A silicon controlled rectifier dimming and color tuning drive circuit

Abstract

This utility model relates to the field of thyristor dimming and color adjustment technology, and particularly to a thyristor dimming and color adjustment driving circuit, including an MCU main control unit, a compatible thyristor dimming unit, a color temperature switching unit, a wall-cut signal detection unit, and a thyristor dimmer status detection unit. The MCU main control unit is electrically connected to the compatible thyristor dimming unit, the color temperature switching unit, the wall-cut signal detection unit, and the thyristor dimmer status detection unit. The color temperature switching unit is electrically connected to the compatible thyristor dimming unit and the wall-cut signal detection unit. The thyristor dimmer status detection unit is electrically connected to the wall-cut signal detection unit. The wall-cut signal detection unit is used to detect the number of times the wall switch is turned on. The compatible thyristor dimming unit is electrically connected to an external dimmer to detect the dimmer's working status. This circuit design can achieve compatibility with traditional thyristor dimmers and can achieve diverse functions and color temperature adjustment through simple operation.

Description

Technical Field

[0001] This utility model relates to the field of silicon controlled rectifier (SCR) dimming and color tuning technology, and in particular to a SCR dimming and color tuning drive circuit. Background Technology

[0002] In the lighting field, SCR dimmers are widely used in traditional lighting systems due to their advantages such as low cost and ease of operation. However, with the development of LED lighting technology, compatibility issues between traditional SCR dimmers and LED dimming and color-tuning drive circuits have gradually become prominent.

[0003] Most existing LED lights compatible with SCR dimming use SCR dimmers for dimming, but cannot adjust color temperature using SCR dimmers. Some solutions using SCRs can achieve dimming and color adjustment, but the circuits are complex and the cost is high. Therefore, there is an urgent need for a drive circuit that is compatible with traditional SCR dimmers and can achieve diverse functions and color temperature adjustment through simple operation. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a silicon controlled rectifier (SCR) dimming and color tuning drive circuit that is compatible with traditional SCR dimmers and can achieve diverse functions and color temperature adjustment through simple operation.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A thyristor-controlled dimming and color-tuning driving circuit includes an MCU main control unit, a thyristor-compatible dimming unit, a color temperature switching unit, a wall-cut signal detection unit, and a thyristor dimmer status detection unit. The MCU main control unit is electrically connected to the color temperature switching unit, the wall-cut signal detection unit, and the thyristor dimmer status detection unit, respectively. The color temperature switching unit is electrically connected to both the thyristor-compatible dimming unit and the MCU main control unit, respectively. The thyristor dimmer status detection unit is electrically connected to the MCU main control unit.

[0007] The wall switch signal detection unit is used to detect the number of times the wall switch is turned on, and the MCU main control unit switches to different functions according to the number of times the wall switch is turned on;

[0008] The compatible silicon controlled rectifier dimming unit is electrically connected to the external dimmer to detect the dimmer's working status. The MCU main control unit adjusts the output color mixing signal according to the different states of the dimmer being turned on, and transmits the color mixing signal to the color temperature switching unit to realize the color temperature change.

[0009] Furthermore, the MCU main control unit includes a chip IC1, the model of which is CM9M131B. The first pin of the chip IC1 is connected to a preset power supply, the fourth pin of the chip IC1 is electrically connected to a wall-cut signal detection unit, the fifth pin of the chip IC1 is electrically connected to a color temperature switching unit, the sixth pin of the chip IC1 is electrically connected to a thyristor dimmer status detection unit, and the eighth pin of the chip IC1 is grounded.

[0010] Furthermore, the wall-cut signal detection unit includes resistors R58, R59, and R60, and capacitor C7. One end of capacitor C7 is electrically connected to the MCU main control unit, one end of resistor R60, and one end of resistor R59, respectively. The other end of capacitor C7 is electrically connected to one end of resistor R60, and both the other end of capacitor C7 and one end of resistor R60 are grounded. The other end of resistor R59 is electrically connected to one end of resistor R58.

[0011] Furthermore, the thyristor dimmer status detection unit includes resistors R50, R51, R52, R53, R54, R55, R56, R57, capacitor C6, transistor V2, and transistor V3.

[0012] The base of transistor V2 is electrically connected to one end of resistor R51 and one end of resistor R52, respectively. The other end of resistor R51 is electrically connected to one end of resistor R50. The collector of transistor V2 is electrically connected to one end of resistor R53 and the base of transistor V3, respectively. The collector of transistor V3 is electrically connected to one end of resistor R55 and one end of resistor R54, respectively. The other end of resistor R53 is electrically connected to the other end of resistor R54, and both the other ends of resistor R53 and resistor R54 are connected to a preset... The power supply is provided, with the other end of resistor R55 electrically connected to one end of resistor R57, one end of resistor R56, and one end of capacitor C6, respectively. The other end of resistor R56 is electrically connected to the MCU main control unit. The other end of resistor R52 is electrically connected to the emitter of transistor V2, the emitter of transistor V3, the other end of resistor R57, and the other end of capacitor C6, respectively. The other ends of resistor R52, the emitters of transistor V2 and V3, the other ends of resistor R57, and the other ends of capacitor C6 are all grounded.

[0013] Furthermore, the color temperature switching unit includes resistor R21, resistor R22, diode D3, capacitor C2, resistor R23, resistor R26, capacitor C3, chip IC5, light-emitting diode W1, light-emitting diode W24, light-emitting diode A1, and light-emitting diode A24.

