CN116567898A - Track lamp assembly and track lighting device - Google Patents

Track lamp assembly and track lighting device Download PDF

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Publication number
CN116567898A
CN116567898A CN202310473845.1A CN202310473845A CN116567898A CN 116567898 A CN116567898 A CN 116567898A CN 202310473845 A CN202310473845 A CN 202310473845A CN 116567898 A CN116567898 A CN 116567898A
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CN
China
Prior art keywords
track
voltage
resistor
circuit
level
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310473845.1A
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Chinese (zh)
Inventor
彭庆
江锦标
邹伟宏
蒋志勇
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Guangdong Muguang Intelligent Lighting Co ltd
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Guangdong Muguang Intelligent Lighting Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Guangdong Muguang Intelligent Lighting Co ltd filed Critical Guangdong Muguang Intelligent Lighting Co ltd
Priority to CN202310473845.1A priority Critical patent/CN116567898A/en
Publication of CN116567898A publication Critical patent/CN116567898A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/18—Controlling the light source by remote control via data-bus transmission
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

The application discloses track lamp subassembly and track lighting device belongs to electron electrical technology field. The track light assembly includes: the data transmitting circuit is configured to limit the current of the positive power supply voltage signal when the voltage at the signal output end is at a first level and then provide the positive power supply voltage signal to the data receiving and transmitting end, and provide the voltage signal with the voltage at the second level to the data receiving and transmitting end when the voltage at the signal output end is at a second level; a data receiving circuit configured to set a voltage at the signal input terminal to the same level as a voltage at the data transmitting terminal; and a control circuit configured to supply the data signal, whose voltage is switched between the first level and the second level, to the signal output terminal during the data transmission period, and to receive the data signal transmitted on the data transmission line by determining the level of the voltage at the signal input terminal during other periods. The utility model provides a can help solving current intelligent track lamp product and connect the problem of anti-data transmission line when installing track lamp subassembly easily.

Description

Track lamp assembly and track lighting device
Technical Field
The present application relates to the electronic and electrical arts, and more particularly to a track light assembly and a track lighting device.
Background
Different from traditional lamps and lanterns, the power plug of drawing forth by the power cord has been saved to lamps and lanterns in the track lamp product, and each lamps and lanterns all install on the track that is connected with the power, and each lamps and lanterns can remove and not influence the normal work of lamps and lanterns in the optional position on the track, have not only reduced the quantity of required power cord, power plug and power socket, and the installation, layout, maintenance and the change of lamps and lanterns also become simpler.
The wired intelligent track lamp product not only utilizes the track to transfer power supply voltage, but also utilizes the track to transmit data between track lamp components mounted on the track, thereby realizing richer application functions. For example, a control host installed on a track receives a control command of a user terminal through wireless connection, and transmits the control command sent by the control host to each lamp installed on the track through the track, so that each lamp synchronously executes corresponding lighting operation according to the received control command, and convenient functions such as a sound control switch, a timing switch, a custom condition switch, light effect switching and the like are realized.
However, the current wired intelligent track lamp products all need to set at least two different data transmission lines in the track to realize data transmission between the track lamp assemblies, and the track lamp assemblies need to be carefully distinguished between the two data transmission lines and cannot be connected reversely during installation, which brings a plurality of troubles to design, layout, installation and use of related components.
Disclosure of Invention
The application provides a track lamp subassembly and track lighting device can help solving current intelligent track lamp product and connect the problem of anti-data transmission line easily when installing the track lamp subassembly.
The embodiment of the application provides a track lamp assembly, which is used for being installed on a track, wherein a positive power supply end, a negative power supply end and a data receiving and transmitting end of the track lamp assembly installed on the track are respectively connected with a positive power supply voltage line, a negative power supply voltage line and a data transmission line in the track; the track lamp assembly comprises a data sending circuit, a data receiving circuit and a control circuit; wherein, the liquid crystal display device comprises a liquid crystal display device,
the data transmitting circuit is respectively connected with the positive power supply end, the data receiving and transmitting end and the signal output end of the control circuit, and is configured to limit the current of the positive power supply voltage signal when the voltage at the signal output end is at a first level and then provide the positive power supply voltage signal to the data receiving and transmitting end, and provide the voltage signal with the voltage at the second level to the data receiving and transmitting end when the voltage at the signal output end is at the second level; the positive power supply voltage signal is a voltage signal with the voltage provided by the positive power supply end being the first level, and the first level is higher than the second level;
The data receiving circuit is respectively connected with the data receiving and transmitting end and the signal input end of the control circuit, and is configured to set the voltage at the signal input end to the first level when the voltage at the data receiving and transmitting end is the first level and set the voltage at the signal input end to the second level when the voltage at the data receiving and transmitting end is the second level;
the control circuit is configured to supply the signal output terminal with a data signal whose voltage is switched between the first level and the second level during a data transmission period, and to receive the data signal transmitted on the data transmission line by determining a level of the voltage at the signal input terminal during a period other than the data transmission period.
In some possible implementations, the track corresponding to the data transmission line includes a first data transmission line and a second data transmission line, and the data transceiver of the track light assembly includes a first terminal for connecting the first data transmission line and a second terminal for connecting the second data transmission line, the first terminal being connected to the second terminal.
In some possible implementations, the track light assembly further includes a rectifying circuit disposed between the data transmitting circuit and the positive power supply terminal, a first input terminal of the rectifying circuit being connected to the positive power supply terminal, a second input terminal of the rectifying circuit being connected to the negative power supply terminal, a first output terminal of the rectifying circuit being connected to the data transmitting circuit, and a second output terminal of the rectifying circuit being connected to a common terminal of the track light assembly.
In some possible implementations, the rectifying circuit includes a first diode, a second diode, a third diode, and a fourth diode; the first input end of the rectifying circuit is respectively connected with the anode of the first diode and the cathode of the fourth diode, the second input end of the rectifying circuit is respectively connected with the anode of the second diode and the cathode of the third diode, the first output end of the rectifying circuit is respectively connected with the cathode of the first diode and the cathode of the second diode, and the second output end of the rectifying circuit is respectively connected with the anode of the third diode and the anode of the fourth diode.
