CN106161870A - A kind of multi-screen controls equipment and the system of synchronization - Google Patents
A kind of multi-screen controls equipment and the system of synchronization Download PDFInfo
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Abstract
The invention discloses a kind of multi-screen and control equipment and synchronization system, in the sub-screen at display curtain wall, show same video source across screen.Described multi-screen controls equipment and includes: clock produces and control unit, and it provides homology clock signal as the clock signal of locally displayed output unit；Frame synchronization control unit, it is according to the frame synchronizing signal of the system synchronization signal locally displayed output unit of generation, and wherein, described system synchronization signal is that the feedback signal according to frame synchronization handshake generates；Thus the view data of every two field picture partitioning portion is provided to the sub-screen of display curtain wall by locally displayed output unit according to described frame synchronizing signal and clock signal.The present invention uses the low cost multi-screen of small-scale to control equipment, uses identical reference clock and frame synchronization display signal, it is ensured that Pixel-level simultaneous display on different sub-screens between distinct device.
Description
Technical field
The present invention relates to image display technology field, specifically, relate to a kind of multi-screen and control equipment and synchronize system
System.
Background technology
Prior art uses many screen controllers multiple video display units are formed a jumbotron, generally use
Image control in the large-scale tiled display curtain wall of control centre.
Current many screen controllers, to support bigger display scale, typically have two schemes.A kind of method is
Single chassis uses and supports larger-scale video channel exchange chip (Vedio Switch), but owing to handing over
Changing chip and cannot accomplish infinitely-great scale, multipotency supports limited display screen.And video channel is handed over
Changing chip-scale increase can cause cost to be multiplied, and makes large-scale single chassis integrated cost the highest.
Another kind of method is to transmit synchronous control command by agreements such as networks between the many screen controllers of multiple monomer to realize
Display synchronizes, and this is referred to as dcs.
Application No. 200880010219.2, the application documents of Publication No. CN101647273A disclose
Use the multi-screen sync reproduction system that distributed controll realizes, but this scheme exists network transfer delay, with
Step signal arrive distinct device time postpone a meeting or conference between difference, and different network environments that synchronicity difference can be very
Greatly.Because the read clock frequency difference of different monomers controller and central processing unit are to showing the processing speed of image not
With, it usually needs synchronous calibration is re-started through after a period of time.
Application No. 200910042304.3, the application documents of Publication No. CN101763840A disclose
A kind of synchronous display apparatus system and control method thereof.This scheme needs the most external clock and frame synchronization control
Unit processed, adds use complexity.And owing to external unit is because of hardware limitation, can only support limited
Equipment synchronizes, it is impossible to accomplish larger-scale.The HS signal that frame synchronizing signal is VGA used in the program,
So it is limited to only support the synchronization that VGA form exports, and the letters such as DVI, HDMI and SDI can not be supported
Number display synchronize.
Therefore, a kind of technical side being capable of large-scale low cost multi-screen control equipment simultaneous display is needed badly
Case.
Summary of the invention
The invention aims to overcome in prior art multi-screen to control device structure is complicated and synchronous effect relatively
The technological deficiency of difference.
In order to solve above-mentioned technical problem, first embodiments herein provides a kind of multi-screen to control equipment, is used for
Same video source is shown across screen in the sub-screen of display curtain wall, including:
Clock produces and control unit, and it provides homology clock signal as the clock letter of locally displayed output unit
Number；
Frame synchronization control unit, it generates the frame synchronization letter of locally displayed output unit according to system synchronization signal
Number, wherein, described system synchronization signal is that the feedback signal according to frame synchronization handshake generates；
Thus according to described frame synchronizing signal and clock signal by locally displayed output unit to the son of display curtain wall
Screen provides the view data of every two field picture partitioning portion.
In one embodiment, described frame synchronization control unit includes:
Handshake processing module, it generates and sends frame synchronization handshake under major state；
System synchronization processing module, it receives the feedback signal of described frame synchronization handshake under major state,
Produce and send described system synchronization signal.
