CN105405393A - LED display screen driving control method and LED display screen driving control device - Google Patents
LED display screen driving control method and LED display screen driving control device Download PDFInfo
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- CN105405393A CN105405393A CN201510893565.1A CN201510893565A CN105405393A CN 105405393 A CN105405393 A CN 105405393A CN 201510893565 A CN201510893565 A CN 201510893565A CN 105405393 A CN105405393 A CN 105405393A
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Abstract
The invention relates to an LED display screen driving control method and an LED display screen driving control device. The above mentioned method comprises the following steps: original image data can be received, and the resolution ratio of the original image data is M*N, and in addition, the M and the N are positive integers; a extracted channel data filling processing and an extracted scanning line data filling processing of the original data can be carried out according to screen configuration parameters, and then the memory addresses of the processed image data mapped in a memorizer can be generated; after data reading processing and output processing according to the memory addresses, the image data can be divided into a plurality of data groups, which can be used to drive and control a target screen synchronously, and in addition, the resolution ratio of the processed data is P*Q, and the P is the positive integer greater than the M, and is the integral multiple of the channel number of the LED driving chip of the target screen, and then the Q is the positive integer greater than the N, and is the integral multiple of the greatest scanning line number of the scanning line numbers of the plurality of data groups. The data filling matching of the extracted channels and the extracted scanning lines of the target screen can be carried out, and then the object of eliminating the afterglow can be achieved.
Description
Technical field
The present invention relates to display technique field, particularly a kind of LED display drived control method and a kind of LED display driving control device.
Background technology
Current LED display is widely used in the multiple occasion in daily life due to features such as its visuality are high and low in energy consumption.According to the difference of its application scenario, the size of LED screen body, shape and cabling mode are varied, the difficulty causing LED display and control is more and more higher, simultaneously in procedure for displaying because the erratic behavior of the cabling of many LED screen body and lighting mode also can cause display screen to occur the twilight sunset phenomenons such as various bright line, bright spot, greatly have impact on the display effect of LED display.General is light interval time by change line feed to carry out twilight sunset process for rule screen body now, this solves the elimination of most of LED display twilight sunset phenomenon, and the Processing for removing of the screen body twilight sunset phenomenon of some special distributions only can not solve by this method completely, also need the process carrying out other, the elimination of guarantee twilight sunset phenomenon, improves display effect.
Control display at present for the screen body of this type of special distribution mainly realizes with the method for data recombination and then the display of control line feed counting, to adopt 16 channels drive chips and to use the screen body of the 13*13 resolution sizes of two groups of data syn-chronization drived control, because its distribution is irregular, first group of data carries out 6 line scanning displays, and second group of data carries out 7 line scanning displays; In data recombination process, first be the view data of 16*13 according to its passage service condition coupling by the view data of original 13*13 according to screen body parameter, shown in Figure 1, black region in invalid passage and Fig. 1, now non-valid channel fills full 0 data, thus achieves the coupling of data channel; Then conventional image packets displacement display is carried out, light in procedure for displaying, current one scan row data are sent into complete and after producing latch signal, lighting operation is carried out during next scan line sends into data, so when second group of data carries out the 7th scan line lighting operation, first group of the 7th scan line need not show, so in fact do not connect LED when row selects signal to choose during the 7th scan line, now this scan line does not send data and does not show, and can be realized normally lighting of the screen body of this type of special distribution by such method.
But, the shortcoming of control method of the prior art is for when second group of data carries out the 7th row lighting operation, and first group of the 7th row should not show, but owing to shielding the structure reason of body, for the 8 screen bodies swept in Fig. 2, one group of data channel can be used for 8 row LED to share, and first group of data of the prior art share for front 6 row, light control signal and effectively light control for full frame, the data so the 7th row ought not connecting LED is not bothered to see me out, when carrying out this row lighting operation, the pathway closure of screen body driving chip, due to LED light after carry out extinguishing electric discharge again and can need the regular hour, now can suppress the discharge process of lastrow LED, lastrow is caused to occur the twilight sunset phenomenons such as bright spot, have impact on the display effect of display screen.
