Patents Assigned to Hitachi Display, Ltd.
  • Patent number: 8378946
    Abstract: A display device includes a plurality of thin-film transistors formed on a substrate on which a display area is formed. The display device also includes a gate electrode, a gate insulating film formed so as to cover the gate electrode, an semiconductor layer in an island shape formed on an upper surface of the gate insulating film so as to superimpose the gate electrode without protruding from the gate electrode when viewed planarly, an insulating film formed so as to cover the semiconductor layer, and a pair of electrodes electrically connected to the semiconductor layer respectively through a pair of through holes that are formed at the insulating film. The semiconductor layer is formed by sequentially laminating a crystalline semiconductor layer and an amorphous semiconductor layer. The pair of electrodes is respectively formed by sequentially laminating a semiconductor layer doped with impurities and a metal layer.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: February 19, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshiaki Toyota, Mieko Matsumura
  • Patent number: 8379163
    Abstract: A display device includes: a first substrate which constitutes a display panel; and a flexible printed circuit board which is connected to the first substrate. The flexible printed circuit board is electrically and mechanically connected with terminals formed on the first substrate. The flexible printed circuit board includes a board portion, a wiring layer which is mounted on the board portion, and a cover portion which covers the wiring layer. The wiring layer includes a connecting portion which is electrically and mechanically connected to a terminal portion formed on the first substrate. The cover portion is removed at the connecting portion, and the cover portion in the vicinity of the connecting portion overlaps with the first substrate. The cover portion in the vicinity of the connecting portion is fixed to the first substrate.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: February 19, 2013
    Assignees: Hitachi Displays, Ltd., Pansonic Liquid Crystal Display Co., Ltd.
    Inventor: Eiji Oohira
  • Patent number: 8378950
    Abstract: The present invention provides a display device which displays a black image by periodically inserting the black image, wherein after the display of the black image, a first period in which a video signal different from a video signal for the black image is outputted to video signal lines is made different from a succeeding period in length.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: February 19, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Kenta Endo, Yoshihiro Imajo, Yoshihisa Ooishi, Ikuko Mori, Shisei Katou
  • Patent number: 8378350
    Abstract: Provided is a display device including first and second gate interconnections; a first pixel circuit disposed at one side of the first gate interconnection, the first pixel circuit including a first transistor, a gate electrode of the first transistor electrically connected to the first gate interconnection, a source electrode of the first transistor formed in a source layer, the source electrode including a first source electrode facing portion overlapping with the gate electrode; and a second pixel circuit disposed at the other side of the second gate interconnection, the second pixel circuit including a second transistor, a gate electrode of the second transistor electrically connected to the second gate interconnection, a source electrode of the second transistor formed in the source layer, the source electrode including a second source electrode facing portion overlapping with the gate electrode and stretched along the first source electrode facing portion.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: February 19, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Ryouhei Suzuki, Yasuyuki Yamada
  • Patent number: 8379168
    Abstract: An object of the present invention is to provide a liquid crystal display device where there are fewer moiré effects between lenticular lenses and the backlight. The present invention provides a liquid crystal display device where the arrangement or form of lenticular lenses 1 varies in waveform so that the center line of the lenses, the width of the lenses, and the height of the lenses vary in the case where light emitted from a backlight 59 is collected into openings 15 for transmitting light by means of lenticular lenses 1.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: February 19, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Tatsuya Sugita, Shinji Sekiguchi, Atsushi Kishioka, Shinichi Komura
  • Patent number: 8377765
    Abstract: The present invention provides a liquid crystal display device having a large holding capacitance in the inside of a pixel. A liquid crystal display device includes a first substrate, a second substrate arranged to face the first substrate in an opposed manner, and liquid crystal sandwiched between the first substrate and the second substrate. The first substrate includes a video signal line, a pixel electrode, a thin film transistor having a first electrode thereof connected to the video signal line and a second electrode thereof connected to the pixel electrode, a first silicon nitride film formed above the second electrode, an organic insulation film formed above the first silicon nitride film, a capacitance electrode formed above the organic insulation film, and a second silicon nitride film formed above the capacitance electrode and below the pixel electrode. The second silicon nitride film is a film which is formed at a temperature lower than a forming temperature of the first silicon nitride film.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: February 19, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hideo Tanabe, Masaru Takabatake, Toshiki Kaneko, Atsushi Hasegawa, Hiroko Sehata
  • Patent number: 8380124
