Stereoscopic image display apparatus

A stereoscopic image display apparatus, comprising:

• an image display unit having a plurality of pixels;
• a liquid crystal lens array, provided on the image display unit, including,
• a pair of transparent substrates provided opposite to each other across a liquid crystal layer of the liquid crystal lens array,
• a planar electrode provided on one of the pair of transparent substrates, and
• strip-shaped electrodes provided on the other of the pair of transparent substrates at respective corresponding positions of the liquid crystal lens array,
• wherein the strip-shaped electrodes are disposed at intervals in a pitch direction of the liquid crystal lens array such that end electrodes are located at both ends of each liquid crystal lens, and a center electrode is located at a center part of the liquid crystal lens;
• and control unit configured to control potentials provided to the planar electrode and the center electrode, the difference of the potential between the planar electrode and the center electrode is set smaller than a rising voltage Vth of the liquid crystal layer;
• wherein a third voltage V3 larger in absolute value than a first voltage V1 applied to the planar electrode and a second voltage V2 applied to the center electrode and also larger than the rising voltage is applied to the end electrodes;
• and
• wherein, with a refractive index distribution being formed across an entire thickness direction of each liquid crystal lens, and the length in a pitch direction of the liquid crystal lens array being 1, the following relation is satisfied
• 0.075<ws<0.15
• 0.15<wg<0.29
• where the width of the end electrodes is ws, and the width of the center electrode is wg.