CN114096033A

CN114096033A - Self-dimming and external dimming two-in-one dimming system

Info

Publication number: CN114096033A
Application number: CN202111329385.2A
Authority: CN
Inventors: 蒙之赞; 饶连江
Original assignee: Wac Lighting Technology Shanghai Co ltd; Dongguan WAC Lighting Co Ltd
Current assignee: Wac Lighting Technology Shanghai Co ltd; Dongguan WAC Lighting Co Ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-02-25

Abstract

The invention relates to the technical field of dimming control, in particular to a self-dimming and external dimming two-in-one dimming system which comprises an MCU (microprogrammed control unit) signal processing module, an external dimming module, a self-dimming module and a constant-current dimming module, wherein the constant-current dimming module comprises a constant-current circuit module and a PWM (pulse-width modulation) dimming circuit module, the constant-current circuit module is connected with the PWM dimming circuit module, the output end of the PWM dimming circuit module is connected with an LED (light-emitting diode) load, and the MCU signal processing module is respectively connected with the external dimming module, the self-dimming module and the constant-current circuit module. The invention has ingenious and novel design, the final product realizes the light modulation with a knob and the external 0-10V/PWM light modulation superposition, the two light modulation modes can simultaneously carry out light modulation, and any one of the two light modulation modes can be used for carrying out independent light modulation, thereby finally meeting the requirements of different scenes.

Description

Self-dimming and external dimming two-in-one dimming system

Technical Field

The invention relates to the technical field of dimming control, in particular to a self-dimming and external dimming two-in-one dimming system.

Background

The LED driving power supply is a power converter which converts power supply into specific voltage and current to drive the LED to emit light, and the input of the LED driving power supply comprises high-voltage power frequency alternating current, low-voltage direct current, high-voltage direct current, low-voltage high-frequency alternating current and the like. In the prior art, the existing LED power supply driving circuit generally only has one dimming mode, the dimming mode is single, dimming can not be performed on the complicated LED lamp in the dimming mode, the application range is low, and the market needs can not be met.

Disclosure of Invention

The invention provides a self-dimming and external dimming two-in-one dimming system aiming at the problems in the prior art, the design is ingenious and novel, the self-dimming module can be a knob dimming module, and the dimming of a knob can be realized by adjusting and driving the knob dimming module; the external dimming module is used for externally connecting a 0-10V dimmer or a PWM dimmer and can realize one-to-one or one-to-many dimming; the constant current dimming module is a DC-DC constant current dimming module and comprises a constant current circuit and a PWM dimming circuit, wherein the constant current circuit can obtain a constant current value, so that the LED load works in a constant current state, the constant current value is changed, and the brightness of the LED load can be changed; the PWM dimming circuit module changes the PWM input duty ratio and can also change the brightness of an LED load, the final product of the invention realizes the dimming with a knob and the external dimming of 0-10V/PWM, and the two dimming modes can simultaneously carry out dimming and can also use any one of the dimming modes to carry out independent dimming, thereby finally meeting the requirements of different scenes.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention provides a self-dimming and external dimming two-in-one dimming system which comprises an MCU (microprogrammed control unit) signal processing module, an external dimming module, a self-dimming module and a constant-current dimming module, wherein the constant-current dimming module comprises a constant-current circuit module and a PWM (pulse-width modulation) dimming circuit module, the constant-current circuit module is connected with the PWM dimming circuit module, the output end of the PWM dimming circuit module is connected with an LED (light-emitting diode) load, and the MCU signal processing module is respectively connected with the external dimming module, the self-dimming module and the constant-current circuit module;

the MCU signal processing module is provided with a DIM-1-10V interface and a DIM-0-10V/PWM interface, the DIM-1-10V interface is used for being connected with the self-adjusting module, the self-adjusting module is used for changing the voltage or current input to an LED load, and the DIM-0-10V/PWM interface is used for being externally connected with a 0-10V dimmer or a PWM dimmer.

