Patents Assigned to Hitachi Display, Ltd.
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Patent number: 8405308Abstract: 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: GrantFiled: June 21, 2011Date of Patent: March 26, 2013Assignees: Hitachi Displays, Ltd, Panasonic Liquid Crystal Display Co., Ltd.Inventors: Noriharu Matsudate, Hironori Toyoda
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Patent number: 8400584Abstract: 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: GrantFiled: February 13, 2009Date of Patent: March 19, 2013Assignees: Hitachi Displays, Ltd., Hitachi Display Devices, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventor: Masayuki Mifune
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Patent number: 8400440Abstract: 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: GrantFiled: September 24, 2007Date of Patent: March 19, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Yuuichi Takenaka, Takanori Nakayama
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Patent number: 8395730Abstract: 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: GrantFiled: September 6, 2012Date of Patent: March 12, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Takahiro Ochiai, Tohru Sasaki, Osamu Ito
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Patent number: 8395721Abstract: 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: GrantFiled: December 1, 2010Date of Patent: March 12, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventor: Eiji Oohira
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Patent number: 8395750Abstract: 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: GrantFiled: July 1, 2010Date of Patent: March 12, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Kotaro Araya, Shintaro Takeda, Yasushi Tomioka
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Patent number: 8390549Abstract: 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: GrantFiled: December 24, 2009Date of Patent: March 5, 2013Assignees: Hitachi Displays, Ltd., Canon Kabushiki KaishaInventors: Shingo Ishihara, Tsukuru Ohtoshi
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Patent number: 8390754Abstract: 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: GrantFiled: September 6, 2012Date of Patent: March 5, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Hirokazu Itakura, Hitoshi Komeno, Tomoaki Takahashi
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Patent number: 8390750Abstract: 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: GrantFiled: September 3, 2009Date of Patent: March 5, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventor: Kikuo Ono
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Patent number: 8384866Abstract: The present invention is directed to a VA-mode liquid crystal display panel wherein, by radiating light such as ultraviolet rays to a first alignment film, main chains in molecules of the alignment film are arranged to form a first slow axis. By also radiating the light to a second alignment film, a second slow axis is formed. The first slow axis and the second slow axis are arranged to cross each other. When an electric field is applied to a liquid crystal layer, liquid crystal molecules tilt in the direction which crosses the extending direction of projections formed on a substrate. The projections are formed such that the direction along which the liquid crystal molecules tilt and a first slow axis or a second slow axis differ from each other.Type: GrantFiled: November 6, 2007Date of Patent: February 26, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Chikae Matsui, Hidehiro Sonoda
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Patent number: 8384845Abstract: The side surface of the light guide plate includes an incident surface which faces the light source unit in an opposed manner, and a fixing surface which is directed in the left-and-right direction orthogonal to the top-and-bottom direction which is the direction along which the light source unit and the incident surface each other in an opposed manner. An engaging portion which is engageable with a lower frame is formed on the fixing surface or an edge portion which forms the fixing surface. The engaging portion is configured to allow a change of a distance between the incident surface and the lower frame due to expansion or shrinkage of the light guide plate while restricting the movement of the light guide plate in the top-and-bottom direction.Type: GrantFiled: January 24, 2011Date of Patent: February 26, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Yoshifumi Sekiguchi, Yoshiro Mikami, Ikuo Hiyama, Naoki Iwasaki, Masaki Tsubokura
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Patent number: 8384842Abstract: A display device which narrows a width of a frame thereof is provided. A display device includes a first substrate on which a plurality of switching elements is formed, a second substrate which is arranged to face the first substrate in an opposed manner, and a frame which is mounted on an outer peripheral portion of the first substrate by way of an adhesive layer. The adhesive layer and the frame each have an opening at a position corresponding to the plurality of switching elements formed on the first substrate, and an inner peripheral surface of the opening of the frame and an inner peripheral surface of the opening of the adhesive layer are made coplanar with each other.Type: GrantFiled: July 29, 2009Date of Patent: February 26, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Atsuo Nakagawa, Eiji Oohira
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Patent number: 8384850Abstract: 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: GrantFiled: September 6, 2012Date of Patent: February 26, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Yuka Kuwajima, Eiji Oohira
