Patent ID: 9733515
Date: 2017-08-15
CPC Classifications: G02F

Claim:
1. A backlight unit comprising: a first surface light source array; a second surface light source array disposed on an upper portion of the first surface light source array and arranged such that a light emitting surface of the second surface light source array is parallel with a light emitting surface of the first surface light source array; and a reflection plate disposed on a lower portion of the first surface light source array and arranged such that a reflective surface of the reflection plate is parallel with the light emitting surface of the first surface light source array, wherein the second surface light source array is stacked on the first surface light source array such that the first and second surface light source arrays are offset from each other in a plane parallel to the light emitting surfaces wherein a shape and a size of a surface light source block included in the first surface light source array is the same as a shape and a size of a surface light source block included in the second surface light source array, and wherein light source blocks included in the first surface light source array are disposed in a same predetermined pattern as light source blocks included in the second light source array.