CN104464633A - Method and device for correcting LED display units - Google Patents
Method and device for correcting LED display units Download PDFInfo
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Abstract
The invention relates to a method and device for correcting LED display units. The method for correcting the LED display units includes the steps that original brightness distribution data arrays of the M LED display units are used for generating brightness distribution correction parameters of the M LED display units; the brightness distribution correction parameters of the M LED display units are used for back calculation, so that back-calculated brightness distribution data arrays of the M LED display units are acquired; the back-calculated brightness distribution data arrays of the M LED display units are averaged, so that average brightness distribution data arrays of the M LED display units are acquired and used for generating common brightness distribution correction parameters; the common brightness distribution correction parameters are used for correcting brightness data in collected brightness and chromaticity information of the target LED display units and the corrected brightness and chromaticity information is used for generating correction coefficients of the target LED display units. Thus, the method at least can solve the problem that bright and dark blocks exist in the edges of a box and can not be eliminated in the prior art.
Description
Technical field
The present invention relates to LED alignment technique field, particularly a kind of bearing calibration of LED display unit and a kind of means for correcting of LED display unit.
Background technology
Due to the reason such as discreteness of the discreteness of LED, Decay Rate and circuit components, there is brightness and the inconsistent phenomenon of colourity in LED display, seriously affects display quality.In order to overcome LED display brightness, colourity non-uniformity, pointwise correction technology is arisen at the historic moment, and development rapidly, and it can improve the homogeneity of LED display significantly, improves display quality.
According to the difference of application scenario, pointwise correction technology can be divided into two kinds again: a kind of is correcting (also claiming casing to correct) by case on production line, and another kind is that on-the-spot large-size screen monitors correct (also claiming straightened up in place).Straightened up in place technology can select suitable viewing place to correct, and ensures that LED display reaches satisfied display effect in applied environment at the scene, but site environment complicated and changeable and strange land technical support are the difficult problems that restriction straightened up in place faces; Especially the cost of some external order straightened up in places and difficulty all larger.In order to ensure the homogeneity of LED display of dispatching from the factory, reduce technical support cost, casing alignment technique just embodies oneself peculiar value.Casing corrects the display quality that significantly can improve the rear LED display of splicing, and straightened up in place efficiency is higher relatively, and be not subject to the restriction in time and place, cost is also lower.
Therefore, along with the development of LED display production firm, casing alignment technique manufactures a part indispensable in link by becoming LED display, but current casing corrects, and there are some effect problems: if such as casing exist after correcting to splice between casing there is bright phaeodium in bright line problem, casing and when edge after box body splicing this bright phaeodium place still can be captured by human eye.
Summary of the invention
Therefore, for overcoming the deficiency that prior art exists, the invention provides a kind of bearing calibration of LED display unit and a kind of means for correcting of LED display unit, with the bright line problem after solving box body splicing and/or solve the problem still can seeing bright phaeodium phenomenon after the bright phaeodium of casing causes splicing, improve the correction efficiency that casing corrects simultaneously.
Particularly, the bearing calibration of a kind of LED display unit that the embodiment of the present invention provides on the one hand, it comprises step: a kind of bearing calibration of LED display unit, it is characterized in that, comprise step: (X1) utilizes the original brightness distributed data group of each LED display unit in M LED display unit to generate the Luminance Distribution corrected parameter of corresponding LED display unit, wherein M be greater than 1 natural number; (X2) the described Luminance Distribution corrected parameter of each LED display unit in a described M LED display unit is utilized to carry out the brightness distribution data group that inverse obtains the inverse of corresponding LED display unit; (X3) the brightness distribution data group of the described inverse of a described M LED display unit is averaged the mean flow rate distributed data group that obtains a described M LED display unit utilize described mean flow rate distributed data group to generate the public Luminance Distribution corrected parameter of a described M LED display unit; And (X4) utilizes described public Luminance Distribution corrected parameter revise to obtain the first correction bright chroma information to the original brightness distributed data in the bright chroma information of the target LED display unit gathered and revise according to first the correction coefficient that bright chroma information generates described target LED display unit.
In one embodiment of the invention, above-mentioned bearing calibration also comprises step: gather the bright chroma information of N number of LED display unit and obtain the described original brightness distributed data group of each LED display unit in described N number of LED display unit, wherein N be greater than 1 natural number; And from described N number of LED display unit, select a described M LED display unit, wherein M≤N according to pre-conditioned.
In one embodiment of the invention, in above-mentioned steps (X1), described original brightness distributed data group comprises multiple with LED pixel position brightness data one to one.
In one embodiment of the invention, above-mentionedly to comprise according to the pre-conditioned step selecting a described M LED display unit from described N number of LED display unit: calculate the average brightness of each LED pixel of each LED display unit in described N number of LED display unit and the overall brightness mean value of described N number of LED display unit; And the difference rejecting average brightness and described overall brightness mean value described in described N number of LED display unit exceeds the LED display unit of preset range, thus select a described M LED display unit.
