Lamp string control circuit and lamp string module

Abstract

The invention discloses a lamp string control circuit and a lamp string module, and relates to the technical field of lamp strings, the lamp string control circuit comprises a master control circuit, a power supply circuit and a slave control circuit, the master control circuit is used for outputting a lamp string sequence control signal; the input end of the power circuit is connected with a power supply, and the controlled end of the power circuit is connected with the main control circuit to receive a light string sequence control signal; the power supply circuit is used for outputting a first power supply signal through the output end when the light string sequence control signal is a first high level signal; the output module is used for outputting a second power supply signal through the output end when the light string sequence control signal is the first low-level signal; the power supply end of the slave control circuit is connected with the output end of the power supply circuit, and the slave control circuit is used for determining a light string sequence control signal according to the received first power supply signal and the second power supply signal and controlling the light string to be turned on. The power line and the communication line are combined, the power signal serves as the communication signal, and resource waste of lamp string products is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of light strings, and in particular to a light string control circuit and a light string module. Background Art

[0002] Conventional light strings require power lines, communication lines, and grounding lines. To accommodate these multiple lines, a 32-bit single-chip microcontroller (MCU) may be used as the main control chip. However, using a 32-bit MCU wastes hardware resources and increases manufacturing costs. Summary of the Invention

[0003] The main purpose of the present invention is to propose a light string control circuit and a light string module, which aims to combine the power line and the communication line, use the power signal as the communication signal, and reduce the resource waste of the light string products.

[0004] To achieve the above objectives, the light string control circuit proposed in the present invention includes: a main control circuit, the main control circuit being configured to output a light string sequence control signal, the light string sequence control signal comprising a first high level signal and a first low level signal; A power supply circuit, the power supply circuit having an input end, an output end, and a controlled end; the input end of the power supply circuit is used to access a power source, and the controlled end of the power supply circuit is connected to the main control circuit to receive the light string sequence control signal; The power supply circuit is configured to output a first power supply signal through the output terminal when the light string sequence control signal is a first high-level signal; and is configured to output a second power supply signal through the output terminal when the light string sequence control signal is a first low-level signal; A slave control circuit, wherein the power supply end of the slave control circuit is connected to the output end of the power supply circuit, and the slave control circuit is used to determine the light string sequence control signal based on the first power supply signal and the second power supply signal received, and control the light string to light up according to the light string sequence control signal.

[0005] In one embodiment, the first power signal corresponds to a first voltage, the second power signal corresponds to a second voltage, the first voltage is greater than the second voltage, and the second voltage is equal to zero; The light string control circuit also includes a power storage module, which is connected to the slave control circuit and the power supply circuit respectively. The power storage module is used to charge when the power supply circuit outputs a first power signal, and to supply power to the slave control circuit when the power supply circuit outputs a second power signal.

[0006] In one embodiment, the power storage module includes a first diode and multiple energy storage capacitors, the anode of the first diode is connected to the input end of the power supply circuit, the cathode of the first diode is connected to the first ends of the multiple energy storage capacitors and the power supply end of the slave control circuit, and the second ends of the multiple energy storage capacitors are grounded.

[0007] In one embodiment, the light string control circuit further includes a remote control circuit, the remote control signal is connected to the main control circuit, and the remote control circuit is used to output a remote control signal corresponding to the trigger signal according to the trigger signal; The main control circuit is used to output a light string sequence control signal corresponding to the remote control signal according to the remote control signal.

[0008] In one embodiment, the duration for the main control circuit to output the light string sequence control signal is a first duration, and the duration for the main control circuit to decode the remote control signal is a second duration, and the second duration is greater than the first duration; The main control circuit is configured to decode the other remote control signal during the process of outputting a light string sequence control signal corresponding to the remote control signal.

