Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Matsushita Electrical Industrial Co., Ltd.

Matsushita Electric Co., Ltd.

Matshushita Electric Industrial Co., Ltd.

Masaki Aoki Et Al.

Masaki Aoki

Junichi Hibino

Mitsuhiro Ohtani

Kazuhiko Sugimoto

Hiroyuki Kawamura

Hideo Torii

Hiroyuki Kado

Hiroshi Setoguchi

Shigeo Suzuki

Ryuichi Murai

Yoshinori Tanaka

Hiroyoshi Tanaka

Eiji Fujii

Mitsuhiro Otani

Yoshiki Sasaki

Akira Shiokawa

Kanako Miyashita

Katsuyoshi Yamashita

Keisuke Sumida

Yuichiro Miyamae

Yasuhisa Ishikura

Masatoshi Kudoh

Hideyuki Okinaka

Makoto Umetani

Keiji Horikawa

Hideaki Yasui

Yutaka Nishimura

Hideto Monji

Hideki Asida

Takashi Inami

Morio Fujitani

Yuusuke Takada

Hiroyuki Yonehara

Masahiro Nagasawa

Hiroshi Yamazoe

Kiyoshi Kuribayashi

Kinzou Nonomura

Taku Watanabe

Hidetaka Higashino

Shinya Fujiwara

Kaname Mizokami

Koichi Kotera

Masayuki Sakai

Nobuyuki Aoki

Yoshinari Kashiwagi

Yoshinao Oe

Keiichi Ochiai

Kazuyuki Hasegawa

Seigo Shiraishi

Kojiro Okuyama

Masahiro Sakai

Kinzo Nonomura

Shigeru Yoshida

Masumi Hattori

Nobuyuki Kirihara

Hideki Marunaka

Takehiro Zukawa

Teppei Hosokawa

Tadashi Nakagawa

Yumi Kondo

Tanaka Yoshinori

Koichi Azuma

Setoguchi Hiroshi

Nobuaki Nagao

Kenji Inoue

Ryoichi Takayama

Takaaki Tanaka

Atsushi Tomozawa

Satoru Yuhaku

Koji Funami

Shoji Nakamura

Daisuke Adachi

Masafumi Ookawa

Hideaki Komoda

Hiroyosi Tanaka

Yasuhiko Horio

Masahide Yamauchi

Katuyoshi Yamashita

Toshiaki Ogura

Kenichi Fujii

Isamu Inoue

Izumi Toyoda

Hideki Ashida

Yasuyuki Akata

Toshiyuki Okada

Tohru Hori

Ikuo Ota

Hozumi Hirota

Nahoko Shimamura

Miho Sugihara

Shinya Hujiwara

Ken Kamata

Syunsuke Nishimura

Yasuko Nishimura

Emi Kawahara

The first object of the present invention is to provide a PDP with improved panel brightness which is achieved by improving the efficiency in conversion from discharge energy to visible rays. The second object of the present invention is to provide a PDP with improved panel life which is achieved by improving the protecting layer protecting the dielectrics glass layer. To achieve the first object, the present invention sets the amount of xenon in the discharge gas to the range of 10% by volume to less than 100% by volume, and sets the charging pressure for the discharge gas to the range of 500 to 760 Torr which is higher than conventional charging pressures. With such construction, the panel brightness increases. Also, to achieve the second object, the present invention has, on the surface of the dielectric glass layer, a protecting layer consisting of an alkaline earth oxide with (100)-face or (110)-face orientation. The protecting layer, which may be formed by using thermal Chemical Vapor Deposition (CVD) method, plasma enhanced CVD method, or a vapor deposition method with irradiation of ion or electron beam, will have a high sputtering resistance and effectively protect the dielectrics glass layer. Such a protecting layer contributes to the improvement of the panel life.

Method of producing plasma display panel with protective layer of an alkaline earth oxide

A plasma display device has a first plate and a second plate which face each other with a discharge space therebetween, and a sealing member which is provided between the first and second plates to seal the discharge space at edges of the first and second plates. A plurality of electrodes are formed on the inner major surface of the first or second plate. An electrode diffusion preventive layer is formed in each area where the plurality of electrodes cross over the sealing member, so as to avoid direct contact between the plurality of electrodes and the sealing member. As a result, problems such as breaking of the electrodes can be avoided. This construction is especially effective when the electrodes contain Ag.

Plasma display and method for producing the same

A plasma display device provided with a green color phosphor which is charged entirely with a positive potential, adsorbs only limited amounts of water, carbon monoxide, carbon dioxide and hydrocarbon, and not liable to cause chemical reaction thereto. A green color phosphor layer is formed of the green phosphor comprising at least one compound selected from among materials defined by the general formulae of M(GaAl)O:Mn(where 'M' denotes one of Zn, Mg, Ca and Sr), (YGd) (GaAl)(BO):Tb, (YGd) (GaAl)(BO):Ce, Tb, (YGd) BO:Tband (YGd)(GaAl)O:Tb.

Plasma display device

Phosphor layers (G,B, andR) are made of a combination of: blue and green phosphors that are positively charged on their surfaces and baked in an oxygen-nitrogen atmosphere to reduce oxygen vacancy, and that have a &#x3b2;-alumina crystal structure; and a red phosphor made of an yttrium oxide compound. Uniformly forming such phosphor layers on the wall surfaces of barrier ribs () provides equal charge characteristics of the phosphors of respective colors, reduces oxygen vacancy in the phosphors, and inhibits adsorption of various gases in the panel production process. This can stabilize the discharge characteristics and prevent luminance degradation at driving the panel.