In some possible implementations, the data transmitting circuit includes a first resistor and a first switching element, and the data receiving circuit includes a first zener diode and a second resistor; the first end of the first resistor is connected with the first output end of the rectifying circuit, and the second end of the first resistor is connected with the data receiving and transmitting end; the control end of the first switching element is connected with the signal output end of the control circuit, the first end of the first switching element is connected with the data receiving and transmitting end, the second end of the first switching element is connected with the common end, the first switching element is a switching element which is disconnected between the first end and the second end when the voltage at the control end is at the first level, and is connected between the first end and the second end when the voltage at the control end is at the second level; the positive electrode of the first zener diode is connected with the signal input end of the control circuit, and the negative electrode of the first zener diode is connected with the data receiving and transmitting end; the first end of the second resistor is connected with the signal input end of the control circuit, the second end of the second resistor is connected with the common end, and the voltage value obtained by multiplying the resistance value of the second resistor and the minimum stable current of the first zener diode is in the voltage value range of the first level.
In some possible implementations, the track light assembly further includes a voltage converter circuit having a voltage input connected to the first output of the rectifying circuit, a ground connected to the common, and a voltage output connected to the control circuit, the data transmitting circuit, and the data receiving circuit, respectively, the voltage converter circuit being configured to provide an operating voltage to the control circuit, the data transmitting circuit, and the data receiving circuit.
In some possible implementations, the data transmission circuit includes a first transistor, a second transistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor; the first end of the third resistor is connected with the first output end of the rectifying circuit, and the second end of the third resistor is connected with the data receiving and transmitting end; the first end of the fourth resistor is connected with the signal output end of the control circuit, and the second end of the fourth resistor is connected with the grid electrode of the first transistor; a first end of the fifth resistor is connected with a voltage output end of the voltage converter circuit, and a second end of the fifth resistor is connected with a grid electrode of the first transistor; a first end of the sixth resistor is connected with the grid electrode of the first transistor, and a second end of the sixth resistor is connected with the common end; a first electrode of the first transistor except for the grid electrode is connected with the grid electrode of the second transistor, and a second electrode of the first transistor except for the grid electrode is connected with the common terminal; a first end of the seventh resistor is connected with the voltage output end of the voltage converter circuit, and a second end of the seventh resistor is connected with the grid electrode of the second transistor; the first pole of the second transistor except the grid electrode is connected with the data receiving and transmitting end, and the second pole of the second transistor except the grid electrode is connected with the common end.
In some possible implementations, the data receiving circuit includes a second zener diode, a third transistor, a fourth transistor, an eighth resistor, a ninth resistor, a tenth resistor, and an eleventh resistor; the negative electrode of the second zener diode is connected with the data receiving and transmitting end, and the positive electrode of the second zener diode is connected with the first end of the eighth resistor; the second end of the eighth resistor is connected with the grid electrode of the third transistor; a first end of the ninth resistor is connected with the grid electrode of the third transistor, and a second end of the ninth resistor is connected with the common end; a first end of the tenth resistor is connected with a voltage output end of the voltage converter circuit, and a second end of the tenth resistor is connected with a grid electrode of the fourth transistor; the first end of the eleventh resistor is connected with the voltage output end of the voltage converter circuit, and the second end of the eleventh resistor is connected with the signal input end of the control circuit; a first electrode of the third transistor except the grid electrode is connected with the grid electrode of the four transistors, and a second electrode of the third transistor except the grid electrode is connected with the common terminal; a first pole of the fourth transistor except for the grid electrode is connected with the signal input end of the control circuit, and a second pole of the fourth transistor except for the grid electrode is connected with the common end.
In some possible implementations, the control circuit is configured to determine the level of the voltage at the signal input by comparing the magnitude between a voltage value at the signal input and a reference voltage value equal to the sum of the regulated voltage of the second zener diode and the gate-on voltage of the third transistor.
The embodiment of the application also provides a track lighting device, which comprises: a track, and at least one of any of the track light assemblies described above mounted on the track.
In some possible implementations, the track lighting device includes at least two of the track light assemblies including a first track light assembly and at least one second track light assembly; wherein the second track light assembly further comprises a lighting circuit connected to a lighting control end of a control circuit in the second track light assembly, the lighting circuit being configured to emit light under control of a lighting control signal of the lighting control end; the control circuit in the first track light assembly includes a processor for transmitting a data signal including a lighting control instruction to the at least one second track light assembly via a data transmission line in the track and switching between the first level and the second level upon execution of the executable instructions to cause the control circuit in the second track light assembly to generate the lighting control signal in accordance with the lighting control instruction, and a memory for storing the executable instructions of the processor.
