CN209526919U - Three-color LED atmosphere lamp control circuit - Google Patents
Three-color LED atmosphere lamp control circuit Download PDFInfo
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- CN209526919U CN209526919U CN201821913575.2U CN201821913575U CN209526919U CN 209526919 U CN209526919 U CN 209526919U CN 201821913575 U CN201821913575 U CN 201821913575U CN 209526919 U CN209526919 U CN 209526919U
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Abstract
A kind of three-color LED atmosphere lamp control circuit, including power circuit, main control circuit, intermediate circuit and atmosphere lamp drive circuit.Power circuit is connect with intermediate circuit and atmosphere lamp drive circuit respectively；Intermediate circuit is connect with main control circuit and body of a motor car bus respectively；Main control circuit includes single-chip microcontroller.Wherein, atmosphere lamp drive circuit includes three paths of LEDs branches, and each paths of LEDs branch includes current-limiting circuit, LED light string, constant-current circuit and switching circuit.One end of current-limiting circuit is connect with power circuit, and the anode of the other end and LED light string connects.One end of constant-current circuit and the cathode of LED light string connect, and the other end is connected to switching circuit.Switching circuit includes switching tube, and the control terminal of the switching tube of three paths of LEDs branches is connected to the first, second, and third pwm signal output end of single-chip microcontroller；The LED light string of three paths of LEDs branches is respectively red, green, blue LED light string.The utility model structure is simple, and versatility is good, and manufacturing cost is low.
Description
Technical field
The utility model relates to automotive lighting technology more particularly to atmosphere lamp control circuits.
Background technique
With the continuous development of automobile industry, requirement of the people to car light is higher and higher.Automobile lamp is not only function
Part and appearance/decoration have become vehicle configuration and the vital a part of whole outer.In recent years, atmosphere lamp
As a kind of novel lamp kind in the car using increasing, automotive interior is mostly installed at, for adjusting atmosphere simultaneously
Certain illuminating effect is provided.Existing atmosphere circuit for lamp mainly includes power circuit, main control circuit, intermediate circuit and atmosphere
Lamp drive circuit.First output end of power circuit is connect with intermediate circuit, and the second output terminal and atmosphere lamp of power circuit are driven
Dynamic circuit connection, is used for intermediate circuit and atmosphere lamp drive circuitry.Intermediate circuit respectively with main control circuit and vapour
The connection of vehicle Vehicle Body Bus, intermediate circuit are used to for the output voltage of power circuit being converted into defeated after the operating voltage of main control circuit
Out to main control circuit, the atmosphere lamp control instruction from body of a motor car bus is transmitted to main control circuit by intermediate circuit.In
Between circuit be usually made of system integrated chip.Main control circuit controls atmosphere according to the atmosphere lamp control instruction received
The work of lamp drive circuit.
Three color atmosphere lamps (as carried out colour mixture or other different colours using the lamp of three kinds of colors of red, green, blue) can provide
Enough color changes, the luminous intensity and mutual ratio (such as PWM light modulation) of the lamp bead by changing three kinds of colors, so as to
The color and brightness that adjustment atmosphere lamp is finally shown, meet people and want the requirement for reaching different-effect in varied situations,
Therefore just gradually become mainstream configuration.LED(light emitting diode) lamp due to it is low with operating voltage, efficiency is high, strong applicability,
The advantages that service life is long, the response time is short, environmental pollution is small, various colors is increasingly used in three color atmosphere lamps.
By the characteristic of LED it is found that with forward current increase, LED light flux increases with it, i.e. brightness increases, for
This may cause the brightness ratio variation of three kinds of color LED to three color atmosphere lamps, what the final colour mixture known to colour mixture principle was formed
Color can change, and show deviation occur so as to cause the color of atmosphere lamp.In addition, electric current influences very big, mistake to LED junction temperature
Big electric current easilys lead to LED lamp bead junction temperature and increases and damage.When the junction temperature of LED rises, forward voltage VF can be therewith
Reduce, if LED operation is under constant-pressure conditions, this, which will lead to, flows through the forward current increase of LED and be further exacerbated by temperature-rise effect
Vicious circle is formed, device is finally damaged.In addition, the maximum luminous efficiency of light emitting diode reduces, wave with the increase of junction temperature
Length is gradually changed to long wavelength, i.e., the chromaticity coordinates and luminous flux of single LED change, this will lead to the face of final atmosphere lamp
Color, which is shown, there is deviation.Therefore the chromaticity coordinates of LED, brightness, junction temperature Opposed Current, temperature sensitive characteristic are also to three-color LED atmosphere
The control driving for enclosing lamp proposes harsh requirement.