[0014] The chip IC5 is model BP5936D. Its first pin is electrically connected to the cathode of diode D3 and one end of capacitor C2. The anode of diode D3 is electrically connected to one end of resistor R22. The other end of resistor R22 is electrically connected to one end of resistor R21. The other end of resistor R21 is electrically connected to the anodes of LED A1 and W1, one end of resistor R23, and a compatible SCR dimming unit. The second pin of chip IC5 is electrically connected to the other end of capacitor C2 and the compatible SCR dimming unit. The third pin of chip IC5 is... The cathode of LED A24 is electrically connected. The fourth pin of chip IC5 is electrically connected to the cathode of LED W24. The cathode of LED W1 is electrically connected to the anode of LED W24. The cathode of LED A1 is electrically connected to the anode of LED A24. The sixth pin of chip IC5 is electrically connected to the MCU main control unit. The seventh pin of chip IC5 is electrically connected to one end of resistor R26 and one end of capacitor C3. The other end of resistor R26 is electrically connected to the other end of resistor R23. The eighth pin of chip IC5 and the other end of capacitor C3 are both grounded.

[0015] Furthermore, the color temperature switching unit also includes a Zener diode ZD2. The cathode of the Zener diode ZD2 is electrically connected to one end of the resistor R26, one end of the capacitor C3, and the seventh pin of the chip IC5, respectively. The anode of the Zener diode ZD2 is electrically connected to the other end of the capacitor C3, and the anode of the Zener diode ZD2 is grounded.

[0016] Furthermore, the compatible silicon controlled rectifier dimming unit includes diode D1, resistors R12, R13, R14, electrolytic capacitor E3, resistors R17, R6, R7, R10, and chip IC3.

[0017] The chip IC3 is model BP5178GCL. The first pin of chip IC3 is electrically connected to one end of resistor R12. The other end of resistor R12 is electrically connected to one end of resistor R13 and the anode of diode D1. The second pin of chip IC3 is electrically connected to the cathode of diode D1, one end of electrolytic capacitor E3, and the color temperature switching unit. The third pin of chip IC3 is electrically connected to one end of resistor R6. The fourth pin of chip IC3 is electrically connected to the other end of resistor R6 and one end of resistor R10. The other end of resistor R7 is electrically connected to the other end of resistor R10, and both the other ends of resistor R7 and resistor R10 are grounded. The fifth pin of chip IC3 is electrically connected to one end of resistor R17. The sixth and ninth pins of chip IC3 are both grounded. The seventh pin of chip IC3 is electrically connected to the other end of resistor R17, the other end of electrolytic capacitor E3, and the color temperature switching unit, respectively. The eighth pin of chip IC3 is electrically connected to one end of resistor R14. The other end of resistor R14 is electrically connected to the other end of resistor R13.

[0018] Furthermore, it also includes an MCU power supply unit, which is electrically connected to the MCU main control unit, the wall-cut signal detection unit, and the compatible thyristor dimming unit.

[0019] Furthermore, the MCU power supply unit includes chip IC2, inductor L1, electrolytic capacitor E1, resistor R1, electrolytic capacitor E2, inductor L2, resistor R2 and diode D4;

[0020] The model of the chip IC2 is BP8521C. The first pin of the chip IC2 is electrically connected to one end of the electrolytic capacitor E1, one end of the inductor L1, one end of the resistor R1, and the MCU main control unit. The other end of the electrolytic capacitor E1 is electrically connected to the other end of the resistor R1, and both the other ends of the electrolytic capacitor E1 and the resistor R1 are grounded. The second pin of the chip IC2 is electrically connected to one end of the electrolytic capacitor E2, and both the second pin of the chip IC2 and one end of the electrolytic capacitor E2 are grounded. The fourth pin of the chip IC2 is electrically connected to the other end of the electrolytic capacitor E2, one end of the inductor L2, and one end of the resistor R2. The other end of the inductor L2 is electrically connected to the other end of the resistor R2 and the cathode of the diode D4. The anode of the diode D4 is electrically connected to the compatible silicon controlled rectifier dimming unit. The fifth pin of the chip IC2 is electrically connected to the other end of the inductor L1.

[0021] Furthermore, it also includes an input rectification and filtering unit, which is electrically connected to the compatible silicon controlled rectifier dimming unit and the wall-cut signal detection unit, respectively.

[0022] The beneficial effects of this utility model are as follows:

[0023] This solution incorporates an MCU main control unit, a compatible SCR dimming unit, a color temperature switching unit, a wall-cut signal detection unit, and a SCR dimmer status detection unit. The wall-cut signal detection unit detects the number of times the wall switch is turned on, and the MCU main control unit switches to different functions based on this frequency. This eliminates the need for additional equipment; users can easily control scene modes (such as reading mode and sleep mode) and group lighting by simply operating the wall switch, greatly enhancing ease of use and user experience, lowering the operational threshold, and making lighting control more aligned with daily habits. The compatible SCR dimming unit is electrically connected to the external dimmer to detect its operating status. The MCU main control unit adjusts the output color mixing signal based on the dimmer's different states and transmits the mixed signal to the color temperature switching unit to achieve color temperature changes. This effectively solves the problem of poor compatibility between traditional SCR dimmers and LED driver circuits, enabling not only smooth dimming but also precise color temperature adjustment based on different dimmer states. To meet users' diverse needs for lighting brightness and ambiance in different scenarios and improve lighting quality, this solution features interconnected units that form an efficient collaborative working mechanism. The color temperature switching unit is connected to the compatible SCR dimming unit and the wall-cut signal detection unit, respectively. The SCR dimmer status detection unit is also connected to the wall-cut signal detection unit, enabling the MCU main control unit to integrate wall switch operation information and dimmer operating status to more intelligently control the lights. This allows for functions such as rapid color temperature switching based on switch operations and dynamic adjustment of the color mixing signal based on dimmer status, further optimizing the user's lighting experience and improving the intelligence of the drive circuit. The SCR dimmer status detection unit monitors the dimmer's operating status in real time, providing accurate feedback to the MCU main control unit. This enables the drive circuit to promptly detect dimmer abnormalities (such as malfunctions or abnormal power outages) and take appropriate action, preventing unstable lighting control due to dimmer status changes, ensuring stable operation of the lighting system, and extending the lifespan of the circuit and luminaires. Attached Figure Description

[0024] Figure 1 This is a connection block diagram of the thyristor dimming and color-tuning drive circuit of this utility model;

[0025] Figure 2 This is a circuit diagram of the thyristor dimming and color-tuning drive circuit of this utility model.