It can be seen that the track lamp assembly according to the embodiment of the present application has a function of realizing data transmission between each other by using only one data transmission line, that is, the control circuit of the first track lamp assembly installed on the track can provide the data signal switched between the first level and the second level to the signal output terminal, and provide the signal with the level corresponding to the change to the data transmission line connected to the data receiving terminal by using the data transmitting circuit; the data receiving circuit of the second track lamp assembly arranged on the same track can set the level of the signal input end of the control circuit of the second track lamp assembly to a corresponding level according to the level on the data transmission line, so that the control circuit can receive the data signal transmitted on the data transmission line by determining the level of the signal input end; further, the control circuit is configured to receive the data signal in a period other than the data transmission period, and thus no self-reception occurs. Therefore, any two or more track lamp assemblies installed on the same track can realize half-duplex bidirectional data transmission by using only one data transmission line, the trouble caused by dependence on a plurality of data transmission lines can be solved, and the track lamp assemblies do not need to distinguish directions during installation; moreover, the circuit structure for realizing the data receiving circuit and the data transmitting circuit can be very simple, is favorable for simplifying the internal structure, the design process and the installation process of the track and the track lamp assembly, and greatly improves the use convenience of the wired intelligent track lamp product.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a track lighting device according to a comparative example of the present application;
FIG. 2 is a schematic view of a track lighting device according to one embodiment of the present application;
FIG. 3 is a schematic view of a track lighting device according to another embodiment of the present application;
FIG. 4 is a schematic circuit diagram of a first track light assembly and a second track light assembly of the track lighting device of FIG. 3;
FIG. 5 is a schematic diagram of the circuit principle of the track lighting device shown in FIG. 4 in which the first track light assembly transmits a second level to the second track light assembly;
FIG. 6 is a schematic diagram of the circuit principle of the first track light assembly transmitting a first level to the second track light assembly in the track lighting device shown in FIG. 4;
Fig. 7 is a schematic circuit diagram of a track light assembly according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
Fig. 1 is a schematic structural view of a track lighting device in a comparative example of the present application. Referring to fig. 1, the track lighting device includes a lamp track 110, a control host 120 mounted on the lamp track 110, and two track lamps 130, wherein the lamp track 110 includes: a power supply 111, a positive power supply line L1 supplied with a positive power supply voltage signal by the power supply 111, a negative power supply line L2 supplied with a negative power supply voltage signal by the power supply 111, and a first data transmission line L3 and a second data transmission line L4 provided inside the lamp track 110. The positive power line L1 is connected to the positive power end of the control host 120 and each track lamp 130, and the negative power line L2 is connected to the negative power end of the control host 120 and each track lamp 130, so that the power source 111 supplies power to the control host 120 and each track lamp 130; the control host 120 and the first data connection end of each track light fixture 130 are coupled together by a first data transmission line L3 in the light fixture track 110, and the control host 120 and the second data connection end of each track light fixture 130 are coupled together by a second data transmission line L4 in the light fixture track 110, such that the control host 120 and each track light fixture 130 are capable of data communication with each other based on a communication protocol such as an RS-485 serial communication standard or a digital addressable lighting interface (Digital Addressable Lighting Interface, DALI) digital lighting control international standard or the like.
Unlike conventional light fixtures, the track light fixtures 130 in the track lighting device omit power plugs led out by power lines, each track light fixture 130 is mounted on the light fixture track 110 comprising the power source 111, and each track light fixture 130 can move at any position on the light fixture track 110 without affecting the normal operation of the track light fixture, so that the number of power lines, power plugs and power plug seats required is reduced, and the mounting, arrangement, maintenance and replacement of the light fixtures are simpler. Moreover, the track lighting device also utilizes the lamp track 110 to realize data transmission between track lamp assemblies mounted on the track, thereby being capable of realizing more abundant application functions. In one example, the control host 120 installed on the light track 110 receives the control command of the user terminal through a wireless connection, and transmits the control command sent by the control host 120 to each track light 130 installed on the track through the light track 110, so that each track light 130 can synchronously perform a corresponding lighting operation according to the received control command, and convenient functions such as a voice control switch, a timing switch, a custom condition switch, a light effect switch, and the like are realized.
It should be noted that, the track light assembly described herein refers to a component of the track lighting device for being mounted on a track, for example, the control host 120 and the track light fixture 130 are each a track light assembly; further, structures such as power lines and data transmission lines in the track described herein refer to conductor structures extending along the extending direction of the track for conducting voltage, current or electrical signals, and are not necessarily in the form of wires or lines.
In the related art, two or more data transmission lines must be used for data communication between the track light assemblies. For example, the RS-485 communication protocol requires two data transmission lines, and requires a corresponding connection between the data transmission end and the data transmission line when the track lamp assembly is installed, so that the data transmission end and the data transmission line cannot be connected reversely, otherwise, the data communication is abnormal; therefore, the track lighting device based on the RS-485 communication protocol has the problem that the installation mode of the track lamp assembly is complex in use, and the abnormal condition that one track lamp assembly is connected with the other track lamp assembly to cause that the whole track lighting device cannot work normally often occurs.
Fig. 2 is a schematic structural diagram of a track light device according to an embodiment of the present application, where a track light assembly has a function of implementing data transmission between each other using only one data transmission line, so as to help solve the above problem of easy connection of the data transmission line when the track light assembly is installed. Referring to fig. 2, the track lighting device includes a track 10 and at least one track lamp assembly 20 mounted on the track 10, the track 10 having a positive power supply voltage line LA, a negative power supply voltage line LB, and a data transmission line LC disposed therein, the track lamp assembly 20 having a positive power supply terminal U1, a negative power supply terminal U0, and a data receiving and transmitting terminal SR; when the track lamp assembly 20 is mounted on the track 10, the positive power supply terminal U1, the negative power supply terminal U0, and the data receiving and transmitting terminal SR of the track lamp assembly 20 are connected to the positive power supply voltage line LA, the negative power supply voltage line LB, and the data transmission line LC, respectively, in the track 10.
The track lamp assembly 20 includes a data transmitting circuit 21, a data receiving circuit 22, and a control circuit 23, wherein the data transmitting circuit 21 is respectively connected to the positive power terminal U1, the data receiving terminal SR, and the signal output terminal Tx of the control circuit 23. The data transmission circuit 21 is configured to current-limit the positive power supply voltage signal to the data reception terminal SR when the voltage at the signal output terminal Tx is at a first level, and supply the voltage signal at the second level to the data reception terminal SR when the voltage at the signal output terminal Tx is at a second level. The positive power supply voltage signal is a voltage signal with a first level, which is higher than the second level, and the voltage provided by the positive power supply terminal U1 is the first level. In one example, the first level is high and the second level is low. The data receiving circuit 22 is connected to the data receiving terminal SR and the signal input terminal Rx of the control circuit 23, respectively. The data receiving circuit 22 is configured to set the voltage at the signal input terminal Rx to a first level when the voltage at the data receiving terminal SR is a first level, and to set the voltage at the signal input terminal Rx to a second level when the voltage at the data receiving terminal SR is a second level. The control circuit 23 is configured to supply the signal output terminal Tx with a data signal whose voltage is switched between the first level and the second level during a data transmission period, and to receive the data signal transmitted on the data transmission line LC by determining the level of the voltage at the signal input terminal Rx during a period other than the data transmission period.
