CN104464633B - The bearing calibration of LED display unit and means for correcting - Google Patents
The bearing calibration of LED display unit and means for correcting Download PDFInfo
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Abstract
Bearing calibration and means for correcting the present invention relates to LED display unit.The bearing calibration includes step：Respective Luminance Distribution corrected parameter is generated using the M respective original brightness distributed data group of LED display unit；The brightness distribution data group that inverse obtains respective inverse is carried out using the respective Luminance Distribution corrected parameter of the M LED display unit；Its mean flow rate distributed data group is averagely obtained to the brightness distribution data group of the inverse of the M LED display unit and public Luminance Distribution corrected parameter is generated using the mean flow rate distributed data group；And recycle revised bright chroma information to generate the correction coefficient of target LED display unit after being first modified to the brightness data in the bright chroma information of the target LED display unit for gathering using public Luminance Distribution corrected parameter.Therefore, the present invention can at least solve the problems, such as the bright phaeodium of casing marginal existence in the prior art and cannot eliminate.
Description
Technical field
The present invention relates to LED alignment techniques field, the bearing calibration of more particularly to a kind of LED display unit and a kind of LED
The means for correcting of display unit.
Background technology
The reasons such as the discreteness of discreteness, Decay Rate and circuit components due to LED, LED display is present
Brightness and the inconsistent phenomenon of colourity, severely impact display quality.In order to overcome LED display brightness, colourity heterogeneity
Problem, pointwise correction technology is arisen at the historic moment, and is quickly grown, and it can significantly increase the uniformity of LED display, improves aobvious
Show quality.
According to the difference of application scenario, pointwise correction technology can be divided into two kinds again：A kind of is by case school on production line
Just (also referred to as casing correction), another kind is large-size screen monitors correction (also referred to as straightened up in place) at scene.Straightened up in place technology can select to close
Suitable viewing place is corrected, it is ensured that LED display reaches satisfied display effect in applied environment at the scene, but complicated many
The site environment of change and strange land technical support are to limit the problem that straightened up in place faces；Especially some external order straightened up in places
Cost and difficulty all than larger.In order to ensure the uniformity of the LED display that dispatches from the factory, technical support cost, casing correction are reduced
Technology just embodies the peculiar value of oneself.Casing correction can significantly improve the display quality of LED display after splicing, and
It is higher with respect to straightened up in place efficiency, do not limited by time and place, cost is relatively low.
Therefore, with the development of LED display production firm, casing alignment technique will manufacture link as LED display
In an indispensable part, but current casing correction, there are some effect problems：For example after casing correction there is case
If there is bright phaeodium between body on splicing bright line problem, casing and this bright phaeodium place still can after box body splicing at edge
Captured by human eye.
The content of the invention
Therefore, exist to overcome the shortcomings of prior art, the present invention provide a kind of LED display unit bearing calibration and
A kind of means for correcting of LED display unit, is drawn with solving the bright line after box body splicing and/or solving the bright phaeodium of casing
The problem of bright phaeodium phenomenon is still can see after playing splicing, while improving the correction efficiency of casing correction.
Specifically, the bearing calibration of a kind of LED display unit that on the one hand embodiment of the present invention provides, it includes step：
A kind of bearing calibration of LED display unit, it is characterised in that including step：(X1) using each in M LED display unit
The Luminance Distribution corrected parameter of the original brightness distributed data group generation correspondence LED display unit of individual LED display unit, wherein M
It is the natural number more than 1；(X2) using the Luminance Distribution of each LED display unit in the M LED display unit
Corrected parameter carries out the brightness distribution data group that inverse obtains the inverse of correspondence LED display unit；(X3) it is aobvious to the M LED
Show that the brightness distribution data group of the inverse of unit is averagely obtained the mean flow rate distribution of the M LED display unit
Data group is simultaneously joined using the public Luminance Distribution amendment that the mean flow rate distributed data group generates the M LED display unit
Number；And in the bright chroma information of (X4) using the public Luminance Distribution corrected parameter to the target LED display unit for gathering
Original brightness distributed data be modified to obtain the first amendment bright chroma information and given birth to according to the first amendment bright chroma information
Into the correction coefficient of the target LED display unit.
In one embodiment of the invention, above-mentioned bearing calibration also includes step：Gather the bright of N number of LED display unit
Chrominance information simultaneously obtains the original brightness distributed data group of each LED display unit in N number of LED display unit,
Wherein N is the natural number more than 1；And the M LED is selected from N number of LED display unit show according to pre-conditioned
Unit, wherein M≤N.
In one embodiment of the invention, in above-mentioned steps (X1), the original brightness distributed data group includes multiple
With the one-to-one brightness data in LED pixel point position.
In one embodiment of the invention, it is above-mentioned according to it is pre-conditioned selected from N number of LED display unit described in
The step of M LED display unit, includes：Calculate each LED picture of each LED display unit in N number of LED display unit
The overall brightness average value of the average brightness of vegetarian refreshments and N number of LED display unit；And reject N number of LED displays list
Average brightness described in unit exceeds the LED display unit of preset range with the difference of the overall brightness average value, so as to select
Go out the M LED display unit.