[0026] Label Explanation:

[0027] 1. Input rectifier and filter unit; 2. MCU power supply unit; 3. Compatible SCR dimming unit; 4. Color temperature switching unit; 5. Wall-cut signal detection unit; 6. SCR dimmer status detection unit; 7. MCU main control unit. Detailed Implementation

[0028] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0029] Please refer to Figure 1 A thyristor-controlled dimming and color-tuning driving circuit includes an MCU main control unit, a thyristor-compatible dimming unit, a color temperature switching unit, a wall-cut signal detection unit, and a thyristor dimmer status detection unit. The MCU main control unit is electrically connected to the color temperature switching unit, the wall-cut signal detection unit, and the thyristor dimmer status detection unit, respectively. The color temperature switching unit is electrically connected to both the thyristor-compatible dimming unit and the MCU main control unit, respectively. The thyristor dimmer status detection unit is electrically connected to the MCU main control unit.

[0030] The wall switch signal detection unit is used to detect the number of times the wall switch is turned on, and the MCU main control unit switches to different functions according to the number of times the wall switch is turned on;

[0031] The compatible silicon controlled rectifier dimming unit is electrically connected to the external dimmer to detect the dimmer's working status. The MCU main control unit adjusts the output color mixing signal according to the different states of the dimmer being turned on, and transmits the color mixing signal to the color temperature switching unit to realize the color temperature change.

[0032] As can be seen from the above description, the beneficial effects of this utility model are as follows:

[0033] This solution incorporates an MCU main control unit, a compatible SCR dimming unit, a color temperature switching unit, a wall-cut signal detection unit, and a SCR dimmer status detection unit. The wall-cut signal detection unit detects the number of times the wall switch is turned on, and the MCU main control unit switches to different functions based on this frequency. This eliminates the need for additional equipment; users can easily control scene modes (such as reading mode and sleep mode) and group lighting by simply operating the wall switch, greatly enhancing ease of use and user experience, lowering the operational threshold, and making lighting control more aligned with daily habits. The compatible SCR dimming unit is electrically connected to the external dimmer to detect its operating status. The MCU main control unit adjusts the output color mixing signal based on the dimmer's different states and transmits the mixed signal to the color temperature switching unit to achieve color temperature changes. This effectively solves the problem of poor compatibility between traditional SCR dimmers and LED driver circuits, enabling not only smooth dimming but also precise color temperature adjustment based on different dimmer states. To meet users' diverse needs for lighting brightness and ambiance in different scenarios and improve lighting quality, this solution features interconnected units that form an efficient collaborative working mechanism. The color temperature switching unit is connected to the compatible SCR dimming unit and the wall-cut signal detection unit, respectively. The SCR dimmer status detection unit is also connected to the wall-cut signal detection unit, enabling the MCU main control unit to integrate wall switch operation information and dimmer operating status to more intelligently control the lights. This allows for functions such as rapid color temperature switching based on switch operations and dynamic adjustment of the color mixing signal based on dimmer status, further optimizing the user's lighting experience and improving the intelligence of the drive circuit. The SCR dimmer status detection unit monitors the dimmer's operating status in real time, providing accurate feedback to the MCU main control unit. This enables the drive circuit to promptly detect dimmer abnormalities (such as malfunctions or abnormal power outages) and take appropriate action, preventing unstable lighting control due to dimmer status changes, ensuring stable operation of the lighting system, and extending the lifespan of the circuit and luminaires.

[0034] Furthermore, the MCU main control unit includes a chip IC1, the model of which is CM9M131B. The first pin of the chip IC1 is connected to a preset power supply, the fourth pin of the chip IC1 is electrically connected to a wall-cut signal detection unit, the fifth pin of the chip IC1 is electrically connected to a color temperature switching unit, the sixth pin of the chip IC1 is electrically connected to a thyristor dimmer status detection unit, and the eighth pin of the chip IC1 is grounded.

[0035] As can be seen from the above description, chip IC1 acts as the main controller, connecting the wall-cut signal detection unit and the thyristor dimmer status detection unit, and adjusting the output signal to the color temperature switching unit based on the received data.

[0036] Furthermore, the wall-cut signal detection unit includes resistors R58, R59, and R60, and capacitor C7. One end of capacitor C7 is electrically connected to the MCU main control unit, one end of resistor R60, and one end of resistor R59, respectively. The other end of capacitor C7 is electrically connected to one end of resistor R60, and both the other end of capacitor C7 and one end of resistor R60 are grounded. The other end of resistor R59 is electrically connected to one end of resistor R58.

[0037] As can be seen from the above description, resistors R58, R59 and R60 form a voltage divider circuit, which converts the higher voltage signal into a lower voltage signal, and then filters it through capacitor C7 before sending the switching signal to chip IC1 for identification.

[0038] Furthermore, the thyristor dimmer status detection unit includes resistors R50, R51, R52, R53, R54, R55, R56, R57, capacitor C6, transistor V2, and transistor V3.

[0039] The base of transistor V2 is electrically connected to one end of resistor R51 and one end of resistor R52, respectively. The other end of resistor R51 is electrically connected to one end of resistor R50. The collector of transistor V2 is electrically connected to one end of resistor R53 and the base of transistor V3, respectively. The collector of transistor V3 is electrically connected to one end of resistor R55 and one end of resistor R54, respectively. The other end of resistor R53 is electrically connected to the other end of resistor R54, and both the other ends of resistor R53 and resistor R54 are connected to a preset... The power supply is provided, with the other end of resistor R55 electrically connected to one end of resistor R57, one end of resistor R56, and one end of capacitor C6, respectively. The other end of resistor R56 is electrically connected to the MCU main control unit. The other end of resistor R52 is electrically connected to the emitter of transistor V2, the emitter of transistor V3, the other end of resistor R57, and the other end of capacitor C6, respectively. The other ends of resistor R52, the emitters of transistor V2 and V3, the other ends of resistor R57, and the other ends of capacitor C6 are all grounded.