[0009] In one embodiment, the first high-level signal is composed of a high level of a first preset duration and a low level of a second preset duration, the first low-level signal is composed of a high level of the second preset duration and a low level of the first preset duration, and the first preset duration is greater than the second preset duration; The remote control signal includes a second high-level signal and a second low-level signal, the second high-level signal is composed of a high level of a third preset duration and a low level of a fourth preset duration, the second low-level signal is composed of a high level of a fourth preset duration and a low level of the third preset duration, the third preset duration is greater than the fourth preset duration; the fourth preset duration is at least greater than three times the sum of the first preset duration and the second preset duration; The main control circuit is used to determine the current level of the remote control signal after outputting the first high-level signal or the first low-level signal.

[0010] In one embodiment, the light string sequence control signal includes a first high level signal of a first number and a first low level signal of a second number, and the sum of the first number and the second number is 48; The remote control signal includes an initial signal, a second high-level signal of a third number, and a second low-level signal of a fourth number, and the sum of the third number and the fourth number is 24; The first preset time length is 90 microseconds, the second preset time length is 10 microseconds; the third preset time length is 1200 microseconds, and the fourth preset time length is 400 microseconds.

[0011] In one embodiment, the power supply circuit includes a first switching tube, a second switching tube, a third switching tube, a first resistor, a second resistor, and a third resistor; A first end of the first resistor is connected to the output end of the main control circuit, a second end of the first resistor is connected to the controlled end of the first switch tube, the first end of the first switch tube is grounded, and the second end of the first switch tube is connected to the first end of the second resistor, the controlled end of the second switch tube, the controlled end of the third switch tube, and the first end of the third resistor; The second end of the second resistor and the first end of the second switch tube are connected to the input end for accessing a power supply. The second end of the second switch tube is connected to the slave control circuit and the first end of the third switch tube. The second end of the third switch tube is connected to the second end of the third resistor and is grounded.

[0012] In one embodiment, the light string control circuit includes a plurality of slave control circuits, and the plurality of slave control circuits are respectively connected to output ends of the master control circuit.

[0013] The present invention further provides a light string module, which includes the light string control circuit as described above.

[0014] In summary, this embodiment provides a light string control circuit structure that integrates power lines and communication lines. A master control circuit generates a light string sequence control signal. The power circuit outputs corresponding first and second power signals to the slave control circuit based on the light string sequence control signal. The slave control circuit analyzes the timing relationship between the first and second power signals, thereby restoring the light string sequence control signal and executing the corresponding light string control action based on the restored light string sequence control signal. This solution not only simplifies the light string wiring structure but also enables the system to use a lower-cost 8-bit microcontroller, thereby reducing overall manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0016] Figure 1 A system diagram of an embodiment of a light string control circuit provided by the present invention; Figure 2 A system diagram of another embodiment of the light string control circuit provided by the present invention; Figure 3A circuit diagram of an embodiment of a power supply circuit provided by the present invention; Figure 4 A circuit diagram of an embodiment of a slave control circuit and a power storage module provided by the present invention; Figure 5 A circuit diagram of an embodiment of a main control circuit provided by the present invention; Figure 6 This is a circuit diagram of an embodiment of a remote control circuit provided by the present invention.

[0017] Description of Figure Numbers: 10. Main control circuit; 20. Power supply circuit; 30. Slave control circuit; 40. Power storage module; 50. Remote control circuit.

[0018] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, 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 invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0021] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] In existing technology, light string control systems typically require three independent lines: a power line, a communication line, and a ground line. To achieve adaptation and efficient control of multiple lines, existing solutions often use a 32-bit microcontroller as the main control chip. However, this design has certain resource waste issues in practical applications. This is because 32-bit microcontrollers have high processing power and rich peripheral resources, while the light string control function is relatively simple, making it difficult to fully utilize their performance, resulting in hardware resource redundancy. In addition, the high cost of 32-bit microcontrollers further increases product manufacturing costs.

[0023] However, to address the aforementioned issues, this application provides a light string control circuit that combines the power line and the communication line, using the power signal as the communication signal, thereby reducing resource waste in light string products. It is understood that combining the signal line and the communication line allows the use of an 8-bit microcontroller instead of a 32-bit microcontroller, thus avoiding hardware resource waste and saving costs.

