Hitachi, Ltd.

Other

Hitachi Video Engineering, Incorporated

Hitachi Mizusawa Electronics Co.

Fujitsu Hitachi Plasma Display Limited

Fujitsu Corporation

Hitachi Video and Information System, Inc.

Advanced Pdp Development Center Corporation

Hitachi Mizusawa Elec. Co Ltd

Hitachi Mizusawa

Michitaka Ohsawa

Yuji Sano

Kouji Kitou

Nobutaka Okuyama

Hiroshi Ohtaka

Makoto Onozawa

Soichi Sakurai

Takashi Sasaki

Kazutaka Naka

Akihiko Kougami

Kuninori Matsumi

Tomokatsu Kishi

Ikuya Arai

Toyoshi Kawada

Masao Obara

Hitoshi Hirakawa

Noboru Akiyama

Fumitaka Asami

Masaji Ishigaki

Makoto Shiomi

Isao Yoshimi

Ichiro Niitsu

Yoshio Yoshiwara

Masaki Nakahara

Minoru Furuya

Kazuo Yoshiikawa

Yoshikazu Kanazawa

Nobuyuki Ushifusa

Hirokazu Inoue

Yuichiro Kimura

Kunio Ando

Seiichi Tsuchida

Kazuo Majima

Ken Hashimoto

Teruo Takai

Norio Yatsuda

Takahisa Mizuta

Hiroki Oguro

Yoshio Amemiya

Takeshi Kuwahara

Taizo Ohno

Kouji Fukuma

Kosuke Ozeki

Tadahiro Kawagishi

Kenji Kimura

Shinichi Yamada

Keizo Suzuki

Takuya Imaide

Hiroshi Koizumi

Yoshinori Okada

Sadao Tsuruga

Takeshi Hoshino

Eiji Matsuzaki

Masatoshi Shiiki

Hiroshi Yoshioka

Takayoshi Nakamura

Kenji Sato

Eiichi Yamazaki

Seiichi Yasumoto

Kiyoharu Kishimoto

Atsuo Osawa

Kazuhiro Kaizaki

Hitoshi Maekawa

Tatsuro Kawamura

Yasuji Noguchi

Moritaka Taniguchi

Toshiyuki Sakamoto

Kiyoshi Watanuki

Sadao Kubota

Souichi Sakurai

Takeo Masuda

Ikuo Yuki

Hidenori Ohnuki

Mitsuo Okimoto

Masaaki Kurosu

Katsuhiko Tonami

Atushi Takeyama

Kenji Ishiwata

Masashi Ohki

Chiharu Ishino

Tomoko Ogawa

Hitoshi Yamadera

Yukio Akiyama

Masahiro Kame

Kousuke Ozeki

Yosio Kikkawa

Hiroki Ohguro

Ichiri Niitsu

Keirou Shinkawa

Kenicji Matsumoto

Akito Takemoto

Osamu Hirohashi

Yoshimasa Awata

Mariko Tanaka

For a drive circuit of a sustaining discharge circuit of an AC plasma display panel, an idea of current flow parts arrangement is provided to reduce inductance. The configuration includes a plasma display panel on which electrodes are formed, an electric conductive conductor for fixing the panel, a pair of circuit boards fixed onto the conductor using a plurality of fixing members, ground terminals and electric power supplies disposed respectively for the circuit boards, and a pair of connecting circuit boards connected to end portions respectively of the circuit boards and an end portion of the panel. The ground terminals are electrically connected via fixing members to a position near an end portion of the conductor.

Plasma display apparatus

Frusto-conical needle-shaped light guide paths are implanted on the surface of a display panel such that output light from display elements propagate through the needle-shaped light guide paths through total reflection, while external light repeats reflections multiple times on wedge-shaped surfaces of the light guide paths, and attenuates. A light absorbing film is coated on the surfaces of the needle-shaped light guide paths to increase a contrast ratio. Thus, a higher contrast can be accomplished in a bright room, and cross-talk between adjacent pixels is reduced. A reduction in contrast due to display light is also alleviated by employing longer implanted needle-shaped light guide paths, and bringing light incident surfaces of the needle-shaped light guide paths into close contact with the surface of the display panel.

