Dynamic control circuit of LED lamp strip

Abstract

A dynamic control circuit of an LED lamp strip comprises a plurality of light-emitting modules, a rectification module and a single-chip microcomputer which are sequentially arranged in the length direction of a circuit board. Each light-emitting module comprises a plurality of light-emitting modules, the light-emitting modules with the same sequence among the light-emitting modules are sequentially connected in series to form a plurality of synchronous light-emitting modules with the working voltage equal to that of the mains supply, and the rectifier module converts the alternating-current mains supply into high-voltage direct current and outputs the high-voltage direct current to the synchronous light-emitting modules and the single-chip microcomputer. The single-chip microcomputer controls the lightening time and duration of the three synchronous light-emitting modules according to a set program, and the effect that the multiple light-emitting modules in each light-emitting module are lightened in sequence and flow water is achieved. According to the utility model, an external controller can be abandoned, the manufacturing process of the lamp strip is simple, the product is more convenient to use, and the application cost is lower.

Description

Technical Field

[0001] This utility model relates to LED lighting circuits, specifically disclosing a dynamic control circuit for an LED light strip. Background Technology

[0002] Dynamic control of LED light strips refers to the ability to independently control the light-emitting units on the strip, creating interactive lighting effects such as flowing water or jumping patterns; this is also known in the industry as a "running light strip." Current running light strips generally use external controllers. Each light-emitting unit on the strip requires a control chip, and at least three lines are needed for positive and negative power supplies and signal lines. This results in complex circuitry and high manufacturing costs. Furthermore, consumers need to configure an external controller for use, which is inconvenient and costly. Utility Model Content

[0003] Therefore, it is necessary to provide a dynamic control circuit for LED light strips that is simple to manufacture, easy to use, and low in cost, addressing the problems of existing technologies.

[0004] To address the problems of existing technologies, this utility model discloses a dynamic control circuit for an LED light strip, comprising multiple light-emitting modules arranged sequentially along the length of the light strip, a rectifier module, and a microcontroller. Each light-emitting module includes several light-emitting modules arranged sequentially along the length of the circuit board. Light-emitting modules with the same order are connected in series to form several synchronous light-emitting modules with an operating voltage equal to that of the mains power. The rectifier module has two input terminals for connecting to the mains power, and its output terminals include a positive power supply terminal and a negative power supply terminal. The microcontroller includes a positive terminal, a negative terminal, a signal input terminal, and a number of input terminals equal to the synchronous light-emitting modules. The system has several output pins. The positive pin is connected to the positive terminal of the power supply through a first resistor and to the negative terminal of the power supply through a first diode and a first capacitor connected in parallel. The negative pin is connected to the negative terminal of the power supply. The output pins are respectively connected to the bases of several transistors. The emitters of the transistors are connected to the negative terminal of the power supply. The collectors of the transistors are respectively connected to the negative terminals of several synchronous light-emitting modules. The positive terminals of the synchronous light-emitting modules are connected to the positive terminal of the power supply. The signal input pin is connected to the positive terminal of the power supply through a second resistor and to the negative terminal of the power supply through a third resistor and a second capacitor connected in parallel.

[0005] The beneficial effects of this utility model are as follows: Since the circuit and microcontroller are set on the circuit board of the light strip, the microcontroller controls the sequential lighting of several light-emitting modules in multiple light-emitting modules through several output pins of the microcontroller, realizing the dynamic control effect of flowing water. The external controller can be eliminated, the application cost is lower, and the use is more convenient. At the same time, only two current wires need to be set in the core wire to connect to the circuit board, making the circuit board wiring simpler and the manufacturing cost of the light strip lower.

[0006] As an improvement to this invention: the light-emitting module comprises three light-emitting modules, which are connected in series with the same order to form three synchronous light-emitting modules. The microcontroller includes three output pins, and there are three transistors. Each light-emitting module is composed of several LED beads and resistors connected in series, and its operating voltage is 220V. Attached Figure Description

[0007] Figure 1 This is a circuit diagram of a dynamic control circuit according to the present invention.

