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:
Jun. 09, 1998
Filed:
May. 20, 1996
Tomohiro Yokota, Aichi-ken, JP;
Fumio Nishitani, Chita, JP;
Hiroshi Ogawara, Otsu, JP;
Akihito Kubo, Tsukuba, JP;
Makoto Fujigami, Tsukuba, JP;
Sekisui Chemical Co., Ltd., Osaka, JP;
Abstract
A light adjusting sheet for a planar lighting device includes a plurality of convex and concave ridges or regions arranged alternately and approximately parallel to each other on one surface. Each of the convex regions and concave regions are formed by two flat surfaces. The ridges may have a cross section of a sine curve. Another light adjusting sheet consists of a plurality of single sheets each having the above configuration, stacked together. A planar lighting device includes the light adjusting sheet of the above configuration, wherein peak lines of the convex ridges and bottom lines of the concave ridges are arranged to make a predetermined angle with an axis of a linear light source. The liquid crystal display includes a liquid crystal display element placed on front of the planar lighting device of the above configuration.