CN111412723B - Lighting system, refrigerator and showcase - Google Patents
Lighting system, refrigerator and showcase Download PDFInfo
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- CN111412723B CN111412723B CN202010314000.4A CN202010314000A CN111412723B CN 111412723 B CN111412723 B CN 111412723B CN 202010314000 A CN202010314000 A CN 202010314000A CN 111412723 B CN111412723 B CN 111412723B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D27/00—Lighting arrangements
- F25D27/005—Lighting arrangements combined with control means
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
- A47F3/00—Show cases or show cabinets
- A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention provides a lighting system, which comprises a main control board and a collecting module, wherein the collecting module is used for collecting external illumination; and the color module is in communication connection with the main control board and is used for regulating and controlling the lighting color. Compared with the prior art, the lighting system provided by the invention has the advantages that the color module and the acquisition module are additionally arranged in the lighting system. Utilize collection module to gather external illumination signal and send communication signal to the main control board, the main control board sends communication signal to the colour module after carrying out the analysis to collection module's signal, and the colour module is after receiving the communication signal of main control board, adjusts current illumination, becomes the irradiant colour of present needs. The adjustment and the switching of the color of the illumination system are realized, the color of the current light is adjusted through the newly added color module, the current light is softer, the harm to eyes of a user when the user uses the illumination system in a dark environment is reduced, and the use experience of the user is improved. And the method conforms to humanized and industrialized design.
Description
Technical Field
The invention belongs to the technical field of illumination, and particularly relates to an illumination system, an illumination method and a refrigerator.
Background
At present, most of refrigerators mainly judge the opening and closing state of a refrigerator door by judging a spring mechanical structure or an electromagnetic induction device which is provided with a hole in an inner container of the refrigerator, so that the on and off of a compartment illuminating lamp are determined. When the door is opened, the room lamp is fully on, and when the door is closed, the lamp is off, so that the brightness of the room lamp cannot be directly adjusted; a few refrigerators can adjust the number of on/off of the compartment lamps according to the opening/closing angle of the door, so that the brightness of the compartment environment of the refrigerator is more appropriate; fewer refrigerators collect external environment brightness through a photosensitive device to directly control the brightness of an illuminating lamp in an open loop mode. The first two types of refrigerator lighting systems cannot directly control the brightness of a compartment lighting lamp, and people can feel dazzling when the refrigerator is opened in a dark environment; the latter cannot achieve more accurate brightness control. And almost no refrigerator capable of adjusting the color of compartment light exists in the market. There is not a good refrigerator lighting system that allows a comfortable visual experience when people go to get the contents of the refrigerator.
Disclosure of Invention
The invention aims to provide an illumination system to solve the problem that the color of light of a refrigerator compartment or a showcase is single in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: the lighting system comprises a main control panel and a collecting module for collecting external illumination; and the color module is in communication connection with the main control board and is used for regulating and controlling the lighting color.
Further, the color module comprises a driving module for generating at least two colors of light, and an identification module for identifying the generated colors and feeding back the identified colors to the main control board; one end of the driving module is in communication connection with the main control board, and the other end of the driving module is in communication connection with the identification module; one end of the identification module is in communication connection with the driving module, and the other end of the identification module is in communication connection with the main control board.
Further, the color module further comprises a feedback module for feeding back the illumination brightness generated by the driving module; one end of the feedback module is in communication connection with the driving module, and the other end of the feedback module is in communication connection with the main control board.
Further, the main control board comprises an MCU module for acquiring the illumination signal of the acquisition module.
Further, the lighting system further comprises a display module for sampling the acquisition module signal; one end of the display module is in communication connection with the acquisition module; and the other end of the display module is in communication connection with the main control board.
Further, the lighting system comprises a door switch for providing a signal to the main control board; the door switch is in communication connection with the main control board.
Further, the driving module is an RGB LED driving lamp panel.
