LED lamp bead and LED lamp module

Abstract

Provided in the present disclosure are an LED lamp bead and an LED lamp module. The LED lamp bead comprises a light-emitting body and a lamp bead holder. The lamp bead holder comprises a light-emitting-body fixing structure and a driving circuit, wherein the light-emitting-body fixing structure is configured to fix the light-emitting body, and the driving circuit is connected to the light-emitting body and is configured to drive, in response to a lamp bead trigger signal, the light-emitting body to emit light. The driving circuit comprises a power supply interface and an IC chip, wherein the power supply interface, the light-emitting body and the IC chip are sequentially connected, such that power supply currents input from the power supply interface flow through the light-emitting body to the IC chip; and the IC chip is configured to receive the lamp bead trigger signal and transmit the lamp bead trigger signal to the light-emitting body, so as to drive the light-emitting body to emit light. The power supply interface, the light-emitting body and the IC chip are sequentially connected, such that the power supply currents input from the power supply interface flow through the light-emitting body to the IC chip; correspondingly, the LED lamp bead works in a common-cathode driving mode, such that a forward voltage drop is reduced, and internal conduction resistance is also reduced, thereby ensuring the usage safety of the lamp bead.

Description

LED lamp beads and LED lamp sets

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 2023220520376, entitled “LED Lamp Beads and LED Lamp Groups,” filed with the Chinese Patent Office on August 1, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the technical field of LED lamp beads, and in particular to an LED lamp bead and an LED lamp assembly. Background Art

[0004] The RGB color model is a color standard in the industry. It obtains various colors by changing the three color channels of red (R), green (G), and blue (B) and superimposing them on each other. RGB represents the colors of the three channels of red, green, and blue. This standard covers almost all colors that can be perceived by human vision and is one of the most widely used color systems.

[0005] At present, decorative light strings are mainly used for decoration, but the cost and safety of decorative light strings in the existing technology are insufficient, resulting in insufficient market competitiveness of the products.

[0006] Public content

[0007] In view of this, the purpose of the present disclosure is to provide an LED lamp bead and an LED lamp group, which can ensure the safety of the lamp bead.

[0008] In the first aspect, an embodiment of the present disclosure provides an LED lamp bead, which includes a light-emitting body and a lamp bead holder; the lamp bead holder includes a light-emitting body fixing structure and a driving circuit; the light-emitting body fixing structure is configured to fix the light-emitting body, and the driving circuit is connected to the light-emitting body and is configured to respond to the lamp bead trigger signal to drive the light-emitting body to emit light; wherein the driving circuit includes a power supply interface and an IC chip, and the power supply interface, the light-emitting body, and the IC chip are connected in sequence so that the power supply current input by the power supply interface flows from the light-emitting body to the IC chip; the IC chip is configured to receive the lamp bead trigger signal and output the lamp bead trigger signal to the light-emitting body to drive the light-emitting body to emit light.

[0009] In combination with the first aspect, the embodiment of the present disclosure provides a first possible implementation method of the first aspect, wherein the power supply interface includes a positive electrode interface and a negative electrode interface; the IC chip is configured with an IC positive electrode and an IC negative electrode; the positive electrode interface, the IC positive electrode, the light-emitting body, the IC negative electrode, and the negative electrode interface are connected in sequence so that the power supply current first flows through the light-emitting body and then flows through the IC negative electrode to form a common cathode drive circuit.

