CN106161870B - A kind of multi-screen control equipment and synchronization system - Google Patents
A kind of multi-screen control equipment and synchronization system Download PDFInfo
- Publication number
- CN106161870B CN106161870B CN201510170273.5A CN201510170273A CN106161870B CN 106161870 B CN106161870 B CN 106161870B CN 201510170273 A CN201510170273 A CN 201510170273A CN 106161870 B CN106161870 B CN 106161870B
- Authority
- CN
- China
- Prior art keywords
- equipment
- signal
- screen
- synchronization
- clock signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Controls And Circuits For Display Device (AREA)
Abstract
The invention discloses a kind of multi-screen control equipment and synchronization systems, for showing same video source across screen in the sub-screen of display curtain wall.The multi-screen control equipment includes: clock generation and control unit, provides homologous clock signal as the clock signal that output unit is locally displayed；Frame synchronization control unit generates according to system synchronization signal and the frame synchronizing signal of output unit is locally displayed, wherein the system synchronization signal is the feedback signal according to frame synchronization handshake and generates；To provide the image data of every frame image segmentation part to the sub-screen of display curtain wall from output unit is locally displayed according to the frame synchronizing signal and clock signal.The present invention controls equipment using the inexpensive multi-screen of small-scale, uses identical reference clock and frame synchronization to show signal between distinct device, guarantees Pixel-level simultaneous display on different sub-screens.
Description
Technical field
The present invention relates to image display technology fields, specifically, being related to a kind of multi-screen control equipment and synchronization system.
Background technique
Multiple video display units are formed by an extra large screen using multi-screen controller in the prior art, commonly used in control
The image control of the large-scale tiled display curtain wall at center processed.
Current multi-screen controller is to support bigger display scale, and general there are two types of schemes.A kind of method is in list
Using the more extensive video channel exchange chip (Vedio Switch) of support in a cabinet, but since exchange chip can not be accomplished
Infinitely great scale, therefore most multipotency supports limited display screen.And the increase of video channel exchange chip scale will lead into
Originally it is multiplied, and makes large-scale single chassis overall cost very high.Another method is multiple monomer multi-screen controllers
Between transmit synchronous control command by the agreements such as network and realize that display synchronizes, this is known as dcs.
Application No. is 200880010219.2, disclosed in the application documents of Publication No. CN101647273A using point
The multi-screen sync reproduction system that cloth control is realized, but this scheme, there are network transfer delay, synchronization signal reaches different
Equipment when postpone a meeting or conference difference, and synchronism difference can be very big between different network environments.Because of different monomers controller
Read clock frequency difference and central processing unit it is different to the processing speed of display image, it usually needs after a period of time again
Synchronize calibration.
It is a kind of same being disclosed in the application documents of Publication No. CN101763840A application No. is 200910042304.3
Walk display system and its control method.This scheme needs individually external clock and frame synchronization control unit, increases
Use complexity.And since external unit is because of hardware limitation, it can only support that limited equipment is synchronous, can not accomplish bigger rule
Mould.The frame synchronizing signal used in the program is limited to only support the synchronization of VGA format output in this way for the HS signal of VGA, and
The display of the signals such as DVI, HDMI and SDI cannot be supported synchronous.
Therefore, a kind of technical solution that can be realized large-scale inexpensive multi-screen control equipment simultaneous display is needed.
Summary of the invention
The purpose of the invention is to overcome, multi-screen control device structure is complicated in the prior art and synchronous effect is poor
Technological deficiency.
In order to solve the above-mentioned technical problem, embodiments herein provides a kind of multi-screen control equipment first, for aobvious
Show in the sub-screen of curtain wall and show same video source across screen, comprising:
Clock generates and control unit, provides homologous clock signal as the clock signal that output unit is locally displayed；
Frame synchronization control unit generates the frame synchronizing signal that output unit is locally displayed according to system synchronization signal,
In, the system synchronization signal is to be generated according to the feedback signal of frame synchronization handshake；
Thus according to the frame synchronizing signal and clock signal from output unit is locally displayed to the sub-screen of display curtain wall
The image data of every frame image segmentation part is provided.
In one embodiment, the frame synchronization control unit includes:
Handshake processing module generates and sends frame synchronization handshake under major state；
System synchronous processing module receives the feedback signal of the frame synchronization handshake under major state, generates
And send the system synchronization signal.