In the prior art, it to three-color LED atmosphere lamp, generallys use expensive special chip and constant current driving is provided, adopt
The junction temperature of LED is detected with temperature sensor (such as thermistor) and feeds back to controller, junction temperature-strong light according to known to LED
Degree/chromaticity coordinates curve is modified the duty ratio of the LED of corresponding color.When detecting excess temperature, controller can control each LED
Duty ratio, reduce its duty ratio to controlling its temperature rise.The prior art has the following disadvantages: 1, special chip cost
High, poor universality；2, due to sensor it is actually detected be temperature near LED lamp bead, controller is according to preset biography
Sensor temperature-junction temperature model reckoning LED junction temperature, and the LED lamp bead when arrangement difference of the LED lamp bead of different atmosphere lamps, assembly
Will lead to the junction temperature accuracy that the model is extrapolated with sensor position error, use environment difference reduces, thus to junction temperature
Detection be unable to reach high-precision requirement, to be difficult to reach predetermined when correcting influence of the junction temperature to atmosphere lamp display color
Precision；Furthermore it also occur that virtual junction temperature has been more than limit value but the situation still normal according to the junction temperature value of model reckoning, lead to device
Part damage；3, single LED lamp bead can only be detected using thermistor, multiple temperature-sensitive electricity is needed if being detected to more lamp beads
Resistance, further increases device cost, power consumption and the heat of generation, exacerbates the temperature rise of LED lamp bead.
Summary of the invention
That the technical problem to be solved by the utility model is to provide a kind of structures is simple, versatility is good, manufacturing cost is low
Three-color LED atmosphere lamp control circuit.
Further technical problem to be solved in the utility model is that providing one kind is realized with lower cost to LED
The three-color LED atmosphere lamp control circuit that junction temperature is accurately detected.
According to the three-color LED atmosphere lamp control circuit of the utility model embodiment, including power circuit, main control circuit,
Intermediate circuit and atmosphere lamp drive circuit；First output end of power circuit is connect with intermediate circuit, and the second of power circuit is defeated
Outlet is connect with atmosphere lamp drive circuit；Intermediate circuit is connect with main control circuit and body of a motor car bus respectively, intermediate electricity
Output is to main control circuit, intermediate electricity after road is used to for the output voltage of power circuit being converted into the operating voltage of main control circuit
Atmosphere lamp control instruction from body of a motor car bus is transmitted to main control circuit by road；Main control circuit includes single-chip microcontroller, institute
Single-chip microcontroller is stated for controlling the work of atmosphere lamp drive circuit according to the atmosphere lamp control instruction that receives；Wherein, atmosphere lamp drives
Dynamic circuit includes three paths of LEDs branches, and each paths of LEDs branch includes current-limiting circuit, LED light string, constant-current circuit and switching circuit；Limit
One end of current circuit and the second output terminal of power circuit connect, and the other end of current-limiting circuit and the anode of LED light string connect；It is permanent
Current circuit includes PNP triode, the first NPN triode, the first voltage-stabiliser tube, the second voltage-stabiliser tube, first resistor and second resistance；The
The cathode of one voltage-stabiliser tube and one end of first resistor are all connected to the cathode of LED light string, the other end of first resistor and tri- pole PNP
The emitter of pipe connects；Collector of the base stage of PNP triode respectively with the anode of the first voltage-stabiliser tube and the first NPN triode connects
It connects, the collector of PNP triode is connect with the base stage of the cathode of the second voltage-stabiliser tube and the first NPN triode respectively；First NPN tri-
The emitter of pole pipe and one end of second resistance connect；Switching circuit includes switching tube, the first conduction terminal of switching tube respectively with
The anode connection of the other end of second resistance and the second voltage-stabiliser tube, the second conduction terminal ground connection of switching tube；Three paths of LEDs branches are opened
The control terminal for closing pipe is connected to the first pwm signal output end, the second pwm signal output end and the 3rd the PWM letter of single-chip microcontroller
Number output end；The LED light string of three paths of LEDs branches is respectively red LED lamp string, green LED lamp string and blue led lamp string.
