Patents Assigned to Hitachi Displays, Ltd.
  • Patent number: 8416364
    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: Grant
    Filed: November 28, 2011
    Date of Patent: April 9, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Hiroshi Kurihara
  • Patent number: 8416178
    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: Grant
    Filed: September 23, 2011
    Date of Patent: April 9, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yasuhiro Tanaka, Hironobu Isami, Haruhisa Iida, Hidenori Kikuchi, Yukihide Ode
  • Patent number: 8416356
    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: Grant
    Filed: January 16, 2009
    Date of Patent: April 9, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hitoshi Azuma, Susumu Sasaki, Tomio Yaguchi, Takao Ebine, Katsuyuu Takahashi, Shoichi Uchino, Akiko Iwata
  • Patent number: 8416202
    Abstract: The present invention realizes the reduction of cost of a display device having a touch panel. The display device having a touch panel includes a display panel, and a touch panel which is arranged on the display panel in an overlapping manner in plane. The touch panel includes a first substrate and a second substrate which are arranged to face each other with spacers sandwiched therebetween, and a first semiconductor chip which is mounted on the first substrate.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: April 9, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hajime Akimoto, Yasuharu Yatsu, Hiroshi Kageyama, Noriharu Matsudate, Naruhiko Kasai
  • Patent number: 8411241
    Abstract: A liquid crystal display device includes a first substrate and a second substrate. The first substrate includes a sheet-like first electrode formed of a transparent conductive film, a first insulator formed to cover the sheet-like first electrode, a plurality of linear second electrodes formed by a transparent conductive film on the first insulator so as to overlap the sheet-like first electrode, and a second insulator formed on the first insulator so as to cover the plurality of linear second electrodes. The first substrate and the second substrate interpose liquid crystal therebetween and are arranged to be opposed to each other. The sheet-like first electrode, the first insulator, and the plurality of linear second electrodes are provided in a pixel region on a surface of the first substrate of a side of the liquid crystal. The second insulator is made of the same material as the first insulator.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: April 2, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takeshi Sato, Shinichiro Oka, Yoshiaki Toyota
  • Patent number: 8409891
    Abstract: A display device in which a plurality of gate wires and a plurality of drain wires that intersect the gate wires are provided, and thin film transistors connected to the gate wires and the drain wires are formed for respective pixel regions. At least one of the gate wires, the drain wires, and lead wires drawn from the gate wires or the drain wires is formed of a light-transmitting patterned conductive film. The light-transmitting patterned conductive film is formed of at least a first light-transmitting patterned conductive film, and a second light-transmitting patterned conductive film laminated on the first light-transmitting patterned conductive film. The second light-transmitting patterned conductive film is formed of a conductive film for coating only the surface of the first light-transmitting patterned conductive film including its side wall surface.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: April 2, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takeshi Kuriyagawa, Jun Fujiyoshi
  • Patent number: 8405308
    Abstract: The strength of the whole OLED is increased by proposing a new method of fixing OLED panels. To address the problem, an OLED element is formed on a substrate, and a sealing substrate of a structure by which the substrate is sealed is fixed to a lower metallic frame via an elastic sheet. Silicon resin is preferably used as the sheet, and use of a sheet having a heat diffusion function based on radiation is more desirable.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: March 26, 2013
    Assignees: Hitachi Displays, Ltd, Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Noriharu Matsudate, Hironori Toyoda
  • Patent number: 8405813
    Abstract: A liquid crystal display device with a pair of substrates which are arranged to face each other with liquid crystal therebetween, columnar spacers having the substantially equal height formed on a liquid-crystal-side surface of one substrate, and the columnar spacers include the columnar spacer which is contact with a liquid-crystal-side surface of another substrate and the columnar spacer which is not contact with the liquid-crystal-side surface of another substrate.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: March 26, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Keiichiro Ashizawa, Mitsuo Nakatani, Hiroaki Miwa, Takao Tanaka, Sadafumi Hirai, Shinichi Kawabe, Makoto Sasaki, Kazuyuki Ito, Masahiro Ieda
  • Patent number: 8404125
    Abstract: In a metal processing method, a photoresist liquid is applied to both surfaces of a metal plate (210) to form photoresist films (220, 230), respectively (Step S102). Subsequently, the photoresist films (220, 230) are exposed and developed so that the photoresist films (220, 230) is removed while leaving the photoresist films (220, 230) corresponding to portions in which a hole is to be formed (Step S103). Next, metal thin films (240, 250) are formed on both the surfaces of the metal plate (210), respectively, on which the photoresist films (220, 230) are formed (Step S104). Subsequently, the photoresist films (220, 230) are removed, and metal thin films (245, 255) are also removed, which are formed on the photoresist films (220, 230), respectively (Step S105). Finally, the metal plate (210) is immersed in an etchant to be etched, to thereby form a high-precision hole in the metal plate (210) (Step S106).
