CN111050445A - Intelligent dimming circuit and method for LED lamp illumination driving and LED device - Google Patents
Intelligent dimming circuit and method for LED lamp illumination driving and LED device Download PDFInfo
- Publication number
- CN111050445A CN111050445A CN202010001689.5A CN202010001689A CN111050445A CN 111050445 A CN111050445 A CN 111050445A CN 202010001689 A CN202010001689 A CN 202010001689A CN 111050445 A CN111050445 A CN 111050445A
- Authority
- CN
- China
- Prior art keywords
- component
- main circuit
- signal
- duty ratio
- pulse signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention belongs to the technical field of electronic circuits, and provides an intelligent dimming circuit, a method and an LED device for LED lamp illumination driving, wherein the intelligent dimming circuit comprises a main circuit component, a discharge component, an intelligent component, a duty ratio detection component, a main circuit starting detection component, a wire net detection component, a main circuit switch control component and a discharge switch control component, wherein the duty ratio detection component is used for detecting the duty ratio of a pulse signal output by the intelligent component, the main circuit starting detection component is used for confirming a main circuit starting signal, the wire net detection component is used for confirming a wire net periodic signal, and when the duty ratio of the main circuit starting signal is controlled to be consistent with the duty ratio of the pulse signal, the intelligent dimming of an LED lamp string can be realized; meanwhile, the bleeder component is kept closed in the current network period after the main circuit component is detected to be started, so that the effect of reducing power consumption is achieved; and when the duty ratio of the pulse signal is detected to be zero continuously in the preset time period, the discharge assembly is controlled to maintain the closed state, and the reduction of the standby power consumption is realized.
Description
Technical Field
The invention belongs to the technical field of electronic circuits, and particularly relates to an intelligent dimming circuit and method for LED lamp illumination driving and an LED device.
Background
In a control system of an electronic circuit, when a thyristor is connected and is switched on, a minimum maintaining current is needed, and if the current of the system is less than the minimum maintaining current, the thyristor is gradually closed; when the main current is PWM (Pulse Width Modulation) waveform, the thyristor can be caused to continuously enter the switching state, and the voltage of the line network can generate sawtooth wave, thereby affecting the waveform of the main current. In a traditional scheme, a PWM signal directly controls the current of a main circuit, and in order to enable the main circuit to work normally, the bleeder current needs to be kept in a always-on state, so that the power consumption of a system is overlarge; and, when the intelligent module is in standby, the bleed cannot be closed.
Therefore, in the existing LED lamp lighting driving technology, in order to enable the main circuit to work normally, the bleeder current needs to be maintained in a always-on state, which causes the power consumption of the system to be too large; and when the intelligent module is in standby, the problem that the drainage can not be closed is solved.
Disclosure of Invention
The invention aims to provide an intelligent dimming circuit, a method and an LED device for LED lamp illumination driving, and aims to solve the problems that in the existing LED lamp illumination driving technology, in order to enable a main circuit to work normally, a leakage current needs to be maintained in a always-on state, so that the system power consumption is overlarge; and when the intelligent module is in standby, the problem that the drainage can not be closed is solved.
The invention provides a first aspect of an intelligent dimming circuit for driving an LED lamp, comprising:
a main path component and a bleeding component;
an intelligent component configured to generate a pulse signal;
the duty ratio detection component is connected with the intelligent component and is configured to detect the duty ratio of the pulse signal and transmit the pulse signal;
a main circuit starting detection component configured to confirm a main circuit starting signal and transmit the main circuit starting signal, wherein the duty ratio of the main circuit starting signal is consistent with the duty ratio of the pulse signal;
a net detection component configured to identify a net periodic signal and transmit the net periodic signal;
a main circuit switch control component, connected to the duty cycle detection component, the main circuit turn-on detection component and the net detection component, and configured to control the main circuit component to turn on or off according to the pulse signal, the main circuit turn-on signal and the net periodic signal; and
the bleeder switch control assembly is connected with the duty ratio detection assembly, the main circuit starting detection assembly and the wire network detection assembly and is configured to control the bleeder assembly to keep closed in the current wire network period after the main circuit assembly is started according to the main circuit starting signal and the wire network period signal; or when the duty ratio of the pulse signal is detected to be zero continuously in a preset time period, controlling the discharge assembly to maintain the closed state.
Preferably, the method further comprises the following steps:
and the rectifying component is connected with the intelligent component and is configured to output the voltage signal output by the alternating current power supply to the intelligent component after rectification processing.
