CN215061446U

CN215061446U - LED lamp string with single wire and lighting device

Info

Publication number: CN215061446U
Application number: CN202121152777.1U
Authority: CN
Inventors: 单西万; 杨土秀; 李群林; 艾云东; 张�杰; 吴景天; 何华; 刘启明; 陈悦; 闫肃
Original assignee: Zhuhai Bojay Electronics Co Ltd
Current assignee: Zhuhai Bojay Electronics Co Ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2021-12-07
Anticipated expiration: 2031-05-26

Abstract

The utility model discloses a LED lamp cluster and lighting device of single wire, the LED lamp cluster of single wire includes: the composite conductor core is formed by compounding at least one first conductor layer extending along the direction of the central axis, at least one second conductor layer extending along the direction of the central axis and an insulating layer positioned between the first conductor layer and the second conductor layer; and the lamp beads comprise at least one surface-mounted LED luminous piece and a packaging colloid coated on the surface of the at least one surface-mounted LED luminous piece, and the anode and the cathode of the at least one surface-mounted LED luminous piece are respectively electrically connected with the at least one first conductor layer and the at least one second conductor layer. The utility model discloses a LED lamp cluster of single wire has light in weight, small, advantage with low costs.

Description

LED lamp string with single wire and lighting device

Technical Field

The utility model relates to the field of lighting technology, especially, relate to a LED lamp cluster and lighting device of single wire.

Background

The LED lamp has been widely used because of its advantages of small size, low power consumption, long service life, high brightness, low heat, environmental protection, etc. With the development of LED technology, LED lamps are more and more in form, and LED lamp strings in LED products are not only applied to scene-response decoration of various festivals such as Christmas and the like, but also applied to home decoration, urban lighting engineering and various entertainment places. LED lamps have incomparable advantages with conventional incandescent lamps: the colorful color-changing lamp has the advantages that the colorful color-changing lamp is gorgeous, various changes of colors can be realized, the energy consumption is effectively reduced, the formed colorful color-changing lamp not only can play a role in illumination, but also has a decorative effect, and the festive atmosphere is added to different programs and different occasions.

The existing LED lamp string generally comprises more than two wires which are arranged side by side, a plurality of patch LEDs which are attached to the wires at certain intervals along the length direction of the wires and packaging colloid which packages the patch LEDs in the wires, wherein the more than two wires are enameled wires which are mutually independent or rubber wires which are connected together through an insulating rubber. The size of the wires and the size of the surface mounted LED are limited, and the LED lamp string is large in size, heavy in weight, low in flexibility and not suitable for being used in some fine occasions (such as a display panel). In order to solve this problem, the LED light string in the prior art adopts a method of reducing the diameter of the conducting wire and the size of the patch LED to reduce the volume of the LED light string (for example, chinese patent publication No. CN 209926070U). However, in order to ensure the strength requirement of the LED lamp string, the diameter range of the reducing wire is limited, so the volume size of the LED lamp string is reduced limitedly; moreover, the cost is high.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned prior art current situation, the utility model aims to solve the technical problem that a LED lamp cluster of single wire that the size is little, light in weight is provided. Another technical problem to be solved by the present invention is to provide a lighting device using the LED string with a single wire.

In order to solve the technical problem, the utility model provides a LED lamp cluster of single wire, include: a conductor comprising a composite conductor core, said composite conductor core being formed by compounding at least one first conductor layer extending along an axial direction of said conductor, at least one second conductor layer extending along the axial direction of said conductor, and an insulating layer therebetween; and a plurality of lamp pearls, it is a plurality of the lamp pearl along the axis direction of wire is arranged in order to set for the distance interval, the lamp pearl all includes at least one SMD LED light emitting component and cladding at least one SMD LED light emitting component's the encapsulation colloid on the surface, at least one SMD LED light emitting component's positive pole and negative pole respectively with at least one first conductor layer and at least one second conductor layer electric connection.

