CN112992046A

CN112992046A - LED display system

Info

Publication number: CN112992046A
Application number: CN201911292881.8A
Authority: CN
Inventors: 王翰; 韦桂锋
Original assignee: Xian Novastar Electronic Technology Co Ltd
Current assignee: Xian Novastar Electronic Technology Co Ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2021-06-18

Abstract

The embodiment of the present application relates to an LED display system, including: the system comprises a transmitting card, an expansion daughter card and an LED display screen; and the extension daughter card is connected between the sending card and the LED display screen. Through the arrangement of the extension sub-cards, each line or each row of display modules of the LED display screen can be connected with one Ethernet interface, and different lines or different rows of display modules are connected with different Ethernet interfaces, so that the connection line between the display modules can be simplified, and the subsequent screen matching operation is facilitated.

Description

LED display system

Technical Field

The application relates to the technical field of display, in particular to an LED display system.

Background

In the LED display technology field, there are many wiring ways among display modules, such as display boxes, in an LED display screen, for example, display boxes located in different rows are cascaded together through a network cable to form a cascade group, display boxes located in different columns are cascaded together through a network cable to form a cascade group, and even display boxes located in the same row or the same column may belong to different cascade groups. With the wider application of LED display screens, the usability requirement of LED display screens is also higher and higher, for example, it is necessary to simplify the connection between the display boxes, so that each RJ45 net port of the transmitting card only carries one row or one column of display boxes, so as to facilitate the subsequent screen matching operation. However, the number of RJ45 ports of the prior art card is limited, which makes it difficult to satisfy the requirement that each RJ45 port carries only one row or column of display cases.

Disclosure of Invention

To overcome at least the drawbacks and deficiencies of the related art, embodiments of the present application provide an LED display system.

In one aspect, an LED display system provided in an embodiment of the present application includes: the system comprises a transmitting card, an expansion daughter card and an LED display screen. The transmitting card is provided with a video interface, a video processing circuit, at least one multi-gigabit Ethernet physical layer transceiver, at least one first Ethernet interface and an expansion connector, wherein the video interface, the expansion connector and the at least one multi-gigabit Ethernet physical layer transceiver are respectively connected with the video processing circuit, and the at least one first Ethernet interface is electrically connected with the at least one multi-gigabit Ethernet physical layer transceiver. The expansion daughter card is provided with a second connector, a multi-port gigabit Ethernet physical layer transceiver and a plurality of second Ethernet interfaces, wherein the multi-port gigabit Ethernet physical layer transceiver is electrically connected with the second connector, the plurality of second Ethernet interfaces are respectively electrically connected with the multi-port gigabit Ethernet physical layer transceiver, and the second connector is connected with the expansion connector. The LED display screen comprises a plurality of display modules which are arranged in a row and column mode, and each display module is provided with a module control card and at least one LED display panel which is electrically connected with the module control card. The module control cards of all the display modules in the same row are sequentially cascaded and are any one, the second Ethernet interfaces are electrically connected with the first or last display modules in one row of the display modules, or the module control cards of all the display modules in the same row are sequentially cascaded and are any one, and the second Ethernet interfaces are electrically connected with the first or last display modules in one row of the display modules.

In the technical scheme, the expansion of the number of the Ethernet interfaces is realized by additionally arranging the expansion daughter card, and the expansion daughter card is applied between the sending card and the LED display screen, so that each line or each column of display modules (such as a display box) of the LED display screen can be connected with one Ethernet interface, and different lines or different columns of display modules are connected with different Ethernet interfaces, thereby simplifying the connection between the display modules and facilitating the subsequent screen configuration operation.

In one embodiment of the present application, each of the multi-gigabit Ethernet physical layer transceivers is a 2.5GBASE-T type, a 5GBASE-T type, or a 10GBASE-T type Ethernet physical layer transceiver.

In one embodiment of the present application, the at least one multi-gigabit ethernet physical layer transceiver is electrically connected to the video processing circuitry via a first SERDES channel.

In an embodiment of the present application, the number of the at least one multi-gigabit ethernet physical layer transceiver is two, the number of the at least one first ethernet interface is two, the transmitting card further includes a network transformer set, and the two first ethernet interfaces are electrically connected to the two multi-gigabit ethernet physical layer transceivers through the network transformer set, respectively.

