CN101650914B - A kind of point-to-point correction system - Google Patents
A kind of point-to-point correction system Download PDFInfo
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- CN101650914B CN101650914B CN200910087061.5A CN200910087061A CN101650914B CN 101650914 B CN101650914 B CN 101650914B CN 200910087061 A CN200910087061 A CN 200910087061A CN 101650914 B CN101650914 B CN 101650914B
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Abstract
The invention discloses a kind of point-to-point correction system, it is characterized in that, comprising: LED display, luminometer, camera, Correction Processor and scanning monitor; Realizing the brightness of each lamp point in LED display module inside homogeneous, also assures that between each LED display module, brightness is homogeneous, meanwhile, also solving correction data file and LED display module is difficult to problem one to one when assembling.
Description
Technical field
The present invention relates to LED and show field, in particular, a kind of system architecture of LED display being carried out to brightness point by point correction.
Background technology
LED screen is by hundreds of thousands and even semiconductor light-emitting-diode up to a million, that is: LED point combines.All factors such as to block according to inconsistent, the dust of lamp point, the shade of guard lamp point of the optical characteristics difference of lamp point, component ageing, driving error, the angle of lamp point own and all can cause the uneven of screen lamp point brightness.The main path of this non-uniform phenomenon of current solution: one is the consistance improving LED optical characteristics, two is the homogeneity being improved display screen by the mode of correction.The coherence method improving LED optical characteristics changes screen, and this not only needs a large amount of manpower, and the time also has substantial contribution.And the correcting mode of screen intensity utilizes luminance meter to measure each LED point, obtaining the brightness value of each LED point, then by calculating, being adjusted value, by control circuits such as electric currents, LED point is adjusted again, reach the homogeneous value of specifying.Need like this to carry out value one by one to each point, operate loaded down with trivial details, system complex, overlong time, manual operation is too much, and precision is low, inefficiency.
China's application number is: the invention of 200710076632.6, its name is called: a kind of lightness data obtaining method for LED luminance correction and equipment thereof, that application discloses method and the equipment thereof of a kind of LED correction, its shortcoming is: one is that memory module and LED display module are separate, when reinstalling LED display module, correction data can not be corresponding very well with LED display module; Two is that the parameter of different LED module is different, and only carry out brightness adjustment in inside modules, the brightness each other of each module is difficult to homogenization.
Therefore, prior art existing defects, needs to improve.
Summary of the invention
Technical matters to be solved by this invention is for the deficiencies in the prior art, provides a kind of system architecture of LED display being carried out to brightness point by point correction of optimization.
Technical scheme of the present invention is as follows:
A kind of point-to-point correction system, comprising: comprise the LED display of at least one LED display unit and at least one driving circuit, luminometer, camera, Correction Processor and scanning monitor; Described driving circuit comprises constant current driven element unit, data processing subelement and storing sub-units;
Described luminometer is connected with described Correction Processor respectively with described camera, and described luminometer, for gathering the brightness data of each LED display unit, is transferred to described Correction Processor; Described camera, for obtaining the dot matrix image data of each LED display unit, is transferred to described Correction Processor;
Described Correction Processor, for receiving and processing described dot matrix image data and described brightness data, obtains data file 1 and data file 2 respectively, and adopts data file 2 to revise data file 1, obtain pointwise correction file;
Described Correction Processor is also connected with described scanning monitor, and described scanning monitor is connected with described LED display, for described pointwise correction file to be sent to the storing sub-units of corresponding LED display unit by described scanning monitor, is stored by it;
Described scanning monitor is used for distributing pixel data to each described driving circuit;
Described data processing subelement is for receiving described pixel data, use pixel data described in pointwise correction file processing, export driving data to described constant current driven element unit, described constant current driven element unit controls LED display unit display information according to described driving data.
Described point-to-point correction system, described storing sub-units is serial interface flash memory.
Described point-to-point correction system, described Correction Processor is computing machine, PC, notebook computer or on-site programmable gate array FPGA.
Described point-to-point correction system, described Correction Processor comprises dot matrix image data processing unit, brightness data processing unit, correction file generation unit;
Described dot matrix image data processing unit is for receiving described dot matrix image data, and process generates described data file 1, exports to described correction file generation unit;
Described brightness data processing unit is for receiving described brightness data, and process generates described data file 2, goes out to be defeated by described correction file generation unit;
Described correction file generation unit is used for revising described data file 1 according to described data file 2, obtains described pointwise correction file.
