General control circuit of high-voltage color LED lamp strip

Abstract

The utility model discloses a master control circuit of a high-voltage color LED lamp strip, which comprises a first rectifier module, a power supply module and a master control module, the output end of the first rectifier module is connected to the power supply module, the output end of the power supply module is connected with the master control module, and the master control module only outputs a control instruction. According to the utility model, the master control single-chip microcomputer of the master control module only sends out the control instruction, and the sub-control single-chip microcomputers of the control units on the lamp strip control the light-emitting modules in the control units, so that the wiring of the lamp strip is simple, and the light-emitting modules among the control units of the lamp strip can correspond to each other to realize the light effects of running water, magical colors and the like.

Description

Technical Field

[0001] This utility model relates to LED lighting circuits, specifically disclosing a master control circuit for a high-voltage colored LED light strip. Background Technology

[0002] High-voltage color LED light strips refer to light strips with a working voltage of 220V, which can be directly connected to mains power. They consist of an outer sheath, power conductors wrapped inside, and multiple circuit boards, on which color LED beads are mounted. High-voltage color LED light strips have a complex manufacturing process and low production efficiency because each circuit board segment needs to be soldered to the conductors. Furthermore, because they only use an external controller, the light color can only change as a whole, not segmentally, resulting in a limited lighting effect. Low-voltage color LED light strips refer to light strips with a working voltage of 12V to 36V, which require a driver power supply to connect to mains power. They also consist of an outer sheath, a circuit board wrapped inside, and color LED beads mounted on the circuit board. Low-voltage color LED light strips have a large voltage drop due to the low-voltage transmission of current through the circuit board. When the length (or power) of the light strip exceeds a certain value, the brightness of the LED beads at the later stages decreases, or they may even fail to function properly, resulting in uneven brightness across the light strip. Utility Model Content

[0003] Therefore, it is necessary to provide a master control circuit for a color LED light strip that is simple to manufacture, has high production efficiency, and low circuit voltage, addressing the problems of existing technologies.

[0004] To address the problems of existing technologies, this utility model discloses a master control circuit for a high-voltage colored LED light strip, comprising a first rectifier module, a power supply module, and a master control module. The input terminal of the first rectifier module is connected to AC mains power, and its output terminal is connected to the power supply module. The output terminal of the power supply module is connected to the master control module, which only outputs control commands. The first rectifier module is a surface-mount bridge rectifier, including two AC input terminals for connecting to AC mains power, a first positive terminal, and a first negative terminal. The power supply module includes a power chip, which includes a power chip positive terminal, a power chip negative terminal, a power output positive terminal, and a power output negative terminal. The power chip positive terminal is connected to a first rectifier module. A resistor is connected to the first positive terminal, the negative terminal of the power chip is connected to the first negative terminal, the positive output terminal of the power supply is connected to the first negative terminal through a first diode and a first capacitor connected in parallel, and the negative terminal of the power chip is connected to the positive output terminal of the power supply through a first inductor; the main control module includes a main control microcontroller, which includes a positive pin, a negative pin, a first mode pin, a second mode pin, and a main signal output pin. The positive pin is connected to the positive output terminal of the power chip, the negative pin is connected to the first negative terminal, and the first mode pin and the second mode pin are respectively connected to the first negative terminal through a first button switch and a second button switch.

[0005] The beneficial effects of this utility model are as follows: Since the main control microcontroller of the main control module only issues control commands, the sub-control microcontrollers of each control unit on the light strip control the three light-emitting modules in that control unit. The wiring of the light strip is simple, and the light-emitting modules of multiple control units on the light strip can respond to each other to achieve lighting effects such as flowing water and color changing.

