CN212851114U - LED light projector lamp control system - Google Patents

LED light projector lamp control system Download PDF

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Publication number
CN212851114U
CN212851114U CN202021971849.0U CN202021971849U CN212851114U CN 212851114 U CN212851114 U CN 212851114U CN 202021971849 U CN202021971849 U CN 202021971849U CN 212851114 U CN212851114 U CN 212851114U
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triode
control circuit
resistor
output
microcontroller
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盛超
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Shenzhen Meihong Electronics Co ltd
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Shenzhen Meihong Electronics Co ltd
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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
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

The utility model relates to the technical field of LED control, and discloses an LED projection lamp control system with accurate electric quantity detection and higher safety, which comprises an overcharge detection protection circuit for controlling the charging of a storage battery; the overcharge detection protection circuit comprises a microcontroller, a first capacitor, a first triode and a field effect transistor, wherein the base electrode of the first triode is coupled with the output end of the microcontroller; the emitter of the first triode is connected with the other end of the first capacitor; the grid electrode of the field effect transistor is connected with the collector electrode of the first triode; the source electrode of the field effect transistor is connected with the emitting electrode of the first triode; the drain electrode of the field effect tube is connected with the output end of the solar cell panel; the microcontroller further outputs a level signal to control the on-off state of the first triode and the field effect transistor according to the change of the storage battery so as to charge the storage battery.

Description

LED light projector lamp control system
Technical Field
The utility model relates to a LED control technical field, more specifically say, relate to a LED projecting lamp control system.
Background
The projector is a lamp that specifies that the illuminance on the illuminated surface is higher than the surrounding environment, and is also called a spotlight. Generally, it can be aimed in any direction and has a structure that is not affected by climatic conditions, mainly for use in large-area workplace mines, building outlines, stadiums, parks, flower beds, etc. At present, the battery supplies the electric energy to the projecting lamp rather than the electricity is connected, lasts the power supply in-process at the battery to the LED projecting lamp, when the battery voltage drops to certain magnitude of voltage, current LED projecting lamp control system can't in time charge the battery according to the change of battery, leads to the battery to shorten its life-span because of putting excessively.
Therefore, how to improve the electric quantity detection and charging timeliness of the LED light projector control system to the storage battery becomes a technical problem that needs to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, can't in time charge the battery according to the change of battery to the above-mentioned LED projecting lamp control system of prior art, lead to the battery because of the defect that the overdischarge shortens its life-span, provide an accurate and higher LED of security light projector control system of electric quantity detection.
The utility model provides a technical scheme that its technical problem adopted is: constructing an LED projection lamp control system, which comprises an overcharge detection protection circuit used for controlling the charging of a storage battery;
the overcharge detection protection circuit comprises a microcontroller, a first capacitor, a first triode and a field effect transistor,
the power supply end of the microcontroller is connected with the output end of an external power supply;
the control end of the microcontroller is connected with one end of the first capacitor;
the base electrode of the first triode is coupled with the output end of the microcontroller;
the emitter of the first triode is connected with the other end of the first capacitor;
the grid electrode of the field effect transistor is connected with the collector electrode of the first triode;
the source electrode of the field effect transistor is connected with the emitting electrode of the first triode;
the drain electrode of the field effect tube is connected with the output end of the solar cell panel;
and the microcontroller controls the on-off states of the first triode and the field effect transistor according to the change of the storage battery and further outputs a level signal so as to charge the storage battery.
In some embodiments, the solar cell further comprises a first diode, wherein a cathode of the first diode is connected with an anode of the storage battery, and an anode of the first diode is connected with the output end of the solar cell panel.
In some embodiments, the circuit further comprises a first resistor, a second resistor and a third resistor connected in series,
one end of the first resistor is connected with the positive electrode of the storage battery,
one end of the third resistor is connected with one end of the first capacitor.
In some embodiments, the first transistor is an NPN transistor.
