| 摘要 |
PURPOSE:To simplify structure and to improve the coloring and the visual field angular characteristic of display by arranging a phase plate having a specified phase advancing axis between a pair of polarizing plates. CONSTITUTION:This device is provided with liquid crystal material 19 having the value of 800-900nm as the product DELTAnd of refractive index anisotropy DELTAn and layer thickness (d), and a pair of polarizing plates 20 and 21 which is arranged on the outside of a pair of substrates 14 and 17 so as to hold the pair of substrates 14 and 17 between them and arranged so that the transmission axis of either polarizing plate 20 may cross with the orientation processing direction of either substrate 14 at about 140 deg. and their transmission axes may cross with each other at about 85 deg.. A pair of phase plates 22 and 23 which is arranged between the polarizing plates 20 and 21 so that the phase advancing axis of either phase plate may cross with the orientation processing direction of the other substrate 17 at about 40 deg. and their phase advancing axes may cross with each other at about 35 deg., and another phase plate 26 which is arranged between the polarizing plate 21 and the other substrate arranged on a side where light is projected so that the transmission axis of the adjacent polarizing plate 20 and the phase advancing axis may be nearly parallel and whose value of DELTAnd is set to 300-400nm are provided. |