Furthermore, the identification module and the feedback module are arranged on the RGB LED driving lamp panel.
Another object of the present invention is to provide a refrigerator including the above lighting system.
Still another object of the present invention is to provide a showcase, which includes the above-mentioned lighting system.
The lighting system provided by the invention has the beneficial effects that: compared with the prior art, the invention adds the color module and the acquisition module in the lighting system. Utilize collection module to gather external illumination signal and send communication signal to the main control board, the main control board sends communication signal to the colour module after carrying out the analysis to collection module's signal, and the colour module is after receiving the communication signal of main control board, adjusts current illumination, becomes the irradiant colour of present needs. The adjustment and the switching of the color of the illumination system are realized, for example, in a dark environment, the current illumination may have strong stimulation to eyes, the color of the current light is adjusted through the newly-added color module, the current light is softer, the harm to the eyes when the user uses the illumination system in the dark environment is reduced, and the use experience of the user is improved. And the method conforms to humanized and industrialized design.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a first schematic flow chart of a lighting system according to an embodiment of the present invention, in which some modules are not shown;
fig. 2 is a second schematic flowchart of the lighting system according to the embodiment of the present invention, in which some modules are not shown;
fig. 3 is a schematic structural diagram of an RGB LED driving circuit according to an embodiment of the present invention;
fig. 4 is a graph showing the correspondence between the illumination intensity and the photosensitive intensity of the photosensor.
Wherein, in the drawings, the reference numerals are mainly as follows:
1. a main control board; 2. an acquisition module;
31. a drive module; 32. an identification module; 33. a feedback module;
4. a display module; 5. and (4) opening and closing the door.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The first embodiment: referring to fig. 1, a lighting system according to an embodiment of the present invention will be described. The lighting system comprises a main control board 1, a collection module 2 and a color module. Wherein, collection module 2 is used for gathering external illumination and converts the illumination of gathering into the signal, and the colour module is used for regulating and controlling lighting system's colour, and the colour module is connected with 1 communication of main control board.
The specific working process is as follows: the main control board 1 sends the communication signal that needs to gather the illumination signal to the external world to collection module 2, and the main control board 1 acquires the illumination signal that collection module 2 gathered and carries out the analysis to the illumination signal who acquires, and main control board 1 sends communication signal to the colour module after carrying out the analysis to the illumination signal, and the colour module carries out the analysis and produces the light that needs under the current situation according to the communication signal that main control board 1 sent. For example, blue light is currently required, and the real-time light color is white, at this time, the color module performs color control on the white light, and converts the white light into blue light (the color of the light is determined by the wavelength and the frequency of the light, and it is not described again how the color module performs color control on the light).
Compared with the prior art, the lighting system provided by the invention is additionally provided with the color module and the acquisition module 2. Utilize collection module 2 to gather external illumination signal and send communication signal to main control board 1, main control board 1 carries out the analysis to collection module 2's signal and sends communication signal to the colour module, and the colour module is after receiving main control board 1's communication signal, adjusts current illumination, becomes the irradiant colour that needs at present with current illumination colour adjustment. The adjustment and the switching of the color of the illumination system are realized, for example, in a dark environment, the current illumination may have strong stimulation to eyes, the color of the current light is adjusted through the newly-added color module, the current light is softer, the harm to the eyes when the user uses the illumination system in the dark environment is reduced, and the use experience of the user is improved. And the method conforms to humanized and industrialized design.
Specifically, the color module includes a driving module 31 and an identification module 32, the driving module 31 is configured to generate light of different colors, and the identification module 32 is configured to identify the light generated by the driving module 31 and feed back a communication signal to the main control board 1. The driving module 31 timely adjusts the color of the current light after receiving the communication signal of the main control board 1, so that the color of the light is adjusted to the color of the light suitable for the current requirement.
