Lamp panel connecting device

Abstract

The utility model discloses a lamp panel connecting device which comprises a receiving card and a plurality of LED lamp panels, and the receiving card is connected with a control card through a network cable. An MCU module and a first serial port communication module are arranged on the LED lamp panel, and the MCU module is connected with the first serial port communication module; the receiving card is provided with a second serial port communication module corresponding to the first serial port communication module, and the second serial port communication module is connected with the first serial port communication module through a flat cable. The utility model has the characteristics of simple circuit structure, low cost and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to LED lamp panel connection technical field especially relates to a lamp panel connecting device. BACKGROUND

[0002] At present, the signal transmission of LED lamp panel or LED module is generally connected with receiving card through HUB75 interface module (namely a commonly used LED unit board driving interface), and then the receiving card (namely data converter) is connected with control card through network cable, and the control card is used to control LED lamp panel to realize color display function, wherein, LED lamp panels are also connected through HUB75 interface module. At present, the HUB75 interface module needs a plurality of wire harnesses, and 14 signal lines are used to realize the communication connection between LED lamp panels or the communication connection between LED lamp panel and receiving card, however, when one signal line in the above HUB75 interface module is abnormal, it will cause display abnormality, which easily affects the working stability of display screen, meanwhile, the interface pin number is large, the signal line usage amount is large, the circuit cost is high, and the space occupied by LED lamp panel is large, which will increase the cost of electric appliance. SUMMARY

[0003] The utility model wants to solve the technical problem in, provide a kind of lamp panel connecting device, with the characteristics such as simple circuit structure and low cost.

[0004] To solve the above technical problems, the utility model provides a kind of lamp panel connecting device, including receiving card and several LED lamp panels, and the receiving card is connected with control card through network cable;MCU module and first serial communication module are equipped on the LED lamp panel, and the MCU module is connected with the first serial communication module;Second serial communication module corresponding with the first serial communication module is equipped on the receiving card, and the second serial communication module is connected with the first serial communication module through wire harness.

[0005] As the improvement of the above scheme, the second serial communication module corresponding with the first serial communication module is equipped on the receiving card, and the second serial communication module is connected with the first serial communication module of corresponding LED lamp panel through the second serial communication module.

[0006] As the improvement of the above scheme, the first serial communication module and the second serial communication module are both double TTL serial communication modules.

[0007] As the improvement of the above scheme, the double TTL serial communication module includes master serial port and slave serial port, and the master serial port and the slave serial port share a common ground interface, and the master serial port and the slave serial port both include TX interface and RX interface.

[0008] As an improvement of the above-mentioned scheme, the receiving card is connected with the first serial communication module of each of the plurality of LED lamp panels through the second serial communication module.

[0009] As an improvement of the above-mentioned scheme, the first serial communication module and the second serial communication module are RS485 serial communication modules.

[0010] As an improvement of the above-mentioned scheme, the RS485 serial communication module comprises an RS+ interface and an RS- interface.

[0011] As an improvement of the above-mentioned scheme, two second serial communication modules are arranged on the receiving card, and the plurality of LED lamp panels are connected in series through the first serial communication module; the receiving card is connected with the first serial communication module of the first LED lamp panel through one second serial communication module, and the receiving card is connected with the first serial communication module of the last LED lamp panel through the other second serial communication module.

[0012] As an improvement of the above-mentioned scheme, the first serial communication module and the second serial communication module are TTL serial communication modules.

[0013] As an improvement of the above-mentioned scheme, the TTL serial communication module comprises a common ground interface, a TX interface and an RX interface.

[0014] The beneficial effects of the present application are as follows:

[0015] The serial communication module can realize the communication connection between the LED lamp panel and the receiving card, and can also realize the communication connection between the LED lamp panels, the required communication lines are few, the line structure is simple and the cost is low, the working stability of the display screen is high, the number of interface pins of the serial communication module is small, the occupied space of the LED lamp panel is small, and the cost of the electric appliance is relatively low. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of a first embodiment of the lamp panel connecting device of the present application;

[0017] Figure 2 is a circuit connection diagram of the first embodiment of the lamp panel connecting device of the present application;

[0018] Figure 3 is a circuit connection diagram of a second embodiment of the lamp panel connecting device of the present application;

[0019] Figure 4 is a circuit connection diagram of a third embodiment of the lamp panel connecting device of the present application. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model will be described in further detail below in combination with the drawings.