In some embodiments, the LED projection lamp further comprises a lamp-on detection and control circuit for controlling the working state of the LED projection lamp,
the lamp-on detection and control circuit comprises a voltage division circuit, a detection control circuit and an output control circuit,
the input end of the voltage division circuit is connected with the output end of the solar cell panel and is used for receiving and dividing the voltage signal input;
the input end of the detection control circuit is connected with the output end of the voltage division circuit;
and the input end of the output control circuit is connected with the output end of the detection control circuit and is used for receiving the level signal output by the detection control circuit.
In some embodiments, the power supply further comprises an over-discharge control circuit, an input terminal of the over-discharge control circuit is connected with an external power supply terminal, and an output terminal of the over-discharge control circuit is connected with an input terminal of the output control circuit.
LED light projector control system in, including being used for controlling the overcharge detection protection circuit that the battery charges, wherein, overcharge detection protection circuit includes microcontroller, first electric capacity, first triode and field effect transistor, and the drain electrode of field effect transistor is connected with solar cell panel's output, and microcontroller is according to the change of battery, and then the on-off state of the first triode of level signal control of output and field effect transistor to charge to the battery. Compared with the prior art, the threshold value set by the microcontroller is compared with the variable quantity of the storage battery, when the voltage value of the storage battery is higher than or lower than the preset value, the level signal output by the microcontroller controls the on-off state of the first triode and the field-effect tube so as to charge the storage battery, and the problem that the storage battery cannot be charged in time according to the change of the storage battery by the existing LED projection lamp control system is solved, so that the service life of the storage battery is shortened due to overdischarge of the storage battery.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is an overcharge detection protection circuit diagram of an embodiment of an LED projector control system;
fig. 2 is the utility model provides a light-on detection and control circuit diagram of embodiment of LED projecting lamp control system.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, in the first embodiment of the LED light projector control system of the present invention, the LED light projector control system includes an overcharge detection protection circuit 100 and a light-on detection and control circuit 200.
The overcharge detection protection circuit 100 is used to control the state of charge of the secondary battery, and is used to detect a voltage value of the secondary battery, and then compare the voltage value with a preset value (or threshold value) of the microcontroller U101 (belonging to the overcharge detection protection circuit 100).
For example, when the voltage value of the secondary battery is higher than 14.4V (corresponding to a high preset value), the charging is stopped; when the voltage value of the secondary battery is lower than 12.5V (corresponding to a low preset value), charging is started.
Specifically, the overcharge detection protection circuit 100 includes a microcontroller U101, a first capacitor C101, a first diode D101, a first transistor VT101, and a field effect transistor VT 102.
The microcontroller U101 is a core component of the overcharge detection protection circuit 100, and has functions of logic operation, electric quantity value, comparison command output, and pulse width modulation output.
The first transistor VT101 has the functions of switching and signal amplification.
Specifically, a power supply end (corresponding to 8 pins) of the microcontroller U101 is connected to an output end of an external power supply (corresponding to 9V) for receiving a driving voltage input by the external power supply (corresponding to 9V) in preparation for the operation thereof.
The control terminal (corresponding to pin 5) of the microcontroller U101 is connected to one terminal of the first capacitor C101.
The base of the first transistor VT101 is coupled to an output terminal (corresponding to pin 3) of the microcontroller U101, and is configured to receive a level signal (high level or low level) output by the microcontroller U101.
An emitter of the first transistor VT101 is connected to the other end of the first capacitor C101.
The grid electrode of the field effect transistor VT102 is connected with the collector electrode of the first triode VT101, the source electrode of the field effect transistor VT102 is connected with the emitter electrode of the first triode VT101, and the drain electrode of the field effect transistor VT102 is connected with the output end (corresponding to PVIN) of the solar panel.
The microcontroller U101 controls the on/off states of the first transistor VT101 and the field effect transistor VT102 according to the change of the storage battery and the output level signal, so as to charge the storage battery.
Specifically, the solar cell module board is input from pin 1 of the socket J1 and then added to the anode of the anti-reverse charging second diode D201, and the cathode of the second diode D201 is connected to the anode of the 12V battery, i.e., pin 3 of the J1.
