CN103400549A - LED pixel correction coefficient uploading method of LED display screen - Google Patents
LED pixel correction coefficient uploading method of LED display screen Download PDFInfo
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Abstract
The invention relates to an LED pixel correction coefficient uploading method of an LED display screen, which comprises the following steps: converting a plurality of LED pixel correction coefficients of the LED display screen into a plurality of correction image data, wherein each LED pixel correction coefficient comprises a plurality of correction information, and each correction image data comprise one or a plurality of correction information of part or all of the LED pixel correction coefficients; conveying the correction image data to a video interface, electrically connected with the LED display screen, of the control system of the LED display screen, and analyzing the LED pixel correction coefficients of the LED display screen from the correction image data through the LED display screen control system for saving. The method has the advantages that correction coefficients are converted into correction image data, and the correction image data are uploaded through the video interface, so that the uploading speed of the correction coefficients is increased.
Description
Right of priority
Patented claim of the present invention require the applying date be September 29, application number in 2012 be 201210375969.8 and denomination of invention be the domestic priority in first to file of " video interface commonly used is uploaded the method for LED display correction coefficient ", should be in all the elements of first to file in this as reference.
Technical field
The present invention relates to LED display and proofread and correct field, particularly a kind of LED pixel correction coefficient method for uploading of LED display.
Background technology
The LED display point-to-point correction system, coordinated and completed by " control system " and " point-to-point correction system " two systems, and wherein point-to-point correction system is responsible for " generation correction coefficient ", and control system is responsible for " application correction coefficient ".Corrective system, to the LED display imaging, is obtained brightness and the color of each LED lamp by mm professional camera special, for each pixel, generates correction coefficient, then correction coefficient is given control system and preserves.Control system when operation,, for the picture material of each pixel, is completed multiplying at a high speed with correction coefficient, thereby is completed pointwise correction.
The pointwise correction technology has successively experienced gamma correction and two stages of chromaticity correction.
One, the ultimate principle of brightness point by point correction
LED display is comprised of the LED pel array, each LED pixel generally includes the red, green, blue three-primary color LED, the bright of LED is secretly to be controlled by the pulsewidth of control system, and the red, green and blue LED of different brightness has been combined into our needed various brightness and color.
, if on a LED display, all LED only have luminance difference (this is ideal situation), proofread and correct and can solve by brightness point by point so.After setting brightness target value,, for the LED of brightness higher than desired value, by its control pulsewidth of suitable compression, can reduce its brightness, reach desired value; Thereby make LED display obtain reasonable brightness uniformity.
Unfortunately, each LEDs not only exists the inconsistency of brightness, also exists the inconsistency of color (wavelength), and by pulse-width regulated brightness, can't adjust its color, and this just can only solve by pointwise chromaticity correction technology.
Two, the ultimate principle of pointwise chromaticity correction
The pointwise chromaticity correction, based on the ultimate principle of colourity compensation, compensates this kind primary colours by other two kinds of primary colours, thereby realizes the adjusting of color by colour mixture.Give an example, if in the time of the red LED of certain LED pixel too red (that is to say that wavelength is oversize), when we can allow the red LED of this LED pixel bright, allow originally should not be bright green LED and blue LED all be with a bit and light (what are bright for concrete green LED and blue LED band, are by image acquisition, image recognition, image is processed and computing draws result).Like this, after colour mixture, human eye just feels that this red LED is just so not red.
That is to say, for each LED pixel that is formed by the red, green, blue three-primary color LED, according to its brightness and colourity, can calculate the matrix of coefficients of 3 * 3, when showing image, this matrix multiplies each other with the view data that needs to show, just can complete colourity and gamma correction.
R
out＝a
11*R
in+a
21+G
in+a
31*B
in
While it should be noted that the pointwise chromaticity correction, in by other two kinds of primary colours, compensating the process of this kind primary colours,, except adjusting by colour mixture its color, virtually also covered a part of brightness.So during the pointwise chromaticity correction, the loss of brightness is proofreaied and correct and is wanted little much with respect to brightness point by point.
Here the pointwise chromaticity correction of our indication is that YC is proofreaied and correct together, and we are referred to as the pointwise chromaticity correction traditionally.By introduction and the analysis of above-mentioned ultimate principle, the advantage that the pointwise chromaticity correction is proofreaied and correct with respect to brightness point by point is as follows:
1. the pointwise chromaticity correction can be obtained higher light tone degree homogeneity (brightness point by point is proofreaied and correct can't solve colourity heterogeneity problem);
2. the pointwise chromaticity correction can obtain less brightness sacrifice.For general LED display, brightness point by point is proofreaied and correct approximately needs to sacrifice 15%～20% brightness, and the pointwise chromaticity correction only needs to sacrifice 5%～8% brightness.This has used for many years for those, and it is particularly crucial that the LED display that brightness has decayed lowlyer, this advantage seem.
