Constant-voltage dimming control device and lamp control equipment

Abstract

The utility model relates to the technical field of dimming control, in particular to a constant-voltage dimming control device and lamp control equipment. The device comprises a potentiometer, an integrated operational amplifier unit, an oscillation unit and an output unit, wherein the potentiometer is connected with a power supply VCC1; the integrated operational amplifier unit comprises an operational amplifier U4A, and the in-phase input end of the operational amplifier U4A is connected with the potentiometer; the output end of the oscillation unit is connected with the inverted input end of the operational amplifier U4A, and the input end of the oscillation unit is connected with a power supply VCC; the output unit comprises a switch, and the output end of the operational amplifier U4A is connected with an LED lamp strip through the switch. According to the utility model, the disadvantage that the traditional constant-voltage LED drive cannot realize dimming is solved, and powerful support is provided for intelligent control of LED lighting equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of light control, especially to a constant voltage light control device and a lamp control equipment. BACKGROUND

[0002] In the field of planting, LED lamps or lighting devices using LED as light source have been widely used. In order to accurately match the specific needs of plants at different growth stages for light spectrum, it is crucial to adjust the output power of LED constant voltage drive. This adjustment process is essentially a fine regulation of the light spectrum emitted by LED lamps, aiming to optimize the lighting conditions and thus promote the healthy growth of plants.

[0003] However, traditional constant voltage LED drive technology often does not have light adjustment function, or only realizes light adjustment by converting constant voltage output into constant current drive. This way not only has complex operation, but also has certain limitations in flexibility and accuracy of light spectrum adjustment. SUMMARY

[0004] To solve the above technical problems, the utility model provides a constant voltage light control device and a lamp control equipment, the constant voltage light control device includes: a potentiometer, an integrated operational amplifier unit, an oscillation unit and an output unit.

[0005] Among them, the potentiometer is connected with power supply VCC1; the integrated operational amplifier unit includes an operational amplifier U4A, the non-inverting input end of the operational amplifier U4A is connected with the potentiometer; the output end of the oscillation unit is connected with the inverting input end of the operational amplifier U4A, and the input end is connected with power supply VCC; the output unit includes a switch, and the output end of the operational amplifier U4A is connected with LED lamp strip through the switch.

[0006] In an embodiment of the utility model, the device further includes a feedback unit, the feedback unit includes an operational amplifier U4B, the non-inverting input end of the operational amplifier U4B is connected with power supply VCC, and the output end of the operational amplifier U4B is connected with the non-inverting input end and the input end of the oscillation unit.

[0007] In an embodiment of the utility model, the feedback unit further includes a resistor R5 and a resistor R6, one end of the resistor R5 is connected with power supply VCC, the other end is connected with the resistor R6 in series, the other end of the resistor R6 is grounded, and the non-inverting input end of the operational amplifier U4B is connected to the path formed by the resistor R5 and the resistor R6 in series.

[0008] In an embodiment of the utility model, the oscillation unit includes resistance R4 and capacitor C15, the inverting input end of operational amplifier U4A divides into first branch and second branch, the first branch connects the output end of operational amplifier U4B through resistance R4, the second branch connects ground through capacitor C15.

[0009] In an embodiment of the utility model, the inverting input end of operational amplifier U4B connects the inverting input end of operational amplifier U4A.

[0010] In an embodiment of the utility model, the switch is PMOS field effect tube Q3, the gate of PMOS field effect tube Q3 connects the output end of operational amplifier U4A, the drain connects the LED lamp strip, and the source connects ground.

[0011] In an embodiment of the utility model, the integrated operational amplifier unit further includes current-limiting resistance R1, and the output end of operational amplifier U4A is connected to the gate through the current-limiting resistance R1.

[0012] In an embodiment of the utility model, the output unit further includes a protection assembly, and the protection assembly includes resistance R9 and resistance R10, and the resistance R9 and the resistance R10 are both connected in parallel to the LED lamp strip.

[0013] In an embodiment of the utility model, the oscillation unit is a 555 timer circuit or an LC oscillation circuit.

[0014] Based on the above technical solution, the utility model further provides a lamp control equipment, which comprises the constant-voltage dimming control device in the above technical solution, and the device is connected to an LED lamp.

[0015] The above technical solution of the utility model has the following advantages compared with the prior art:

[0016] The constant-voltage dimming control device provided by the utility model generates a stable PWM square wave signal to accurately control the brightness of the LED lamp strip by adjusting the potentiometer and changing the oscillation frequency of the oscillation unit, solves the drawback that the traditional constant-voltage LED drive cannot be dimmed, and provides strong support for the intelligent control of LED lighting equipment. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to make the content of the utility model more easily understood clearly, the utility model is further described in detail below according to specific embodiments of the utility model and in combination with the drawings, wherein,

[0018] Figure 1 is a structural schematic view of a constant-voltage dimming control device provided by the utility model;

[0019] Figure 2 is Figure 1 a partial structural schematic diagram of the device described in the foregoing embodiment;

[0020] Figure 3 is Figure 1 a structural schematic diagram of an output unit of the device described in the foregoing embodiment;

[0021] Description of the drawings: 10, potentiometer; 20, integrated operational amplifier unit; 30, oscillation unit; 40, output unit; 41, switch; 50, feedback circuit. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with the drawings and specific embodiments, so that those skilled in the art can better understand the utility model and can be implemented, but the embodiments are not as the limitation of the utility model.