The threshold (threshold) end (corresponding to 6 pins) of the microcontroller U101 is connected with the 12V power supply end through a first resistor R101.
The reset end (corresponding to 4 pins) and the power voltage end (corresponding to 8 pins) of the microcontroller U101 are respectively connected with the 9V power supply end.
The trigger terminal (corresponding to pin 2) of the microcontroller U101 is connected in series with the common terminal through a second resistor R102 and a third resistor R103.
The base electrode of the first triode VT101 is connected with the output end (corresponding to 3 pins) of the microcontroller U101 through a fifth resistor R105, and the collector electrode of the first triode VT101 is connected with the gate electrode of the field effect transistor VT102 through a seventh resistor R107.
The drain of the field effect transistor VT102 is connected to the anode of the second diode D201, and the source of the field effect transistor VT102 is coupled to the emitter of the first transistor VT 101.
Further, the cathode of the first diode D101 is connected to the anode of the battery (corresponding to 12V), and the anode of the first diode D101 is connected to the output terminal (corresponding to PVIN) of the solar cell panel.
In some embodiments, in order to improve the accuracy of the input voltage, a first resistor R101, a second resistor R102, and a third resistor R103 may be disposed in the circuit, wherein the first resistor R101, the second resistor R102, and the third resistor R103 are connected in series.
Specifically, one end of the first resistor R101 is connected to the positive electrode of the battery (corresponding to 12V), and one end of the third resistor R103 is connected to one end of the first capacitor C101.
The working principle is as follows: when the microcontroller U101 is initially powered on, the pin 2 of the microcontroller U101 is at a low level due to the action of the first capacitor C101, the pin 3 outputs a high level, and the first triode VT101 is conducted; the field effect transistor VT102 is turned off, allowing the solar cell to charge the battery (corresponding to 12V).
When the voltage charged by the storage battery is less than 14.4V, the voltage of the pin 2 and the pin 6 sent to the microcontroller U101 by the series voltage division circuit consisting of the first resistor R101, the second resistor R102 and the third resistor R103 is lower than the power supply voltage of the microcontroller U101 of 2/3, namely less than 6V, and the circuit maintains the charging state.
Along with the extension of the charging time, the voltage of the storage battery gradually rises, when the voltages of the pin 2 and the pin 6 of the microcontroller U101 are higher than the power supply voltage of the microcontroller U101 of 2/3, the pin 3 of the microcontroller U101 outputs a low level, so that the first triode VT101 is cut off, the field effect transistor VT102 is switched on, the current is discharged to the solar panel, and the storage battery is stopped being charged.
When the pin 3 of the microcontroller U101 outputs a low level, the pin 7 is turned on, which is equivalent to incorporating the fourth resistor R104 into the circuit, and the voltage division ratio of the circuit at this time is: when the voltage of the storage battery is lower than the set value of 12.5, the circuit state is inverted again, so that the pin 3 of the microcontroller U101 outputs a high level, and the storage battery is allowed to be charged.
Use this technical scheme, the threshold value that sets up through microcontroller U101 compares with the variable quantity of battery, and when the magnitude of voltage of battery was higher than or was less than the default, the level signal of microcontroller U101 output was to the on-off state of controlling first triode VT101 and field effect transistor VT102 to charge the battery, in order to solve current LED projecting lamp control system can't in time charge the battery according to the change of battery, lead to the battery to shorten its life-span because of putting excessively.
As shown in fig. 2, the light-on detection and control circuit 200 is used for outputting a level signal (high level or low level) for controlling the working state of the LED projector.
Specifically, the light-on detection and control circuit 200 includes a voltage dividing circuit 201, a detection control circuit 202, an overdischarge control circuit 203, and an output control circuit 204.
The voltage dividing circuit 201 is configured to divide an input voltage signal.
The input end of the voltage dividing circuit 201 is connected to an output end of the Solar panel (corresponding to PVIN-Solar), and is configured to receive a voltage signal output by the Solar panel (corresponding to Solar) according to the illumination brightness of the sun, divide the voltage of the input voltage signal, and output the divided voltage signal to the detection control circuit 202.
