CN112397011A

CN112397011A - LED display screen, LED display system and display box

Info

Publication number: CN112397011A
Application number: CN201910700921.1A
Authority: CN
Inventors: 冯思杭; 韦桂锋
Original assignee: Xian Novastar Electronic Technology Co Ltd
Current assignee: Xian Novastar Electronic Technology Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2021-02-23
Anticipated expiration: 2039-07-31
Also published as: CN112397011B

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 first to fourth side surfaces and an accommodating space enclosed by the first to fourth side surfaces; the LED display unit is arranged on the box body frame; the module controller is arranged in the accommodating space and electrically connected with the LED display unit so as to drive and control the LED display unit to display images; and first to fourth wireless transceivers respectively arranged on the first to fourth sides and electrically connected with the module controller, wherein the operating frequencies of the first to fourth wireless transceivers are located in the millimeter wave frequency band. 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. The embodiment of the invention can simplify the connection configuration operation of the LED display screen and realize the wireless cascade connection between the display box bodies.

Description

LED display screen, LED display system and display box

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

The LED display screen is composed of one display box body which is provided with the module controllers, each module controller can only control one display box body, and therefore if the LED display screen needs to display a complete picture, the configuration of the connection of the display screen needs to be carried out through matched upper computer software. This is a way that LED display screen control system industry has been in use for decades.

However, with the development of the industry, the application of the LED display screen is more and more extensive, and the user experience and demand for the operation of the LED display screen are also continuously updating the cognition and development of the industry. One of the most frequently discussed is that the LED display screen is too complex to be configured, which greatly affects the user experience. Furthermore, LED displays have expanded from traditional outdoor media to indoor conference room applications, facing groups of users who are not professionals in the industry who are not practical to configure if they use LED displays. The people need the experience the same as that of the liquid crystal display television, namely, the LED display screen displays a complete picture after being electrified, and the information can be displayed and lectured by connecting the LED display screen with the video interface. Therefore, how to simplify the connection configuration of the LED display screen is a technical problem to be solved urgently at present.

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 cascaded display boxes; each of the display cases includes: the box body frame is provided with a first side surface, a second side surface, a third side surface, a fourth side surface and an accommodating space enclosed by the first side surface, the second side surface, the third side surface and the fourth side surface; wherein the first side and the third side are opposite sides, and the second side and the fourth side are opposite sides; 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 and electrically connected with the LED display unit so as to drive and control the LED display unit to display images; and the first wireless transceiver, the second wireless transceiver, the third wireless transceiver and the fourth wireless transceiver are respectively arranged on the first side surface, the second side surface, the third side surface and the fourth side surface and are electrically connected with the module controller, the working frequencies of the first wireless transceiver, the second wireless transceiver, the third wireless transceiver and the fourth wireless transceiver are positioned in a millimeter wave frequency band, and the front stage display boxes of two adjacent display boxes in the cascaded plurality of display boxes are connected with the first wireless transceiver, the second wireless transceiver, the third wireless transceiver and the fourth wireless transceiver through one target wireless transceiver in the cascaded plurality of display boxes, One of the second wireless transceiver, the third wireless transceiver and the fourth wireless transceiver, which is adjacent to and opposite to the target wireless transceiver, wirelessly transmits image data signals.

The LED display screen of this embodiment installs the wireless transceiver that operating frequency is located the millimeter wave frequency channel respectively in the first to fourth side of each display box, and it can utilize each wireless transceiver automatic determination to show the position coordinate of box in whole LED display screen, can realize the wireless cascade between the display box by this to can simplify the connection configuration operation of LED display screen, and show the time cost and the cost of labor that have reduced installation, dismantlement, maintenance display box.

In one embodiment of the invention, the operating frequency is in the frequency range of 57-67 GHZ or 71-87 GHZ.

In one embodiment of the present invention, a communication distance between the target wireless transceiver and the wireless transceiver adjacent to and opposite the target wireless transceiver is less than or equal to 30 millimeters.