Preferably, the method further comprises the following steps:
and the fusing component is connected with the rectifying component and is configured to perform fusing processing when the voltage signal output by the alternating current power supply exceeds a preset threshold value.
Preferably, the wire mesh detection assembly comprises:
a first resistor, a second resistor and a third comparator;
the first end of the first resistor is connected with a reference voltage, the second end of the first resistor and the first end of the second resistor are connected with a positive phase input end of the third comparator, an inverted phase input end of the third comparator is connected with a reference voltage, and an output end of the third comparator is connected with the main circuit switch control component.
Preferably, the bleeding component is implemented by using an operational amplifier.
Preferably, the main path component and the main path startup detection component are both implemented by using comparators.
Preferably, the rectifying component is implemented by a rectifying bridge.
Preferably, the fuse assembly includes:
fuses and varistors;
the first end of the fuse is connected with the live wire end of the alternating current power supply, the second end of the fuse and the first end of the piezoresistor are connected with the rectifying assembly, and the second end of the piezoresistor is connected with the zero line end of the alternating current power supply.
The invention provides an LED device, which comprises an LED lamp string and an alternating current power supply, and further comprises the intelligent dimming circuit.
The third aspect of the present invention provides a smart dimming method for LED lamp lighting driving, the smart dimming method comprising:
generating a pulse signal;
detecting the duty ratio of the pulse signal and transmitting the pulse signal;
confirming a main circuit starting signal and transmitting the main circuit starting signal, wherein the duty ratio of the main circuit starting signal is consistent with that of the pulse signal;
confirming a net periodic signal and transmitting the net periodic signal;
controlling the main circuit to conduct corresponding conduction or disconnection according to the pulse signal, the main circuit starting signal and the line network periodic signal;
according to the main circuit starting signal and the line network periodic signal, the bleeder current is controlled to be kept off in the current line network period after the main circuit is conducted; or when the duty ratio of the pulse signal is detected to be zero continuously in a preset time period, controlling the leakage current to maintain the off state.
The invention provides an intelligent dimming circuit, a method and an LED device for LED lamp illumination driving, which comprise a main circuit component, a discharge component, an intelligent component, a duty ratio detection component, a main circuit starting detection component, a wire net detection component, a main circuit switch control component and a discharge switch control component, wherein the duty ratio detection component is used for detecting the duty ratio of a pulse signal output by the intelligent component; the bleeder component is kept closed in the current network period after the main circuit component is detected to be opened, namely the bleeder component is only required to be kept opened before the main circuit component is opened, so that the effect of reducing power consumption is achieved; and when the duty ratio of the pulse signal is detected to be zero continuously in a preset time period, the bleeder component is controlled to maintain the off state until the duty ratio of the pulse signal is detected to be not zero next time, so that the standby power consumption is reduced, and the problem that in the existing LED lamp illumination driving technology, in order to enable a main circuit to work normally, the bleeder current needs to be maintained in a always-on state, so that the system power consumption is overlarge is solved; and when the intelligent module is in standby, the problem that the drainage can not be closed is solved.
Drawings
Fig. 1 is a schematic block diagram of an intelligent dimming circuit for driving an LED lamp according to an embodiment of the present invention.
Fig. 2 is a schematic block diagram of an intelligent dimming circuit for driving an LED lamp according to another embodiment of the present invention.
Fig. 3 is an exemplary circuit diagram of the smart dimming circuit for LED lamp lighting driving corresponding to fig. 2.
Fig. 4 is a schematic waveform diagram of a current signal in the intelligent dimming circuit for LED lamp lighting driving according to the present invention.
Fig. 5 is a flowchart illustrating steps of a smart dimming method for LED lamp lighting driving according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
According to the intelligent dimming circuit, the method and the LED device for LED lamp illumination driving, when the duty ratio of the main circuit starting signal is controlled to be consistent with the duty ratio of the pulse signal, intelligent dimming of the LED lamp string can be achieved; meanwhile, the bleeder component is kept closed in the current network period after the main circuit component is detected to be started, so that the effect of reducing power consumption is achieved; and when the duty ratio of the pulse signal is detected to be zero continuously in the preset time period, the discharge assembly is controlled to maintain the closed state, and the reduction of the standby power consumption is realized.
