CN113438524A - Single-screen multi-picture sharing system - Google Patents
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- CN113438524A CN113438524A CN202010191507.5A CN202010191507A CN113438524A CN 113438524 A CN113438524 A CN 113438524A CN 202010191507 A CN202010191507 A CN 202010191507A CN 113438524 A CN113438524 A CN 113438524A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
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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]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43637—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
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- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
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Abstract
The application provides a single-screen multi-picture sharing system, includes: the N external video playing units are used for respectively providing different independent video signals; the signal processing unit is used for acquiring each independent video signal and synthesizing the independent video signals into a shared video signal based on a preset frequency; the LED screen controller is used for receiving the shared video signal and converting the shared video signal into a corresponding electric signal; the LED display screen is used for receiving the electric signals and displaying corresponding video pictures; the signal emitter is used for respectively emitting switching frequency signals adapted for watching video pictures corresponding to different independent video signals to the outside according to the preset frequency of the shared video signal; the N liquid crystal glasses are used for respectively receiving switching frequency signals corresponding to an independent video signal and synchronously carrying out shielding and light transmission switching according to the switching frequency signals so as to watch a video picture corresponding to the independent video signal. The application can meet the requirement of simultaneously watching a plurality of pictures on one display device.
Description
Technical Field
The application relates to the technical field of display control, in particular to a single-screen multi-picture sharing system.
Background
The LED display screen gradually replaces the traditional spliced screen and projection by virtue of the advantages of high brightness, seamless splicing and the like, and is applied to various industries. The display modes of the LED display screen are also various according to different use scenes. In addition to meeting the conventional display requirements, some special visual demonstration is sometimes required. For example the following scenarios: at home on weekends, father and son want to watch television, son want to watch cartoon, father want to watch football match, but only have one television, and all want to watch with bigger television, and do not want to watch with small-sized mobile phone or computer equipment, at this moment, one party must give a back.
The equipment such as computer and cell-phone can satisfy the individual and watch the video in a flexible way, but just it is inconvenient to the demand that many people watched simultaneously to along with the improvement of people's physical life, people prefer to watch on large-scale terminal display device, but general family mostly disposes a TV, and when the different videos that need watch appear, prior art or equipment just can't satisfy.
If there is a way to realize watching two kinds of programs on one large terminal display device such as TV set without affecting the display effect, it can solve the problem. The application of the method and the device can solve the problem that a plurality of pictures are watched on one display device simultaneously, and the plurality of pictures are not interfered with each other.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present application is to provide a single-screen multi-picture sharing system for solving at least one problem in the prior art.
To achieve the above and other related objects, there is provided a single-screen multi-screen sharing system, the system including: n external video playing units for respectively providing different independent video signals; the signal processing unit is in communication connection with each external video playing unit and is used for acquiring each independent video signal provided by each external video playing unit and synthesizing each independent video signal into a shared video signal based on a preset frequency; the LED screen controller is in communication connection with the signal processing unit and is used for receiving the shared video signal and converting the shared video signal into a corresponding electric signal; the LED display screen is in communication connection with the screen controller and is used for receiving the electric signal and displaying a corresponding video picture; the signal emitter is in communication connection with the screen controller and is used for respectively emitting switching frequency signals which are adapted to watch video pictures corresponding to different independent video signals to the outside according to the preset frequency of the shared video signal; and the N liquid crystal glasses are respectively in communication connection with the signal emitter and are used for respectively receiving the switching frequency signal corresponding to the independent video signal and synchronously carrying out shielding and light transmission switching according to the switching frequency signal so as to watch a video picture corresponding to the independent video signal.
In an embodiment of the application, each external video playing unit bluetooth communication module and each liquid crystal glasses are further provided with a bluetooth headset, and the external video playing unit is in one-to-one communication connection with the liquid crystal glasses to transmit an audio signal synchronized with an independent video signal provided by the external video playing unit.
In an embodiment of the present application, the external video playing unit is: any one or more of a television, a smart phone, a laptop, a desktop, a tablet, an MP4, and a projector.
In an embodiment of the present application, the signal processing unit is a video splicer.
