Patents Assigned to Hitachi Displays, Ltd.
  • Patent number: 8576255
    Abstract: A luminance distribution at the highest gradation level is corrected to a curved plane luminance distribution in such a manner that the maximum gradation input to a display panel shows a curved luminance plane having the highest luminance at the center of the display panel and a lower luminance in the peripheral area of the display panel. The luminance distribution at the minimum gradation is corrected in such a manner that the minimum gradation shows a curved luminance plane having the lowest luminance at the center of the display panel and a higher luminance in the peripheral area of the display panel.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: November 5, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yukari Katayama, Yasuyuki Kudo, Norio Mamba, Yoshinori Tanaka
  • Patent number: 8576314
    Abstract: The present invention provides a photosensor device including: a photodiode array in which photodiodes are arranged in an array shape; scanning lines which are coupled to first electrodes of the photodiodes in respective lines of the photodiode array; read lines which are coupled to second electrodes of the photodiodes in respective columns of the photodiode array; a scanning circuit which is coupled to the scanning lines and sequentially supplies a selected scanning signal to the respective scanning lines in each horizontal scanning period; and a signal processing circuit which is coupled to the read lines and loads each voltage fluctuation of the read lines in one horizontal scanning period as signal voltage when reading a signal, wherein each of the photodiodes is made of amorphous silicon or microcrystal silicon, and forward bias voltage is applied to each of the photodiodes when reading a signal.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: November 5, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Kozo Yasuda, Toshio Miyazawa
  • Publication number: 20130285890
    Abstract: An image processing unit (2 in FIG. 1) discards a high gray level side of input image data (RiGiBi) in accordance with a chroma coefficient (Csc), thereby to generate a signal of lowered chroma, and it expands the signal into output image data (RoGoBo) of full scale. Besides, the image processing unit (2) generates an image adjustment parameter (Th) and performs a control so as to reduce power of backlight (6), in interlocking with the fullscale expansion.
    Type: Application
    Filed: June 27, 2013
    Publication date: October 31, 2013
    Applicants: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., HITACHI DISPLAYS, LTD.
    Inventors: Norio MAMBA, Naoki TAKADA, Yasuki KUDO, Tsutomu FURUHASHI
  • Publication number: 20130286313
    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: June 26, 2013
    Publication date: October 31, 2013
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Yoshiaki NAKAYOSHI, Kazuhiko YANAGAWA
  • Publication number: 20130286337
    Abstract: The liquid crystal display device is provided with a plurality of spacers and a plurality of pedestals which include a first group of the spacers and the pedestals, the first group including at least a pair of one of the spacers and one of the pedestals opposing to each other, and a second group of the spacers and the pedestals, the second group including at least another pair of another one of the spacers and another one of the pedestals opposing to each other, in which the pair of the spacer and the pedestal which form the first group and the pair of the spacer and the pedestal which form the second group are disposed so that a center of the first surface and a center of the second surface are displaced in different directions.
    Type: Application
    Filed: June 27, 2013
    Publication date: October 31, 2013
    Applicants: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., HITACHI DISPLAYS, LTD.
    Inventors: Takao SATO, Yuji MAEDE, Toshiyuki MIMA, Toshiyuki KOSHITA
  • Patent number: 8570302
    Abstract: It is an object of the present invention to allow a specified function to be readily selected in a mobile telephone or the like without performing a complicated operation. A liquid crystal (30) is sandwiched between a TFT substrate (10) and a color filter substrate (20). A photosensor TFT (130) for selecting the function is disposed on the periphery of an effective screen of the TFT substrate (10). A window (24) is provided in a portion of the color filter substrate corresponding to the photosensor TFT (130), and the outside light is blocked as a result of the user touching a finger to the window. A signal from the photosensor is used for selecting the function. A correction sensor TFT (133) is disposed adjacent to the photosensor TFT (130), to thereby eliminating noise caused by the temperature distribution, stray light, or the like, and erroneous operation of the photosensoris prevented.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: October 29, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Teruaki Saito, Hideo Sato, Shigeyuki Nishitani
  • Patent number: 8570462
    Abstract: Provided is a liquid crystal display device including: a liquid crystal cell (15) including a first substrate (110), a second substrate (111), and a liquid crystal layer (160) sealed between the first substrate and the second substrate; a first polarization member (210) for transmitting light in a predetermined polarization direction; and a second polarization member (220) for transmitting light in another polarization direction which is orthogonal to the predetermined polarization direction. At least one of the first polarization member and the second polarization member includes a multilayer thin film polarizer including a plurality of thin film polarizers which are stacked so that transmission axes of the plurality of thin film polarizers are aligned. The multilayer thin film polarizer includes a thin film polarizer formed in a predetermined film thickness by coating with dye molecules which are aligned by a shear stress.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: October 29, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takato Hiratsuka, Masaya Adachi, Miharu Otani, Jun Tanaka, Chie Yoshizawa
  • Patent number: 8563982
    Abstract: In a liquid crystal display device that uses a top gate TFT, a contact hole is formed to connect to an image signal line. An inorganic passivation film and an organic passivation film are formed in this order so as to cover the TFT, on which a common electrode is formed. Then, an interlayer insulating film is formed on the common electrode. A through hole for gas release is formed in the interlayer insulating film. The diameter of the through hole is greater than the diameter of the contact hole, so as to be able to easily release gas from the organic passivation film, and to prevent the interlayer insulating film from peeling off.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: October 22, 2013
    Assignee: Hitachi Displays, Ltd.
