Light control system

Abstract

The utility model discloses a light control system. The light control system comprises a controller; the 485 interface chip is provided with a sending enabling port, a first signal input port, an A bus port and a B bus port, and the sending enabling port and the first signal input port are electrically connected with the controller; the three-state bus transceiver is provided with an output enabling port, a second signal input port and a signal output port, the output enabling port and the second signal input port are electrically connected with the controller, and the signal output port is electrically connected with the A bus port or the B bus port; and a first wiring terminal and a second wiring terminal, the A bus port is electrically connected with the first wiring terminal, and the B bus port is electrically connected with the second wiring terminal. According to the embodiment of the invention, the circuit structure can be simplified, and the manufacturing cost can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of control systems, and in particular to a lighting control system. Background Art

[0002] At present, LED drivers include two types, which are driven by differential drive signals or level drive signals. In a lighting control system capable of controlling the above two types of LED drivers, the lighting control system needs to separately configure corresponding wiring terminals for the differential drive signals and the level drive signals, resulting in a complex circuit structure and high manufacturing cost. Utility Model Content

[0003] The following is a summary of the subject matter described in detail herein; this summary is not intended to limit the scope of the claims.

[0004] The present application proposes a lighting control system that can simplify the circuit structure and reduce the manufacturing cost.

[0005] The present application provides a lighting control system, comprising: a controller, used to output a lighting control signal; a 485 interface chip, provided with a transmission enable port, a first signal input port, an A bus port and a B bus port, wherein the transmission enable port and the first signal input port are electrically connected to the controller respectively; the 485 interface chip is used to prohibit the A bus port and the B bus port from outputting signals, or to convert the lighting control signal into a differential drive signal and control the A bus port and the B bus port to output the differential drive signal; wherein the differential drive signal is used to drive a first LED driver; a three-state bus transceiver, provided with an output enable port, a first signal input port, an A bus port and a B bus port, wherein the transmission enable port and the first signal input port are electrically connected to the controller respectively; the 485 interface chip is used to prohibit the A bus port and the B bus port from outputting signals, or to convert the lighting control signal into a differential drive signal and control the A bus port and the B bus port to output the differential drive signal; wherein the differential drive signal is used to drive a first LED driver; An output enable port, a second signal input port and a signal output port, the output enable port and the second signal input port are electrically connected to the controller respectively, and the signal output port is electrically connected to the A bus port or the B bus port; the three-state bus transceiver is used to prohibit the signal output port from outputting a signal, or convert the light control signal into a level drive signal and control the signal output port to output the level drive signal; wherein the level drive signal is used to drive a second LED driver; a first wiring terminal and a second wiring terminal, the A bus port is electrically connected to the first wiring terminal, and the B bus port is electrically connected to the second wiring terminal.

[0006] In some embodiments, the lighting control system further includes a first wiring terminal and a second wiring terminal, the A bus port is electrically connected to the first wiring terminal via a first fuse, and the B bus port is electrically connected to the second wiring terminal via a second fuse.

[0007] In some embodiments, the A bus port is connected to one end of a first resistor, the other end of the first resistor is connected to the first fuse, the A bus port is connected to a supply voltage through the second resistor, the B bus port is connected to one end of a third resistor, the other end of the third resistor is connected to the second fuse, the B bus port is grounded through a fourth resistor, the A bus port is connected to one end of a fifth resistor, the B bus port is connected to the other end of the fifth resistor, and the signal output port is connected to the other end of the first resistor or the other end of the third resistor.

[0008] In some embodiments, the other end of the first resistor is connected to the cathode of a first diode, the anode of the first diode is grounded, and the other end of the third resistor is connected to the cathode of a second diode, the anode of the second diode is grounded.

[0009] In some embodiments, the 485 interface chip is provided with a receive enable port, and the receive enable port is connected to the transmit enable port.

[0010] In some embodiments, the tri-state bus transceiver is provided with a direction control terminal, and the direction control terminal is used to connect a control voltage.

[0011] In some embodiments, there are multiple second signal input ports and multiple signal output ports, and the second signal input ports and the signal output ports are in one-to-one correspondence.

