CN113939061A - Light emitting unit driving circuit and electronic device - Google Patents

Light emitting unit driving circuit and electronic device Download PDF

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Publication number
CN113939061A
CN113939061A CN202111121162.7A CN202111121162A CN113939061A CN 113939061 A CN113939061 A CN 113939061A CN 202111121162 A CN202111121162 A CN 202111121162A CN 113939061 A CN113939061 A CN 113939061A
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CN
China
Prior art keywords
circuit
sub
emitting unit
signal
light
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Pending
Application number
CN202111121162.7A
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Chinese (zh)
Inventor
郑希成
肖悦赏
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Shenzhen Neoway Technology Co Ltd
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Shenzhen Neoway Technology Co Ltd
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Priority to CN202111121162.7A priority Critical patent/CN113939061A/en
Publication of CN113939061A publication Critical patent/CN113939061A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/36—Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The application provides a luminescence unit drive circuit and electronic equipment for drive luminescence unit, luminescence unit drive circuit includes first filter sub-circuit, second filter sub-circuit and drive sub-circuit, first filter sub-circuit is used for receiving first control signal, and convert first control signal into first signal of telecommunication, second filter sub-circuit is used for receiving first signal of telecommunication, and convert first signal of telecommunication into the second signal of telecommunication, drive sub-circuit is used for driving luminescence unit according to the second signal of telecommunication, wherein, the second signal of telecommunication is compared in first signal of telecommunication and is approached to the direct current signal of telecommunication. The first filter sub-circuit and the second filter sub-circuit convert the first control signal into a second electric signal finally, and the second electric signal is close to a direct current electric signal compared with the first electric signal, so that the stroboflash of the light-emitting unit is not easy to cause. Meanwhile, the circuit structure of the light-emitting unit driving circuit is simple, and the cost is low.

Description

Light emitting unit driving circuit and electronic device
Technical Field
The present disclosure relates to circuit control technologies, and particularly to a light emitting unit driving circuit and an electronic device.
Background
At present, light-emitting diode (LED) breathing lamps are generally integrated in electronic devices, wherein most of the LED breathing lamps are controlled by an integrated chip, or the LED breathing lamps are directly controlled by Pulse Width Modulation (PWM) signals, which easily causes technical problems of high cost, stroboscopic effect of the LED breathing lamps, and the like.
Disclosure of Invention
The application discloses a light-emitting unit driving circuit, which can solve the technical problems of high cost and stroboflash.
In a first aspect, the present application provides a light emitting unit driving circuit for driving a light emitting unit, the light emitting unit driving circuit includes a first filter sub-circuit, a second filter sub-circuit and a driving sub-circuit, the first filter sub-circuit is configured to receive a first control signal and convert the first control signal into a first electrical signal, the second filter sub-circuit is configured to receive the first electrical signal and convert the first electrical signal into a second electrical signal, the driving sub-circuit is configured to drive the light emitting unit according to the second electrical signal, wherein the second electrical signal is compared with the first electrical signal and approaches to a dc electrical signal.
The first filtering sub-circuit and the second filtering sub-circuit convert the first control signal into the second electrical signal, and the second electrical signal is closer to a direct current electrical signal than the first electrical signal, so that the stroboflash of the light-emitting unit is not easy to cause. Meanwhile, the circuit structure of the light-emitting unit driving circuit is simple, and the cost is low.
Optionally, the light-emitting unit driving circuit further includes a voltage control sub-circuit, the voltage control sub-circuit is respectively electrically connected to the first filter sub-circuit and the second filter sub-circuit, and when the voltage control sub-circuit is a voltage follower, the voltage control sub-circuit buffers the first dc signal.
Optionally, when the voltage control sub-circuit is a transport amplifier, the voltage control sub-circuit amplifies the first direct current signal.
Optionally, the voltage control sub-circuit includes a first terminal, a second terminal and a third terminal, the first terminal is electrically connected to the first filtering module, and the second terminal is electrically connected to the third terminal and electrically connected to the second filtering module.
Optionally, the first filter sub-circuit includes a first resistor and a first capacitor, one end of the first resistor is used for receiving the first control signal, the other end of the first resistor is electrically connected to one end of the first capacitor, and the other end of the first capacitor is grounded.