In one embodiment of the invention, above-mentioned bearing calibration also comprises step: utilize a described M LED display unit described Luminance Distribution corrected parameter separately to revise to obtain the second correction bright chroma information to the described original brightness distributed data group in the bright chroma information of self gathered respectively and second revise the correction coefficient that bright chroma information generates a described M LED display unit respectively according to each, calculate the mean value of the correction coefficient of the multiple LED pixel of each edge of multiple edges of a described M LED display unit to obtain marginal correction coefficient mean value, the mean value correction coefficient mean value as a whole of the correction coefficient of multiple LED pixel in the appointed area calculating a described M LED display unit, and the ratio of the described Integral correction coefficient mean value the calculating a described M LED display unit described marginal correction coefficient mean value corresponding with each edge thus obtain described multiple edges of described M LED display unit edge modifying factor corresponding respectively, and utilize the correction coefficient of the multiple LED pixel in the corresponding edge place of described edge modifying factor to described target LED display unit to revise.
In addition, the bearing calibration of a kind of LED display unit that the embodiment of the present invention provides on the other hand, it comprises step: (Y1) utilizes the original brightness distributed data group of each LED display unit in M LED display unit to generate the Luminance Distribution corrected parameter of corresponding LED display unit, wherein M be greater than 1 natural number, (Y2) a described M LED display unit described Luminance Distribution corrected parameter is separately utilized to revise to obtain revising bright chroma information to the described original brightness distributed data group in the bright chroma information of self gathered and revise according to each correction coefficient that bright chroma information generates a described M LED display unit respectively respectively, (Y3) mean value of the correction coefficient of the multiple LED pixel of each edge of multiple edges of a described M LED display unit is calculated to obtain marginal correction coefficient mean value, the mean value correction coefficient mean value as a whole of the correction coefficient of multiple LED pixel in the appointed area calculating a described M LED display unit, and the ratio of the described Integral correction coefficient mean value the calculating a described M LED display unit described marginal correction coefficient mean value corresponding with each edge thus obtain described multiple edges of described M LED display unit edge modifying factor corresponding respectively, and (Y4) utilizes the correction coefficient of the multiple LED pixel in the corresponding edge place of described edge modifying factor to target LED display unit to revise.
In one embodiment of the invention, in above-mentioned steps (Y3), the appointed area of a described M LED display unit is the viewing area in whole viewing area of each LED display unit or each LED display unit except the viewing area of described multiple edge.
In addition, the bearing calibration of a kind of LED display unit that the embodiment of the present invention provides on the one hand again, it comprises step: (Z1) utilizes the original brightness distributed data group of each LED display unit in M LED display unit to generate the Luminance Distribution corrected parameter of corresponding LED display unit, wherein M be greater than 1 natural number, (Z2) a described M LED display unit described Luminance Distribution corrected parameter is separately utilized to revise to obtain described M LED display unit correction brightness distribution data group separately to respective described original brightness distributed data group respectively, (Z3) mean value of the brightness data of each edge multiple LED pixel in described correction brightness distribution data group of multiple edges of a described M LED display unit is calculated to obtain edge brightness mean value, the mean value average brightness as a whole of the brightness data of multiple LED pixel in described correction brightness distribution data group in the appointed area calculating a described M LED display unit, and the ratio of described edge brightness mean value corresponding to each edge calculating a described M LED display unit and described overall brightness mean value thus obtain described multiple edges of described M LED display unit edge modifying factor corresponding respectively, and (Z4) utilizes the correction coefficient of the multiple LED pixel in the corresponding edge place of described edge modifying factor to target LED display unit to revise.
In one embodiment of the invention, above-mentioned bearing calibration also comprises step: utilize the described Luminance Distribution corrected parameter of each LED display unit in a described M LED display unit to carry out the brightness distribution data group that inverse obtains the inverse of corresponding LED display unit; The brightness distribution data group of the described inverse of a described M LED display unit is averaged the mean flow rate distributed data group that obtains a described M LED display unit utilize described mean flow rate distributed data group to generate the public Luminance Distribution corrected parameter of a described M LED display unit; And utilize described public Luminance Distribution corrected parameter revise to obtain revising bright chroma information to the original brightness distributed data group in the bright chroma information of the target LED display unit gathered and generate the correction coefficient of described target LED display unit according to correction bright chroma information.
Moreover, the means for correcting of a kind of LED display unit that the embodiment of the present invention provides on the one hand, it comprises: Luminance Distribution corrected parameter generation module, for the Luminance Distribution corrected parameter utilizing the original brightness distributed data group of each LED display unit in M LED display unit to generate corresponding LED display unit, wherein M be greater than 1 natural number; The brightness distribution data group computing module of inverse, carries out for utilizing the described Luminance Distribution corrected parameter of each LED display unit in a described M LED display unit brightness distribution data group that inverse obtains the inverse of corresponding LED display unit; And public Luminance Distribution corrected parameter generation module, the brightness distribution data group for the described inverse to a described M LED display unit is averaged the mean flow rate distributed data group that obtains a described M LED display unit utilize described mean flow rate distributed data group to generate the public Luminance Distribution corrected parameter of a described M LED display unit; Wherein, described public Luminance Distribution corrected parameter is for revising the brightness data of the target LED display unit collected.
