Patents Assigned to Display Technologies
  • Publication number: 20080111773
    Abstract: An active matrix display device using an organic light-emitting element has a pixel having the organic light-emitting element; a driving transistor that determines an electric current flowing to the organic light-emitting element according to a gate voltage; a storing unit; and a voltage output unit that supplies a voltage to the pixel, wherein a voltage output from the voltage output unit varies depending on data in the storing unit.
    Type: Application
    Filed: November 9, 2007
    Publication date: May 15, 2008
    Applicant: Toshiba Matsushita Display Technology
    Inventor: HITOSHI TSUGE
  • Patent number: 7372440
    Abstract: An active matrix display device comprises a plurality of pixels which are arranged in the form of a matrix on a substrate and each of which includes a display element and a pixel circuit which supplies the display element with a drive current, video signal lines arranged along the pixels, and a video signal driver which, after the supply of base currents to the video signal lines, supplies the pixels with gradation currents through the video signal lines. The pixel circuit includes a pixel switch which controls whether or not to select the pixel, stores the difference current between the gradation and base currents when the pixel is selected and outputs the stored difference current to the display element as the drive current when the pixel is nonselected.
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: May 13, 2008
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Masuyuki Ota, Yoshiro Aoki
  • Patent number: 7367706
    Abstract: A liquid crystal display device according to the present invention has a lighting unit (UT) comprising a light guiding plate (3), a light source (2), a reflector (4), a reflecting sheet (5) and a housing (10), and a liquid crystal display panel (1). In the liquid crystal display device, increase in temperature of the light source (2) is prevented by providing an opening portion (S1) on the housing (10) such that the opening portion (S1) reaches the reflector (4). In the liquid crystal display device, light emission intensity of the lighting unit (UT) is not lowered during operation of the device, and further, a lifetime of the light source (2) is not shortened.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: May 6, 2008
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventor: Toshihiko Ura
  • Patent number: 7367374
    Abstract: The present invention is directed to a display device that overcomes the limitation on tact time, and the defective phenomenon attributed to the generation of bubbles, pasting and visual irregularities at the time of laminating a film to a display panel. A polarizer is positioned in parallel to the vicinity of a main surface of a liquid crystal cell by holding two portions of the polarizer at suction stages. A portion of the polarizer is pushed and brought into contact with the main surface of the liquid crystal cell. From the portion of the polarizer, the polarizer is pushed to the main surface toward one end of the main surface along a first direction thereof. The polarizer is pushed to the main surface of the liquid crystal cell toward another end of the main surface in the first direction so as to laminate the polarizer to the main surface.
    Type: Grant
    Filed: November 23, 2004
    Date of Patent: May 6, 2008
    Assignees: Hitachi Displays, Ltd., Hitachi Display Devices, Ltd., Hitachi Display Technologies, Ltd.
    Inventors: Toshiyuki Amimoto, Tetsuya Takei, Toshihiko Saitou, Tetsuo Matsuzaki
  • Patent number: 7369209
    Abstract: A display apparatus with a plurality of display pixel sections includes glass substrate, which are formed to have a thickness that permits bending of the display apparatus, and polarizer plates, which are disposed on the glass substrates, respectively. The polarizer plates are thicker than the glass substrates.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: May 6, 2008
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Masaki Kinoshita, Kenji Kawamata, Satoru Yamanaka, Hiroyuki Kurisu, Tatsuya Miyazaki, Yasushi Kawata
  • Publication number: 20080100599
    Abstract: An object of the present invention is to provide a flat display device which achieves an excellent and stable display even when the periodicity of voltage polarity is switched at the beginning of a frame at the time of driving a signal line while providing a periodicity of every M scanning lines to the voltage polarity of signal lines in each frame. A control circuit 22 controls so as to provide a voltage polarity of the final line in the periodicity of every four scanning lines to a signal line prior to driving a signal line corresponding to the first scanning line Y(1) at the beginning of a frame.
    Type: Application
    Filed: January 10, 2007
    Publication date: May 1, 2008
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventor: Kouhei Kinoshita
  • Patent number: 7365141
    Abstract: Optical devices fabricated from solvent processible polymers suffer from susceptibility to solvents and morphological changes. A semiconductive polymer capable of luminescence in an optical device is provided. The polymer comprises a luminescent film-forming solvent processible polymer which contains cross-linking so as to increase its molar mass and to resist solvent dissolution, the cross-linking being such that the polymer retains semiconductive and luminescent properties.
    Type: Grant
    Filed: March 13, 2006
    Date of Patent: April 29, 2008
    Assignee: Cambridge Display Technology Ltd.
