Patents Assigned to Hitachi Display, Ltd.
  • Patent number: 8318527
    Abstract: Disclosed is a manufacturing method of a liquid crystal display device where first color filters, second color filters and third color filters which are formed adjacent to each other are provided, the first color filter and the second color filter are patterned in such a manner that one edge portion of the second color filter overlaps an edge portion of the first color filter, and the second color filter and the third color filter are patterned in such a manner that an edge portion of the third color filter overlaps the other edge portion of the second color filter wherein in an exposure step for patterning the second color filter, an exposure quantity in a region corresponding to one edge portion and an exposure quantity in a region corresponding to the other edge portion differ from each other.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: November 27, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Jun Fujiyoshi, Yasukazu Kimura, Hideo Tanabe
  • Patent number: 8314761
    Abstract: A processing portion for conversion from RGB to RGBW includes a W generating circuit, a sub-pixel rendering circuit, a W intensity calculating portion which transmits a W intensity setting value to a W generating circuit, and a low power backlight control circuit which expands data on the basis of the RGBW pixels generated by the sub-pixel rendering portion and lowers the backlight in accordance with the amount by which the data is expanded. The inputted RGB data is used as the RGBW data with the W intensity calculated by the W intensity calculating portion. A backlight control signal is generated based on the amount of data expansion in the sub-pixel rendering portion. Deterioration (darkness) of image quality due to a reduction in the brightness of a single color as a result of the conversion from RGB pixels to RGBW pixels is prevented and a reduction in the power is achieved.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: November 20, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Naoki Takada, Yasuyuki Kudo, Yoshiki Kurokawa, Norio Mamba, Shinichi Komura
  • Patent number: 8313806
    Abstract: Provided is a method for moving, in a vacuum chamber carrying therein a fixedly-provided evaporation source, a substrate toward the evaporation source together with a mask closely attached to the substrate surface, and onto the surface substrate, evaporating a material vaporized in the evaporation source through an aperture formed to the mask. In this method of the invention, means for moving the substrate toward the evaporation source is provided with cooling means not to come in contact with but to be in proximity to a surface of the mask on the evaporation source side, and a cooling plate formed with an aperture proximal to the evaporation source is disposed. With such a configuration, the steam of the material coming from the evaporation source is directed to the mask and the substrate through the aperture of the cooling plate.
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: November 20, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Display Co., Ltd.
    Inventor: Hiroyasu Matsuura
  • Publication number: 20120287029
    Abstract: A display device comprises a driver circuit having a shift register circuit having a level conversion function is provided with a simple circuit configuration of first, second, and third basic circuits connected in tandem at multistages. A common clear signal is supplied to a control electrode of a third transistor of each basic circuit, a first clock is supplied to a control electrode of a first transistor of each of the first and third basic circuits, a second clock different in phase from the first clock is supplied to a control electrode of a first transistor of the second basic circuit, outputs of the first and second basic circuit are respectively supplied to control electrodes of second transistors of the second and third basic circuits, and an inversion output of the third basic circuit is supplied to a control electrode of a fourth transistor of the first basic circuit.
    Type: Application
    Filed: July 24, 2012
    Publication date: November 15, 2012
    Applicants: Panasonic Liquid Crystal Displays Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Hideo SATO, Shigeyuki NISHITANI, Takayuki NAKAO, Masahiro MAKI
  • Patent number: 8310639
    Abstract: A display device with a plurality of gate signal lines extended in the first direction; a plurality of drain signal lines extended in the second direction; a plurality of pixel regions in a state that each pixel region includes a switching device, a pixel electrode which is connected with the drain signal line and a counter electrode. The counter electrode is formed with respect to the pixel electrode by way of an insulation film and is formed every pixel. The pixels include first pixels and second pixels, wherein only the first pixels have a counter voltage signal line which extends in the first direction, and the counter voltage signal line is connected with the counter electrodes in the first pixels. Further, the counter electrodes of the first pixels and the counter electrodes of the second pixels are electrically connected with each other using conductive stride over the gate signal line.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: November 13, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Akira Matsuoka, Kikuo Ono
  • Patent number: 8310641
    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: Grant
    Filed: February 1, 2012
    Date of Patent: November 13, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa
  • Patent number: 8309960
