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:
Oct. 30, 2012
Filed:
Nov. 21, 2008
Yusuke Nishihara, Osaka, JP;
Iori Aoyama, Osaka, JP;
Tokio Taguchi, Osaka, JP;
Akihiro Yamamoto, Osaka, JP;
Masumi Kubo, Osaka, JP;
Yusuke Nishihara, Osaka, JP;
Iori Aoyama, Osaka, JP;
Tokio Taguchi, Osaka, JP;
Akihiro Yamamoto, Osaka, JP;
Masumi Kubo, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A liquid crystal display device of the present invention includes: a liquid crystal display panel; and first and second light diffusing layers, each of which has a first major surface and a second major surface and each of which is arranged such that the first major surface opposes a viewer side surface of the liquid crystal display panel. Each of the first and second light diffusing layers includes a first region formed of a first substance which has a first refractive index Nand a plurality of second regions formed of a second substance which has a second refractive index N(<N). The plurality of second regions are arranged in the first region at a predetermined pitch P in one direction in a plane parallel to the second major surface. Each of the plurality of second regions forms a plurality of interfaces with the first region, the interfaces being inclined by α° from the normal of the second major surface. The first light diffusing layer is closer to the liquid crystal display panel than the second light diffusing layer is. The plurality of second regions of the first light diffusing layer are arranged in a stripe pattern along a horizontal direction of the liquid crystal display panel. According to the present invention, the light diffusing layers that utilize total reflection are used to improve the viewing angle characteristics of a direct-viewing type liquid crystal display device.