CN101996614B - Full-screen color correction method for LED display and implementation system thereof - Google Patents
Full-screen color correction method for LED display and implementation system thereof Download PDFInfo
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Abstract
The invention provides a full-screen color correction method for an LED display and an implementation system thereof, wherein the system comprises a correcting computer, a camera, an optical tester, an integrating sphere, a display control computer, an LED controller and a scanning control panel, wherein the camera and the optical tester respectively carry out parameter sampling on the partitions and full screen of the LED display, and after correction of brightness and chromaticity on the pixel level and the module level of the partitions and the full screen on the correcting computer, the corrected data are transmitted to the scanning control panel of the LED display and stored. The full-screen color correction method and the implementation system thereof of the invention realize full-screen color correction of the LED display, and overcome the defect that after LED modules are corrected one by one by a conventional discrete correction method, when the time, environment and operation are inconsistent, individual LED modules have brightness or chromatic aberration observable by naked eyes, thereby improving the correction quality and correction efficiency.
Description
Technical field
The present invention relates to LED display technical field, relate in particular to a kind of full frame color calibration method of LED display and realize system.
Background technology
Due to production technology, LED fluorescent tube exists the inconsistency of brightness and wavelength, and this has caused using the display screen of LED fluorescent tube need to carry out color correction.
At present, the color calibration method of LED display is: to the LED fluorescent tube of different colours according to brightness and colourity stepping in advance, by the fluorescent tube composition LED display of identical class.Or adopt conventional discrete bearing calibration camera to forming tens of, hundreds of modules of LED display or red, green, blue, the Bai Sise of modular unit take pictures respectively, and photo is inputted to analysis and the homogenising processing thereof of in computing machine, carrying out brightness, data input LED module after treatment or module are stored, so that in the time of LED module or module work, shades of colour is carried out to real time correction.
There is certain defect in said method:
1, owing to will, to LED fluorescent tube stepping in advance, having increased the cost of product.
2, be one by one to proofreading and correct at LED module or module due to what adopt, in the time of time, environment and operation inconsistent, have unavoidably indivedual LED modules or module and have the observable difference in brightness of naked eyes or aberration, so need to carry out secondary or proofread and correct for three times, increase working strength, reduced correction efficiency.
3, also there is certain color error in camera itself, has influence on the color dot calibration result of LED display.
Summary of the invention
For this reason, technical matters to be solved by this invention is: a kind of full frame color calibration method of LED display is provided and realizes system, realize the full frame color correction to LED display, to overcome the defect described in background technology.
So, the invention provides a kind of full frame color calibration method of LED display, the method comprises:
Step 1, determine the required systematic parameter of the full frame color correction of LED display, and according to the resolution of LED display, LED display is divided into the subregion matching with camera resolution, subregion is carried out to pixel location, camera adjustment, and a selected subregion carries out the crude sampling of required correction parameter;
Step 2, determine correction target parameter and permissible error, and to a color correction of subregion work and school post-sampling, through calculation process, if colourity, brightness and colour temperature error, in correction error allowed band, are carried out next step, otherwise, repeat this step, until the parameter error after proofreading and correct is in allowed band;
Step 3, successively carries out Pixel-level, module level brightness and chromaticity correction to each subregion, sends the data after proofreading and correct to aobvious control computer, then send LED controller and LED display to by aobvious control computer after calculation process;
Step 4, taking full frame as unit, to full frame module level brightness and the chromaticity correction of carrying out of LED display, after calculation process, send the data after proofreading and correct to aobvious control computer, send LED controller and LED display to by aobvious control computer again, aobvious control computer is preserved described data with document form, and LED display solidifies taking module or module the described data that preservation receives as unit.
Wherein, described in step 1, subregion is carried out to pixel location, camera adjustment, and a selected subregion carries out the crude sampling of required correction parameter, comprising:
By optical tester respectively brightness and the colourity of the redness to each subregion, green, blueness and White LED fluorescent tube sample, and select a minimum subregion of brightness to proofread and correct the sampling subregion of index as determining;
By camera, selected subregion is found a view and focused on, and location of pixels is demarcated in image;
By white standard light source, camera is carried out to uniform field correction;
Initial parameter before the school of each colour brightness, colourity and the colour temperature of the selected subregion obtaining is charged in correcting computer;
To the demarcation that expose respectively of camera redness, green, blueness and the white required optical filter of sampling and time shutter, to match with optical tester.