[0040] As described above, the thyristor dimmer status detection unit is used to detect the operating status of the thyristor. Resistors R50, R51, and R52 detect the positive voltage status after rectifier bridge BR1. When the voltage across resistor R52 reaches the base turn-on voltage of transistor V2, transistor V2 turns on, pulling down the base voltage of transistor V3, and transistor V3 does not turn on. The 3.3V voltage is divided by resistors R54, R55, and R57 to charge capacitor C6; conversely, when the voltage reaches the base turn-on voltage of transistor V2, the thyristor dimmer turns off. The voltage across resistor R52 does not reach the base turn-on voltage of transistor V2, so transistor V2 is not conducting. At this time, the base of transistor V3 is pulled high through resistor R53, and transistor V3 is conducting. The 3.3V voltage cannot charge capacitor C6 through resistor R54. Therefore, there is a voltage signal on capacitor C6 that changes with the opening angle of the SCR dimmer. This signal is transmitted to the wall-cut signal detection unit through resistor R56 for detection, so as to adjust the output color temperature PWM signal according to the voltage signal.

[0041] Furthermore, the color temperature switching unit includes resistor R21, resistor R22, diode D3, capacitor C2, resistor R23, resistor R26, capacitor C3, chip IC5, light-emitting diode W1, light-emitting diode W24, light-emitting diode A1, and light-emitting diode A24.

[0042] The chip IC5 is model BP5936D. Its first pin is electrically connected to the cathode of diode D3 and one end of capacitor C2. The anode of diode D3 is electrically connected to one end of resistor R22. The other end of resistor R22 is electrically connected to one end of resistor R21. The other end of resistor R21 is electrically connected to the anodes of LED A1 and W1, one end of resistor R23, and a compatible SCR dimming unit. The second pin of chip IC5 is electrically connected to the other end of capacitor C2 and the compatible SCR dimming unit. The third pin of chip IC5 is... The cathode of LED A24 is electrically connected. The fourth pin of chip IC5 is electrically connected to the cathode of LED W24. The cathode of LED W1 is electrically connected to the anode of LED W24. The cathode of LED A1 is electrically connected to the anode of LED A24. The sixth pin of chip IC5 is electrically connected to the MCU main control unit. The seventh pin of chip IC5 is electrically connected to one end of resistor R26 and one end of capacitor C3. The other end of resistor R26 is electrically connected to the other end of resistor R23. The eighth pin of chip IC5 and the other end of capacitor C3 are both grounded.

[0043] As described above, the first pin of chip IC5 is connected to resistors R21 and R22 and diode D3 to obtain high-voltage power supply. The seventh pin of chip IC5 is connected to a low-voltage power supply circuit composed of resistors R23 and R26, capacitor C3 and Zener diode ZD1 to ensure the operating voltage of chip IC5. The third and fourth pins of chip IC5 are respectively connected to the negative terminals of two LED beads (i.e., light-emitting diode W1, light-emitting diode W24, light-emitting diode A1 and light-emitting diode A24). The sixth pin of chip IC5 adjusts the turn-on ratio of the third and fourth pins of chip IC5 according to the PWM signal received from the wall-cut signal detection unit.

[0044] Furthermore, the color temperature switching unit also includes a Zener diode ZD2. The cathode of the Zener diode ZD2 is electrically connected to one end of the resistor R26, one end of the capacitor C3, and the seventh pin of the chip IC5, respectively. The anode of the Zener diode ZD2 is electrically connected to the other end of the capacitor C3, and the anode of the Zener diode ZD2 is grounded.

[0045] As can be seen from the above description, the Zener diode ZD2 can prevent surge voltage from damaging the seventh pin of chip IC5.

[0046] Furthermore, the compatible silicon controlled rectifier dimming unit includes diode D1, resistors R12, R13, R14, electrolytic capacitor E3, resistors R17, R6, R7, R10, and chip IC3.

[0047] The chip IC3 is model BP5178GCL. The first pin of chip IC3 is electrically connected to one end of resistor R12. The other end of resistor R12 is electrically connected to one end of resistor R13 and the anode of diode D1. The second pin of chip IC3 is electrically connected to the cathode of diode D1, one end of electrolytic capacitor E3, and the color temperature switching unit. The third pin of chip IC3 is electrically connected to one end of resistor R6. The fourth pin of chip IC3 is electrically connected to the other end of resistor R6 and one end of resistor R10. The other end of resistor R7 is electrically connected to the other end of resistor R10, and both the other ends of resistor R7 and resistor R10 are grounded. The fifth pin of chip IC3 is electrically connected to one end of resistor R17. The sixth and ninth pins of chip IC3 are both grounded. The seventh pin of chip IC3 is electrically connected to the other end of resistor R17, the other end of electrolytic capacitor E3, and the color temperature switching unit, respectively. The eighth pin of chip IC3 is electrically connected to one end of resistor R14. The other end of resistor R14 is electrically connected to the other end of resistor R13.

[0048] As described above, the first pin of chip IC3 is connected to resistor R12 for detecting dimmer signals; the second pin of chip IC3 is connected to the cathode of diode D1, and the eighth pin of chip IC3 is connected to resistors R13 and R14, both for obtaining high-voltage power supply; the third and fourth pins of chip IC3 are connected to resistors R6, R7, and R10 respectively for current sampling; and the seventh pin of chip IC3 is connected to electrolytic capacitor E3 to power the color temperature switching unit.

[0049] Furthermore, it also includes an MCU power supply unit, which is electrically connected to the MCU main control unit, the wall-cut signal detection unit, and the compatible thyristor dimming unit.