It can be seen that the track light assembly 20 of the present embodiment has the function of enabling data transmission between each other using only one data transmission line LC. In one example, the track lighting device includes a track 10 and first and second track light assemblies mounted on the track 10, the internal structure of the first and second track light assemblies having an internal structure similar to the track light assembly 20 shown in fig. 2; thus, the control circuit 23 of the first track lamp assembly mounted on the track 10 can supply the signal output terminal Tx with the data signal switched between the first level and the second level, and supply the data transmission line LC connected to the data receiving terminal SR with the signal of the level corresponding to the change by the data transmitting circuit 22; and the data receiving circuit 22 of the second track light assembly mounted on the same track 10 can set the level of the signal input terminal Rx of the control circuit 23 of the second track light assembly to a corresponding level according to the level on the data transmission line LC, so that the control circuit 23 of the second track light assembly can receive the data signal from the first track light assembly transmitted on the data transmission line LC by determining the level of the signal input terminal Rx; further, the control circuit 23 is configured to receive the data signal in a period other than the data transmission period, and thus no self-reception occurs. As can be seen from the above examples, any two or more track lamp assemblies 20 mounted on the same track 10 can realize half-duplex bidirectional data transmission between each other using only one data transmission line LC, so that the trouble caused by the dependence on a plurality of data transmission lines in the related art can be solved and the track lamp assemblies 20 do not need to distinguish different data transmission lines or data connection terminals at the time of mounting; moreover, the circuit structure for realizing the data receiving circuit 21 and the data transmitting circuit 22 can be very simple, which is beneficial to simplifying the internal structure, the design process and the installation process of the track 10 and the track lamp assembly 20, and greatly improves the use convenience of the wired intelligent track lamp product.
In one example, the data transceiver SR of the track light assembly 20 includes a first terminal for connecting the first data transmission line and a second terminal for connecting the second data transmission line, and the first terminal and the second terminal are connected inside the track light assembly 20, corresponding to a track (e.g., the light fixture track 110 described in fig. 1) in which the data transmission line includes the first data transmission line and the second data transmission line. That is, the data transceiver SR of the track light assembly 20 for connecting the data transmission line in the track may be configured to be compatible with both the four-wire light rail 110 as shown in fig. 1 and the three-wire rail 10 as shown in fig. 2, such as the data transceiver SR including a separate data connection terminal corresponding to the data transmission line LC and another data connection terminal composed of the first terminal and the second terminal, and all of these structures are connected together, so that the track light assembly 20 can be installed and operated normally without distinguishing the direction and polarity regardless of the three-wire or four-wire rail. Of course, the positions, shapes and configurations of the terminals in the data transceiver SR of the track light assembly 20 may be correspondingly set according to the difference in positions, shapes and configurations of the data transmission lines in the track, so that the connection between the data transceiver SR and the data transmission lines can be formed after the track light assembly 20 is installed.
Fig. 3 is a schematic structural view of a track lighting device according to another embodiment of the present application. Referring to fig. 3, the track lighting device includes a track 10, and a first track light assembly 20A and at least two second track light assemblies 20B mounted on the track 10. Wherein the track 10 comprises: a track power supply 11, a positive power supply voltage line LA supplied with a positive power supply voltage signal by the track power supply 11, a negative power supply voltage line LB supplied with a negative power supply voltage signal by the track power supply 11, and a data transmission line LC provided inside the track 10. Wherein the positive power supply voltage line LA is connected to the positive power supply end of the first track assembly 20A and each second track assembly 20A, respectively, and the negative power supply voltage line LB is connected to the negative power supply end of the first track assembly 20A and each second track assembly 20A, respectively, such that the track power supply 11 supplies power to the first track assembly 20A and each second track assembly 20A; the first track assembly 20A and the data transceiver end of each second track assembly 20A are connected together by a data transmission line LC in the track 10.
Fig. 4 is a schematic circuit configuration diagram of a first track lamp assembly and a second track lamp assembly in the track lighting device shown in fig. 3. Referring to fig. 4, each of the first and second track lamp assemblies 20A and 20B has an internal structure of the track lamp assembly 20 as shown in fig. 2 (a component part including a control circuit in the track lamp assembly is omitted in fig. 4), and further includes a rectifying circuit 24 provided between the data transmitting circuit 21 and the positive power supply terminal U1. The rectifying circuit 24 has a first input terminal (one terminal connected to the positive power supply terminal U1 in fig. 4) and a second input terminal (one terminal connected to the negative power supply terminal U0 in fig. 4) for inputting a voltage, and a first output terminal and a second output terminal for outputting a voltage, wherein the first output terminal is connected to a first terminal of the first resistor R1 in the data transmitting circuit 21, and the second output terminal is connected to a common terminal of the track lamp assembly (the first common terminal PGND of the first track lamp assembly 20A or the second common terminal SGND of the second track lamp assembly 20B). As an example, the rectifying circuit 24 in fig. 4 includes a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4; the first input end of the rectifying circuit 24 is connected to the anode of the first diode D1 and the cathode of the fourth diode D4, the second input end of the rectifying circuit 24 is connected to the anode of the second diode D2 and the cathode of the third diode D3, the first output end of the rectifying circuit 24 is connected to the cathode of the first diode D1 and the cathode of the second diode D2, and the second output end of the rectifying circuit 24 is connected to the anode of the third diode D3 and the anode of the fourth diode D4. Based on the arrangement of the rectifying circuit 24, the first track lamp assembly 20A and the second track lamp assembly 20B may not need to distinguish the polarities of the power sources when being installed, because the output voltage of the rectifying circuit 24 between the first output terminal and the second output terminal does not change even if the positive power source terminal U1 is connected to the negative power source terminal U0. In combination with the above-described feature of not requiring distinguishing between data transmission lines, the track light assembly including the above-described rectifying circuit 24 can be formed as a track light assembly that does not require distinguishing between direction and polarity at all at the time of installation, thereby greatly increasing the ease of use of the track lighting device.
