Display device capable of switching two-dimensional display mode and three-dimensional display mode and liquid crystal lens thereof

The invention discloses a liquid crystal lens. The liquid crystal lens comprises a first transparent substrate, a second transparent substrate, a first transparent electrode, a second transparent electrode, a liquid crystal layer, a first orientation film, a second orientation film and a first electric field homogenization layer. The first transparent electrode comprises a plurality of first strip-shaped electrodes, the first strip-shaped electrodes are arranged in the first direction and are parallel to each other, and the first direction is neither parallel nor perpendicular to the side edge of the first transparent substrate. The first electric field homogenization layer is arranged between the first orientation film and the first transparent electrode or between the second orientation film and the second transparent electrode.