Patent ID: 7532285
Filing Date: 2009-05-12
Classification: G02F

Abstract:
1. A liquid crystal display (LCD) device comprising a liquid crystal (LC) layer, first and second substrates sandwiching therebetween said liquid crystal layer, and an optical compensation film disposed adjacent to said second substrate, wherein: said first substrate mounts thereon electrodes for applying to said LC layer an electric field parallel to said first substrate; said LC layer has a twisted angle of substantially zero degree, and includes LC molecules which have longer optical axes extending parallel to said first substrate; said LC layer has a positive pre-tilt angle θ p said optical compensation film has three optical elastic axes including a fast axis extending along a Y-axis, a slow axis extending along a direction which is rotated from an X-axis by a positive rotational angle θ s, and another axis extending along a thickness direction of said optical compensation film which is rotated from a Z-axis by said positive rotational angle θ s; and said X-axis has a positive direction which substantially coincides with a projection of a rising direction of said longer optical axes of said LC molecules rising from said substrate surfaces upon display of a black color, said projection being projected on one of said substrate surfaces, said Y-axis has a positive direction which substantially coincides with a direction rotated from said X-axis by an angle of 90 degrees in a counter-clockwise direction as viewed from a front side of said LCD device, said Z-axis has a positive direction which substantially coincides with a direction as viewed normal to said substrate surfaces from said first substrate toward said second substrate, and said positive rotational direction coincides with a counter-clockwise direction as viewed from a negative side of said Y-axis toward a positive side of said Y-axis.