Liquid crystal display device

Abstract

Abstract PURPOSE:To hold display contrast high even in a vision range close to a normal direction by interposing a transparent plate type optical system which has light refraction effect between a twisted nematic liquid crystal layer and an observer. CONSTITUTION:The liquid crystal display device consists of substrates 11 and 12, a transparent electrode (matrix electrode) 13, an oriented layer 14, twisted nematic liquid crystal 15, a sealing material 20, a polarizing plate 16, a Fresnel prism 7, and a diffuse reflecting plate 18. The transparent plate type optical system 17 which has light refraction effect lighe a Fresnel lens is interposed between the observer 4 and liquid crystal display plate, so light traveling toward the observer 4 from a liquid-crystal molecule with a tilt angle thetat is refracted by the Fresnel lens having an oblique surface thetaa in the normal direction. Therefore, the display contrast is held high in the vision range close to the normal direction.

Inventors

• 👤 Fumiaki Funada
• 👤 船田　文明
• 👤 Kenichi Nakagawa
• 👤 謙一 中川
• 👤 Yutaka Ishii
• 👤 裕 石井

Bibliographic Details