Thermally conductive lamp reflector
First Claim
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1. A thermally conductive lamp reflector having a thermal conductivity of greater than 3 W/m°
- K, comprising;
a shell having a surface; and
a metallized layer on the surface of the shell;
said shell including about 30% to about 80% by volume of a liquid crystal polymer matrix and about 20% to about 70% by volume of a thermally conductive PITCH-based carbon fiber.
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Abstract
A thermally conductive lamp reflector is provided that dissipates heat from a light source within the reflector. The reflector assembly includes a shell having a metallized layer on its surface. The shell is made from a composition including about 30% to about 80% by volume of a base polymer matrix and about 20% to about 70% by volume of a thermally conductive filler material. The reflector has a thermal conductivity of greater than 3 W/m° K and preferably greater than 22 W/m° K. The reflectors can be used in automotive headlamps, flashlights, and other lighting fixtures. A method of forming the lamp reflector is also provided.
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Citations
10 Claims
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1. A thermally conductive lamp reflector having a thermal conductivity of greater than 3 W/m°
- K, comprising;
a shell having a surface; and
a metallized layer on the surface of the shell;
said shell including about 30% to about 80% by volume of a liquid crystal polymer matrix and about 20% to about 70% by volume of a thermally conductive PITCH-based carbon fiber. - View Dependent Claims (2, 3)
- K, comprising;
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4. A thermally conductive lamp reflector having a thermal conductivity of greater than 3 W/m°
- K, comprising;
a shell having a surface; and
a metallized layer on the surface of the shell;
said shell including;
i) about 30% to about 60% by volume of a liquid crystal polymer matrix, ii) about 25% to about 60% by volume of a first thermally conductive filter material having an aspect ratio of 10;
1 or greater, and iii) about 10% to about 15% by volume of a second thermally conductive filler material having an aspect ratio of 5;
1 or less, wherein the first thermally conductive material is PITCH-based carbon fiber.- View Dependent Claims (5, 6, 7)
- K, comprising;
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8. A method of forming a thermally conductive lamp reflector having a thermal conductivity of greater than 3 W/m°
- K, comprising the steps of;
molding a shell, having an inner surface, said shell including about 30% to about 80% by volume of a liquid crystal polymer matrix and about 20% to about 70% by volume of a thermally conductive PITCH-based carbon fiber; and
depositing a layer of metallized material on the inner surface of the shell. - View Dependent Claims (9, 10)
- K, comprising the steps of;
Specification