Plasma display with phosphors containing a &#x3b2;-alumina crystal structure

In a phosphor whose host crystal is constituted of an oxide, a method of preparing the phosphor where the oxygen deficiencies in the phosphor are not many, and a plasma display device using the same are provided. After processes of weighing, mixing and filling powders of the phosphor, a process for firing in a reducing atmosphere and a process for firing in an oxidizing atmosphere after the last reducing atmosphere process are provided. In addition, a firing temperature in the oxidizing atmosphere process is not less than 600&#xb0; C. and not more than 1000&#xb0; C.

Plasma display device and method of preparing phosphor

Disclosed here is a plasma display unit that employs phosphors having an amount of charge controlled close to zero, by which degradation in luminance, color temperature, and charge characteristics can be minimized. A phosphor bearing positive or negative charge is coated with a compound for controlling the amount of charge of the phosphor through a strong chemical bonding, whereby the amount of charge of a phosphor can be suppressed within &#xb1;0.01 &#x3bc;C/g. Controlling the amount of charge of phosphors close to zero can keep impurity gases away from the phosphor particle when the panel is in operation, suppressing problems critical to driving a plasma display unit, such as luminance degradation of phosphors, improper alignment of color in panel operation, luminance degradation when the panel displays all white.

Phosphor and plasma display unit

An object of the present invention is to provide a technique for relatively easily suppressing the yellowing of a Plasma Display Panel in which electrodes comprising silver are disposed on the substrates, and thus render image displays with high luminance and high quality. In order to achieve the object, an arrangement is made in which the electrodes comprising silver further include an element whose standard electrode potential is lower than that of silver, such as Cr, Al, In, B, and Ti, or a compound of such an element, as a silver ionization inhibiting substance.

Plasma display panel with an improved electrode

A PDP has first and second substrates which face each other with a space in between. A display electrode pair and a dielectric layer are formed on the first substrate, and a plurality of discharge cells are formed between the first and second substrates along the display electrode pair. In this construction, two or more depressions are provided in the dielectric layer in an area corresponding to each discharge cell. This improves luminous intensity and illumination efficiency. Also, to form the dielectric layer on the first substrate, first a transfer film is made by providing a dielectric precursor layer on a support film, then depressions are formed in the dielectric precursor layer of the transfer film, and lastly the dielectric precursor layer of the transfer film is transferred onto the first substrate. This decreases the number of manufacturing steps and increases the yield, thereby reducing manufacturing costs.

Plasma display panel and method for increasing charge capacity of a display cell

The present invention provides a plasma display panel that suppresses discharge sustain voltage, and reduces brightness degradation of a phosphor. In the plasma display panel, as protective film () made of magnesium oxide (MgO) formed on dielectric glass layer (), protective film () made of magnesium oxide (MgO) with oxide added with an electronegativity of 1.4 or higher, is formed to suppress impure gas adsorption by protective film (), stabilizes discharge sustain voltage, and reduces brightness degradation.

Plasma display panel having a magnesium oxide protective film and method for producing same

A method of manufacturing a plasma display panel is disclosed. The method includes forming at least one of a dielectric layer on a principal face of a substrate, barrier ribs which partition a discharging space on the dielectric layer, and a phosphor layer disposed between the barrier ribs using an inorganic material into which solution including a degassing material is impregnated.

Plasma display panel manufacturing method

The present invention relates to a plasma display device and to a method of producing a phosphor to be used for the device, that prevents the phosphor layer from deteriorating, and improves the luminance, life, and reliability, of a plasma display panel (PDP). The plasma display device is equipped with a plasma display panel in which a plurality of discharge cells are arranged, phosphor layers (R,G,B) in color corresponding to each discharge cell are disposed, and phosphor layers (R,G,B) are excited by ultraviolet light to emit light. Green phosphor layer (G) has a green phosphor including ZnSiO:Mn, the element ratio of zinc (Zn) to silicon (Si) at the proximity of its surface is, which is the stoichiometric ratio, and the layer is positively charged or zero-charged.

Plasma display and method of producing phosphor used therein

A plasma display device provided with a green color phosphor which is charged entirely with a positive potential, adsorbs only limited amounts of water, carbon monoxide, carbon dioxide and hydrocarbon, and not liable to cause chemical reacttion thereto. The green color phosphor used is any one or a combination two or more kinds of phosphors selected from among compounds defined by the general formulae of MAlO:Mn(where 'M' denotes one of Ca, Sr, Eu and Zn) having a magnetoplumbite crystal structure, (YGd) (GaAl)(BO):Tb, (YGd) (GaAl)(BO):Ce, Tb, (YGd) BO:Tband (YGd)(GaAl)O:Tbhaving any of an yttrium borate crystal structure and yttrium aluminate crystal structure.

A PDP with superior light-emitting characteristics and color reproduction is achieved by setting the chromaticity coordinate y (the CIE color specification) of light to 0.08 or less, more preferably to 0.07 or less, or 0.06 or less, enabling the color temperature of light to be set to 7,000K or more, and further to 8,000K or more, 9,000K or more, or 10,000K or more. The PDP is manufactured by a method in which the processes for heating the fluorescent substances such as the fluorescent substance baking, sealing material temporary baking, bonding, and exhausting processes are performed in the dry gas atmosphere, or in an atmosphere in which a dry gas is circulated at a pressure lower than the atmospheric pressure. This PDP is also manufactured by: a method in which after the front and back panels are bonded together, the exhausting process for exhausting gas from the inner space between panels is started while the panels are not cooled to room temperature; or a method in which after the front and back panels are temporarily baked, the process for bonding the panels is started while the panels are not cooled to room temperature. This reduces the time and energy required for heating, resulting in reduction of manufacturing cost.

Plasma display panel with superior light-emitting characteristics, and method and apparatus for producing the plasma display panel

Growing community of inventors

Mino, Japan

Masaki Aoki