Backlight unit and display device

摘要

A backlight unit according to an embodiment includes: a plurality of optical assemblies each including a light source generating light, a light guide plate having a first part through which light travels inside and a second part diffusing upward the light traveling inside through the first part; and a diffusion pattern selectively disposed at the portions corresponding to interfaces between the light guide plates on the optical assemblies.

主权项

1. A backlight unit comprising:
a plurality of optical assemblies, each optical assembly including:
a light source generating light;a light guide plate having a first part through which light travels inside;a second part diffusing the light traveling inside through the first part upwardly; andat least one protrusion protruding from a top of the first part; and a side cover fixing the light source and the light guide plate, wherein the side cover includes:
a first side cover having a first bent portion, a first hole and a second hole; anda second side cover having a second bent portion and a third hole,wherein the first bent portion of the first side cover is coupled to the second bent portion of the second side cover to overlap each other in a side facing the light source, wherein the first side cover contacts the first part between the at least one protrusion and the second part, wherein the light source is disposed between the first side cover and the second side cover, wherein the at least one protrusion is coupled to the first hole to fit and lock the at least one protrusion, wherein the second and third holes are aligned such that the first side cover and the second side cover are fixed by inserting a fixing member, and wherein the light source includes:
a plurality of light emitting diodes disposed at a side of the first part; anda module substrate with the light emitting diodes mounted thereon,wherein the light emitting diodes are arranged diagonally with respect to the at least one protrusion, andwherein the distance between the light emitting diodes around the at least one protrusion is larger than the distance between the other light emitting diodes.