The self-dimming module comprises a zener diode Z9, a capacitor C14, a transistor Q8, a capacitor C17, a resistor R49, a resistor R50, a resistor R51 and an adjustable resistor VR1, wherein the zener diode Z9 is connected with the capacitor C14 in parallel, the anode of the zener diode Z9 is connected with the cathode of the DIM-1-10V interface, the cathode of the zener diode Z9 is connected with the anode of the DIM-1-10V interface, the collector of the transistor Q8 is connected with the cathode of a zener diode Z9, the emitter of the transistor Q8 is connected with the anode of the zener diode Z9, one end of the resistor R49 is connected with the collector of the transistor Q8, the other end of the resistor R49 is connected with one end of an adjustable resistor VR1, the base of the transistor Q8 is connected with one end of a resistor R51, and the other end of the resistor R51 is connected with the adjustment end of the adjustable resistor VR1, one end of the resistor R50 is connected with the other end of the adjustable resistor VR1, the other end of the resistor R50 is connected with the emitter of the triode Q8, and two ends of the capacitor C17 are respectively connected with the other end of the resistor R51 and the other end of the resistor R50.

Wherein, the MCU signal processing module comprises a control chip U5, a resistor R37, a resistor R38, a resistor R39, a capacitor C21, a zener diode Z1, a zener diode TVS, a diode D7, a temperature-sensitive resistor PTC, a resistor R47 and a J2 connecting port, a AD 5 pin of the control chip U5 is connected with one end of the resistor R5, the other end of the resistor R5 is grounded, the capacitor C5 is connected with the resistor R5 in parallel, one end of the resistor R5 is connected with one end of the resistor R5, the other end of the resistor R5 is connected with one end of the resistor R5, one end of the resistor R5 and the anode of the diode D5, the other end of the resistor R5 is connected with a DIM pin of the control chip U5, the J5 connecting port is connected with a DIM pin of the control chip U5 through the resistor R5, the cathode of the zener diode Z5 is connected with the anode of the diode D5, the anode of the zener diode Z5 is grounded, the cathode of the TVS of the diode TVS is connected with the cathode of the diode TVS 5, and the cathode of the diode D7 is connected with the DIM-0-10V/PWM interface through a temperature sensitive resistor PTC.

The MCU signal processing module further comprises a resistor R42, a resistor R41, a resistor R40, a resistor R43, a capacitor C20 and a zener diode Z2, one end of the resistor R42 is connected with an AD2 pin of a control chip U5, the other end of the resistor R42 is grounded, the capacitor C20 is connected with the resistor R42 in parallel, one end of the resistor R41 is connected with one end of a resistor R42, the other end of the resistor R41 is respectively connected with one end of the resistor R40, one end of the resistor R43 and the cathode of the zener diode Z2, the anode of the zener diode Z2 is grounded, and the other end of the resistor R43 is connected with the DIM-1-10V interface.

The model of the control chip U5 is STM8S 001.

Wherein, the J2 connection port is a reserved Bluetooth control port.

The MCU signal processing module further comprises a J1 connecting port connected with a control chip U5, and the J1 connecting port is an internal program writing port.

The automatic dimming and external dimming two-in-one dimming system further comprises a rectifying and filtering module, an AC-DC constant voltage isolation module and a DC-DC constant voltage power supply module, wherein the output end of the rectifying and filtering module is connected with the input end of the AC-DC constant voltage isolation module, the output end of the AC-DC constant voltage isolation module is respectively connected with the input end of the DC-DC constant voltage power supply module, the input end of the constant current circuit module and the input end of the PWM dimming circuit module, and the constant voltage power supply module is used for supplying power to the MCU signal processing module, the self-dimming module and the external dimming module.

The constant-voltage power supply module comprises a control chip U1, wherein the model of the control chip U1 is LD 1117A; the AC-DC constant voltage isolation module comprises a control chip U3, and the model of the control chip U3 is IW 3627.

The constant current circuit module comprises a control chip U2, and the model of the control chip U2 is MP 9486; the PWM dimming circuit module comprises a control chip U4, and the model of the control chip U4 is MP 24894.

