Patents Assigned to Hitachi Display, Ltd.
  • Patent number: 8456603
    Abstract: The present invention prevents, when a COF which is connected with an external circuit is bent in a flat display device, the disconnection of lines on the COF. At a position where a line of the COF is connected to terminal portions of a TFT, and the line having a large width is branched into lines having a small width T1 to T3 or T4 to T6. By displacing line branching positions from each other as indicated by an arrow A and an arrow B, when the COF is bent or deformed, stress applied to the line branching positions can be dispersed thus preventing the disconnection of lines.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: June 4, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Yuuichi Takenaka
  • Patent number: 8451260
    Abstract: Each shift register includes a first element controlled by a first potential node to supply a first driving voltage to an output terminal, a second element controlled by a second potential node to supply a second driving voltage lower than the first driving voltage to the output terminal, and a third element for controlling the first potential node and the second potential node so as to have opposite potential levels. Voltages are applied to the third element so that a state of A>B and A>C and a state of A<B and A<C, or a state of A>B and A<C and a state of A<B and A>C, or a state of A<B and A>C and a state of A>B and A<C are switched alternately (A: a gate terminal of the third element, B: a voltage applied to a first terminal thereof, C: a voltage applied to a second terminal thereof).
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: May 28, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yuki Okada, Mitsuru Goto, Takahiro Ochiai, Naoki Takada, Youzou Nakayasu
  • Patent number: 8451418
    Abstract: A liquid crystal display device having a high definition screen in which a pixel electrode is formed in a region surrounded by a gate line and a drain line, and a trapezoidal protrusion having an upper surface and inclined surfaces is formed below the gate line. Since a TFT is formed over a trapezoidal protrusion and a channel portion is formed over the upper surface and the inclined surfaces of the trapezoidal protrusion, the width of the channel portion can be enlarged compared to that of a channel portion formed over a plane. The pixel electrode is in contact with a source electrode at the inclined surface of the trapezoidal protrusion. This configuration allows the TFT and a contact of the pixel electrode and a source electrode to be formed over part of the trapezoidal protrusion.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: May 28, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Jun Gotoh, Hirotaka Imayama, Shinichi Komura, Masato Shimura
  • Patent number: 8451399
    Abstract: A liquid crystal display device includes: a resin frame including a storing space formed of a hole which passes through a first surface and a second surface; a light guide plate disposed in the storing space; and a liquid crystal display panel which is fixed on the first surface of the resin frame so as to overlap the light guide plate. The hole of the resin frame is formed of an inner peripheral surface, which is inclined, so that an opening of the second surface is smaller than an opening of the first surface. The light guide plate includes an outer peripheral surface, which is inclined, and is disposed in the storing space in a manner that the inner peripheral surface and the outer peripheral surface are opposed to each other.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: May 28, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Shinichi Ishinagawa
  • Patent number: 8451409
    Abstract: A liquid crystal display device includes a first substrate, a second substrate, liquid crystal disposed between the first substrate and the second substrate, an electrode formed over the first substrate, and an alignment film disposed between the electrode and the liquid crystal. The electrode has a pad portion that protrudes from at least part of a side of the electrode and electrically leads out onto the first substrate through a conductive material that is located between the second substrate and the first substrate, and a direction in which at least one side of the pad portion which protrudes from the electrode is set to angle of 15° or more and 35° or less relative to a side of the first substrate which crosses the extended line of the at least one side of the pad portion.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: May 28, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hideyuki Shintani, Shinichi Soto, Hiroshi Saeki, Osamu Nagashima, Tomokazu Ishikawa
  • Patent number: 8451404
    Abstract: A display device having a pair of substrates provided so as to face each other and sandwich liquid crystal, and polarizing plates which are pasted to surfaces of the above described pair of substrates on the sides opposite to the above described liquid crystal, where the above described polarizing plates are formed of at least an inside protective film, a polarizing film and an outside protective film, which are layered on the above described substrate side in this order, an expansion axis of the above described outside protective films forms an angle of 30° or more and 90° or less with an expansion axis of the above described polarizing films, and an expansion axis of the above described inside protective films forms an angle of 0° or more and 3° or less with an expansion axis of the above described polarizing films.
    Type: Grant
    Filed: September 24, 2009
    Date of Patent: May 28, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Koichi Fukuda, Tetsuya Oshima, Satoru Kawasaki
  • Publication number: 20130128175
    Abstract: Image display device having an electrode forming layer which includes a plurality of gate lines, a plurality of drain lines, a plurality of switching elements and the a plurality of pixel electrodes, and having reference electrode layer between the electrode forming layer and a substrate where the electrode forming layer formed thereon, and the reference electrode layer and the electrode forming layer are insulated by insulating layer.
