Patents Assigned to Hitachi Display, Ltd.
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Patent number: 8570302Abstract: 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: GrantFiled: June 6, 2008Date of Patent: October 29, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Teruaki Saito, Hideo Sato, Shigeyuki Nishitani
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Patent number: 8564752Abstract: 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: GrantFiled: March 14, 2013Date of Patent: October 22, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Co., Ltd.Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
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Patent number: 8564550Abstract: 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: GrantFiled: August 4, 2009Date of Patent: October 22, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventor: Shinya Hashimoto
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Patent number: 8563982Abstract: 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: GrantFiled: December 6, 2011Date of Patent: October 22, 2013Assignee: Hitachi Displays, Ltd.Inventors: Takao Nakamura, Kazuki Ishii, Daisuke Mutou, Hidenori Seki
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Patent number: 8558965Abstract: 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: GrantFiled: April 13, 2012Date of Patent: October 15, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventor: Koichi Fukuda
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Patent number: 8558779Abstract: 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: GrantFiled: July 24, 2012Date of Patent: October 15, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Hideo Sato, Shigeyuki Nishitani, Takayuki Nakao, Masahiro Maki
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Patent number: 8558968Abstract: 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: GrantFiled: February 17, 2011Date of Patent: October 15, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventor: Eiji Oohira
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Patent number: 8558267Abstract: 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: GrantFiled: August 22, 2012Date of Patent: October 15, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Kazuhiko Kai, Masahiro Tanaka, Yoshinori Ishii
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Patent number: 8558979Abstract: 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: GrantFiled: November 15, 2011Date of Patent: October 15, 2013Assignee: Hitachi Displays, Ltd.Inventor: Hirotaka Imayama
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Patent number: 8558449Abstract: 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: GrantFiled: May 22, 2012Date of Patent: October 15, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Masaya Adachi, Kazutaka Tsuji, Hajime Murakami, Etsuko Nishimura
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Patent number: 8552930Abstract: 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: GrantFiled: December 16, 2003Date of Patent: October 8, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Tsunenori Yamamoto, Sukekazu Aratani, Makoto Yoneya
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Patent number: 8553191Abstract: The present invention seeks to decrease the number of pixel defects in an IPS liquid crystal display device. A gate electrode is formed on a TFT substrate, while a gate insulating film is overlaid on the gate electrode. A pixel electrode which is divided into segments is formed on the gate insulating film. The segments of the pixel electrode are normally interconnected by a source electrode. An inter-layer insulating film, on which a common electrode including slits is formed, is overlaid on the pixel electrode. In a case where the common electrode and one of the segments of the pixel electrode are conductively interconnected by a conductive foreign substance, the other segments of the pixel electrode are allowed to operate by disconnecting the conducted segment of the pixel electrode from the source electrode. Thus, one pixel is prevented from lapsing into a full pixel defect.Type: GrantFiled: November 15, 2011Date of Patent: October 8, 2013Assignee: Hitachi Displays, Ltd.Inventor: Takahiro Nagami
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Patent number: 8553179Abstract: 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: GrantFiled: June 21, 2010Date of Patent: October 8, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Yuka Utsumi, Yasushi Tomioka, Ikuo Hiyama
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Patent number: 8552973Abstract: 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: GrantFiled: October 16, 2008Date of Patent: October 8, 2013Assignees: Hitachi Displays Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventor: Kikuo Ono
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Patent number: 8547494Abstract: 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: GrantFiled: March 4, 2013Date of Patent: October 1, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Hirokazu Itakura, Hitoshi Komeno, Tomoaki Takahashi
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Patent number: 8546812Abstract: 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: GrantFiled: May 21, 2012Date of Patent: October 1, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventor: Syou Yanagisawa
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Patent number: 8547514Abstract: 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: GrantFiled: November 15, 2011Date of Patent: October 1, 2013Assignee: Hitachi Displays, Ltd.Inventors: Tomokazu Ishikawa, Osamu Nagashima
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Patent number: 8547318Abstract: 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: GrantFiled: January 8, 2013Date of Patent: October 1, 2013Assignees: 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
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Patent number: 8547306Abstract: 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: GrantFiled: February 16, 2010Date of Patent: October 1, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Masahiro Tanaka, Toshiyuki Matsuura, Hajime Murakami, Hajime Akimoto
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Publication number: 20130250218Abstract: 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: ApplicationFiled: May 24, 2013Publication date: September 26, 2013Applicant: Hitachi Displays, Ltd.Inventors: Koichi IGETA, Toshiki ASAKURA