Patents by Inventor Yoshihiko Hirai

Yoshihiko Hirai 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).

  • Patent number: 8049848
    Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: November 1, 2011
    Assignee: NEC Corporation
    Inventors: Ken-ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
  • Publication number: 20110076353
    Abstract: Provided are processes such as a photo-imprinting process having high productivity without causing defacement of an expensive mold. In the photo-imprinting process of the invention, a pattern is transferred to a resin layer 2 by forming the resin layer 2 by applying a rework type photocrosslinking/curing resin to a substrate 1, pressing a mold 3 to the resin layer 2, irradiating the resin layer 2 with light having a first wavelength, and detaching the mold 3 from the resin layer 2. The rework type photocrosslinking/curing resin crosslinks/cures by irradiation with light having the first wavelength and is solubilized in a solvent by irradiation with light having a second wavelength shorter than the first wavelength or by heating. Therefore, even if grooves of the mold 3 are obstructed with the crosslinked/cured resin, the crosslinked/cured resin can be easily removed by resolubilizing it by, for example, irradiating the mold 3 with light having the second wavelength.
    Type: Application
    Filed: February 13, 2009
    Publication date: March 31, 2011
    Inventors: Masamitsu Shirai, Yoshihiko Hirai
  • Patent number: 7787078
    Abstract: An LCD device includes front substrate and rear substrate sandwiching therebetween an LC layer, front polarizing film and rear polarizing film disposed on the front side of the front substrate and the rear side of the rear substrate, respectively, and a reflecting film disposed on the rear side of the rear polarizing film. The distance between the LC layer and the reflecting film is set at 0.8 mm or smaller, to solve a parallax problem.
    Type: Grant
    Filed: May 19, 2005
    Date of Patent: August 31, 2010
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Yoshihiko Hirai, Kenichiro Naka
  • Publication number: 20100066964
    Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.
    Type: Application
    Filed: September 23, 2009
    Publication date: March 18, 2010
    Inventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
  • Patent number: 7612848
    Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: November 3, 2009
    Assignee: NEC Corporation
    Inventors: Ken-ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
  • Patent number: 7563709
    Abstract: A pattern formation method includes the steps of forming a flowable film made of a material with flowability; forming at least one of a concave portion and a convex portion provided on a pressing face of a pressing member onto the flowable film by pressing the pressing member against the flowable film; forming a solidified film by solidifying the flowable film, onto which the at least one of a concave portion and a convex portion has been transferred, through annealing at a first temperature with the pressing member pressed against the flowable film; and forming a pattern made of the solidified film burnt by annealing at a second temperature higher than the first temperature.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: July 21, 2009
    Assignee: Panasonic Corporation
    Inventors: Hideo Nakagawa, Masaru Sasago, Yoshihiko Hirai
  • Patent number: 7495734
    Abstract: An in-plane-switching liquid crystal display unit has a two-dimensional matrix of pixel regions each including a first auxiliary region and a second auxiliary region. When no electric field is applied, liquid crystal molecules in the first and second auxiliary regions are directed in respective orientations that lie at 90° with respect to each other. When a voltage is applied, the liquid crystal molecules are rotated in the same direction while maintaining their orientations in the first and second auxiliary regions at 90° with respect to each other. Alternatively, the liquid crystal molecules in the first and second auxiliary regions are directed in the same orientation when no electric field is applied, and when a voltage is applied, the liquid crystal molecules are rotated 15 opposite directions while maintaining their orientations in symmetric relationship.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: February 24, 2009
    Assignee: NEC Corporation
    Inventors: Teruaki Suzuki, Shinichi Nishida, Hideya Murai, Masayoshi Suzuki, Makoto Watanabe, Yoshihiko Hirai
  • Patent number: 7405785
    Abstract: A color filter substrate C includes an orientation film 56 provided on one surface of another glass substrate 10 and an optical compensation layer 35 provided on the other surface of the glass substrate 10 and formed from a plastic film. The two substrates are disposed such that the orientation films thereof oppose each other, and polarization plates 34 and 5 are disposed on the outer sides of the two substrates, and a liquid crystal layer 4 having a positive refractive index anisotropy is provided between the orientation films 23. The optical compensation layer 35 has a negative one axial refractive index anisotropy and can cancel a retardation produced in the liquid crystal layer 4 thereby to suppress white floating of a black display portion.