In one embodiment of the invention, above-mentioned bearing calibration also includes step：The M LED is utilized respectively to show
The respective Luminance Distribution corrected parameter of unit is to the original brightness distribution number in the bright chroma information of itself of collection
Be modified according to group with obtain the second amendment bright chroma information and according to each second amendment bright chroma information generate respectively described in
The M correction coefficient of LED display unit；Each edge for calculating multiple edges of the M LED display unit is multiple
The average value of the correction coefficient of LED pixel point is obtaining marginal correction coefficient average value, calculate the M LED display unit
The average value of the correction coefficient of multiple LED pixel points is as Integral correction coefficient average value in designated area and calculates the M
The Integral correction coefficient average value marginal correction coefficient average value corresponding with each edge of LED display unit
Ratio distinguish corresponding edge modifying factor so as to obtain the multiple edge of the M LED display unit；And profit
The correction coefficient of multiple LED pixel points is entered at corresponding edge with the edge modifying factor to the target LED display unit
Row amendment.
Additionally, a kind of bearing calibration of LED display unit that on the other hand embodiment of the present invention provides, it includes step：
(Y1) shown using the original brightness distributed data group generation correspondence LED of each LED display unit in M LED display unit
Show the Luminance Distribution corrected parameter of unit, wherein M is the natural number more than 1；(Y2) it is utilized respectively the M LED display unit
The respective Luminance Distribution corrected parameter is to the original brightness distributed data group in the bright chroma information of itself of collection
It is modified to obtain amendment bright chroma information and generate the M LED displays respectively according to each amendment bright chroma information single
The correction coefficient of unit；(Y3) each edge multiple LED pixel of multiple edges of the M LED display unit is calculated
Designated area of the average value of the correction coefficient of point to obtain marginal correction coefficient average value, calculate the M LED display unit
The average value of the correction coefficient of interior multiple LED pixel points is as Integral correction coefficient average value and calculates the M LED and shows
The ratio of the Integral correction coefficient average value marginal correction coefficient average value corresponding with each edge of unit
So as to corresponding edge modifying factor is distinguished in the multiple edge for obtaining the M LED display unit；And (Y4) is utilized
The edge modifying factor is modified to the correction coefficient of multiple LED pixel points at the corresponding edge of target LED display unit.
In one embodiment of the invention, in above-mentioned steps (Y3), the designated area of the M LED display unit is
Except the display of the multiple edge in whole viewing areas of each LED display unit or each LED display unit
Viewing area outside region.
In addition, a kind of bearing calibration of LED display unit that embodiment of the present invention another further aspect is provided, it includes step：
(Z1) shown using the original brightness distributed data group generation correspondence LED of each LED display unit in M LED display unit
Show the Luminance Distribution corrected parameter of unit, wherein M is the natural number more than 1；(Z2) it is utilized respectively the M LED display unit
The respective Luminance Distribution corrected parameter is modified to obtain the M to the respective original brightness distributed data group
The respective amendment brightness distribution data group of LED display unit；(Z3) multiple edges of the M LED display unit are calculated
The average value of brightness data of each edge multiple LED pixel points in the amendment brightness distribution data group is obtaining side
Multiple LED pixel points are in the amendment brightness minute in edge average brightness, the designated area of the calculating M LED display unit
The average value of the brightness data in cloth data group is as overall brightness average value and calculates each of the M LED display unit
The corresponding edge brightness average value in individual edge is with the ratio of the overall brightness average value so as to obtain the M LED
Distinguish corresponding edge modifying factor in the multiple edge of display unit；And (Z4) utilizes the edge modifying factor pair
The correction coefficient of multiple LED pixel points is modified at the corresponding edge of target LED display unit.
In one embodiment of the invention, above-mentioned bearing calibration also includes step：Using the M LED display unit
In each LED display unit the Luminance Distribution corrected parameter carry out inverse obtain correspondence LED display unit inverse
Brightness distribution data group；Brightness distribution data group to the inverse of the M LED display unit is averagely obtained institute
State the M mean flow rate distributed data group of LED display unit and generated using the mean flow rate distributed data group described M
The public Luminance Distribution corrected parameter of LED display unit；And the utilization public Luminance Distribution corrected parameter is to the mesh of collection
Mark the original brightness distributed data group in the bright chroma information of LED display unit be modified with obtain amendment bright chroma information,
And the correction coefficient of the target LED display unit is generated according to amendment bright chroma information.
Furthermore, a kind of means for correcting of LED display unit that on the one hand embodiment of the present invention provides, it includes：Brightness point
Cloth corrected parameter generation module, for the original brightness distribution using each LED display unit in M LED display unit
The Luminance Distribution corrected parameter of data group generation correspondence LED display unit, wherein M is the natural number more than 1；The brightness of inverse point
Cloth data group computing module, for the brightness point using each LED display unit in the M LED display unit
Cloth corrected parameter carries out the brightness distribution data group that inverse obtains the inverse of correspondence LED display unit；And public Luminance Distribution
Corrected parameter generation module, the brightness distribution data group for the inverse to the M LED display unit averagely obtain
Described in the mean flow rate distributed data group of the M LED display unit and utilization mean flow rate distributed data group generation
The M public Luminance Distribution corrected parameter of LED display unit；Wherein, the public Luminance Distribution corrected parameter is adopted for amendment
The brightness data of the target LED display unit for collecting.
