Patents Assigned to Hitachi Displays, Ltd.
  • Patent number: 8552973
    Abstract: A liquid crystal display device where one display region of the liquid crystal display panel is divided into a first display region and a second display region along a border line in the direction in which scanning signal lines extend, a video signal line to which TFT elements of pixels in the first display region are connected and a video signal line to which TFT elements of pixels in the second display region are connected are electrically isolated from each other. Pixels having TFT elements connected to one of two adjacent video signal lines and pixels TFT elements connected to the other of the two adjacent video signal lines are alternate in a column of a number of pixels aligned in the direction in which the video signal lines extend in the first display region and the second display region.
    Type: Grant
    Filed: October 16, 2008
    Date of Patent: October 8, 2013
    Assignees: Hitachi Displays Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Kikuo Ono
  • Patent number: 8547494
    Abstract: A display device includes a substrate, a display region having a pixel switch, and a transparent common electrode, a peripheral region having a gate signal line connected to the pixel switch, and a common connection line connected to the transparent common electrode, an insulating layer, a conductive layer, a first semiconductor film disposed between the insulating layer and the conductive layer, and a second semiconductor film disposed between the insulating layer and the conductor layer and separated from the first semiconductor film. The conductor layer is connected to the gate signal line, and the gate signal line is arranged in the display region and the peripheral region. The common connection line is arranged in the peripheral region and is connected to the transparent common electrode in the peripheral region, and the transparent common electrode is arranged in the display region.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: October 1, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hirokazu Itakura, Hitoshi Komeno, Tomoaki Takahashi
  • Patent number: 8546812
    Abstract: A display panel includes a plurality of pads configured to provide a driver thereon, a plurality of first contacts respectively connected to the plurality of pads, a plurality of second contacts respectively provided so as to be opposed to the plurality of first contacts, a polysilicon layer configured to form a plurality of polysilicon films that are respectively extended to connect the plurality of first contacts and the plurality of second contacts to each other, and a gate metal layer different from the polysilicon layer. Each of a plurality of transistors is formed at a position where the gate metal layer traverses the polysilicon layer, and a plurality of transistor groups are arranged in a zigzag pattern. Each of the plurality of transistor groups include three adjacent transistors of the plurality of transistors.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: October 1, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Syou Yanagisawa
  • Patent number: 8547306
    Abstract: The present invention enhances a display quality of a display device as a task. As means for solving such a task, the present invention provides a display device including a light emitting element and a switching element in a pixel, wherein the switching element is provided for supplying a power source to the light emitting element and is constituted of a first switching element and a second switching element.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: October 1, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Masahiro Tanaka, Toshiyuki Matsuura, Hajime Murakami, Hajime Akimoto
  • Patent number: 8547318
    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: January 8, 2013
    Date of Patent: October 1, 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: 8547514
    Abstract: Provided is a liquid crystal display device where source electrodes each of which includes an overlapping portion which is a portion overlapping a surface of a pixel electrode, video signal lines each of which is formed of a stacked portion constituted of the metal layer and the semiconductor layer, and drain electrodes each of which is formed of a stacked portion constituted of the metal layer and the semiconductor layer are formed, and opening portions each of which exposes a joining portion which is a portion leading to a surface of the pixel electrode from a surface of the source electrode via an edge portion of the overlapping portion are formed in a second insulation layer, and a conductive film which is formed into a common electrode is formed over the joining portion exposed by the opening portion.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: October 1, 2013
    Assignee: Hitachi Displays, Ltd.
    Inventors: Tomokazu Ishikawa, Osamu Nagashima
  • Publication number: 20130250612
    Abstract: The present invention relates to a technique which makes a backlight used in a liquid crystal display device thin and light-weight. The present invention provides a liquid crystal display device which includes a display panel and a backlight arranged behind the display panel, wherein the backlight includes a film-like light guide member, a film-like light semi-transmissive member adhered to a first surface of the light guide member which faces the display panel in an opposed manner, a film-like reflective member adhered to a back surface of the light guide member opposite to the first surface, and a spot light source arranged at a position of the light guide member at which light is incident on the light guide member from the first surface or the back surface. A refractive index of the light semi-transmissive member is set smaller than a refractive index of the light guide member.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 26, 2013
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Display, Ltd.
