LED lamp synchronous control circuit

Abstract

The utility model relates to an LED lamp synchronous control circuit and method, belongs to the technical field of lamp control, synchronous control among LED lamps is carried out through IO ports of original MCUs of the LED lamps, a control system does not need to be additionally arranged on an LED lamp system to control synchronous flicker among a plurality of LED lamps, the control cost of the system on the LED lamps is reduced, and the control efficiency is improved. And the installation mode and the installation space of the LED lamp are simplified.

Description

Technical Field

[0001] This utility model belongs to the field of lighting control technology, specifically relating to an LED lamp synchronization control circuit. Background Technology

[0002] Heavy vehicles or construction machinery require multiple side marker lights or other signal lights for activation during turns or other warning situations, and the flashing of these lights needs to be synchronized. Existing common solutions generally fall into two categories: connecting all LED lights to a central control box for unified control; and having each LED light have its own independent communication cable. The former is more expensive and complex to install; the latter is also more expensive and requires communication with the vehicle's central control system or a built-in communication controller, making installation and operation more complex and hindering product miniaturization. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an LED lamp synchronization control circuit.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] An LED lamp synchronization control circuit includes an LED lamp module, wherein the LED lamp module includes a control module and LED lamps;

[0006] The control module includes a control pin and a synchronization pin. The LED is electrically connected to the control pin. The control module outputs a control signal through the control pin to control the switching of the LED. Multiple synchronization pins of the control module are connected in series. The control module outputs and receives a pulse signal through the synchronization pin to reset the blinking cycle of the LED.

[0007] According to some embodiments of the present invention, a constant current driving module is also included, which is connected between the control pin and the LED, and is used to provide operating voltage to the LED.

[0008] According to some embodiments of this utility model, it also includes:

[0009] The constant current drive module includes a drive chip, a power supply, and a switching component.

[0010] The driver chip has its signal input terminal connected to the control pin of the control module to receive the control signal output by the control module; the driver chip's signal output terminal is connected to the switch assembly and outputs a potential signal to the switch assembly according to the received control signal.

[0011] The power supply is connected to the positive terminal of the LED light;

[0012] The first port of the switch assembly is connected to the signal output terminal of the driver chip, the second port of the switch assembly is connected to the negative terminal of the LED, and the third port of the switch assembly is grounded. When a high-level signal is input to the first port of the switch assembly, the second port and the third port of the switch assembly are connected. When a low-level signal is input to the first port of the switch assembly, the second port and the third port of the switch assembly are cut off.

[0013] According to some embodiments of this utility model, the switching component is a PMOS transistor.

[0014] According to some embodiments of this utility model, it also includes:

[0015] The first inductor has its two ends connected between the negative terminal of the LED and the second port of the switching assembly, respectively.

[0016] The positive terminal of the fifth diode is connected to the second port of the switching assembly, and the negative terminal of the fifth diode is connected to the positive terminal of the LED.

[0017] According to some embodiments of this utility model, it further includes a sixth diode, a fourth capacitor, a fifth capacitor, and a sixth capacitor, the two ends of which are connected in series with the positive and negative terminals of the power supply, and the negative terminal of the sixth diode is closer to the positive terminal of the power supply.

[0018] According to some embodiments of this utility model, it also includes a fourth resistor, and the sixth diode, the fifth capacitor and the sixth capacitor are all connected to the positive terminal of the power supply through the fourth diode, and the positive terminal of the fourth diode is connected to the positive terminal of the power supply.

[0019] According to some embodiments of this utility model, the sixth diode is an electrolytic diode, the sixth capacitor is a polarized capacitor, and the positive terminal of the sixth capacitor is the end connected to the positive terminal of the power supply.

[0020] According to some embodiments of this utility model, it also includes a first resistor, a second resistor, and a third resistor. The third resistor, the second resistor, and the first resistor are connected in series outside the synchronization pin. The connection between the second resistor and the third resistor is also grounded through a second diode, with the positive terminal of the second diode being the ground terminal. The connection between the first resistor and the second resistor is also grounded through a first diode, with the positive terminal of the first diode being the ground terminal.

[0021] According to some embodiments of this utility model, the synchronization pin is the I / O port of the control module.