[0023] Embodiment one

[0024] Referring to Figures 1 to 3 The utility model provides a constant voltage light control device, the constant voltage light control device includes: potentiometer 10, integrated operational amplifier unit 20, oscillation unit 30 and output unit 40.

[0025] Among them, the potentiometer 10 connects power supply VCC1;The integrated operational amplifier unit 20 includes operational amplifier U4A, and the noninverting input end of the operational amplifier U4A is connected with the potentiometer 10;The output end of the oscillation unit 30 is connected with the inverting input end of the operational amplifier U4A, and the input end is connected with power supply VCC;The output unit 40 includes switch 41, and the output end of the operational amplifier U4A is connected with LED lamp strip through the switch 41.

[0026] From the above technical solution, the user can change the resistance value of the access circuit by rotating the potentiometer 10, and the resistance value change of the potentiometer 10 will directly affect the voltage of the noninverting input end of the operational amplifier U4A in the integrated operational amplifier unit 20, and the oscillation unit 30 adjusts the oscillation frequency according to the input signal, and the output end of the oscillation unit 30 is connected to the inverting input end of the operational amplifier U4A, and the operational amplifier U4A generates a stable PWM (pulse width modulation) square wave signal by comparing the signals of the noninverting input end (voltage regulated by the potentiometer) and the inverting input end. The PWM square wave signal output by the integrated operational amplifier unit 20 controls the on-off time of the LED lamp strip through the output unit 40.

[0027] Through the device, in the occasion needing long time illumination (such as office, shopping mall, family etc.), using the constant voltage light control device of the utility model can significantly reduce energy consumption, and realizes the remarkable energy-saving effect.

[0028] Further, the device further comprises a feedback unit 50, the feedback unit 50 comprises an operational amplifier U4B, a resistor R5 and a resistor R6, the same-phase input end of the operational amplifier U4B is connected to a power supply VCC, the output end of the operational amplifier U4B is connected to the same-phase input end of the operational amplifier U4B and the input end of the oscillation unit 30; one end of the resistor R5 is connected to the power supply VCC, the other end is connected to the resistor R6 in series, the other end of the resistor R6 is grounded, and the same-phase input end of the operational amplifier U4B is connected to the path formed by the resistor R5 and the resistor R6 in series.

[0029] In the device, the feedback unit 50 monitors the changes of the power supply voltage VCC or the output voltage in real time through the voltage division circuit composed of the operational amplifier U4B and the resistor R5 and the resistor R6, when the power supply voltage or the output voltage changes, the change will be fed back to the same-phase input end of the operational amplifier U4B, and the operational amplifier U4B adjusts the input signal of the oscillation unit 30 through the output end, so as to realize the adjustment of the output voltage, so as to maintain the stability of the output voltage.

[0030] Further, the oscillation unit 30 comprises, but is not limited to, an RC oscillation circuit or a 555 timer circuit or an LC oscillation circuit. The oscillation circuit can control the frequency and amplitude of the oscillator by adjusting the element parameters (such as resistance, capacitance, etc.) in the circuit based on the combination of positive feedback and negative feedback.

[0031] As shown in Figure 2 When the oscillation unit 30 is an RC oscillation circuit, the oscillation unit 30 comprises a resistor R4 and a capacitor C15, the inverting input end of the operational amplifier U4A is divided into a first branch and a second branch, the first branch connects the output end of the operational amplifier U4B through the resistor R4, and the second branch is grounded through the capacitor C15. This connection mode enables the inverting input end of the operational amplifier U4A to receive the feedback signal from the output end of the operational amplifier U4B, and to perform phase shift through the capacitor C15, thereby forming an oscillation condition.

[0032] The inverting input end of the operational amplifier U4B is connected to the inverting input end of the operational amplifier U4A. This connection mode enables the operational amplifier U4B to monitor the voltage of the inverting input end of the operational amplifier U4A in real time, and to adjust the voltage of the output end as needed, which changes the voltage drop on the resistor R4, thereby affecting the voltage of the inverting input end of the operational amplifier U4A. Through this feedback adjustment mechanism, the frequency and amplitude of the oscillation signal can be stabilized.

[0033] Further, the oscillation signal generated by the oscillation unit 30 can be converted into a PWM signal after being processed by the operational amplifier U4A, and in this process, the duty cycle of the PWM signal is determined by the frequency and amplitude of the oscillation signal, and can be changed by adjusting the potentiometer 10.

[0034] As shown in Figure 3 The output unit 40 includes a switch 41 and a protection component, the switch 41 is a PMOS field effect tube Q3, the gate of the PMOS field effect tube Q3 is connected to the output end of the operational amplifier U4A, the drain is connected to the LED lamp strip, and the source is grounded.

