Control circuit for lights

Abstract

Control circuit for luminaires, comprising a power supply (1), a control unit (2), and a switching unit (3) controlled by the control unit (2), wherein the output of the power supply (1) (VIN) is electrically connected to both the control unit (2) and the switching unit (3), the switching unit (3) comprising three groups of circuits, each group of circuits comprising first switching transistors (Q1, Q2, Q3) and second switching transistors (Q4, Q5, Q6) controlled by the control unit (2), the first terminal of the first switching transistors (Q1, Q2, Q3) being connected to the output (VIN) of the power supply (1), the third terminal of the first switching transistors (Q1, Q2, Q3) being connected to the first terminal of the second switching transistors (Q4, Q5, Q6), and the second terminal of the second switching transistors (Q4, Q5, Q6) being connected to the control unit (2). is connectedwherein the third terminal of the second switching transistors (Q4, Q5, Q6) is grounded, characterized in that each group of circuits additionally comprises third switching transistors (Q7, Q8, Q9), wherein the first terminal of the third switching transistors (Q7, Q8, Q9) is connected to the second terminal of the first switching transistors (Q1, Q2, Q3), wherein the second terminal of the third switching transistors (Q7, Q8, Q9) is connected to the control unit (2), wherein the third terminal of the third switching transistors (Q7, Q8, Q9) is grounded.

Description

TECHNICAL AREA

[0001] The present utility model relates to the field of lighting technology and in particular to a control circuit for luminaires. STATE OF THE ART

[0002] Fig. Figure 6 shows the lighting control system disclosed in CN217789939U, which comprises a DC power supply, a control unit, and a switching unit 3 controlled by the control unit 2, which is switched on or off. The output of the DC power supply is connected to both the control unit and the switching unit. The switching unit 3 comprises three groups of switching circuits, each group of switching circuits comprising a load connection section A, B, C, and a first switching transistor Q3, Q2, Q1 and a second switching transistor Q4, Q5, Q6, independently controlled by the control unit 2. The first terminal of the first switching transistors Q3, Q2, Q1 is connected to the output of the control unit 2, and the second terminal of the first switching transistors Q3, Q2, Q1 is connected to the DC power supply. The third terminal of the first switching transistors Q3, Q2, Q1 is connected to the third terminal of the second switching transistors Q4, Q5, Q6.The first terminal of the second switching transistors Q4, Q5, Q6 is connected to the output of control unit 2, and the second terminal of the second switching transistors Q4, Q5, Q6 is grounded. The load connection sections A, B, C are located at the junction between the third terminal of the first switching transistors Q3, Q2, Q1 and the third terminal of the second switching transistors Q4, Q5, Q6.

[0003] The circuit described above has a problem: it is only suitable for low-voltage sources (explained using one of the circuits as an example). This is because the supply voltage of microcontroller U2 is 5 V, and the high level output by microcontroller U2 reaches a maximum of 5 V. If V+ has a voltage of 5 V and pin 13 of microcontroller U2 outputs a low level to the base of the first switching transistor Q1, the first switching transistor Q1 will be switched on. Conversely, if pin 13 of microcontroller U2 outputs a voltage of 5 V to the base of the first switching transistor Q1, the voltage at the collector of the first switching transistor Q1 will also be 5 V, thus switching the first switching transistor Q1 off.However, if the voltage V+ is greater than 5 V, for example 12 V, 24 V, or 31 V, and pin 13 of microcontroller U2 continues to supply 5 V to the base of the first switching transistor Q1, a potential difference exists across Q1 due to the applied voltage of 12 V, 24 V, or 31 V. In this case, regardless of whether microcontroller U2 outputs a high or low level, Q1 cannot be switched off when the voltage V+ is above 5 V. Therefore, the light cannot be controlled. Consequently, the circuit described above is not applicable to load voltages greater than 5 V, and a separate circuit must be designed to control these high-voltage lights, inevitably increasing costs. It follows that the described circuit is not universally applicable to either high-voltage or low-voltage loads.

