CN217406647U

CN217406647U - LED screen synchronous and asynchronous playing switching device

Info

Publication number: CN217406647U
Application number: CN202121682402.6U
Authority: CN
Inventors: 王星辰; 谢志君
Original assignee: Shenzhen Huidu Technology Co ltd
Current assignee: Shenzhen Huidu Technology Co ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2022-09-09
Anticipated expiration: 2031-07-22

Abstract

The embodiment of the utility model discloses LED screen is with asynchronous broadcast auto-change over device, include: a synchronization input for inputting an external first video stream; an asynchronous input for inputting an internal second video stream; and the control module is connected with the synchronous input end and the asynchronous input end and is used for generating a switching signal according to the first video stream or the second video stream and playing videos and audios after processing the first video stream or the second video stream. The utility model provides a pair of LED screen has realized automatic switch-over with asynchronous broadcast interface through built-in chip with asynchronous broadcast auto-change over device, has solved among the prior art and has realized the problem that need change the interface when switching over with asynchronous broadcast, has realized full automatic switch-over broadcast, has promoted user's experience.

Description

LED screen synchronous and asynchronous playing switching device

Technical Field

The embodiment of the utility model provides a relate to technique LED display screen technique, especially relate to a LED screen is with asynchronous broadcast auto-change over device.

Background

In the technical field of LED display screen control, the LED display screen control system can be divided into a synchronous control LED display screen system and an asynchronous control LED display screen system according to different control modes. The synchronous control LED display screen system is used for mapping a picture displayed on a PC (personal computer) to an LED display screen in real time for displaying, and comprises the PC, a sending card, a receiving card and the LED display screen which are sequentially connected. The asynchronous control LED display screen system is characterized in that a playing medium is placed on an asynchronous LED display controller (or called asynchronous LED display control card or media playing box) through a U disk, a serial port, an SD card or a network, the asynchronous LED display controller is equivalent to a PC (personal computer) and a sending card in the synchronous control LED display screen system and can perform control display by itself, and the media do not need to be externally connected with the PC when being played.

SUMMERY OF THE UTILITY MODEL

The utility model provides a LED screen is with asynchronous broadcast auto-change over device in order to realize full automatic switch-over broadcast, has promoted user's experience.

A kind of LED screen is with the asynchronous broadcast auto-change over device, including:

a synchronization input for inputting an external first video stream;

an asynchronous input for inputting an internal second video stream;

and the control module is connected with the synchronous input end and the asynchronous input end and is used for generating a switching signal according to the first video stream or the second video stream and playing videos and audios after processing the first video stream or the second video stream.

Optionally, the synchronization input end is connected to an external device, and is configured to transmit a first video stream input by the external device.

Optionally, the synchronous input end is an HDMI interface.

Optionally, the asynchronous input terminal is a ROM memory.

Optionally, the control module includes a CPU processor, a control chip and an FPGA, the CPU processor is configured to process the first video stream or the second video stream, generate a video signal, transmit the video signal to the FPGA, process the video signal, and generate the switching signal, and the control chip is configured to control the first video stream or the second video stream to output an audio signal according to the switching signal.

Optionally, the switching signal is an I/O control signal, and the I/O control signal is used to control an input condition of the control chip.

Optionally, when the input is a first video stream, accessing is performed through a first channel of the control chip; and when the input is a second video stream, accessing through a second channel of the control chip.

Optionally, when the input is a first video stream, the first audio data separated from the first video stream is processed after passing through the first channel of the control chip; and when the input is a second video stream, processing second audio data separated from the second video stream after passing through a second channel of the control chip.

Optionally, the apparatus further includes an audio player, and the audio player is configured to play the first audio data or the second audio data.

Optionally, the display device further includes a display screen, and the display screen is configured to display the first video data separated from the first video stream or display the second video data separated from the second video stream.

Drawings

Fig. 1 is a schematic structural diagram of a synchronous/asynchronous play switching device for an LED screen according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a switching device for synchronous and asynchronous playing of an LED screen provided by the second embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.

Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the steps as a sequential process, many of the steps can be performed in parallel, concurrently or simultaneously. In addition, the order of the steps may be rearranged. A process may be terminated when its operations are completed, but may have additional steps not included in the figure. A process may correspond to a method, a function, a procedure, a subroutine, a subprogram, etc.

