Patents by Inventor Noriaki Doi

Noriaki Doi 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).

  • Retardation compensating plate to compensate residual retardation of a liquid crystal panel, a compensator, a liquid crystal display device, and a projection image display apparatus having the same
    Patent number: 8018557
    Abstract: A retardation compensator 40 for compensating for residual retardation of a liquid crystal panel 11 includes a retardation compensating plate 50 having birefringence. An in-plane retardation R0c of the retardation compensating plate 50 and an in-plane retardation R0p of the liquid crystal panel 11 satisfy a relationship of 1<R0c/R0p?10, thereby allowing changes in the amount of compensated retardation among rotation angles occurring when the retardation compensating plate 50 is set with respect to the liquid crystal panel 11 to be confined within narrow limits. Therefore, the contrast can be adjusted readily, and variations in residual retardation among the individual liquid crystal panels 11 can be accommodated flexibly.
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: September 13, 2011
    Assignee: Sony Corporation
    Inventors: Yutaka Muramoto, Satoshi Sekino, Hideki Terashima, Tatsuya Harima, Sachie Shoji, Noriaki Doi, Tokuhiro Morioka
  • Retardation compensating plate, retardation compensator, liquid crystal display device, and projection image display apparatus
    Publication number: 20060215091
    Abstract: A retardation compensator 40 for compensating for residual retardation of a liquid crystal panel 11 includes a retardation compensating plate 50 having birefringence. An in-plane retardation R0c of the retardation compensating plate 50 and an in-plane retardation R0p of the liquid crystal panel 11 satisfy a relationship of 1<R0c/R0p?10, thereby allowing changes in the amount of compensated retardation among rotation angles occurring when the retardation compensating plate 50 is set with respect to the liquid crystal panel 11 to be confined within narrow limits. Therefore, the contrast can be adjusted readily, and variations in residual retardation among the individual liquid crystal panels 11 can be accommodated flexibly.
    Type: Application
    Filed: March 15, 2006
    Publication date: September 28, 2006
    Applicant: Sony Corporation
    Inventors: Yutaka Muramoto, Satoshi Sekino, Hideki Terashima, Tatsuya Harima, Sachie Shoji, Noriaki Doi, Tokuhiro Morioka