[0021] As Figures 1 to 2 shown, Figures 1 to 2 The utility model discloses a lamp panel connecting device's first embodiment's structure diagram, including receiving card 1 and several LED lamp panels 2, and each LED lamp panel 2 includes a plurality of LED modules;The receiving card 1 is connected with control card 3 through network cable.The LED lamp panel 2 is equipped with MCU module 4 and first serial communication module 5, and the MCU module 4 is connected with the first serial communication module 5;The receiving card 1 is equipped with the second serial communication module 6 corresponding with the first serial communication module 5, and the second serial communication module 6 is connected with the first serial communication module 5 through the wire harness, to realize the communication connection of receiving card 1 and LED lamp panel 2, to realize the communication connection of control card 3 and LED lamp panel 2, and then control LED lamp panel 2 realizes color display function.

[0022] Specifically, the receiving card 1 is equipped with a plurality of the second serial communication module 6, and the second serial communication module 6 is arranged in one-to-one correspondence with the LED lamp panel 2;The receiving card 1 is connected with the first serial communication module 5 of the corresponding LED lamp panel 2 through the second serial communication module 6 respectively, to realize the communication connection of one receiving card 1 and multiple LED lamp panels 2, and be applicable to small pitch product field, such as the display screen formed by the LED lamp panel 2, the spacing between the LED lamp panel 2 is small, and the line cost is low.

[0023] When the receiving card 1 receives the display control instruction of control card 3, the receiving card 1 converts the received Ethernet data format into serial port data format and sends the data to the first serial communication module 5 of the corresponding LED lamp panel 2 according to the serial port configuration, and the LED lamp panel 2 receives the serial port data input by the first serial communication module 5 and realizes the corresponding control function according to the serial port data, such as color display function, to realize the display screen display function.

[0024] Preferably, the first serial port communication module 5 and the second serial port communication module 6 are both dual TTL serial port communication modules, and the dual TTL serial port communication modules include a master serial port and a slave serial port. The master serial port and the slave serial port share a common interface, and both the master serial port and the slave serial port include a TX interface and an RX interface. The receiving card 1 can communicate with the LED light board 2 through the master serial port or the slave serial port, that is, the receiving card 1 can communicate with the LED light board 2 through three signal lines. When an abnormality occurs in the communication of the main serial port, the communication connection can be switched to the slave serial port to improve the stability of data transmission. When the two serial ports send the same data at the same time, serial port transmission redundancy can be achieved, thereby ensuring the reliability and integrity of data transmission.

[0025] Preferably, the model of the MCU module 4 is STM32F407VE, but is not limited thereto.

[0026] like Figure 3 As shown, Figure 3 The schematic diagram of the structure of the second embodiment of the light board connecting device of the utility model is shown. Figure 2 The difference from the first embodiment shown is that the receiving card 1 is connected to the first serial communication modules 5 of the multiple LED light boards 2 via the second serial communication module 6, that is, the receiving card 1 and the LED light boards 2 are connected in parallel. The first serial communication module 5 and the second serial communication module 6 are both RS485 serial communication modules, which include RS+ and RS- interfaces to implement differential signal transmission. The receiving card 1 is connected in parallel with the multiple LED light boards 2 via the half-duplex mode of the RS485 serial communication module, and the MCU module on the LED light board 2 performs address allocation to achieve data transmission.

[0027] This embodiment requires only two signal lines to establish a communication connection between the receiving card 1 and the LED light board 2, resulting in a small number of communication lines, a simple circuit structure, and low cost. Furthermore, the serial communication module has a small number of interface pins, occupies little space on the LED light board 2, and has a relatively low electrical cost. This makes it suitable for applications in large-pitch products, such as information boards (i.e., LED light boards 2) in the transportation sector. For example, if the LED light board 2 is 16x8 in width and height, with a total of 128 points, and 20 LED light boards 2, the corresponding RGB data size is 7680. At a serial port baud rate of 7.5M, a response time of 10ms is required, meeting the information board's application requirement of 30FPS (33.33ms).