In one embodiment of the invention, the wireless transceiver comprises: the wireless transmission device comprises a circuit board, and an Ethernet interface, a physical layer transceiver, a wireless transmission chip and a wireless receiving chip which are arranged on the circuit board; the Ethernet interface is electrically connected with the physical layer transceiver and the module controller through a network cable, and the wireless transmitting chip and the wireless receiving chip are electrically connected with the physical layer transceiver through a SerDes differential signal wire pair respectively.

In one embodiment of the present invention, the wireless transceiver further comprises a wired power interface, and the wired power interface is wired to the module controller; the Ethernet interface, the physical layer transceiver and the wired power interface are positioned on a first side of the circuit board, and the wireless transmitting chip and the wireless receiving chip are positioned on a second side of the circuit board, which is opposite to the first side, and are arranged at intervals in the length direction of the circuit board; the Ethernet interface is positioned between the wireless transmitting chip and the wireless receiving chip in the length direction of the circuit board, and the working frequency of the wireless transmitting chip and the working frequency of the wireless receiving chip are positioned in the millimeter wave frequency band.

In one embodiment of the invention, the wireless transceiver comprises: the wireless transmission device comprises a circuit board, and a direct current-to-direct current circuit, a wireless transmission chip and a wireless receiving chip which are arranged on the circuit board; the circuit board is provided with a pad group, the pad group is electrically connected with one end of a cable for transmitting data signals and power signals, and the other end of the cable is electrically connected with the module controller; the direct current-to-direct current circuit is electrically connected with the pad group to obtain a power supply signal, the wireless transmitting chip is electrically connected with the pad group through a SerDes differential signal line pair to be used for receiving a data signal from the pad group, and the wireless receiving chip is electrically connected with the pad group through another SerDes differential signal line pair to be used for transmitting the data signal to the pad group; the wireless transmitting chip and the wireless receiving chip are arranged at intervals in the length direction of the circuit board, and the working frequency of the wireless transmitting chip and the working frequency of the wireless receiving chip are located in the millimeter wave frequency band.

In one embodiment of the invention, the wireless transceiver 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.

In one embodiment of the present invention, the module controller is configured to set one adjacent pair of the first wireless transceiver, the second wireless transceiver, the third wireless transceiver, and the fourth wireless transceiver to operate in a transmit mode and the other adjacent pair of the wireless transceivers to operate in a receive mode when the LED display screen is in the connected configuration, such that the plurality of display cabinets automatically determine the position coordinates in the LED display screen.

In another aspect, an LED display system provided in an embodiment of the present invention includes: any one of the aforementioned LED display screens; and the system controller is used for receiving and processing the input video source to obtain an image data signal and is provided with a fifth wireless transceiver. The fifth wireless transceiver is used for transmitting image data signals with one of the first wireless transceiver, the second wireless transceiver, the third wireless transceiver and the fourth wireless transceiver of a first-level display box body of the plurality of display box bodies, wherein the one of the first-level display box bodies, the second wireless transceiver, the third wireless transceiver and the fourth wireless transceiver is adjacent to and opposite to the fifth wireless transceiver, and the working frequency of the fifth wireless transceiver is located in the millimeter wave frequency band.

The LED display system of this embodiment not only has realized through the wireless transceiver of work at the millimeter wave frequency channel that wireless cascade between display box and the display box 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.

In another aspect, an embodiment of the present invention provides a display box, including: the rectangular box body frame is provided with a first side surface, a second side surface, a third side surface, a fourth side surface and an accommodating space enclosed by the first side surface, the second side surface, the third side surface and the fourth side surface; wherein the first side and the third side are opposite sides, and the second side and the fourth side are opposite sides; the LED display unit is arranged on the rectangular box body frame; the module controller is arranged in the accommodating space and electrically connected with the LED display unit so as to drive and control the LED display unit to display images; and the first wireless transceiver, the second wireless transceiver, the third wireless transceiver and the fourth wireless transceiver are respectively arranged on the first side surface, the second side surface, the third side surface and the fourth side surface and are electrically connected with the module controller, and the working frequency of the first wireless transceiver, the second wireless transceiver, the third wireless transceiver and the fourth wireless transceiver is in the frequency range of 57-67 GHZ or 71-87 GHZ. .