Optionally, the capacitance value of the first capacitor is positively correlated to the conversion degree of the first filter sub-circuit to the first control signal.
Optionally, the second filter sub-circuit includes a second resistor and a second capacitor, one end of the second resistor is used for receiving the first electrical signal, the other end of the second resistor is electrically connected to one end of the second capacitor, and the other end of the second capacitor is grounded.
Optionally, the driving sub-circuit includes at least one field effect transistor, a gate of the field effect transistor is configured to receive the second electrical signal, a drain of the field effect transistor is configured to be electrically connected to one end of the light emitting unit, and a source of the field effect transistor is grounded.
Optionally, the first control signal is a PWM signal, and the voltage value of the second electrical signal is in positive correlation with the duty ratio of the first control signal.
In a second aspect, the present application further provides an electronic device, which includes the light-emitting unit driving circuit and the light-emitting unit according to the first aspect, wherein the light-emitting unit driving circuit is configured to drive the light-emitting unit to emit light.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for a person skilled in the art to obtain other drawings based on the drawings without any inventive exercise.
Fig. 1 is a schematic diagram of a light-emitting unit driving circuit framework according to an embodiment of the present disclosure.
Fig. 2 is a schematic diagram of a voltage control sub-circuit according to an embodiment of the present disclosure.
Fig. 3 is a schematic diagram of a first filter sub-circuit according to an embodiment of the present disclosure.
Fig. 4 is a schematic diagram of a second filter sub-circuit according to an embodiment of the present disclosure.
Fig. 5 is a schematic diagram of a driving sub-circuit according to an embodiment of the present disclosure.
Fig. 6 is a schematic top view of an electronic device according to an embodiment of the present disclosure.
Description of reference numerals: the light-emitting device comprises a light-emitting unit driving circuit-1, a first filter sub-circuit-11, a first resistor-111, a first capacitor-112, a second filter sub-circuit-12, a second resistor-121, a second capacitor-122, a driving sub-circuit-13, a field effect transistor-131, a voltage control sub-circuit-14, a first terminal-141, a second terminal-142, a third terminal-143, an electronic device-2 and a light-emitting unit-21.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
Referring to fig. 1, fig. 1 is a schematic diagram of a light emitting unit driving circuit 1 according to an embodiment of the present disclosure. The light emitting unit driving circuit 1 includes a first filter sub-circuit 11, a second filter sub-circuit 12, and a driving sub-circuit 13, where the first filter sub-circuit 11 is configured to receive a first control signal and convert the first control signal into a first electrical signal, the second filter sub-circuit 12 is configured to receive the first electrical signal and convert the first electrical signal into a second electrical signal, and the driving sub-circuit 13 is configured to drive the light emitting unit 21 according to the second electrical signal, where the second electrical signal is closer to a dc electrical signal than the first electrical signal.
The main reason why the light emitting unit 21 is strobed is that the electric signal for driving the light emitting unit 21 to emit light is unstable.
In this embodiment, the first filter sub-circuit 11 performs a filtering process on the first control signal and converts the first control signal into the first electrical signal, which is similar to a direct current electrical signal. Further, the second filter sub-circuit 12 converts the first electrical signal into the second electrical signal, so that the second electrical signal is closer to the dc electrical signal, thereby having a stable voltage output. The driving sub-circuit 13 drives the light emitting unit 21 according to the second electrical signal, so that the light emitting unit 21 stably emits light, and the problem of stroboscopic light of the light emitting unit 21 is avoided.
It can be understood that, in the embodiment, the first filter sub-circuit 11 and the second filter sub-circuit 12 finally convert the first control signal into the second electrical signal, and the second electrical signal is closer to a dc electrical signal than the first electrical signal, so that the stroboscopic of the light-emitting unit 21 is not easily caused. Meanwhile, the circuit structure of the light-emitting unit driving circuit 1 is simple, and the cost is low.
In a possible implementation manner, referring to fig. 1 again, the light emitting unit driving circuit 1 further includes a voltage control sub-circuit 14, the voltage control sub-circuit 14 is electrically connected to the first filter sub-circuit 11 and the second filter sub-circuit 12, respectively, and when the voltage control sub-circuit 14 is a voltage follower, the voltage control sub-circuit 14 buffers the first direct current signal.