Above-mentioned three-color LED atmosphere lamp control circuit, wherein the first voltage signal measurement end of single-chip microcontroller respectively with red
The anode connection of the anode of LED light string, the anode of green LED lamp string and blue led lamp string, the second voltage signal of single-chip microcontroller are surveyed
Amount end is connect with the cathode of the cathode of red LED lamp string, the cathode of green LED lamp string and blue led lamp string respectively.
Above-mentioned three-color LED atmosphere lamp control circuit, wherein current-limiting circuit is by multiple current-limiting resistance groups parallel with one another
At.
The utility model at least has the following advantages:
1, one or series connection plurality of LEDs lamp bead can be set as needed in every paths of LEDs branch independent control, every paths of LEDs branch,
It only needs to be adjusted the voltage and/or current-limiting circuit that input to LED branch without changing remaining circuit design, circuit is general
Property is strong；
2, every paths of LEDs branch is provided with independent constant-current control circuit, and circuit structure is simple and constant current effect is good, avoids electricity
Stream fluctuation damage device and the influence to display effect, due to not providing constant current using the dedicated custom chip of higher cost
Source can need to select suitable single-chip microcontroller without custom chip again according to function, reduce costs, improve the logical of circuit
The property used；
3, measuring junction temperature by way of measuring the forward voltage of LED light string, measurement result is (such as compared to other measurement methods
Temperature sensor) it is more accurate, and three paths of LEDs branches all can measure, so as to more accurately correct temperature to the brightness of LED and
The influence of chromaticity coordinates；Due to no setting is required temperature sensor (usually thermistor), circuit power consumption and device are also reduced
Cost.In addition, by controlling the PWM of single-chip microcontroller in conjunction with forward voltage measurement, it is not necessary that list is respectively set for every paths of LEDs branch
Only measurement port realizes the junction temperature inspection to three paths of LEDs circuits in the case where not occupying the port of more multiple single chip microcomputer additionally
It surveys；
4, it integrally generates heat circuit and radiating efficiency controls, reduce limit by the way that the current-limiting resistance of multiple parallel connections is arranged
The fever of leakage resistance influences, improves the safety in utilization of radiating efficiency and circuit.
Detailed description of the invention
Fig. 1 shows the circuit diagram of the three-color LED atmosphere lamp control circuit according to utility model embodiment.
Fig. 2 shows the circuit diagrams according to the atmosphere lamp drive circuit of utility model embodiment.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
Fig. 1 shows the circuit diagram of the three-color LED atmosphere lamp control circuit according to utility model embodiment.Such as Fig. 1
Shown, which includes power circuit 1, main control circuit 2, intermediate circuit 3 and atmosphere lamp drive circuit
4。
First output end of power circuit 1 is connect with intermediate circuit 3, and the second output terminal and atmosphere lamp of power circuit 1 are driven
Dynamic circuit 4 connects, for powering to intermediate circuit 3 and atmosphere lamp drive circuit 4.Further, power circuit 1 includes direct current
Source 11 and power protecting circuit 12.DC power supply 11 is connect with the input terminal of power protecting circuit 12, power protecting circuit 12
First output end and second output terminal are connect with intermediate circuit 3 and atmosphere lamp drive circuit 4 respectively.
Intermediate circuit 3 connects with main control circuit 2 and body of a motor car bus (such as CAN bus or LIN bus) respectively
It connects, intermediate circuit 3 is for output after the output voltage of power circuit 1 to be converted into the operating voltage of main control circuit 2 to master control
Circuit 2 processed, to power to main control circuit 2, and intermediate circuit 3 turns the atmosphere lamp control instruction from body of a motor car bus
Main control circuit 2 is issued, above-mentioned atmosphere lamp control instruction can be transmitted by car body controller (BCM) by body of a motor car bus.