[0004] Furthermore, sensitive components may be present in the load circuit. These sensitive components store electrical energy, and when the switching transistor is switched off, the voltage from these components acts on the load terminal section. If this voltage is too high, it can damage the individual switching transistors. If this voltage exceeds the voltage rating of the switching transistors, it leads to their immediate failure. CONTENTS OF THE PRESENT USE SAMPLE

[0005] The present utility model provides a control circuit for luminaires that is suitable for both high-voltage and low-voltage loads.

[0006] The technical solution for overcoming the aforementioned technical problems is as follows: A control circuit for luminaires, comprising a power supply, a control unit, and a switching unit controlled by the control unit, wherein the output of the power supply is electrically connected to both the control unit and the switching unit, wherein the switching unit comprises three groups of circuits, each group of circuits comprising first switching transistors and second switching transistors controlled by the control unit, wherein the first terminal of the first switching transistors is connected to the output of the power supply, wherein the third terminal of the first switching transistors is connected to the first terminal of the second switching transistors, wherein the second terminal of the second switching transistors is connected to the control unit, and wherein the third terminal of the second switching transistors is grounded.characterized in that each group of circuits additionally comprises third switching transistors, wherein the first terminal of the third switching transistors is connected to the second terminal of the first switching transistors, wherein the second terminal of the third switching transistors is connected to the control unit, and wherein the third terminal of the third switching transistors is grounded.

[0007] When the control unit outputs a high level to the third switching transistors, the third switch in the first switching circuit becomes conductive. Since the emitter of the third switching transistors is grounded, a low level is present at the second terminal of the first switching transistors, while the collector of the first switching transistor carries a high level. In this state, the first switching transistors are conducting. If the control unit outputs a low level to the third switching transistors, the third switching transistors cannot become conductive. In this case, there is no voltage difference between the first and second terminals of the first switching transistors, thus keeping the first switching transistors in the off state.It is evident that the output voltage of the power supply, regardless of whether it is low or high, can switch the first switching transistors either conducting or non-conducting. The control unit causes the first and second switching transistors to be switched on and off alternately, thereby switching the lights connected to the output terminal on or off accordingly. The present utility model, by adding a third switching transistor based on the existing circuit technology, achieves control of the switching unit without the need for a control chip to control the thyristors at high voltage, as is required in the background technology. Thus, the present utility model offers the advantages of a simpler structure and lower costs compared to the background technology. BRIEF DESCRIPTION OF THE DRAWING Fig. Figure 1 shows the circuit diagram of the control circuit for luminaires of this utility model. Fig. 2 shows the circuit diagram of the control unit. Fig. 1. Fig. Figure 3 shows the circuit diagram of the switch unit. Fig. 1. Fig. Figure 4 shows the circuit diagram of a first-type lamp connected to the output of the switch unit. Fig. Figure 5 shows the circuit diagram of a second type of light fixture connected to the output of the switch unit. Fig. Figure 6 shows the circuit diagram of the control unit and the switch unit in the existing technology. DETAILED DESCRIPTION

[0008] The present utility model invention will be explained in more detail below with reference to the attached figures and specific embodiments.

[0009] As in the Fig. 1 to Fig. The control circuit for luminaires of this utility model comprises a power supply unit 1, a control unit 2, and a switch unit 3 controlled by the control unit 2. The output VIN of the power supply unit 1 is electrically connected to both the control unit 2 and the switch unit 3. The power supply unit 1 provides a DC voltage as its output. The power supply unit 1 uses a conventional power supply circuit, the structure of which is not described further here. The output voltage VIN of the power supply unit 1 in this utility model is in the range of 5 to 31 V; for example, it can be 5 V, 12 V, 24 V, or 31 V. Therefore, the control unit 2 and the switch unit 3 of this utility model are suitable for both low and high input voltages.

