Communication circuit, PCB and projection lamp
By integrating the DMX512 communication protocol into the communication circuit, the problems of signal susceptibility to interference and poor interoperability in traditional lighting control systems are solved, enabling long-distance, efficient, and reliable lighting control and ensuring the stable and precise operation of lighting equipment.
Patent Information
- Application Number
- CN202520314053.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-03-17
- Estimated Expiration
- 2035-02-25
AI Technical Summary
In traditional lighting control systems, analog signals are susceptible to interference and have low control precision, while the lack of standardization in digital communication protocols leads to poor interoperability and safety hazards.
The communication circuit based on the DMX512 communication protocol is adopted, including a voltage conversion unit, a control unit and a communication encoding unit. By integrating the third control chip U3, the encoder T1 and the first control chip U1, the signal decoding and transmission are realized, ensuring stability and compatibility.
It achieves long-distance, anti-interference, and high-precision lighting control, ensuring stable operation and accurate control of lighting equipment, and improving the system's safety and scalability.
Smart Images
Figure CN224006847U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of driving circuit technology, and in particular to a communication circuit, PCB board and floodlight. Background Technology
[0002] Traditional lighting control systems typically employ basic analog signals or non-standardized digital communication protocols to control lighting equipment. However, these control methods often come with a series of limitations, such as limited transmission distance, insufficient anti-interference capabilities, and low control precision.
[0003] Taking analog signals as an example, when transmitted over long distances, analog signals are highly susceptible to interference from external noise, which can lead to signal distortion. Signal distortion not only reduces the accuracy of lighting control but may also affect the overall stability of the system, thus negatively impacting the realization of lighting effects. In addition, analog signals may also be affected by environmental factors such as temperature and humidity changes during transmission, further exacerbating the instability and unreliability of the signal.
[0004] In terms of digital communication protocols, the lack of unified standards often prevents devices from different manufacturers from achieving interoperability, which limits the development and application scope of lighting control systems. In addition, non-standardized digital communication protocols often lack sufficient security measures, making the system vulnerable to hacker attacks and increasing the system's security risks.
[0005] It is evident that existing technologies still need improvement and enhancement. Utility Model Content
[0006] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a communication circuit that can accurately decode signals, thereby achieving efficient and reliable control of lighting equipment and ensuring stable operation and precise control of lighting fixtures.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] A communication circuit includes a voltage conversion unit, a control unit, and a communication encoding unit. The input terminal of the voltage conversion unit is used to connect to an external power supply device, and the output terminal of the voltage conversion unit is connected to the power supply terminals of the control unit and the communication encoding unit, respectively. The input terminal of the communication encoding unit is used to connect to an external communication device, and the output terminal of the communication encoding unit is connected to the control unit. The control terminal of the control unit is used to connect to a lighting fixture. The control unit decodes and transmits signals based on the DMX512 communication protocol.
[0009] In the communication circuit described above, the communication encoding unit includes a communication section, a first interface section, and an encoding section. The first interface section is used to connect to an external communication device. The first interface section is connected to the first input terminal and the first output terminal of the communication section and the first input terminal and the first output terminal of the encoding section, respectively. The second output terminal of the communication section and the second output terminal of the encoding section are respectively connected to the input terminal of the control unit. The second input terminal of the communication section and the second output terminal of the encoding section are respectively connected to the output terminal of the control unit. The output terminal of the voltage conversion unit is connected to the power supply terminal of the communication section.
[0010] In the communication circuit, the first interface section includes a first connector J1, pin 1 and pin 2 of the first connector J1 are respectively connected to the first input terminal and the first output terminal of the encoding section; pin 3 and pin 4 of the first connector J1 are respectively connected to the first input terminal and the first output terminal of the communication section.
[0011] In the communication circuit, the communication unit includes a third control chip U3. Pins A and B of the third control chip U3 are connected to pins 4 and 3 of the first connector J1, respectively. Pins R and D of the third control chip U3 are connected to the input and output terminals of the control unit, respectively. Pin VDD of the third control chip U3 is connected to the output terminal of the voltage conversion unit.
[0012] In the communication circuit, the encoding unit includes an encoder T1. Pin 1 of the encoder T1 is connected to pin 2 of the first connector J1 and the output terminal of the control unit, respectively. Pin 2 of the encoder T1 is connected to pin 1 of the first connector J1 and the input terminal of the control unit, respectively.