Wherein, the required systematic parameter of the full frame color correction of described LED display comprises: full frame resolution, module resolution, module resolution, pel spacing and pixel red, green and blue LED lamp are from the side-play amount of pixel center point.
Wherein, step 3 comprises:
Each subregion is carried out to the equilibrium treatment of Pixel-level RGB brightness, colorimetric parameter sampling and data thereof, with proximity correction target component, and send the data after proofreading and correct to aobvious control computer and LED display;
Each subregion is carried out to the equilibrium treatment of Pixel-level white brightness and color temperature parameters sampling and data thereof, with proximity correction target component, and send the data after proofreading and correct to aobvious control computer and LED display;
Each subregion is carried out to the equilibrium treatment of module level RGB brightness, colorimetric parameter sampling and data thereof, with proximity correction target component, and send the data after proofreading and correct to aobvious control computer and LED display;
Each subregion is carried out to the equilibrium treatment of module level white brightness and color temperature parameters sampling and data thereof, with proximity correction target component, and send the data after proofreading and correct to aobvious control computer and LED display.
Wherein, step 4 comprises:
With full frame as a whole, adjust camera focal length and find a view to LED display is full frame, each module is demarcated in image as unit taking module;
By white standard light source, camera is carried out to uniform field correction;
Obtain redness, green, blueness and the white intrinsic brilliance parameter of LED display central area by optical tester;
Sample required optical filter and time shutter of camera exposed and demarcated and brightness calibration so that and optical tester picture coupling;
To full frame equilibrium treatment of carrying out module level RGB brightness, colorimetric parameter sampling and data thereof, with proximity correction target component, and send the data after proofreading and correct to aobvious control computer and LED display;
To full frame equilibrium treatment of carrying out module level white brightness and color temperature parameters sampling and data thereof, with proximity correction target component, and send the data after proofreading and correct to aobvious control computer and LED display;
Aobvious control computer is preserved described correction data with document form, and LED display solidifies taking module or module the described correction data that preservation receives as unit.
The present invention also provides a kind of system that realizes the full frame color correction of LED display, this system comprises: for controlling the correcting computer of whole corrective system, be connected the camera for acquisition correction parameter with correcting computer, be connected and be used for obtaining LED display redness with correcting computer, green, the optical tester of blue and white intrinsic brilliance and chroma samples parameter, be used to camera to carry out uniform field and proofread and correct the integrating sphere that white standard light source is provided, as LED display playback equipment aobvious control computer for communicating with described correcting computer in the time that display screen carries out full frame color correction, and for realizing the LED controller that LED display intercoms mutually with aobvious control computer and the scan control plate showing for controlling LED display scanning, described camera and optical tester are respectively to LED display subregion and the full frame parameter sampling that carries out of LED display, on correcting computer, pass through Pixel-level, after module level parameter correction, correction data is sent to described aobvious control computer, aobvious control computer sends correction data to by LED controller the scan control plate of LED display, and preserve.
Wherein, described correcting computer and aobvious control computer are by wired or wireless network transmissions data.
Described correcting computer comprises following function unit:
Proofread and correct preparatory unit, for determining the full frame color correction parameter of LED display;
Division unit, for according to the resolution of LED display, is divided into LED display the subregion matching with camera resolution;
Acquiring unit, for the camera by being connected with correcting computer and optical tester, obtains sampling parameter;
Correcting unit, carries out Pixel-level, module level color correction for the sampling parameter that acquiring unit is obtained to each subregion of LED display, the full frame priority of LED display;
Transmitting element, is transferred to aobvious control computer for the correction data after correcting unit is proofreaied and correct.
Wherein, described scan control plate is installed in each module of LED display, above has non-volatile memories body, for storing correction data.
