LED cascade pixel point control circuit

Abstract

The utility model provides an LED cascade pixel point control circuit. Comprising a main control chip module, a Bluetooth onboard antenna module which is electrically connected with a signal receiving and transmitting end of the main control chip module and is used for transmitting and receiving signals outwards, and an LED pixel point control module which is used for controlling on and off of LED pixel points and transmitting pixel point control signals to the cascaded LED pixel point control module, the voltage stabilization input module is used for respectively providing required power for the main control chip module and the Bluetooth onboard antenna module, and the serial port communication module is electrically connected with a signal sending end of the main control chip module and is used for sending signals outwards. According to the LED cascading pixel point control circuit provided by the utility model, transmission from one pixel point control board to the next pixel point control board is carried out in a cascading mode, so that wiring is greatly simplified, and compared with the traditional design that each pixel point needs to be independently connected with a data line, the design greatly reduces the number of required electric wires and the complexity.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to an LED cascade pixel control circuit. Background Art

[0002] At present, LED (light emitting diode) display systems are widely used in various indoor and outdoor display occasions due to their advantages such as high brightness, long life and low power consumption. In order to build larger and higher resolution display screens, a large number of LED pixels need to be arranged and controlled in an orderly manner.

[0003] However, in practice, it is found that traditional LED control systems usually use a one-to-one connection method, such as the SMD built-in IC full-color lamp bead patent No. 201821554044.9, that is, each LED pixel needs a data line to connect to the controller. However, when there are a large number of pixels, this method will lead to problems such as complex wiring, high cost, and difficult maintenance.

[0004] Therefore, it is necessary to provide an LED cascade pixel control circuit to solve the above technical problems. Utility Model Content

[0005] The utility model overcomes the shortcomings of the above-mentioned technology and provides an LED cascade pixel control circuit.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is to provide an LED cascade pixel control circuit, including a main control chip module 1, a Bluetooth onboard antenna module 2 electrically connected to the signal transceiver end of the main control chip module 1 for sending and receiving signals to the outside, an LED pixel control module 4 for controlling the opening and closing of LED pixels and sending pixel control signals to the cascade LED pixel control module 3, a voltage stabilizing input module 5 for providing the required power to the main control chip module 1 and the Bluetooth onboard antenna module 2 respectively, and a serial communication module 6 electrically connected to the signal sending end of the main control chip module 1 for sending signals to the outside;

[0007] Among them, the signal sending end of the main control chip module 1 is electrically connected to the signal receiving end of the LED pixel control module 4, and the signal sending end of the LED pixel control module 4 is electrically connected to the signal receiving end of the cascade LED pixel control module 3.

[0008] In the embodiment, preferably:

[0009] The LED pixel control module 4 includes an LED pixel circuit 41, a first controlled switch circuit 42 for controlling the LED pixel circuit 41 to be turned on to control the LED pixel to light up, and a microcontroller chip circuit 43 for controlling the first controlled switch circuit 42 to be turned on and off and sending the pixel control signal to the cascaded LED pixel control module 3;

[0010] Among them, the signal sending end of the main control chip module 1 is electrically connected to the signal receiving end of the micro-control chip circuit 43, the signal sending end of the micro-control chip circuit 43 is electrically connected to the signal receiving end of the cascade LED pixel control module 3, the control signal output end of the micro-control chip circuit 43 is electrically connected to the first controlled switch circuit 42, and the control signal output end of the first controlled switch circuit 42 is electrically connected to the LED pixel circuit 41.

[0011] In the embodiment, preferably:

[0012] The LED pixel circuit 41 includes a light emitting diode D32, a light emitting diode D33 and a light emitting diode D34 which are arranged in series, the first controlled switch circuit 42 includes an NMOS transistor Q15, and the microcontroller chip circuit 43 includes a microcontroller chip U6 of model FT60F010A;

[0013] The signal sending end of the main control chip module 1 is electrically connected to the signal receiving end of the microcontroller chip U6, the signal sending end of the microcontroller chip U6 is electrically connected to the signal receiving end of the cascaded LED pixel control module 3, the control signal output end of the microcontroller chip U6 is electrically connected to the gate of the NMOS tube Q15 through a resistor R13, the drain of the NMOS tube Q15 is electrically connected to the cathode of the light-emitting diode D34 through a resistor R35, the source of the NMOS tube Q15 is grounded, and the anode of the light-emitting diode D32 is connected to the power supply end.

