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:
May. 12, 2009
Filed:
Feb. 05, 2007
Keiji Iimura, Tokyo, JP;
Keiji Iimura, Tokyo, JP;
Other;
Abstract
The disclosed is a light guide unit and a surface illuminator illuminating a liquid crystal display (LCD). The light guide unit () is composed of a surface lighting light guide () having a light emitting major surface () and a light receiving side surface (); a channel light guide () having optical cores () to form a fiber optic channel array having light entrance core surfaces () and light exit core surfaces (); and a distribution light guide () having a light distribution guide surface () and a light receiving portion () receiving light from the LED (). The light guides (and) are positioned respectively in that order to form a light guide unit (). Each width (w) and/or a pitch (p) of the optical cores () may change in accordance with a distance from the light receiving portion (). The channel light guide ()/the distribution light guide () may have a linear shape or a nonlinear shape with 'L', 'U' or “O” shape. The distribution light guide () may have a “V” shaped or rectangular reflector () with opposed surfaces () to reflect light (L) from the LED () to face the reflector ().