Summary of the invention
Therefore, for overcoming the defect and deficiency that exist in prior art, the present invention proposes a kind of LED display drived control method and a kind of LED display driving control device.
Particularly, a kind of LED display drived control method that the embodiment of the present invention proposes, comprises step: receive raw image data, the resolution sizes of wherein said raw image data is M*N, and M, N are positive integer; Carry out extracting channel according to screen body configuration parameter to described raw image data and extract scan-line data filling process and mapping image data memory address in memory after generating process; And carry out digital independent with view data after exporting described process according to described memory address and be divided into multiple data groups synchronous drived control target screen body, after wherein said process, the resolution sizes of view data is P*Q, P is the integral multiple of port number being greater than the positive integer of M and the LED drive chip for described target screen body, Q be greater than N positive integer and be the integral multiple of the maximum scan line number in the number of scanning lines of described multiple data group.
In one embodiment of the invention, the described memory address of all padding datas after described process in view data except described raw image data points to the same address in described storer.
In one embodiment of the invention, the described memory address of all padding datas after described process in view data except described raw image data points to the different addresses in described storer.
In one embodiment of the invention, each padding data is the arbitrary data between full 0 to complete 1.
In one embodiment of the invention, each padding data 8bit represents.
In addition, a kind of LED display driving control device that the embodiment of the present invention proposes, is applied to a kind of LED display control card of LED display system.Described LED display driving control device comprises: data reception module, and for receiving raw image data, the resolution sizes of wherein said raw image data is M*N, and M, N are positive integer; Data stuffing processing module, fills process and mapping image data memory address in memory after generating process for carrying out extracting channel according to screen body configuration parameter to described raw image data and extracting scan-line data; And display translation module, multiple data groups synchronous drived control target screen body is divided into for carrying out digital independent according to described memory address with view data after exporting described process, after wherein said process, the resolution sizes of view data is P*Q, P is the integral multiple of port number being greater than the positive integer of M and the LED drive chip for described target screen body, Q be greater than N positive integer and be the integral multiple of the maximum scan line number in the number of scanning lines of described multiple data group.
In one embodiment of the invention, in described LED display driving control device, the described memory address of all padding datas after described process in view data except described raw image data points to the same address in described storer.
In one embodiment of the invention, in described LED display driving control device, the described memory address of the extracting channel padding data after described process in view data except described raw image data and the described memory address of extraction scan line padding data point to the different addresses in described storer respectively.
In one embodiment of the invention, in described LED display driving control device, each padding data is the arbitrary data between full 0 to complete 1.
In one embodiment of the invention, described LED display control card is the receiving card connecting described target screen body.
As from the foregoing, the embodiment of the present invention by target screen style as the extracting channel of the screen body of irregular distribution and extract scan line carry out data stuffing coupling, while ensure that data correctness, effectively prevent the appearance of interfering data, thus achieve the object eliminating twilight sunset phenomenon, improve display effect.
By the detailed description below with reference to accompanying drawing, other side of the present invention and feature become obvious.But it should be known that this accompanying drawing is only the object design of explanation, instead of as the restriction of scope of the present invention.Should also be appreciated that, unless otherwise noted, unnecessaryly draw accompanying drawing to scale, they only try hard to structure described herein and flow process are described conceptually.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Fig. 1 is a kind of data stuffing handling principle schematic diagram of the prior art.
Fig. 2 is of the prior art a kind of 8 structural representations sweeping screen body.
Fig. 3 is a kind of extracting channel of the embodiment of the present invention and extracts scan-line data filling handling principle schematic diagram.
Fig. 4 is the sequential chart of the synchronous drived control of a kind of multiple data groups of the embodiment of the present invention.
Fig. 5 is the module diagram of a kind of LED display driving control device of the embodiment of the present invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
In LED display system, twilight sunset phenomenon can badly influence the display effect of LED display, greatly reduce the experience of user, the following embodiment of the present invention proposes a kind of LED display drived control method, it carries out data stuffing coupling to extracting channel and extraction scan line to reach the object eliminating twilight sunset, thus improve the display effect of LED display.
