CN201251045Y - Light-emitting diode lamp and synchronous light-emitting diode lamp string - Google Patents

Abstract

The utility model relates to a light emitting diode lamp and synchronous light emitting diode lamp cluster, this synchronous light emitting diode lamp cluster contains a plurality of light emitting diode lamps and a power converter, this power converter provides the required direct current voltage of these light emitting diode lamps, and this light emitting diode lamp contains at least one light emitting diode and is used for controlling the control circuit who discolours, this light emitting diode lamp has an anode pin, a cathode pin, a data input pin and a data output pin, this control circuit of this data input pin and data output pin electrical connection and this control circuit are luminous according to this light emitting diode of data control on this data input pin. The independent LED lamp sets can obtain fixed frequency by referring to a synchronous signal or a reference signal together to control the color change or the flicker of the LEDs, and the lamp string consisting of the LED lamp sets can also control the color change and the flicker form on the basis of synchronization so as to obtain diversified design effects.

Description

LED lights and synchronous LED light strings

technical field

The utility model relates to a light-emitting device, in particular to an RGB light-emitting diode lamp group and a synchronous light-emitting diode lamp string with synchronous signals.

Background technique

The application of light strings has always been very wide, such as Christmas light strings, landscape light strings, building light strings, etc. With the progress of light-emitting diode (LED) manufacturing technology and the price getting cheaper, it is also a good idea to apply LEDs to light strings. This is a new trend, but because LEDs are basically suitable for DC power supply, and light strings are used in the environment of AC power supply, how to apply LEDs to light strings, some products have been seen in the market. But how to achieve synchronous change is an obstacle to be overcome. The utility model has done an in-depth research on this subject, and has obtained concrete results, so a patent application is proposed.

The current LED light strings have the prior art shown in FIG. 1 , FIG. 2 and FIG. 3 , wherein each light-emitting module represents a group of RGB three-color LED light groups 2 . According to the existing technology, the technology shown in Fig. 1 is the most unsatisfactory, because all the LED lamp groups 2 are connected in parallel due to the DC parallel connection, so the current consumption is large, that is to say, the power converter 1 must be able to supply a large current , it is very difficult to handle or the cost is high, or the LED lamp groups 2 that can be connected in parallel are limited.

The technology shown in FIG. 2 is better than the technology shown in FIG. 1. Because the LED lamps 2 are connected in series, the current is small, so the power converter 1 is easy to handle and low in cost. However, this technology still has a defect, that is, the LED light sets 2 that can be connected in series have its limitations, depending on the DC voltage supplied by the power converter 1 , the higher the DC voltage, the more LED light sets 2 can be connected in series.

The technique shown in FIG. 3 is the best practice among the three, and the power converter 1 shown in FIG. 2 is replaced by each small power converter 1 . Because the structure of the small power converter 1 is relatively simple, and the light sets 2 that can be connected in series are relatively unlimited, the only small disadvantage is that one LED light set 2 is equipped with a small power converter 1, so the product cost is relatively high .

In the prior art shown in Fig. 1, Fig. 2 and Fig. 3, the known LED lamp group 2 used comprises a red light-emitting diode (R LED), a green light-emitting diode (G LED), a blue light-emitting diode ( BLED) and a control circuit, as shown in Figure 4. The two pins of the known LED lamp group 2 are respectively connected to the positive and negative terminals of the DC power supply. The control circuit can be implemented as an integrated circuit (IC), which drives the three primary colors RGB LED or LED according to the program set in the original circuit. For color mixing. However, the disadvantage of the known LED light sets 2 is that they are respectively implanted with independent control ICs, so when applied to light strings, the color change of each LED light set 2 operates independently after the power is turned on, and synchronization cannot be achieved. If each LED light group can be synchronized, the effect that the light string can express must be quite different from the effect that can only be shown independently like a starry sky. Therefore, how to take into account the cost and achieve the synchronous effect is the research direction of the industry.

Contents of the invention

The purpose of the utility model is to provide a light-emitting diode lamp with synchronous signal, especially a RGB light-emitting diode lamp group.

The purpose of this utility model is to provide a synchronous LED lamp string, which includes a plurality of LED lamps, and the LED lamps change color with reference to a synchronous signal, wherein the LEDs can be RGB LED lamp groups.

The light-emitting diode lamp provided by the utility model includes at least one light-emitting diode and a control circuit. signal, and the aforementioned control circuit controls the aforementioned LED to emit light based on the synchronous signal.

