Backlight unit
AssigneeSeoul Semiconductor Co., Ltd.
InventorChung Hoon Lee
Life of this patent
Estimating the term…
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.
Claims20
A backlight unit, comprising:
- a circuit board;
- a light emitting diode disposed on the circuit board and configured to emit a primary light;
- a reflector disposed on the light emitting diode;
- and
- a wavelength converter disposed on the circuit board and configured to convert the primary light,
- wherein the light emitting diode comprises:
- a substrate;
- a light emitting layer disposed on the substrate;
- a first electrode pad electrically connected to a first conductivity type semiconductor layer of the light emitting layer;
- a second electrode pad electrically connected to a second conductivity type semiconductor layer of the light emitting layer;
- and
- a reflective layer disposed on the substrate and configured to reflect the primary light toward the wavelength converter,
- wherein the wavelength converter covers a side and an upper surface of the light emitting diode, and
- wherein the reflector covers an upper surface of the wavelength converter and a lowermost layer of the reflector contacts the upper surface of the wavelength converter.
A backlight unit comprising:
- a circuit board;
- a light emitting diode disposed on the circuit board and configured to emit a primary light;
- a reflector disposed on the circuit board;
- and
- a wavelength converter disposed on the circuit board and configured to convert the primary light,
- wherein the light emitting diode comprises:
- a substrate;
- a light emitting layer disposed on the substrate;
- a first electrode pad electrically connected to a first conductivity type semiconductor layer of the light emitting layer;
- a second electrode pad electrically connected to a second conductivity type semiconductor layer of the light emitting layer;
- and
- a reflective layer disposed on the substrate and configured to reflect the primary light toward the wavelength converter,
- wherein the wavelength converter covers a side and an upper surface of the light emitting diode,
- wherein the reflector covers a side of the wavelength converter and the light emitting diode and a surface of the reflector contacts a surface of the wavelength converter, and
- wherein the wavelength converter comprises a Mn 4+-activated phosphors, which is fluoride compound K2SiF6.
A light emitting module, comprising:
- a circuit board;
- a light emitting diode disposed on the circuit board and configured to emit a primary light;
- a reflector disposed on the light emitting diode;
- a light guide disposed on the circuit board and having an opening region;
- and
- a sealer disposed on the light emitting diode,
- wherein the light emitting diode comprises:
- a substrate;
- a light emitting layer disposed on the substrate;
- a first electrode pad electrically connected to a first conductivity type semiconductor layer of the light emitting layer;
- and
- a second electrode pad electrically connected to a second conductivity type semiconductor layer of the light emitting layer;
- wherein the light guide has an inclined region and is structured to provide an increased light incident area as compared to a case without the inclined region, and
- wherein the sealer is disposed in the opening region.
Dependencies are inferred from the claim text.