Patents by Inventor Takayuki Nakao

Takayuki Nakao 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: 7764264
    Abstract: The present invention provides a display device that has a driving circuit including a single channel bidirectional shift register with which the circuit scale can be reduced without increasing the number of elements. The driving circuit includes a single channel bidirectional shift register. This single channel bidirectional shift register has an RS flip-flop circuit. The RS flip-flop circuit includes a first transistor having a first electrode connected to an output terminal and having a second electrode to which a second scanning direction control signal is applied and a second transistor having a first electrode connected to an output terminal and having a second electrode to which a first scanning direction control signal is applied.
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: July 27, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Takayuki Nakao, Masahiro Maki, Hideo Sato, Toshio Miyazawa
  • Publication number: 20100177073
    Abstract: A display device is provided which includes a common electrode drive circuit having the single channel constitution which can miniaturize a circuit scale without increasing elements compared to a conventional display device. A display device includes a plurality of pixels and a common electrode drive circuit. The common electrode drive circuit includes a plurality of basic circuits, wherein the basic circuit includes a first circuit which latches a first input signal at a point of time that a clock signal is changed to a first voltage level from a second voltage level; a second circuit which latches a second input signal at the point of time that the clock signal is changed to the first voltage level from the second voltage level; a first switching circuit which is turned on based on the first circuit and a second switching circuit which is turned on based on the second circuit.
    Type: Application
    Filed: March 23, 2010
    Publication date: July 15, 2010
    Inventors: Takayuki NAKAO, Hideo Sato, Masahiro Maki, Toshio Miyazawa
  • Publication number: 20100171739
    Abstract: The present invention provides a display device which includes a common electrode drive circuit having the single channel constitution which can miniaturize a circuit scale without increasing elements compared to a conventional display device. A display device includes a plurality of pixels and a common electrode drive circuit. The common electrode drive circuit includes a plurality of basic circuits, wherein the basic circuit includes a first circuit which latches a first input signal at a point of time that a clock signal is changed to a first voltage level from a second voltage level; a second circuit which latches a second input signal at the point of time that the clock signal is changed to the first voltage level from the second voltage level; a first switching circuit which is turned on based on the first circuit and a second switching circuit which is turned on based on the voltage second circuit.
    Type: Application
    Filed: January 8, 2010
    Publication date: July 8, 2010
    Inventors: Takayuki NAKAO, Hideo Sato, Masahiro Maki, Toshio Miyazawa
  • Patent number: 7724231
    Abstract: The present invention provides a display device which includes a common electrode drive circuit having the single channel constitution which can miniaturize a circuit scale without increasing elements compared to a conventional display device. A display device includes a plurality of pixels and a common electrode drive circuit. The common electrode drive circuit includes a plurality of basic circuits, wherein the basic circuit includes a first circuit which latches a first input signal at a point of time that a clock signal is changed to a first voltage level from a second voltage level; a second circuit which latches a second input signal at the point of time that the clock signal is changed to the first voltage level from the second voltage level; a first switching circuit which is turned on based on the first circuit; and a second switching circuit which is turned on based on the the second circuit.
    Type: Grant
    Filed: March 21, 2006
    Date of Patent: May 25, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Takayuki Nakao, Hideo Sato, Masahiro Maki, Toshio Miyazawa
  • Publication number: 20100083875
    Abstract: There is provided an aluminum pigment including an aluminum particle having a film formed on a surface thereof, wherein the film contains a metallic amine salt and the metallic amine salt is represented by the compositional formula RmHnN+?O-M(=O)2—OH (wherein M represents a metal element, R represents a hydrocarbon chain optionally having a substituent, m represents an integer of 1 or more, and n represents an integer satisfying n=4-m).
    Type: Application
    Filed: April 28, 2008
    Publication date: April 8, 2010
    Inventor: Takayuki Nakao
  • Patent number: 7675592
    Abstract: The manufacturing yield of transflective liquid crystal display devices is to be enhanced.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: March 9, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Takahiro Ochiai, Takayuki Nakao, Daisuke Sonoda, Hidekazu Miyake, Toshio Miyazawa, Masahiro Maki, Tohru Sasaki
  • Patent number: 7652653
    Abstract: The present invention relates to a display device, and more particularly to a display device which includes a drive circuit having a CMOS shift register which is constituted of a CMOS circuit.