In one embodiment of the invention, above-mentioned means for correcting also comprises: edge modifying factor computing module, for: (a) utilizes a described M LED display unit described Luminance Distribution corrected parameter separately to revise to obtain to revise bright chroma information to the described original brightness distributed data group in the bright chroma information of self gathered respectively and revises according to each correction coefficient that bright chroma information generates a described M LED display unit respectively, and the mean value of correction coefficient of the multiple LED pixel of each edge of multiple edges calculating a described M LED display unit is to obtain marginal correction coefficient mean value, the mean value correction coefficient mean value as a whole of the correction coefficient of multiple LED pixel in the appointed area calculating a described M LED display unit, and the ratio of the described Integral correction coefficient mean value the calculating a described M LED display unit described marginal correction coefficient mean value corresponding with each edge thus obtain described multiple edges of described M LED display unit edge modifying factor corresponding respectively, or (b) utilize a described M LED display unit described Luminance Distribution corrected parameter separately to revise to obtain described M LED display unit correction brightness distribution data group separately to respective described original brightness distributed data group respectively, and the mean value of the brightness data of each edge multiple LED pixel in described correction brightness distribution data group of multiple edges calculating a described M LED display unit obtaining edge brightness mean value, calculate the mean value of the brightness data of multiple LED pixel in described correction brightness distribution data group in the appointed area of described M LED display unit average brightness calculate the ratio of described edge brightness mean value corresponding to each edge of a described M LED display unit and described overall brightness mean value thus obtain described multiple edges of described M LED display unit edge modifying factor corresponding respectively as a whole.Wherein, described edge modifying factor is used for the correction coefficient of the multiple LED pixel in corresponding edge place of revise goal LED display unit.
Finally, the means for correcting of a kind of LED display unit that the embodiment of the present invention provides on the other hand, it comprises: Luminance Distribution corrected parameter generation module, for the Luminance Distribution corrected parameter utilizing the original brightness distributed data group of each LED display unit in M LED display unit to generate corresponding LED display unit, wherein M be greater than 1 natural number, and edge modifying factor computing module, for: (a) utilizes a described M LED display unit described Luminance Distribution corrected parameter separately to revise to obtain to revise bright chroma information to the described original brightness distributed data group in the bright chroma information of self gathered respectively and revises according to each correction coefficient that bright chroma information generates a described M LED display unit respectively, and the mean value of correction coefficient of the multiple LED pixel of each edge of multiple edges calculating a described M LED display unit is to obtain marginal correction coefficient mean value, the mean value correction coefficient mean value as a whole of the correction coefficient of multiple LED pixel in the appointed area calculating a described M LED display unit, and the ratio of the described Integral correction coefficient mean value the calculating a described M LED display unit described marginal correction coefficient mean value corresponding with each edge thus obtain described multiple edges of described M LED display unit edge modifying factor corresponding respectively, or (b) utilize a described M LED display unit described Luminance Distribution corrected parameter separately to revise to obtain described M LED display unit correction brightness distribution data group separately to respective described original brightness distributed data group respectively, and the mean value of the brightness data of each edge multiple LED pixel in described correction brightness distribution data group of multiple edges calculating a described M LED display unit obtaining edge brightness mean value, calculate the mean value of the brightness data of multiple LED pixel in described correction brightness distribution data group in the appointed area of described M LED display unit average brightness calculate the ratio of described edge brightness mean value corresponding to each edge of a described M LED display unit and described overall brightness mean value thus obtain described multiple edges of described M LED display unit edge modifying factor corresponding respectively as a whole.Wherein, described edge modifying factor is used for the correction coefficient of the multiple LED pixel in corresponding edge place of revise goal LED display unit.
Therefore, relative to prior art, the embodiment of the present invention generates public Luminance Distribution corrected parameter and/or edge modifying factor, can solve the LED display unit such as bright phaeodium of casing marginal existence by public Luminance Distribution corrected parameter and the phenomenon that cannot eliminate, when can solve LED display unit by edge modifying factor such as casing gathers, periphery does not have other casing luminance compensation to cause gathering the bright line problem after the lower splicing of brightness; Meanwhile, the efficiency that LED display unit corrects such as casing correction can also be improve.
By the detailed description below with reference to accompanying drawing, other side of the present invention and feature become obvious.But it should be known that this accompanying drawing is only the object design of explanation, instead of as the restriction of scope of the present invention, this is because it should with reference to additional claim.Should also be appreciated that, unless otherwise noted, unnecessaryly draw accompanying drawing to scale, they only try hard to structure described herein and flow process are described conceptually.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Fig. 1 is a kind of LED box correction system architecture schematic diagram that the embodiment of the present invention adopts.
Fig. 2 is the schematic flow sheet of the bearing calibration of a kind of LED box of first embodiment of the invention.
Fig. 3 is the schematic flow sheet of the bearing calibration of a kind of LED box of second embodiment of the invention.