In one embodiment, under control state,
The handshake processing module generates feedback signal for received frame synchronization handshake；
The system synchronous processing module receives the system synchronization signal.
In one embodiment, under control state, the system synchronous processing module turns the system synchronization signal
Hair.
In one embodiment, the clock generates and control unit includes:
Clock generation module, for generating local crystal oscillator clock signal；
Control module, for controlling phase-locked loop operation in overtone mode or bypass mode；
Wherein, under major state, phase-locked loop operation is in overtone mode, and local crystal oscillator clock signal is after frequency multiplication of phase locked loop
Generate the homologous clock signal；
Under control state, phase-locked loop operation follows clock signal as local aobvious in bypass mode, using received outside
Show the clock signal of output unit.
In one embodiment, the clock generates and control unit further comprises clock distribution block, in master
The homologous clock signal is distributed to being locally displayed output unit, and by the homologous clock signal output to make under control state
To follow clock signal.
In one embodiment, the clock distribution block is following clock signal to forward under control state by described.
In one embodiment, further includes:
Transmission unit, for sending the homologous clock signal, frame synchronization handshake, feedback signal letter synchronous with system
Number；
Receiving unit, for receiving the homologous clock signal, frame synchronization handshake, feedback signal letter synchronous with system
Number；
Wherein, the transmission unit and receiving unit include RJ-45 interface module, and the homologous clock signal passes through first
Differential transfer, the frame synchronization handshake or feedback signal are carried out to twisted pair, difference biography is carried out by second pair of twisted pair
Defeated, the system synchronization signal carries out differential transfer to twisted pair by third.
Embodiments herein also provides a kind of synchronization system of multi-screen control equipment, for the sub-screen in display curtain wall
In across screen show same video source, including a main equipment and at least one from equipment, wherein the main equipment is work in master
The multi-screen of control state controls equipment, and described to control equipment from the multi-screen of control state for work from equipment, the multi-screen control is set
For as described in any one of claims 1 to 8.
In one embodiment, the homologous clock signal of main equipment output, which is used as, follows clock signal, described in equipment reception
Follow clock signal as the clock signal that output unit is locally displayed；
Main equipment exports frame synchronization handshake, generates feedback signal to the frame synchronization handshake from equipment；
Main equipment receives the system from equipment and synchronizes based on all system synchronization signal is generated from the feedback signal of equipment
Signal is as the frame synchronizing signal that output unit is locally displayed.
In one embodiment, intergrade receives follow clock signal of the higher level from device forwards from equipment, and to next
Grade is from device forwards；
Intergrade receives the frame synchronization handshake that main equipment generates from equipment, or receives the needle that higher level generates from equipment
To higher level's feedback signal of frame synchronization handshake, the same level feedback signal of the same level from equipment is generated, the same level feedback signal is sent out
It send to next stage from equipment；
Based on final stage from the feedback signal generation system synchronization signal of equipment, intergrade receives higher level from equipment and sets main equipment
The system synchronization signal of standby forwarding, and to next stage from device forwards.
In one embodiment, the main equipment is separately connected from equipment and constitutes star topology, wherein
Main equipment exports homologous clock signal respectively to each from equipment；
Main equipment generates system synchronization signal after receiving all feedback signals from equipment.
Compared with prior art, embodiments herein controls equipment using the inexpensive multi-screen of small-scale, and difference is set
Signal is shown using identical reference clock and frame synchronization between standby, guarantees Pixel-level simultaneous display on different sub-screens.This hair
The bright vision signal simultaneous display that can support the different-formats such as VGA, DVI, HDMI and SDI.
The embodiment of the present invention is without increasing individually external clock and frame synchronization control unit, main equipment and can from equipment
Cascade connection constitutes the synchronization system of a variety of topological forms, supports any number of equipment cascading.Using general 5 class lines and
RJ-45 interface module realizes cascade connection, and cost performance is high, versatile, facilitates engineer application.Cascade between equipment is using poor
Divide transmission synchronised clock and signal, strong antijamming capability.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example and is used together to explain the present invention, be not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is principle schematic diagram of the mono signal source according to an embodiment of the present invention across screen display；
Fig. 2 is the structure chart of the built-in sync control device of multi-screen controller according to an embodiment of the present invention；
Fig. 3 is the structure chart of clock generation and control module according to an embodiment of the present invention；
Fig. 4 is the structure chart of frame synchronization control module according to an embodiment of the present invention；
Fig. 5 is the connection mode schematic diagram according to an embodiment of the present invention for sending or receiving interface module；
Fig. 6 is the synchronization system annular cascade schematic diagram of multi-screen control equipment according to an embodiment of the present invention；
Fig. 7 is the synchronization system star-like connection schematic diagram of multi-screen control equipment according to an embodiment of the present invention；
Fig. 8 is the principle schematic diagram that synchronization signal is moved towards in synchronization system according to an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made below in conjunction with attached drawing further
Ground is described in detail.
