode, R1·h1<R2·h2.
    Type: Application
    Filed: September 30, 2004
    Publication date: March 31, 2005
    Inventors: Ikuo Hiyama, Shinichi Komura, Tsunenori Yamamoto, Yuka Utsumi, Mutsumi Maehara, Daisuke Kajita
  • Publication number: 20050030461
    Abstract: A liquid crystal display device having first and second substrates with a liquid crystal layer therebetween, a plurality of gate signal lines and a plurality of drain signal lines, a plurality of counter voltage signal lines, a plurality of pixel regions defined by neighboring gate signal lines and drain signal lines and a counter electrode and a pixel electrode being formed on the first substrate in each pixel region and enabling forming of an electric field therebetween. The counter electrode is of planar shape and, the pixel electrode is of planar shape with plurality of slits and is overlapped with the counter electrode with an insulating layer provided therebetween. Both the counter electrode and pixel electrode are made of a transparent conductor. The counter voltage signal line is made of metal and extends in center region in each pixel region and is directly connected to the counter electrode.
    Type: Application
    Filed: September 14, 2004
    Publication date: February 10, 2005
    Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
  • Patent number: 6850219
    Abstract: A display device is constituted by a display module which determines a plurality of pieces of pixels as belonging to one block unit, selects the plurality of pixels in each block unit at the same time and displays a picture image by adding one or a plurality of specific patterns each having different spatial frequencies of each block unit; a display control unit which controls the display module; a picture image signal generation unit which generates picture image signals; and a computing circuit which generates the specific patterns each having different spatial frequencies while weighting the same based on the picture image signals for every block unit. Thereby, a display device which reduces the signal clock frequency as well as increases the signal writing time, enhances the opening rate of an LC panel and permits a highly fine display and a high speed motion picture display, is obtained.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: February 1, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Tetsuya Aoyama, Shinichi Komura, Ikuo Hiyama, Tsunenori Yamamoto, Yoshiyuki Kaneko, Mitsuji Ikeda, Osamu Itou, Hideo Satou, Shoichi Hirota
  • Publication number: 20050012754
    Abstract: A control device, which is capable of suppressing an increase in a load of a data transfer for an increase of an amount of data is provided. The control-device includes a compressed data generation unit for generating a compressed data based on a set-up value inputted, and a controller for outputting a frame rate-information to the compressed data generation unit, and for making compressed data to be outputted from a memory for use in storing a compressed data to an image display device in accordance with the frame rate.
    Type: Application
    Filed: August 12, 2004
    Publication date: January 20, 2005
    Inventors: Tatsuki Inuzuka, Tsunenori Yamamoto, Ikuo Hiyama, Makoto Tsumura, Yasutaka Toyoda
  • Patent number: 6784891
    Abstract: A control device, which is capable of suppressing an increase in a load of a data transfer for an increase of an amount of data is provided. The control device includes a compressed data generation unit for generating a compressed data based on a set-up value inputted, and a controller for outputting a frame rate information to the compressed data generation unit, and for making compressed data to be outputted from a memory for use in storing a compressed data to an image display device in accordance with the frame rate.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: August 31, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Tatsuki Inuzuka, Tsunenori Yamamoto, Ikuo Hiyama, Makoto Tsumura, Yasutaka Toyoda