With continued reference to fig. 4, the first track lamp assembly 20A in fig. 4 includes a first resistor R1 and a first switching element S1, and the data receiving circuit 22 includes a first zener diode DZ1 and a second resistor R2; the first end of the first resistor R1 is connected to the first output end of the rectifying circuit 24 (i.e. the cathode of the first diode D1), and the second end of the first resistor R1 is connected to the data transceiver SR; the control terminal of the first switching element S1 is connected to the signal output terminal Tx of the control circuit 23, the first terminal of the first switching element S1 is connected to the data receiving terminal SR, the second terminal of the first switching element S1 is connected to the common terminal PGND, the first switching element S1 is a switching element which is disconnected between the first terminal and the second terminal when the voltage at the control terminal is at the first level, and is connected between the first terminal and the second terminal when the voltage at the control terminal is at the second level; the positive electrode of the first zener diode DZ1 is connected with the signal input end Rx of the control circuit 23, and the negative electrode of the first zener diode DZ1 is connected with the data receiving and transmitting end SR; the first end of the second resistor R2 is connected to the signal input end Rx of the control circuit 23, the second end of the second resistor R2 is connected to the common end, and a voltage obtained by multiplying the resistance value of the second resistor R2 by the minimum stabilizing current of the first zener diode DZ1 is within a voltage value range of the first level. As shown in fig. 4, the second track lamp assembly 20B has the same circuit structure as the first track lamp assembly 20A.
Fig. 5 is a schematic diagram of a circuit principle of the track lighting device shown in fig. 4 in which the first track light assembly transmits the second level to the second track light assembly, and fig. 6 is a schematic diagram of a circuit principle of the track lighting device shown in fig. 4 in which the first track light assembly transmits the first level to the second track light assembly.
Referring to fig. 4 and 5, in the process of transmitting the data signal from the first track light assembly 20A to the second track light assembly 20B, when the signal output terminal Tx in the first track light assembly 20A is at the second level (low level), the first switching element S1 in the first track light assembly 20A is in a state that the first terminal is connected to the second terminal, and thus may be equivalently a wire, and the equivalent circuit structure between the positive power terminal U1 and the negative power terminal U0 is as shown in fig. 5, where the resistor Rz is an equivalent resistor in which the first resistors R1 in all track assemblies mounted on the track 10 are connected in parallel. It can be seen that the potential on the data transmission line LC is pulled down by the first switching element S1 to be the same (low level) as the potential at the first common terminal PGND, so that the first zener diode DZ1 in the second track lamp assembly 20B is in a forward biased or reverse biased but not broken down state, so that the potential at the signal input terminal Rx in the second track lamp assembly 20B is pulled down to the second level (low level), thus realizing that the first track lamp assembly 20A transmits the second level to each of the second track lamp assemblies 20B.
Referring to fig. 4 and 6, in the process of transmitting the data signal from the first track lamp assembly 20A to the second track lamp assembly 20B, when the signal output terminal Tx is at the first level (high level) in the first track lamp assembly 20A, the first switching element S1 in the first track lamp assembly 20A is in a state that the first terminal is disconnected from the second terminal, and thus can be equivalently an infinite resistance, and the equivalent circuit structure between the positive power terminal U1 and the negative power terminal U0 is as shown in fig. 6, wherein the resistance Rz is an equivalent resistance in which the first resistors R1 in all track assemblies mounted on the track 10 are connected in parallel. It can be seen that the potential on the data transmission line LC returns to the positive power supply voltage signal (the first level) after the current is limited, and the first zener diode DZ1 is broken down reversely, and the potential at the signal input terminal Rx in the second track lamp assembly 20B is pulled up to the first level (the high level), and the voltage value is equal to the difference between the voltage value on the data transmission line LC and the regulated voltage of the first zener diode DZ1, and is also equal to the product of the regulated current of the first zener diode DZ1 and the resistance value of the second resistor R2 (the common terminal SGND is the potential zero point). In this manner, it is achieved that the first track light assembly 20A transmits a first level to each of the second track light assemblies 20B.
It can be seen that the data transmitting circuit 21 in the embodiment of the present application only includes a resistor and a switching element, and the data receiving short circuit only includes a zener diode and a resistor, so that the track lamp assembly shown in fig. 2 can be implemented under the condition of very simple circuit structure, which is beneficial to simplifying the internal structure, design process and installation process of the track 10 and the track lamp assembly 20, and greatly improving the convenience of use of the wired intelligent track lamp product.
In one example, the second track light assembly shown in fig. 3 further comprises a light emitting circuit (not shown) connected to the light emitting control terminal of the control circuit 23 in the second track light assembly, the light emitting circuit being configured to emit light under the control of a light emitting control signal of the light emitting control terminal; the control circuit 23 in the first track light assembly comprises a processor (not shown) for transmitting a data signal comprising light emission control instructions and switching between a first level and a second level to the at least one second track light assembly via a data transmission line LC in the track when executing the executable instructions, such that the control circuit 23 in the second track light assembly generates the light emission control signal in accordance with the light emission control instructions, and a memory (not shown) for storing the executable instructions of the processor. That is, when the first track assembly 20A is a control host and the second track assemblies 20B are track lamps, the first track assembly 20A can send a lighting control command to each second track assembly 20B based on the data transmission principle, so that each second track assembly 20B can emit light according to the lighting control command, thereby realizing convenient functions such as the voice control switch, the timing switch, the custom condition switch, the light effect switch, and the like.
