Method of making LED light bulb with graphene filament
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United States of America Patent
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Apr 3, 2018
Issued Date -
N/A
app pub date -
May 26, 2015
filing date -
May 26, 2015
priority date (Note) -
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Abstract
A method of making a LED light bulb with the Graphene filament contains steps of: A. providing a flexible substrate, wherein the flexible substrate is flexible printed circuit board (PCB); B. coating graphene-based heat dissipation ink on a back side of the flexible substrate; C. cutting the printed circuit board (PCB) on which a graphene-based heat dissipation film is coated to form plural Graphene filaments; D. fixing the plural Graphene filaments into a light bulb. The flexible substrate has copper lines formed on both sides thereof for electronic circuits and heat conduction, and LED chips are mounted on a front side of the flexible substrate. The graphene-based heat dissipation ink is coated on the back side of the flexible substrate before or after LED chips/phosphor molding and then is dried. In addition, the Graphene filaments are fixed in a bended or arched position.
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International Classification(s)
- F21V:FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES....
- H01L:SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICE....
- F21Y:INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21L,....
- F21K:LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- C10B:DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS....
- H05K:PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAIL....
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