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:
Nov. 06, 2001
Filed:
Dec. 05, 1997
Hideaki Nagakubo, Fukushima-ken, JP;
Mitsuaki Yamazaki, Fukushima-ken, JP;
Satoshi Matsubara, Fukushima-ken, JP;
Ryohei Kakuta, Fukushima-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
In a liquid crystal display device, a light quantity control portion b 4,is formed to a dot shape by print or the like on a diffusion plate,interposed between lens sheets,and a light transmission member,on the side thereof near to a backlight source,composed of a cold cathode fluorescent lamp or the like. Since the dots of the light quantity control portion,have a light transmitting property to a certain extent, they reflect a part of the light from the backlight source,and permit the remaining light to pass therethrough. With this arrangement, there can be provided the liquid crystal display device capable of brightly and uniformly irradiating the entire surface of the effective display area of a liquid crystal panel from the backside thereof without emission lines.