    Abstract: A communication system by electrostatic coupling and electromagnetic induction includes: a first transmission part (3a) and a first reception part (3b) which exchange data therebetween through non-contact communication using electrostatic coupling; a second transmission part (4a) and a second reception part (4b) which exchange data therebetween through non-contact communication using electromagnetic induction; and an image display device (8) which displays an image based on the data thus received. With this configuration, it is possible to make communication performed by the first transmission part (3a) and the first reception part (3b) communication with higher speed, larger volume, and higher reliability.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: February 19, 2013
    Assignees: Hitachi, Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Ken Takei, Futoshi Furuta, Hiroshi Kageyama
  • Patent number: 8373808
    Abstract: A liquid crystal parallax barrier panel has the structure formed by stacking an electrode substrate, a liquid crystal layer and a sealing substrate in order. The electrode substrate includes a glass substrate, a first electrode which is branched in plural stages, a second electrode which is arranged on the same layer as the first electrode and is branched in plural stages, and an alignment film. Out of the first electrode and the second electrode, twig portions which include distal ends of branched portions of one electrode and twig portions which include distal ends of branched portions of another electrode are alternately arranged such that the twig portion which includes the distal end of the branched portion of one electrode enters between two twig portions which include the distal ends of branched portions of another electrode.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: February 12, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshiharu Owaku, Toshio Miyazawa, Hironori Kondo
  • Patent number: 8373636
    Abstract: A liquid crystal display includes pixels each having an switching element, drain drivers and gate drivers for operating the switching elements and the pixels, and drain lines and gate lines supplying signals from the drain drivers and the gate drivers to the switching elements being formed on one of a pair of substrates sandwiching a liquid crystal layer. Wiring lines are formed on the one of a pair of substrates for transferring display data signals and a clock signal to the gate drivers.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: February 12, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshihiro Imajo, Tetsuro Izawa, Kimitoshi Ohgiichi, Hiroshi Okawara, Shiro Ueda, Nobuyuki Ishige, Tetsuya Kawamura, Hisashi Ishino, Fumiaki Komori
  • Patent number: 8368311
    Abstract: The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.
    Type: Grant
    Filed: July 5, 2012
    Date of Patent: February 5, 2013
    Assignees: Hitachi, Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Naoki Tokuda, Hiroshi Kageyama, Masamitsu Furuie
  • Patent number: 8368837
    Abstract: A liquid crystal display device includes: a liquid crystal display panel; and a backlight disposed to face the liquid crystal display panel, the backlight including at least a frame having a bottom surface facing the liquid crystal display panel, a reflector placed on the bottom surface of the frame, and a plurality of light sources disposed on the liquid crystal display panel side of the reflector and supported by the frame, wherein a recess protruding in the opposite direction to the liquid crystal display panel is formed in the bottom surface of the frame, the recess and the reflector constituting an air duct.
    Type: Grant
    Filed: September 16, 2010
    Date of Patent: February 5, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takayuki Ota, Akio Tezuka
  • Patent number: 8366504
    Abstract: The present invention relates to a method of manufacturing a liquid crystal display device having a TFT substrate and a counter substrate, and prevents brightness unevenness from being caused by orientation film thickness unevenness. Orientation films for the TFT substrate (10) and the counter substrate (20) are formed by offset printing that is performed to transfer an orientation film material from a printing plate to the TFT substrate (10).The direction in which the printing plate for an offset printing machine rotates during offset printing is the long-axis direction of the TFT substrate (10) in the case of the TFT substrate (10) or the short-axis direction of the counter substrate in the case of the counter substrate. This ensures that brightness unevenness caused by orientation film thickness unevenness is inconspicuous even when the orientation film thickness unevenness is produced during offset printing.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: February 5, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yuko Matsumoto, Hidehiro Sonoda, Noboru Kunimatsu
  • Patent number: 8368830
    Abstract: To form a sufficiently large storage capacitor, a liquid crystal display device includes a liquid crystal display panel having a first substrate, a second substrate, and a liquid crystal held between the first substrate and the second substrate, the liquid crystal display panel having multiple pixels arranged in matrix. The first substrate has, in a transmissive display area provided in each of the pixels, a laminated structure containing a first transparent electrode, a first insulating film, a second transparent electrode, a second insulating film, and a third transparent electrode which are laminated in this order. The first transparent electrode and the second transparent electrode are electrically insulated from each other and together form a first storage capacitor through the first insulating film, and the second transparent electrode and the third transparent electrode are electrically insulated from each other and together form a second storage capacitor through the second insulating film.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: February 5, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Tohru Sasaki, Takahiro Ochiai