[0050] Furthermore, the MCU power supply unit includes chip IC2, inductor L1, electrolytic capacitor E1, resistor R1, electrolytic capacitor E2, inductor L2, resistor R2 and diode D4;

[0051] The model of the chip IC2 is BP8521C. The first pin of the chip IC2 is electrically connected to one end of the electrolytic capacitor E1, one end of the inductor L1, one end of the resistor R1, and the MCU main control unit. The other end of the electrolytic capacitor E1 is electrically connected to the other end of the resistor R1, and both the other ends of the electrolytic capacitor E1 and the resistor R1 are grounded. The second pin of the chip IC2 is electrically connected to one end of the electrolytic capacitor E2, and both the second pin of the chip IC2 and one end of the electrolytic capacitor E2 are grounded. The fourth pin of the chip IC2 is electrically connected to the other end of the electrolytic capacitor E2, one end of the inductor L2, and one end of the resistor R2. The other end of the inductor L2 is electrically connected to the other end of the resistor R2 and the cathode of the diode D4. The anode of the diode D4 is electrically connected to the compatible silicon controlled rectifier dimming unit. The fifth pin of the chip IC2 is electrically connected to the other end of the inductor L1.

[0052] Furthermore, it also includes an input rectification and filtering unit, which is electrically connected to the compatible silicon controlled rectifier dimming unit and the wall-cut signal detection unit, respectively.

[0053] Please refer to Figure 1 and Figure 2 As shown, Embodiment 1 of this utility model is as follows:

[0054] Please refer to Figure 1A thyristor-controlled dimming and color-tuning driving circuit includes an MCU main control unit 7, a thyristor-compatible dimming unit 3, a color temperature switching unit 4, a wall-cut signal detection unit 5, and a thyristor dimmer status detection unit 6. The MCU main control unit 7 is electrically connected to the color temperature switching unit 4, the wall-cut signal detection unit 5, and the thyristor dimmer status detection unit 6, respectively. The color temperature switching unit 4 is electrically connected to the thyristor-compatible dimming unit 3 and the MCU main control unit 7, respectively. The thyristor dimmer status detection unit 6 is electrically connected to the MCU main control unit 7.

[0055] The wall switch signal detection unit 5 is used to detect the number of times the wall switch is turned on, and the MCU main control unit 7 switches to different functions according to the number of times the wall switch is turned on.

[0056] The compatible silicon controlled rectifier dimming unit 3 is electrically connected to the external dimmer to detect the working status of the dimmer. The MCU main control unit 7 adjusts the output color mixing signal according to the different states of the dimmer and transmits the color mixing signal to the color temperature switching unit 4 to realize the color temperature change.

[0057] Please refer to Figure 2 The MCU main control unit 7 includes a chip IC1, the model of which is CM9M131B. The first pin of the chip IC1 is connected to a preset power supply, the fourth pin of the chip IC1 is electrically connected to the wall-cut signal detection unit 5, the fifth pin of the chip IC1 is electrically connected to the color temperature switching unit 4, the sixth pin of the chip IC1 is electrically connected to the thyristor dimmer status detection unit 6, and the eighth pin of the chip IC1 is grounded.

[0058] The MCU main control unit 7 also includes a capacitor C1. One end of the capacitor C1 is electrically connected to the first pin of the chip IC1, and the other end of the capacitor C1 is electrically connected to the eighth pin of the chip IC1. Both the other end of the capacitor C1 and the eighth pin of the chip IC1 are grounded.

[0059] Please refer to Figure 2 The wall-cut signal detection unit 5 includes resistors R58, R59, R60 and capacitor C7. One end of capacitor C7 is electrically connected to the MCU main control unit 7, one end of resistor R60 and one end of resistor R59 respectively. The other end of capacitor C7 is electrically connected to one end of resistor R60 and both the other end of capacitor C7 and one end of resistor R60 are grounded. The other end of resistor R59 is electrically connected to one end of resistor R58.

[0060] Please refer to Figure 2 The thyristor dimmer status detection unit 6 includes resistors R50, R51, R52, R53, R54, R55, R56, R57, capacitor C6, transistor V2, and transistor V3.

[0061] The base of transistor V2 is electrically connected to one end of resistor R51 and one end of resistor R52, respectively. The other end of resistor R51 is electrically connected to one end of resistor R50. The collector of transistor V2 is electrically connected to one end of resistor R53 and the base of transistor V3, respectively. The collector of transistor V3 is electrically connected to one end of resistor R55 and one end of resistor R54, respectively. The other end of resistor R53 is electrically connected to the other end of resistor R54, and both the other ends of resistor R53 and resistor R54 are connected to a preset voltage. The other end of resistor R55 is electrically connected to one end of resistor R57, one end of resistor R56 and one end of capacitor C6 respectively. The other end of resistor R56 is electrically connected to MCU main control unit 7. The other end of resistor R52 is electrically connected to the emitter of transistor V2, the emitter of transistor V3, the other end of resistor R57 and the other end of capacitor C6 respectively, and the other end of resistor R52, the emitter of transistor V2, the emitter of transistor V3, the other end of resistor R57 and the other end of capacitor C6 are all grounded.

[0062] Please refer to Figure 2 The color temperature switching unit 4 includes resistor R21, resistor R22, diode D3, capacitor C2, resistor R23, resistor R26, capacitor C3, chip IC5, light-emitting diode W1, light-emitting diode W24, light-emitting diode A1 and light-emitting diode A24.