    Type: Application
    Filed: October 12, 2012
    Publication date: May 23, 2013
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
  • Patent number: 8446343
    Abstract: An image display apparatus capable of effecting displays high in both reliability and luminance. With the image display apparatus, a transistor switch is provided between a light emitting device and a drive transistor, and a voltage value expressed by formula (a gate voltage at an on-time of the transistor switch)—(the threshold voltage Vth of the drive transistor) is rendered smaller than a value of a voltage applied to a common electrode of the light emitting device.
    Type: Grant
    Filed: December 12, 2005
    Date of Patent: May 21, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hajime Akimoto, Hiroshi Kageyama
  • Patent number: 8446356
    Abstract: The display device including: a display panel; a backlight; a memory for converting frame rate of an input video signal and outputting a video signal; an interpolation frame generation unit for generating an interpolation frame based on the video signal output from the memory; a histogram generator for generating a histogram based on the input video signal; and a backlight brightness calculation unit for calculating a backlight control signal, the display device further comprising: wherein image data for display, which is obtained by an N-th frame of the input video signal, and image data of the interpolation frame generated based on the N-th frame and an (N+1)-th frame of the input video signal, is input to the display panel; and wherein the backlight control signal calculated based on the histogram generated based on the image data of the N-th frame is used for displaying the image data for display.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: May 21, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshihisa Ooishi, Junichi Maruyama, Takashi Shoji, Kikuo Ono, Masahiro Fukata
  • Patent number: 8446347
    Abstract: In an organic electroluminescent light emitting display device comprising a plurality of pixels each of which includes an organic electroluminescent element emitting light by a current supplied thereto, a plurality of active elements including a first active element which acquires a data signal and a second active element which regulates the current supplied to the organic electroluminescent element in accordance with the data signal, and a capacitive element storing the data signal, the present invention utilizes a part of the capacitive element arranged in one of the pixels for a light shielding member which shields the plurality of active elements arranged the one of the pixels from light emitted by the organic electroluminescent element arranged therein or another pixel adjacent thereto so as to suppress image quality deterioration and smear appearing in an image display area of the organic electroluminescent light emitting display device.
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: May 21, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Toshihiro Sato, Genshiro Kawachi, Yoshiro Mikami, Masaya Adachi
  • Patent number: 8446557
    Abstract: The liquid crystal display device according to the present invention is a thin liquid crystal display device where it is easy to position the flexible printed circuit on which light emitting diodes are mounted. In the liquid crystal display device having a liquid crystal display panel and a flexible printed circuit (FPC) that is connected to the liquid crystal display panel and supplies power for driving display pixels, light emitting diodes (LED) are mounted on a portion of the flexible printed circuit, a mold frame MFR is provided to contain the light emitting diodes, and through holes (60, 61) for positioning are created in both the flexible printed circuit and the mold frame.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: May 21, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Eiji Oohira
  • Publication number: 20130120353
    Abstract: There is a need for decreasing a variation in times for writing to TFT elements for pixels in a direction along the extension of a gate line in a liquid crystal display apparatus. A display apparatus includes a display panel having multiple gate lines and drain lines arranged in a matrix and a data driver for outputting a display data signal to each drain line. The data driver includes: an internal control signal generation circuit generating an internal control signal for setting a timing to output a data signal to a drain line of each block on a block basis by dividing the plurality of drain lines into multiple blocks; and a register circuit for recording a setting for division of the block, a setting for delay direction and width of a timing to output the data signal, and a setting for rising and falling of an internal control signal.
    Type: Application
    Filed: January 7, 2013
    Publication date: May 16, 2013
    Applicants: Panasonic Liquid Crystal Displays Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Yasuhiro TANAKA, Hironobu Isami, Haruhisa Iida, Hidenori Kikuchi, Yukihide Ode
  • Patent number: 8441628
    Abstract: The present invention provides an apparatus for inspecting an illumination device where the illumination device allows light from one or more light sources to be emitted to the outside through a number of optical sheets layered on top of each other. The apparatus is provided with: a work stage on which an illumination device is placed; a work frame for fixing the position of the illumination device placed on the work stage; and a pressure reducing apparatus for making the pressure in the space inside the illumination device lower than the pressure in the space outside the apparatus for inspecting an illumination device when turned on during the inspection, wherein the work frame has an opening through which light from the illumination device is emitted and makes contact with the outer periphery of the illumination device and the work stage, respectively, through annular form during the inspection.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: May 14, 2013
    Assignee: Hitachi Displays, Ltd.
