CN107864369B - The compound display acquisition method of LED display - Google Patents
The compound display acquisition method of LED display Download PDFInfo
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- CN107864369B CN107864369B CN201711092037.1A CN201711092037A CN107864369B CN 107864369 B CN107864369 B CN 107864369B CN 201711092037 A CN201711092037 A CN 201711092037A CN 107864369 B CN107864369 B CN 107864369B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits
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Abstract
The present invention relates to a kind of compound display acquisition method of LED display, this method utilizes the spectrum stalling characteristic of optical filter, obtains spectral tristimulus value under the conditions of display screen different composite display mode.Final RGB primary colours tristimulus values is calculated according to the spectral tristimulus value obtained under the conditions of different composite display mode.This method is capable of increasing pixel light emission intensity, improves point-by-point acquisition precision, achievees the purpose that accurately to acquire and correct.The present invention increases the luminous intensity of display pixel instead of traditional single primary colours display methods, avoids the generation of low-light level acquisition, solves the problems, such as high density, small spacing, the low acquisition inaccuracy of large scale LED display brightness, improves acquisition precision.
Description
Technical field
The invention belongs to LED to show acquisition correction technical field, be related to a kind of new side of bright chroma acquisition of LED display
Method.
Background technique
LED display is a kind of multimedia display terminal, is shone with its active, high color saturation, wide viewing angle, high comparison
The features such as spending, is seamless spliced shows that the demand in market is increasingly urgent in large scale, oversize, and showing quality is that evaluation produces
One of the important indicator of product quality.With the fast development of luminescence chip and integrated circuit, LED display technique is close towards superelevation
Degree, it is the main trend of future development that possibility is developed into extra small spacing, oversize direction.And mainly there are two skills at present
Art route can satisfy the demand of LED display high density, the development of small spacing: (1) SMD technology path, but the route is extremely difficult
Realize the production of point spacing≤0.5mm ultra high density LED display；(2) COB technology path, between which may be implemented a little
The production of ultra high density LED display away from≤0.5mm, but its color-division ability is poor, display screen adjacent display modules are deposited
In serious bright chroma difference, while the reasons such as the discreteness of light emitting diode, Decay Rate, that there are bright chromas is aobvious for LED display
Show non-uniform problem, seriously affects display effect.These problems seriously destroy display screen and show quality, become LED and show
One of the problem of technology development.
Solution to the problems described above is mainly the acquisition of point-by-point bright chroma and bearing calibration of LED display at present, is passed through
Acquisition camera obtains the original bright chroma information of LED display display pixel point by point, and correction coefficient is calculated, passes through control system
It uploads display screen to achieve the purpose that mention high display quality, wherein the accurate acquisition of the original bright chroma information of display screen is calibration result
It is able to the premise guaranteed.But since the LED display of ultra high density, extra small spacing is limited by its luminescence chip size, function
The restriction of rate and temperature, pixel light emission intensity reduce, and traditional acquisition method is shown and carries out by display screen list primary colours
Point-by-point acquisition achievees the purpose that correction, and the point-by-point acquisition method of LED display acquisition precision under low illumination conditions is low, can not
The accurate bright chroma information for obtaining display screen, seriously affects calibration result, can not improve ultra high density, extra small spacing LED is shown
The display quality of screen becomes one of the problem of point-by-point acquisition and alignment technique.
Summary of the invention
It is high that the technical problem to be solved in the present invention is to provide a kind of acquisition precisions, can accurately obtain display screen bright chroma letter
The compound display acquisition method of the LED display of breath.
