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:
Jun. 30, 1998
Filed:
Dec. 10, 1996
Hajime Nakamura, Kanagawa-ken, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
The present invention is directed to the prevention of reversal and deterioration of a screen at right and left viewing angles and upper and lower viewing angles in an OCB-mode liquid-crystal display. It is possible to prevent deterioration of a screen by obtaining the optimum value of �absolute value {R(V.sub.1)} of retardation before correction by phase compensation film!/wavelength (.lambda.) at a lower-side driving voltage for each color of R, G, and B and thereby, preventing an optical rotation of liquid crystal on B wavelength. Specifically, B wavelength is set to R(V.sub.1)/.lambda..ltoreq.0.85. By adjusting a cell gap of each color, display characteristics of a screen at right and left viewing angles are improved.