[0008] Figure 2 This is a structural schematic diagram of the LED light strip 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 An LED light strip includes an outer sheath 1, inside which a core wire 2 is wrapped, and two power wires 21 are disposed in the core wire 2. Multiple circuit boards 3 are wrapped inside the core wire 2, and LED beads 4 are disposed on the circuit boards 3. The circuit boards 3 are electrically connected to the two power wires 21 through two leads 5.

[0011] refer to Figure 2 The circuit board 3 is equipped with a dynamic control circuit, which includes multiple light-emitting modules 40 arranged along the length of the light strip, a rectifier module DB, and a microcontroller U.

[0012] The light-emitting module 40 includes a first light-emitting module 41, a second light-emitting module 42, and a third light-emitting module 43 arranged sequentially along the length of the circuit board. Light-emitting modules of the same order within each light-emitting module 40 are connected in series to form multiple synchronous light-emitting modules. Specifically, the first light-emitting modules 41 of each light-emitting module are connected in series to form a first synchronous light-emitting module 4a; the second light-emitting modules 42 of each light-emitting module 40 are connected in series to form a second synchronous light-emitting module 4b; and the third light-emitting modules 43 of each light-emitting module 40 are connected in series to form a third synchronous light-emitting module 4c. Each light-emitting module 41 / 42 / 43 can be a single LED or multiple LEDs 4 connected in series with several resistors R, and its operating voltage is 220V, the same as the mains voltage.

[0013] The rectifier module DB is a surface-mount bridge rectifier. Its input is connected to the two power supply wires, and its output includes a positive power supply V+ and a negative power supply V-. The microcontroller U includes a positive pin VCC, a negative pin GND, a first output pin ID1, a second output pin ID2, a third output pin ID3, and a signal input pin ID5. The positive pin VCC is connected to the positive power supply V+ through a first resistor R1, and to the negative power supply V- through a first diode D1 and a first capacitor C1 connected in parallel. The negative pin GND is connected to the negative power supply V-. The first output pin ID1, the second output pin ID2, and the third output pin ID3 are respectively connected to the bases of the first transistor Q1, the second transistor Q2, and the third transistor Q3. The emitters of the first transistor Q1, the second transistor Q2, and the third transistor Q3 are connected to the negative power supply V-. The collectors of the first transistor Q1, the second transistor Q2, and the third transistor Q3 are respectively connected to the negative terminals of the first synchronous light-emitting module 4a, the second synchronous light-emitting module 4b, and the third synchronous light-emitting module 4c. The positive terminals of the synchronous light-emitting modules are connected to the positive terminal V+ of the power supply. The signal input pin ID5 is connected to the positive terminal V+ of the power supply through the second resistor R2, and simultaneously connected to the negative terminal V- of the power supply through the parallel third resistor R3 and the second capacitor C2. The second resistor R2 and the third resistor R3 provide the voltage division ratio, and the second capacitor C2 provides the output signal of the rectifier module DB. The signal input pin ID5 synchronizes the dynamic control circuits on the multi-segment circuit board by detecting the charging and discharging signal of the second capacitor C2.

[0014] The working principle of this utility model is as follows: The rectifier module DB converts the AC mains power into 220V high-voltage DC power, which is output to the first synchronous light-emitting module 4a, the second synchronous light-emitting module 4b and the third synchronous light-emitting module 4c. At the same time, after being divided by the first resistor R1, the output is sent to the microcontroller U for operation. The microcontroller U controls the lighting timing and duration of the three synchronous light-emitting modules according to the set program, so as to realize the sequential lighting effect. Specifically: when the microcontroller U controls the first synchronous light-emitting module 4a to light up, the first light-emitting module 41 in each light-emitting module 40 lights up; when the microcontroller U controls the second synchronous light-emitting module 4b to light up, the second light-emitting module 42 in each light-emitting module 40 lights up; when the microcontroller U controls the third synchronous light-emitting module 4c to light up, the third light-emitting module 43 in each light-emitting module 40 lights up; when the microcontroller U controls the first synchronous light-emitting module 4a to light up again, the first light-emitting module 4 in each light-emitting module 40 lights up again. The overall visual effect of the light strip is as if it jumps from the third light-emitting module 43 of the previous light-emitting module to the first light-emitting module 41 of the next light-emitting module, forming a continuous flowing effect.