[0012] In some embodiments, there are multiple 485 interface chips, and the signal output port is electrically connected to the A bus port in the corresponding 485 interface chip.

[0013] In some embodiments, at least two of the second signal input ports are electrically connected to each other, and at least two of the signal output ports are electrically connected to each other.

[0014] In some embodiments, the lighting control system further includes a brightness sensor, a temperature sensor, and a humidity sensor, and the brightness sensor, the temperature sensor, and the humidity sensor are electrically connected to the controller respectively.

[0015] The embodiments of the present application include at least the following beneficial effects: by electrically connecting the first signal input port of the 485 interface chip with the controller, the light control signal output by the controller can be converted into a differential drive signal through the 485 interface chip, and the differential drive signal can be output through the A bus port and the B bus port; by electrically connecting the second signal input port of the three-state bus transceiver with the controller, the light control signal output by the controller can be converted into a level drive signal through the three-state bus transceiver, and the level drive signal can be output through the signal output port; on this basis, the signal output port is electrically connected to the A bus port or the B bus port, and the A bus port is electrically connected to the first wiring terminal, and the B bus port is electrically connected to the second wiring terminal, which is equivalent to the signal output port sharing a wiring terminal with the A bus port or the B bus port. The signal output port is electrically connected to one of the wiring terminals. Since the transmission enable port of the 485 interface chip and the output enable port of the three-state bus transceiver are electrically connected to the controller respectively, the 485 interface chip has the ability to prohibit the A bus port and the B bus port from outputting signals, and the three-state bus transceiver has the ability to prohibit the signal output port from outputting signals. Therefore, even if the signal output port shares a wiring terminal with the A bus port or the B bus port, a differential drive signal can be output through the first wiring terminal and the second wiring terminal, and a level drive signal can be output through the wiring terminal electrically connected to the signal output port, thereby ensuring that the lighting control system can effectively control the first LED driver and the second LED driver; the number of wiring terminals is reduced by sharing the wiring terminals, and the protection circuit can also be shared, thereby reducing the manufacturing cost and simplifying the circuit structure.

[0016] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0018] Figure 1 An optional system block diagram of a lighting control system provided in an embodiment of the present application;

[0019] Figure 2 An optional circuit schematic diagram of the 485 interface chip provided in the embodiment of the present application in the first wiring state;

[0020] Figure 3 An optional circuit schematic diagram of the 485 interface chip provided in the embodiment of the present application in the second wiring state;

[0021] Figure 4 An optional circuit schematic diagram of a tri-state bus transceiver provided in an embodiment of the present application;

[0022] Figure 5 An optional circuit schematic diagram of the first wiring terminal and the second wiring terminal provided in the embodiment of the present application;

[0023] Figure 6 Another optional circuit schematic diagram of a tri-state bus transceiver provided in an embodiment of the present application;

[0024] Figure 7 An optional circuit schematic diagram of a second 485 interface chip provided in an embodiment of the present application;

[0025] Figure 8 An optional circuit schematic diagram of a third 485 interface chip provided in an embodiment of the present application;

[0026] Fig. 9 An optional circuit schematic diagram of the fourth 485 interface chip provided in the embodiment of the present application;

[0027] Fig.10 Another optional system block diagram of the lighting control system provided in the embodiment of the present application. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0029] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0032] At present, LED drivers include two types, which are driven by differential drive signals or level drive signals. In a lighting control system capable of controlling the above two types of LED drivers, the lighting control system needs to separately configure corresponding wiring terminals for the differential drive signals and the level drive signals, resulting in a complex circuit structure and high manufacturing cost.

