CN112309315A - LED display screen, LED display system and display box - Google Patents
LED display screen, LED display system and display box Download PDFInfo
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- CN112309315A CN112309315A CN201910701376.8A CN201910701376A CN112309315A CN 112309315 A CN112309315 A CN 112309315A CN 201910701376 A CN201910701376 A CN 201910701376A CN 112309315 A CN112309315 A CN 112309315A
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- led display
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
Abstract
The embodiment of the invention relates to an LED display screen, a display box body of which comprises: the box body frame is provided with a plurality of side surfaces and an accommodating space enclosed by the side surfaces; the LED display unit is arranged on the box body frame; the module controller is arranged in the accommodating space of the box body frame and is electrically connected with the LED display unit so as to drive and control the LED display unit to display images, and the module controller is provided with a pair of Ethernet interfaces; and the pair of wireless transmission modules are respectively arranged on different side surfaces of the box body frame and are correspondingly connected with the pair of Ethernet interfaces through cables. The working frequency of each wireless transmission module is located in a millimeter wave frequency band, and image data signals are transmitted between two adjacent display boxes in the plurality of display boxes in a wireless mode through one wireless transmission module. The embodiment of the invention also provides an LED display system adopting the LED display screen and a display box body suitable for the LED display screen.
Description
Technical Field
The invention relates to the technical field of display, in particular to an LED display screen, an LED display system and a display box body.
Background
In the LED display screen control system industry, the display box bodies basically transmit signals in wired modes such as network cables and the like. With the continuous development of the LED display screen technology, the pixel pitch of the LED display screen is smaller and smaller, the area of the screen body is larger and larger, the number of display boxes used by the LED display screen is larger and larger, and the number of connected wires is greatly increased. The net gape crystal head is fragile, needs a large amount of net twines to connect and also can cause very big puzzlement to subsequent debugging of staff and maintenance moreover, and these all the time all are the pain point problem of LED display screen control system trade, await the solution urgently.
Disclosure of Invention
In order to overcome the defects and shortcomings in the related art, the embodiment of the invention provides an LED display screen, an LED display system and a display box body.
On one hand, an LED display screen provided in an embodiment of the present invention includes: a plurality of display boxes spliced together. Each of the display cases includes: the box body frame is provided with a plurality of side surfaces and an accommodating space enclosed by the side surfaces; the LED display unit is arranged on the box body frame and comprises one or more LED modules; the module controller is arranged in the accommodating space of the box body frame and is electrically connected with the LED display unit so as to drive and control the LED display unit to display images, wherein the module controller is provided with a pair of Ethernet interfaces; and the pair of wireless transmission modules are respectively arranged on different sides of the plurality of sides of the box body frame and are in one-to-one correspondence connection with the pair of Ethernet interfaces through cables, wherein the working frequency of each wireless transmission module is positioned in a millimeter wave frequency band, and image data signals are transmitted between two adjacent display box bodies in the plurality of display box bodies in a wireless mode through one wireless transmission module.
The LED display screen of this embodiment utilizes the wireless transmission module of work at the millimeter wave frequency channel to show the image data signal transmission between the box, and it can realize showing the wireless connection between box and the display box, does not use the cable for example the net twine can connect between the display box and communicate to send or receive data with faster rate, higher LED display screen connection convenience is provided, and the time cost and the cost of labor of installation, dismantlement, maintenance display box have been showing and have been reduced. The wireless transmission module is directly arranged and integrated in the display box body, so that the display box body is convenient to install and disassemble.
In one embodiment of the invention, the operating frequency is in the frequency range of 57-67 GHZ, or 71-87 GHZ.
In an embodiment of the present invention, a communication distance between two wireless transmission modules wirelessly transmitting image data signals between two adjacent display boxes is less than or equal to 30 mm.
In one embodiment of the invention, the module controller comprises: the core board is provided with a first plug-in component, a programmable logic device, a microcontroller and an Ethernet physical layer transceiver group, wherein the programmable logic device and the microcontroller are respectively electrically connected with the first plug-in component, and the Ethernet physical layer transceiver group is electrically connected between the first plug-in component and the programmable logic device; and the adapter plate is provided with a second plugging component, a module interface group and the pair of Ethernet interfaces, the second plugging component and the first plugging component are plugged together to form electric connection, the module interface group is in wired connection with the LED display unit, and the pair of Ethernet interfaces are electrically connected with the second plugging component so as to form electric connection with the Ethernet physical layer transceiver group through the second plugging component and the first plugging component.