The RGB light-emitting diode lamp set provided by the utility model includes a red light-emitting diode, a green light-emitting diode, a blue light-emitting diode and a control circuit, and is characterized in that: the aforementioned RGB light-emitting diode light set has a synchronous pin, the The synchronization pin receives a synchronization signal, and the control circuit controls the red LED, the green LED and the blue LED to change colors based on the synchronization signal.

A synchronous LED lamp string provided by the utility model includes: a plurality of LED lamps and a power converter, the power converter provides the DC voltage required by the LED lamps, and the LED lamps include At least one light-emitting diode and a control circuit for controlling discoloration are characterized in that the aforementioned light-emitting diode lamp has an anode pin, a cathode pin and a synchronous pin, and the synchronous pins of each light-emitting diode lamp receive a The reference signal, and the aforementioned control circuit controls the light-emitting diode to change color based on the reference signal.

Wherein the LED lamp is an RGB LED lamp group, the RGB LED lamp group includes a red LED, a green LED, a blue LED and the aforementioned control circuit, the control circuit controls the aforementioned red light emission based on the reference signal The diodes, the aforementioned green light-emitting diodes and the aforementioned blue light-emitting diodes are discolored.

Another synchronous light emitting diode string provided by the utility model includes: a plurality of light emitting diode lamps and a plurality of power converters, one power converter respectively provides a DC voltage required by a light emitting diode lamp, and the aforementioned light emitting diode lamps It includes at least one light emitting diode and a control circuit for controlling discoloration, and is characterized in that: the aforementioned light emitting diode lamp group has an anode pin, a cathode pin and a synchronous pin, and each power converter provides a reference signal to The synchronous pin of the aforementioned light-emitting diode lamp, and the aforementioned control circuit controls color change based on the reference signal.

Wherein the LED lamp is an RGB LED lamp group, the RGB LED lamp group includes a red LED, a green LED, a blue LED and the aforementioned control circuit, the control circuit controls the aforementioned red light emission based on the reference signal The diodes, the aforementioned green light-emitting diodes and the aforementioned blue light-emitting diodes are discolored.

According to the LED lights with synchronous pins and the synchronous LED light string implemented in the utility model, the independent LED light groups can jointly refer to a synchronous signal or a reference signal to obtain a fixed frequency, and then control the color change of the LEDs or flickering, and the light string composed of these LED light groups can also control the color change and flickering form on the basis of synchronization, so as to obtain various design effects.

Description of drawings

FIG. 1 is a circuit block diagram of the first LED light string in the prior art.

Fig. 2 is a circuit block diagram of a second prior art LED light string.

FIG. 3 is a circuit block diagram of a third LED light string in the prior art.

Fig. 4 is a circuit block diagram of a known LED lamp group.

Fig. 5 is a circuit block diagram of the light-emitting diode lamp group of the present invention.

Fig. 6 is a circuit block diagram of the first embodiment of the synchronous LED light string of the present invention.

Fig. 7 is another circuit block diagram of the first embodiment of the synchronous LED light string of the present invention.

FIG. 8 is a driving circuit diagram of the synchronous pins of each LED light group in the synchronous LED light string of the present invention.

9A and 9B are circuit block diagrams of the second embodiment of the synchronous LED light string of the present invention.

FIG. 10 is a circuit block diagram of a third embodiment of the synchronous LED light string of the present invention, which includes multiple power converters.

FIG. 11 is another circuit block diagram of the third embodiment of the synchronous LED light string of the present invention, which includes multiple power converters.

Fig. 12 is another circuit block diagram of the synchronous LED light string of the utility model.

FIG. 13A is another circuit block diagram of the LED lamp of the present invention.

FIG. 13B is a representative diagram of the block diagram of the circuit shown in FIG. 13A.

FIG. 14 is a circuit block diagram of the control circuit shown in FIG. 13A.

15A and 15B are circuit block diagrams of the synchronous LED lamp string of the present invention, including the LED lamp shown in FIG. 13A .

FIG. 16A and FIG. 16B are respectively schematic diagrams of examples of data transmission in the present invention.

