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. 09, 2019
Filed:
Mar. 15, 2018
Keiwa Inc., Tokyo, JP;
Takahiro Tsuji, Tokyo, JP;
Keiwa Inc., Tokyo, JP;
Abstract
A liquid crystal display device includes a liquid crystal panel, a light-guiding plate disposed on a back face of the liquid crystal panel, at least one LED light source along an end face of the light-guiding plate, and a turning film between the liquid crystal panel and the light-guiding plate. The turning film includes a substrate layer and a prism array on a back face of the substrate layer. A retardation value of the substrate layer is no less than 0 nm and no greater than 100 nm. In a planar view: a transmission axis of a back face side-polarizing plate of the liquid crystal panel is perpendicular to the end face of the light-guiding plate; ridge lines in the prism array are parallel to the end face of the light-guiding plate; and the transmission axis of the back face side-polarizing plate is perpendicular to the ridge lines.