Liquid crystal driving apparatus and liquid crystal driving method

A liquid crystal driving method for a device that includes a first electrode, a second electrode, a first counter electrode that is provided on the first substrate so as to face the second substrate, a second counter electrode that is provided on the second substrate so as to face the first substrate, and a polymer network liquid crystal layer that is enclosed between the first substrate and the second substrate, the method comprising:

• ON-driving the first counter electrode and the second counter electrode by applying a rectangular wave voltage for driving the second counter electrode upon inverting a phase and shifting forward or backward by a minute time Δt with respect to a rectangular wave voltage for driving the first counter electrode,
• wherein the minute time Δt is longer than a charge-and-discharge time based on an electrostatic capacitance between the first counter electrode and the second counter electrode.