[0010] In combination with the first aspect, the embodiment of the present disclosure provides a second possible implementation of the first aspect, wherein the LED lamp bead is configured with a soldering pad, the driving circuit is arranged on the soldering pad, the bottom end of the soldering pad is configured to connect to the light-emitting body fixing structure, and the light-emitting body is installed on the surface of the soldering pad; a positive wiring area and a negative wiring area are provided on the soldering pad, the positive wiring area is configured to connect to the positive interface of the power supply interface, and the negative wiring area is configured to connect to the negative interface of the power supply interface; wherein the light-emitting body includes a positive pin and a negative pin, a positive solder point corresponding to the positive pole of the IC is provided on the positive wiring area, and a negative solder point corresponding to the positive pole of the IC is provided on the negative wiring area. The positive electrode pin of the IC is connected to the positive electrode interface of the power supply interface through the positive electrode welding point, and the negative electrode of the IC is connected to the negative electrode interface of the power supply interface through the negative electrode welding point; the IC chip is arranged on the positive electrode wiring area, the positive electrode of the IC is connected to the positive electrode interface of the power supply interface through the positive electrode welding point, and the negative electrode of the IC is connected to the negative electrode interface of the power supply interface through the negative electrode welding point; the IC chip also includes a light-emitting body communication contact, and the light-emitting body communication contact is configured to be connected to the positive electrode pin of the light-emitting body; the light-emitting body is arranged on the negative electrode wiring area, and the negative electrode pin of the light-emitting body is connected to the negative electrode interface of the power supply interface through the connecting welding point; the power supply current flows through the positive electrode of the IC, the positive electrode pin of the light-emitting body, the negative electrode pin of the light-emitting body and the negative electrode of the IC in sequence.

[0011] In combination with the first aspect, the embodiment of the present disclosure provides a third possible implementation of the first aspect, wherein the driving circuit also includes a signal interface, a signal wiring area is also provided on the pad, and the signal interface is provided in the signal wiring area; the IC chip also includes a signal contact, and the IC chip is connected to the signal wiring area through the signal contact to respond to the lamp bead trigger signal, and transmits the lamp bead trigger signal to the light-emitting body through the light-emitting body communication contact to drive the light-emitting body to emit light.

[0012] In combination with the first aspect, the embodiment of the present disclosure provides a fourth possible implementation of the first aspect, wherein the solder pad also includes an outer frame, the positive wiring area and the negative wiring area are arranged on the inner side of the outer frame, and the positive wiring area is arranged up and down relative to the negative wiring area; the signal wiring area is arranged at the side end position of the positive wiring area and the negative wiring area.

[0013] In combination with the first aspect, the embodiment of the present disclosure provides a fifth possible implementation of the first aspect, wherein the signal interface includes a signal input interface, or the signal interface also includes a signal output interface; when the signal interface includes a signal input interface, the signal wiring area is set on one side of the positive wiring area and the negative wiring area; when the signal interface includes a signal input interface and a signal output interface, the signal wiring areas corresponding to the signal input interface and the signal output interface are respectively set on the left and right sides of the positive wiring area and the negative wiring area.

[0014] In combination with the first aspect, the embodiment of the present disclosure provides a sixth possible implementation of the first aspect, wherein the welding pad also includes a support rod, which is connected to the outer frame and is laterally arranged corresponding to the positions of the positive wiring area and the negative wiring area, and is configured to separate the positive wiring area and the negative wiring area.

[0015] In combination with the first aspect, the embodiment of the present disclosure provides a seventh possible implementation of the first aspect, wherein the driving circuit is also connected to a surge tube, one end of the surge tube is connected to the positive electrode interface, and the other end of the surge tube is connected to the negative electrode interface.

[0016] In combination with the first aspect, the embodiment of the present disclosure provides an eighth possible implementation of the first aspect, wherein the light-emitting body fixing structure includes a plug-in structure or a patch structure.

[0017] In a second aspect, the embodiments of the present disclosure further provide an LED lamp group, which is configured with a plurality of the above-mentioned LED lamp beads.

[0018] The embodiments of the present disclosure bring the following beneficial effects: the LED lamp beads and LED lamp groups provided by the present disclosure connect the power supply interface, the light-emitting body, and the IC chip in sequence, so that the power supply current input by the power supply interface flows from the light-emitting body to the IC chip, and correspondingly, the LED lamp beads operate in a common cathode drive mode, so that the forward voltage drop becomes smaller and the on-state internal resistance also becomes smaller, which can ensure the safe use of the lamp beads.

