Dimming control circuit, dimmer and lighting device

Abstract

The embodiment of the utility model provides a dimming control circuit, a dimmer and a lighting device, and relates to the technical field of circuit design. The dimming control circuit comprises a first dimming circuit and a second dimming circuit, wherein the first dimming circuit receives a first dimming control signal and outputs a first signal; the first dimming control signal comprises a dimming signal of which the voltage is in a preset range; the second dimming circuit receives a second dimming control signal and outputs a second signal; the second dimming control signal comprises a DALI dimming signal; the second dimming circuit receives a third dimming control signal and outputs a third signal; the third dimming control signal comprises a PUSH dimming signal; the dimming circuit inputs any one of the first signal, the second signal, and the third signal to the light emitting device. According to the dimming control circuit, the technical effect that the dimming control circuit supports DALI dimming, PUSH dimming and 0-10V dimming at the same time is achieved.

Description

Technical Field

[0001] This application relates to the technical field of circuit design, and more specifically, to a dimming control circuit, a dimmer, and a lighting device. Background Technology

[0002] As people's living standards improve, their requirements for quality of life are getting higher and higher. When using lighting fixtures, it is often necessary to adjust parameters such as color temperature, luminous flux, illuminance level, and brightness. Lighting fixtures are usually equipped with dimming circuits to achieve dimming.

[0003] Common lighting adjustment methods include DALI dimming, PUSH dimming, and 0-10V dimming. However, existing dimming circuits cannot simultaneously support all three dimming methods, resulting in limited and inflexible lighting adjustment options and a poor user experience. Utility Model Content

[0004] This application addresses the shortcomings of existing methods by proposing a dimming control circuit, a dimmer, and a lighting device to solve the technical problem in the related art where the dimming circuit is incompatible with three different dimming methods: DALI dimming, PUSH dimming, and 0-10V dimming.

[0005] In a first aspect, embodiments of this application provide a dimming control circuit, including:

[0006] Includes: a first dimming circuit and a second dimming circuit;

[0007] The first dimming circuit receives a first dimming control signal and outputs a first signal; the first dimming control signal includes a dimming signal with a voltage within a preset range.

[0008] The second dimming circuit receives a second dimming control signal and outputs a second signal; the second dimming control signal includes a DALI dimming signal.

[0009] The second dimming circuit receives a third dimming control signal and outputs a third signal; the third dimming control signal includes a PUSH dimming signal.

[0010] The dimming circuit inputs any one of the first signal, the second signal, and the third signal to the light-emitting device.

[0011] In one possible implementation, the dimming control circuit further includes: a voltage input module and a voltage conversion module connected in sequence;

[0012] The voltage input module includes a first connector and a second connector; the first connector and the second connector are connected to an external power supply and receive the DC voltage input from the external power supply.

[0013] The voltage conversion module includes: a first voltage conversion module and a second voltage conversion module;

[0014] The first voltage conversion module converts the DC voltage input by the voltage input module into a first voltage; the second voltage conversion module converts the DC voltage input by the voltage input module into a second voltage.

[0015] In one possible implementation, the first dimming circuit includes: a third voltage conversion module, a signal receiving module, and a first feedback module electrically connected in pairs; the first feedback module includes: the input terminal of a first optocoupler; the signal receiving module includes: a third connector;

[0016] The third voltage conversion module is electrically connected to the voltage input module, converts the DC voltage input by the voltage input module into a third voltage, and outputs the third voltage to the signal receiving module and the first feedback module.

[0017] The third connector receives the input first dimming control signal and outputs the first dimming control signal to the first feedback module. The first feedback module drives the input end of the first optocoupler to send an optical signal according to the first dimming control signal.

[0018] In one possible implementation, the third voltage conversion module further includes: a control module, a transformer module, and a second feedback module connected in sequence;

[0019] The control module receives the DC voltage input from the voltage input module, converts the DC voltage into a third voltage via the transformer module, and outputs the third voltage to the signal receiving module and the first feedback module via the second feedback module.

[0020] In one possible implementation, the dimming control circuit further includes: a voltage regulator output module, which is electrically connected to the second voltage conversion module;

[0021] The voltage regulation output module includes the output terminal of a first optocoupler, chip U11, and chip U13; the output terminal of the first optocoupler includes a collector, an emitter, and a base; chip U13 includes a V_IN pin, a V_OUT pin, and a GND pin; chip U11 includes a VDD pin and a pc2 pin.

[0022] The V_IN pin is electrically connected to the second voltage conversion module and receives the second voltage output by the second voltage conversion module; the V_OUT pin is electrically connected to the collector and the VDD pin; the emitter and the GND pin are grounded; the base receives the optical signal sent by the input terminal of the first optocoupler; and the pc2 pin outputs the fourth voltage.