Specifically, when the voltage control sub-circuit 14 is a voltage follower, the voltage control sub-circuit 14 has the functions of buffering and improving the carrying capacity. The voltage control subcircuit 14 is typically placed in the circuit when a weaker electrical signal is required to drive a load that requires a relatively higher current. It can be understood that, in the present embodiment, the voltage control sub-circuit 14 improves the load capacity to some extent, and simultaneously ensures that the waveform and amplitude of the electrical signal are unchanged.
In a possible embodiment, when the voltage control sub-circuit 14 is a transport amplifier, the voltage control sub-circuit 14 amplifies the first direct current signal.
Similarly, the voltage control sub-circuit 14 may also be a transport amplifier, and when the voltage control sub-circuit 14 is a transport amplifier, the voltage control sub-circuit 14 is further configured to amplify the amplitude of the first electrical signal, so that the output of the first electrical signal has a larger voltage/current value to drive the light emitting unit 21 to emit light.
In one possible implementation, please refer to fig. 2, and fig. 2 is a schematic diagram of a voltage control sub-circuit according to an embodiment of the present disclosure. The voltage control sub-circuit 14 includes a first terminal 141, a second terminal 142 and a third terminal 143, the first terminal 141 is electrically connected to the first filter module, and the second terminal 142 is electrically connected to the third terminal 143 and electrically connected to the second filter module.
Specifically, as shown in fig. 2, an electrical connection manner of the voltage control sub-circuit 14 is provided for an embodiment of the present application. It is understood that, in other possible embodiments, when the voltage control sub-circuit 14 is a different electronic component, the electrical connection manner of the voltage control sub-circuit 14 may be different, and the application is not limited thereto.
In one possible implementation, please refer to fig. 3, and fig. 3 is a schematic diagram of a first filter sub-circuit according to an embodiment of the present disclosure. The first filter sub-circuit 11 includes a first resistor 111 and a first capacitor 112, one end of the first resistor 111 is used for receiving the first control signal, the other end of the first resistor 111 is electrically connected to one end of the first capacitor 112, and the other end of the first capacitor 112 is grounded.
It should be noted that the first resistor 111 has a current limiting function, so as to prevent the current in the first filter sub-circuit 11 from being too large; the first capacitor 112 has the functions of filtering and buffering. It is understood that, in the present embodiment, the first resistor 111 and the first capacitor 112 form a first-order filter to filter the first control signal and convert the first control signal into the first electrical signal.
In a possible embodiment, the capacitance of the first capacitor 112 is positively correlated to the degree of conversion of the first control signal by the first filter sub-circuit 11.
Specifically, the capacitance value of the first capacitor 112 is positively correlated with the degree of conversion of the first control signal by the first filter sub-circuit 11, that is, the larger the capacitance value of the first capacitor 112 is, the larger the degree of conversion of the first control signal by the first filter sub-circuit 11 is; vice versa, the smaller the capacitance value of the first capacitor 112, the smaller the degree of conversion of the first control signal by the first filter sub-circuit 11.
The degree of conversion of the first control signal by the first filter sub-circuit 11 is the degree of similarity between the first electrical signal and the dc electrical signal, and it can be understood that the greater the degree of conversion of the first control signal by the first filter sub-circuit 11 is, the closer the first electrical signal is to the dc electrical signal.
It is understood that, in this embodiment, the capacitance of the first capacitor 112 is increased appropriately, so that the converted first electric signal can be smoother.
In one possible implementation, please refer to fig. 4, in which fig. 4 is a schematic diagram of a second filtering sub-circuit according to an embodiment of the present disclosure. The second filter sub-circuit 12 includes a second resistor 121 and a second capacitor 122, one end of the second resistor 121 is configured to receive the first electrical signal, the other end of the second resistor 121 is electrically connected to one end of the second capacitor 122, and the other end of the second capacitor 122 is grounded.
Similarly, the second resistor 121 has a current limiting function, so as to prevent the current in the second filter sub-circuit 12 from being too large; the second capacitor 122 has the functions of filtering and buffering. It is understood that, in the present embodiment, the second resistor 121, the second capacitor 122 and the first filter sub-circuit 11 together form a second-order filter to filter the first electrical signal and convert the first electrical signal into the second electrical signal.
