CN109147650A - Show synchronisation control means and device and display screen control system - Google Patents
Show synchronisation control means and device and display screen control system Download PDFInfo
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- CN109147650A CN109147650A CN201710509235.7A CN201710509235A CN109147650A CN 109147650 A CN109147650 A CN 109147650A CN 201710509235 A CN201710509235 A CN 201710509235A CN 109147650 A CN109147650 A CN 109147650A
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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]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/12—Synchronisation between the display unit and other units, e.g. other display units, video-disc players
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- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The embodiment of the invention discloses a kind of display synchronisation control means, comprising: detection frame synchronous start point；Current frame scan is carried out to drive target display screen to show current frame image；Judge whether a wheel scan is completed in present frame scanning process；Judge whether next frame synchronization starting point has been detected by after the completion of a wheel scan in present frame scanning process；If judging next frame synchronization starting point it has been detected that switching shows data and carries out next frame scanning to drive the target display screen to show next frame image.The embodiment of the invention also discloses relevant display screen control systems and display sync control device.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of display synchronisation control means, a kind of display screen control system
System and a kind of display sync control device.
Background technique
Grand LED Screen system mainly includes PC machine, sends controller, receives card array and LED box；PC machine
Video card output image data by send controller after, by the different network interface of transmission controller export give receive card array.By
Between the reception card array of different network interface connections for sending controller and in the reception card array of the same network interface connection
Between each reception card not in correspondence with, the corresponding display driving received between card of different LED boxes needs sending
It is synchronized under the field sync signal of controller, causes LED screen to show to prevent asynchronous between LED box
Show asynchronous and leads to picture break-up phenomenon.
The field frequency of different video card outputs be it is different, have the field frequencies such as 50hz, 60hz.And under 60hz field frequency, it is different
Video card output nor discrepant, different video card field frequencies can be swung near centre frequency.General LED display system
System can set aside some time to adapt to different field frequency inputs, if LED display screen system processing is unreasonable, if the reserved time is too
Greatly, there is black field problem with regard to will appear effect of taking pictures, if set aside some time not enough, with regard to will appear frame losing problem.
It therefore,, can be by parameter corresponding under each field frequency when configuration parameter in existing LED display screen system
It is uniformly issued to the display parameters memory block received on card to be stored, when there is field frequency variation, receiving card can be by different frame
Frequency identifies and reads out corresponding display parameters from display parameters memory block according to the frame frequency identified and drives for display
It is dynamic to be used.So, it receives and is stuck in when carrying out display driving and can search and read out according to the field frequency for sending controller output
Corresponding display parameters show to carry out image-driven.
From the foregoing, it will be observed that additional memory space is needed to be used to store the display parameters for corresponding to different frame frequencies in the prior art,
And since the classification of frame frequency is very more, all frame frequency demands are unable to satisfy, thus there are still the synchronizations under different frame frequencies
Problem.Moreover, parameter is arranged for different display screen bodies, is likely to result in black field time ratio under same frame frequency mode
It is longer.
Summary of the invention
The embodiment of the present invention provides a kind of display synchronisation control means, a kind of display screen control system and a kind of display
Sync control device solves the problems, such as that the prior art needs extra storage resource overhead for synchronizing under different frame frequencies.
On the one hand, a kind of display synchronisation control means is provided, comprising: detection frame synchronous start point；Work as what is detected
Start to carry out current frame scan under the triggering of previous frame synchronous start point to drive target display screen to show current frame image, wherein institute
State that the scanning mode that target display screen uses is swept for 1/N and N is positive integer greater than 1；One is judged in present frame scanning process
Whether wheel scan is completed, wherein each wheel scan includes the n times row scanning sequentially carried out；When a wheel in present frame scanning process
Judge whether next frame synchronization starting point has been detected by after the completion of scanning；If judging, next frame synchronization starting point has been examined
It measures, switching display data simultaneously carry out next frame scanning to drive the target display screen to show next frame image.
In another aspect, providing a kind of display screen control system, comprising: send controller, receive card array and LED case
Body；The reception card array is connected between the transmission controller and the LED box.In the reception card array at least
One reception card is configured to: detection frame synchronous start point；Start under the triggering of the present frame synchronous start point detected into
Frame scan to be before the trade to drive target display screen to show current frame image, wherein the scanning mode that uses of the target display screen for
1/N is swept and N is the positive integer greater than 1；Judge whether a wheel scan is completed in present frame scanning process, wherein each wheel scan
Including the n times row scanning sequentially carried out；If judging, next frame synchronization starting point is not detected, and is continued in present frame scanning process
It is middle to carry out next wheel scan；If judging next frame synchronization starting point it has been detected that switching shows data and carries out next frame
Scanning is to drive the target display screen to show next frame image.