[0023] In one possible implementation, the dimming control circuit further includes: a PWM pulse width modulation module; the PWM pulse width modulation module is electrically connected to the first voltage conversion module, the regulated output module, the second dimming circuit, and the light-emitting device;

[0024] The PWM pulse width modulation module includes a first operational amplifier, which includes a non-inverting input terminal, an inverting input terminal, a positive power supply terminal, a negative power supply terminal, and an output terminal.

[0025] The non-inverting input terminal is electrically connected to the pc2 pin and receives the fourth voltage output by the pc2 pin; the inverting input terminal is electrically connected to the light-emitting device; the positive power supply terminal is grounded; the negative power supply terminal is electrically connected to the first voltage conversion module and receives the first voltage output by the first voltage conversion module; the output terminal is electrically connected to the second dimming circuit and outputs a PWM signal to the second dimming circuit.

[0026] In one possible implementation, the second dimming circuit further includes: a fourth connector and a chip U1; the chip U1 includes: a DA1 pin, a DA2 pin, a PWM pin, and an R pin; the fourth connector is electrically connected to the chip U1;

[0027] The R pin is electrically connected to the output terminal of the first operational amplifier, receives the PWM signal output by the first operational amplifier, and the PWM pin outputs the first signal;

[0028] The fourth connector receives the input second dimming control signal, outputs the second dimming control signal to the DA2 pin, and the PWM pin outputs the second signal;

[0029] The fourth connector receives the input third dimming control signal and outputs the third dimming control signal to the DA1 pin, while the PWM pin outputs the third signal.

[0030] In one possible implementation, the second dimming circuit further includes: a second operational amplifier, a first field-effect transistor, a first Zener diode, and a first resistor; the chip U1 also includes an ERC pin;

[0031] The cathode of the first Zener diode is electrically connected to the voltage input module and the light-emitting device, the anode of the first Zener diode is electrically connected to the drain of the first field-effect transistor, the gate of the first field-effect transistor is electrically connected to the PWM pin, and the source of the first field-effect transistor is electrically connected to the positive input terminal of the second operational amplifier.

[0032] The inverting input terminal of the second operational amplifier is electrically connected to the first terminal of the first resistor, the second terminal of the first resistor is grounded to the positive power supply terminal of the second operational amplifier, the negative power supply terminal of the second operational amplifier is electrically connected to the first voltage conversion module, the output terminal of the second operational amplifier is electrically connected to the R pin, and the ERC pin is electrically connected to the output terminal of the second operational amplifier.

[0033] Secondly, embodiments of this application provide a dimmer, which is used to input a dimming control signal to the dimming control circuit described in any one of the first aspects, the dimming control signal including at least one of a first dimming control signal, a second dimming control signal and a third dimming control signal.

[0034] Thirdly, embodiments of this application provide a lighting device, including a light-emitting device and a dimming control circuit as described in any one of the first aspects, connected in sequence, wherein the dimming control circuit drives the light-emitting device according to any one of the first signal, the second signal, and the third signal.

[0035] The beneficial technical effects of the technical solutions provided in this application include:

[0036] This application provides a dimming control circuit, a dimmer, and a lighting device. A first dimming circuit receives dimming signals with a voltage range of 0-10V and outputs a first signal. A second dimming circuit receives DALI dimming control signals and PUSH dimming control signals and outputs a second signal and a third signal respectively. A light-emitting device is driven according to at least one of the first, second, and third signals. This dimming control circuit in this application compatibility model integrates 0-10V dimming, DALI dimming, and PUSH dimming into a single dimming control circuit, solving the technical problem in the prior art that dimming circuits cannot simultaneously support 0-10V dimming, DALI dimming, and PUSH dimming. This improves the flexibility of lamp adjustment, provides diverse control methods, and effectively enhances the user experience.

[0037] Additional aspects and advantages of the embodiments of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of the embodiments of this application. Attached Figure Description

[0038] The above and / or additional aspects and advantages of the embodiments of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0039] Figure 1 A schematic diagram of the framework of a dimming control circuit provided in an embodiment of this application;

[0040] Figure 2 A circuit diagram of a dimming control circuit provided in an embodiment of this application;

[0041] Figure 3 A circuit diagram of a voltage input module provided in an embodiment of this application;

[0042] Figure 4 A circuit diagram of a voltage conversion module provided in an embodiment of this application;

[0043] Figure 5A A circuit diagram of a third voltage conversion module provided in an embodiment of this application;

