US Patent 9140929 Optical assembly, backlight unit and display apparatus thereof

The present invention relates to an optical assembly, a backlight unit, and a display apparatus thereof. According to an embodiment of the present invention, an optical assembly includes a first layer, a plurality of light sources disposed over the first layer, a second layer that is disposed above the first layer and covering the plurality of light sources, and at least one reflection layer between the first layer and the second layer, wherein the reflection layer includes at least a first portion and a second portion having different reflectances.