In one embodiment, under control state,
Described handshake processing module generates feedback signal for the frame synchronization handshake received；
Described system synchronization processing module receives described system synchronization signal.
In one embodiment, under control state, described system synchronization is believed by described system synchronization processing module
Number forward.
In one embodiment, described clock produces and control unit includes:
Clock generation module, is used for producing local crystal oscillator clock signal；
Control module, is used for controlling phase-locked loop operation at overtone mode or bypass mode；
Wherein, under major state, phase-locked loop operation is at overtone mode, and local crystal oscillator clock signal is through phaselocked loop
Described homology clock signal is generated after frequency multiplication；
Under control state, clock signal, at bypass mode, is followed as this in the outside of reception by phase-locked loop operation
The clock signal of ground display output unit.
In one embodiment, described clock produces and control unit farther includes clock distribution block, is used for
By the distribution of described homology clock signal to locally displayed output unit under major state, and by described homology clock
Signal exports using as following clock signal.
In one embodiment, described clock signal of following is being turned under control state by described clock distribution block
Send out.
In one embodiment, also include:
Transmitting element, is used for sending described homology clock signal, frame synchronization handshake, feedback signal and system
Synchronizing signal；
Receive unit, be used for receiving described homology clock signal, frame synchronization handshake, feedback signal and system
Synchronizing signal；
Wherein, described transmitting element and reception unit include RJ-45 interface module, and described homology clock signal is led to
Cross first and twisted-pair feeder is carried out differential transfer, described frame synchronization handshake or feedback signal by second to double
Twisted wire carries out differential transfer, and described system synchronization signal carries out differential transfer by the 3rd pair of twisted-pair feeder.
Embodiments herein also provides for a kind of multi-screen and controls the synchronization system of equipment, for the son at display curtain wall
Showing same video source across screen in screen, including a main equipment with at least one from equipment, wherein said master sets
Standby is that the multi-screen being operated in major state controls equipment, and described is to be operated in the multi-screen from control state to control from equipment
Equipment, described multi-screen controls equipment as according to any one of claim 1 to 8.
In one embodiment, main equipment output homology clock signal, as following clock signal, receives from equipment
Described follow the clock signal clock signal as locally displayed output unit；
Main equipment output frame synchronizes handshake, from equipment, described frame synchronization handshake is generated feedback signal；
Main equipment, based on all generating system synchronization signal from the feedback signal of equipment, receives described system from equipment
Synchronizing signal is as the frame synchronizing signal of locally displayed output unit.
In one embodiment, intergrade from equipment receive higher level's clock signal of following from device forwards, and to
Next stage is from device forwards；
Intergrade receives, from equipment, the frame synchronization handshake that main equipment generates, or receives higher level from equipment generation
The higher level's feedback signal for frame synchronization handshake, generate this grade this grade of feedback signal from equipment, incite somebody to action this
Level feedback signal sends to next stage from equipment；
Main equipment produces system synchronization signal based on final stage from the feedback signal of equipment, and intergrade is from equipment receives
The system synchronization signal of level device forwards, and to next stage from device forwards.
In one embodiment, described main equipment connects from equipment composition star topology respectively, wherein,
Homology clock signal is exported to each from equipment by main equipment respectively；
Main equipment is receiving all generation system synchronization signal after the feedback signal of equipment.
Compared with prior art, embodiments herein uses the low cost multi-screen of small-scale to control equipment, no
With using identical reference clock and frame synchronization display signal between equipment, it is ensured that on different sub-screens, Pixel-level is same
Step display.The present invention can support that the video signal of the different-formats such as VGA, DVI, HDMI and SDI synchronizes
Display.