[0014] In the embodiment, preferably:

[0015] The cascaded LED pixel control module 3 includes a diode series circuit composed of a light-emitting diode D37, a light-emitting diode D38 and a light-emitting diode D39 connected in series, an NMOS tube Q16 for controlling the on-off of the diode series circuit, and a plurality of cascaded microcontroller chips U19 of model FT60F010A;

[0016] Among them, one diode series circuit corresponds to one NMOS tube Q16 and one microcontroller chip U19, the signal receiving end of the first microcontroller chip U19 is electrically connected to the signal sending end of the LED pixel control module 4, the gate of the NMOS tube Q16 is electrically connected to the control signal output end of the microcontroller chip U19 through a resistor R18, the drain of the NMOS tube Q16 is electrically connected to the negative electrode of the diode series circuit through a resistor R36, the source of the NMOS tube Q16 is grounded, and the positive electrode of the diode series circuit is connected to the power supply end.

[0017] In the embodiment, preferably:

[0018] The voltage stabilizing input module 5 includes a three-terminal integrated voltage stabilizer U4 of model 78L05. The power signal input terminal of the three-terminal integrated voltage stabilizer U4 is connected to a 12V power supply, and the power signal output terminal of the three-terminal integrated voltage stabilizer U4 is electrically connected to the power signal input terminal of the main control chip module 1 and the power signal input terminal of the Bluetooth onboard antenna module 2 respectively.

[0019] In the embodiment, preferably:

[0020] The serial port communication module 6 includes a serial interface netPort2 for an external communication device and an NMOS tube Q8 for sending a signal to the outside when turned on. The gate of the NMOS tube Q8 is electrically connected to the signal sending end of the main control chip module 1 through a resistor R10, the drain of the NMOS tube Q8 is electrically connected to the serial interface netPort2, and the source of the NMOS tube Q8 is grounded.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] 1. The LED pixel control module can not only directly control the LED pixels it is connected to, but also forward the processed pixel control signal to the cascaded LED pixel control module. This design allows the system to easily expand the number of LED pixels and achieve a larger-scale display effect.

[0023] 2. By distributing data, that is, transmitting data one by one to the control board corresponding to the pixel point in a cascade form, the burden of a single controller can be reduced to a certain extent and the overall efficiency of the system can be improved.

[0024] 3. Since the pixel control signal of the present application is transmitted from one pixel control board to the next in a cascade manner, the wiring is greatly simplified. Compared with the traditional design in which each pixel needs to be connected to a data line separately, this design greatly reduces the number and complexity of wires required. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a circuit structure principle block diagram of an LED cascade pixel control circuit of the utility model;

[0026] Figure 2 It is a circuit schematic diagram of the main control chip module, Bluetooth onboard antenna module, voltage stabilization input module and serial communication module of the utility model;

[0027] Figure 3 This is a circuit schematic diagram of the LED pixel control module of the utility model;

[0028] Figure 4 It is a circuit schematic diagram of the cascade LED pixel control module of the utility model. DETAILED DESCRIPTION

[0029] The technical solution of the utility model is described in detail below with reference to the drawings.

[0030] See also Figure 1 As shown, the LED cascade pixel control circuit of this embodiment includes a main control chip module 1, a Bluetooth onboard antenna module 2 electrically connected to the signal transceiver end of the main control chip module 1 for sending and receiving signals to the outside, an LED pixel control module 4 for controlling the opening and closing of LED pixels and sending pixel control signals to the cascade LED pixel control module 3, a voltage stabilizing input module 5 for providing required power to the main control chip module 1 and the Bluetooth onboard antenna module 2 respectively, and a serial communication module 6 electrically connected to the signal sending end of the main control chip module 1 for sending signals to the outside;

[0031] Among them, the signal sending end of the main control chip module 1 is electrically connected to the signal receiving end of the LED pixel control module 4, and the signal sending end of the LED pixel control module 4 is electrically connected to the signal receiving end of the cascade LED pixel control module 3.

