Liquid crystal display device

A liquid crystal display device comprising, in the given order:

• a first substrate;
• a liquid crystal layer containing liquid crystal molecules;
• and
• a second substrate,
• wherein the first substrate includes a first electrode, a second electrode positioned closer to the liquid crystal layer than the first electrode is, and an insulating film between the first electrode and the second electrode,
• the second electrode is provided with an opening,
• in a no-voltage-applied state, where no voltage is applied between the first electrode and the second electrode, the liquid crystal molecules are aligned parallel to the first substrate,
• in a plan view, a contour of the opening includes a first inclined contour along a first line segment extending from an upper end portion of the opening to a right end portion of the opening, a second inclined contour along a second line segment extending from the upper end portion to a left end portion of the opening, a third inclined contour along a third line segment extending from a lower end portion of the opening to the left end portion, and a fourth inclined contour along a fourth line segment extending from the lower end portion to the right end portion, and
• in a plan view, the first, second, third, and fourth line segments are each inclined with respect to an alignment azimuth of the liquid crystal molecules in the no-voltage-applied state.

A liquid crystal display device comprising, in the given order:

• a first substrate;
• a liquid crystal layer containing liquid crystal molecules;
• and
• a second substrate,
• wherein the liquid crystal display device has a definition of not more than 920 ppi,
• the liquid crystal molecules have positive anisotropy of dielectric constant,
• the first substrate includes a first electrode, a second electrode positioned closer to the liquid crystal layer than the first electrode is, and an insulating film between the first electrode and the second electrode,
• the second electrode is provided with an opening,
• in a no-voltage-applied state, where no voltage is applied between the first electrode and the second electrode, the liquid crystal molecules are aligned parallel to the first substrate, and
• a planar shape of the opening satisfies the following (Formula 1) to (Formula 5):
• 0.575≤a/P (Formula 1)
• 0.850≤b/P (Formula 2)
• 0.267≤(a−c)/P≤0.417 (Formula 3)
• 0.075≤(a−d)/P≤0.183 (Formula 4)
• 0.190≤(a+b+c+d)/P2 (Formula 5)
• wherein a, b, c, and d respectively represent a length (μm) of the opening on a first straight line, on a second straight line, on a third straight line, and on a fourth straight line, P represents a pixel pitch (μm),
• the first straight line is a straight line Which is orthogonal to an initial alignment azimuth of the liquid crystal molecules and has the longest length that divides the opening,
• the second straight line is a straight line which is parallel to the initial alignment azimuth of the liquid crystal molecules and has the longest length that divides the opening,
• the third straight line is a straight line which is parallel to the first straight line and is 1 μm away from one end portion of the opening on the second straight line, and
• the fourth straight line is a straight line which is parallel to the first straight line, is 2 win away from the first straight line, and is located between the first straight line and the third straight line.