Patent ID: 7995158
Filing Date: 2011-08-09
Classification: G02B,G02F

Abstract:
1. A liquid crystal display apparatus comprising: a light source; a liquid crystal display panel; and condenser sheets for condensing light emitted from the light source and guiding the light toward the liquid crystal display panel, the condenser sheets including: a first condenser sheet in which ridges of a first corrugated structure having a first light-condensing characteristic are periodically arranged on one surface of the first condenser sheet in a longitudinal direction of the liquid crystal display panel; and a second condenser sheet in which ridges of a second corrugated structure having a second light-condensing characteristic are periodically arranged on one surface of the second condenser sheet in a lateral direction of the liquid crystal display panel, wherein, when a longitudinal, lateral, or sub-pixel pitch of the liquid crystal display panel is defined as Pp, an array pitch of the first corrugated structure is defined as Px, and an array pitch of the second corrugated structure is defined as Py, the following relationships are satisfied: Px is approximately equal to Pp/(14−0.045Pp) and Py is approximately equal to Pp/(11.5−0.032Pp) such that moiré patterns are not produced by the condenser sheets and the liquid crystal display panel, and the condenser sheets do not significantly reduce the luminance from the liquid crystal display.