The application scenarios of the embodiment of the present invention are illustrated first.Since signal source can not lead between many motors control equipment
It crosses and is transmitted similar to the High speed rear panel lane video channel on specific installation, the present embodiment will all the way using video branch apparatus
Video source is decomposed into the same source video signal of multichannel.In the example of fig. 1, display curtain wall is by three of 3X5,4X5 and 1X5 respectively
The big curtain wall for the 8X5 that sub-screen is spliced, a frame video image are completed after passing through 3 multi-screen control equipment processing respectively
It is shown across screen.As shown in Figure 1, the different output port of video branch apparatus is connected to the input port of multi-screen control equipment, multi-screen
Equipment is controlled by after every frame image segmentation, tiled display area is output to by delivery outlet, to realize spelling across screen for video image
Connect display.
In order to ensure the synchronism shown in three sub-screens, the present embodiment mentions between different multi-screen control equipment
For identical reference clock and frame synchronizing signal, to keep the read clock of multi-screen control equipment synchronous, and guarantee different more
The output of same frame image is synchronous in screen control equipment.
Specifically, the multi-screen control equipment of the embodiment of the present invention includes built-in sync control device and is locally displayed defeated
Unit out, wherein built-in sync control device provides synchronization signal for output unit is locally displayed.Refering to what is shown in Fig. 2, built-in same
Step control device includes that clock generates and control unit, frame synchronization control unit.Wherein, clock generates and control unit is for mentioning
For homologous clock signal as the clock signal that output unit is locally displayed, frame synchronization control unit is used to believe according to system is synchronous
It number generates and the frame synchronizing signal of output unit is locally displayed, thus according to the frame synchronizing signal and clock signal by being locally displayed
Output unit provides the image data of every frame image segmentation part to the sub-screen of display curtain wall.
In following example, multi-screen control equipment 1 is main equipment in Fig. 1, and it is from equipment that multi-screen, which controls equipment 2 and 3,.For
Guarantee the read clock stringent synchronization of multi-screen control equipment, the clock signal that main equipment is generated as homologous clock signal,
The homologous clock signal is followed from equipment.In addition, in order to guarantee each frame video image divide display when start simultaneously at it is aobvious
Show, the present embodiment realizes frame synchronization using frame synchronization handshake and system synchronization signal.Specifically, main equipment receives entirely
Portion generates system synchronization signal and is sent to from equipment after feedback signal of the equipment to frame synchronization handshake.It is received from equipment
Start when to the system synchronization signal from output unit is locally displayed to the image information of display sub-screen output segmentation.In this way with
Come, same frame image starts simultaneously at display on different sub-screens, and each segmented image block can export simultaneously.
Clock is generated referring to Fig. 3 and the function of control unit is described in detail.Clock generates and control unit
Including clock generation module, phase-locked loop pll, control module and clock distribution block.When clock generation module is for generating reference
Clock ref_clk.Phase-locked loop pll can carry out process of frequency multiplication to reference clock.Under the action of control module, PLL works in frequency multiplication
Mode or bypass (BYPASS) mode.Clock distribution block distributes homologous clock signal to output unit is locally displayed, or
Homologous clock signal is exported and follows clock signal to provide by person.
In a preferred mode, clock generation module is a crystal oscillator, for generating local crystal oscillator clock letter
Number be used as reference clock ref_clk.Under major state, PLL works in overtone mode, according to actual needs to reference clock
Ref_clk carries out process of frequency multiplication and generates 65M~162M homologous clock signal such as not, by clock distribution block by homologous clock
Signal is locally displayed the clock signal of output unit as main equipment, and by homologous clock signal output using as from equipment with
With clock signal.Under control state, phase-locked loop operation follows clock signal as display in bypass mode, using received outside
The local synchronization signal of clock that is, as the clock signal of output unit is locally displayed from equipment, and will follow clock signal to turn
Give level-one.
