CN217933125U - LED sending card device with cascaded HDMI - Google Patents

Abstract

The utility model relates to a cascaded LED of HDMI sends out card device, including at least one LED and sends out the card, be provided with HDMI output interface and the HDMI input interface who is used for transmitting video signal and communication signal between the LED card of sending out on the LED card of sending out, HDMI output interface and HDMI input interface realize video signal and communication signal's transmission through redefining two unnecessary pins in the HDMI interface, the LED card of sending out HDMI output interface and next level LED card of sending out HDMI input interface electric connection, the LED card of sending out HDMI input interface electric connection is in upper computer electric connection. This application utilizes redefines two unnecessary pins with the HDMI interface, makes the HDMI interface have the function that can transmit video signal and communication signal, and then unites two into one video interface and communication interface to reduce circuit board interface number, but save the effect in the space of circuit board.

Description

LED sending card device with cascaded HDMI

Technical Field

The utility model belongs to the technical field of the technique of sending card equipment and specifically relates to a cascaded LED of HDMI sends and clamps device is related to.

Background

At present, LED (light emitting diode) display screens are more and more common, and their applications are more and more extensive, and large-screen LED display screens are installed in many places to perform advertisement delivery or display various kinds of propaganda information, such as text titles or videos.

When the LED display screen is used, the LED sends the card, which is an important part of the LED display system, to the necessary hardware equipment. The functions of the LED transmitting card include: receiving an image or video signal sent by a signal source, caching the image or video signal and sending the image or video signal to a receiving card; and is responsible for controlling the whole LED display system. The sending card also needs to have a cascading function. When the maximum image resolution output by the sending card is smaller than the input image resolution, the sending card needs to be cascaded with other sending cards so as to complete the display of the input image. For example, the resolution of the input image is 1920x960, and the maximum output capacity of the transmitting card is 960x960, so that 2 transmitting cards are connected in series to output 1920x960 image, thereby realizing the complete output of the image signal.

In the related art, a plurality of LED sending cards are connected through a video line and a serial port connecting line; the video line is used for transmitting video signals, and the serial port connecting line is used for transmitting cascade control signals, such as control signals for sequencing and accessing each device.

However, the conventional LED transmitting card must have a digital video interface and a serial interface, so that when a plurality of LED transmitting cards are connected, a video line and a serial connection line must be connected at the same time, resulting in occupying a space on a circuit board.

SUMMERY OF THE UTILITY MODEL

In order to improve current LED transmission card and must have a digital video interface and a serial port interface, lead to the phenomenon that occupies the space on the circuit board, the utility model provides a cascaded LED of HDMI sends and clamps the device.

The utility model provides a pair of cascaded LED of HDMI sends card device adopts following technical scheme:

the LED transmitting card device comprises at least one LED transmitting card, wherein an HDMI output interface and an HDMI input interface which are used for transmitting video signals and communication signals between the LED transmitting cards are arranged on the LED transmitting card, the HDMI output interface and the HDMI input interface realize the transmission of the video signals and the communication signals by redefining two unnecessary pins in the HDMI, the HDMI output interface of the LED transmitting card is electrically connected with the HDMI input interface of the next-level LED transmitting card, and the HDMI input interface of the LED transmitting card is electrically connected with an upper computer.

Through adopting above-mentioned technical scheme, the utilization redefines two unnecessary pins in the HDMI interface, makes the HDMI interface have the function that can transmit video signal and communication signal for when HDMI output interface and HDMI input interface are connected, only can transmit video signal and communication signal through an HDMI line, and then unites two into one video interface and communication interface, thereby reduced circuit board interface number, but save the space of circuit board.

Preferably, the LED transmitting card and the next-stage LED transmitting card can realize the cascade connection of the LED transmitting cards through one HDMI interface.

By adopting the technical scheme, the LED transmitting cards of two adjacent stages are connected to the HDMI output interface and the HDMI input interface by only one HDMI line, and the cascade connection of the LED transmitting cards can be completed.

Preferably, the number of cascade connection stages between the LED sending cards is not more than 16.

By adopting the technical scheme, the LED transmitting cards not larger than 16 can be simultaneously cascaded, so that the resolution of output videos of the LED transmitting cards is improved.

Preferably, the HDMI output interface and the HDMI input interface redefine two unnecessary pins in the HDMI interface as a pin number 17 and a pin number 18.

By adopting the technical scheme, the functions of the No. 17 pin and the No. 18 pin of the HDMI interface are realized, so that the HDMI interface has the function of transmitting communication signals and video signals, and the number of the interfaces on the circuit board is reduced.

Preferably, the LED transmitting card is provided with an HDMI looping-out function.

By adopting the technical scheme, the LED sending card can retransmit the video signal to other equipment.

Preferably, the LED transmitting card has a plurality of HDMI input interfaces.

By adopting the technical scheme, the LED transmitting card is provided with the plurality of HDMI input interfaces, so that the LED transmitting card can be simultaneously connected with the plurality of upper computers, and different video signals can be output by selecting the HDMI input interfaces.

Preferably, a communication interface for transmitting a communication signal is arranged in the LED sending card, and the communication interface is a USB interface.

By adopting the technical scheme, the USB interface is common, so that the adaptability of the LED transmitting card is improved.

Preferably, the communication interface may also be a UART or a network interface.

By adopting the technical scheme, the communication interface can also be a UART or a network port, so that the communication interface can select the corresponding interface style according to the HDMI interface style of the upper computer, and the LED transmitting card can be better connected with the upper computer.

In summary, the present application includes at least one of the following beneficial technical effects:

1. redefining two unnecessary pins in the HDMI interface to enable the HDMI interface to have the function of transmitting video signals and communication signals, so that when the LED transmitting cards are mutually cascaded, the video signals and the communication signals can be transmitted only through one HDMI line, and the video interface and the communication interface are combined into a whole, thereby reducing the number of circuit board interfaces and saving the space of a circuit board;

2. and unified control on a plurality of LED sending cards can be realized by only one communication line.