[0044] Figure 5B A circuit diagram of a signal receiving module and a first feedback module provided for embodiments of this application;

[0045] Figure 6 A circuit diagram of a voltage regulator output module provided in an embodiment of this application;

[0046] Figure 7 A circuit diagram of a PWM pulse width modulation module provided in an embodiment of this application;

[0047] Figure 8 A circuit diagram of a second dimming circuit provided in an embodiment of this application;

[0048] Figure 9 This is a schematic diagram of the structure of a lighting device provided in an embodiment of this application;

[0049] Figure label:

[0050] 10: First dimming circuit; 20: Second dimming circuit; 30: Voltage input module; 40: Voltage conversion module; 50: Regulated output module; 60: PWM pulse width modulation module;

[0051] T1: Transformer; U12A: Output terminal of the first optocoupler; U12B: Input terminal of the first optocoupler;

[0052] U14: First operational amplifier; U3: Second operational amplifier;

[0053] Q1: First field-effect transistor; D1: First Zener diode;

[0054] CON3: First connector; CON4: Second connector; CON1: Third connector; CON2: Fourth connector;

[0055] R5: First resistor; R51: First terminal of the first resistor; R52: Second terminal of the first resistor. Detailed Implementation

[0056] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions for explaining the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0057] Those skilled in the art will understand that, unless specifically stated otherwise, the terms “comprising” and “the” used herein may also include plural forms. It should be further understood that the term “comprising” as used in the specification of this application means the presence of features, integers, steps, operations, elements, and / or components, but does not exclude other features, information, data, steps, operations, elements, components, and / or combinations thereof supported by the art. It should be understood that when we say an element is “connected” or “coupled” to another element, the element may be directly connected or coupled to the other element, or it may mean that the element and the other element are connected through an intermediate element. Furthermore, “connected” or “coupled” as used herein may include wireless connection or wireless coupling. The term “and / or” as used herein means at least one of the items defined by the term; for example, “A and / or B” may be implemented as “A”, or as “B”, or as “A and B”.

[0058] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0059] Research has found that common lighting adjustment methods in related technologies include DALI dimming, PUSH dimming, and 0-10V dimming. However, existing dimming circuits cannot simultaneously support all three dimming methods, resulting in limited and inflexible lighting adjustment options and a poor user experience.

[0060] The dimming control circuit, dimmer, and lighting device provided in this application are intended to solve the above-mentioned technical problems in related technologies.

[0061] The technical solutions of the embodiments of this application and how the technical solutions of the embodiments of this application solve the above-mentioned technical problems are described in detail below with specific examples. It should be noted that the following embodiments can be referred to, borrowed from or combined with each other, and the same terms, similar features and similar implementation steps in different embodiments will not be described again.

[0062] like Figure 1 and Figure 2 As shown, the dimming control circuit includes: a first dimming circuit 10 and a second dimming circuit 20; wherein, the first dimming circuit 10 receives a first dimming control signal and outputs a first signal; the first dimming control signal includes a dimming signal with a voltage within a preset range; the second dimming circuit 20 receives a second dimming control signal and outputs a second signal; the second dimming control signal includes a DALI dimming signal; the second dimming circuit 20 receives a third dimming control signal and outputs a third signal; the third dimming control signal includes a PUSH dimming signal; the dimming circuit inputs any one of the first signal, the second signal, and the third signal to the light-emitting device.

[0063] Its working principle is as follows: In this embodiment, the first dimming circuit 10 is a 0-10V dimming circuit, which receives a dimming control signal with a voltage range of 0-10V sent by a 0-10V dimmer and outputs a first signal; the second dimming circuit 20 is a DALI dimming and PUSH dimming circuit, which generates a second signal by receiving a DALI dimming control signal sent by a DALI dimmer, or generates a third signal by receiving a PUSH dimming control signal sent by a PUSH dimmer; any one of the first signal, the second signal and the third signal is input to the light-emitting device, thereby adjusting the color temperature, luminous flux, illuminance level, brightness and other parameters of the light-emitting device.

[0064] like Figure 1 and Figure 2 As shown, in some optional embodiments, the dimming control circuit further includes: a voltage input module 30, a voltage conversion module 40, a voltage regulation output module 50, and a PWM pulse width modulation module 60; wherein, the input terminal of the voltage input module 30 is connected to an external power supply for receiving DC voltage output from the external power supply; the output terminal of the voltage input module 30 is connected to the input terminal of the voltage conversion module 40 for providing DC voltage to the voltage conversion module 40; the output terminal of the voltage conversion module 40 is connected to the input terminal of the first dimming circuit 10, the input terminal of the voltage regulation output module 50, and the PWM pulse width modulation module 60, respectively. The input terminal of the PWM pulse width modulation module 60 and the input terminal of the second dimming circuit 20 are connected to provide voltage to these modules or circuits; the output terminal of the first dimming circuit 10 is connected to the input terminal 50 of the voltage regulator module to adjust the output voltage of the voltage regulator module; the output terminal of the voltage regulator module 50 is connected to the input terminal of the PWM pulse width modulation module 60 to provide 5V voltage to the PWM pulse width modulation module 60; the output terminal of the PWM pulse width modulation module 60 is connected to the input terminal of the second dimming circuit 20 to provide a PWM signal to the second dimming circuit 20.

