当通电时导通，排列变得有秩序，使光线容易通过；不通电时排列混乱，阻止光线通过。让液晶如闸门般地阻隔或让光线穿透(When energized, the conduction is arranged in an orderly manner so that the light passes easily; when the power is not electrified, the arrangement is confused and prevents light from passing th