In one embodiment of the application, the multi-port gigabit ethernet physical layer transceiver is electrically connected to the video processing circuit through a second SERDES channel, and the extension connector and the second connector are located in the second SERDES channel.

In one embodiment of the present application, the video processing circuit includes a programmable logic device, a microprocessor electrically connected to the programmable logic device, and a video decoder electrically connected between the video interface and the programmable logic device, the multi-port gigabit ethernet physical layer transceiver is electrically connected to the programmable logic device in the video processing circuit through the second SERDES channel, and the microprocessor is electrically connected to the video decoder and electrically connected to the multi-port gigabit ethernet physical layer transceiver through the expansion connector and the second connector.

In an embodiment of the present application, the number of the second SERDES channels is two, each of the second SERDES channels includes two pairs of differential lines, and one of the two pairs of differential lines is used for data transmission, and the other pair of differential lines is used for data reception.

In one embodiment of the present application, the microprocessor is installed with an embedded operating system.

In one embodiment of the present application, the video interface is a digital video interface or an analog video interface.

In one embodiment of the present application, the video decoder is a DVI decoder, an HDMI decoder, or a DP decoder.

In summary, the above technical solution of the embodiment of the present application may have one or more of the following advantages: the expansion of the number of the Ethernet interfaces is realized by additionally arranging the expansion daughter card, and the expansion daughter card is applied between the sending card and the LED display screen, so that each line or each row of display modules (such as a display box) of the LED display screen can be connected with one Ethernet interface, and different lines or different rows of display modules are connected with different Ethernet interfaces, thereby simplifying the connection line between the display modules and facilitating the subsequent screen configuration operation. Moreover, the use of the multi-port gigabit Ethernet physical layer transceiver and the SERDES channel on the expansion daughter card is beneficial to simplifying the circuit design of the expansion daughter card and reducing the occupied number of chip pins of the video processing circuit on the transmitting card, thereby achieving the purpose of achieving larger load carrying capacity with less occupied number of chip pins.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an LED display system according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of an embodiment of the transmitter card and the daughter card extension shown in fig. 1.

Fig. 3 is a schematic structural diagram of another specific implementation of the sending card according to the embodiment of the present application.

Fig. 4 is a schematic structural diagram of the display module shown in fig. 1.

FIG. 5 is a schematic diagram of a specific structure of the module control card shown in FIG. 1.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, an LED display system 10 provided in the embodiment of the present application includes: a transmitter card 11, an extended daughter card 13, and an LED display screen 15.

Among them, the transmission card 11 is provided with a video interface 111, a video processing circuit 113, a multi-gigabit ethernet physical layer transceiver 115, an ethernet interface 117, and an expansion connector 119. The video interface 111, the multi-gigabit ethernet physical layer transceiver 115, and the expansion connector 119 are respectively connected to the video processing circuit 113. The ethernet interface 117 electrically connects the multi-gigabit ethernet physical layer transceiver 115.

The extended daughter card 13 is provided with a connector 131, a multi-port gigabit ethernet physical layer transceiver 133, and a plurality of ethernet interfaces 135. The multi-port gigabit ethernet physical layer transceiver 133 is electrically connected to the connector 131, the ethernet interfaces 135 are respectively electrically connected to the multi-port gigabit ethernet physical layer transceiver 133, and the connector 131 is connected to the expansion connector 119. Here, the extended daughter card 13 and the transmitting card 11 may be arranged in two layers, i.e., an upper layer and a lower layer, and fixed to the extended connector 119 through the connector 131, or may be arranged in a left-right direction and fixed to the extended connector 119 through the connector 131. The connector 131 and the expansion connector 119 here are, for example, a female header and a needle header, respectively, or a needle header and a female header, respectively; the plurality of ethernet interfaces 135 are, for example, a plurality of RJ45 ports, and these RJ45 ports are electrically connected to respective ports of the multi-port gigabit ethernet physical layer transceiver 133 through a plurality of network transformers (not depicted in fig. 1); for example, each two RJ45 ports share one network transformer, and taking the example where the multi-port gigabit ethernet physical layer transceiver 133 is an eight-port gigabit ethernet physical layer transceiver chip, four network transformers are required to connect eight RJ45 ports. It should be noted that the RJ45 network port and the network transformer may be separately arranged or integrated together; of course, each RJ45 network port can be configured with a network transformer separately.