Figure number:

1---Power converter

2---LED light group

10---RGB light-emitting diode lamp group or light-emitting diode lamp

11---Red LED

12---Green LED

13---Blue LED

14---control circuit

15---Output buffer

16---Input buffer

17---Main LED lights

18---Secondary LED

20---Power converter

Detailed ways

Although the utility model will be fully described with reference to the accompanying drawings that contain preferred embodiments of the utility model, it should be understood that those skilled in the art can modify the utility model described herein while obtaining the utility model. effect. Therefore, it should be understood that the above description is a broad disclosure for those skilled in the art, and its content is not intended to limit the present invention.

Please refer to FIG. 5 , which is a circuit block diagram showing the LED lamp group of the present invention. The utility model provides an RGB light emitting diode lamp 10, comprising a red light emitting diode (R LED) 11, a green light emitting diode (G LED) 12, a blue light emitting diode (B LED) 13 and a control circuit 14, the The control circuit can be implemented by an integrated circuit, and the control circuit 14 has been programmed to drive the color change sequence or flashing form of the RLED 11, G LED 12 and B LED 13.

According to a preferred embodiment, the RGB light-emitting diode lamp 10 of the present invention has three pins, namely an anode pin, a cathode pin and a synchronization pin, wherein the anode pin and the cathode pin receive a DC voltage, The DC voltage is the working voltage of the LED lamp 10 , and the synchronization pin is connected to the control circuit 14 . According to the following different embodiments, the control circuit 14 of the RGB LED lamp 10 of the present invention outputs a reference signal (or synchronization signal) with a fixed frequency at the synchronization pin, or receives a reference signal (or synchronization signal) at the synchronization pin synchronous signal), and the control circuit controls the color change of R LED 11, G LED 12 and B LED 13 based on the reference signal (or synchronous signal).

According to a preferred embodiment of the present invention, the synchronous pin can also be implemented in a monochrome LED lamp (not shown), the monochrome LED lamp includes at least one LED and a control circuit, the LED is R LED or G LED or B LED, and the single-color light-emitting diode lamp has three pins, which are an anode pin, a cathode pin and a synchronization pin, wherein the anode pin and the cathode pin receive a DC voltage , and the sync pin is connected to the control circuit. Likewise, in different embodiments, the control circuit can output a reference signal (or synchronization signal) with a fixed frequency at the synchronization pin, or receive a reference signal (or synchronization signal) at the synchronization pin, and the The control circuit controls the light-emitting diodes to change colors based on the reference signal (or synchronous signal).

Please refer to FIG. 6 , which shows a circuit block diagram of the first embodiment of the synchronous LED light string of the present invention. In the first embodiment of the present invention, a synchronous LED lamp string includes a power converter 20 and a plurality of LED lamps 10, the power converter 20 rectifies an AC power supply to provide a DC voltage to drive the A light string composed of a plurality of LED lamps 10, and the LED lamp 10 can be the RGB LED lamp group shown in FIG. 5 or the above-mentioned single-color LED lamp.

In the embodiment shown in FIG. 6 , parallel-connected LED lamps 10 are connected in series to form a light string, and the synchronization pins of all LED lamps 10 are connected together. A plurality of LED lamps 10 includes a main LED lamp 17 and a plurality of auxiliary LED lamps 18, wherein the control circuit 14 of the main LED lamp 17 outputs a reference signal (or synchronous signal) with a fixed frequency on its synchronization pin. signal), and other secondary LED lamps 18 receive the reference signal (or synchronous signal) on their synchronous pins, so that all LED lamps 10 can control color change or flicker synchronously based on this reference signal (or synchronous signal) .

Please refer to FIG. 7 , which shows another circuit block diagram of the first embodiment of the synchronous LED light string of the present invention. The embodiment shown in FIG. 7 is a modification of the embodiment shown in FIG. 6, wherein the difference is that the light-emitting diode lamps 10 forming the light string are all auxiliary light-emitting diode lamps 18 of the embodiment shown in FIG. 6, and all The synchronization pin of the auxiliary LED lamp 18 receives a reference signal (or synchronization signal) with a fixed frequency output from the power converter 20, so that all auxiliary LED lamps 18 are synchronized based on this reference signal (or synchronization signal). To control color change or flicker, the frequency of the reference signal (or synchronous signal) is generated based on the frequency of the AC power input by the power converter 20 .