In one embodiment of the invention, above-mentioned means for correcting also includes：Edge modifying factor computing module, is used for：
A () is utilized respectively itself bright chroma of the respective Luminance Distribution corrected parameter of the M LED display unit to gathering and believes
The original brightness distributed data group in breath is modified to obtain amendment bright chroma information and correct bright chroma according to each
Information generates the correction coefficient of the M LED display unit respectively；And calculate multiple edges of the M LED display unit
The average value of the correction coefficient of each edge multiple LED pixel points located is to obtain marginal correction coefficient average value, calculating
The average value of the correction coefficient of multiple LED pixel points is used as Integral correction coefficient in the designated area of the M LED display unit
Average value simultaneously calculates the Integral correction coefficient average value institute corresponding with each edge of the M LED display unit
State the ratio of marginal correction coefficient average value and corresponded to respectively so as to obtain the multiple edge of the M LED display unit
Edge modifying factor；Or (b) is utilized respectively the respective Luminance Distribution corrected parameter pair of the M LED display unit
The respective original brightness distributed data group is modified to obtain the respective amendment brightness point of the M LED display unit
Cloth data group；And each edge multiple LED pixel points of multiple edges of the calculating M LED display unit exist
The average value of the brightness data in the amendment brightness distribution data group is obtaining edge brightness average value, calculate the M LED
The average value of brightness data of multiple LED pixel points in the amendment brightness distribution data group in the designated area of display unit
As overall brightness average value and calculate the M LED display unit the corresponding edge brightness in each edge put down
Average is distinguished with the ratio of the overall brightness average value so as to obtain the multiple edge of the M LED display unit
Corresponding edge modifying factor.Wherein, the edge modifying factor is used to correct many at the corresponding edge of target LED display unit
The correction coefficient of individual LED pixel point.
Finally, the means for correcting of a kind of LED display unit that on the other hand embodiment of the present invention provides, it includes：Brightness
Distribution corrected parameter generation module, for the original brightness point using each LED display unit in M LED display unit
The Luminance Distribution corrected parameter of cloth data group generation correspondence LED display unit, wherein M is the natural number more than 1；And edge is repaiied
Positive divisor computing module, is used for：A () is utilized respectively the respective Luminance Distribution corrected parameter pair of the M LED display unit
The original brightness distributed data group in the bright chroma information of itself of collection be modified with obtain amendment bright chroma information,
And generate the correction coefficient of the M LED display unit respectively according to each amendment bright chroma information；And calculate described M
The average value of the correction coefficient of each edge multiple LED pixel points of multiple edges of LED display unit is obtaining side
The correction coefficient of multiple LED pixel points in edge correction coefficient average value, the designated area of the calculating M LED display unit
Average value is as Integral correction coefficient average value and calculates the Integral correction coefficient average value of the M LED display unit
The ratio of the marginal correction coefficient average value corresponding with each edge is so as to obtain the M LED display unit
Distinguish corresponding edge modifying factor in the multiple edge；Or (b) to be utilized respectively the M LED display unit respective
The Luminance Distribution corrected parameter is modified to the respective original brightness distributed data group and is shown with obtaining the M LED
Show the respective amendment brightness distribution data group of unit；And each of multiple edges of the calculating M LED display unit
The average value of brightness data of the edge multiple LED pixel points in the amendment brightness distribution data group is obtaining edge brightness
Multiple LED pixel points are in the amendment brightness distribution data in average value, the designated area of the calculating M LED display unit
The average value of the brightness data in group is as overall brightness average value and calculates each edge of the M LED display unit
Locate the corresponding edge brightness average value single so as to obtain the M LED displays with the ratio of the overall brightness average value
Distinguish corresponding edge modifying factor in the multiple edge of unit.Wherein, the edge modifying factor is used to correct target LED
The correction coefficient of multiple LED pixel points at the corresponding edge of display unit.
Accordingly, with respect to prior art, the embodiment of the present invention generates public Luminance Distribution corrected parameter and/or edge amendment
The factor, the LED display unit such as bright phaeodium of casing marginal existence can be solved by public Luminance Distribution corrected parameter and cannot
The phenomenon of elimination, no other casings in periphery when LED display unit such as casing is gathered can be solved by edge modifying factor
Luminance compensation causes to gather the bright line problem existed after the relatively low splicing of brightness；At the same time it can also improve LED display unit school
The efficiency that just for example casing is corrected.
By the detailed description below with reference to accompanying drawing, other side of the invention and feature become obvious.But should know
Road, the accompanying drawing is only the purpose design explained, not as the restriction of the scope of the present invention, because it should refer to
Appended claims.It should also be noted that unless otherwise noted, it is not necessary to scale accompanying drawing, they only try hard to concept
Ground explanation structure described herein and flow.
Brief description of the drawings
Below in conjunction with accompanying drawing, specific embodiment of the 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 is used.
Fig. 2 is a kind of schematic flow sheet of the bearing calibration of LED box of first embodiment of the invention.
Fig. 3 is a kind of schematic flow sheet of the bearing calibration of LED box of second embodiment of the invention.
Fig. 4 is a kind of high-level schematic functional block diagram of the means for correcting of LED display unit of third embodiment of the invention.
Specific embodiment
To enable the above objects, features and advantages of the present invention more obvious understandable, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
Fig. 1 is referred to, it is a kind of LED box correction system architecture schematic diagram that the embodiment of the present invention is used.Such as Fig. 1
Shown, correcting computer 11 is for example set up with LED display control programs 13 by wired or wireless way and is connected, and connection light tone
Degree collecting device 12.Wherein, correcting computer 11 is, for example, the PC or other computer equipments for being provided with correction software, bright
Colourity collecting device 12 is, for example, the camera for gathering relatively bright chrominance information, the colorimeter or its group for gathering absolute bright chroma information
Close.In the present embodiment【Correction】It is divided into two kinds of gamma correction and chromaticity correction, gamma correction refers to the school in terms of simple brightness
Just, chromaticity correction refers to that brightness and colourity are corrected.LED display control programs 13 generally include host computer such as PC and bottom
Machine display control program, slave computer display control program generally includes sending card and sending card and configuration are in LED box 20
Receiving card or the control card with similar functions are connected.Additionally, LED box 20 can be monochromatic LED casing, dual-colored LED or
All-colour LED casing, will not be described in detail herein.In addition, it is noted that because receiving card be typically independent circuit module, this
Art personnel have the part that receiving card is considered LED box 20, also have and are considered slave computer display control program
Part, specially how this is not restricted.