The LED display screen 15 includes a plurality of display modules 150 arranged in rows and columns, and each of the display modules 150 is configured with a module control card 151 and an LED display panel (not shown in fig. 1) electrically connected to the module control card 151.

In the above, the module control cards 151 of the display modules 150 in the same row are sequentially cascaded, and any one of the ethernet interfaces 135 is electrically connected to the module control card 151 of the first or last display module in one row of display modules. Specifically, as shown in fig. 1, there are four display modules 150 in the same row, and each module control card 151 of the four display modules 150 is cascaded in the row direction; any one of the ethernet interfaces 135 is electrically connected to the module control card 151 of the rightmost display module in a row of display modules (i.e., to the four display modules 150 that are sequentially cascaded in the row direction), and of course, may also be electrically connected to the module control card 151 of the leftmost display module. Furthermore, it is to be understood that, in other embodiments, it may be: the module control cards 151 of the display modules 150 in the same row are sequentially cascaded in the row direction, and any one of the second ethernet interfaces 135 is electrically connected to the module control card 151 of the first or last display module (e.g., the top or bottom display module in the row direction) in a row of display modules.

Referring to FIG. 2, in one embodiment, the multi-gigabit Ethernet physical layer transceiver 115 is, for example, a 2.5GBASE-T type Ethernet physical layer transceiver, a 5GBASE-T type Ethernet physical layer transceiver, a 10GBASE-T type Ethernet physical layer transceiver, or other Ethernet physical layer transceiver with a transmission bandwidth of 1Gbps higher than the transmission bandwidth of a 1GBASE-T type Ethernet physical layer transceiver; for example, the 5GBASE-T ethernet physical layer transceiver may be AQR111C PHY chip from Aquantia, or BCM54992 PHY chip from Broadcom, but the embodiment of the present invention is not limited thereto. The multi-gigabit ethernet physical layer transceiver 115 is electrically connected to the video processing circuit 113 through SERDES channels. For example, video processing circuit 113 includes a programmable logic device 1132, a microprocessor 1134, and a video decoder 1136. The microprocessor 1134 is electrically connected to the programmable logic device 1132. The video decoder 1136 is electrically connected between the video interface 111 and the programmable logic device 1132. The multi-port gigabit ethernet physical layer transceiver 133 is electrically connected to the programmable logic device 1132 in the video processing circuit 113 through a SERDES channel, and the connector 131 and the expansion connector 119 are located in the SERDES channel between the multi-port gigabit ethernet physical layer transceiver 133 and the programmable logic device 1132. The microprocessor 1134 is also electrically connected to the video decoder 1136 and the multi-port gigabit ethernet physical layer transceiver 133 via the expansion connector 119 and the connector 131, for example, via an I2C bus or other suitable serial communication bus. Here, the multi-port gigabit ethernet physical layer transceiver 133 may adopt 88E1680 transceiver chip of Marvell corporation, the microprocessor 1134 may adopt RK3288 processor chip of rayleigh core micro corporation so as to install an embedded operating system, so as to make the performance of the transmitting card 11 more powerful, or adopt STM32F chip of ST corporation which cannot install the embedded operating system, and the programmable logic device 1132 may adopt Kintex-7K 325T chip of Xilinx corporation, but the embodiment of the present application is not limited thereto. Furthermore, for SERDES channels between the multi-gigabit ethernet physical layer transceiver 115 and the programmable logic device 1132, it may be one SERDES channel (transmission bandwidth may be up to 6.5Gbps) and each SERDES channel includes two pairs of differential signal lines, one pair of differential signal lines is used for data transmission and the other pair of differential signal lines is used for data reception; for the SERDES channels between the multi-port gigabit ethernet physical layer transceiver 133 and the programmable logic device 1132, taking the example that the multi-port gigabit ethernet physical layer transceiver 133 adopts an eight-port gigabit ethernet physical layer transceiver chip, the number of the SERDES channels may be two and each SERDES channel includes two pairs of differential signal lines based on the consideration of transmission bandwidth. The SERDES (SERializer/DESerializer) channel is used as a high-speed serial channel, which can realize high-speed transmission of image data, and can realize a large tape load capability with a small pin count of the programmable logic device 1132, such as an FPGA.

