METHOD FOR DRIVING LIQUID CRYSTAL RETARDER

摘要

PROBLEM TO BE SOLVED: To provide a method for driving a liquid crystal retarder which can carry out simple proportional controlling on voltage. SOLUTION: In the method for driving a liquid crystal retarder to electrically change the polarizing state of light by using the birefringence of a substance having optical anisotropy, linear control between the reciprocal of the voltage V applied on the liquid crystal retarder and the phase difference R of the liquid crystal retarder can be performed in the voltage region where the voltage V is higher than the threshold voltage Vth.