[0022] This utility model has at least the following technical effects: it enables synchronous control between LED lights through the IO ports of the original MCU of the LED lights, eliminating the need to set up an additional control system on the LED lights system to control the synchronous flashing of multiple LED lights, reducing the system's control cost for LED lights, and simplifying the installation method and installation space of LED lights. Attached Figure Description

[0023] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 This is a block diagram of an LED lamp provided in one embodiment of the present invention;

[0025] Figure 2 This is a diagram showing the connection method of an LED lamp in one embodiment of the present invention;

[0026] Figure 3 This is a circuit diagram of the control module provided in one embodiment of the present invention;

[0027] Figure 4 This is a circuit diagram of a constant current drive module provided in one embodiment of the present invention;

[0028] Reference numerals: U1, Control module; U2, Driver chip; Q1, PMOS transistor; L1, First inductor; D1, First diode; D2, Second diode; D3, Third diode; D4, Fourth diode; D5, Fifth diode; TVS1, Sixth diode; C1, First capacitor; C2, Second capacitor; C3, Third capacitor; C4, Fourth capacitor; C5, Fifth capacitor; C6, Sixth capacitor; C7, Seventh capacitor; C8, Eighth capacitor; C9, Ninth capacitor; C10, Tenth capacitor; R1, First resistor; R2, Second resistor; R3, Third resistor; R4, Fourth resistor; R5, Fifth resistor; R6, Sixth resistor. Detailed Implementation

[0029] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0030] Please refer to Figure 1-3 In one embodiment, this utility model provides an LED lamp synchronization control circuit, including an LED lamp module, which includes a control module U1 and LED lamps;

[0031] The control module U1 includes a control pin and a synchronization pin. The LED is electrically connected to the control pin. The control module U1 outputs control signals through the control pin to control the switching of the LED. The synchronization pins of multiple control modules U1 are connected in series. The control module U1 outputs and receives pulse signals through the synchronization pin to reset the blinking cycle of the LED.

[0032] The fourth pin of control module U1 is the synchronization pin, and the fifth pin is the control pin. A current-limiting resistor R5 is also connected to the fifth pin of control module U1, and the control signal is output externally through resistor R5. Please refer to [reference needed] for details. Figure 3 .

[0033] In this embodiment, one pin of the control MCU in a conventional LED light group is used as a synchronization pin, serving as both a synchronization signal output port and a synchronization signal detection port. The synchronization pins of multiple LED light MCUs are connected in series. When the MCU of the first LED light is powered on, it first sets the internal synchronization pin to output mode and outputs a pulse signal to the outside through the synchronization pin. Then, the MCU of the first LED light controls the internal synchronization pin to input mode and controls the first LED light to blink according to a preset blinking period and blinking frequency. During the blinking process of the first LED light, when the MCU of the first LED light receives a pulse signal from the output of other LED lights, it resets the blinking period of the first LED light, thereby realizing the synchronous blinking of multiple LED lights.

[0034] In some embodiments of this utility model, LEDs controlled by multiple LED lighting modules flash at the same frequency, and LEDs controlled by multiple LED lighting modules that are not turned on at the same time are switched on and off simultaneously through a synchronization pin.

[0035] In some embodiments of this utility model, LEDs controlled by multiple LED lighting modules flash periodically at different frequencies. Through a synchronization pin, the LEDs controlled by multiple LED lighting modules that are not turned on at the same time can all start flashing simultaneously from the beginning of their flashing cycle.

[0036] In a further embodiment of this utility model, a constant current driving module is also included. The constant current driving module is connected between the control pin and the LED lamp and is used to provide the LED lamp with operating voltage.

[0037] In this embodiment, the constant current drive module provides a stable operating voltage for the LED lamp, thereby ensuring the normal operation and long lifespan of the LED lamp.

[0038] Please refer to Figure 4 In a further embodiment of this utility model, it further includes:

[0039] The constant current drive module includes a driver chip U2, a power supply, and a switching component.

[0040] The driver chip U2 has its signal input terminal connected to the control pin of the control module U1 to receive the control signal output by the control module U1; the signal output terminal of the driver chip U2 is connected to the switching component and outputs a potential signal to the switching component according to the received control signal.

[0041] The power supply is connected to the positive terminal of the LED light;

[0042] The first port of the switch assembly is connected to the signal output terminal of the driver chip U2, the second port of the switch assembly is connected to the negative terminal of the LED, and the third port of the switch assembly is grounded. When a high-level signal is input to the first port of the switch assembly, the second and third ports of the switch assembly are connected. When a low-level signal is input to the first port of the switch assembly, the second and third ports of the switch assembly are cut off.

[0043] In this embodiment, the constant current drive module controls the switching assembly to turn on and off according to the control signal output by the control module U1, thereby achieving precise control of the LED power supply. The third pin of the drive chip U2 is a signal input terminal, connected to the control pin of the control module U1, used to receive the control signal from the control module U1. The fifth pin of the drive chip U2 is a signal output terminal, and outputs a potential signal to the switching assembly according to the control signal U1, controlling the switching assembly to turn on and off. When the switching assembly connects the second port and the third port, the LED light is powered on and illuminates normally. When the switching assembly is disconnected, and the second port and the third port of the switching assembly are cut off, the LED light is powered off.

