US 12,471,195 B1
LED lighting circuit without driving power supply and LED light string
Yuanlong Li, Shenzhen (CN)
Assigned to iLamp Technology Co., Ltd., Shenzhen (CN)
Filed by iLamp Technology Co., Ltd, Shenzhen (CN)
Filed on Apr. 21, 2025, as Appl. No. 19/183,965.
Int. Cl. H05B 45/37 (2020.01); F21S 4/10 (2016.01); F21V 23/06 (2006.01); F21V 25/10 (2006.01); H05B 45/50 (2022.01); F21Y 115/10 (2016.01)
CPC H05B 45/37 (2020.01) [F21S 4/10 (2016.01); F21V 23/06 (2013.01); F21V 25/10 (2013.01); H05B 45/50 (2020.01); F21Y 2115/10 (2016.08)] 11 Claims
OG exemplary drawing
 
1. An LED light string, comprising a LED lighting circuit without a driving power supply, wherein:
the LED lighting circuit without the driving power supply comprises an AC power supply, a rectification module, a current-limiting and voltage-reducing module, and an LED illumination module;
an input terminal of the AC power supply is connected to the rectification module for converting an AC power into a pulsating DC voltage;
the current-limiting and voltage-reducing module comprises at least one limiting unit, with one end connected to an output terminal of the rectification module and an other end connected to the LED illumination module;
the LED illumination module comprises multiple LED beads connected in series and/or parallel, with a total forward voltage drop matching an output voltage of the current-limiting and voltage-reducing module, enabling a stable operation without an independent driver power supply;
the LED light string comprises a light string circuit with multiple mounting portions spaced apart, each provided with an LED lamp assembly;
a first connection terminal and a second connection terminal are provided at two ends of the light string circuit, with a male power connection terminal provided on one end face of the first connection terminal away from the light string circuit, and a female connection terminal provided at a second connection terminal corresponding to the male power connection terminal,
the LED lamp assembly comprises a connection lamp housing and an LED lamp structure;
a connection cavity is provided at one end of the connection lamp housing relative to the LED lamp structure and a connection groove is provided at an other end of the connection lamp housing relative to the light string circuit, with the connection groove surrounding the light string circuit; and
the connection cavity is provided with a first electrode plate relative to the LED lamp structure, and the first electrode plate is connected to the connection groove and abuts against the light string circuit.