In order to solve the above-mentioned technical problem, the compound display acquisition method of LED display of the invention, using following three kinds of skills
Art scheme
Technical solution one
The compound display acquisition method of LED display of the invention, includes the following steps:
Step 1: control LED display display pixel red-green-blue light simultaneously, with the camera with optical filter into
The point-by-point acquisition of taking pictures of row, obtains the compound display bright chroma information R of RGB of each pixel rgb spacew、Gw、Bw, and to whole screen or
Partial region carries out one or many calibration, obtains the tristimulus values X of the compound display of CIE1931 chrominance space RGBw、Yw、
Zw；Again with Xw、Yw、ZwTransition matrix A is obtained on the basis of tristimulus values by way of regression approachw, then pass through formula (1-1) and obtain
The tristimulus correction value X of the compound display of CIE1931 chrominance space RGB of each pixel1、Y1、Z1；
Step 2: control red green two primary colours of LED display display pixel are lighted simultaneously, carried out with the camera with optical filter
Point-by-point acquisition of taking pictures, obtains the red green compound display bright chroma information R of each pixel rgb spacerg、Grg、BrgAnd whole screen is marked
It is fixed, obtain the tristimulus values X of the red green compound display of CIE1931 chrominance spacerg、Yrg、Zrg；Again with Xrg、Yrg、ZrgTristimulus values is
Benchmark obtains transition matrix A by way of regression approachrg, then pass through formula (1-3) and obtain the CIE1931 coloration of each pixel
The tristimulus correction value X of the red green compound display in space2、Y2、Z2；
Step 3: control turquoise two primary colours of LED display display pixel are lighted simultaneously, carried out with the camera with optical filter
Point-by-point acquisition of taking pictures, obtains the turquoise compound display bright chroma information R of each pixel rgb spacegb、Ggb、BgbAnd whole screen is marked
It is fixed, obtain the tristimulus values X of the turquoise compound display of CIE1931 chrominance spacegb、Ygb、Zgb；Again with Xgb、Ygb、ZgbTristimulus values is
Benchmark obtains transition matrix A by way of regression approachgb, then pass through formula (1-5) and obtain the CIE1931 coloration of each pixel
The tristimulus correction value X of the turquoise compound display in space3、Y3、Z3；
Step 4: control red blue two primary colours of LED display display pixel are lighted simultaneously, carried out with the camera with optical filter
Point-by-point acquisition of taking pictures, obtains the compound display bright chroma information R of red indigo plant of each pixel rgb spacerb、Grb、BrbAnd whole screen is marked
It is fixed, obtain the tristimulus values X of the red compound display of indigo plant of CIE1931 chrominance spacerb、Yrb、Zrb；Again with Xrb、Yrb、ZrbTristimulus values is
Benchmark obtains transition matrix A by way of regression approachrb, then pass through formula (1-7) and obtain the CIE1931 coloration of each pixel
Tristimulus correction value X4, Y4, Z4 of the red compound display of indigo plant in space；
Step 5: subtracting turquoise two primary colours tristimulus values using white field tristimulus values obtains final red primary tristimulus values
Xr,Yr,Zr:
Xr=X1-X3
Yr=Y1-Y3
Zr=Z1-Z3 (1-9)
Red blue two primary colours tristimulus values, which is subtracted, using white field tristimulus values obtains final green primary tristimulus values Xg,Yg,
Zg:
Xg=X1-X4
Yg=Y1-Y4
Zg=Z1-Z4 (1-10)
Red green two primary colours tristimulus values, which is subtracted, using white field tristimulus values obtains final blue primary tristimulus values Xb,Yb,
Zb:
Xb=X1-X2
Yb=Y1-Y2
Zb=Z1-Z2 (1-11)
The optical filter is the optical filter for not meeting human-eye visual characteristic.