[0010] Control unit 2 comprises the twelfth resistor R12, the LED2, the nineteenth resistor R19, the Zener diode ZD1, the sixth capacitor C6, the seventh capacitor C7, the infrared receiver U4, the microcontroller U5, the crystal oscillator XL1, the twelfth capacitor C12, the thirteenth capacitor C13, the eighteenth resistor R18, the indicator light LED1, and the switch SW1. One end of the twelfth resistor R12 is connected to the output VIN of power supply 1, while the other end of the twelfth resistor R12 is connected to the anode of LED2, the cathode of Zener diode ZD1, one end of the sixth capacitor C6, one end of the seventh capacitor C7, the first terminal of infrared receiver U4, and the tenth terminal of microcontroller U5.The other end of LED2 is connected to one end of the nineteenth resistor R19, while the other end of the nineteenth resistor R19, the anode side of Zener diode ZD1, the other end of the sixth capacitor C6, the other end of the seventh capacitor C7, and the second terminal of infrared receiver U4 are all grounded. The third terminal of infrared receiver U4 is connected to the eighth terminal of microcontroller U5. The eleventh terminal of microcontroller U5 is connected to one end of crystal oscillator XL1 and one end of twelfth capacitor C12. The twelfth terminal of microcontroller U5 is connected to the other end of crystal oscillator XL1 and one end of thirteenth capacitor C13. The other ends of twelfth and thirteenth capacitors C12 and C13, respectively, are grounded.

[0011] C13 are grounded. The thirteenth pin of microcontroller U5 is connected to one end of the eighteenth resistor R18, with the other end of resistor R18 grounded. The fourteenth pin of microcontroller U5 is connected to one end of push button SW1, with the other end of push button SW1 grounded. Microcontroller U5 preferably uses a single-chip microcontroller. A control program for controlling the light's illumination mode is stored in microcontroller U5. After microcontroller U5 receives a user signal (sent via push button SW1 or the infrared remote control) and executes the control program, it issues control commands to change the light's illumination mode.

[0012] The twelfth resistor, R12, in control unit 2 acts as a current limiter to reduce current. LED2 indicates that control unit 2 has received power from the power supply unit 1. Zener diode ZD1 ensures a stable voltage from the power supply unit 1, which is supplied to microcontroller U5. Capacitors C6 and C7 filter the voltage. Infrared receiver U4 receives infrared signals sent by the user via the infrared remote control and transmits them to microcontroller U5. After processing, microcontroller U5 issues corresponding control commands to change the light's illumination mode. Crystal oscillator XL1, capacitor C12, and capacitor C13 form an oscillator circuit that converts the voltage into a corresponding frequency signal and sends it to microcontroller U5.The eighteenth resistor, R18, limits the current of the electrical signal output by microcontroller U5. The illumination of indicator LED1 shows that microcontroller U5 is successfully powered. The user sends control commands to microcontroller U5 via push button SW1 to change the illumination mode of the light.

[0013] The switching unit 3 comprises three groups of circuits, each group of circuits comprising a first switching transistor Q1, Q2, Q3, a second switching transistor Q4, Q5, Q6, and a third switching transistor Q7, Q8, Q9, all controlled by the control unit 2. The first switching transistors Q1, Q2, Q3, the second switching transistors Q4, Q5, Q6, and the third switching transistors Q7, Q8, Q9 consist of triodes or MOSFETs; in this embodiment, triodes are preferably used.

[0014] The first terminal of the first switching transistor Q1 in the first switching circuit group is connected to the output VIN of the power supply unit 1, the third terminal of the first switching transistor Q1 in the first switching circuit group is connected to the first terminal of the second switching transistor Q4 in the first switching circuit group, the second terminal of the second switching transistor Q4 in the first switching circuit group is connected to the ninth terminal of the microcontroller U5 in the control unit 2, the third terminal of the second switching transistor Q4 in the first switching circuit group is grounded, the first terminal of the third switching transistor Q7 in the first switching circuit group is connected to the second terminal of the first switching transistor Q1 in the first switching circuit group.The second terminal of the third switching transistor Q7 in the first switching circuit group is connected to the first terminal of the microcontroller U5 in the control unit 2, and the third terminal of the third switching transistor Q7 in the first switching circuit group is grounded.

