Patent ID: 8148897
Filing Date: 2012-04-03
Classification: G02B,G02F,G09G

Abstract:
1. A backlight unit using LED (light emitting diode), the backlight unit comprising a blue light source, a red light source, and a green light source, wherein the green light source comprises a first UV (ultraviolet) LED, the blue light source comprises a second UV LED, and the red light source comprises a third UV LED, wherein at least one of the green, blue and red light source comprises: a packaging frame having a cup-shaped recess recessed downwardly from a surface of the packaging frame; a silicone sub-mount disposed on a bottom of the recess of the package frame; at least one of the a first, second and third UV LEDs is mounted on the silicone sub-mount; a silicone resin is formed on an upper surface of the silicone sub-mount by surface tension to bulgingly surround all surfaces exposed by the silicone sub-mount of the at least one of the first, second and third UV LEDs on the upper surface of the silicone sub-mount, wherein the silicone resin is not directly disposed on the packaging frame; and at least one of a green, blue and red phosphor which is excited by light emitted from at least one of the first, second and third UV LEDs, wherein an upper surface of the silicone sub-mount defines a silicone resin forming region.