It is illustrated referring to function of the Fig. 4 to frame synchronization control unit.Frame synchronization control unit includes handshake
Processing module and system synchronous processing module.Under major state, handshake processing module generates and sends frame synchronization and shakes hands
Signal, it is desirable that other equipment enter frame synchronization and prepare state.Frame synchronization handshake is received from equipment and combines local frame state
Indication signal generates feedback signal, indicates synchronous preparation whether should have been carried out from equipment.The system synchronous processing module of main equipment
System synchronization signal is generated after receiving the feedback signal, the frame synchronizing signal of output unit is locally displayed as main equipment,
And one step system synchronization signal is exported, make to be generated from equipment according to the system synchronization signal and from equipment output unit be locally displayed
Frame synchronizing signal.
In a preferred example, frame synchronization handshake, feedback signal and system synchronization signal are by low and high level
Signal indicates.Under major state, handshake processing module generates and sends frame synchronization handshake (high level " 1 "),
It asks from equipment and enters frame synchronization preparation state.
Local frame state instruction letter is generated from equipment according to the preparation state of image data in local display output unit
Number.By taking frame rate is 60Hz as an example, the frame-scan period of display output unit is 0.017 second.It is in a frame-scan period
Display output unit prepares image data, and local frame condition indicative signal is low level " 0 ".After complete frame-scan period
The preparation of image data is completed, local frame condition indicative signal is high level " 1 ".
Frame synchronization handshake (high level " 1 ") is received from equipment, carries out with operation with local frame condition indicative signal
Generate the feedback signal to frame synchronization handshake.Specifically, it if local frame condition indicative signal is low level " 0 ", produces
Raw feedback signal is low level " 0 ", indicates from equipment and does not enter frame synchronization preparation state.If local frame condition indicative signal
For high level " 1 ", then the feedback signal generated is high level " 1 ", indicates that entering frame synchronization from equipment prepares state, can synchronize aobvious
Show video frame.
The system synchronous processing module of main equipment receives feedback signal " 0 " or " 1 " of frame synchronization handshake, generates system
Synchronization signal.In the case where feedback signal is low level " 0 ", system synchronization signal is low level " 0 ", indicates that the system is synchronous
Signal is unavailable.In the case where feedback signal is high level " 1 ", system synchronization signal is high level " 1 ", indicates that the system is same
Walking signal can be used, and the frame synchronizing signal that output unit be locally displayed can be generated according to system synchronization signal.
Fig. 2 is turned again to, it further includes transmission unit and receiving unit that multi-screen, which controls equipment,.Transmission unit is described for sending
Homologous clock signal, frame synchronization handshake, feedback signal and system synchronization signal；Receiving unit is for when receiving described homologous
Clock signal, frame synchronization handshake, feedback signal and system synchronization signal.From transmission, the versatility of receiving interface and the scene and
Wire rod simplification, the cost performance etc. of constructing consider, RJ-45 interface module is arranged in transmission unit and receiving unit, above-mentioned same
Source clock signal, frame synchronization handshake, feedback signal and system synchronization signal are respectively adopted pairs of twisted-pair wire and utilize difference
The transmission of LVDS signal.
As shown in figure 5, transmitting above-mentioned signal using three pairs of twisted pairs in a RJ-45 interface module, wherein homologous
Clock signal carries out differential transfer by first pair of twisted pair, and frame synchronization handshake or feedback signal pass through second pair of multiple twin
Line carries out differential transfer, and system synchronization signal carries out differential transfer to twisted pair by third.It is tested by actual measurement and function
It demonstrate,proves, in the case of highest synchronised clock 162MHz, by 10m CAT-5e cable transmission, the indexs such as wave-shape amplitude and shake are completely full
Sufficient LVDS level standard, and the transmission range of 10m can satisfy site operation requirement completely.
Using above-mentioned interface scheme, main equipment and from equipment can cascade connection constitute the synchronization systems of a variety of topological forms.