[0033] In order to solve the problem of high manufacturing cost, the present application provides a lighting control system, which includes: a controller, which is used to output a lighting control signal; a 485 interface chip, which is provided with a sending enable port, a first signal input port, an A bus port and a B bus port, and the sending enable port and the first signal input port are electrically connected to the controller respectively; the 485 interface chip is used to prohibit the A bus port and the B bus port from outputting signals, or convert the lighting control signal into a differential drive signal and control the A bus port and the B bus port to output the differential drive signal; wherein the differential drive signal is used to drive a first LED driver; a three-state bus transceiver, which is provided with an output enable port, a second signal input port and a signal output port, and the output enable port and the second signal input port are electrically connected to the controller respectively, and the signal output port is electrically connected to the A bus port or the B bus port; the three-state bus transceiver is used to prohibit the signal output port from outputting signals, or convert the lighting control signal into a level drive signal and control the signal output port to output the level drive signal; wherein the level drive signal is used to drive a second LED driver; a first wiring terminal and a second wiring terminal, and the A bus port is electrically connected to the first wiring terminal, and the B bus port is electrically connected to the second wiring terminal. According to the solution provided by the embodiment of the present application, by electrically connecting the first signal input port of the 485 interface chip to the controller, the light control signal output by the controller can be converted into a differential drive signal through the 485 interface chip, and the differential drive signal can be output through the A bus port and the B bus port. By electrically connecting the second signal input port of the three-state bus transceiver to the controller, the light control signal output by the controller can be converted into a level drive signal through the three-state bus transceiver, and the level drive signal can be output through the signal output port. On this basis, the signal output port is electrically connected to the A bus port or the B bus port, and the A bus port is electrically connected to the first wiring terminal, and the B bus port is electrically connected to the second wiring terminal, which is equivalent to the signal output port sharing a wiring terminal with the A bus port or the B bus port, and the signal output port is electrically connected to the A bus port or the B bus port. One of the wiring terminals is electrically connected, and since the transmission enable port of the 485 interface chip and the output enable port of the three-state bus transceiver are respectively electrically connected to the controller, the 485 interface chip has the ability to prohibit the A bus port and the B bus port from outputting signals, and the three-state bus transceiver has the ability to prohibit the signal output port from outputting signals. Therefore, even if the signal output port shares a wiring terminal with the A bus port or the B bus port, a differential drive signal can be output through the first wiring terminal and the second wiring terminal, and a level drive signal can be output through the wiring terminal electrically connected to the signal output port, thereby ensuring that the lighting control system can effectively control the first LED driver and the second LED driver; the number of wiring terminals is reduced by sharing the wiring terminals, and the protection circuit can also be shared, thereby reducing the manufacturing cost and simplifying the circuit structure.

[0034] The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0035] Reference Figures 1 to 5 , the embodiment of the present application provides a lighting control system, including:

[0036] The controller 100 is used to output a lighting control signal;

[0037] The 485 interface chip 200 is provided with a transmission enable port 210, a first signal input port 220, an A bus port 230 and a B bus port 240. The transmission enable port 210 and the first signal input port 220 are electrically connected to the controller 100 respectively; the 485 interface chip 200 is used to prohibit the A bus port 230 and the B bus port 240 from outputting signals, or convert the light control signal into a differential drive signal and control the A bus port 230 and the B bus port 240 to output the differential drive signal; wherein the differential drive signal is used to drive the first LED driver;

[0038] The tri-state bus transceiver 300 is provided with an output enable port 310, a second signal input port 320 and a signal output port 330. The output enable port 310 and the second signal input port 320 are electrically connected to the controller 100 respectively, and the signal output port 330 is electrically connected to the A bus port 230 or the B bus port 240. The tri-state bus transceiver 300 is used to prohibit the signal output port 330 from outputting a signal, or convert the light control signal into a level driving signal and control the signal output port 330 to output the level driving signal; wherein the level driving signal is used to drive the second LED driver;

[0039] The first wiring terminal 410 and the second wiring terminal 420 , the A bus port 230 is electrically connected to the first wiring terminal 410 , and the B bus port 240 is electrically connected to the second wiring terminal 420 .