Fig. 7 is a schematic circuit diagram of a track light assembly according to an embodiment of the present application. Referring to fig. 7, as another possible implementation of the track light assembly, the track light assembly having the internal structure of the track light assembly 20 as shown in fig. 2 may specifically include a data transmitting circuit 21, a data receiving circuit 22, a control circuit 23, a rectifying circuit 24, and a voltage converter circuit 25. The voltage input terminal of the voltage converter circuit 25 is connected to the first output terminal V1 of the rectifying circuit 24, the ground terminal of the voltage converter circuit 25 is connected to the common terminal, and the voltage output terminal VDD of the voltage converter circuit 25 is connected to the control circuit 23, the data transmitting circuit 21 and the data receiving circuit 22, respectively, so that the voltage converter circuit 25 can provide the operating voltage to the control circuit 23, the data transmitting circuit 21 and the data receiving circuit 22.
It should be appreciated that the voltage at the first output terminal V1 of the rectifying circuit 24 is close to or equal to the voltage (48V) at the positive power supply terminal U1, and thus may be higher than the rated operating voltages of the control circuit 23, the data transmitting circuit 21 and the data receiving circuit 22 and cannot be directly used for power supply; the voltage converter circuit 25 is capable of converting the voltage at the first output terminal V1 into the operating voltages of the control circuit 23, the data transmission circuit 21, and the data reception circuit 22 based on the circuit configuration of any one of the DC-DC voltage converters at this time to realize the above-described power supply function. Of course, when the internal circuitry of the track light assembly requires voltages of a plurality of different voltage values, the voltage converter circuit 25 may further comprise further voltage outputs to provide corresponding voltages through the circuit structure of the corresponding DC-DC voltage converter.
Referring to fig. 7, the data transmission circuit 21 in fig. 7 includes a first transistor Q1, a second transistor Q2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7; the first end of the third resistor R3 is connected to the first output end of the rectifying circuit 24, and the second end of the third resistor R3 is connected to the data transceiver SR; a first end of the fourth resistor R4 is connected to the signal output terminal Tx of the control circuit 23, and a second end of the fourth resistor R4 is connected to the gate of the first transistor Q1; a first end of the fifth resistor R5 is connected to the voltage output terminal VDD of the voltage converter circuit 25, and a second end of the fifth resistor R5 is connected to the gate of the first transistor Q1; a first end of the sixth resistor R6 is connected with the grid electrode of the first transistor Q1, and a second end of the sixth resistor R6 is connected with the common end; a first electrode of the first transistor Q1 except the grid electrode is connected with the grid electrode of the second transistor Q2, and a second electrode of the first transistor Q1 except the grid electrode is connected with the common terminal; a first end of the seventh resistor R7 is connected to the voltage output end VDD of the voltage converter circuit 25, and a second end of the seventh resistor R7 is connected to the gate of the second transistor Q2; the first pole of the second transistor Q2 except for the gate is connected to the data transceiver SR, and the second pole of the second transistor Q2 except for the gate is connected to the common terminal. Thus, when the voltage level at the signal output terminal Tx is the first level (high level), the first transistor Q1 operates in the linear region or the saturation region, so that the voltage at the gate of the second transistor Q2 is pulled down to the second level (low level), so that the second transistor Q2 operates in the off region, and the data receiving terminal SR is the positive power supply voltage signal (first level/high level) limited by the third resistor R3; and when the voltage level at the signal output terminal Tx is the second level (low level), the first transistor Q1 operates in the off-region such that the voltage at the gate of the second transistor Q2 is the first level (high level) provided by the voltage output terminal VDD, and thus the second transistor Q2 operates in the linear region or the saturation region such that the voltage at the data receiving and transmitting terminal SR is pulled down to the second level (low level). It can be seen that the above-described circuit configuration realizes the function of the data transmission circuit 21 as described above.
Referring to fig. 7, the data receiving circuit 22 in fig. 7 includes a second zener diode DZ2, a third transistor Q3, a fourth transistor Q4, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, and an eleventh resistor R11; the negative electrode of the second zener diode DZ2 is connected with the data receiving and transmitting end SR, and the positive electrode of the second zener diode DZ2 is connected with the first end of the eighth resistor R8; the second end of the eighth resistor R8 is connected with the grid electrode of the third transistor Q3; a first end of the ninth resistor R9 is connected with the grid electrode of the third transistor Q3, and a second end of the ninth resistor R9 is connected with the common end; a first end of the tenth resistor R10 is connected to the voltage output terminal VDD of the voltage converter circuit 25, and a second end of the tenth resistor R10 is connected to the gate of the fourth transistor Q4; a first end of the eleventh resistor R11 is connected to the voltage output terminal VDD of the voltage converter circuit 25, and a second end of the eleventh resistor R11 is connected to the signal input terminal Rx of the control circuit 23; a first electrode of the third transistor Q3 except for the grid electrode is connected with the grid electrode of the fourth transistor Q4, and a second electrode of the third transistor Q3 except for the grid electrode is connected with the common terminal; the first pole of the fourth transistor Q4 except for the gate is connected to the signal input terminal Rx of the control circuit 23, and the second pole of the fourth transistor Q4 except for the gate is connected to the common terminal. Thus, when the voltage at the data transceiver SR is at the first level (high level), the second zener diode DZ2 is in a reverse breakdown voltage stabilizing state, so that the third transistor Q3 operates in a linear region or a saturation region, and the voltage of the gate of the fourth transistor Q4 is pulled down to the second level (low level), so that the fourth transistor Q4 operates in a cut-off region, and the signal input Rx is at the first level (high level) provided by the voltage output VDD; when the voltage at the data transceiver SR is at the second level (low level), the second zener diode DZ2 is in a forward biased or reverse biased but not broken down state, the third transistor Q3 operates in the off-region, the first level (high level) provided at the gate of the fourth transistor Q4 for the voltage output terminal VDD, so that the fourth transistor Q4 operates in the linear region or the saturation region, and the voltage at the signal input terminal Rx is pulled down to the second level (low level). It will be seen that the above-described circuit configuration performs the function of the data receiving circuit 22 as described above.
