CN113194585B - Lighting device without flicker during voltage reduction - Google Patents
Lighting device without flicker during voltage reduction Download PDFInfo
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- CN113194585B CN113194585B CN202110267512.4A CN202110267512A CN113194585B CN 113194585 B CN113194585 B CN 113194585B CN 202110267512 A CN202110267512 A CN 202110267512A CN 113194585 B CN113194585 B CN 113194585B
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- 239000011324 bead Substances 0.000 claims abstract description 106
- 238000001514 detection method Methods 0.000 claims abstract description 39
- 230000003287 optical effect Effects 0.000 claims description 22
- 238000005286 illumination Methods 0.000 claims description 19
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 206010034960 Photophobia Diseases 0.000 claims description 3
- 208000013469 light sensitivity Diseases 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000005669 field effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
- H05B47/14—Controlling the light source in response to determined parameters by determining electrical parameters of the light source
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention provides a voltage-reducing flicker-free lighting device, which relates to the field of lighting appliances and comprises: at least one lighting loop, wherein a plurality of lamp bead groups are connected in the lighting loop; the detection module is connected with two ends of a first lamp bead group in the lamp bead groups and is used for outputting a detection signal according to the voltage of the two ends of the first lamp bead group; the control module receives the detection signal, generates a first short-circuit signal if the detection signal fluctuates within a preset time period, and generates a second short-circuit signal if the detection signal continuously fluctuates when the first short-circuit signal is effective; the first execution module is connected with the control module and short-circuits a second lamp bead group in the lamp bead groups when the first short-circuit signal is effective; and the second execution module is connected with the control module and is used for enabling a third lamp bead group in the lamp bead groups to be short-circuited when the second short-circuit signal is effective. The invention reduces the real-time power on the lamp bead group, so that the lamp bead group can stop the self-protection function, and therefore, the lamp bead group does not flash.
Description
Technical Field
The invention relates to the field of illumination tools, in particular to a voltage-reducing flicker-free illumination device.
Background
The lamps are the general name of lighting tools and are divided into ceiling lamps, desk lamps, wall lamps, floor lamps and the like. Means capable of transmitting light, distributing and changing the light distribution of the light source, including all the parts necessary for fixing and protecting the light source, except the light source, and the necessary wiring accessories for connection to the power source. At present, the lighting application in the lamp has an overvoltage or overload protection function, namely when the input to the lamp exceeds the rated voltage or the rated load, the lamp can automatically start the self-protection function, so that the lamp stops acting to protect parts of the lamp from being damaged due to continuous work. When the lamp stops working, the lamp is restarted to start working because the input to the lamp meets the working condition. The lamp is turned on and off by repeating the operation, and thus the lamp flickers repeatedly. But for some special lamps, such as street lamps or tunnel lamps, flickering can cause visual impact to pedestrians or drivers, and even cause traffic safety hazards.
In the prior art, the problem of flickering of the lamp can not be conveniently and effectively solved.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a device for reducing voltage and having no flicker, which comprises:
at least one lighting loop, wherein a plurality of lamp bead groups are connected in the lighting loop;
The detection module is connected with two ends of a first lamp bead group in the lamp bead groups and is used for outputting a detection signal according to the voltage of the two ends of the first lamp bead group;
The control module is connected with the detection module, receives the detection signal, generates a first short-circuit signal if the detection signal fluctuates within a preset time period, and generates a second short-circuit signal if the detection signal continuously fluctuates when the first short-circuit signal is effective;
The first execution module is connected with the control module and short-circuits a second lamp bead group in the lamp bead groups when the first short-circuit signal is effective;
And the second execution module is connected with the control module and short-circuits a third lamp bead group in the lamp bead groups when the second short-circuit signal is effective.
Preferably, the device further comprises a driving module, wherein the driving module is connected with the illumination loop and used for driving the illumination loop to work.