In summary, the above technical solutions of the embodiments of the present invention may have one or more of the following advantages: through install the wireless transceiver that operating frequency is located the millimeter wave frequency channel respectively to the fourth side of each display box in LED display screen, it can utilize each wireless transceiver automatic determination to show the position coordinate of box in whole LED display screen, can realize the wireless cascade between the display box from this to can simplify the connection configuration operation of LED display screen, and show the time cost and the cost of labor who has reduced installation, dismantlement, maintenance display box. Furthermore, the specific circuit design of each wireless transceiver is advantageous for providing a stable and reliable wireless connection.

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 connection relationship between the module controller and the LED display unit in the single display cabinet shown in fig. 1.

Fig. 3A and 3B are schematic circuit board layout diagrams of the wireless transceiver shown in fig. 1.

FIGS. 4A and 4B are schematic diagrams of alternative circuit board front and back component layouts for the wireless transceiver of FIG. 1

Fig. 5 is a schematic diagram illustrating a result of connection configuration performed on an LED display screen according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of an LED display system according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of an 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; 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 box frame 11, an LED display unit 13, a module controller 15 and four wireless transceivers 17 a-17 d.

The box frame 11 has four side surfaces S1 to S4 and an accommodating space 110 surrounded by the four side surfaces S1 to S4, for example, the box frame 11 is a rectangular (including square) hollow structure; side S1 and side S3 are opposing sides, and side S2 and side S4 are opposing sides.

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. As shown in fig. 2, as a non-limiting embodiment, the module controller 15 is provided with a transceiver interface set 150 and a module interface set 152, for example, and each LED module 130 in the LED display unit 13 is electrically connected to the module interface set 152 by a flat cable connection or a board-to-board connection, for example. Typically, the module controller 15 may employ a two-layer circuit board design of core board + interposer, with the module interface set 152 disposed on the interposer, and the transceiver interface set 150 disposed on the core board, or disposed on the interposer, or with a portion of the transceiver interfaces disposed on the core board and another portion of the transceiver interfaces disposed on the interposer. For the core board, the main circuit elements of the core board include a programmable logic device, and a microcontroller and a memory device electrically connected to the programmable logic device, but the embodiment of the invention is not limited thereto.

Referring again to fig. 1 and 2, the wireless transceivers 17a to 17d are respectively provided on the four side surfaces S1 to S4 of the cabinet frame 11. The operating frequency of each of the wireless transceivers 17a to 17d is 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 transceivers 17a to 17d working in the millimeter wave frequency band of this embodiment are very suitable for the application of the display boxes in the LED display screen, because the LED display screen is typically formed by splicing a plurality of display boxes, when the wireless transceivers 17a to 17d are installed in each display box, the problem to be considered is how to avoid the wireless signal crosstalk and unstable transmission between the wireless transceivers that do not need to receive and transmit data in the same LED display screen and easily blocked by obstacles, and the wireless transceivers 17a to 17d of this embodiment work in the millimeter wave frequency band, compared with the wireless transceivers in the prior art, such as WiFi modules and bluetooth modules, the possibility of wireless signal crosstalk can be greatly reduced, and compared with the infrared transceivers, the transmission is stable and is not easily blocked by obstacles. Furthermore, based on the performance of the wireless chip and the easy availability of the frequency band, the operating frequency of the wireless transceivers 17a to 17d is preferably in the frequency range of 57GHZ-67GHZ or 71GHZ-87GHZ, such as 60GHZ or 80 GHZ.

