| 摘要 |
PROBLEM TO BE SOLVED: To provide a reflection type liquid crystal display element with which bright and multicolor display is possible and achromatic colors are obtainable. SOLUTION: A liquid crystal cell 2 and a double refractive layer 3 having a uniaxial double refractive layer are installed between a polarizing plate and a reflection plate 4. A liquid crystal layer 5 is liquid crystals of positive dielectric anisotropy twisted in the orientation of liquid crystal molecules at an angle of approximately 45 to 135 deg. in a thickness direction by the impressing state of voltage. The orientation direction of the polarizing plate 1 with an upper substrate 4a has the orientation direction (5L) which is parallel (5L) with the transmission axis 1T of the polarizing plate 1 and approximately equal to the lagging axis 3s of the double refractive layer 3 with respect to the lower substrate 4b of the double refractive layer 3. The polarized light transmitted through the polarizing plate 1 is reflected by the reflection plate 7 and returns as it is as the achromatic color in the case shown in Fig. where the voltage is not impressed on the liquid crystal cell 2. The polarized light is converted to elliptically polarized light by the double refractive layer 3 and the reflected light reflected by the reflection plate 7 is emitted as the colored light having the color tone by the retardation of the double refractive layer 3 when the voltage is impressed. |
