Patent ID: 8941786
Filing Date: 2015-01-27
Classification: G02B,G02F,H04N

Abstract:
1. An electrically-driven liquid crystal lens comprising: a first substrate and a second substrate arranged opposite each other and each including a plurality of lens regions; a plurality of first electrodes formed on the first substrate in each lens region and spaced apart from one another in a given direction; a second electrode formed over the entire surface of the second substrate, wherein voltages gradually increasing from a center to an edge of each lens region are applied to the respective first electrodes and a ground voltage is applied to the second electrode when in a voltage applying state; a first alignment film formed over the entire surface of the first substrate including the first electrodes, the first alignment film being subjected to rubbing by an angle of 90 degree with respect to a longitudinal direction of the first electrodes and being aligned to have a pretilt angle in a range of 4-45 degrees; and a liquid crystal layer filled between the first substrate and the second substrate, wherein in the voltage applying state, liquid crystals of the liquid crystal layer are aligned in a direction substantially perpendicular to a potential surface, and an effect of the pretilt angle is greater than an effect of a horizontal electric field between the first electrodes.