    Inventor: Hiroshi KURIHARA
  • Publication number: 20130250218
    Abstract: The present invention provides a liquid crystal display device which includes a first pixel and a second pixel which are arranged close to each other and are allocated to the same color, and color filters which differ in color tone and are formed on the first pixel and the second pixel, wherein a voltage for driving liquid crystal of the first pixel and a voltage for driving liquid crystal of the second pixel are controlled independently from each other.
    Type: Application
    Filed: May 24, 2013
    Publication date: September 26, 2013
    Applicant: Hitachi Displays, Ltd.
    Inventors: Koichi IGETA, Toshiki ASAKURA
  • Patent number: 8542213
    Abstract: In a touched position detection method for a touch panel for detecting a touched position, based on measured values by a plurality of sensors, presence of a touch is determined when a measured value by a sensor exceeds a touch threshold. As a touch threshold, a value which cannot be attained due to a mere noise but can due to presence of a touch is set. With respect to sensors located in the vicinity of a sensor showing a high measured value, a higher weighted value is applied to modify a measured value in a touched position calculation process than that to be applied to other sensors.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: September 24, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Koji Doi, Norio Mamba, Koji Nagata, Toshiyuki Kumagai, Koji Hayakawa, Toshiaki Atsuta
  • Patent number: 8542168
    Abstract: The present invention provides a display method realizing reduction in a moving picture blurring by forming one frame by two fields of different luminance, in which increase in an unapplied voltage due to shortening of data voltage write time is suppressed. A gate voltage is applied in a light field for a period of time which is twice as long as scan line selection time, thereby decreasing an unapplied voltage. On the other hand, a gate voltage is applied normally in a dark field for the scan line selection time, so that the case where the unapplied voltage increases is eliminated. As a result, an image with high reproducibility can be obtained.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: September 24, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Ikuko Mori, Kikuo Ono
  • Patent number: 8542179
    Abstract: A gate signal line driving circuit and a display device includes first and second low voltage application switching elements that supply a low voltage to gate signal lines, a holding capacitor that is connected to a reset target node and supplies an ON signal towards the first and second low voltage application switching elements in a signal low period, first and third control switching elements the one ends of which are connected to the switch input of the first or second low voltage application switching element, and second and fourth control switching elements which each are provided between the switch input of the first or second low voltage application switching element and one end of the holding capacitor. In a startup period, a high voltage is supplied to the holding capacitor through the first to fourth control switching elements.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: September 24, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takeshi Shibata, Yoshihiro Kotani, Takahiro Ochiai, Mitsuru Goto
  • Publication number: 20130240863
    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: Application
    Filed: May 8, 2013
    Publication date: September 19, 2013
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Toshihiro SATO, Genshiro Kawachi, Yoshiro Mikami, Masaya Adachi
  • Publication number: 20130242249
    Abstract: A liquid crystal display device includes a first substrate and a second substrate which sandwiches a liquid crystal between itself and the first substrate, wherein the first substrate has thin film transistors and a wiring connection portion in which are formed terminals connected to the thin film transistors, a wiring substrate connected to the terminals is disposed in the wiring connection portion, the second substrate is a plastic substrate, and has an adhesive layer and an inorganic insulating layer formed on top of the adhesive layer, and the adhesive layer covers the wiring connection portion and one portion of the wiring substrate.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 19, 2013
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Display, Ltd.
