PURPOSE: To reduce the size of a device and to enable effective shielding of light by providing a pair of electrodes in the position facing the support of a light transmittable material having a space for filling and housing a liquid crystal.

CONSTITUTION: A support 1 has parallel plates 3, 4 and a blocking plate 5 for regulating the space for filling and hermetically housing a liquid crystal 2. A pair of electrodes 6, 7 are provided to the plates 3, 4 and the liquid crystal 2 is activated to a light shieldable state when a voltage is impressed thereon. The light in the direction 8 is thus blocked and the device is usable as a blind, etc. The adjustment of the quantity of the transmitted light is accomplished by filling the liquid crystals 2aW2d into the discrete spaces for hermetic housing of plural layers consisting of plate bodies 3a, 4a, 9, 10, 11 and impressing a voltage to the electrodes 6a, 7a, 6b, 7b, 6c, 7c, 6d, 7d for the respective electrodes, thereby activating selectively the liquid crystals 2aW2d and making the same semi-light transmittable.