In the embodiment shown in Fig. 6 and Fig. 7, the structure of the light string is connected in series. The anode pin of the LED lamp group (or single-color LED lamp), so the potential of each LED lamp is not equal. At this time, when the reference signal (or synchronous signal) of the fixed frequency is transmitted to the synchronous pin of the LED lamp of the next stage, its control circuit cannot identify it. Therefore, the design of the utility model between the upper and lower synchronous pins aims at this point and specifically designs a circuit for identifying signals, as shown in FIG. 8 . A capacitor C is connected between the output buffer 15 and the input buffer 16 of the synchronization pins of the upper and lower stages. In this way, the synchronization pins of each LED lamp can obtain the reference signal (or synchronization signal) from the same frequency source, so as to achieve the synchronous operation of the light strings.

Please refer to FIG. 9A and FIG. 9B , which show the circuit block diagram of the second embodiment of the synchronous LED light string of the present invention. In the second embodiment of the present invention, a carrier signal is provided on the DC voltage, and then each LED lamp demodulates the carrier signal from the DC voltage to obtain synchronous control. In the second embodiment of the present invention, a synchronous LED lamp string includes a power converter 20 and a plurality of LED lamps 2, the power converter 20 rectifies an AC power supply to provide a DC voltage to drive the A lamp string composed of a plurality of LED lamps, and the LED lamps can be the known RGB LED lamp group shown in Figure 4 or the RGB LED lamp group of the present utility model, wherein the parallel LED lamps are connected in series to form The string lights.

In the embodiment shown in FIG. 9A , the reference signal output by the power converter 20 is a carrier signal on a DC voltage. The carrier signal has a fixed frequency, and the carrier signal is input to the light-emitting diode lamp 2 through the series structure of the lamp string. The control circuit 14 of each light-emitting diode lamp 2 demodulates the carrier signal from the input DC voltage, so that the control circuit 14 achieves the purpose of synchronous control based on the fixed frequency of the carrier signal. In addition, in addition to the control circuit 14 of each LED lamp 2 having the function of demodulating the carrier signal, the control circuit 14 can also carry the carrier signal on a DC voltage and output it to the next-stage LED lamp 2, so that The control circuit 14 of the LED lamp 2 of the next stage can obtain the same carrier signal for synchronous control.

In the embodiment shown in FIG. 9B, the light string includes a main LED lamp 17 and a plurality of auxiliary LED lamps 18, and the control circuit of the main LED lamp 17 can provide a carrier signal carried on a DC voltage and output to The secondary LED lights 18 of the next stage, and the main LED lights 17 control color change or flicker according to the carrier signal. The control circuits of other auxiliary LED lamps 18 are demodulated by the DC voltage provided by the main LED lamp 17 or the upper stage auxiliary LED lamp 18 to control the color change or flicker on the carrier signal. In addition, the control circuit of each auxiliary light-emitting diode lamp 18 can also carry the carrier signal on the DC voltage and output to the next-stage auxiliary light-emitting diode lamp 18, so that the control circuit of the next-stage auxiliary light-emitting diode lamp 18 can obtain the same The carrier signal is controlled synchronously.

Please refer to FIG. 10 , which shows a circuit block diagram of a third embodiment of the synchronous LED light string of the present invention. In the third embodiment of the present invention, a synchronous LED lamp string includes a plurality of power converters 20 and a plurality of LED lamps 10, and each power converter 20 rectifies the AC power to provide a DC voltage to Drive a light emitting diode lamp 10, and the light emitting diode lamp 10 is the RGB light emitting diode lamp group shown in FIG. 5 or the above-mentioned single color light emitting diode lamp. A plurality of power converters 20 are connected in series to receive an AC power supply, and the synchronous pins of the LED lamps 10 receive reference signals output by individual power converters 20, and the frequency of the reference signal is based on the input AC power of the power converter 20. generated by the frequency.

Please refer to FIG. 11 , which shows another circuit block diagram of the third embodiment of the synchronous LED light string of the present invention. The embodiment shown in FIG. 11 is a modification of the embodiment shown in FIG. 10 , the difference being that the parallel-connected power converters 20 are connected in series to receive an AC power.

Please refer to FIG. 12 , which shows another circuit block diagram of the synchronous LED light string of the present invention. In this embodiment of the present invention, a synchronous LED lamp string includes a power converter 20 and a plurality of LED lamps 10. The power converter 20 rectifies an AC power supply to provide a DC voltage to drive multiple LED lamps. A light string composed of several light-emitting diode lamps 10 connected in series, and the light-emitting diode lamps are RGB light-emitting diode light groups shown in FIG. 5 or the above-mentioned single-color light-emitting diode lights.

