Patent ID: 6980271
Filing Date: 2005-12-27
Classification: G02F

Abstract:
1. A semi-transmissive type LCD device comprising: a reflector plate with an irregularity pattern and optical penetration areas; a back light having an optical guide plate in which prism grooves are arranged in parallel to each other in an arrangement direction; the irregularity pattern being formed by a combination of blocks arranged in an array; each of the blocks including a basic irregularity pattern for one pixel or one element thereof, and (N−1) modified basic irregularity pattern or patterns each formed by modifying the basic irregularity pattern, where N is a positive integer (N≧2); the basic irregularity pattern and the (N−1) modified basic irregularity pattern or patterns in each of the blocks being arranged in a direction perpendicular to the arrangement direction; the basic irregularity pattern being continuous at either end thereof in a same direction as the arrangement direction and having an optical penetration area; the basic irregularity pattern being divided in a same direction as the arrangement direction, thereby forming N sub-patterns; and each of the (N−1) modified basic irregularity pattern or patterns being formed by the N sub-patterns circularly shifted one by one.