All there is following problem in existing two kinds of bearing calibrations:
(1) the existing method of uploading correction coefficient is all to carry out data upload by command channels such as RS232 serial ports, USB interface or network interfaces, the time of uploading correction coefficient is directly proportional to the pixel quantity of LED display, pixel is more, uploads the needed time of correction coefficient longer.For example the correction coefficient of the total 24M Byte of the LED display of 1024*768 pixel, upload correction coefficient by the RS232 serial ports with 115200bit/s, and the theoretical time that needs is about 0.485 hour, and time used even may surpass half an hour., if calibration result is dissatisfied, so also to repeatedly proofread and correct and repeatedly upload correction coefficient.The speed that correction coefficient is uploaded is too slow, has had a strong impact on the progress of proofreading and correct LED display, has wasted a large amount of time.
(2) in addition, the existing correction factor method of uploading is when uploading correction coefficient, need calculate the memory location of correction coefficient in hardware memory of each LED pixel, could correctly upload correction coefficient, in case the memory location mistake of calculating, the LED display effect after correction may be also poorer than uncorrected.And for irregular LED display, the memory location of correction coefficient in hardware memory that calculate each LED pixel is more complicated and difficulty, can strengthen the complexity of software algorithm.
Summary of the invention
, for overcoming problems of the prior art, the invention provides a kind of LED pixel correction coefficient method for uploading of LED display.
Particularly, the invention provides following technical scheme:
A kind of LED pixel correction coefficient of LED display, wherein the single led pixel of LED display comprises the LED of multiple different colours, described LED pixel correction coefficient method for uploading comprises step: (a) convert the correction coefficient of a plurality of LED pixels of LED display to several image correcting data, wherein the correction coefficient of each LED pixel comprises a plurality of control informations, and every width image correcting data comprises the one or more control informations in the correction coefficient of the some or all of LED pixel in described a plurality of LED pixel; And, (b) to described several image correcting datas of video interface transmission of the LED display control system that is electrically connected to LED display, with the correction coefficient that is parsed described a plurality of LED pixels of LED display by the LED display control system from described several image correcting datas, store.
In a technical scheme of the present invention, the LED display control system comprises Video Controller and the control panel that is connected described Video Controller and LED display, correspondingly, above-mentioned steps (b) comprising: the video interface to described Video Controller transmits described several image correcting datas, by described Video Controller, described several image correcting datas are sent to described control panel, the correction coefficient that parses described a plurality of LED pixels of described LED display for described control panel from described several image correcting datas is stored.
In another technical scheme of the present invention, the LED display control system comprises Video Controller and the control panel that is connected described Video Controller and LED display, correspondingly, above-mentioned steps (b) comprising: the video interface to described Video Controller transmits described several image correcting datas, to be parsed the correction coefficient of described a plurality of LED pixels of described LED display from described several image correcting datas by described Video Controller, more described correction coefficient is offered described control panel store.
In a technical scheme of the present invention, above-mentioned Video Controller also further informs that by serial ports, network interface or USB interface control panel transmits the opportunity of described several image correcting datas.
In a technical scheme of the present invention, above-mentioned LED pixel correction coefficient method for uploading also comprises step: add respectively flag in described several image correcting datas, to identify it as image correcting data.
In a technical scheme of the present invention, the correction coefficient matrix of the correction coefficient of above-mentioned each LED pixel for by described a plurality of control informations, being formed.
In a technical scheme of the present invention, a plurality of control informations that above-mentioned same width image correcting data comprises are respectively the control information of same position of the correction coefficient matrix of each the LED pixel in described a plurality of LED pixel.
In a technical scheme of the present invention, above-mentioned video interface is selected from the group that comprises DVI interface, HDMI interface, SDI interface and DP interface.
In a technical scheme of the present invention, often convert a width image correcting data, namely the video interface to described LED display control system transmits this width image correcting data; After perhaps converting described several image correcting datas, then to the video interface of described LED display control system, transmit one by one described several image correcting datas.
In a technical scheme of the present invention, the correction coefficient of above-mentioned each LED pixel is brightness and/or the chromaticity correction coefficient of this LED pixel.