[0015] The first terminal of the first switching transistor Q2 in the second switching circuit group is connected to the output VIN of the power supply unit 1, the third terminal of the first switching transistor Q2 in the second switching circuit group is connected to the first terminal of the second switching transistor Q5 in the second switching circuit group, the second terminal of the second switching transistor Q5 in the second switching circuit group is connected to the seventh terminal of the microcontroller U5 in the control unit 2, the third terminal of the second switching transistor Q5 in the second switching circuit group is grounded, the first terminal of the third switching transistor Q8 in the second switching circuit group is connected to the second terminal of the first switching transistor Q2 in the second switching circuit group.The second terminal of the third switching transistor Q8 in the second switching circuit group is connected to the second terminal of the microcontroller U5 in the control unit 2, and the third terminal of the third switching transistor Q8 in the second switching circuit group is grounded.

[0016] The first terminal of the first switching transistor Q3 in the third switching circuit group is connected to the output VIN of the power supply unit 1, the third terminal of the first switching transistor Q3 in the third switching circuit group is connected to the first terminal of the second switching transistor Q6 of the third switching circuit group, the second terminal of the second switching transistor Q6 in the third switching circuit group is connected to the sixth terminal of the microcontroller U5 of the control unit 2, the third terminal of the second switching transistor Q6 in the third switching circuit group is grounded, the first terminal of the third switching transistor Q9 in the third switching circuit group is connected to the second terminal of the first switching transistor Q3 in the third switching circuit group.The second terminal of the third switching transistor Q9 in the third switching circuit group is connected to the third terminal of the microcontroller U5 of the control unit 2; the third terminal of the third switching transistor Q9 in the second switching circuit group is grounded.

[0017] Since all of the above-mentioned switching transistors are triodes, the first terminal of each switching transistor is the collector, the second terminal is the base, and the third terminal is the emitter.

[0018] In this embodiment, each switch circuit group preferably further comprises first resistors RE1, RE2, RE3, second resistors RD1, RD2, RD3, third resistors RB1, RB2, RB3 and fourth resistors RA1, RA2, RA3, wherein: One end of the first resistor RE1 in the first switching circuit group is connected to the output VIN of power supply unit 1, while the other end of the first resistor RE1 in the first switching circuit group is connected to the second terminal of the first switching transistor Q1 in the first switching circuit group. One end of the second resistor RD1 in the first switching circuit group is connected to the second terminal of the first switching transistor Q1 in the first switching circuit group, while the other end of the second resistor RD1 in the first switching circuit group is connected to the first terminal of the third switching transistor Q7 in the first switching circuit group.One end of the third resistor RB1 in the first switching circuit group is connected to the ninth terminal of microcontroller U5 in control unit 2, while the other end of the third resistor RB1 in the first switching circuit group is connected to the second terminal of the second switching transistor Q4 in the first switching circuit group. One end of the fourth resistor RA1 in the first switching circuit group is connected to the first terminal of microcontroller U5 in control unit 2, while the other end of the fourth resistor RA1 in the first switching circuit group is connected to the second terminal of the third switching transistor Q7 in the first switching circuit group.

[0019] One end of the first resistor RE2 in the second switching circuit group is connected to the output VIN of power supply unit 1, and the other end of the first resistor RE2 in the second switching circuit group is connected to the second terminal of the first transistor Q2 in the second switching circuit group. One end of the second resistor RD2 in the second switching circuit group is connected to the second terminal of the first transistor Q2 in the second switching circuit group, while the other end of the second resistor RD2 in the second switching circuit group is connected to the first terminal of the third transistor Q8 in the second switching circuit group.One end of the third resistor RB2 in the second switch circuit group is connected to the seventh terminal of microcontroller U5 in control unit 2, while the other end of the third resistor RB2 in the second switch circuit group is connected to the second terminal of the second transistor Q5 in the second switch circuit group. One end of the fourth resistor RA2 in the second switch circuit group is connected to the second terminal of microcontroller U5 in control unit 2, while the other end of the fourth resistor RA2 in the second switch circuit group is connected to the second terminal of the third transistor Q8 in the second switch circuit group.