Furthermore, the terms "first," "second," and the like may be used herein to describe various orientations, actions, steps, elements, or the like, but the orientations, actions, steps, or elements are not limited by these terms. These terms are only used to distinguish one direction, action, step or element from another direction, action, step or element. For example, a first module may be termed a second module, and, similarly, a second module may be termed a first module, without departing from the scope of the present application. The first module and the second module are both modules, but they are not the same module. The terms "first", "second", etc. are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Example one

Fig. 1 is the embodiment of the utility model provides a pair of LED screen is with asynchronous broadcast auto-change over device's structural schematic diagram, the embodiment of the utility model provides a pair of LED screen is applicable to the condition of switching with asynchronous broadcast auto-change over device, specifically, the embodiment of the utility model provides a pair of LED screen includes with asynchronous broadcast auto-change over device: synchronous input 1, asynchronous input 2 and control module 3.

The synchronization input 1 is used for inputting an external first video stream.

In this embodiment, the synchronous playing means that the display content of the LED display screen can synchronously reflect the display content of the CRT display of the computer in real time. The maximum control pixel limit of a control system sending card in a synchronous control mode is 1280 points multiplied by 1024 points. The receiving card in the full-color screen control system is preferably a receiving card in one box body. Specifically, in this embodiment, the synchronization input terminal 1 is connected to an external device, and is configured to transmit a first video stream input by the external device. The external device may be a computer, a smart phone, a tablet computer, or other intelligent devices, which is not specifically limited in this embodiment, and may be adjusted in applicability according to user requirements. The first video stream is input through a synchronization input terminal 1, the synchronization input terminal 1 is an HDMI Interface, and a High Definition Multimedia Interface (HDMI [1]) is a full digital video and audio transmission Interface, and can transmit uncompressed audio and video signals. The HDMI can be used for set-top boxes, DVD players, personal computers, televisions, game hosts, comprehensive amplifiers, digital stereos, televisions and other equipment. HDMI can send audio frequency and video signal simultaneously, because audio frequency and video signal adopt same wire rod, simplifies the installation degree of difficulty of system's circuit greatly.

The asynchronous input 2 is used for inputting an internal second video stream.

In this embodiment, the asynchronous control means that the computer sends the edited content to the receiving card of the display screen through the communication program, and the receiving card (with a memory) stores the content and then circularly plays the content according to the order, display mode, dwell time, and the like edited by the computer. The maximum control pixel limit of the control system of the indoor screen in the asynchronous control mode is 2048 points x 256 points. The maximum control pixel limit of the control system of the asynchronous control mode outdoor screen is 2048 points multiplied by 128 points. The screen body surfaces are completely the same in the synchronous control mode and the asynchronous control mode, and the basic display functions are the same. The main differences are as follows: the asynchronous display screen does not need to be connected with a computer at ordinary times, the display screen is provided with a built-in CPU, a plurality of pictures can be stored when the display screen is powered off, and the asynchronous display screen can be separated from the computer to run independently. Some screens are also provided with clock chips which can automatically display calendars and clocks. When the display content needs to be modified, the display content can be modified by connecting the microcomputer through an RS232 interface. Specifically, the asynchronous input terminal 2 is a ROM Memory, and a Read-Only Memory (ROM) works in a non-destructive reading mode, and Only can Read information but cannot write information. Information is fixed after being written once, and even if the power is turned off, the information is not lost, so that the information is also called a fixed memory. The data stored in the ROM is usually written before being loaded into the whole machine, and the data can only be read out in the working process of the whole machine, unlike the random access memory which can quickly and conveniently rewrite the stored content. The ROM has stable data, the stored data can not be changed after power failure, and the structure is simple, the use is convenient, thus being commonly used for storing various fixed programs and data.

The control module 3 is connected to the synchronous input terminal 1 and the asynchronous input terminal 2, and is configured to generate a switching signal according to the first video stream or the second video stream, process the first video stream or the second video stream, and then play video and audio.

In this embodiment, the control module 3 includes a CPU processor, a control chip and an FPGA, the CPU processor is configured to process the first video stream or the second video stream, generate a video signal, transmit the video signal to the FPGA, process the video signal, and generate the switching signal, and the control chip is configured to control the first video stream or the second video stream to output an audio signal according to the switching signal. A Central Processing Unit (CPU) is a final execution unit for information processing and program operation, and serves as an operation and control core of a computer system. The CPU processor is directly connected with the synchronous input end 1 and the asynchronous input end 2, and transmits the video signal to the FPGA for processing and then displaying and playing. FPGA (field Programmable Gate array) is a product of further development on the basis of Programmable devices such as PAL, GAL and the like. The circuit is a semi-custom circuit in the field of Application Specific Integrated Circuits (ASIC), not only overcomes the defects of the custom circuit, but also overcomes the defect that the number of gate circuits of the original programmable device is limited. The control chip is a control chip with the model number of TS3A5018PWR, specifically, the EN end of the TS3A5018PWR is grounded, and channels are switched through I/O control signals. When the input is a first video stream, accessing through a first channel of the control chip; and when the input is a second video stream, accessing through a second channel of the control chip. When the input is a first video stream, processing first audio data separated from the first video stream after passing through a first channel of the control chip; and when the input is a second video stream, processing second audio data separated from the second video stream after passing through a second channel of the control chip.