The invention has the beneficial effects that:

the invention has ingenious and novel design, the self-adjusting light module can be a knob light module, and the one-to-one knob light modulation can be realized by adjusting and driving the knob light module; the external dimming module is used for externally connecting a 0-10V dimmer or a PWM dimmer and can realize one-to-one or one-to-many dimming; the constant current dimming module is a DC-DC constant current dimming module and comprises a constant current circuit and a PWM dimming circuit, wherein the constant current circuit can obtain a constant current value, so that the LED load works in a constant current state, the constant current value is changed, and the brightness of the LED load can be changed; the PWM dimming circuit module changes the PWM input duty ratio and can also change the brightness of an LED load, the final product of the invention realizes the dimming with a knob and the external dimming of 0-10V/PWM, and the two dimming modes can simultaneously carry out dimming and can also use any one of the dimming modes to carry out independent dimming, thereby finally meeting the requirements of different scenes.

Drawings

Fig. 1 is a schematic block diagram of a self-dimming and external dimming two-in-one dimming system according to the present invention.

Fig. 2 is a circuit diagram of the MCU signal processing module and the DC-DC constant voltage power supply module of the present invention.

Fig. 3 is a circuit diagram of the self-dimming module of the present invention.

Fig. 4 is a circuit diagram of the constant current circuit module of the present invention.

Fig. 5 is a circuit diagram of the PWM dimming circuit module according to the present invention.

Fig. 6 is a circuit diagram of an AC-DC constant voltage isolation module of the present invention.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention is described in detail below with reference to the attached drawings.

A self-dimming and external dimming two-in-one dimming system is shown in figures 1 to 6 and comprises an MCU (microprogrammed control unit) signal processing module, an external dimming module, a self-dimming module and a constant-current dimming module, wherein the constant-current dimming module comprises a constant-current circuit module and a PWM (pulse-width modulation) dimming circuit module, the constant-current circuit module is connected with the PWM dimming circuit module, the output end of the PWM dimming circuit module is connected with an LED (light-emitting diode) load, and the MCU signal processing module is respectively connected with the external dimming module, the self-dimming module, the constant-current circuit module and the PWM dimming circuit module;

The self-adjusting light module can be a knob light module, and one-to-one knob light modulation can be realized by adjusting and driving the knob light module; the external dimming module is used for externally connecting a 0-10V dimmer or a PWM dimmer and can realize one-to-one or one-to-many dimming; the constant current dimming module is a DC-DC constant current dimming module and comprises a constant current circuit and a PWM dimming circuit, wherein the constant current circuit can obtain a constant current value, so that the LED load works in a constant current state, the constant current value is changed, and the brightness of the LED load can be changed; the PWM dimming circuit module changes the PWM input duty ratio and can also change the brightness of an LED load, the final product of the invention realizes the dimming with a knob and the external dimming of 0-10V/PWM, and the two dimming modes can simultaneously carry out dimming and can also use any one of the dimming modes to carry out independent dimming, thereby finally meeting the requirements of different scenes.

In this embodiment, the self-dimming module includes a zener diode Z9, a capacitor C14, a transistor Q8, a capacitor C17, a resistor R49, a resistor R50, a resistor R51, and an adjustable resistor VR1, the zener diode Z9 is connected in parallel with the capacitor C14, an anode of the zener diode Z9 is connected to a cathode of the DIM-1-10V interface, a cathode of the zener diode Z9 is connected to an anode of the DIM-1-10V interface, a collector of the transistor Q8 is connected to a cathode of the zener diode Z9, an emitter of the transistor Q8 is connected to an anode of the zener diode Z9, one end of the resistor R49 is connected to a collector of the transistor Q8, the other end of the resistor R49 is connected to one end of an adjustable resistor VR1, a base of the transistor Q8 is connected to one end of the resistor R51, and the other end of the resistor R51 is connected to an adjustment end of the adjustable resistor VR1, one end of the resistor R50 is connected with the other end of the adjustable resistor VR1, the other end of the resistor R50 is connected with the emitter of the triode Q8, and two ends of the capacitor C17 are respectively connected with the other end of the resistor R51 and the other end of the resistor R50. Specifically, the above setting realizes the self-dimming of the LED load by adjusting the adjustable resistor VR1, i.e. realizing the effect of knob dimming.