[0032] In this embodiment, after the Bluetooth onboard antenna module 2 receives the hexadecimal ASCII code of the mobile phone, the data signal can be written into the main control chip module 1 for storage. This efficient data processing capability enables the entire system to quickly respond to external inputs and update the state of the LED pixel points in real time. The main control chip module 1 can then convert it into a binary bit code to obtain a pixel control signal, wherein the state of each pixel point can be independently set as needed, thereby achieving various complex display effects. The main control chip module 1 can then first send the pixel control signal to the LED pixel control module 4, and after the first data in the pixel control signal is extracted by the LED pixel control module 4, it can first be sent to the data latch inside the LED pixel control module 4, and the remaining pixel control signal data can be forwarded and output to the cascaded LED pixel control module 3 through the sending port after being shaped and amplified by the shaping processing circuit inside the LED pixel control module 4, and each time the pixel control signal is transmitted through a pixel control board in the cascaded LED pixel control module 3, the pixel control signal will be reduced by 1 bit.

[0033] In this embodiment, the LED pixel control module 4 can not only directly control the LED pixel points to which it is connected, but also forward the processed pixel control signal to the cascaded LED pixel control module 3. This design allows the system to easily expand the number of LED pixels and achieve a larger-scale display effect.

[0034] In this embodiment, after the main control chip module 1 sends the pixel control signal to the LED pixel control module 4, the corresponding A pixel in the LED pixel control module 4 can choose to light up according to the pixel control signal, and then the remaining pixel control signals can continue to be sent to the cascade LED pixel control module 3, and the other cascaded pixels in the cascade LED pixel control module 3, such as B pixel, C pixel and D pixel, can receive the pixel control signal in turn and choose to light up. Obviously, since each pixel only processes one bit of data, even if a small error or interference occurs during data transmission, it is unlikely to affect the operation of the entire system. In addition, since the signal is shaped and amplified at each pixel, the system is more tolerant to signal attenuation and noise.

[0035] In this embodiment, the present application can reduce the burden of a single controller to a certain extent and improve the overall efficiency of the system by performing distributed processing on data, that is, transmitting data one by one to the control board corresponding to the pixel points in a cascade form.

[0036] In this embodiment, since the pixel control signal of the present application is transmitted from one pixel control board to the next in a cascade manner, the wiring is greatly simplified. Compared with the traditional design in which each pixel needs to be individually connected to a data line, this design greatly reduces the number and complexity of wires required.

[0037] In this embodiment, each pixel point adopts a modular design concept, which allows each pixel point of the system to be independently developed, tested and replaced, so that the system can easily adapt to different application scenarios and requirements.

[0038] Please see Figure 2 As shown, in the embodiments of the present utility model, preferably:

[0039] The voltage regulator input module 5 includes a three-terminal integrated voltage regulator U4 of model 78L05. The power signal input terminal of the three-terminal integrated voltage regulator U4 is connected to a 12V power supply, and the power signal output terminal of the three-terminal integrated voltage regulator U4 is electrically connected to the power signal input terminal of the main control chip module 1 and the power signal input terminal of the Bluetooth onboard antenna module 2.

[0040] In this embodiment, the three-terminal integrated voltage regulator 78L05 has good voltage stabilization performance and can maintain the stability of the output voltage when the input voltage fluctuates, thereby providing a stable and reliable power supply for subsequent modules. The three-terminal integrated voltage regulator has a simple design and a compact internal structure. It is a three-terminal device and is easy to use. It only needs to connect the input, output and ground wires to work. It not only reduces the number of external components, greatly simplifies the circuit design and installation process, reduces the failure rate, and improves the reliability of the system, but also facilitates subsequent debugging and maintenance.