[0019] Other features and advantages of the present disclosure will be described in the following description, and in part will become apparent from the description, or understood by practicing the present disclosure. The objectives and other advantages of the present disclosure are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0020] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the specific embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] FIG1 is a schematic diagram of the structure of an LED lamp bead provided in an embodiment of the present disclosure;

[0023] FIG2 is a schematic diagram of the structure of an LED lamp bead provided in an embodiment of the present disclosure;

[0024] FIG3 is a schematic diagram of the structure of an LED lamp bead when the light-emitting body fixing structure provided by an embodiment of the present disclosure is a plug-in structure;

[0025] FIG4 is a schematic diagram of the structure of an LED lamp bead provided in an embodiment of the present disclosure.

[0026] In the figure: 10-light-emitting body; 11-lamp bead cover; 20-lamp bead bracket; 21-light-emitting body fixing structure; 22-driving circuit; 221-IC chip; 222-power supply interface; 30-soldering pad; 31-positive wiring area; 32-negative wiring area; 33a-signal wiring area corresponding to the signal input interface; 33b-signal wiring area corresponding to the signal output interface; 34-outer frame; 35-support rod; 41-IC positive pole; 42-IC negative pole; 43-signal input interface; 44-signal output interface; 45-light-emitting body communication contact; 50-surge tube. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of them. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0028] The RGB color model is a color standard in the industry. It obtains various colors by changing the three color channels of red (R), green (G), and blue (B) and superimposing them on each other. RGB represents the colors of the three channels of red, green, and blue. This standard covers almost all colors that can be perceived by human vision and is one of the most widely used color systems.

[0029] At present, decorative light strings are mainly used for decoration, but the cost and safety of decorative light strings in the existing technology are insufficient, resulting in insufficient market competitiveness of the products.

[0030] Based on this, the LED lamp beads and LED lamp groups provided by the embodiments of the present disclosure can ensure the safe use of the lamp beads.

[0031] To facilitate understanding of this embodiment, an LED lamp bead disclosed in the embodiment of the present disclosure is first introduced in detail. Figure 1 shows a structural schematic diagram of the LED lamp bead provided in the embodiment of the present disclosure. As shown in Figure 1, the LED lamp bead includes a light-emitting body 10 and a lamp bead bracket 20; the lamp bead bracket 20 includes a light-emitting body fixing structure 21 and a driving circuit 22; the driving circuit 22 is connected to the light-emitting body 10 and is configured to respond to the lamp bead trigger signal to drive the light-emitting body 10 to emit light.

[0032] Optionally, each LED lamp bead includes a drive circuit 22. After receiving a lamp bead trigger signal, the drive circuit 22 drives the light-emitting element 10 to emit light according to the lamp bead trigger signal. The light-emitting element fixing structure 21 is configured to fix the light-emitting element 10, and the drive circuit 22 is fixed to the light-emitting element fixing structure 21. At this time, the three are connected. The light-emitting element fixing structure 21, i.e., the LED lamp bead, is configured to connect the signal line and the power line. The light-emitting element 10 can be illuminated through the light-emitting element fixing structure 21 and the drive circuit 22.

[0033] In some possible implementations, the drive circuit 22 includes a power supply interface 222 and an IC chip 221. The power supply interface 222, the light-emitting element 10, and the IC chip 221 are connected in sequence so that the power supply current input by the power supply interface 222 flows from the light-emitting element 10 to the IC chip 221. The IC chip 221 is configured to receive a lamp bead trigger signal and transmit the lamp bead trigger signal to the light-emitting element 10 to drive the light-emitting element 10 to emit light. Based on the above connection method, the power supply current input by the power supply interface 222 first passes through the light-emitting element 10 and then to the IC chip 221, which can reduce the forward voltage drop and the on-state internal resistance, thereby causing the LED lamp bead to operate in a common cathode drive mode.