Fig. 2 is referred to, a kind of flow of the bearing calibration of its LED box provided for first embodiment of the invention is illustrated
Figure.The step of bearing calibration provided first embodiment of the invention with reference to Fig. 1 and Fig. 2, is described in detail as follows：
S21：Gather the bright chroma information of N number of LED box and carry out the Luminance Distribution that analyzing and processing obtains N number of LED box
Data group, N is the natural number more than 1.Wherein, the bright chroma information of N number of LED box is for example including in bright chroma collecting device 12
Camera collection relatively bright chrominance information and bright chroma collecting device 12 in colorimeter collection absolute bright chroma information；It
The brightness of related LED pixel point position (such as ranks coordinate) can be obtained by existing zone location and point location technology afterwards
Distributed data group, naturally it is also possible to obtain the Colour data group of related LED pixel point position；Wherein, brightness distribution data
Group includes and the one-to-one brightness data in LED pixel point position.Further, since brightness distribution data group herein is usual
Also it is modified obtained from bright chroma information to gathering is analyzed and not, for purposes of illustration only, referred to herein as original
Brightness distribution data group.
S22：M LED box is selected from N number of LED box according to pre-conditioned, wherein M is the natural number and M more than 1
≤N.Wherein, the M concrete methods of realizing of LED box is selected from N number of LED box can be according to pre-conditioned：First, count
Calculate the average brightness and the overall brightness of N number of LED box of each LED pixel point of each LED box in N number of LED box
Average value, average brightness exceeds preset range (for example with the difference of overall brightness average value in then rejecting N number of LED box
5% luminance difference) LED box, so as to select the M LED box；It is simply that calculating the bright of N number of LED box
Then dark difference reject non-compliant LED box i, and the number of LED box is M=N-i after rejecting；Wherein i >=0.
It is of course also possible to use other method chooses standard compliant LED box, such as by the brightness to each LED box point
Brightness data in cloth data group is analyzed, and rejects the LED box with obvious bright phaeodium, standard compliant to obtain whereby
M LED box.
S23：Using the original brightness distributed data group generation correspondence LED casees of each LED box in M LED box
The Luminance Distribution corrected parameter LumParam of body.Wherein, the generation method of Luminance Distribution corrected parameter LumParam can be used
Existing various Usual Curved Surfaces fittings or the method for curved surface modeling, will not be described in detail herein；In addition, in the present embodiment, each LED
The Luminance Distribution corrected parameter LumParam of casing is one group of constant, the Luminance Distribution corrected parameter of different LED box
LumParam may be different.
S24：Inverse is carried out using the Luminance Distribution corrected parameter LumParam of each LED box in M LED box
Brightness distribution data group AvgLum1, the AvgLum2 of the inverse of correspondence LED box are obtained ... AvgLumM.
S25：To M brightness distribution data group AvgLum1, the AvgLum2 of the inverse of LED box ... AvgLumM is carried out
It is average to obtain the M mean flow rate distributed data group AvgLum of LED box and using mean flow rate distributed data group AvgLum lifes
Into the M public Luminance Distribution corrected parameter PublicLumParam of LED display unit.Wherein, mean flow rate distributed data group
AvgLum=(AvgLum1+AvgLum2+ ...+AvgLumM), public Luminance Distribution corrected parameter PublicLumParam can root
It is calculated using the method for existing various Usual Curved Surfaces fittings or curved surface modeling according to mean flow rate distributed data group AvgLum.
The public Luminance Distribution corrected parameter PublicLumParam being calculated herein can be used for the brightness of the M LED box
Amendment, it is also possible to for outside the M LED box and other LED boxes with same size specification, to eliminate bright phaeodium
Phenomenon.
S26：After step S23, M respective Luminance Distribution corrected parameter LumParam pairs of LED box is utilized respectively
Original brightness distributed data group in the bright chroma information of itself of collection is modified to obtain correcting bright chroma information and root
The respective correction coefficient of M LED box is generated respectively according to the M respective amendment bright chroma information of LED box.Wherein, it is right
Original brightness distributed data group carries out brightness correction can be in the following way：Assuming that any one the LED case in M LED box
The brightness value of body is L [i, j], and Luminance Distribution corrected parameter is LumParam, is counted by Luminance Distribution corrected parameter LumParam
Calculate one group of brightness value L c [i, j] and calculate the average LcAvg of Lc [i, j], the brightness value after note brightness value L [i, j] is corrected is
Lb [i, j], then according to formula L [i, j]/Lc [i, j]=Lb [i, j]/LcAvg, can obtain revised brightness value L b [i,
J]=L [i, j] * LcAvg/Lc [i, j]；Wherein i, j are the ranks number of LED pixel point.As for using bright chroma information generation LED
The correction coefficient of casing is prior art, be will not be repeated here.