  • Patent number: 8368864
    Abstract: In a seal portion of a liquid crystal display device, column spacers are formed on a counter substrate side, organic passivation films are formed so as to face the column spacers on a TFT substrate side, and the gap between the TFT substrate and the counter substrate is controlled by the column spacers and the organic passivation films. A sealing material covers the column spacers and the organic passivation films and is in contact with an inorganic film formed on the TFT substrate on the TFT substrate side. Therefore, the adhesive force of the sealing material is improved to ensure the reliability of the seal portion.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: February 5, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Takahiro Nagami
  • Patent number: 8368080
    Abstract: The present invention provides light emitting displays which produce a bright image by efficiently emitting light radiated from a light-emitting thin-film layer to the viewer side, and also produces a high-quality image of high contrast ratio and changing in color to a limited extent over a wide viewing angle range even in a bright atmosphere.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: February 5, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Masaya Adachi, Osamu Itou
  • Patent number: 8368077
    Abstract: A second insulation layer which is formed by stacking a plurality of layers made of different materials in a mutually contact manner is formed such that the second insulation layer covers a source region and a drain region and also covers a gate electrode from above. A first contact hole which reaches one of the source region and the drain region and a recessed portion which is arranged above the gate electrode but is not communicated with the gate electrode are simultaneously formed on the second insulation layer by dry etching. A first line layer is formed so as to cover the first contact hole. After forming the first line layer, a bottom surface of the recessed portion is etched by dry etching thus forming a second contact hole which reaches the gate electrode in the first and second insulation layers. A second line layer is formed on the second contact hole.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: February 5, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Display Co., Ltd.
    Inventors: Takeshi Kuriyagawa, Takeshi Noda, Takuo Kaitoh
  • Patent number: 8363199
    Abstract: Provided is a liquid crystal display device including: a first substrate and a second substrate which are arranged so as to be opposed to each other for sandwiching a liquid crystal; an image display portion; a sealing material which seals the liquid crystal; and a light-shielding film which is formed on a liquid crystal side of the second substrate so that a part of the light-shielding film extends beyond the image display portion to overlap with the sealing material, and which has openings in the image display portion, at least in regions of the multiple pixels, in which the part of the light-shielding film that overlaps with the sealing material has a recessed portion formed on a sealing material side of the light-shielding film continuously or discontinuously along a circumferential direction of the sealing material, to a depth that is smaller than a thickness of the light-shielding film.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: January 29, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Kuninobu Sekiya, Yasuyuki Yamada
  • Patent number: 8363416
    Abstract: Provided is a display device including: a display panel; a circuit board; a connector mounted on the circuit board; a flexible wiring board attached to the connector; and a housing which accommodates the display panel, the circuit board, and one part of the flexible wiring board, and includes a slit formed therein, from which another part of the flexible wiring board is pulled out. The flexible wiring board includes, in the one part of the flexible wiring board, a first region extending in directions which intersect a pull-out direction from the slit, and having a width which is larger than a width of the flexible wiring board at a position overlapping the slit.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: January 29, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Hiroyuki Miyazaki
  • Patent number: 8363047
    Abstract: A display device includes a dynamic ratioless shift register which is operated in a stable manner and can expand the degree of freedom of design. In the dynamic ratioless shift register which is provided with thin film transistors having semiconductor layers made of p-Si on a substrate surface, a node which becomes the floating state is connected to a fixed potential through a capacitance element.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: January 29, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Toshio Miyazawa, Iwao Takemoto, Atsushi Hasegawa, Masashiro Maki, Kazutaka Goto
  • Patent number: 8363196
    Abstract: A display device includes a substrate having display portion and peripheral portion, a plurality of gate signal lines and a plurality of drain signal lines formed over the substrate, a plurality of switching elements connected to the plurality of gate signal lines and the plurality of drain signal lines and formed over the substrate, and a plurality of pixel electrodes connected to the plurality of switching elements and formed in the display portion. An organic interlayer film is formed in the display portion and the peripheral portion, and a covering layer is formed on the organic interlayer film in the peripheral portion and the insulating film includes at least one of a plurality of recesses and protuberances.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: January 29, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Tetsuya Kawamura, Kazuhiko Yanagawa, Nagatoshi Kurahashi, Tsuyoshi Uchida