Main control circuit 2 is used for the work according to the atmosphere lamp control instruction control atmosphere lamp drive circuit 4 received.It is main
Control circuit 2 includes single-chip microcontroller 21 and SCM peripheral circuit (not shown).Single-chip microcontroller 21 is used for according to the atmosphere lamp received
The work of control instruction control atmosphere lamp drive circuit；For example, when atmosphere lamp control instruction is lighting instruction, then single-chip microcontroller 21
Relevant control signal can be exported to atmosphere lamp drive circuit 4, drive atmosphere lamp to light by atmosphere lamp drive circuit 4.
Fig. 2 shows the circuit diagrams according to the atmosphere lamp drive circuit of utility model one embodiment.In Fig. 2, Vin is power supply
Output voltage of the circuit 1 to atmosphere lamp drive circuit 4, the i.e. 12V DC voltage of automobile storage battery output in the present embodiment, if
LED serial number is more, can also increase voltage conversion circuit between power circuit 1 and atmosphere lamp drive circuit 4 to improve
Vin。
Atmosphere lamp drive circuit 4 includes three paths of LEDs branches 41, and each paths of LEDs branch includes current-limiting circuit 411, LED light
String 412, constant-current circuit 413 and switching circuit 414.Wherein, the LED light string of three paths of LEDs branches be respectively red LED lamp string, it is green
Color LED light string and blue led lamp string.Each LED light string is by a LED lamp bead or the identical LED light of multiple series aiding connections, color
Pearl composition.Since the structure of three paths of LEDs branches is essentially identical, for simplicity, next, only to be provided with red LED lamp string
LED branch for illustrate the structure and working principle of LED branch.
One end of current-limiting circuit 411 is connect with the second output terminal of power circuit 1, the other end and LED of current-limiting circuit 411
The anode connection of lamp string 412；Current-limiting circuit 411 is used to limit the size for the electric current for flowing through LED light string 412.In the present embodiment,
Current-limiting circuit 411 is made of multiple current-limiting resistance R11, R12 and R13 parallel with one another.Stream is reduced by multiple resistor coupled in parallel
The electric current of single resistance is crossed, to reduce the fever of single current-limiting resistance and improve radiating efficiency, reduces current-limiting resistance
The influence generated heat to LED.
Constant-current circuit 413 includes PNP triode Q11, the first NPN triode Q1 2, the first voltage-stabiliser tube Z11, the second voltage-stabiliser tube
Z12, first resistor R14 and second resistance R15.The cathode of first voltage-stabiliser tube Z11 and one end of first resistor R14 are all connected to
The other end of the cathode of LED light string 412, first resistor R14 is connect with the emitter of PNP triode Q11；PNP triode Q11's
Base stage is connect with the collector of the anode of the first voltage-stabiliser tube Z11 and the first NPN triode Q1 2 respectively, the collection of PNP triode Q11
Electrode is connect with the base stage of the cathode of the second voltage-stabiliser tube Z12 and the first NPN triode Q1 2 respectively；First NPN triode Q1 2
Emitter is connect with one end of second resistance R15.PNP triode Q11, the first voltage-stabiliser tube Z11 and first resistor R14 constitute one
Constant-current source provides stable operating current to the second voltage-stabiliser tube Z12, and the first NPN triode Q1 2, the second voltage-stabiliser tube Z12 and
Two resistance R15 constitute another constant-current source, provide stable operating current to the first voltage-stabiliser tube Z11.Since two constant-current sources are mutual
The voltage-stabiliser tube operating point for mutually stablizing other side becomes the burning voltage on voltage-stabiliser tube no longer with the total current for flowing through continuous current
Change, thus can guarantee to flow through LED light string operating current it is constant.
Switching circuit 414 includes switching tube, the first conduction terminal of switching tube respectively with the other end of second resistance R15 and the
The anode connection of two voltage-stabiliser tube Z12, the second conduction terminal ground connection of switching tube.This is equipped with the switch of the LED branch of red LED lamp string
The control terminal of pipe is connect with the first pwm signal output end of single-chip microcontroller 21.The switching tube of LED branch equipped with green LED lamp string
Control terminal then connect with the second pwm signal output end of single-chip microcontroller 21, the switching tube of the LED branch equipped with blue led lamp string
Control terminal connect with the third pwm signal output end of single-chip microcontroller 21.
