# US 12,000,571 B2 · LED string light, and production method and device thereof

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- Number: US 12,000,571 B2
- Document ID: US12000571B2
- Status: Granted
- Kind: B2
- Application number: 18/310,973
- Filed: 2023-05-02
- Published: 2023-08-24
- Granted: 2024-06-04
- Earliest claimed: 2019-09-06
- Assignees: Zhuhai Bojay Electronics Co. Ltd.
- Applicants: Zhuhai Bojay Electronics Co. Ltd.
- Inventors: Xiwan Shan; Tuxiu Yang; Yundong Ai; Jie Zhang; Qunlin Li; Qiming Liu; Su Yan; Jingtian Wu; Yanyong Liu; Junchao He; Jiahui Cai; Yue Chen
- Web page: https://patentgrep.com/patent/US12000571B2

## CPC

- F21V 21/002: making direct electrical contact, e.g. by piercing (F21V21/35 takes precedence)
- F21S 4/10: with light sources attached to loose electric cables, e.g. Christmas tree lights
- F21V 19/0025: {the fastening means engaging the conductors of the light source, i.e. providing simultaneous fastening of the light sources and their electric connections}
- F21V 23/002: {Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm}
- H05B 45/48: having LEDs organised in strings and incorporating parallel shunting devices
- F21Y 2103/10: comprising a linear array of point-like light-generating elements
- F21Y 2115/10: Light-emitting diodes [LED]
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

An LED string light includes a first conducting wire, a second conducting wire, and a third conducting wire which are arranged in parallel. The first conducting wire, the second conducting wire and the third conducting wire all comprise a conducting wire core and an insulation layer coating a surface of the conducting wire core, and the first conducting wire and the second conducting wire defines a plurality of lamp welding regions. The LED string light also includes a plurality of SMD LEDs respectively disposed at the plurality of lamp welding regions. Each SMD LED has a first welding leg and a second welding leg, which are respectively welded onto the first welding spot and the second welding spot at one corresponding lamp welding region, and the plurality of the SMD LEDs are connected in parallel. A plurality of encapsulation colloids respectively coat the plurality of the SMD LEDs.

## Claims

### Claim 1

An LED (light emitting diode) string light, comprising:
a first conducting wire, a second conducting wire, and a third conducting wire which are arranged in parallel, wherein the first conducting wire, the second conducting wire and the third conducting wire all comprise a conducting wire core and an insulation layer coating a surface of the conducting wire core, and the first conducting wire and the second conducting wire defines a plurality of lamp welding regions, each including a first welding spot on the first conducting wire and a second welding spot on the second conduction wire;
a plurality of surface-mounted-device (SMD) LEDs respectively disposed at the plurality of lamp welding regions, wherein each SMD LED has a first welding leg and a second welding leg, which are respectively welded onto the first welding spot and the second welding spot at one corresponding lamp welding region, and the plurality of the SMD LEDs are connected in parallel; and
a plurality of encapsulation colloids respectively coating the plurality of the SMD LEDs and surfaces of portions of the third conducting wire corresponding to positions of the plurality of the SMD LEDs, to form a plurality of lamp beads.

### Claim 2 (depends on 1)

The LED string light according to claim 1, wherein the first conducting wire, the second conducting wire, and the third conducting wire are enamel-covered wires or rubber-covered wires.

### Claim 3 (depends on 1)

The LED string light according to claim 1, wherein:
the insulation layer of the first conducting wire is removed at intervals of a predetermined length along an axial direction of the first conducting wire to form the first welding spots;
the insulation layer of the second conducting wire is removed at intervals of the predetermined length along an axial direction of the second conducting wire to form the second welding spots, and
positions of the first welding spots respectively correspond to positions of the second welding spots, in a one-to-one fashion, to form the plurality of lamp welding regions.

### Claim 4 (depends on 3)

The LED string light according to claim 3, wherein:
at least one jump wire bridged between the third conducting wire and the first conducting wire or the second conducting wire for electrically connecting the third conducting wire to the first conducting wire or the second conducting wire.