[0040] Among them, the controller 100 may be provided with a first control port connected to the transmission enable port 210, and the first control port can output a first enable signal. The first enable signal can be in a high level or a low level state. When the transmission enable port 210 is in a high level state, the 485 interface chip 200 is in a differential signal transmission mode. At this time, the 485 interface chip 200 can output a differential drive signal, and when the transmission enable port 210 is in a low level state, the 485 interface chip 200 will not send a differential signal. At this time, the 485 interface chip 200 prohibits the A bus port 230 and the B bus port 240 from outputting signals.

[0041] The controller 100 may be provided with a second control port connected to the output enable port 310, the second control port can output a second enable signal, the second enable signal can be in a high level or low level state, when the output enable port 310 is in a low level state, the tri-state bus transceiver 300 is in a signal transmission mode, at this time, the tri-state bus transceiver 300 can output a level drive signal, that is, output a TTL drive signal, and when the transmission enable port 210 is in a high level state, the tri-state bus transceiver 300 will not output a signal, at this time, the tri-state bus transceiver 300 prohibits the signal output port 330 from outputting a signal. Specifically, the tri-state bus transceiver 300 can use chips of models such as 74HC245PW and 74LS245.

[0042] It should be noted that the high level and the low level are a voltage range. For example, taking a 5V supply voltage as an example, a voltage value between 3.5V and 5V can be defined as a high level, and a voltage value between 0V and 0.8V can be defined as a low level. It can also be defined as other voltage ranges, which is not limited in the embodiments of the present application.

[0043] in, Figure 2 The signal output port 330 is electrically connected to the A bus port 230. When the signal output port 330 is electrically connected to the A bus port 230, the first terminal 410 is connected to the second LED driver, or the first terminal 410 is connected to the first driving end of the first LED driver, and the second terminal 420 is connected to the second driving end of the first LED driver.

[0044] in, Figure 3 The signal output port 330 is electrically connected to the B bus port 240. When the signal output port 330 is electrically connected to the B bus port 240, the second terminal 420 is connected to the second LED driver, or the first terminal 410 is connected to the first driving end of the first LED driver, and the second terminal 420 is connected to the second driving end of the first LED driver.

[0045] It can be understood that by electrically connecting the first signal input port 220 of the 485 interface chip 200 with the controller 100, the light control signal output by the controller 100 can be converted into a differential drive signal through the 485 interface chip 200, and the differential drive signal can be output through the A bus port 230 and the B bus port 240. By electrically connecting the second signal input port 320 of the tri-state bus transceiver 300 with the controller 100, the light control signal output by the controller 100 can be converted into a level drive signal through the tri-state bus transceiver 300, and the level drive signal can be output through the signal output port 330. On this basis, the signal output port 330 is electrically connected to the A bus port 230 or the B bus port 240, and the A bus port 230 is electrically connected to the first wiring terminal 410, and the B bus port 240 is electrically connected to the second wiring terminal 420, which is equivalent to the signal output port 330 sharing a wiring terminal with the A bus port 230 or the B bus port 240. The signal output port 330 is electrically connected to one of the wiring terminals. Since the transmission enable port 210 of the 485 interface chip 200 and the output enable port 310 of the three-state bus transceiver 300 are electrically connected to the controller 100 respectively, the 485 interface chip 200 has the ability to prohibit the A bus port 230 and the B bus port 240 from outputting signals, and the three-state bus transceiver 300 has the ability to prohibit the signal output port 330 from outputting signals. Therefore, even if the signal output port 330 shares a wiring terminal with the A bus port 230 or the B bus port 240, a differential drive signal can be output through the first wiring terminal 410 and the second wiring terminal 420, and a level drive signal can be output through the wiring terminal electrically connected to the signal output port 330, thereby ensuring that the lighting control system can effectively control the first LED driver and the second LED driver; the number of wiring terminals can be reduced by sharing the wiring terminals, and the protection circuit can also be shared, thereby reducing the manufacturing cost and simplifying the circuit structure.

[0046] For example, the controller 100 can control the transmit enable port 210 of the 485 interface chip 200 to be in a high level state and the output enable port 310 to be in a high level state. At this time, the lighting control system can output a differential drive signal to the wiring terminal through the 485 interface chip 200, and then drive the first LED driver through the differential drive signal. The first LED driver can drive the first lamp to work.