In an embodiment of the present invention, the core board is further provided with a network transformer, and the network transformer is electrically connected between the first plug assembly and the ethernet physical layer transceiver group; or the rotating plate is also provided with a network transformer which is electrically connected between the second plug-in component and the pair of Ethernet interfaces; alternatively, the pair of ethernet interfaces is integrated with a network transformer.
In one embodiment of the present invention, the wireless transmission module includes: the circuit board is provided with a second Ethernet interface, a second Ethernet physical layer transceiver, a wireless transmitting chip and a wireless receiving chip which are arranged on the circuit board; the second ethernet interface is electrically connected to the second ethernet physical layer transceiver and is connected to a corresponding ethernet interface of the pair of ethernet interfaces through the cable, and the wireless transmitting chip and the wireless receiving chip are electrically connected to the second ethernet physical layer transceiver through differential signal pairs, respectively.
In one embodiment of the present invention, the wireless transmission module further comprises a wired power interface, and the wired power interface is connected to the module controller by wire; the second ethernet interface, the second ethernet physical layer transceiver and the wired power interface are located on a first side of the circuit board, and the wireless transmitting chip and the wireless receiving chip are located on a second side of the circuit board opposite to the first side and are arranged at intervals in the length direction of the circuit board; and the second ethernet interface is located between the wireless transmitting chip and the wireless receiving chip in the length direction of the circuit board.
In one embodiment of the present invention, the wireless transmission module further includes a first annular wave-absorbing material element and a second annular wave-absorbing material element; the first annular wave-absorbing material element is fixed on the circuit board and arranged around the wireless transmitting chip, and the second annular wave-absorbing material element is fixed on the circuit board and arranged around the wireless receiving chip; the wireless transmitting chip is eccentrically arranged in the central hole of the first annular wave-absorbing material element, and the wireless receiving chip is eccentrically arranged in the central hole of the second annular wave-absorbing material element.
In another aspect, an embodiment of the present invention provides an LED display system, including: any one of the aforementioned LED display screens; and the system controller is provided with a second wireless transmission module and is used for receiving and processing an input video source so as to provide image data signals for the LED display screen through the second wireless transmission module, wherein the working frequency of the second wireless transmission module is positioned in a millimeter wave frequency band.
The LED display system of this embodiment has not only realized through wireless transmission module that display box and display box between wireless connection, has still realized the wireless connection between system controller and the display box, has simplified the connection convenience of each module in the display system greatly to the time cost and the cost of labor of installation, dismantlement, maintenance display box have been showing and have been reduced.
On the other hand, the display box provided by the embodiment of the invention comprises: the box body frame is provided with a first side surface, a second side surface and an accommodating space positioned between the first side surface and the second side surface, wherein the first side surface and the second side surface are opposite; the LED display unit is arranged on the box body frame and comprises one or more LED modules; the module controller is arranged in the accommodating space of the box body frame and is electrically connected with the LED display unit so as to drive and control the LED display unit to display images; and the pair of wireless transmission modules are respectively arranged on the first side surface and the second side surface of the box body frame, and the working frequency of each wireless transmission module is positioned in a millimeter wave frequency band. Wherein the module controller comprises: the core board is provided with a first plug-in component, a programmable logic device, a microcontroller and a first Ethernet physical layer transceiver group, wherein the programmable logic device and the microcontroller are respectively electrically connected with the first plug-in component, and the first Ethernet physical layer transceiver group is electrically connected between the first plug-in component and the programmable logic device; and the adapter plate is provided with a second plug-in component, a module interface group and a plurality of first Ethernet interfaces, the second plug-in component and the first plug-in component are plugged together to form electric connection, the module interface group is in wired connection with the LED display unit, and the plurality of first Ethernet interfaces are electrically connected with the second plug-in component so as to form electric connection with the first Ethernet physical layer transceiver group through the second plug-in component and the first plug-in component. Wherein each of the wireless transmission modules includes: the circuit board and setting are in second ethernet interface, second ethernet physical layer transceiver, wireless transmitting chip and wireless receiving chip on the circuit board, second ethernet interface electricity is connected second ethernet physical layer transceiver, and passes through the cable connection corresponding one in a plurality of first ethernet interfaces, and wireless transmitting chip with wireless receiving chip is through SerDes differential signal line electricity connection second ethernet physical layer transceiver respectively.
