| 摘要 |
PURPOSE:To obtain a broad visual field by providing concave lens-shaped transparent layers on the display side of picture elements. CONSTITUTION:The transparent layers 4 having the concave lens-shaped structure are provided on each of the respective picture elements on the display side of the picture elements. the optical paths expressed by arrows of solid lines and broken lines in fig. are the same in the stage of passing a liquid crystal layer 1 and the incident angle entering the transparent electrode layer 2 from the liquid crystal layer 1 is theta. The angle at which the display contrast of the liquid crystal display device attains 10 is selected at this time. The rays having the incident angle smaller than thetahave the contrast larger than 10 and the display image quality is good but the rays having the incident angle larger than theta have the contrast smaller than 10 and the display image quality is inferior. Namely, this incident angle theta corresponds to the visual field angle of the device. The rays entering the high-refractive index layer 4 of glass are refracted in the form such as the rays being parallel till then spread to the outer side in the state of emerging to the low-refractive index layer 5 from the boundary face of the concave lens shape. The rays are also refracted in the state of emerging to the outside of a polarizing plate 6. The visual field angle of the liquid crystal display device is widened in this way. |