    Inventors: Takao Nakamura, Kazuki Ishii, Daisuke Mutou, Hidenori Seki
  • Patent number: 8564752
    Abstract: A liquid crystal display includes a first substrate, a second substrate, and a liquid crystal disposed between the first substrate having first signal lines and second signal lines defining pixel regions and the second substrate. The pixel regions include a first transparent electrode, and a second transparent electrode which is overlapped with the first electrode through an insulating layer. The second transparent electrode is elongated so as to extend to plural pixel regions in overlapping relation with the first signal line which extends in plural pixel regions, and at least one strip-shaped opening portion is delimited between adjacent second transparent electrodes arranged in an extension direction of the first signal line, the at least one strip-shaped opening portion being formed in overlapping relation with the second signal line. A metal line is connected to the second transparent electrode, the metal line being elongated to extend to plural pixel regions.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: October 22, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Co., Ltd.
    Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
  • Patent number: 8564550
    Abstract: A display device having X electrodes and Y electrodes formed on an electrostatic capacitive type touch panel. Either one of the X electrodes and the Y electrodes is divided corresponding to a ratio between the number of X electrodes and the number of Y electrodes, and a floating electrode is formed in gaps formed along with the reduction of area of the electrode thus adjusting the area of the electrode. A first signal line and second signal lines are branched on a flexible printed circuit board so that both ends of a respective X electrode are supplied with a signal from the branched first signal line and both ends of a respective Y electrode are supplied with a signal from the branched second signal line.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: October 22, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Shinya Hashimoto
  • Patent number: 8558449
    Abstract: A display device having a plurality of light-emitting elements that construct picture elements aligned on a substrate in a formation of a matrix. The light-emitting element includes a light-emitting device having a flat surface portion and including a light-emitting layer, an anode and a cathode, a driver element connected with the light-emitting element, an insulation layer having a contact hole formed over the driver element, wherein the anode is formed on the insulation layer and connected to the driver element via the contact hole, and a tilted reflective surface is provided in a peripheral area surrounding the flat surface portion of the light-emitting device and has a tilt angle against the flat surface portion of the light-emitting device, wherein the tilted reflective surface is provided on a surface of a slope of a bank that is provided on the substrate.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: October 15, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Masaya Adachi, Kazutaka Tsuji, Hajime Murakami, Etsuko Nishimura
  • Patent number: 8558965
    Abstract: A hand-held electronic device includes a liquid crystal display device having a first substrate, a second substrate bonded to the first substrate, with liquid crystal material held between the first substrate and the second substrate, and an upper polarizing plate affixed to the second substrate. A protective member is disposed over the upper polarizing plate, and an adhesive member is disposed between the protective member and the upper polarizing plate without an air layer between the protective member and the upper polarizing plate. The protective member is configured as a protective cover of the hand-held electronic device.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: October 15, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Koichi Fukuda
  • Patent number: 8558267
    Abstract: An organic EL display device manufacturing method that allows the reliability of the organic EL display device having undergone a defect repair process to be improved. Manufacturing method for organic EL display device, method including an organic EL element substrate formation step of forming at least one organic EL element on an organic EL element substrate, the organic EL element including an organic EL film, an anode electrode, reflection electrode that form a first conductive film provided below the organic EL film, a cathode electrode that forms a second conductive film provided above the to organic EL film, resin sealing step of providing a thermoplastic sealing resin to cover the upper side of the organic EL element, defect detection step of detecting a defect in the organic EL element, and defect elimination step of eliminating the defect detected in the defect detection step by irradiating the defect with a laser beam.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: October 15, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Kazuhiko Kai, Masahiro Tanaka, Yoshinori Ishii
  • Patent number: 8558968