    Inventor: Junichi Mitsuhashi
  • Patent number: 8441607
    Abstract: A display device which can ensure sufficient adhesive strength between each pair of substrates of a liquid crystal display panel and a sealing material includes: a first substrate having a predetermined integrated circuit; a second substrate on one surface of the first substrate in an overlapping manner; and an adhesive material between the first substrate and the second substrate that has an annular planar shape. The adhesive material adheres the first substrate and the second substrate, wherein an outer periphery of the adhesive material includes a zone which includes a plurality of first portions passing substantially the same position as an outer periphery of the surface of the first substrate and a plurality of second portions each connected with the two neighboring first portions and having a center portion thereof in a peripheral direction retracted toward an inner peripheral side of the adhesive material.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: May 14, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Aki Tsuchiya, Takashi Yamamoto, Akira Ishii, Naoki Kikuchi, Yoshihiro Arai
  • Patent number: 8441186
    Abstract: An organic electroluminescence display device is disclosed wherein plural organic electroluminescence elements each having an anode, a cathode and an organic layer sandwiched in between the anode and the cathode, the plural organic electroluminescence elements including organic electroluminescence elements developing different colors in a row direction, and at least one of the organic layers having an outer edge of a conic section at an end portion in a column direction thereof, the outer edge of the conic section becoming narrower gradually in its width in a row direction of vapor deposition thereof toward an extreme end at an end portion in a column direction thereof. The organic electroluminescence display device can improve the vapor deposition accuracy and the degree of design freedom.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: May 14, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Noriharu Matsudate, Takeshi Ookawara, Kenta Kajiyama
  • Patent number: 8441596
    Abstract: This invention provides a liquid crystal display device where the brightness of the backlight can be prevented from lowering when the liquid crystal display device and its frame are thin. The liquid crystal display device has a liquid crystal display panel and a backlight for radiating light on the rear of the liquid crystal display panel, and is characterized in that the backlight has light emitting diodes LED that are secured on one surface of a flexible printed circuit FPC and a light guide plate for guiding light emitted from the light emitting diodes, the flexible printed circuit has openings in a portion between the light emitting diodes and the light guide plate, which extends partly over the light emitting areas (EA) of the light emitting diodes, and a reflective member is provided on the other surface of the flexible printed circuit so as to cover the openings.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: May 14, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yasuhisa Shiraishi, Ryosuke Miyachi
  • Patent number: 8436830
    Abstract: Provided is a display device with a touch panel, the display device including a display panel and a capacitance coupling type touch panel disposed on a surface of an observer side of the display panel. The capacitance coupling type touch panel includes on a substrate a plurality of first electrodes and a plurality of second electrodes. Each of the plurality of first electrodes includes a first portion formed on a layer different from a layer of the plurality of second electrodes to intersect one of the plurality of second electrodes, and a second portion formed on the same layer as the layer of the plurality of second electrodes separately from the plurality of second electrodes. The first portion is connected to the second portion via a contact hole formed through an insulating film formed between the first portion and the plurality of second electrodes.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: May 7, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Masahiro Teramoto
  • Patent number: 8436841
    Abstract: A display apparatus includes data lines, scanning lines arranged to cross the data lines, and pixel circuits aligning along the data lines and the scanning lines, such that one of the pixel circuits corresponds to each intersection between the data lines and the scanning lines. In addition, image signal lines transmit image signals, and switches connect the data lines to the image signal lines so that each of the data lines is connected to one of the image signal lines. The data lines are arranged such that adjacent data lines form a pair of data lines, and adjacent pairs of data lines are spaced apart from each other by two columns of pixel-circuits. Respective data lines of the pair of data lines are connected by the switches to two different image signal lines, and the switches connecting the pair of data lines to corresponding image signal lines are activated simultaneously.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: May 7, 2013
    Assignees: Canon Kabushiki Kaisha, Hitachi Displays, Ltd.
    Inventors: Hiroyuki Maru, Masami Iseki, Fujio Kawano, Tatsuhito Goden, Takanori Yamashita, Kouji Ikeda, Takeshi Izumida, Hiroshi Kageyama
  • Patent number: 8436358
    Abstract: Provided is an image display device including thin film transistors on a substrate, including: gate lines and drain lines intersecting the gate lines, each thin film transistor having, in a channel region, a laminate structure in which a gate electrode, a gate insulating film, and a semiconductor layer are laminated in the stated order from the substrate side; and a pair of removal regions in which parts of the gate insulating film are removed, which are formed on both sides of the gate electrode and formed in a channel width direction of the channel region, in which when W represents a width of the gate electrode in the channel width direction of the channel region, and R represents a width of the gate insulating film in the channel width direction, which is sandwiched between the pair of removal regions, R?W is satisfied.
    Type: Grant
    Filed: April 18, 2011
    Date of Patent: May 7, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Yoshiaki Toyota
  • Patent number: 8432349
    Abstract: A liquid crystal display device includes plural video signal lines, plural video signal input terminals less in number than the video signal lines, and a switch circuit interposed between the video signal input terminals and the video signal lines. The switch circuit has plural switch elements and plural switching wires, wherein each of the video signal lines is connected to one of the video signal input terminals via one of the switch elements, and each of the video signal input terminals is connected to a plurality of the video signal lines. Further, switching wires, to which are connected the switch elements connected one to each of the plural video signal lines, differ from one another.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: April 30, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Tohru Sasaki, Takahiro Ochiai, Toshio Miyazawa