On the other hand, a kind of display sync control device is provided, comprising: detection module, for the synchronous starting of detection frame
Point；Driver module, for starting to carry out current frame scan under the triggering of the present frame synchronous start point detected to drive
Moveing target indication screen shows current frame image；First judgment module, for judging that a wheel scan is in present frame scanning process
No completion；Second judgment module, for judging that next frame synchronization rises when the wheel scan after the completion of in present frame scanning process
Whether initial point has been detected by.Wherein, the driver module is also used to: when judging that next frame synchronization starting point do not detect
Then continue to carry out next wheel scan in present frame scanning process, and works as and judge that next frame synchronization starting point has detected
Then switching shows data and carries out next frame scanning to drive the target display screen to show next frame image.
A technical solution in above-mentioned technical proposal has the following advantages that or the utility model has the advantages that by judging that a wheel scan is
It is no to complete and judge whether next frame synchronization starting point has been detected by the two Rule of judgment while meeting to determine and carry out
Display data switching is to drive the opportunity for showing next frame image, because without corresponding display under each field frequency is stored in advance
Parameter can save the expense of storage resource.Furthermore row scanning was filled in all time, when there is no black field
Between occur, to can avoid the black field problem taken pictures.
Another technical solution in above-mentioned technical proposal has the following advantages that or the utility model has the advantages that by judging a wheel scan
Whether complete and judge next frame synchronization starting point whether have been detected by the two Rule of judgment and meanwhile meet determine into
Row display data switching is to drive the opportunity of display next frame image, namely proposes the new display synchronous method of one kind and be not required to
Want additional storage resource, thus the black field problem that can solve the stationary problem of large screen display screen system and take pictures.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without creative efforts, it can also be obtained according to these attached drawings others
Attached drawing.
Fig. 1 is the flow diagram of the display synchronisation control means in first embodiment of the invention；
Fig. 2 is a kind of signal timing diagram for being relevant to display synchronisation control means shown in Fig. 1；
Fig. 3 is the configuration diagram of the display screen control system of second embodiment of the invention；
Fig. 4 is the module diagram of the display sync control device of third embodiment of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
First embodiment
As shown in Figure 1, a kind of display synchronisation control means provided in first embodiment of the invention, comprising steps of
S11: detection frame synchronous start point；
S13: current frame scan is carried out to drive target display screen to show current frame image；
S15: judge whether a wheel scan is completed；
S17: judge whether next frame synchronization starting point has been detected by；And
S19: switching display data simultaneously carry out next frame scanning to drive target display screen to show next frame image.
The present embodiment for ease of understanding carries out the step S11-S19 in the present embodiment below with reference to Fig. 1 and Fig. 2 citing
Detailed description are as follows.
In step s 11, the frame synchronization starting point of each frame image is detected；As shown in Fig. 2, by the rising of frame synchronizing signal
Along frame synchronization starting point is used as, then step S11 persistently detects the rising edge of frame synchronizing signal and saves testing result for subsequent
Judgement is used.It is, of course, understood that can also be using the failing edge of frame synchronizing signal as frame synchronization starting point, even
Using the combination of the failing edge of frame synchronizing signal and rising edge as frame synchronization starting point.
In step s 13, when detecting a frame synchronization starting point, then in the touching of the present frame synchronous start point detected
It gives and carries out current frame scan to drive target display screen to show current frame image.As shown in Fig. 2, it is in present frame synchronization onwards
Starting generation scanning signal under the triggering of initial point to be scanned by wheel, each wheel scan includes the 4 rows scanning sequentially carried out,
The scanning mode that corresponding target display screen uses is swept for 1/4.Certainly, it is only to lift that a wheel scan shown in Fig. 2, which includes 4 row scanning,
Example, being also possible to includes the scanning of n times row and N is the positive integer greater than 1, corresponds to the scanning mode that target display screen uses as 1/
N is swept.
It is typically every to carry out 1 primary judgement of row scanning execution in step S15, if epicycle (or working as front-wheel) is swept
Retouch unfinished, namely do not complete continuous 4 rows scanning shown in Fig. 2, the judging result for corresponding to step S15 is "No", then after
It is continuous to carry out the remaining row scanning of epicycle；If otherwise this wheel scan has been completed, namely has completed continuous 4 rows shown in Fig. 2
Scanning, the judging result for corresponding to step S15 is "Yes", then carries out step S17.