It should be understood that the first and second levels described herein refer to different voltage ranges at the same circuit node, respectively. In one example, the control circuit 23 is configured to determine the level of the voltage at the signal input terminal Rx by comparing the magnitude between the voltage value at the signal input terminal Rx and the reference voltage value. For example, at a voltage of 48V on the positive supply voltage line LA, the voltage of the first level on the data transmission line LC is equal to or close to 48V, and the voltage of the second level on the data transmission line LC is equal to or close to 0V on the negative supply voltage line LB. However, in the circuit configuration of fig. 7, the voltage at the first level at the signal input terminal Rx is close to or equal to the voltage at the first output terminal VDD of the voltage converter circuit 25 (e.g., 15V), and the voltage at the second level at the signal input terminal Rx is close to or equal to the voltage at the common terminal. It can be seen that there may be a difference in the voltage ranges of the first level and the second level for different circuit nodes. In one example, the above reference voltage value may be set to be equal to the sum of the regulated voltage of the second zener diode DZ2 and the gate-on voltage of the third transistor Q3, so that a reference voltage value close to half the voltage of the first level at the input terminal Rx can be achieved, contributing to the improvement of the anti-interference capability and data transmission efficiency of the data transmitting circuit 21 and the data receiving circuit 22.
It should also be appreciated that the third resistor R3 in the above-described example not only serves as a current limiter, but also serves to increase the load carrying capacity of the data transmission line lc—in the case where each of the track light assemblies mounted on the track 10 includes the above-described third resistor R3, the third resistor R3 in each of the track light assemblies is in a parallel relationship between the positive power supply voltage line LA and the data transmission line LC, so that the high-level voltage on the data transmission line LC does not drop into the range of low-level voltage due to an excessive number of track light assemblies being mounted, i.e., a greater number of track light assemblies can be supported for simultaneous mounting on the track 10; the larger the resistance value of the third resistor R3 is, the stronger the loading capacity is, and the setting can be performed according to the application requirement. In addition, the resistance value of the seventh resistor R7 influences the switching speed of the second transistor Q2, and the smaller the resistance value of the seventh resistor R7, the faster the switching speed of the second transistor Q2, and various levels of data transmission rates can be realized according to the device parameters. In one example, the second zener diode DZ2 has a settling voltage that is half of the high level voltage on the data transmission line LC, which can help to increase the sensitivity of the data receiving circuit 22; in addition, the equal ratio of the resistance values of the third resistor R3, the eighth resistor R8 and the ninth resistor R9 can increase the switching speed of the third transistor Q3, and the resistance value of the tenth resistor R10 can adjust the switching speed of the fourth transistor Q4, so that a proper device can be selected according to the application requirement to obtain the required data receiving sensitivity. Likewise, the device parameters may also be adjusted according to the application requirements based on the circuit operating principles described above to achieve a track light assembly that meets the application requirements.
It should be noted that the foregoing embodiments are merely alternative embodiments of the present application, and each of the foregoing implementation manners may be modified appropriately according to practical application requirements. For example, in any of the above circuit structures, any one of the resistors may be implemented by using a plurality of resistors having a series structure and/or a parallel structure, and any one of the capacitors may be implemented by using a plurality of capacitors having a series structure and/or a parallel structure.
The foregoing description of the preferred embodiments is merely exemplary in nature and is not intended to limit the invention, but is intended to cover various modifications, substitutions, improvements, and alternatives falling within the spirit and principles of the invention.

Claims (11)

1. The track lamp assembly is characterized by being arranged on a track, and a positive power supply end, a negative power supply end and a data receiving and transmitting end of the track lamp assembly arranged on the track are respectively connected with a positive power supply voltage line, a negative power supply voltage line and a data transmission line in the track; the track lamp assembly comprises a data sending circuit, a data receiving circuit and a control circuit; wherein, the liquid crystal display device comprises a liquid crystal display device,
the data transmitting circuit is respectively connected with the positive power supply end, the data receiving and transmitting end and the signal output end of the control circuit, and is configured to limit the current of the positive power supply voltage signal when the voltage at the signal output end is at a first level and then provide the positive power supply voltage signal to the data receiving and transmitting end, and provide the voltage signal with the voltage at the second level to the data receiving and transmitting end when the voltage at the signal output end is at the second level; the positive power supply voltage signal is a voltage signal with the voltage provided by the positive power supply end being the first level, and the first level is higher than the second level;
The data receiving circuit is respectively connected with the data receiving and transmitting end and the signal input end of the control circuit, and is configured to set the voltage at the signal input end to the first level when the voltage at the data receiving and transmitting end is the first level and set the voltage at the signal input end to the second level when the voltage at the data receiving and transmitting end is the second level;
the control circuit is configured to supply the signal output terminal with a data signal whose voltage is switched between the first level and the second level during a data transmission period, and to receive the data signal transmitted on the data transmission line by determining a level of the voltage at the signal input terminal during a period other than the data transmission period.
2. The track light assembly of claim 1, wherein the track corresponding to the data transmission line comprises a first data transmission line and a second data transmission line, the data transceiver end of the track light assembly comprising a first terminal for connecting the first data transmission line and a second terminal for connecting the second data transmission line, the first terminal being connected to the second terminal.
3. The track light assembly of claim 1 or 2, further comprising a rectifier circuit disposed between the data transmission circuit and the positive power supply terminal, a first input terminal of the rectifier circuit being connected to the positive power supply terminal, a second input terminal of the rectifier circuit being connected to the negative power supply terminal, a first output terminal of the rectifier circuit being connected to the data transmission circuit, a second output terminal of the rectifier circuit being connected to a common terminal of the track light assembly.