[0065] like Figure 3-8As shown, in some optional embodiments, the dimming control circuit further includes: a voltage input module 30 and a voltage conversion module 40 electrically connected in sequence; wherein, the voltage input module 40 includes a first connector and a second connector; the first connector and the second connector are electrically connected to an external power supply for receiving DC voltage input from the external power supply; the voltage conversion module 40 includes: a first voltage conversion module 401 and a second voltage conversion module 402; the first voltage conversion module 401 converts the DC voltage input from the voltage input module 30 into a first voltage; the second voltage conversion module 402 converts the DC voltage input from the voltage input module 30 into a second voltage.

[0066] Specifically, in this embodiment, the first connector is CON3 and the second connector is CON4; wherein, CON3 and CON4 are electrically connected to an external power supply and are used to receive the DC voltage V+ input from the external power supply. It should be noted that the DC voltage input from the external power supply in this embodiment is 24V; that is, the V+ voltage in this embodiment is 24V; furthermore, in this embodiment, CON3 and CON4 are plug-in connectors, and either one can be connected to an external power supply to power the dimming control circuit provided in this application.

[0067] Specifically, in this embodiment, the voltage conversion module 40 includes: a first voltage conversion module 401 and a second voltage conversion module 402; the first voltage conversion module 401 is used to convert the 24V voltage input from the external power supply to a 9V voltage, and the second voltage conversion module 402 is used to convert the 24V voltage to 12V VCC; as Figure 4 As shown, the first voltage conversion module 401 includes chip U2, and chip U2's... The pin is used to receive the V+ DC voltage from an external power supply input. The pin is used to output 9V DC voltage, and the GND pin is grounded; the second voltage conversion module 402 includes chip U8, and chip U8's The pin is used to receive the V+ DC voltage from an external power supply input. The pin is used to output a 12V VCC DC voltage, and the GND pin is grounded.

[0068] In some optional embodiments, the first dimming circuit 10 includes: a third voltage conversion module 101, a signal receiving module 102, and a first feedback module 103 electrically connected in pairs; the first feedback module 103 includes: an input terminal of a first optocoupler U12B; the signal receiving module 102 includes: a third connector; wherein, the third voltage conversion module 101 is electrically connected to the voltage input module 30, converts the DC voltage input by the voltage input module 30 into a third voltage, and outputs the third voltage to the signal receiving module 102 and the first feedback module 103; the third connector receives the input first dimming control signal and outputs the first dimming control signal to the first feedback module 103, and the first feedback module 103 drives the input terminal U12B of the first optocoupler to send an optical signal according to the first dimming control signal.

[0069] Specifically, in this embodiment of the application, the third voltage conversion module 101 and the chip U8 The pins are electrically connected to receive the V+ DC voltage from the external power supply and convert it into a 12V voltage output to the signal receiving module 102 and the first feedback module 103. The signal receiving module 102 includes a resistor R24, which is a bleed resistor used to reduce the 12V voltage input to the third voltage conversion module 101. The third connector is CON1, which includes four pins. The cathode of the Zener diode D11 is connected to pins 3 and 4 of CON1. Electrical connections: The positive terminal of Zener diode D11 is electrically connected to pins 1 and 2 of CON1; CON1 is electrically connected to the 0-10V dimmer to receive the 0-10V dimmer input voltage; pins 1 and 2 of CON1 are used to receive the negative voltage of 1-10V, and pins 3 and 4 are used to receive the positive voltage of 1-10V; CON1 is electrically connected to pin pc1 of chip U10 to output the 0-10V dimmer input voltage to chip U10.

[0070] Furthermore, the U6 chip The pin is electrically connected to the third voltage conversion module 101 and is used to receive the 12V voltage output by the third voltage conversion module 101; The pin is electrically connected to the VDD pin of chip U10 to supply power to chip U10; the GND pin is grounded. In addition, the pc2 pin of chip U10 is connected to the input terminal of the first optocoupler U12B; in this embodiment, the input terminal of the first optocoupler U12B is a light-emitting diode, therefore, the pc2 pin of chip U10 is connected to the positive terminal of the light-emitting diode, and the negative terminal of the light-emitting diode is grounded.