[0020] One end of the first resistor RE3 in the third switching circuit group is connected to the output VIN of power supply unit 1, while the other end of the first resistor RE3 in the third switching circuit group is connected to the second terminal of the first switching transistor Q3 in the third switching circuit group. One end of the second resistor RD3 in the third switching circuit group is connected to the second terminal of the first switching transistor Q3 in the third switching circuit group, while the other end of the second resistor RD3 in the third switching circuit group is connected to the first terminal of the third switching transistor Q9 in the third switching circuit group.One end of the third resistor RB3 in the third switching circuit group is connected to the sixth terminal of microcontroller U5 of control unit 2, while the other end of the third resistor RB3 in the third switching circuit group is connected to the second terminal of the second switching transistor Q6 in the third switching circuit group. One end of the fourth resistor RA3 in the third switching circuit group is connected to the third terminal of microcontroller U5 of control unit 2, while the other end of the fourth resistor RA3 in the third switching circuit group is connected to the second terminal of the third switching transistor Q9 in the third switching circuit group.

[0021] Each switching circuit group also includes first diodes D1, D3, D5, second diodes D2, D4, D6, and capacitors CR1, CR2, CR3. The first diodes D1, D3, D5 and the second diodes D2, D4, D6 prevent the individual switching transistors from being damaged by voltage spikes that occur in sensitive loads. This contributes to improved circuit stability.

[0022] In this embodiment, the anode of the first diode D1 in the first switching circuit group is connected to the third terminal of the first switching transistor Q1 in the first switching circuit group, while the cathode of the first diode D1 in the first switching circuit group is connected to the output VIN of the power supply unit 1. The cathode of the second diode D2 in the first switching circuit group is connected to the third terminal of the first switching transistor Q1 in the first switching circuit group, while the anode of the second diode D2 in the first switching circuit group is grounded. One electrode of capacitor CR1 in the first switching circuit group is connected to the second terminal of the second switching transistor Q4 in the first switching circuit group, while the other electrode of capacitor CR1 in the first switching circuit group is grounded.

[0023] The anode of the first diode D3 in the second switching circuit group is connected to the third terminal of the first switching transistor Q2 in the second switching circuit group, while the cathode of the first diode D3 in the second switching circuit group is connected to the output VIN of power supply unit 1. The cathode of the second diode D4 in the second switching circuit group is connected to the third terminal of the first switching transistor Q2 in the second switching circuit group, while the anode of the second diode D4 in the second switching circuit group is grounded. One electrode of capacitor CR2 in the second switching circuit group is connected to the second terminal of the second switching transistor Q5 in the second switching circuit group, while the other electrode of capacitor CR2 in the second switching circuit group is grounded.

[0024] The anode of the first diode D5 in the third switching circuit group is connected to the third terminal of the first switching transistor Q3 in the third switching circuit group, while the cathode of the first diode D5 in the third switching circuit group is connected to the output VIN of power supply unit 1. The cathode of the second diode D6 in the third switching circuit group is connected to the third terminal of the first switching transistor Q3 in the third switching circuit group, while the anode of the second diode D4 in the second switching circuit group is grounded. One electrode of capacitor CR3 in the third switching circuit group is connected to the second terminal of the second switching transistor Q6 in the third switching circuit group, while the other electrode of capacitor CR3 in the third switching circuit group is grounded.