Technical solution two
One, control LED display display pixel red-green-blue is lighted simultaneously, and with the optical camera with optical filter
It is taken pictures point by point to it acquisition, obtains the compound display bright chroma information R of RGB of each pixel rgb spacew’、Gw’、Bw',
Rw’、Gw’、Bw' be exactly the compound display of CIE1931 chrominance space RGB tristimulus values Xw’、Yw’、Zw'；
Two, control LED display shows red green two primary colours, and is clapped point by point with the optical camera with optical filter it
According to acquisition, the red green compound display bright chroma information R of each pixel rgb space is obtainedrg’、Grg’、Brg', Rrg’、Grg’、Brg' be exactly
The tristimulus values X of the red green compound display of CIE1931 chrominance spacerg’、Yrg’、Zrg'；
Three, control LED display shows turquoise two primary colours, and is clapped point by point with the optical camera with optical filter it
According to acquisition, the turquoise compound display bright chroma information R of each pixel rgb space is obtainedgb’、Ggb’、Bgb', Rgb’、Ggb’、Bgb' be exactly
The tristimulus values X of the turquoise compound display of CIE1931 chrominance spacegb’、Ygb’、Zgb'；
Four, control LED display shows red blue two primary colours, and is clapped point by point with the optical camera with optical filter it
According to acquisition, the compound display bright chroma information R of red indigo plant of each pixel rgb space is obtainedrb’、Grb’、Brb', Rrb’、Grb’、Brb' be exactly
The tristimulus values X of the red compound display of indigo plant of CIE1931 chrominance spacerb’、Yrb’、Zrb'；
Five, white field tristimulus values X is utilizedw’、Yw’、Zw' subtract turquoise two primary colours tristimulus Xgb’、Ygb’、Zgb' value obtains most
Whole red primary tristimulus values Xr’、Y r’、Z r':
Utilize white field tristimulus values Xw’、Yw’、Zw' subtract red blue two primary colours tristimulus Xrb’、Yrb’、Zrb' value obtains finally
Green primary tristimulus values Xg’、Y g’、Z g':
Utilize white field tristimulus values Xw’、Yw’、Zw' subtract red green two primary colours tristimulus Xrg’、Yrg’、Zrg' value obtains finally
Blue primary tristimulus values Xb’、Yb’、Zb':
The optical filter is the optical filter for meeting human-eye visual characteristic.
Technical solution three
One, control LED display display pixel red-green-blue is lighted simultaneously, and with the optical camera with optical filter
It is taken pictures point by point to it acquisition, obtains the compound display bright chroma information R of RGB of each pixel rgb spacew', Gw', Bw', will
Rw', Gw', BwApproximation X of the ' as the compound display tristimulus values of CIE1931 chrominance space RGBw', Yw', Zw'；Further according to
Formula (3-1) finds out the tristimulus correction value X of the compound display of CIE1931 chrominance space RGB1', Y1', Z1'；
Wherein Cwx, Cwy,, CwzIt is deviation between the optical filter measured spectra curve and theoretical curve of the compound display of RGB
Correction factor；
Two, control LED display shows red green two primary colours, and is clapped point by point with the optical camera with optical filter it
According to acquisition, the red green compound display bright chroma information R of each pixel rgb space is obtainedrg', Grg', Brg', by Rrg', Grg', Brg' makees
For the approximation X of the red green compound display tristimulus values of CIE1931 chrominance spacerg', Yrg', Zrg'；It is found out further according to formula (3-2)
The tristimulus correction value X of the red green compound display of CIE1931 chrominance space2', Y2', Z2'；
Wherein Crgx,Crgy,CrgzIt is deviation between the optical filter measured spectra curve and theoretical curve of red green compound display
Correction factor；
Three, control LED display shows turquoise two primary colours, and is clapped point by point with the optical camera with optical filter it
According to acquisition, the turquoise compound display bright chroma information R of each pixel rgb space is obtainedgb', Ggb', Bgb', by Rgb', Ggb', Bgb' makees
For the approximation X of the turquoise compound display tristimulus values of CIE1931 chrominance spacegb', Ygb', Zgb'；It is found out further according to formula (3-3)
The tristimulus correction value X of the turquoise compound display of CIE1931 chrominance space3', Y3', Z3'；
Wherein Cgbx、Cgby、CgbzIt is deviation between the optical filter measured spectra curve and theoretical curve of turquoise compound display
Correction factor；
Four, control LED display shows red blue two primary colours, and is clapped point by point with the optical camera with optical filter it
According to acquisition, the compound display bright chroma information R of red indigo plant of each pixel rgb space is obtainedrb', Grb', Brb', by Rrb', Grb', Brb' makees
For the tristimulus values X of the red compound display of indigo plant of CIE1931 chrominance spacerb', Yrb', Zrb'；It is found out further according to formula (3-4)
The tristimulus correction value X of the red compound display of indigo plant of CIE1931 chrominance space4', Y4', Z4'；
Wherein Crbx、Crby、CrbzIt is deviation between the optical filter measured spectra curve and theoretical curve of the red compound display of indigo plant
Correction factor；
Five, white field tristimulus values X is utilized1', Y1', Z1' subtracts turquoise two primary colours tristimulus correction value X3', Y3', Z3' is obtained
Final red primary tristimulus values Xr〃、Yr〃、Zr〃:
Xr"=X1'-X3'
Yr"=Y1'-Y3'
Zr"=Z1'-Z3' (3-5)
Utilize white field tristimulus values X1', Y1', Z1' subtracts red blue two primary colours tristimulus correction value X4〃、Y4', Z4' is obtained most
Whole green primary tristimulus values Xg〃、Yg〃、Zg〃:
Xg"=X1'-X4'
Yg"=Y1'-Y4'
Zg"=Z1'-Z4' (3-6)
Utilize white field tristimulus values X1', Y1', Z1' subtracts red green two primary colours tristimulus correction value X2', Y2', Z2' is obtained most
Whole blue primary tristimulus values Xb〃、Yb〃、Zb〃:
Xb"=X1'-X2'
Yb"=Y1'-Y2'
Zb"=Z1'-Z2' (3-7)
The optical filter is the optical filter for meeting human-eye visual characteristic.
