Liquid crystal lens

A liquid crystal lens, comprising:

• a first substrate;
• a first active device disposed on the first substrate;
• a first electrode disposed on the first substrate and electrically connected to the first active device;
• a third active device disposed on the first substrate and electrically connected to the first electrode, wherein when the first active device and the third active device are simultaneously driven, a current is generated on the first electrode, and the current flowing through the first electrode increases a temperature of the first electrode;
• a first alignment layer disposed on the first substrate and covering the first electrode;
• a second substrate disposed opposite to the first substrate;
• a second active device disposed on the second substrate;
• a second electrode disposed on the second substrate and electrically connected to the second active device, and the second electrode has an opening;
• a second alignment layer disposed on the second substrate;
• a liquid crystal layer disposed between the first substrate and the second substrate, and the first alignment layer and the second alignment layer align the liquid crystal layer;
• and
• a polarizer disposed at a side of the second substrate, and the second substrate is disposed between the first substrate and the polarizer.