Patent ID: 8922727

Claim:
An image display device, comprising: a liquid crystal lens device including a liquid crystal optical element unit, the liquid crystal optical element unit including a first substrate unit including a first substrate having a first major surface, and a plurality of first electrodes provided on the first major surface to extend along a first direction, the first electrodes being arranged in a direction non-parallel to the first direction, a second substrate unit including a second substrate having a second major surface opposed to the first major surface, and a counter electrode provided on the second major surface, and a liquid crystal layer provided between the first substrate unit and the second substrate unit, the liquid crystal layer having a first alignment direction and a second alignment direction, the first alignment direction being a long-axis direction of liquid crystal molecules on the first substrate unit when projected onto the first major surface, the first alignment direction being orthogonal to the first direction, the second alignment direction being a long-axis direction of liquid crystal molecules on the second substrate unit when projected onto the first major surface, the liquid crystal layer having an alignment twisted between the first alignment direction and the second alignment direction by an angle not less than 5 degrees and not more than 45 degrees along a normal axis of the first major surface; and an image display unit including a display unit, the second substrate unit being disposed between the first substrate unit and the display unit, the display unit being configured to cause image light of polarized light having a polarizing axis parallel to the second alignment direction to be incident on the liquid crystal optical element unit.