The display box body of the embodiment is provided with a pair of wireless transmission modules working in a millimeter wave frequency band, a wireless transmitting chip and a wireless receiving chip are separately designed in a single wireless transmission module, and the module controller is separately designed, so that the stability and the reliability of wireless communication can be effectively improved, and the modular design of the module controller is realized.
In summary, the above technical solutions of the embodiments of the present invention may have one or more of the following advantages: the LED display screen utilizes the wireless transmission module of work at the millimeter wave frequency channel to show the image data signal transmission between the box, and it can realize showing the wireless connection between box and the display box, does not use the cable for example the net twine can connect between the display box and communicate to send or receive data with faster rate, provide higher LED display screen connection convenience, and show the time cost and the cost of labor that have reduced installation, dismantlement, maintenance display box. The wireless transmission module is directly arranged and integrated in the display box body, so that the display box body is convenient to install and disassemble. The LED display system not only realizes the wireless connection between the display box body and the display box body, but also realizes the wireless connection between the system controller and the display box body through the wireless transmission module, thereby greatly simplifying the connection convenience of each module in the display system. The wireless transmission module adopts a separated design of a wireless transmitting chip and a wireless receiving chip and/or the module controller adopts a separated design, so that the stability and the reliability of wireless communication can be effectively improved and/or the modular design of the module controller can be realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an LED display screen according to an embodiment of the present invention.
Fig. 2 is a schematic diagram showing a specific structure of the single display box in fig. 1.
Fig. 3 is another schematic structural diagram of a core board in a module controller according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an interposer in a module controller according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of the wireless transmission module shown in fig. 1.
Fig. 6 and 7 are schematic layout views of front and back components of the circuit board of the wireless transmission module shown in fig. 5.
Fig. 8 is a schematic structural diagram of an LED display system according to an embodiment of the present invention.
Fig. 9 is a schematic structural diagram of another LED display system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
Referring to fig. 1 and 2, an embodiment of the present invention provides an LED display screen 100, including: a plurality of display cases 10 joined together; only three display housings 10 are shown in fig. 1 by way of example, but embodiments of the present invention are not limited to the specific number of display housings in the LED display screen 100.
As can be seen in fig. 1 and 2, each display cabinet 10 includes: a case frame 11, an LED display unit 13, a module controller 15, and a pair of wireless transmission modules 17a and 17 b.
The box frame 11 has a plurality of side surfaces S1 to S4 and an accommodating space 110 defined by the plurality of side surfaces S1 to S4, for example, the box frame 11 is a rectangular (including square) hollow structure.
The LED display unit 13 is disposed on the cabinet frame 11, for example, on the front surface of the cabinet frame 11, and includes a plurality of LED modules 130. The LED display unit 13 shown in fig. 2 includes four LED modules 130, but the embodiment of the invention does not limit the specific number of LED modules 130 in the LED display unit 13 of the display box 10, and may only have one LED module. Furthermore, a single LED module 130 typically has a plurality of LED display pixels, and the single LED display pixels include, for example, RGB LED lamps.
The module controller 15 is disposed in the accommodating space 110 of the box frame 11 and electrically connected to the LED display unit 13 for driving and controlling the LED display unit 13 to display images, and the module controller 15 of the present embodiment is provided with a pair of ethernet interfaces. As shown in fig. 2, as a non-limiting embodiment, the module controller 15 includes, for example: a core board 151 and an interposer 153. The module controller 15 of this embodiment with a separate design has less variation of circuit components on the core board 151, and is compatible with display boxes with different specifications and sizes by using different designs of the shape, size and/or number of interfaces of the adapter board 153.