The video decoder 1136 is, for example, a digital video decoder such as a DVI (digital visual Interface) decoder, an HDMI (High-Definition Multimedia Interface) decoder, or a dp (display port) decoder, and may also be an analog video decoder. Accordingly, the video interface 111 may be a standard digital video interface or an analog video interface.

Referring to fig. 3, the number of multi-gigabit ethernet physical layer transceivers 115 on the transmitting card 11 of the present embodiment may also be multiple, such as two, and correspondingly, the number of ethernet interfaces 117 is also multiple, such as two. The transmitter card 11 is typically further provided with a network transformer bank (not shown) to enhance signal and improve interference rejection capability, and the two ethernet interfaces 117 are electrically connected to the two multi-gigabit ethernet physical layer transceivers 115 through the network transformer bank, respectively. The network transformer bank here may be a single chip integrating two network transformers, or two independent network transformers.

Referring to fig. 4, in one embodiment, the display module 150 includes, for example, a module control card 151, a plurality of, e.g., four LED display panels 153, and a module frame 155. The module frame 155 has a display panel mounting surface 1551 and a board card accommodating space located on the back side of the display panel mounting surface 1551, the four LED display panels 153 are spliced together and fixedly mounted on the display panel mounting surface 1551, and the module control card 151 is mounted in the board card accommodating space and electrically connected to the four LED display panels 153. It should be noted here that the number of the LED display panels 153 is not limited to four as shown in fig. 4, and may also be flexibly set according to the actual size of the display module 150, for example, one LED display panel or even more LED display lamp panels may also be provided.

Referring to fig. 5, the module control card 151 includes, for example, a programmable logic device 1511, a plurality of ethernet physical layer transceivers 1513, a plurality of ethernet interfaces 1515, and a plurality of LED display board connectors 1517. Each ethernet interface 1515 is electrically connected to the programmable logic device 1511 via an ethernet physical layer transceiver 1513, where the ethernet physical layer transceiver 1513 is, for example, a 1GBASE-T type ethernet physical layer transceiver such as an AR8035 chip from Atheros corporation. Moreover, a network transformer can be additionally arranged between the Ethernet physical layer transceiver 1513 and the Ethernet interface 1515 to enhance signals and improve the anti-interference capability; here, two ethernet interfaces 1515, such as RJ45, may share a network transformer, or each ethernet interface 1515 may be configured with a network transformer separately.

As described above, the LED panel connectors 1517 are respectively electrically connected to the programmable logic devices 1511, which are, for example, pin headers so as to be electrically connected to the LED display panels 153 via wires, so as to transmit the display data (such as RGB data) and the display control signals (such as clock signals, latch signals, enable signals, row decode signals, etc.) output by the programmable logic devices 1511 to the corresponding LED display panels 153. In other embodiments, each LED display panel connector 1517 may also be a contactless connector that wirelessly interacts with the corresponding LED display panel 153 to enable transmission of display data and display control signals.

In addition, it is worth to be noted that, for the module control card 151 shown in fig. 5, which may be a single circuit board structure, the programmable logic device 1511, the ethernet physical layer transceivers 1513, the ethernet interfaces 1515, and the LED display board connectors 1517 are all disposed on the same circuit board; alternatively, the module control card 151 is a dual circuit board structure, for example, the programmable logic device 1511 and the ethernet physical layer transceivers 1513 are disposed on a core board (which may be called a scan card or a receive card), and the ethernet interfaces 1515 and the LED display board connectors 1517 are disposed on a backplane fixed to the core board by plugging, but the embodiment of the present invention is not limited thereto.

To sum up, the extension of ethernet interface quantity is realized through adding the extension daughter card in this application embodiment, will the extension daughter card is used between sending card and LED display screen, and it can guarantee that every line or every row of display module (for example, display box) of LED display screen connects an ethernet interface, and different lines or different rows of display module connect different ethernet interfaces to can simplify the line between the display module, and be convenient for follow-up join in marriage the screen operation. Moreover, the use of the multi-port gigabit Ethernet physical layer transceiver and the SERDES channel on the expansion daughter card is beneficial to simplifying the circuit design of the expansion daughter card and reducing the occupied number of chip pins of the video processing circuit on the transmitting card, thereby achieving the purpose of achieving larger load carrying capacity with less occupied number of chip pins.