[0006] As an improvement to this invention: the main control module further includes a zero-crossing detection module, and the main control microcontroller further includes a zero-crossing detection pin. The zero-crossing detection module includes an optocoupler, with its receiving end (C) connected to the zero-crossing detection pin and connected to the first negative terminal via a second capacitor; its receiving end (E) is also connected to the first negative terminal; its transmitting end (positive) is connected to the input terminal of the first rectifier module via a second resistor and connected to the first negative terminal via a second diode and a third resistor in parallel; and its transmitting end (negative) is connected to the first negative terminal. The main control module also includes a remote control input module, and the main control microcontroller further includes a third mode pin. The input terminal of the remote control input module is connected to the third mode pin. The main signal output pin of the main control microcontroller is also connected to the positive power output of the power chip via a positively connected third diode and connected to the first negative terminal via a reversely connected fourth diode. Attached Figure Description

[0007] Figure 1 This is the circuit diagram of the main control circuit of this utility model.

[0008] Figure 2 This is a circuit diagram of a control unit of this utility model. Detailed Implementation

[0009] To further understand the features, technical means, specific purpose, and function of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0010] refer to Figure 1 and Figure 2 A circuit structure for a colored LED light strip includes a controller and an LED light strip. The controller includes a main control circuit, and the light strip includes sub-control circuits.

[0011] The main control circuit includes a first rectifier module DB1, a power supply module 1, a main control module 2, a zero-crossing detection module 3, and a remote control input module 4. The input terminal of the first rectifier module DB1 is used to connect to the mains power, and its output terminal is connected to the power supply module and the main control module. The input terminal of the zero-crossing detection module 3 is connected to the input terminal of the first rectifier module DB1, and its output terminal is connected to the main control module.

[0012] The first rectifier module DB1 is a surface-mount bridge rectifier with full-bridge rectification. Its output terminals include a first positive terminal V1+ and a first negative terminal V1-.

[0013] The power module 1 includes a power chip U1, which comprises a positive terminal DRAIN, a negative terminal IC-GND, a positive output terminal VOUT, and a negative output terminal GND. The positive terminal DRAIN is connected to the first positive terminal V1+ via a first resistor R1, and its negative terminal IC-GND is connected to the first negative terminal V1-. The positive output terminal VOUT is connected to the first negative terminal V1- via a first diode D1 and a first capacitor C1 connected in parallel. The negative terminal IC-GND is connected to the positive output terminal VOUT via a first inductor L1. The positive terminal DRAIN serves as the drain of the internal MOSFET and also provides self-power to the chip. The negative terminal IC-GND is connected to the source of the internal MOSFET.

[0014] The main control module 2 includes a main control microcontroller U2, which includes a positive pin VDD, a negative pin GND, a zero-crossing detection pin AC, a first mode pin D1, a second mode pin D2, a third mode pin D3, a main signal output pin DO, and an indicator light pin LG. The positive pin VDD is connected to the positive power output VOUT of the power chip U1. The negative pin GND is connected to the first negative terminal V1- of the first rectifier module DB1. The main signal output pin DO is connected to the positive power output VOUT of the power chip U1 via a positively connected third diode D3, and to the first negative terminal V1- via a reversely connected fourth diode D4. The third diode D3 and the fourth diode D4 provide clamping protection for the signal output voltage. The indicator light pin LG is connected to the first negative terminal V1- via an indicator light L and a series fifth resistor R5. The first mode pin D1 and the second mode pin D2 are connected to the first negative terminal V1- via a first push-button switch K1 and a second push-button switch K2, respectively.

[0015] The zero-crossing detection module 3 includes an optocoupler OC. The receiver (C) of the optocoupler OC is connected to the zero-crossing detection pin (AC) of the main control microcontroller and is connected to the first negative terminal (V1-) through a second capacitor (C2). Its receiver (E) is also connected to the first negative terminal (V1-). Its transmitter (positive) is connected to the input terminal of the first rectifier module DB1 through a second resistor (R2) and is connected to the first negative terminal (V1-) through a second diode (D2) and a third resistor (R3) in parallel. Its transmitter (negative) is also connected to the first negative terminal (V1-). The zero-crossing detection module 3 is used to detect the AC signal at the input terminal of the first rectifier module DB1, enabling synchronization of multiple main control modules 2 within the same space.

