FERROELECTRIC LIQUID CRYSTAL ELEMENT

摘要

PURPOSE:To realize a uniform orientation state and to make a contrast high and display characteristic excellent by setting the directions of rubbing treatments parallel with each other between a pair of upper and lower substrates so as to twist within the specific angle from the same direction. CONSTITUTION:This ferroelectric liquid crystal element is constituted by clamping ferroelectric liquid crystals which exhibit two stable states in an oriented state and increase the apparent tilt angle by impressing AC electric fields thereto between upper and lower substrates having electrodes and orientation control films subjected to a rubbing treatment. The directions of the rubbing treatments are so set as to be parallel with each other between the upper and lower substrates and to twist at <=15 pts.wt. from the same direction. Namely, the rubbing direction of the lower substrate is preferably twisted clockwise with the rubbing direction of the upper substrate, when viewed from the upper substrate side if the spontaneous polarization PS of the ferroelectric liquid crystals is negative. The rubbing direction of the lower substrate is preferably twisted counterclockwise with the rubbing direction of the upper substrate when the spontaneous polarization PS is positive.