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:
Jul. 06, 2010
Filed:
Sep. 27, 2007
Shigeki Oka, Tokyo, JP;
Noriki Tachibana, Tokyo, JP;
Shigeki Oka, Tokyo, JP;
Noriki Tachibana, Tokyo, JP;
Konica Minolta Opto, Inc., Tokyo, JP;
Abstract
An IPS (In Plane Switching) mode type liquid crystal display apparatus having polarizing plates on both sides of a liquid crystal cell, wherein the polarizing plate protective film used between a liquid crystal cell and polarizer on a backlight light-source side is a cellulose ester film having a thickness of 20-50 μm and a retardation value of 0 nm≦Ro≦2 nm and −5 nm≦Rt≦5 nm, and this cellulose ester film is characterized by temperature variation ΔRt(t) lying in the range 0 nm≦ΔRt(t)≦7 nm and humidity variation ΔRt(h) lying in the range 0 nm≦ΔRt(h)≦20 nm.