Embodiments of the invention without increasing the most external clock and frame synchronization control unit, main equipment and from setting
For the synchronization system connecting and composing multiple topological form can be cascaded, support any number of equipment cascading.Use logical
5 class lines and RJ-45 interface module realize cascade and connect, cost performance is high, highly versatile, facilitates the engineering should
With.Cascade between equipment uses differential transfer synchronised clock and signal, and capacity of resisting disturbance is strong.
Accompanying drawing explanation
Accompanying drawing is for providing a further understanding of the present invention, and constitutes a part for description, with the present invention
Embodiment be provided commonly for explain the present invention, be not intended that limitation of the present invention.In the accompanying drawings:
Fig. 1 is the principle schematic diagram across screen display of the mono signal source according to embodiments of the present invention；
Fig. 2 is the structure chart of the built-in sync control device of many screen controllers according to embodiments of the present invention；
Fig. 3 is that clock according to embodiments of the present invention produces and the structure chart of control module；
Fig. 4 is the structure chart of frame synchronization control module according to embodiments of the present invention；
Fig. 5 is the connection mode schematic diagram of transmission according to embodiments of the present invention or receiving interface module；
Fig. 6 is the synchronization system annular cascade schematic diagram that multi-screen according to embodiments of the present invention controls equipment；
Fig. 7 is the synchronization system Y-connection schematic diagram that multi-screen according to embodiments of the present invention controls equipment；
Fig. 8 is the principle schematic diagram of synchronizing signal trend in synchronization system according to embodiments of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing the present invention made into
One step ground describes in detail.
First the application scenarios of the embodiment of the present invention is illustrated.Due between many motors control equipment signal source without
Method is transmitted by the High speed rear panel lane video channel on similar specific installation, and the present embodiment utilizes video to divide
One tunnel video source is decomposed into the same source video signal of multichannel by road device.In the example of fig. 1, display curtain wall is respectively
It is by the big curtain wall of a 8X5 of the three of 3X5,4X5 and 1X5 sub-screen splicings, a frame video figure
As controlling to complete across screen display after equipment processes by 3 multi-screens respectively.As it is shown in figure 1, video branch apparatus
Different output ports be connected to multi-screen control equipment input port, multi-screen control equipment every two field picture is split
After, export tiled display district by delivery outlet, thus realize video image across screen tiled display.
In order to be guaranteed in three sub-screens the synchronicity of display, the present embodiment different multi-screen control equipment it
Between identical reference clock and frame synchronizing signal are provided so that multi-screen control equipment read clock synchronize, and
Ensure that the output of same two field picture in different multi-screen control equipment synchronizes.
Specifically, the multi-screen control equipment of the embodiment of the present invention includes built-in sync control device and this locality shows
Showing output unit, wherein, built-in sync control device provides synchronizing signal for locally displayed output unit.Reference
Shown in Fig. 2, built-in sync control device includes that clock produces and control unit, frame synchronization control unit.Wherein,
Clock produce and control unit for provide homology clock signal as the clock signal of locally displayed output unit,
Frame synchronization control unit is used for generating the frame synchronizing signal of locally displayed output unit according to system synchronization signal, from
And carry to the sub-screen of display curtain wall by locally displayed output unit according to described frame synchronizing signal and clock signal
View data for every two field picture partitioning portion.
In following example, in Fig. 1, multi-screen controls equipment 1 is main equipment, and multi-screen controls equipment 2 and 3 and is
From equipment.In order to ensure that multi-screen controls the read clock stringent synchronization of equipment, the clock signal that main equipment is produced
As homology clock signal, all follow this homology clock signal from equipment.Additionally, in order to ensure each frame video
Image starts simultaneously at display when segmentation display, and the present embodiment uses frame synchronization handshake and system synchronization signal
Realize frame synchronization.Specifically, main equipment receives all from the equipment feedback signal to frame synchronization handshake
After, generate system synchronization signal and send to from equipment.Start when equipment receives this system synchronization signal by this
Display output unit in ground is to the image information of display sub-screen output segmentation.Since so, same two field picture is not
With starting simultaneously at display on sub-screen, and each segmentation image block can export simultaneously.