[0025] The first switching circuit group has a first output A, the second switching circuit group has a second output B, and the third switching circuit group has a third output C. That is, the first output A is brought out between the third terminal of the first switching transistor Q1 and the first terminal of the second switching transistor Q4 in the first switching circuit group; the second output B is brought out between the third terminal of the first switching transistor Q2 and the first terminal of the second switching transistor Q5 in the second switching circuit group; and the third output C is brought out between the third terminal of the first switching transistor Q3 and the first terminal of the second switching transistor Q6 in the third switching circuit group. The first output A, the second output B, and the third output C are each connected to the... Fig. 4 and Fig. 5 lights shown are connected.

[0026] Furthermore, luminaires such as those in include Fig. 4 and Fig. 5 a first line 4, a second line 5, a third line 6, a first LED light 11, a second LED light 13, a third LED light 12, a fourth LED light 14, a fifth LED light 21 and a sixth LED light 22, wherein the first line 4 is connected to the first output A in the first switch circuit group, wherein the second line 5 is connected to the second output B in the second switch circuit group, wherein the third line 6 is connected to the third output C in the third switch circuit group.The anode side of the first LED 11 is connected to the first conductor 4, the cathode side of the first LED 11 is connected to the second conductor 5; the cathode side of the second LED 13 is connected to the first conductor 4, the anode side of the second LED 13 is connected to the second conductor 5; the cathode side of the third LED 12 is connected to the second conductor 5, the anode side of the third LED 12 is connected to the third conductor 6; the anode side of the fourth LED 14 is connected to the second conductor 5, the cathode side of the fourth LED 14 is connected to the third conductor 6; the anode side of the fifth LED 21 is connected to the first conductor 4, the cathode side of the fifth LED 21 is connected to the third conductor 6.The cathode side of the sixth LED 22 is connected to the first line 4, while the anode side of the sixth LED 22 is connected to the third line 6. The first LED 11, the second LED 13, the third LED 12, the fourth LED 14, and one or more fifth LED 21 are connected as shown in [reference]. Fig. 4 cyclically connected to the conductor to form a string of lights, wherein the first LED light 11, the second LED light 13, the third LED light 12 and the fourth LED light 14 are evenly distributed along the string of lights, wherein one or more fifth LED lights 21 are arranged next to the first LED light 11, the second LED light 13, the third LED light 12 and the fourth LED light 14 to form a backlight.

[0027] The first LED light 11, the second LED light 13, the third LED light 12, the fourth LED light 14 and one or more fifth LED lights 21 and sixth LED lights 22 are as in Fig. 5 cyclically connected to the conductor to form a string of lights, wherein the first LED 11, the second LED 13, the third LED 12, and the fourth LED 14 are evenly distributed along the string of lights, with one or more fifth LED 21 and sixth LED 22 arranged next to the first LED 11, the second LED 13, the third LED 12, and the fourth LED 14 to form a backlight. The fifth LED 21 and the sixth LED 22 are encapsulated together, or the fifth LED 21 and the sixth LED 22 represent two antiparallel-connected LEDs in a bicolor light.

[0028] The first LED light 11 to fourth LED light 14 in Fig. 4 and Fig. The five LEDs are evenly spaced and arranged in sequence to demonstrate the chasing light effect of the lamp (this effect is visible at different duty cycles of the control signals output by the microcontroller U5). By using the infrared receiver U4 with the infrared remote control or by pressing a button, commands can be sent to the microcontroller U5 to change the lighting mode of the first LED 11 to the fourth LED 14, thus creating different lighting effects. The fifth LED 21 in Fig. 4 as well as the fifth LED light 21 and the sixth LED light 22 in Fig.The fifth LED (21) and sixth LED (22) serve as backlighting. The colors of the fifth LED (21) and sixth LED (22) can differ. After switching on the control unit (2), the backlighting is in continuous illumination mode. The fifth LED (21) and sixth LED (22) can also be used for a chasing light effect.

