Patent attributes
A liquid crystal display device of the present invention is composed of a λ/4 plate 1, a λ/2 plate 2, and a polarizing plate 3 which are provided in this order from the side of a liquid crystal layer 10. Here, an angle formed between an absorption axis of the polarizing plate 3 and an absorption axis of the λ/2 plate 2 is about 45°, an in-plane retardation of the λ/2 plate 2 is set to a value obtained by adding λ/4 to an in-plane retardation of a retardation plate 1, desirably, the λ/4 plate 1, and an optical axis of the λ/4 plate 1 and an optical axis of the λ/2 plate 2 are orthogonal to each other. In this configuration, the optical axis of the λ/4 plate 1 is placed at 150°, the optical axis of the λ/2 plate 2 is placed at 60°, and the absorption axis of the polarizing plate 3 is placed at 15°. This configuration improves display characteristics, that is, performs bright display at a higher contrast ratio and in a wider viewing angle with less dependence on visual field, thereby realizing an excellent reflection-type liquid crystal display device that is very easy to view even in a relatively dim place such as an indoor environment.