[0024] In one embodiment, if Figure 1 As shown, the light string control circuit proposed in the present invention includes a master control circuit 10 , a power supply circuit 20 and a slave control circuit 30 .

[0025] In this embodiment, the main control circuit 10 is used to output a light string sequence control signal, and the light string sequence control signal includes a first high level signal and a first low level signal.

[0026] The light string sequence control signal is composed of a first high-level signal and a first low-level signal that appear alternately, forming a specific timing sequence. For example, a light string sequence control signal can be composed of 20 high-level signals and 28 low-level signals in a certain order. This sequence can correspond to a specific light string display mode, such as flashing, color change, running lights, and other effects. Of course, the specific form of the light string sequence control signal (such as the number of levels, arrangement) and its mapping relationship with the lighting display effect can be flexibly set according to actual needs, and this application does not impose specific restrictions on this.

[0027] Furthermore, the control signal generation method is flexible. On the one hand, it can be generated by the system's internal automatic control program according to a preset mode; on the other hand, it can be dynamically generated according to user operation instructions (such as remote control, app control, etc.), thus achieving diversified and personalized light string display effects.

[0028] In this embodiment, the power supply circuit 20 has an input end, an output end and a controlled end; the input end of the power supply circuit 20 is used to connect to the power supply, and the controlled end of the power supply circuit 20 is connected to the main control circuit 10 to receive the light string sequence control signal; the power supply circuit 20 is used to output a first power signal through the output end when the light string sequence control signal is a first high-level signal; and, to output a second power signal through the output end when the light string sequence control signal is a first low-level signal.

[0029] As can be understood, the power circuit 20 is a key module for implementing power line communication. Its structure includes three ports: an input port, an output port, and a controlled port. The input port is used to connect to an external power source (such as a DC power adapter). The output port is connected to the slave control circuit 30 to provide a transmission path for power and communication signals. The controlled port is connected to the master control circuit 10 to receive the light string sequence control signal output by the master control circuit 10.

[0030] The power supply circuit 20 operates as follows: When the control signal output by the master control circuit 10 is at a first high level, the power supply circuit 20 transmits a first power signal to the slave control circuit 30 via its output terminal; when the control signal is at a first low level, the power supply circuit 20 outputs a second power signal. In this way, the power supply circuit 20 not only provides power to the light string but also encodes and transmits control information, thereby integrating power and communication signals. It should be noted that the first power signal can be 5V, and the second power signal can be 3V or a voltage waveform with specific modulation characteristics.

[0031] In this embodiment, the power supply end of the slave control circuit 30 is connected to the output end of the power supply circuit 20, and the slave control circuit 30 is used to determine the light string sequence control signal based on the received first power supply signal and the second power supply signal, and control the light string to light up according to the light string sequence control signal.

[0032] The slave control circuit 30 serves as the execution end of the light string control circuit, and its power supply end is connected to the output end of the power supply circuit 20, and is used to receive the first power supply signal and the second power supply signal output by the power supply circuit 20. The slave control circuit 30 has a built-in signal parsing module, which can identify the control information represented by the received first power supply signal and the second power supply signal based on the difference between them (such as voltage level, pulse width change, etc.), thereby parsing and restoring the original light string sequence control signal. After parsing and restoring the original light string sequence control signal, the slave control circuit 30 controls the lighting state of each LED lamp bead in the light string according to the timing characteristics of the light string sequence control signal, such as lighting, extinguishing, brightness adjustment or color change. In this way, the entire light string can complete the synchronous transmission of power supply and control information while using only one power cord, realizing a highly integrated control solution.