Referring to Fig. 3, the function of clock generation and control unit is described in detail.Clock produces and controls
Unit includes clock generation module, phase-locked loop pll, control module and clock distribution block.Clock generation module
For generating reference clock ref_clk.Phase-locked loop pll can carry out process of frequency multiplication to reference clock.In control module
Effect under, PLL be operated in overtone mode or bypass (BYPASS) pattern.Clock distribution block will be with
Source clock signal distribution is to locally displayed output unit, or to provide, the output of homology clock signal is followed clock
Signal.
In a preferred mode, clock generation module is a crystal oscillator, when being used for producing local crystal oscillator
Clock signal is as reference clock ref_clk.Under major state, PLL is operated in overtone mode, according to actual need
Reference clock ref_clk carried out process of frequency multiplication and to produce 65M～the 162M homology clock signal such as not, pass through
Clock distribution block using homology clock signal as the clock signal of the locally displayed output unit of main equipment, and will be with
Clock signal output in source is using as following clock signal from equipment.Under control state, phase-locked loop operation is on side
Road pattern, follows the clock signal local synchronization signal as read clock, i.e. as from setting using the outside of reception
The clock signal of standby locally displayed output unit, and clock signal forwarding next stage will be followed.
Referring to Fig. 4, the function of frame synchronization control unit is illustrated.Frame synchronization control unit includes shaking hands
Signal processing module and system synchronization processing module.Under major state, handshake processing module generates concurrent
Send frame synchronization handshake, it is desirable to other equipment enters frame synchronization SBR.Receive frame synchronization from equipment to shake hands
Signal also combines local frame condition indicative signal generation feedback signal, represents and should the most carry out synchronization standard from equipment
Standby.The system synchronization processing module of main equipment generates system synchronization signal after receiving described feedback signal, as
The frame synchronizing signal of the locally displayed output unit of main equipment, and a step is by system synchronization signal output, makes from equipment
The frame synchronizing signal from the locally displayed output unit of equipment is generated according to this system synchronization signal.
In a preferred example, frame synchronization handshake, feedback signal and system synchronization signal are by height
Level signal represents.Under major state, it is (high that handshake processing module generates and sends frame synchronization handshake
Level " 1 "), it is desirable to enter frame synchronization SBR from equipment.
Generate local frame state from equipment according to the SBR of view data local display output unit to refer to
Show signal.As a example by frame rate is as 60Hz, the frame-scan period of display output unit is 0.017 second.At one
Preparing view data for display output unit in frame-scan period, local frame condition indicative signal is low level " 0 ".
Having completed the preparation of view data after complete frame-scan period, local frame condition indicative signal is high level
“1”。
Receive frame synchronization handshake (high level " 1 ") from equipment, carry out with local frame condition indicative signal
AND-operation generates the feedback signal to frame synchronization handshake.Specifically, if the instruction of local frame state is believed
Number be low level " 0 ", then the feedback signal produced is low level " 0 ", represent from equipment and be introduced into frame with
Step SBR.If local frame condition indicative signal is high level " 1 ", then the feedback signal produced is high electricity
Flat " 1 ", represents and enters frame synchronization SBR from equipment, can simultaneous display frame of video.
The system synchronization processing module of main equipment receives feedback signal " 0 " or " 1 " of frame synchronization handshake,
Generate system synchronization signal.In the case of feedback signal is low level " 0 ", system synchronization signal is low electricity
Flat " 0 ", represents that this system synchronization signal is unavailable.In the case of feedback signal is high level " 1 ", it is
System synchronizing signal is high level " 1 ", represents that this system synchronization signal can be used, can be raw according to system synchronization signal
Become the frame synchronizing signal of locally displayed output unit.
