Patents by Inventor Naoko Sawatari

Naoko Sawatari 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: 7402332
    Abstract: A main object of the present invention is to provide a liquid crystal display using a ferroelectric liquid crystal, showing the mono-stability operation mode using a material showing the chiral smectic C phase via the smectic A phase in the temperature lowering process as the ferroelectric liquid crystal. The present invention achieves the object by providing a reactive liquid crystal layer having a reactive liquid crystal fixed on at least one facing surface of the two alignment films in a liquid crystal display comprising two aligned substrates comprising a substrate, an electrode layer and an alignment film, disposed so as to have the alignment films face with each other, and a ferroelectric liquid crystal sandwiched between the aligned substrates.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: July 22, 2008
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Naoko Sawatari, Masato Okabe
  • Publication number: 20080124493
    Abstract: A liquid crystal display which can give mono-domain alignment of the ferroelectric liquid crystal without forming alignment defects. The liquid crystal display has a UV curable liquid crystal side substrate having a first substrate, an electrode layer formed on the first substrate, a first alignment layer formed on the electrode layer, and a UV curable liquid crystal layer with a UV curable liquid crystal fixed and formed on the first alignment layer; and a counter substrate having a second substrate, an electrode layer formed on the second substrate, and a second alignment layer formed on the electrode layer. The UV curable liquid crystal layer of the UV curable liquid crystal side substrate and the second alignment layer of the counter substrate are disposed so as to face each other such that a ferroelectric liquid crystal is sandwiched between the UV curable liquid crystal side substrate and the counter substrate.
    Type: Application
    Filed: February 9, 2005
    Publication date: May 29, 2008
    Inventors: Naoko Sawatari, Masato Okabe
  • Publication number: 20070154653
    Abstract: A liquid crystal display using a ferroelectric liquid crystal, which can give mono-domain alignment of the ferroelectric liquid crystal without forming alignment defects such as zigzag defects, hairpin defects and double domains and which is so remarkably good in alignment stability that the alignment thereof can be maintained even if the temperature of the liquid crystal is raised to the phase transition point or higher. The liquid crystal display has a ferroelectric liquid crystal sandwiched between two substrates, wherein an electrode and a photo alignment layer are each successively formed on opposite faces of the two substrates facing each other, and a constituent material of the respective photo alignment layer has a different composition with the ferroelectric liquid crystal sandwiched therebetween.
    Type: Application
    Filed: January 19, 2005
    Publication date: July 5, 2007
    Inventors: Naoko Sawatari, Masato Okabe, Hideo Hama
  • Publication number: 20070154652
    Abstract: A main object of the invention is to provide a liquid crystal display using a ferroelectric liquid crystal, which can give mono-domain alignment of the ferroelectric liquid crystal without forming alignment defects such as zigzag defects, hairpin defects and double domains and which is so remarkably good in alignment stability that the alignment thereof can be maintained even if the temperature of the liquid crystal is raised to the phase transition point or higher.
    Type: Application
    Filed: January 19, 2005
    Publication date: July 5, 2007
    Inventors: Naoko Sawatari, Masato Okabe, Hideo Gana
  • Publication number: 20060083865
    Abstract: The main object of the present invention is to control the alignment of the ferroelectric liquid crystal by a simple method without the need of an alignment process such as the rubbing process and the photo alignment process in a liquid crystal display using a ferroelectric liquid crystal; to solve better the light scattering generated at the interface between the polarizing plate and the other functional layers compared with the case of separately providing the polarizing plate by the use of an alignment layer having the alignment function of controlling the alignment of the ferroelectric liquid crystal and the polarizing function of changing a non polarized light beam to a linear polarized light beam and thereby restrain the deterioration of the light transmittance, to achieve a thin shape and a light weight of the liquid crystal display.
    Type: Application
    Filed: June 9, 2005
    Publication date: April 20, 2006
    Inventors: Masato Okabe, Naoko Sawatari, Makoto Ishikawa
  • Publication number: 20060082719
    Abstract: The main object of the present invention is to provide a liquid crystal display using a ferroelectric liquid crystal that controls the alignment of the ferroelectric liquid crystal by a simple method without the need of an alignment process such as the rubbing process and the photo alignment process. The present invention achieves the object by providing a liquid crystal display comprising two alignment substrates each comprising in this order a substrate, an electrode layer and alignment layer, with a ferroelectric liquid crystal interposed therebetween, wherein at least one of the two alignment layers is a columnar alignment layer having a column structure with plate-like molecules laminated with the normal directions of the plate-like molecules aligned in a certain direction of the substrate.
    Type: Application
    Filed: June 9, 2005
    Publication date: April 20, 2006
    Inventors: Masato Okabe, Naoko Sawatari, Makoto Ishikawa
  • Publication number: 20060083868
    Abstract: A main object of the present invention is to provide a liquid crystal display using a ferroelectric liquid crystal, showing the mono-stability operation mode using a material showing the chiral smectic C phase via the smectic A phase in the temperature lowering process as the ferroelectric liquid crystal. The present invention achieves the object by providing a UV curable liquid crystal layer having a UV curable liquid crystal fixed on at least one facing surface of the two alignment films in a liquid crystal display comprising two aligned substrates comprising a substrate, an electrode layer and an alignment film, disposed so as to have the alignment films face with each other, and a ferroelectric liquid crystal sandwiched between the aligned substrates.
    Type: Application
    Filed: February 10, 2005
    Publication date: April 20, 2006
    Inventors: Naoko Sawatari, Masato Okabe
  • Publication number: 20060038949
    Abstract: The main object of the present invention is to restrain the decline of the light transmission by solving the light scattering generated at the interface between the polarizing plate and the liquid crystal display by providing the alignment function of controlling the alignment of the ferroelectric liquid crystal and the polarizing function of changing the non polarized light beam to the linear polarized light beam to one of the alignment layers, and furthermore, to achieve the thin shape and the light weight of the liquid crystal display, and achieve the cutback of the production cost.
    Type: Application
    Filed: June 9, 2005
    Publication date: February 23, 2006
    Inventors: Masato Okabe, Naoko Sawatari, Makoto Ishikawa
  • Publication number: 20050266177
    Abstract: A main object of the present invention is to provide a liquid crystal display using a ferroelectric liquid crystal, showing the mono-stability operation mode using a material showing the chiral smectic C phase via the smectic A phase in the temperature cooling process as the ferroelectric liquid crystal.
    Type: Application
    Filed: February 10, 2005
    Publication date: December 1, 2005
    Inventors: Naoko Sawatari, Masato Okabe
  • Publication number: 20050233094
    Abstract: A main object of the invention is to provide liquid crystal displays using a ferroelectric liquid crystal, which can give mono-domain alignment of the ferroelectric liquid crystal without forming orientation defects such as zigzag defects, hairpin defects and double domains and which is so remarkably good in orientation stability that the orientation thereof can be maintained even if the temperature of the liquid crystal is raised to the phase transition point or higher.
    Type: Application
    Filed: January 19, 2005
    Publication date: October 20, 2005
    Inventors: Naoko Sawatari, Masato Okabe, Hideo Hama