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:
Mar. 24, 1998
Yasunobu Tagusa, Ikoma, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A liquid crystal display (LCD) device is composed of (1) an LCD element having (i) a glass substrate on which a flat portion including pixel electrodes and a flat portion including switching elements, wires, and the like are laminated with interlayer insulating films therebetween, each interlayer insulating film being an organic film with an optical transmittance of not less than 95 percent with respect to light with a peak wavelength and (ii) a liquid crystal layer made of liquid crystal whose refractive index anisotropy &Dgr;n(450) with respect to light with a wavelength of 450 nm and whose refractive index anisotropy &Dgr;n(650) with respect to light with a wavelength of 650 nm satisfy a condition that a difference &Dgr;n(450)−&Dgr;n(650) between them is set so as to be in a range of 0 to 0.01, and (2) a phase difference plate whose refractive index anisotropy is negative (na=nc>nb) and whose index ellipsoids are inclined substantially throughout the phase difference plate. By thus arranging the LCD device, phase differences depending on viewing angles which tend to occur to the LCD element are eliminated whereby the viewing angle dependence of the LCD device is suppressed, while the structure of the pixel substrate is improved, and as a result, reversal influences to a display screen are avoided.