In this embodiment, a CPU processor generates a switching signal to switch a first video stream or a second video stream, where the switching signal is an I/O control signal, and the I/O control signal is used to control an input condition of the control chip. The control between the CPU and the disk is mainly realized through an I/O controller, and a status register is used for recording the current status of the I/O device, wherein 1 represents idle, and 0 represents busy.

Example two

Fig. 2 is the utility model provides a pair of the structure schematic diagram that LED screen is with asynchronous broadcast auto-change over device that provides, the embodiment of the utility model provides a pair of LED screen is applicable to the condition of switching with asynchronous broadcast auto-change over device, specifically, the embodiment of the utility model provides a pair of LED screen includes with asynchronous broadcast auto-change over device: synchronous input 1, asynchronous input 2, control module 3, audio player 4 and display screen 5.

The sync input 1 is used for inputting an external first video stream.

In this embodiment, the synchronous playback means that the display content of the LED display screen can synchronously reflect the display content of the CRT monitor of the computer in real time. The maximum control pixel limit of a control system sending card in a synchronous control mode is 1280 points multiplied by 1024 points. The receiving card in the full-color screen control system is preferably a receiving card in one box body. Specifically, in this embodiment, the synchronization input terminal 1 is connected to an external device, and is configured to transmit a first video stream input by the external device. The external device may be a computer, a smart phone, a tablet computer, or other intelligent devices, which is not specifically limited in this embodiment, and may be adjusted in applicability according to user requirements. The first video stream is input through a synchronization input terminal 1, the synchronization input terminal 1 is an HDMI Interface, and a High Definition Multimedia Interface (HDMI [1]) is a full digital video and audio transmission Interface, and can transmit uncompressed audio and video signals. The HDMI can be used for set-top boxes, DVD players, personal computers, televisions, game hosts, comprehensive amplifiers, digital stereos, televisions and other equipment. HDMI can send audio frequency and video signal simultaneously, because audio frequency and video signal adopt same wire rod, simplifies the installation degree of difficulty of system's circuit greatly.

The asynchronous input 2 is used for inputting an internal second video stream.

In this embodiment, asynchronous control means that the computer sends the edited content to the receiving card of the display screen through a communication program, and the receiving card (with a memory) stores the content and then cyclically plays the content according to the order, display mode, dwell time, and the like edited by the computer. The maximum control pixel limit of the control system of the indoor screen in the asynchronous control mode is 2048 points x 256 points. The maximum control pixel limit of the control system of the asynchronous control mode outdoor screen is 2048 points multiplied by 128 points. The screen body surfaces are completely the same in the synchronous control mode and the asynchronous control mode, and the basic display functions are the same. The main differences are as follows: the asynchronous display screen does not need to be connected with a computer at ordinary times, the display screen is provided with a built-in CPU, a plurality of pictures can be stored when the display screen is powered off, and the asynchronous display screen can be separated from the computer to run independently. Some screens are also provided with clock chips which can automatically display calendars and clocks. When the display content needs to be modified, the display content can be modified by connecting the microcomputer through an RS232 interface. Specifically, the asynchronous input terminal 2 is a ROM Memory, and a Read-Only Memory (ROM) works in a non-destructive reading mode, and Only can Read information but cannot write information. Information is fixed after being written once, and even if the power is turned off, the information is not lost, so that the information is also called a fixed memory. The data stored in the ROM is usually written before being loaded into the whole machine, and the data can only be read out in the working process of the whole machine, unlike the random access memory which can quickly and conveniently rewrite the stored content. The ROM has stable data, the stored data can not be changed after power failure, and the ROM has simple structure and convenient use, thereby being used for storing various fixed programs and data.

In this embodiment, the control module 3 includes a CPU processor, a control chip and an FPGA, the CPU processor is configured to process the first video stream or the second video stream, generate a video signal, transmit the video signal to the FPGA, process the video signal, and generate the switching signal, and the control chip is configured to control the first video stream or the second video stream to output an audio signal according to the switching signal. A Central Processing Unit (CPU) is used as an operation and control core of a computer system, and is a final execution unit for information processing and program operation. The CPU processor is directly connected with the synchronous input end 1 and the asynchronous input end 2, and transmits the video signal to the FPGA for processing and then displaying and playing. FPGA (field Programmable Gate array) is a product of further development based on Programmable devices such as PAL, GAL and the like. The circuit is a semi-custom circuit in the field of Application Specific Integrated Circuits (ASIC), not only overcomes the defects of the custom circuit, but also overcomes the defect that the number of gate circuits of the original programmable device is limited. The control chip is a control chip with the model number of TS3A5018PWR, specifically, the EN end of the TS3A5018PWR is grounded, and channels are switched through I/O control signals. When the input is a first video stream, accessing through a first channel of the control chip; and when the input is a second video stream, accessing through a second channel of the control chip. When the input is a first video stream, processing first audio data separated from the first video stream after passing through a first channel of the control chip; and when the input is a second video stream, processing second audio data separated from the second video stream after passing through a second channel of the control chip.