[0041] In this embodiment, after the 12V power input passes through the three-terminal integrated regulator 78L05, the present application can output a stable power supply to meet the power supply needs of subsequent templates, while protecting subsequent circuits such as the main control chip module 1 and the Bluetooth onboard antenna module 2 from damage by unstable voltage, thereby extending their service life.

[0042] In this embodiment, the present application adopts a three-terminal integrated voltage regulator U4 with model number 78L05 as the core component of the voltage stabilization input module 5 to provide a stable and reliable 5V power supply for the main control chip module 1 and the Bluetooth onboard antenna module 2. This is one of the key measures to ensure the normal operation of the entire system and has significant advantages.

[0043] Please see Figure 2 As shown, in the embodiments of the present utility model, preferably:

[0044] The serial communication module 6 includes a serial interface netPort2 for external communication equipment and an NMOS tube Q8 for sending signals to the outside when turned on. The gate of the NMOS tube Q8 is electrically connected to the signal sending end of the main control chip module 1 through a resistor R10, the drain of the NMOS tube Q8 is electrically connected to the serial interface netPort2, and the source of the NMOS tube Q8 is grounded.

[0045] In this embodiment, the NMOS tube Q8 acts as an electronic switch and has the characteristics of fast on and off. When the signal sending end of the main control chip module 1 outputs a high level, the NMOS tube Q8 is quickly turned on, so that the serial interface netPort2 can quickly send signals to the outside. This design ensures the rapid response and efficient transmission of serial port communication. When the NMOS tube Q8 is not turned on, since its source is grounded, no current passes between the drain and the serial interface netPort2, so the entire module is in a low power consumption state. Only when a signal needs to be sent, the NMOS tube Q8 will be turned on, thereby reducing the power consumption of the entire system.

[0046] In this embodiment, the NMOS transistor Q8 can play a certain role in isolation protection. When an external device is connected to the system through the serial interface netPort2, the NMOS transistor Q8 can effectively isolate the electrical connection between the external device and the main control chip module 1, thereby preventing the external device from causing damage to the main control chip module 1.

[0047] Please see Figure 3 As shown, in the embodiments of the present utility model, preferably:

[0048] The LED pixel control module 4 includes an LED pixel circuit 41, a first controlled switch circuit 42 for controlling the LED pixel circuit 41 to turn on to control the LED pixel to light up, and a microcontroller chip circuit 43 for controlling the first controlled switch circuit 42 to turn on and off and sending a pixel control signal to the cascaded LED pixel control module 3;

[0049] Among them, the signal sending end of the main control chip module 1 is electrically connected to the signal receiving end of the micro-control chip circuit 43, the signal sending end of the micro-control chip circuit 43 is electrically connected to the signal receiving end of the cascade LED pixel control module 3, the control signal output end of the micro-control chip circuit 43 is electrically connected to the first controlled switch circuit 42, and the control signal output end of the first controlled switch circuit 42 is electrically connected to the LED pixel circuit 41.

[0050] In this embodiment, the introduction of the first controlled switch circuit 42 enables the on and off of the LED pixel circuit 41 to be precisely controlled by the microcontroller chip circuit 43, thereby avoiding abnormal LED pixels caused by external interference or misoperation. At the same time, the stability and reliability of the microcontroller chip circuit 43 are also guaranteed, thereby improving the reliability of the entire system.

[0051] Please see Figure 3 As shown, in the embodiments of the present utility model, preferably:

[0052] The LED pixel circuit 41 includes a light emitting diode D32, a light emitting diode D33 and a light emitting diode D34 which are arranged in series, the first controlled switch circuit 42 includes an NMOS transistor Q15, and the microcontroller chip circuit 43 includes a microcontroller chip U6 of model FT60F010A;

[0053] The signal sending end of the main control chip module 1 is electrically connected to the signal receiving end of the microcontroller chip U6, the signal sending end of the microcontroller chip U6 is electrically connected to the signal receiving end of the cascaded LED pixel control module 3, the control signal output end of the microcontroller chip U6 is electrically connected to the gate of the NMOS tube Q15 through the resistor R13, the drain of the NMOS tube Q15 is electrically connected to the cathode of the light-emitting diode D34 through the resistor R35, the source of the NMOS tube Q15 is grounded, and the anode of the light-emitting diode D32 is connected to the power supply end.