[0033] In a feasible embodiment, the first power supply signal is a 5V voltage signal, and the second power supply signal is a 3V voltage signal. When the slave control circuit 30 detects that its power input terminal receives a 5V voltage, it determines that the control signal corresponding to the current moment is a first high-level signal; and when it detects that the input voltage is 3V, it determines that the control signal corresponding to the current moment is a first low-level signal. In this way, the slave control circuit 30 can identify the control sequence sent by the master control terminal based on the high and low changes in the power supply voltage, and realize the analysis and execution of the light string display mode. In other words, the slave control circuit 30 realizes the process of converting the analog quantity of the power supply signal into a digital signal that can be used for logical judgment, thereby completing the transmission and decoding of control information without the need for an independent communication line.

[0034] Optionally, to improve the accuracy of signal recognition, a voltage comparator or ADC module may be provided in the slave control circuit 30 to accurately detect and judge the input voltage, thereby avoiding misjudgment due to power supply fluctuations or noise interference.

[0035] As you can see, this light string control circuit eliminates the need for additional communication lines for the entire light string system, reducing material costs. Furthermore, due to the relatively simple control logic, both the master and slave controllers can be implemented using low-cost 8-bit microcontrollers, avoiding the resource waste of 32-bit microcontrollers and significantly improving the product's cost-effectiveness.

[0036] In summary, this embodiment provides a light string control circuit structure that integrates power lines and communication lines. A master control circuit 10 generates a light string sequence control signal. The power circuit 20 outputs corresponding first and second power signals to the slave control circuit 30 based on the light string sequence control signal. The slave control circuit 30 analyzes the timing relationship between the first and second power signals, thereby restoring the light string sequence control signal and executing the corresponding light string control action based on the restored light string sequence control signal. This solution not only simplifies the light string wiring structure but also enables the system to use a lower-cost 8-bit microcontroller, thereby reducing overall manufacturing costs.

[0037] In one embodiment, the first power signal corresponds to a first voltage, the second power signal corresponds to a second voltage, the first voltage is greater than the second voltage, and the second voltage is zero; Figure 2 As shown, the light string control circuit also includes a power storage module 40, which is respectively connected to the slave control circuit 30 and the power supply circuit 20, and the power storage module 40 is used to charge when the power supply circuit 20 outputs a first power signal, and to supply power to the slave control circuit 30 when the power supply circuit 20 outputs a second power signal.

[0038] In this embodiment, the voltage value corresponding to the first voltage can be 5V, 3V, 4V, 6V, etc., which is not limited here, as long as it is greater than zero; and the voltage value corresponding to the second voltage is 0V. In other words, the first voltage corresponds to a first high-level signal, i.e., a high level; and the second voltage corresponds to a first low-level signal, i.e., a low level.

[0039] It should be noted that, since the power signal outputs the second power signal, it corresponds to a 0V power supply, and therefore the slave control circuit 30 at the corresponding moment cannot receive power, that is, it is in a power-off state. In order to ensure that the slave control circuit 30 can still operate normally during the power-off state, the light string control circuit includes a power storage module 40. The power storage module 40 is connected to the slave control circuit 30 and the power circuit 20 respectively, and its functions are as follows: when the power circuit 20 outputs the first power signal (i.e., the first voltage), the power storage module 40 obtains electric energy through the power circuit 20 and charges, and at this time the power circuit 20 normally supplies power to the slave control circuit 30; when the power circuit 20 outputs the second power signal (i.e., the second voltage), the power circuit 20 is disconnected from supplying power to the slave control circuit 30, and the power storage module 40 can release the stored electric energy at this time to provide continuous and stable power supply to the slave control circuit 30 to maintain the normal operation of its control and communication functions.

[0040] Therefore, by providing the power storage module 40, this embodiment effectively solves the problem of power outage or abnormal operation that may occur in the slave control circuit 30 during the periodic interruption of the power signal (such as high and low level switching for communication), thereby ensuring the stability and reliability of the light string control system and avoiding poor display effects.

[0041] In one embodiment, if Figure 4 As shown, the energy storage module 40 includes a first diode D1 and a plurality of energy storage capacitors Ce, the anode of the first diode D1 is connected to the input end of the power supply circuit 20, the cathode of the first diode D1 is connected to the first ends of the plurality of energy storage capacitors Ce and the power supply end of the slave control circuit 30, and the second ends of the plurality of energy storage capacitors Ce are grounded.

