Patents by Inventor Masataka Yamashita

Masataka Yamashita has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20020137492
    Abstract: When electronic mail transmitting operation is performed, it is checked whether the standby mode is the digital mode. If the standby mode is not the digital mode, processing for changing the standby mode from the analog mode to the digital mode is executed. When the standby mode is changed to the digital mode, the electronic mail is transmitted through a digital channel. If the standby mode cannot be changed to the digital mode, the transmission electronic mail is stored in a memory, and message hold transmission control is executed afterward.
    Type: Application
    Filed: March 26, 2002
    Publication date: September 26, 2002
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tatsuya Suetaka, Yoichi Nagashima, Masataka Yamashita
  • Publication number: 20020016124
    Abstract: A method for producing an electron-emitting device comprising an electroconductive film having an electron-emitting region between electrodes, wherein a step of forming the electron-emitting region in the electroconductive film comprises a step of heating the electroconductive film and a step of energizing the electroconductive film, in an atmosphere in which a gas for promoting cohesion of the electroconductive film exists.
    Type: Application
    Filed: February 16, 1999
    Publication date: February 7, 2002
    Inventors: MASATAKA YAMASHITA, HISAAKI KAWADE, TOSHIKAZU OHNISHI, TATSUYA IWASAKI, TAKEO ONO
  • Publication number: 20010036682
    Abstract: This invention provides an electron source manufacturing apparatus which can be easily downsized and operated. The electron source manufacturing apparatus includes a support member for supporting a substrate (10) having a conductor (11), a vessel (12) which has a gas inlet port (15) and a gas exhaust port (16) and covers a partial region of the surface of the substrate (10); a gas inlet unit (24) connected to the gas inlet port (15) to introduce gas into the vessel, an exhaust unit (26) connected to the gas exhaust port to evacuate the interior of the vessel, and a voltage application unit (32) for applying a voltage to the conductor.
    Type: Application
    Filed: February 21, 2001
    Publication date: November 1, 2001
    Inventors: Toshihiko Takeda, Masaru Kamio, Masataka Yamashita, Yasue Sato, Hitoshi Oda, Keisuke Yamamoto, Miki Tamura, Hideshi Kawasaki, Kazuhiro Jindai
  • Patent number: 6284382
    Abstract: Disclosed is an antireflection film used to be stuck on the surface of a glass panel of a CRT, which can be inexpensively manufactured at a high productivity while satisfying all of requirements regarding its adhesive strength, reflectance characteristic, electric resistance and total light transmittance. The antireflection film is formed by stacking silicon oxide films and indium tin oxide films on a base film in multilevels, wherein the thickness of the uppermost silicon oxide film of the antireflection film is thicker than the indium tin oxide film directly under the uppermost silicon oxide film, and the lowermost silicon oxide film, positioned at the interface with the base film, of the antireflection film is a SiOx film where the value x is in a range of 0.5 to 1.9.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: September 4, 2001
    Assignee: Sony Corporation
    Inventors: Hiroichi Ishikawa, Barret Lippey, Tomio Kobayashi, Yoshihiro Oshima, Shinobu Mitsuhashi, Masataka Yamashita, Yoshiharu Honjo, Koichi Kaneko
  • Publication number: 20010006324
    Abstract: A light-absorptive antireflection film comprising a light-absorptive film formed on a glass substrate containing pigment microparticles and having a physical thickness of not less than 10 nm and an antireflection multilayer film attenuating reflected light of incident light by interference of light, wherein at least one layer of the antireflection multilayer film is an electroconductive thin film having a surface resistance of not more than 1000 &OHgr;/□, and a display device including the same and methods of producing them.