[0063] The chip IC5 is model BP5936D. Its first pin is electrically connected to the cathode of diode D3 and one end of capacitor C2. The anode of diode D3 is electrically connected to one end of resistor R22. The other end of resistor R22 is electrically connected to one end of resistor R21. The other end of resistor R21 is electrically connected to the anodes of LED A1 and W1, one end of resistor R23, and the compatible SCR dimming unit 3. The second pin of chip IC5 is electrically connected to the other end of capacitor C2 and the compatible SCR dimming unit 3. The third pin of chip IC5... The cathode of LED A24 is electrically connected to the cathode of LED W24. The cathode of LED W1 is electrically connected to the anode of LED W24. The cathode of LED A1 is electrically connected to the anode of LED A24. The sixth pin of chip IC5 is electrically connected to MCU main control unit 7. The seventh pin of chip IC5 is electrically connected to one end of resistor R26 and one end of capacitor C3. The other end of resistor R26 is electrically connected to the other end of resistor R23. The eighth pin of chip IC5 and the other end of capacitor C3 are both grounded.

[0064] Please refer to Figure 2The color temperature switching unit 4 also includes a Zener diode ZD2. The cathode of the Zener diode ZD2 is electrically connected to one end of the resistor R26, one end of the capacitor C3, and the seventh pin of the chip IC5. The anode of the Zener diode ZD2 is electrically connected to the other end of the capacitor C3 and the anode of the Zener diode ZD2 is grounded.

[0065] Please refer to Figure 2 The compatible silicon controlled rectifier dimming unit 3 includes diode D1, resistor R12, resistor R13, resistor R14, electrolytic capacitor E3, resistor R17, resistor R6, resistor R7, resistor R10 and chip IC3.

[0066] The chip IC3 is model BP5178GCL. The first pin of chip IC3 is electrically connected to one end of resistor R12. The other end of resistor R12 is electrically connected to one end of resistor R13 and the anode of diode D1. The second pin of chip IC3 is electrically connected to the cathode of diode D1, one end of electrolytic capacitor E3, and color temperature switching unit 4. The third pin of chip IC3 is electrically connected to one end of resistor R6. The fourth pin of chip IC3 is electrically connected to the other end of resistor R6 and one end of resistor R10. The other end of resistor R7 is electrically connected to the other end of resistor R10, and both the other ends of resistor R7 and resistor R10 are grounded. The fifth pin of chip IC3 is electrically connected to one end of resistor R17. The sixth and ninth pins of chip IC3 are both grounded. The seventh pin of chip IC3 is electrically connected to the other end of resistor R17, the other end of electrolytic capacitor E3, and color temperature switching unit 4, respectively. The eighth pin of chip IC3 is electrically connected to one end of resistor R14. The other end of resistor R14 is electrically connected to the other end of resistor R13.

[0067] Please refer to Figure 1 It also includes an MCU power supply unit 2, which is electrically connected to the MCU main control unit 7, the wall-cut signal detection unit 5 and the compatible thyristor dimming unit 3 respectively.

[0068] Please refer to Figure 2 The MCU power supply unit 2 includes a chip IC2, an inductor L1, an electrolytic capacitor E1, a resistor R1, an electrolytic capacitor E2, an inductor L2, a resistor R2, and a diode D4.

[0069] The model of the chip IC2 is BP8521C. The first pin of the chip IC2 is electrically connected to one end of the electrolytic capacitor E1, one end of the inductor L1, one end of the resistor R1, and the MCU main control unit 7. The other end of the electrolytic capacitor E1 is electrically connected to the other end of the resistor R1, and both the other ends of the electrolytic capacitor E1 and the resistor R1 are grounded. The second pin of the chip IC2 is electrically connected to one end of the electrolytic capacitor E2, and both the second pin of the chip IC2 and one end of the electrolytic capacitor E2 are grounded. The fourth pin of the chip IC2 is electrically connected to the other end of the electrolytic capacitor E2, one end of the inductor L2, and one end of the resistor R2. The other end of the inductor L2 is electrically connected to the other end of the resistor R2 and the cathode of the diode D4. The anode of the diode D4 is electrically connected to the compatible silicon controlled rectifier dimming unit 3. The fifth pin of the chip IC2 is electrically connected to the other end of the inductor L1.

[0070] Please refer to Figure 1 It also includes an input rectifier and filter unit 1, which is electrically connected to the compatible silicon controlled rectifier dimming unit 3 and the wall-cut signal detection unit 5, respectively.

[0071] The input rectifier and filter unit 1 includes a rectifier bridge BR1, a varistor RV1, and a fuse resistor FR1. For the specific connection relationships between these components, please refer to [reference needed]. Figure 2 .

[0072] The preset power supply in this embodiment is 3.3V.

[0073] The working principle of the aforementioned thyristor dimming and color-tuning drive circuit is as follows:

[0074] Alternating current is converted into pulsating direct current through fuse resistor FR1 and rectifier bridge BR1. Fuse resistor FR1 provides circuit fault protection, and varistor RV1 absorbs surges and protects the downstream circuit.

[0075] The MCU power supply unit 2 mainly provides the working voltage or reference voltage for the MCU main control unit 7, the wall-cut signal detection unit 5, and the compatible thyristor dimming unit 3; the positive output of the rectifier bridge BR1 is connected to the diode D4, which charges the electrolytic capacitor E2 through the inductor L2, providing the working power for the chip IC2. The chip IC2, the inductor L1, and the electrolytic capacitor E1 form a step-down constant voltage output circuit, providing the chip IC1 with a working voltage of 3.3V; resistors R1 and R2 are release resistors used to release the energy on the capacitor and inductor.

[0076] The first pin of chip IC3 is connected to resistor R12 for detecting dimmer signals; the second pin of chip IC3 is connected to the cathode of diode D1, and the eighth pin of chip IC3 is connected to resistors R13 and R14, both for obtaining high-voltage power supply; the third and fourth pins of chip IC3 are connected to resistors R6, R7, and R10 respectively for current sampling; the seventh pin of chip IC3 is connected to electrolytic capacitor E3 to power LEDs W1, W24, A1, and A24.