In an embodiment of the application, the signal processing unit sequentially and alternately inserts each frame of each of the independent video signals according to a preset frequency to superimpose and synthesize the independent video signals into the shared video signal.
In an embodiment of the application, the video frames are video frames corresponding to each of the external video playing units and are continuously and alternately displayed according to the preset frequency.
In an embodiment of the present application, the liquid crystal glasses are composed of two black-and-white liquid crystal lenses and a glasses frame; the black and white lens can switch between shielding and light transmission at a certain frequency when in work; wherein, the white lens is transparent for the sight of human eyes; the black lens is opaque for blocking the vision of human eyes.
In an embodiment of the present application, the two black and white liquid crystal lenses of the liquid crystal glasses are simultaneously switched to a white lens or a black lens according to a certain frequency.
In an embodiment of the present application, when the preset frequency is F, the refresh frequency of the refresh frequency signal is F/N, where N is greater than or equal to 2; the difference between the switching frequency signals corresponding to the independent video signals is 1/F second.
As described above, a single-screen multi-screen sharing system of the present application includes: n external video playing units for respectively providing different independent video signals; the signal processing unit is in communication connection with each external video playing unit and is used for acquiring each independent video signal provided by each external video playing unit and synthesizing each independent video signal into a shared video signal based on a preset frequency; the LED screen controller is in communication connection with the signal processing unit and is used for receiving the shared video signal and converting the shared video signal into a corresponding electric signal; the LED display screen is in communication connection with the screen controller and is used for receiving the electric signal and displaying a corresponding video picture; the signal emitter is in communication connection with the screen controller and is used for respectively emitting switching frequency signals which are adapted to watch video pictures corresponding to different independent video signals to the outside according to the preset frequency of the shared video signal; and the N liquid crystal glasses are respectively in communication connection with the signal emitter and are used for respectively receiving the switching frequency signal corresponding to the independent video signal and synchronously carrying out shielding and light transmission switching according to the switching frequency signal so as to watch a video picture corresponding to the independent video signal.
The single-screen multi-picture sharing system can meet the requirement of simultaneously watching a plurality of pictures on one display device.
Drawings
Fig. 1 is a schematic structural diagram of a single-screen multi-screen sharing system in an embodiment of the present application.
Fig. 2 is a schematic diagram illustrating a principle that a pair of liquid crystal glasses in the embodiment of the present application presents a single-screen multi-picture.
Detailed Description
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present application, and although the drawings only show the components related to the present application and are not drawn according to the number, shape and size of the components in actual implementation, the type, amount and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
As shown in fig. 1, a schematic structural diagram of a single-screen multi-screen sharing system in the embodiment of the present application is shown. As shown, the single-screen multi-screen sharing system 100 includes: n external video playing units 110, a signal processing unit 120, an LED screen controller 130, an LED display screen 140, a signal transmitter 150, and N liquid crystal glasses 160.
The LED display screen 140 with the high refresh rate is mainly utilized, and the function that one display screen can display different pictures is realized by matching with the switching frequency of the liquid crystal glasses 160.
Briefly, the system 100 firstly transmits a plurality of external video signals to a signal processing device through a video cable or a data line, the signal processing device superimposes external video signal sources from different players into one video signal source, the video processing device transmits the superimposed signal to the LED screen controller 130 through the video cable, and the LED screen controller 130 converts the video signal into an electrical signal and transmits the electrical signal to the LED display screen 140 for display through the network line. The signal transmitter 150 is connected to the LED screen controller 130 through a signal line and transmits a switching frequency signal to the outside, and the liquid crystal glasses 160 receives the switching frequency signal from the signal transmitter 150 and changes the switching frequency of the liquid crystal glasses 160 according to the signal to achieve the purpose of seeing different images at different switching frequencies.
N external video playback units 110For respectively providing different independent video signals.