In this embodiment of the present utility model, the LED lamps 10 forming the light string are all auxiliary LED lamps 18 of the embodiment shown in FIG. 6 , and the synchronization pins of all auxiliary LED lamps 18 receive the The reference signal output by 20 is a beat signal representing music, so that the light color of the light string changes to different colors along with the beat of the music.

Please refer to FIG. 13A , which shows another circuit block diagram of the LED light set of the present invention. In this one embodiment, the utility model provides a RGB light-emitting diode lamp 10, comprising a red light-emitting diode (R LED) 11, a green light-emitting diode (G LED) 12, a blue light-emitting diode (BLED) 13 and A control circuit 14, the control circuit can be implemented by an integrated circuit, and the control circuit 14 drives the color change sequence or flashing form of the R LED 11, G LED 12 and B LED 13 according to the signal input from the pin DI, or will The command or data of the pin DI is output by the pin DO.

In this embodiment, the RGB light-emitting diode lamp 10 of the present invention has four pins, which are respectively an anode pin V+, a cathode pin V-, an input pin DI and an output pin DO, which can be shown in Fig. 13B, wherein the anode pin and the cathode pin receive a DC voltage, the DC voltage is the working voltage of the light-emitting diode lamp 10, the input pin DI inputs the received signal to the control circuit 14, and the control circuit 14 instructs Or data is output by the output pin DO. The signals transmitted by the pins DI and DO can not only be used as a simple clock signal as a synchronous signal, but also can be used for data transmission. Therefore, for a light string composed of LED lamps 10 shown in FIG. Foot DI.

Please refer to FIG. 14 , which shows a circuit block diagram of the control circuit shown in FIG. 13A . The control circuit 14 of the RGB light-emitting diode lamp 10 includes an identification block, which receives the signal of the input pin DI for identification; a shift register, which receives the data transmitted by the identification block; and a register, which receives the complete Data; drive circuit, drive the color change sequence or flashing form of R LED 11, G LED 12 and BLED 13 according to the complete data of the temporary register; and the coding block, accept the instruction of the identification block to determine the complete data of the temporary register The code is output to the pin DO, and the identification block will identify whether the data transmitted by the input pin DI is an instruction of the own LED lamp 10 or recode the data and output it to the next-stage LED lamp 10 through the pin DO.

According to the specific embodiment of the light emitting diode lamp 10 shown in FIG. 14, the series light string shown in FIG. 15A and the parallel light string shown in FIG. The lamp 10 is shown in Fig. 13 and Fig. 14, wherein a plurality of LED lamps 10 are connected in series, and when the upper and lower LED lamps 10 are connected in series, the pin DO of the upper LED lamp 10 is connected to the lower LED to emit light. pin DI of the diode lamp 10 . In this embodiment, the power converter 20 that provides DC power to the synchronous LED lamp string has data processing capabilities, and can output command data to the input pin DI of the first LED lamp 10 through a signal line DO to control synchronous lighting. The color change sequence or flashing pattern of the diode light string.

The power converter 20 can have a built-in microprocessor or data processor and memory to store the form or effect to be displayed by the light string, such as running lights or lotto or chasing effects, and can even display specific graphics. After the power supply is connected, the microprocessor or data processor captures the data in the memory, and transmits different signals including data, clock and simultaneous display through a signal line DO in a specific data format.

In the embodiment shown in FIG. 15A and FIG. 15B , there are two methods of data transmission in the present invention. One is the method of adding a clock pulse to a voltage level, as shown in FIG. 16A . Before the power converter 20 starts to transmit data, the signal line DO is in a state of no data, which is represented by a voltage level of 1/2VDD. When the power converter 20 starts to transmit data, the “1” or “0” of the digital signal represents the command data executed by each RGB LED lamp 10 , and the action to be executed can be defined in advance.

In the process of transmitting data, each bit "1" or "0" must return to the 1/2VDD voltage level before transmitting the next bit, so data and clock can be included at the same time. After receiving the data, the control circuit 14 in each RGB LED lamp 10 interprets and recognizes the data internally, processes the data, encodes the data into the same signal format, and then transmits the data to the next LED lamp 10 . And the total number of LED lamps 10 has been defined at the beginning of planning for each synchronous LED lamp string, so each time the microprocessor or data processor needs to change the brightness, it sends a bit group equal to the total number of LED lamp groups , then the data is input and output by each RGB LED, and each bit group will be properly delivered to each light-emitting diode lamp 10.