Fig. 6 and Fig. 7 respectively illustrates the network topology of annular networking and star-like networking, without being limited thereto, and annular can also be used and mix with star-like
It is synchronous to be combined net realization system.General 5 class lines and RJ-45 interface module are used in the present embodiment, cost performance is high, versatility
By force, facilitate engineer application.Cascade between equipment uses differential transfer synchronised clock and signal, strong antijamming capability.
In the synchronization system of Fig. 6 and multi-screen shown in Fig. 7 control equipment, main equipment export homologous clock signal be used as with
With clock signal, from equipment receive described in follow clock signal as the clock signal that output unit is locally displayed.Main equipment is defeated
Frame synchronization handshake out, it is desirable that enter frame synchronization from equipment and prepare state.The frame synchronization handshake is generated from equipment
Feedback signal, to notify main equipment to complete frame synchronization preparation.Main equipment is based on all from the feedback signal of equipment generation system
System synchronization signal, receives the system synchronization signal as the frame synchronizing signal that output unit is locally displayed from equipment.So not
Individually external clock and frame synchronization control unit are needed, equipment is controlled only with low cost, small-scale multi-screen, utilizes equipment
Cascade network can complete the simultaneous display of Pixel-level by using identical reference clock and frame synchronizing signal.
The working principle of the synchronization system of two kinds of topological forms of annular cascade and star-like cascade is illustrated individually below.
The annular cascade network being made of a main equipment and two from equipment is shown in the example of fig. 6.In Fig. 6
In, main equipment is successively cascaded from equipment 1 and from equipment 2, i.e., by receiving unit and transmission unit sequentially cascade connection formed with
Ring topology.Main equipment generates homologous clock transfer to from equipment 1, from equipment 1 by the homologous clock-forwarding to from equipment 2, this
The homologous clock that sample follows main equipment 1 to generate from equipment 1 and 2.As described above, the homologous clock that main equipment generates can root
It is set as 65M~162M according to video card demand, is not required to carry out process of frequency multiplication again to the homologous clock from equipment, it can be to avoid existing
Frequency difference caused by frequency multiplier is used from equipment in technology.Due to no longer carrying out frequency multiplication operation from the device, transported in long-time
Frequency difference accumulation will not be generated after row.
Main equipment generates frame synchronization handshake and is transferred to from equipment 1, generates from the frame synchronization control unit of equipment 1 to this
The feedback signal of frame synchronization handshake is transferred to from equipment 2.The feedback signal generated from equipment 1 indicates main equipment and from setting
Whether standby 1 be completed the preparation of frame synchronization, and requires to enter frame synchronization preparation state from equipment 2.From equipment 2 receive from
After the feedback signal that equipment 1 generates, feedback signal transmission is generated to main equipment.From equipment 2 generate feedback signal indicate from
Equipment 1 and from equipment 2 whether complete frame synchronization preparation.Since in this way, main equipment is from final stage from equipment (from equipment 2)
Feedback signal can determine whether that the slave equipment in system has entered frame synchronization preparation.As long as there are one from equipment 1 and 2
Equipment generate feedback signal be low level " 0 ", then final stage from the feedback signal of equipment (from equipment 2) be " 0 ".
It is emphasized that design of feedback signal prepares in the present embodiment to indicate that frame synchronization is completed in equipment, avoid leading
Display caused by image data is not yet ready for since output unit is locally displayed from equipment when equipment sends system synchronization signal
Mistake.Main equipment is received from generation system synchronous transmission of signal after the feedback signal of equipment 2 to from equipment 1 and from equipment 2, with
So that armamentarium is using the system synchronization signal as the frame synchronizing signal that output unit is locally displayed in system.As long as final stage
The feedback signal generated from equipment (from equipment 2) is low level " 0 ", then the system synchronization signal that main equipment generates is low level
" 0 ", exists in expression system and does not complete the equipment that frame synchronization prepares, and the system synchronization signal is unavailable.
In the cascade synchronization system of annular, any number of equipment cascading can be supported.Intergrade is from equipment reception
Grade is from the clock signals that follows of device forwards, and to next stage from device forwards.Intergrade receives what main equipment generated from equipment
Frame synchronization handshake, or higher level's feedback signal for frame synchronization handshake that higher level generates from equipment is received, it generates
The same level feedback signal is sent to next stage from equipment from the same level feedback signal of equipment by the same level.Main equipment is based only on final stage
Can determine whether prepare state from whether equipment has entered frame synchronization in system from the feedback signal of equipment.Main equipment generation system
Synchronization signal, intergrade receive the system synchronization signal that higher level equipment forwards from equipment, and to next stage from device forwards, so that
Armamentarium is using the system synchronization signal as frame synchronizing signal in system.