    Type: Grant
    Filed: August 8, 2006
    Date of Patent: July 29, 2008
    Assignee: NEC Corporation
    Inventors: Shinichi Nishida, Teruaki Suzuki, Masayoshi Suzuki, Makoto Watanabe, Eriko Fujimaki, Yoshihiko Hirai
  • Publication number: 20080045005
    Abstract: A pattern formation method includes the steps of forming a flowable film made of a material with flowability; forming at least one of a concave portion and a convex portion provided on a pressing face of a pressing member onto the flowable film by pressing the pressing member against the flowable film; forming a solidified film by solidifying the flowable film, onto which the at least one of a concave portion and a convex portion has been transferred, through annealing at a first temperature with the pressing member pressed against the flowable film; and forming a pattern made of the solidified film burnt by annealing at a second temperature higher than the first temperature.
    Type: Application
    Filed: October 9, 2007
    Publication date: February 21, 2008
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Hideo Nakagawa, Masaru Sasago, Yoshihiko Hirai
  • Patent number: 7294571
    Abstract: A pattern formation method includes the steps of forming a flowable film made of a material with flowability; forming at least one of a concave portion and a convex portion provided on a pressing face of a pressing member onto the flowable film by pressing the pressing member against the flowable film; forming a solidified film by solidifying the flowable film, onto which the at least one of a concave portion and a convex portion has been transferred, through annealing at a first temperature with the pressing member pressed against the flowable film; and forming a pattern made of the solidified film burnt by annealing at a second temperature higher than the first temperature.
    Type: Grant
    Filed: April 5, 2005
    Date of Patent: November 13, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hideo Nakagawa, Masaru Sasago, Yoshihiko Hirai
  • Patent number: 7291554
    Abstract: A method for forming a semiconductor device includes the steps of forming a flowable film made of an insulating material with flowability; forming a first concave portion in the flowable film through transfer of a convex portion of a pressing face of a pressing member by pressing the pressing member against the flowable film; forming a solidified film having the first concave portion by solidifying the flowable film through annealing at a first temperature with the pressing member pressed against the flowable film; forming a burnt film having the first concave portion by burning the solidified film through annealing at a second temperature higher than the first temperature; forming a second concave portion connected at least to the first concave portion in the burnt film by forming, on the burnt film, a mask having an opening for forming the second concave portion and etching the burnt film by using the mask; and forming a plug and a metal interconnect by filing the first concave portion and the second concav
    Type: Grant
    Filed: March 28, 2005
    Date of Patent: November 6, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hideo Nakagawa, Masaru Sasago, Yoshihiko Hirai
  • Patent number: 7273820
    Abstract: After a fluid film is formed by supplying a material with fluidity to the surface of a substrate formed with a stepped layer, the fluid film is pressed against the substrate by a pressing member having a planar pressing surface so that the surface of the fluid film is planarized. The fluid film is heated in this state and thereby solidified to form a solidified film having a planar surface.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: September 25, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hideo Nakagawa, Masaru Sasago, Masayuki Endo, Yoshihiko Hirai
  • Publication number: 20070202666
    Abstract: After a fluid film is formed by supplying a material with fluidity to the surface of a substrate formed with a stepped layer, the fluid film is pressed against the substrate by a pressing member having a planar pressing surface so that the surface of the fluid film is planarized. The fluid film is heated in this state and thereby solidified to form a solidified film having a planar surface.
    Type: Application
    Filed: April 6, 2007
    Publication date: August 30, 2007
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hideo Nakagawa, Masaru Sasago, Masayuki Endo, Yoshihiko Hirai
  • Publication number: 20070165172
    Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.