[0042] It is understood that the energy storage module 40 consists of a first diode D1 and multiple parallel-connected energy storage capacitors Ce, which are used to achieve unidirectional storage of electrical energy and stable power supply. Specifically, the anode of the first diode D1 is connected to the input terminal of the power supply circuit 20, and the cathode is connected to one end of the multiple energy storage capacitors Ce and the power supply terminal of the slave control circuit 30. The other ends of all energy storage capacitors Ce are grounded. When the power supply circuit 20 outputs a first power signal (high voltage), current flows through the first diode D1 to charge the energy storage capacitor Ce, while also supplying power to the slave control circuit 30. When the power supply circuit 20 outputs a second power signal (zero voltage or low level), the unidirectional conduction characteristics of the diode isolate the energy storage capacitor Ce from the power supply side, preventing reverse discharge. At this time, the capacitor continues to supply power to the slave control circuit 30 through the stored electrical energy, ensuring stable operation during power signal interruptions. This simple and reliable structure effectively improves the system's ability to continue operating during power modulation communication. Optionally, a current-limiting capacitor can be provided between the first diode D1 and the energy storage capacitor Ce.

[0043] In one embodiment, if Figure 2 and Figure 6 As shown, the light string control circuit also includes a remote control circuit 50, and the remote control signal is connected to the main control circuit 10. The remote control circuit 50 is used to output a remote control signal corresponding to the trigger signal according to the trigger signal; the main control circuit 10 is used to output a light string sequence control signal corresponding to the remote control signal according to the remote control signal.

[0044] It is understandable that the remote control circuit 50 is connected to the main control circuit 10. The remote control circuit 50 is used to receive a trigger signal input by the user, such as a button operation or a wireless command, and generate a corresponding remote control signal, such as an infrared signal, a radio frequency signal, or a Bluetooth signal, based on the trigger signal. After receiving the remote control signal, the main control circuit 10 parses the control instruction represented by it and generates a corresponding light string sequence control signal based on it, which is used to control the display mode of the light string, such as switching the light color, changing the flashing frequency, or starting a specific dynamic effect. This design enables the user to remotely control the light string, improving the interactivity and ease of use of the system.

[0045] For example, the user sends a trigger signal through the "flash" button on the remote control. After receiving the operation, the remote control circuit 50 will generate a corresponding infrared remote control signal and transmit it to the main control circuit 10. After parsing the remote control signal, the main control circuit 10 identifies the flashing instruction and generates a corresponding light string sequence control signal, which is composed of alternating high and low levels, corresponding to the flashing control logic. Subsequently, the power supply circuit 20 modulates the output power supply voltage according to the control signal, and the slave control circuit 30 receives and decodes it to drive the light string to achieve a flashing effect. In this way, the user can remotely switch the display mode of the light string to achieve personalized lighting control, which is suitable for scenes such as holiday decorations, home lighting, and outdoor landscapes.

[0046] It should be noted that in the existing light string control system, if the main control circuit receives an external remote control signal during the process of sending the light string sequence control signal, it usually adopts two processing methods: one is to interrupt the current data transmission to give priority to the remote control signal. Although this method responds quickly, it will cause the light string display to appear briefly stuck or flicker, affecting the visual effect; the other is to wait until the current data is sent before processing the remote control signal. Although it ensures the stable display of the light string, it may cause the remote control signal to be lost or the response to be delayed, resulting in insensitive remote control.

[0047] In one embodiment, in order to improve the above problem, the duration of the main control circuit 10 outputting the light string sequence control signal is a first duration, and the duration of the main control circuit 10 decoding the remote control signal is a second duration, and the second duration is greater than the first duration; the main control circuit 10 is used to decode another remote control signal during the process of outputting a light string sequence control signal corresponding to the remote control signal.