Then after the data transmission is completed, the signal line DO and the pin DO of the light-emitting diode lamp 10 will stay at the 1/2VDD level. The embodiment of the utility model can define that when 1/2VDD occurs in each DO for more than a certain period of time, the data will be Locked and displayed. Thus, as long as different memory contents are replaced, the embodiment of the utility model can obtain light strings with different flickering or display changes, and the light string of this embodiment has a better elastic design.

Another kind of data transmission can encode the form of data as shown in Fig. 16B. The transmission of data and clock is carried out with the numbers "1" and "0" at a predetermined time interval. Similarly, it can be defined that when there is no data in a general time, if the signal stays at VDD or VSS; when it exceeds a period of time, it means a lock command and display changes. In this way, signals such as data, clock and simultaneous display can be successfully achieved through one signal line. The difference between the two is mainly that the former is a static way to identify data, while the latter requires each RGB light-emitting diode lamp 10 to generate its own clock to identify data.

The design of the light string is in addition to the synchronous concept of the utility model, but is it too monotonous if the light string only changes colors synchronously? Therefore, it is best to be able to change synchronously and flash asynchronously for a certain period of time, so that the design of the light string can be varied enough. Nowadays, there are many kinds of traditional light strings, such as running lights, chasing and so on. The LED light string of the utility model can also achieve these functions. In the embodiment of the utility model, the LED lights are first classified into several types, such as No. 1, No. 2, No. 3 and so on. When entering the running light or chasing function, the control circuit of the LED light delays the synchronous frequency of the synchronous signal according to the type of classification, so that such functions as running light or chasing can be achieved. For example, if the control circuit of the LED lamp numbered 1 delays the synchronous frequency for a fixed period of time, and the LED lamp numbered 2 delays the synchronous frequency by twice the fixed period of time, and so on, Then there will be phenomena such as running lights or chasing.

In different embodiments of the present utility model, the No. 1 LED light is fixed to one color, and the No. 2 LED light is bright to another color, and so on. After a period of time, different colors are changed, and the effect of chasing multiple colors will also be shown. . According to the LED light string implemented by the utility model, more complete and diversified light string products can be designed.

After describing the preferred embodiments of the present utility model in detail, those skilled in the art can clearly understand that various changes and changes can be made without departing from the scope and spirit of the claims, and the utility model is not limited to the specification. Implementation of the examples given.

Claims (5)

1. A light-emitting diode lamp comprising at least one light-emitting diode and a control circuit, characterized in that: The light emitting diode lamp has an anode pin, a cathode pin, a data input pin and a data output pin, the data input pin and the data output pin are electrically connected to the control circuit and the control circuit according to The data on the data input pin controls the LED to emit light. 2. The light emitting diode lamp according to claim 1, wherein the light emitting diode comprises: a red light emitting diode, a green light emitting diode and a blue light emitting diode, and the control circuit identifies the data input interface pin data to control the red light emitting diode, green light emitting diode and blue light emitting diode to blink or change color. 3. The light-emitting diode lamp according to claim 1, wherein the control circuit comprises an identification block, which receives data from the data input pin for identification; a shift register, which receives the data transmitted by the identification block; A temporary register, receiving the complete data stored in the displacement register; a driving circuit, driving the light-emitting diode to emit light according to the complete data in the temporary register; and an encoding block, receiving instructions from the identification block to determine and outputting the complete data encoding of the shift register to the data output pin. 4. A synchronous LED lamp string, comprising: a plurality of LED lamps and a power converter, the power converter provides the DC voltage required by the LED lamps, and the LED lamps include at least one A light-emitting diode and a control circuit for controlling discoloration are characterized in that: The light-emitting diode lamp has an anode pin, a cathode pin, a data input pin and a data output pin, and these light-emitting diode lights are connected in series, and the data input pin between two light-emitting diodes connected to the data output pin, and the aforementioned control circuit of each LED lamp controls the LED to emit light according to the data on the data input pin. 5. The synchronous LED light string according to claim 4, wherein a microprocessor and a memory are built in the power converter, and the microprocessor outputs data to the first serially connected LED The data input pin of the light, and the output data of the microprocessor can be transmitted between the LED lights connected in series.

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