[0034] An LED lamp bead provided by an embodiment of the present disclosure connects a power supply interface, a light-emitting body, and an IC chip in sequence, so that the power supply current input by the power supply interface flows from the light-emitting body to the IC chip. Correspondingly, the LED lamp bead operates in a common cathode drive mode, so that the forward voltage drop is reduced and the on-state internal resistance is also reduced, thereby ensuring the safe use of the lamp bead.

[0035] For ease of understanding, based on the above disclosed embodiment, the present disclosure also provides another LED lamp bead. FIG2 shows a schematic structural diagram of the LED lamp bead provided in the present disclosure embodiment. As shown in FIG2 , the power supply interface 222 of the LED lamp bead includes a positive electrode interface and a negative electrode interface. Correspondingly, the IC chip 221 is configured with an IC positive electrode 41 and an IC negative electrode 42. The positive electrode interface, the IC positive electrode 41, the light-emitting body 10, the IC negative electrode 42, and the negative electrode interface are connected in sequence so that the power supply current first flows through the light-emitting body 10 and then flows through the IC negative electrode 42, forming a common cathode drive circuit 22.

[0036] Optionally, the LED lamp bead is provided with a soldering pad 30, the driving circuit 22 is provided on the soldering pad 30, the bottom end of the soldering pad 30 is configured to connect to the light-emitting body fixing structure 21, the light-emitting body 10 is mounted on the surface of the soldering pad 30, and the LED lamp bead is installed in an LED lamp group including multiple LED lamp beads through the soldering pad 30 structure. In addition, a positive wiring area 31 and a negative wiring area 32 are provided on the soldering pad 30, the positive wiring area 31 is configured to connect to the positive interface of the power supply interface 222, and the negative wiring area 32 is configured to connect to the negative interface of the power supply interface 222. The light-emitting body 10 includes a positive pin and a negative pin, and a positive solder point corresponding to the positive electrode 41 of the IC is provided on the positive wiring area 31, and a connection solder point corresponding to the negative pin and a negative solder point corresponding to the negative electrode 42 of the IC are provided on the negative wiring area 32.

[0037] 2 , the IC chip 221 is arranged on the positive wiring area 31, and the IC positive electrode 41 is connected to the positive interface of the power supply interface via the positive welding point, and the IC negative electrode 42 is connected to the negative interface of the power supply interface 222 via the negative welding point. Referring to FIG2 , FIG2 is a package structure of the drive circuit 22, in which the upper and lower areas are the negative wiring area 32 and the positive wiring area 31, respectively. The IC chip 221 is arranged on the positive wiring area 31, and the contact connected to the positive wiring area 31 is the IC positive electrode 41; correspondingly, the contact connected to the negative wiring area 32 is the IC negative electrode 42. In addition, the IC chip 221 also includes a light-emitting body communication contact 45, which is configured to be connected to the positive pin of the light-emitting body 10.

[0038] In some possible implementations, the light-emitting body 10 includes R, G, and B light-emitting bodies, which respectively indicate red light-emitting bodies, green light-emitting bodies, and blue light-emitting bodies. Each light-emitting body 10 includes a positive pin and a negative pin. The negative pin of the light-emitting body 10 is connected to the negative terminal of the power supply interface through the negative wiring area 32 via a connecting solder joint. In Figure 2, the negative pins of the green light-emitting body and the blue light-emitting body are located in the upper position, and the positive pins of each are located in the lower position. The positive pin of the red light-emitting body faces upward and the negative pin faces downward, that is, the negative pin of the red light-emitting body is connected to the pad 30. Among them, 10a, 10b, and 10c in Figure 2 respectively represent the negative pin of the above-mentioned red light-emitting body, the negative pin of the green light-emitting body, and the negative pin of the blue light-emitting body. Correspondingly, the red light-emitting body used in the present disclosure is a positive polarity red light chip with lower cost. At the same time, the positive pin of each light-emitting body 10 is connected to the light-emitting body communication contact 45. When the power is connected, the supply current flows through the IC positive electrode 41, the positive pin of the light emitting body 10, the negative pin of the light emitting body 10 and the IC negative electrode 42 in sequence, thereby achieving common cathode drive. In addition, the light emitting body 10 is arranged on the negative connection area 32.