Preferably, the control module comprises a drive control output port, and the drive control output port is connected with the drive module;
when the first short circuit signal or the second short circuit signal is effective, the control module enables the driving control output port to output a fault indication signal so as to enable the lighting loop to be fully lighted or flash; and if the detection signal continuously fluctuates when the second short circuit signal is effective, enabling the drive control output port to stop the illumination loop.
Preferably, the control module further comprises a prompt module, wherein the control module comprises a prompt signal output port, and the prompt signal output port is connected with the prompt module;
The control module enables the prompt signal output port to generate a prompt signal when the first short circuit signal is effective, or the second short circuit signal is effective, or the fault indication signal is effective, or the stop signal is effective, and the prompt module sends out a prompt when the prompt signal is effective.
Preferably, the detection module includes:
the light emitting loop of the first optical coupler device is connected in parallel with two ends of the first lamp bead group, one end of the light sensing loop of the first optical coupler device is grounded, and the other end of the light sensing loop of the first optical coupler device is connected with the control module;
one end of the first resistor is connected with an input voltage, and the other end of the first resistor is connected with the photosensitive loop of the first optocoupler device and one end of the control module.
Preferably, the first execution module includes:
and one end of a light-emitting loop of the second optical coupler is connected with the control module through a second resistor, the other end of the light-emitting loop of the second optical coupler is grounded, and the light sensitivity of the second optical coupler is connected with the two ends of the second lamp bead group in parallel.
Preferably, the second execution module includes:
and one end of a light-emitting loop of the third optical coupler is connected with the control module through a third resistor, the other end of the light-emitting loop of the third optical coupler is grounded, and a photosensitive loop of the third optical coupler is connected with two ends of the third lamp bead group in parallel.
Preferably, the driving module includes:
A rectifying circuit for converting an alternating voltage into a direct voltage;
A coupling circuit for coupling the DC voltage to the illumination loop;
a first switch connected between the coupling circuit and ground;
The driving chip is provided with an output end which is connected with the control end of the first switch through a resistor;
the second switch is connected between the control end of the first switch and the ground, and the control end of the second switch is connected with the drive control output port through a resistor.
Preferably, the prompting module includes:
The indicator lamp is connected in series between an input voltage and the ground;
The fourth resistor is connected in series between the indicator lamp and the input voltage;
a third switch is connected in series between the indicator lamp and the ground;
And the control end of the third switch is connected with the prompt signal output port through a resistor.
Preferably, in the lighting loop, a plurality of lamp beads are connected in series and then in parallel, and the lamp beads positioned at the same position on each parallel branch form the lamp bead group; or alternatively
In the lighting loop, a plurality of lamp beads are connected in parallel and then connected in series, and the lamp beads connected in parallel form the lamp bead group; or alternatively
In the lighting loop, a plurality of lamp bead groups are connected in parallel in pairs to form lamp bead units, the lamp bead units are connected in series and then connected in parallel, and the lamp bead units positioned at the same position on the parallel branch of each lamp bead unit form the lamp bead groups.
The technical scheme has the following advantages or beneficial effects:
According to the technical scheme, the voltage at two ends of the lamp bead group is collected to obtain detection signals, corresponding short-circuit signals are generated to short-circuit different lamp bead groups, the real-time voltage of the lamp bead group on the lighting loop is reduced, and then the real-time power of the lamp bead group is reduced, so that the lamp bead group can stop using a self-protection function, the lighting loop does not flicker any more, and the influence on human vision is avoided.
Drawings
FIG. 1 is a schematic view of the overall structure of a lighting device according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of the overall circuit of the lighting device according to the preferred embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a detection module according to a preferred embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a first execution module according to a preferred embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of a second execution module according to the preferred embodiment of the present invention;
Fig. 6 is a schematic circuit diagram of a prompt module according to a preferred embodiment of the invention.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples. The present invention is not limited to the embodiment, and other embodiments may fall within the scope of the present invention as long as they conform to the gist of the present invention.