Particularly, the LED display drived control method that the embodiment of the present invention proposes, such as, be executed in the LED display control card such as receiving card of LED display system, comprise step:
I) raw image data is received;
Ii) according to screen body configuration parameter extracting channel carried out to described raw image data and extract scan-line data and fill process and mapping image data memory address in memory after generating process; And
Iii) carry out digital independent according to described memory address and be divided into multiple data groups synchronous drived control target screen body with view data after exporting described process, such as image data shift after process is outputted to LED display and latches view data, enters a new line, lights the normal display realizing LED display, eliminate with the twilight sunset that this realizes LED display, improve the display quality of LED display system.
For ease of understanding the present invention, below to adopt 16 channels drive chips and to use the screen body of the 13*13 resolution sizes of two groups of data syn-chronization drived control to be described in detail:
For eliminating the twilight sunset phenomenon that classic method produces, the preliminary work of needs is the screen body configuration parameters obtaining LED display, and shield body configuration parameter can by carrying out test acquisition to LED display.Specifically can be:
After the program of joining screen software SmartLCT in the intelligence of joining the such as Xi'an Novastar Electronic Technology Co., Ltd.'s exploitation of screen software enters test pattern, the first step needs the essential information of filling in LED display, as module chip information (comprises chip data type, chip title etc.), module information (comprises screen body resolution, row decoding mode, data group number, data group band carries size etc.), the information such as cascade direction; Second step first exports a width test pattern, by judging OE (showing enable) polarity with or without display, can skip second step for what determine OE polarity; 3rd step opens first group of data channel output red, green, blue image respectively, even virtual red or black image, is arranged to determine that Data Color exports by the color display of correspondence screen body lamp plate; 4th step is opened first group of data channel and is exported complete white picture, the number of scanning lines of first group of data tape carrier is judged by screen body lamp plate display line number, thus determine that two groups of data respectively carry the number of scanning lines of carrying, then open first group of data channel and export first number of scanning lines complete white picture according to the show, judged the band loading point number of screen body lamp plate first group of data first scan line by display columns; 5th step can generate the cabling table of a corresponding size of counting according to parameter above, then program the point output of a point can carry out described point display, now judge that the driving chip passage of screen body exports situation and cabling table according to described point information, after completing this step, just can obtain the screen body configuration parameter that LED display is corresponding.Wherein, the position extracting scan line determines that mode is: the band obtaining each data group carries line number information, namely after the number of scanning lines that each data group band carries, if two groups of unmatched words of data scanning line number, be configured as screen swept-volume line number using maximum scan line number in two data groups when cabling table described point, after having configured, making a call to a horizontal line of lining by line scan by test pictures, can judge which is the scan line (be also extract scan line) be extracted by observing not show at which horizontal line; Such as, show in Fig. 3 and extract scanning behavior the 7th scan line, in practical application, according to LED point any one scan line that can extract in front 7 row different from the annexation of the output pin of row decoding chip.
And the position of extracting channel determines that mode is: when carrying out cabling table and drawing, program can produce the picture of pointwise display, now can show situation by screen body lamp plate and judge which passage of LED drive chip can normally show, which passage is extracted and does not show, and is also extracting channel.