Fig. 4 is the high-level schematic functional block diagram of the means for correcting of a kind of LED display unit of third embodiment of the invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
Refer to Fig. 1, its a kind of LED box correction system architecture schematic diagram adopted for the embodiment of the present invention.As shown in Figure 1, correcting computer 11 is such as connected by wired or wireless mode and LED display control program 13, and connects bright chroma collecting device 12.Wherein, correcting computer 10 is such as the PC or other computer equipments that are provided with correction software, and bright chroma collecting device 12 is such as gathering the camera of relative bright chroma information, the colorimeter gathering absolute bright chroma information or its combination.[correction] in the present embodiment is divided into gamma correction and chromaticity correction two kinds, and gamma correction refers to the correction of simple brightness aspect, and chromaticity correction refers to that brightness and colourity all correct.LED display control program 13 generally includes host computer such as PC and slave computer display control program, and slave computer display control program generally includes sending card and sending card and the receiving card be configured in LED box 20 or the control card with similar functions are connected.In addition, LED box 20 can be monochromatic LED casing, dual-colored LED or all-colour LED casing, is not described in detail in this.In addition, it is worth mentioning that, because receiving card normally independently circuit module, those skilled in the art have part receiving card being thought LED box 20, also have the ingredient thinking slave computer display control program, and what is specially, and this is not restricted.
Refer to Fig. 2, the schematic flow sheet of the bearing calibration of its a kind of LED box provided for first embodiment of the invention.Be described in detail as follows below in conjunction with the step of Fig. 1 and Fig. 2 to the bearing calibration that first embodiment of the invention provides:
S21: gather the bright chroma information of N number of LED box and carry out the brightness distribution data group that analyzing and processing obtains N number of LED box, N be greater than 1 natural number.Wherein, the bright chroma information of N number of LED box such as comprises the absolute bright chroma information that the colorimeter in the relative bright chroma information of the collected by camera in bright chroma collecting device 12 and bright chroma collecting device 12 gathers; The brightness distribution data group of relevant LED pixel position (such as ranks coordinate) can be obtained afterwards by existing zone location and point location technology, the Colour data group of relevant LED pixel position can certainly be obtained; Wherein, brightness distribution data group comprises and LED pixel position brightness data one to one.In addition, due to brightness distribution data group be herein usually the bright chroma information gathered is analyzed and obtain and also do not revise, for ease of illustrating, referred to herein as original brightness distributed data group.
S22: select M LED box according to pre-conditioned from N number of LED box, wherein M be greater than 1 natural number and M≤N.Wherein, according to the pre-conditioned concrete methods of realizing selecting M LED box from N number of LED box can be: first, calculate the average brightness of each LED pixel of each LED box in N number of LED box and the overall brightness mean value of N number of LED box, then the difference rejecting average brightness and overall brightness mean value in N number of LED box exceeds the LED box of preset range (such as 5% luminance difference), thus selects a described M LED box; In brief, then the bright dark difference calculating N number of LED box exactly reject non-compliant LED box i, and after rejecting, the number of LED box is M=N-i; Wherein i >=0.Certainly, also additive method can be adopted to choose standard compliant LED box, such as by analyzing the brightness data in the brightness distribution data group of each LED box, rejecting the LED box with obvious bright phaeodium, obtaining a standard compliant M LED box whereby.
S23: utilize the original brightness distributed data group of each LED box in M LED box to generate the Luminance Distribution corrected parameter LumParam of corresponding LED box.Wherein, the generation method of Luminance Distribution corrected parameter LumParam can adopt the method for existing various Usual Curved Surfaces matching or curved surface modeling, is not described in detail in this; In addition, in the present embodiment, the Luminance Distribution corrected parameter LumParam of each LED box is one group of constant, and the Luminance Distribution corrected parameter LumParam of different LED box may be different.
S24: utilize the Luminance Distribution corrected parameter LumParam of each LED box in M LED box to carry out the brightness distribution data group AvgLum1 that inverse obtains the inverse of corresponding LED box, AvgLum2 ... AvgLumM.
S25: to the brightness distribution data group AvgLum1 of the inverse of M LED box, AvgLum2 ... AvgLumM is averaged the mean flow rate distributed data group AvgLum that obtains M LED box utilize mean flow rate distributed data group AvgLum to generate the public Luminance Distribution corrected parameter PublicLumParam of M LED display unit.Wherein, mean flow rate distributed data group AvgLum=(AvgLum1+AvgLum2+ ... + AvgLumM), public Luminance Distribution corrected parameter PublicLumParam can utilize the method for existing various Usual Curved Surfaces matching or curved surface modeling to calculate according to mean flow rate distributed data group AvgLum.The public Luminance Distribution corrected parameter PublicLumParam herein calculated may be used for the brightness correction of a described M LED box, also to may be used for outside a described M LED box and to have other LED box of same size specification, to eliminate bright phaeodium phenomenon.
S26: after step S23, utilizes M LED box Luminance Distribution corrected parameter LumParam separately to revise to obtain revising bright chroma information and generating described M LED box correction coefficient separately respectively according to M LED box correction bright chroma information separately to the original brightness distributed data group in the bright chroma information of self gathered respectively.Wherein, carrying out brightness correction to original brightness distributed data group can in the following way: suppose that the brightness value of any one LED box in M LED box is L [i, j], Luminance Distribution corrected parameter is LumParam, one group of brightness value L c [i is calculated by Luminance Distribution corrected parameter LumParam, j] and calculate Lc [i, j] average LcAvg, note brightness value L [i, j] through revised brightness value be Lb [i, j], so according to formula L [i, j]/Lc [i, j]=Lb [i, j]/LcAvg, revised brightness value L b [i can be obtained, j]=L [i, j] * LcAvg/Lc [i, j], wherein i, j are the ranks number of LED pixel.Generating the correction coefficient of LED box as utilizing bright chroma information is prior art, does not repeat them here.