[0013] In the communication circuit, the control unit includes a first control chip U1 and a second interface section. The QOUT pin of the first control chip U1 is connected to the second output terminal of the encoding section, and the QIN pin of the first control chip U1 is connected to the second input terminal of the encoding section. The TX pin of the first control chip U1 is connected to the second output terminal of the communication section, and the RX pin of the first control chip U1 is connected to the second input terminal of the communication section. The PWM pin of the first control chip U1 is connected to the second interface section, which is used to connect lighting fixtures. The VDD pin of the first control chip U1 is connected to the output terminal of the voltage conversion unit.
[0014] In the communication circuit, the second interface section includes a second connector J2, and pins 2, 3, 4 and 5 of the second connector J2 are respectively connected to pins PWM1, PWM2, PWM3 and PWM4 of the first control chip U1.
[0015] In the communication circuit, the voltage conversion unit includes a second control chip U2. The VIN pin of the second control chip U2 is used to connect to an external power supply device, and the Vout pin of the second control chip U2 is connected to the power supply terminal of the control unit and the power supply terminal of the communication encoding unit, respectively.
[0016] The present invention also provides a PCB board on which any of the above-mentioned communication circuits are printed.
[0017] This utility model also provides a floodlight, which uses the communication circuit described above to achieve communication connection with external devices.
[0018] Beneficial effects:
[0019] This invention provides a communication circuit. The control unit is based on the DMX512 communication protocol to decode and transmit signals. DMX512 is a digital communication protocol with advantages such as long transmission distance, strong anti-interference ability, and high control precision. By accurately decoding the signals through the control unit, efficient and reliable control of lighting equipment can be achieved, ensuring the stable operation and precise operation of lighting fixtures. Attached Figure Description
[0020] Figure 1 A circuit block diagram of the communication circuit provided by this utility model;
[0021] Figure 2 The circuit schematic diagram of the control unit provided by this utility model;
[0022] Figure 3 The circuit diagram of the voltage conversion unit provided by this utility model;
[0023] Figure 4 The circuit diagram of the communication encoding unit provided by this utility model.
[0024] Explanation of key component symbols: 1-Voltage conversion unit, 2-Control unit, 21-Second interface section, 3-Communication encoding unit, 31-Communication section, 32-First interface section, 33-Encoding section. Detailed Implementation
[0025] This utility model provides a communication circuit, a PCB board, and a floodlight. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments.
[0026] In the description of this utility model, the terms "installation" and "connection" should be interpreted broadly. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0027] Please see Figures 1 to 4 This utility model provides a communication circuit, including a voltage conversion unit 1, a control unit 2, and a communication encoding unit 3. The input terminal of the voltage conversion unit 1 is used to connect to an external power supply device, and the output terminal of the voltage conversion unit 1 is connected to the power supply terminals of the control unit 2 and the communication encoding unit 3, respectively. The input terminal of the communication encoding unit 3 is used to connect to an external communication device, and the output terminal of the communication encoding unit 3 is connected to the control unit 2. The control terminal of the control unit 2 is used to connect to a lighting fixture. The control unit 2 implements signal decoding and transmission based on the DMX512 communication protocol.
[0028] This application discloses a communication circuit that integrates a voltage conversion unit 1, a control unit 2, and a communication encoding unit 3 to achieve modularization of the communication function, making the entire circuit structure more compact and easier to install and maintain. The control unit 2 decodes and transmits signals based on the DMX512 communication protocol. DMX512 is a digital communication protocol with advantages such as long transmission distance, strong anti-interference ability, and high control precision. By accurately decoding the signals through the control unit 2, efficient and reliable control of the lighting equipment can be achieved, ensuring the stable operation and precise operation of the lighting fixtures.
[0029] Further, please refer to Figure 1 and Figure 4 The communication encoding unit 3 includes a communication unit 31, a first interface unit 32, and an encoding unit 33. The first interface unit 32 is used to connect to an external communication device. The first interface unit 32 is connected to the first input terminal and the first output terminal of the communication unit 31 and the first input terminal and the first output terminal of the encoding unit 33, respectively. The second output terminal of the communication unit 31 and the second output terminal of the encoding unit 33 are respectively connected to the input terminal of the control unit 2. The second input terminal of the communication unit 31 and the second output terminal of the encoding unit 33 are respectively connected to the output terminal of the control unit 2. The output terminal of the voltage conversion unit 1 is connected to the power supply terminal of the communication unit 31.
[0030] Further, please refer to Figure 4The first interface section 32 includes a first connector J1, pin 1 and pin 2 of the first connector J1 are respectively connected to the first input terminal and the first output terminal of the encoding section 33; pin 3 and pin 4 of the first connector J1 are respectively connected to the first input terminal and the first output terminal of the communication section 31.