Wherein, described correction data, refer to the correction coefficient of each pixel generating after proofreading and correct, it is configured to each 3 totally nine coefficients of every kind of color of RGB, the length of each coefficient is 16bit, comprises 16bit brightness data after red-correction and redness is carried out 16bit brightness data after the green and 16bit blue data of the 16bit of colourity compensation, green correction and green is carried out to the 16bit brightness data after the 16bit redness of colourity compensation and 16bit blue data, blue-correction and 16bit green and the 16bit red data that blueness is carried out to colourity compensation.
The full frame color calibration method of LED display of the present invention and realize system, by each subregion to LED display and full frame Pixel-level and the module level parameter correction of carrying out, after proofreading and correct, data are passed to LED display, and correction of a final proof result is saved in LED display, realize the full frame color correction to LED display, overcome adopting during classic method proofreaies and correct one by one to LED module or module, work as the time, when environment and operation inconsistent, indivedual LED modules or module exist naked eyes to can be observed the drawback of brightness or aberration, correction mass and efficiency are improved.Meanwhile, removed produce before to LED fluorescent tube stepping operation in advance, reduced cost of products.
Further, by camera is carried out to uniform field correction, overcome the drawback that camera itself in prior art exists certain color error, affects the full frame color effects of LED display.
The present invention is particularly useful for the color correction of ultrahigh resolution LED display.
Brief description of the drawings
Fig. 1 is the full frame color calibration method schematic flow sheet of LED display described in the embodiment of the present invention;
Fig. 2 is the structural representation of realizing the full frame color corrected system of LED display described in the embodiment of the present invention;
Fig. 3 is that correcting computer functional unit forms schematic diagram described in the embodiment of the present invention.
Embodiment
Below, describe the present invention by reference to the accompanying drawings.
The present embodiment provides a kind of full frame color calibration method of LED display and has realized system,
Wherein, the method can be divided into three phases, and the first stage is the preparatory stage:
Step 101, determines systematic parameter.Start correction software, by correcting computer 50, the full frame parameter of LED display 40 is determined, this parameter comprises that full frame resolution, module resolution, module resolution, pel spacing and pixel red, green and blue LED lamp are from the side-play amount of pixel center point etc.;
Step 102, full frame subregion.According to the resolution of LED display, by correcting computer 50, LED display 40 is divided into the subregion matching with camera 60 resolution, the present embodiment has been divided four subregions;
Step 103, subregion pixel location.An optional subregion, operation adjustment computing machine 50 is found a view and focuses on this subregion by camera 60, in the image of taking, mark starting point and the stop of subregion, and taking pixel as unit, subregion is made to image scaled according to systematic parameter and demarcate, determine the physical location of the each pixel of subregion in image;
Step 104, the adjustment of subregion camera.First by integrating sphere 80 align cameras 60, carry out uniform field correction by correcting computer 50 operate camera 60, wherein, integrating sphere 80 is a kind of white standard light sources, converting after aperture or focal length for camera, carry out white calibration, to overcome the heterogeneity of camera photosensitive pixel, the decay of lens cosine and vignette are on taking the impact of precision, secondly start or manual operation optical tester 70 by correcting computer 50, respectively to LED display 40 each subregion redness, green, blue and white intrinsic brilliance and colourity are tested, and select a minimum subregion of brightness as standard sample subregion, its original test value is as being logged in correcting computer 50 with the calibration reduced parameter of camera 60, start afterwards camera 60, red to this subregion respectively by this camera, green, blue, the white demarcation that exposes, required optical filter of all kinds and time shutter while making each subregion color correction to determine, so that with optical tester matches,
Step 105, parameter sampling.Correcting computer 50 by camera 60 red, green, blue to standard sample subregion, white brightness, colourity and colour temperature of all kinds carry out actual samples, and be automatically recorded in correcting computer 50, so that next step determines Subarea calibration index;
Step 106, determines target component.Correcting computer 50 is determined automatically according to the initial parameter of standard sample subregion or artificial white brightness, colour temperature target component and the error of determining after brightness, colourity target component and error and correction after red, green, blue led is proofreaied and correct;
Step 107, target component checking.Operation adjustment computing machine 50 and camera 60 are once proofreaied and correct and school post-sampling standard sample subregion, and correcting computer 50 carries out generating after comparing calculation is processed the correction coefficient of all kinds of each pixel to sampling parameter and target component, to approach desired value;
Step 108, judgement up to standard.Judge that sampling parameter after proofreading and correct is whether in correction error allowed band, if, carry out step below, if do not exist, forward step 106 to, re-execute step 106 and step 107, until proofread and correct result in error allowed band.