The core board 151 includes a connector assembly 1518, a programmable logic device 1512, a microcontroller 1514, and ethernet physical layer transceiver sets 1516a and 1516 b. The programmable logic device 1512 and the microcontroller 1514 are electrically connected to a connector assembly 1518, respectively, and the ethernet physical layer transceiver sets 1516a and 1516b are electrically connected between the connector assembly 1518 and the programmable logic device 1512. It should be noted here that fig. 2 shows that the ethernet physical layer transceiver group includes two independent ethernet physical layer transceivers 1516a, 1516b, but the present invention does not exclude the possibility of integrating two ethernet physical layer transceivers into a single chip, that is, the ethernet physical layer transceiver group of the present embodiment includes one dual-port or multi-port ethernet physical layer transceiver. The connector assembly 1518 of the present embodiment includes, for example, two high-contact connectors having the same pin count, such as 100 pins, 120 pins, and 200 pins, which are provided in pairs.
The adaptor board 153 has a connector module 1532, a module interface set and a pair of ethernet interfaces 1534a and 1534 b. Fig. 2 shows that the module interface set includes four module interfaces 1536, but the embodiment of the invention does not limit the specific number of the module interfaces 1536. The plug assembly 1532 and the plug assembly 1518 are plugged together to form an electrical connection, such as with the interposer 153 as a backplane, and the core board 151 is electrically and mechanically connected by the plug assembly 1518 plugging into the plug assembly 1532 of the interposer 153. The module interface group is connected with the LED display unit through wires, for example, a flat cable connection mode or a board-to-board connection mode is adopted. Ethernet interfaces 1534a and 1534b electrically connect the connector assembly 1532 to Ethernet physical layer transceiver sets 1516a and 1516b via connector assembly 1532 and connector assembly 1518. For example, ethernet interfaces 1534a and 1534b are RJ45 ports integrated with network transformers; however, the invention is not limited thereto, and the RJ45 network port and the network transformer may be designed separately, for example, as shown in fig. 3, a network transformer 1517 is added between the patch module 1518 of the core board 151 and the ethernet physical layer transceiver sets 1516a and 1516b, or as shown in fig. 4, a network transformer 1533 is added between the patch module 1531 of the patch board 153 and the ethernet interfaces 1534a and 1534 b. The connector module 1532 of the present embodiment is, for example, a high-contact module having the same pin count as the connector module 1518, and may be two high-contact modules having the same pin count and provided in pair.
Referring to fig. 1 and 2 again, the wireless transmission modules 17a and 17b are respectively disposed on different sides, such as two opposite sides S2 and S4, of the plurality of sides S1-S4 of the box frame 11. Furthermore, the wireless transmission modules 17a and 17b are correspondingly connected to the ethernet interfaces 1534a and 1534b through two cables, for example, two network cables, so that the image data signals (for example, including control data and display data such as RGB data) are wirelessly transmitted between two adjacent display boxes 10 in the display boxes 10 in fig. 1 through a respective wireless transmission module (for example, the wireless transmission module 17b of the left display box and the wireless transmission module 17a of the right display box of the two adjacent display boxes) respectively.
In addition, the operating frequencies of the wireless transmission modules 17a and 17b are located in the millimeter wave band. The millimeter wave band herein typically means a frequency range of 30GHz to 300GHz with a corresponding wavelength of 1 mm to 10 mm. The wireless transmission modules 17a and 17b working in the millimeter wave band in this embodiment are very suitable for the application of the display box in the LED display screen, because the LED display screen is typically formed by splicing a plurality of display boxes, when the wireless transmission modules 17a and 17b are installed in each display box, the first consideration is how to avoid the wireless signal crosstalk between two wireless transmission modules (for example, the wireless transmission modules 17a and 17b in the same display box 10 or the wireless transmission modules 17a and 17b in different display boxes 10) that do not need to transmit and receive data in the same LED display screen, and the wireless transmission modules 17a and 17b in this embodiment work in the millimeter wave band, which can greatly reduce the possibility of wireless signal crosstalk compared with the wireless transmission modules such as the WiFi module and the bluetooth module in the prior art. Furthermore, based on the performance of the wireless chip and the easy availability of the frequency band, the working frequency of the wireless transmission module 17a, 17b is preferably in the frequency range of 57GHZ-67GHZ or 71GHZ-87GHZ, such as 60GHZ or 80 GHZ.