The present invention utilizes the spectrum stalling characteristic of optical filter, obtains spectrum under the conditions of display screen different composite display mode
Tristimulus values.Final RGB primary colours are calculated according to the spectral tristimulus value obtained under the conditions of different composite display mode
Tristimulus values.This method is capable of increasing pixel light emission intensity, improves point-by-point acquisition precision, reaches the accurate mesh acquired and correct
's.The present invention increases the luminous intensity of display pixel instead of traditional single primary colours display methods, avoids low-light level acquisition
Generation, solve the problems, such as the low acquisition inaccuracy of high density, small spacing, large scale LED display brightness, improve acquisition essence
Degree.
Detailed description of the invention
Invention is further described in detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the compound display model figure of LED display RGB.
Fig. 2 is the red green compound display model figure of LED display.
Fig. 3 is the turquoise compound display model figure of LED display.
Fig. 4 is the compound display model figure of the red indigo plant of LED display.
Fig. 5 is the flow chart of the compound acquisition method of LED display of the invention.
Specific embodiment
The present invention uses the camera with optical filter to carry out acquisition of taking pictures point by point, and the optical filter of transmission feux rouges is added to obtain red base
Color bright chroma information；The optical filter of transmission green light is added to obtain green primary bright chroma information；The optical filter of transmission blue light is added to obtain indigo plant
Primary colours bright chroma information.Acquisition mode can be full frame interlacing and acquire every column acquisition, subregion acquisition or subregion interlacing every column.
(optical filter used in the present embodiment is the optical filter for not meeting human-eye visual characteristic to embodiment 1, i.e. the spectrum of optical filter
Curve is different from standard curve)
The compound display acquisition method of LED display of the invention, includes the following steps:
Step 1: control LED display display pixel red-green-blue light simultaneously, with the camera with optical filter into
The point-by-point acquisition of taking pictures of row, obtains the compound display bright chroma information R of RGB of each pixel rgb spacew、Gw、Bw, then use spectrum
Colorimeter demarcates whole screen, obtains the tristimulus values X of the compound display of CIE1931 chrominance space RGBw、Yw、Zw；Again with
Xw、Yw、ZwTransition matrix A is obtained on the basis of tristimulus values by way of regression approachw, then pass through formula (1-1) and obtain each picture
The tristimulus correction value X of the compound display of CIE1931 chrominance space RGB of element1、Y1、Z1；
Transition matrix AwAsk method as follows:
Formula (2) are obtained according to the principle of least square
Wherein k is a certain pixel of display screen, and n is display screen total pixel number amount, enables QX, and QY, QZ are minimum, acquire at this time
aw11,aw12,aw13,aw21,aw22,aw23,aw31,aw32,aw33Form final transition matrix Aw；
Step 2: control red green two primary colours of LED display display pixel are lighted simultaneously, carried out with the camera with optical filter
Point-by-point acquisition of taking pictures, obtains the red green compound display bright chroma information R of each pixel rgb spacerg、Grg、Brg, then use spectrum colour
Degree meter demarcates whole screen, obtains the tristimulus values X of the red green compound display of CIE1931 chrominance spacerg、Yrg、Zrg；Again with Xrg、
Yrg、ZrgTransition matrix A is obtained on the basis of tristimulus values by way of regression approachrg, then pass through formula (1-3) and obtain each picture
The tristimulus correction value X of the red green compound display of CIE1931 chrominance space of element2、Y2、Z2；
Step 3: control turquoise two primary colours of LED display display pixel are lighted simultaneously, carried out with the camera with optical filter
Point-by-point acquisition of taking pictures, obtains the turquoise compound display bright chroma information R of each pixel rgb spacegb、Ggb、Bgb；Then spectrum colour is used