[0047] For another example, the controller 100 can control the transmit enable port 210 of the 485 interface chip 200 to be in a low level state and the output enable port 310 to be in a low level state. At this time, the lighting control system can output a level driving signal to the wiring terminal through the three-state bus transceiver 300, and then drive the second LED driver through the level driving signal. The second LED driver can drive the second lamp to work.

[0048] It can be seen that the first LED driver and the second LED driver are of different types. The first LED driver is driven by a differential driving signal, and the second LED driver is driven by a level driving signal.

[0049] In addition, refer to Figure 2 , Figure 3 and Figure 5 In certain embodiments of the present application, the lighting control system further includes a first terminal 410 and a second terminal 420 , the A bus port 230 is electrically connected to the first terminal 410 via a first fuse 510 , and the B bus port 240 is electrically connected to the second terminal 420 via a second fuse 520 .

[0050] Based on this, since the A bus port 230 is electrically connected to the first wiring terminal 410 through the first fuse 510, when the output current of the A bus port 230 is too large, the first fuse 510 will melt and disconnect the circuit, which can avoid the output current of the A bus port 230 being too large; since the B bus port 240 is electrically connected to the second wiring terminal 420 through the second fuse 520, when the output current of the B bus port 240 is too large, the second fuse 520 will melt and disconnect the circuit, which can avoid the output current of the B bus port 240 being too large. Therefore, the circuit can be effectively protected by the first fuse 510 and the second fuse 520.

[0051] In addition, since the signal output port 330 is electrically connected to the A-bus port 230 or the B-bus port 240, the signal output port 330 and the A-bus port 230 or the B-bus port 240 can share a fuse. When the signal output port 330 is electrically connected to the A-bus port 230, it is equivalent to that the signal output port 330 is also electrically connected to the first connection terminal 410 through the first fuse 510. Similar to the A-bus port 230, when the output current of the signal output port 330 is too large, the first fuse 510 will melt and disconnect the circuit, which can prevent the output current of the signal output port 330 from being too large. When the signal output port 330 is electrically connected to the B-bus port 240, it is equivalent to that the signal output port 330 is also electrically connected to the second connection terminal 420 through the second fuse 520. Similar to the B-bus port 240, when the output current of the signal output port 330 is too large, the second fuse 520 will melt and disconnect the circuit, which can prevent the output current of the signal output port 330 from being too large. By sharing fuses to reduce the number of fuses, the circuit structure can be further simplified, thereby further reducing the manufacturing cost.

[0052] Specifically, the parameters of the first fuse 510 and the second fuse 520 are both 50MA / 60V.

[0053] In addition, refer to Figure 2 , Figure 3 and Figure 5 In certain embodiments of the present application, the A bus port 230 is connected to one end of a first resistor R8, the other end of the first resistor R8 is connected to the first fuse 510, the A bus port 230 is connected to the power supply voltage through the second resistor Rb66, the B bus port 240 is connected to one end of a third resistor R1, the other end of the third resistor R1 is connected to the second fuse 520, the B bus port 240 is grounded through a fourth resistor Rb65, the A bus port 230 is connected to one end of a fifth resistor R2, the B bus port 240 is connected to the other end of the fifth resistor R2, and the signal output port 330 is connected to the other end of the first resistor R8 or the other end of the third resistor R1.

[0054] Based on this, a first resistor R8 is connected in series between the A bus port 230 and the first fuse 510. The first resistor R8 can reduce the current in the loop to avoid excessive current. The A bus port 230 is connected to the power supply voltage through the second resistor Rb66. The power supply voltage can be +5V. The second resistor Rb66 is used as a bias resistor to provide a suitable bias voltage for the 485 interface chip 200 to ensure that the 485 interface chip 200 can correctly identify the logic high level in the idle state to avoid erroneous data analysis. A third resistor R1 is connected in series between the B bus port 240 and the second fuse 520. The third resistor R1 can reduce The current in this loop is prevented from being too large; the B bus port 240 is grounded through the fourth resistor Rb65. The fourth resistor Rb65 serves as a bias resistor and can provide a suitable bias voltage for the 485 interface chip 200, ensuring that the 485 interface chip 200 can correctly identify the logic low level in the idle state, thereby improving the robustness of the signal; a fifth resistor R2 is connected between the A bus port 230 and the B bus port 240. The fifth resistor R2 can limit the voltage difference between the A bus port 230 and the B bus port 240, effectively protecting the 485 interface chip 200 from being damaged by excessive voltage, thereby improving the reliability of the circuit.

