Backlight unit
AssigneeSeoul Semiconductor Co., Ltd.
InventorChung Hoon Lee
Life of this patent
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Abstract
The present invention relates to a backlight unit for use in a display device. The backlight unit includes a circuit board, at least one light-emitting diode chip mounted on the circuit board, a plurality of reflection members arranged on the upper part of the light-emitting diode chip, and a light diffusing member. The light diffusing member has an incident surface on which light enters and an emitting surface from which light is emitted. The light diffusing member is arranged on the upper part of the circuit board. The plurality of reflection members are stacked on each other and reflect a part of light emitted from the upper surface of the light-emitting diode chip.
Claims18
A backlight unit comprising:
- a circuit board;
- at least one light emitting diode chip disposed on the circuit board;
- at least one reflector disposed on the light emitting diode chip;
- and
- at least one light diffuser covering the light emitting diode chip and the reflector,
- wherein the light diffuser comprises a cavity corresponding to the light emitting diode chip and the reflector disposed inside the light diffuser,
- the light emitting diode chip comprising:
- a substrate;
- a light emitting structure disposed at a lower side of the substrate;
- a transparent electrode layer disposed at a lower surface of the light emitting structure;
- a first electrode pad electrically connected to a first conductivity type semiconductor layer of the light emitting structure;
- a second electrode pad electrically connected to a second conductivity type semiconductor layer of the light emitting structure;
- and
- a reflective layer formed to cover at least a portion of a lower side of the light emitting structure.
Dependencies are inferred from the claim text.