Degree meter demarcates whole screen, obtains the tristimulus values X of the turquoise compound display of CIE1931 chrominance spacegb、Ygb、Zgb；Again with Xgb、
Ygb、ZgbTransition matrix A is obtained on the basis of tristimulus values by way of regression approachgb, then pass through formula (1-5) and obtain each picture
The tristimulus correction value X of the turquoise compound display of CIE1931 chrominance space of element3、Y3、Z3；
Step 4: control red blue two primary colours of LED display display pixel are lighted simultaneously, carried out with the camera with optical filter
Point-by-point acquisition of taking pictures, obtains the compound display bright chroma information R of red indigo plant of each pixel rgb spacerb、Grb、Brb；Then spectrum colour is used
Degree meter demarcates whole screen, obtains the tristimulus values X of the red compound display of indigo plant of CIE1931 chrominance spacerb、Yrb、Zrb；Again with Xrb、
Yrb、ZrbTransition matrix A is obtained on the basis of tristimulus values by way of regression approachrb, then pass through formula (1-7) and obtain each picture
The tristimulus correction value X of the red compound display of indigo plant of CIE1931 chrominance space of element4、Y4、Z4；
Step 5: subtracting turquoise two primary colours tristimulus values using white field tristimulus values obtains final red primary tristimulus values
Xr,Yr,Zr:
Xr=X1-X3
Yr=Y1-Y3
Zr=Z1-Z3 (1-9)
Red blue two primary colours tristimulus values, which is subtracted, using white field tristimulus values obtains final green primary tristimulus values Xg,Yg,
Zg:
Xg=X1-X4
Yg=Y1-Y4
Zg=Z1-Z4 (1-10)
Red green two primary colours tristimulus values, which is subtracted, using white field tristimulus values obtains final blue primary tristimulus values Xb,Yb,
Zb:
Xb=X1-X2
Yb=Y1-Y2
Zb=Z1-Z2 (1-11)
(optical filter used is the optical filter for meeting human-eye visual characteristic to embodiment 2, i.e. the curve of spectrum and standard of optical filter
Curve identical.The present embodiment defaults indifference between optical filter measured spectra curve and theoretical curve)
One, control LED display display pixel red-green-blue is lighted simultaneously, and with the optical camera with optical filter
It is taken pictures point by point to it acquisition, obtains the compound display bright chroma information R of RGB of each pixel rgb spacew’、Gw’、Bw',
Rgb', Ggb', Bgb' is equal to the tristimulus values X of the compound display of CIE1931 chrominance space RGBw’、Yw’、Zw'；
Two, control LED display shows red green two primary colours, and is clapped point by point with the optical camera with optical filter it
According to acquisition, the red green compound display bright chroma information R of each pixel rgb space is obtainedrg’、Grg’、Brg', Rgb', Ggb', Bgb' is equal to
The tristimulus values X of the red green compound display of CIE1931 chrominance spacerg’、Yrg’、Zrg'；
Three, control LED display shows turquoise two primary colours, and is clapped point by point with the optical camera with optical filter it
According to acquisition, the turquoise compound display bright chroma information R of each pixel rgb space is obtainedgb’、Ggb’、Bgb', Rgb', Ggb', Bgb' is equal to
The tristimulus values X of the turquoise compound display of CIE1931 chrominance spacegb’、Ygb’、Zgb'；
Four, control LED display shows red blue two primary colours, and is clapped point by point with the optical camera with optical filter it
According to acquisition, the compound display bright chroma information R of red indigo plant of each pixel rgb space is obtainedrb’、Grb’、Brb', Rgb', Ggb', Bgb' is equal to
The tristimulus values X of the red compound display of indigo plant of CIE1931 chrominance spacerb’、Yrb’、Zrb'；
Five, white field tristimulus values X is utilizedw’、Yw’、Zw' subtract turquoise two primary colours tristimulus Xgb’、Ygb’、Zgb' value obtains most
Whole red primary tristimulus values Xr’、Y r’、Z r':
Utilize white field tristimulus values Xw’、Yw’、Zw' subtract red blue two primary colours tristimulus Xrb’、Yrb’、Zrb' value obtains finally
Green primary tristimulus values Xg’、Y g’、Z g':
Utilize white field tristimulus values Xw’、Yw’、Zw' subtract red green two primary colours tristimulus Xrg’、Yrg’、Zrg' value obtains finally
Blue primary tristimulus values Xb’、Yb’、Zb':