Hold above-mentioned, get comprise LED drive chip port number, extracting channel position, data group the number of scanning lines and extract the information such as scan line position screen body configuration parameter after, screen body configuration parameter can be prestored in the storer on LED display control card, then by LED display control card for raw image data to extracting channel with extract scan line and carry out data stuffing process and view data after output processing is divided into two synchronous drived control LED display of data group carries out display and eliminate to realize twilight sunset.Particularly,
According to screen body configuration parameter, the raw image data of 13*13 resolution sizes is carried out filling to expand, raw image data stores in memory, with the port number of LED drive chip (such as 16) integral multiple and the maximum data group number of scanning lines (such as 7) for reference information carries out Data Matching, so raw image data 13*13 is filled the view data expanded and be treated to 16*14 in this citing, Figure 3 shows that example, the memory address mapped in memory is generated to view data after process simultaneously, wherein extracting channel (or claim non-valid channel, do not use passage) and the data area (i.e. black region in Fig. 3) of extracting scan line arbitrary data between corresponding filling full 0 data to complete 1 can be carried out (typically according to screen body structure, the R of full-color LED display screen, G, B data represent with 8bit respectively, the scope of the arbitrary data between corresponding full 0 data to complete 1 is [0, 255]), when concrete methods of realizing is for reading view data, when determining memory address and being Fig. 3 filled black regional address, corresponding data read address can be modified and be directed to one piece of independent data block, this data block can store the arbitrary disposition data between full 0 to complete 1, therefore can realize the view data that filled black regional address reads is this configuration data, number of scans now with regard to the Data Matching and multiple data group that have achieved data channel is synchronous, next the displacement carrying out view data sends and lights control, owing to have matched the view data of the first data group the 7th row, so when carrying out lighting display, only need to carry out corresponding display and control, corresponding sequential as shown in Figure 4, do so just achieve two data groups carry out simultaneously the 7th row light time, first group latched the configuration data pre-set, when data channel is opened, owing to being the configuration data according to the corresponding setting of screen body structure, example is configured to Fig. 2 institute display screen body, now configuration data is such as set to complete 1 data, passage understands output low level after opening, so the discharge process of LED point in respective channel can not be disturbed, the effect eliminating twilight sunset phenomenon is reached with this.
Moreover, for the memory address of all padding datas (also i.e. the extracting channel of black region and view data corresponding to extraction scan line in Fig. 3) after process in view data except raw image data except, in order to save the storage space of storer, it all can point to the same address in storer, in this case, all padding datas are identical data; Certainly, the memory address of extracting channel padding data and the memory address of extraction scan line padding data also can point to the different addresses of storer respectively, in this case, each extracting channel padding data is identical data, and each extracts scan line padding data is also identical data; Even, the memory address of each padding data points to the different addresses of storer respectively, just like this accounts for memory-aided storage space relatively large, but still is a kind of feasible mode.
See Fig. 5, its a kind of LED display driving control device proposed for the embodiment of the present invention, it is suitable for the LED display control card such as receiving card (it connects LED screen body) being applied to a kind of LED display system.Particularly, the LED display driving control device of the present embodiment is such as realized by the software of the programming device (such as FPGA) running on receiving card, it comprises: data reception module 51, data stuffing processing module 53 and display translation module 55.
Wherein, data reception module 51 is for receiving raw image data, and the resolution sizes of wherein said raw image data is M*N, and M, N are positive integer.Data stuffing processing module 53 fills process and mapping image data memory address in memory after generating process for carrying out extracting channel according to screen body configuration parameter to described raw image data and extracting scan-line data.Display translation module 55 is divided into multiple data groups synchronous drived control target screen body for carrying out digital independent according to described memory address with view data after exporting described process, after wherein said process, the resolution sizes of view data is P*Q, P is the integral multiple of port number being greater than the positive integer of M and the LED drive chip for described target screen body, Q be greater than N positive integer and be the integral multiple of the maximum scan line number in the number of scanning lines of described multiple data group.
As for data reception module 51, the concrete function details of the modules such as data stuffing processing module 53 and display translation module 55 with reference to the aforementioned explanation being relevant to LED display drived control method, can not repeat them here.
