Patents by Inventor Osamu Itoh

Osamu Itoh 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: 20050264728
    Abstract: A low cost transflective type liquid crystal display is provided which can display a bright image with high contrast under both indoor and outdoor illumination environments. The liquid crystal display performing transmission type display and reflection type display, includes: a plurality of pixels surrounded on a substrate 10 by a plurality of gate electrodes 11 and a plurality of source electrodes 15 arranged perpendicularly to the gate electrodes; a switching element 19 arranged in each pixel and disposed neat at the intersection between each gate electrode and each source electrode; and a pixel electrode 16 connected to the switching element, wherein the pixel electrode is constituted of a transparent conductive layer and a conductive member 17 having a light reflection function and electrically connected to the transparent conductive layer.
    Type: Application
    Filed: September 20, 2002
    Publication date: December 1, 2005
    Inventors: Katsuyuki Funahata, Makoto Abe, Osamu Itoh, Shinichi Komura
  • Patent number: 6713492
    Abstract: Drugs or reagents containing as the active ingredient N-acyloxylated cycloalkyl compounds represented by general formula (I): wherein A is optionally substituted C4 or C5 cycloalkyl which may have one double bond in the ring; and R is C1-C3 alkyl or phenyl). The above compounds are hydroxyamine derivatives functioning as spin trapping agents and can rapidly react with free radicals or active oxygen in an objective organ in spite of their being excellent in stability during the preparation or administration thereof.
    Type: Grant
    Filed: May 24, 2001
    Date of Patent: March 30, 2004
    Assignees: Daiichi Radioisotope Laboratories, Ltd., Yamagata Public Corporation for the Development of Industry
    Inventors: Osamu Itoh, Heitaro Obara, Hidekatsu Yokoyama, Masaaki Aoyama
  • Publication number: 20040021818
    Abstract: A liquid crystal display apparatus having a liquid crystal panel including a pair of substrates, a plurality of electrodes formed on at least one of the pair of substrates and a liquid crystal layer sandwiched between the pair of substrates, and a light source provided on one surface of the liquid crystal panel. An electric field in the liquid crystal layer produced by the plurality of electrodes is predominantly in parallel with surfaces of the pair of substrates. The light source has a luminous characteristic with a first chromaticity and the liquid crystal panel has a characteristic of spectral transmittance with a second chromaticity different from the first chromaticity so as to compensate for the color of the light source.
    Type: Application
    Filed: July 30, 2003
    Publication date: February 5, 2004
    Inventors: Yuka Utsumi, Katsumi Kondo, Ikuo Hiyama, Osamu Itoh, Masahito Ohe, Kazuhiko Yanagawa, Keiichiro Ashizawa
  • Patent number: 6660863
    Abstract: The present invention relates to a process for synthesizing an anhydroecgonine derivative without using cocaine as a starting material, and a process for synthesizing a phenyltropane derivative by using said anhydroecgonine derivative as an intermediate for the synthesis. The present invention provides a process for synthesizing an anhydroecgonine derivative which comprises reacting a cycloheptatriene derivative represented by the formula (1): with a primary amine, a salt thereof or ammonia in the presence of a base to obtain an anhydroecgonine derivative, and a process for synthesizing a phenyltropane derivative by using said anhydroecgonine derivative. In the formula (1), n is an integer of 0 or 1; and R1 is a cyano group in the case of n being 0, and R1 is selected from an alkyl group and an aralkyl group in the case of n being 1.
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: December 9, 2003
    Assignee: Nihon Medi-Physics Co., Ltd.
    Inventors: Kyoko Okano, Osamu Itoh
  • Patent number: 6621538
    Abstract: A liquid crystal display apparatus having a liquid crystal panel including a pair of substrates, a plurality of electrodes formed on at least one of the pair of substrates and a liquid crystal layer sandwiched between the pair of substrates, and a light source provided on one surface of the liquid crystal panel. An electric field in the liquid crystal layer produced by the plurality of electrodes is predominantly in parallel with surfaces of the pair of substrates. The light source has a luminous characteristic with a first chromaticity and the liquid crystal panel has a characteristic of spectral transmittance with a second chromaticity different from the first chromaticity so as to compensate for the color of the light source.