In this embodiment, the MCU signal processing module includes a control chip U5, a resistor R37, a resistor R38, a resistor R39, a capacitor C21, a zener diode Z1, a zener diode TVS, a diode D7, a temperature sensitive resistor PTC, a resistor R47, and a J2 connection port, wherein an AD1 pin of the control chip U5 is connected to one end of the resistor R39, the other end of the resistor R39 is grounded, the capacitor C21 is connected in parallel to the resistor R39, one end of the resistor R39 is connected to one end of the resistor R38, the other end of the resistor R38 is connected to one end of the resistor R37, one end of the resistor R47, and an anode of the diode D7, the other end of the resistor R47 is connected to a DIM pin of the control chip U5, the J2 is connected to a DIM pin of the control chip U5 through the resistor R47, a cathode of the zener diode Z1 is connected to an anode of the diode D7, an anode of the zener diode Z1 is grounded, an anode of the zener diode Z1, a cathode of the TVS is connected to a cathode of the TVS 7, and the cathode of the diode D7 is connected with the DIM-0-10V/PWM interface through a temperature sensitive resistor PTC. Specifically, the DIM-0-10V/PWM interface is used for externally connecting a 0-10V dimmer or a PWM dimmer, and external dimming of the LED load is realized through the connection mode.

In this embodiment, the MCU signal processing module further includes a resistor R42, a resistor R41, a resistor R40, a resistor R43, a capacitor C20, and a zener diode Z2, wherein one end of the resistor R42 is connected to an AD2 pin of the control chip U5, the other end of the resistor R42 is grounded, the capacitor C20 is connected to the resistor R42 in parallel, one end of the resistor R41 is connected to one end of the resistor R42, the other end of the resistor R41 is connected to one end of the resistor R40, one end of the resistor R43, and a cathode of the zener diode Z2, an anode of the zener diode Z2 is grounded, and the other end of the resistor R43 is connected to the DIM-1-10V interface. The model of the control chip U5 is STM8S 001.

Specifically, the J2 connection port is a reserved bluetooth control port. The J2 connector is used for realizing the access of a Bluetooth control module, when the Bluetooth control module is accessed, the PWM dimming circuit module is directly controlled by the resistor R47 to output corresponding LED control current, and the corresponding PWM1 connector is disconnected so as to realize the dimming of an LED load; if the Bluetooth module control and the self-dimming control are adopted, a Bluetooth control signal is connected to a PWM1 port, and meanwhile, a resistor R47 is disconnected, so that an AD1 pin is influenced by the PWM1 port, an AD2 pin is influenced by the DIM2 port, and finally, after the processing, a control signal DIM is output through a control chip U5, and the PWM dimming circuit module is controlled to output corresponding LED control current.

In this embodiment, the MCU signal processing module further includes a J1 connector connected to the control chip U5, and the J1 connector is an internal programming port. Particularly, the MCU signal processing module is convenient to program.

In this embodiment, the self-dimming and external dimming two-in-one dimming system further includes a rectifying and filtering module, an AC-DC constant voltage isolation module, and a DC-DC constant voltage power supply module, an output end of the rectifying and filtering module is connected to an input end of the AC-DC constant voltage isolation module, an output end of the AC-DC constant voltage isolation module is connected to an input end of the DC-DC constant voltage power supply module, an input end of the constant current circuit module, and an input end of the PWM dimming circuit module, respectively, and the constant voltage power supply module is configured to supply power to the MCU signal processing module, the self-dimming module, and the external dimming module. Specifically, the rectification and filtering module comprises a rectification circuit and a filtering circuit, wherein the rectification circuit rectifies alternating current connected to an AC input port into direct current, and the direct current is obtained after passing through the filtering circuit and is smoother and conforms to EMC standard; the AC-DC constant voltage isolation module is connected with the rectification filter module, and the direct current voltage obtained by the rectification filter module is converted into another direct current low voltage which is more convenient and safe by an isolation transformer through a flyback converter and is supplied to the constant current circuit module and the DC-DC constant voltage power supply module for use; the switching tube is repeatedly switched on and off in one period, so that the purpose of transforming the input direct current is achieved.

