Matsushita Electric Industrial Co., Ltd.

Daikin Industries, Ltd.

Panasonic Corporation

Matshushita Electric Industrial Co., Ltd.

Nippon Frontier Medicine Laboratories Inc.

Kubota Corporation

Toshiba Mobile Display Co., Ltd.

Yoshinori Tanaka

Kenji Nakao

Kenji Okamoto

Masaki Aoki

Junichi Hibino

Kazuhiko Sugimoto

Hiroshi Setoguchi

Shoichi Ishihara

Katsuji Hattori

Tsuyoshi Uemura

Daiichi Suzuki

Yuichiro Miyamae

Junichi Kobayashi

Hirofumi Kubota

Hiroyuki Yamakita

Satoshi Koyama

Masanori Kimura

Satoshi Komatsu

Akinori Shiota

Keiji Horikawa

Takehide Tsuda

Katsumi Adachi

Hirokazu Aoyama

Kazuhiro Takahashi

Takehiro Chaki

Hirofumi Wakemoto

Mika Nakamura

Mitsutaka Okita

Yoshinori Kobayashi

Katsuhiko Kumagawa

Hiroyuki Kawamura

Ichiro Sato

Tadashi Nakano

Yoneharu Takubo

Hiroki Oso

Katsuyuki Arimoto

Hideyuki Koyama

Shingo Nakamura

Takahiro Yamazaki

Eiji Seki

Kentaro Nagai

Keisuke Tsuda

Shin-ichiro Hatta

Tatsuya Hirata

Tatsuya Otsuka

Teppei Hosokawa

Yumi Kondo

Hitoshi Yoshimi

Yukio Numata

Yuusuke Etou

Keisuke Tano

Hideyuki Goto

Izumi Toyoda

Akira Tanaka

Rina Kaneko

Takahito Hamasaki

Takeo Matsumoto

Takeomi Hirasaka

Junichi Fukui

Shingo Matsunobu

Nobuyoshi Okada

Takashi Yamaguchi

Kunihiro Musashi

Hiroshi Kuwasaki

Shoji Takagi

Yuusuke Iwanaga

Shinichi Matsumura

Kazunari Tanaka

Ayako Sakurai

Masaya Mori

A method for producing methyl fluoride, comprising the steps of: (1) pyrolyzing a starting compound in a gas phase to thereby obtain a mixed gas containing methyl fluoride and acid fluoride; and (2) rectifying the mixed gas obtained in step (1) to thereby obtain methyl fluoride.

Methyl fluoride production method

Pill organizer package

The present invention provides a method for purifying chlorinated hydrocarbon(s), comprising cooling a mixture containing hydrogen fluoride and at least one chlorinated hydrocarbon selected from the group consisting of 2-chloro-3,3,3-trifluoropropene, 2,3-dichloro-3,3-difluoropropene, 1,2,3-trichloro-1,1-difluoropropane, and 1,1,1,2,3-pentachloropropane to cause liquid-liquid separation of the mixture into an upper liquid phase having a high hydrogen fluoride concentration and a lower liquid phase having a high chlorinated hydrocarbon concentration, and a method for purifying a chlorinated hydrocarbon, comprising subjecting the lower liquid phase obtained by the liquid-liquid separation to a distillation operation. According to the present invention, a chlorinated hydrocarbon can be purified by separating and removing hydrogen fluoride from a chlorinated hydrocarbon-hydrogen fluoride mixture under simple and economically advantageous conditions.

Method for purifying chlorinated hydrocarbon

The present invention provides a method for purifying HFO-1234yf, comprising the steps of (1) cooling a liquid mixture containing HFO-1234yf and HF to separate the mixture into a upper liquid phase having a high concentration of HF and a lower liquid phase having a high concentration of 2,3,3,3-tetrafluoropropene; and (2) subjecting the lower liquid phase obtained in step (1) to a distillation operation to withdraw a mixture containing HFO-1234yf and HF from a top of a distillation column, thereby obtaining substantially HF-free HFO-1234yf from a bottom of the distillation column. According to the present invention, HF and HFO-1234yf contained in a mixture containing HF and HFO-1234yf can be separated under simple and economically advantageous conditions.

Method for purifying 2,3,3,3-tetrafluoropropene

A novel process for producing a fluoroalkyl iodide telomer is provided, which is able to obtain a fluoroalkyl iodide telomer having a desired chain length, efficiently. A fluoroalkyl iodide represented by the general formula RfI (wherein Rf is a Cfluoroalkyl group) and tetrafluoroethylene are used as a telogen and a taxogen, respectively. These compounds are supplied to a distillation apparatus. In a reaction zone located in an intermediate part of the distillation apparatus, the compounds are subjected to a telomerization reaction in the presence of a metal catalyst with heating to generate a fluoroalkyl iodide telomer represented by the general formula Rf(CFCF)I (wherein Rf is the same as defined above and n is an integer of 1-4). Thereafter, a fraction comprising the fluoroalkyl iodide telomer is separated by distillation.

Process for producing fluoroalkyl iodide telomer

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

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

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 plasma display device including a green phosphor of which brightness is hardly deteriorated and a production method therefore are disclosed. The plasma display device comprises a plasma display panel in which a plurality of discharge cells of one color or a plurality of colors are disposed, red phosphor layersR, green phosphor layersG, and blue phosphor layersB are arranged correspondingly to the respective discharge cells, and the red phosphor layersR, the green phosphor layersG, and the blue phosphor layersB are excited by ultraviolet rays to emit light. The green phosphor layersG include a green phosphor expressed by (MEuTb)O.MgO.2SiO(here, M is at least one element selected from Ca, Sr, and Ba).

Plasma display device and method of manufacturing same

A plasma display panel having an excellent image display quality and high reliability is provided by preventing deterioration of a phosphor due to hydrocarbon gas remaining in the plasma display panel. The plasma display panel includes front panel () and rear panel () disposed opposing each other, and front panel () is provided with a plurality of display electrodes composed of a pair of scan electrodes () and sustain electrodes (), and rear panel () has barrier ribs () forming discharge cells (). In the plasma display panel, rear panel () includes data electrodes () perpendicular to display electrodes composed of a pair of scan electrodes () and sustain electrodes () on substrate (), dielectric layer () covering data electrodes (), reflective layer () containing an oxidation catalyst and covering at least a part of dielectric layer (), and phosphor layer () covering reflective layer ().

Plasma display panel having a reduced impurity gas content

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. The green color phosphor used is a combination of any of phosphors defined by the general formula of MMgAlO:Mn(where 'M' denotes one of La and Ce) having a magnetoplumbite crystal structure, yttrium borate group and yttrium aluminate group phosphors defined by the general formulae of (YGd) BO:Tb, (YGd) (GaAl)(BO):Tb, (YGd) (GaAl)(BO):Ce, Tb, (Y)(GaAl)O:Tband La MgAlO:Ce, Tb.

Plasma display device with green emitting phosphor that becomes positively charged

Growing community of inventors

Osaka, Japan

Yoshinori Tanaka