[0054] In this embodiment, the control signal output end of the microcontroller chip U6 is connected to the gate of the NMOS tube Q15 through a resistor R13. The resistor R13 is used to limit current and prevent voltage mutations from damaging the gate of the NMOS tube. When the microcontroller chip U6 receives a signal from the main control chip module 1, it will decide whether to send a high level or low level signal to the gate of the NMOS tube Q15 according to the logic state of these signals. The NMOS tube Q15 is used as a switch tube to control the current passing through the LED pixel circuit, which can effectively prevent overvoltage or overcurrent from damaging the NMOS tube and improve the reliability of the system. When the gate of the NMOS tube Q15 receives a high level signal, the NMOS tube is turned on and current can pass through, thereby lighting up the LED pixel point, namely, the light-emitting diode D32, the light-emitting diode D33 and the light-emitting diode D34. When the gate of the NMOS tube Q15 receives a low level signal, the NMOS tube is turned off, the current cannot pass, and the LED pixel point is extinguished.

[0055] Please see Figure 4 As shown, in the embodiments of the present utility model, preferably:

[0056] The cascaded LED pixel control module 3 includes a diode series circuit composed of a light-emitting diode D37, a light-emitting diode D38 and a light-emitting diode D39 connected in series, an NMOS tube Q16 for controlling the on-off of the diode series circuit, and a plurality of cascaded microcontroller chips U19 of model FT60F010A;

[0057] Among them, one diode series circuit corresponds to an NMOS tube Q16 and a microcontroller chip U19, the signal receiving end of the first microcontroller chip U19 is electrically connected to the signal sending end of the LED pixel control module 4, the gate of the NMOS tube Q16 is electrically connected to the control signal output end of the microcontroller chip U19 through a resistor R18, the drain of the NMOS tube Q16 is electrically connected to the negative electrode of the diode series circuit through a resistor R36, the source of the NMOS tube Q16 is grounded, and the positive electrode of the diode series circuit is connected to the power supply end.

[0058] In this embodiment, each diode series circuit composed of light-emitting diode D37, light-emitting diode D38 and light-emitting diode D39 corresponds to an NMOS tube Q16 and a microcontroller chip U19, which means that each LED pixel can be independently controlled. This independent control capability enables the LED display system to display more complex and diverse patterns and animations. And by using NMOS tube Q16 as a switch tube, in conjunction with resistors R18 and R36, the current passing through the LED pixel can be effectively controlled, protecting the LED pixel from overcurrent or overvoltage, and improving the reliability of the system.

[0059] In this embodiment, since the microcontroller chip U19 of each pixel can receive and forward data, the system can be easily expanded through cascading to control more pixels. This design is very flexible and pixel control boards can be added or removed as needed.

[0060] In this embodiment, since each pixel only processes one bit of data, that is, the microcontroller chip U19 only processes one bit of data and only receives and forwards data when needed, this design helps to reduce the power consumption of the entire system, which is very important for applications that need to run for a long time or run without an external power supply.

[0061] In this embodiment, the signal receiving end of the first microcontroller chip U19 is electrically connected to the signal sending end of the LED pixel control module 4, so that the cascaded LED pixel control module 3 can be conveniently cascaded with other LED pixel control modules to form a larger-scale LED display system. And because each LED pixel control module 4 is connected to the cascaded LED pixel control module 3 through a data line, the wiring complexity of the system is greatly simplified and the maintainability of the system is improved.

[0062] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure made using the contents of the specification and drawings of the present invention, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An LED cascade pixel control circuit, characterized in that: It comprises a main control chip module (1), a Bluetooth onboard antenna module (2) electrically connected to a signal transceiver end of the main control chip module (1) and used for sending and receiving signals externally, an LED pixel point control module (4) used for controlling the on and off of LED pixels and sending pixel point control signals to a cascaded LED pixel point control module (3), a voltage stabilizing input module (5) used for respectively providing required power to the main control chip module (1) and the Bluetooth onboard antenna module (2), and a serial communication module (6) electrically connected to a signal sending end of the main control chip module (1) and used for sending signals externally; The signal sending end of the main control chip module (1) is electrically connected to the signal receiving end of the LED pixel control module (4), and the signal sending end of the LED pixel control module (4) is electrically connected to the signal receiving end of the cascaded LED pixel control module (3).