    Inventors: Andrew Bruce Holmes, Xiao-Chang Li, Stephen Carl Moratti, Kenneth Andrew Murray, Richard Henry Friend
  • Patent number: 7361947
    Abstract: A photoelectric conversion element includes a semiconductor layer including a pair of p+ regions in which p-type impurities are doped, and a p? region which is disposed between the p+ regions and has a lower p-type impurity concentration than the p+ regions. A gate electrode is formed over the p? region via a gate insulation film, thus, a p-MOS structure is formed. A width of the gate electrode is less than a width of the p? region. A p? region, which is a portion of the p? region and is located immediately below the gate electrode, forms a light receiving layer, and p? regions, which are portions of the p? region and are located away from below the gate electrode, form LDD regions. The photoelectric conversion element is fabricated on the same substrate as a thin-film transistor for a driving circuit, thereby constructing a display device with an input function.
    Type: Grant
    Filed: December 27, 2005
    Date of Patent: April 22, 2008
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventor: Norio Tada
  • Publication number: 20080084365
    Abstract: A switching transistor is controlled to turn on or off depending on a turn-on voltage or a turn-off voltage applied to a gate signal line. A driver transistor is supplied with an image signal applied to a source signal line through a switching transistor. A voltage based on the supplied image signal is retained by a capacitor. The driver transistor supplies a light-emitting current to an EL element based on the voltage retained in the capacitor. A capacitor is formed between one terminal of the capacitor (that is, a gate terminal of the driver transistor) and a gate signal line. The capacitor causes the gate terminal voltage of the driver transistor to be varied depending on variation of the potential on the gate signal line.
    Type: Application
    Filed: October 2, 2007
    Publication date: April 10, 2008
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Hiroshi TAKAHARA, Hitoshi Tsuge
  • Patent number: 7355220
    Abstract: An array substrate includes an insulating substrate, pixel circuits arranged in a matrix on the insulating substrate, and video signal lines arranged correspondently with columns which the pixel circuits form. Each pixel circuit includes a drive transistor whose source is connected to a power supply terminal, a pixel electrode, an output control switch connected between a drain of the drive transistor and the pixel electrode, a selector switch connected between the drain and the video signal line, a diode-connecting switch including switching elements connected in series between the drain and a gate of the drive transistor, a first capacitor including an electrode connected to the gate, and a second capacitor including an electrode to which two of the switching elements are connected in parallel.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: April 8, 2008
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Kazuyoshi Omata, Makoto Shibusawa
  • Publication number: 20080079355
    Abstract: An organic electroluminescent device comprising: a substrate; a first electrode disposed over the substrate for injecting charge of a first polarity into an organic light emitting layer; a second electrode disposed over the first electrode for injecting charge of a second polarity opposite to said first polarity into an light emitting layer; an organic light emitting layer disposed between the first and the second electrodes forming a pixel array having a pixel pitch P; and an encapsulant disposed over the second electrode, wherein the second electrode is transparent to light emitted by the organic light emitting layer and an optical structure is provided in the encapsulant, said second electrode and said encapsulant being of a whereby the optical structure is a distance D from the light emitting layer, the distance D being less than half the pixel pitch P.
    Type: Application
    Filed: December 2, 2005
    Publication date: April 3, 2008
    Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED
    Inventor: Euan Smith
  • Patent number: 7351788
    Abstract: A method for making a polymer containing a first repeat unit having formula: —Ar—N(R)—Ar(N(R?)—Ar)x— which may be substituted or unsubstituted where x or 0 or 1; each Ar is the same or different and independently is a substituted or unsubstituted aryl or heteroaryl group and R and R? each is hydrogen or a substituent group and a second repeat unit that is the same or different from the first repeat unit and comprises a substituted or unsubstituted, aryl or heteroaryl group.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: April 1, 2008
    Assignee: Cambridge Display Technology Limited
    Inventors: Richard O'Dell, Carl Towns
  • Patent number: 7348428
    Abstract: Monomers having the formula X1—Ar1-[triarylamine]—Ar2-X2 wherein the triarylamine unit comprises at least one nitrogen atom in the backbone of the monomer and at least three substituted or unsubstituted aryl or heteroaryl groups and wherein X1 and X2 are the same or different polymerizable groups and wherein Ar1 and Ar2 are the same or different substituted or unsubstituted aryl or heteroaryl groups. Polymers and copolymers comprising such monomers are also described. The polymers have particular application in organic optoelectronic devices such as organic electroluminescent devices and organic photovoltaic devices.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: March 25, 2008
    Assignee: Cambridge Display Technology Limited
    Inventors: Richard O'Dell, Carl Towns, Mary McKiernan
  • Publication number: 20080068554
    Abstract: The step of putting drops of liquid crystal onto a substrate includes the putting of drops of liquid crystal onto the substrate at spaced intervals of 15 mm or less. Thus, an impurity concentration is made equal to or less than 30 ppm in a region in which the liquid crystals collide with each other when the bonding of the substrates causes diffusion of the liquid crystals through a liquid crystal cell. A liquid crystal dripping apparatus including a branch nozzle having a plurality of discharge openings is used in the step of putting drops of liquid crystal onto the substrate. By a single dispensing operation, the apparatus simultaneously puts drops of liquid crystal onto a plurality of spots on the substrate.