Fig. 1 shows a module structure of an intelligent dimming circuit for LED lamp illumination driving according to an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment are shown, and the details are as follows:
the above-mentioned intelligent dimming circuit for LED lamp illumination driving includes a main circuit component 106, a bleeding component 108, an intelligent component 101, a duty ratio detection component 102, a main circuit turn-on detection component 105, a line network detection component 104, a main circuit switch control component 103, and a bleeding switch control component 107.
The intelligent component 101 is configured to generate a pulse signal.
The duty ratio detection component 102 is connected to the intelligent component 101, and is configured to detect a duty ratio of the pulse signal and transmit the pulse signal.
Main path turn-on detection component 105 is configured to assert a main path turn-on signal and transmit the main path turn-on signal; and the duty ratio of the main circuit starting signal is consistent with that of the pulse signal.
The net detection component 104 is configured to identify a net cycle signal and transmit the net cycle signal.
The main switch control component 103 is connected to the duty ratio detection component 102, the main turn-on detection component 105, and the net detection component 104, and configured to control the main component 106 to turn on or off according to the pulse signal, the main turn-on signal, and the net period signal.
The bleeder switch control component 107 is connected to the duty ratio detection component 102, the main path startup detection component 105, and the net detection component 104, and configured to control the bleeder component 108 to keep off in the current net period after the main path component 106 is started according to the main path startup signal and the net period signal; or when the duty ratio of the pulse signal is continuously zero within the preset time period, the bleeding component 108 is controlled to maintain the closed state until the duty ratio of the pulse signal is detected to be not zero next time.
Specifically, the intelligent dimming circuit is connected to a thyristor, and the intelligent component 101 is configured to generate a pulse signal, that is, a PWM signal, and transmit the pulse signal to the duty ratio detection component 102 to detect the duty ratio of the PWM signal, so as to obtain the duty ratio of the PWM signal; the main circuit starting detection component 105 confirms the main circuit starting signal, so that the duty ratio of the main circuit starting signal is obtained, the duty ratio of the main circuit starting signal is controlled to be consistent with the duty ratio of the pulse signal, and the intelligent dimming effect of the LED lamp string is achieved.
Secondly, the main circuit switch control component 103 controls the main circuit component 106 to be correspondingly turned on or off according to the pulse signal, the main circuit turn-on signal and the line network periodic signal;
the bleeder switch control assembly 107 controls the bleeder assembly 108 to be correspondingly turned on or off according to the main path turn-on signal and the line network periodic signal;
more importantly, the bleeding component 108 is kept off in the current net period after the main component 106 is turned on, and the bleeding component 108 only needs to be kept on before the main component 106 is turned on, so that the power consumption is reduced.
And when detecting that the duty ratio of the pulse signal is continuously 0% in a period of time, the bleeding component 108 is kept closed for a long time until detecting that the duty ratio is not 0%, thereby reducing the standby power consumption. The preset time can be set according to actual requirements.
Fig. 2 shows a module structure of an intelligent dimming circuit for LED lamp illumination driving according to another embodiment of the present invention, and for convenience of description, only the parts related to this embodiment are shown, and the details are as follows:
as an embodiment of the present invention, the smart dimming circuit further includes a rectifying component 109, and the rectifying component 109 is connected to the smart component 101 and configured to rectify a voltage signal output by the ac power supply 111 and output the rectified voltage signal to the smart component 101.
Specifically, the rectifying component 109 is implemented by full-bridge rectification, but may also be implemented by half-bridge rectification.
As an embodiment of the present invention, the intelligent dimming circuit further includes a fuse element 110, where the fuse element 110 is connected to the rectifying element 109, and is configured to perform a fuse process when a voltage signal output by the ac power supply 111 exceeds a preset threshold, so as to avoid a problem of damaging components of the overall circuit due to overvoltage and overcurrent.
Fig. 3 shows an example circuit of the smart dimming circuit for LED lamp lighting driving corresponding to fig. 2, and for convenience of explanation, only the parts related to the present embodiment are shown, and detailed as follows:
in an embodiment of the invention, the net detecting module 104 includes a first resistor R1, a second resistor R2, and a third comparator U3.
The first end of the first resistor R1 is connected to the reference voltage VIN, the second end of the first resistor R1 and the first end of the second resistor R2 are connected to the non-inverting input terminal of the third comparator U3, the inverting input terminal of the third comparator U3 is connected to the reference voltage, and the output terminal of the third comparator U3 is connected to the main switch control module 103.
As an embodiment of the present invention, the bleeding component 108 is implemented by an operational amplifier U4.