So far, the preparatory stage completes.Enter subordinate phase below, i.e. the Subarea calibration stage:
Step 201, subregion Pixel-level is once proofreaied and correct and is transmitted.Correcting computer 50 carries out respectively the shooting sampling of Pixel-level RGB brightness and colourity to each subregion of LED display 40 by camera 60, then to the RGB of each each pixel of subregion, (Red is red, Green is green, Blue indigo plant) data carry out equilibrium treatment, 16bit brightness data after proofreading and correct for the redness generation of each pixel itself, and the 16bit green and the 16bit blue data that redness are carried out to colourity compensation, 16bit brightness data after proofreading and correct for the green generation of each pixel itself, and the 16bit redness and the 16bit blue data that green are carried out to colourity compensation, 16bit brightness data after proofreading and correct for the blueness generation of each pixel itself, and the 16bit green and the 16bit red data that blueness are carried out to colourity compensation, totally nine coefficients, the formation of the correction coefficient of each pixel generating is every look 48bit (i.e. 6 bytes or 3 word lengths), to approach target correction parameter, and by wired or wireless network, for example wireless network 100 sends aobvious control computer 41 to, aobvious control computer 41 sends data to scan control plate 43 in LED display 40 by LED controller 42 again, by LED display, the result of proofreading and correct is shown,
Step 202, subregion Pixel-level secondary correction and transmission.Correcting computer 50 carries out respectively the shooting sampling of Pixel-level white brightness and colour temperature to each subregion of LED display 40 by camera 60, then each pixel data of each subregion is carried out to white balance processing, to approach target correction parameter, and by wired or wireless network, for example wireless network 100 sends aobvious control computer 41 to, aobvious control computer 41 sends data to scan control plate 43 in LED display 40 by LED controller 42 again, by LED display, the result of proofreading and correct is shown;
Step 203, division module is once proofreaied and correct and is transmitted.Correcting computer 50 carries out respectively the shooting sampling of module level RGB brightness and colourity to each subregion of LED40 by camera 60, then the pixel data of each module is carried out to equilibrium treatment, with RGB brightness and Chroma Error between cancellation module and module, make it more approach RGB target correction parameter, and by wired or wireless network, for example wireless network 100 sends aobvious control computer 41 to, aobvious control computer 41 sends data to scan control plate 43 in LED display 40 by LED controller 42 again, by LED display, the result of proofreading and correct is shown;
Step 204, division module level secondary correction and transmission.Brightness and colour temperature that correcting computer 50 carries out respectively module level white by camera 60 to each subregion of LED40 are taken sampling, then the data of each module are carried out to white balance processing, to approach target correction parameter, and by wired or wireless network, for example wireless network 100 sends aobvious control computer 41 to, aobvious control computer 41 sends data to scan control plate 43 in LED display 40 by LED controller 42 again, by LED display, the result of proofreading and correct is shown.