In one possible implementation, please refer to fig. 5, and fig. 5 is a schematic diagram of a driving sub-circuit according to an embodiment of the present disclosure. The driving sub-circuit 13 includes at least one field effect transistor 131, a gate g of the field effect transistor 131 is configured to receive the second electrical signal, a drain d of the field effect transistor 131 is configured to be electrically connected to one end of the light emitting unit 21, and a source s of the field effect transistor is grounded.
It should be noted that, a conventional transistor is a current-driven electronic component, and in an amplification region of the transistor, a base of the transistor consumes more current. It is understood that, in this embodiment, the field effect transistor 131 is used to drive the light emitting unit 21 to emit light, so that excessive current consumption of the electrode of the field effect transistor 131 can be avoided. Meanwhile, the field effect transistor 131 has a stronger current capacity, and can drive the light emitting unit 21 to emit light better by a larger current/voltage.
In this embodiment, as shown in fig. 5, the anode of the light emitting unit 21 receives a voltage of 3.3V through a current limiting resistor, and the cathode of the light emitting unit 21 is electrically connected to the drain d of the fet 21. In other possible embodiments, the electrical connection mode of the light emitting unit 21 may be other modes, and the present application is not limited thereto.
It is understood that, in other possible embodiments, the driving sub-circuit 13 may further include other electronic components, which is not limited in this application.
In a possible embodiment, the first control signal is a PWM signal, and the voltage value of the second electrical signal is in positive correlation with the duty ratio of the first control signal.
Specifically, the first filter sub-circuit 11 converts the PWM signal into a dc signal, and the second filter sub-circuit 12 and the first filter sub-circuit 11 form a second order filter, so that the PWM signal can be further approached to the dc signal.
This arrangement may be such that, when the PWM signal with a certain duty ratio is transmitted to the gate of the fet 131, the second electrical signal is a constant voltage, and the voltage value of the second electrical signal may be adjusted by the duty ratio of the PWM signal, so that the voltage thereof is in the linear region of the fet 131, thereby controlling the magnitude of the current passing through the light emitting unit 21.
In the present embodiment, the current passing through the light emitting unit 21 is continuous, and the PWM signal only changes the magnitude of the current passing through the light emitting unit 21, so that the stroboscopic phenomenon is not caused. In addition, the frequency range of the PWM signal applied to the driving sub-circuit 13 of the light-emitting unit 21 provided by the present application is wider, and the output of the basic integrated chip can meet the breathing lamp requirement of the light-emitting unit 21.
Fig. 6 is a schematic top view of an electronic device 2 according to an embodiment of the present disclosure, and fig. 6 is a schematic top view of the electronic device. The electronic device 2 includes the light-emitting unit driving circuit 1 and the light-emitting unit 21, and the light-emitting unit driving circuit 1 is configured to drive the light-emitting unit 21 to emit light.
Specifically, please refer to the above description for the light emitting unit driving circuit 1, which is not described herein again. It is understood that the light emitting unit 21 may be integrated at a housing, a screen or a logo (logo) of the electronic device 2, which is not limited in this application.
It is understood that the electronic device 2 may be implemented in various forms. For example, the electronic device 2 described in the present application may include devices such as a mobile phone, a tablet computer, a notebook computer, a palm top computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and fixed devices such as a Digital TV, a desktop computer, and the like, which is not limited in this application.
The principle and the embodiment of the present application are explained herein by applying specific examples, and the above description of the embodiment is only used to help understand the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. A light-emitting unit driving circuit is used for driving a light-emitting unit and is characterized by comprising a first filtering sub-circuit, a second filtering sub-circuit and a driving sub-circuit, wherein the first filtering sub-circuit is used for receiving a first control signal and converting the first control signal into a first electric signal, the second filtering sub-circuit is used for receiving the first electric signal and converting the first electric signal into a second electric signal, and the driving sub-circuit is used for driving the light-emitting unit according to the second electric signal, wherein the second electric signal is closer to a direct current electric signal than the first electric signal.
2. The lighting unit driving circuit according to claim 1, wherein the lighting unit driving circuit further comprises a voltage control sub-circuit electrically connected to the first filter sub-circuit and the second filter sub-circuit, respectively, the voltage control sub-circuit buffering the first direct current signal when the voltage control sub-circuit is a voltage follower.