As an embodiment of the present invention, the main path component 106 and the main path startup detection component 105 are implemented by using comparators, in fig. 3, the main path component 106 is represented by a first comparator U1, and the main path startup detection component 105 is represented by a second comparator U2.
As an embodiment of the present invention, the rectifying component 109 is implemented by using a rectifying bridge DB 1.
The fuse assembly 110 includes a fuse FR1 and a varistor RV1 according to an embodiment of the present invention.
The first end of the fuse FR1 is connected with the live wire end of the alternating current power supply 111, the second end of the fuse FR1 and the first end of the piezoresistor RV1 are connected with the rectifying assembly 109, and the second end of the piezoresistor RV1 is connected with the neutral wire end of the alternating current power supply 111.
The invention also provides an LED device which comprises the LED lamp string, an alternating current power supply and the intelligent dimming circuit.
It should be noted that, the LED device is added with an LED string and an ac power supply on the basis of the above-mentioned smart dimming circuit, so that the functional description and the principle description of the smart component 101, the duty ratio detection component 102, the main circuit switch control component 103, the net detection component 104, the main circuit start detection component 105, the main circuit component 106, the bleeder switch control component 107, the bleeder component 108, the rectification component 109, and the fuse component 110 in the smart dimming circuit can refer to the embodiments of fig. 1 to 3, and are not repeated herein.
Fig. 4 shows waveforms of current signals in the smart dimming circuit for LED lamp illumination driving according to the present invention, and the following describes the operation principle of the smart dimming circuit with reference to fig. 4:
firstly, the duty ratio detection component 102 detects the duty ratio of the PWM signal, and times at the rising edge of the main circuit startup signal V6 according to the corresponding duty ratio to control the main circuit startup duration;
secondly, when a rising edge of V6 is detected, the bleeding switch control assembly 107 sends a closing signal to the bleeding assembly 108 to control the bleeding assembly 108 to close;
finally, the above control logic resets each time a falling edge of V5 is detected.
Fig. 5 shows a flow of steps of the intelligent dimming method for LED lamp illumination driving according to the present invention, and for convenience of description, only the parts related to the present embodiment are shown, and the detailed description is as follows:
the invention also provides an intelligent dimming method for LED lamp illumination driving, which comprises the following steps:
s101, generating a pulse signal;
s102, detecting the duty ratio of the pulse signal and transmitting the pulse signal;
s103, confirming a main circuit starting signal and transmitting the main circuit starting signal, wherein the duty ratio of the main circuit starting signal is consistent with that of the pulse signal;
s104, confirming a network periodic signal and transmitting the network periodic signal;
s105, controlling the main circuit to conduct corresponding conduction or disconnection according to the pulse signal, the main circuit starting signal and the line network periodic signal;
s106, controlling the bleeder current to keep off in the current line network period after the main circuit is conducted according to the main circuit opening signal and the line network period signal; or when the duty ratio of the pulse signal is detected to be zero continuously in a preset time period, controlling the leakage current to maintain the off state.
Therefore, the duty ratio of the main circuit starting signal is controlled to be consistent with the duty ratio of the pulse signal, so that the intelligent dimming effect of the LED lamp string is realized; meanwhile, the bleeder component 108 is kept closed in the current net period after the main component 106 is turned on, thereby reducing power consumption; and when the duty ratio of the pulse signal is detected to be zero continuously in the preset time period, the discharge assembly is controlled to maintain the closed state, and the reduction of the standby power consumption is realized.