4. The track light assembly of claim 3 wherein the rectifying circuit comprises a first diode, a second diode, a third diode, and a fourth diode; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first input end of the rectifying circuit is respectively connected with the anode of the first diode and the cathode of the fourth diode, the second input end of the rectifying circuit is respectively connected with the anode of the second diode and the cathode of the third diode, the first output end of the rectifying circuit is respectively connected with the cathode of the first diode and the cathode of the second diode, and the second output end of the rectifying circuit is respectively connected with the anode of the third diode and the anode of the fourth diode.
5. The track light assembly of claim 4, wherein the data transmission circuit comprises a first resistor and a first switching element, and the data receiving circuit comprises a first zener diode and a second resistor; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first end of the first resistor is connected with the first output end of the rectifying circuit, and the second end of the first resistor is connected with the data receiving and transmitting end;
the control end of the first switching element is connected with the signal output end of the control circuit, the first end of the first switching element is connected with the data receiving and transmitting end, the second end of the first switching element is connected with the common end, the first switching element is a switching element which is disconnected between the first end and the second end when the voltage at the control end is at the first level, and is connected between the first end and the second end when the voltage at the control end is at the second level;
the positive electrode of the first zener diode is connected with the signal input end of the control circuit, and the negative electrode of the first zener diode is connected with the data receiving and transmitting end;
the first end of the second resistor is connected with the signal input end of the control circuit, the second end of the second resistor is connected with the common end, and the voltage value obtained by multiplying the resistance value of the second resistor and the minimum stable current of the first zener diode is in the voltage value range of the first level.
6. The track light assembly of claim 4, further comprising a voltage converter circuit having a voltage input connected to the first output of the rectifier circuit, a ground connected to the common, and a voltage output connected to the control circuit, the data transmission circuit, and the data reception circuit, respectively, the voltage converter circuit configured to provide an operating voltage to the control circuit, the data transmission circuit, and the data reception circuit.
7. The track light assembly of claim 6, wherein the data transmission circuit comprises a first transistor, a second transistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first end of the third resistor is connected with the first output end of the rectifying circuit, and the second end of the third resistor is connected with the data receiving and transmitting end;
the first end of the fourth resistor is connected with the signal output end of the control circuit, and the second end of the fourth resistor is connected with the grid electrode of the first transistor;
A first end of the fifth resistor is connected with a voltage output end of the voltage converter circuit, and a second end of the fifth resistor is connected with a grid electrode of the first transistor;
a first end of the sixth resistor is connected with the grid electrode of the first transistor, and a second end of the sixth resistor is connected with the common end;
a first electrode of the first transistor except for the grid electrode is connected with the grid electrode of the second transistor, and a second electrode of the first transistor except for the grid electrode is connected with the common terminal;
a first end of the seventh resistor is connected with the voltage output end of the voltage converter circuit, and a second end of the seventh resistor is connected with the grid electrode of the second transistor;
the first pole of the second transistor except the grid electrode is connected with the data receiving and transmitting end, and the second pole of the second transistor except the grid electrode is connected with the common end.
8. The track light assembly of claim 7, wherein the data receiving circuit comprises a second zener diode, a third transistor, a fourth transistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor; wherein, the liquid crystal display device comprises a liquid crystal display device,
the negative electrode of the second zener diode is connected with the data receiving and transmitting end, and the positive electrode of the second zener diode is connected with the first end of the eighth resistor;
The second end of the eighth resistor is connected with the grid electrode of the third transistor;
a first end of the ninth resistor is connected with the grid electrode of the third transistor, and a second end of the ninth resistor is connected with the common end;
a first end of the tenth resistor is connected with a voltage output end of the voltage converter circuit, and a second end of the tenth resistor is connected with a grid electrode of the fourth transistor;
the first end of the eleventh resistor is connected with the voltage output end of the voltage converter circuit, and the second end of the eleventh resistor is connected with the signal input end of the control circuit;
a first electrode of the third transistor except the grid electrode is connected with the grid electrode of the four transistors, and a second electrode of the third transistor except the grid electrode is connected with the common terminal;
a first pole of the fourth transistor except for the grid electrode is connected with the signal input end of the control circuit, and a second pole of the fourth transistor except for the grid electrode is connected with the common end.
9. The track light assembly of claim 8, wherein the control circuit is configured to determine the level of the voltage at the signal input by comparing the magnitude between a voltage value at the signal input and a reference voltage value equal to a sum of a regulated voltage of the second zener diode and a gate-on voltage of the third transistor.
10. A track lighting device, the track lighting device comprising: a track, and at least one track light assembly as claimed in any one of claims 1 to 9 mounted on the track.
11. The track lighting device of claim 10, wherein the track lighting device comprises at least two of the track light assemblies, the at least two track light assemblies comprising a first track light assembly and at least one second track light assembly; wherein, the liquid crystal display device comprises a liquid crystal display device,
the second track light assembly further comprises a light emitting circuit connected to a light emitting control end of a control circuit in the second track light assembly, the light emitting circuit configured to emit light under the control of a light emitting control signal of the light emitting control end;
the control circuit in the first track light assembly includes a processor for transmitting a data signal including a lighting control instruction to the at least one second track light assembly via a data transmission line in the track and switching between the first level and the second level upon execution of the executable instructions to cause the control circuit in the second track light assembly to generate the lighting control signal in accordance with the lighting control instruction, and a memory for storing the executable instructions of the processor.
CN202310473845.1A 2023-04-27 2023-04-27 Track lamp assembly and track lighting device Pending CN116567898A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310473845.1A CN116567898A (en) 2023-04-27 2023-04-27 Track lamp assembly and track lighting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310473845.1A CN116567898A (en) 2023-04-27 2023-04-27 Track lamp assembly and track lighting device

Publications (1)

Publication Number Publication Date
CN116567898A true CN116567898A (en) 2023-08-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310473845.1A Pending CN116567898A (en) 2023-04-27 2023-04-27 Track lamp assembly and track lighting device

Country Status (1)

Country Link
CN (1) CN116567898A (en)

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