[0039] The driving circuit 22 also includes a signal interface. The pad 30 is also provided with a signal wiring area. The signal interface is provided in the signal wiring area. Correspondingly, the IC chip 221 also includes signal contacts. The IC chip 221 is connected to the signal wiring area via the signal contacts to respond to the lamp bead trigger signal and transmit the lamp bead trigger signal to the light-emitting element 10 via the light-emitting element communication contact 45 to drive the light-emitting element 10 to emit light.

[0040] 2 , the pad 30 includes an outer frame 34, and the positive wiring area 31 and the negative wiring area 32 are arranged on the inner side of the outer frame 34, and the positive wiring area 31 is arranged up and down relative to the negative wiring area 32. Among them, the signal wiring area is arranged at the side end position of the positive wiring area 31 and the negative wiring area 32. Optionally, the signal interface includes a signal input interface 43, or the signal interface also includes a signal output interface 44. When the signal interface includes the signal input interface 43, the signal wiring area is arranged on one side of the positive wiring area 31 and the negative wiring area 32, such as the left side or the right side, and is arranged in a specific wiring manner. When the signal interface includes the signal input interface 43 and the signal output interface 44, the signal wiring areas corresponding to the signal input interface 43 and the signal output interface 44 are respectively arranged on the left and right sides of the positive wiring area 31 and the negative wiring area 32.

[0041] Among them, Figure 2 shows that the signal interface includes a signal input interface 43 and a signal output interface 44, and 33a represents the signal wiring area corresponding to the signal input interface, and 33b represents the signal wiring area corresponding to the signal output interface. Figure 4 shows a structural schematic diagram of the LED lamp bead provided by an embodiment of the present disclosure, which only includes the signal wiring area corresponding to the signal input interface, wherein the IC chip is arranged on the negative wiring area 32, and the light-emitting body is arranged on the positive wiring area 31. Optionally, the position of the IC chip and the position of the light-emitting body can be set according to requirements. In addition, the above-mentioned light-emitting body 10 can also include other light-emitting bodies, and it is only necessary to connect the positive pin of the light-emitting body to the light-emitting body communication contact 45.

[0042] Optionally, the light-emitting body fixing structure 21 includes a plug-in structure or a patch structure. When the light-emitting body fixing structure 21 is a plug-in structure, as shown in FIG3 , the schematic diagram of the LED lamp bead structure when the light-emitting body fixing structure 21 is a plug-in structure, based on FIG2 , the signal input interface 43 and the signal output interface 44 are shown. Correspondingly, the plug-in structure includes four pins, which are arranged in sequence up, down, left, and right. In FIG3 , the left and right pins correspond to the signal wiring areas corresponding to the signal input interface 43 and the signal output interface 44, respectively. There are two pins in the middle position, and the front pin is blocked, which is the pin corresponding to the negative wiring area 32. Correspondingly, the middle pin shown in FIG3 is the pin corresponding to the positive wiring area 31. When the light-emitting body fixing structure 21 is a patch structure, reference may be made to FIG2 .

[0043] Optionally, the pad 30 further includes a support rod 35 connected to the outer frame 34 and disposed transversely to the positive electrode connection area 31 and the negative electrode connection area 32, thereby separating the positive electrode connection area 31 from the negative electrode connection area 32. Furthermore, the support rod 35 can enhance the structural stability of the pad 30 and the outer frame 34.