Referring to fig. 3A and 3B, in one non-limiting embodiment, any of the wireless transceivers 17 a-17 d includes, for example: a circuit board 170, and an ethernet interface 171, a physical layer transceiver 173, a wireless transmitting chip Tx, and a wireless receiving chip Rx disposed on the circuit board 170. The ethernet interface 171 is electrically connected to the physical layer transceiver 173 and is connected to the transceiver interface set 150 of the module controller 15 via a cable, for example, a network cable, and accordingly the transceiver interface set 150 has, for example, four ethernet interfaces in this embodiment. The ethernet interface 171 is an RJ45 integrated with the network transformer, or a RJ separated design from the network transformer. The wireless transmitting chip Tx and the wireless receiving chip Rx are electrically connected to the physical layer transceiver 173, respectively. Further, to improve the signal transmission stability and transmission rate, the wireless transmitting chip Tx is electrically connected to the physical layer transceiver 173 through a differential signal line pair, for example, two SerDes (Serializer and Deserializer) differential signal lines are electrically connected to the physical layer transceiver 173; similarly, the wireless reception chip Rx is electrically connected to the physical layer transceiver 173 through a differential signal line pair, for example, the physical layer transceiver 173 is electrically connected through two SerDes differential signal lines. Accordingly, the 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 physical layer transceiver 173. The PHY transceiver 173 may be a 1GBase-T/2.5GBase-T/5GBase-T/10GBase-T Ethernet PHY transceiver. 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.

As mentioned above, circuit board 170 has first and second opposing

sides

170a, 170b, and Ethernet interface 171 and physical layer transceiver 173 are 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 here is connected to the transceiver interface group 150 of the module controller 15 by, for example, a flat cable. As can also be seen from fig. 3A, the wired power interface 175 and the physical layer transceiver 173 are located on opposite sides of the ethernet interface 171 in the length direction of the circuit board 170 (in the longitudinal direction of fig. 3A). 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 phy transceiver 173, the wireless transmitting chip Tx and the wireless receiving chip Rx to provide the required operating voltages for the respective chips.

In fig. 3B, the wireless transmitting chip Tx and the wireless receiving chip Rx are disposed on the second side 170B of the circuit board 170, and as can be seen in conjunction with fig. 3A and 3B, the wireless transmitting chip Tx and the wireless receiving chip Rx are located on 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. The operating frequencies of the wireless transmitting chip Tx and the wireless receiving chip Rx are located in the millimeter wave frequency band, for example, specifically located in the frequency range 57GHZ-67GHZ or 71GHZ-87 GHZ.

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.

Referring to fig. 4A and 4B, in another non-limiting embodiment, any of the wireless transceivers 17 a-17 d includes, for example: a circuit board 270, and a dc-dc circuit 271, a wireless transmitting chip Tx, and a wireless receiving chip Rx disposed on the circuit board 270. The circuit board 270 is provided with a pad set 2701, and the pad set 2701 is electrically connected to one end of a cable, such as a USB3.0 line, for transmitting data signals and power signals, and the other end of the cable, such as the USB3.0 line, is connected to the transceiver interface set 150 of the module controller 15; it should be noted that, in this embodiment, the number of pads in the pad group 2701 in fig. 4A is only an example, and is not intended to limit the present invention; accordingly, the transceiver interface group 150 in the present exemplary embodiment has, for example, four USB3.0 interfaces, such as four micro USB3.0 interfaces. The dc-dc circuit 271 is electrically connected to the pad set 2701 to obtain a power signal, and for example, a power management chip (PMIC) is used. The wireless transmission chip Tx is electrically connected to the pad group 2701 for receiving a data signal from the pad group 2701, and the wireless reception chip Rx is electrically connected to the pad group 2701 for transferring a data signal to the pad group 2701. The operating frequencies of the wireless transmitting chip Tx and the wireless receiving chip Rx are located in the millimeter wave frequency 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. Furthermore, based on the performance of the wireless chip and the easy availability of the frequency band, in this embodiment, it is preferable that the millimeter wave frequency band in which the wireless transmitting chip Tx operates is 57GHZ-67GHZ or 71GHZ-87GHZ, for example, the wireless transmitting chip Tx operates at 60GHZ or 80 GHZ; similarly, the millimeter wave frequency band of the wireless receiving chip Rx is 57GHZ-67GHZ, or 71GHZ-87GHZ, for example, the wireless receiving chip Rx operates at 60GHZ or 80 GHZ. In addition, it is worth mentioning that the present embodiment performs the data wireless transmission and the data wireless reception by two independent chips, which can effectively ensure the stability and reliability of data reception and transmission.