    Type: Application
    Filed: December 22, 2000
    Publication date: July 5, 2001
    Applicant: Sony Corporation
    Inventors: Soya Araki, Takao Sumida, Masataka Yamashita, Hiroko Funahashi
  • Patent number: 5785890
    Abstract: A liquid crystal composition comprises at least three compounds represented by formulae (A), (B) and (C), respectively as in Claim 1. The compound of the formula (A) has an indan skeleton, the compound of the formula (B) has a quinoxaline skeleton, and the compound of the formula (C) has a pyrimidine skeleton or a benzothiazole skeleton and a terminal cyclic group comprising a cyclohexyl group or a phenyl group. The liquid crystal composition is effective in improving a display quality and drive characteristics of a liquid crystal device using the composition when the liquid crystal device is continuously driven for a long time.
    Type: Grant
    Filed: October 11, 1996
    Date of Patent: July 28, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Yamashita, Kazuharu Katagiri, Masahiro Terada, Shosei Mori, Syuji Yamada, Hiroshi Mizuno, Ikuo Nakazawa, Koji Noguchi
  • Patent number: 5744059
    Abstract: A liquid crystal composition contains a mesomorphic compound represented by the following formula (A): ##STR1## wherein R.sub.1 denotes a linear or branched alkyl group having 1-18 carbon atoms; X.sub.1 denotes a single bond, --O--, --CO--O-- or --O--CO--; X.sub.2 denotes a single bond, --OCH.sub.2 --, --CO--O-- or --O--CO--; n is an integer of 3-16; and A.sub.1, denotes ##STR2## and a mesomorphic compound represented by the following formula (B): ##STR3## wherein R.sub.2 denotes a linear or branched alkyl group having 1-18 carbon atoms; X.sub.3 and X.sub.4 independently denote a single bond, --O--, --CO--O-- or --O--CO--; m is an integer of 3-16; and A.sub.2 denotes ##STR4## The liquid crystal composition may preferably be formulated as a chiral smectic liquid crystal composition. The liquid crystal composition is useful in providing a liquid crystal device using the liquid crystal composition with a good alignment characteristic, a good drive characteristic, and a high contrast ratio.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: April 28, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Yamashita, Kazuharu Katagiri, Masahiro Terada, Shosei Mori, Syuji Yamada, Koji Noguchi
  • Patent number: 5733475
    Abstract: A liquid crystal composition contains a mesomorphic compound represented by the following formula (A): ##STR1## wherein R.sub.1 and R.sub.2 independently denote a linear or branched alkyl group having 1-18 carbon atoms; X.sub.1 denotes a single bond, --O--, --CO--O-- or --O--CO--; and A.sub.1 denotes ##STR2## and a mesomorphic compound represented by the following formula (B): ##STR3## wherein R.sub.3 denotes a linear or branched alkyl group having 1-18 carbon atoms; X.sub.2 denotes a single bond, --O--, --CO--O-- or --O--CO--; X.sub.3 denotes a single bond, --OCH.sub.2 --, --CO--O-- or --O--CO--; n is an integer of 3-16; and A.sub.2 denotes ##STR4## The liquid crystal composition may preferably be formulated as a chiral smectic liquid crystal composition. The liquid crystal composition is useful in providing a liquid crystal device using the liquid crystal composition with a good alignment characteristic, a good drive characteristic, and a high contrast ratio.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: March 31, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Yamashita, Masahiro Terada, Shosei Mori, Syuji Yamada, Hiroshi Mizuno, Ikuo Nakazawa
  • Patent number: 5728318
    Abstract: A liquid crystal composition is composed of at least three types of mesomorphic compounds. The liquid crystal composition may preferably contain a mesomorphic compound having an indan skeleton represented by the formula (1) or (3) and a mesomorphic compound having a terminal cyclic group represented by the formula (2) or (4). The liquid crystal composition may also preferably further contain an optically active compound to be formulated as a chiral smectic (or ferroelectric) liquid crystal composition. When the chiral smectic liquid crystal composition is disposed between a pair of electrode substrates provided with uniaxial alignment axes, the liquid crystal composition may preferably be placed in an alignment state in C1 uniform alignment, so that a resultant liquid crystal device provides a higher contrast ratio and a wider drive voltage margin.
