LED constant-current carrier dimming device with double-path light switching function

Abstract

The utility model belongs to the technical field of LED lamp illumination, and discloses an LED constant current carrier wave dimming device with a double-path light switching function, which comprises a direct current power supply, a constant current carrier wave dimming control circuit, a main power supply line, an LED constant current driving circuit and an LED lamp loop, the number of the LED constant-current driving circuits is multiple, and each LED constant-current driving circuit is connected to the main power supply line. Each LED constant-current driving circuit is provided with two paths of outputs, and each path of output is connected with one path of LED lamp loop capable of emitting LED light with different colors; the two LED lamp loops under each LED constant-current driving circuit are independently controlled; the constant-current carrier dimming control circuit is additionally provided with a switching value acquisition circuit, and light switching control of two LED lamp loops under the same LED constant-current driving circuit is realized according to switching value state changes. According to the utility model, the switching control function of double-path light is realized.

Description

Technical Field

[0001] This utility model belongs to the field of LED lighting technology, and specifically relates to an LED constant current carrier dimming device with dual-channel light switching function. Background Technology

[0002] LED lighting technology has important applications in the current aquaculture industry. Under normal lighting conditions, one color of light, such as white light or warm light, is used, while in some special cases, another color of light, such as blue light, is used.

[0003] Under the currently prevalent 48V DC power supply, there are generally two ways to achieve light switching:

[0004] Option 1: Reverse voltage polarity, with two colors of LEDs connected in parallel and having opposite polarities. Under normal power supply, the warm light illuminates; after polarity reversal, the blue light illuminates. For example... Figure 7 As shown.

[0005] This solution is generally used in traditional voltage regulation and dimming solutions. Its disadvantages are that there is a difference in brightness between the front and back ends due to line voltage drop, and there is no gradual dimming and brightening process when switching between the two lights.

[0006] Option 2: Use a three-wire power supply. The two colors of LED beads share one pole, while the other pole is powered by two separate wires. For example... Figure 8 As shown, the disadvantage of this scheme is that it uses three power lines, which results in higher costs.

[0007] Patent document 1 discloses an LED lamp dimming device that effectively ensures consistent LED lamp current and consistent LED lamp brightness when there is a voltage drop in the entire circuit and the input voltage of each LED lamp is inconsistent.

[0008] However, patent document 1 can only achieve single-channel LED lighting. Therefore, it is crucial to propose a constant current carrier dimming device with dual-channel light switching function to achieve the objectives mentioned above.

[0009] Related literature

[0010] Patent Document 1: Chinese Utility Model Patent Authorization Announcement No.: CN219372632U, Announcement Date: 2023.07.18. Utility Model Content

[0011] The purpose of this invention is to propose an LED constant current carrier dimming device with dual-channel light switching function. Based on the traditional LED light dimming device, an additional LED light output is added to realize the switching control function of two types of lights.

[0012] To achieve the above objectives, this utility model adopts the following technical solution:

[0013] An LED constant current carrier dimming device with dual-channel lighting switching function includes a DC power supply, a constant current carrier dimming control circuit, a main power supply line, an LED constant current drive circuit, and an LED lamp circuit.

[0014] There are multiple LED constant current drive circuits, and each LED constant current drive circuit is connected to the main power supply line.

[0015] Each LED constant current drive circuit has two outputs, and each output is connected to an LED circuit that can emit LED light of different colors; the two LED circuits under each LED constant current drive circuit are independently controlled.

[0016] The constant current carrier dimming control circuit is equipped with a switch quantity acquisition circuit, wherein the switching control of two LED lamp circuits under the same LED constant current drive circuit is realized based on the switch quantity state change of the switch quantity acquisition circuit.

[0017] Preferably, the constant current carrier dimming control circuit includes a power conversion circuit, an input signal conversion circuit, a main control circuit, a switch quantity acquisition circuit, and a MOS drive circuit; wherein, the main control circuit includes a first microcontroller;

[0018] The switch signal acquisition circuit includes a light switching control switch and a pull-up resistor;

[0019] One end of the lighting switching control switch is connected to +5V via a pull-up resistor, and the other end is connected to the signal acquisition port of the first microcontroller.

[0020] Preferably, the LED constant current driving circuit includes a second microcontroller power supply circuit, a square wave signal conversion circuit, a second microcontroller, and a constant current power conversion circuit; the constant current power conversion circuit includes two sets of first and second constant current power conversion circuits.

