Patents by Inventor Hiroshi Kageyama

Hiroshi Kageyama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20090224665
    Abstract: The present invention provides an organic EL display device which imparts the flexibility to the pull-around operation of lines. The organic EL display device is characterized in that the display device includes a display part and a display drive circuit which is formed on a periphery of the display part on a surface of a substrate, wherein the display part includes a plurality of pixels driven by the display drive circuit, each one of the pixels is formed of a stacked body which is constituted of at least one electrode, a light emitting layer and another electrode stacked from the substrate side, another electrodes of respective pixels are electrically connected in common, and a conductive layer which is formed on the same layer and is made of the same material as another electrodes is formed on a region other than the display region in a state that the conductive layer is electrically separated from another electrodes.
    Type: Application
    Filed: May 12, 2009
    Publication date: September 10, 2009
    Inventors: Naoki TOKUDA, Toshihiro SATO, Hajime AKIMOTO, Hiroshi KAGEYAMA
  • Publication number: 20090201267
    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: Application
    Filed: February 11, 2009
    Publication date: August 13, 2009
    Inventors: Hajime Akimoto, Yasuharu Yatsu, Hiroshi Kageyama, Noriharu Matsudate, Naruhiko Kasai
  • Publication number: 20090197529
    Abstract: A communication system by electrostatic coupling and electromagnetic induction includes: a first transmission part (3a) and a first reception part (3b) which exchange data therebetween through non-contact communication using electrostatic coupling; a second transmission part (4a) and a second reception part (4b) which exchange data therebetween through non-contact communication using electromagnetic induction; and an image display device (8) which displays an image based on the data thus received. With this configuration, it is possible to make communication performed by the first transmission part (3a) and the first reception part (3b) communication with higher speed, larger volume, and higher reliability.
    Type: Application
    Filed: January 22, 2009
    Publication date: August 6, 2009
    Inventors: Ken Takei, Futoshi Furuta, Hiroshi Kageyama
  • Publication number: 20090184950
    Abstract: Provided is a capacitor coupling type power transmission circuit in which a variation in receiving side voltage due to a variation in capacitance is suppressed to prevent an influence on a variation in load current in a display panel. An insulating board of the display panel is sandwiched by capacitive coupling electrodes formed on each of a transmitting side board and a board of the display panel, thereby forming capacitors. A non-contact transmission is performed by the capacitors. An alternating current voltage signal obtained by electrodes on a display panel side is rectified by a rectifier including diodes. A constant voltage circuit which is a shunt regulator including a diode array in which a resistor and a plurality of diodes are connected in series is provided to maintain a stabilized voltage irrespective of a variation in load in the display panel.
    Type: Application
    Filed: January 21, 2009
    Publication date: July 23, 2009
    Inventors: Futoshi Furuta, Hiroshi Kageyama, Ken Takei
  • Publication number: 20090160829
    Abstract: To realize a random number generating circuit that is optimum for a liquid crystal display device that is used in a terminal device that includes a display/input component. A liquid crystal display device includes a liquid crystal display panel, a control circuit and a random number generating circuit, the random number generating circuit comprises plural shift registers, an output circuit and a register that stores an initial value, and the random number generating circuit is equipped with plural initial values, whereby the randomness of the random numbers is improved. Further, it becomes possible to increase and output frequencies by the output circuit because it is possible to output respectively different random numbers from the plural shift registers.
    Type: Application
    Filed: December 17, 2008
    Publication date: June 25, 2009
    Inventors: Noboru Kataoka, Fumiaki Komori, Takashi Watanabe, Futoshi Furuta, Hiroshi Kageyama
  • Patent number: 7550918
    Abstract: The present invention provides an organic EL display device which imparts the flexibility to the pull-around operation of lines. The organic EL display device is characterized in that the display device includes a display part and a display drive circuit which is formed on a periphery of the display part on a surface of a substrate, wherein the display part includes a plurality of pixels driven by the display drive circuit, each one of the pixels is formed of a stacked body which is constituted of at least one electrode, a light emitting layer and another electrode stacked from the substrate side, another electrodes of respective pixels are electrically connected in common, and a conductive layer which is formed on the same layer and is made of the same material as another electrodes is formed on a region other than the display region in a state that the conductive layer is electrically separated from another electrodes.
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: June 23, 2009
    Assignee: Hitachi Displays, Ltd.
    Inventors: Naoki Tokuda, Toshihiro Sato, Hajime Akimoto, Hiroshi Kageyama
  • Publication number: 20090153445
    Abstract: A capacitive coupling-type transmitting and receiving circuit for information signal is provided in which attenuation of a signal on a non-contact transmission path via a capacitor and a change of voltage on the receiving side due to a slight change in capacitance are suppressed, modulation and demodulation processes of signals are unnecessary, and non-contact transmission which does not depend on the transmission rate is enabled. The capacitor is formed with a transmitting electrode on a transmission board and a receiving electrode on a display panel board, and an insulating member is interposed between the electrodes. The transmitting board comprises a transmission signal processing circuit which converts display data from an external signal source into a voltage signal. The display panel board comprises an impedance converter circuit and a reception signal processing circuit.