In step S17, typically one wheel scan of every completion executes primary judgement, if sentencing after completing a certain wheel scan
Disconnected to obtain next frame synchronization starting point and be not detected, the judging result for corresponding to step S17 is "No", then continues current
Next wheel scan during frame scan；Conversely, if judgement obtains next frame synchronization starting point after completing a certain wheel scan
It has been detected that its judging result for corresponding to step S17 is "Yes", then step S19 is carried out.In addition, from Fig. 2 it can be found that
It is after having carried out four wheel scans in present frame scanning process just judgement obtain next frame synchronization starting point it has been detected that
If current wheel scan does not complete (such as fourth round scans in Fig. 2) but next frame synchronization starting point (such as the in Fig. 2
Two frame synchronization starting points) it is practical it has been detected that still due to not will do it step S17, institute when current wheel scan does not complete
Still will do it current wheel scan until can just execute step S17 again after the completion.
In step S19, completes when judgement obtains a wheel scan and judge to have obtained next frame synchronization starting point
It is detected the two conditions while being met, then can generate scanning field sync signal to trigger and carry out display data switching, namely
Current frame image data are switched into next frame image data, will do it next frame scanning just next to drive target display screen
Show next frame image.Such as in Fig. 2, each down pulse represents the trigger signal of switching display data, and from Fig. 2
In it has also been found that: first in scanning field sync signal between second down pulse there are four wheel scans, and second
A there are three wheel scans between third down pulse, that is to say, that the frame scan process of corresponding different frame, what is carried out sweeps
Retouching wheel number may be different.
In conclusion in the present embodiment, by judging next frame synchronization starting is completed and judged to a wheel scan whether
Whether point has been detected by the two Rule of judgment while meeting to determine and carry out display data switching to drive display next frame
The opportunity of image, because opening for storage resource can be saved without corresponding display parameters under each field frequency are stored in advance
Pin.Furthermore row scanning was filled in all time, it there is no that black field time occurs, to can avoid the black field taken pictures
Problem.
Second embodiment
As shown in figure 3, a kind of display screen control system 30 provided in second embodiment of the invention, comprising: send control
Device 31 receives card array 33 and LED display 35.Wherein, send controller 31 can by video interface such as DVI interface or
HDMI interface, which connects PC machine and connected by one or more network interface via cable, receives card array 33.Receive card array 33
Can be and receive card including a string of receptions card or more concatenation, each concatenation receive card include receptions block 331 or pass through cable or its
Multiple cascade reception cards 331 of its medium.Each receives card 331 for example by the correspondence in winding displacement connection LED display 35
LED box 351, each reception card 331 can directly lead to by winding displacement or after first passing through HUB plate progress Interface Expanding again certainly
It crosses winding displacement and connects corresponding LED box 351.It, can also be with furthermore LED display 35 can be including a LED box 351
It is to be spliced by multiple LED boxes 351.In addition it is noted that single led cabinet 351 may include a LED lamp panel
Or cascade multiple LED lamp panels.
Hold above-mentioned, in the present embodiment, each receives the synchronous control of display that card 331 is configured to execute aforementioned first embodiment
Method processed, details are not described herein for specific steps.In the present embodiment, different receptions card 331 is same in the scanning field respectively generated
It is synchronous to walk completion LED box 351 under signal, scanning signal is almost full within all time (referring to fig. 2 shown in citing), base
No black field time occurs in sheet, to avoid the black field problem taken pictures.
3rd embodiment
As shown in figure 4, a kind of display sync control device 40 provided in third embodiment of the invention, comprising: detection mould
Block 41, driver module 43, first judgment module 45 and the second judgment module 47.The display sync control device of the present embodiment
Display synchronisation control means in 40 executable aforementioned first embodiments, detection module 41, driver module 43, first judge
The functional modules such as module 45 and the second judgment module 47 can be software module and can be by receiving the programmable logic on card
Device such as FPGA device is realized.
Specifically, detection module 41 is used for detection frame synchronous start point, such as detects the frame synchronization of each frame image
Initial point simultaneously will test result informing driver module 43.
Driver module 43 is swept for starting progress present frame under the triggering of the present frame synchronous start point detected
It retouches to drive target display screen to show current frame image, target display screen herein can be LED display, but the present invention is not
As limit.
First judgment module 45 in present frame scanning process for judging whether a wheel scan is completed.Specifically, such as
One wheel scan of fruit does not complete, then is notified that driver module 43 continues this wheel scan, can if a wheel scan on the contrary is completed
Judging result informing driver module 43 is executed into subsequent judgement operation.
Second judgment module 47 in present frame scanning process after the completion of a wheel scan for judging next frame synchronization
Whether starting point has been detected by.Specifically, informing display driving mould if next frame synchronization starting point is not detected
Block 43 continue the new round in current frame scan scanning, otherwise if next frame synchronization starting point it has been detected that if can will sentence
Disconnected result informs that driver module 43 carries out display data and switches and execute next frame scan to drive target display screen to show
Next frame image.