Described point-to-point correction system, wherein, described Correction Processor also arranges the transmission unit be connected with described scanning monitor, for described pointwise correction file is sent to described scanning monitor.
Described point-to-point correction system, wherein, described dot matrix image data processing unit comprises the brightness value connected in turn and extracts subelement and correction coefficient generation subelement, described brightness value extracts subelement for extracting the brightness value of each lamp point in described dot matrix image data, and described correction coefficient generation unit obtains pointwise correction coefficient for the treatment of described brightness value.
Described point-to-point correction system, wherein, described camera and described luminometer are placed in apart from 10 to 12 meters of, described LED display front.
Described point-to-point correction system, wherein, also comprises a servo control mechanism, and described servo control mechanism is placed in front, described LED display front, moves in the two-dimensional space parallel with described LED display for driving described luminometer and described camera.
Described point-to-point correction system, wherein said luminometer and described camera vertically superpose to install and arrange.
Or described luminometer and described camera laterally install setting side by side.
Described point-to-point correction system, wherein, described Correction Processor arranges control module, for sending control signals to described camera, described luminometer and described servo control mechanism respectively, controls described camera, described luminometer and described servo control mechanism co-ordination.
Adopt such scheme, the present invention is combined into row data acquisition by adopting camera and luminometer, namely the brightness of each lamp point is realized in LED display module inside homogeneous, also assures that between each LED display module, brightness is homogeneous, meanwhile, correction data file is also solved and LED display module is difficult to problem one to one when assembling.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the embodiment of the present invention 1;
Fig. 2 is the LED display front schematic view of embodiment described in Fig. 1;
Fig. 3 is the LED display schematic rear view of embodiment described in Fig. 1;
Fig. 4 is the driving circuit principle figure of embodiment described in Fig. 1;
Fig. 5 is the schematic diagram of the embodiment of the present invention 2;
Fig. 6 is the schematic diagram of the embodiment of the present invention 3;
Fig. 7 is the schematic diagram of the embodiment of the present invention 4.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
As shown in Figure 1, the present embodiment provides a kind of point-to-point correction system, and with reference to figure 2, Fig. 3, Fig. 4, this point-to-point correction system comprises: LED display 11, luminometer 12, camera 13, Correction Processor 14 and scanning monitor 15; LED display comprises at least one LED display unit 111 and at least one driving circuit 112, wherein, driving circuit 112 comprises constant current driven element unit 1123, data processing subelement 1122 and storing sub-units 1121, storing sub-units 1121 is for storing pointwise correction file, data processing subelement 1122 is for receiving pixel data, use pointwise correction file processing pixel data, export driving data to constant current driven element unit 1123, constant current driven element unit 1123 controls LED display unit 111 according to driving data and shows information; Scanning monitor 15 is for distributing pixel data to each driving circuit 112.
Luminometer 12 is connected with Correction Processor 14 respectively with camera 13, and Correction Processor 14 is connected with scanning monitor 15, and scanning monitor 15 is connected with LED display 11; Luminometer 12 is for gathering the brightness data of LED display unit 111, and camera 13 is for obtaining the dot matrix image data of LED display unit 111; Correction Processor 14 is for receiving brightness data and dot matrix image data, and process dot matrix image data, obtain data file 1; Process brightness data, obtain data file 2, data file 1 revised by usage data file 2, obtains pointwise correction file, and the storing sub-units 1121 that pointwise correction file is issued to corresponding LED display unit by scanning monitor 15 order wire stores by Correction Processor 14.
Preferred Correction Processor adopts computing machine, PC, notebook computer, also on-site programmable gate array FPGA etc. can be adopted, camera uses Nikon D40 digital single-lens reflex camera, luminometer uses Ming Kesi LTL-200, storing sub-units adopts SPI (SerialPeripheralinterface, Serial Peripheral Interface)-FLASH (flash memory), i.e. SPI-FLASH.