In sum, the embodiment of the present invention by target screen style as the extracting channel of the screen body of irregular distribution and extract scan line carry out data stuffing coupling, while ensure that data correctness, effectively prevent the appearance of interfering data, thus achieve the object eliminating twilight sunset phenomenon, improve display effect.Extracting channel and extract scan line and carry out data stuffing coupling, while ensure that data correctness, effectively prevent the appearance of interfering data, thus achieve the object eliminating twilight sunset phenomenon, improve display effect.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solution of the present invention content, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. a LED display drived control method, is characterized in that, comprises step:
Receive raw image data, the resolution sizes of wherein said raw image data is M*N, and M, N are positive integer;
Carry out extracting channel according to screen body configuration parameter to described raw image data and extract scan-line data filling process and mapping image data memory address in memory after generating process; And
Carry out digital independent with view data after exporting described process according to described memory address and be divided into multiple data groups synchronous drived control target screen body, after wherein said process, the resolution sizes of view data is P*Q, P is the integral multiple of port number being greater than the positive integer of M and the LED drive chip for described target screen body, Q be greater than N positive integer and be the integral multiple of the maximum scan line number in the number of scanning lines of described multiple data group.
2. LED display drived control method as claimed in claim 1, it is characterized in that, the described memory address of all padding datas after described process in view data except described raw image data points to the same address in described storer.
3. LED display drived control method as claimed in claim 1, it is characterized in that, the described memory address of all padding datas after described process in view data except described raw image data points to the different addresses in described storer.
4. LED display drived control method as claimed in claim 2 or claim 3, is characterized in that, each padding data is the arbitrary data between full 0 to complete 1.
5. LED display drived control method as claimed in claim 4, it is characterized in that, each padding data 8bit represents.
6. a LED display driving control device, is applied to a kind of LED display control card of LED display system, it is characterized in that, described LED display driving control device comprises:
Data reception module, for receiving raw image data, the resolution sizes of wherein said raw image data is M*N, and M, N are positive integer;
Data stuffing processing module, fills process and mapping image data memory address in memory after generating process for carrying out extracting channel according to screen body configuration parameter to described raw image data and extracting scan-line data; And
Display translation module, multiple data groups synchronous drived control target screen body is divided into for carrying out digital independent according to described memory address with view data after exporting described process, after wherein said process, the resolution sizes of view data is P*Q, P is the integral multiple of port number being greater than the positive integer of M and the LED drive chip for described target screen body, Q be greater than N positive integer and be the integral multiple of the maximum scan line number in the number of scanning lines of described multiple data group.
7. LED display driving control device as claimed in claim 6, it is characterized in that, the described memory address of all padding datas after described process in view data except described raw image data points to the same address in described storer.
8. LED display driving control device as claimed in claim 6, it is characterized in that, the described memory address of the extracting channel padding data after described process in view data except described raw image data and the described memory address of extraction scan line padding data point to the different addresses in described storer respectively.
9. LED display driving control device as claimed in claim 7 or 8, is characterized in that, each padding data is the arbitrary data between full 0 to complete 1.
10. LED display driving control device as claimed in claim 6, it is characterized in that, described LED display control card is the receiving card connecting described target screen body.
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| WO2019214364A1 (en) * | 2018-05-07 | 2019-11-14 | 京东方科技集团股份有限公司 | Driving control method and device, and display device |
| CN112394278A (en) * | 2020-11-06 | 2021-02-23 | 深圳Tcl数字技术有限公司 | Lamp panel wiring information generation method, test terminal and readable storage medium |
| CN113948037A (en) * | 2020-10-19 | 2022-01-18 | 深圳匠明科技有限公司 | Data processing method, device and system, LED driving chip and controller |
| CN114783366A (en) * | 2022-04-29 | 2022-07-22 | 卡莱特云科技股份有限公司 | Display method and device based on special-shaped module and LED display screen |
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| CN112394278A (en) * | 2020-11-06 | 2021-02-23 | 深圳Tcl数字技术有限公司 | Lamp panel wiring information generation method, test terminal and readable storage medium |
| CN114783366A (en) * | 2022-04-29 | 2022-07-22 | 卡莱特云科技股份有限公司 | Display method and device based on special-shaped module and LED display screen |
| CN114783366B (en) * | 2022-04-29 | 2023-11-28 | 卡莱特云科技股份有限公司 | Display method and device based on special-shaped module and LED display screen |
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