In accordance with the above-mentioned problems of the prior art, the present invention provides a step-down flicker-free lighting device, as shown in fig. 1, comprising:
at least one lighting loop A1, wherein a plurality of lamp bead groups are connected in the lighting loop A1;
the detection module 1 is connected with two ends of a first lamp bead group S1 in the lamp bead groups and is used for outputting a detection signal according to the voltage of the two ends of the first lamp bead group S1;
The control module 2 is connected with the detection module 1, receives the detection signal, generates a first short-circuit signal if the detection signal fluctuates within a preset time period, and generates a second short-circuit signal if the detection signal continuously fluctuates when the first short-circuit signal is effective;
The first execution module 3 is connected with the control module 2 and short-circuits a second lamp bead group S2 in the lamp bead groups when the first short-circuit signal is effective;
And the second execution module 4 is connected with the control module 2 and short-circuits a third lamp bead group S3 in the lamp bead groups when the second short-circuit signal is effective.
Specifically, in this embodiment, the number of the bead groups may be three, which are the first bead group S1, the second bead group S2, and the third bead group S3, respectively.
Further, in the illumination loop A1, a plurality of beads are connected in series and then in parallel, and the beads positioned at the same position on each parallel branch form a bead group; or alternatively
In the lighting loop A1, a plurality of lamp beads are connected in parallel and then connected in series, and the lamp beads connected in parallel form a lamp bead group; or alternatively
In the lighting loop A1, a plurality of lamp bead groups are connected in parallel in pairs to form lamp bead units, the lamp bead units are connected in series and then connected in parallel, and the lamp bead units positioned at the same position on the parallel branch of each lamp bead unit form the lamp bead group.
In a preferred embodiment of the present invention, as shown in fig. 3, the detection module 1 includes:
the light-emitting loop of the first optical coupler device is connected in parallel with two ends of the first lamp bead group S1, one end of the light-sensing loop of the first optical coupler device is grounded, and the other end of the light-sensing loop of the first optical coupler device is connected with the control module 2;
One end of a first resistor R1 is connected with an input voltage VDD, and the other end of the first resistor R1 is connected with one end of a photosensitive loop of the first optocoupler device connected with the control module 2.
Specifically, in this embodiment, the light emitting loop of the first optocoupler may be the first light emitting diode D1, the light sensing loop of the first optocoupler may be the first phototransistor V1, the collector of the first phototransistor V1 is connected to a fifth resistor R5 and the control module 2, and the emitter of the first phototransistor V1 is grounded GND; the other end of the fifth resistor R5 is connected with a power supply VDD.
In this embodiment, the first bead set S1 includes one bead set for sampling, and the second bead set S2 includes two bead sets for adopting. After the lighting circuit A1 is powered up, the self-protection function of the lighting circuit A1 is triggered because the voltage input to the lighting circuit A1 exceeds the rated voltage. At this time, the output signal of the illumination circuit A1 is a pulse signal. The first optical coupler collects pulse signals on the lamp bead group and obtains detection signals through photoelectric conversion coupling, and the detection signals are pulse signals at the moment.
In a preferred embodiment of the present invention, as shown in fig. 4, the first execution module 3 includes:
And one end of a light-emitting loop of the second optocoupler is connected with the control module 2 through a second resistor R2, the other end of the light-emitting loop of the second optocoupler is grounded, and the light sensitivity of the second optocoupler is connected with two ends of the second lamp bead group S2 in parallel.
Specifically, in the embodiment, the light emitting loop of the second optocoupler may be the second light emitting diode D2, the light sensing loop of the second optocoupler may be the second phototransistor V2, and the second phototransistor V2 is connected in parallel to two ends of the second lamp bead set S2.
In this embodiment, the control module 2 may be a Microchip PIC12F series of single-chip microcomputer chips, and since the series of single-chip microcomputer chips have 8 pins, the chip microcomputer chips can be used as each input/output port of the control module 2 in the present technical solution, so as to implement centralized control on each part of modules.