The detection control circuit 202 may output a high level or a low level signal according to the magnitude of the input voltage/current signal.
An input end of the detection control circuit 202 is connected to an output end of the voltage dividing circuit 201, and is configured to receive the voltage signal subjected to voltage dividing processing, and the detection control circuit 202 outputs a level signal according to the input voltage signal and then outputs the level signal to the output control circuit 204.
The output control circuit 204 can control the working state of the LED projector according to the input level signal.
An input terminal of the output control circuit 204 is coupled to the output terminal of the detection control circuit 202, and is used for receiving the level signal.
When the level signal output by the detection control circuit 202 is a low level, the low level is used for turning off the output control circuit 204 to turn off the LED projection lamp;
when the level signal output by the detection control circuit 202 is a high level, the high level is used for triggering the output control circuit 204 to work so as to control the LED projector to be turned on.
Specifically, the input voltage of the Solar cell panel (corresponding to PVIN-Solar) is divided by the voltage divider 201, and then is applied to the inverting terminal (belonging to the detection control circuit 202) of the first operational amplifier a201, and the in-phase terminal of the first operational amplifier a201 is connected to the voltage dividing point of the fourteenth resistor R204, the fifteenth resistor R205 and the second adjustable resistor RT 201.
In daytime, the output voltage of a Solar cell panel (corresponding to PVIN-Solar) under the irradiation of sunlight is very high, voltage signals are divided by a twelfth resistor R202 and a thirteenth resistor R203 (belonging to a voltage division circuit 201) to enable the voltage of the inverting end of a first operational amplifier A201 to be higher than the voltage of the non-inverting end, the output end of the first operational amplifier A201 outputs a low level, at the moment, a second triode VT201 (belonging to a detection control circuit 202) is cut off, the output control circuit 204 does not work without power supply voltage, a sixth triode VT205 is cut off, a relay JQ is not attracted, the control system does not have output voltage, and the LED project lamp does not work.
With the gradual black of the sky, the output voltage of the Solar cell panel (corresponding to PVIN-Solar) is reduced, the voltage of the inverting terminal (corresponding to 3 pins) of the first operational amplifier A201 is also reduced synchronously, when the voltage of the inverting terminal (corresponding to 3 pins) of the first operational amplifier A201 is lower than that of the inverting terminal, the first operational amplifier A201 is overturned, the output end of the first operational amplifier A201 outputs a high level, at the moment, the second triode VT201 is conducted, the output control circuit 204 is electrified to work, the sixth triode VT205 is conducted, and the relay JQ is attracted to light the street lamp.
By using the technical scheme, the detection control circuit 202 can output the level signal for controlling the working state of the output control circuit 102 according to the illumination change, so as to solve the problem that the existing street lamp control system cannot control the on or off of the LED projection lamp in time according to the gradual change of the ambient brightness, so that the storage battery still continuously discharges for the LED projection lamp in the daytime, and the electric energy is wasted.
In some embodiments, in order to improve the accuracy of the output level signal, a first operational amplifier a201 and a second transistor VT201 may be disposed in the detection control circuit 202.
The first operational amplifier a201 includes an electronic integrated circuit including a multi-stage amplifier circuit, and the input stage of the electronic integrated circuit is a differential amplifier circuit, which has high input resistance and zero drift suppression capability.
The second transistor VT201 has a switching function, and is an NPN transistor.
Specifically, the inverting terminal (corresponding to the 3 pins) of the first operational amplifier a201 is connected to the output terminal of the voltage divider circuit 201, which is used for receiving the voltage signal.
The non-inverting terminal (corresponding to 2 pins) of the first operational amplifier a201 is connected with the collector of the second triode VT201, and the base of the second triode VT201 is connected with the output terminal (corresponding to 4 pins) of the first operational amplifier a 201.
The emitter of the second transistor VT201 is connected to a signal input terminal of the output control circuit 204.