    Type: Application
    Filed: December 12, 2008
    Publication date: June 18, 2009
    Inventors: Futoshi Furuta, Hiroshi Kageyama, Ken Takei
  • Publication number: 20090146928
    Abstract: Before a reset operation in which a threshold voltage Vth of an organic light emitting diode (OLED) driving thin film transistor (TFT) is compensated is performed by a first reset TFT switch, a second reset TFT switch is turned on to apply a reset reference potential to a gate of the OLED driving TFT. Accordingly, an operation point of the OLED driving TFT can be stably set even when a power supply is low. In the reset operation, it is unnecessary to close a lighting TFT switch and cause an OLED element to emit light, whereby constant can be improved.
    Type: Application
    Filed: December 10, 2008
    Publication date: June 11, 2009
    Inventors: Mitsuhide Miyamoto, Tohru Kohno, Hajime Akimoto, Hiroshi Kageyama
  • Publication number: 20090131557
    Abstract: A shape memory resin of the present invention contains a network polymer and a thermoplastic polymer, and the thermoplastic polymer is dissolved in the network polymer. The shape memory resin of the present invention can be produced by a simple process of simply dissolving the thermoplastic polymer in a network polymer precursor and cross-linking this network polymer precursor. In the present invention, an epoxy compound is preferably used as the network polymer precursor.
    Type: Application
    Filed: April 26, 2007
    Publication date: May 21, 2009
    Inventors: Hiroshi Uyama, Hiroshi Kageyama, Takashi Tsujimoto
  • Publication number: 20090109149
    Abstract: An image display device having a plurality of pixel, a plurality of signal lines for inputting an image voltage to each of the plurality of pixels, and a pixel selecting unit for selecting from the plurality of pixels a pixel into which the image voltage is to be written, in which each of the pixels has a light emitting device of a current driving-type, a driving transistor connected between a power line and the light emitting device, and a capacitance device having one end connected to a gate electrode of the driving transistor, the image voltage is input to the other end of the capacitance device during the writing period, an inclined wave voltage which changes a voltage level thereof according to time is input to the other end of the capacitance device during a light emission period following the writing period.
    Type: Application
    Filed: October 31, 2008
    Publication date: April 30, 2009
    Inventors: Hajime Akimoto, Norihiro Nakamura, Yasuharu Yatsu, Hiroshi Kageyama, Tohru Kohno
  • Publication number: 20090073149
    Abstract: The gate electrode is formed above the polycrystalline semiconductor layer through the gate insulating film. The polycrystalline semiconductor layer includes a first region overlapping with the gate electrode in plan view. The first region is sandwiched between the second region and the third region. The second region of the polycrystalline semiconductor layer includes a first impurity diffusion region and two second impurity diffusion regions opposite in conductivity type to the first impurity diffusion region. The first region and the first impurity diffusion region are in contact with each other at a first boundary. The first region and the two second impurity diffusion regions are in contact with each other at second boundaries. The two second impurity diffusion regions sandwiching the first impurity diffusion region are provided along the gate electrode. Thus, a leak current is suppressed.
    Type: Application
    Filed: August 7, 2008
    Publication date: March 19, 2009
    Inventors: Katsumi Matsumoto, Kozo Yasuda, Yasukazu Kimura, Takuo Kaitoh, Toshihiko Itoga, Hiroshi Kageyama
  • Patent number: 7460098
    Abstract: A liquid crystal display device includes a plurality of pixels arranged in a matrix, a plurality of video signal lines for supplying video signal voltages to the pixels, respectively, and a drive circuit for selecting a voltage level of a gray scale voltage varying periodically. As one of the video signal voltages corresponding to display data to be supplied to one of the plurality of pixels. The drive circuit has a plurality of processing circuits connected to each other in series by a processing result transmitting line, and display data lines are formed to intersect with the processing result transmitting line for supplying the display data to the processing circuits. The processing circuits are arranged in correspondence with crossing points of the display data lines and the processing result transmitting line.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: December 2, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Toshio Miyazawa, Hideo Sato, Hiroshi Kageyama, Iwao Takemoto
  • Patent number: 7460100
    Abstract: A liquid crystal display apparatus having a level conversion circuit in which a high speed operation can be attained and also a small transistor capacity can be obtained is provided. In the liquid crystal display apparatus, a signal circuit for driving pixel elements of a display unit and a scanning circuit are provided. The level conversion circuit is constituted of a first and a second transistors 111 and 112 in which a respective gate electrodes is connected to a first bias voltage power supply, and a third and a fourth transistors 121 and 122 in which a respective gate electrodes is connected to a second bias voltage power supply and a respective source electrodes is connected to a power supply.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: December 2, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Hideo Sato, Yoshiro Mikami, Hiroshi Kageyama, Tatsuya Ohkubo
  • Publication number: 20080218065
    Abstract: To reduce brightness variation by wiring resistance of an upper part transparent electrode in an organic luminescence element, a stripe-shape first auxiliary wiring 11 extending in a direction parallel to a signal line is formed on the upper part transparent electrode, by a precise mask vapor deposition method. Then, a stripe-shape second auxiliary wiring 12 extending in a direction parallel to a scanning line is formed by a precise mask vapor deposition method.