    Type: Grant
    Filed: May 18, 2000
    Date of Patent: September 16, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Yuka Utsumi, Katsumi Kondo, Ikuo Hiyama, Osamu Itoh, Masahito Ohe, Kazuhiko Yanagawa, Keiichiro Ashizawa
  • Patent number: 6596868
    Abstract: The present invention relates to a process for synthesizing an anhydroecgonine derivative without using cocaine as a starting material, and a process for synthesizing a phenyltropane derivative by using said anhydroecgonine derivative as an intermediate for the synthesis. The present invention provides a process for synthesizing an anhydroecgonine derivative which comprises reacting a cycloheptatriene derivative represented by the formula (1): with a primary amine, a salt thereof or ammonia in the presence of a base to obtain an anhydroecgonine derivative, and a process for synthesizing a phenyltropane derivative by using said anhydroecgonine derivative. In the formula (1), n is an integer of 0 or 1; and R1 is a cyano group in the case of n being 0, and R1 is selected from an alkyl group and an aralkyl group in the case of n being 1.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: July 22, 2003
    Assignee: Nihon Medi-Physics Co., Ltd.
    Inventors: Kyoko Okano, Osamu Itoh
  • Publication number: 20030109708
    Abstract: The present invention relates to a process for synthesizing an anhydroecgonine derivative without using cocaine as a starting material, and a process for synthesizing a phenyltropane derivative by using said anhydroecgonine derivative as an intermediate for the synthesis.
    Type: Application
    Filed: August 2, 2002
    Publication date: June 12, 2003
    Applicant: NIHON MEDI-PHYSICS CO., LTD.
    Inventors: Kyoko Okano, Osamu Itoh
  • Patent number: 6362862
    Abstract: A liquid crystal display featuring excellent visibility with both good brightness and a high contrast ratio uses a projection optical system in which a polarizing plate, a first phase plate and a second phase plate in which the retardation of each of the phase plates and a gradient of wavelength dispersion of the retardation can be freely set, a liquid crystal layer, and a reflection plate are arranged in parallel and a transmitted light is reflected by the reflection plate. A gradient of one of the phase plates is set to an extremely steep gradient, a gradient of the other phase plate is set to an extremely flat gradient, and the wavelength dispersion of a retardation composite value obtained from the liquid crystal layer and the two phase plates is approximated to a retardation curve expressed by a relational expression of (0.25+0.5n)&lgr;, where (n) is an integer and &lgr; is a wavelength (nm) of the transmitted light.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: March 26, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Osamu Itoh, Shinichi Komura, Ikuo Hiyama, Shoichi Hirota, Masaya Adachi
  • Publication number: 20010020096
    Abstract: The present invention relates to a process for synthesizing an anhydroecgonine derivative without using cocaine as a starting material, and a process for synthesizing a phenyltropane derivative by using said anhydroecgonine derivative as an intermediate for the synthesis.
    Type: Application
    Filed: February 2, 2001
    Publication date: September 6, 2001
    Inventors: Kyoko Okano, Osamu Itoh
  • Patent number: 6190637
    Abstract: The present invention provides a method for preparing [F-18]-fluoride ion which comprises the step of bringing [O-18]-enriched water containing [F-18]-fluoride ion formed by proton irradiation of [O-18]-enriched water into contact with a strongly acidic cation exchange resin to remove impurity cations, the step of then bringing the [O-18]-enriched water containing [F-18]-fluoride ion treated above into contact with a weakly basic anion exchange resin to make [F-18]-fluoride ion adsorbed to the resin and, along therewith, to recover the [O-18]-enriched water which has passed through the resin, and the step of eluting and collecting the [F-18]-fluoride ion adsorbed to the weakly basic anion exchange resin.
    Type: Grant
    Filed: March 11, 1999
    Date of Patent: February 20, 2001
    Assignee: Nihon Medi-Physics Co., Ltd.
