LIQUID CRYSTAL DISPLAY DEVICE

摘要

A liquid crystal display apparatus of the present invention includes: a liquid crystal display panel including a liquid crystal cell between a first polarizing plate and a second polarizing plate; and a surface light source device for illuminating the liquid crystal display panel from the back surface side. The surface light source device includes: a light source unit; and a light guide plate for causing light from the light source unit to enter from a light incident surface opposed to the light source unit, and for output ting polarized light from a light output surface opposed to the liquid crystal display panel, the polarized light having directivity of maximum intensity in a direction that forms a predetermined angle from a normal direction of the light output surface in a plane approximately parallel to a light guiding direction of the light. In the polarized light output from the light guide plate, when the normal direction of the light output surface is defined to be at a polar angle of 90°, and the light guiding direction of the light guide plate is defined to be a direction of an azimuth angle of 0°-180°, a ratio La/Lt of integrated intensity La of output light in ranges where the polar angle is 50° to 80° and the azimuth angle is 135° to 225°, 0° to 45°, and 315° to 360° to integrated intensity Lt of total output light is 0.3 or more.