In the present embodiment, the switching tube of the LED branch equipped with red LED lamp string be the second NPN triode Q1 3, second
The base stage of NPN triode Q1 3, collector and emitter respectively constitute the control terminal of switching tube, the first conduction terminal and the second conducting
End.Switching circuit 414 further includes 3rd resistor R16 and the 4th resistance R17.The of one end of 3rd resistor R16 and single-chip microcontroller 21
One pwm signal output end connection, the other end of 3rd resistor R16 respectively with the base stage and the 4th resistance of the second NPN triode Q1 3
One end of R17 connects, and the other end of the 4th resistance R17 is connect with the emitter of the second NPN triode Q1 3.Second NPN triode
Q13 receives the pwm control signal that single-chip microcontroller 21 exports, and adjusts the light emission luminance of LED light string by adjusting PWM duty cycle.
4th resistance R17 may insure that the second NPN triode Q1 3 also ensures that in an off state when input signal removes, and ensure that
The safety and stability of circuit.
In the present embodiment, the first voltage signal measurement end V1 of single-chip microcontroller 21 is positive, green with red LED lamp string respectively
Color LED light string anode and blue led lamp string anode connection, the second voltage signal measurement end V2 of single-chip microcontroller 21 respectively with it is red
The cathode of color LED light string, the cathode of green LED lamp string are connected with the cathode of blue led lamp string, and this connection type facilitates reality
Now measuring junction temperature by way of measuring the forward voltage of LED light string.
According to the working principle of the three-color LED atmosphere lamp control circuit of the utility model embodiment and process approximately as.
Single-chip microcontroller 21 (such as opens/closes, color adaptation, brightness regulation after the control signal for receiving three color atmosphere lamps
Deng), three road pwm control signals are exported to the switching tube of each LED branch.By the duty for adjusting the pwm signal of three LED branches
The size of ratio and mutual ratio then may be implemented required color and show and corresponding brightness.
When measuring the junction temperature of LED light string, single-chip microcontroller 21 is by control pwm signal, so that (should at the time of a certain of short duration
Time is very short, and human eye will not be discovered), only a paths of LEDs branch is connected, and another two paths of LED branch shutdown, the port V1 and V2 measures at this time
The voltage arrived the i.e. voltage at the branch LED light string both ends passes through so as to calculate the forward voltage in the paths of LEDs lamp string
Inquire voltage-junction temperature temperature relation table of pre-stored corresponding LED light string, so that it may determine the junction temperature of the paths of LEDs lamp string.Its
The junction temperature of remaining two paths of LED lamp string is obtained by same mode measurement.Further, single-chip microcontroller 21 can also be according to the pre-stored data
Junction temperature-luminous intensity/chromaticity coordinates curve of each LED light string is modified the duty ratio of the LED light string of corresponding color.In this way,
Although variations injunction temperature causes the luminous intensity of each paths of LEDs lamp string, color to occur compared to original state inclined in LED light string luminescence process
It moves, so that final display color/brightness of atmosphere lamp deviates with original state in the case of not correcting, but is obtained by measurement
The junction temperature of each paths of LEDs lamp string, it can be deduced that each paths of LEDs lamp string actual luminous intensity and actual color, root under current junction temperature
The duty ratio of each paths of LEDs lamp string is corrected accordingly, so that color and brightness that atmosphere lamp is shown are consistent with original state.