[0021] The second microcontroller has two PWM signal output terminals, and each PWM signal output terminal is connected to one of the constant current power conversion circuits. Each constant current power conversion circuit is connected to one LED circuit.

[0022] This utility model has the following advantages:

[0023] As described above, this invention proposes an LED constant current carrier dimming device with dual-channel light switching function. Building upon the traditional LED constant current carrier dimming device that addresses the brightness difference between the front and rear ends, this device further adds an LED output channel. By adding a switching quantity acquisition circuit to the constant current carrier dimming control circuit, it achieves light switching control for two different color LED circuits under the same LED constant current drive circuit based on changes in the switching quantity state. Furthermore, this invention can also ensure consistent current for each LED even when there is a voltage drop across the entire line and inconsistent input voltages for each LED, thus guaranteeing consistent brightness across the entire line. Attached Figure Description

[0024] Figure 1 This is a structural diagram of an LED constant current carrier dimming device with dual-channel light switching function in an embodiment of this utility model;

[0025] Figure 2 A schematic diagram showing the addition of a switching quantity acquisition circuit to the constant current carrier dimming control circuit in this embodiment of the present invention;

[0026] Figure 3 This is a control circuit diagram of the second microcontroller in the LED constant current carrier drive circuit of this utility model embodiment;

[0027] Figure 4 This is a schematic diagram of the square wave signal conversion circuit in the LED constant current carrier drive circuit of this utility model embodiment;

[0028] Figure 5 This is a schematic diagram of the first constant current power conversion circuit in the LED constant current carrier drive circuit of this utility model embodiment;

[0029] Figure 6 This is a schematic diagram of the second constant current power conversion circuit in the LED constant current carrier drive circuit of this utility model embodiment;

[0030] Figure 7 This is a schematic diagram of the switching between warm light and blue light in the existing technical solution 1;

[0031] Figure 8 This is a schematic diagram of the switching between warm light and blue light in the existing technical solution 2;

[0032] Among them, 1-DC power supply, 2-main power supply line, 3-LED lamp circuit, 4-sub-power supply line, 5-constant current carrier dimming control circuit, 6-LED constant current drive circuit, 7-light switching control switch, and 8-pull-up resistor. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0034] Example

[0035] This embodiment describes an LED constant current carrier dimming device with dual-channel light switching function. Based on the structure of the traditional LED constant current carrier dimming device, this device further realizes the function of switching between two channels of light.

[0036] like Figure 1 As shown, the LED constant current carrier dimming device with dual-channel light switching function in this embodiment includes a DC power supply 1, a main power supply line 2, a constant current carrier dimming control circuit 5, an LED constant current drive circuit 6, and an LED lamp circuit 3.

[0037] Multiple sub-power supply lines 4 are drawn from the main power supply line 2. There are multiple LED constant current drive circuits 6, and each LED constant current drive circuit 6 is located on one of the sub-power supply lines 4 and connected to the main power supply line 2.

[0038] Each LED constant current driver circuit 6 has two outputs, and each output is connected to an LED circuit 3 that can emit LED light of different colors, for example... Figure 1 The LED1 lamp circuit and the LED2 lamp circuit are included.

[0039] The LED1 and LED2 circuits display different colors after being lit. The two LED circuits under each LED constant current drive circuit 6 are independently controlled, meaning their lighting states are controlled separately.

[0040] like Figure 2 As shown, the constant current carrier dimming control circuit is equipped with a switch quantity acquisition circuit. By changing the switch quantity state, the light switching control of two LED lamp circuits under the same LED constant current drive circuit can be realized.

[0041] The constant current carrier dimming control circuit includes a power conversion circuit, an input signal conversion circuit, a main control circuit, a switching quantity acquisition circuit, and a MOS drive circuit. Except for the switching quantity acquisition circuit, the other circuits are conventional circuits.

[0042] The power conversion circuit is used to convert the 48V DC voltage output from the DC power supply to 12V and 5V DC voltage, and to supply power to the input signal conversion circuit, MOS drive circuit and main control circuit.

[0043] The input signal conversion circuit is used to receive 0-10V analog voltage signal input and convert the input 0-10V analog voltage signal into a 0-5V analog voltage signal that can be recognized by the main control circuit.

[0044] The main control circuit is used to identify the converted 0-5V voltage analog signal and control the MOS drive circuit.

[0045] The MOS driver circuit is used to convert the switching signals output by the main control circuit into switching signals for the MOS.

[0046] like Figure 2 A connection diagram of the input signal conversion circuit and the main control circuit is shown, in which... Figure 2 The diagram also shows the connection status of the added switch quantity acquisition circuit and the main control circuit in this embodiment.