As mentioned above, the circuit board 270 has opposing first and

second sides

270a, 270 b. The pad set 2701 and the dc-dc converter circuit 271 are disposed on the first side 270a of the circuit board 270, and the wireless transmitting chip Tx and the wireless receiving chip Rx are disposed on the second side 270b of the circuit board 270 at intervals. The wireless transmitting chips Tx and the wireless receiving chips Rx are arranged at intervals in the length direction of the circuit board 270 (in the longitudinal direction of fig. 4B), and it is known through experiments that the distance between the geometric center of the wireless transmitting chip Tx and the geometric center of the wireless receiving chip Rx is preferably greater than 10 mm, for example, 15 mm, so as to reduce crosstalk between the wireless transmitting chip Tx and the wireless receiving chip Rx as much as possible and ensure good wireless communication. Furthermore, the wireless transmitting chip Tx and the wireless receiving chip Rx are electrically connected to the pad group 2701 through a differential signal line pair, for example, SerDes differential signal lines, respectively, for example, the wireless transmitting chip Tx is connected to one pair of differential signal pads in the pad group 2701 through two differential signal lines, and the wireless receiving chip Rx is connected to the other pair of differential signal pads in the pad group 2701 through two differential signal lines; the differential signal line pair is used for realizing the connection with the wireless transmitting chip Tx and the wireless receiving chip Rx, so that the speed and the stability of data transmission can be effectively improved. In addition, the annular wave-absorbing

material elements

273 and 275 can further reduce the signal crosstalk between the wireless transmitting chip Tx and the wireless receiving chip Rx, and enhance the wireless communication capability of the chip. The annular wave-absorbing material element 273 is fixed on the circuit board 270 and disposed around the wireless receiving chip Rx, 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 273, that is, the wireless receiving chip Rx is not disposed centrally; the annular wave-absorbing material element 273 of the embodiment is made of Lidar JCS-9 type wave-absorbing material, for example. Similarly, the annular wave-absorbing material element 275 is fixed on the circuit board 270 and disposed around the wireless transmitting chip Tx, and preferably, in order to prevent the antenna signal affecting the built-in antenna of the wireless transmitting chip Tx, the wireless transmitting chip Tx is disposed eccentrically in the central hole of the annular wave-absorbing material element 275, i.e., the wireless transmitting chip Tx is not disposed centrally; the annular wave-absorbing material element 275 of this embodiment is made of, for example, Lidar JCS-9 type wave-absorbing material. By way of non-limiting example, the wireless transmitting chip Tx and the wireless receiving chip Rx of the present embodiment may be KQG104-B3 series chips commercially available, but may also be other wireless transmitting and receiving chips suitable for operating in the millimeter wave band.

In addition, the inventor tests that the signal transmission reliability is highest when the communication distance between two adjacent and opposite wireless transceivers for wirelessly transmitting image data signals between two adjacent display boxes 10 is kept to be not more than 30 mm, and no obvious code missing 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 and learns that the delay of the wireless transmission performed by the wireless transceivers 17a to 17d of the present embodiment can be kept within 500 picoseconds, which is equivalent to the delay of the transmission of the conventional network cable, and obviously the requirements of connection, design and installation of the LED display screen are completely met.

Referring to fig. 5, a process of connecting a plurality of display cases 10 in an LED display panel for configuration will be described below by way of example.

(1) Initializing position coordinates: each display box 10 is powered on and enters the connection configuration mode, and the position coordinates of itself are initialized to (0,0), for example, the position coordinates of six display boxes 10 in fig. 5 are all initialized to (0, 0).