[0029] The work process is explained using the example of the first switch circuit group in switch unit 3: When the first pin of microcontroller U5 outputs a high level, the third switching transistor Q7 in the first switching circuit group becomes conductive. Since the emitter of the third switching transistor Q7 in the first switching circuit group is grounded, the second pin of the first switching transistor Q1 in the first switching circuit group is set to a low level, while the collector of the first switching transistor Q1 is set to a high level. When the first pin of microcontroller U5 outputs a low level, the third switching transistor Q7 in the first switching circuit group cannot become conductive; that is, the third switching transistor Q7 in the first switching circuit group is in the off state.In this case, there is no voltage difference between the first and second terminals of the first switching transistor Q1 in the first switching circuit group, so the first switching transistor Q1 in the first switching circuit group is off. It is evident from this that the output voltage of the power supply 1, regardless of whether it is low (5V) or high (e.g., a voltage greater than 5V and less than 31V), can switch the first switching transistor Q1 either conducting or not conducting. The microcontroller U5 causes the first switching transistor Q1 and the second switching transistor Q4 to be switched on and off alternately, thereby switching the lights connected to the output terminal on or off accordingly.The present utility model achieves the control of switching unit 3 by adding a third switching transistor to the existing circuit technology, without the need for a control chip to control thyristors at high voltage, as is required in the background technology. Thus, the present utility model offers the advantages of a simpler structure and lower costs compared to the background technology. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 217789939U

[0002]