Referring to fig. 5, as a non-limiting embodiment, the wireless transmission module 17a includes, for example: the circuit board 170, and an ethernet interface 171, an ethernet physical layer transceiver 173, a wireless transmitting chip Tx, and a wireless receiving chip Rx disposed on the circuit board 170. Ethernet interface 171 is electrically connected to ethernet physical layer transceiver 173 and to ethernet interface 1534a or 1534b by a cable, such as a network cable. To simplify the design and improve electromagnetic compatibility, the ethernet interface 171 is integrated with a network transformer, such as an RJ45 network port integrated with a network transformer. The wireless transmitting chip Tx and the wireless receiving chip Rx are electrically connected to the ethernet physical layer transceiver 173, respectively. Further, to improve signal transmission stability, the wireless transmitting chip Tx is electrically connected to the ethernet physical layer transceiver 173 through a differential signal line pair, for example, the ethernet physical layer transceiver 173 is electrically connected through two SerDes (Serializer and Deserializer) differential signal lines; similarly, the wireless receiving chip Rx is electrically connected to the ethernet physical layer transceiver 173 through a differential signal line pair, for example, the ethernet physical layer transceiver 173 is electrically connected through two SerDes differential signal lines. Accordingly, the ethernet physical layer transceiver 173 is configured with, for example, a SerDes interface, thereby enabling data transmission and reception; it may specifically implement data transfer of the entire link using the unshielded twisted pair Media Converter (UTP-FIBER Media Converter) mode of operation of the ethernet physical layer transceiver 173. In addition, it is worth mentioning that the data wireless transmission and the data wireless reception are respectively performed by two independent chips in the embodiment, which can effectively ensure the stability and reliability of data reception and transmission.
More specifically, as shown in fig. 6 and 7, circuit board 170 has opposing first and second sides 170a and 170b, with ethernet interface 171 and ethernet physical layer transceiver 173 disposed on first side 170a of circuit board 170. Furthermore, the first side 170a of the circuit board 170 is further provided with a wired power interface 175, which has, for example, two 5V dc voltage input pins and two ground pins, but the embodiment is not limited thereto; the wired power interface 175 is connected to a power interface (not shown) on the adapter board 153 of the module controller 15, for example, by a flat cable. As can also be appreciated from fig. 6, the wired power interface 175 and the ethernet physical layer transceiver 173 are located on opposite sides of the ethernet interface 171 in a length direction of the circuit board 170 (in a longitudinal direction of fig. 6). The design of the embodiment that the ethernet interface 171 is arranged at the middle position of the first side 170a of the circuit board 170 is beneficial to maximize the space of the circuit board 170, and on the other hand, makes the circuit board 170 uniformly pulled by the network cable when connecting the cable, such as the network cable. Furthermore, the wired power interface 175 of the present embodiment is electrically connected to the ethernet physical layer transceiver 173, the wireless transmitting chip Tx and the wireless receiving chip Rx to provide the required operating voltage for each chip.
In fig. 7, the wireless transmitting chip Tx and the wireless receiving chip Rx are disposed at the second side 170b of the circuit board 170, and as can be seen from fig. 6 and 7, the wireless transmitting chip Tx and the wireless receiving chip Rx are located at opposite sides of the ethernet interface 171 in the length direction of the circuit board 170. The arrangement of the wireless transmitting chips Tx and the wireless receiving chips Rx can maximize the distance between the chips, minimize the communication crosstalk between the wireless transmitting chips Tx and the wireless receiving chips Rx on the circuit board 170, and further improve the reliability of data communication.