S27：The correction coefficient of each edge multiple LED pixel points of M multiple edges of LED box of calculating
Average value is obtaining marginal correction coefficient average value, calculate multiple LED pixel points in the M designated area of LED display unit
The average value of correction coefficient as Integral correction coefficient average value and calculate M LED display unit Integral correction coefficient it is average
The ratio of value marginal correction coefficient average value corresponding with each edge is so as to obtain the described many of M LED display unit
Distinguish corresponding edge modifying factor in individual edge.Specifically, it is as matrix arrangement and single with the LED pixel point in LED box
LED pixel point includes as a example by R, G, B LED point that the correction coefficient generated by step S26 calculates each LED box respectively
The correction coefficient RGB principal component of each edge multiple LED pixel point at the four side edge of upper and lower, left and right is respective
Average value is designated as the correction coefficient RGB master minute of multiple LED pixel points in EdgeAvgCoef and M casing designated area
Measure respective average value and be designated as AvgCoef, carry out calculating each respective edge modifying factor of edge RGB principal component
EdgeRatio, computing formula is：EdgeRatio=AvgCoef/EdgeAvgCoef.In the present embodiment, upper and lower edge is more
Individual LED pixel point can be respectively most edge a line or multirow LED pixel point, left and right edge multiple LED pixel point difference
It can be most edge one or more columns per page LED pixel point；Designated area multiple pixel can be that the whole of each LED box shows
Show the LED of other viewing areas beyond the edge unless each of LED pixel point, or each LED box in region
Pixel, this is not restricted.
Public Luminance Distribution corrected parameter PublicLumParam and edge modifying factor are being obtained by above-mentioned each step
After sub- EdgeRatio, may be respectively used for being modified the brightness data of target LED box and each edge correction system
Number is modified.Wherein, when carrying out brightness correction, it is possible to use public Luminance Distribution corrected parameter PublicLumParam is to adopting
Original brightness distributed data in the bright chroma information of the target LED box of collection is modified to obtain correcting bright chroma information,
The correction coefficient of target LED box can be generated according to amendment bright chroma information afterwards.When carrying out edge correction coefficient amendment, can
Multiple LED pixel points at corresponding edge with the edge modifying factor EdgeRatio using each edge to target LED box
Correction coefficient be modified, and carry out the target LED box of edge correction coefficient amendment can be do not carry out it is foregoing bright
Spend the LED box of amendment, it is also possible to carried out the LED box of foregoing brightness correction；From for another angle, for mesh
Mark LED box can only carry out brightness correction, it is also possible to only carry out edge correction coefficient amendment, can also be and both repair
Just.In addition, the target LED box of the present embodiment can be any one, or foregoing M in foregoing M LED box
There is the LED box of same size specification outside LED box but with the M LED box.Furthermore, by above-mentioned brightness correction
And/or after the target correction coefficient of the target LED box obtained after the correction coefficient amendment of edge, the target school that will can be obtained
Positive coefficient is uploaded to the receiving card or similar functions control card of target LED box configuration.
Fig. 3 is referred to, a kind of flow of the bearing calibration of its LED box provided for second embodiment of the invention is illustrated
Figure.The bearing calibration that second embodiment of the invention is provided is described in detail with reference to Fig. 1 and Fig. 3 as follows：
S31：Gather the bright chroma information of N number of LED box and carry out the Luminance Distribution that analyzing and processing obtains N number of LED box
Data group, N is the natural number more than 1.Wherein, the bright chroma information of N number of LED box is for example including in bright chroma collecting device 12
Camera collection relatively bright chrominance information and bright chroma collecting device 12 in colorimeter collection absolute bright chroma information；It
The brightness of related LED pixel point position (such as ranks coordinate) can be obtained by existing zone location and point location technology afterwards
Distributed data group, naturally it is also possible to obtain the Colour data group of related LED pixel point position；Wherein, brightness distribution data
Group includes and the one-to-one brightness data in LED pixel point position.Further, since brightness distribution data group herein is usual
Also it is modified obtained from bright chroma information to gathering is analyzed and not, for purposes of illustration only, referred to herein as original
Brightness distribution data group.
S32：M LED box is selected from N number of LED box according to pre-conditioned, wherein M is the natural number and M more than 1
≤N.Wherein, the M concrete methods of realizing of LED box is selected from N number of LED box can be according to pre-conditioned：First, count
Calculate the average brightness and the overall brightness of N number of LED box of each LED pixel point of each LED box in N number of LED box
Average value, average brightness exceeds preset range (for example with the difference of overall brightness average value in then rejecting N number of LED box
5% luminance difference) LED box, so as to select the M LED box；It is simply that calculating the bright of N number of LED box
Then dark difference reject non-compliant LED box i, and the number of LED box is M=N-i after rejecting；Wherein i >=0.
It is of course also possible to use other method chooses standard compliant LED box, such as by the brightness to each LED box point
Brightness data in cloth data group is analyzed, and rejects the LED box with obvious bright phaeodium, standard compliant to obtain whereby
M LED box.
S33：Using the original brightness distributed data group generation correspondence LED casees of each LED box in M LED box
The Luminance Distribution corrected parameter LumParam of body.Wherein, the generation method of Luminance Distribution corrected parameter LumParam can be used
Existing various Usual Curved Surfaces fittings or the method for curved surface modeling, will not be described in detail herein；In addition, in the present embodiment, each LED
The Luminance Distribution corrected parameter LumParam of casing is one group of constant, the Luminance Distribution corrected parameter of different LED box
LumParam may be different.
S34：The M respective Luminance Distribution corrected parameter LumParam of LED box is utilized respectively to respective original brightness
Distributed data group is modified to obtain the respective amendment brightness distribution data group of the M LED box.Wherein, to original bright
Degree distributed data group carries out brightness correction can be in the following way：Assuming that any one LED box in M LED box is bright
Angle value is L [i, j], and Luminance Distribution corrected parameter is LumParam, and one group is calculated by Luminance Distribution corrected parameter LumParam
Brightness value L c [i, j] simultaneously calculates the average LcAvg of Lc [i, j], note brightness value L [i, j] be corrected after brightness value for Lb [i,
J], then according to formula L [i, j]/Lc [i, j]=Lb [i, j]/LcAvg, revised brightness value L b [i, j]=L can be obtained
[i,j]*LcAvg/Lc[i,j]；Wherein i, j are the ranks number of LED pixel point.