    Inventors: Sento Ino, Masahiko Tamura, Osamu Itoh
  • Patent number: 6137560
    Abstract: A liquid crystal display apparatus includes a liquid crystal panel having a pair of substrates, a plurality of electrodes formed on at least one of the pair of substrates and a liquid crystal layer sandwiched between the pair of substrates, and a light source provided on the back surface of the liquid crystal panel. The light source has the luminous characteristic with the chromaticity of a warm color family, and the liquid crystal panel has a spectral transmission characteristic with the chromaticity of a cold color family, whereby the color of the light source can be compensated.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: October 24, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Yuka Utsumi, Katsumi Kondo, Ikuo Hiyama, Osamu Itoh, Masahito Ohe, Kazuhiko Yanagawa, Keiichiro Ashizawa
  • Patent number: 6104460
    Abstract: A reflective liquid crystal display apparatus realizing a bright image display without using a backlight is provided. In this reflective liquid crystal display apparatus, a reflecting electrode having a scattering property and a directional property is manufactured using a small number of steps. A pattern of unevenness, such as a polygonal pattern, a cylindrical pattern, and the like, is formed on an insulating substrate utilizing a material layer formed for composing switching devices. By causing the unevenness of the pattern to influence the surface contour of the reflecting electrodes, it becomes possible to give both a scattering property and a directional property to the surface of the reflecting electrodes.
    Type: Grant
    Filed: October 27, 1998
    Date of Patent: August 15, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Makoto Abe, Ikuo Hiyama, Makoto Tsumura, Osamu Itoh
  • Patent number: 6094240
    Abstract: In a polarizing beam converter, a uniaxial anisotropic transparent medium is inserted and supported between isotropic transparent media; and an optical axis of said uniaxial anisotropic transparent medium is arranged almost perpendicular to an incident light beam or an incident face of the incident light beam at an interface between the isotropic transparent medium and the uniaxial anisotropic transparent medium. A half wavelength plate is placed with an inclined angle of 45.degree. relative to a polarization axis for either of a reflected light component or a transmitted light component at the interface. The retractive index of the isotropic medium, n.sub.p, and a refraction index n.sub.e greater than n.sub.0, of the uniaxial anisotropic transparent medium are substantially equal to one another. Further, at the interface of the isotropic medium and the uniaxial anisotropic transparent medium, an incident angle satisfying sin(.theta.).gtoreq.n.sub.0 /n.sub.p for satisfying a total reflection angle.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: July 25, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Ikuo Hiyama, Osamu Itoh, Katsumi Kondo, Masaya Adachi
  • Patent number: 6054392
    Abstract: A method for forming a contact hole in an active matrix substrate, the method comprising steps of: (a) depositing an insulating film covering a first electrode provided on a substrate and the substrate; (b) forming a contact hole by patterning said insulating film by means of dry etching; and (c) forming a second electrode, and contacting the second electrode with the first electrode; wherein in the step (b) after forming a contact hole by dry etching, a surface treatment by plasma etching or reactive ion etching with oxygen gas under a condition in which a pressure P is in a range of 100 Pa to 400 Pa is performed.
    Type: Grant
    Filed: December 3, 1997
    Date of Patent: April 25, 2000
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display, Inc.
    Inventors: Masashi Ura, Shoichi Takanabe, Nobuhiro Nakamura, Yukio Endoh, Osamu Itoh
  • Patent number: 5973759
    Abstract: A liquid crystal projector having a high contrast ratio has an optical system including, for each color, a liquid crystal display device, a drive device for driving the liquid crystal display device and a polarization device, and a light source. The liquid crystal display device has active devices connected to reflective electrodes. Driving voltages applied to pixels have different polarities in every row. The liquid crystal layer is aligned at an angle from 75.degree. to 105.degree. to the direction of an electric field between electrodes. An optical rotator is provided between the liquid crystal display device and the polarization device.
    Type: Grant
    Filed: August 19, 1998
    Date of Patent: October 26, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Osamu Itoh, Shoichi Hirota, Masaya Adachi
  • Patent number: 5963826
    Abstract: A method of providing a contact hole including (a) depositing a first conductive film on a substrate and patterning the first conductive film to form a first electrode line, (b) depositing an insulating film on the first electrode line and the substrate, (c) forming a contact hole in the insulating film over a top surface of the first electrode line, and (d) depositing a second conductive film on the insulating film and the contact hole and patterning the second conductive film to form a second electrode line, wherein a surface of the first conductive film is subjected to an oxidizing operation in step (a) so that a contact resistance of the contact hole is lowered.
