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:
Apr. 10, 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 a light diffusing layer which has first and second major surfaces and which is arranged such that the first major surface opposes a viewer side surface of the liquid crystal display panel. The light diffusing layer 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 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 second regions forms interfaces with the first region, the interfaces being inclined by α° from a normal of the second major surface. θwhich is expressed by θ=tan(a/Lb) is not more than 1.7 arc minutes where Lb is a typical viewing distance, and a is expressed by a=tan θ'×Lt, in which θ′ is an angle of incidence that is obtained from α, N, and N, and Lt is a distance from the second major surface to a liquid crystal layer side surface of a viewer side substrate of the liquid crystal display panel. According to the present invention, the viewing angle characteristics of a direct-viewing type liquid crystal display device can be improved by using a light diffusing layer that utilizes total reflection.