[0028] like Figure 4 As shown, Figure 4 The schematic diagram of the structure of the third embodiment of the light board connecting device of the utility model is shown. Figure 2The difference of the first embodiment shown is that two second serial communication modules 6 are arranged on the receiving card 1, and the plurality of LED lamp panels 2 are connected in series through the first serial communication module 5; the receiving card 1 is connected with the first serial communication module 5 of the first LED lamp panel 2 through one second serial communication module 6, and the receiving card 1 is connected with the first serial communication module 5 of the last LED lamp panel 2 through another second serial communication module 6, so as to realize the ring transmission of data.

[0029] Specifically, the receiving card 1 sends the distribution address instruction input by the control card to the MCU module of the first or last LED lamp, and the MCU module of the LED receives the address +1 and forwards it to the MCU module of the next LED lamp panel 2, so as to realize the address distribution and data transmission.

[0030] Preferably, the first serial communication module 5 and the second serial communication module 6 are TTL serial communication modules, and the TTL serial communication module includes a common ground interface, a TX interface and an RX interface, that is, the receiving card 1 can realize the communication connection with the LED lamp panel 2 through three signal lines, and the LED lamp panel 2 can also realize the communication connection through only three signal lines, so that the number of required communication lines is small, the line structure is simple and the cost is low; moreover, the number of interface pins of the serial communication module is small, the space occupied by the LED lamp panel 2 is small, the electrical cost is relatively low, and it can be applied to the field of large spacing products, such as the application scene of the information board (i.e. the LED lamp panel 2) in the transportation field. For example, the width and height of the LED lamp panel 2 are 16x8, a total of 128 points, and there are 10 LED lamp panels 2, and the data size corresponding to RGB is 3840, and the serial port 7.5M baud rate requires 5ms of time, which meets the application requirement of 30FPS (33.33ms) of the information board.

[0031] In summary, the serial communication module can realize the communication connection between the LED lamp panel and the receiving card, and also realize the communication connection between the LED lamp panels, so that the number of required communication lines is small, the line structure is simple and the cost is low; moreover, the number of interface pins of the serial communication module is small, the space occupied by the LED lamp panel is small, the electrical cost is relatively low, and it can be applied to a wide range.

[0032] The above is the preferred embodiment of the utility model, and it should be pointed out that, for ordinary technical personnel in the technical field, some improvements and refinements can be made without departing from the principle of the utility model, and these improvements and refinements are also regarded as the protection range of the utility model.

Claims

1. A light board connection device, characterized by, Including receiving card and several LED lamp boards, the receiving card is connected with the control card through the network cable; The LED lamp board is equipped with MCU module and first serial communication module, the MCU module is connected with the first serial communication module; The receiving card is equipped with the second serial communication module corresponding to the first serial communication module, and the second serial communication module is connected with the first serial communication module through the flat cable.

2. The lamp panel connection device of claim 1, wherein, The receiving card is equipped with multiple second serial communication modules, and the second serial communication modules are one-to-one corresponding to the LED lamp boards. The receiving card is connected with the first serial communication module of the corresponding LED lamp board through the second serial communication module.

3. The lamp panel connection device of claim 2, wherein, The first serial communication module and the second serial communication module are both double TTL serial communication modules.

4. The lamp panel connection device of claim 3, wherein, The double TTL serial communication module includes master serial port and slave serial port, the master serial port and the slave serial port share a common ground interface, and the master serial port and the slave serial port both include TX interface and RX interface.

5. The lamp panel connection device of claim 1, wherein, The receiving card is connected with the first serial communication module of multiple LED lamp boards through the second serial communication module.

6. The lamp panel connection device of claim 5, wherein, The first serial communication module and the second serial communication module are both RS485 serial communication modules.

7. The lamp panel connection device of claim 6, wherein, The RS485 serial communication module includes RS+ interface and RS- interface.

8. The lamp panel connection device of claim 1, wherein, The receiving card is equipped with two second serial communication modules, and multiple LED lamp boards are connected in series through the first serial communication module. The receiving card is connected with the first serial communication module of the first LED lamp board through one second serial communication module, and the receiving card is connected with the first serial communication module of the last LED lamp board through another second serial communication module.

9. The lamp panel connection device of claim 8, wherein, The first serial communication module and the second serial communication module are both TTL serial communication modules.

10. The lamp panel connection device of claim 9, wherein, The TTL serial communication module includes common ground interface, TX interface and RX interface.

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