| 摘要 |
PURPOSE:To turn on and off voltage and to change a reflection factor easily by arranging a transparent substrate having a transparent electrode and a light reflecting substrate having a light reflecting electrode so that respective electrodes are opposed at a fixed interval and sealing a coresteric liquid crystal component containing dichromatic dye into the gap. CONSTITUTION:When voltage V is not applied to the transparent electrode 2 and the light reflecting electrode 3 by a switch S, incident light is absorbed by the coresteric liquid crystal component 7, so that reflected light from the electrode 3 is reduced and the practical reflection factor as a mirror is made low. If the switch S is turned on and the voltage is applied to the electrodes 2, 3 under said state, the liquid crystal molecules and the dichromatic dye are arrayed approximately vertically to the electrodes 2, 3 because a positive dielectric anisotropy material is used as the component 7. Consequently, the light absorption of the dichromatic dye is reduced and reflected light from the electrode 3 is increased, so that the practical reflection factor as a mirror is improved. |