[0055] In some embodiments of the present application, the signal output port 330 is electrically connected to the A bus port 230 or the B bus port 240 via a voltage-dropping resistor, so as to protect the circuit.

[0056] In addition, refer to Figure 2 and Figure 3 In some embodiments of the present application, the other end of the first resistor R8 is connected to the cathode of the first diode D26, the anode of the first diode D26 is grounded, and the other end of the third resistor R1 is connected to the cathode of the second diode D25, the anode of the second diode D25 is grounded.

[0057] Based on this, by providing the first diode D26 and the second diode D25, a reverse protection function can be achieved to prevent the voltage from flowing to the wiring terminal, thereby protecting the components in the lighting control system and extending the service life.

[0058] In addition, refer to Figure 2 and Figure 3 In some embodiments of the present application, the 485 interface chip 200 is provided with a receive enable port 250 , and the receive enable port 250 is connected to the transmit enable port 210 .

[0059] It is understandable that when the receive enable port 250 is in a low level state, the 485 interface chip 200 is in a mode of receiving differential signals, and when the receive enable port 250 is in a high level state, the 485 interface chip 200 does not receive differential signals.

[0060] Based on this, since the receive enable port 250 is connected to the transmit enable port 210, when the transmit enable port 210 is in a high level state, the receive enable port 250 will also be in a high level state, that is, when the 485 interface chip 200 is in the mode of sending differential signals, the 485 interface chip 200 will not receive differential signals, which can ensure the normal operation of the lighting control system.

[0061] In addition, refer to Figure 4 In some embodiments of the present application, the tri-state bus transceiver 300 is provided with a direction control terminal 340, and the direction control terminal 340 is used to connect a control voltage.

[0062] It should be noted that the control voltage can be set to +5V, so that the direction control terminal 340 is in a high level state. When the direction control terminal 340 is in a high level state, the second signal input port 320 is in a signal input state, and the signal output port 330 is in a signal output state.

[0063] Based on this, by setting the control voltage of the direction control terminal 340, the second signal input port 320 is in a signal input state, and the signal output port 330 is in a signal output state, which can ensure the normal operation of the lighting control system.

[0064] In addition, refer to Figure 6 In some embodiments of the present application, there are multiple second signal input ports 320 and signal output ports 330 , and the second signal input ports 320 and the signal output ports 330 are in one-to-one correspondence.

[0065] Based on this, by providing a plurality of second signal input ports 320 and signal output ports 330 , a plurality of second LED drivers can be driven simultaneously, thereby improving the control effect of the lighting control system.

[0066] In addition, refer to Figures 6 to 9 In some embodiments of the present application, there are multiple 485 interface chips 200 , and the signal output port 330 is electrically connected to the A bus port 230 in the corresponding 485 interface chip 200 .

[0067] Specifically, each 485 interface chip 200 may correspond to two signal output ports 330 , and therefore, every two signal output ports 330 are electrically connected to the A bus port 230 in the same 485 interface chip 200 .

[0068] Based on this, by setting up multiple 485 interface chips 200, multiple first LED drivers can be driven simultaneously to improve the control effect of the lighting control system; in addition, the signal output port 330 is electrically connected to the A bus port 230 in the corresponding 485 interface chip 200, which can reduce the number of wiring terminals and share the protection circuit, thereby reducing the manufacturing cost and simplifying the circuit structure.

[0069] In addition, refer to Fig. 9 In some embodiments of the present application, at least two second signal input ports 320 are electrically connected to each other, and at least two signal output ports 330 are electrically connected to each other.