In addition, the color module further includes a feedback module 33, the feedback module 33 is configured to collect brightness of the light emitted by the driving module 31 and send the collected brightness to the main control board 1 in a communication signal manner, and the main control board 1 will receive color (the above-mentioned feedback of the identification module 32) and intensity (the above-mentioned brightness of the light) of the light.
The specific working process is as follows: the acquisition module 2 acquires external illumination and then sends a communication signal to the main control board 1, and the main control board 1 analyzes and processes the received signal to obtain the color and the intensity of the light required at present; subsequently, the main control board 1 sends a communication signal to the driving module 31, the driving module 31 sends a communication signal of what color is needed to the identification module 32 under the condition that the color and intensity of the needed light are known, the driving module 31 sends a communication signal of what illumination intensity is needed to the feedback module 33, the identification module 32 feeds back the color information to the main control board 1, and the feedback module 33 feeds back the brightness information of the light to the main control board 1. The main control board 1 is fed back by the identification module 32 and the feedback module 33, so that the illumination color and the brightness can be adjusted at the same time.
In this embodiment, the main control board 1 further includes an MCU, and the MCU is configured to control the collection module 2 to collect light from the outside at a proper time.
Further, referring to fig. 2 and fig. 3, as another embodiment of the lighting system provided by the present invention, on the basis of the first embodiment, a display module 4 and a door switch 5 are added, and this embodiment is suitable for a device in which the main control board 1 does not have an MCU and has a door for opening and closing. Wherein, the acquisition module 2 is connected in communication to one end of the display module 4, and the main control board 1 is connected in communication to the other end. Unlike the first embodiment, in the present embodiment, the display module 4 is controlled by the main control board 1, and the display module 4 controls the acquisition module 2. In the first embodiment, the acquisition module 2 is controlled by the MCU in the main control board 1. The main control board 1 of the two embodiments has differences because the two embodiments are different in applicable occasions, the first embodiment is mostly applicable to devices which do not need an MCU module, and a display module 4 is needed to display some necessary displayed information; and the second method needs an MCU module to realize control without displaying some information. In addition, the second embodiment further includes a door switch 5, and the communication connection between the door switch 5 and the main control board 1 is because the device applied in the second embodiment needs a door to open and close. Therefore, according to the design of the two embodiments, a new module and a corresponding module or a communication connection between the new module and the main control board 1 can be added according to the specific needs or requirements of the applied device, so as to implement new functions or requirements.
In detail, the driving module 31 is selected as an RGB LED driving lamp panel, wherein the RGB LED lamp panel of the first embodiment integrates a driving circuit, an RGB LED lamp, a feedback module 33, and an identification module 32; the RGB LED lamp panel of the second embodiment integrates the driving module 31, the RGB LED lamp, the feedback module 33, and the color module.
The specific working principle of the RGB LED driving circuit is as follows: the brightness of the RGB LED light is determined by the current flowing through the RGB LED light. When the flowing current is larger, the light is brighter; when the current flowing is smaller; the darker the light.
In detail, referring to fig. 3, the RGB LED is composed of three LEDs capable of emitting red light, green light, and blue light. According to the color principle, one color can be regarded as being prepared by Red, Green and Blue according to a certain proportion, the color can be represented as RGB (a, b and c), and the a, b and c are three integers of 0-255. Therefore, the light color, that is, the light intensity of the red, green, and blue lights of the RGB LED, should be adjusted. I.e. to regulate the current through the three lamps.
Each RGB LED is connected with three output ports of the driving chip, the current of each output port of the driving chip is controlled by a control signal sent to the driving chip by the main chip, and the control signal sent to the driving chip by the main chip comprises two aspects: identification signals of the output ports OUT0-OUT23 and PWM with a certain duty ratio. The port identification signal is used to determine which output port this control signal controls; the PWM with a certain duty ratio is used to control the current of the output port, assuming that the maximum current that can flow in the output port is Imax, the current flowing in the PWM control port with the duty ratio D is: i = D × Imax, where D is the duty cycle.