    Abstract: The liquid crystal display device includes: a substantially rectangular optical switching member in which a first polarizer, a first substrate, a second substrate, and a second polarizer are sequentially provided from a front surface side; a frame which surrounds the optical switching member; a planar light source which is disposed at the rear surface of the optical switching member; at least one optical sheet group which is disposed at the front surface of the planar light source; and an adhesive layer which fixes the optical switching member, the frame, and the optical sheet group to each other, and has a substantially rectangular opening, wherein at least one side of an optical sheet included in the optical sheet group and located at the frontmost surface is adhered to the adhesive layer, and the other sides are located inside the opening of the adhesive layer.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: October 15, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Eiji Oohira
  • Patent number: 8558779
    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: Grant
    Filed: July 24, 2012
    Date of Patent: October 15, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hideo Sato, Shigeyuki Nishitani, Takayuki Nakao, Masahiro Maki
  • Patent number: 8558979
    Abstract: Provided is a liquid crystal display device including: a thin film transistor substrate; a counter substrate which is arranged to face the thin film transistor substrate in an opposed manner; and a liquid crystal layer sandwiched between the thin film transistor substrate and the counter substrate, wherein the thin film transistor substrate includes a first electrode and a second electrode for applying an electric field in a substrate in-plane direction, the first electrode includes a plurality of strip portions which extend in a predetermined direction, and a chiral dopant which imparts the rotation in a direction opposite to a rotational direction of liquid crystal induced by an electric field applied between the strip portions and the second electrode is added to the liquid crystal layer.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: October 15, 2013
    Assignee: Hitachi Displays, Ltd.
    Inventor: Hirotaka Imayama
  • Publication number: 20130265531
    Abstract: The present invention is intended to control the color temperature of white exhibited by a liquid crystal display device. White is produced when light waves emitted through pixels associated with three colors of red, green, and blue have maximum intensities. The amounts of light emitted through the respective pixels are controlled by differentiating the shapes of the pixel electrodes disposed at the respective pixels from one another. Thus, the color temperature of white is controlled. Otherwise, the shapes of interceptive films disposed at the respective pixels are differentiated from one another in order to control light waves emitted through the respective pixels. Thus, the color temperature of white is controlled. The interceptive film may be shaped like the pixel electrode. Otherwise, the interceptive film may be realized with an interceptive pattern other than that of the pixel electrode or one of openings bored in a black matrix.
    Type: Application
    Filed: April 3, 2013
    Publication date: October 10, 2013
    Applicants: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., HITACHI DISPLAYS, LTD.
    Inventors: Ikuko MORI, Munenori MOTOOKA, Ryutaro OKE, Kazunori OJIMA, Kikuo ONO
  • 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: 8553179
    Abstract: A liquid crystal display device includes: a liquid crystal layer which contains a liquid crystal composition; a pair of substrates opposed to each other across the liquid crystal layer; alignment layers placed on liquid crystal layer sides of the pair of substrates, respectively; and polarization plates placed on opposite sides from the liquid crystal layer sides, respectively. The pair of substrates includes a thin-film transistor substrate including a thin-film transistor for controlling molecule alignment of the liquid crystal composition, and a color filter substrate including a color layer containing pixels of different colors. A blue pixel, which is one of the pixels of different colors, is larger in area than any of the pixels of other colors. A loss of light in a short-wavelength range is thus reduced.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: October 8, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yuka Utsumi, Yasushi Tomioka, Ikuo Hiyama
  • Patent number: 8552930
    Abstract: A liquid crystal display apparatus is able to display high quality motion pictures with less after-image when displaying motion pictures and with less fuzzy images without making the response speed of the liquid crystal too fast. The display data emphasized excessively more than a changed value is written into the pixel having any change detected by comparison with the previous display data and its value is made to change excessively more than the value corresponding to its original display data, and then, according to the optical response of the liquid crystal, the lighting time and the lighting period of the light source are controlled for the individual areas of the illumination unit having plural areas.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: October 8, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Tsunenori Yamamoto, Sukekazu Aratani, Makoto Yoneya