As from the foregoing, the present invention converts image correcting data to by the correction coefficient with the LED pixel, then via video interface, uploads; Owing to adopting video interface to upload correction coefficient, transmission speed is all faster by command channels such as RS232 serial ports, USB interface or network interfaces than prior art, has promoted the correction coefficient uploading speed.In addition, when when by video interface, uploading correction coefficient, if the control information that same width image correcting data comprises is respectively the control information of same position of the correction coefficient matrix of each the LED pixel in described a plurality of LED pixel, also namely carry out point-to-point image data transmission, can avoid irregular display screen to need the problem of the position of calculation correction coefficient in storer at uploading data, simplify software algorithm.
By the detailed description below with reference to accompanying drawing, it is obvious that other side of the present invention and feature become.But should be known in the only purpose design for explaining of this accompanying drawing, rather than as the restriction of scope of the present invention, this is because it should be with reference to additional claim.Should also be appreciated that, unless otherwise noted, the unnecessary accompanying drawing of drawing to scale, they only try hard to illustrate conceptually structure described herein and flow process.
Description of drawings
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Fig. 1 is the LED pixel correction coefficient method for uploading process flow diagram of the LED display of the embodiment of the present invention.
Fig. 2 is the adoptable hardware structure of LED pixel correction coefficient method for uploading shown in Figure 1.
Embodiment
, for above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
At first, correction coefficient is described as follows: for LED display by R, G, the single led pixel that the B three-primary color LED forms, its correction coefficient is generally a correction coefficient matrix, comprise a plurality of control informations, 3 * 3 matrixes (as follows) that for example nine control informations of a11-a33, consist of, wherein be in three control information a11 on diagonal line, a22, a22 represents the gamma correction information of single led pixel, and other six control informations are chromaticity correction information.Therefore, the correction coefficient that only comprises gamma correction information can be referred to as brightness correction coefficients usually, and the correction coefficient that comprises gamma correction information and chromaticity correction information can be referred to as light tone degree correction coefficient.
Correspondingly, when the LED pixel is carried out the image demonstration, the input image data (R of the correction coefficient matrix of this LED pixel and this LED pixel
in,G
in,B
in) multiply each other to obtain red (R) in the LED pixel, green (G), the view data (R of the actual displayed of blue (B) LED lamp
Out,G
Out,B
out).
R
out＝a
1l*R
in+a
21*G
in+a
31*B
in
G
out＝a
12*R
in+a
22*G
in+a
32*B
in
B
out＝a
13*R
in+a
23*G
in+a
33*B
in
Be understandable that, the actual needs according to proofreading and correct, can change the control information arrangement mode in correction coefficient, is for example 1 * 9 correction coefficient matrix; Also can change the quantity of the control information in correction coefficient, for example for consist of the LED display of single led pixel four look LED, its correction coefficient for example can adopt the correction coefficient matrix of 4 * 4.In brief, control information quantity and the arrangement mode in correction coefficient decided by practical application request.
Next describe in connection with Fig. 1 the LED pixel correction coefficient method for uploading that is relevant to LED display of the present invention in detail.Wherein, Fig. 1 is the LED pixel correction coefficient method for uploading process flow diagram of the LED display of the embodiment of the present invention, and Fig. 2 is the adoptable hardware structure of LED pixel correction coefficient method for uploading shown in Figure 1.
As shown in Figures 1 and 2, the LED pixel correction coefficient method for uploading of the LED display in the present embodiment comprises step S110 and S130.
In step S110, convert the correction coefficient of a plurality of LED pixels of LED display 200 to several image correcting data, wherein the correction coefficient of each LED pixel comprises a plurality of control informations, and every width image correcting data comprises the one or more control informations in the correction coefficient of the some or all of LED pixel in described a plurality of LED pixel.