[0044] Optionally, the drive circuit 22 is further connected to a surge tube 50, one end of which is connected to the positive terminal, and the other end of which is connected to the negative terminal. In FIG2 , the surge tube 50 is illustrated as being disposed in the positive wiring area 31. Correspondingly, the surge tube 50 is connected to the negative wiring area 32 via a welding wire. The surge tube 50 can protect the light-emitting element 10 from being burned by surges generated by the power supply.

[0045] In addition, the LED lamp bead further includes a lamp bead cover 11 , which is mounted on the light-emitting body fixing structure 21 and configured to form a lampshade structure of the light-emitting body 10 .

[0046] Another LED lamp bead provided by the present disclosure has a red light emitting body that is a positive polarity red light chip with a low cost. In addition, the power supply, IC chip and light emitting body are connected to form a common cathode drive, so that the forward voltage drop is reduced and the internal resistance of the conduction is also reduced, ensuring the safety of the lamp bead. Optionally, a surge tube is also connected, which can protect the light emitting body from being burned by the surge generated by the power supply, further ensuring the safety of the lamp bead.

[0047] On the basis of the above-mentioned embodiments, the embodiments of the present disclosure further provide an LED lamp group, which is configured with a plurality of LED lamp beads shown in any one of Figures 1 to 4. The LED lamp group can determine the lighting mode of each LED lamp bead according to preset usage requirements. In some possible implementations, when the signal interface of the LED lamp bead includes a signal input interface, the LED lamp beads are connected in parallel, and each LED lamp bead can be lit only by receiving a lamp bead trigger signal through the signal input interface; when the signal interface includes a signal input interface and a signal output interface, the LED lamp beads can be connected in series, and the LED lamp bead is lit when the lamp bead trigger signal passes through the signal input interface and the signal output interface.

[0048] The LED lamp assembly provided in the embodiments of the present disclosure has the same technical features as the LED lamp beads provided in the above embodiments, and therefore can solve the same technical problems and achieve the same technical effects. Those skilled in the art will clearly understand that for the sake of convenience and brevity, the specific structure of the LED lamp assembly described above can refer to the corresponding structure in the above LED lamp bead embodiments, and will not be repeated here.

[0049] In addition, in the description of the embodiments of the present disclosure, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present disclosure based on the specific circumstances.

[0050] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this disclosure and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] Finally, it should be noted that the above embodiments are only specific implementation methods of the present disclosure, which are used to illustrate the technical solutions of the present disclosure, rather than to limit them. The scope of protection of the present disclosure is not limited thereto. Although the present disclosure has been described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above embodiments within the technical scope disclosed in the present disclosure, or replace some of the technical features therein with equivalents. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims. Industrial Applicability

[0052] By adopting the above solution, the power supply interface, the light-emitting body, and the IC chip are connected in sequence, so that the power supply current input by the power supply interface flows from the light-emitting body to the IC chip. Correspondingly, the LED lamp beads work in a common cathode drive mode, which reduces the forward voltage drop and the on-state internal resistance, thereby ensuring the safety of the lamp beads.

Claims

1. An LED lamp bead, characterized in that: The LED lamp bead comprises a light-emitting body and a lamp bead bracket; the lamp bead bracket comprises a light-emitting body fixing structure and a driving circuit; the light-emitting body fixing structure is configured to fix the light-emitting body, and the driving circuit is connected to the light-emitting body and configured to respond to the lamp bead trigger signal to drive the light-emitting body to emit light; The driving circuit includes a power supply interface and an IC chip, and the power supply interface, the light-emitting body, and the IC chip are connected in sequence so that the power supply current input by the power supply interface flows from the light-emitting body to the IC chip; The IC chip is configured to receive the lamp bead trigger signal and output the lamp bead trigger signal to the light-emitting body to drive the light-emitting body to emit light.