[0071] In practical applications, an optical coupler (OC), also known as an opto-isolator or simply optocoupler, is a device that uses light as a medium to transmit electrical signals. Typically, the input terminal (infrared light-emitting diode, LED) and the output terminal (photosensitive semiconductor tube) are packaged in the same housing. When an electrical signal is applied to the emitting unit of the optocoupler, the LED emits light, and the output terminal receives the light and generates a photocurrent, which flows out from the output terminal, thus realizing an "electrical-optical-electrical" conversion. In this embodiment, the pc1 pin of chip U10 is electrically connected to CON1 to receive the voltage input from the 0-10V dimmer. Based on the voltage received at the pc1 pin, chip U10 adjusts the output voltage at the pc2 pin, controlling the input terminal U12B of the first optocoupler to generate an optical signal, and sends the optical signal to the output terminal U12A of the first optocoupler, thereby controlling the conduction state of the output terminal U12A of the first optocoupler.

[0072] In some optional embodiments, the third voltage conversion module 101 further includes: a control module 1011, a transformer module 1012, and a second feedback module 1013 connected in sequence; the control module 1011 receives the DC voltage input from the voltage input module 30, converts the DC voltage into a third voltage via the transformer module 1012, and outputs the third voltage to the signal receiving module 102 and the first feedback module 103 via the second feedback module 1013.

[0073] Specifically, in this embodiment, the control module 1011 includes a chip U5, a field-effect transistor Q2, and an output terminal U7A of an optocoupler; wherein, the chip U5 includes: a GATE pin, a comp pin, a vcc pin, and an FB pin, the GATE pin being electrically connected to the gate of the field-effect transistor Q2; the vcc pin being connected to the output terminal U7A of the chip U8. The pins are electrically connected; the comp pin is electrically connected to the collector of U7A, and the emitter of U7A is grounded to the FB pin.

[0074] Specifically, transformer module 1012 includes transformer T1, which comprises a primary winding and a secondary winding. The primary winding includes a terminal labeled 1 and a terminal labeled 3. The terminal labeled 1 is connected to chip U8. The pin is electrically connected to receive the V+ voltage (i.e., 24V DC voltage) from the external power supply input. The terminal labeled 3 is electrically connected to the drain of the field-effect transistor Q2 in the control module 1011. The secondary winding includes a terminal labeled 6 and a terminal labeled 4; the terminal labeled 6 is electrically connected to the positive terminal of diode D8 for outputting 12V DC voltage; the terminal labeled 4 is connected in series with capacitor CY1 and then grounded. In this embodiment, by adjusting the turns ratio of the primary and secondary windings of transformer T1, the conversion between the input and output voltage can be achieved to meet the voltage requirements of the signal receiving module 102 and the first feedback module 103.

[0075] Specifically, in this embodiment of the application, the second feedback module 1013 further includes: a comparator U9 and an input terminal U7B of an optocoupler; wherein, U7B is a light-emitting diode, the negative terminal of the light-emitting diode is electrically connected to pin 2 of the comparator U9, and pins 1 and 3 of the comparator U9 are connected in parallel with resistor R29.

[0076] It should be noted that when the output voltage of the secondary winding is too high, the load voltage output by the secondary winding is divided by resistors R28 and R29. After voltage division, the voltage of resistor R29 is compared with the reference voltage of comparator U9. If it is greater than the reference voltage, comparator U9 conducts to form a circuit, and the input terminal U7B of the optocoupler generates a feedback signal. The feedback signal is sent to the output terminal U7A of the optocoupler as an optical signal through opto-splitting. The output terminal U7A of the optocoupler converts the optical signal into an electrical signal and feeds the electrical signal back to the comp pin of chip U5. Chip U5 controls the on / off state of the primary winding through the switching transistor Q2, thereby controlling the on / off state of transformer T1.

[0077] In some optional embodiments, the dimming control circuit further includes: a voltage regulator output module 50, which is electrically connected to the second voltage conversion module 402; wherein, the voltage regulator output module 50 includes an output terminal U12A of a first optocoupler, a chip U11, and a chip U13; the output terminal U12A of the first optocoupler includes: a collector, an emitter, and a base; the chip U13 includes... pins, The chip U11 includes a VDD pin and a GND pin; The pin is electrically connected to the second voltage conversion module 402 to receive the second voltage output by the second voltage conversion module 402. The pin is electrically connected to the collector and VDD pin; the emitter and GND pins are grounded; the base receives the optical signal sent by the input terminal U12B of the first optocoupler; the pc2 pin outputs the fourth voltage.

