The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 01, 2001
Filed:
Sep. 30, 1998
Shinji Shimada, Kashihara, JP;
Hiroshi Yoshikawa, Onoda, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
It is an object of the invention to provide a liquid crystal display apparatus produced by combining a negative dielectric constant anisotropy and a perpendicular orientation film, the apparatus capable of preventing lowering of contrast because of a phase difference due to a tilt of liquid crystal molecules at the time of non-select voltage application and ensuring both high luminance and high contrast. The liquid crystal display apparatus produced by combining the negative dielectric constant anisotropy and the perpendicular orientation film is used in the normally black mode, and a phase difference plate for compensating the phase difference caused by the tilt of the liquid crystal molecules at the time of non-select voltage application is provided so as to be adjacent to a liquid crystal cell, with the result that light-transmittance at the time of non-select voltage application can be kept in a low value and contrast can be largely improved.