[0016] The remote control input module 4 includes an RF receiver chip U3, which has an RF chip positive terminal VCC, an RF chip negative terminal GND, an RF signal input pin ANT, an RF signal output pin DO, an external crystal oscillator pin RO, a squelch selection pin SQ, and a mode selection pin SHUT. The RF chip positive terminal VCC is connected to the positive power output terminal VOUT of the power supply chip U1, and is connected to the first negative terminal V1- of the first rectifier module DB1 through a third capacitor C3. The RF chip negative terminal GND is connected to the first negative terminal V1-. The RF signal input pin ANT is connected to the first negative terminal V1- through a second inductor, and is connected to the antenna T through a fourth capacitor C4. The antenna T is connected to the first negative terminal V1- through a third inductor and a fifth capacitor C5 connected in parallel. The RF signal output pin is connected to the third mode pin D3 of the microcontroller U2. The external crystal oscillator pin RO is connected to the crystal oscillator Y, and the squelch selection pin SQ is connected to the first negative terminal V1- through a sixth resistor. The mode selection pin SHUT is connected to the first negative terminal V1-.

[0017] The sub-control circuit includes two live wire circuits L and neutral wire circuit N extending along the length of the light strip, and multiple control units arranged along the length of the light strip. Each control unit includes a second rectifier module DB2, a sub-control microcontroller U4, and three light-emitting modules: a red light module R, a blue light module G, and a green light module B.

[0018] The second rectifier module DB2 is a surface-mount bridge rectifier. Its input is connected to the live wire circuit L and the neutral wire circuit N, and can also be connected to the input of the first rectifier module DB1 through the live wire circuit L and the neutral wire circuit. Its output includes a second positive terminal V2+ and a second negative terminal V2-. The sub-controller microcontroller U4 includes a sub-controller chip positive terminal VCC, a sub-controller chip negative terminal GND, a first output pin ID1, a second output pin ID2, a third output pin ID3, a signal output pin ID4, and a signal input pin ID5. The sub-controller chip positive terminal VCC is connected to the second positive terminal V2+ through a seventh resistor R7, and is connected to the second negative terminal V2- through a fifth diode D5, a sixth capacitor C6, and an eighth resistor R8 connected in parallel. The sub-controller chip negative terminal GND is connected to the second negative terminal V2-. The first output pin ID1, the second output pin ID2, and the third output pin ID3 are connected to the bases of the first transistor Q1, the second transistor Q2, and the third transistor Q3 respectively through the ninth resistor R9, the tenth resistor R10, and the eleventh resistor R11. The emitters of the first transistor Q1, the second transistor Q2, and the third transistor Q3 are connected to the second negative terminal V2-. The collectors of the first transistor Q1, the second transistor Q2, and the third transistor Q3 are connected to the negative terminals of the three light-emitting modules respectively. The positive terminals of the three light-emitting modules are connected to the second positive terminal V2+. The three light-emitting modules are each composed of several LED beads D of corresponding light-emitting colors connected in series with resistors R, and their operating voltage is 220V, the same as the mains voltage. The signal input pin ID5 of the sub-controller microcontroller U4 of the first control unit on the light strip is connected to the total signal output pin DO of the main control microcontroller U2 through a resistor, and its signal output pin ID4 is connected to the signal input pin ID5 of the sub-controller microcontroller U4 of the next control unit through a resistor, and so on for subsequent control units. As can be seen from the above structure, multiple control units are connected in parallel to the live wire circuit L and the neutral wire circuit N. The lamp strip can be cut at will, and one or more control units can be used independently.