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: January 26, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Takayuki Nakao, Hideo Sato, Masahiro Maki
  • Patent number: 7557376
    Abstract: The present invention provides an active matrix display device capable of raising its integration density by reducing the drive circuit area on the active matrix substrate. A semiconductor film presents in the boundary between a quasi-strip crystalline semiconductor film and another semiconductor film is used to form conductive lines, resistors, source/drain electrodes and the like which are respectively connected to thin film transistors formed using the quasi-strip crystalline semiconductor film.
    Type: Grant
    Filed: September 25, 2006
    Date of Patent: July 7, 2009
    Assignee: Hitachi Displays, Ltd.
    Inventors: Masahiro Maki, Hideo Sato, Takayuki Nakao, Toshihiko Itoga
  • Publication number: 20090017082
    Abstract: This invention provides a colored metallic pigment, which can develop a variety of colors and varied interference colors while maintaining good lightfastness, weatherfastness and hiding power, a process for producing the same, a coating composition containing the colored metallic pigment and capable of providing a coating film having excellent finished appearance, and a cosmetic preparation containing the colored metallic pigment, having excellent hiding power, and capable of providing sharp hue. The colored metallic pigment comprises at least a metallic pigment, an amorphous silicon oxide film layer provided on the surface of the metallic pigment, a metal layer provided on the surface of the amorphous silicon oxide film layer, and metallic particles provided on the surface of the metal layer. The metallic particles are provided so as to directly cover a part of the surface of the metal layer.
    Type: Application
    Filed: February 9, 2007
    Publication date: January 15, 2009
    Inventors: Taro Morimitsu, Takayuki Nakao, Yoshiki Hashizume, Hideaki Minamiyama, Masakazu Nakamura
  • Publication number: 20080198150
    Abstract: A display device wherein a common voltage generating circuit selectively outputs a high- or a low-potential-side common voltage to common electrodes in response to an alternating signal; a complement circuit which selectively outputs display data or complement data of display data in response to the alternating signal; a storage circuit; a reference data generating circuit; a ramp voltage generating circuit; a plurality of comparing circuits which compare data stored in the storage circuit and the reference data generated by the reference data generating circuit; and a plurality of sampling circuits which sample the ramp voltage in response to comparison results of the comparing circuits and output the sampled ramp voltage as a video signal voltage to respective video lines, wherein a inclination of the ramp voltage is the same when the storage circuit stores both the display data and the complement data of the display data.
    Type: Application
    Filed: April 21, 2008
    Publication date: August 21, 2008
    Inventors: Hideo SATO, Tomohiko SATO, Masahiro MAKI, Takayuki NAKAO
  • Patent number: 7375725
    Abstract: Gamma correction of a video signal voltage applied to respective pixels of a display device can be accomplished without modulating a ramp voltage. The display device includes a common voltage generating circuit which selectively outputs a high-potential-side common voltage or a low-potential-side common voltage to common electrodes in response to an alternating signal, a data storage circuit, a reference data generating circuit which, a ramp voltage generating circuit, a plurality of comparing circuits which compare data stored in the data storage circuit and the reference data generated by the reference data generating circuit, and a plurality of sampling circuits which sample the ramp voltage generated by the ramp voltage generating circuit in response to comparison results of the comparing circuits and output the sampled ramp voltage as a video signal voltage to respective video lines. The reference data generated by the reference data generating circuit is changed non-linearly with respect to time.
    Type: Grant
    Filed: November 29, 2004
    Date of Patent: May 20, 2008
    Assignee: Hitachi Displays, Ltd.
    Inventors: Hideo Sato, Tomohiko Sato, Masahiro Maki, Takayuki Nakao
  • Publication number: 20080007679
    Abstract: The manufacturing yield of transflective liquid crystal display devices is to be enhanced.
    Type: Application
    Filed: June 21, 2007
    Publication date: January 10, 2008
    Inventors: Takahiro Ochiai, Takayuki Nakao, Daisuke Sonoda, Hidekazu Miyake, Toshio Miyazawa, Masahiro Maki, Tohru Sasaki
  • Publication number: 20070241332
    Abstract: A liquid crystal display device having a liquid crystal display panel includes a first substrate, a second substrate, and liquid crystal interposed between the first and second substrates. The first substrate includes an active element, a first insulating film formed on the active element, a plurality of first electrodes disposed on the first insulating film, a second insulating film disposed on the first electrodes, and a pixel electrode disposed on the second insulating film. The pixel electrode is electrically coupled to the active element via a portion defining a contact hole formed in a portion defining a clearance between the plurality of first electrodes.