S27: calculate the mean value of the correction coefficient of the multiple LED pixel of each edge of multiple edges of M LED box to obtain marginal correction coefficient mean value, the mean value correction coefficient mean value as a whole of the correction coefficient of multiple LED pixel in the appointed area of calculating M LED display unit, and the ratio of the Integral correction coefficient mean value calculating M the LED display unit marginal correction coefficient mean value corresponding with each edge thus obtain described multiple edges of M LED display unit edge modifying factor corresponding respectively.Particularly, with the LED pixel in LED box for matrix arrangement and single led pixel comprises R, G, B LED point is example, the correction coefficient generated by step S26 calculates in each LED box respectively, under, left, the correction coefficient RGB principal component mean value separately that the correction coefficient RGB principal component mean value separately of each edge multiple LED pixel at right four side edge place is all designated as multiple LED pixel in EdgeAvgCoef and M casing appointed area is all designated as AvgCoef, carry out calculating each edge's RGB principal component edge modifying factor EdgeRatio separately, computing formula is: EdgeRatio=AvgCoef/EdgeAvgCoef.In the present embodiment, the multiple LED pixel of upper and lower edge respectively can Shi edge a line or multirow LED pixel, and the multiple LED pixel of left and right edge can Shi edge one arrange or multiple row LED pixel respectively; The multiple pixel in appointed area can be the LED pixel in whole viewing areas of each LED box, also can be each LED box edge unless each beyond the LED pixel of other viewing areas, this is not restricted.
After obtaining public Luminance Distribution corrected parameter PublicLumParam and edge modifying factor EdgeRatio by each step above-mentioned, can be respectively used to revise the brightness data of target LED box and the correction coefficient of each edge is revised.Wherein, when carrying out brightness correction, public Luminance Distribution corrected parameter PublicLumParam can be utilized to revise to obtain revising bright chroma information to the original brightness distributed data in the bright chroma information of the target LED box gathered, afterwards can according to the correction coefficient revising bright chroma information generation target LED box.When carrying out edge's correction coefficient correction, the correction coefficient of the multiple LED pixel in the corresponding edge place of the edge modifying factor EdgeRatio of each edge to target LED box can be utilized to revise, and the target LED box of carrying out edge's correction coefficient correction can be the LED box of not carrying out aforementioned brightness correction, the LED box of aforementioned brightness correction also can be carried out; From another angle, only can carry out brightness correction for target LED box, also can only carry out edge's correction coefficient correction, can also be both revise.In addition, the target LED box of the present embodiment can be any one in an aforementioned M LED box, also can be outside an aforementioned M LED box but has the LED box of same size specification with a described M LED box.Moreover, by after the target correction coefficient of target LED box that obtains after above-mentioned brightness correction and/or edge's correction coefficient correction, the target correction coefficient of acquisition can be uploaded to receiving card or the similar functions control card of the configuration of target LED box.
Refer to Fig. 3, the schematic flow sheet of the bearing calibration of its a kind of LED box provided for second embodiment of the invention.Be described in detail as follows below in conjunction with Fig. 1 and Fig. 3 to the bearing calibration that second embodiment of the invention provides:
S31: gather the bright chroma information of N number of LED box and carry out the brightness distribution data group that analyzing and processing obtains N number of LED box, N be greater than 1 natural number.Wherein, the bright chroma information of N number of LED box such as comprises the absolute bright chroma information that the colorimeter in the relative bright chroma information of the collected by camera in bright chroma collecting device 12 and bright chroma collecting device 12 gathers; The brightness distribution data group of relevant LED pixel position (such as ranks coordinate) can be obtained afterwards by existing zone location and point location technology, the Colour data group of relevant LED pixel position can certainly be obtained; Wherein, brightness distribution data group comprises and LED pixel position brightness data one to one.In addition, due to brightness distribution data group be herein usually the bright chroma information gathered is analyzed and obtain and also do not revise, for ease of illustrating, referred to herein as original brightness distributed data group.
S32: select M LED box according to pre-conditioned from N number of LED box, wherein M be greater than 1 natural number and M≤N.Wherein, according to the pre-conditioned concrete methods of realizing selecting M LED box from N number of LED box can be: first, calculate the average brightness of each LED pixel of each LED box in N number of LED box and the overall brightness mean value of N number of LED box, then the difference rejecting average brightness and overall brightness mean value in N number of LED box exceeds the LED box of preset range (such as 5% luminance difference), thus selects a described M LED box; In brief, then the bright dark difference calculating N number of LED box exactly reject non-compliant LED box i, and after rejecting, the number of LED box is M=N-i; Wherein i >=0.Certainly, also additive method can be adopted to choose standard compliant LED box, such as by analyzing the brightness data in the brightness distribution data group of each LED box, rejecting the LED box with obvious bright phaeodium, obtaining a standard compliant M LED box whereby.
S33: utilize the original brightness distributed data group of each LED box in M LED box to generate the Luminance Distribution corrected parameter LumParam of corresponding LED box.Wherein, the generation method of Luminance Distribution corrected parameter LumParam can adopt the method for existing various Usual Curved Surfaces matching or curved surface modeling, is not described in detail in this; In addition, in the present embodiment, the Luminance Distribution corrected parameter LumParam of each LED box is one group of constant, and the Luminance Distribution corrected parameter LumParam of different LED box may be different.