2. The LED cascade pixel control circuit according to claim 1, characterized in that: The LED pixel point control module (4) comprises an LED pixel point circuit (41), a first controlled switch circuit (42) for controlling the conduction of the LED pixel point circuit (41) to control the lighting of the LED pixel point, and a microcontroller chip circuit (43) for controlling the on and off of the first controlled switch circuit (42) and sending the pixel point control signal to the cascaded LED pixel point control module (3); The signal sending end of the main control chip module (1) is electrically connected to the signal receiving end of the micro-control chip circuit (43), the signal sending end of the micro-control chip circuit (43) is electrically connected to the signal receiving end of the cascaded LED pixel control module (3), the control signal output end of the micro-control chip circuit (43) is electrically connected to the first controlled switch circuit (42), and the control signal output end of the first controlled switch circuit (42) is electrically connected to the LED pixel circuit (41).

3. The LED cascade pixel control circuit according to claim 2, characterized in that: The LED pixel point circuit (41) includes a light emitting diode D32, a light emitting diode D33 and a light emitting diode D34 which are arranged in series, the first controlled switch circuit (42) includes an NMOS tube Q15, and the microcontroller chip circuit (43) includes a microcontroller chip U6 of model FT60F010A; the signal sending end of the main control chip module (1) is electrically connected to the signal receiving end of the microcontroller chip U6, the signal sending end of the microcontroller chip U6 is electrically connected to the signal receiving end of the cascaded LED pixel point control module (3), the control signal output end of the microcontroller chip U6 is electrically connected to the gate of the NMOS tube Q15 through a resistor R13, the drain of the NMOS tube Q15 is electrically connected to the cathode of the light emitting diode D34 through a resistor R35, the source of the NMOS tube Q15 is grounded, and the anode of the light emitting diode D32 is connected to the power supply end.

4. The LED cascade pixel control circuit according to any one of claims 1 to 3, characterized in that: The cascaded LED pixel control module (3) comprises a diode series circuit in which a light-emitting diode D37, a light-emitting diode D38 and a light-emitting diode D39 are connected in series, an NMOS tube Q16 for controlling the on-off of the diode series circuit, and a plurality of cascaded microcontroller chips U19 of model FT60F010A; Wherein, one diode series circuit corresponds to one NMOS tube Q16 and one microcontroller chip U19, the signal receiving end of the first microcontroller chip U19 is electrically connected to the signal sending end of the LED pixel control module (4), the gate of the NMOS tube Q16 is electrically connected to the control signal output end of the microcontroller chip U19 through a resistor R18, the drain of the NMOS tube Q16 is electrically connected to the negative electrode of the diode series circuit through a resistor R36, the source of the NMOS tube Q16 is grounded, and the positive electrode of the diode series circuit is connected to the power supply end.

5. The LED cascade pixel control circuit according to claim 1, characterized in that: The voltage stabilizing input module (5) includes a three-terminal integrated voltage stabilizer U4 of model 78L05, the power signal input end of the three-terminal integrated voltage stabilizer U4 is connected to a 12V power supply, and the power signal output end of the three-terminal integrated voltage stabilizer U4 is electrically connected to the power signal input end of the main control chip module (1) and the power signal input end of the Bluetooth onboard antenna module (2).

6. The LED cascade pixel control circuit according to claim 1, characterized in that: The serial port communication module (6) comprises a serial interface netPort2 for external communication equipment and an NMOS tube Q8 for sending signals externally when turned on, the gate of the NMOS tube Q8 being electrically connected to the signal sending end of the main control chip module (1) via a resistor R10, the drain of the NMOS tube Q8 being electrically connected to the serial interface netPort2, and the source of the NMOS tube Q8 being grounded.

Images