[0031] Further, please refer to Figure 4 The communication unit 31 includes a third control chip U3. Pins A and B of the third control chip U3 are connected to pins 4 and 3 of the first connector J1, respectively. Pins R and D of the third control chip U3 are connected to the input and output terminals of the control unit 2, respectively. Pin VDD of the third control chip U3 is connected to the output terminal of the voltage conversion unit 1.
[0032] In this embodiment, the third control chip U3 is model MAX13085EESA. Pins A and B of the third control chip U3 are respectively connected to pins 4 and 3 of the first connector J1 through two parallel voltage divider resistors.
[0033] Further, please refer to Figure 4 The encoding unit 33 includes an encoder T1, with pin 1 of the encoder T1 connected to pin 2 of the first connector J1 and the output terminal of the control unit 2, respectively, and pin 2 of the encoder T1 connected to pin 1 of the first connector J1 and the input terminal of the control unit 2, respectively.
[0034] In this embodiment, the encoder T1 is model ESD05V23T-2A. Pin 1 of the encoder T1 is connected to pin 2 of the first connector J1 through a first varistor F1, and is connected to the output terminal of the control unit 2 through a fourth resistor R4. Pin 2 of the encoder T1 is connected to pin 1 of the first connector J1 through a second varistor F2, and is connected to the input terminal of the control unit 2 through a fifth resistor R5.
[0035] In this embodiment, the communication circuit, through the cooperation of the first interface section 32 and the communication section, achieves efficient docking with external communication devices, improving the compatibility and scalability of the communication circuit. The design of the first interface section 32 facilitates smooth data exchange between the external communication device and the communication section 31 and the encoding section 33, thereby improving communication efficiency. Secondly, the selection of the third control chip U3 and the encoder T1 reflects the strict performance requirements. The MAX13085EESA model third control chip U3 has high-speed data transmission and low power consumption characteristics, and is suitable for a variety of high-speed communication applications. The ESD05V23T-2A model encoder T1 demonstrates excellent encoding performance and anti-interference ability, ensuring the accuracy of data transmission. Finally, by correspondingly setting voltage divider resistors, varistors and resistors, not only is the circuit's protection against external interference enhanced, but the overall stability and security of the circuit are also improved. The addition of these electronic components ensures the stable performance of the communication encoding unit 3 in complex working environments.
[0036] Further, please refer to Figure 1 and Figure 2 The control unit 2 includes a first control chip U1 and a second interface section 21. The QOUT pin of the first control chip U1 is connected to the second output terminal of the encoding section 33, and the QIN pin of the first control chip U1 is connected to the second input terminal of the encoding section 33. The TX pin of the first control chip U1 is connected to the second output terminal of the communication section 31, and the RX pin of the first control chip U1 is connected to the second input terminal of the communication section 31. The PWM pin of the first control chip U1 is connected to the second interface section 21, which is used to connect lighting fixtures. The VDD pin of the first control chip U1 is connected to the output terminal of the voltage conversion unit 1.
[0037] In this embodiment, the first control chip U1 is model GL_DMX01.
[0038] Further, please refer to Figure 2 The second interface section 21 includes a second connector J2, and pins 2, 3, 4 and 5 of the second connector J2 are respectively connected to pins PWM1, PWM2, PWM3 and PWM4 of the first control chip U1.
[0039] In this embodiment, pins PWM1, PWM2, PWM3 and PWM4 of the first control chip U1 are respectively connected to pins 2, 3, 4 and 5 of the two connectors J2 through a resistor. The first control chip U1 outputs PWM signals to adjust the working state of the lighting fixtures connected to it.
[0040] In this embodiment, firstly, the integration of the first control chip U1 enables efficient connection with the encoding unit 33, the communication unit 31, and the second interface unit 21, thereby significantly reducing the number of circuit components and improving the overall integration and compactness of the circuit. Secondly, the design of the second interface unit 21 facilitates the connection and expansion of external devices such as lighting fixtures. At the same time, the modular design also facilitates the maintenance and upgrading of the circuit. Finally, the first control chip U1 uses the standardized model GL_DMX01, ensuring good compatibility of the control unit 2 with other standard devices or systems.
[0041] Further, please refer to Figure 3 The voltage conversion unit 1 includes a second control chip U2. The pin VIN of the second control chip U2 is used to connect to an external power supply device, and the pin Vout of the second control chip U2 is connected to the power supply terminal of the control unit 2 and the power supply terminal of the communication encoding unit 3, respectively.