    Type: Grant
    Filed: November 8, 1995
    Date of Patent: March 17, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Yamashita, Kazuharu Katagiri, Masahiro Terada, Shosei Mori, Syuji Yamada, Hiroshi Mizuno
  • Patent number: 5709819
    Abstract: A liquid crystal composition contains a mesomorphic compound represented by the following formula (A): ##STR1## wherein R.sub.1 denotes a linear or branched alkyl group having 1-18 carbon atoms; X.sub.1 denotes a single bond, --O--, --CO--O-- or --O--CO--; X.sub.2 denotes a single bond, --OCH.sub.2 --, --CO--O-- or --O--CO--; n is an integer of 3-16; and A.sub.1 denotes ##STR2## and a mesomorphic compound represented by the following formula (B): ##STR3## wherein R.sub.2 denotes a linear or branched alkyl group having 1-18 carbon atoms; X.sub.3 and X.sub.4 independently denote a single bond, --O--, --CO--O-- or --O--CO--; m is an integer of 3-16; and A.sub.2 denotes ##STR4## The liquid crystal composition may preferably be formulated as a chiral smectic liquid crystal composition. The liquid crystal composition is useful in providing a liquid crystal device using the liquid crystal composition with a good alignment characteristic, a good drive characteristic, and a high contrast ratio.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: January 20, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Yamashita, Kazuharu Katagiri, Masahiro Terada, Shosei Mori, Syuji Yamada, Koji Noguchi
  • Patent number: 5709818
    Abstract: A liquid crystal composition contains a mesomorphic compound represented by the following formula (A): ##STR1## wherein R.sub.1 and R.sub.2 independently denote a linear or branched alkyl group having 1-18 carbon atoms; X.sub.1 denotes a single bond, --O--, --CO--O-- or --O--CO--; and A.sub.1 denotes ##STR2## and a mesomorphic compound represented by the following formula (B): ##STR3## wherein R.sub.3 denotes a linear or branched alkyl group having 1-18 carbon atoms; X.sub.2 and X.sub.3 independently denote a single bond, --O--, --CO--O-- or --O--CO--; m is an integer of 3-16; and A.sub.2 denotes ##STR4## or ##STR5## The liquid crystal composition may preferably be formulated as a chiral smectic liquid crystal composition. The liquid crystal composition is useful in providing a liquid crystal device using the liquid crystal composition with a good alignment characteristic, a good drive characteristic, and a high and stable contrast ratio.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: January 20, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Yamashita, Masahiro Terada, Shosei Mori, Syuji Yamada, Hiroshi Mizuno, Ikuo Nakazawa, Koji Noguchi
  • Patent number: 5710433
    Abstract: A liquid crystal composition contains a mesomorphic compound represented by the following formula (A): ##STR1## wherein R.sub.1 and R.sub.2 independently denote a linear or branched alkyl group having 1-18 carbon atoms; X.sub.1 and X.sub.2 independently denote a single bond, --O--, --CO--O-- or --O--CO--; and A.sub.1 denotes a single bond, ##STR2## or ##STR3## and A.sub.2 denotes ##STR4## or ##STR5## and a mesomorphic compound represented by the following formula (B): ##STR6## wherein R.sub.3 denotes a linear or branched alkyl group having 1-18 carbon atoms; X.sub.3 and X.sub.4 independently denote a single bond, --O--, --CO--O-- or --O--CO--; m is an integer of 3-16; and A.sub.3 denotes ##STR7## or ##STR8## The liquid crystal composition may preferably be formulated as a chiral smectic liquid crystal composition.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: January 20, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Yamashita, Masahiro Terada, Shosei Mori, Syuji Yamada, Hiroshi Mizuno, Ikuo Nakazawa, Koji Noguchi
  • Patent number: 5631100
    Abstract: A secondary battery is comprising an organic electrolytic solution contained in a casing and, disposed therein, a positive electrode comprised of a lithium-containing composite metal oxide as a cathode active material and a negative electrode comprised of a carbonaceous material as an anode active material, wherein the positive and negative electrodes are separated through a separator disposed therebetween and wherein the organic electrolytic solution has a water content of from 5 ppm to 450 ppm.