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: March 26, 2013
    Assignees: Hitachi Displays, Ltd., Canon Kabushiki Kaisha
    Inventors: Noriharu Matsudate, Takeshi Ookawara
  • Patent number: 8400584
    Abstract: A backlight which arranges light emitting diodes on a side surface of light guide plate adopts the structure which allows the easy removal of the light guide plate from a mold and makes it difficult for a stress or the like to influence the fine structure of a light incident portion of the light guide plate. In a liquid crystal display device having a backlight which radiates light to a liquid crystal panel, LEDs which constitute a light emitting element are mounted on a light guide plate which is mounted on a backlight, and edge portions of the light guide plate are tapered such that a width of the light guide plate is increased in the removal direction of the side surface of the light guide plate. Further, an ejector-pin mark is formed on a lower surface of the light guide plate by pushing an ejector pin in the removal direction of the light guide plate.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: March 19, 2013
    Assignees: Hitachi Displays, Ltd., Hitachi Display Devices, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Masayuki Mifune
  • Patent number: 8400440
    Abstract: A display device includes a substrate, a display region having pixels on the substrate, a drive circuit element mounted on a peripheral portion of the substrate, a plurality of terminal portions formed on the peripheral portion and arranged on a mounting portion of the drive circuit element, and a plurality of wiring lines prolonged from the terminal portions to the outside of the mounting portion of the substrate. The terminal parts are arranged to two lines of the plurality of wiring lines along one end of the mounting portion, a plurality of bumps connected to each of the terminal portions by an anisotropic conductive film are formed on the plane facing the terminal portion of the drive circuit element, a part of the plurality bumps include a first bump and a second bump which is adjoined close to the first bump.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: March 19, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yuuichi Takenaka, Takanori Nakayama
  • Patent number: 8395730
    Abstract: A liquid crystal display device includes a first substrate and a second substrate, liquid crystal sandwiched between the first substrate and the second substrate, a first red color filter, a green color filter, a blue color filter, a second red color filter disposed between the first substrate and the second substrate, and arranged in a first direction, a first light blocking film disposed between the first red color filter and the green color filter, a second light blocking film disposed between the green color filter and the blue color filter, and a third light blocking film disposed between the blue color filter and the second red color filter, and drain signal lines, thin film transistors, and pixel electrodes formed on the first substrate. Drain electrodes of the thin film transistors are connected to drain signal lines, and source electrodes of the thin film transistors are connected to the pixel electrodes.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: March 12, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takahiro Ochiai, Tohru Sasaki, Osamu Ito
  • Patent number: 8395721
    Abstract: A metal frame includes a first base portion and a first wall portion rising from the first base portion at a position excluding sections of a peripheral edge portion of the first base portion. A resin frame includes a second base portion arranged so as to extend from a region on a central side of the first wall portion of the first base portion to the plurality of sections of the peripheral edge portion, and a second wall portion rising from the second base portion above the plurality of sections. A liquid crystal display panel is supported on an upper surface of the second base portion of the resin frame. A peripheral edge of the liquid crystal display panel is positioned above the first wall portion. The second wall portion of the resin frame is positioned outside the peripheral edge of the liquid crystal display panel.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: March 12, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Eiji Oohira
  • Patent number: 8395750
    Abstract: There is provided a liquid crystal device that exhibits excellent response properties over a wide temperature range even when the weight percentage of the polymerizable monomer used for generating polymers is decreased. The liquid crystal device according to the present invention is a liquid crystal device which includes a first substrate and a second substrate, at least one of which has an electrode group formed thereon for driving liquid crystals; and a liquid crystal layer sandwiched between the first substrate and the second substrate, in which the liquid crystal layer contains a polymer which is eccentrically distributed on at least one substrate side among the first substrate and the second substrate.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: March 12, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Kotaro Araya, Shintaro Takeda, Yasushi Tomioka
  • Patent number: 8390750