    Abstract: A display device includes a plurality of thin-film transistors formed on a substrate on which a display area is formed. At least one of the plurality of thin-film transistors includes a gate electrode, agate insulating film formed to cover the gate electrode, an interlayer insulating film formed on an upper surface of the gate insulating film and having an opening formed in an area where the gate electrode is formed in plan view, a pair of heavily-doped semiconductor films arranged on an upper surface of the interlayer insulating film with the opening interposed therebetween, a polycrystalline semiconductor film formed across the opening and formed in the area, the polycrystalline semiconductor film being electrically connected to the pair of heavily-doped semiconductor films, and a pair of electrodes formed to overlap the pair of heavily-doped semiconductor films, respectively, without overlapping the polycrystalline semiconductor film.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: November 13, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshiaki Toyota, Mieko Matsumura, Masatoshi Wakagi
  • Patent number: 8309965
    Abstract: Provided is a display device including a thin-film transistor and a capacitor element, the thin-film transistor includes: a first insulating film (IN1) which is formed to cover an area where a gate electrode (GT) is formed; a second insulating film (IN2) which is formed on the first insulating film, the second insulating film having an opening (OP) formed in the area in plan view; a semiconductor layer (SCLt) which is formed on the second insulating film to cross the opening, the semiconductor layer including high concentration areas (CN); a third insulating film (IN3) which is formed on the semiconductor layer to expose apart of each of the high concentration areas; and a pair of electrodes (DT, ST) each having electrical connection to the part; and the capacitor element includes a dielectric film which is formed of the same layer and the same material as the third insulating film.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: November 13, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Yoshiaki Toyota
  • Patent number: 8310611
    Abstract: Provided is a display device including: a gate electrode (GT); a semiconductor film (S) which controls a current flowing between a source electrode (ST) and a drain electrode (DT), the semiconductor film including a channel region and two impurity regions formed of regions which sandwich the channel region; two Ohmic contact layers (DS) being interposed between the source electrode and the like and the two impurity regions; and an insulating film laminated on a partial region of the semiconductor film, the partial region being around a position corresponding to a substantial center of the semiconductor film, in which: the semiconductor film is formed of one of microcrystalline-silicon and polycrystalline-silicon; the two impurity regions are formed in regions on which the insulating film is absent; the two Ohmic contact layers cover the two impurity regions therewith; and the source electrode and the like cover the Ohmic contact layers therewith.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: November 13, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takuo Kaitoh, Toshio Miyazawa, Takeshi Sakai
  • Patent number: 8310634
    Abstract: A liquid crystal display device includes first and second substrates with first and second polarizing layers, a liquid-crystal layer, a matrix-driven electrode group; and a rear-illuminating device. Between the first polarizing layer and the liquid-crystal layer, a first optical compensating member is disposed without a birefringent medium sandwiched between the liquid-crystal layer and the first optical compensating member, and the first optical compensating member is constructed so that when a refractive index thereof in a slow-axis direction in a plane parallel to the substrate is taken as n1, a refractive index in a fast-axis direction in the plane parallel to the substrate is taken as n2, and a refractive index in a thickness direction is taken as n3, the first optical compensating member satisfies n1?n3>n2, and a slow axis thereof in the plane parallel to the substrate is substantially vertical to an optical axis of the liquid-crystal layer.
    Type: Grant
    Filed: November 3, 2011
    Date of Patent: November 13, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Kentaro Ojima, Daisuke Kajita, Ikuo Hiyama, Masahiro Ishii
  • Patent number: 8310617
    Abstract: A liquid crystal display device includes: a liquid crystal display panel having a liquid crystal layer disposed between substrates facing each other; and a supporting frame holding the liquid crystal display panel and capable of being attached to backlight means, wherein an optical sheet disposed on the backlight means side of the liquid crystal display panel is provided, the supporting frame includes an upper frame, a mold frame, and a lower frame, the upper frame and the mold frame sandwiching the liquid crystal display panel therebetween, the mold frame and the lower frame sandwiching the optical sheet therebetween, and first fixing means (including a screw) for fixedly coupling the upper frame, the mold frame, and the lower frame with one another and second fixing means (including a screw) for fixedly coupling only the lower frame with the backlight means are separately disposed.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: November 13, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Shinji Shimizu
  • Patent number: 8310647
    Abstract: Disorder in the initial orientation (pretilt angle) and active orientation of liquid crystal molecules associated with higher resolution can be reduced to achieve high image quality displays. A layer having a drive element is bonded into an adhesive layer above color filters provided on the inner surface of a rear panel. The layer with the drive element, a drive electrode (pixel electrode), and a counter electrode are buried in the adhesive layer, so that the surface on the liquid crystal layer side is smooth. An orientation film is formed on the smooth surface to have a liquid crystal orientation control capability (orientation capability). A front panel includes a transparent substrate formed of glass or resin, with a smooth surface on the liquid crystal layer side. An orientation film is formed on the smooth surface of the front panel also to have liquid crystal orientation control capability (orientation capability).