Particularly, referring to Fig. 2, LED display 200 is connected to host computer 400 by LED display control system 300; The control panel (also claiming receiving card) 330 that LED display control system 300 comprises Video Controller 310 and with Video Controller 310, is electrically connected to, can pass through serial ports (for example RS232, RS485), USB interface or network interface between control panel and Video Controller 300 communicates; Control panel 330 further is electrically connected to LED display 200 and shows with the LED casing of controlling composition LED display 200.The quantity of control panel 330 can be for one or more, and concrete quantity depends on the LED casing quantity that forms LED display 200, and generally speaking, a LED casing can configure a control panel.Video Controller 300 is connected with host computer 400 by video interface.At this, video interface is for example DVI interface (Digital Visual Interface, digital visual interface), HDMI interface (High-Definition Media Interface, the high definition media interface), SDI interface (Serial Digital Interface, but the present invention is not as limit digital serial interface) or DP (DisplayPort) interface; Host computer 400 is for example personal computer, and its correction coefficient with a plurality of LED pixels of LED display 200 converts several image correcting datas to.All LED pixels that a plurality of LED pixels herein can be whole LED display 200, it can be the LED pixel that the single or multiple LED casings of LED display 200 comprise, can be the LED pixel that the single or multiple lamp plates of LED display 200 comprise, or be the LED pixel that the appointed area of LED display 200 comprises.
In the present embodiment, convert the mode of several image correcting datas to for correction coefficient, can adopt following listed mode:
for the single width image correcting data, its control information that comprises is for example that the control information by the same position in the correction coefficient of each the LED pixel in described a plurality of LED pixels forms, take correction coefficient as 3 * 3 correction coefficient matrixs as example, the first width image correcting data consists of the control information a11 in the correction coefficient of each LED pixel, the second width image correcting data consists of the control information a12 in the correction coefficient of each LED pixel, the 3rd width image correcting data consists of the control information a13 in the correction coefficient of each LED pixel, the rest may be inferred.The LED pixel that the control card that comprises due to the control information that comprises in image correcting data and LED display 200 is controlled is one to one, this point-to-point image data transmission, avoided LED display, especially irregular LED display needs the problem of the position of calculation correction coefficient in storer when uploading correction coefficient, simplified software algorithm.
Certainly, the control information in correction coefficient follows the example of not necessarily a described above
11, a
12, a
13, a
21, a
22, a
23, a
31, a
32, a
33Can be also that other are followed the example of, be for example a
33, a
32, a
31, a
23, a
22, a
21, a
13, a
12, a
11Or a
11, a
21, a
31, a
12, a
22, a
32, a
13, a
23, a
33Or be a
11, a
22, a
33, a
21, a
32, a
31, a
12, a
23, a
13Or even other follow the example of, as long as the control panel of LED display 200 can be identified the control information of each LED pixel of extracting, are which control information that belongs in correction coefficient.
those skilled in the art it will also be appreciated that, the single control information that the single width image correcting data also can be not limited to only to comprise the same position in the correction coefficient of each the LED pixel in described a plurality of LED pixel forms, a plurality of control informations that can be also the same position in the correction coefficient of each LED pixel form, for example the first width image correcting data is by the control information a11 in the correction coefficient of each LED pixel, a21, a31 forms, the second width image correcting data is by the control information a12 in the correction coefficient of each LED pixel, a22, a32 forms, the 3rd width image correcting data is by the control information a13 in the correction coefficient of each LED pixel, a23, a33 forms.Even, the single width image correcting data can only comprise the one or more control informations in part LED pixel in described a plurality of LED pixel, for example the first width image correcting data consists of all control informations in part LED pixel, and the second width image correcting data consists of all control informations in other a part of LED pixel.These suitably change, and all should belong to the present invention and correction coefficient be converted to the mentality of designing of image correcting data.
Next, in step S130, video interface to the LED display control system 300 that is electrically connected to LED display 200 transmits above-mentioned several image correcting datas, with the correction coefficient that is parsed described a plurality of LED pixels of LED display 200 by LED display control system 300 from described several image correcting datas, stores.For the LED display control system 300 that comprises Video Controller 310 and control panel 330, the correction coefficient who parses described a plurality of LED pixels of LED display 200 can have two kinds of implementations: as described in following [implementation one] and [implementation two].
[implementation one]: the relation between the transmission in the conversion in above-mentioned steps S110 and step S130 can be: (a) host computer 400 often converts a width image correcting data, and namely the video interface to the Video Controller 300 that is electrically connected to LED display 200 transmits this width image correcting data; (b) after host computer 400 converts described several image correcting datas, then to the video interface of the Video Controller 300 that is electrically connected to LED display 200, transmit one by one described several image correcting datas.