S34: utilize M LED box Luminance Distribution corrected parameter LumParam separately to revise to obtain described M LED box correction brightness distribution data group separately to respective original brightness distributed data group respectively.Wherein, carrying out brightness correction to original brightness distributed data group can in the following way: suppose that the brightness value of any one LED box in M LED box is L [i, j], Luminance Distribution corrected parameter is LumParam, one group of brightness value L c [i is calculated by Luminance Distribution corrected parameter LumParam, j] and calculate Lc [i, j] average LcAvg, note brightness value L [i, j] through revised brightness value be Lb [i, j], so according to formula L [i, j]/Lc [i, j]=Lb [i, j]/LcAvg, revised brightness value L b [i can be obtained, j]=L [i, j] * LcAvg/Lc [i, j], wherein i, j are the ranks number of LED pixel.
S35: the multiple LED pixel of each edge calculating multiple edges of M LED box is revising the mean value of the brightness data in brightness distribution data group to obtain edge brightness mean value, in the appointed area calculating a described M LED box, multiple LED pixel revises the mean value average brightness as a whole of the brightness data in brightness distribution data group at each, and the ratio of edge brightness mean value corresponding to each edge calculating a described M LED box and overall brightness mean value thus obtain multiple edges of M LED box edge modifying factor corresponding respectively.Particularly, with the LED pixel in LED box for matrix arrangement and single led pixel comprises R, G, B LED point is example, the correction brightness distribution data group generated by step S34 calculates in each LED box respectively, under, left, each edge multiple LED pixel at right four side edge place is all designated as multiple LED pixel in EdgeLumAvg and M casing appointed area at the mean value of each brightness data revised in brightness distribution data group and is all designated as LumAvg at the mean value of each brightness data revised in brightness distribution data group, carry out the edge modifying factor EdgeRatio calculating each edge, computing formula is: EdgeRatio=EdgeRatio=EdgeLumAvg/LumAvg.In the present embodiment, the multiple LED pixel of upper and lower edge respectively can Shi edge a line or multirow LED pixel, and the multiple LED pixel of left and right edge can Shi edge one arrange or multiple row LED pixel respectively; The multiple pixel in appointed area can be the LED pixel in whole viewing areas of each LED box, also can be each LED box edge unless each beyond the LED pixel of other viewing areas, this is not restricted.
After the edge modifying factor EdgeRatio obtaining each edge, the correction coefficient of edge modifying factor EdgeRatio to the edge LED pixel of target LED box can be utilized to carry out correction and to obtain target correction coefficient, the target correction coefficient of target LED box can be uploaded to receiving card or the similar functions control card of target LED box configuration afterwards.
Below in the first and second embodiment, also can omit the step selecting M LED box from N number of LED box, also namely not make LED box and reject step; In addition, calibration object is also not limited to LED box, also can be other LED display units, such as LED lamp panel.
Refer to Fig. 4, the high-level schematic functional block diagram of the means for correcting of its a kind of LED display unit provided for third embodiment of the invention.In the diagram, means for correcting 40 comprises Luminance Distribution corrected parameter generation module 41, the brightness distribution data group computing module 43 of inverse, public Luminance Distribution corrected parameter generation module 45 and edge modifying factor computing module 47; Can be software module at this modules 41,43,45 and 47, it to be such as stored in the storer of the correcting computer 11 shown in Fig. 1 and to be performed the corresponding steps realized in bearing calibration by the processor in correcting computer 11.
Particularly, Luminance Distribution corrected parameter generation module 41 is such as performing step S23 or S33, the brightness distribution data group computing module 43 of inverse is such as performing step S24, public Luminance Distribution corrected parameter generation module 45 is such as performing step S25, and edge modifying factor computing module 47 is such as performing step S26 and S27 or S34 and S35; The detail of each step please refer to first and second embodiment aforementioned, does not repeat them here.Be understandable that, in other embodiments, the means for correcting of LED display unit of the present invention can not be configured with edge modifying factor computing module 47, or only configures Luminance Distribution corrected parameter generation module 41 and edge modifying factor computing module 47 and do not configure the brightness distribution data group computing module 43 of inverse and public Luminance Distribution corrected parameter generation module 45.
In sum, the above embodiment of the present invention generates public Luminance Distribution corrected parameter and/or edge modifying factor, can solve the LED display unit such as bright phaeodium of casing marginal existence by public Luminance Distribution corrected parameter and the phenomenon that cannot eliminate, when can solve LED display unit by edge modifying factor such as casing gathers, periphery does not have other casing luminance compensation to cause gathering the bright line problem after the lower splicing of brightness; Meanwhile, the efficiency that LED display unit corrects such as casing correction can also be improve.