Turning again to Fig. 2, multi-screen controls equipment and also includes transmitting element and receive unit.Transmitting element is for sending out
Send described homology clock signal, frame synchronization handshake, feedback signal and system synchronization signal；Reception unit is used
In receiving described homology clock signal, frame synchronization handshake, feedback signal and system synchronization signal.From send,
The versatility of receiving interface and and site operation wire rod simplification, cost performance etc. from the standpoint of, transmitting element and connecing
Receive in unit and RJ-45 interface module, above-mentioned homology clock signal, frame synchronization handshake, feedback signal are set
Being respectively adopted paired twisted-pair wire with system synchronization signal utilizes difference LVDS signal to transmit.
As it is shown in figure 5, use three pairs of twisted-pair feeders in a RJ-45 interface module to transmit above-mentioned signal, its
In, homology clock signal carries out differential transfer, frame synchronization handshake or feedback letter by first pair of twisted-pair feeder
Number carrying out differential transfer by second pair of twisted-pair feeder, system synchronization signal carries out difference biography by the 3rd pair of twisted-pair feeder
Defeated.Measure and functional verification through reality, in the case of the highest synchronised clock 162MHz, through 10m CAT-5e
Cable transmission, the index such as wave-shape amplitude and shake fully meets LVDS level standard, and the transmission of 10m away from
From meeting site operation requirement completely.
Use above-mentioned interface scheme, main equipment and the synchronization system connecting and composing multiple topological form can be cascaded from equipment
System.Fig. 6 and Fig. 7 respectively illustrates annular networking and the network topology of star-like networking, is not limited to this, it is possible to adopt
System synchronization is realized with annular and star-like mixed networking.The present embodiment use 5 general class lines and RJ-45 connect
Mouth die block, cost performance is high, and highly versatile facilitates engineer applied.Cascade between equipment uses differential transfer same
Step clock and signal, capacity of resisting disturbance is strong.
In the multi-screen shown in Fig. 6 and Fig. 7 controls the synchronization system of equipment, main equipment output homology clock signal
As following clock signal, follow the clock signal clock as locally displayed output unit from described in equipment reception
Signal.Main equipment output frame synchronizes handshake, it is desirable to enter frame synchronization SBR from equipment.From equipment pair
Described frame synchronization handshake generates feedback signal, to notify that main equipment completes frame synchronization preparation.Main equipment
Based on all generating system synchronization signal from the feedback signal of equipment, receive described system synchronization signal from equipment and make
Frame synchronizing signal for locally displayed output unit.So need not the most external clock and frame synchronization controls single
Unit, only with low cost, small-scale multi-screen control equipment, utilize equipment cascading networking can by use phase
Same reference clock and frame synchronizing signal complete the simultaneous display of Pixel-level.
The operation principle that annular cascade and two kinds of topological form of star-like cascade synchronize system individually below is carried out
Explanation.
Show in the example of fig. 6 by a main equipment and two annular cascade networks formed from equipment.?
In Fig. 6, main equipment, cascade successively from equipment 1 with from equipment 2, i.e. suitable by receiving unit and transmitting element
Secondary cascade connects formation with ring topology.Main equipment generation homology clock transfer is given from equipment 1, will from equipment 1
This homology clock-forwarding, to from equipment 2, so all follows, from equipment 1 and 2, the homology clock that main equipment 1 produces.
As described above, the homology clock that main equipment produces can be 65M～162M according to video card requirements set, from setting
For being not required to this homology clock is carried out again process of frequency multiplication, can avoid prior art uses doubler from equipment
The frequency-splitting caused.Owing to no longer carrying out frequency multiplication operation from equipment, also will not produce after long-play
Raw frequency difference accumulation.