In addition,, because correction coefficient in the embodiment of the present invention is that form with view data transmits, therefore need to inform which view data of control panel of LED display 200 is image correcting datas, concrete informing mode can be following listed:
(1) host computer 400 adds flag in every width image correcting data, identifies it and is image correcting data, and so the control panel of LED display 200 can learn whether the view data that receives is image correcting data; Can also comprise the positional information of each control information in correction coefficient in this flag; Be understandable that in addition, when host computer 400 also can, according to converting correction coefficient to image correcting data with the conversion regime of the control panel agreement of LED display 200 in advance, need not to tell the positional information of the control information in image correcting data again;
(2) host computer 400 does not add flag in image correcting data, but tell Video Controller 300 its transmit the opportunity of image correcting datas, to be transmitted again the control panel of passing on to LED display 200 opportunity of image correcting data by Video Controller 300, for example can just notify the control panel of Video Controller 300 with the LED display 200 of passing on when transmission the first width image correcting data, ensuing N (N is natural number) width view data is all image correcting data; Also can notify Video Controller 300 when transmission M (M is natural number) width image correcting data is M width image correcting datas with the current view data of control panel of the LED display 200 of passing on; Also can be after N width image correcting data be transmitted, notice Video Controller 300 is with the control panel of the LED display 200 of passing on, and front N width view data is image correcting data.At this, the mode of passing on can be passed through serial ports, and USB or network interface communication realize.
In addition, the control panel of LED display 200 is resolved the control information in image correcting data and in the mode of the correction coefficient that builds each LED pixel can is: control panel often receives a width image correcting data, namely extracts the control information in this image correcting data; Can be also after control panel receives all image correcting datas, then extract in the lump the control information in each width image correcting data.
Moreover, because the correction coefficient in the embodiment of the present invention is to upload with the image correcting data form, therefore when the control panel of LED display 200 receives each width image correcting data, can also further according to each width image correcting data, control LED display 200 and show a plurality of correction pictures that represent respectively each width image correcting data.Certainly, also can make LED display 200 not show described a plurality of correction picture
[implementation two]: roughly the same with above-mentioned [implementation one], difference is: above-mentioned [implementation one] is to parse correction coefficient and storage by control panel 330, [implementation two] is to parse correction coefficient with Video Controller 310, then the correction coefficient that will parse provides to control panel 330 and stores.
So far, can complete the uploading fast of correction coefficient of a plurality of LED pixels of LED display 200, the time is used in saving technique personnel's correction greatly.
In addition, it is worth mentioning that, when all LED pixels that a plurality of LED pixels of above-mentioned LED display 200 are whole LED display, it is for example corresponding full frame correction; When LED pixel that appointed area that a plurality of LED pixels of above-mentioned LED display 200 are LED display 200 or single or multiple LED casing comprise, it is for example that corresponding Subarea calibration or casing are proofreaied and correct; When a plurality of LED pixels of above-mentioned LED display 200 are the LED pixel that single or multiple lamp plates comprise, it is for example that corresponding lamp plate is proofreaied and correct.as everyone knows, LED display is normally formed by a plurality of LED box body splicings, each LED casing can comprise one or more lamp plates, each LED casing can dispose a control panel whether lighting with the LED pixel controlling the LED casing and comprised, full frame correction herein refers to the LED pixel of whole LED display and synchronously proofreaies and correct, Subarea calibration is for example only the LED pixel of part LED casing to be proofreaied and correct, casing is proofreaied and correct and is referred to the LED pixel of single casing is proofreaied and correct, lamp plate is proofreaied and correct and is referred to only for the LED pixel of the one or more lamp plates in casing, proofread and correct.
In addition, be understandable that, the LED pixel correction coefficient method for uploading of the LED display in the above embodiment of the present invention is not limited to hardware structure shown in Figure 2, is also synchronous broadcast and control LED display system, and it also can be applicable to asynchronous Broadcast Control LED display system.Generally include LED display and the LED display control system that comprises Video Controller and receiving card for asynchronous Broadcast Control LED display system; Wherein Video Controller also claims Asynchronism Card, and it is integrated with the media play function of host computer, therefore need not host computer to be set again as media playing apparatus.Therefore, when the LED of embodiment of the present invention pixel correction coefficient method for uploading is applied to asynchronous Broadcast Control LED display system, correction coefficient to the conversion of image correcting data is to complete in Video Controller, and image correcting data is to be transmitted to control panel (receiving card) by network interface again after transmitting on the video interface of Video Controller inside, as for providing to the mode of Video Controller of correction coefficient, can realize by SD card or the mmc card interface of Video Controller (Asynchronism Card).
Applied specific case herein principle and the embodiment of the LED pixel correction coefficient method for uploading of LED display of the present invention are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention; all will change in specific embodiments and applications; in sum, this description should not be construed as limitation of the present invention, and protection scope of the present invention should be as the criterion with appended claim.