The utility model discloses a LED lamp cluster of single wire uses compound conductor to replace traditional enameled wire or rubber line, and compound conductor layer and the integrative compound of insulating layer of compound conductor are in the same place, compare with traditional enameled wire or rubber line, and compound conductor core 11's cross-sectional area is littleer, weight is lighter, size and weight that can greatly reduced LED lamp cluster have promoted LED lamp cluster quality, have extended the use occasion of LED lamp cluster.

In one embodiment, at least one of the first conductor layers and at least one of the second conductor layers are arranged in a direction perpendicular to an axis of the conductive line.

In one embodiment, at least one of the surface mount type LED lighting elements of the lamp bead is located on one side of the composite lead core or located on two opposite sides of the composite lead core, and the directions of the positive electrode and the negative electrode of the surface mount type LED lighting element located on the same side are the same or opposite.

In one embodiment, at least one of the first conductor layers and at least one of the second conductor layers are arranged along a circumferential direction centered on a central axis of the conductive wire.

In one embodiment, the lamp bead comprises more than two patch type LED light emitting members, and the more than two patch type LED light emitting members are arranged along a circumferential direction with a central axis of the lead as a center.

In one embodiment, at least one of the first conductor layers and at least one of the second conductor layers are coaxially arranged in order from the inside to the outside of the axis of the conductive wire.

In one embodiment, the composite wire core on one side or two sides of the central axis of the wire corresponding to the position of the bead is cut along the axial direction of the wire to expose the first conductor layer and the second conductor layer to form a first welding part and a second welding part, and the anode and the cathode of the patch type LED light emitting element are electrically connected with the first welding part and the second welding part respectively.

In one embodiment, the cross-section of the composite wire core is circular, elliptical or polygonal.

In one embodiment, the surface of the patch type LED luminous element facing the composite wire core is provided with a groove matched with the surface shape of the composite wire core.

In one embodiment, the first conductive layer and the second conductive layer are made of Cu, Al, Ag, or an alloy thereof, and the insulating layer is made of a nonmetal or a metal oxide.

In one embodiment, the conductor further comprises an insulating sheath coated on part or all of the surface of the composite conductor core.

In one embodiment, the insulating sheath is made of insulating paint or insulating plastic.

In one embodiment, the patch type LED luminous element is an LED, an ICLED or an HVLED.

In one embodiment, the lamp also comprises a plurality of partially or completely transparent or semitransparent decorating parts, and the decorating parts are respectively coated outside the lamp beads.

In another embodiment of the present invention, a lighting device is provided, which comprises a control box and the LED lamp string with a single wire, wherein the positive output end and the negative output end of the control box are respectively connected to the first conductor layer and the second conductor layer of the LED lamp string.

In one embodiment, the control box includes a connection circuit board, at least one first connection line, at least one second connection line, and a via hole are disposed on the connection circuit board, at least one first conductive portion electrically connected to at least one first connection line and at least one second conductive portion electrically connected to at least one second connection line are disposed on an inner wall of the via hole, one end of the wire of the LED light string is inserted into the via hole, and at least one first conductive layer and at least one second conductive layer of the wire are welded to at least one first conductive portion and at least one second conductive portion, respectively.

The advantageous effects of the additional features of the present invention will be explained in the detailed description of the preferred embodiments of the present description.

Drawings

Fig. 1 is an isometric view of a single wire LED light string of embodiment 1 of the present invention;

FIG. 2 is a front view of the single wire LED light string of FIG. 1;

FIG. 3 is a cross-sectional view taken along line C-C of FIG. 1;

FIG. 4 is a schematic circuit diagram of the single wire LED light string of FIG. 1;

fig. 5 is an isometric view of a single wire LED light string of embodiment 2 of the present invention;

fig. 6 is a cross-sectional view of the LED light string with a single wire according to embodiment 3 of the present invention, with the encapsulant omitted;

fig. 7 is a cross-sectional view of the LED light string with a single wire according to embodiment 4 of the present invention, with the encapsulant omitted;

fig. 8 is a cross-sectional view of the LED light string with a single wire according to embodiment 5 of the present invention, with the encapsulant omitted;