    Inventors: Hitoshi AZUMA, Susumu SASAKI, Tomio YAGUCHI, Takao EBINE, Katsuyuu TAKAHASHI, Shoichi UCHINO, Akiko IWATA
  • Patent number: 8537298
    Abstract: In a liquid crystal display device of IPS mode with a smaller number of layers, a gate electrode is formed on a TFT substrate. A gate insulating film is formed to cover the gate electrode, on which a semiconductor layer is formed. A drain electrode and a source electrode are placed on the semiconductor layer. A planar pixel electrode is formed from ITO on the gate insulating film prior to the formation of the drain electrode, source electrode, image signal line, and the like. This process is performed to prevent the image signal line, the drain electrode, the source electrode, and the like, from being consumed by the cell reaction through a developer during the patterning of the ITO when a pin hole is present in the ITO, in order not to cause disconnection. As a result, it is possible to improve the production yield and achieve high reliability.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: September 17, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Kenji Anjo, Tomohiko Ootani
  • Patent number: 8534859
    Abstract: Provided is a liquid crystal display device, including: a liquid crystal panel having a display region; and a backlight unit disposed below the liquid crystal panel, in which: the backlight unit includes: at least one mounting substrate on which light emitting diodes are mounted; a radiator plate; and a reflection member; the reflection member has a reflection surface which is formed to have a recess surface shape; the light emitting diodes on the at least one mounting substrate are disposed on a bottom portion of the reflection surface; the at least one mounting substrate is disposed at a position under the bottom portion; the radiator plate is disposed under the at least one mounting substrate; and the radiator plate has, in plan view, a larger area than the at least one mounting substrate and a smaller area than the display region.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: September 17, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Ikuko Imajo, Masashi Baba, Sachiko Yamazaki
  • Patent number: 8537136
    Abstract: Provided is an electrostatic capacity type touch panel, which responds to not only an input by a finger but also a touch by a nonconductive input member. Disposed are X electrodes XP and Y electrodes YP that cross each other via a first insulating layer 2, and a Z electrode formed of a transparent elastic conductive resin layer 4 via a second insulating layer 3. The transparent elastic conductive resin layer 4 is a high polymer elastic resin layer in which conductive fine particles are dispersed, and is made of a material in which density of the conductive fine particles is increased by pressure of a touch.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: September 17, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Shinji Sekiguchi, Koji Nagata, Kouji Hayakawa
  • Patent number: 8537081
    Abstract: The present invention comprises: a display unit having a plurality of pixels arranged therein, each pixel including an organic EL element 24, a switching TFT, and a drive TFT; a data signal drive circuit for receiving image data for each frame period and outputting an image signal based on the image data; a scanning signal drive circuit for outputting a scanning signal for controlling a timing at which the switching element of each of the plurality of pixels receives the image signal; and a current source (a light emission power supply unit and a cathode potential control circuit together) for outputting a current supplied to the light emitting unit of each of the plurality of pixels through its drive element; wherein the current source modulates the value of the output current within each frame period.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: September 17, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hiroki Awakura, Naruhiko Kasai, Tsutomu Furuhashi, Toshihiro Satou
  • Patent number: 8537097
    Abstract: The present invention provides a liquid crystal display device having an LED drive circuit which can control a dimming control signal even with a pulse width of several tens ?sec or less. The LED drive circuit includes a booster circuit, a first stage current mirror circuit generating a reference current, a second stage current mirror circuit generating a driving current from the reference current, a light-emitting diode column having a light-emitting diode supplied with the driving current, and a dimming control circuit controlling the turning on and off of the light-emitting diode based on a dimming control signal.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: September 17, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Norimitsu Nishikawa, Satoshi Takahashi
  • Patent number: 8537304
    Abstract: The liquid crystal display device includes: a liquid crystal panel in which liquid crystal is held in a cell between a first substrate and second substrate opposed to each other, an illumination device which is placed on a side of the first substrate of the liquid crystal panel; a polarization layer containing a dichroic dye that has lyotropic liquid crystal properties which is formed by application on a surface of the first substrate of the liquid crystal panel that is opposite from the liquid crystal; and a condenser lens which condenses light from the illumination device to an interior of the cell, and/or a resin layer which protects the polarization layer, which are disposed on a top surface of the polarization layer.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: September 17, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Atsushi Kishioka, Shinji Sekiguchi
  • Patent number: 8537125
    Abstract: A display device having an electrostatic capacity touch panel includes: X electrodes XP and Y electrodes YP which intersect each other via a first insulating layer; and a plurality of Z electrodes disposed in a floating state via a second insulating layer. For the second insulating layer, a material such as an elastic insulating material which changes in thickness by pressing of touch is used. The Z electrode is disposed so as to overlap both one of the X electrodes and one of the Y electrodes. A pad part of the X electrode has a largest area in the vicinity of a thin line part of the X electrode, and a smallest area in the vicinity of the thin line part of the adjacent X electrode. An area of the pad part is reduced as the pad part departs from the thin line part of the X electrode.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: September 17, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Norio Mamba, Tsutomu Furuhashi, Kouichi Anno