And when detecting LED light string excess temperature, single-chip microcontroller 21 can also reduce the duty ratio of LED light string, to control its temperature rise.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (6)
1. a kind of three-color LED atmosphere lamp control circuit, including power circuit, main control circuit, intermediate circuit and atmosphere lamp driving
Circuit；First output end of the power circuit is connect with the intermediate circuit, the second output terminal of power circuit and the atmosphere
Enclose lamp drive circuit connection；The intermediate circuit is connect with the main control circuit and body of a motor car bus respectively, it is described in
Between circuit for the output voltage of the power circuit to be converted into after the operating voltage of the main control circuit output to described
Atmosphere lamp control instruction from the body of a motor car bus is transmitted to the main control by main control circuit, the intermediate circuit
Circuit；The main control circuit includes single-chip microcontroller, and the single-chip microcontroller is used for according to the atmosphere lamp control instruction control received
The work of atmosphere lamp drive circuit processed；It is characterized in that, the atmosphere lamp drive circuit includes three paths of LEDs branches, each paths of LEDs
Branch includes current-limiting circuit, LED light string, constant-current circuit and switching circuit；
One end of the current-limiting circuit is connect with the second output terminal of the power circuit, the other end of current-limiting circuit with it is described
The anode connection of LED light string；
The constant-current circuit include PNP triode, the first NPN triode, the first voltage-stabiliser tube, the second voltage-stabiliser tube, first resistor and
Second resistance；The cathode of first voltage-stabiliser tube and one end of the first resistor are all connected to the cathode of the LED light string, institute
The other end for stating first resistor is connect with the emitter of the PNP triode；The base stage of PNP triode respectively with the first voltage-stabiliser tube
Anode connected with the collector of first NPN triode, the collector of PNP triode respectively with second voltage-stabiliser tube
The connection of the base stage of cathode and the first NPN triode；The emitter of first NPN triode is connect with one end of the second resistance；
The switching circuit includes switching tube, the first conduction terminal of the switching tube respectively with the other end of second resistance and second
The anode connection of voltage-stabiliser tube, the second conduction terminal ground connection of switching tube；The control terminal of the switching tube of three paths of LEDs branches is connected to
The first pwm signal output end, the second pwm signal output end and the third pwm signal output end of the single-chip microcontroller；
The LED light string of the three paths of LEDs branch is respectively red LED lamp string, green LED lamp string and blue led lamp string.
2. three-color LED atmosphere lamp control circuit as described in claim 1, which is characterized in that the first voltage of the single-chip microcontroller
Signal measurement end is connect with the anode of the anode of red LED lamp string, the anode of green LED lamp string and blue led lamp string respectively, institute
State the second voltage signal measurement end of single-chip microcontroller respectively with the cathode of red LED lamp string, the cathode of green LED lamp string and blue
The cathode of LED light string connects.
3. three-color LED atmosphere lamp control circuit as described in claim 1, which is characterized in that the switching tube is the 2nd NPN tri-
Pole pipe, the base stage of second NPN triode, collector and emitter respectively constitute the control terminal of the switching tube, first lead
Go side and the second conduction terminal；
The switching circuit includes 3rd resistor and the 4th resistance；The PWM of one end of the 3rd resistor and corresponding single-chip microcontroller
Signal output end connection, the other end of 3rd resistor one end with the base stage of the second NPN triode and the 4th resistance respectively
Connection, the other end of the 4th resistance are connect with the emitter of the second NPN triode.
4. three-color LED atmosphere lamp control circuit as described in claim 1, which is characterized in that the current-limiting circuit is by mutually simultaneously
Multiple current-limiting resistances composition of connection.
5. three-color LED atmosphere lamp control circuit as described in claim 1, which is characterized in that the intermediate circuit is by system collection
It is formed at chip.
6. three-color LED atmosphere lamp control circuit as described in claim 1, which is characterized in that each LED light string is by one
LED lamp bead or the identical LED lamp bead composition of multiple series aiding connections, color.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821913575.2U CN209526919U (en) | 2018-11-20 | 2018-11-20 | Three-color LED atmosphere lamp control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821913575.2U CN209526919U (en) | 2018-11-20 | 2018-11-20 | Three-color LED atmosphere lamp control circuit |
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| Publication Number | Publication Date |
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| CN209526919U true CN209526919U (en) | 2019-10-22 |
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ID=68214456
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| CN201821913575.2U Active CN209526919U (en) | 2018-11-20 | 2018-11-20 | Three-color LED atmosphere lamp control circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111565494A (en) * | 2020-07-10 | 2020-08-21 | 深圳市全智芯科技有限公司 | LED lamp control circuit and baton |
| CN113246844A (en) * | 2021-05-06 | 2021-08-13 | 常州普络斯车业有限公司 | Indicator lamp for automobile |
-
2018
- 2018-11-20 CN CN201821913575.2U patent/CN209526919U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111565494A (en) * | 2020-07-10 | 2020-08-21 | 深圳市全智芯科技有限公司 | LED lamp control circuit and baton |
| CN113246844A (en) * | 2021-05-06 | 2021-08-13 | 常州普络斯车业有限公司 | Indicator lamp for automobile |
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