[0019] The working principle of this utility model is as follows: The first rectifier module DB1 converts AC mains power into 220V high-voltage DC power, which is output to the power chip U1. After being stepped down and filtered by the power chip U1, the high-voltage DC power is output as 5V DC power to power the main control microcontroller U2 and the RF receiver chip U3. The control mode of the main control microcontroller U2 can be controlled by the first button switch K1, the second button switch K2, or the remote control input module 4. The control commands of the main control microcontroller U2 are first transmitted to the sub-control microcontroller U4 of the first control unit on the light strip, and then transmitted sequentially through the sub-control microcontrollers U4 of each subsequent control unit. In addition, the sub-control microcontroller U4 can also have a built-in fixed control program. When the light strip is not connected to an external controller, its second rectifier module DB2 can be directly connected to the mains power, and the light strip can run the lighting effects according to the built-in control program; when the light strip is connected to an external controller, it will prioritize the execution of the external controller's commands, making the light strip more flexible in use.

[0020] This invention features a main control module whose microcontroller only issues control commands, allowing the sub-controllers of each control unit on the light strip to control the three light-emitting modules within that control unit. This simplifies the wiring of the light strip and enables the light-emitting modules of multiple control units to interact with each other, achieving lighting effects such as flowing water and color-changing effects. Furthermore, since the operating voltage of the light-emitting modules in the sub-control circuit is 220V, and the current is transmitted through the sub-control circuit using 220V high voltage, the voltage drop can be significantly reduced. A single controller can drive a higher power light strip with a longer length. Since there is no need to use wires to transmit current in the light strip, its manufacturing process is simple, production efficiency is high, and manufacturing cost is low.

[0021] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A master control circuit for a high-voltage color LED light strip, characterized in that: The system includes a first rectifier module, a power supply module, and a main control module. The input terminal of the first rectifier module is connected to AC mains power, and its output terminal is connected to the power supply module. The output terminal of the power supply module is connected to the main control module, which only outputs control commands. The first rectifier module is a surface-mount bridge rectifier, including two AC input terminals for connecting to AC mains power, a first positive terminal, and a first negative terminal. The power supply module includes a power chip, which has a positive terminal, a negative terminal, a positive output terminal, and a negative output terminal. The positive terminal of the power chip is connected to the first positive terminal through a first resistor. The negative terminal is connected to the first negative terminal, and the positive terminal of the power output is connected to the first negative terminal through a first diode and a first capacitor connected in parallel. The negative terminal of the power chip is connected to the positive terminal of the power output through a first inductor. The main control module includes a main control microcontroller, which includes a positive terminal, a negative terminal, a first mode terminal, a second mode terminal, and a main signal output terminal. The positive terminal is connected to the positive terminal of the power output of the power chip, and the negative terminal is connected to the first negative terminal. The first mode terminal and the second mode terminal are respectively connected to the first negative terminal through a first button switch and a second button switch.

2. The main control circuit for a high-voltage color LED light strip according to claim 1, characterized in that: The main control module further includes a zero-crossing detection module, and the main control microcontroller further includes a zero-crossing detection pin. The zero-crossing detection module includes an optocoupler. The receiver (C) terminal of the optocoupler is connected to the zero-crossing detection pin and is connected to the first negative terminal through a second capacitor. Its receiver (E) terminal is connected to the first negative terminal. Its transmitter (positive) terminal is connected to the input terminal of the first rectifier module through a second resistor and is connected to the first negative terminal through a second diode and a third resistor in parallel. Its transmitter (negative) terminal is connected to the first negative terminal.

3. The main control circuit for a high-voltage color LED strip according to claim 1, characterized in that: The main control module also includes a remote control input module, and the main control microcontroller also includes a third mode pin. The input terminal of the remote control input module is connected to the third mode pin.

4. The main control circuit for a high-voltage color LED strip according to claim 1, characterized in that: The main signal output pin of the main control microcontroller is also connected to the positive power output of the power chip through a positively connected third diode, and to the first negative terminal through a reversely connected fourth diode.

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