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: November 13, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takahiko Muneyoshi, Kiyoshi Ouchi
  • Patent number: 8310614
    Abstract: A liquid crystal display device preventing a liquid crystal display panel from damage by bending of a light-transmissive substrate and capable of curving a display surface of the panel is provided. The liquid crystal display device comprising: a liquid crystal display panel having a liquid crystal layer sealed between a pair of light-transmissive substrates having pixel formation electrodes on inner surfaces thereof, and formed by assembling positive and negative curved surfaces with respect to one direction; a backlight mounted on a rear surface of the panel along a curved shape of the panel and having at least one light emission device irradiating illumination light toward the rear surface; and a resin member held in a space between peripheral portions where the panel is opposed to the backlight, and fixing and holding a curved state, is provided. Distortion of the light transmissive glass substrates by bending of the panel is eased.
    Type: Grant
    Filed: August 7, 2008
    Date of Patent: November 13, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Susumu Sasaki, Hitoshi Azuma, Takao Ebine, Tomio Yaguchi, Shoichi Uchino, Akiko Iwata
  • Patent number: 8310460
    Abstract: A display device with a touch panel includes a display panel, and an electrostatic-capacitance-coupling touch panel which is arranged on a viewer-side surface of the display panel. The touch panel includes a substrate; a first shield conductor which is formed on the viewer-side surface of the substrate; an insulation film which is formed on the first shield conductor; a plurality of first electrodes which are formed on the insulation film, extend in the first direction and are arranged parallel to each other in the second direction which intersects with the first direction; and a plurality of second electrodes which are formed on the insulation film, extend in the second direction and are arranged parallel to each other in the first direction which intersects with the second direction. A predetermined signal is inputted to the first shield conductor.
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: November 13, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Satoshi Saitou
  • Patent number: 8310437
    Abstract: The backlight device includes: a backlight including a plurality of light sources; and a backlight control part. The backlight includes a plurality of divided areas, and light sources disposed in each of the plurality of divided areas are chain-connected. The backlight control part includes at least one backlight control unit for controlling turning on and off of the backlight which includes the plurality of divided areas, with respect to the each divided area. The backlight control unit includes a selection unit for selecting one of divided areas, at least one backlight drive path. The selection unit selects the one of divided areas in a time division manner, and the light sources of the one of divided areas are driven by sharing the at least one backlight drive path in common.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: November 13, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Junichi Maruyama, Koji Hosogi, Yoshihisa Ooishi, Misa Owa, Kikuo Ono
  • Publication number: 20120280240
    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: Application
    Filed: July 16, 2012
    Publication date: November 8, 2012
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Tohru SASAKI, Takahiro OCHIAI
  • Patent number: 8305513
    Abstract: The present invention provides a liquid crystal display device in which a light transmitting conductive layer formed on a surface of a color filter substrate is electrically connected with a backlight lower frame using conductive rubber. One end of the conductive rubber is connected with the light transmitting conductive layer, and another end of the conductive rubber is connected with the backlight lower frame through a hole which is formed in a backlight upper frame. The liquid crystal display device of the present invention can remove static electricity charged in a surface of a display panel and, at the same time, can realize the narrowing of a picture frame and the reduction of thickness thereof.
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: November 6, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Norihisa Fukayama, Mutsumi Maehara
  • Patent number: 8305334
    Abstract: The invention provides a liquid crystal display device which can reduce the manufacturing cost by reducing the number of parts and simplifying the fabrication and the assembling operation, for the conduction between a metal frame and a color filter substrate. A liquid crystal display panel has a conductive layer on a front surface of a second glass substrate. A panel frame has a side wall part extending along a side wall of the liquid crystal display panel and an upper surface part extending from the side wall part toward a front surface direction of the liquid crystal display panel, integrally formed together. The upper surface part is in contact with the conductive layer of the liquid crystal display panel. A constant potential is applied to the panel frame.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: November 6, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Kozo Arisato, Masaki Ichio
  • Publication number: 20120274223
    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: Application
    Filed: July 5, 2012
    Publication date: November 1, 2012
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Naoki Tokuda, Hiroshi Kageyama, Masamitsu Furuie
  • Patent number: 8299997
    Abstract: A display device includes a TFT substrate with gate signal lines, drain signal lines, thin-film transistors connected thereto, a gate driver connected to the gate signal lines, a drain driver having output terminals connected to drain signal lines, and a film substrate having first wirings. The first wirings are disposed between the drain driver and the film substrate. The drain driver is mounted on the film substrate, and the output terminals are connected to the first wirings between the film substrate and the drain driver. The output terminal includes first group terminals formed in parallel with a longer edge of the drain driver, and second group terminals formed in parallel with the longer edge and disposed between the loner edge and the first group terminals.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: October 30, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Mitsuru Goto, Hiroko Hayata