Front plate and display device using same

A plasma display apparatus, in which a sustain output device (transistor) with a voltage rating in accordance with the sustain voltage can be used even when a voltage greater than the sustain voltage is applied to a sustain electrode in the reset period and the address period, has been disclosed, wherein, an X or a Y drive circuit, to which a voltage greater than the sustain voltage is applied, comprises a first switch provided between a second sustain drive transistor and the supply source of a second voltage, and the voltage is supplied to the sustain drive transistor in the state in which the first switch is open.

A PDP apparatus of low power consumption and without erroneous malfunctions is equipped with a sustaining circuit that prevents an on/off timing shift and deterioration of a sustaining pulse produced thereby. Phase adjusting circuits, which adjust the timing of the changing edge of the sustaining pulse, are provided for the sustaining circuit; the power recovery circuit is of improved efficiency; and power consumption is reduced by optimizing the timing of a changing edge of the sustaining pulse The circuit devices used in the sustaining circuits are classified according to delay times and sets of the circuit devices are selected so that the timing of a changing edge of the sustaining pulse falls within a predetermined allowance, and the selected sets of the circuit devices are set to the PDP.

Plasma display apparatus and manufacturing method

A display apparatus includes a display panel including address electrodes and sustain electrodes crossing the address electrodes, with pixels being sandwiched between the address electrodes and the sustain electrodes. A sustain-electrode drive circuit selectively generates both sustain pulses and scan pulses and supplies them to the sustain electrodes. An address-electrode drive circuit generates address pulses based on a video signal and supplies the address pulses to the address electrodes. A control-signal generation circuit generates a control signal for controlling the sustain-electrode drive circuit to generate a selected one of the sustain pulses and the scan pulses and supplies the control signal to the sustain-electrode drive circuit. In order to display an image on the display panel, the sustain-electrode drive circuit both specifies addresses of pixels to be turned on and turns on the pixels at the specified addresses.

Display apparatus

A color image display apparatus which supplies red, green, and blue color video signals to respective red, green, and blue light emitting cells and performs color image display. Assuming that time response characteristics of light emission by red, green, and blue light emitting cells have respective values TR, TG, and TB, and &verbar;X&verbar; represents an absolute value of X, then &verbar;TR-TG&verbar;<&verbar;TR-TB&verbar; and &verbar;TR-TG&verbar;<&verbar;TG-TB&verbar; are satisfied. A front color fringe occurring at a front edge of a moving white rectangular pattern displayed on the color image display apparatus is blue and a rear color fringe occurring at a rear edge of the moving white rectangular pattern displayed on the color image display apparatus is yellow, thereby causing the front color fringe and the rear color fringe to be inconspicuous.

Color image display apparatus and method

A low-cost display driver module that shortens the process for connecting an integrated circuit chip and a wiring pattern on a flexible wiring board and uses a metal chassis on a display panel as a radiator. In this display driver module, an integrated circuit chip with bump electrodes on it is joined with pressure applied by the use of an anisotropic conductive film, an anisotropic conductive paste, a non-conductive resin paste, or a non-conductive resin film and the back of the integrated circuit chip is adhered to a metal chassis on a display panel by the use of an integrated-circuit chip adhesive. As a result, the metal chassis can be used as a radiator for the integrated circuit chip. Batch bonding will enable to shorten time for the connection process and to cut down the cost of installations. Furthermore, a radiator is unnecessary, resulting in a low-cost display driver module.