In an embodiment of the present application, the external video playing unit 110 is: any one or more of a television, a smart phone, a laptop, a desktop, a tablet, an MP4, and a projector. And the video source provided by the external video playing unit 110 may be from a network video, a cable tv source, an external device projection, an optical disc, a usb disk, etc., and may support a downloaded video, and may also support an online live video,
in the present application, corresponding to video data, solutions are also provided for corresponding audio data. The method specifically comprises the following steps: each external video playing unit 110 is provided with a bluetooth communication module, and each liquid crystal glasses 160 is further provided with a bluetooth earphone, and the bluetooth earphones are in one-to-one communication connection with the liquid crystal glasses 160 through the external video playing unit 110 so as to transmit an audio signal synchronized with the independent video signal provided by the external video playing unit 110.
The present application may utilize existing one-to-many bluetooth communication technology. One bluetooth module can be connected with a plurality of bluetooth devices simultaneously, and generally, one bluetooth module can support 7 devices simultaneously. Bluetooth is divided into a master device and a slave device. A bluetooth master device can communicate with up to 7 devices in a bluetooth network. In the system 100 of the present application, the liquid crystal glasses 160 used by the user to receive the audio signal are regarded as the master device, and the external video playback unit 110 is regarded as the slave device. Data transfer may occur between a master device and a slave device, and the master device may select the slave device to access. Thus, during use of the system 100, multiple audio frequencies can be separated and selected by switching channels of the bluetooth device worn by the user to communicate with different signal source devices.
For example, when an external video playing unit 110 is a mobile phone, the bluetooth communication of the mobile phone is turned on, and then the bluetooth headset of the lcd glasses 160 is connected to the bluetooth of the mobile phone, so that audio data is not provided when the mobile phone inputs video like the system 100. In addition, in the present application, since the time for video processing and output to the LED display panel 140 for display is short, the audio data and the video screen of the LED display panel 140 are almost synchronized.
Signal processing unit 120And is communicatively connected to each of the external video playing units 110, and configured to acquire each of the independent video signals provided by each of the external video playing units 110, and synthesize each of the independent video signals into a shared video signal based on a preset frequency.
Preferably, the signal processing unit 120 is a video splicer. The video splicer is a high-tech device which divides a complete image signal into N blocks and distributes the N blocks to N video display units. It uses several ordinary video units to form a dynamic image display screen with super large screen, and can support the simultaneous connection of several video equipments. The video splicer can also realize that a plurality of physical outputs are combined into ultrahigh resolution display output after resolution superposition, so that the screen wall forms a logic display screen with ultrahigh resolution, ultrahigh brightness and oversized display size, and the display functions of various modes such as windowing, moving and zooming of a plurality of signal sources on the screen wall are completed. The video splicer is widely applied to large-screen display equipment such as television markets, government offices, electric power and water conservancy, telecommunications, public security, military forces, railways, transportation, mining industry, energy sources, steel, display centers of enterprises and the like, monitoring centers, dispatching centers, command centers, conference rooms, large-screen display systems 100 of display halls, plasma, liquid crystal televisions and the like.
Specifically, in the process of synthesizing the independent video signals into the shared video signal based on the preset frequency by the signal processing unit 120, each frame of the independent video signals is sequentially and alternately inserted according to the preset frequency so as to be superimposed and synthesized into the shared video signal.
It should be noted that the above-mentioned scheme is implemented based on a technology of at least 60Hz preset frequency, and when there are two external video playing units 110, the switching frequencies of two liquid crystal glasses for watching video are 30Hz respectively. When the preset frequency reaches 120Hz and 240Hz, the simultaneous display of 4 and 8 different pictures can be realized by adjusting the preset frequency of the liquid crystal glasses 160.
LED screen controller 130And is communicatively connected to the signal processing unit 120, and configured to receive the shared video signal and convert the shared video signal into a corresponding electrical signal, so that the LED display screen 140 (such as a television or other large display device) is adapted to receive and perform corresponding display.
LED display screen 140And the screen controller is in communication connection with the screen controller and is used for receiving the electric signal and displaying a corresponding video picture.
In an embodiment of the present invention, the video frames are video frames corresponding to each of the external video playing units 110 and are continuously and alternately displayed according to the predetermined frequency. In short, the frames displayed on the LED display screen 140 are the video frames of two video frames that are continuously and alternately displayed, and the frames directly viewed by human eyes are seventy-eight-vinths. In some special scenarios, the system 100 of the present application may also be applied to situations where privacy is required.
