Patent ID: 9645305
Date: 2017-05-09
CPC Classifications: G02B

Claim:
1. A backlight unit comprising: a light source comprising a light package arranged on a circuit board, the circuit board extending in a longitudinal direction and the light package emitting light in a direction of emitted light that is perpendicular to the longitudinal direction; a light guiding plate disposed on a side of the light source to guide light emitted from the light source in the direction of emitted light toward an upper surface of the light guiding plate in a direction of guided light; a quantum dot bar disposed between the light source and the light guiding plate and spaced apart from the light source and the light guiding plate, a quantum dot bar receiving unit supporting the quantum dot bar and the light guiding plate and extending in the longitudinal direction, a quantum dot bar cover disposed on an upper side of the quantum dot bar to cover the quantum dot bar, wherein the quantum dot bar is seated on the quantum dot bar receiving unit, wherein the quantum dot bar receiving unit and the light guiding plate are coupled to each other and the quantum dot bar cover and the light guiding plate are coupled to each other, wherein the quantum dot bar receiving unit includes a first protrusion protruding in the direction of guided light and the quantum dot bar cover includes a second protrusion protruding downward toward the light guiding plate wherein the light guiding plate includes a first groove facing the first protrusion and recessed in the direction of guided light and the light guiding plate includes a second groove disposed corresponding to the second protrusion, and wherein the first protrusion is inserted into and coupled with the first groove and the second protrusion is inserted into and coupled with the second groove.