fig. 9 is a cross-sectional view of the LED light string with a single wire according to embodiment 6 of the present invention, with the encapsulant omitted;

fig. 10 is an isometric view of a single wire LED light string according to embodiment 7 of the present invention;

fig. 11 is a cross-sectional view of the LED light string with a single wire according to embodiment 7 of the present invention, with the encapsulant omitted;

fig. 12 is a cross-sectional view of the single-wire LED light string of the present invention according to embodiment 8, with the encapsulant omitted;

fig. 13 is a cross-sectional view of the single-wire LED light string of the present invention in embodiment 9, with the encapsulant omitted;

fig. 14 is a cross-sectional view of a single wire LED light string according to embodiment 10 of the present invention without the encapsulant;

FIG. 15 is a schematic diagram of the LED light string lighting device of FIG. 1 with a single wire;

FIG. 16 is a schematic diagram of the connection between the wires of the LED light string and the control box.

Description of reference numerals: 10. a wire; 11. a composite wire core; 111. a first conductor layer; 112. a second conductor layer; 113. an insulating layer; 114. a first weld; 115. a second weld; 12. insulating a wire sheath; 20. A lamp bead; 21. a surface mount type LED light emitting piece; 211. a positive electrode; 212. a negative electrode; 213. a groove; 22. packaging the colloid; 30. a control box; 31. connecting the circuit board; 311. a via hole; 312. a first conductive portion; 313. a second conductive portion.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

Fig. 1 is an isometric view of a single-wire LED light string according to embodiment 1 of the present invention, fig. 2 is a front view of the single-wire LED light string shown in fig. 1, fig. 3 is a cross-sectional view taken along line C-C in fig. 1, and fig. 4 is a schematic circuit diagram of the single-wire LED light string shown in fig. 1. As shown in fig. 1-4, the single-wire LED light string of this embodiment 1 includes a wire 10 and a plurality of beads 20 arranged at intervals along an axial direction of the wire 10.

The lead 10 has a central axis X, the lead 10 includes a composite lead core 11, and the composite lead core 11 is formed by combining at least one first conductor layer 111 extending along the central axis X, at least one second conductor layer 112 extending along the central axis X, and an insulating layer 113 located therebetween. The material of the first conductive layer 111 and the second conductive layer 112 may be Cu, Al, Ag, or an alloy thereof, the material of the insulating layer 113 may be a nonmetal or a metal oxide, and the metal oxide may be an oxide of one or more metal elements of Ni, Nb, Cr, Fe, Al, Zr, Ti, V, W, Mo, and Cu. Compared with the traditional enameled wire or rubber wire, the cross-sectional area of the composite wire core 11 is smaller, the weight is lighter, the size and the weight of the LED lamp string can be greatly reduced, the quality of the LED lamp string is improved, and the use occasions of the LED lamp string are expanded.

In the present embodiment, the at least one first conductor layer 111 and the at least one second conductor layer 112 are arranged in a direction perpendicular to the central axis X (i.e., a direction indicated by an arrow a in fig. 3). As an example, the number of the first conductor layer 111, the second conductor layer 112, and the insulating layer 113 is one, the cross section of the insulating layer 113 is in a line shape, the cross sectional shapes of the first conductor layer 111 and the second conductor layer 112 are approximately semicircular, and the first conductor layer 111 and the second conductor layer 112 are oppositely disposed on both sides of the insulating layer 113 such that the cross sectional shape of the composite wire core 11 is circular. Of course, the cross-sectional shape of the composite wire core 11 may also be oval, polygonal, or rectangular.

Preferably, in order to prevent the first conductor layer 111 and the second conductor layer 112 from contacting other conductive objects to cause leakage, the conductor 10 in this embodiment further includes an insulating sheath 12 covering part or all of the surface of the composite conductor core 11. The material of the insulated wire sheath 12 can be insulated paint or insulated plastic. In the embodiment, since the two conductive layers are separated from each other by the insulating layer 113, short circuit does not occur between the two conductive layers, and therefore, the insulating wire sheath 12 can be omitted in some places where the requirement for leakage current is not high.

