Sub-control circuit of high-voltage color LED lamp strip

Abstract

A sub-control circuit of a high-voltage color LED lamp strip comprises two live line circuits extending along the length direction of the lamp strip, a zero line circuit and a plurality of control units arranged along the length direction of the lamp strip, and each control unit comprises a second rectification module, a sub-control single-chip microcomputer and a plurality of light-emitting modules with working voltage equal to that of commercial power. The two input ends of the second rectification module are respectively connected to the live wire circuit and the zero line circuit, the output end of the second rectification module is connected to the sub-single-chip microcomputer and the multiple light-emitting modules, and the sub-control single-chip microcomputer respectively controls the multiple light-emitting modules in the control unit. The sub-control single-chip microcomputer of the first control unit on the lamp strip is used for receiving an external control instruction, and the external control instruction is sequentially transmitted through the sub-control single-chip microcomputers of the subsequent control units. The control circuit has the advantages of various control effects, simple manufacturing process, low circuit voltage drop and the like.

Description

Technical Field

[0001] This utility model relates to LED lighting circuits, specifically disclosing a sub-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] Based on this, it is necessary to provide a sub-control circuit for a color LED light strip that has a simple manufacturing process, high production efficiency, and low circuit voltage, addressing the problems of existing technologies.

[0004] To address the problems in existing technologies, this utility model discloses a sub-control circuit for a high-voltage color LED light strip, comprising two live wire circuits and a neutral wire circuit 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, a sub-control microcontroller, and multiple light-emitting modules with operating voltages equal to the mains power. The two input terminals of the second rectifier module are respectively connected to the live wire circuit and the neutral wire circuit, and its output terminal is connected to the sub-control microcontroller and the multiple light-emitting modules. The sub-control microcontroller controls the multiple light-emitting modules within its control unit. The sub-control microcontroller of the first control unit on the light strip is used to receive external control commands and transmit them sequentially through the sub-control microcontrollers of subsequent control units.

[0005] The beneficial effects of this utility model are as follows: Since the microcontroller of the first control unit on the light strip can accept external control commands and transmit them sequentially through the microcontrollers of each control unit, the microcontrollers of each control unit control the three light-emitting modules within that control unit. This allows the light-emitting modules of multiple control units on the light strip to respond to each other, achieving lighting effects such as flowing water and color-changing effects. Furthermore, since the working voltage of the light-emitting modules is 220V, the current in the sub-control circuit can be transmitted at high voltage, which can significantly reduce the voltage drop. A single controller can drive a higher power light strip and a longer light strip. There is no need to use wires to transmit current in the light strip, and the manufacturing process of the light strip is simple and the manufacturing cost is low.

[0006] As an improvement to this utility model: the second rectifier module is a surface-mount bridge rectifier, and its output terminals include a second positive terminal and a second negative terminal. The sub-controller includes a sub-controller chip positive terminal, a sub-controller chip negative terminal, a first output pin, a second output pin, a third output pin, a signal output pin, and a signal input pin. The multiple light-emitting modules include three light-emitting modules: a red light module, a green light module, and a blue light module. The sub-controller chip positive terminal is connected to the second positive terminal through a seventh resistor, and is connected to the second negative terminal through a fifth diode, a sixth capacitor, and an eighth resistor in parallel. The sub-controller chip negative terminal is connected to the second negative terminal. The first output pin, the second output pin, and the third output pin are respectively connected to the bases of the first transistor, the second transistor, and the third transistor through a ninth resistor, a tenth resistor, and an eleventh resistor. The emitters of the first, second, and third transistors are connected to the second negative terminal, and the collectors of the first, second, and third transistors 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. The signal input pin of the sub-controller microcontroller of the first control unit on the light strip is used to connect to an external control signal, and its signal output pin is connected to the signal input pin of the next control unit, and so on for subsequent control units. The sub-controller microcontroller has an independent control program. When its signal input pin receives an external control command, it executes the external control command first; otherwise, it runs according to the internal control program. The red, green, and blue light modules are composed of multiple red, green, and blue LED beads and several resistors connected in series, respectively, and their operating voltage is 220V. 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 working 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. 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. From the above structure, it can be seen that multiple control units are connected in parallel to the live wire circuit L and the neutral wire circuit N. Any one or more control units can be used independently by cutting any part of the light strip.

[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 sub-control circuit for a high-voltage color LED light strip, characterized in that: The system includes two live wire circuits and a neutral wire circuit 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, a sub-controller microcontroller, and multiple light-emitting modules with operating voltages equal to the mains power. The two input terminals of the second rectifier module are respectively connected to the live wire circuit and the neutral wire circuit, and its output terminal is connected to the sub-controller microcontroller and the multiple light-emitting modules. The sub-controller microcontroller controls the multiple light-emitting modules within its control unit. The sub-controller microcontroller of the first control unit on the light strip is used to receive external control commands and transmit them sequentially through the sub-controller microcontrollers of subsequent control units.

2. The sub-control circuit for a high-voltage color LED light strip according to claim 1, characterized in that: The second rectifier module is a surface-mount bridge rectifier, and its output terminals include a second positive terminal and a second negative terminal. The sub-controller microcontroller includes a sub-controller chip positive terminal, a sub-controller chip negative terminal, a first output pin, a second output pin, a third output pin, a signal output pin, and a signal input pin. The multiple light-emitting modules include three light-emitting modules: a red light module, a green light module, and a blue light module. The sub-controller chip positive terminal is connected to the second positive terminal through a seventh resistor, and is connected to the second negative terminal through a fifth diode, a sixth capacitor, and an eighth resistor in parallel. The sub-controller chip negative terminal is connected to the second negative terminal. The first output pin, the second output pin, the third output pin, and the fourth output pin are all connected in parallel. The output pins are connected to the bases of the first, second, and third transistors respectively via resistors nine, tenth, and eleventh. The emitters of the first, second, and third transistors are connected to the second negative terminal. The collectors of the first, second, and third transistors 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. The signal input pin of the sub-controller microcontroller of the first control unit on the light strip is used to connect to external control signals, and its signal output pin is connected to the signal input pin of the next control unit, and so on for subsequent control units.

3. The sub-control circuit for a high-voltage color LED light strip according to claim 2, characterized in that: The microcontroller has an independent control program. When its signal input pin receives an external control command, it will execute the external control command first; otherwise, it will run according to the internal control program.

4. The sub-control circuit for a high-voltage color LED light strip according to claim 2, characterized in that: The red light module, green light module, and blue light module are each composed of multiple red LED beads, green LED beads, and blue LED beads connected in series with several resistors, and their operating voltage is 220V.

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