[0048] It can be understood that the time required for the main control circuit 10 to output a light string sequence control signal is a first duration, while the time required for it to completely decode the remote control signal is a second duration, where the second duration is greater than the first duration. Based on this, the main control circuit 10 is configured to utilize the idle time slices between each control cycle to perform segmented sampling and decoding of the remote control signal while continuously outputting the light string sequence control signal. In this way, through the mechanism of decoding while sending, the main control circuit 10 can complete the reception and processing of the remote control signal without interrupting the light string data transmission, thereby ensuring the stability of the light display while improving the real-time and reliability of the remote control response.

[0049] In one embodiment, the first high-level signal is composed of a high level of a first preset duration and a low level of a second preset duration, the first low-level signal is composed of a high level of a second preset duration and a low level of a first preset duration, and the first preset duration is greater than the second preset duration; the remote control signal includes a second high-level signal and a second low-level signal, the second high-level signal is composed of a high level of a third preset duration and a low level of a fourth preset duration, the second low-level signal is composed of a high level of a fourth preset duration and a low level of the third preset duration, and the third preset duration is greater than the fourth preset duration; the fourth preset duration is at least greater than three times the sum of the first preset duration and the second preset duration; the main control circuit 10 is used to determine the current level of the remote control signal after outputting the first high-level signal or the first low-level signal.

[0050] In this embodiment, the light string sequence control signal includes a first high-level signal of a first number and a first low-level signal of a second number, and the sum of the first number and the second number is 48; the remote control signal includes an initial signal, a second high-level signal of a third number and a second low-level signal of a fourth number, and the sum of the third number and the fourth number is 24; the first preset time length is 90 microseconds, and the second preset time length is 10 microseconds; the third preset time length is 1200 microseconds, and the fourth preset time length is 400 microseconds.

[0051] It can be understood that the first high-level signal, representing a "1," consists of a high level of a first preset duration and a low level of a second preset duration; the first low-level signal, representing a "0," consists of a high level of a second preset duration and a low level of a first preset duration. Because the first preset duration is greater than the second preset duration, "1" and "0" can be distinguished by the duration of the high level. Optionally, the first preset duration is 90 microseconds, and the second preset duration is 10 microseconds. Therefore, a "1" is equal to a 90 microsecond high level + a 10 microsecond low level; a "0" is equal to a 10 microsecond high level + a 90 microsecond low level. The total duration of each data bit is 100 microseconds, meaning the light control signal is transmitted at a rate of 100 microseconds per bit. Furthermore, the entire light string sequence control signal contains 48 data bits (i.e., 48 "1s" or "0s"), which are used to control the light string display mode (such as color, brightness, animation, etc.). The transmission time of the entire light string sequence control signal is 4800 microseconds.

[0052] It can be understood that the second high-level signal, representing a "1," is composed of a high level of the third preset duration + a low level of the fourth preset duration; the second low-level signal, representing a "0," is composed of a high level of the fourth preset duration + a low level of the third preset duration; and the third preset duration is greater than the fourth preset duration. Optionally, the third preset duration is 1200 microseconds and the fourth preset duration is 400 microseconds; therefore, a "1" = a 1200 microsecond high level + a 400 microsecond low level; a "0" = a 400 microsecond high level + a 1200 microsecond low level; and the total duration of each remote control signal bit is 1600 microseconds.

[0053] It should be noted that this embodiment can achieve simultaneous lighting control and remote control. The light string sequence control signal is sent at 100 microseconds per bit, that is, a first high-level signal or a first low-level signal is sent every 100 microseconds; the remote control signal is received at 1600 microseconds per bit, that is, a second high-level signal or a second low-level signal is received every 1600 microseconds. Because the transmission period of the lighting control signal is much shorter than the reception period of the remote control signal, the main control circuit 10 can sample the level state of the remote control signal once after each first high-level signal or first low-level signal is sent to determine the second high-level signal or the second low-level signal; after multiple lighting control signal transmission cycles, the complete remote control signal is gradually spliced ​​out. In this way, there is no need to wait for the remote control signal to be fully received before continuing to send the lighting control signal, and the lighting control signal transmission will not be interrupted, thereby avoiding lighting freezes. At the same time, the remote control signal will not be missed due to the issuance of the lighting control, ensuring sensitive remote control response.