    Abstract: In a liquid crystal display device where pixel electrodes and counter electrodes are arranged on one substrate in a stacked manner by way of an insulation layer, it is possible to lower a drive voltage while maintaining optical transmissivity. Pixels each of which includes a first pixel electrode, a second pixel electrode and a counter electrode are arranged on a substrate in a matrix array. A first pixel electrode and a second pixel electrode in one pixel include a plurality of comb-teeth portions respectively. The first pixel electrode and the second pixel electrode are alternately arranged on the same layer in an opposed manner with a gap defined between the comb-teeth portion of the first pixel electrode and the comb-teeth portion of the second pixel electrode. The first and second pixel electrodes and the counter electrode are arranged in a stacked manner with an insulation layer sandwiched therebetween.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: March 5, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Kikuo Ono
  • Patent number: 8390549
    Abstract: Organic luminescent elements forming an R sub-pixel, a G sub-pixel, and a B sub-pixel are formed of lower electrodes (3, 4, and 5), hole-transporting layers (7, 8, and 11), luminescent layers (9, 12, and 14), electron-transporting layers (10, 13, and 15), and an upper electrode (16), and each of the organic luminescent elements optimizes an optical interference condition. A dielectric alternate laminated film (17) is formed on the upper electrode (16), and forms a micro-resonator with each of the lower electrodes. The micro-resonator structure raises the directivity of a radiation pattern, and improves the light extraction efficiency of each of the organic luminescent elements. A narrow radiation pattern is alleviated by a view angle-controlling layer (19) formed on the dielectric alternate laminated film (17) so as to broaden until a perfectly diffusing surface radiation pattern. Consequently, the light extraction efficiency can be improved in an organic luminescent display device.
    Type: Grant
    Filed: December 24, 2009
    Date of Patent: March 5, 2013
    Assignees: Hitachi Displays, Ltd., Canon Kabushiki Kaisha
    Inventors: Shingo Ishihara, Tsukuru Ohtoshi
  • Patent number: 8390754
    Abstract: A display device includes a substrate, a display region having a pixel switch, a pixel electrode which is connected to the pixel switch, and a transparent common electrode formed over the substrate, a peripheral region having a gate signal line which is connected to the pixel switch, and a common connection line which is connected to the transparent common electrode, an insulating layer which is disposed on the gate signal line and the common connection line, a conductive layer which is disposed on the insulating layer and crosses the gate signal line and crosses the common connection line in the peripheral region, a first semiconductor film which is disposed between the insulating layer and the conductive layer, and a second semiconductor film which is disposed between the insulating layer and the conductive layer and is separated from the first semiconductor film.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: March 5, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hirokazu Itakura, Hitoshi Komeno, Tomoaki Takahashi
  • Patent number: 8384703
    Abstract: In a liquid crystal display device which arranges a drive circuit on left and right sides of a display region in a two-split manner, flickering at an edge of a screen can be reduced. In a liquid crystal display device which arranges first and second counter electrode drive circuits on left and right sides of a display region respectively, during an arbitrary 1 frame period, a first counter electrode signal drive circuit 3L applies a first voltage to at least one counter electrode signal line portion CX1, CX3, . . . CXn?1 and a second voltage different from the first voltage to at least one counter electrode signal line portion CX1, CX3, . . . CXn?1, and a second counter electrode signal drive circuit 3R applies the first voltage to at least one counter electrode signal line portion CX2, CX4, . . . CXn and the second voltage to at least one counter electrode signal line portion CX2, CX4, . . . CXn.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: February 26, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Masahiro Maki, Hideo Sato, Hiroyuki Abe
  • Patent number: 8384850
    Abstract: The first line and the plurality of second lines are formed on the light-emitting diode substrate and on the connection substrate. The plurality of second lines are arranged, on the connection substrate, in the same direction as a direction in which the plurality of light-emitting diodes mounted on the light-emitting diode substrate are arranged. The first line is formed outside the plurality of second lines, on the connection substrate. The plurality of second lines are formed without intersecting with one another, on the light-emitting diode substrate. The first line is formed, on the light-emitting diode substrate, so that the first line extends along with a periphery of the light-emitting diode substrate from a connection part with respect to the connection substrate so as to come around to an opposite side of the connection part with respect to the connection substrate.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: February 26, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yuka Kuwajima, Eiji Oohira
  • Patent number: 8384836
    Abstract: A liquid crystal display device having thin film transistors which can alleviate the required alignment accuracy of a semiconductor film while suppressing the generation of an optical leak current is provided.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: February 26, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Takeshi Sakai