    Type: Application
    Filed: March 28, 2007
    Publication date: July 19, 2007
    Inventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
  • Patent number: 7245343
    Abstract: To provide a liquid crystal device a liquid crystal display having a high contrast over wide viewing angles while reducing the color distortion. A liquid crystal display device comprises a first substrate on which a plurality of pixel electrodes are formed, a second substrate on which an opposing electrode is formed, and a liquid crystal layer sandwiched between the first and second substrates, the second substrate further having thereon a plurality of protrusions, each of the protrusions being positioned at a substantially central portion of a corresponding one of the pixel electrodes.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: July 17, 2007
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Masayoshi Suzuki, Toshiya Ishii, Seiji Suzuki, Hiroaki Matsuyama, Kiyomi Kawada, Yoshihiko Hirai
  • Patent number: 7212270
    Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: May 1, 2007
    Assignee: NEC Corporation
    Inventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
  • Publication number: 20060274249
    Abstract: An active matrix liquid crystal display panel by which a good display characteristic can be obtained without suffering from gradation reversal over a wide visibility angle range. A liquid crystal layer 4 is formed such that the thickness-thereof varies in accordance with transmission wavelengths of color layers 6, 7 and 8 so that a very good display which does not exhibit any coloring in whichever direction it is viewed may be obtained. An active matrix substrate A includes a plurality of opposing electrodes 2, a plurality of pixel electrodes 3 parallel to the opposing electrodes 2, a thin film transistor, and an orientation film 23 all formed on a glass substrate 10. A color filter substrate C includes an orientation film 56 provided on one surface of another glass substrate 10 and an optical compensation layer 35 provided on the other surface of the glass substrate 10 and formed from a plastic film.
    Type: Application
    Filed: August 8, 2006
    Publication date: December 7, 2006
    Inventors: Shinichi Nishida, Teruaki Suzuki, Masayoshi Suzuki, Makoto Watanabe, Eriko Fujimaki, Yoshihiko Hirai
  • Patent number: 7139054
    Abstract: An active matrix liquid crystal display panel by which a good display characteristic can be obtained without suffering from gradation reversal over a wide visibility angle range. A liquid crystal layer 4 is formed such that the thickness thereof varies in accordance with transmission wavelengths of color layers 6, 7 and 8 so that a very good display which does not exhibit any coloring in whichever direction it is viewed may be obtained. An active matrix substrate A includes a plurality of opposing electrodes 2, a plurality of pixel electrodes 3 parallel to the opposing electrodes 2, a thin film transistor, and an orientation film 23 all formed on a glass substrate 10. A color filter substrate C includes an orientation film 56 provided on one surface of another glass substrate 10 and an optical compensation layer 35 provided on the other surface of the glass substrate 10 and formed from a plastic film.
    Type: Grant
    Filed: August 25, 2005
    Date of Patent: November 21, 2006
    Assignee: NEC Corporation
    Inventors: Shinichi Nishida, Teruaki Suzuki, Masayoshi Suzuki, Makoto Watanabe, Eriko Fujimaki, Yoshihiko Hirai
  • Patent number: 6987551
    Abstract: An in-plane-switching liquid crystal display unit has a two-dimensional matrix of pixel regions each including a first auxiliary region and a second auxiliary region. When no electric field is applied, liquid crystal molecules in the first and second auxiliary regions are directed in respective orientations that lie at 90° with respect to each other. When a voltage is applied, the liquid crystal molecules are rotated in the same direction while maintaining their orientations in the first and second auxiliary regions at 90° with respect to each other. Alternatively, the liquid crystal molecules in the first and second auxiliary regions are directed in the same orientation when no electric field is applied, and when a voltage is applied, the liquid crystal molecules are rotated opposite directions while maintaining their orientations in symmetric relationship.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: January 17, 2006
    Assignee: NEC Corporation
    Inventors: Teruaki Suzuki, Shinichi Nishida, Hideya Murai, Masayoshi Suzuki, Makoto Watanabe, Yoshihiko Hirai
  • Publication number: 20050280755
    Abstract: An active matrix liquid crystal display panel by which a good display characteristic can be obtained without suffering from gradation reversal over a wide visibility angle range. A liquid crystal layer 4 is formed such that the thickness thereof varies in accordance with transmission wavelengths of color layers 6, 7 and 8 so that a very good display which does not exhibit any coloring in whichever direction it is viewed may be obtained. An active matrix substrate A includes a plurality of opposing electrodes 2, a plurality of pixel electrodes 3 parallel to the opposing electrodes 2, a thin film transistor, and an orientation film 23 all formed on a glass substrate 10. A color filter substrate C includes an orientation film 56 provided on one surface of another glass substrate 10 and an optical compensation layer 35 provided on the other surface of the glass substrate 10 and formed from a plastic film.
    Type: Application
    Filed: August 25, 2005
    Publication date: December 22, 2005
    Inventors: Shinichi Nishida, Teruaki Suzuki, Masayoshi Suzuki, Makoto Watanabe, Eriko Fujimaki, Yoshihiko Hirai