Signal transmitter 150And the switching frequency signal is in communication connection with the screen controller and is used for respectively transmitting switching frequency signals which are adapted to watch video pictures corresponding to different independent video signals to the outside according to the preset frequency of the shared video signal.
In an embodiment of the present application, a difference between the switching frequency signals corresponding to the independent video signals is 1/F second. For example, when there are two external video playback units 110, it is normally necessary to transmit two switching frequency signals (the frequencies of which are the same), but a time difference needs to be set between the two switching frequency signals, thereby realizing viewing of pictures of different videos.
N pieces of liquid crystal glasses 160And are respectively in communication connection with the signal transmitter 150, and configured to receive the switching frequency signal corresponding to one of the independent video signals, and synchronously perform shielding and transparent switching according to the switching frequency signal, so as to view a video image corresponding to the independent video signal.
In an embodiment of the present application, when the preset frequency is F, the refresh frequency of the refresh frequency signal is F/N. It should be noted that the above-mentioned scheme is implemented based on a technology of at least 60Hz preset frequency, and when there are two external video playing units 110, the switching frequencies of two liquid crystal glasses for watching video are 30Hz respectively. When the preset frequency reaches 120Hz and 240Hz, the simultaneous display of 4 and 8 different pictures can be realized by adjusting the preset frequency of the liquid crystal glasses 160.
It should be noted that the imaging principle of the active 3D technique is utilized and improved in the present application. The active 3D shutter technology realizes a 3D display effect according to the refresh time of human eyes to the image frequency. The principle of 3D imaging is that two cameras are used to simulate human eyes to observe objects, two pictures with slightly different viewing angles are shot, and the pictures are output to two eyes of a person respectively during playing, so that 3D shooting is not difficult, there is no technical difference, and it is difficult to make only two eyes of a person respectively view a specified picture. The active shutter type 3D technology is also called as a time division shading technology or a liquid crystal time division technology and is mainly realized by liquid crystal glasses. The glasses lens are essentially two liquid crystal screens which can be controlled to be turned on/off respectively, the liquid crystal layer in the eyes has two states of black and white, and the liquid crystal layer is normally displayed in a white state, namely a transparent state, and becomes black after being electrified. Through a signal transmitting device, the 3D eyes and the screen can be accurately synchronized.
For example, the principle of realizing a 3D viewing effect by liquid crystal glasses is as follows: the left and right eye pictures can be played alternately on the display screen, when the left picture is played, the left glasses are opened, the right glasses are closed, the left eye of a viewer sees the picture which needs to be seen by the left eye, and the right eye of the viewer cannot see anything. When the right-eye picture is played, the right eye sees the right picture, and the left eye cannot see the picture, so that the left eye and the right eye respectively see the respective left picture and the respective right picture, and the 3D effect is realized. This process alternates at least up to 120 times per second, and the human eye can enjoy a coherent, non-flickering 3D picture.
However, it should be noted that the principle of the present application is to present a multi-screen fusion screen instead of a 3D screen on a display screen, and there is a significant difference in technical solution and technical effect from the 3D screen on the display screen. In the present application, the liquid crystal glasses 160 are composed of two black and white liquid crystal lenses and a glasses frame, and the black and white lenses can perform the switching between shielding and transmitting at a certain frequency during operation; wherein, the white lens is transparent for the sight of human eyes; the black lens is opaque for blocking the vision of human eyes. While the display device fitted with the glasses alternately displays images at the same frequency as the glasses, the pictures switched at high speed leave the pictures that the liquid crystal glasses 160 want you to see in the brain. Because the pictures of the eyes of the person have certain intervals on the display equipment, the residual pictures are processed and overlapped again by the brain, and the original video picture is formed.
For ease of understanding, reference may be made to the schematic diagram shown in FIG. 2. As shown in the figure, the first column indicates that when the LED display screen 140 displays one frame of the video a corresponding to one external video playing unit 110, the liquid crystal glasses a are transparent, and the liquid crystal glasses a are shielded. The second column indicates that when the LED display screen 140 displays a frame of the video B corresponding to another external video playing unit 110, the liquid crystal glasses B are shielded at this time, and the liquid crystal glasses B are transparent at this time.