[0078] Specifically, in this embodiment of the application, chip U13's Pins and chip U8 Electrical connection, used to receive the 12V VCC voltage output from chip U8, and chip U13. The pin is electrically connected to the VDD pin of chip U11 to supply power to chip U11; in addition, chip U13's... The pin is also electrically connected to the collector of U12A, and the emitter of U12A is connected to ground in series with resistor R9; the pc2 pin of chip U11 is connected in series with resistor R11 to output a voltage of 0~5V.

[0079] It should be noted that in this embodiment, the output terminal U12A of the optocoupler receives the optical signal sent by the input terminal U12B and converts the optical signal into an electrical signal, thereby driving U12A to work; it can be understood that by controlling the state of the output terminal U12A of the optocoupler, the voltage output by chip U13 to chip U11 is adjusted, thereby controlling the output voltage of chip U11.

[0080] In some optional embodiments, the dimming control circuit further includes: a PWM pulse width modulation module 60; the PWM pulse width modulation module 60 is electrically connected to the first voltage conversion module 401, the regulated output module 50, the second dimming circuit 20, and the light-emitting device; wherein, the PWM pulse width modulation module 60 includes: a first operational amplifier, the first operational amplifier including: a non-inverting input terminal, an inverting input terminal, a positive power supply terminal, a negative power supply terminal, and an output terminal; the non-inverting input terminal is electrically connected to the pc2 pin and receives the fourth voltage output by the pc2 pin; the inverting input terminal is electrically connected to the light-emitting device; the positive power supply terminal is grounded; the negative power supply terminal is electrically connected to the first voltage conversion module 401 and receives the first voltage output by the first voltage conversion module 401; the output terminal is electrically connected to the second dimming circuit 20 and outputs a PWM signal to the second dimming circuit 20.

[0081] Specifically, in this embodiment, pin 1 of the first operational amplifier U14 is the output terminal, used to output a PWM signal; pin 2 is the negative power supply terminal grounded; pin 3 is the non-inverting input terminal, used to receive the 5V voltage output by the voltage regulator output module 50; pin 4 is the inverting input terminal, electrically connected to CON5 and CON6, wherein CON5 and CON6 are electrically connected to the light-emitting device; and pin 5 is the positive power supply terminal, electrically connected to the first voltage conversion module 401, used to receive the 9V voltage output by the first voltage conversion module 401.

[0082] In some optional embodiments, the second dimming circuit 20 further includes: a fourth connector and a chip U1; the chip U1 includes: a DA1 pin, a DA2 pin, a PWM pin, and an R pin; the fourth connector is electrically connected to the chip U1; the R pin is electrically connected to the output of the first operational amplifier and receives the PWM signal output by the first operational amplifier, and the PWM pin outputs a first signal; the fourth connector receives an input second dimming control signal and outputs the second dimming control signal to the DA2 pin, and the PWM pin outputs a second signal; the fourth connector receives an input third dimming control signal and outputs the third dimming control signal to the DA1 pin, and the PWM pin outputs a third signal.

[0083] Specifically, in this embodiment, the second dimming circuit 20 comprises a DALI dimming circuit and a PUSH dimming circuit. The fourth connector is CON2, which includes four pins. Pins 1 and 2 form a group for receiving the DALI dimming control signal input from the DALI dimmer; pins 3 and 4 form a group for receiving the PUSH dimming control signal input from the PUSH dimmer. Further, chip U1 also includes a DA1 pin and a DA2 pin, where the DA1 pin receives the PUSH dimming control signal, and the DA2 pin receives the DALI dimming control signal. The R pin of chip U1 is electrically connected to the output of operational amplifier U14 to receive PWM signals.

[0084] It should be noted that when neither the DA1 nor DA2 pins receive a dimming control signal, 0-10V dimming is performed. Chip U1 generates a first signal based on the PWM signal input from the R pin. When the DA2 pin receives a DALI dimming control signal, DALI dimming is performed on the light-emitting device. Chip U1 generates a second signal based on the PWM signal input from the R pin and outputs the second signal through the PWM pin. When the DA1 pin receives a DALI dimming control signal, PUSH dimming is performed on the light-emitting device. Chip U1 generates a third signal based on the PWM signal input from the R pin and outputs the third signal through the PWM pin.