That is, when the level signal output by the first operational amplifier a201 is a high level, the second transistor VT201 is triggered and turned on, and outputs a control signal to the output control circuit 204 to control the LED projector to work;
when the level signal output by the first operational amplifier a201 is a low level, the second transistor VT201 is turned from on to off, and stops outputting the control signal to the output control circuit 204 to turn off the LED projector.
In some embodiments, in order to improve flexibility of setting the street lamp lighting time, a fourteenth resistor R204, a fifteenth resistor R205, a sixteenth resistor R206 and a second adjustable resistor RT201 may be provided in the detection control circuit 202, wherein the second adjustable resistor RT201 is configured to set an adjustment potentiometer for the street lamp lighting time, and the adjustment of the second adjustable resistor RT201 may be configured to light the street lamp at different times.
Sixteenth resistor R206 the sixteenth resistor R206 is a feedback resistor, and functions to make the first operational amplifier a201 a hysteresis comparator, so as to prevent and avoid the first operational amplifier a201 from oscillating around the lamp-on point to repeatedly turn on and off the lamp.
Specifically, the fourteenth resistor R204, the fifteenth resistor R205 and the second adjustable resistor RT201 are connected in series.
One end of the fourteenth resistor R204 is connected to the non-inverting terminal (corresponding to pin 2) of the first operational amplifier a201 and one end of the fifteenth resistor R205, respectively, and the other end of the fourteenth resistor R204 is connected to the collector of the second transistor VT 201.
The other end of the fifteenth resistor R205 is connected to one end of the second adjustable resistor RT201, and the other end of the second adjustable resistor RT201 is connected to the output end (corresponding to 4 pins) of the first operational amplifier a 201.
The output end of the first operational amplifier a201 is connected to the base of the second transistor VT201 through a sixteenth resistor R206 and a sixteenth resistor R206.
An adjusting end of the second adjustable resistor RT201 is connected to an anode of the second diode D201 and one end of the second capacitor C201, respectively, and a cathode of the second diode D201 and the other end of the second capacitor C201 are connected to an inverting end (corresponding to 2 pins) of the first operational amplifier a201, respectively.
It should be noted that the second diode D201 is a clamping diode, and is used to prevent the damage caused by the excessively high voltage received by the solar panel during the day, which causes the excessively high input voltage at the inverting terminal (corresponding to pin 3) of the first operational amplifier a 201.
The second capacitor C201 is an energy storage capacitor, and is used for preventing the instantaneous sudden change of the voltage at the inverting terminal (corresponding to 3 pins) of the first operational amplifier a201 from mistakenly lighting the LED projection lamp.
In some embodiments, in order to facilitate setting the working period of the LED projector, a timing controller U201, which employs a programmable timing control chip and has a low power consumption and a built-in programmable frequency divider circuit, may be disposed in the output control circuit 204.
Specifically, a signal input end (corresponding to pins 12 and 13) of the timing controller U201 is connected to an emitter of the first transistor VT101, and a signal output end (corresponding to pin 8) of the timing controller U201 is connected to a positive terminal of the LED projector.
Specifically, the timing controller U201 designs the adjustment ranges of the timing light-on and timing light-off times as follows: 2.093 hours to 11.93 hours, and the adjustment is controlled by a third adjustable resistor RT202 and a fourth adjustable resistor RT203 respectively.
In some embodiments, in order to improve the stability of the input voltage signal, a twelfth resistor R202 and a thirteenth resistor R203 may be disposed in the voltage divider circuit 201, wherein the twelfth resistor R202 and the thirteenth resistor R203 are connected in series.
Specifically, one end of the twelfth resistor R202 is coupled to an output end of the Solar cell panel (corresponding to PVIN-Solar), the other end of the twelfth resistor R202 is connected to one end of the thirteenth resistor R203 and the inverting terminal (corresponding to pin 3) of the first operational amplifier a201, and the other end of the thirteenth resistor R203 is connected to the common terminal.
That is, the voltage/current signal inputted from the Solar cell panel (corresponding to PVIN-Solar) is divided by the twelfth resistor R202 and the thirteenth resistor R203, and then inputted to the first operational amplifier a 201.