    Type: Application
    Filed: April 5, 2007
    Publication date: October 18, 2007
    Inventors: Takahiro Ochiai, Takayuki Nakao, Toshio Miyazawa, Masahiro Maki, Tohru Sasaki
  • Patent number: 7277078
    Abstract: A display device, which is capable of performing gamma correction of a video signal voltage applied to respective pixels, includes a drive circuit which supplies a video signal voltage to a plurality of video signal lines. The drive circuit includes a storage circuit which stores display data inputted from the outside, a reference data generating circuit which generates reference data, a ramp voltage generating circuit, a plurality of comparing circuits which compare display data stored in the storage circuit and reference data generated by the reference data generating circuit, and a plurality of sampling circuits which sample the ramp voltage based on a result of comparison by the comparing circuit and which output the sampled ramp voltage as a video signal voltage to respective video signal lines, wherein the reference data generated by the reference data generating circuit is changed non-linearly with respect to time.
    Type: Grant
    Filed: December 24, 2003
    Date of Patent: October 2, 2007
    Assignee: Hitachi Displays, Ltd.
    Inventors: Hideo Sato, Tomohiko Sato, Norio Mamba, Masahiro Maki, Takayuki Nakao
  • Publication number: 20070194973
    Abstract: The present invention provides a display device which includes a drive circuit having a CMOS shift register circuit constituted of a simple CMOS circuit. A drive circuit includes a shift register circuit, and the shift register circuit includes n(n?2) pieces of basic circuits which are connected vertically in multiple stages.
    Type: Application
    Filed: February 5, 2007
    Publication date: August 23, 2007
    Inventors: Takayuki Nakao, Hideo Sato, Masahiro Maki, Toshio Miyazawa
  • Publication number: 20070188672
    Abstract: A shift register circuit having a level conversion function is provided with a simple circuit configuration.
    Type: Application
    Filed: February 7, 2007
    Publication date: August 16, 2007
    Inventors: Hideo Sato, Shigeyuki Nishitani, Takayuki Nakao, Masahiro Maki
  • Publication number: 20070115245
    Abstract: The present invention provides a display device that has a driving circuit including a single channel bidirectional shift register with which the circuit scale can be reduced without increasing the number of elements. The driving circuit includes a single channel bidirectional shift register. This single channel bidirectional shift register has an RS flip-flop circuit. The RS flip-flop circuit includes a first transistor having a first electrode connected to an output terminal and having a second electrode to which a second scanning direction control signal is applied and a second transistor having a first electrode connected to an output terminal and having a second electrode to which a first scanning direction control signal is applied.
    Type: Application
    Filed: November 17, 2006
    Publication date: May 24, 2007
    Inventors: Takayuki Nakao, Masahiro Maki, Hideo Sato, Toshio Miyazawa
  • Publication number: 20070080922
    Abstract: The present invention relates to a display device, and more particularly to a display device which includes a drive circuit having a CMOS shift register which is constituted of a CMOS circuit.
    Type: Application
    Filed: September 19, 2006
    Publication date: April 12, 2007
    Inventors: Takayuki Nakao, Hideo Sato, Masahiro Maki
  • Publication number: 20070070056
    Abstract: A display device which incorporates a touch panel function therein can reduce the number of elements which constitute a photo sensor circuit and can accurately detect an input coordinate position without requiring a particular coordinate arithmetic circuit. In a display device which includes: a display part on which a plurality of pixels are arranged in a matrix array; and a plurality of photo detection circuits which are arranged in a matrix array in the inside of the display part, each photo detection circuit of the plurality of photo detection circuits includes: a photo sensor which converts an incident light into a optical current corresponding to intensity of the incident light; an integral capacitance which integrates the optical current converted by the photo sensor; and a comparator to which a voltage of the integral capacitance is inputted; and the comparator includes a transistor of an open drain output type with a grounded source.
    Type: Application
    Filed: September 26, 2006
    Publication date: March 29, 2007
    Inventors: Hideo Sato, Shigeyuki Nishitani, Takayuki Nakao, Naruhiko Kasai, Hajime Akimoto
  • Publication number: 20070070283
    Abstract: The present invention provides an active matrix display device capable of raising its integration density by reducing the drive circuit area on the active matrix substrate. A semiconductor film presents in the boundary between a quasi-strip crystalline semiconductor film and another semiconductor film is used to form conductive lines, resistors, source/drain electrodes and the like which are respectively connected to thin film transistors formed using the quasi-strip crystalline semiconductor film.
    Type: Application
    Filed: September 25, 2006
    Publication date: March 29, 2007
    Inventors: Masahiro Maki, Hideo Sato, Takayuki Nakao, Toshihiko Itoga