According to the above, it is desirable to adjust the brightness and color of the light, which is to obtain the duty ratio of the PWM in the control signal sent by the main chip.
The invention also provides a refrigerator comprising the lighting system in the second embodiment.
The invention also provides a display cabinet, which comprises the lighting system in the first embodiment.
The above mentioned lighting system, refrigerator and showcase are described in more detail below:
the first embodiment: the showcase lighting system capable of automatically adjusting the brightness and the color of the light is a simplified version of a lighting system capable of automatically adjusting the brightness and the color of the light of a refrigerator compartment. The showcase lighting system capable of automatically adjusting the brightness and the color of the light can control the RGB LED to emit the most suitable light, so that a user can have better visual experience when watching exhibits. The system works as follows:
when the system control switch is turned on, the main control board 1 starts to perform A/D sampling on the illumination information collected by the external illumination module to obtain the brightness information of the external environment; meanwhile, the identification module 32 identifies the color information of the exhibit and transmits the color information to the main control board 1.
The program of the main control board 1 processes the illumination information and the color information to obtain the light information that the RGB LED should send the most suitable brightness and color, and the corresponding control signal is produced preliminarily. And then sending a corresponding control signal to the RGB LED driving lamp panel.
And when the RGB LED driving board receives the control signal, the RGB LED is controlled to emit light with the calculated brightness and color.
The feedback module 33 collects the brightness of the lamplight, and the main control board 1 obtains brightness information through A/D sampling; the recognition module 32 recognizes the color of the light and transmits the color information to the main control board 1.
The main control board 1 adjusts the control signal according to a set program according to the brightness information and the color information obtained by feedback, and sends the adjusted control signal to the RGB LED lamp panel. And repeating the steps until the RGB LED emits light with brightness and color which are most suitable for the environment.
Second embodiment: when the refrigerator door is opened, the lighting system automatically adjusts the working process of the brightness and the color of the RGB LED:
the door switch 5 adopts a spring mechanical structure, when the door is opened, the door switch 5 is in an opening state, the main control board 1 receives a door opening and closing state signal, and the door is judged to be in an opening state at the moment.
The main control panel 1 sends a communication signal to the display panel to inform the display panel to start sampling the signal of the external illumination acquisition module 2.
The external illumination acquisition module 2 is integrated on the display panel arranged on the outer surface of the refrigerator door body, the external illumination acquisition module 2 can acquire the illumination intensity of the external environment of the refrigerator, and the display panel (namely the display module 4) acquires illumination information through A/D sampling.
The display panel transmits the illumination information to the main control panel 1 through the communication signal. Meanwhile, the identification module 32 identifies color information of the contents stored in the refrigerator compartment and transmits the color information to the main control panel 1. After the main control board 1 obtains the two pieces of information, the program operation (see the program calculation method of RGB LED light emission intensity mentioned below) is performed to preliminarily obtain the most suitable luminance and color information that the RGB LED should emit, and generate the corresponding control signal.
And when the RGB LED driving lamp panel receives the control signal, the RGB LED is controlled to emit light with the calculated brightness and color.
The feedback module 33 collects the brightness of the lamplight, and the main control board 1 obtains brightness information through A/D sampling; the recognition module 32 recognizes the color of the light and transmits the color information to the main control board 1.
The main control board 1 adjusts the control signal according to a set program according to the brightness information and the color information obtained by feedback, and sends the adjusted control signal to the RGB LED lamp panel. And repeating the steps until the RGB LED emits light with brightness and color which are most suitable for the environment.
When the refrigerator door is closed, the lighting system automatically adjusts the RGB LED non-luminous working process:
when the door is closed, the door switch 5 is in a closed state, and the main control board 1 receives a door opening and closing state signal and judges that the door is in a closed state at the moment.
The main control board 1 stops sending the control signal, and at this time, stops processing the luminance information and the color information.
