Liquid crystal lens and liquid crystal display device

A liquid crystal lens, comprising:

• a first substrate;
• a second substrate disposed oppositely to the first substrate;
• a liquid crystal layer disposed between the first substrate and the second substrate, and having liquid crystal molecules;
• and
• multiple lens units, wherein, a first and a second electrode of each of the lens units define an opening width value of one of the multiple lens units, and the first and the second electrode are applied with a same and maximum voltage in the one of the multiple lens units;
• wherein, a metal layer, a first insulation layer, and an electrode layer are stacked on a side of the second substrate adjacent to the first substrate, and the first insulation layer is disposed on the metal layer;
• the electrode layer includes multiple electrodes disposed separately, and the multiple electrodes include the first electrode and the second electrode which are directly disposed on the metal layer, and an adjacent electrode disposed on the first insulation layer, and the adjacent electrode is disposed between the first electrode and the second electrode;
• among the multiple electrodes disposed separately, a height of the first or the second electrode which the maximum voltage is applied on is lower than a height of the adjacent electrode such that the liquid crystal molecules corresponding to the first or the second electrode which the maximum voltage is applied on forms a smallest refractive index in the one of the multiple lens units.