[0044] In a further embodiment of this utility model, the control signal is a PWM signal, and the control module U1 can change the flashing mode of the LED light by changing the frequency and duty cycle of the PWM signal.

[0045] It is understandable that the control relationship between the control module U1 and the driver chip U2 can be as follows: when the driver chip U2 receives a high-level signal from the control module U1, it outputs a high-level signal to the switching component to control the LED to light up; when the driver chip U2 receives a low-level signal from the control module U1, it outputs a low-level signal to the switching component to control the LED to turn off.

[0046] Of course, the control relationship between the control module U1 and the driver chip U2 can also be as follows: when the driver chip U2 receives a low-level signal from the control module U1, it outputs a high-level signal to the switching component to control the LED to light up; when the driver chip U2 receives a high-level signal from the control module U1, it outputs a low-level signal to the switching component to control the LED to turn off.

[0047] In a further embodiment of this utility model, the switching component is a PMOS transistor Q1.

[0048] In this embodiment, the gate of PMOS transistor Q1 is the first port of the switching component, the drain of PMOS transistor is the second port of the switching component, and the source of PMOS transistor is the third port of the switching component.

[0049] In a further embodiment of this utility model, it also includes:

[0050] The first inductor L1 has its two ends connected between the negative terminal of the LED and the second port of the switch assembly, respectively.

[0051] The positive terminal of the fifth diode D5 is connected to the second port of the switching assembly, and the negative terminal of the fifth diode D5 is connected to the positive terminal of the LED.

[0052] In this embodiment, the addition of the first inductor L1 and the fifth diode D5 further improves the circuit's anti-interference capability and stability; the first inductor L1 can suppress power line interference and buffer the LED's power-on and power-off states; the fifth diode D5 can prevent current backflow, protect the circuit from damage, and improve the circuit's lifespan.

[0053] In a further embodiment of this utility model, it also includes a sixth diode TVS1, a fourth capacitor C4, a fifth capacitor C5 and a sixth capacitor C6. The two ends of the sixth diode TVS1, the fourth capacitor C4, the fifth capacitor C5 and the sixth capacitor C6 are connected in series with the positive and negative terminals of the power supply, and the negative terminal of the sixth diode TVS1 is the end closest to the positive terminal of the power supply.

[0054] In this embodiment, the constant current drive module is also equipped with a fourth capacitor C4, a fifth capacitor C5 and a sixth capacitor C6 for filtering and decoupling, and a sixth diode TVS1 is provided to absorb instantaneous high voltage.

[0055] The constant current drive module also includes a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, and a sixth resistor R6. The sixth resistor R6 is the sampling resistor for the driver chip U2; one end is connected to the power supply and the first pin of the driver chip U2, while the other end is connected to the second pin of the driver chip U2 and the positive terminal of the LED. The seventh capacitor C7 is connected to the positive and negative terminals of the LED. One end of the eighth capacitor C8 is connected to the positive terminal of the power supply, and the other end is grounded. One end of the ninth capacitor C9 is connected to the sixth pin of the driver chip U2, and the other end is grounded. One end of the tenth capacitor C10 is connected to the third pin of the driver chip U2, i.e., the signal input terminal of the driver chip U2, and the other end is grounded. The seventh, eighth, ninth, and tenth capacitors C7, C8, C9, and C10 are all used for filtering and decoupling.

[0056] In a further embodiment of this utility model, a fourth resistor is also included. The sixth diode TVS1, the fifth capacitor C5, and the sixth capacitor C6 are all connected to the positive terminal of the power supply through the fourth diode D4, and the positive terminal of the fourth diode D4 is connected to the positive terminal of the power supply.

[0057] In this embodiment, the constant current drive module is also provided with a fourth diode D4. The positive terminal of the fourth diode D4 is connected to the positive terminal of the power supply to prevent damage to the circuit components caused by reversing the positive and negative terminals of the power supply during installation.

[0058] In a further embodiment of this utility model, the sixth diode TVS1 is an electrolytic diode, the sixth capacitor C6 is a polarized capacitor, and the positive terminal of the sixth capacitor C6 is the end connected to the positive terminal of the power supply.

[0059] In a further embodiment of this utility model, it also includes a first resistor R1, a second resistor R2, and a third resistor R3. The third resistor R3, the second resistor R2, and the first resistor R1 are connected in series outside the synchronization pin. The connection between the second resistor R2 and the third resistor R3 is also grounded through a second diode D2, with the positive terminal of the second diode D2 being the ground terminal. The connection between the first resistor R1 and the second resistor R2 is also grounded through a first diode D1, with the positive terminal of the first diode D1 being the ground terminal.

[0060] In this embodiment, in order to prevent the synchronization pin of the control module U1 from being accidentally connected to the power interface during system wiring, which would damage the control module U1, a third resistor R3, a second resistor R2, and a first resistor R1 are connected in series outside the synchronization pin. This can effectively limit the amount of current flowing into the synchronization pin and prevent the synchronization pin from being damaged by excessive current.

