Hitachi, Ltd.

Other

Kabushiki Kaisha Tokai Rika Denki Seisakusho

Fujitsu Hitachi Plasma Display Limited

Fujitsu Corporation

Hitachi Plasma Patent Licensing Co., Ltd.

Hitachi Plasma Display Limited

Hiachi, Ltd.

Keizo Suzuki

Shigeru Nishimatsu

Sadayuki Okudaira

Ken Ninomiya

Masatoshi Shiiki

Kenichi Yamamoto

Hiroshi Kajiyama

Tetsuo Ono

Masayuki Shibata

Masaji Ishigaki

Norihiro Uemura

Shirun Ho

Susumu Hiraoka

Yoshimi Kawanami

Tatsumi Mizutani

Choichiro Okazaki

Ichiro Kanomata

Takashi Sasaki

Kazunori Tsujimoto

Tatsuya Miyake

Osami Okada

Hisao Yamada

Hiroki Mori

Yusuke Yajima

Seiichi Watanabe

Tetsunori Kaji

Yoshifumi Ogawa

Koji Ohira

Ikuo Ozaki

Tomokatsu Kishi

Masahito Mori

Yoshinao Kawasaki

Shinichi Tachi

Kazuo Nojiri

Naoyuki Kofuji

Naoshi Itabashi

Hiromichi Enami

Takashi Yunogami

Kenichi Mizuishi

Tetsuya Sakamoto

Tsuyoshi Fujita

Noriyuki Sakudo

Yutaka Kakehi

Teruki Suzuki

Kyoji Kariya

Ken'etsu Yokogawa

Takayuki Shimizu

Seiichi Tsuchida

Tadashi Furukawa

Toshio Uka

Hiroji Saida

Yoshiro Mikami

Yoshikazu Kanazawa

Atsushi Yokoyama

Yoshio Sakai

Hiroyuki Kobayashi

Yasunobu Hashimoto

Masakazu Sagawa

Hiroshi Masuda

Kazutaka Tsuji

Kunio Harada

Naoyuki Tamura

Michitaka Ohsawa

Hidemi Koike

Atsushi Hiraiwa

Ryohei Satoh

Shigeru Takahashi

Haruhiko Yamamoto

Hiroyuki Shichida

Yuichiro Kimura

Akitsuna Yuhara

Yasuhiko Kunii

Katsuya Watanabe

Shinichi Nakatsuka

Kunio Ando

Seiichi Yasumoto

Michifumi Kawai

Akihiko Kougami

Nobuyuki Negishi

Katsuhiko Mitani

Fuminori Komiya

Kenji Okishiro

Hideshi Fukumoto

Mitsuhiro Mori

Hideto Momose

Junji Shigeta

Takao Miyazaki

Kiyoshi Miyake

Hidekazu Okuhira

Akira Shintani

Tomohiko Murase

Takahisa Mizuta

Kenji Nakata

Shunichiro Nobuki

Sakae Saito

Takeo Masuda

Shinjiro Katagiri

Yuji Tajiri

Takumi Tandou

Takuma Tanimoto

In order to provide a plasma sterilization apparatus with high plasma generation efficiency, the apparatus includes first and second electrodes (), a first dielectric body layer (), and an insulating spacer (). The first dielectric body layer () is disposed between the first and second electrodes (). The insulating spacer () is disposed between the first electrode () and the first dielectric body layer (). The insulating spacer () has a lower permittivity than a permittivity of the first dielectric body layer ().

Plasma sterilization apparatus

A AC type plasma display apparatus has been disclosed, which satisfies various requirements such as the number of gradations that can be displayed, the display luminance, and the upper limit of power and, further, the efficiency of light emission and the luminance can be increased as much as possible and the display quality of which is not deteriorated. In the plasma display apparatus, a frame is composed of plural subfields, an image is displayed by causing a sustain discharge to occur in each subfield, the sustain discharge can be caused to occur by at least a first sustain waveform and a second sustain waveform different from the first sustain waveform, and the ratio of the first sustain waveform to the second sustain waveform changes, both waveforms being used to cause the sustain discharge to occur in each subfield.

Plasma display apparatus

A plasma display apparatus having a priming discharge region PDC partitioned from a display discharge cell DDC, by a traverse rib, at a side where the second electrode between the display discharge cell DDC adjacent in a row direction is adjacent; a second longitudinal rib partitioning the priming discharge region PDC; a third longitudinal rib, further partitioning a region partitioned by the second longitudinal rib into two sections; a convex electrode; and a gap connecting the display discharge cell DDC and the priming discharge cell PDC, wherein a sum of a width in a line direction of a nearly rectangular space region containing adjacent two priming discharge cells PDCs, and a pattern width of the second longitudinal rib is designed larger than a sum of a width in the row direction and a pattern width of the traverse rib.

A plasma display device includes a plasma display panel provided with plural discharge cells each having discharge gas, a pair of sustain electrodes which generate sustain discharge, and a phosphor, and a driving circuit which applies a sustain pulse voltage between the pair of sustain electrodes for generating the sustain discharge. The sustain pulse voltage is formed of a first portion having a main portion of a first voltage Vp and a second portion succeeding the first portion in time and having a main portion of a second voltage Vs higher than the first voltage Vp, the sustain discharge is formed of a pre-discharge and a main discharge succeeding the pre-discharge in time, and the first voltage Vp is selected to satisfy Vpmin&#x2266;Vp&#x3c;Vs, where Vpmin is a minimum of the first voltage Vp which stabilizes the sustain discharge.