In light of the above, in order to better reduce the signal crosstalk between the wireless transmitting chip Tx and the wireless receiving chip Rx and enhance the communication capability of the chips, the second side 170b of the circuit board 170 is provided with annular wave-absorbing material elements 177 and 179. The annular wave-absorbing material element 177 is disposed around the wireless receiving chip Rx on the second side 170b, and preferably, in order to prevent the antenna signal affecting the internal antenna of the wireless receiving chip Rx, the wireless receiving chip Rx is disposed eccentrically in the central hole of the annular wave-absorbing material element 177, that is, the wireless receiving chip Rx is not disposed centrally; the annular wave-absorbing material element 177 of the embodiment is made of Lidar JCS-9 type wave-absorbing material, for example. Similarly, the annular wave absorbing material 179 is disposed around the wireless transmitting chip Tx at the second side 170b, and preferably the wireless transmitting chip Tx is disposed eccentrically within the central hole of the annular wave absorbing material 179 in order to prevent antenna signals affecting the internal antenna of the wireless transmitting chip Tx, i.e. the wireless transmitting chip Tx is not centrally disposed; the annular wave-absorbing material element 179 of the embodiment adopts, for example, a Lidar JCS-9 type wave-absorbing material. As a non-limiting example, the wireless transmitting chip Tx and the wireless receiving chip Rx of the present embodiment may use a KSS104M series chip commercially available, but may also use other wireless transmitting and receiving chips suitable for operating in the millimeter wave band.
As for the wireless transmission module 17b, it may have the same structure as the wireless transmission module 17a, and thus will not be described in detail. In addition, the inventor tests that when the communication distance between two wireless transmission modules (for example, the wireless transmission module 17b in the left display box and the wireless transmission module 17a in the right display box) which wirelessly transmit image data signals between two adjacent display boxes 10 is kept to be not more than 30 mm, the signal transmission reliability is the highest, and no obvious code loss phenomenon is found; when the communication distance is increased to 35 mm, there is a certain possibility of missing codes. As an example, the communication distance is set to be less than or equal to 10 mm, for example. In addition, the inventor tests also know that the delay of the wireless transmission performed by the wireless transmission modules 17a and 17b of the present embodiment can be kept within 500 picoseconds, which is equivalent to the delay of the traditional network cable transmission, and obviously the requirements of connection, design and installation of the LED display screen are completely met.
It should be noted that the wireless transmission module 17a according to the embodiment of the present invention is not limited to the wired interface circuit composed of the ethernet interface 171 and the ethernet physical layer transceiver 173 shown in fig. 5, and other wired interface circuits, such as an HDMI interface circuit, a DP interface circuit, an LVDS interface circuit, and a V-by-one interface circuit, may also be used, except that the wireless transmission module needs a plurality of pairs of wireless transmitting chips and wireless receiving chips instead of the pair of wireless transmitting chips and wireless receiving chips described in the foregoing embodiment.
In summary, the LED display screen according to the embodiment of the present invention utilizes the wireless transmission module operating in the millimeter wave frequency band to transmit the image data signal between the display boxes, so as to achieve wireless connection between the display boxes, connect the display boxes without cables such as network cables for communication, and transmit or receive data at a faster rate, thereby providing higher connection convenience of the LED display screen, and significantly reducing the time cost and labor cost for installing, detaching, and maintaining the display boxes. The wireless transmission module is directly arranged and integrated in the display box body, so that the display box body is convenient to install and disassemble. The LED display screen 100 of the present embodiment is suitable for LED televisions, rentals, high-end fixtures, and other fields.
Referring to fig. 8, an embodiment of the present invention provides an LED display system, including: an LED display screen 100 and a system controller 200. The specific structure of the LED display screen 100 can refer to the description of the foregoing embodiments, and therefore, the detailed description thereof is omitted. The system controller 200 is provided with a wireless transmission module 210 and is configured to receive and process an input video source to provide an image data signal (e.g., containing control data and display data such as RGB data) to the LED display screen 100 through the wireless transmission module 210. The operating frequency of the wireless transmission module 210 is located in a millimeter wave frequency band, and it may adopt the same structure as the wireless transmission module 17a shown in fig. 5 to 7, and is used for converting an electric signal into an electromagnetic signal to be wirelessly transmitted to the LED display screen 100, or converting an electromagnetic signal wirelessly input from the LED display screen 100 into an electric signal. The wireless transmission module 210 of the present embodiment is, for example, located outside the housing where the system controller 200 is located; of course, in some applications, the wireless transmission module 210 may also be located in the housing of the system controller 200, such as in an LED tv application, where the wireless transmission module 210 is located in the tv housing of the system controller 200.