The DC-DC constant voltage power supply module is connected with the AC-DC constant voltage isolation module, and converts electric energy into direct current low voltage which is used by the MCU signal processing module, the self-adjusting light module and the external light adjusting module through the BUCK and LDO voltage reduction circuit.

The external dimming module is connected with the MCU signal processing module, and the external 0-10V dimmer or the PWM dimmer can realize one-to-one or one-to-many dimming with the dimming depth of 0% -100%, wherein the DIM-0-10V/PWM interface (0-10V/PWM dimming port) has the function of preventing misconnection of high-voltage power, even if misconnection of the AC220V has no influence on products; the function of preventing misconnection of high voltage electricity is a common conventional technology in other fields of electronics, and is not described herein again.

The MCU signal processing module is connected with the DC-DC constant current dimming module, can simultaneously receive knob dimming (self-dimming module) and external 0-10V/PWM (external dimming module) dimming signals (simultaneously compatible with two dimming cores), performs analysis and calculation according to the collected dimming signals, and provides proper PWM signals for the DC-DC constant current dimming module.

The DC-DC constant-current dimming module comprises a constant-current circuit module and a PWM dimming circuit module, wherein the constant-current circuit module can obtain a constant current value, so that the LED lamp works in a constant-current state, the constant current value is changed, and the brightness of the LED lamp can be changed; and the PWM dimming circuit module can change the PWM input duty ratio and also can change the brightness of the LED lamp. And the DC-DC constant-current dimming module receives the PWM signal returned by the MCU signal processing module so as to control the current of the LED. The LED load realizes that the LED load displays different brightness according to the output current of the DC-DC constant current dimming module.

The final product realizes dimming superposition with a knob (self-dimming module) and external 0-10V/PWM (external dimming module). The two dimming modes can simultaneously perform dimming, and any one dimming mode can also be used for performing independent dimming, so that different scene requirements are finally met.

In this embodiment, the constant voltage power supply module includes a control chip U1, and the model of the control chip U1 is LD 1117A; the AC-DC constant voltage isolation module comprises a control chip U3, and the model of the control chip U3 is IW 3627.

In this embodiment, the constant current circuit module includes a control chip U2, and the model of the control chip U2 is MP 9486; the PWM dimming circuit module comprises a control chip U4, and the model of the control chip U4 is MP 24894.

Although the present invention has been described with reference to the above preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a two unification dimming systems of self-modulation and external dimming which characterized in that: the LED dimming device comprises an MCU signal processing module, an external dimming module, a self-regulating module and a constant-current dimming module, wherein the constant-current dimming module comprises a constant-current circuit module and a PWM dimming circuit module, the constant-current circuit module is connected with the PWM dimming circuit module, the output end of the PWM dimming circuit module is connected with an LED load, and the MCU signal processing module is respectively connected with the external dimming module, the self-regulating module, the constant-current circuit module and the PWM dimming circuit module; the MCU signal processing module is provided with a DIM-1-10V interface and a DIM-0-10V/PWM interface, the DIM-1-10V interface is used for being connected with the self-adjusting module, the self-adjusting module is used for changing the voltage or current input to an LED load, and the DIM-0-10V/PWM interface is used for being externally connected with a 0-10V dimmer or a PWM dimmer.

2. The self-dimming and external dimming two-in-one dimming system according to claim 1, wherein: the self-adjusting optical module comprises a zener diode Z9, a capacitor C14, a triode Q8, a capacitor C17, a resistor R49, a resistor R50, a resistor R51 and an adjustable resistor VR1, wherein the zener diode Z9 is connected with the capacitor C14 in parallel, the anode of the zener diode Z9 is connected with the cathode of the DIM-1-10V interface, the cathode of the zener diode Z9 is connected with the anode of the DIM-1-10V interface, the collector of the triode Q8 is connected with the cathode of a zener diode Z9, the emitter of the triode Q8 is connected with the anode of the zener diode Z9, one end of the resistor R49 is connected with the collector of the triode Q8, the other end of the resistor R49 is connected with one end of an adjustable resistor VR1, the base of the triode Q8 is connected with one end of a resistor R51, the other end of the resistor R51 is connected with the adjustable end of the VR1, one end of the resistor R50 is connected with the other end of the adjustable resistor VR1, the other end of the resistor R50 is connected with the emitter of the triode Q8, and two ends of the capacitor C17 are respectively connected with the other end of the resistor R51 and the other end of the resistor R50.

