Lighting device

A lighting device comprising:

• a light source;
• and
• first to fourth liquid crystal panels sequentially stacked over the light source,
• wherein each of the first liquid crystal panel and the second liquid crystal panel comprises:
• a substrate;
• a plurality of lower electrodes arranged over the substrate in a stripe shape;
• a first orientation film arranged over the plurality of lower electrodes;
• a liquid crystal layer over the first orientation film;
• a second orientation film arranged over the liquid crystal layer and having an orientation direction orthogonal to that of the first orientation film;
• and
• a counter substrate over the second orientation film,
• wherein each of the third liquid crystal panel and the fourth liquid crystal panel comprises:
• a substrate;
• a first orientation film over the substrate;
• a liquid crystal layer over the first orientation film;
• a second orientation film arranged over the liquid crystal layer and having an orientation direction orthogonal to that of the first orientation film;
• a plurality of upper electrodes arranged over the second orientation film in a stripe shape;
• and
• a counter substrate over the plurality of upper electrodes,
• wherein extending directions of the plurality of lower electrodes of the first liquid crystal panel and the second liquid crystal panel are orthogonal to extending directions of the plurality of upper electrodes of the third liquid crystal panel and the fourth liquid crystal panel,
• wherein, with respect to sequentially arranged first to third lower electrodes arbitrarily selected from the plurality of lower electrodes in each of the first liquid crystal panel and the second liquid crystal panel, a spacing between the first lower electrode and the second lower electrode is different from a spacing between the second lower electrode and the third lower electrode, and
• wherein, with respect to sequentially arranged first to third upper electrodes arbitrarily selected from the plurality of upper electrodes in each of the third liquid crystal panel and the fourth liquid crystal panel, a spacing between the first upper electrode and the second upper electrode is different from a spacing between the second upper electrode and the third upper electrode.

A lighting device comprising:

• a light source;
• and
• first to fourth liquid crystal panels sequentially stacked over the light source,
• wherein each of the first liquid crystal panel and the second liquid crystal panel comprises:
• a substrate;
• a first orientation film arranged over the substrate;
• a liquid crystal layer arranged over the first orientation film;
• a second orientation film arranged over the liquid crystal layer and having an orientation direction orthogonal to that of the first orientation film;
• a plurality of upper electrodes arranged over the second orientation film in a stripe shape;
• and
• a counter substrate over the plurality of upper electrodes,
• wherein each of the third liquid crystal panel and the fourth liquid crystal panel comprises;
• a substrate;
• a plurality of lower electrodes arranged over the substrate in a stripe shape;
• a first orientation film arranged over the plurality of lower electrodes;
• a liquid crystal layer arranged over the first orientation film;
• a second orientation film arranged over the liquid crystal layer and having an orientation direction orthogonal to that of the first orientation film;
• and
• a counter substrate over the second orientation film,
• wherein extending directions of the plurality of upper electrodes of the first liquid crystal panel and the second liquid crystal panel are orthogonal to extending directions of the plurality of lower electrodes of the third liquid crystal panel and the fourth liquid crystal panel,
• wherein, with respect to sequentially arranged first to third upper electrodes arbitrarily selected from the plurality of upper electrodes in each of the first liquid crystal panel and the second liquid crystal panel, a spacing between the first upper electrode and the second upper electrode is different from a spacing between the second upper electrode and the third upper electrode, and
• wherein, with respect to sequentially arranged first to third lower electrodes arbitrarily selected from the plurality of lower electrodes in each of the third liquid crystal panel and the fourth liquid crystal panel, a spacing between the first lower electrode and the second lower electrode is different from a spacing between the second lower electrode and the third lower electrode.