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US 9,283,703 B2Granted
Tubular integrated light emitting diode (LED) lamp housing having a heat radiation section and a light transmission section and method for making the same
AssigneeCheil Industries Inc.
InventorsChan Gyun Shin, Hoo Seok Lee, Nam Hyun Kim, Jeong Won Lee, Jong Cheol Lim
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Abstract
An integrated LED lamp housing can include a heat radiation section and a light transmission section. The integrated LED lamp housing can be prepared by co-extruding different polycarbonate resin compositions.
Claims10
A light emitting diode (LED) lamp housing comprising a heat radiation section comprising a heat conductive polycarbonate resin composition;
- and a light transmission section comprising a transparent polycarbonate resin composition,
- wherein the heat conductive polycarbonate resin composition comprises (A) about 30 to about 80% by weight of a polycarbonate resin;
- and (B) about 20 to about 70% by weight of magnesium oxide particles, wherein the magnesium oxide particles (B) include spherical particles having an average diameter of about 30 to about 80 μm, and
- wherein the transparent polycarbonate resin composition comprises (A) about 100 parts by weight of a polycarbonate resin;
- and (C) about 0.1 to about 2 parts by weight of a light-diffusing agent.
2 more elements
A method for preparing a light emitting diode (LED) lamp housing comprising:
- directing a heat conductive polycarbonate resin composition into a first inlet port of a co-extruder comprising a first extruder including the first inlet port and a second extruder including a second inlet port, wherein the heat conductive polycarbonate resin composition comprises (A) about 30 to about 80% by weight of a polycarbonate resin;
- and (B) about 20 to about 70% by weight of magnesium oxide particles, wherein the magnesium oxide particles (B) include spherical particles having an average diameter of about 30 to about 80 μm;
- directing a transparent polycarbonate resin composition into the second inlet port wherein the transparent polycarbonate resin composition comprises (A) about 100 parts by weight of a polycarbonate resin;
- and (C) about 0.1 to about 2 parts by weight of a light-diffusing agent;
- melting/mixing the heat conductive polycarbonate resin composition and transparent polycarbonate resin composition in the heated first extruder and the heated second extruder, respectively;
- directing the melted/mixed heat conductive polycarbonate resin composition from the first extruder into a side of a die having a heat radiation section form and directing the melted/mixed transparent polycarbonate resin composition from the second extruder into another side of the die having a light transmission section form;
- and
- molding the heat conductive polycarbonate resin composition and the transparent polycarbonate resin composition into an integral form within the die by adhering the heat radiation section and the light transmission section to one another.
5 more elements
Dependencies are inferred from the claim text.