| 摘要 |
PURPOSE: To obtain a vivid projection picture on a screen by forming minute grooves like annular zones in one surface of a liquid crystal display element and forming a reflection surface in this surface where these grooves are formed. CONSTITUTION: Minute groves 14 like annular zones are formed in one surface of a liquid crystal display element 9, and a reflection surface 16 is formed in this surface where these grooves 14 are formed. Consequently, a Fresnel lens effect is displayed by minute grooves 14 like annular zones. Since it is unnecessary to use a Fresnel reflection plate, the distance from a liquid crystal layer 10 to the reflection face 16 can be shortened. Thus, picture deviation and picture blur are eliminated to obtain a lighter and vivid projection picture on the screen. |