Fig. 8 is the principle schematic diagram of synchronization signal trend.In order to which each frame image is same on distinct device in guarantee system
Step output guarantees to guarantee segmentation block 1 when the display of each frame image segmentation, divides the image of block 2 ... while exporting, will be different
Main equipment is transmitted to the feedback signal of frame synchronization handshake from equipment.It is all completed from equipment in main equipment judgement
Generation system synchronous transmission of signal receives the system synchronization signal from equipment to each from equipment after frame synchronization preparation
Start afterwards to from output unit is locally displayed to the data of display sub-screen output partitioning portion image.
In addition, frame synchronization is completed using individual frame synchronization handshake and system synchronization signal in the present embodiment, from
And the display of the signals such as VGA, DVI, HDMI and SDI can be supported synchronous.
The star-like cascade network being made of a main equipment and two from equipment is shown in the example in figure 7.Main equipment
It is separately connected from equipment and constitutes star topology, main equipment exports homologous clock signal respectively to each from equipment.Main equipment exists
It receives and all generates system synchronization signal after the feedback signal of equipment.The working principle of synchronization signal is as shown in Figure 8.
Unlike annular cascade, main equipment receives each feedback signal from equipment respectively in Fig. 7.It is complete receiving
Portion is after the feedback signal of equipment, to all carrying out with operation and generation system synchronization signal from the feedback signal of equipment.
As long as the system synchronization signal of generation is in this way, it is low level " 0 " that there are one from the feedback signal of equipment in Star Network
Low level " 0 ".To guarantee just generate the synchronous letter of efficient system after all completing frame synchronization preparation from equipment
Number.In star-like cascade synchronization system, it is not required to carry out frame synchronization handshake and system synchronization signal on relaying turn from equipment
Hair, thus it is lower to the performance requirement from equipment.
While it is disclosed that embodiment content as above but described only to facilitate understanding the present invention and adopting
Embodiment is not intended to limit the invention.Any those skilled in the art to which this invention pertains are not departing from this
Under the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But scope of patent protection of the invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (12)
1. a kind of multi-screen controls equipment, for showing same video source across screen in the sub-screen of display curtain wall, which is characterized in that
Include:
Clock generates and control unit, provides homologous clock signal as the clock signal that output unit is locally displayed；
Frame synchronization control unit generates the frame synchronizing signal that output unit is locally displayed according to system synchronization signal, wherein institute
System synchronization signal is stated to generate according to the feedback signal of frame synchronization handshake；
To be provided from output unit is locally displayed to the sub-screen of display curtain wall according to the frame synchronizing signal and clock signal
The image data of every frame image segmentation part；
Wherein, frame synchronization handshake prepares state for requiring other multi-screens control equipment to enter frame synchronization.
2. multi-screen according to claim 1 controls equipment, which is characterized in that the frame synchronization control unit includes:
Handshake processing module generates and sends frame synchronization handshake under major state；
System synchronous processing module receives the feedback signal of the frame synchronization handshake under major state, generates concurrent
Send the system synchronization signal.
3. multi-screen according to claim 2 controls equipment, which is characterized in that under control state,
The handshake processing module generates feedback signal for received frame synchronization handshake；
The system synchronous processing module receives the system synchronization signal.
4. multi-screen according to claim 3 controls equipment, which is characterized in that under control state, the system is synchronous
Reason module forwards the system synchronization signal.
5. multi-screen according to claim 1 controls equipment, which is characterized in that the clock generates and control unit includes:
Clock generation module, for generating local crystal oscillator clock signal；
Control module, for controlling phase-locked loop operation in overtone mode or bypass mode；
Wherein, under major state, phase-locked loop operation generates after frequency multiplication of phase locked loop in overtone mode, local crystal oscillator clock signal
The homologous clock signal；
Under control state, phase-locked loop operation follows clock signal defeated as being locally displayed in bypass mode, using received outside
The clock signal of unit out.
6. multi-screen according to claim 5 controls equipment, which is characterized in that the clock generates and control unit is further
Including clock distribution block, for the homologous clock signal to be distributed to output unit is locally displayed under major state, and
By the homologous clock signal output using as following clock signal.