The plurality of lamp beads 20 (as an example, the number of the lamp beads 20 in this embodiment is 7) are arranged at intervals along the central axis X direction, each of the lamp beads 20 includes at least one surface mount type LED lighting element 21 and an encapsulant 22 coated on the surface of the at least one surface mount type LED lighting element 21, and the anode 211 and the cathode 212 of the at least one surface mount type LED lighting element 21 are electrically connected to the at least one first conductor layer 111 and the at least one second conductor layer 112, respectively. In this embodiment, each of the lamp beads 20 includes one or more than one surface mount type LED lighting element 21, the surface mount type LED lighting element 21 is located on one side of the composite conductor core 11, and the anode 211 and the cathode 212 of the surface mount type LED lighting element 21 are electrically connected to the first conductor layer 111 and the second conductor layer 112 by laser welding respectively.

Preferably, the surface of the surface-mount LED lighting element 21 facing the composite conductor core 11 is provided with a groove 213 matching with the surface shape of the composite conductor core 11, so that the surface-mount LED lighting element 21 and the composite conductor core 11 are closely attached together, and the volume of the lamp bead is smaller.

The patch type LED luminous element 21 in the embodiment is an ICLED, the ICLED directly encapsulates an IC in a standard LED size, the difficulty of product technology is reduced in production, extra space required by an independent external IC is reduced in size, and the single-point controllable full-color control capability is met in color. The ICLED is internally provided with a carrier signal processing module, and control signals of the ICLED are transmitted in two modes, wherein one mode is to load waveforms on the first conductor layer 111 and the second conductor layer 112 and transmit signals, so that the power supply and the signals are transmitted in the same line. In another mode, the insulating layer 113 is made of a metal oxide insulating material, and a waveform is loaded on the insulating layer 113 to achieve the purpose of signal transmission. The surface mount LED lighting element 21 may also be a common single color LED, such as a white LED, a blue LED, a flash LED, etc. In addition, the patch type LED lighting member 21 may also be an HVLED (i.e., a high voltage LED).

The encapsulant 22 may be a UV glue or a general curing glue, and the cross-sectional profile of the encapsulant 22 may be circular, oval, square, etc.

Preferably, the LED light string with a single wire further comprises a plurality of partially or completely transparent or semitransparent decorative pieces (not shown in the figure), and the plurality of decorative pieces are respectively coated outside the plurality of lamp beads. The decorative part can increase the beauty of the product and protect the lamp beads. The decoration part can be directly injection-molded with the lamp string to be integrally formed, or the LED lamp string is firstly produced and then a plurality of decoration parts are assembled with the LED lamp string.

Fig. 5 is an isometric view of a single wire LED light string according to embodiment 2 of the present invention. As shown in the figure, each of the lamp beads 20 in this embodiment includes two patch LED lighting elements 21, the two patch LED lighting elements 21 are located on the same side of the direction of the composite lead core 11, and the directions of the positive electrode 211 and the negative electrode 212 of the two patch LED lighting elements 21 are opposite. In this way, when the power is supplied in the forward direction (i.e., the first conductor layer 111 is connected to the positive electrode of the power supply, and the second conductor layer 112 is connected to the negative electrode of the power supply), the patch type LED lighting element 21 positioned on the left side emits light, and when the power is supplied in the reverse direction (i.e., the first conductor layer 111 is connected to the negative electrode of the power supply, and the second conductor layer 112 is connected to the positive electrode of the power supply), the patch type LED lighting element 21 positioned on the right side emits light, and the patch type LED lighting element 21 positioned on the left side does not emit light.