Meanwhile, the main control panel 1 sends a communication signal to inform the display panel to stop sampling the external illumination.
The whole lighting system is in a low-power consumption standby state, and when the door is opened again, the steps of controlling the brightness and the color of the RGB LEDs when the door is opened are executed.
The program calculation method of the RGB LED luminous intensity comprises the following steps:
the external illumination acquisition module 2 comprises a photosensitive sensor, and the resistance of the photosensitive sensor can be changed under different illumination intensities, namely, different volt-ampere characteristics are presented. The main chip of the display panel obtains the volt-ampere characteristic of the photosensitive sensor through A/D sampling, then obtains the illumination intensity of the external illumination environment according to the volt-ampere characteristic of the photosensitive sensor, and the photosensitive intensity of the photosensitive sensor is equal to the illumination intensity of the external illumination environment at the moment and is marked as X. The display panel transmits the intensity of light sensing X of the photosensor to the main control panel 1.
The main control panel 1 calculates the luminous intensity Y of the RGB LED according to the photosensitive intensity of the photosensor. The corresponding relation graph of the illumination intensity of the illuminating lamp and the photosensitive intensity of the photosensitive sensor shows that the X axis is the square root of the photosensitive intensity of the photosensitive sensor, and the Y axis is the luminous brightness of the illuminating lamp. Setting the luminous brightness Y and the photosensitive intensity of the illuminating lamp as X, wherein the relation between Y and X is as follows:
and obtaining the required current value I when the luminous intensity of the RGB LED is Y according to the self luminous characteristics of the RGB LED.
And obtaining the duty ratio D of the PWM in the control signal according to the formula I = D × Imax.
The main chip of the main control board 1 configures PWM with duty ratio D, and sends the calculated control signal to the driving chip of the RGB LED driving lamp panel, and the driving chip drives the RGB LED to emit light with desired brightness.
The program calculation method of the RGB LED light-emitting color comprises the following steps:
as shown in fig. 3 and 4, the camera of the identification module 32 captures the image information of the refrigerator compartment and transmits the image information to the image processing chip of the identification module 32.
And the image processing chip intercepts an image by using PIL, then converts RGB into HSV for judgment, counts and judges colors, and finally outputs RGB (a, b and c) values. The image processing chip sends the color information to the main control board 1.
The main control board 1 calculates the current I of each driving port when it is desired to emit the color, based on the values of RGB (a, b, c) in combination with the light emission characteristics of the RGB LED itself to be driven.
And obtaining the duty ratio D of the PWM of the control signal according to the formula I = D × Imax.
The main chip of the main control board 1 configures PWM with duty ratio D, and sends the calculated control signal to the driving chip of the RGB LED driving lamp panel, and the driving chip drives the RGB LED to emit light with the desired color.
The lighting system, the refrigerator and the showcase have the following advantages: not only can the effect of directly controlling the brightness of the light be achieved, but also the effect of allocating the color of the light can be achieved. By adopting a closed-loop control method, the brightness and the color of the light are more accurately controlled, and more comfortable visual experience is brought to people.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The refrigerator is characterized by comprising an illumination system, wherein the illumination system comprises a main control board, a collection module which is in communication connection with the main control board and is used for collecting outside illumination, and a color module which is in communication connection with the main control board and is used for regulating and controlling illumination colors;
the color module comprises a driving module for generating at least two colors of light and an identification module for identifying the generated colors and feeding the identified colors back to the main control board;
the color module also comprises a feedback module for feeding back the illumination brightness generated by the driving module;
one end of the driving module is in communication connection with the main control board, and the other end of the driving module is in communication connection with the identification module;
one end of the identification module is in communication connection with the driving module, and the other end of the identification module is in communication connection with the main control board; one end of the feedback module is in communication connection with the driving module, and the other end of the feedback module is in communication connection with the main control board;
the lighting system further comprises a display module for sampling the acquisition module signal; one end of the display module is in communication connection with the acquisition module; the other end of the display module is in communication connection with the main control board;
the display module arranged on the outer surface of the refrigerator door body integrates the acquisition module, and the acquisition module acquires the illumination intensity of the external environment of the refrigerator.