7. multi-screen according to claim 6 controls equipment, which is characterized in that the clock distribution block is under control state
Clock signal is followed to forward by described.
8. multi-screen according to claim 1 controls equipment, which is characterized in that further include:
Transmission unit, for sending the homologous clock signal, frame synchronization handshake, feedback signal and system synchronization signal；
Receiving unit, for receiving the homologous clock signal, frame synchronization handshake, feedback signal and system synchronization signal；
Wherein, the transmission unit and receiving unit include RJ-45 interface module, and the homologous clock signal is double by first pair
Twisted wire carries out differential transfer, the frame synchronization handshake or feedback signal and carries out differential transfer by second pair of twisted pair,
The system synchronization signal carries out differential transfer to twisted pair by third.
9. a kind of synchronization system of multi-screen control equipment, for showing same video source across screen in the sub-screen of display curtain wall,
It is characterised in that it includes main equipment and at least one from equipment,
Wherein to be work control equipment in the multi-screen of major state for the main equipment, it is described from equipment be work from control state
Multi-screen controls equipment, and the multi-screen control equipment is as described in any one of claims 1 to 8.
10. the synchronization system of multi-screen control equipment according to claim 9, which is characterized in that
The homologous clock signal of main equipment output, which is used as, follows clock signal, local from following clock signal to be used as described in equipment reception
The clock signal of display output unit；
Main equipment exports frame synchronization handshake, generates feedback signal to the frame synchronization handshake from equipment；
Main equipment receives the system synchronization signal from equipment based on all system synchronization signal is generated from the feedback signal of equipment
As the frame synchronizing signal that output unit is locally displayed.
11. the synchronization system of multi-screen according to claim 10 control equipment, which is characterized in that the main equipment and from setting
Standby sequentially cascade connection is formed with ring topology, wherein
Intergrade receives follow clock signal of the higher level from device forwards from equipment, and to next stage from device forwards；
Intergrade from equipment receive main equipment generate frame synchronization handshake, or receive higher level is generated from equipment be directed to frame
Higher level's feedback signal of synchronous handshake, generates the same level feedback signal of the same level from equipment, the same level feedback signal is sent to
Next stage is from equipment；
Based on final stage from the feedback signal generation system synchronization signal of equipment, intergrade receives higher level equipment from equipment and turns main equipment
The system synchronization signal of hair, and to next stage from device forwards.
12. the synchronization system of multi-screen control equipment according to claim 10, which is characterized in that the main equipment connects respectively
It connects from equipment and constitutes star topology, wherein
Main equipment exports homologous clock signal respectively to each from equipment；
Main equipment generates system synchronization signal after receiving all feedback signals from equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510170273.5A CN106161870B (en) | 2015-04-10 | 2015-04-10 | A kind of multi-screen control equipment and synchronization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510170273.5A CN106161870B (en) | 2015-04-10 | 2015-04-10 | A kind of multi-screen control equipment and synchronization system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106161870A CN106161870A (en) | 2016-11-23 |
| CN106161870B true CN106161870B (en) | 2019-09-13 |
Family
ID=57336767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510170273.5A Active CN106161870B (en) | 2015-04-10 | 2015-04-10 | A kind of multi-screen control equipment and synchronization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106161870B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108632499B (en) * | 2017-03-15 | 2020-12-11 | 深圳开阳电子股份有限公司 | Image signal processor and time sequence generating device thereof |
| CN108389329A (en) * | 2018-02-06 | 2018-08-10 | 奥佳华智能健康科技集团股份有限公司 | A kind of shared massage armchair |
| CN108898985B (en) * | 2018-08-01 | 2021-09-28 | 大连海事大学 | Master-slave optical fiber video playing system |
| 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 |