So far, the Subarea calibration stage completes.Enter the phase III below, i.e. full frame calibration phase:
Step 301, full frame location.Taking full frame as unit, adjust the focal length of camera 60, operation adjustment computing machine 50 is found a view to LED display is full frame by camera 60, and does image scaled taking module as unit and demarcate;
Step 302, carries out camera adjustment to full frame.By integrating sphere 80 align cameras 60, and light, the uniform field that operation adjustment computing machine 50 carries out after focal length change camera 60 is proofreaied and correct, start optical tester 70, redness by this optical tester to LED display 40 full frame central areas, green, blue and white intrinsic brilliance is tested, its test value is logged in correcting computer 50, start camera 60, by this camera respectively to full frame red, green, blue, white is exposed and is demarcated and brightness calibration, required optical filter of all kinds and time shutter when determining full frame color correction, so that with optical tester matches,
Step 303, full frame module level is once proofreaied and correct and is transmitted.Correcting computer 50 is taken sampling by camera 60 to full frame module level RGB brightness and the colourity of carrying out, then the RGB data of each module to LED display 40 are carried out equilibrium treatment, the subregion brightness and the Chroma Error that are produced to eliminate each Subarea calibration, and by wired or wireless network, for example wireless network 100 sends aobvious control computer 41 to, aobvious control computer 41 sends data to scan control plate 43 in LED display 40 by LED controller 42 again,, by LED display, the result of proofreading and correct is shown;
Step 304, full frame module level secondary correction and transmission.Correcting computer 50 is taken sampling by camera 60 to full frame module level white brightness and the colour temperature of carrying out, then each module data of LED display is carried out to white balance processing, reach unanimity with the white brightness and the colour temperature that make each subregion, and by wired or wireless network, for example wireless network 100 sends aobvious control computer 41 to, aobvious control computer 41 sends data to scan control plate 43 in LED display 40 by LED controller 42 again,, by LED display, the result of proofreading and correct is shown;
Step 305, full frame data are preserved.After full frame correction completes, calibrated computing machine 50 detects and artificial subjective assessment, if proofreading and correct result meets the demands, by correcting computer 50, correction data is passed through to wired or wireless network, for example wireless network 100 sends aobvious control computer 41 to, aobvious control computer 41 sends data to scan control plate 43 in LED display 40 by LED controller 42 again, carries out correction data and solidifies preservation.
So far, complete full frame calibration phase., the full frame color correction of LED display completes.
By the full frame color calibration method of LED display described above, we see, LED display is divided into some subregions, by each subregion to LED display and full frame Pixel-level and the module level parameter correction of carrying out, realize the full frame color correction to LED display, overcome conventionally adopting in the method that LED module or module are proofreaied and correct one by one, in the time that time, environment and operation are inconsistent, there is the observable aberration drawback of naked eyes in indivedual LED modules or module, has improved quality and the efficiency of proofreading and correct.Meanwhile, removed produce before to LED fluorescent tube stepping operation in advance, reduced cost of products.Further, by camera is carried out to uniform field correction, overcome camera itself in prior art and also had certain color error, affected the drawback of the full frame color of LED display.
The present embodiment also provides a kind of system that realizes the full frame color correction of LED display, and this system comprises: LED display 40, aobvious control computer 41, LED controller 42, correcting computer 50, camera 60, optical tester 70 and integrating sphere 80.
LED display 40 is full-color LED display screen, is controlled by aobvious control computer 41 and LED controller 42, and wherein LED display 40 also comprises scan control plate 43;
Scan control plate 43, be arranged in each module of LED display 40, each scan control plate 43 is responsible for the scanning demonstration work of a casing LED lamp, its inside is also provided with the LED display color correction software module described in the present embodiment, data receiver, processing, computing and demonstration during for color correction, and there is a non-volatile memories body storage correction data.
Aobvious control computer 41, it is the playback equipment of LED display 40, except installing display screen playout software, general control software, LED display color correction software described in the present embodiment is also installed, the reception of the setting of state, correction data and packing transmission during for color correction.In the time that aobvious control computer 41 uses as color correction, it is by wired or wireless network, for example wireless network 100 is controlled by correcting computer 50, and LED display 40 is made to associative operation, the such as transmission of the unlatching of RGB white, brilliance control and correction data etc.Usually, aobvious control computer 41 is connected with LED controller 42 by DIV video output interface, USB interface or com interface.
LED controller 42, it is the control system of LED display 40, it upwards connects aobvious control computer 41, connect LED display 40 downwards, its inside is except installing the demonstration control software of LED display, LED display color correction software module described in the present embodiment is also housed, the switching of communication link and the relay transmission of color correction data during for color correction.
Correcting computer 50, for the color correction of system control LED display, its inside is provided with the full frame color correction software of LED display described in the present embodiment, usually, be connected with camera 60, optical tester 70 by USB interface, by wired or wireless network, for example wireless network 100 is connected with aobvious control computer 41.
Camera 60, is to have high-resolution specialized camera, and its automatic focus, exposure are controlled by correcting computer 50 by USB mouth.
Optical tester 70, is a kind of optical test equipment that redness, green and blue brightness, colourity test and white color temperature are measured that has, and usually, is connected with correcting computer 50 by USB mouth.The preferred CS-2000 model of optical tester 70.
Integrating sphere 80, is a kind of white standard light source, after conversion aperture or focal length, carries out white calibration for camera, to overcome heterogeneity, the decay of lens cosine and the impact of vignette on shooting precision of camera photosensitive pixel.
For realizing the full frame color correction of LED display described in the present embodiment, correcting computer 50 comprises following function unit:
Proofread and correct preparatory unit 51, for determining the full frame color correction parameter of LED display;
Division unit 52, for according to the resolution of LED display, is divided into LED display the subregion matching with camera resolution;
Acquiring unit 53, for the camera by being connected with correcting computer and optical tester, obtains sampling parameter;
Correcting unit 54, carries out Pixel-level, module level parameter correction for the sampling parameter that acquiring unit is obtained to each subregion of LED display, the full frame priority of LED display;
Transmitting element 55, is transferred to aobvious control computer 41 for the correction data after correcting unit is proofreaied and correct.
In sum, the full frame color calibration method of LED display and realize system described in the present embodiment, by each subregion to LED display and full frame Pixel-level and the module level parameter correction of carrying out, after proofreading and correct, data are passed to LED display, and correction of a final proof result is saved in LED display, realize the full frame color correction to LED display, overcome adopting during classic method proofreaies and correct one by one to LED module or module, work as the time, when environment and operation inconsistent, indivedual LED modules or module exist naked eyes to can be observed the drawback of brightness and aberration, correction mass and efficiency are improved.Meanwhile, removed produce before to LED fluorescent tube stepping operation in advance, reduced cost of products.
Further, by camera is carried out to uniform field correction, overcome camera itself in prior art and also had certain color error, affected the drawback of the full frame color of LED display.
The present embodiment is particularly useful for the color correction of ultrahigh resolution LED display.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a full frame color calibration method for LED display, is characterized in that, comprising:
Step 1, determine the required systematic parameter of the full frame color correction of LED display, and according to the resolution of LED display, LED display is divided into the subregion matching with camera resolution, subregion is carried out to pixel location, camera adjustment, and a selected subregion carries out the crude sampling of required correction parameter;
Step 2, determine correction target parameter and permissible error, and to a color correction of subregion work and school post-sampling, through calculation process, if colourity, brightness and colour temperature error, in correction error allowed band, are carried out next step, otherwise, repeat this step, until the parameter error after proofreading and correct is in allowed band;
Step 3, successively carries out Pixel-level, module level brightness and chromaticity correction to each subregion, sends the data after proofreading and correct to aobvious control computer, then send LED controller and LED display to by aobvious control computer after calculation process;
Step 4, taking full frame as unit, to full frame module level brightness and the chromaticity correction of carrying out of LED display, after calculation process, send the data after proofreading and correct to aobvious control computer, send LED controller and LED display to by aobvious control computer again, aobvious control computer is preserved described data with document form, and LED display solidifies taking module or module the described data that preservation receives as unit.
2. method according to claim 1, is characterized in that, described in step 1, subregion is carried out to pixel location, camera adjustment, and a selected subregion carries out the crude sampling of required correction parameter, comprising:
By optical tester respectively brightness and the colourity of the redness to each subregion, green, blueness and White LED fluorescent tube sample, and select a minimum subregion of brightness to proofread and correct the sampling subregion of index as determining;
By camera, selected subregion is found a view and focused on, and location of pixels is demarcated in image;
By white standard light source, camera is carried out to uniform field correction;
Initial parameter before the school of each colour brightness, colourity and the colour temperature of the selected subregion obtaining is charged in correcting computer;
To the demarcation that expose respectively of camera redness, green, blueness and the white required optical filter of sampling and time shutter, to match with optical tester.
3. method according to claim 1, it is characterized in that, the required systematic parameter of the full frame color correction of described LED display comprises: full frame resolution, module resolution, module resolution, pel spacing and pixel red, green and blue LED lamp are from the side-play amount of pixel center point.