[0077] The first pin of chip IC5 is connected to resistors R21 and R22 and diode D3 to obtain high voltage power supply. The seventh pin of chip IC5 is connected to a low voltage power supply circuit composed of resistors R23 and R26, capacitor C3 and Zener diode ZD1 to ensure the operating voltage of chip IC5. The third and fourth pins of chip IC5 are respectively connected to the negative terminals of two LED beads (i.e., light-emitting diode W1, light-emitting diode W24, light-emitting diode A1 and light-emitting diode A24). The sixth pin of chip IC5 adjusts the turn-on ratio of the third and fourth pins of chip IC5 according to the PWM signal received from chip IC1.

[0078] The wall-cut signal detection unit 5 sends the switch signal to chip IC1 for identification after passing through resistors R58, R59 and R60 and then through capacitor C7 for filtering.

[0079] The thyristor dimmer status detection unit 6 is used to detect the operating status of the thyristor. Resistors R50, R51, and R52 detect the positive voltage status after rectifier bridge BR1. When the voltage across resistor R52 reaches the base turn-on voltage of transistor V2, transistor V2 turns on, pulling down the base voltage of transistor V3, and transistor V3 does not turn on. The 3.3V voltage is divided by resistors R54, R55, and R57 to charge capacitor C6; conversely, when resistor R... The voltage on resistor R52 does not reach the base turn-on voltage of transistor V2, so transistor V2 is not turned on. At this time, the base of transistor V3 is pulled high through resistor R53, and transistor V3 is turned on. The 3.3V voltage cannot charge capacitor C6 through resistor R54. Therefore, there is a voltage signal on capacitor C6 that changes with the opening angle of the SCR dimmer. This signal is transmitted to chip IC1 through resistor R56 for detection, so as to adjust the output color temperature PWM signal according to the voltage signal.

[0080] In summary, this utility model provides a SCR dimming and color-tuning drive circuit. By setting up an MCU main control unit, a compatible SCR dimming unit, a color temperature switching unit, a wall-cut signal detection unit, and a SCR dimmer status detection unit, the wall-cut signal detection unit detects the number of times the wall switch is turned on. The MCU main control unit switches to different functions based on the number of times the wall switch is turned on. This allows users to achieve functions such as scene mode switching (e.g., reading mode, sleep mode) and light group control simply by operating the wall switch, without additional equipment. This greatly improves the convenience and enjoyment of use, lowers the operating threshold, and makes lighting control more in line with daily usage habits. The compatible SCR dimming unit is electrically connected to the external dimmer to detect its working status. The MCU main control unit adjusts the output color mixing signal according to the different states of the dimmer and transmits the color mixing signal to the color temperature switching unit to achieve color temperature change. This effectively solves the problem of poor compatibility between traditional SCR dimmers and LED driver circuits, achieving not only smooth dimming but also color temperature adjustment based on the dimmer's status. Precise color temperature adjustment under different states meets diverse user needs for lighting brightness and atmosphere in various scenarios, improving lighting quality. The various units in this solution are electrically interconnected, forming an efficient collaborative working mechanism. The color temperature switching unit is connected to the compatible SCR dimming unit and the wall-cut signal detection unit, respectively. The SCR dimmer status detection unit is also connected to the wall-cut signal detection unit, enabling the MCU main control unit to comprehensively integrate wall switch operation information and dimmer operating status for more intelligent light control. This allows for functions such as rapid color temperature switching based on switch operations and dynamic adjustment of the color mixing signal based on dimmer status, further optimizing the user's lighting experience and improving the intelligence of the drive circuit. The SCR dimmer status detection unit monitors the dimmer's operating status in real time, providing accurate feedback to the MCU main control unit. This allows the drive circuit to promptly detect dimmer anomalies (such as malfunctions or abnormal power outages) and take appropriate action, preventing unstable light control due to dimmer status changes, ensuring stable operation of the lighting system, and extending the lifespan of the circuit and luminaires.

[0081] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A thyristor-controlled dimming and color-tuning driving circuit, characterized in that, It includes an MCU main control unit, a compatible SCR dimming unit, a color temperature switching unit, a wall-cut signal detection unit, and a SCR dimmer status detection unit. The MCU main control unit is electrically connected to the color temperature switching unit, the wall-cut signal detection unit, and the SCR dimmer status detection unit, respectively. The color temperature switching unit is electrically connected to both the compatible SCR dimming unit and the MCU main control unit, respectively. The SCR dimmer status detection unit is electrically connected to the MCU main control unit. The wall switch signal detection unit is used to detect the number of times the wall switch is turned on, and the MCU main control unit switches to different functions according to the number of times the wall switch is turned on; The compatible silicon controlled rectifier dimming unit is electrically connected to the external dimmer to detect the dimmer's working status. The MCU main control unit adjusts the output color mixing signal according to the different states of the dimmer being turned on, and transmits the color mixing signal to the color temperature switching unit to realize the color temperature change.

2. The thyristor dimming and color-tuning driving circuit according to claim 1, characterized in that, The MCU main control unit includes a chip IC1, the model of which is CM9M131B. The first pin of the chip IC1 is connected to a preset power supply, the fourth pin of the chip IC1 is electrically connected to a wall-cut signal detection unit, the fifth pin of the chip IC1 is electrically connected to a color temperature switching unit, the sixth pin of the chip IC1 is electrically connected to a silicon controlled rectifier dimmer status detection unit, and the eighth pin of the chip IC1 is grounded.

3. The thyristor dimming and color-tuning driving circuit according to claim 1, characterized in that, The wall-cut signal detection unit includes resistors R58, R59, and R60, and capacitor C7. One end of capacitor C7 is electrically connected to the MCU main control unit, one end of resistor R60, and one end of resistor R59. The other end of capacitor C7 is electrically connected to one end of resistor R60, and both the other end of capacitor C7 and one end of resistor R60 are grounded. The other end of resistor R59 is electrically connected to one end of resistor R58.

4. The thyristor dimming and color-tuning driving circuit according to claim 1, characterized in that, The thyristor dimmer status detection unit includes resistors R50, R51, R52, R53, R54, R55, R56, R57, capacitor C6, transistor V2, and transistor V3. The base of transistor V2 is electrically connected to one end of resistor R51 and one end of resistor R52, respectively. The other end of resistor R51 is electrically connected to one end of resistor R50. The collector of transistor V2 is electrically connected to one end of resistor R53 and the base of transistor V3, respectively. The collector of transistor V3 is electrically connected to one end of resistor R55 and one end of resistor R54, respectively. The other end of resistor R53 is electrically connected to the other end of resistor R54, and both the other ends of resistor R53 and resistor R54 are connected to a preset... The power supply is provided, with the other end of resistor R55 electrically connected to one end of resistor R57, one end of resistor R56, and one end of capacitor C6, respectively. The other end of resistor R56 is electrically connected to the MCU main control unit. The other end of resistor R52 is electrically connected to the emitter of transistor V2, the emitter of transistor V3, the other end of resistor R57, and the other end of capacitor C6, respectively. The other ends of resistor R52, the emitters of transistor V2 and V3, the other ends of resistor R57, and the other ends of capacitor C6 are all grounded.

5. The thyristor dimming and color-tuning drive circuit according to claim 1, characterized in that, The color temperature switching unit includes resistor R21, resistor R22, diode D3, capacitor C2, resistor R23, resistor R26, capacitor C3, chip IC5, light-emitting diode W1, light-emitting diode W24, light-emitting diode A1, and light-emitting diode A24. The chip IC5 is model BP5936D. Its first pin is electrically connected to the cathode of diode D3 and one end of capacitor C2. The anode of diode D3 is electrically connected to one end of resistor R22. The other end of resistor R22 is electrically connected to one end of resistor R21. The other end of resistor R21 is electrically connected to the anodes of LED A1 and W1, one end of resistor R23, and a compatible SCR dimming unit. The second pin of chip IC5 is electrically connected to the other end of capacitor C2 and the compatible SCR dimming unit. The third pin of chip IC5 is... The cathode of LED A24 is electrically connected. The fourth pin of chip IC5 is electrically connected to the cathode of LED W24. The cathode of LED W1 is electrically connected to the anode of LED W24. The cathode of LED A1 is electrically connected to the anode of LED A24. The sixth pin of chip IC5 is electrically connected to the MCU main control unit. The seventh pin of chip IC5 is electrically connected to one end of resistor R26 and one end of capacitor C3. The other end of resistor R26 is electrically connected to the other end of resistor R23. The eighth pin of chip IC5 and the other end of capacitor C3 are both grounded.

6. The thyristor dimming and color-tuning driving circuit according to claim 5, characterized in that, The color temperature switching unit also includes a Zener diode ZD2. The cathode of the Zener diode ZD2 is electrically connected to one end of the resistor R26, one end of the capacitor C3, and the seventh pin of the chip IC5. The anode of the Zener diode ZD2 is electrically connected to the other end of the capacitor C3, and the anode of the Zener diode ZD2 is grounded.

7. The thyristor dimming and color-tuning driving circuit according to claim 1, characterized in that, The compatible silicon controlled rectifier dimming unit includes diode D1, resistors R12, R13, and R14, electrolytic capacitor E3, resistors R17, R6, R7, and R10, and chip IC3. The chip IC3 is model BP5178GCL. The first pin of chip IC3 is electrically connected to one end of resistor R12. The other end of resistor R12 is electrically connected to one end of resistor R13 and the anode of diode D1. The second pin of chip IC3 is electrically connected to the cathode of diode D1, one end of electrolytic capacitor E3, and the color temperature switching unit. The third pin of chip IC3 is electrically connected to one end of resistor R6. The fourth pin of chip IC3 is electrically connected to the other end of resistor R6 and one end of resistor R10. The other end of resistor R7 is electrically connected to the other end of resistor R10, and both the other ends of resistor R7 and resistor R10 are grounded. The fifth pin of chip IC3 is electrically connected to one end of resistor R17. The sixth and ninth pins of chip IC3 are both grounded. The seventh pin of chip IC3 is electrically connected to the other end of resistor R17, the other end of electrolytic capacitor E3, and the color temperature switching unit, respectively. The eighth pin of chip IC3 is electrically connected to one end of resistor R14. The other end of resistor R14 is electrically connected to the other end of resistor R13.

8. The thyristor dimming and color-tuning drive circuit according to claim 1, characterized in that, It also includes an MCU power supply unit, which is electrically connected to the MCU main control unit, the wall-cut signal detection unit and the compatible thyristor dimming unit.

9. The thyristor dimming and color-tuning driving circuit according to claim 8, characterized in that, The MCU power supply unit includes chip IC2, inductor L1, electrolytic capacitor E1, resistor R1, electrolytic capacitor E2, inductor L2, resistor R2 and diode D4. The model of the chip IC2 is BP8521C. The first pin of the chip IC2 is electrically connected to one end of the electrolytic capacitor E1, one end of the inductor L1, one end of the resistor R1, and the MCU main control unit. The other end of the electrolytic capacitor E1 is electrically connected to the other end of the resistor R1, and both the other ends of the electrolytic capacitor E1 and the resistor R1 are grounded. The second pin of the chip IC2 is electrically connected to one end of the electrolytic capacitor E2, and both the second pin of the chip IC2 and one end of the electrolytic capacitor E2 are grounded. The fourth pin of the chip IC2 is electrically connected to the other end of the electrolytic capacitor E2, one end of the inductor L2, and one end of the resistor R2. The other end of the inductor L2 is electrically connected to the other end of the resistor R2 and the cathode of the diode D4. The anode of the diode D4 is electrically connected to the compatible silicon controlled rectifier dimming unit. The fifth pin of the chip IC2 is electrically connected to the other end of the inductor L1.

10. The thyristor dimming and color-tuning driving circuit according to claim 1, characterized in that, It also includes an input rectification and filtering unit, which is electrically connected to the compatible silicon controlled rectifier dimming unit and the wall-cut signal detection unit, respectively.

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