In the present application, the two black and white liquid crystal lenses of the liquid crystal glasses 160 are simultaneously switched to a white lens or a black lens at a predetermined frequency. This is in contrast to the alternating black and white switching of the left and right lenses required to achieve a 3D picture on the display screen.
To sum up, the present application provides a single-screen multi-picture sharing system, including: n external video playing units for respectively providing different independent video signals; the signal processing unit is in communication connection with each external video playing unit and is used for acquiring each independent video signal provided by each external video playing unit and synthesizing each independent video signal into a shared video signal based on a preset frequency; the LED screen controller is in communication connection with the signal processing unit and is used for receiving the shared video signal and converting the shared video signal into a corresponding electric signal; the LED display screen is in communication connection with the screen controller and is used for receiving the electric signal and displaying a corresponding video picture; the signal emitter is in communication connection with the screen controller and is used for respectively emitting switching frequency signals which are adapted to watch video pictures corresponding to different independent video signals to the outside according to the preset frequency of the shared video signal; the N liquid crystal glasses 160 are respectively in communication connection with the signal transmitter, and are configured to respectively receive the switching frequency signal corresponding to one of the independent video signals, and synchronously perform shielding and transparent switching according to the switching frequency signal, so as to view a video image corresponding to the independent video signal.
The application effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and utilities of the present application and are not intended to limit the application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.
Claims (9)
1. A single-screen multi-view sharing system, the system comprising:
n external video playing units for respectively providing different independent video signals;
the signal processing unit is in communication connection with each external video playing unit and is used for acquiring each independent video signal provided by each external video playing unit and synthesizing each independent video signal into a shared video signal based on a preset frequency;
the LED screen controller is in communication connection with the signal processing unit and is used for receiving the shared video signal and converting the shared video signal into a corresponding electric signal;
the LED display screen is in communication connection with the screen controller and is used for receiving the electric signal and displaying a corresponding video picture;
the signal emitter is in communication connection with the screen controller and is used for respectively emitting switching frequency signals which are adapted to watch video pictures corresponding to different independent video signals to the outside according to the preset frequency of the shared video signal;
and the N liquid crystal glasses are respectively in communication connection with the signal emitter and are used for respectively receiving the switching frequency signal corresponding to the independent video signal and synchronously carrying out shielding and light transmission switching according to the switching frequency signal so as to watch a video picture corresponding to the independent video signal.
2. The system according to claim 1, wherein each of the external video playing units comprises a bluetooth communication module, each of the liquid crystal glasses further comprises a bluetooth earphone, and the bluetooth earphones are in one-to-one communication connection with the liquid crystal glasses through the external video playing units to transmit audio signals synchronized with independent video signals provided by the external video playing units.
3. The system of claim 2, wherein the external video playback unit is: any one or more of a television, a smart phone, a laptop, a desktop, a tablet, an MP4, and a projector.
4. The system of claim 1, wherein the signal processing unit is a video splicer.
5. The system according to claim 4, wherein the signal processing unit alternately inserts each frame of the independent video signals in sequence at a preset frequency to be superimposed and combined into the shared video signal.
6. The system according to claim 1, wherein the video frames are displayed alternately and continuously according to the predetermined frequency, and the video frames correspond to the external video playing units.
7. The system of claim 1, wherein the liquid crystal glasses are comprised of two black and white liquid crystal lenses and a frame; the black and white lens can switch between shielding and light transmission at a certain frequency when in work; wherein, the white lens is transparent for the sight of human eyes; the black lens is opaque for blocking the vision of human eyes.
8. The system of claim 7, wherein the two black and white liquid crystal lenses of the liquid crystal glasses are switched to a white lens or a black lens simultaneously according to a certain frequency.
9. The system of claim 1, wherein when the preset frequency is F, the refresh frequency of the refresh frequency signal is F/N, where N is greater than or equal to 2; the difference between the switching frequency signals corresponding to the independent video signals is 1/F second.
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