Light guide plate and backlight unit having same

摘要

In a light guide plate and a backlight unit, a light guide plate includes a light incident surface, an opposite surface, a top surface, a bottom surface, and a plurality of optical path changing units. The optical path changing units are aligned on at least the bottom surface of the top surface and the bottom surface at a predetermined interval while protruding in parallel to a reference line perpendicular to the light incident surface. Accordingly, power consumption used to generate the light may be reduced.

主权项

1. A backlight unit comprising:
a plurality of light sources, the light sources being individually dimmable and including a first light source; a light guide plate that comprises a light incident surface to receive light directly or indirectly from the plurality of light sources; and a first plurality of optical path changing units integrated with or disposed adjacent to the light guide plate and including a first optical path changing unit, the first optical path changing unit including a curved surface that is convex toward the first light source and no surface that is concave relative to the first light source, the first optical path changing unit being structured to substantially refract light output from the first light source for providing refracted light, wherein each light source among the light sources is placed at a focal length point at a distance relative to a corresponding optical path changing unit among the optical path changing units for the corresponding optical path changing unit to refract light incident onto the corresponding optical path changing unit into parallel light rays.