So far, apply specific case herein and set forth the bearing calibration of LED display unit of the present invention and the principle of means for correcting and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, 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 (12)
1. a bearing calibration for LED display unit, is characterized in that, comprises step:
(X1) utilize the original brightness distributed data group of each LED display unit in M LED display unit to generate the Luminance Distribution corrected parameter of corresponding LED display unit, wherein M be greater than 1 natural number;
(X2) the described Luminance Distribution corrected parameter of each LED display unit in a described M LED display unit is utilized to carry out the brightness distribution data group that inverse obtains the inverse of corresponding LED display unit;
(X3) the brightness distribution data group of the described inverse of a described M LED display unit is averaged the mean flow rate distributed data group that obtains a described M LED display unit utilize described mean flow rate distributed data group to generate the public Luminance Distribution corrected parameter of a described M LED display unit; And
(X4) described public Luminance Distribution corrected parameter is utilized to revise to obtain the first correction bright chroma information to the original brightness distributed data in the bright chroma information of the target LED display unit gathered and revise according to first the correction coefficient that bright chroma information generates described target LED display unit.
2. bearing calibration as claimed in claim 1, is characterized in that, also comprise step:
Gather the bright chroma information of N number of LED display unit and obtain the described original brightness distributed data group of each LED display unit in described N number of LED display unit, wherein N be greater than 1 natural number; And
From described N number of LED display unit, a described M LED display unit is selected, wherein M≤N according to pre-conditioned.
3. bearing calibration as claimed in claim 1, is characterized in that, in step (X1), described original brightness distributed data group comprises multiple with LED pixel position brightness data one to one.
4. bearing calibration as claimed in claim 2, is characterized in that, describedly comprises according to the pre-conditioned step selecting a described M LED display unit from described N number of LED display unit:
Calculate the average brightness of each LED pixel of each LED display unit in described N number of LED display unit and the overall brightness mean value of described N number of LED display unit; And
The difference rejecting average brightness and described overall brightness mean value described in described N number of LED display unit exceeds the LED display unit of preset range, thus selects a described M LED display unit.
5. bearing calibration as claimed in claim 1, is characterized in that, also comprise step:
Utilize a described M LED display unit described Luminance Distribution corrected parameter separately to revise to obtain the second correction bright chroma information to the described original brightness distributed data group in the bright chroma information of self gathered respectively and second revise the correction coefficient that bright chroma information generates a described M LED display unit respectively according to each;
Calculate the mean value of the correction coefficient of the multiple LED pixel of each edge of multiple edges of a described M LED display unit to obtain marginal correction coefficient mean value, the mean value correction coefficient mean value as a whole of the correction coefficient of multiple LED pixel in the appointed area calculating a described M LED display unit, and the ratio of the described Integral correction coefficient mean value the calculating a described M LED display unit described marginal correction coefficient mean value corresponding with each edge thus obtain described multiple edges of described M LED display unit edge modifying factor corresponding respectively, and
The correction coefficient of the multiple LED pixel in the corresponding edge place of described edge modifying factor to described target LED display unit is utilized to revise.
6. a bearing calibration for LED display unit, is characterized in that, comprises step:
(Y1) utilize the original brightness distributed data group of each LED display unit in M LED display unit to generate the Luminance Distribution corrected parameter of corresponding LED display unit, wherein M be greater than 1 natural number;
(Y2) a described M LED display unit described Luminance Distribution corrected parameter is separately utilized to revise to obtain revising bright chroma information to the described original brightness distributed data group in the bright chroma information of self gathered and revise according to each correction coefficient that bright chroma information generates a described M LED display unit respectively respectively;
(Y3) mean value of the correction coefficient of the multiple LED pixel of each edge of multiple edges of a described M LED display unit is calculated to obtain marginal correction coefficient mean value, the mean value correction coefficient mean value as a whole of the correction coefficient of multiple LED pixel in the appointed area calculating a described M LED display unit, and the ratio of the described Integral correction coefficient mean value the calculating a described M LED display unit described marginal correction coefficient mean value corresponding with each edge thus obtain described multiple edges of described M LED display unit edge modifying factor corresponding respectively, and
(Y4) correction coefficient of the multiple LED pixel in the corresponding edge place of described edge modifying factor to target LED display unit is utilized to revise.
7. bearing calibration as claimed in claim 6, it is characterized in that, in step (Y3), the appointed area of a described M LED display unit is the viewing area in whole viewing area of each LED display unit or each LED display unit except the viewing area of described multiple edge.
8. a bearing calibration for LED display unit, is characterized in that, comprises step:
(Z1) utilize the original brightness distributed data group of each LED display unit in M LED display unit to generate the Luminance Distribution corrected parameter of corresponding LED display unit, wherein M be greater than 1 natural number;
(Z2) a described M LED display unit described Luminance Distribution corrected parameter is separately utilized to revise to obtain described M LED display unit correction brightness distribution data group separately to respective described original brightness distributed data group respectively;
(Z3) mean value of the brightness data of each edge multiple LED pixel in described correction brightness distribution data group of multiple edges of a described M LED display unit is calculated to obtain edge brightness mean value, the mean value average brightness as a whole of the brightness data of multiple LED pixel in described correction brightness distribution data group in the appointed area calculating a described M LED display unit, and the ratio of described edge brightness mean value corresponding to each edge calculating a described M LED display unit and described overall brightness mean value thus obtain described multiple edges of described M LED display unit edge modifying factor corresponding respectively, and
(Z4) correction coefficient of the multiple LED pixel in the corresponding edge place of described edge modifying factor to target LED display unit is utilized to revise.