    Type: Grant
    Filed: December 1, 1997
    Date of Patent: October 5, 1999
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display Inc.
    Inventors: Shoichi Takanabe, Masashi Ura, Nobuhiro Nakamura, Osamu Itoh, Yukio Endoh
  • Patent number: 5841496
    Abstract: A reflective liquid crystal display device has a liquid crystal cell formed by laminating upper and lower orientation layers 11 and 21, upper and lower electrodes 14 and 24, upper and lower substrates 12 and 22, and upper and lower polarizers 13 and 23 arranged in order above and below a liquid crystal layer 10 so that they may face their counterparts respectively. The liquid crystal cell is provided with viewing angle dependence so that the light transmission ratio of the dark display section to the bright display section for the light incident at the required angle may be less than 2 at the required azimuth angle of the liquid crystal cell, and the direction of the required azimuth angle is aligned with the direction of the main light source incident into the liquid crystal cell.
    Type: Grant
    Filed: April 2, 1996
    Date of Patent: November 24, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Osamu Itoh, Katsumi Kondo, Ikuo Hiyama, Tatsuhisa Fujii, Naoki Kikuchi, Jun-ichi Hirakata
  • Patent number: 5835175
    Abstract: A color STN-LCD having preferable display quality and decreased manufacturing cost uses a liquid crystal display apparatus which includes a liquid crystal layer having a twist angle in a range from 200.degree. and less than 360.degree., a retardation of the liquid crystal layer in a range of 0.80 .mu.m.about.0.90 .mu.m, an azimuth of transmittance axis of the upper polarizer in a range of 30.degree..about.70.degree., an azimuth of the transmittance axis of the lower polarizer in a range of 60.degree..about.90.degree., an azimuth of the slow axis of the upper phase plate in a range of 150.degree..about.190.degree., an azimuth of the slow axis of the lower phase plate in a range of 30.degree..about.80.degree., a retardation of the upper phase plate at a wave length of 550 nm in a range of 200 nm.about.300 nm, and a retardation of the lower phase plate at a wave length of 550 nm in a range of 500 nm.about.620 nm.
    Type: Grant
    Filed: January 5, 1996
    Date of Patent: November 10, 1998
    Assignees: Hitachi, Ltd., Hitachi Device Engineering, Co. Ltd.
    Inventors: Osamu Itoh, Katsumi Kondo, Junichi Hirakata, Yuka Utsumi, Naoki Kikuchi, Yoshiaki Nakamura
  • Patent number: 5828431
    Abstract: A reflective-type display device having a light modulating layer, including a host dispersed with light scatterers, which is held between two transparent electrodes; and a light absorbing layer disposed in back of the light modulating layer. The size of each light scatterer or the nearest distance between the adjacent light scatterers is nearly equivalent to the wavelength of incident light at least in two-dimensional directions. The refractive index ratio relative to incident light between the light scatterers and host is changed from 1 to 1.5 or more depending on the magnitude of a voltage applied across the electrodes.
    Type: Grant
    Filed: July 27, 1995
    Date of Patent: October 27, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Masahiko Ando, Tohru Sasaki, Masaaki Kitajima, Osamu Itoh, Yoshihito Maeda, Yoshiharu Nagae, Tatsuya Sugita
  • Patent number: 5818554
    Abstract: A reflective liquid crystal display apparatus has a liquid crystal display part composed of at least a liquid crystal layer and a pair of polarizers holding the liquid crystal layer therebetween, for display of bright and dark states in a mode of transmitting and shielding external light in a direction approximately normal to a display plane, and a reflecting part for reflecting the external light which has been transmitted through the liquid crystal display part. The liquid crystal display part has a property where it can transmit external light in a designated direction other than in a direction approximately normal to the display plane even in a mode of shielding the external light, and the reflecting part reflects the external light received in the designated direction so as to transmit the external light once again through the liquid crystal display part in a direction approximately normal to the display plane.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: October 6, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Ikuo Hiyama, Akira Arimoto, Katsumi Kondo, Osamu Itoh, Tatsuhisa Fujii