Main equipment produces frame synchronization handshake and is transferred to from equipment 1, raw from the frame synchronization control unit of equipment 1
The feedback signal of this frame synchronization handshake, is transferred to from equipment 2 in pairs.The feedback signal produced from equipment 1
Represent main equipment and the most completed the preparation of frame synchronization from equipment 1, and it is same to require to enter frame from equipment 2
Step SBR.Receive after the feedback signal that equipment 1 produces from equipment 2, generate feedback signal transmission
To main equipment.The feedback signal produced from equipment 2 represents from equipment 1 and the most all completes frame synchronization from equipment 2
Preparation.Since so, main equipment i.e. can determine whether from the feedback signal of equipment (from equipment 2) from final stage be
System all has been enter into frame synchronization preparation from equipment.As long as there is an equipment from equipment 1 and 2 to produce
Feedback signal be low level " 0 ", then final stage is " 0 " from the feedback signal of equipment (from equipment 2).
It is emphasized that in the present embodiment, design of feedback signal, to represent that equipment has completed frame synchronization and prepared, is kept away
Exempt from main equipment send system synchronization signal time owing to being not yet ready for picture number from the locally displayed output unit of equipment
According to the display mistake caused.Main equipment receives and produces system synchronization signal transmission after the feedback signal of equipment 2
To from equipment 1 with from equipment 2, so that armamentarium is all aobvious using this system synchronization signal as this locality in system
Show the frame synchronizing signal of output unit.As long as the feedback signal that final stage produces from equipment (from equipment 2) is low electricity
Flat " 0 ", then the system synchronization signal that main equipment produces is low level " 0 ", exists and be not fully complete in expression system
The equipment that frame synchronization prepares, this system synchronization signal is unavailable.
In the synchronization system of annular cascade, any number of equipment cascading can be supported.Intergrade connects from equipment
Receive higher level's clock signal of following from device forwards, and to next stage from device forwards.Intergrade receives from equipment
Main equipment generate frame synchronization handshake, or receive higher level from equipment generate for frame synchronization handshake
Higher level's feedback signal, generate this grade this grade of feedback signal from equipment, this grade of feedback signal sent to next
Level is from equipment.Main equipment is based only on final stage and i.e. can determine whether system the most equal from equipment from the feedback signal of equipment
Have been enter into frame synchronization SBR.Main equipment produces system synchronization signal, and intergrade receives higher level equipment from equipment
The system synchronization signal forwarded, and to next stage from device forwards so that in system, armamentarium is all with this system
Synchronizing signal is as frame synchronizing signal.
Fig. 8 is the principle schematic diagram of synchronizing signal trend.For frame figure each on distinct device in guarantee system
As synchronism output, i.e. ensure to ensure during the segmentation display of each two field picture segmentation block 1, segmentation block 2 ... image
Export simultaneously, difference is all delivered to main equipment to the feedback signal of frame synchronization handshake from equipment.Leading
Equipment judges that all producing system synchronization signal after equipment all completes frame synchronization preparation transmits to each
From equipment, start to shield to by locally displayed output unit to display after equipment receives this system synchronization signal
The data of curtain output partitioning portion image.
Additionally, the present embodiment uses single frame synchronization handshake and system synchronization signal same to complete frame
Step, such that it is able to support that the display of the signals such as VGA, DVI, HDMI and SDI synchronizes.
Show in the example in figure 7 by a main equipment and two star-like cascade networks formed from equipment.Main
Equipment connects respectively from equipment composition star topology, and homology clock signal is exported to each from setting by main equipment respectively
Standby.Main equipment is receiving all generation system synchronization signal after the feedback signal of equipment.The work of synchronizing signal
Make principle as shown in Figure 8.
Unlike annular cascade, in Fig. 7, main equipment receives each feedback signal from equipment respectively.Connecing
Receive all after the feedback signal of equipment, produce all carrying out AND-operation from the feedback signal of equipment
Raw system synchronization signal.So, as long as having one in Star Network is low level from the feedback signal of equipment
" 0 ", the system synchronization signal of generation is then low level " 0 ".Thus ensure all complete frame from equipment
Efficient system synchronizing signal just can be generated after synchronizing preparation.In the synchronization system of star-like cascade, from setting
For being not required to frame synchronization handshake and system synchronization signal are carried out relay forwarding, therefore want from the performance of equipment
Ask relatively low.
