Patent ID: 8500306

Claim:
A backlight unit, comprising: a printed circuit board having at least a first through hole; an LED package, having a bottom surface, comprising a package base enclosing an LED chip and lead frames having a portion extending outside of the package base, the LED package being disposed on a top portion of the printed circuit board corresponding to the first through hole; a bottom plate in direct contact with the printed circuit board; and a heat conducting adhesive disposed in the first through hole to connect an underside surface of the LED package with a top surface of the bottom plate, wherein: the entire interface between the heat conducting adhesive and the bottom plate is above or at a same level as the interface between the bottom plate and the printed circuit board, the LED package is bonded to the bottom plate by the heat conducting adhesive, and the backlight unit is free of a mechanical element provided to bond the LED package to the bottom plate.