In addition, can be found in the display synchronously control in aforementioned first embodiment for the function detail of modules 41-47
Step in method executes details, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multichannel unit or component
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multichannel
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of hardware adds SFU software functional unit.
The above-mentioned integrated unit being realized in the form of SFU software functional unit can store and computer-readable deposit at one
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the portion of each embodiment the method for the present invention
Step by step.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, abbreviation
ROM), random access memory (Random Access Memory, abbreviation RAM), magnetic or disk etc. are various can store
The medium of program code.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of display synchronisation control means characterized by comprising
Detection frame synchronous start point；
Start to carry out current frame scan under the triggering of the present frame synchronous start point detected to drive target display screen to show
Current frame image, wherein the scanning mode that the target display screen uses is swept for 1/N and N is the positive integer greater than 1；
Judge whether a wheel scan is completed in present frame scanning process, wherein each wheel scan includes the n times row sequentially carried out
Scanning；
Judge whether next frame synchronization starting point has been detected by after the completion of a wheel scan in present frame scanning process；
If judging next frame synchronization starting point it has been detected that switching display data and to carry out next frame scanning described to drive
Target display screen shows next frame image.
2. display synchronisation control means according to claim 1 characterized by comprising if judging next frame synchronization
Starting point is not detected, and continuation carries out next wheel scan in present frame scanning process.
3. display synchronisation control means according to claim 1 characterized by comprising
If a wheel scan does not complete in present frame scanning process, continue this wheel scan until judging again after the completion described next
Whether frame synchronization starting point has been detected by.
4. display synchronisation control means according to claim 1 characterized by comprising
If a wheel scan does not complete but have detected that next frame synchronization starting point in present frame scanning process, continue this
Wheel scan until judge whether next frame synchronization starting point has been detected by after this wheel scan of completion again.
5. a kind of display screen control system, comprising: send controller, receive card array and LED box；The reception card array connects
It connects between the transmission controller and the LED box；It is characterized in that, at least one of described reception card array receives
Card is configured to:
Detection frame synchronous start point；
Start to carry out current frame scan under the triggering of the present frame synchronous start point detected to drive target display screen to show
Current frame image, wherein the scanning mode that the target display screen uses is swept for 1/N and N is the positive integer greater than 1；
Judge whether a wheel scan is completed in present frame scanning process, wherein each wheel scan includes the n times row sequentially carried out
Scanning；
If judging, next frame synchronization starting point is not detected, and continuation carries out next wheel scan in present frame scanning process；
If judging next frame synchronization starting point it has been detected that switching display data and to carry out next frame scanning described to drive
Target display screen shows next frame image.
6. display screen control system according to claim 5, which is characterized in that at least one described reception card is configured
At: if a wheel scan does not complete but has detected that next frame synchronization starting point in present frame scanning process, continue to
This wheel scan is until complete a wheel scan.
7. display screen control system according to claim 5, which is characterized in that the reception card array includes at least a string
Receiving card and each concatenation receipts card includes the multiple reception cards being concatenated together by cable.
8. a kind of display sync control device characterized by comprising
Detection module is used for detection frame synchronous start point；
Driver module, for starting to carry out current frame scan under the triggering of the present frame synchronous start point detected to drive
Moveing target indication screen shows current frame image；
First judgment module, for judging whether a wheel scan is completed in present frame scanning process；
Second judgment module, for judging next frame synchronization starting point when the wheel scan after the completion of in present frame scanning process
Whether have been detected by；
Wherein, the driver module is also used to: being continued when judging that next frame synchronization starting point is not detected current
Next wheel scan is carried out during frame scan, and the switching display number when judging that next frame synchronization starting point has been detected by
According to and carry out next frame scanning to drive the target display screen to show next frame image.
9. display sync control device according to claim 8, which is characterized in that the driver module is used for:
If a wheel scan does not complete in present frame scanning process, continue this wheel scan.
10. display sync control device according to claim 8, which is characterized in that the driver module is used for:
If a wheel scan does not complete but has detected that next frame synchronization starting point in present frame scanning process, continue this wheel scan
Until completing a wheel scan.
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| CN201710509235.7A CN109147650B (en) | 2017-06-28 | 2017-06-28 | Display synchronization control method and device and display screen control system |
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| CN201710509235.7A CN109147650B (en) | 2017-06-28 | 2017-06-28 | Display synchronization control method and device and display screen control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112530334A (en) * | 2019-09-19 | 2021-03-19 | 联咏科技股份有限公司 | Electronic circuit for driving display panel with touch sensor |
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| Publication number | Publication date |
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| CN109147650B (en) | 2021-01-15 |
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