The single chip sets the receiving period and the receiving times of the detection signal in advance. In a preferred embodiment, the reception period is two seconds and the number of times of reception is three. When the three detection signals received by the singlechip chip in two seconds fluctuate, a first short circuit signal is generated and sent to the first execution module 3. After receiving the first short-circuit signal, the first execution module 3 performs short-circuit on the second lamp bead group S2. In this embodiment, when the second lamp bead group S2 is shorted, the real-time voltage of the illumination circuit A1 is reduced, and the real-time current flowing in the illumination circuit A1 is constant, according to the formula: p=u×i, when the real-time voltage U decreases and the real-time current I does not change, the real-time power P of the illumination loop A1 decreases. When the real-time power of the lighting circuit A1 is lower than the rated power, the self-protection function of the lighting circuit A1 is not activated, so that the lamp bead group in the whole lighting circuit A1 is always on and does not flash.
In a preferred embodiment of the present invention, as shown in fig. 5, the second execution module 4 includes:
And one end of a light-emitting loop of the third optocoupler is connected with the control module 2 through a third resistor R3, the other end of the light-emitting loop of the third optocoupler is grounded, and a photosensitive loop of the third optocoupler is connected with two ends of the third lamp bead group S3 in parallel.
Specifically, in this embodiment, the light emitting loop of the second optocoupler may be a third light emitting diode D3, the light sensing loop of the third optocoupler may be a third phototransistor V3, the third light emitting diode D3 is connected to the control module 2 through a third resistor R3, and the third phototransistor V3 is connected in parallel to two ends of the third bead set S3.
After the first execution module 3 performs short circuit on the second lamp bead group S2 in the lighting circuit A1, if the singlechip chip can also receive three detection signals within two seconds to generate fluctuation, the real-time power of the lighting circuit A1 is higher than the rated power, and the real-time voltage on the lighting circuit A1 needs to be further reduced. Therefore, the singlechip chip generates a second short-circuit signal and sends the second short-circuit signal to the second execution module 4, so that the second execution module 4 short-circuits the third lamp bead group S3 in the lighting loop A1, further real-time voltage on the lighting loop A1 is realized, real-time power on the lighting loop A1 is lower than rated power, and further the self-protection function of the lighting loop A1 is not started, and the whole lighting loop A1 is ensured to be always on and not flicker.
In the preferred embodiment of the present invention, the control module 2 includes a driving control output port O4, and the driving control output port O4 is connected to the driving module 5;
when the first short-circuit signal or the second short-circuit signal is effective, the control module 2 makes the driving control output port O4 output a fault indication signal so as to make the lighting loop A1 fully light or flash; if the detection signal continuously fluctuates when the second short circuit signal is valid, the driving control output port O4 is enabled to stop the illumination loop A1.
In the preferred embodiment of the present invention, the driving module 5 is further included, and the driving module 5 is connected to the illumination circuit A1 for driving the illumination circuit A1 to operate.
In a preferred embodiment of the present invention, the driving module 5 includes:
A rectifying circuit for converting an alternating voltage into a direct voltage;
a coupling circuit for coupling the DC voltage to the illumination loop A1;
The first switch is connected between the coupling circuit and the ground;
the driving chip is provided with an output end which is connected with the control end of the first switch through a resistor;
The second switch is connected between the control end of the first switch and the ground, and the control end of the second switch is connected with the driving control output port O4 through a resistor.