S35：M each edge multiple LED pixel point of multiple edges of LED box is calculated in amendment brightness minute
Designated area of the average value of the brightness data in cloth data group to obtain edge brightness average value, calculate the M LED box
The average value of brightness data of the interior multiple LED pixel points in each amendment brightness distribution data group is average as overall brightness
Value simultaneously calculates the corresponding edge brightness average value in each edge of the M LED box and the ratio of overall brightness average value
Value distinguishes corresponding edge modifying factor so as to obtain M multiple edges of LED box.Specifically, with LED box
LED pixel point is the amendment generated by step S34 as a example by matrix arrangement and single led pixel include R, G, B LED point
Brightness distribution data group calculates each edge multiple LED pictures at each LED box upper and lower, left and right four side edge respectively
The average value of brightness data of the vegetarian refreshments in each amendment brightness distribution data group is designated as EdgeLumAvg and M casing refers to
The average value for determining brightness data of multiple LED pixel points in each amendment brightness distribution data group in region is designated as
LumAvg, calculate the edge modifying factor EdgeRatio of each edge, and computing formula is：EdgeRatio=
EdgeRatio=EdgeLumAvg/LumAvg.In the present embodiment, upper and lower edge multiple LED pixel point can be respectively most
Edge a line or multirow LED pixel point, left and right edge multiple LED pixel point can be respectively that most edge one arranges or many
Row LED pixel point；Designated area multiple pixel can be the LED pixel point in whole viewing areas of each LED box,
Can be each LED box edge unless each beyond other viewing areas LED pixel point, this is not restricted.
After the edge modifying factor EdgeRatio for obtaining each edge, it is possible to use edge modifying factor
EdgeRatio is modified to the correction coefficient of the edge LED pixel point of target LED box and obtains target correction coefficient, it
The target correction coefficient of target LED box can be uploaded to receiving card or the similar functions control of the configuration of target LED box afterwards
Card.
Below in the first and second embodiment, it is also possible to omit from N number of LED box select M LED box the step of,
Namely do not make LED box rejecting step；Additionally, calibration object is also not necessarily limited to LED box, or other LED display units,
Such as LED lamp panel.
Fig. 4 is referred to, a kind of function mould of the means for correcting of its LED display unit provided for third embodiment of the invention
Block schematic diagram.In fig. 4, means for correcting 40 includes the brightness distribution data of Luminance Distribution corrected parameter generation module 41, inverse
Group computing module 43, public Luminance Distribution corrected parameter generation module 45 and edge modifying factor computing module 47；It is each herein
Individual module 41,43,45 and 47 can be software module, and it is for example stored in the memory of the correcting computer 11 shown in Fig. 1
And the corresponding steps in bearing calibration are realized by the computing device in correcting computer 11.
Specifically, Luminance Distribution corrected parameter generation module 41 is for example for performing step S23 or S33, the brightness of inverse
Distributed data group computing module 43 for example for performing step S24, for example use by public Luminance Distribution corrected parameter generation module 45
In step S25 is performed, edge modifying factor computing module 47 is for example for performing step S26 and S27 or S34 and S35；Each
The detail of step refer to foregoing first and second embodiment, will not be repeated here.It is understood that in other implementations
In example, the means for correcting of LED display unit of the invention can be not configured with edge modifying factor computing module 47, or only match somebody with somebody
Luminance Distribution corrected parameter generation module 41 and edge modifying factor computing module 47 are put without configuring the Luminance Distribution number of inverse
According to group computing module 43 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, leads to
Crossing public Luminance Distribution corrected parameter can solve the LED display unit such as bright phaeodium of casing marginal existence and showing for cannot eliminating
As no other casing luminance compensations in periphery when LED display unit such as casing is gathered can be solved by edge modifying factor
Cause to gather the bright line problem existed after the relatively low splicing of brightness；At the same time it can also improve LED display unit correction such as case
The positive efficiency of sports school.
So far, specific case used herein is to the bearing calibration of LED display unit of the present invention and the original of means for correcting
Reason and implementation method are set forth, and the explanation of above example is only intended to help and understands that the method for the present invention and its core are thought
Think；Simultaneously for those of ordinary skill in the art, according to thought of the invention, in specific embodiments and applications
Will change, in sum, this specification content should not be construed as limiting the invention, protection scope of the present invention
Should be defined by appended claim.
Claims (11)
1. a kind of bearing calibration of LED display unit, it is characterised in that including step：
(X1) using the original brightness distributed data group generation correspondence of each LED display unit in M LED display unit
The Luminance Distribution corrected parameter of LED display unit, wherein M is the natural number more than 1；
(X2) carried out using the Luminance Distribution corrected parameter of each LED display unit in the M LED display unit
Inverse obtains the brightness distribution data group of the inverse of correspondence LED display unit；
(X3) the brightness distribution data group to the inverse of the M LED display unit is averagely obtained the M LED
The mean flow rate distributed data group of display unit simultaneously generates the M LED displays list using the mean flow rate distributed data group
The public Luminance Distribution corrected parameter of unit；And
(X4) original in the bright chroma information using the public Luminance Distribution corrected parameter to the target LED display unit for gathering
Beginning brightness distribution data is modified to obtain the first amendment bright chroma information and generate institute according to the first amendment bright chroma information
State the correction coefficient of target LED display unit.