Fig. 6 is a cross-sectional view of the single-wire LED light string according to embodiment 3 of the present invention, after the encapsulant 22 is omitted. As shown in the figure, each lamp bead 20 in the embodiment comprises two patch type LED light emitting members 21, and the two patch type LED light emitting members 21 are respectively located at two sides of the composite conductor core 11, so that the light emitting area of the LED can be increased, the brightness of the lamp beads 20 is improved, and the utilization rate of the conductor can be improved. In this embodiment, the polarities of the two patch-type LED light emitting members 21 in the same lamp bead 20 are the same, that is, the anodes 211 of the two patch-type LED light emitting members 21 are electrically connected to the first conductor layer 111, and the cathodes 212 of the two patch-type LED light emitting members 21 are electrically connected to the second conductor layer 112. As an alternative, the polarities of the two patch LED lighting elements 21 in the same lamp bead 20 may also be opposite, that is, the anode 211 of one patch LED lighting element 21 is electrically connected to the first conductor layer 111, the cathode 212 is electrically connected to the second conductor layer 112, the anode 211 of the other patch LED lighting element 21 is electrically connected to the second conductor layer 112, and the cathode 212 is electrically connected to the first conductor layer 111.

Fig. 7 is a cross-sectional view of the single-wire LED light string according to embodiment 4 of the present invention, without the encapsulant 22. As shown in the drawing, the cross section of the composite conductive wire core 11 in the present embodiment is rectangular, the composite conductive wire core 11 is formed by combining one first conductive layer 111, two second conductive layers 112, and an insulating layer 113 located therebetween, and the one first conductive layer 111 and the two second conductive layers 112 are arranged along a direction perpendicular to the central axis X (i.e., a direction indicated by an arrow B in fig. 7). Each lamp bead 20 includes two patch-type LED light emitting members 21, anodes 211 (or cathodes 212) of the two patch-type LED light emitting members 21 are electrically connected to the first conductor layer 111, and cathodes 212 (or anodes 211) of the two patch-type LED light emitting members 21 are electrically connected to the two second conductor layers 112, respectively. In addition, the colors of the two patch LED lighting members 21 may be set to be different.

Fig. 8 is a cross-sectional view of the single-wire LED light string according to embodiment 5 of the present invention, without the encapsulant 22. As shown in the drawings, the LED light string with a single wire in this embodiment has substantially the same structure as the LED light string in embodiment 3, except that: the at least one first conductor layer 111 and the at least one second conductor layer 112 are arranged along a circumferential direction centered on the central axis X. As an example, the cross section of the composite conductive wire core 11 is circular, the number of the first conductive layers 111 and the second conductive layers 112 is two, the cross sections of the first conductive layers 111 and the second conductive layers 112 are 90-degree sectors, and the cross section of the insulating layer 113 is in a cross shape. Each lamp bead 20 comprises two patch type LED light emitting members 21, the two patch type LED light emitting members 21 are arranged in the circumferential direction with the central axis X as the center, the anode 211 and the cathode 212 of one patch type LED light emitting member 21 are respectively welded with one first conductor layer 111 and one first conductor layer 111, and the anode 211 and the cathode 212 of the other patch type LED light emitting member 21 are respectively welded with the other first conductor layer 111 and the other first conductor layer 111. Compared with the embodiment 2, the LED lamp string of the present embodiment can realize the independent control of the two surface mount LED lighting elements 21 in the lamp bead 20 under the same diameter.

Fig. 9 is a cross-sectional view of a single wire LED light string according to embodiment 6 of the present invention without the encapsulant 22. As shown in the drawings, the LED light string with a single wire in this embodiment has substantially the same structure as the LED light string in embodiment 5, except that: the polarities of the positive electrode 211 and the negative electrode 212 of the two patch type LED luminous pieces 21 are opposite, when the LED luminous pieces are electrified in the forward direction, one of the patch type LED luminous pieces 21 emits light, the other patch type LED luminous piece 21 does not emit light, and when the LED luminous pieces are electrified in the reverse direction, one of the patch type LED luminous pieces 21 does not emit light, and the other patch type LED luminous piece 21 emits light, so that the electrodeless effect is achieved.