[0085] In some optional embodiments, the second dimming circuit 20 includes: a second operational amplifier, a first field-effect transistor, a first Zener diode, and a first resistor; the chip U1 also includes an ERC pin; wherein, the cathode of the first Zener diode is electrically connected to the voltage input module 30 and the light-emitting device, the anode of the first Zener diode is electrically connected to the drain of the first field-effect transistor, the gate of the first field-effect transistor is electrically connected to the PWM pin, and the source of the first field-effect transistor is electrically connected to the non-inverting input terminal of the second operational amplifier; the inverting input terminal of the second operational amplifier is electrically connected to the first terminal of the first resistor, the second terminal of the first resistor is grounded to the positive power supply terminal of the second operational amplifier, the negative power supply terminal of the second operational amplifier is electrically connected to the first voltage conversion module 401, the output terminal of the second operational amplifier is electrically connected to the R pin; and the ERC pin is electrically connected to the output terminal of the second operational amplifier.

[0086] Specifically, in this embodiment, the output of the second operational amplifier U3 is electrically connected to the ERC pin of the chip U1 to send an electrical signal to the chip U1. The chip U1 determines whether the dimming control signal received by the DA1 pin and the DA2 pin is a DALI dimming control signal or a PUSH dimming control signal based on the electrical signal received by the ERC pin.

[0087] Furthermore, the negative terminal of the first Zener diode D1 is electrically connected to the voltage input module 30 to receive the V+ DC voltage from the external power supply input. The positive terminal of the first Zener diode D1 is electrically connected to the drain of the first field-effect transistor Q1. The gate of the first field-effect transistor Q1 is electrically connected to the PWM pin of the chip U1. The source of the first field-effect transistor is connected to the ground in series with the resistor R6.

[0088] It should be noted that in this embodiment, the first Zener diode D1 is used to short-circuit protect the first field-effect transistor Q1; the conduction state of the first field-effect transistor Q1 is controlled according to the signal output from the PWM pin, thereby controlling the voltage output to the light-emitting device and adjusting the brightness of the light-emitting device.

[0089] Based on the same concept, embodiments of this application provide a dimmer, which is used to input a dimming control signal to a dimming control circuit of any one of the first aspects, the dimming control signal including at least one of a first dimming control signal, a second dimming control signal and a third dimming control signal.

[0090] Based on the same concept, embodiments of this application provide a lighting device, including a light-emitting device and a dimming control circuit as described in any one of the first aspects, wherein the dimming control circuit drives the light-emitting device according to any one of a first signal, a second signal and a third signal.

[0091] The dimming control circuit of this application embodiment receives a dimming signal with a voltage range of 0-10V through a first dimming circuit and outputs a first signal; and receives a DALI dimming control signal and a PUSH dimming control signal through a second dimming circuit 20 and outputs a second signal and a third signal respectively; and drives the light-emitting device according to at least one of the first signal, the second signal, and the third signal. This application embodiment solves the technical problem in the prior art that dimming circuits cannot simultaneously support 0-10V dimming, DALI dimming, and PUSH dimming; it improves the flexibility of lamp adjustment and effectively enhances the user experience.

[0092] Those skilled in the art will understand that the steps, measures, and solutions in the various operations, methods, and processes discussed in the embodiments of this application can be alternated, modified, combined, or deleted. Furthermore, other steps, measures, and solutions in the various operations, methods, and processes discussed in the embodiments of this application can also be alternated, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and solutions in related technologies that are similar to those disclosed in the embodiments of this application can also be alternated, modified, rearranged, decomposed, combined, or deleted.

[0093] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this application, unless otherwise stated, "a plurality of" means two or more.

[0094] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0095] The above are only some embodiments of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application, without departing from the technical concept of this application, also fall within the protection scope of this application.

Claims

1. A dimming control circuit, characterized in that, include: First dimming circuit and second dimming circuit; The first dimming circuit receives a first dimming control signal and outputs a first signal. The first dimming control signal includes a dimming signal with a voltage within a preset range; The second dimming circuit receives a second dimming control signal and outputs a second signal; the second dimming control signal includes a DALI dimming signal. The second dimming circuit receives a third dimming control signal and outputs a third signal; the third dimming control signal includes a PUSH dimming signal. The dimming circuit inputs any one of the first signal, the second signal, and the third signal to the light-emitting device.

2. The dimming control circuit according to claim 1, characterized in that, The dimming control circuit further includes: a voltage input module and a voltage conversion module connected in sequence; The voltage input module includes a first connector and a second connector; the first connector and the second connector are connected to an external power supply and receive the DC voltage input from the external power supply. The voltage conversion module includes: a first voltage conversion module and a second voltage conversion module; The first voltage conversion module converts the DC voltage input by the voltage input module into a first voltage; the second voltage conversion module converts the DC voltage input by the voltage input module into a second voltage.