9. bearing calibration as claimed in claim 8, is characterized in that, also comprise step:
The described Luminance Distribution corrected parameter of each LED display unit in a described M LED display unit is utilized to carry out the brightness distribution data group that inverse obtains the inverse of corresponding LED display unit;
The brightness distribution data group of the described inverse of a described M LED display unit is averaged the mean flow rate distributed data group that obtains a described M LED display unit utilize described mean flow rate distributed data group to generate the public Luminance Distribution corrected parameter of a described M LED display unit; And
Described public Luminance Distribution corrected parameter is utilized to revise to obtain revising bright chroma information to the original brightness distributed data group in the bright chroma information of the target LED display unit gathered and generate the correction coefficient of described target LED display unit according to correction bright chroma information.
10. a means for correcting for LED display unit, is characterized in that, comprising:
Luminance Distribution corrected parameter generation module, for the Luminance Distribution corrected parameter utilizing the original brightness distributed data group of each LED display unit in M LED display unit to generate corresponding LED display unit, wherein M be greater than 1 natural number;
The brightness distribution data group computing module of inverse, carries out for utilizing the described Luminance Distribution corrected parameter of each LED display unit in a described M LED display unit brightness distribution data group that inverse obtains the inverse of corresponding LED display unit;
Public Luminance Distribution corrected parameter generation module, the brightness distribution data group for the described inverse to a described M LED display unit is averaged the mean flow rate distributed data group that obtains a described M LED display unit utilize described mean flow rate distributed data group to generate the public Luminance Distribution corrected parameter of a described M LED display unit; Wherein, described public Luminance Distribution corrected parameter is for revising the brightness data of the target LED display unit collected.
11. means for correctings as claimed in claim 10, is characterized in that, also comprise:
Edge modifying factor computing module, for:
A () utilizes a described M LED display unit described Luminance Distribution corrected parameter separately revise to obtain revising bright chroma information to the described original brightness distributed data group in the bright chroma information of self gathered and revise according to each correction coefficient that bright chroma information generates a described M LED display unit respectively respectively, and the mean value of correction coefficient of the multiple LED pixel of each edge of multiple edges calculating a described M LED display unit is to obtain marginal correction coefficient mean value, the mean value correction coefficient mean value as a whole of the correction coefficient of multiple LED pixel in the appointed area calculating a described M LED display unit, and the ratio of the described Integral correction coefficient mean value the calculating a described M LED display unit described marginal correction coefficient mean value corresponding with each edge thus obtain described multiple edges of described M LED display unit edge modifying factor corresponding respectively, or
B () utilizes a described M LED display unit described Luminance Distribution corrected parameter separately to revise to obtain described M LED display unit correction brightness distribution data group separately to respective described original brightness distributed data group respectively, and the mean value of the brightness data of each edge multiple LED pixel in described correction brightness distribution data group of multiple edges calculating a described M LED display unit is to obtain edge brightness mean value, the mean value average brightness as a whole of the brightness data of multiple LED pixel in described correction brightness distribution data group in the appointed area calculating a described M LED display unit, and the ratio of described edge brightness mean value corresponding to each edge calculating a described M LED display unit and described overall brightness mean value thus obtain described multiple edges of described M LED display unit edge modifying factor corresponding respectively,
Wherein, described edge modifying factor is used for the correction coefficient of the multiple LED pixel in corresponding edge place of revise goal LED display unit.
The means for correcting of 12. 1 kinds of LED display units, is characterized in that, comprising:
Luminance Distribution corrected parameter generation module, for the Luminance Distribution corrected parameter utilizing the original brightness distributed data group of each LED display unit in M LED display unit to generate corresponding LED display unit, wherein M be greater than 1 natural number; And
Edge modifying factor computing module, for:
A () utilizes a described M LED display unit described Luminance Distribution corrected parameter separately revise to obtain revising bright chroma information to the described original brightness distributed data group in the bright chroma information of self gathered and revise according to each correction coefficient that bright chroma information generates a described M LED display unit respectively respectively, and the mean value of correction coefficient of the multiple LED pixel of each edge of multiple edges calculating a described M LED display unit is to obtain marginal correction coefficient mean value, the mean value correction coefficient mean value as a whole of the correction coefficient of multiple LED pixel in the appointed area calculating a described M LED display unit, and the ratio of the described Integral correction coefficient mean value the calculating a described M LED display unit described marginal correction coefficient mean value corresponding with each edge thus obtain described multiple edges of described M LED display unit edge modifying factor corresponding respectively, or
B () utilizes a described M LED display unit described Luminance Distribution corrected parameter separately to revise to obtain described M LED display unit correction brightness distribution data group separately to respective described original brightness distributed data group respectively, and the mean value of the brightness data of each edge multiple LED pixel in described correction brightness distribution data group of multiple edges calculating a described M LED display unit is to obtain edge brightness mean value, the mean value average brightness as a whole of the brightness data of multiple LED pixel in described correction brightness distribution data group in the appointed area calculating a described M LED display unit, and the ratio of described edge brightness mean value corresponding to each edge calculating a described M LED display unit and described overall brightness mean value thus obtain described multiple edges of described M LED display unit edge modifying factor corresponding respectively,
Wherein, described edge modifying factor is used for the correction coefficient of the multiple LED pixel in corresponding edge place of revise goal LED display unit.
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