As mentioned above, system controller 200 includes, for example, a video interface, a video decoder, a programmable logic device, an ethernet physical layer transceiver, and an ethernet interface, as one non-limiting embodiment. The video interface is used for receiving an input video source, and is, for example, a standard digital video interface such as HDMI, DVI and the like; the video decoder is electrically connected between the video interface and the programmable logic device and is, for example, an HDMI receiver, a DVI decoder, or the like; the ethernet physical layer transceiver is electrically connected between the programmable logic device and the ethernet interface. The Programmable logic device is, for example, an FPGA (field Programmable Gate array), the video decoder decodes an input video source to obtain data and a control signal, the data and the control signal are transmitted to the FPGA, the FPGA performs buffering via an internal RAM and performs operations of changing a clock domain and bit width conversion to obtain a processed image data signal, and the processed image data is output via the ethernet physical layer transceiver and the ethernet interface in sequence. The ethernet interface is here for example an RJ45 network port.
In conclusion, the LED display system of the embodiment not only realizes the wireless connection between the display box body and the display box body, but also realizes the wireless connection between the system controller and the display box body through the wireless transmission module, thereby greatly simplifying the connection convenience of each module in the display system, and remarkably reducing the time cost and labor cost for installing, disassembling and maintaining the display box body.
In addition, it should be noted that the wireless transmission modules 17a and 17b according to the embodiment of the present invention are not limited to be disposed on two opposite sides of the box frame, and may be disposed on two adjacent sides of the box frame as shown in fig. 9.
In addition, it should be understood that the foregoing embodiments are merely exemplary illustrations of the present invention, and the technical solutions of the embodiments can be arbitrarily combined and collocated without conflict between technical features and structural contradictions, which do not violate the purpose of the present invention.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will 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 of the embodiments of the present invention.
Claims (10)
1. An LED display screen, comprising: a plurality of display cases spliced together; each of the display cases includes:
the box body frame is provided with a plurality of side surfaces and an accommodating space enclosed by the side surfaces;
the LED display unit is arranged on the box body frame and comprises one or more LED modules;
the module controller is arranged in the accommodating space of the box body frame and is electrically connected with the LED display unit so as to drive and control the LED display unit to display images, wherein the module controller is provided with a pair of Ethernet interfaces; and
and the pair of wireless transmission modules are respectively arranged on different sides of the plurality of sides of the box body frame and are in one-to-one correspondence connection with the pair of Ethernet interfaces through cables, wherein the working frequency of each wireless transmission module is positioned in a millimeter wave frequency band, and image data signals are transmitted between two adjacent display box bodies in the plurality of display box bodies in a wireless mode through one wireless transmission module.
2. The LED display screen of claim 1, wherein the operating frequency is in the frequency range of 57GHZ-67GHZ, or 71GHZ-87 GHZ.
3. The LED display screen of claim 1, wherein the communication distance between two wireless transmission modules wirelessly transmitting image data signals between two adjacent display boxes is less than or equal to 30 mm.
4. The LED display screen of claim 1, wherein the module controller comprises:
the core board is provided with a first plug-in component, a programmable logic device, a microcontroller and an Ethernet physical layer transceiver group, wherein the programmable logic device and the microcontroller are respectively electrically connected with the first plug-in component, and the Ethernet physical layer transceiver group is electrically connected between the first plug-in component and the programmable logic device; and
the adapter plate is provided with a second plugging component, a module interface group and the pair of Ethernet interfaces, the second plugging component and the first plugging component are plugged together to form electric connection, the module interface group is in wired connection with the LED display unit, and the pair of Ethernet interfaces are electrically connected with the second plugging component so as to form electric connection with the Ethernet physical layer transceiver group through the second plugging component and the first plugging component.
5. The LED display screen of claim 4 wherein the core board further includes a network transformer, the network transformer being electrically connected between the first connector assembly and the set of ethernet physical layer transceivers; or the rotating plate is also provided with a network transformer which is electrically connected between the second plug-in component and the pair of Ethernet interfaces; alternatively, the pair of ethernet interfaces is integrated with a network transformer.