While it is disclosed that embodiment as above, but described content is only to facilitate understand the present invention
And the embodiment used, it is not limited to the present invention.Technology people in any the technical field of the invention
Member, on the premise of without departing from spirit and scope disclosed in this invention, can be in the formal and details implemented
On make any amendment and change, but the scope of patent protection of the present invention, still must be with appending claims institute
Define in the range of standard.
Claims (12)
1. multi-screen controls an equipment, shows same video source across screen in the sub-screen at display curtain wall,
It is characterized in that, including:
Clock produces and control unit, and it provides homology clock signal as the clock letter of locally displayed output unit
Number；
Frame synchronization control unit, it generates the frame synchronization letter of locally displayed output unit according to system synchronization signal
Number, wherein, described system synchronization signal is that the feedback signal according to frame synchronization handshake generates；
Thus according to described frame synchronizing signal and clock signal by locally displayed output unit to the son of display curtain wall
Screen provides the view data of every two field picture partitioning portion.
Multi-screen the most according to claim 1 controls equipment, it is characterised in that described frame synchronization controls single
Unit includes:
Handshake processing module, it generates and sends frame synchronization handshake under major state；
System synchronization processing module, it receives the feedback signal of described frame synchronization handshake under major state,
Produce and send described system synchronization signal.
Multi-screen the most according to claim 2 controls equipment, it is characterised in that under control state,
Described handshake processing module generates feedback signal for the frame synchronization handshake received；
Described system synchronization processing module receives described system synchronization signal.
Multi-screen the most according to claim 3 controls equipment, it is characterised in that under control state, institute
State system synchronization processing module to be forwarded by described system synchronization signal.
Multi-screen the most according to claim 1 controls equipment, it is characterised in that described clock produces and control
Unit processed includes:
Clock generation module, is used for producing local crystal oscillator clock signal；
Control module, is used for controlling phase-locked loop operation at overtone mode or bypass mode；
Wherein, under major state, phase-locked loop operation is at overtone mode, and local crystal oscillator clock signal is through phaselocked loop
Described homology clock signal is generated after frequency multiplication；
Under control state, clock signal, at bypass mode, is followed as this in the outside of reception by phase-locked loop operation
The clock signal of ground display output unit.
Multi-screen the most according to claim 5 controls equipment, it is characterised in that described clock produces and control
Unit processed farther includes clock distribution block, for described homology clock signal being distributed extremely under major state
Locally displayed output unit, and described homology clock signal is exported using as following clock signal.
Multi-screen the most according to claim 6 controls equipment, it is characterised in that described clock distribution block
Under control state, described clock signal of following is being forwarded.
Multi-screen the most according to claim 1 controls equipment, it is characterised in that also include:
Transmitting element, is used for sending described homology clock signal, frame synchronization handshake, feedback signal and system
Synchronizing signal；
Receive unit, be used for receiving described homology clock signal, frame synchronization handshake, feedback signal and system
Synchronizing signal；
Wherein, described transmitting element and reception unit include RJ-45 interface module, and described homology clock signal is led to
Cross first and twisted-pair feeder is carried out differential transfer, described frame synchronization handshake or feedback signal by second to double
Twisted wire carries out differential transfer, and described system synchronization signal carries out differential transfer by the 3rd pair of twisted-pair feeder.
9. a synchronization system for multi-screen control equipment, same across screen display in the sub-screen at display curtain wall
One video source, it is characterised in that include a main equipment and at least one is from equipment,
Wherein said main equipment be operated in major state multi-screen control equipment, described from equipment for be operated in from
The multi-screen of control state controls equipment, and described multi-screen controls equipment as according to any one of claim 1 to 8.