2. The LED lamp bead according to claim 1, characterized in that: The power supply interface includes a positive electrode interface and a negative electrode interface; the IC chip is configured with an IC positive electrode and an IC negative electrode; The positive electrode interface, the IC positive electrode, the light-emitting body, the IC negative electrode, and the negative electrode interface are connected in sequence so that the power supply current first flows through the light-emitting body and then flows through the IC negative electrode to form a common cathode drive circuit.

3. The LED lamp bead according to claim 2, characterized in that: The LED lamp bead is provided with a solder pad, the driving circuit is arranged on the solder pad, the bottom end of the solder pad is configured to be connected to the light-emitting body fixing structure, and the light-emitting body is mounted on the surface of the solder pad; The pad is provided with a positive wiring area and a negative wiring area, the positive wiring area is configured to be connected to the positive interface of the power supply interface, and the negative wiring area is configured to be connected to the negative interface of the power supply interface; Wherein, the light-emitting body includes a positive pin and a negative pin, a positive electrode welding point corresponding to the positive electrode of the IC is arranged on the positive electrode wiring area, and a connection welding point corresponding to the negative electrode pin and a negative electrode welding point corresponding to the negative electrode of the IC are arranged on the negative electrode wiring area; The IC chip is arranged on the positive electrode wiring area, the positive electrode of the IC is connected to the positive electrode interface of the power supply interface through the positive electrode welding point, and the negative electrode of the IC is connected to the negative electrode interface of the power supply interface through the negative electrode welding point; the IC chip also includes a light-emitting body communication contact, and the light-emitting body communication contact is configured to be connected to the positive electrode pin of the light-emitting body; The light-emitting body is arranged on the negative electrode wiring area, and the negative electrode pin of the light-emitting body is connected to the negative electrode interface of the power supply interface through the connecting welding point; The power supply current flows through the positive electrode of the IC, the positive electrode pin of the light-emitting body, the negative electrode pin of the light-emitting body and the negative electrode of the IC in sequence.

4. The LED lamp bead according to claim 3, characterized in that: The driving circuit further comprises a signal interface, a signal wiring area is further provided on the pad, and the signal interface is provided in the signal wiring area; The IC chip also includes a signal contact, and the IC chip is connected to the signal wiring area through the signal contact to respond to the lamp bead trigger signal and transmit the lamp bead trigger signal to the light source through the light source communication contact. The light-emitting body is driven to emit light.

5. The LED lamp bead according to claim 4, characterized in that: The soldering pad also includes an outer frame, the positive wiring area and the negative wiring area are arranged on the inner side of the outer frame, and the positive wiring area is arranged up and down relative to the negative wiring area; the signal wiring area is arranged at the side end positions of the positive wiring area and the negative wiring area.

6. The LED lamp bead according to claim 4 or 5, characterized in that: The signal interface includes a signal input interface, or the signal interface also includes a signal output interface; When the signal interface includes the signal input interface, the signal wiring area is arranged on one side of the positive wiring area and the negative wiring area; When the signal interface includes the signal input interface and the signal output interface, the signal wiring areas corresponding to the signal input interface and the signal output interface are respectively arranged on the left and right sides of the positive wiring area and the negative wiring area.

7. The LED lamp bead according to claim 5 or 6, characterized in that: The pad further includes a support rod connected to the outer frame, arranged transversely corresponding to the positions of the positive electrode wiring area and the negative electrode wiring area, and configured to separate the positive electrode wiring area and the negative electrode wiring area.

8. The LED lamp bead according to any one of claims 2 to 7, characterized in that: The driving circuit is also connected to a surge tube, one end of the surge tube is connected to the positive electrode interface, and the other end of the surge tube is connected to the negative electrode interface.

9. The LED lamp bead according to any one of claims 1 to 8, characterized in that: The light-emitting body fixing structure includes a plug-in structure or a patch structure.

10. An LED lamp assembly, characterized in that: The LED lamp group is configured with a plurality of LED lamp beads according to any one of claims 1-9.

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