Embodiment 3 (optical filter used in the present embodiment is the optical filter for meeting human-eye visual characteristic)
One, control LED display display pixel red-green-blue is lighted simultaneously, and with the optical camera with optical filter
It is taken pictures point by point to it acquisition, obtains the compound display bright chroma information R of RGB of each pixel rgb spacew', Gw', Bw', will
Rw', Gw', BwApproximation X as the compound display tristimulus values of CIE1931 chrominance space RGBw', Yw', Zw'；Further according to public affairs
Formula (3-1) finds out the tristimulus correction value X of the compound display of CIE1931 chrominance space RGB1', Y1', Z1'；
Wherein Cwx, Cwy,, CwzIt is deviation between the optical filter measured spectra curve and theoretical curve of the compound display of RGB
Correction factor, which can be calculated according to general knowledge known in this field；
Two, control LED display shows red green two primary colours, and is clapped point by point with the optical camera with optical filter it
According to acquisition, the red green compound display bright chroma information R of each pixel rgb space is obtainedrg', Grg', Brg', by Rrg', Grg', Brg' makees
For the approximation X of the red green compound display tristimulus values of CIE1931 chrominance spacerg', Yrg', Zrg'；It is found out further according to formula (3-2)
The tristimulus correction value X of the red green compound display of CIE1931 chrominance space2', Y2', Z2'；
Wherein Crgx,Crgy,CrgzIt is deviation between the optical filter measured spectra curve and theoretical curve of red green compound display
Correction factor；
Three, control LED display shows turquoise two primary colours, and is clapped point by point with the optical camera with optical filter it
According to acquisition, the turquoise compound display bright chroma information R of each pixel rgb space is obtainedgb', Ggb', Bgb', by Rgb', Ggb', Bgb' makees
For the approximation X of the tristimulus values of the turquoise compound display of CIE1931 chrominance spacegb', Ygb', Zgb'；It is asked further according to formula (3-3)
The tristimulus correction value X of the turquoise compound display of CIE1931 chrominance space out3', Y3', Z3'；
Wherein Cgbx、Cgby、CgbzIt is deviation between the optical filter measured spectra curve and theoretical curve of turquoise compound display
Correction factor；
Four, control LED display shows red blue two primary colours, and is clapped point by point with the optical camera with optical filter it
According to acquisition, the compound display bright chroma information R of red indigo plant of each pixel rgb space is obtainedrb', Grb', Brb', by Rrb', Grb', Brb' makees
For the approximation X of the tristimulus values of the red compound display of indigo plant of CIE1931 chrominance spacerb', Yrb', Zrb'；It is asked further according to formula (3-4)
The tristimulus correction value X of the red compound display of indigo plant of CIE1931 chrominance space out4', Y4', Z4'；
Wherein Crbx、Crby、CrbzIt is deviation between the optical filter measured spectra curve and theoretical curve of the red compound display of indigo plant
Correction factor；
Five, white field tristimulus values X is utilized1', Y1', Z1' subtracts turquoise two primary colours tristimulus correction value X3', Y3', Z3' is obtained
Final red primary tristimulus values Xr〃、Yr〃、Zr〃:
Xr"=X1'-X3'
Yr"=Y1'-Y3'
Zr"=Z1'-Z3' (3-5)
Utilize white field tristimulus values X1', Y1', Z1' subtracts red blue two primary colours tristimulus correction value X4〃、Y4', Z4' is obtained most
Whole green primary tristimulus values Xg〃、Yg〃、Zg〃:
Xg"=X1'-X4'
Yg"=Y1'-Y4'
Zg"=Z1'-Z4' (3-6)
Utilize white field tristimulus values X1', Y1', Z1' subtracts red green two primary colours tristimulus correction value X2', Y2', Z2' is obtained most
Whole blue primary tristimulus values Xb〃、Yb〃、Zb〃:
Xb"=X1'-X2'
Yb"=Y1'-Y2'
Zb"=Z1'-Z2' (3-7)
The present invention carries out compound display by controlling display screen red-green-blue in different ways, improves pixel light emission
Intensity.The tristimulus values of single primary colours is accurately calculated further according to the spectrum stalling characteristic of optical filter, it is ensured that acquisition it is accurate
Degree, solves the problems, such as that single primary colours display brightness is low.