To sum up, the intelligent dimming circuit, the method and the LED device for LED lamp illumination driving provided by the embodiments of the present invention include a main circuit component, a bleeding component, an intelligent component, a duty ratio detection component, a main circuit turn-on detection component, a wire net detection component, a main circuit switch control component and a bleeding switch control component, wherein the duty ratio detection component is configured to detect a duty ratio of a pulse signal output by the intelligent component, the main circuit turn-on detection component is configured to confirm a main circuit turn-on signal, the wire net detection component is configured to confirm a wire net period signal, and when the duty ratio of the main circuit turn-on signal is controlled to be consistent with the duty ratio of the pulse signal output by the intelligent component, intelligent dimming of the LED lamp string can be achieved; the bleeder component is kept closed in the current network period after the main circuit component is detected to be opened, namely the bleeder component is only required to be kept opened before the main circuit component is opened, so that the effect of reducing power consumption is achieved; and when the duty ratio of the pulse signal is detected to be zero continuously in a preset time period, the bleeder component is controlled to maintain the off state until the duty ratio of the pulse signal is detected to be not zero next time, so that the standby power consumption is reduced, and the problem that in the existing LED lamp illumination driving technology, in order to enable a main circuit to work normally, the bleeder current needs to be maintained in a always-on state, so that the system power consumption is overlarge is solved; and when the intelligent module is in standby, the problem that the drainage can not be closed is solved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An intelligent dimming circuit for driving an LED lamp to illuminate, comprising:
a main path component and a bleeding component;
an intelligent component configured to generate a pulse signal;
the duty ratio detection component is connected with the intelligent component and is configured to detect the duty ratio of the pulse signal and transmit the pulse signal;
a main circuit starting detection component configured to confirm a main circuit starting signal and transmit the main circuit starting signal, wherein the duty ratio of the main circuit starting signal is consistent with the duty ratio of the pulse signal;
a net detection component configured to identify a net periodic signal and transmit the net periodic signal;
a main circuit switch control component, connected to the duty cycle detection component, the main circuit turn-on detection component and the net detection component, and configured to control the main circuit component to turn on or off according to the pulse signal, the main circuit turn-on signal and the net periodic signal; and
the bleeder switch control assembly is connected with the duty ratio detection assembly, the main circuit starting detection assembly and the wire network detection assembly and is configured to control the bleeder assembly to keep closed in the current wire network period after the main circuit assembly is started according to the main circuit starting signal and the wire network period signal; or when the duty ratio of the pulse signal is detected to be zero continuously in a preset time period, controlling the discharge assembly to maintain the closed state.
2. The smart dimming circuit of claim 1, further comprising:
and the rectifying component is connected with the intelligent component and is configured to output the voltage signal output by the alternating current power supply to the intelligent component after rectification processing.
3. The smart dimming circuit of claim 2, further comprising:
and the fusing component is connected with the rectifying component and is configured to perform fusing processing when the voltage signal output by the alternating current power supply exceeds a preset threshold value.
4. The smart dimming circuit of claim 1, wherein the net detection component comprises:
a first resistor, a second resistor and a third comparator;
the first end of the first resistor is connected with a reference voltage, the second end of the first resistor and the first end of the second resistor are connected with a positive phase input end of the third comparator, an inverted phase input end of the third comparator is connected with a reference voltage, and an output end of the third comparator is connected with the main circuit switch control component.
5. The smart dimming circuit of claim 1, wherein the bleeding component is implemented using an operational amplifier.
6. The smart dimming circuit of claim 1, wherein the main circuit component and the main circuit turn-on detection component are both implemented with comparators.
7. The smart dimming circuit of claim 2, wherein the rectifying component is implemented using a rectifier bridge.
8. The smart dimming circuit of claim 3, wherein the fuse assembly comprises:
fuses and varistors;
the first end of the fuse is connected with the live wire end of the alternating current power supply, the second end of the fuse and the first end of the piezoresistor are connected with the rectifying assembly, and the second end of the piezoresistor is connected with the zero line end of the alternating current power supply.
9. An LED device comprising a string of LEDs and an ac power source, wherein the LED device further comprises the smart dimmer circuit as claimed in any one of claims 1 to 8.
