Patents by Inventor Takehisa Sakurai

Takehisa Sakurai 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: 20110063558
    Abstract: The present invention provides a liquid crystal display device which is capable of achieving excellent wide-viewing-angle characteristics and rapid responsiveness, and is capable of displaying by a display mode which does not require operation for initial bend transition. The present invention relates to one embodiment of a liquid crystal display device including: two substrates at least one of which is transparent; and a p-type nematic liquid crystal disposed between the two substrates, the p-type nematic liquid crystal being aligned perpendicular to the surfaces of the two substrates when no voltage is applied, at least one of the two substrates having a comb-shaped electrode, and the comb-shaped electrode satisfying the relationship (S+1.7)/(S+L)?0.7, wherein L represents an electrode width and S represents an electrode spacing.
    Type: Application
    Filed: May 29, 2009
    Publication date: March 17, 2011
    Inventors: Shoichi Ishihara, Shuichi Kozaki, Takehisa Sakurai, Mitsuhiro Murata
  • Publication number: 20100002158
    Abstract: A liquid crystal panel (10) includes a liquid crystal layer formed with a p-type liquid crystal. The liquid crystal layer exhibits homogeneous orientation while no voltage is applied. Further, an electric field is applied to the liquid crystal layer in a direction same as dipole moments (?) of liquid crystal molecules (3a) to which no voltage is applied. With these arrangements, it is possible to provide a liquid crystal panel and a liquid crystal display device, each of which adopts a new display mode that can achieve a wide viewing angle equivalent to an IPS mode, can achieve a high-speed response like an OCB mode or exceeding the OCB mode, and does not require an initial operation for orientation conversion to the bend orientation.
    Type: Application
    Filed: January 31, 2008
    Publication date: January 7, 2010
    Inventors: Shoichi Ishihara, Takehisa Sakurai, Shuichi Kozaki
  • Publication number: 20090316098
    Abstract: A liquid crystal panel includes: a p-type liquid crystal material sandwiched by a pair of substrates and comb-teeth shape electrodes for applying, to the p-type liquid crystal material, an electric field parallel to a substrate surface. The p-type liquid crystal material is aligned vertically with respect to the substrate surface at the time when no electric field is applied. The comb-teeth shape electrodes have an electrode width of 5 ?m or less, and an electrode spacing of 15 ?m or less. A product of a dielectric constant anisotropy ?? and a refractive index anisotropy ?n of the p-type liquid crystal material is 1.3 or more and 3.1 or less.
    Type: Application
    Filed: June 17, 2009
    Publication date: December 24, 2009
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shoichi ISHIHARA, Takehisa Sakurai, Shuichi Kozaki
  • Patent number: 6133157
    Abstract: In a method for selectively etching a second silicon layer of a multilayer structure which includes a first silicon layer and the second silicon layer formed on the first silicon layer and doped with impurities according to the present invention, the second silicon layer is selectively etched by using an etching gas including freon-14 gas and a gas selected from a group composed of hydrogen chloride gas and chloride gas.
    Type: Grant
    Filed: July 21, 1998
    Date of Patent: October 17, 2000
    Assignee: Sharp Kabushike Kaisha
    Inventors: Takehisa Sakurai, Hitoshi Ujimasa, Katsuhiro Kawai, Atsushi Ban, Masaru Kajitani, Mikio Katayama
  • Patent number: 5783494
    Abstract: In a method for selectively etching a second silicon layer of a multilayer structure which includes a first silicon layer and the second silicon layer formed on the first silicon layer and doped with impurities according to the present invention, the second silicon layer is selectively etched by using an etching gas including freon-14 gas and a gas selected from a group composed of hydrogen chloride gas and chlorine gas.
    Type: Grant
    Filed: September 7, 1995
    Date of Patent: July 21, 1998
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takehisa Sakurai, Hitoshi Ujimasa, Katsuhiro Kawai, Atsushi Ban, Masaru Kajitani, Mikio Katayama
  • Patent number: 5538905
    Abstract: A method for forming a transparent conductive film includes the steps of: forming an ITO film on a substrate by sputtering a target including oxygen atoms, indium atoms, and tin atoms under an inert gas atmosphere; patterning the ITO film by selectively removing a prescribed portion of the ITO film using an etching method; and doping the patterned ITO film with oxygen using an ion shower doping method, thereby forming the transparent conductive film from the ITO film.
    Type: Grant
    Filed: October 20, 1993
    Date of Patent: July 23, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yukiya Nishioka, Yukinobu Nakata, Hidenori Negoto, Yoshinori Shimada, Takehisa Sakurai, Mikio Katayama
  • Patent number: 5471070
    Abstract: A thin-film transistor circuit for a logic gate circuit includes: an amorphous silicon layer; a driver transistor having a source region, a drain region, and a channel region, the source, drain, and channel regions being formed in the amorphous silicon layer; and a load device formed in the amorphous silicon layer and made of n.sup.- amorphous silicon, the load device being connected to the driver transistor.
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: November 28, 1995
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshinori Shimada, Naofumi Kondo, Takehisa Sakurai, Yoshiharu Kataoka, Manabu Takahama, Mikio Katayama
  • Patent number: 5287206
    Abstract: An active matrix display device which includes a pair of insulating substrates, a first group of buses formed on one of the sides of the insulating substrates, a second group of buses crossing the first group of buses, conductive film wirings formed on the second group of buses, wherein the width of each conductive film wiring at stepped portions of the first group of buses is not smaller than that of the conductive film wirings located out of the stepped portions.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: February 15, 1994
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yuzuru Kanemori, Masaya Okamoto, Katsuhiro Kawai, Mitsuaki Hirata, Takehisa Sakurai, Hideji Marumoto