In this embodiment, a CPU generates a switching signal to switch a first video stream or a second video stream, where the switching signal is an I/O control signal, and the I/O control signal is used to control an input condition of the control chip. The control between the CPU and the disk is mainly realized through an I/O controller, and a status register is used for recording the current status of the I/O device, wherein 1 represents idle, and 0 represents busy.

In this embodiment, the audio device further includes an audio player 4, where the audio player 4 is configured to play the first audio data or the second audio data.

Specifically, the audio player 4 may be a speaker or other playing device, and the effect of synchronous or asynchronous playing is achieved by outputting the first audio data or the second audio data through the audio player 4.

In this embodiment, the display device further includes a display screen 5, and the display screen 5 is configured to display first video data of the first video stream separation or display second video data of the second video stream separation.

Specifically, the display screen 5 is an LED screen, the LED display screen 5 is an electronic display screen 5 formed by an LED dot matrix, the display content forms of the screen, such as characters, animations, pictures and videos, are changed in time through the red and green lamp beads which are turned on and off, and the display of the components is controlled through a modular structure.

Specifically, when playing synchronously: external HDMI data is converted into MIPI, and display signals are input into a CPU for processing and then are sent to an FPGA; and when the HDMI is converted into the MIPI, the audio data of the IIS is separated, and the audio data is accessed into a channel B of the TS3A5018 PWR. When playing asynchronously: video or other programs stored in the ROM are played through the CPU, image data are sent to the rear end FPGA, and audio data are accessed to the channel A of the TS3A5018PWR through the IIS.

The embodiment of the utility model discloses LED screen is with asynchronous broadcast auto-change over device, include: a synchronization input for inputting an external first video stream; an asynchronous input for inputting an internal second video stream; and the control module is connected with the synchronous input end and the asynchronous input end and is used for generating a switching signal according to the first video stream or the second video stream and playing videos and audios after processing the first video stream or the second video stream. The utility model provides a pair of LED screen has realized automatic switch-over with asynchronous broadcast interface through built-in chip with asynchronous broadcast auto-change over device, has solved among the prior art and has realized the problem that needs to change the interface when switching over with asynchronous broadcast, has realized full automatic switch-over broadcast, has promoted user's experience.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. The utility model provides a LED screen is with asynchronous broadcast auto-change over device which characterized in that includes:

a synchronization input for inputting an external first video stream;

an asynchronous input for inputting an internal second video stream;

2. The LED panel synchronous-asynchronous broadcasting switching device according to claim 1, wherein said synchronous input terminal is connected to an external device for transmitting a first video stream inputted from said external device.

3. The device for switching between LED screen synchronous and asynchronous playing according to claim 1, wherein the synchronous input terminal is an HDMI interface.

4. The LED panel synchronous-asynchronous play switching device of claim 1, wherein said asynchronous input is ROM memory.

5. The device for switching between synchronous and asynchronous playing of the LED screens according to claim 1, wherein the control module comprises a CPU processor, a control chip and an FPGA, the CPU processor is used for processing the first video stream or the second video stream to generate a video signal, transmitting the video signal to the FPGA for processing and generating the switching signal, and the control chip is used for controlling the first video stream or the second video stream to output an audio signal according to the switching signal.

6. The LED panel synchronous and asynchronous playing switching device according to claim 5, wherein the switching signal is an I/O control signal, and the I/O control signal is used for controlling the input condition of the control chip.

7. The LED screen synchronous and asynchronous play switching device of claim 6, wherein when the input is a first video stream, access is performed through a first channel of the control chip; and when the input is a second video stream, accessing through a second channel of the control chip.

8. The LED screen synchronous and asynchronous play switching device according to claim 7, wherein when the input is a first video stream, first audio data separated from the first video stream is processed after passing through a first channel of the control chip; and when the input is a second video stream, processing second audio data separated from the second video stream after passing through a second channel of the control chip.

9. The LED panel synchronous/asynchronous play switching device of claim 8, further comprising an audio player for playing the first audio data or the second audio data.

10. The LED screen synchronous and asynchronous play switching device as recited in claim 7, further comprising a display screen for displaying first video data of the first video stream separation or displaying second video data of the second video stream separation.