3. The lighting unit driving circuit according to claim 2, wherein the voltage control sub-circuit amplifies the first direct current signal when the voltage control sub-circuit is a transport amplifier.
4. The light-emitting unit driving circuit according to claim 2 or 3, wherein the voltage control sub-circuit comprises a first terminal, a second terminal and a third terminal, the first terminal is electrically connected to the first filter module, and the second terminal is electrically connected to the third terminal and to the second filter module.
5. The light-emitting unit driving circuit according to claim 1, wherein the first filter sub-circuit comprises a first resistor and a first capacitor, one end of the first resistor is used for receiving the first control signal, the other end of the first resistor is electrically connected to one end of the first capacitor, and the other end of the first capacitor is grounded.
6. The light-emitting unit driving circuit according to claim 5, wherein a capacitance value of the first capacitor is positively correlated with a degree of conversion of the first control signal by the first filter sub-circuit.
7. The light-emitting unit driving circuit according to claim 1, wherein the second filter sub-circuit comprises a second resistor and a second capacitor, one end of the second resistor is used for receiving the first electrical signal, the other end of the second resistor is electrically connected to one end of the second capacitor, and the other end of the second capacitor is grounded.
8. The light-emitting unit driving circuit according to claim 1, wherein the driving sub-circuit comprises at least one field-effect transistor, a gate of the field-effect transistor is configured to receive the second electrical signal, a drain of the field-effect transistor is configured to be electrically connected to one end of the light-emitting unit, and a source of the field-effect transistor is grounded.
9. The light-emitting unit driving circuit according to claim 1, wherein the first control signal is a PWM signal, and a voltage value of the second electric signal is in positive correlation with a duty ratio of the first control signal.
10. An electronic device, comprising the light-emitting unit driving circuit according to any one of claims 1 to 9 and a light-emitting unit, wherein the light-emitting unit driving circuit is configured to drive the light-emitting unit to emit light.
CN202111121162.7A 2021-09-24 2021-09-24 Light emitting unit driving circuit and electronic device Pending CN113939061A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111121162.7A CN113939061A (en) 2021-09-24 2021-09-24 Light emitting unit driving circuit and electronic device

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Application Number Priority Date Filing Date Title
CN202111121162.7A CN113939061A (en) 2021-09-24 2021-09-24 Light emitting unit driving circuit and electronic device

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0954365A (en) * 1995-08-17 1997-02-25 Canon Inc Electronic equipment
US20110101867A1 (en) * 2009-11-03 2011-05-05 Cal-Comp Electronics & Communications Company Limited Lighting apparatus, driving circuit of light emitting diode and driving method thereof
WO2020244670A1 (en) * 2019-06-06 2020-12-10 上海路傲电子科技有限公司 Control circuit, drive circuit, control method and illumination apparatus
CN212785955U (en) * 2020-07-01 2021-03-23 东莞市云烽智能科技有限公司 Silicon controlled rectifier dimming power supply without stroboscopic effect
CN112804791A (en) * 2021-02-04 2021-05-14 广东东菱电源科技有限公司 PWM control anti-flashback circuit and LED driving power supply
CN112996186A (en) * 2019-12-18 2021-06-18 安徽展晖电子科技有限公司 Pulse-controlled circuit unit, drive circuit, integrated circuit and lighting device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0954365A (en) * 1995-08-17 1997-02-25 Canon Inc Electronic equipment
US20110101867A1 (en) * 2009-11-03 2011-05-05 Cal-Comp Electronics & Communications Company Limited Lighting apparatus, driving circuit of light emitting diode and driving method thereof
WO2020244670A1 (en) * 2019-06-06 2020-12-10 上海路傲电子科技有限公司 Control circuit, drive circuit, control method and illumination apparatus
CN112996186A (en) * 2019-12-18 2021-06-18 安徽展晖电子科技有限公司 Pulse-controlled circuit unit, drive circuit, integrated circuit and lighting device
CN212785955U (en) * 2020-07-01 2021-03-23 东莞市云烽智能科技有限公司 Silicon controlled rectifier dimming power supply without stroboscopic effect
CN112804791A (en) * 2021-02-04 2021-05-14 广东东菱电源科技有限公司 PWM control anti-flashback circuit and LED driving power supply

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Application publication date: 20220114