Multi-screen the most according to claim 9 controls the synchronization system of equipment, it is characterised in that
Main equipment output homology clock signal, as following clock signal, follows clock signal from described in equipment reception
Clock signal as locally displayed output unit；
Main equipment output frame synchronizes handshake, from equipment, described frame synchronization handshake is generated feedback signal；
Main equipment, based on all generating system synchronization signal from the feedback signal of equipment, receives described system from equipment
Synchronizing signal is as the frame synchronizing signal of locally displayed output unit.
11. multi-screens according to claim 10 control the synchronization system of equipment, it is characterised in that described
Main equipment and from equipment sequentially cascade connection formed with ring topology, wherein,
Intergrade receives higher level's clock signal of following from device forwards from equipment, and turns from equipment to next stage
Send out；
Intergrade receives, from equipment, the frame synchronization handshake that main equipment generates, or receives higher level from equipment generation
The higher level's feedback signal for frame synchronization handshake, generate this grade this grade of feedback signal from equipment, incite somebody to action this
Level feedback signal sends to next stage from equipment；
Main equipment produces system synchronization signal based on final stage from the feedback signal of equipment, and intergrade is from equipment receives
The system synchronization signal of level device forwards, and to next stage from device forwards.
12. multi-screens according to claim 10 control the synchronization system of equipment, it is characterised in that described
Main equipment connects from equipment composition star topology respectively, wherein,
Homology clock signal is exported to each from equipment by main equipment respectively；
Main equipment is receiving all generation system synchronization signal after the feedback signal of equipment.
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| CN201510170273.5A CN106161870B (en) | 2015-04-10 | 2015-04-10 | A kind of multi-screen control equipment and synchronization system |
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| CN201510170273.5A CN106161870B (en) | 2015-04-10 | 2015-04-10 | A kind of multi-screen control equipment and synchronization system |
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| CN108632499A (en) * | 2017-03-15 | 2018-10-09 | 深圳开阳电子股份有限公司 | A kind of image-signal processor and its sequential generation device |
| CN108766388A (en) * | 2018-08-28 | 2018-11-06 | 南京达斯琪数字科技有限公司 | display system, method and device |
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| CN108632499A (en) * | 2017-03-15 | 2018-10-09 | 深圳开阳电子股份有限公司 | A kind of image-signal processor and its sequential generation device |
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| CN111949068A (en) * | 2019-05-14 | 2020-11-17 | 福州瑞芯微电子股份有限公司 | Method and system for adjusting time sequence among multiple devices |
| CN110294171A (en) * | 2019-08-07 | 2019-10-01 | 深圳市血之缘医疗科技有限公司 | Multimachine cascades heat seal system |
| CN111291011A (en) * | 2020-02-19 | 2020-06-16 | 北京百度网讯科技有限公司 | File synchronization method and device, electronic equipment and readable storage medium |
| CN111291011B (en) * | 2020-02-19 | 2023-10-20 | 北京百度网讯科技有限公司 | File synchronization method and device, electronic equipment and readable storage medium |
| CN112687226A (en) * | 2020-12-30 | 2021-04-20 | 北京奕斯伟计算技术有限公司 | Driving method, driving device and display device |
| CN113205779A (en) * | 2021-03-31 | 2021-08-03 | 珠海全志科技股份有限公司 | Multi-screen synchronous control method, device and system suitable for electronic ink screen |
| CN113205779B (en) * | 2021-03-31 | 2022-06-10 | 珠海全志科技股份有限公司 | Multi-screen synchronous control method, device and system suitable for electronic ink screen |
| CN114697466A (en) * | 2022-03-17 | 2022-07-01 | 杭州海康威视数字技术股份有限公司 | Video frame acquisition synchronization control |
| CN114697466B (en) * | 2022-03-17 | 2023-10-13 | 杭州海康威视数字技术股份有限公司 | Video frame acquisition synchronization control |
| CN115426515A (en) * | 2022-08-03 | 2022-12-02 | 西安诺瓦星云科技股份有限公司 | Method, device, system and storage medium for multi-device synchronous calibration |
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