Fig. 10 is an isometric view of a single wire LED light string according to embodiment 7 of the present invention, and fig. 11 is a cross-sectional view of the single wire LED light string without encapsulant 22. As shown in fig. 10 and 11, the LED string with a single wire in this embodiment has substantially the same structure as the LED string in embodiment 1, except that: the first conductor layer 111 and the second conductor layer 112 are coaxially arranged in order from the central axis X to the outside. The composite conductor core 11 on one side or two sides of the central axis X corresponding to the position of the bead 20 is cut along the central axis X to expose the first conductor layer 111 and the second conductor layer 112 to form a first welding portion 114 and a second welding portion 115, and the anode 211 and the cathode 212 of the surface mount LED light emitting element 21 are electrically connected to the first welding portion 114 and the second welding portion 115, respectively. In this embodiment, the numbers of the first conductor layer 111, the second conductor layer 112 and the insulating layer 113 are all one, the first conductor layer 111 is located at the center, the insulating layer 113 and the second conductor layer 112 are sequentially coated on the first conductor layer 111, the position of the composite conductor core 11 on one side of the central axis X, which corresponds to the position of the lamp bead 20, is cut along the central axis X to expose the first conductor layer 111 and the second conductor layer 112 to form the first welding portion 114 and the second welding portion 115, the lamp bead 20 includes a surface mount type LED light emitting element 21, and the anode 211 and the cathode 212 of the surface mount type LED light emitting element 21 are respectively welded with the first welding portion 114 and the second welding portion 115.

Fig. 12 is a cross-sectional view of a single wire LED light string according to embodiment 8 of the present invention without encapsulant 22. As shown in the drawings, the LED string with a single wire in this embodiment has substantially the same structure as the LED string in embodiment 7, except that: in this embodiment, the number of the first conductive layers 111 and the number of the insulating layers 113 are two, the number of the second conductive layers 112 is one, the portions of the composite conductive wire core 11 on both sides of the central axis X corresponding to the position of the lamp bead 20 are cut along the central axis X, so as to expose the first conductor layer 111 and the second conductor layer 112 to form a first welding portion 114 and a second welding portion 115, the lamp bead 20 includes two surface mount type LED light emitting elements 21, the two surface mount type LED light emitting elements 21 are respectively located at two sides of the composite conductor core 11, an anode 211 of one surface mount type LED light emitting element 21 is electrically connected with the first welding portion 114 of the middle first conductor layer 111, the cathode 212 of the surface mount type LED light emitting element 21 is electrically connected to the second soldering portion 115 of the second conductive layer 112, the anode 211 of another surface mount type LED light emitting element 21 is electrically connected to the first soldering portion 114 of the first conductive layer 111, the cathode 212 of the patch LED light emitting device 21 is electrically connected to the second soldering portion 115 of the second conductive layer 112.

Fig. 13 is a cross-sectional view of a single wire LED light string according to embodiment 9 of the present invention without encapsulant 22. As shown in the drawings, the LED string with a single wire in this embodiment has substantially the same structure as the LED string in embodiment 7, except that: the cross-section of the composite wire core 11 is rectangular.

Fig. 14 is a cross-sectional view of a single wire LED light string according to embodiment 10 of the present invention without encapsulant 22. As shown in the drawings, the LED light string with a single wire in this embodiment has substantially the same structure as the LED light string in embodiment 8, except that: the cross-section of the composite wire core 11 is rectangular.

In another embodiment of the present invention, there is provided a lighting device, as shown in fig. 15, which includes a control box 30 and the LED string with single wire in the above embodiments 1 to 9. The output end of the control box 30 is connected to the first conductor layer 111 and the second conductor layer 112 of the LED string. The control box 30 provides driving voltage and control signals for the LED string.

As shown in fig. 16, preferably, the control box 30 includes a connection circuit board 31, at least one first connection line (not shown), at least one second connection line (not shown) and a via hole 311 are disposed on the connection circuit board 31, a shape of the via hole 311 matches a cross-sectional shape of a wire, at least one first conductive portion 312 electrically connected to the at least one first connection line and at least one second conductive portion 313 electrically connected to the at least one second connection line are disposed on an inner wall of the via hole 311, one end of the wire of the LED string is inserted into the via hole 311, and the at least one first conductive layer 111 and the at least one second conductive layer 112 of the wire are respectively welded to the at least one first conductive portion 312 and the at least one second conductive portion 313. The LED lamp string and the control box 30 are connected in this way, and the LED lamp string and control box has the advantages of simple structure, low cost and high assembly efficiency.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A single wire LED light string, comprising:

