Patent ID: 8456588
Filing Date: 2013-06-04
Classification: G02B

Abstract:
1. A liquid crystal display backlight, comprising: a laser light source unit that emits laser light; a transforming optical system that transforms a laser light from the laser light source unit into a linear light; and a light guiding plate that allows the linear light to enter and emits a two-dimensional light from an emission surface in a horizontal direction with respect to a long side of the light guiding plate, wherein a light emission surface of the laser light source unit is disposed in a rear face side of the light guiding plate with respect to the emission surface so that a surface normal line of the light emission surface is in the horizontal direction, or is inclined downward from the horizontal direction, the transforming optical system includes a stationary optical component that does not have a movable portion, and the stationary optical component is disposed in the rear face side of the light guiding plate so that surface normal lines of a light transmission surface and a light reflection surface thereof are all in the horizontal direction or are inclined downward from the horizontal direction.