Display driver integrated circuit and flexible wiring board using a flat panel display metal chassis

A plasma display apparatus includes a plurality of first electrodes, a plurality of second electrodes which are arranged in substantially parallel to the plurality of first electrodes and generate electric discharge with the plurality of first electrodes at gaps therebetween, a first drive circuit which applies an electric discharge voltage to the plurality of first electrodes, a second drive circuit which applies an electric discharge voltage to the plurality of second electrodes, and voltage fluctuation balancing units which are provided for wiring lines between the first and second drive circuits and the first and second electrodes, and each of which has a conductive plate layer overlapping at least part of the wiring lines so as to reduce a variation in voltage drops specific to the wiring lines by eddy currents generated in the conductive plate layer in response to currents running through the wiring lines.

Plasma display apparatus having reduced voltage drops along wiring lines

A color image display apparatus which supplies red, green and blue color video signals to respective red, green and blue light emitting cells and performs color image display. Assuming that time response characteristics of light emission by red, green and blue light emitting cells have respective values TR, TG and TB, and &verbar;X&verbar; represents absolute value of X, then, &verbar;TR&minus;TG&verbar;<&verbar;TR&minus;TB &verbar; and &verbar;TR&minus;TG&verbar;<&verbar;TG&minus;TB&verbar; are satisfied.

A display apparatus uses a sub field which illuminates addressed pixels of a display unit to display an image. The display apparatus includes an image signal processing circuit which performs sub field conversion processing on an input image signal, a computational processing circuit which arranges address data of at least one lower sub field of an image displayed on the display unit identical in plural lines, and a drive circuit which addresses and illuminates pixels of the display unit based on the outputs of the input signal processing circuit and the computational processing circuit. An image corresponding to the input image signal is displayed by driving the display unit with the drive circuit when the computational processing circuit performs addressing of the at least one lower sub field simultaneously in plural lines and address periods which select the illuminated pixels of said display unit are shortened.

As is obvious from the description in the specification and the attached drawings, the present invention provides a display apparatus for displaying an image on a display panel by turning on pixels of said display panel, said display apparatus comprising: a display panel provided with: address electrodes driven by address pulses based on a video input signal; and sustain electrodes crossing said address electrodes and sandwiching electrical discharging units of pixels with said address electrodes and driven by sustain pulses; a sustain-electrode drive circuit for generating said sustain pulses and scan pulses, provided with a common circuit for generating said sustain pulses or said scan pulses in response to an operating state thereof and for supplying said scan pulses and said sustain pulses to said sustain electrodes.

In an operation of an address period for addressing cells of a display device, such as a plasma display panel, comprising a plurality of cells of three kinds, red (R), green (G), blue (B), which are arranged on a plane for forming a display surface thereof, in which each of said cells comprising: a pair of transparent electrodes provided in parallel to each other; an address electrode being positioned opposing the pair of transparent electrodes; luminescence medium provided on the address electrode; and a discharge space being defined between the pair of transparent electrodes and said fluorescence medium on the address electrode, wherein the address discharge is conducted by applying an address voltage to the address electrode, and the address voltage applied is determined depending upon the each kind of the cells, R, G and B.

Display device and driving method thereof

This specification and drawings disclose a display technology which displays an image by illuminating pixels of a display unit. The apparatus comprises an image signal processing circuit which processes an input image signal, a control circuit which controls display resolution information relating to the image displayed on the display unit, and a drive circuit which drives the display unit based on the output of an input signal processing circuit and the control circuit. The display resolution information is limited by the control circuit, and an image corresponding to an input image signal is displayed on the display unit when a time during which illuminated pixels are selected on the display unit, is shortened.

Display apparatus, display method and control-drive circuit for display apparatus

A display apparatus for displaying an image having gradation represented by subfields. The display apparatus includes a display panel, a circuit for outputting information in which a plurality of subfields in one field period is arranged so as to have first plural array portions where allotted light emitting weights increase gradually and second plural array portions where allotted light emitting weights decrease gradually, and a driver for forming a drive signal based on the information and for outputting the drive signal to the display panel.

Display apparatus for displaying an image having gradation

Growing community of inventors

Fujisawa, Japan

Michitaka Ohsawa