Liquid crystal cell

摘要

A liquid crystal cell having spaced apart opposed and first and second substrates. First and second orientation films having first and second rubbing directions are on opposing surfaces of the first and the second substrates. First and second polarizers having first and second transmittance axis directions are on exterior surfaces of the first and the second substrates. A liquid crystal having a twisted angle "ø" is interposed in a gap "d" between the first and the second orientation films. The first transmittance axis direction is perpendicular to the second transmittance axis direction. The first and the second rubbing direction form an angle of ø. The first and second rubbing directions form angles of (90°-ø/2 with the first and second transmittance axis directions. The gap "d" is equal to the distance that produces optimum transmittance of the liquid crystal cell. The optimum transmittance is found in accord with a Jones matrix and a parameter space approach, with the angle (90-ø)/2 being a factor.