Hitachi, Ltd.

Hitachi Displays, Ltd.

Panasonic Liquid Crystal Display Co., Ltd.

Japan Display Inc.

Samsung Display Co., Ltd.

Canon Kabushiki Kaisha

Hitachi Industrial Equipment Systems Co., Ltd.

Hitachi Displays Co., Ltd.

Hitacji Displays, Ltd.

Hiroshi Kageyama

Hajime Akimoto

Yoshiro Mikami

Naoki Tokuda

Masamitsu Furuie

Hideo Sato

Tatsuya Ohkubo

Toshihiro Sato

Toshio Miyazawa

Shinichi Komura

Shigeyuki Nishitani

Kazuhito Masuda

Yoshiteru Shimizu

Genshiro Kawachi

Katsumi Matsumoto

Futoshi Furuta

Iwao Takemoto

Ken Takei

Tohru Kohno

Kozo Yasuda

Toru Masuda

Ayumu Hatanaka

Takahide Kuranaga

Ikuo Hiyama

Tsunenori Yamamoto

Naruhiko Kasai

Mitsuhide Miyamoto

Yasushi Sasaki

Yoshinori Aono

Takanori Yamashita

Satoru Akiyama

Tatsuhito Goden

Masami Iseki

Takuo Kaitoh

Katsumi Ishikawa

Hideo Satou

Masayoshi Kinoshita

Takahiro Nagano

Fujio Kawano

Eiji Matsuzaki

Akio Shima

Satoshi Ibori

Yasukazu Kimura

Shingo Ishihara

Toshihiko Itoga

Hiroyuki Maru

Kouji Ikeda

Noriharu Matsudate

Shinya Ohtsuji

Takashi Ishigaki

Takashi Watanabe

Toshihiro Satou

Fumiaki Komori

Kazutoshi Ogawa

Yasuharu Yatsu

Yoshirou Mikami

Tetsuya Aoyama

Ryuusei Fujita

Takeshi Izumida

Daichi Kawamura

Noboru Kataoka

Kiyotaka Tomiyama

Tomiyama Kiyotaka

The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.

Organic electroluminescent display device

A power-conversion device and a ground-fault-location-diagnosis method for determining ground-fault locations on a motor and a cable are disclosed. The power-conversion device includes a ground-fault-current-measurement unit, an interphase short-circuit current-measurement unit, and a ground-fault-location-determination unit. The ground-fault-current-measurement unit turns on all switches of either upper arms or lower arms of three half-bridge circuits, and measures output current values of a plurality of phases generated during the ON period. The interphase short-circuit-current-measurement unit turns on a switch of an upper arm of one phase of the three half-bridge circuits and a switch of a lower arm of a phase different from the one phase, and measures output current values of a plurality of phases generated during a period of time both switches are ON. The ground-fault-location-determination unit determines a ground-fault location based on output-current values measured by the ground-fault-current-measurement unit and the output-current values measured by the interphase short-circuit current-measurement unit.

Power conversion device and ground fault location diagnosis method

An acoustic emission wave detection system and an acoustic emission wave detector are provided. The acoustic emission wave detection system includes an acoustic emission wave detector, a photoelectric converter, and a determination processor. The acoustic emission wave detector includes a housing, an optical fiber that guides light from a wideband light source into the housing, and an FBG housed in the housing and having a diffractive grating that reflects light guided into the housing. The FBG is fixed on a side of the other end in the housing such that the light guided into the housing is received by one end thereof. An acoustic emission wave from a high-voltage apparatus is received by the other end thereof. Due to the insulation resistance of the FBG, the acoustic wave detector can be installed close to or in contact with the high-voltage apparatus without introducing discharges or noise from the high-voltage apparatus.

Acoustic emission wave detection system for a high voltage apparatus

The object of the present invention is to compensate for a difference in threshold voltage between a plurality of switching devices incorporated in a power module. The present invention solves the subject described above by mounting a switching device having a high threshold voltage in comparison with a different switching device at a location at which the temperature of the power module during operation is higher than that at another location at which the different switching device is mounted. Eventually, a power conversion apparatus of a high performance and a vehicle drive apparatus of a high performance can be provided.

Power module, electrical power conversion device, and driving device for vehicle

Provided is an image display device, which includes: a display area including a plurality of pixels each of which includes a self light-emitting element; and a plurality of signal lines for inputting an image voltage to each of the plurality of pixels, in which: each of the plurality of pixels includes a field-effect transistor for driving the self light-emitting element based on the image voltage which is input through each of the plurality of signal lines to each of the plurality of pixels; the display area is divided into at least two regions including a first region and a second region; and a (channel width-to-channel length) ratio of the field-effect transistor in the first region is smaller than the ratio of any field-effect transistor in the second region.

Image display device

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 TFTreceiving a light entering from a screen of a liquid crystal display panel, said light detecting TFTis connected in series to a switching TFT, 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, a storage capacitor Cst and a pixel electrode of a liquid crystal element are connected. The liquid crystal element is represented by a capacitor C. A sensor control lineis connected to the gate electrode of the light detecting TFT, and a gate lineis connected to the gate electrode of the switching TFT. A data lineis connected to the drain electrode of the switching TFT, and a storage lineis connected to one end of a storage capacitor Cst. An image signal is sent to a pixel electrode (ITO) of the liquid crystal element (C). The light detecting TFTtransmits photoelectric current Igenerated by sensing the light to a sensor signal processing circuit (see FIG.) via the data line

Image display unit with screen input function

Provided is an image display device including: a plurality of pixel scanning lines; a plurality of signal lines; and a plurality of pixel circuits corresponding to intersections between the pixel scanning lines and the signal lines. Each of the pixel circuits includes: a driver transistor; a light emitting element for emitting light based on the current supplied from the driver transistor; a pixel switch for generating a potential based on an image signal and a scanning signal; a capacitor element for controlling the driver transistor based on a potential difference caused by the potential supplied from the pixel switch; and a reset switch for setting a potential at an end of the capacitor element to a predetermined state based on a scanning signal supplied from one of the pixel scanning lines preceding the scanning signal which corresponds to the corresponding one of the plurality of pixel circuits.

Image display device having a reset switch for setting a potential of a capacitor to a predetermined reference state

An image display is provided with a display area including pixels, each including illuminating means. A control circuit turns the illuminating means of the pixels on and off. A first terminal of a capacitor is connected to an input terminal of the control circuit. An image signal voltage generation circuit generates image signal voltages and a pixel drive voltage generation circuit generates pixel drive voltages for the pixels. A connector is provided for connecting either one of the image signal voltages or the pixel drive voltages to a second terminal of the capacitor. As such, an amount of drive current for the pixels is controlled in accordance with both the pixel drive voltage and the image signal voltage.

Image display

Growing community of inventors

Hachioji, Japan

Hiroshi Kageyama