| WO2020061785A1 (en) * | 2018-09-26 | 2020-04-02 | 西安诺瓦电子科技有限公司 | Video frame synchronization system, video processing device and video frame synchronization method |
| CN109857691B (en) * | 2019-01-04 | 2021-07-30 | 北京航天晨信科技有限责任公司 | Bus cascadable integrated communication equipment and multichannel time division multiplexing transmission method |
| CN111949068B (en) * | 2019-05-14 | 2022-12-13 | 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 |
| 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 |
| CN112687226B (en) * | 2020-12-30 | 2023-03-10 | 北京奕斯伟计算技术股份有限公司 | Driving method, driving device and display device |
| 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 |
| 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 |
| CN115426515B (en) * | 2022-08-03 | 2024-05-10 | 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101697276A (en) * | 2009-10-29 | 2010-04-21 | 广东威创视讯科技股份有限公司 | Cascade transmission method and cascade device of image signal |
| CN102097085A (en) * | 2010-12-25 | 2011-06-15 | 广东威创视讯科技股份有限公司 | Method and device for identifying system spliced by multiple display units |
| CN102291524A (en) * | 2011-08-31 | 2011-12-21 | 广东威创视讯科技股份有限公司 | Method for transmitting control information in wall splicing system and wall splicing system |
| CN103606367A (en) * | 2013-11-22 | 2014-02-26 | 广东威创视讯科技股份有限公司 | Signal cascade transmission method and signal cascade device |
| CN104375789A (en) * | 2013-08-14 | 2015-02-25 | 杭州海康威视数字技术股份有限公司 | Synchronous displaying method and system of tiled display screen |
-
2015
- 2015-04-10 CN CN201510170273.5A patent/CN106161870B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101697276A (en) * | 2009-10-29 | 2010-04-21 | 广东威创视讯科技股份有限公司 | Cascade transmission method and cascade device of image signal |
| CN102097085A (en) * | 2010-12-25 | 2011-06-15 | 广东威创视讯科技股份有限公司 | Method and device for identifying system spliced by multiple display units |
| CN102291524A (en) * | 2011-08-31 | 2011-12-21 | 广东威创视讯科技股份有限公司 | Method for transmitting control information in wall splicing system and wall splicing system |
| CN104375789A (en) * | 2013-08-14 | 2015-02-25 | 杭州海康威视数字技术股份有限公司 | Synchronous displaying method and system of tiled display screen |
| CN103606367A (en) * | 2013-11-22 | 2014-02-26 | 广东威创视讯科技股份有限公司 | Signal cascade transmission method and signal cascade device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106161870A (en) | 2016-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106161870B (en) | A kind of multi-screen control equipment and synchronization system | |
| JP6401716B2 (en) | Synchronous signal processing method and apparatus for stereoscopic display of splice screen, splice screen | |
| CN103021378B (en) | A kind of device for multi-screen mosaic display and method | |
| CN107465474B (en) | The clock synchronization system and method for digital control system bus apparatus | |
| US10453424B2 (en) | Method and apparatus for controlling a display comprising two or more panels | |
| WO2002086745A2 (en) | System and method for synchronization of video display outputs from multiple pc graphics subsystems | |
| CN102323877B (en) | SERDES-based video processing system | |
| CN110572532B (en) | Synchronization device for splicer and splicing processing system | |
| CN106528025A (en) | Multi-screen image screen-projection method, terminal, server and system | |
| CN102262523A (en) | Display card, multi-screen display system and multi-screen synchronous display method | |
| CN113377313B (en) | Multi-screen multiplexing display device and method | |
| CN106303298A (en) | A kind of video signal output circuit structure, electronic equipment, terminal and system | |
| CN111355861A (en) | Multi-screen video synchronous splicing device and method | |
| CN106161987B (en) | A kind of more image Display on the same screen methods and more image Display on the same screen systems | |
| CN106507017A (en) | A kind of fpga chip for realizing V BY ONE and corresponding V BY ONE processing methods | |
| CN103503466A (en) | Method and apparatus for fast data delivery on a digital pixel cable | |
| CN103019639A (en) | Multiprocessor spliced synchronous display system | |
| CN103838533B (en) | The synchronous method of figure signal and sync card in computer cluster splice displaying system | |
| CN116055779B (en) | Video mode chip data stream transmission time sequence control method and device | |
| CN107682587B (en) | Video processor | |
| CN105590603A (en) | Source electrode driver and display system | |
| CN105022600B (en) | Figure synchronizer and synchronous method in computer cluster splice displaying system | |
| CN111124335A (en) | Remote-viewer-based cloud desktop multi-window display method and system | |
| CN106097982A (en) | Method for controlling backlight thereof, device and liquid crystal indicator in liquid crystal indicator | |
| CN210466366U (en) | Zero second signal pushing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |