A dimming and color adjusting circuit and a PCB

Abstract

The application discloses a dimming and color adjusting circuit and a PCB (Printed Circuit Board), the dimming and color adjusting circuit comprises an input processing unit, a detection unit, an infrared induction unit, an output control unit and a frequency flash removing unit; input ends of the input processing unit and the detection unit are respectively used for receiving external input signals; an output end of the input processing unit is connected with an input end of the frequency flash removing unit, output ends of the detection unit and the infrared induction unit are respectively connected with input ends of the output control unit; and output ends of the output control unit and the frequency flash removing unit are used for connecting lighting devices; the dimming and color adjusting circuit disclosed by the application is used for detecting whether a silicon controlled dimmer is connected externally, and the output control unit and the infrared induction unit adjust working states according to feedback information of the detection unit, so that the dimming and color adjusting circuit can realize silicon controlled dimming and color adjustment and also can realize infrared induction dimming and color adjustment.

Description

Technical Field

[0001] This invention relates to the field of lighting drive circuit technology, and in particular to a dimming and color-tuning circuit and PCB board. Background Technology

[0002] Existing lighting fixture drivers can achieve dimming and color adjustment functions using silicon controlled rectifiers (SCRs), infrared sensor switches in conjunction with control chips, or APP modules. However, the control circuits of existing drivers can generally only achieve dimming and color adjustment functions in one way, resulting in limited control and an inability to meet the needs of various applications. This necessitates users configuring multiple different drivers, increasing transportation and inventory costs and reducing the user experience.

[0003] It is evident that existing technologies still need improvement and enhancement. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a dimming and color-tuning circuit that can realize both silicon controlled rectifier dimming and infrared sensor dimming, and has the advantage of high flexibility in use.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A dimming and color-tuning circuit includes an input processing unit, a detection unit, an infrared sensing unit, an output control unit, and a flicker removal unit. The input terminals of the input processing unit and the detection unit are respectively used to receive external input signals. The output terminal of the input processing unit is connected to the input terminal of the flicker removal unit. The output terminals of the detection unit and the infrared sensing unit are respectively connected to the input terminal of the output control unit. The infrared sensing unit is used to receive infrared signals. The output terminals of the output control unit and the flicker removal unit are used to connect to a lighting device.

[0007] The dimming and color-tuning circuit also includes a current detection unit. The input terminal of the current detection unit is used to connect to the lighting device, and the output terminal of the current detection unit is connected to the input terminal of the output control unit.

[0008] In the dimming and color-tuning circuit, the output control unit includes a third control chip U3, an eleventh diode D11, a twelfth diode D12, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-seventh resistor R27, a fifth field-effect transistor Q5, and a sixth field-effect transistor Q6. The output terminal of the detection unit is connected to pin 9 of the third control chip U3. The infrared sensing unit is connected to pins 3, 4, and 5 of the third control chip U3, respectively. The current sensing unit is connected to pin 13 of the third control chip U3. Pin 12 of the third control chip U3 is connected to one end of the twenty-third resistor R23, one end of the twenty-fourth resistor R24, and the negative terminal of the twelfth diode D12. The other end of the twenty-third resistor R23 is connected to the tenth... The anode of diode D12 is connected to the gate of the sixth field-effect transistor Q6. The other end of the twenty-fourth resistor R24 ​​and the source of the sixth field-effect transistor Q6 are respectively connected to one end of the twenty-seventh resistor R27. Pin 11 of the third control chip U3 is connected to one end of the twenty-first resistor R21, one end of the twenty-second resistor R22, and the cathode of the eleventh diode D11. The other end of the twenty-first resistor R21 and the anode of the eleventh diode D11 are connected to the gate of the fifth field-effect transistor Q5. The other end of the twenty-second resistor R22 and the source of the fifth field-effect transistor Q5 are respectively connected to one end of the twenty-seventh resistor R27. The drain of the fifth field-effect transistor Q5 and the drain of the sixth field-effect transistor Q6 are respectively used to connect to the lighting device. The other end of the twenty-seventh resistor R27 is grounded.

[0009] In the dimming and color-tuning circuit, the detection unit includes an eighteenth resistor R18, a nineteenth resistor R19, a first capacitor C1, a tenth diode D10, a second control chip U2, a thirty-fifth resistor R35, and a thirty-sixth resistor R36. One end of the nineteenth resistor R19, the other end of the first capacitor C1, the positive terminal of the tenth diode D10, and pin 2 of the second control chip U2 are used to receive external input signals. The other end of the nineteenth resistor R19 is connected to one end of the eighteenth resistor R18. The other end of the eighteenth resistor R18 is connected to one end of the first capacitor C1, the negative terminal of the tenth diode D10, and pin 1 of the second control chip U2. Pin 4 of the second control chip U2 is connected to one end of the thirty-sixth resistor R36 and one end of the thirty-fifth resistor R35. The other end of the thirty-fifth resistor R35 is connected to pin 9 of the third control chip U3. The other end of the thirty-sixth resistor R36 and pin 3 of the second control chip U2 are grounded.

[0010] In the dimming and color-tuning circuit, the infrared sensing unit includes a fourth control chip U4, a thirty-first resistor R31, a thirty-second resistor R32, a thirty-third resistor R33, a thirty-fourth resistor R34, an eighth capacitor C8, a ninth capacitor C9, and a tenth capacitor C10. Pin 2 of the fourth control chip U4 is connected to the other end of the thirty-second resistor R32 and pin 5 of the third control chip U3. Pin 7 of the fourth control chip U4 is connected to the other end of the thirty-third resistor R33 and pin 4 of the third control chip U3. Pin 8 of the fourth control chip U4 is connected to the thirty-fourth resistor R31. The other end of the fourth control chip U4 is connected to pin 3 of the third control chip U3; pin 1 of the fourth control chip U4 is connected to one end of the ninth capacitor C9, one end of the tenth capacitor C10, and one end of the thirty-first resistor R31; the other end of the thirty-first resistor R31, one end of the thirty-second resistor R32, one end of the thirty-third resistor R33, and one end of the thirty-fourth resistor R34 are respectively used to connect to an external power supply device; pin 4 of the fourth control chip U4 is connected to one end of the eighth capacitor C8, and the other end of the eighth capacitor C8, the other end of the ninth capacitor C9, and the other end of the tenth capacitor C10 are respectively grounded.

[0011] In the dimming and color-adjusting circuit, the current detection unit includes a seventh control chip U7, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-eighth resistor R28, a twenty-ninth resistor R29, a thirtieth resistor R30, a third capacitor C3, a fifth capacitor C5, and a sixth capacitor C6. One end of the twenty-fifth resistor R25 and one end of the twenty-sixth resistor R26 are used to connect to the lighting device. The other end of the twenty-fifth resistor R25 is connected to pin 1 of the seventh control chip U7 and one end of the third capacitor C3, respectively. Pin 3 of the seventh control chip U7 is connected to pin 29 of the twenty-ninth resistor R20. One end of resistor 9 and one end of resistor R28 are connected; pin 4 of the seventh control chip U7 is connected to the other end of resistor R29 and one end of resistor R30, respectively; the other end of resistor R30, one end of capacitor C5 and one end of capacitor C6 are connected to pin 13 of the third control chip U3, respectively; the other end of capacitor C3, the other end of capacitor C5, the other end of capacitor C6, the other end of resistor R28, the other end of resistor R26 and pin 2 of the seventh control chip U7 are grounded.

[0012] In the dimming and color-tuning circuit, the input processing unit includes a rectifier and a filter. The input terminal of the rectifier is used to receive external input signals, the output terminal of the rectifier is connected to the input terminal of the filter, and the output terminal of the filter is connected to the input terminal of the flicker removal unit.

[0013] In the dimming and color-tuning circuit, the flicker-reducing unit includes a first control chip U1, a sixth control chip U6, a first transformer T1, a fifth diode D5, a sixteenth resistor R16, a third energy storage capacitor CE3, a fifth energy storage capacitor CE5, a sixth diode D6, a twentieth resistor R20, and a ripple suppression section. Pin 1 of the primary winding of the first transformer T1 is connected to the output terminal of the input processing unit and pin 6 of the first control chip U1. Pin 2 of the primary winding of the first transformer T1 is connected to the output terminal of the input processing unit and pin 5 of the first control chip U1. Pin 8 of the first control chip U1 is connected to pin 7 of the second power supply winding of the first transformer T1. Pins 1, 2, 3, and 4 of the first control chip U1 are respectively connected to the input processing unit… The unit's output terminal is connected; pin 3 of the secondary winding of the first transformer T1 is connected to the positive terminal of the fifth diode D5, and the negative terminal of the fifth diode D5 is connected to one end of the sixteenth resistor R16, the positive terminal of the third energy storage capacitor CE3, and the ripple suppression section, respectively; pin 4 of the secondary winding of the first transformer T1 is connected to pin 5 of the first charging winding and the negative terminal of the fifth energy storage capacitor CE5, respectively; pin 6 of the secondary winding of the first transformer T1 is connected to the positive terminal of the sixth diode D6; the positive terminal of the fifth energy storage capacitor CE5 and the negative terminal of the sixth diode D6 are connected to one end of the twentieth resistor R20, and the other end of the twentieth resistor R20 is connected to pin 1 of the sixth control chip U6, and pin 3 of the sixth control chip U6 is used to connect to an external power supply device.

[0014] In the dimming and color-tuning circuit, the ripple suppression section includes a seventeenth resistor R17, a seventh diode D7, an eighth diode D8, a ninth diode D9, a first field-effect transistor Q1, a second field-effect transistor Q2, a third field-effect transistor Q3, a fourth field-effect transistor Q4, a fourth energy storage capacitor CE4, and a first Zener diode ZD1. One end of the seventeenth resistor R17, the anode of the seventh diode D7, the drain of the first field-effect transistor Q1, the drain of the second field-effect transistor Q2, the drain of the third field-effect transistor Q3, and the drain of the fourth field-effect transistor Q4 are respectively connected to the cathode of the fifth diode D5. The cathode of the seventh diode D7 is connected to the eighth diode D9. The positive terminal of diode D8 is connected to the cathode of the eighth diode D8, which is connected to the positive terminal of the ninth diode D9. The other end of the seventeenth resistor R17, the cathode of the ninth diode D9, the gate of the first field-effect transistor Q1, the gate of the second field-effect transistor Q2, the gate of the third field-effect transistor Q3, the gate of the fourth field-effect transistor Q4, and the cathode of the first Zener diode ZD1 are respectively connected to the positive terminal of the fourth energy storage capacitor CE4. The sources of the first field-effect transistor Q1, the second field-effect transistor Q2, the third field-effect transistor Q3, the fourth field-effect transistor Q4, and the positive terminal of the first Zener diode ZD1 are respectively used to connect to the lighting device.

[0015] The present invention also provides a PCB board having the dimming and color-tuning circuits as described above printed on it.

[0016] Beneficial effects:

[0017] This invention provides a dimming and color-adjusting circuit. An external input signal is detected by a detection unit to determine whether a SCR dimmer is connected. If a SCR dimmer is connected, the output control unit and infrared sensing unit stop working, and dimming and color-adjusting are achieved through a flicker-eliminating unit in conjunction with the external SCR dimmer. If no SCR dimmer is connected, an infrared signal is sensed by the infrared sensing unit, and dimming and color-adjusting are then achieved through the output control unit. In other words, the dimming and color-adjusting circuit disclosed in this application can achieve both SCR dimming and color-adjusting and infrared sensing dimming and color-adjusting, offering high flexibility, expanding the applicability of the dimming and color-adjusting circuit, and improving the user experience. Attached Figure Description

[0018] Figure 1 A circuit structure diagram of the dimming and color-tuning circuit provided by the present invention;

[0019] Figure 2 The circuit structure diagram of the input processing unit and the flicker removal unit provided by the present invention;

[0020] Figure 3 The circuit structure diagram of the detection unit, infrared sensing unit and output control unit provided by the present invention;

[0021] Figure 4 The circuit structure diagram of the output control unit and current detection unit provided by the present invention. Detailed Implementation

[0022] This invention provides a dimming and color-tuning circuit and a PCB board. To make the purpose, technical solution and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] In the description of this invention, it should be understood that the terms "installation" and "connection" should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Please see Figures 1 to 4 This invention provides a dimming and color-tuning circuit, including an input processing unit, a detection unit, an infrared sensing unit, an output control unit, and a flicker removal unit; the input terminals of the input processing unit and the detection unit are respectively used to receive external input signals; the output terminal of the input processing unit is connected to the input terminal of the flicker removal unit, the output terminal of the detection unit and the output terminal of the infrared sensing unit are respectively connected to the input terminal of the output control unit, and the infrared sensing unit is used to receive infrared signals; the output terminals of the output control unit and the flicker removal unit are used to connect to a lighting device.

[0025] The dimming and color-adjusting circuit disclosed in this application detects external input signals through a detection unit to determine whether a SCR dimmer is connected. If a SCR dimmer is connected, the output control unit and infrared sensing unit stop working, and dimming and color-adjusting are achieved through a flicker-eliminating unit in conjunction with the external SCR dimmer. Alternatively, the output control unit and infrared sensing unit open their ports, and the infrared sensing unit detects whether a stop-work command is given. If no SCR dimmer is connected, the infrared sensing unit senses an infrared signal, and then the output control unit achieves dimming and color-adjusting. In other words, the dimming and color-adjusting circuit disclosed in this application can achieve both SCR dimming and color-adjusting and infrared sensing dimming and color-adjusting, which has the advantage of high flexibility, increases the applicability of the dimming and color-adjusting circuit, and improves the user experience.

[0026] In one embodiment, the infrared sensing unit realizes the input of commands by detecting user actions. For example, when the infrared sensing unit detects the user's hand passing by once, the infrared sensing unit outputs a signal to the output control unit to stop the drive power supply. When the infrared sensing unit detects the user's hand passing by twice, the infrared sensing unit outputs a signal to the output control unit to switch the color temperature. When the infrared sensing unit detects that the user's hand occludes the device for more than a preset time, the infrared sensing unit outputs a dimming signal to the output control unit.

[0027] Further, please refer to Figure 1 and Figure 4 The dimming and color-tuning circuit also includes a current detection unit. The input terminal of the current detection unit is used to connect to the lighting device, and the output terminal of the current detection unit is connected to the input terminal of the output control unit. The current detection unit feeds back the output current to the output control unit to ensure that the output current of the output control unit is stable and improves the stability of the dimming and color-tuning circuit during operation.

[0028] Further, please refer to Figure 1 , Figure 3 and Figure 4 The output control unit includes a third control chip U3, an eleventh diode D11, a twelfth diode D12, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-seventh resistor R27, a fifth field-effect transistor Q5, and a sixth field-effect transistor Q6. The output terminal of the detection unit is connected to pin 9 of the third control chip U3. The infrared sensing unit is connected to pins 3, 4, and 5 of the third control chip U3, respectively. The current detection unit is connected to pin 13 of the third control chip U3. Pin 12 of the third control chip U3 is connected to one end of the twenty-third resistor R23, one end of the twenty-fourth resistor R24, and the negative terminal of the twelfth diode D12. The other end of the twenty-third resistor R23 and the positive terminal of the twelfth diode D12 are connected to the gate of the sixth field-effect transistor Q6. The connection is as follows: the other end of the 24th resistor R24 ​​and the source of the 6th field-effect transistor Q6 are respectively connected to one end of the 27th resistor R27; pin 11 of the third control chip U3 is connected to one end of the 21st resistor R21, one end of the 22nd resistor R22, and the cathode of the 11th diode D11; the other end of the 21st resistor R21 and the anode of the 11th diode D11 are connected to the gate of the 5th field-effect transistor Q5; the other end of the 22nd resistor R22 and the source of the 5th field-effect transistor Q5 are respectively connected to one end of the 27th resistor R27; the drain of the 5th field-effect transistor Q5 and the drain of the 6th field-effect transistor Q6 are respectively used to connect to the lighting device; the other end of the 27th resistor R27 is grounded; in one embodiment, the model of the third control chip U3 is U-MC51F003A4A0M.

[0029] Further, please refer to Figure 1 and Figure 3The detection unit includes an eighteenth resistor R18, a nineteenth resistor R19, a first capacitor C1, a tenth diode D10, a second control chip U2, a thirty-fifth resistor R35, and a thirty-sixth resistor R36. One end of the nineteenth resistor R19, the other end of the first capacitor C1, the positive terminal of the tenth diode D10, and pin 2 of the second control chip U2 are used to receive external input signals. The other end of the nineteenth resistor R19 is connected to one end of the eighteenth resistor R18, and the other end of the eighteenth resistor R18 is connected to the first capacitor C1. One end of the first control chip U2, the cathode of the tenth diode D10, and pin 1 of the second control chip U2 are connected. Pin 4 of the second control chip U2 is connected to one end of the thirty-sixth resistor R36 and one end of the thirty-fifth resistor R35, respectively. The other end of the thirty-fifth resistor R35 is connected to pin 9 of the third control chip U3. The other end of the thirty-sixth resistor R36 and pin 3 of the second control chip U2 are grounded. In one embodiment, the second control chip U2 is an optocoupler, and the model of the second control chip U2 is PC817.

[0030] Further, please refer to Figure 1 and Figure 3 The infrared sensing unit includes a fourth control chip U4, a thirty-first resistor R31, a thirty-second resistor R32, a thirty-third resistor R33, a thirty-fourth resistor R34, an eighth capacitor C8, a ninth capacitor C9, and a tenth capacitor C10. Pin 2 of the fourth control chip U4 is connected to the other end of the thirty-second resistor R32 and pin 5 of the third control chip U3. Pin 7 of the fourth control chip U4 is connected to the other end of the thirty-third resistor R33 and pin 4 of the third control chip U3. Pin 8 of the fourth control chip U4 is connected to the other end of the thirty-fourth resistor R34 and pin 3 of the third control chip U3. Connections: Pin 1 of the fourth control chip U4 is connected to one end of the ninth capacitor C9, one end of the tenth capacitor C10, and one end of the thirty-first resistor R31, respectively; the other end of the thirty-first resistor R31, one end of the thirty-second resistor R32, one end of the thirty-third resistor R33, and one end of the thirty-fourth resistor R34 are respectively used to connect to an external power supply device; Pin 4 of the fourth control chip U4 is connected to one end of the eighth capacitor C8, and the other end of the eighth capacitor C8, the other end of the ninth capacitor C9, and the other end of the tenth capacitor C10 are respectively grounded; in one embodiment, the fourth control chip U4 is model UCS14266.

[0031] The dimming and color-tuning circuit disclosed in this application, in actual operation, uses the second control chip U2 to detect the input signal through the eighteenth resistor R18, the nineteenth resistor R19 and the tenth diode D10 to determine whether an external thyristor dimmer is connected. The second control chip U2 feeds back to the third control chip U3 through pin 4. The third control chip U3 determines whether to stop working or open the port based on the information fed back by the second control chip U2. The fourth control chip U4 is an infrared connector sensor that can sense external signals through its infrared sensor. The fourth control chip U4 processes the information and feeds it back to the third control chip U3. The third control chip U3, based on the information fed back by the fourth control chip U4, further outputs the corresponding duty cycle pulse signal through its internally set program. The duty cycle pulse signal is output through pins 11 and 12 to adjust the working state of the fifth field-effect transistor Q5 and the sixth field-effect transistor Q6, thereby achieving the purpose of dimming and color temperature adjustment.

[0032] Further, please refer to Figure 1 and Figure 4 The current detection unit includes a seventh control chip U7, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-eighth resistor R28, a twenty-ninth resistor R29, a thirtieth resistor R30, a third capacitor C3, a fifth capacitor C5, and a sixth capacitor C6. One end of the twenty-fifth resistor R25 and one end of the twenty-sixth resistor R26 are used to connect to the lighting device. The other end of the twenty-fifth resistor R25 is connected to pin 1 of the seventh control chip U7 and one end of the third capacitor C3, respectively. Pin 3 of the seventh control chip U7 is connected to one end of the twenty-ninth resistor R29 and one end of the twenty-eighth resistor R28, respectively. Pin 4 of the seventh control chip U7 is connected to the other end of the twenty-ninth resistor R29 and one end of the thirtieth resistor R30, respectively. The other end of the thirtieth resistor R30, one end of the fifth capacitor C5, and one end of the sixth capacitor C6 are connected to pin 13 of the third control chip U3, respectively. The other ends of the third capacitor C3, the fifth capacitor C5, the sixth capacitor C6, the twenty-eighth resistor R28, the twenty-sixth resistor R26, and pin 2 of the seventh control chip U7 are grounded. In one embodiment, the model of the seventh control chip U7 is LM321M5X / TR.

[0033] Further, please refer to Figure 1 and Figure 2 The input processing unit includes a rectifier and a filter. The input terminal of the rectifier is used to receive external input signals, the output terminal of the rectifier is connected to the input terminal of the filter, and the output terminal of the filter is connected to the input terminal of the flicker removal unit.

[0034] In one embodiment, see Figure 1 and Figure 2 The rectifier section includes a first rectifier bridge BD1, and the filter section includes a first inductor L1, a first diode D2, a first energy storage capacitor CE1, a third resistor R3, and a fourth resistor R4. Pins 2 and 4 of the first rectifier bridge BD1 are used to receive external input signals. Pin 3 of the first rectifier bridge BD1 is connected to one end of the first inductor L1, and the other end of the first inductor L1 is connected to the positive terminal of the first diode D2 and pin 1 of the primary winding of the first transformer T1. The negative terminal of the first diode D2 is connected to the positive terminal of the first energy storage capacitor CE1 and one end of the third resistor R3, and the other end of the third resistor R3 is connected to one end of the fourth resistor R4. Pin 1 of the first rectifier bridge BD1, the negative terminal of the first energy storage capacitor CE1, and the other end of the fourth resistor R4 are connected to pins 1, 2, 3, and 4 of the first control chip U1, respectively.

[0035] Further, please refer to Figure 1 and Figure 2The flicker reduction unit is used to suppress the flicker problem of the lighting device and improve the user experience. The flicker reduction unit includes a first control chip U1, a sixth control chip U6, a first transformer T1, a fifth diode D5, a sixteenth resistor R16, a third energy storage capacitor CE3, a fifth energy storage capacitor CE5, a sixth diode D6, a twentieth resistor R20, and a ripple suppression section. Pin 1 of the primary winding of the first transformer T1 is connected to the output terminal of the input processing unit and pin 6 of the first control chip U1. Pin 2 of the primary winding of the first transformer T1 is connected to the output terminal of the input processing unit and pin 5 of the first control chip U1. Pin 8 of the first control chip U1 is connected to pin 7 of the second power supply winding of the first transformer T1. Pins 1, 2, 3, and 4 of the first control chip U1 are connected to the output terminal of the input processing unit. Pin 3 of the secondary winding of transformer T1 is connected to the anode of the fifth diode D5. The cathode of the fifth diode D5 is connected to one end of the sixteenth resistor R16, the anode of the third energy storage capacitor CE3, and the ripple suppression section, respectively. Pin 4 of the secondary winding of the first transformer T1 is connected to pin 5 of the first charging winding and the cathode of the fifth energy storage capacitor CE5, respectively. Pin 6 of the secondary winding of the first transformer T1 is connected to the anode of the sixth diode D6. The anode of the fifth energy storage capacitor CE5 and the cathode of the sixth diode D6 are connected to one end of the twentieth resistor R20, and the other end of the twentieth resistor R20 is connected to pin 1 of the sixth control chip U6. Pin 3 of the sixth control chip U6 is used to connect to an external power supply device. In one embodiment, the first control chip U1 is model BP3286H, and the sixth control chip U6 is model CE6275A.

[0036] Further, please refer to Figure 1 and Figure 2The ripple suppression section includes a seventeenth resistor R17, a seventh diode D7, an eighth diode D8, a ninth diode D9, a first field-effect transistor Q1, a second field-effect transistor Q2, a third field-effect transistor Q3, a fourth field-effect transistor Q4, a fourth energy storage capacitor CE4, and a first Zener diode ZD1. One end of the seventeenth resistor R17, the anode of the seventh diode D7, the drain of the first field-effect transistor Q1, the drain of the second field-effect transistor Q2, the drain of the third field-effect transistor Q3, and the drain of the fourth field-effect transistor Q4 are respectively connected to the cathode of the fifth diode D5. The cathode of the seventh diode D7 is connected to the anode of the eighth diode D8. The cathode of the eighth diode D8 is connected to the anode of the ninth diode D9. The other end of the seventeenth resistor R17, the cathode of the ninth diode D9, the gate of the first field-effect transistor Q1, the gate of the second field-effect transistor Q2, the gate of the third field-effect transistor Q3, the gate of the fourth field-effect transistor Q4, and the cathode of the first Zener diode ZD1 are respectively connected to the anode of the fourth energy storage capacitor CE4. The sources of the first field-effect transistor Q1, the second field-effect transistor Q2, the third field-effect transistor Q3, the fourth field-effect transistor Q4, and the anode of the first Zener diode ZD1 are respectively used to connect to the lighting device.

[0037] The present invention also provides a PCB board having the dimming and color-tuning circuits as described above printed on it.

[0038] It is understood that those skilled in the art can make equivalent substitutions or changes to the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A dimming and color-tuning circuit, characterized in that, The system includes an input processing unit, a detection unit, an infrared sensing unit, an output control unit, and a flicker removal unit. The input terminals of the input processing unit and the detection unit are used to receive external input signals. The output terminal of the input processing unit is connected to the input terminal of the flicker removal unit. The output terminals of the detection unit and the infrared sensing unit are connected to the input terminal of the output control unit. The infrared sensing unit is used to receive infrared signals. The output terminals of the output control unit and the flicker removal unit are used to connect to a lighting device. The output control unit includes a third control chip U3, and the detection unit includes a second control chip U2 and a thirty-fifth resistor R35. The third control chip U3 is model U-MC51F003A4A0M, and the second control chip U2 is model PC817. Pin 2 of the second control chip U2 is used to receive external input signals, pin 4 of the second control chip U2 is connected to one end of the thirty-fifth resistor R35, and the other end of the thirty-fifth resistor R35 is connected to pin 9 of the third control chip U3. The infrared sensing unit includes a fourth control chip U4, which is model UCS14266; pin 7 of the fourth control chip U4 is connected to pin 4 of the third control chip U3, and pin 8 of the fourth control chip U4 is connected to pin 3 of the third control chip U3. The second control chip U2 detects the input signal to determine whether a thyristor dimmer is connected externally. The second control chip U2 feeds back to the third control chip U3 through pin 4. The third control chip U3 determines whether to stop working or open the port based on the information fed back by the second control chip U2. The fourth control chip U4 is an infrared connector sensor that can sense external signals through its infrared sensor. The fourth control chip U4 processes the information and feeds it back to the third control chip U3. The third control chip U3 adjusts the working state of the output control unit based on the information fed back by the fourth control chip U4 to achieve the purpose of dimming and color temperature adjustment.

2. The dimming and color-tuning circuit according to claim 1, characterized in that, It also includes a current detection unit, the input of which is used to connect to the lighting device, and the output of which is connected to the input of the output control unit.

3. The dimming and color-tuning circuit according to claim 2, characterized in that, The output control unit further includes an eleventh diode D11, a twelfth diode D12, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-seventh resistor R27, a fifth field-effect transistor Q5, and a sixth field-effect transistor Q6. The output terminal of the detection unit is connected to pin 9 of the third control chip U3. The infrared sensing unit is connected to pins 3, 4, and 5 of the third control chip U3, respectively. The current detection unit is connected to pin 13 of the third control chip U3. Pin 12 of the third control chip U3 is connected to one end of the twenty-third resistor R23, one end of the twenty-fourth resistor R24, and the negative terminal of the twelfth diode D12. The other end of the twenty-third resistor R23 is connected to the positive terminal of the twelfth diode D12. The second terminal of the 24th resistor R24 ​​and the source of the sixth field-effect transistor Q6 are connected to one end of the 27th resistor R27, respectively. Pin 11 of the third control chip U3 is connected to one end of the 21st resistor R21, one end of the 22nd resistor R22, and the cathode of the 11th diode D11. The other end of the 21st resistor R21 and the anode of the 11th diode D11 are connected to the gate of the fifth field-effect transistor Q5. The other end of the 22nd resistor R22 and the source of the fifth field-effect transistor Q5 are connected to one end of the 27th resistor R27, respectively. The drain of the fifth field-effect transistor Q5 and the drain of the sixth field-effect transistor Q6 are used to connect to the lighting device, and the other end of the 27th resistor R27 is grounded.

4. The dimming and color-tuning circuit according to claim 3, characterized in that, The detection unit further includes an eighteenth resistor R18, a nineteenth resistor R19, a first capacitor C1, a tenth diode D10, and a thirty-sixth resistor R36. One end of the nineteenth resistor R19, the other end of the first capacitor C1, and the positive terminal of the tenth diode D10 are used to receive external input signals. The other end of the nineteenth resistor R19 is connected to one end of the eighteenth resistor R18. The other end of the eighteenth resistor R18 is connected to one end of the first capacitor C1, the negative terminal of the tenth diode D10, and pin 1 of the second control chip U2. Pin 4 of the second control chip U2 is also connected to one end of the thirty-sixth resistor R36. The other end of the thirty-sixth resistor R36 and pin 3 of the second control chip U2 are grounded.

5. A dimming and color-tuning circuit according to claim 3, characterized in that, The infrared sensing unit further includes a 31st resistor R31, a 32nd resistor R32, a 33rd resistor R33, a 34th resistor R34, an 8th capacitor C8, a 9th capacitor C9, and a 10th capacitor C10; pin 2 of the fourth control chip U4 is connected to the other end of the 32nd resistor R32 and pin 5 of the third control chip U3, pin 7 of the fourth control chip U4 is also connected to the other end of the 33rd resistor R33, and pin 8 of the fourth control chip U4 is also connected to the other end of the 34th resistor R34; pin 1 of the fourth control chip U4 is connected to one end of the 9th capacitor C9, one end of the 10th capacitor C10, and one end of the 31st resistor R31; the other end of the 31st resistor R31, one end of the 32nd resistor R32, one end of the 33rd resistor R33, and one end of the 34th resistor R34 are respectively used to connect to an external power supply device; Pin 4 of the fourth control chip U4 is connected to one end of the eighth capacitor C8, and the other end of the eighth capacitor C8, the other end of the ninth capacitor C9, and the other end of the tenth capacitor C10 are respectively grounded.