    Type: Application
    Filed: November 7, 2007
    Publication date: March 20, 2008
    Applicants: Fujitsu Display Technologies Corporation, AU Optronics Corporation
    Inventor: Minoru Otani
  • Patent number: 7344293
    Abstract: A planar light source device includes a cold cathode fluorescent tube, a light guide opposed to the light source to emit light which is received from the light source, a frame which supports the light source and the light guide and has a projection which positions the light source and the light guide, and an optical sheet which provides an optical property for light radiated from the light source and has a regulation section that regulates contact between the light guide and the projection of the frame, the regulation section being located between the light guide and the projection.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: March 18, 2008
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventor: Yukio Oami
  • Publication number: 20080061294
    Abstract: A thin-film transistor substrate includes a pixel region where gate electrode lines are arranged on an insulating substrate sandwiching semiconductor layer patterns and a gate insulator with the insulating substrate, wherein shapes of the semiconductor patterns and the gate electrode lines are set so that a value of K obtained by the following equation is smaller than a first set value when the thin-film transistor substrate is mounted on a metal table: K=(L/Ce)×{Ca/(Ca+Cb)}×S where Ca represents a capacitor between each of the semiconductor layer patterns and the metal table, Cb represents a capacitor between each of the semiconductor layer patterns and the gate electrode lines, Ce represents a capacitor between each of the gate electrode lines and the metal table, L represents a length of each of the gate electrode line, and S represents a substrate surface area that one of the gate electrode lines are in charge of per unit length.
    Type: Application
    Filed: November 8, 2007
    Publication date: March 13, 2008
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Tetsuya Kawamura, Katsuhiko Inada
  • Publication number: 20080053520
    Abstract: A luminescent polymer comprising a triarylene repeat unit which comprises a triarylene of general formula (I) which is substituted or unsubstituted and an arylene repeat unit -[-Ar-]- that is different from the triarylene repeat unit wherein X, Y, and Z are each independently O, S, CR2, SiR2 or NR and each R is independently alkyl, aryl or H.
    Type: Application
    Filed: October 15, 2007
    Publication date: March 6, 2008
    Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED
    Inventors: Carl TOWNS, Richard O'DELL
  • Publication number: 20080055524
    Abstract: Provided is a liquid crystal display device that makes it possible to prevent coating unevenness of a colored layer from occurring. The liquid crystal display device includes a first colored layer, a second colored layer and a third colored layer, which layers are formed in a display area. In the liquid crystal display device, the first colored layer is arranged in a grid pattern in a manner of surrounding the second colored layer and the third colored layer. In addition, when (n, m) denotes the coordinates of a pixel having a grid square formed therein in the display area, grid squares are omitted in at least pixels of (n?1, m?1), (n?1, m+1), (n+1, m?1) and (n+1, m+1).
    Type: Application
    Filed: July 16, 2007
    Publication date: March 6, 2008
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Atsuyuki Manabe, Hideyuki Takahashi, Kiyoshi Shohara, Hiroharu Inoue, Tetsuyuki Yamada
  • Patent number: 7339646
    Abstract: A liquid crystal display device of the present invention comprises a liquid crystal display panel (1) provided with one or more electrode terminals (R1) to (Rn) and a pair of reference markers (N1) on a non-display region (3) thereof, a flexible printed circuit board (FPC1) provided with alignment markers (M2) corresponding to the reference markers, and a printed circuit board (PCB1) having one or more electrode terminals (T1) to (Tn), the reference markers being located inward relative to the alignment markers and the electrode terminals of the liquid crystal display panel and the electrode terminals of the printed circuit board being connected to each other through wiring (P1) to (Pn) of the flexible printed circuit board, wherein the alignment markers are elongated holes having long axes at least in one direction.
    Type: Grant
    Filed: October 28, 2002
    Date of Patent: March 4, 2008
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Mamoru Izawa, Tsuyoshi Ishigame
  • Patent number: 7335914
    Abstract: Each pixel of a display includes a first thin film transistor whose source is connected to a first power supply terminal, a second thin film transistor which is different in conduction type from the first thin film transistor and whose source and drain are connected to the drain of the first thin film transistor and the first power supply terminal, respectively, an output control switch, and a display element connected in series with the output control switch between a second power supply terminal and the drain of the first thin film transistor.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: February 26, 2008
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventor: Makoto Shibusawa