2. The refrigerator of claim 1, wherein:
the door switch is used for providing signals for the main control panel;
the door switch is in communication connection with the main control board.
3. The refrigerator of claim 1, wherein: the driving module is an RGB LED driving lamp panel.
4. The refrigerator of claim 3, wherein: the identification module and the feedback module are arranged on the RGB LED driving lamp panel.
5. The showcase is characterized by comprising an illumination system, wherein the illumination system comprises a main control board, a collection module which is in communication connection with the main control board and is used for collecting outside illumination, and a color module which is in communication connection with the main control board and is used for regulating and controlling illumination colors;
the color module comprises a driving module for generating at least two colors of light and an identification module for identifying the generated colors and feeding the identified colors back to the main control board;
the color module also comprises a feedback module for feeding back the illumination brightness generated by the driving module;
one end of the driving module is in communication connection with the main control board, and the other end of the driving module is in communication connection with the identification module;
one end of the identification module is in communication connection with the driving module, and the other end of the identification module is in communication connection with the main control board; one end of the feedback module is in communication connection with the driving module, and the other end of the feedback module is in communication connection with the main control board;
and when the system control switch is turned on, the main control board starts to carry out A/D sampling on the illumination information collected by the external illumination collection module to obtain the brightness information of the external environment.
6. The display case of claim 5, wherein: the main control board comprises an MCU module for acquiring the illumination signal of the acquisition module.
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| CN202010314000.4A CN111412723B (en) | 2020-04-20 | 2020-04-20 | Lighting system, refrigerator and showcase |
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| CN202010314000.4A CN111412723B (en) | 2020-04-20 | 2020-04-20 | Lighting system, refrigerator and showcase |
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| CN101949627A (en) * | 2009-06-22 | 2011-01-19 | 三星电子株式会社 | Refrigerator |
| CN204806824U (en) * | 2015-06-16 | 2015-11-25 | 合肥美的电冰箱有限公司 | Illumination structure and refrigerator |
| CN105323934A (en) * | 2015-11-27 | 2016-02-10 | 青岛海尔股份有限公司 | Lighting control method for refrigerator |
| CN206846596U (en) * | 2017-03-21 | 2018-01-05 | 华中农业大学 | A kind of pig house emulation illumination apparatus based on primitive colours LED |
| CN110831277A (en) * | 2019-10-09 | 2020-02-21 | 安徽汉思电气技术股份有限公司 | Lighting controller based on thing networking |
| CN111010779A (en) * | 2019-12-06 | 2020-04-14 | 深圳市国电科技通信有限公司 | Multifunctional lighting device and multifunctional lighting system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101142856A (en) * | 2004-11-29 | 2008-03-12 | Tir技术有限公司 | Integrated modular lighting unit |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949627A (en) * | 2009-06-22 | 2011-01-19 | 三星电子株式会社 | Refrigerator |
| CN204806824U (en) * | 2015-06-16 | 2015-11-25 | 合肥美的电冰箱有限公司 | Illumination structure and refrigerator |
| CN105323934A (en) * | 2015-11-27 | 2016-02-10 | 青岛海尔股份有限公司 | Lighting control method for refrigerator |
| CN206846596U (en) * | 2017-03-21 | 2018-01-05 | 华中农业大学 | A kind of pig house emulation illumination apparatus based on primitive colours LED |
| CN110831277A (en) * | 2019-10-09 | 2020-02-21 | 安徽汉思电气技术股份有限公司 | Lighting controller based on thing networking |
| CN111010779A (en) * | 2019-12-06 | 2020-04-14 | 深圳市国电科技通信有限公司 | Multifunctional lighting device and multifunctional lighting system |
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