a conductor comprising a composite conductor core, said composite conductor core being formed by compounding at least one first conductor layer extending along an axial direction of said conductor, at least one second conductor layer extending along the axial direction of said conductor, and an insulating layer therebetween; and

a plurality of lamp pearls, it is a plurality of the lamp pearl along the axis direction of wire is arranged in order to set for the distance interval, the lamp pearl all includes at least one SMD LED light emitting component and cladding at least one SMD LED light emitting component's the encapsulation colloid on the surface, at least one SMD LED light emitting component's positive pole and negative pole respectively with at least one first conductor layer and at least one second conductor layer electric connection.

2. The single wire LED light string of claim 1, wherein at least one of the first conductor layers and at least one of the second conductor layers are arranged in a direction perpendicular to the axis of the wire.

3. The LED lamp string with single lead according to claim 2, wherein at least one of the SMD LED light emitting elements of the lamp bead is located on one side of the composite lead core or on two opposite sides of the composite lead core, and the directions of the positive pole and the negative pole of the SMD LED light emitting elements located on the same side are the same or opposite.

4. The single wire LED light string of claim 1, wherein at least one of the first conductor layers and at least one of the second conductor layers are arranged along a circumferential direction centered on a central axis of the wire.

5. The LED lamp string with single lead according to claim 4, wherein the lamp bead comprises more than two patch type LED light emitting elements, and the more than two patch type LED light emitting elements are arranged along a circumferential direction with a central axis of the lead as a center.

6. The single wire LED light string of claim 1, wherein at least one of the first conductor layers and at least one of the second conductor layers are coaxially arranged in an order from inside to outside from a central axis of the wire.

7. The LED lamp string with single lead wire according to claim 6, wherein the composite lead wire core on one side or both sides of the central axis of the lead wire corresponding to the position of the bead is cut along the axial direction of the lead wire to expose the first conductor layer and the second conductor layer to form a first welding portion and a second welding portion, and the positive electrode and the negative electrode of the patch type LED luminous element are electrically connected with the first welding portion and the second welding portion respectively.

8. The single wire LED light string of claims 1-7, wherein the composite wire core has a cross-section that is circular, elliptical, or polygonal.

9. The single-wire LED light string according to any one of claims 1-7, wherein a surface of the patch LED lighting element facing the composite wire core is provided with a groove matching the shape of the surface of the composite wire core.

10. The LED lamp string with single lead according to any one of claims 1 to 7, wherein the first conductor layer and the second conductor layer are made of Cu, Al, Ag or their alloys, and the insulating layer is made of non-metal or metal oxide.

11. The single wire LED light string of claims 1-7, wherein the wire further comprises an insulating sheath covering part or all of the surface of the composite wire core.

12. The single wire LED light string of claim 11, wherein the insulating sheath is made of insulating paint or insulating plastic.

13. The single wire LED light string of claims 1-7, wherein the surface mount LED luminary is an LED, an ICLED or an HVLED.

14. The LED lamp string with a single wire according to any one of claims 1 to 7, further comprising a plurality of partially or completely transparent or semitransparent decorative pieces, wherein the plurality of decorative pieces are respectively coated outside the plurality of lamp beads.

15. A lighting device, comprising a single-wire LED light string as claimed in any one of claims 1 to 14 and a control box, wherein a positive output terminal and a negative output terminal of the control box are electrically connected to the first conductor layer and the second conductor layer of the LED light string, respectively.

16. The lighting device according to claim 15, wherein the control box comprises a connection circuit board, the connection circuit board is provided with at least one first connection line, at least one second connection line and a via hole, an inner wall of the via hole is provided with at least one first conductive portion electrically connected to at least one first connection line and at least one second conductive portion electrically connected to at least one second connection line, one end of the wire of the LED light string is inserted into the via hole, and at least one first conductive layer and at least one second conductive layer of the wire are welded to at least one first conductive portion and at least one second conductive portion, respectively.