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:
Jul. 05, 2005
Filed:
Jul. 31, 2003
Fumihiko Fujishiro, Kanagawa, JP;
Fumihiko Fujishiro, Kanagawa, JP;
NEC LCD Technologies, Ltd., Kawasaki, JP;
Abstract
A reflective or semi-transmissive type LCD device reduces a moire generated by the irregularity pattern of the reflector plate of the LCD panel. A front light has an optical guide plate in which prism grooves are arranged in an arrangement direction. The pattern of the reflector plate is formed by blocks, each of which includes a basic irregularity pattern for one pixel or its element, and (N−1) modified basic irregularity pattern or patterns each formed by modifying the basic irregularity pattern. All the basic irregularity patterns in each block are arranged in a direction perpendicular to the arrangement direction. The basic irregularity pattern is continuous at either end thereof in the arrangement direction. The basic irregularity pattern is divided in the arrangement direction into N sub-patterns. Each of the (N−1) modified basic irregularity patterns is formed by the N sub-patterns circularly shifted one by one.