Claims

[1] Control circuit for luminaires, comprising a power supply (1), a control unit (2) and a switching unit (3) controlled by the control unit (2), wherein the output of the power supply (1) (VIN) is electrically connected to both the control unit (2) and the switching unit (3), wherein the switching unit (3) comprises three groups of circuits, each group of circuits comprising first switching transistors (Q1, Q2, Q3) and second switching transistors (Q4, Q5, Q6) controlled by the control unit (2), wherein the first terminal of the first switching transistors (Q1, Q2, Q3) is connected to the output (VIN) of the power supply (1), wherein the third terminal of the first switching transistors (Q1, Q2, Q3) is connected to the first terminal of the second switching transistors (Q4, Q5, Q6), and wherein the second terminal of the second switching transistors (Q4, Q5, Q6) is connected to the control unit (2) is connectedwhere the third terminal of the second switching transistors (Q4, Q5, Q6) is grounded, , characterized by , that each group of circuits additionally includes third switching transistors (Q7, Q8, Q9), wherein the first terminal of the third switching transistors (Q7, Q8, Q9) is connected to the second terminal of the first switching transistors (Q1, Q2, Q3), wherein the second terminal of the third switching transistors (Q7, Q8, Q9) is connected to the control unit (2), and wherein the third terminal of the third switching transistors (Q7, Q8, Q9) is grounded. [2] Control circuit for luminaires according to claim 1, characterized by, that each switching circuit further comprises first resistors (RE1, RE2, RE3) and second resistors (RD1, RD2, RD3), wherein one end of the first resistors (RE1, RE2, RE3) is connected to the output (VIN) of the power supply unit (1), wherein the other end of the first resistors (RE1, RE2, RE3) is connected to the second terminal of the first switching transistors (Q1, Q2, Q3); wherein one end of the second resistors (RD1, RD2, RD3) is connected to the second terminal of the first switching transistors (Q1, Q2, Q3), and wherein the other end of the second resistors (RD1, RD2, RD3) is connected to the first terminal of the third switching transistors (Q7, Q8, Q9). [3] Control circuit for luminaires according to claim 1 or 2, characterized by, that it further comprises third resistors (RB1, RB2, RB3) and fourth resistors (RA1, RA2, RA3), wherein one end of the third resistors (RB1, RB2, RB3) is connected to the output of the control unit (2), wherein the other end of the third resistors (RB1, RB2, RB3) is connected to the second terminal of the second switching transistors (Q4, Q5, Q6); wherein one end of the fourth resistors (RA1, RA2, RA3) is connected to the output of the control unit (2), wherein the other end of the fourth resistors (RA1, RA2, RA3) is connected to the second terminal of the third switching transistors (Q7, Q8, Q9). [4] Control circuit for luminaires according to claim 3, characterized by, that each switching circuit further comprises first diodes (D1, D3, D5) and second diodes (D2, D4, D6), wherein the anode side of the first diodes (D1, D3, D5) is connected to the third terminal of the first switching transistors (Q1, Q2, Q3), wherein the cathode side of the first diodes (D1, D3, D5) is connected to the output of the power supply unit (1) (VIN), wherein the cathode side of the second diodes (D2, D4, D6) is connected to the third terminal of the first switching transistors (Q1, Q2, Q3), and wherein the anode side of the second diodes (D2, D4, D6) is grounded. [5] Control circuit for luminaires according to claim 3 or 4, characterized by , that each switching circuit further includes capacitors (CR1, CR2, CR3), with one end of the capacitors (CR1, CR2, CR3) connected to the second terminal of the second switching transistors (Q4, Q5, Q6), with the other end of the capacitors (CR1, CR2, CR3) being grounded. [6] Control circuit for luminaires according to claims 1 to 5, characterized by , that it further comprises luminaires, wherein the luminaires comprise: a first line (4), a second line (5), a third line (6), a first LED luminaire (11), a second LED luminaire (13), a third LED luminaire (12), a fourth LED luminaire (14) and a fifth LED luminaire (21), wherein the first switching circuit group has a first output (A), wherein the second switching circuit group has a second output (B), and wherein the third switching circuit group has a third output (C); wherein the first line (4) is connected to the first output (A) in the first switching circuit group, wherein the second line (5) is connected to the second output (B) in the second switching circuit group, and wherein the third line (6) is connected to the third output (C) in the third switching circuit group; wherein the anode side of the first LED light (11) is connected to the first line (4), wherein the cathode side of the first LED light (11) is connected to the second line (5); wherein the cathode side of the second LED light (13) is connected to the first line (4), wherein the anode side of the second LED light (13) is connected to the second line (5); wherein the cathode side of the third LED light (12) is connected to the second line (5), wherein the anode side of the third LED light (12) is connected to the third line (6); wherein the anode side of the fourth LED light (14) is connected to the second line (5), wherein the cathode side of the fourth LED light (14) is connected to the third line (6); wherein the anode side of the fifth LED light (21) is connected to the first line (4), wherein the cathode side of the fifth LED light (21) is connected to the third line (6). [7] Control circuit for luminaires according to claim 6, characterized by , that the first LED light (11), the second LED light (13), the third LED light (12), the fourth LED light (14) and one or more fifth LED lights (21) are cyclically connected to the conductor to form a string of lights, wherein the first LED light (11), the second LED light (13), the third LED light (12) and the fourth LED light (14) are evenly distributed along the string of lights, wherein one or more fifth LED lights (21) are arranged next to the first LED light (11), the second LED light (13), the third LED light (12) and the fourth LED light (14) to form a backlight. [8] Control circuit for luminaires according to claim 6, characterized by, that it further comprises a sixth LED light (22), wherein the cathode side of the sixth LED light (22) is connected to the first line (4), wherein the anode side of the sixth LED light (22) is connected to the third line (6). [9] Control circuit for luminaires according to claim 8, characterized by, that the first LED light (11), the second LED light (13), the third LED light (12), the fourth LED light (14) and one or more fifth LED lights (21) and sixth LED lights (22) are cyclically connected to the conductor to form a string of lights, wherein the first LED light (11), the second LED light (13), the third LED light (12) and the fourth LED light (14) are evenly distributed along the string of lights, wherein one or more fifth LED lights (21) and sixth LED lights (22) are arranged next to the first LED light (11), the second LED light (13), the third LED light (12) and the fourth LED light (14) to form a backlight. [10] Control circuit for luminaires according to claim 9, characterized by, that the fifth LED light (21) and the sixth LED light (22) are encapsulated together or that the fifth LED light (21) and the sixth LED light (22) represent two antiparallel connected LEDs in a two-color light.

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