Specifically, in the embodiment, after the second execution module 4 performs the short circuit on the third lamp bead group S3 in the lighting circuit A1, if the singlechip chip can also receive the second short circuit signal three times within two seconds, it indicates that the excessively high real-time power of the lighting circuit A1 is not the cause of the flicker of the lighting circuit A1, and at this time, the singlechip chip generates the stop signal and sends the stop signal to the second switch in the driving module 5. Preferably, as shown in fig. 2, the first switch may be an NMOS fet M1 connected between the coupling circuit and ground. The NMOS field-effect transistor M1 is a component responsible for the frequency duty ratio of the whole constant-current circuit, the second switch may be a first triode Q1 connected between the gate of the NMOS field-effect transistor M1 and ground, and when the detection signal continuously fluctuates when the second short-circuit signal is effective, the detected detection signal on the second lamp bead group S2 is a pulse signal, so the control module 2 outputs a stop signal through the driving control output port O4, so that the first triode Q1 is turned on, at this time, the NMOS field-effect transistor M1 stops outputting, and therefore, the coupling circuit does not output a direct-current voltage to the lighting circuit A1, at this time, each lighting circuit A1 stops emitting light, and potential safety hazards caused by overlarge voltage input to the lighting circuit A1 are avoided.
According to the technical scheme, the voltage at two ends of the lamp bead group is collected to obtain detection signals, corresponding short-circuit signals are generated to short-circuit different lamp bead groups, the real-time voltage on the lamp bead group is reduced, and then the real-time power on the lamp bead group is reduced, so that the lamp bead group can stop using a self-protection function, and therefore the lamp bead group does not flash any more, and the influence on human vision is avoided.
In the preferred embodiment of the present invention, the control module 2 further comprises a prompt module 6, wherein the control module 2 comprises a prompt signal output port 22, and the prompt signal output port 22 is connected with the prompt module 6;
The control module 2 makes the prompt signal output port 22 generate a prompt signal when the first short circuit signal is effective, or the second short circuit signal is effective, or the fault indication signal is effective, or the stop signal is effective, and the prompt module 6 sends out a prompt when the prompt signal is effective.
In a preferred embodiment of the present invention, as shown in fig. 6, the prompting module 6 includes:
an indicator lamp L1 connected in series between an input voltage VDD and ground;
A fourth resistor R4 connected in series between the indicator L1 and the input voltage VDD;
the third switch is connected in series between the indicator light L1 and the ground;
The control end of the third switch is connected with the prompt signal output port 22 through a resistor.
Specifically, in this embodiment, the third switch may be a second triode Q2, where an emitter of the second triode Q2 is grounded GND, a collector of the second triode Q2 is connected to a negative electrode of the indicator lamp L1, and a base of the second triode Q2 is connected to the prompt signal output port 22 of the control module 2 through a sixth resistor R6; the positive pole of pilot lamp L1 connects fourth resistance R4, and the input voltage VDD is connected to the other end of fourth resistance R4.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the embodiments and scope of the present invention, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations herein, which should be included in the scope of the present invention.
Claims (9)
1. A buck flicker-free lighting device, comprising:
at least one lighting loop, wherein a plurality of lamp bead groups are connected in the lighting loop;
The detection module is connected with two ends of a first lamp bead group in the lamp bead groups and is used for outputting a detection signal according to the voltage of the two ends of the first lamp bead group;
The control module is connected with the detection module, receives the detection signal, generates a first short-circuit signal if the detection signal fluctuates within a preset time period, and generates a second short-circuit signal if the detection signal continuously fluctuates when the first short-circuit signal is effective;
The first execution module is connected with the control module and short-circuits a second lamp bead group in the lamp bead groups when the first short-circuit signal is effective;
The second execution module is connected with the control module and short-circuits a third lamp bead group in the lamp bead groups when the second short-circuit signal is effective;
The control module comprises a drive control output port, the drive control output port is connected with a drive module, and the drive module is connected with the illumination loop and used for driving the illumination loop to work;
And if the detection signal continuously fluctuates when the second short circuit signal is effective, the driving control output port outputs a stop signal so as to stop the work of the illumination loop.
2. A lighting device as recited in claim 1, wherein,
And when the first short circuit signal or the second short circuit signal is effective, the control module enables the driving control output port to output a fault indication signal so as to enable the lighting loop to be fully lighted or flash.