In some embodiments, in order to improve the safety of the operation of the battery, an overdischarge control circuit 203 for battery overdischarge detection, i.e. when the battery voltage is lower than 10.8V, the battery stops outputting the voltage, may be provided in the control system.
The over-discharge control circuit 203 includes a second operational amplifier a202 and a third transistor VT 202.
The third transistor VT202 is an NPN transistor, which has a switching function.
Specifically, the non-inverting terminal (corresponding to the 5-pin) of the second operational amplifier a202 is connected to the 9V power supply terminal through a twentieth resistor R210, and the inverting terminal (corresponding to the 6-pin) of the second operational amplifier a202 is connected to the 12V power supply terminal through a seventeenth resistor R207, and an eighteenth resistor R208, which are connected in series.
The output end (corresponding to pin 7) of the second operational amplifier a202 is connected to the base of the third transistor VT202 through the thirteenth resistor R113, and the collector of the third transistor VT202 is connected to the base of the second transistor VT 201.
When the LED projector is about to be turned on or turned on, and the voltage of the storage battery is lower than the allowable discharge termination value (i.e. 10.8V), the third transistor VT202 is turned on, and at this time, the second transistor VT201 is turned off no matter whether the first operational amplifier a201 outputs a high level, so as to protect the storage battery from being damaged by over-discharge.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims (6)

1. The control system of the LED project lamp is characterized by comprising an overcharge detection protection circuit used for controlling the charging of a storage battery;
the overcharge detection protection circuit comprises a microcontroller, a first capacitor, a first triode and a field effect transistor,
the power supply end of the microcontroller is connected with the output end of an external power supply;
the control end of the microcontroller is connected with one end of the first capacitor;
the base electrode of the first triode is coupled with the output end of the microcontroller;
the emitter of the first triode is connected with the other end of the first capacitor;
the grid electrode of the field effect transistor is connected with the collector electrode of the first triode;
the source electrode of the field effect transistor is connected with the emitting electrode of the first triode;
the drain electrode of the field effect tube is connected with the output end of the solar cell panel;
and the microcontroller controls the on-off states of the first triode and the field effect transistor according to the change of the storage battery and further outputs a level signal so as to charge the storage battery.
2. The LED floodlight control system according to claim 1,
the solar battery further comprises a first diode, wherein the cathode of the first diode is connected with the anode of the storage battery, and the anode of the first diode is connected with the output end of the solar battery panel.
3. The LED projector control system as claimed in claim 1 or 2,
also comprises a first resistor, a second resistor and a third resistor which are connected in series,
one end of the first resistor is connected with the positive electrode of the storage battery,
one end of the third resistor is connected with one end of the first capacitor.
4. The LED floodlight control system according to claim 1,
the first triode is an NPN type triode.
5. The LED floodlight control system according to claim 1,
also comprises a lamp-on detection and control circuit for controlling the working state of the LED projection lamp,
the lamp-on detection and control circuit comprises a voltage division circuit, a detection control circuit and an output control circuit,
the input end of the voltage division circuit is connected with the output end of the solar cell panel and is used for receiving and dividing the voltage signal input;
the input end of the detection control circuit is connected with the output end of the voltage division circuit;
and the input end of the output control circuit is connected with the output end of the detection control circuit and is used for receiving the level signal output by the detection control circuit.
6. The LED floodlight control system according to claim 5,
the power supply circuit also comprises an over-discharge control circuit, wherein the input end of the over-discharge control circuit is connected with an external power supply end, and the output end of the over-discharge control circuit is connected with the input end of the output control circuit.
CN202021971849.0U 2020-09-10 2020-09-10 LED light projector lamp control system Active CN212851114U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021971849.0U CN212851114U (en) 2020-09-10 2020-09-10 LED light projector lamp control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021971849.0U CN212851114U (en) 2020-09-10 2020-09-10 LED light projector lamp control system

Publications (1)

Publication Number Publication Date
CN212851114U true CN212851114U (en) 2021-03-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021971849.0U Active CN212851114U (en) 2020-09-10 2020-09-10 LED light projector lamp control system

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