3. The dimming control circuit according to claim 2, characterized in that, The first dimming circuit includes: a third voltage conversion module, a signal receiving module, and a first feedback module, which are electrically connected in pairs; the first feedback module includes: the input terminal of a first optocoupler; the signal receiving module includes: a third connector; The third voltage conversion module is electrically connected to the voltage input module, converts the DC voltage input by the voltage input module into a third voltage, and outputs the third voltage to the signal receiving module and the first feedback module. The third connector receives the input first dimming control signal and outputs the first dimming control signal to the first feedback module. The first feedback module drives the input end of the first optocoupler to send an optical signal according to the first dimming control signal.

4. The dimming control circuit according to claim 3, characterized in that, The third voltage conversion module further includes: a control module, a transformer module, and a second feedback module that are connected in sequence. The control module receives the DC voltage input from the voltage input module, converts the DC voltage into a third voltage via the transformer module, and outputs the third voltage to the signal receiving module and the first feedback module via the second feedback module.

5. The dimming control circuit according to claim 4, characterized in that, The dimming control circuit further includes: a voltage regulated output module, which is electrically connected to the second voltage conversion module; The voltage regulation output module includes the output terminal of a first optocoupler, chip U11, and chip U13; the output terminal of the first optocoupler includes a collector, an emitter, and a base; chip U13 includes... pins, The chip U11 includes a VDD pin and a GND pin; the chip U11 includes a VDD pin and a pc2 pin. The The pin is electrically connected to the second voltage conversion module to receive the second voltage output by the second voltage conversion module; The pin is electrically connected to the collector and the VDD pin; the emitter and the GND pin are grounded; the base receives the optical signal sent from the input terminal of the first optocoupler; the pc2 pin outputs a fourth voltage.

6. The dimming control circuit according to claim 5, characterized in that, The dimming control circuit further includes a PWM pulse width modulation module; the PWM pulse width modulation module is electrically connected to the first voltage conversion module, the voltage regulation output module, the second dimming circuit, and the light-emitting device. The PWM pulse width modulation module includes a first operational amplifier, which includes a non-inverting input terminal, an inverting input terminal, a positive power supply terminal, a negative power supply terminal, and an output terminal. The non-inverting input terminal is electrically connected to the pc2 pin and receives the fourth voltage output by the pc2 pin; the inverting input terminal is electrically connected to the light-emitting device; the positive power supply terminal is grounded; the negative power supply terminal is electrically connected to the first voltage conversion module and receives the first voltage output by the first voltage conversion module; the output terminal is electrically connected to the second dimming circuit and outputs a PWM signal to the second dimming circuit.

7. The dimming control circuit according to claim 6, characterized in that, The second dimming circuit further includes: a fourth connector and a chip U1; the chip U1 includes: a DA1 pin, a DA2 pin, a PWM pin, and an R pin; the fourth connector is electrically connected to the chip U1; The R pin is electrically connected to the output terminal of the first operational amplifier, receives the PWM signal output by the first operational amplifier, and the PWM pin outputs the first signal; The fourth connector receives the input second dimming control signal, outputs the second dimming control signal to the DA2 pin, and the PWM pin outputs the second signal; The fourth connector receives the input third dimming control signal and outputs the third dimming control signal to the DA1 pin, while the PWM pin outputs the third signal.

8. The dimming control circuit according to claim 7, characterized in that, The second dimming circuit further includes: a second operational amplifier, a first field-effect transistor, a first Zener diode, and a first resistor; the chip U1 also includes an ERC pin; The cathode of the first Zener diode is electrically connected to the voltage input module and the light-emitting device, the anode of the first Zener diode is electrically connected to the drain of the first field-effect transistor, the gate of the first field-effect transistor is electrically connected to the PWM pin, and the source of the first field-effect transistor is electrically connected to the positive input terminal of the second operational amplifier. The inverting input terminal of the second operational amplifier is electrically connected to the first terminal of the first resistor, the second terminal of the first resistor is grounded to the positive power supply terminal of the second operational amplifier, the negative power supply terminal of the second operational amplifier is electrically connected to the first voltage conversion module, the output terminal of the second operational amplifier is electrically connected to the R pin, and the ERC pin is electrically connected to the output terminal of the second operational amplifier.

9. A dimmer, characterized in that, The dimmer is used to input a dimming control signal to the dimming control circuit according to any one of claims 1-8, the dimming control signal including at least one of a first dimming control signal, a second dimming control signal and a third dimming control signal.

10. A lighting device, characterized in that, It includes a light-emitting device connected in sequence and a dimming control circuit as described in any one of claims 1-8, wherein the dimming control circuit drives the light-emitting device according to any one of the first signal, the second signal, and the third signal.

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