RS485-based one-site multi-channel LED control device, electronic device and lighting system

Abstract

The utility model discloses a kind of one address multi-channel LED control device, electronic equipment and lighting system based on RS485, comprising: main control module, for processing communication protocol and generating control instruction;RS485 communication module is coupled to the main control module, based on the data exchange of only bus address with host computer;LED drive module is coupled to the main control module, each road is configured as independently driving one or more LED load;Wherein, the main control module is configured as: parsing host computer instruction received by the RS485 communication module, generating control instruction containing channel selection information, and controlling the corresponding specific one or more execution output in the LED drive module. Through the architecture design of one address multi-channel, the structure of LED control device is simplified when multi-channel LED load, effectively reduces the cost of equipment, improves the security and reliability of system.

Description

Technical Field

[0001] This utility model relates to the field of LED control technology, and in particular to a single-address multi-channel LED control device, electronic device and lighting system based on RS485. Background Technology

[0002] RS485 bus is widely used in applications requiring centralized control of a large number of LEDs, such as building lighting, landscape lighting, and large displays, due to its advantages such as long transmission distance, strong anti-interference ability, and support for multi-point connection.

[0003] Currently, traditional RS485 LED control schemes typically adopt a "one address, one channel" model, meaning one RS485 bus address corresponds to one independent LED driver controller, and each controller drives one LED load. In this architecture, controlling N LEDs requires N controllers and N bus addresses. This results in a large number of system nodes, complex wiring, high costs, and reduced overall system reliability, causing inconvenience for installation, debugging, and maintenance. Summary of the Invention

[0004] The purpose of this invention is to provide a single-address multi-channel LED control device, electronic device and lighting system based on RS485, which simplifies the structure of the LED control device when there are multiple LED loads, reduces equipment costs and improves the safety and reliability of the system.

[0005] To solve the above-mentioned technical problems, the present invention provides a technical solution as follows: A one-address multiple-channel LED control device based on RS485, comprising: a main control module for processing communication protocols and generating control commands; an RS485 communication module coupled to the main control module for accessing the RS485 bus and exchanging data with a host computer based on a unique bus address; and an LED driver module coupled to the main control module, each channel being configured to independently drive one or more LED loads; wherein, the main control module is configured to: parse the host computer commands received through the RS485 communication module, generate control commands containing channel selection information, and control one or more corresponding channels in the LED driver module to execute outputs.

[0006] Furthermore, the main control module is further configured to: parse the generated control command containing a current setting value, and control the corresponding channel in the LED driver module to output a constant current at the current specified by the current setting value.

[0007] Furthermore, the LED module is configured to monitor at least one status parameter of each LED driving channel in real time; the main control module is further configured to feed back the status parameters to the host computer through the RS485 communication module.

[0008] Furthermore, the status parameters include at least one of the following: actual output voltage value, current value, no-load state, short-circuit state, and temperature value.

[0009] Furthermore, it also includes a power management module, which is electrically connected to the main control module and the RS485 communication module. The power management module includes a DC-DC BOOST boost circuit, a DC-DC buck circuit, and an LDO low dropout linear regulator, used to provide the required operating voltage for the main control module, the RS485 communication module, and the LED driver module.

[0010] Furthermore, the control command includes a target channel field, which is used to specify one channel or a predefined group of channels in the LED driver module.

[0011] This utility model also provides an electronic device, including any one of the RS485-based LED control devices described above.

[0012] This utility model also provides a lighting system, including a host computer, an RS485 bus controlled by the host computer, and at least one RS485-based one-address multiple-channel LED control device as described in any one of the above, wherein the LED control device is connected to the host computer through the RS485 bus.

[0013] The RS485-based single-address multi-channel LED control device, electronic equipment, and lighting system provided by this utility model, compared with the prior art, achieves control of multiple LED loads by using the RS485 protocol to connect the RS485 communication module and the main control module, and the LED driver module coupled with the main control module. This forms a powerful network node, simplifying the structure of the LED control device in the case of multiple LED loads, and helping to reduce the total number of RS485 nodes required in complex lighting systems, as well as wiring and installation costs. At the same time, the reduction in the number of system nodes also reduces communication failure points and hardware failure points, improving the overall safety and reliability of the system. The control commands generated by the main control module, which include channel selection information, enable flexible control of the LED loads. In particular, the control commands parsed and generated by the main control module include both channel selection information and current setpoints, enabling independent switching and constant current adjustment of each LED load. Especially through the LED driver module, the status parameters of each LED driver channel are monitored in real time and status feedback is provided, effectively increasing the accuracy of LED control and the safety of the system. Attached Figure Description

[0014] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the figures in the drawings do not constitute a limitation on scale.

