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:
Mar. 31, 2009
Filed:
Jul. 26, 2006
Jun Won Chang, Daejeon, KR;
Byoung Kun Jeon, Daejeon, KR;
Soo Jin Jang, Seoul, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
An IPS-LCD, in which the direction of an optical axis and retardation values are adjusted according to the disposition of a phase retardation film replacing one protective film, obtains a contrast ratio similar to that of an IPS-LCD having upper and lower protective films, and has a small thickness. The IPS-LCD includes first and second polarizing plates (), an IPS panel (), and a first protective film. Absorption axes () of the first and second polarizing plates () are orthogonal to each other, and an optical axis of a liquid crystal in the IPS panel () and the absorption axis () are parallel with each other. A second phase retardation film, obtained by coating a biaxial film () with a uniaxial C film (), is disposed between the second polarizing plate () and the IPS panel () and is used as a second protective film.