Unique lighting string rectification
AssigneeFiber Optic Designs, Inc.
InventorDavid Allen
Life of this patent
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Abstract
An improved decorative light string circuit comprises full bridge rectification located in or downstream of the front plug, wherein the rectification circuit contains one or more voltage reducing and/or filtering elements in order to reduce or limit LED drive current and reduce (filter) DC ripple and 1 or 2 LED series sets. Additional rectification circuits and LED series sets can be added in parallel to the first in “stacked mode”, with each rectification circuit and LED series set electrically independent of prior and subsequent circuits. This eliminates the rectifying diode current summation load restrictions imposed by prior art and associated safety hazard due to diode overheating.
Claims14
An LED light string comprising:
- an AC input voltage input having a positive terminal and a negative terminal;
- parallel conductor wires electrically connected to the positive and negative terminals of the AC voltage input;
- a first rectification and control circuit defines a full wave rectifier comprising four rectifying diodes electrically connected to the parallel conductor wires;
- a series conductor wire electrically connected to ends of each of said four rectifying diodes of said first rectification and control circuit, said ends of each of said four rectifying diodes being connected at discrete locations along said series conductor wire to provide full wave rectification;
- a plurality of series connected LED lamps electrically connected by said series conductor wire.
12-13. (canceled)
Dependencies are inferred from the claim text.