Down backlight unit structure

The present invention discloses a direct type backlight unit structure, the direct type backlight unit structure for a light emitting chip in order to reduce the height to direct red, green and blue light emitting chips are mixed in the structure of the direct type backlight unit for the intensity of white light and further enhance the uniformity of the mixed light. This direct type backlight unit includes a light emitting chip structure, a first reflective layer, a second reflective layer or a plurality of second reflective layer. The first reflective layer is disposed over the light emitting chip of the light emitting chip for reflecting the light emitted from a first portion of the second reflective layer or a plurality of a second reflective layer formed on the first reflection layer for reflecting the light source two parts. A first reflective layer, the reflective material of the second layer or the second reflective layer is a good transmittance of transparent material.