3. The lighting device of claim 2, further comprising a reminder module, said control module comprising a reminder signal output port, said reminder signal output port being connected to said reminder module;
The control module enables the prompt signal output port to generate a prompt signal when the first short circuit signal is effective, or the second short circuit signal is effective, or the fault indication signal is effective, or the stop signal is effective, and the prompt module sends out a prompt when the prompt signal is effective.
4. A lighting device as recited in claim 1, wherein said detection module comprises:
the light emitting loop of the first optical coupler device is connected in parallel with two ends of the first lamp bead group, one end of the light sensing loop of the first optical coupler device is grounded, and the other end of the light sensing loop of the first optical coupler device is connected with the control module;
one end of the first resistor is connected with an input voltage, and the other end of the first resistor is connected with the photosensitive loop of the first optocoupler device and one end of the control module.
5. A lighting device as recited in claim 1, wherein said first execution module comprises:
and one end of a light-emitting loop of the second optical coupler is connected with the control module through a second resistor, the other end of the light-emitting loop of the second optical coupler is grounded, and the light sensitivity of the second optical coupler is connected with the two ends of the second lamp bead group in parallel.
6. A lighting device as recited in claim 1, wherein,
The second execution module includes:
and one end of a light-emitting loop of the third optical coupler is connected with the control module through a third resistor, the other end of the light-emitting loop of the third optical coupler is grounded, and a photosensitive loop of the third optical coupler is connected with two ends of the third lamp bead group in parallel.
7. A lighting device as recited in claim 2, wherein said drive module comprises:
A rectifying circuit for converting an alternating voltage into a direct voltage;
A coupling circuit for coupling the DC voltage to the illumination loop;
a first switch connected between the coupling circuit and ground;
The driving chip is provided with an output end which is connected with the control end of the first switch through a resistor;
the second switch is connected between the control end of the first switch and the ground, and the control end of the second switch is connected with the drive control output port through a resistor.
8. A lighting device as recited in claim 3, wherein said prompting module comprises:
The indicator lamp is connected in series between an input voltage and the ground;
The fourth resistor is connected in series between the indicator lamp and the input voltage;
a third switch is connected in series between the indicator lamp and the ground;
And the control end of the third switch is connected with the prompt signal output port through a resistor.
9. A lighting device as recited in claim 1, wherein in said lighting circuit, a plurality of light bulbs are connected in series and then in parallel, said light bulbs located at the same position on each parallel branch forming said group of light bulbs; or alternatively
In the lighting loop, a plurality of lamp beads are connected in parallel and then connected in series, and the lamp beads connected in parallel form the lamp bead group; or alternatively
In the lighting loop, a plurality of lamp bead groups are connected in parallel in pairs to form lamp bead units, the lamp bead units are connected in series and then connected in parallel, and the lamp bead units positioned at the same position on the parallel branch of each lamp bead unit form the lamp bead groups.
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| CN202110267512.4A CN113194585B (en) | 2021-03-11 | 2021-03-11 | Lighting device without flicker during voltage reduction |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101916550A (en) * | 2010-08-18 | 2010-12-15 | 福建捷联电子有限公司 | Light emitting diode driving circuit |
| CN102196639A (en) * | 2011-05-19 | 2011-09-21 | 佛山市顺德区嘉信灯饰有限公司 | Intelligent control circuit of solar LED lamp |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209250918U (en) * | 2018-09-30 | 2019-08-13 | 深圳亿思腾达集成股份有限公司 | A kind of LED controller output short-circuit detection protection circuit |
| CN210720682U (en) * | 2019-05-22 | 2020-06-09 | 南京艾飞特智能电子科技有限公司 | Lamp bead fault detection device on UV LED lamp plate |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916550A (en) * | 2010-08-18 | 2010-12-15 | 福建捷联电子有限公司 | Light emitting diode driving circuit |
| CN102196639A (en) * | 2011-05-19 | 2011-09-21 | 佛山市顺德区嘉信灯饰有限公司 | Intelligent control circuit of solar LED lamp |
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