6. The LED display screen of claim 1, wherein the wireless transmission module comprises: the circuit board is provided with a second Ethernet interface, a second Ethernet physical layer transceiver, a wireless transmitting chip and a wireless receiving chip which are arranged on the circuit board; the second ethernet interface is electrically connected to the second ethernet physical layer transceiver and is connected to a corresponding ethernet interface of the pair of ethernet interfaces through the cable, and the wireless transmitting chip and the wireless receiving chip are electrically connected to the second ethernet physical layer transceiver through differential signal pairs, respectively.
7. The LED display screen of claim 6, wherein the wireless transmission module further comprises a wired power interface, and the wired power interface is wired to the module controller; the second ethernet interface, the second ethernet physical layer transceiver and the wired power interface are located on a first side of the circuit board, and the wireless transmitting chip and the wireless receiving chip are located on a second side of the circuit board opposite to the first side and are arranged at intervals in the length direction of the circuit board; and the second ethernet interface is located between the wireless transmitting chip and the wireless receiving chip in the length direction of the circuit board.
8. The LED display screen of claim 7, wherein the wireless transmission module further comprises a first annular wave-absorbing material element and a second annular wave-absorbing material element; the first annular wave-absorbing material element is fixed on the circuit board and arranged around the wireless transmitting chip, and the second annular wave-absorbing material element is fixed on the circuit board and arranged around the wireless receiving chip; the wireless transmitting chip is eccentrically arranged in the central hole of the first annular wave-absorbing material element, and the wireless receiving chip is eccentrically arranged in the central hole of the second annular wave-absorbing material element.
9. An LED display system, comprising:
the LED display screen of any one of claims 1 to 8; and
and the system controller is provided with a second wireless transmission module and is used for receiving and processing an input video source so as to provide image data signals for the LED display screen through the second wireless transmission module, wherein the working frequency of the second wireless transmission module is positioned in a millimeter wave frequency band.
10. A display cabinet, comprising:
the box body frame is provided with a first side surface, a second side surface and an accommodating space positioned between the first side surface and the second side surface, wherein the first side surface and the second side surface are opposite;
the LED display unit is arranged on the box body frame and comprises one or more LED modules;
the module controller is arranged in the accommodating space of the box body frame and is electrically connected with the LED display unit so as to drive and control the LED display unit to display images; and
the pair of wireless transmission modules are respectively arranged on the first side surface and the second side surface of the box body frame, and the working frequency of each wireless transmission module is positioned in a millimeter wave frequency band;
wherein the module controller comprises:
the core board is provided with a first plug-in component, a programmable logic device, a microcontroller and a first Ethernet physical layer transceiver group, wherein the programmable logic device and the microcontroller are respectively electrically connected with the first plug-in component, and the first Ethernet physical layer transceiver group is electrically connected between the first plug-in component and the programmable logic device; and
the adapter plate is provided with a second plug-in component, a module interface group and a plurality of first Ethernet interfaces, the second plug-in component and the first plug-in component are plugged together to form electric connection, the module interface group is connected with the LED display unit through a wire, and the plurality of first Ethernet interfaces are electrically connected with the second plug-in component to form electric connection with the first Ethernet physical layer transceiver group through the second plug-in component and the first plug-in component;
wherein each of the wireless transmission modules includes: the circuit board and setting are in second ethernet interface, second ethernet physical layer transceiver, wireless transmitting chip and wireless receiving chip on the circuit board, second ethernet interface electricity is connected second ethernet physical layer transceiver, and passes through the cable connection corresponding one in a plurality of first ethernet interfaces, and wireless transmitting chip with wireless receiving chip is through SerDes differential signal line electricity connection second ethernet physical layer transceiver respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910701376.8A CN112309315A (en) | 2019-07-31 | 2019-07-31 | LED display screen, LED display system and display box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910701376.8A CN112309315A (en) | 2019-07-31 | 2019-07-31 | LED display screen, LED display system and display box |
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| Publication Number | Publication Date |
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| CN112309315A true CN112309315A (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910701376.8A Pending CN112309315A (en) | 2019-07-31 | 2019-07-31 | LED display screen, LED display system and display box |
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Application publication date: 20210202 |