(2) Position coordinate assignment: the module controller 15 (refer to fig. 1) in each display cabinet 10 sets, for example, the

wireless transceivers

17a, 17d on the first side S1 and the fourth side S4 adjacent to itself to operate in the transmission mode, and sets the

wireless transceivers

17b, 17c on the second side S2 and the third side S3 adjacent to itself to operate in the reception mode. Next, the wireless transceiver 17a periodically transmits the position coordinates of the display box 10 to the right for multiple times, for example, M times, within a preset time period, so as to be received by the wireless transceiver 17c of the horizontally adjacent display box 10, so as to realize the assignment of the column coordinates, where M is greater than the number of columns of the display boxes 10 in the LED display screen; and the wireless transceiver 17d periodically transmits the position coordinates of the display cabinet 10 to the wireless transceiver 17b of the vertically adjacent display cabinet 10 downward multiple times, such as N times, within a preset time period, to realize the assignment of the line coordinates, where N is greater than the number of lines of the display cabinet 10 in the LED display screen.

For example, taking the middle display box 10 in the second row in fig. 5 as an example, the position coordinates (C, R) are initialized to (0,0), and after the first time position coordinates (0,0) sent by the adjacent left display box 10 are received for the first time, 1 is added to the column coordinates of the received position coordinates to give the own coordinates, so that the column coordinates C in the position coordinates (C, R) are updated to 1; similarly, after it receives the first position coordinate (0,0) transmitted from the adjacent upper display box 10 for the first time, it adds 1 to the row coordinate of the received position coordinate to give it its position coordinate, so that the row coordinate R in its position coordinates (C, R) is updated to 1. In this way, the position coordinates (C, R) are updated to (1, 1).

Then, it will successively receive the second time position coordinate, the third time position coordinate, …, the mth time position coordinate sent from the adjacent left display box 10, and successively receive the second time position coordinate, the third time position coordinate, …, the nth time position coordinate sent from the adjacent upper display box 10, and perform the position coordinate assignment operation according to the following rules: if the next position coordinate (such as the second position coordinate) sent by the adjacent left display box body is the same as the column coordinate of the sent previous position coordinate (such as the first position coordinate), the column coordinate C in the position coordinates (C, R) is kept unchanged, otherwise, if the column coordinates are different, 1 is added to the column coordinate of the next position coordinate and the column coordinate is given to the position coordinate of the left display box body; similarly, if the subsequent position coordinate (for example, the second position coordinate) of the adjacent upper display box is the same as the row coordinate of the previous position coordinate (for example, the first position coordinate), the row coordinate R in the position coordinates (C, R) remains unchanged, whereas if the subsequent position coordinate is different from the first position coordinate, 1 is added to the row coordinate of the subsequent position coordinate, and the subsequent position coordinate is given to the own position coordinate. Thus, after the preset time period ends or the number of times of sending the position coordinates reaches a sufficient number of times, for example, 100 times, the position coordinates of six display boxes 10 in the LED display screen may present the result as shown in fig. 5, then the module controller 15 sets the wireless transceivers 17a to 17d in each display box 10 to operate in the transceiving mode, and after the position coordinates of each display box 10 are uploaded to the front-end system (e.g., the system controller) in combination with the resolution information, the front-end system may generate the topology information of the LED display screen according to the acquired position coordinate information, thereby generating the configuration parameters of the LED display screen and sending the configuration parameters to each display box 10 in the LED display screen, where the generation of the topology information of the display screen according to the position coordinate information is a mature technology, and therefore, it is not described in detail herein. By way of non-limiting example, the configuration parameters issued herein include, for example, the position coordinates and corresponding sequence numbers (e.g., sn 1-sn 6) of each display box, and even the orientation number of the wireless transceiver to be disabled. Therefore, the connection configuration work of each display box 10 in the LED display screen can be completed, and the wireless cascade connection among a plurality of display boxes 10 is realized.