[0035] When the operational amplifier U4A outputs the PWM signal, the signal controls the conduction and cut-off of the PMOS field effect tube Q3, and by adjusting the duty cycle of the PWM signal through the potentiometer 10, the conduction time of the PMOS field effect tube Q3 can be controlled, thereby accurately adjusting the brightness of the LED lamp strip.

[0036] Meanwhile, the resistors R9 and R10 serve as protection components, when the LED lamp strip is short-circuited or overloaded, the current through the resistors R9 and R10 will increase sharply, causing the resistors to heat up and consume additional power, and this heating effect can trigger protection mechanisms such as fuse blowing and thermistor disconnection in the circuit, thereby cutting off the power supply and protecting the LED lamp strip and the entire circuit from damage.

[0037] Further, the integrated operational amplifier unit 20 further includes a current limiting resistor R1, and the output end of the operational amplifier U4A is connected to the gate through the current limiting resistor R1.

[0038] In summary, the constant voltage dimming control device of the utility model can accurately control the brightness of the LED lamp strip by adjusting the potentiometer and changing the oscillation frequency of the oscillation unit to generate a stable PWM square wave signal. This device not only improves the flexibility and comfort of lighting, but also significantly reduces energy consumption, especially in situations that require long-term lighting, the energy-saving effect is particularly significant.

[0039] Embodiment two

[0040] Based on the technical solutions proposed in the above embodiment one, the utility model also provides a lamp control device, which includes the constant voltage dimming control device described in the above embodiment one, and the device is connected to an LED lamp.

[0041] Further, the device can also be built-in light sensing sensor and timing switch module, through the light sensing sensor can real-time monitoring of ambient light intensity, and according to the preset light level automatically adjust the brightness of the lamp. This function makes the lighting system can be adapted to changes in ambient light, improve the comfort and energy saving effect of lighting; not only that, users based on timing switch module can also set the automatic switch time of the lamp according to the needs. This function is particularly useful in the need for timing lighting occasions (such as night lighting, morning wake-up, etc.), not only improves the flexibility of the lighting system, but also further reduces energy consumption.

[0042] Obviously, the above embodiments are merely examples for the sake of clarity, and are not limited to the embodiments. For those of ordinary skill in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A constant voltage dimming control device, characterized in that, include: Potentiometer (10), the potentiometer (10) is connected to power supply VCC1; An integrated operational amplifier unit (20) is provided, which includes an operational amplifier U4A, the non-inverting input of which is connected to the potentiometer. Oscillating unit (30), the output terminal of the oscillation unit (30) is connected to the inverting input terminal of the operational amplifier U4A, and its input terminal is connected to the power supply VCC; And an output unit (40), the output unit (40) includes a switch (41), the output terminal of the operational amplifier U4A is connected to an LED light strip through the switch (41).

2. The constant voltage dimming control device according to claim 1, characterized in that, The device further includes a feedback unit (50), which includes an operational amplifier U4B. The non-inverting input of the operational amplifier U4B is connected to the power supply VCC, and the output of the operational amplifier U4B is connected to its non-inverting input and the input of the oscillation unit (30).

3. The constant voltage dimming control device according to claim 2, characterized in that, The feedback unit (50) further includes resistors R5 and R6. One end of resistor R5 is connected to power supply VCC, and the other end is connected in series with resistor R6. The other end of resistor R6 is grounded. The non-inverting input terminal of the operational amplifier U4B is connected to the path formed by the series connection of resistors R5 and R6.

4. The constant voltage dimming control device according to claim 2, characterized in that, The oscillation unit (30) includes a resistor R4 and a capacitor C15. The inverting input terminal of the operational amplifier U4A is divided into a first branch and a second branch. The first branch is connected to the output terminal of the operational amplifier U4B through the resistor R4, and the second branch is grounded through the capacitor C15.

5. The constant voltage dimming control device according to claim 2, characterized in that, The inverting input terminal of the operational amplifier U4B is connected to the inverting input terminal of the operational amplifier U4A.

6. The constant voltage dimming control device according to claim 1, characterized in that, The switch (41) is a PMOS field-effect transistor Q3. The gate of the PMOS field-effect transistor Q3 is connected to the output terminal of the operational amplifier U4A, the drain is connected to the LED strip, and the source is grounded.

7. The constant voltage dimming control device according to claim 6, characterized in that, The integrated operational amplifier unit (20) also includes a current-limiting resistor R1, and the output terminal of the operational amplifier U4A is connected to the gate through the current-limiting resistor R1.

8. The constant voltage dimming control device according to claim 1, characterized in that, The output unit (40) also includes a protection component, which includes resistors R9 and R10, both of which are connected in parallel to the LED strip.

9. The constant voltage dimming control device according to claim 1, characterized in that, The oscillation unit (30) is a 555 timer circuit or an LC oscillation circuit.

10. A lighting control device, characterized in that, Includes the constant voltage dimming control device as described in any one of claims 1 to 9, wherein the device is connected to an LED lamp.

Images