4. method according to claim 1, is characterized in that, step 3 comprises:
Each subregion is carried out to the equilibrium treatment of Pixel-level RGB brightness, colorimetric parameter sampling and data thereof, with proximity correction target component, and send the data after proofreading and correct to aobvious control computer and LED display;
Each subregion is carried out to the equilibrium treatment of Pixel-level white brightness and color temperature parameters sampling and data thereof, with proximity correction target component, and send the data after proofreading and correct to aobvious control computer and LED display;
Each subregion is carried out to the equilibrium treatment of module level RGB brightness, colorimetric parameter sampling and data thereof, with proximity correction target component, and send the data after proofreading and correct to aobvious control computer and LED display;
Each subregion is carried out to the equilibrium treatment of module level white brightness and color temperature parameters sampling and data thereof, with proximity correction target component, and send the data after proofreading and correct to aobvious control computer and LED display.
5. method according to claim 1, is characterized in that, step 4 comprises:
With full frame as a whole, adjust camera focal length and find a view to LED display is full frame, each module is demarcated in image as unit taking module;
By white standard light source, camera is carried out to uniform field correction;
Obtain redness, green, blueness and the white intrinsic brilliance parameter of LED display central area by optical tester;
Sample required optical filter and time shutter of camera exposed and demarcated and brightness calibration so that and optical tester picture coupling;
To full frame equilibrium treatment of carrying out module level RGB brightness, colorimetric parameter sampling and data thereof, with proximity correction target component, and send the data after proofreading and correct to aobvious control computer and LED display;
To full frame equilibrium treatment of carrying out module level white brightness and color temperature parameters sampling and data thereof, with proximity correction target component, and send the data after proofreading and correct to aobvious control computer and LED display;
Aobvious control computer is preserved described correction data with document form, and LED display solidifies taking module or module the described correction data that preservation receives as unit.
6. realize the system of the full frame color correction of LED display for one kind, it is characterized in that, comprise: for controlling the correcting computer of whole corrective system, be connected the camera for acquisition correction parameter with correcting computer, be connected and be used for obtaining LED display redness with correcting computer, green, the optical tester of blue and white intrinsic brilliance and chroma samples parameter, be used to camera to carry out uniform field and proofread and correct the integrating sphere that white standard light source is provided, as LED display playback equipment aobvious control computer for communicating with described correcting computer in the time that display screen carries out full frame color correction, and for realizing the LED controller that LED display intercoms mutually with aobvious control computer and the scan control plate showing for controlling LED display scanning, described camera and optical tester are respectively to LED display subregion and the full frame parameter sampling that carries out of LED display, on correcting computer, pass through Pixel-level, after module level parameter correction, correction data is sent to described aobvious control computer, aobvious control computer sends correction data to by LED controller the scan control plate of LED display, and preserve.
7. system according to claim 6, is characterized in that, described correcting computer and aobvious control computer are by wired or wireless network transmissions data.
8. system according to claim 6, is characterized in that, described correcting computer comprises following function unit:
Proofread and correct preparatory unit, for determining the full frame color correction parameter of LED display;
Division unit, for according to the resolution of LED display, is divided into LED display the subregion matching with camera resolution;
Acquiring unit, for the camera by being connected with correcting computer and optical tester, obtains sampling parameter;
Correcting unit, carries out Pixel-level, module level color correction for the sampling parameter that acquiring unit is obtained to each subregion of LED display, the full frame priority of LED display;
Transmitting element, is transferred to aobvious control computer for the correction data after correcting unit is proofreaied and correct.
9. system according to claim 6, is characterized in that, described scan control plate is installed in each module of LED display, above has non-volatile memories body, for storing correction data.
10. according to the system described in claim 6 or 9, it is characterized in that, described correction data, refer to the correction coefficient of each pixel generating after proofreading and correct, it is configured to each 3 totally nine coefficients of every kind of color of RGB, the length of each coefficient is 16bit, comprise the 16bit brightness data after red-correction and the 16bit green and the 16bit blue data that redness are carried out to colourity compensation, 16bit brightness data after green correction and the 16bit redness and the 16bit blue data that green are carried out to colourity compensation, 16bit brightness data after blue-correction and the 16bit green and the 16bit red data that blueness are carried out to colourity compensation.
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