In summary, in the embodiments of the present invention, the wireless transceivers with the operating frequencies located in the millimeter wave frequency band are respectively installed on the first to fourth sides of each display box in the LED display screen, and the wireless transceivers can be used to automatically determine the position coordinates of the display box in the whole LED display screen, so that the wireless cascade connection between the display boxes can be implemented, the connection configuration operation of the LED display screens can be simplified, and the time cost and the labor cost for installing, disassembling, and maintaining the display boxes can be significantly reduced. Furthermore, the specific circuit design of each wireless transceiver is advantageous for providing a stable and reliable wireless connection. The LED display screen 100 of the present embodiment is suitable for LED televisions, rentals, high-end fixtures, LED conference screens, digital signage, and other fields.

Referring to fig. 6, 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 transceiver 210 and is used to receive and process an input video source to transmit an image data signal through the wireless transceiver 210 to a target wireless transceiver (e.g., the wireless transceiver 17c of the leftmost display cabinet shown in fig. 6) of a first-level display cabinet among the plurality of display cabinets 10 cascaded in the LED display screen 100. The operating frequency of the wireless transceiver 210 is located in a millimeter wave frequency band, and it may adopt the circuit structure shown in fig. 3A and 3B or the circuit structure shown in fig. 4A and 4B, and is used to convert an electrical signal into an electromagnetic signal to be wirelessly transmitted to the LED display screen 100, or convert an electromagnetic signal wirelessly input from the LED display screen 100 into an electrical signal.

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 here is, for example, an RJ45 network interface integrated into a network transformer or a RJ45 separated design using a network transformer. In other embodiments, the ethernet physical layer transceiver and the ethernet interface may be replaced by a USB3.0 interface, such as a micro USB3.0 interface, connected to the FPGA.

As can be seen from a comparison between fig. 6 and fig. 7, the plurality of cascaded display boxes 10 carried by the system controller 200 in the LED display system are not limited to be arranged in a single row, but may be arranged in a plurality of rows, for example, two rows as shown in fig. 7.

In conclusion, the LED display system of this embodiment not only realizes wireless connection between the display box and the display box, but also realizes wireless connection between the system controller 200 and the display box, which greatly simplifies the connection convenience of each module in the display system, and significantly reduces the time cost and labor cost for installing, disassembling, and maintaining the display box.

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. It should be noted that the transceiver interface group 150 is not limited to have four ethernet interfaces or four USB3.0 interfaces, but may be any number of combinations of ethernet interfaces and USB3.0 interfaces, such as two ethernet interfaces and two USB3.0 interfaces, but the total number is four.

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

1. An LED display screen, comprising: a plurality of cascaded display boxes; each of the display cases includes:

the box body frame is provided with a first side surface, a second side surface, a third side surface, a fourth side surface and an accommodating space enclosed by the first side surface, the second side surface, the third side surface and the fourth side surface; wherein the first side and the third side are opposite sides, and the second side and the fourth side are opposite sides;

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 and electrically connected with the LED display unit so as to drive and control the LED display unit to display images; and

the first wireless transceiver, the second wireless transceiver, the third wireless transceiver and the fourth wireless transceiver are respectively arranged on the first side, the second side, the third side and the fourth side and are electrically connected with the module controller, the operating frequencies of the first wireless transceiver, the second wireless transceiver, the third wireless transceiver and the fourth wireless transceiver are located in a millimeter wave frequency band, and the front-stage display boxes of two adjacent display boxes in the cascaded multiple display boxes are connected with the first wireless transceiver, the second wireless transceiver, the third wireless transceiver and the fourth wireless transceiver through one target wireless transceiver in the cascaded multiple display boxes, One of the second wireless transceiver, the third wireless transceiver and the fourth wireless transceiver, which is adjacent to and opposite to the target wireless transceiver, wirelessly transmits image data signals.

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 a communication distance between the target wireless transceiver and the wireless transceiver adjacent to and opposite the target wireless transceiver is less than or equal to 30 millimeters.