Specifically, first use camera 13 and luminometer 12 to gather dot matrix image data and the brightness data of each LED display unit 111 respectively when carrying out pointwise correction, preferably, red, green, blue three kinds of colors can be distinguished gather respectively, namely light the red LED in each LED display unit 111 respectively, green LED, blue led carry out taking pictures and measuring brightness value, in order to improve accuracy, can multi collect view data and brightness data, average, such as gather 8 times, 10 times, 20 times view data and brightness data respectively, concrete number of times the present invention does not make considered critical, afterwards in Correction Processor 14, the dot matrix image data transmitted processed, obtain data file 1, processed by the brightness data transmitted, obtain data file 2, data file 1 revised by usage data file 2 afterwards, obtains pointwise correction file, concrete data processing method, can have a variety of, because for the present invention, the brightness value obtaining each lamp point in LED display unit 111 is most important, the brightness value how obtaining each lamp point by the view data of display unit belongs to known technology, for example, those skilled in the art can obtain the gray-scale value of each pixel, comprise R, G, B tri-numerical value, above-mentioned three numerical value are got and, also can to three numerical value squared and, the brightness value of this pixel can be obtained, regulation coefficient can be obtained afterwards by Correction Processor process brightness value obtained above, such as inverse is got to this brightness value and be multiplied by 256 again, data file 1 is generated by the regulation coefficient of each lamp point, brightness value correction data file 1 in usage data file 2 obtains pointwise correction file, the storing sub-units 1121 be arranged in LED display unit is sent to store, the method of the brightness value correction data file 1 in usage data file 2 is varied, fundamental purpose allows data file according to the standard of data file 2, again homogenization, such as, brightness number in usage data file 2 can be multiplied by regulation coefficient in data file 1, when LED display works on power, storing sub-units 1121 output calibration data of each LED display unit 111 correspondence is to data processing subelement 1122, data processing subelement uses correction data correction from the pixel data of scanning monitor 15, obtain the driving data of each LED point, send to constant current driven element unit 1123, export driving data, complete LED information displaying.
Such employing camera carries out image acquisition, once can complete a large amount of lamp point data collecting work, reduce labour intensity, improve work efficiency;
Adopt luminometer to gather the absolute brightness data of each LED display unit, afterwards after comprehensive all absolute measurement data, again revise the correction file of each LED display unit, make the effect reaching homogeneous display between LED display unit.
In the corresponding driving circuit of LED display unit, storing sub-units and data processing subelement are set, data processing speed can be improved, improve display screen refresh rate, prior when being that of avoiding center of gravity assembled LED display unit, must according to the technical matters of original order assembling.
Embodiment 2
With reference to figure 5, the present embodiment is on the basis of embodiment 1, dot matrix image data processing unit 141 is set in Correction Processor 14, brightness data processing unit 142, correction file generation unit 143, dot matrix image data processing unit 141 receives dot matrix image data, process generates data file 1, export to correction file generation unit 143, brightness data processing unit 142 receives brightness data, process generates data file 2, export to correction file generation unit 143, data file 1 revised by correction file generation unit 143 usage data file 2, obtain pointwise correction file, each LED display unit is downloaded to by communication line, such image data processing unit 141, brightness data processing unit 142, correction file generation unit 143 is divided labour with individual responsibility, be convenient to increase work efficiency, and simplify system.
Another example, can also the transmission unit 144 be connected with scanning monitor 15 be set in Correction Processor 14, transmission unit 144 is sent to scanning monitor 15 after above-mentioned correction file can being carried out shaping, above-mentioned correction file is downloaded to LED display unit by scanning monitor 15, improve file transfer precision, avoid misdata to occur.
Embodiment 3
With reference to figure 6, on the basis of embodiment 2, the present embodiment arranges at dot matrix image data processing unit the brightness value connected in turn and extracts subelement 1411 and correction coefficient generation subelement 1412, brightness value extracts subelement 1411 for extracting the brightness value of each lamp point in dot matrix image data, correction coefficient generation unit 1412 obtains pointwise correction coefficient for the treatment of brightness value, send to correction file generation unit 143, like this, brightness value is extracted by simple algorithm, it is convenient to realize, and can reduce systematic error simultaneously.
Another example, obtains the precision of data in order to improve camera 13 and luminometer 12, preferably camera 13 and luminometer 12 are placed in distance 10-12 rice, LED display front.
Embodiment 4
With reference to figure 7, on the basis of the various embodiments described above, the present embodiment arranges a servo control mechanism 16 in systems in which, servo control mechanism 16 is placed in front, LED display 11 front, move at the two-dimensional space parallel with LED display with camera for driving luminometer, structure about servo control mechanism 16 belongs to common practise, such as servo control mechanism 16 can comprise bracing frame, X direction guiding rail, Y-direction guide rail, servomotor etc., luminometer 12 is fixedly connected with X direction guiding rail with camera 13, servo control mechanism 16 action can be controlled by Correction Processor 14, such as, in Correction Processor 14, control module is set, for sending control signals to camera 13 respectively, luminometer 12 and servo control mechanism 16, control camera respectively, co-ordination unified by luminometer and servo control mechanism, like this, servo control mechanism is used to control camera 13, luminometer 12 movement automatically, greatly increase work efficiency.