Claims (10)
1. the LED pixel correction coefficient method for uploading of a LED display, the single led pixel of described LED display comprises the LED of multiple different colours, it is characterized in that, described LED pixel correction coefficient method for uploading comprises step:
Convert the correction coefficient of a plurality of LED pixels of described LED display to several image correcting data, wherein the correction coefficient of each LED pixel comprises a plurality of control informations, and every width image correcting data comprises the one or more control informations in the correction coefficient of the some or all of LED pixel in described a plurality of LED pixel; And
Video interface to the LED display control system that is electrically connected to described LED display transmits described several image correcting datas, with the correction coefficient that is parsed described a plurality of LED pixels of described LED display by described LED display control system from described several image correcting datas, stores.
2. LED pixel correction coefficient method for uploading as claimed in claim 1, it is characterized in that, described LED display control system comprises Video Controller and the control panel that is connected described Video Controller and LED display, correspondingly, video interface to the LED display control system that is electrically connected to described LED display transmits described several image correcting datas, and the step of with the correction coefficient that is parsed described a plurality of LED pixels of described LED display by described LED display control system from described several image correcting datas, storing comprises:
Video interface to described Video Controller transmits described several image correcting datas, by described Video Controller, described several image correcting datas are sent to described control panel, the correction coefficient that parses described a plurality of LED pixels of described LED display for described control panel from described several image correcting datas is stored.
3. LED pixel correction coefficient method for uploading as claimed in claim 1, it is characterized in that, described LED display control system comprises Video Controller and the control panel that is connected described Video Controller and LED display, correspondingly, video interface to the LED display control system that is electrically connected to described LED display transmits described several image correcting datas, and the step of with the correction coefficient that is parsed described a plurality of LED pixels of described LED display by described LED display control system from described several image correcting datas, storing comprises:
Video interface to described Video Controller transmits described several image correcting datas, to be parsed the correction coefficient of described a plurality of LED pixels of described LED display from described several image correcting datas by described Video Controller, more described correction coefficient is offered described control panel store.
4. LED pixel correction coefficient method for uploading as claimed in claim 2, is characterized in that, described Video Controller also further informs that by serial ports, network interface or USB interface described control panel transmits the opportunity of described several image correcting datas.
5. LED pixel correction coefficient method for uploading as claimed in claim 1 or 2, is characterized in that, also comprises step: add respectively flag in described several image correcting datas, to identify it as image correcting data.
6. LED pixel correction coefficient method for uploading as claimed in claim 1, is characterized in that, the correction coefficient matrix of the correction coefficient of described each LED pixel for described a plurality of control informations, consisting of.
7. LED pixel correction coefficient method for uploading as claimed in claim 6, it is characterized in that, a plurality of control informations that same described image correcting data comprises are respectively the control information of same position of the correction coefficient matrix of each the LED pixel in described a plurality of LED pixel.
8. LED pixel correction coefficient method for uploading as claimed in claim 1, is characterized in that, described video interface is selected from the group that comprises DVI interface, HDMI interface, SDI interface and DP interface.
9. LED pixel correction coefficient method for uploading as claimed in claim 1, is characterized in that, often converts a width image correcting data, and namely the video interface to described LED display control system transmits this width image correcting data; After perhaps converting described several image correcting datas, then to the video interface of described LED display control system, transmit one by one described several image correcting datas.
10. LED pixel correction coefficient method for uploading as claimed in claim 1, is characterized in that, the correction coefficient of each LED pixel is brightness and/or the chromaticity correction coefficient of described LED pixel.
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| CN104464623A (en) * | 2014-12-05 | 2015-03-25 | 西安诺瓦电子科技有限公司 | Method and device for adjusting low gray scales of LED |
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| CN106373497A (en) * | 2016-11-21 | 2017-02-01 | 西安诺瓦电子科技有限公司 | Method for realizing LED (light-emitting diode) module replacement of LED box body |
| CN107301836A (en) * | 2017-06-26 | 2017-10-27 | 深圳市洲明科技股份有限公司 | A kind of bearing calibration of LED display and means for correcting |
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| CN113380181B (en) * | 2020-02-25 | 2023-12-05 | 西安诺瓦星云科技股份有限公司 | Display screen correction system |
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| CN112601031A (en) * | 2020-11-26 | 2021-04-02 | 西安诺瓦星云科技股份有限公司 | Method and device for uploading correction coefficient of LED pixel, storage medium and processor |
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