    Type: Application
    Filed: March 4, 2008
    Publication date: September 11, 2008
    Inventors: Shingo Ishihara, Eiji Matsuzaki, Hiroshi Kageyama
  • Publication number: 20080204377
    Abstract: The present invention realizes a high-quality display by optimizing a light emitting efficiency among pixels which differ in light emitting characteristic from each other by enabling to apply voltages corresponding to pixels which differ in color from each other while suppressing brightness irregularities attributed to a voltage drop of a power source line. Only power source lines Lv of sub pixels B and a bypass line Lb are connected with each other in a first row (X1), only power source lines Lv of sub pixels R and a bypass line Lb are connected with each other in a second row (X2), and only power source lines Lv of sub pixels G and a bypass line Lb are connected with each other in a third row (X3). Then, these arrangements of the sub pixels B, R, G, the power source lines Lv and the bypass lines Lb are repeated.
    Type: Application
    Filed: February 26, 2008
    Publication date: August 28, 2008
    Inventors: Kenta Kajiyama, Naoki Tokuda, Hiroshi Kageyama
  • Publication number: 20080198140
    Abstract: An image display apparatus with image entry function of high accuracy enabling high-speed direct screen input without decreasing a pixel aperture ratio. Data lines of thin-film transistors which do not receive light and storage lines are connected to respective selector switches. The selector switches are turned on and off by a switching signal supplied through a switching line from a control circuit. The conveyance of a drive signal and a video signal supplied from a gate line driving circuit and a data line driving circuit and the conveyance of a light signal to an X address detection circuit and a Y address detection circuit are switched by turning on and off the selector switches.
    Type: Application
    Filed: December 14, 2007
    Publication date: August 21, 2008
    Inventors: Masayoshi Kinoshita, Hiroshi Kageyama
  • Publication number: 20080198143
    Abstract: An image display apparatus with image entry function capable of high-speed and high-accuracy direct screen entry without increasing the peripheral circuit scale or the number of circuit elements for each pixel that lower the pixel aperture ratio. A first pixel circuit and a second pixel circuit are alternately arrayed horizontally. First and second data lines are connected to a data driver and a sensor signal processor circuit. Selector switches are connected to the input terminal of the data driver. Gray scale voltages are sent from the data driver to the first and second data lines, and first and second photo sensor signals are sent to the sensor signal processor circuit.
    Type: Application
    Filed: December 18, 2007
    Publication date: August 21, 2008
    Inventors: Masayoshi Kinoshita, Hiroshi Kageyama
  • Publication number: 20080186291
    Abstract: The present invention is to prevent a capture error of display data caused by a delay due to a built-in driving circuit in a display device with a built-in driving circuit.
    Type: Application
    Filed: September 25, 2007
    Publication date: August 7, 2008
    Inventors: Katsumi Matsumoto, Kozo Yasuda, Hiroshi Kageyama
  • Publication number: 20080164481
    Abstract: An image display apparatus with an illuminance sensor, where the packaging cost, mechanical reliability due to packaging, and product yield are maintained. In the same semiconductor film as a thin-film-transistor (TFT) consisting of a pixel formed over an insulating substrate constituting a pixel, plural photo-sensors composed of a TFT for detecting light which has different detecting wavelength bands, and a signal processing circuit for generating a signal which controls the brightness of the pixel on the basis of the output of the photo-sensor are formed. The photo-sensor detects light energy of different wavelength bands by using a filter having a different film thickness of the semiconductor film or a different light transmission band. Ambient illuminance is detected by processing the output of each sensor in the signal processing circuit. The detected signal is fed back to the brightness control of the pixel.
    Type: Application
    Filed: December 5, 2007
    Publication date: July 10, 2008
    Inventors: Mitsuharu Tai, Hiroshi Kageyama
  • Publication number: 20080122804
    Abstract: An image display unit with screen input function is provided, by which it is possible to input image data directly to a screen without decreasing numerical aperture of pixel. The image display unit comprises a light detecting TFT 61 receiving a light entering from a screen of a liquid crystal display panel, said light detecting TFT 61 is connected in series to a switching TFT 60, which does not receive a light entering from the screen of the liquid crystal display panel. To a source electrode of the light detecting TFT 61, a storage capacitor Cst and a pixel electrode of a liquid crystal element are connected. The liquid crystal element is represented by a capacitor CLC. A sensor control line 140 is connected to the gate electrode of the light detecting TFT 61, and a gate line 120 is connected to the gate electrode of the switching TFT 60. A data line 110 is connected to the drain electrode of the switching TFT 60, and a storage line 150 is connected to one end of a storage capacitor Cst.
    Type: Application
    Filed: November 3, 2007
    Publication date: May 29, 2008
    Inventors: Masayoshi KINOSHITA, Hiroshi Kageyama