[0054] In one embodiment, the power supply circuit 20 includes a first switching tube, a second switching tube, a third switching tube, a first resistor, a second resistor, and a third resistor; the first end of the first resistor is connected to the output end of the master control circuit 10, the second end of the first resistor is connected to the controlled end of the first switching tube, the first end of the first switching tube is grounded, and the second end of the first switching tube is connected to the first end of the second resistor, the controlled end of the second switching tube, the controlled end of the third switching tube, and the first end of the third resistor; the second end of the second resistor and the first end of the second switching tube are connected to the input end for connecting to the power supply, the second end of the second switching tube is connected to the slave control circuit 30 and the first end of the third switching tube, and the second end of the third switching tube is connected to the second end of the third resistor and is grounded.

[0055] In this circuit design, outputting the first power signal (5V) or 0 voltage is achieved by controlling the states of the first, second, and third switches. When the master control circuit 10 sends a first high-level signal through the COM1 interface, the first high-level signal flows to the controlled terminal of the first switch after being limited by the first resistor, turning the first switch off. At this point, the 5V power flows through the second resistor to the second and third switches, turning them on. This completes the loop, and the 5V power flows through J2 to the slave control circuit 30. Conversely, when the master control circuit 10 sends a first low-level signal through the COM1 interface, the first switch turns on, the 5V power is grounded, and the second and third switches turn off. No power is output to the slave control circuit 30, resulting in a 0 voltage, i.e., the second power signal.

[0056] In one embodiment, the light string control circuit includes a plurality of slave control circuits 30 , and the plurality of slave control circuits 30 are respectively connected to the output ends of the master control circuit 10 .

[0057] It can be understood that in this embodiment, the light string control circuit adopts a distributed control architecture with one master and multiple slaves. The master control circuit 10 serves as the control core of the entire system, and its output end is connected to multiple slave control circuits 30, each of which controls one or a group of LED lamp beads. The master control circuit 10 generates a unified light string sequence control signal based on the preset display mode or the received remote control command, and transmits the signal to each slave control circuit 30 through a shared power line (which is also a communication line). Each slave control circuit 30 independently parses the control information contained in the received power signal and controls the lighting status (such as color, brightness, flashing frequency, etc.) of the LED lamp beads to which it is connected based on the information, thereby realizing synchronous or asynchronous control of the entire string of lights.

[0058] In one feasible implementation, the plurality of slave control circuits 30 are all connected to the output end of the power circuit 20 and are capable of synchronously controlling the corresponding light strings.

[0059] In one possible implementation, Figure 5 As shown, the main control circuit 10, the COM1 pin of the main control circuit 10 is connected to the COM1 interface of the power circuit (such as Figure 3 As shown), the J2 end of the power circuit is connected to the J3 end of the slave control circuit (as shown Figure 4 The remote control circuit is connected to the main control circuit 10 via the DO terminal and the SHUT terminal.

[0060] The present invention also proposes a light string module, which includes a light string control circuit. The specific structure of the light string control circuit refers to the above-mentioned embodiment. Since this light string module adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A light string control circuit, characterized in that: The light string control circuit includes: a main control circuit, the main control circuit being configured to output a light string sequence control signal, the light string sequence control signal comprising a first high level signal and a first low level signal; A power supply circuit, the power supply circuit having an input end, an output end, and a controlled end; the input end of the power supply circuit is used to access a power source, and the controlled end of the power supply circuit is connected to the main control circuit to receive the light string sequence control signal; The power supply circuit is configured to output a first power supply signal through the output terminal when the light string sequence control signal is a first high-level signal; and is configured to output a second power supply signal through the output terminal when the light string sequence control signal is a first low-level signal; A slave control circuit, wherein the power supply end of the slave control circuit is connected to the output end of the power supply circuit, and the slave control circuit is used to determine the light string sequence control signal based on the first power supply signal and the second power supply signal received, and control the light string to light up according to the light string sequence control signal.