[0047] The main control circuit includes a first microcontroller U1, a first capacitor C1, and a second capacitor C2; the output terminal of the input signal conversion circuit is connected to the signal input terminal of the first microcontroller and outputs a 0-5V voltage analog signal to the first microcontroller.

[0048] The power supply terminal of the first microcontroller U1 is connected to a 5V DC voltage terminal and one end of the first capacitor C1 and the second capacitor C2; the other end of the first capacitor and the second capacitor are connected to the ground terminal of the first microcontroller U1 and grounded.

[0049] The PWM signal output terminal of the first microcontroller is connected to the MOS drive circuit to control the MOS drive circuit.

[0050] The switch signal acquisition circuit includes a light switching control switch 7 and a pull-up resistor 8 with a resistance of 20KΩ.

[0051] One end of the light switching control switch 7 is connected to the pull-up resistor 8 and the signal acquisition port of the first microcontroller U1, the other end of the pull-up resistor 8 is connected to +5V, and the other end of the light switching control switch is connected to GND.

[0052] When the light switching control switch 7 is in the off state, the signal acquisition port of the first microcontroller U1 becomes high level; when the light switching control switch 7 is in the closed state, the signal acquisition port of the first microcontroller U1 is low level.

[0053] When the signal acquisition port of the first microcontroller is high, the first microcontroller U1 sends a signal to turn on one LED. When the signal acquisition port of the first microcontroller is low, the first microcontroller U1 sends a signal to switch the LEDs.

[0054] like Figure 3 As shown, the LED constant current drive circuit includes a second microcontroller power supply circuit, a square wave signal conversion circuit, a second microcontroller U2, and a constant current power conversion circuit. There are two sets of constant current power conversion circuits.

[0055] Two sets of constant current power conversion circuits are defined as the first constant current power conversion circuit and the second constant current power conversion circuit.

[0056] The second microcontroller power supply circuit is used to remove the square wave signal from the received 48V square wave power supply and convert the 48V power supply with the square wave signal removed into a 5V DC power supply, while simultaneously powering the second microcontroller.

[0057] The square wave signal conversion circuit is used to convert the received 48V square wave power supply into a 5V square wave signal that can be recognized by the second microcontroller.

[0058] The second microcontroller is used to convert the identified square wave signal into PWM control signals with different duty cycles and output them.

[0059] The constant current power conversion circuit is connected to the LED lamp circuit on the corresponding sub-power supply line, and is used to convert the PWM control signal output by the second microcontroller into a constant current power supply with different currents, so as to realize the adjustment of the corresponding LED lamp with different brightness.

[0060] The second microcontroller U2 has two PWM signal output terminals, such as... Figure 3 The circuit has PWM1 and PWM2 ports, and each PWM signal output terminal is connected to one of the constant current power conversion circuits.

[0061] For example, the PWM1 port is connected to the first constant current power conversion circuit, the PWM2 port is connected to the second constant current power conversion circuit, and each group of constant current power conversion circuits is connected to one LED circuit (e.g., LED1 and LED2 circuits).

[0062] The two constant current power conversion circuits have the same structure, which will be described in detail below.

[0063] like Figure 4 As shown, the square wave signal conversion circuit includes two voltage divider resistors, such as the seventh resistor R7 and the ninth resistor R9 in the figure. One end of the square wave signal conversion circuit is used to receive the voltage input VIN.

[0064] The square wave signal conversion circuit is connected to the input pin INT of the second microcontroller U2 through two voltage divider resistors.

[0065] like Figure 5 As shown, the first constant current power supply conversion circuit includes:

[0066] The first resistor R1, the fifth resistor R5, the sixth resistor R6, the eighth resistor R8, the tenth resistor R10, the eleventh resistor R11, the first constant current chip U3, the third capacitor C3, the first diode D1, and the first inductor L1.

[0067] The PWM1 port of the second microcontroller U2 is connected to one end of the fifth resistor R5 and the sixth resistor R6. The other end of the fifth resistor R5, one end of the first resistor R1, and the PWM signal input terminal of the first constant current chip are connected.

[0068] The other end of the first resistor R1 and the other end of the sixth resistor R6 are grounded.

[0069] The positive terminal of the input power supply is connected to one end of the eighth resistor R8, the other end of the eighth resistor R8 is connected to one end of the third capacitor C3 and the power supply terminal of the first constant current chip U3, and the other end of the third capacitor C3 is grounded.