Drawings

Fig. 1 is a signal flow diagram in the present embodiment.

Description of reference numerals: 10. an LED transmitting card; 20. an HDMI input interface; 30. a communication interface; 40. a logic circuit; 50. an HDMI output interface; 60. gigabit network output interface.

Detailed Description

The present application is described in further detail below with reference to fig. 1.

An HDMI cascaded LED transmitting card 10 device, referring to fig. 1, includes a plurality of interconnected LED transmitting cards 10, where the LED transmitting cards 10 are provided with input ends, specifically, the input ends include an HDMI input interface 20 installed on the LED transmitting card 10, and the HDMI input interface 20 is used for electrically connecting with an upper computer, so that the LED transmitting card 10 obtains a video signal from the upper computer. The input end further comprises a communication interface 30 which is arranged on the LED sending card 10 and used for controlling the LED sending card 10, the communication interface 30 is also electrically connected with an upper computer, and the LED sending card 10 obtains a communication signal from the upper computer through the communication interface 30, so that the LED sending card 10 works normally. In this embodiment, there are a plurality of HDMI input interfaces 20, the HDMI input interfaces 20 can be electrically connected to a plurality of upper computers at the same time, the LED transmitter card 10 selects one of the HDMI input interfaces 20 as an input signal, and the communication interface 30 is not limited to a USB interface, a UART interface, and a network interface.

The LED transmitting card 10 is internally installed with a logic circuit 40 for processing video signals, specifically, the logic circuit 40 includes an FPGA chip, and a serial bus is electrically connected between the FPGA chip and the HDMI input interface 20. When the LED transmitting card 10 is connected to an upper computer, the HDMI input interface 20 first acquires a video signal, and the FPGA chip decodes the video signal acquired by the HDMI input interface 20 and then outputs the video signal.

The LED transmitting cards 10 are provided with output terminals, the output terminals include HDMI output interfaces 50 for connecting the LED transmitting cards 10 to each other, and the HDMI output interfaces 50 between two adjacent LED transmitting cards 10 are electrically connected to the HDMI input interface 20 through HDMI wires. The HDMI output interface 50 and the HDMI input interface 20 enable the HDMI to transmit video signals and communication signals by redefining the functions of the pin No. 17 and the pin No. 18 in the HDMI, so that the cascade connection between the multi-level LED transmitter cards 10 can be completed between two adjacent LED transmitter cards 10 through one HDMI cable. In this embodiment, the number of stages of cascade connection between the LED transmitting cards 10 is not more than 16 stages at most.

The output terminal of the LED transmitting card 10 further includes a gigabit network output interface 60 for connecting to an LED display screen, and the fpga chip outputs the decoded video signal to the LED display screen through the gigabit network output interface 60.

In this embodiment, the LED transmitting card 10 further has a loop-out function.

The implementation principle of the application is as follows: when the LED transmitting card 10 is connected, the HDMI input interface 20 and the communication interface 30 on the first-level LED transmitting card 10 are electrically connected to an upper computer, and obtain a video signal and a communication signal from the upper computer respectively. The FPGA chip decodes the video signal obtained by the HDMI input interface 20. Output is performed through the HDMI output interface 50.

When the second-level LED transmitting card 10 is cascaded with the first-level LED transmitting card 10, the HDMI input interface 20 on the second-level LED transmitting card 10 is electrically connected to the HDMI output interface 50 of the first-level LED transmitting card 10 through an HDMI cable, so that the first-level LED transmitting card 10 and the second-level LED transmitting card 10 transmit communication signals and video signals through the HDMI cable, and then are electrically connected to the LED display screen through the gigabit network output interface 60, thereby outputting videos.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. An HDMI-cascaded LED transmitter card arrangement comprising at least one LED transmitter card (10), characterized in that: the LED transmitting card (10) is provided with an HDMI output interface (50) and an HDMI input interface (20) which are used for transmitting video signals and communication signals between the LED transmitting cards (10), the HDMI output interface (50) and the HDMI input interface (20) realize the transmission of the video signals and the communication signals by redefining two unnecessary pins in the HDMI, the HDMI output interface (50) of the LED transmitting card (10) is electrically connected with the HDMI input interface (20) of the next-level LED transmitting card (10), and the HDMI input interface (20) of the LED transmitting card (10) is electrically connected with an upper computer.

2. The HDMI-concatenated LED transmitter card device of claim 1, wherein: the LED sending card (10) and the next-stage LED sending card (10) can realize the cascade connection of the LED sending cards (10) through one HDMI interface.

3. The HDMI-concatenated LED transmitter card device of claim 1, wherein: the cascade connection number of the LED sending cards (10) is not more than 16.

4. The HDMI-concatenated LED transmitter card device of claim 1, wherein: the HDMI output interface (50) and the HDMI input interface (20) redefine two unnecessary pins in the HDMI interface as a No. 17 pin and a No. 18 pin.

5. The HDMI-concatenated LED transmitter card device of claim 1, wherein: the LED transmitting card (10) is provided with an HDMI loop-out function.

6. The HDMI-concatenated LED transmitter card device of claim 1, wherein: the LED transmission card (10) comprises a plurality of HDMI input interfaces (20).

7. The HDMI-concatenated LED transmitter card device of claim 1, wherein: the LED transmitting card (10) is internally provided with a communication interface (30) for transmitting communication signals, and the communication interface (30) is a USB interface.

8. The HDMI-concatenated LED transmitter card device of claim 7, wherein: the communication interface (30) may also be a UART or a network port.

Images