2. The light string control circuit according to claim 1, wherein: The first power signal corresponds to a first voltage, the second power signal corresponds to a second voltage, the first voltage is greater than the second voltage, and the second voltage is equal to zero; The light string control circuit also includes a power storage module, which is connected to the slave control circuit and the power supply circuit respectively. The power storage module is used to charge when the power supply circuit outputs a first power signal, and to supply power to the slave control circuit when the power supply circuit outputs a second power signal.

3. The light string control circuit according to claim 2, wherein: The power storage module includes a first diode and multiple energy storage capacitors, the anode of the first diode is connected to the input end of the power supply circuit, the cathode of the first diode is connected to the first ends of the multiple energy storage capacitors and the power supply end of the slave control circuit, and the second ends of the multiple energy storage capacitors are grounded.

4. The light string control circuit according to claim 1, wherein: The light string control circuit further includes a remote control circuit, the remote control signal is connected to the main control circuit, and the remote control circuit is used to output a remote control signal corresponding to the trigger signal according to the trigger signal; The main control circuit is used to output a light string sequence control signal corresponding to the remote control signal according to the remote control signal.

5. The light string control circuit according to claim 4, wherein: The duration for the main control circuit to output the light string sequence control signal is a first duration, and the duration for the main control circuit to decode the remote control signal is a second duration, and the second duration is greater than the first duration; The main control circuit is configured to decode the other remote control signal during the process of outputting a light string sequence control signal corresponding to the remote control signal.

6. The light string control circuit according to claim 5, wherein: The first high-level signal is composed of a high level of a first preset duration and a low level of a second preset duration, and the first low-level signal is composed of a high level of the second preset duration and a low level of the first preset duration, and the first preset duration is greater than the second preset duration; The remote control signal includes a second high-level signal and a second low-level signal, the second high-level signal is composed of a high level of a third preset duration and a low level of a fourth preset duration, the second low-level signal is composed of a high level of a fourth preset duration and a low level of the third preset duration, the third preset duration is greater than the fourth preset duration; the fourth preset duration is at least greater than three times the sum of the first preset duration and the second preset duration; The main control circuit is used to determine the current level of the remote control signal after outputting the first high-level signal or the first low-level signal.

7. The light string control circuit according to claim 5, wherein: The light string sequence control signal includes a first high level signal of a first number and a first low level signal of a second number, and the sum of the first number and the second number is 48; The remote control signal includes an initial signal, a second high-level signal of a third number, and a second low-level signal of a fourth number, and the sum of the third number and the fourth number is 24; The first preset time length is 90 microseconds, the second preset time length is 10 microseconds; the third preset time length is 1200 microseconds, and the fourth preset time length is 400 microseconds.

8. The light string control circuit according to any one of claims 1 to 7, characterized in that: The power supply circuit includes a first switch tube, a second switch tube, a third switch tube, a first resistor, a second resistor and a third resistor; A first end of the first resistor is connected to the output end of the main control circuit, a second end of the first resistor is connected to the controlled end of the first switch tube, the first end of the first switch tube is grounded, and the second end of the first switch tube is connected to the first end of the second resistor, the controlled end of the second switch tube, the controlled end of the third switch tube, and the first end of the third resistor; The second end of the second resistor and the first end of the second switch tube are connected to the input end for accessing a power supply. The second end of the second switch tube is connected to the slave control circuit and the first end of the third switch tube. The second end of the third switch tube is connected to the second end of the third resistor and is grounded.

9. The light string control circuit according to claim 1, wherein: The light string control circuit includes a plurality of slave control circuits, and the plurality of slave control circuits are respectively connected to the output ends of the master control circuit.

10. A light string module, characterized in that: The light string module includes the light string control circuit according to any one of claims 1 to 9.

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