Decorative lighting string with stacked rectification
First Claim
Patent Images
1. 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 front rectification and control circuit defines a full wave rectifier comprising four front rectifying diodes electrically connected to the parallel conductor wires;
series conductor wires electrically connected to ends of each of two rectifying diodes of said front rectification and control circuit;
a rear rectification and control circuit comprising four rear rectifying diodes electrically connected to the parallel conductor wires;
at least one junction box interposed between said front and rear rectification and control circuits, said junction box comprising four junction diodes,wherein positive ends of first two junction diodes being connected in parallel and with negative ends of the first two junction diodes being connected with the positive and negative terminals of the AC voltage input respectively, andwherein negative ends of second two junction diodes being connected together in parallel and positive ends of the second two junction diodes being connected with the positive and negative terminals of the AC voltage input respectively;
a first LED serial set connected between rectifying diodes of the front rectification and control circuit and the first two junction diodes; and
a second LED serial set connected between the second two junction diodes and rectifying diodes of the rear rectification and control circuit.
2 Assignments
0 Petitions
Accused Products
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.
-
Citations
16 Claims
-
1. 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 front rectification and control circuit defines a full wave rectifier comprising four front rectifying diodes electrically connected to the parallel conductor wires; series conductor wires electrically connected to ends of each of two rectifying diodes of said front rectification and control circuit; a rear rectification and control circuit comprising four rear rectifying diodes electrically connected to the parallel conductor wires; at least one junction box interposed between said front and rear rectification and control circuits, said junction box comprising four junction diodes, wherein positive ends of first two junction diodes being connected in parallel and with negative ends of the first two junction diodes being connected with the positive and negative terminals of the AC voltage input respectively, and wherein negative ends of second two junction diodes being connected together in parallel and positive ends of the second two junction diodes being connected with the positive and negative terminals of the AC voltage input respectively; a first LED serial set connected between rectifying diodes of the front rectification and control circuit and the first two junction diodes; and a second LED serial set connected between the second two junction diodes and rectifying diodes of the rear rectification and control circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
Specification