Another example, luminometer vertically superposes installation with camera, can reduce the error of luminometer and camera institute image data.
Another example, luminometer and camera can also laterally be installed side by side, can reduce the error of luminometer and camera institute image data.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (6)
1. a point-to-point correction system, is characterized in that, comprising: comprise the LED display of at least one LED display unit and at least one driving circuit, luminometer, camera, Correction Processor and scanning monitor; Described driving circuit comprises constant current driven element unit, data processing subelement and storing sub-units;
Described luminometer is connected with described Correction Processor respectively with described camera, and described luminometer, for gathering the brightness data of each LED display unit, is transferred to described Correction Processor; Described camera, for obtaining the dot matrix image data of each LED display unit, is transferred to described Correction Processor;
Described Correction Processor, for receiving and processing described dot matrix image data and described brightness data, obtains data file 1 and data file 2 respectively, and adopts data file 2 to revise data file 1, obtain pointwise correction file;
Described Correction Processor is also connected with described scanning monitor, and described scanning monitor is connected with described LED display, for described pointwise correction file to be sent to the storing sub-units of corresponding LED display unit by described scanning monitor, is stored by it;
Described scanning monitor is used for distributing pixel data to each described driving circuit;
Described data processing subelement is for receiving described pixel data, use pixel data described in pointwise correction file processing, export driving data to described constant current driven element unit, described constant current driven element unit controls LED display unit display information according to described driving data;
Described Correction Processor comprises dot matrix image data processing unit, brightness data processing unit, correction file generation unit, the transmission unit that is connected with described scanning monitor;
Described dot matrix image data processing unit is for receiving described dot matrix image data, and process generates described data file 1, exports to described correction file generation unit;
Described brightness data processing unit is for receiving described brightness data, and process generates described data file 2, exports to described correction file generation unit;
Described correction file generation unit is used for revising described data file 1 according to described data file 2, obtains described pointwise correction file;
Described transmission unit is sent to described scanning monitor after described pointwise correction file is carried out shaping, described scanning monitor by described pointwise correction file download to described LED display unit;
Described dot matrix image data processing unit comprises the brightness value connected in turn and extracts subelement and correction coefficient generation subelement, described brightness value extracts subelement for extracting the brightness value of each lamp point in described dot matrix image data, and described correction coefficient generates subelement and obtains pointwise correction coefficient for the treatment of described brightness value;
Described luminometer laterally with described camera is installed or vertically superposes installation side by side.
2. point-to-point correction system according to claim 1, is characterized in that, described storing sub-units is serial interface flash memory.
3. point-to-point correction system according to claim 1, is characterized in that, described Correction Processor is computing machine or field programmable gate array.
4., according to the arbitrary described point-to-point correction system of claims 1 to 3, it is characterized in that, described camera and described luminometer are placed in apart from 10 to 12 meters of, described LED display front.
5. according to the arbitrary described point-to-point correction system of claims 1 to 3, it is characterized in that, also comprise a servo control mechanism, described servo control mechanism is placed in front, described LED display front, moves in the two-dimensional space parallel with described LED display for driving described luminometer and described camera.
6. point-to-point correction system according to claim 5, it is characterized in that, described Correction Processor arranges control module, for sending control signals to described camera, described luminometer and described servo control mechanism respectively, control described camera, described luminometer and described servo control mechanism co-ordination.
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| CN102231251B (en) * | 2011-06-21 | 2013-08-21 | 华南理工大学 | Camera photo-based method for point-by-point inhomogeneous analysis and correction of LED (Light Emitting Diode) |
| CN102402944B (en) * | 2011-12-20 | 2014-11-12 | 深圳市奥拓电子股份有限公司 | Point-by-point correcting system and point-by-point correcting method for LED display screen |
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| CN103268752A (en) * | 2013-05-23 | 2013-08-28 | 无锡市崇安区科技创业服务中心 | LED display screen brightness and chrominance correction system |
| CN104167176B (en) * | 2014-08-13 | 2016-08-24 | 广东威创视讯科技股份有限公司 | A kind of LED box color adjustment method based on camera shooting and device |
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