10. A smart dimming method for LED lamp illumination driving, the smart dimming method comprising:
generating a pulse signal;
detecting the duty ratio of the pulse signal and transmitting the pulse signal;
confirming a main circuit starting signal and transmitting the main circuit starting signal, wherein the duty ratio of the main circuit starting signal is consistent with that of the pulse signal;
confirming a net periodic signal and transmitting the net periodic signal;
controlling the main circuit to conduct corresponding conduction or disconnection according to the pulse signal, the main circuit starting signal and the line network periodic signal;
according to the main circuit starting signal and the line network periodic signal, the bleeder current is controlled to be kept off in the current line network period after the main circuit is conducted; or when the duty ratio of the pulse signal is detected to be zero continuously in a preset time period, controlling the leakage current to maintain the off state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010001689.5A CN111050445A (en) | 2020-01-02 | 2020-01-02 | Intelligent dimming circuit and method for LED lamp illumination driving and LED device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010001689.5A CN111050445A (en) | 2020-01-02 | 2020-01-02 | Intelligent dimming circuit and method for LED lamp illumination driving and LED device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111050445A true CN111050445A (en) | 2020-04-21 |
Family
ID=70243767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010001689.5A Withdrawn CN111050445A (en) | 2020-01-02 | 2020-01-02 | Intelligent dimming circuit and method for LED lamp illumination driving and LED device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111050445A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108848598A (en) * | 2018-08-31 | 2018-11-20 | 厦门市必易微电子技术有限公司 | Module of releasing, LED drive circuit and driving method for controllable silicon dimmer |
| CN109041348A (en) * | 2018-08-31 | 2018-12-18 | 厦门市必易微电子技术有限公司 | Adaptive circuit module, the LED drive circuit with controllable silicon dimmer and method |
| CN109743810A (en) * | 2018-12-19 | 2019-05-10 | 深圳市晟碟半导体有限公司 | LED drive circuit, device and the driving method of compatible silicon controlled light modulator |
| WO2019233489A1 (en) * | 2018-06-08 | 2019-12-12 | 美芯晟科技（北京）有限公司 | Dimmable led driving circuit and control method |
| CN110582144A (en) * | 2019-10-14 | 2019-12-17 | 深圳市明微电子股份有限公司 | adaptive bleeding control circuit and method |
| CN211352539U (en) * | 2020-01-02 | 2020-08-25 | 深圳市明微电子股份有限公司 | Intelligent dimming circuit for LED lamp illumination driving and LED device |
-
2020
- 2020-01-02 CN CN202010001689.5A patent/CN111050445A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019233489A1 (en) * | 2018-06-08 | 2019-12-12 | 美芯晟科技（北京）有限公司 | Dimmable led driving circuit and control method |
| CN108848598A (en) * | 2018-08-31 | 2018-11-20 | 厦门市必易微电子技术有限公司 | Module of releasing, LED drive circuit and driving method for controllable silicon dimmer |
| CN109041348A (en) * | 2018-08-31 | 2018-12-18 | 厦门市必易微电子技术有限公司 | Adaptive circuit module, the LED drive circuit with controllable silicon dimmer and method |
| CN109743810A (en) * | 2018-12-19 | 2019-05-10 | 深圳市晟碟半导体有限公司 | LED drive circuit, device and the driving method of compatible silicon controlled light modulator |
| CN110582144A (en) * | 2019-10-14 | 2019-12-17 | 深圳市明微电子股份有限公司 | adaptive bleeding control circuit and method |
| CN211352539U (en) * | 2020-01-02 | 2020-08-25 | 深圳市明微电子股份有限公司 | Intelligent dimming circuit for LED lamp illumination driving and LED device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108337764B (en) | Constant Voltage Output AC Phase Dimmable LED Driver | |
| US6304464B1 (en) | Flyback as LED driver | |
| AU2009238645B2 (en) | Photosensor circuits including a switch mode power converter | |
| US8339053B2 (en) | LED dimming apparatus | |
| AU2009308125B9 (en) | Photosensor circuits including a switch mode power converter | |
| US11641704B2 (en) | Load control device configured to operate in two-wire and three-wire modes | |
| CN104883799B (en) | Control method, control circuit, system and LED lamp for LED driving | |
| EP3160025B1 (en) | Voltage set-up automatic matching circuits | |
| AU2010203058A1 (en) | Switch mode power converter | |
| CN104106311A (en) | Led lamp with half wave dimming | |
| CN211352539U (en) | Intelligent dimming circuit for LED lamp illumination driving and LED device | |
| WO2011097203A1 (en) | Photosensor circuits including a current amplifier | |
| CN211184370U (en) | Low-power consumption single live wire switch light modulator | |
| CN111050445A (en) | Intelligent dimming circuit and method for LED lamp illumination driving and LED device | |
| US8502518B2 (en) | Power supply device for light sources, such as halogen lamps, and related method | |
| CN212259393U (en) | LED driver circuit | |
| CN211019319U (en) | Control circuit compatible with silicon controlled rectifier dimmer | |
| CN211267189U (en) | LED driving power supply circuit | |
| CN210629925U (en) | LED control circuit and device compatible with silicon controlled rectifier dimmer | |
| CN111970793B (en) | LED driving circuit, control method thereof and LED driving device | |
| CN204578859U (en) | A kind of wall controlled LED lamp list live wire light adjusting circuit | |
| CN215187479U (en) | Light modulation circuit | |
| CN110769544B (en) | Control circuit and control method compatible with thyristor dimmer | |
| CN210246606U (en) | Switch, wall switch and wall switch for supplying power to load | |
| CN102510621B (en) | Bias voltage establishing device of controller used for light-emitting diode lighting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200421 |