Patent ID: 7427145
Filing Date: 2008-09-23
Classification: G02B,G02F,H01L,Y10S

Abstract:
1. A backlight unit having light emitting diodes comprising: a substrate disposed thereon with first conductive lines; a plurality of light emitting diodes each bonded to an upper surface of the substrate and spaced a predetermined distance apart from the substrate, and electrically connected to the first conductive lines of the substrate; a transparent resin encompassing the plurality of light emitting diodes and formed on the upper surface of the substrate; and optical transmission means disposed on an upper surface of the transparent resin, the means including first means for preventing light emitted from the light emitting diodes from being totally reflected by allowing an incident angle of the light to be less than a threshold angle, and second means for diffusing and emitting the light, wherein the substrate is further formed thereon with a plurality of first grooves, and each floor surface of the plurality of first grooves is bonded to the light emitting diode, and wherein each interior of the plurality of grooves is bonded to a sub-mount substrate formed thereon with a second groove, a floor surface of the second groove formed with a conductive pattern, and formed thereon with a second conductive line electrically connected to the conductive pattern, and wherein each light emitting diode is flip-chip bonded to the conductive pattern existing on the floor surface of the second groove of the sub-mount substrate, and the second conductive line of the sub-mount substrate and the corresponding first conductive line of the substrate are wire-bonded.