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. 26, 2009
Filed:
Apr. 12, 2005
Applicants:
Kenji Fujita, Mie, JP;
Takayuki Natsume, Tenri, JP;
Inventors:
Kenji Fujita, Mie, JP;
Takayuki Natsume, Tenri, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F 1/1335 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a circularly polarizing plate comprising a polarizer and an optical layer having a value 5 of Nshown by the following equation (1), wherein the circularly polarizing plate comprises a birefringent body satisfying N<0 between the polarizer and a retarder satisfying N>0. N=(n−n)/(n−n)(1), where nand ndesignates main refractive indexes in a plane to light having a wavelength of 550 nm and satisfy n≧n, and ndesignates a main refractive index in a thickness direction to the light having the wavelength of 550 nm.