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Patent number: 8384836Abstract: 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: GrantFiled: July 1, 2010Date of Patent: February 26, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventor: Takeshi Sakai
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Patent number: 8384287Abstract: A high-definition organic EL display device which enhances utilization efficiency of a space within a pixel is provided. In an organic EL display device in which pixels each of which is constituted of an organic El element are arranged in a matrix array, the pixel includes a pixel circuit which is configured to control an electric current supplied to the organic El element, the pixel circuit includes a capacitance, and the capacitance is arranged on a boundary of the pixels arranged adjacent to each other in a longitudinal direction of the pixels. Further, one electrode which constitutes the capacitance is used in common by the pixels arranged adjacent to each other in the longitudinal direction, and another electrode which constitutes the capacitance is separated between the pixels arranged adjacent to each other in the longitudinal direction.Type: GrantFiled: October 28, 2008Date of Patent: February 26, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Naoki Tokuda, Hajime Akimoto
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Patent number: 8384858Abstract: A backlight source has a spectral distribution such that luminances of red and green light are stronger than luminance of blue light. A color filter includes a blue coloring layer that can best transmit a blue light, a red coloring layer that can best transmit a red light, a green coloring layer that can best transmit a green light, and a porous layer in which penetration holes are formed so as to penetrate therethrough in its thickness direction. The blue coloring layer is formed so as to be thicker than the red and green coloring layers. A liquid crystal layer is formed so as to be thinner in a portion facing the blue coloring layer than a portion facing the red and green coloring layers. The porous layer is formed from the same material and to have the same thickness as the blue coloring layer.Type: GrantFiled: November 3, 2010Date of Patent: February 26, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Kikuo Ono, Kazumi Kanesaka
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Patent number: 8384703Abstract: 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: GrantFiled: December 10, 2009Date of Patent: February 26, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Masahiro Maki, Hideo Sato, Hiroyuki Abe
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Patent number: 8384840Abstract: A liquid crystal display device includes a liquid crystal display panel on a mold, and a backlight placed in the mold. The backlight includes a light guide panel, an LED provided on a side surface of the liquid guide panel, and other components. A main flexible wiring substrate is attached to the liquid crystal display panel, and extends to a back surface of the mold. The LED is mounted on an LED flexible wiring substrate. At least one electronic component mounted on the main flexible wiring substrate is arranged on an end surface of the mold. Then, an insulating sheet is provided between the at least one electronic component and the LED to prevent short circuit between them, instead of using a partition wall for electrical insulation.Type: GrantFiled: December 9, 2010Date of Patent: February 26, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventor: Yasuyuki Mishima
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Patent number: 8384704Abstract: A liquid crystal display device which can reduce a scale of the whole counter-electrode-signal drive circuits is provided. The liquid crystal display device includes: a substrate; a plurality of counter electrodes which are formed on the substrate corresponding to pixels; a plurality of counter electrode signal lines which are formed on the substrate, are electrically made conductive with the counter electrodes, extend in the X direction, and are arranged parallel to each other in the Y direction which intersects the X direction; and counter electrode signal drive circuits having control signal outputting parts which are mounted on the substrate at a rate of one control signal outputting part for two counter electrode signal lines.Type: GrantFiled: December 10, 2009Date of Patent: February 26, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Masahiro Maki, Katsumi Matsumoto, Hideo Sato, Hiroyuki Abe
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Patent number: 8384647Abstract: In a driver circuit which controls the supply of charge to cells each of which can store a charge, the EMI (Electro Magnetic Interference) which occurs at the time of performing the charge sharing driving can be reduced. A preceding conduction means (SW13) which is controlled in response to a clock signal (CLK1) makes an output signal line corresponding to a first circuit which has positive polarity of a potential higher than a reference potential and an output signal line corresponding to a second circuit which has negative polarity of a potential lower than the reference potential electrically conductive with each other. After a lapse of a predetermined time, a succeeding conduction means (SW23) which is controlled in response to a clock signal (CLK2) makes an output signal line corresponding to a third circuit which has the positive polarity and an output signal line corresponding to a fourth circuit which has the negative polarity electrically conductive with each other.Type: GrantFiled: January 7, 2010Date of Patent: February 26, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Yasuhiko Yamagishi, Toshiki Misonou