2. bearing calibration as claimed in claim 1, it is characterised in that also including step：
Gather the bright chroma information of N number of LED display unit and obtain each LED display unit in N number of LED display unit
The original brightness distributed data group, wherein N is the natural number more than 1；And
The M LED display unit, wherein M≤N are selected from N number of LED display unit according to pre-conditioned.
3. bearing calibration as claimed in claim 1, it is characterised in that in step (X1), the original brightness distributed data
Group includes the multiple and one-to-one brightness data in LED pixel point position.
4. bearing calibration as claimed in claim 2, it is characterised in that described according to pre-conditioned single from N number of LED displays
The step of M LED display unit is selected in unit includes：
Calculate average brightness and the institute of each LED pixel point of each LED display unit in N number of LED display unit
State the overall brightness average value of N number of LED display unit；And
Average brightness described in N number of LED display unit is rejected with the difference of the overall brightness average value beyond default
The LED display unit of scope, so as to select the M LED display unit.
5. bearing calibration as claimed in claim 1, it is characterised in that also including step：
It is utilized respectively itself bright chroma of the respective Luminance Distribution corrected parameter of the M LED display unit to collection
The original brightness distributed data group in information be modified with obtain the second amendment bright chroma information and according to each second
Amendment bright chroma information generates the correction coefficient of the M LED display unit respectively；
Calculate the correction coefficient of each edge multiple LED pixel point of multiple edges of the M LED display unit
Average value is obtaining marginal correction coefficient average value, calculate multiple LED pixels in the designated area of the M LED display unit
The average value of the correction coefficient of point is as Integral correction coefficient average value and calculates the entirety of the M LED display unit
The ratio of the correction coefficient average value marginal correction coefficient average value corresponding with each edge is so as to obtain the M
Distinguish corresponding edge modifying factor in the multiple edge of LED display unit；And
The correction of multiple LED pixel points at corresponding edge using the edge modifying factor to the target LED display unit
Coefficient is modified.
6. a kind of bearing calibration of LED display unit, it is characterised in that including step：
(Y1) using the original brightness distributed data group generation correspondence of each LED display unit in M LED display unit
The Luminance Distribution corrected parameter of LED display unit, wherein M is the natural number more than 1；
(Y2) it is utilized respectively itself bright of the respective Luminance Distribution corrected parameter of the M LED display unit to collection
The original brightness distributed data group in chrominance information is modified to obtain amendment bright chroma information and corrected according to each
Bright chroma information generates the correction coefficient of the M LED display unit respectively；
(Y3) the correction system of each edge multiple LED pixel point of multiple edges of the M LED display unit is calculated
Several average value is obtaining marginal correction coefficient average value, calculate multiple LED in the designated area of the M LED display unit
The average value of the correction coefficient of pixel is as Integral correction coefficient average value and calculates described in the M LED display unit
The ratio of the Integral correction coefficient average value marginal correction coefficient average value corresponding with each edge is so as to obtain
State the M the multiple edge of LED display unit and distinguish corresponding edge modifying factor, wherein, the M LED displays are single
The designated area of unit be each LED display unit whole viewing areas or each LED display unit in except described many
Viewing area outside the viewing area of individual edge；And
(Y4) correction using the edge modifying factor to multiple LED pixel points at the corresponding edge of target LED display unit
Coefficient is modified.
7. a kind of bearing calibration of LED display unit, it is characterised in that including step：
(Z1) using the original brightness distributed data group generation correspondence of each LED display unit in M LED display unit
The Luminance Distribution corrected parameter of LED display unit, wherein M is the natural number more than 1；
(Z2) the respective Luminance Distribution corrected parameter of the M LED display unit is utilized respectively to respective described original
Brightness distribution data group is modified to obtain the respective amendment brightness distribution data group of the M LED display unit；
(Z3) each edge multiple LED pixel point for calculating multiple edges of the M LED display unit is repaiied described
The average value of the brightness data in positive brightness distribution data group shows single to obtain edge brightness average value, calculate the M LED
The average value of brightness data of multiple LED pixel points in the amendment brightness distribution data group is used as whole in the designated area of unit
Body average brightness and calculate the corresponding edge brightness average value in each edge of the M LED display unit with
The ratio of the overall brightness average value distinguishes corresponding so as to obtain the multiple edge of the M LED display unit
Edge modifying factor；And
(Z4) correction using the edge modifying factor to multiple LED pixel points at the corresponding edge of target LED display unit
Coefficient is modified.
8. bearing calibration as claimed in claim 7, it is characterised in that also including step：
Inverse is carried out using the Luminance Distribution corrected parameter of each LED display unit in the M LED display unit
Obtain the brightness distribution data group of the inverse of correspondence LED display unit；
The M LED is averagely obtained to the brightness distribution data group of the inverse of the M LED display unit to show
The mean flow rate distributed data group of unit simultaneously generates the M LED display unit using the mean flow rate distributed data group
Public Luminance Distribution corrected parameter；And
It is original bright in bright chroma information using the public Luminance Distribution corrected parameter to the target LED display unit for gathering
Degree distributed data group is modified to obtain amendment bright chroma information and generate the target LED according to amendment bright chroma information
The correction coefficient of display unit.