[0042] In this embodiment, the external power supply device can be a 24V DC power supply device, and the second control chip U2 is model 78M05.
[0043] In this embodiment, the voltage conversion unit 1 performs voltage conversion through the second control chip U2. The 78M05, as a high-performance linear regulator, features a wide input voltage range and low output voltage error. It can stably convert the input voltage into the voltage level required by the control unit 2 and the communication encoding unit 3, ensuring that each unit can work normally and improving the stability and reliability of the entire system. In addition, the voltage provided by the external power supply may fluctuate due to various factors, such as unstable power supply voltage and load changes. The voltage conversion unit 1 can effectively resist these voltage fluctuations through its internal voltage regulation mechanism, ensuring the stability and accuracy of the output voltage, which helps to extend the service life of the circuit and improve the overall performance of the system.
[0044] The present invention also provides a PCB board on which any of the above-mentioned communication circuits are printed.
[0045] This utility model also provides a floodlight, which uses the communication circuit described above to achieve communication connection with external devices.
[0046] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.
Claims
1. A communication circuit, characterized by, The voltage conversion unit, the control unit, the communication coding unit, the input end of the voltage conversion unit is used for connecting external power supply device, the output end of the voltage conversion unit is connected with the power supply end of the control unit and the power supply end of the communication coding unit respectively, the input end of the communication coding unit is used for connecting external communication equipment, the output end of the communication coding unit is connected with the control unit, the control end of the control unit is used for connecting lighting lamps and lanterns; the control unit realizes the decoding and transmission of signals based on DMX512 communication protocol.
2. A communication circuit according to claim 1, characterized in that The communication coding unit includes a communication part, a first interface part and an encoding part, the first interface part is used for connecting external communication equipment, the first interface part is connected with the first input end and the first output end of the communication part and the first input end and the first output end of the encoding part respectively, the second output end of the communication part and the second output end of the encoding part are connected with the input end of the control unit respectively, the second input end of the communication part and the second output end of the encoding part are connected with the output end of the control unit respectively; the output end of the voltage conversion unit is connected with the power supply end of the communication part.
3. A communication circuit according to claim 2, wherein, The first interface part includes a first plug J1, the pin 1 and the pin 2 of the first plug J1 are connected with the first input end and the first output end of the encoding part respectively; the pin 3 and the pin 4 of the first plug J1 are connected with the first input end and the first output end of the communication part respectively.
4. A communication circuit according to claim 3, wherein, The communication part includes a third control chip U3, the pin A and the pin B of the third control chip U3 are connected with the pin 4 and the pin 3 of the first plug J1 respectively; the pin R and the pin D of the third control chip U3 are connected with the input end and the output end of the control unit respectively; the pin VDD of the third control chip U3 is connected with the output end of the voltage conversion unit.
5. A communication circuit according to claim 3, wherein, The encoding part includes an encoder T1, the pin 1 of the encoder T1 is connected with the pin 2 of the first plug J1 and the output end of the control unit respectively, the pin 2 of the encoder T1 is connected with the pin 1 of the first plug J1 and the input end of the control unit respectively.
6. A communication circuit according to claim 2, wherein, The control unit includes a first control chip U1 and a second interface part, the pin QOUT of the first control chip U1 is connected with the second output end of the encoding part, the pin QIN of the first control chip U1 is connected with the second input end of the encoding part; the pin TX of the first control chip U1 is connected with the second output end of the communication part, the pin RX of the first control chip U1 is connected with the second input end of the communication part; the PWM pin of the first control chip U1 is connected with the second interface part, the second interface part is used for connecting lighting lamps and lanterns; the pin VDD of the first control chip U1 is connected with the output end of the voltage conversion unit.
7. A communication circuit according to claim 6, characterised in that, The second interface part includes a second plug J2, the pin 2, 3, 4 and 5 of the second plug J2 are connected with the pin PWM1, the pin PWM2, the pin PWM3 and the pin PWM4 of the first control chip U1 respectively.
8. A communication circuit according to claim 1, wherein, The voltage conversion unit comprises a second control chip U2, a pin VIN of the second control chip U2 is used for connecting an external power supply device, and pins Vout of the second control chip U2 are connected with a power supply end of the control unit and a power supply end of the communication coding unit respectively.
9. A PCB board characterized by, The PCB is printed with the communication circuit according to any one of claims 1-8.
10. A light projector, characterized by The communication connection between the projection lamp and external equipment is realized by using the communication circuit according to any one of claims 1-8.