6. A dimming and color-tuning circuit according to claim 3, characterized in that, The current detection unit includes a seventh control chip U7, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-eighth resistor R28, a twenty-ninth resistor R29, a thirtieth resistor R30, a third capacitor C3, a fifth capacitor C5, and a sixth capacitor C6. One end of the twenty-fifth resistor R25 and one end of the twenty-sixth resistor R26 are used to connect to the lighting device. The other end of the twenty-fifth resistor R25 is connected to pin 1 of the seventh control chip U7 and one end of the third capacitor C3, respectively. Pin 3 of the seventh control chip U7 is connected to one end of the twenty-ninth resistor R29. One end of the 28th resistor R28 is connected; pin 4 of the seventh control chip U7 is connected to the other end of the 29th resistor R29 and one end of the 30th resistor R30, the other end of the 30th resistor R30, one end of the fifth capacitor C5 and one end of the sixth capacitor C6 are connected to pin 13 of the third control chip U3; the other end of the third capacitor C3, the other end of the fifth capacitor C5, the other end of the sixth capacitor C6, the other end of the 28th resistor R28, the other end of the 26th resistor R26 and pin 2 of the seventh control chip U7 are grounded.

7. A dimming and color-tuning circuit according to claim 1, characterized in that, The input processing unit includes a rectifier and a filter. The input terminal of the rectifier is used to receive external input signals, the output terminal of the rectifier is connected to the input terminal of the filter, and the output terminal of the filter is connected to the input terminal of the flicker removal unit.

8. A dimming and color-tuning circuit according to claim 1, characterized in that, The flicker reduction unit includes a first control chip U1, a sixth control chip U6, a first transformer T1, a fifth diode D5, a sixteenth resistor R16, a third energy storage capacitor CE3, a fifth energy storage capacitor CE5, a sixth diode D6, a twentieth resistor R20, and a ripple suppression section. Pin 1 of the primary winding of the first transformer T1 is connected to the output terminal of the input processing unit and pin 6 of the first control chip U1. Pin 2 of the primary winding of the first transformer T1 is connected to the output terminal of the input processing unit and pin 5 of the first control chip U1. Pin 8 of the first control chip U1 is connected to pin 7 of the second power supply winding of the first transformer T1. Pins 1, 2, 3, and 4 of the first control chip U1 are connected to the output terminal of the input processing unit. Connections: Pin 3 of the secondary winding of the first transformer T1 is connected to the positive terminal of the fifth diode D5, and the negative terminal of the fifth diode D5 is connected to one end of the sixteenth resistor R16, the positive terminal of the third energy storage capacitor CE3, and the ripple suppression section, respectively; Pin 4 of the secondary winding of the first transformer T1 is connected to pin 5 of the first charging winding and the negative terminal of the fifth energy storage capacitor CE5, respectively; Pin 6 of the secondary winding of the first transformer T1 is connected to the positive terminal of the sixth diode D6; The positive terminal of the fifth energy storage capacitor CE5 and the negative terminal of the sixth diode D6 are connected to one end of the twentieth resistor R20, and the other end of the twentieth resistor R20 is connected to pin 1 of the sixth control chip U6, and pin 3 of the sixth control chip U6 is used to connect to an external power supply device.

9. A dimming and color-tuning circuit according to claim 8, characterized in that, The ripple suppression section includes a seventeenth resistor R17, a seventh diode D7, an eighth diode D8, a ninth diode D9, a first field-effect transistor Q1, a second field-effect transistor Q2, a third field-effect transistor Q3, a fourth field-effect transistor Q4, a fourth energy storage capacitor CE4, and a first Zener diode ZD1. One end of the seventeenth resistor R17, the anode of the seventh diode D7, the drain of the first field-effect transistor Q1, the drain of the second field-effect transistor Q2, the drain of the third field-effect transistor Q3, and the drain of the fourth field-effect transistor Q4 are respectively connected to the cathode of the fifth diode D5. The cathode of the seventh diode D7 is connected to the anode of the eighth diode D8. The cathode of the eighth diode D8 is connected to the anode of the ninth diode D9. The other end of the seventeenth resistor R17, the cathode of the ninth diode D9, the gate of the first field-effect transistor Q1, the gate of the second field-effect transistor Q2, the gate of the third field-effect transistor Q3, the gate of the fourth field-effect transistor Q4, and the cathode of the first Zener diode ZD1 are respectively connected to the anode of the fourth energy storage capacitor CE4. The sources of the first field-effect transistor Q1, the second field-effect transistor Q2, the third field-effect transistor Q3, the fourth field-effect transistor Q4, and the anode of the first Zener diode ZD1 are respectively used to connect to the lighting device.

10. A PCB board, characterized in that, The PCB board is printed with a dimming and color-adjusting circuit as described in any one of claims 1-9.

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