[0070] The CS terminal of the first constant current chip U3 is connected to one end of the tenth resistor R10 and the eleventh resistor R11; the other end of the tenth resistor R10 and the eleventh resistor R11 is grounded; the first diode D1 is a Zener diode.

[0071] The output terminal of the first constant current chip U3 is connected to one end of the first inductor L1 and the positive terminal of the first diode D1. The negative terminal of the first diode is connected to one end of the LED1 lamp, and the other end of the first inductor is connected to the other end of the LED1 lamp.

[0072] like Figure 6 As shown, the second constant current power conversion circuit includes:

[0073] The components include the second resistor R2, the third resistor R3, the fourth resistor R4, the twelfth resistor R12, the thirteenth resistor R13, the fourteenth resistor R14, the second constant current chip U4, the fourth capacitor C4, the second diode D2, and the second inductor L2.

[0074] The PWM2 port of the second microcontroller U2 is connected to one end of the third resistor R3 and the fourth resistor R4. The other end of the third resistor R3, one end of the second resistor R2, and the PWM signal input terminal of the second constant current chip are connected.

[0075] The other end of the second resistor R2 and the other end of the fourth resistor R4 are grounded.

[0076] The positive terminal of the input power supply is connected to one end of the twelfth resistor R12, the other end of the twelfth resistor R12 is connected to one end of the fourth capacitor and the power supply terminal of the second constant current chip, and the other end of the fourth capacitor is grounded.

[0077] The CS terminal of the second constant current chip U4 is connected to one end of the thirteenth resistor R13 and the fourteenth resistor R14; the other end of the thirteenth resistor R13 and the fourteenth resistor R14 is grounded; the second diode D2 is a Zener diode.

[0078] The output terminal of the second constant current chip U4 is connected to one end of the second inductor L2 and the positive terminal of the second diode. The negative terminal of the second diode is connected to one end of the LED2 lamp, and the other end of the second inductor is connected to the other end of the LED2 lamp.

[0079] It should be noted that the values ​​of the corresponding components in the first constant current power conversion circuit and the second constant current power conversion circuit are the same. The serial numbers of each component here are only for distinguishing the names of each component.

[0080] In this embodiment, the PWM1 and PWM2 ports of the second microcontroller U2 are used to control the corresponding constant current power conversion circuit, thereby lighting up the LEDs in the corresponding LED light circuit. This achieves light switching control, where the first type of LED light gradually turns off before the second type gradually turns on, avoiding the animal's discomfort from sudden light switching.

[0081] The general working process of the LED constant current carrier dimming device in this embodiment is as follows:

[0082] When the lighting control switch is off, the signal acquisition port (CHECK) of the first microcontroller is high, and the first microcontroller sends a signal to turn on one LED. When the lighting control switch is on, the signal acquisition port (CHECK) of the second microcontroller is low, and the first microcontroller sends a control signal for lighting switching.

[0083] After the second microcontroller recognizes the signal from the first microcontroller, it controls two independent constant current power conversion circuits through the PWM1 and PWM2 ports to enable the lighting and switching of LEDs in the two LED circuits.

[0084] This invention adds a dual-channel light switching function to the traditional LED constant current carrier dimming device. The constant current carrier dimming control circuit adds a switch quantity acquisition channel, which controls the switching between the two lights according to the change of the switch quantity status. The LED constant current drive circuit is increased to two outputs, providing users with more light options.

[0085] Of course, the above description is only a preferred embodiment of the present utility model. The present utility model is not limited to the above-described embodiments. It should be noted that any equivalent substitutions or obvious modifications made by those skilled in the art under the guidance of this specification fall within the scope of this specification and should be protected by the present utility model.

Claims

1. An LED constant current carrier dimming device with dual-channel lighting switching function, comprising a DC power supply, a constant current carrier dimming control circuit, a main power supply line, an LED constant current drive circuit, and an LED lamp circuit, characterized in that: There are multiple LED constant current driving circuits, and each LED constant current driving circuit is connected to the main power supply line. Each LED constant current drive circuit has two outputs, and each output is connected to an LED circuit that can emit LED light of different colors; the two LED circuits under each LED constant current drive circuit are independently controlled. The constant current carrier dimming control circuit is equipped with a switch quantity acquisition circuit, wherein the switching control of two LED lamp circuits under the same LED constant current drive circuit is realized based on the switch quantity state change of the switch quantity acquisition circuit.