[0015] Figure 1 This is a block diagram illustrating the working principle of the RS485-based one-address multiple-channel LED control device in this embodiment of the present invention.

[0016] Explanation of reference numerals in the attached diagram: 1. RS485 communication module; 2. Main control module; 3. LED driver module; 4. Power management module. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0018] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0019] like Figure 1 As shown, one embodiment of this utility model relates to a one-address multiple-channel LED control device based on RS485, comprising: a main control module 2, used for processing communication protocols and generating control commands; an RS485 communication module 1, coupled to the main control module 2, used for accessing the RS485 bus and exchanging data with a host computer based on a unique bus address; the RS485 communication module 1 adopts a standard RS485 transceiver chip and is connected to the bus through RS485A and RS485B differential signal lines. The main control module 2 can be a microcontroller (MCU) connected to the RS485 transceiver via a UART interface.

[0020] LED driver module 3 is coupled to the main control module 2. Each channel is configured to independently drive one or more LED loads. In one example, the control instruction includes a target channel field to specify one channel or a predefined channel group in the LED driver module 3. The LED driver module 3 consists of multiple mutually isolated constant current drive circuits. Each circuit can be built from a dedicated LED driver IC. Its control terminal is controlled by different I / O ports of the MCU or by PWM signals.

[0021] The main control module 2 is configured to: parse the host computer instructions received through the RS485 communication module 1, generate control instructions containing channel selection information, and control one or more corresponding channels in the LED driver module 3 to perform output. Preferably, the main control module 2 is further configured to: parse the generated control instructions containing a current setting value, and control the corresponding channel in the LED driver module 3 to perform constant current output with the current specified by the current setting value.

[0022] One embodiment involves an RS485-based one-address multiple-channel LED control device, which further includes a power management module 4 electrically connected to the main control module 2 and the RS485 communication module 1, for providing operating voltage to various circuits within the system. The power management module 4 receives an external DC power input, boosts the voltage to the high voltage required to drive the LEDs via a DC-DC BOOST circuit, generates the 5V or 3.3V voltage required by the MCU and peripheral circuits via a DC-DC buck circuit, and provides a cleaner power supply to noise-sensitive critical circuits via an LDO. Preferably, the power management module 4 includes a DC-DC BOOST circuit, a DC-DC buck circuit, and an LDO low-dropout linear regulator, for providing the required operating voltage to the main control module 2, the RS485 communication module 1, and the LED driver module 3.

[0023] In one embodiment, an RS485-based one-address multiple-channel LED control device is involved. The LED driver module 3 is further configured to monitor at least one status parameter of each LED driver channel in real time. The status parameters include: actual output voltage value, current value, no-load state, short-circuit state, and temperature value. The main control module 2 feeds back at least one status parameter to the host computer through the RS485 communication module 1. In one example, the LED driver module 3 integrates a precision resistor for sampling the current of each channel, a voltage comparator for detecting no-load and short-circuit states, and a temperature sensor for acquiring temperature values. The temperature sensor is a thermistor or a temperature sensing circuit integrated in the driver IC.

[0024] The working principle of this invention is as follows: The host computer sends a command to the unique address of this device via an RS485 bus. This command includes channel selection information, specifying one channel or a group of channels through the target channel field, and may include a current setting value. After the main control module 2 parses and generates the control command, it precisely controls the corresponding specific channel in the LED driver module 3 to execute the output, achieving high-precision constant current output. At the same time, the LED driver module 3 reports the status parameters of each channel to the main control module 2 in real time. The main control module 2 can then transmit this status information back to the host computer via the RS485 communication module 1, realizing closed-loop control and fault diagnosis.