[0070] Based on this, by short-circuiting two or more second signal input ports 320, the input strength of the signal can be enhanced. By short-circuiting two or more signal output ports 330, the output strength of the signal can be enhanced.

[0071] In addition, refer to Fig.10 In certain embodiments of the present application, the lighting control system further includes a brightness sensor 610 , a temperature sensor 620 , and a humidity sensor 630 , and the brightness sensor 610 , the temperature sensor 620 , and the humidity sensor 630 are electrically connected to the controller 100 , respectively.

[0072] The brightness sensor 610 can detect brightness information of the environment where the lamp is located, the temperature sensor 620 can detect temperature information of the environment where the lamp is located, and the humidity sensor 630 can detect humidity information of the environment where the lamp is located.

[0073] Based on this, by detecting brightness information, temperature information and humidity information, the controller 100 can determine the lighting environment state of the lamp, so as to select a suitable control effect, and the controller 100 can send a suitable lighting control signal.

[0074] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. A lighting control system, characterized in that: include: A controller, used for outputting a lighting control signal; A 485 interface chip is provided with a transmission enable port, a first signal input port, an A bus port and a B bus port, wherein the transmission enable port and the first signal input port are electrically connected to the controller respectively; The 485 interface chip is used to prohibit the A bus port and the B bus port from outputting signals, or convert the light control signal into a differential drive signal and control the A bus port and the B bus port to output the differential drive signal; wherein the differential drive signal is used to drive the first LED driver; A three-state bus transceiver is provided with an output enable port, a second signal input port and a signal output port, wherein the output enable port and the second signal input port are electrically connected to the controller respectively, and the signal output port is electrically connected to the A bus port or the B bus port; the three-state bus transceiver is used to prohibit the signal output port from outputting a signal, or convert the light control signal into a level drive signal and control the signal output port to output the level drive signal; wherein the level drive signal is used to drive the second LED driver; A first wiring terminal and a second wiring terminal, the A bus port is electrically connected to the first wiring terminal, and the B bus port is electrically connected to the second wiring terminal.

2. A lighting control system according to claim 1, characterized in that: The A bus port is electrically connected to the first wiring terminal through a first fuse, and the B bus port is electrically connected to the second wiring terminal through a second fuse.

3. A lighting control system according to claim 2, characterized in that: The A bus port is connected to one end of a first resistor, the other end of the first resistor is connected to the first fuse, the A bus port is connected to a supply voltage through a second resistor, the B bus port is connected to one end of a third resistor, the other end of the third resistor is connected to the second fuse, the B bus port is grounded through a fourth resistor, the A bus port is connected to one end of a fifth resistor, the B bus port is connected to the other end of the fifth resistor, and the signal output port is connected to the other end of the first resistor or the other end of the third resistor.

4. A lighting control system according to claim 3, characterized in that: The other end of the first resistor is connected to the cathode of the first diode, the anode of the first diode is grounded, and the other end of the third resistor is connected to the cathode of the second diode, the anode of the second diode is grounded.

5. A lighting control system according to claim 1, characterized in that: The 485 interface chip is provided with a receiving enable port, and the receiving enable port is connected to the sending enable port.

6. A lighting control system according to claim 1, characterized in that: The tri-state bus transceiver is provided with a direction control terminal, and the direction control terminal is used to connect a control voltage.

7. A lighting control system according to claim 1, characterized in that: There are multiple second signal input ports and multiple signal output ports, and the second signal input ports correspond to the signal output ports one by one.

8. A lighting control system according to claim 7, characterized in that: There are multiple 485 interface chips, and the signal output port is electrically connected to the A bus port in the corresponding 485 interface chip.

9. A lighting control system according to claim 7, characterized in that: At least two of the second signal input ports are electrically connected to each other, and at least two of the signal output ports are electrically connected to each other.

10. A lighting control system according to claim 1, characterized in that: It also includes a brightness sensor, a temperature sensor and a humidity sensor, and the brightness sensor, the temperature sensor and the humidity sensor are electrically connected to the controller respectively.

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