9. a kind of means for correcting of LED display unit, it is characterised in that including：
Luminance Distribution corrected parameter generation module, for the original using each LED display unit in M LED display unit
The Luminance Distribution corrected parameter of beginning brightness distribution data group generation correspondence LED display unit, wherein M is the natural number more than 1；
The brightness distribution data group computing module of inverse, for being shown using each LED in the M LED display unit
The Luminance Distribution corrected parameter of unit carries out the brightness distribution data group that inverse obtains the inverse of correspondence LED display unit；
Public Luminance Distribution corrected parameter generation module, for the Luminance Distribution of the inverse to the M LED display unit
Data group is averagely obtained the mean flow rate distributed data group of the M LED display unit and using the mean flow rate point
Cloth data group generates the public Luminance Distribution corrected parameter of the M LED display unit；Wherein, the public Luminance Distribution is repaiied
Positive parameter is used to correct the brightness data of the target LED display unit for collecting.
10. means for correcting as claimed in claim 9, it is characterised in that also include：
Edge modifying factor computing module, is used for：
A () is utilized respectively itself light tone of the respective Luminance Distribution corrected parameter of the M LED display unit to collection
The original brightness distributed data group in degree information is modified to obtain amendment bright chroma information and bright according to each amendment
Chrominance information generates the correction coefficient of the M LED display unit respectively；And calculate the multiple of the M LED display unit
The average value of the correction coefficient of each edge multiple LED pixel points of edge with obtain marginal correction coefficient average value,
The average value of the correction coefficient of multiple LED pixel points in the designated area of the M LED display unit is calculated as Integral correction
Coefficient average value and calculate the M LED display unit the Integral correction coefficient average value it is corresponding with each edge
The marginal correction coefficient average value ratio so as to obtain the M LED display unit the multiple edge distinguish
Corresponding edge modifying factor；Or
B () is utilized respectively the respective Luminance Distribution corrected parameter of the M LED display unit to respective described original bright
Degree distributed data group is modified to obtain the respective amendment brightness distribution data group of the M LED display unit；And calculate
Each edge multiple LED pixel point of multiple edges of the M LED display unit is in the amendment Luminance Distribution number
Designated area according to the average value of the brightness data in group to obtain edge brightness average value, calculate the M LED display unit
The average value of brightness data of the interior multiple LED pixel points in the amendment brightness distribution data group is average as overall brightness
Value and calculate the M LED display unit the corresponding edge brightness average value in each edge it is bright with the entirety
Spend the ratio of average value and distinguish corresponding edge modifying factor so as to obtain the multiple edge of the M LED display unit
Son；
Wherein, the edge modifying factor is used to correct the school of multiple LED pixel points at the corresponding edge of target LED display unit
Positive coefficient.
A kind of 11. means for correctings of LED display unit, it is characterised in that including：
Luminance Distribution corrected parameter generation module, for the original using each LED display unit in M LED display unit
The Luminance Distribution corrected parameter of beginning brightness distribution data group generation correspondence LED display unit, wherein M is the natural number more than 1；With
And
Edge modifying factor computing module, is used for：
A () is utilized respectively itself light tone of the respective Luminance Distribution corrected parameter of the M LED display unit to collection
The original brightness distributed data group in degree information is modified to obtain amendment bright chroma information and bright according to each amendment
Chrominance information generates the correction coefficient of the M LED display unit respectively；And calculate the multiple of the M LED display unit
The average value of the correction coefficient of each edge multiple LED pixel points of edge with obtain marginal correction coefficient average value,
The average value of the correction coefficient of multiple LED pixel points in the designated area of the M LED display unit is calculated as Integral correction
Coefficient average value and calculate the M LED display unit the Integral correction coefficient average value it is corresponding with each edge
The marginal correction coefficient average value ratio so as to obtain the M LED display unit the multiple edge distinguish
Corresponding edge modifying factor；Or
B () is utilized respectively the respective Luminance Distribution corrected parameter of the M LED display unit to respective described original bright
Degree distributed data group is modified to obtain the respective amendment brightness distribution data group of the M LED display unit；And calculate
Each edge multiple LED pixel point of multiple edges of the M LED display unit is in the amendment Luminance Distribution number
Designated area according to the average value of the brightness data in group to obtain edge brightness average value, calculate the M LED display unit
The average value of brightness data of the interior multiple LED pixel points in the amendment brightness distribution data group is average as overall brightness
Value and calculate the M LED display unit the corresponding edge brightness average value in each edge it is bright with the entirety
Spend the ratio of average value and distinguish corresponding edge modifying factor so as to obtain the multiple edge of the M LED display unit
Son；
Wherein, the edge modifying factor is used to correct the school of multiple LED pixel points at the corresponding edge of target LED display unit
Positive coefficient.
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| CN107256689B (en) * | 2016-11-09 | 2020-09-18 | 长春希达电子技术有限公司 | Uniformity repairing method for LED display screen after brightness correction |
| CN108074517B (en) * | 2016-11-17 | 2019-11-29 | 西安诺瓦星云科技股份有限公司 | Pointwise correction method |
| US20190130879A1 (en) * | 2017-11-02 | 2019-05-02 | Raydium Semiconductor Corporation | Display Driving Circuit And Operating Method Thereof |
| CN107742511B (en) * | 2017-11-08 | 2019-10-15 | 颜色空间(北京)科技有限公司 | The method and display methods that module mesopic vision gap is eliminated after display screen splicing |
| CN108648722B (en) * | 2018-05-14 | 2021-01-22 | 京东方科技集团股份有限公司 | Brightness compensation method and device |
| CN114078426B (en) * | 2021-09-30 | 2022-12-27 | 卡莱特云科技股份有限公司 | Method for eliminating influence of camera curve on lamp point image and display screen correction method |
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