[0025] In one example, the operating state is as follows: The main control module 2 has a unique RS485 address pre-stored. When it receives a command from the host computer, such as "Channel 2, current 350mA", the main control module 2 will parse the target channel as 2 according to the communication protocol and set the current to 350mA. Subsequently, the main control module 2 will precisely control the second LED driver circuit through the corresponding I / O port or PWM output control command to make it output a constant current of 350mA. At the same time, the main control module 2 continuously monitors the feedback signals of each channel. Once an abnormality is detected in a channel, such as a short circuit in the second channel, it will immediately take protective measures, such as shutting down the output of that channel, and can report the "Channel 2 short circuit" fault information to the host computer through the RS485 bus.

[0026] One embodiment relates to an electronic device that uses the aforementioned RS485-based one-address multiple-channel LED control device as a core component, assembles a housing structure, and forms a functional electronic device for driving multiple LED loads.

[0027] One embodiment relates to a lighting system, including a host computer and an RS485 bus controlled by the host computer, and also includes at least one RS485-based LED control device as described above. The LED control device is connected to the host computer via the RS485 bus to realize remote management of the LED load.

[0028] This invention provides a multi-channel LED control device, electronic device, and lighting system based on RS485. By using the RS485 protocol to connect the RS485 communication module and the main control module, along with an LED driver module coupled to the main control module, it achieves control of multiple LED loads, forming a powerful network node. This simplifies the structure of the LED control device in multi-channel LED load scenarios, reducing the total number of RS485 nodes required in complex lighting systems, as well as wiring and installation costs. Simultaneously, the reduced number of system nodes decreases communication and hardware failure points, improving the overall system safety and reliability. Flexible control of the LED loads is achieved through control commands generated by the main control module, which include channel selection information. In particular, the control commands parsed and generated by the main control module include both channel selection information and current setpoints, enabling independent switching and constant current adjustment for each LED load. Furthermore, the LED driver module monitors the status parameters of each LED driver channel in real time and provides status feedback, effectively increasing the accuracy of LED control and the system's safety.

[0029] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A one-address multiple-channel LED control device based on RS485, characterized in that, include: The main control module (2) is used to process communication protocols and generate control commands; The RS485 communication module (1) is coupled to the main control module (2) for accessing the RS485 bus and exchanging data with the host computer based on a unique bus address. The LED driver module (3) is coupled to the main control module (2), and each channel is configured to independently drive one or more LED loads; The main control module (2) is configured to: parse the host computer instructions received through the RS485 communication module (1), generate control instructions containing channel selection information, and control one or more specific channels in the LED driver module (3) to execute output.

2. The RS485-based one-address multiple-channel LED control device according to claim 1, characterized in that, The main control module (2) is further configured as follows: The generated control command contains a current setting value, and controls the corresponding channel in the LED driver module (3) to output a constant current at the current specified by the current setting value.

3. The RS485-based one-address multiple-channel LED control device according to claim 1 or 2, characterized in that, The LED driver module (3) is configured to monitor at least one status parameter of each LED driver channel in real time; The main control module (2) is further configured to feed back the status parameters to the host computer through the RS485 communication module (1).

4. The RS485-based one-address multiple-channel LED control device according to claim 3, characterized in that, The status parameters include at least one of the following: actual output voltage value, current value, no-load state, short-circuit state, and temperature value.

5. The RS485-based one-address multiple-channel LED control device according to claim 1, characterized in that, It also includes a power management module (4), which is electrically connected to the main control module (2) and the RS485 communication module (1). The power management module (4) includes a DC-DC BOOST boost circuit, a DC-DC buck circuit and an LDO low dropout linear regulator, which are used to provide the required operating voltage for the main control module (2), the RS485 communication module (1) and the LED driver module (3).

6. The RS485-based one-address multiple-channel LED control device according to claim 1, characterized in that, The control command includes a target channel field, which is used to specify one channel or a predefined group of channels in the LED driver module (3).

7. An electronic device, characterized in that, Includes the RS485-based one-address multiple-channel LED control device as described in any one of claims 1 to 6.

8. A lighting system, characterized in that, include: Host computer; The RS485 bus is controlled by the host computer. At least one RS485-based multiplexed LED control device as described in any one of claims 1 to 6 is connected to the host computer via the RS485 bus.

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