In addition, it should be noted that, in order to implement a larger number of ethernet interface extensions, a single extended daughter card 13 in the embodiment of the present application is not limited to be provided with one multi-port gigabit ethernet physical layer transceiver 133, and a plurality of multi-port gigabit ethernet physical layer transceivers 133 may be provided and connected to the video processing circuit 113 of the transmitting card 11 through the connector 131 and the extension connector 119 respectively by a required number of SERDES channels; alternatively, a plurality of expansion daughter cards 13 provided with one multi-port gigabit ethernet physical layer transceiver 133 may be connected to the same transmission card 11, which may also realize the expansion of the number of ethernet interfaces. Furthermore, the multi-port gigabit ethernet physical layer transceiver 133 is not limited to a gigabit ethernet physical layer transceiver, and may be replaced with other multi-port ethernet physical layer transceivers such as a multi-port multi-gigabit ethernet physical layer transceiver as the technology advances.

In addition, it is understood that the foregoing embodiments are merely exemplary illustrations of the present application, and technical solutions of the embodiments can be arbitrarily combined and used in combination without conflict between technical features and structures, and without departing from the purpose of the invention of the present application.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. An LED display system, comprising:

the transmitting card is provided with a video interface, a video processing circuit, at least one multi-gigabit Ethernet physical layer transceiver, at least one first Ethernet interface and an expansion connector, wherein the video interface, the expansion connector and the at least one multi-gigabit Ethernet physical layer transceiver are respectively connected with the video processing circuit, and the at least one first Ethernet interface is electrically connected with the at least one multi-gigabit Ethernet physical layer transceiver;

the expansion daughter card is provided with a second connector, a multi-port gigabit Ethernet physical layer transceiver and a plurality of second Ethernet interfaces, wherein the multi-port gigabit Ethernet physical layer transceiver is electrically connected with the second connector, the plurality of second Ethernet interfaces are respectively electrically connected with the multi-port gigabit Ethernet physical layer transceiver, and the second connector is connected with the expansion connector; and

the LED display screen comprises a plurality of display modules which are arranged in a row and column mode, and each display module is provided with a module control card and at least one LED display panel which is electrically connected with the module control card;

the module control cards of all the display modules in the same row are sequentially cascaded and are any one, the second Ethernet interfaces are electrically connected with the first or last display modules in one row of the display modules, or the module control cards of all the display modules in the same row are sequentially cascaded and are any one, and the second Ethernet interfaces are electrically connected with the first or last display modules in one row of the display modules.

2. The LED display system of claim 1, wherein each of the multi-gigabit ethernet physical layer transceivers is a 2.5GBASE-T type, a 5GBASE-T type, or a 10GBASE-T type ethernet physical layer transceiver.

3. The LED display system of claim 2, wherein the at least one multi-gigabit ethernet physical layer transceiver is electrically connected to the video processing circuit via a first SERDES channel.

4. The LED display system of claim 3, wherein the at least one multi-gigabit ethernet physical layer transceiver is two in number, the at least one first ethernet interface is two in number, the transmitter card further comprises a network transformer bank, and the two first ethernet interfaces are electrically connected to the two multi-gigabit ethernet physical layer transceivers, respectively, through the network transformer bank.

5. The LED display system of claim 1, wherein the multi-port gigabit ethernet physical layer transceiver is electrically connected to the video processing circuit by a second SERDES channel, and the expansion connector and the second connector are located in the second SERDES channel.

6. The LED display system of claim 5, wherein the video processing circuitry comprises a programmable logic device, a microprocessor electrically connected to the programmable logic device, and a video decoder electrically connected between the video interface and the programmable logic device, the multi-port gigabit ethernet physical layer transceiver electrically connected to the programmable logic device in the video processing circuitry through the second SERDES channel, and the microprocessor electrically connected to the video decoder and electrically connected to the multi-port gigabit ethernet physical layer transceiver through the expansion connector and the second connector.

7. The LED display system of claim 6 wherein the number of second SERDES channels is two, each of the second SERDES channels comprising two pairs of differential lines, and wherein one of the two pairs of differential lines is used for data transmission and the other pair of differential lines is used for data reception.

8. The LED display system of claim 6, wherein the microprocessor is installed with an embedded operating system.

9. The LED display system of claim 6, wherein the video interface is a digital video interface or an analog video interface.

10. The LED display system of claim 6, wherein the video decoder is a DVI decoder, an HDMI decoder, or a DP decoder.