4. The LED display screen of claim 1, wherein the wireless transceiver comprises: the wireless transmission device comprises a circuit board, and an Ethernet interface, a physical layer transceiver, a wireless transmission chip and a wireless receiving chip which are arranged on the circuit board; the Ethernet interface is electrically connected with the physical layer transceiver and the module controller through a network cable, and the wireless transmitting chip and the wireless receiving chip are electrically connected with the physical layer transceiver through a SerDes differential signal wire pair respectively.

5. The LED display screen of claim 4, wherein the wireless transceiver further comprises a wired power interface, and the wired power interface is wired to the module controller; the Ethernet interface, the physical layer transceiver and the wired power interface are positioned on a first side of the circuit board, and the wireless transmitting chip and the wireless receiving chip are positioned on a second side of the circuit board, which is opposite to the first side, and are arranged at intervals in the length direction of the circuit board; the Ethernet interface is positioned between the wireless transmitting chip and the wireless receiving chip in the length direction of the circuit board, and the working frequency of the wireless transmitting chip and the working frequency of the wireless receiving chip are positioned in the millimeter wave frequency band.

6. The LED display screen of claim 1, wherein the wireless transceiver comprises: the wireless transmission device comprises a circuit board, and a direct current-to-direct current circuit, a wireless transmission chip and a wireless receiving chip which are arranged on the circuit board; the circuit board is provided with a pad group, the pad group is electrically connected with one end of a cable for transmitting data signals and power signals, and the other end of the cable is electrically connected with the module controller; the direct current-to-direct current circuit is electrically connected with the pad group to obtain a power supply signal, the wireless transmitting chip is electrically connected with the pad group through a SerDes differential signal line pair to be used for receiving a data signal from the pad group, and the wireless receiving chip is electrically connected with the pad group through another SerDes differential signal line pair to be used for transmitting the data signal to the pad group; the wireless transmitting chip and the wireless receiving chip are arranged at intervals in the length direction of the circuit board, and the working frequency of the wireless transmitting chip and the working frequency of the wireless receiving chip are located in the millimeter wave frequency band.

7. The LED display screen of claim 4, 5 or 6, wherein the wireless transceiver 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.

8. The LED display screen of claim 1, wherein the module controller is configured to set one adjacent pair of the first wireless transceiver, the second wireless transceiver, the third wireless transceiver, and the fourth wireless transceiver to operate in a transmit mode and the other adjacent pair of the wireless transceivers to operate in a receive mode when the LED display screen is in the connected configuration such that the plurality of display bins automatically determine the position coordinates in the LED display screen.

9. An LED display system, comprising:

the LED display screen of any one of claims 1 to 8; and

the system controller is used for receiving and processing an input video source to obtain an image data signal, and is provided with a fifth wireless transceiver, wherein the fifth wireless transceiver is used for carrying out image data signal transmission with one wireless transceiver which is adjacent and opposite to the fifth wireless transceiver in the first-level display box body, the second wireless transceiver, the third wireless transceiver and the fourth wireless transceiver in the plurality of display box bodies, and the working frequency of the fifth wireless transceiver is located in the millimeter wave frequency band.

10. A display cabinet, comprising:

the rectangular box body frame is provided with a first side surface, a second side surface, a third side surface, a fourth side surface and an accommodating space enclosed by the first side surface, the second side surface, the third side surface and the fourth side surface; wherein the first side and the third side are opposite sides, and the second side and the fourth side are opposite sides;

the LED display unit is arranged on the rectangular box body frame;

the first wireless transceiver, the second wireless transceiver, the third wireless transceiver and the fourth wireless transceiver are respectively arranged on the first side surface, the second side surface, the third side surface and the fourth side surface and are electrically connected with the module controller, and the working frequency of the first wireless transceiver, the second wireless transceiver, the third wireless transceiver and the fourth wireless transceiver is in the frequency range of 57-67 GHZ or 71-87 GHZ.