[0061] In a further embodiment of this utility model, it also includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a third diode D3, and a fourth resistor D4. The first pin of the control module U1 is connected to a 5V voltage source at its positive terminal, and the eighth pin of the control module U1 is connected to the power supply ground at its ground terminal. The two ends of the second capacitor C2 and the third capacitor C3 are respectively connected to the first pin and the eighth pin of the control module U1. The second pin of the control module U1 is connected to the 5V voltage source through the fourth resistor R4. The second pin of the control module U1 is also connected to the power supply ground through the third diode D3. The negative terminal of the third diode D3 is close to the end of the second pin of the control module U1. The two ends of the first capacitor C1 are respectively connected to the positive and negative terminals of the third diode D3.

[0062] In a further embodiment of this utility model, the synchronization pin is the I / O port of the control module U1.

[0063] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An LED lamp synchronization control circuit, characterized in that, It includes an LED lighting module, which includes a control module (U1) and LED lights; The control module (U1) includes a control pin and a synchronization pin. The LED is electrically connected to the control pin. The control module (U1) outputs control signals through the control pin to control the switching of the LED. The synchronization pins of multiple control modules (U1) are connected in series. The control module (U1) outputs and receives pulse signals through the synchronization pin to reset the blinking cycle of the LED.

2. The LED lamp synchronization control circuit according to claim 1, characterized in that, It also includes a constant current drive module, which is connected between the control pin and the LED, and is used to provide operating voltage to the LED.

3. The LED lamp synchronization control circuit according to claim 2, characterized in that, Also includes: The constant current drive module includes a drive chip (U2), a power supply, and a switching component. The driver chip (U2) has its signal input terminal connected to the control pin of the control module (U1) and receives the control signal output by the control module (U1); the driver chip (U2) has its signal output terminal connected to the switch assembly and outputs a potential signal to the switch assembly according to the received control signal. The power supply is connected to the positive terminal of the LED light; The first port of the switch assembly is connected to the signal output terminal of the driver chip (U2), the second port of the switch assembly is connected to the negative terminal of the LED, and the third port of the switch assembly is grounded. When a high-level signal is input to the first port of the switch assembly, the second port and the third port of the switch assembly are connected. When a low-level signal is input to the first port of the switch assembly, the second port and the third port of the switch assembly are cut off.

4. The LED lamp synchronization control circuit according to claim 3, characterized in that, The switching component is a PMOS transistor (Q1).

5. The LED lamp synchronization control circuit according to claim 3, characterized in that, Also includes: The first inductor (L1) has its two ends connected between the negative terminal of the LED and the second port of the switching assembly. The positive terminal of the fifth diode (D5) is connected to the second port of the switching assembly, and the negative terminal of the fifth diode (D5) is connected to the positive terminal of the LED.

6. The LED lamp synchronization control circuit according to claim 3, characterized in that, It also includes a sixth diode (TVS1), a fourth capacitor (C4), a fifth capacitor (C5), and a sixth capacitor (C6). The two ends of the sixth diode (TVS1), the fourth capacitor (C4), the fifth capacitor (C5), and the sixth capacitor (C6) are connected in series with the positive and negative terminals of the power supply. The negative terminal of the sixth diode (TVS1) is closer to the positive terminal of the power supply.

7. The LED lamp synchronization control circuit according to claim 6, characterized in that, It also includes a fourth diode (D4), and the sixth diode (TVS1), the fifth capacitor (C5) and the sixth capacitor (C6) are all connected to the positive terminal of the power supply through the fourth diode (D4), with the positive terminal of the fourth diode (D4) being connected to the positive terminal of the power supply.

8. The LED lamp synchronization control circuit according to claim 6, characterized in that, The sixth diode (TVS1) is an electrolytic diode, and the sixth capacitor (C6) is a polarized capacitor. The positive terminal of the sixth capacitor (C6) is connected to the positive terminal of the power supply.

9. The LED lamp synchronization control circuit according to claim 1, characterized in that, It also includes a first resistor (R1), a second resistor (R2), and a third resistor (R3). The third resistor (R3), the second resistor (R2), and the first resistor (R1) are connected in series outside the synchronization pin. The connection between the second resistor (R2) and the third resistor (R3) is also grounded through a second diode (D2), with the positive terminal of the second diode (D2) being the ground terminal. The connection between the first resistor (R1) and the second resistor (R2) is also grounded through a first diode (D1), with the positive terminal of the first diode (D1) being the ground terminal.

10. The LED lamp synchronization control circuit according to claim 1, characterized in that, The synchronization pin is the I / O port of the control module (U1).

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