    Type: Grant
    Filed: September 20, 1993
    Date of Patent: May 20, 1997
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Akira Yoshino, Yumiko Takizawa, Akira Koyama, Katsuhiko Inoue, Masataka Yamashita, Yasufumi Minato, Isao Kuribayashi
  • Patent number: 5629788
    Abstract: A liquid crystal device including: a pair of substrates and a chiral smectic liquid crystal disposed between the pair of substrates. Each of the pair of substrates has an electrode for applying a voltage to the liquid crystal. The pair of substrates is provided with respective uniaxial alignment axes extending in directions which are parallel to each other or intersect each other at a prescribed angle. The chiral smectic liquid crystal is placed in such an alignment state that the liquid crystal assumes at least two stable states and provides a pretilt angle .alpha. (degrees), a tilt angle H (degrees), an inclination angle .delta. (degrees) of the liquid crystal layer, and an apparent tilt angle .theta.a satisfying the following relationships (I) and (II) in a temperature range of 10.degree.-55.degree. C.:H<.alpha.+.delta. and .delta.<.alpha. (I), andH>.theta.a>H/2 (II).The liquid crystal provides a tilt angle H (degrees), an inclination angle .delta.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: May 13, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shosei Mori, Masataka Yamashita, Kazuharu Katagiri, Masahiro Terada, Syuji Yamada, Hiroshi Mizuno
  • Patent number: 5599479
    Abstract: A ferroelectric chiral smectic liquid crystal composition, comprising at least one optically active compound represented by the following formula (I): ##STR1## wherein R.sub.1 denotes a linear or branched alkyl group having 1-18 carbon atoms capable of having a subtituent; X.sub.1 denotes a single bond, ##STR2## Z denotes a single bond or ##STR3## denotes ##STR4## and n is an integer of 1-12; and at least one compound represented by the following formula (II): ##STR5## wherein R.sub.2 and R.sub.3 respectively denote a linear or branched optically inactive alkyl group having 1-18 carbon atoms capable of having an alkoxy group of 1-12 carbon atoms; X.sub.2 and X.sub.3 respectively denote a single bond, ##STR6## and p and q are respectively 0, 1 or 2 with proviso that both of p and q are not 0.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: February 4, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Shinjo, Takao Takiguchi, Hiroyuki Kitayama, Kazuharu Katagiri, Masataka Yamashita, Takeshi Togano, Masahiro Terada, Akio Yoshida, Yoshiko Kimura
  • Patent number: 5580489
    Abstract: A ferroelectric chiral smectic liquid crystal composition, comprising at least one compound represented by the following formula (I): ##STR1## wherein R.sub.1 denotes a linear or branched alkyl group having 1-18 carbon atoms capable of having a substituent, R.sub.2 denotes a linear or branched alkyl group having 1-14 carbon atoms capable of having a substituent; X.sub.1 and X.sub.2 respectively denote a single bond, ##STR2## m is 0-7; and n is 0 or 1; and at least one compound represented by the following formula (II): ##STR3## wherein R.sub.3 denotes a linear or branched alkyl group having 1-18 carbon atoms capable of having a substituent; R.sub.4 denotes a linear alkyl group having 1-10 carbon atoms; X.sub.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: December 3, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Shinjo, Takao Takiguchi, Hiroyuki Kitayama, Kazuharu Katagiri, Masataka Yamashita, Takeshi Togano, Masahiro Terada, Junko Sato
  • Patent number: 5573703