3. The self-dimming and external dimming two-in-one dimming system according to claim 1, wherein: the MCU signal processing module comprises a control chip U5, a resistor R37, a resistor R38, a resistor R39, a capacitor C21, a zener diode Z1, a zener diode TVS, a diode D7, a temperature-sensitive resistor PTC, a resistor R47 and a J2 connection port, wherein an AD1 pin of the control chip U5 is connected with one end of the resistor R39, the other end of the resistor R39 is grounded, the capacitor C21 is connected with the resistor R39 in parallel, one end of the resistor R39 is connected with one end of the resistor R38, the other end of the resistor R38 is connected with one end of the resistor R37, one end of the resistor R47 and the anode of the diode D7, the other end of the resistor R47 is connected with a DIM pin of the control chip U5, the J2 connection port is connected with a DIM pin of the control chip U5 through the resistor R47, the cathode of the zener diode Z1 is connected with the anode of the diode D7, the anode of the zener diode Z1 is grounded, the anode of the zener diode S of the tvS 7 is connected with the cathode of the TVD 73784, and the cathode of the diode D7 is connected with the DIM-0-10V/PWM interface through a temperature sensitive resistor PTC.

4. A self-dimming and external dimming two-in-one dimming system according to claim 3, wherein: the MCU signal processing module further comprises a resistor R42, a resistor R41, a resistor R40, a resistor R43, a capacitor C20 and a voltage-stabilizing diode Z2, one end of the resistor R42 is connected with an AD2 pin of a control chip U5, the other end of the resistor R42 is grounded, the capacitor C20 is connected with the resistor R42 in parallel, one end of the resistor R41 is connected with one end of a resistor R42, the other end of the resistor R41 is respectively connected with one end of the resistor R40, one end of the resistor R43 and the cathode of the voltage-stabilizing diode Z2, the anode of the voltage-stabilizing diode Z2 is grounded, and the other end of the resistor R43 is connected with the DIM-1-10V interface.

5. The self-dimming and external dimming two-in-one dimming system according to claim 3 or 4, wherein: the model of the control chip U5 is STM8S 001.

6. A self-dimming and external dimming two-in-one dimming system according to claim 3, wherein: the J2 connection port is a reserved Bluetooth control port.

7. A self-dimming and external dimming two-in-one dimming system according to claim 3, wherein: the MCU signal processing module also comprises a J1 connecting port connected with a control chip U5, and the J1 connecting port is an internal program writing port.

8. The self-dimming and external dimming two-in-one dimming system according to claim 1, wherein: the automatic dimming and external dimming two-in-one dimming system further comprises a rectifying and filtering module, an AC-DC constant voltage isolation module and a DC-DC constant voltage power supply module, wherein the output end of the rectifying and filtering module is connected with the input end of the AC-DC constant voltage isolation module, the output end of the AC-DC constant voltage isolation module is respectively connected with the input end of the DC-DC constant voltage power supply module, the input end of the constant current circuit module and the input end of the PWM dimming circuit module, and the constant voltage power supply module is used for supplying power to the MCU signal processing module, the self-adjusting module and the external dimming module.

9. The self-dimming and external dimming two-in-one dimming system according to claim 8, wherein: the constant-voltage power supply module comprises a control chip U1, and the model of the control chip U1 is LD 1117A; the AC-DC constant voltage isolation module comprises a control chip U3, and the model of the control chip U3 is IW 3627.

10. The self-dimming and external dimming two-in-one dimming system as claimed in claim 1 or 7, wherein: the constant current circuit module comprises a control chip U2, and the model of the control chip U2 is MP 9486; the PWM dimming circuit module comprises a control chip U4, and the model of the control chip U4 is MP 24894.