| 摘要 |
PURPOSE:To obtain the element which has a good memory effect by a bistable uniform orientation and is less degraded in contrast by an orientation defect by subjecting at least one of substrates to an orientation treatment and impressing an electric field to a ferroelectric liquid crystal to regulate the orientation state thereof after the sealing thereof. CONSTITUTION:At least one substrate 1 or 2 is subjected to the orientation treatment and the orientation state of the ferroelectric liquid crystal is regulated by impressing the electric field after the sealing thereof. Namely, the ferroelectric liquid crystal compsn. of Table 2 is sealed under heating between the substrates 1 and 2 and is gradually cooled down to a room temp. and the alternating waveforms of a measuring voltage are impressed for a prescribed period of time between electrodes 4 and 5 of this element, by which the orientation state of the liquid crystal is made into the uniform state having the dense striped structure in the direction nearly perpendicular to the layer direction. The zigzag defects formed at the time of the sealing and cooling are removed by this electric field treatment. The liquid crystal electrooptical element which is provided with a good memory effect by a bistable uniform orientation and is less degraded in contrast by the orientation defect is obtd. in this way. |