2. The LED constant current carrier dimming device according to claim 1, characterized in that, The constant current carrier dimming control circuit includes a power conversion circuit, an input signal conversion circuit, a main control circuit, a switch quantity acquisition circuit, and a MOS drive circuit; wherein, the main control circuit includes a first microcontroller; The switch quantity acquisition circuit includes a light switching control switch and a pull-up resistor; One end of the light switching control switch is connected to one end of the pull-up resistor and the signal acquisition port of the first microcontroller, the other end of the pull-up resistor is connected to +5V, and the other end of the light switching control switch is grounded.

3. The LED constant current carrier dimming device according to claim 2, characterized in that, When the lighting switching control switch is in the off state, the signal acquisition port of the first microcontroller becomes high level; when the lighting switching control switch is in the closed state, the signal acquisition port of the first microcontroller becomes low level.

4. The LED constant current carrier dimming device according to claim 2, characterized in that, The main control circuit also includes a first capacitor and a second capacitor; the output terminal of the input signal conversion circuit is connected to the signal input terminal of the first microcontroller and is used to output a 0-5V voltage analog signal to the first microcontroller. The power supply terminal of the first microcontroller is connected to a 5V DC voltage terminal and one end of the first capacitor and the second capacitor; the other end of the first capacitor and the second capacitor are connected to the ground terminal of the first microcontroller and grounded. The PWM signal output terminal of the first microcontroller is connected to the MOS drive circuit to control the MOS drive circuit.

5. The LED constant current carrier dimming device according to claim 2, characterized in that, The LED constant current driving circuit includes a second microcontroller power supply circuit, a square wave signal conversion circuit, a second microcontroller, and a constant current power conversion circuit; the constant current power conversion circuit includes two sets: a first constant current power conversion circuit and a second constant current power conversion circuit. The second microcontroller has two PWM signal output terminals, and each PWM signal output terminal is connected to one of the constant current power conversion circuits. Each constant current power conversion circuit is connected to one LED circuit.

6. The LED constant current carrier dimming device according to claim 5, characterized in that, The square wave signal conversion circuit includes two voltage divider resistors. One end of the square wave signal conversion circuit is used to receive voltage input, and the square wave signal conversion circuit is connected to the input pin INT of the second microcontroller through the two voltage divider resistors.

7. The LED constant current carrier dimming device according to claim 5, characterized in that, The first constant current power conversion circuit includes a first resistor, a fifth resistor, a sixth resistor, an eighth resistor, a tenth resistor, an eleventh resistor, a first constant current chip, a third capacitor, a first diode, and a first inductor; One PWM signal output terminal of the second microcontroller is connected to one end of the fifth and sixth resistors, and the other end of the fifth resistor, one end of the first resistor, and the PWM signal input terminal of the first constant current chip are connected. The other end of the first resistor and the other end of the sixth resistor are grounded; The positive terminal of the input power supply is connected to one end of the eighth resistor, the other end of the eighth resistor is connected to one end of the third capacitor and the power supply terminal of the first constant current chip, and the other end of the third capacitor is grounded. The CS terminal of the first constant current chip is connected to one end of the tenth and eleventh resistors; the other ends of the tenth and eleventh resistors are grounded; the first diode is a Zener diode. The output terminal of the first constant current chip is connected to one end of the first inductor and the positive terminal of the first diode. The negative terminal of the first diode is connected to one end of the LED, and the other end of the first inductor is connected to the other end of the LED.

8. The LED constant current carrier dimming device according to claim 5, characterized in that, The second constant current power conversion circuit includes a second resistor, a third resistor, a fourth resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a second constant current chip, a fourth capacitor, a second diode, and a second inductor; The other PWM signal output terminal of the second microcontroller is connected to one end of the third and fourth resistors, and the other end of the third resistor, one end of the second resistor, and the PWM signal input terminal of the second constant current chip are connected. The other end of the second resistor and the other end of the fourth resistor are grounded; The positive terminal of the input power supply is connected to one end of the twelfth resistor, the other end of the twelfth resistor is connected to one end of the fourth capacitor and the power supply terminal of the second constant current chip, and the other end of the fourth capacitor is grounded. The CS terminal of the second constant current chip is connected to one end of the thirteenth and fourteenth resistors; the other ends of the thirteenth and fourteenth resistors are grounded; the second diode is a Zener diode. The output terminal of the second constant current chip is connected to one end of the second inductor and the positive terminal of the second diode. The negative terminal of the second diode is connected to one end of the LED, and the other end of the second inductor is connected to the other end of the LED.

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