    Abstract: A ferroelectric liquid crystal device comprises:a pair of substrates comprising electrodes for applying a voltage, the pair of substrates having been subjected to a uniaxial orientation treatment, and being oriented at a distance opposite to each other such that the uniaxial orientation axes cross each other at a predetermined angle; the display device further comprising a liquid crystal material disposed between the exhibiting at least two stable states and pair of substrates, the liquid crystal material having a cone angle, a pretilt angle, a tilt angle and an apparent tilt angle, wherein:the liquid crystal material having an orientation state which satisfies the conditions represented by.THETA.<.alpha.+.delta.,.delta.<.alpha., and .THETA.>.THETA..sub..alpha. >.THETA./2in which .THETA. denotes the cone angle, .alpha. denotes the pretilt angle, .delta. denotes the tilt angle and .THETA..sub..alpha.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: November 12, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiro Terada, Shosei Mori, Masataka Yamashita
  • Patent number: 5514297
    Abstract: A ferroelectric chiral smectic liquid crystal composition, comprising at least one compound represented by the following formula (I): ##STR1## wherein R.sub.1 and R.sub.2 respectively denote a linear or branched alkyl group having 1-18 carbon atoms capable of having a substituent; X.sub.1 and X.sub.2 respectively denote a single bond, ##STR2## Y.sub.1 denotes --CH.sub.2 O-- or --OCH.sub.2 ; and m and n are respectively 1 or 2; and at least one compound represented by the following formula (II): ##STR3## wherein R.sub.3 and R.sub.4 respectively denote a linear or branched alkyl group having 1-18 carbon atoms capable of having a substituent, at least one of R.sub.3 and R.sub.4 being optically active; and; X.sub.3 and X.sub.
    Type: Grant
    Filed: June 16, 1993
    Date of Patent: May 7, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Shinjo, Takao Takiguchi, Hiroyuki Kitayama, Kazuharu Katagiri, Masahiro Terada, Takeshi Togano, Masataka Yamashita, Masanobu Asaoka
  • Patent number: 5512208
    Abstract: A ferroelectric chiral smectic liquid crystal composition, comprising at least one compound represented by the following formula (I): ##STR1## wherein R.sub.1 denotes a linear or branched alkyl group having 1-18 carbon atoms capable of having a substituent, R.sub.2 denotes a linear or branched alkyl group having 1-12 carbon atoms; X.sub.1 denotes a single bond, ##STR2## and at least one compound represented by the following formula (II): ##STR3## wherein R.sub.3 and R.sub.4 respectively denote a linear or branched alkyl group having 1-18 carbon atoms capable of having a substituent, at least one of R.sub.3 and R.sub.4 being optically active; and X.sub.2 and X.sub.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: April 30, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiro Terada, Takeshi Togano, Masataka Yamashita, Takashi Iwaki, Shosei Mori, Kenji Shinjo
  • Patent number: 5501818
    Abstract: A ferroelectric chiral smectic liquid crystal composition, comprising: at least one compound represented by the following formula (I): ##STR1## wherein R.sub.1 and R.sub.2 respectively denote a linear or branched alkyl group having 1-18 carbon atoms capable of having a substituent of C.sub.1 -C.sub.12 alkoxy group; X.sub.1 and X.sub.2 respectively denote a single bond, --O--, ##STR2## at least one compound represented by the following formula (II): ##STR3## wherein R.sub.3 and R.sub.4 respectively denote a linear or branched alkyl group having 1-18 carbon atoms capable of having a substituent; X.sub.3 and X.sub.4 respectively denote a single bond, --O--, ##STR4## Z.sub.1 denotes ##STR5## --CH.sub.2 O--, --OCH.sub.2 -- or a single bond; ##STR6## respectively denote ##STR7## denotes ##STR8## with proviso that at least one of ##STR9## and at least one compound represented by the following formula (III): ##STR10## wherein R.sub.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: March 26, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Shinjo, Takao Takiguchi, Hiroyuki Kitayama, Kazuharu Katagiri, Masataka Yamashita, Masahiro Terada, Takeshi Togano, Masanobu Asaoka