[0015] As a specific application of the above circuit: A circuit board 3 is installed every meter within the light strip. Each circuit board 3 contains one of the aforementioned dynamic control circuits. The dynamic control circuit includes a surface-mount bridge rectifier DB, a microcontroller U, and 120 LED beads 4 operating at 3V. The LED beads 4 are arranged sequentially along the length of the circuit board. Every four consecutive LED beads 4 and a resistor R are connected in series to form a light-emitting module 41 / 42 / 43. Every three consecutive light-emitting modules form a light-emitting module 40. Light-emitting modules 41 / 42 / 43 with the same sequence are connected in series among the light-emitting modules 40 to form three synchronous light-emitting modules 4a / 4b / 4c. The circuit board 3 is connected to two power wires 21 on the core wire 2 via leads 5. Mains power is connected to the input terminal of the surface-mount bridge rectifier through the wires 21, leads 5, and the circuit on the circuit board 1. Each section of the circuit board 3 is connected in parallel to the power wires 21. A light strip containing one or more sections of the circuit board 3 can be cut and connected to mains power for use. Power supply wire 21 is used as the main power supply line for the multi-segment circuit board. Its large cross-section reduces resistance, power consumption, and circuit voltage drop, resulting in more uniform overall brightness of the light strip. The above explanation uses three output pins on the microcontroller as an example. As those skilled in the art will know, when more output pins are set on the microcontroller U, more synchronous light-emitting modules can be set accordingly, resulting in more delicate control and a more realistic flowing effect.

[0016] This invention incorporates a circuit and a microcontroller on the LED strip circuit board. The microcontroller's output pins control the sequential lighting of multiple light-emitting modules within multiple light-emitting modules, achieving a dynamic, flowing control effect. This eliminates the need for an external controller, resulting in lower application costs and greater ease of use. Furthermore, only two current wires are required in the core wire to connect to the circuit board, simplifying circuit board wiring and reducing LED strip manufacturing costs.

[0017] 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 dynamic control circuit for an LED light strip, characterized in that: The system includes multiple light-emitting modules arranged sequentially along the length of the light strip, a rectifier module, and a microcontroller. Each light-emitting module includes several light-emitting modules arranged sequentially along the length of the circuit board. The light-emitting modules with the same order are connected in series to form several synchronous light-emitting modules with the same operating voltage as the mains power. The two input terminals of the rectifier module are used to connect to the mains power, and its output terminals include a positive power supply terminal and a negative power supply terminal. The microcontroller includes a positive terminal, a negative terminal, a signal input terminal, and several output terminals equal in number to the synchronous light-emitting modules. The positive terminal is connected to the positive power supply terminal through a first resistor and to the negative power supply terminal through a first diode and a first capacitor connected in parallel. The negative terminal is connected to the negative power supply terminal. The several output terminals are respectively connected to the bases of several transistors. The emitters of the transistors are connected to the negative power supply terminal. The collectors of the transistors are respectively connected to the negative terminals of the several synchronous light-emitting modules. The positive terminals of the synchronous light-emitting modules are connected to the positive power supply terminal. The signal input terminal is connected to the positive power supply terminal through a second resistor and to the negative power supply terminal through a third resistor and a second capacitor connected in parallel.

2. The dynamic control circuit for an LED light strip according to claim 1, characterized in that: The light-emitting module includes three light-emitting modules, and the light-emitting modules with the same order are connected in series to form three synchronous light-emitting modules. The microcontroller includes three output pins, and there are three transistors.

3. The dynamic control circuit for an LED light strip according to claim 2, characterized in that: The light-emitting module consists of several LED beads and resistors connected in series, and its operating voltage is 220V.

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