Plasma display device

A high-luminance plasma display panel has a plurality of discharge cells including a phosphor film emitting visible rays by excitation caused by ultraviolet light generated by the discharge of a discharge gas. The phosphor film has at least two layers of a phosphor layer and a reflecting layer, and the phosphor layer is arranged closer to the discharge space side than the reflecting layer. A film thickness Wt of the phosphor film is 40 &#x3bc;m or less, and a film thickness Wp of the phosphor layer, a particle diameter dp of a phosphor that is at least a part of components of the phosphor layer, a film thickness Wr of the reflecting layer, and a particle diameter dr of a reflecting material that is at least a part of components of the reflecting layer satisfy 2dp&#x2266;Wp&#x2266;5dp and 2dr&#x2266;Wr&#x2266;Wt&#x2212;Wp.

Plasma display panel and plasma display apparatus using the same

A plasma display panel has plural discharge cells between two opposing first and second substrates. Each of the discharge cells includes at least one pair of electrodes for generating a discharge for display, a discharge gas and a phosphor film for emitting visible light by being excited by ultraviolet rays produced by the discharge of the discharge gas. Laminated members are dispersed in a plane within each of the discharge cells inside the first substrate from which visible light for display is emitted, and each of the laminated members includes a light absorption layer disposed on a side of the first substrate on which ambient light is incident and a light reflection layer disposed on a phosphor-film side of the laminated members. A visible-light-reflection layer is disposed on a surface of the phosphor film on a side thereof opposite from a space in which the discharge is generated.

Plasma display panel having laminated members and visible light reflection layer

There is provided a plasma display device capable of high luminous efficacy and stable driving for displaying images at various image display load factors. The plasma display device performs the sustain discharge for a light-emission display, and is configured to apply a sustain pulse voltage between a sustain electrode pair in a respective one of the plural discharge cells to generate a sustain discharge in a respective one of the following operating modes selected based upon use of the plasma display device: (a) generating a pre-discharge and then a main discharge; (b) generating a main discharge without a pre-discharge preceding the main discharge; and (c) switching between the mode (a) and the mode (b). The sustain voltage waveforms are used which compensate for an increase in voltage drop due to an increase in discharge current when the image display load factor is excessively increased.

Plasma display device having improved luminous efficacy

A plasma display panel has plurality discharge cells disposed between a pair of opposing first and second substrates. Each of the discharge cells includes at least: at least one pair of electrodes for generating a discharge for display; a discharge gas; and a phosphor film for emitting visible light by being excited by ultraviolet light produced by the discharge of the discharge gas. Laminated members are dispersed in a plane within each of the discharge cells inside the first substrate from which visible light for display is emitted. Each of the laminated members includes a light absorption layer disposed on a side of the first substrate on which ambient light is incident and a light reflection layer disposed on a phosphor-film side of each of the laminated members.

Plasma display panels and plasma display devices which use the panel

A plasma display panel and an imaging device realize a high luminous efficiency, a long lifetime and stable driving. The plasma display panel uses a discharge-gas mixture containing at least Xe, Ne and He. A Xe proportion of the discharge-gas mixture is in a range of from 2% to 20%, a He proportion of the discharge-gas mixture is in a range of from 15% to 50%, the He proportion is greater than the Xe proportion, and a total pressure of the discharge-gas mixture is in a range of from 400 Torr to 550 Torr. A width of a voltage pulse to be applied to an electrode serving as an address electrode is 2 &#x3bc;s or less.

Plasma display panel and imaging device using the same

A plasma display panel includes plural discharge cells and a barrier rib layer which defines the discharge cells. Each discharge cells has two opposing electrodes on front and rear substrates, respectively, for generating discharge therebetween, discharge gas and phosphor films. The barrier rib layer is fabricated as a sheet separate from the substrates, is provided with openings each forming a discharge space, and is sandwiched between the substrates. The following relationships are satisfied: 0.1&#x2266;S/S&#x2266;0.4; 100 Torr &#xd7;mm&#x2266;pd&#x2266;400 Torr&#xd7;mm; and 0.2 mm&#x2266;d, where Sis an area of a projection of a space occupied by one discharge cell onto the front substrate, Sis an area of a portion of the front substrate for projecting light from the discharge cell, p is a pressure of the discharge gas, and d is a distance between the electrodes.

Plasma display panel and video display system employing same

A plasma display device is realized which has a high set-luminous-efficacy (i.e. provides a high-brightness display image at a low power consumption) and a high light-room contrast. The luminous efficacy hs and the display discharge voltage Vs are increased by increasing the product pd in discharge, or increasing the Xe proportion aXe of the discharge. As a result the display-discharge region area ratio Ad and the display region reflectance &#x3b2; can be reduced by reducing the display-electrode area Sse approximately in inverse proportion to Vs, and thereby the set-luminous efficacy hs and the set luminance Bpons and the light-room contrast Cb are increased.

Plasma display device having an improved contrast radio

A plasma display includes a display panel and a driving circuit for driving the display panel. A space for at least one color, of spaces between barrier ribs for defining discharge spaces for red, green and blue colors of the display panel is different from the spaces for other colors.

Adjustment of luminance balance of red, green and blue light emissions for plasma display by using different sized areas of phosphor layers producing corresponding colors

There are provided a plasma display panel and an imaging device which realize a high luminous efficiency, guaranteed long lifetime and stable driving. The plasma display panel uses a discharge-gas mixture containing at least Xe, Ne and He. A Xe proportion of the discharge-gas mixture is in a range of from 2% to 20%, a He proportion of the discharge-gas mixture is in a range of from 15% to 50%, the He proportion is greater than the Xe proportion, and a total pressure of the discharge-gas mixture is in a range of from 400 Torr to 550 Torr. A width of a voltage pulse to be applied to an address electrode is 2 &mgr;s or less.

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Kodaira, Japan

Keizo Suzuki