LED lighting circuit without driving power supply and LED light string

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.