Claims (3)
1. a kind of compound display acquisition method of LED display, it is characterised in that include the following steps:
Step 1: control LED display display pixel red-green-blue light simultaneously, with the camera with optical filter carry out by
Acquisition of taking pictures is put, the compound display bright chroma information R of RGB of each pixel rgb space is obtainedw、Gw、Bw, and to whole screen or part
Region carries out one or many calibration, obtains the tristimulus values X of the compound display of CIE1931 chrominance space RGBw、Yw、Zw；Again
With Xw、Yw、ZwTransition matrix A is obtained on the basis of tristimulus values by way of regression approachw, then by formula (1-1) obtain it is each
The tristimulus correction value X of the compound display of CIE1931 chrominance space RGB of pixel1、Y1、Z1；
Step 2: control red green two primary colours of LED display display pixel are lighted simultaneously, carried out point by point with the camera with optical filter
It takes pictures acquisition, obtains the red green compound display bright chroma information R of each pixel rgb spacerg、Grg、BrgAnd whole screen is demarcated,
Obtain the tristimulus values X of the red green compound display of CIE1931 chrominance spacerg、Yrg、Zrg；Again with Xrg、Yrg、ZrgTristimulus values is base
Standard obtains transition matrix A by way of regression approachrg, then it is empty by the CIE1931 coloration that formula (1-3) obtains each pixel
Between red green compound display tristimulus correction value X2、Y2、Z2；
Step 3: control turquoise two primary colours of LED display display pixel are lighted simultaneously, carried out point by point with the camera with optical filter
It takes pictures acquisition, obtains the turquoise compound display bright chroma information R of each pixel rgb spacegb、Ggb、BgbAnd whole screen is demarcated,
Obtain the tristimulus values X of the turquoise compound display of CIE1931 chrominance spacegb、Ygb、Zgb；Again with Xgb、Ygb、ZgbTristimulus values is base
Standard obtains transition matrix A by way of regression approachgb, then it is empty by the CIE1931 coloration that formula (1-5) obtains each pixel
Between turquoise compound display tristimulus correction value X3、Y3、Z3；
Step 4: control red blue two primary colours of LED display display pixel are lighted simultaneously, carried out point by point with the camera with optical filter
It takes pictures acquisition, obtains the compound display bright chroma information R of red indigo plant of each pixel rgb spacerb、Grb、BrbAnd whole screen is demarcated,
Obtain the tristimulus values X of the red compound display of indigo plant of CIE1931 chrominance spacerb、Yrb、Zrb；Again with Xrb、Yrb、ZrbTristimulus values is base
Standard obtains transition matrix A by way of regression approachrb, then it is empty by the CIE1931 coloration that formula (1-7) obtains each pixel
Between the red compound display of indigo plant tristimulus correction value X4, Y4, Z4；
Step 5: subtracting turquoise two primary colours tristimulus values using white field tristimulus values obtains final red primary tristimulus values Xr,
Yr,Zr:
Xr=X1-X3
Yr=Y1-Y3
Zr=Z1-Z3 (1-9)
Red blue two primary colours tristimulus values, which is subtracted, using white field tristimulus values obtains final green primary tristimulus values Xg,Yg,Zg:
Xg=X1-X4
Yg=Y1-Y4
Zg=Z1-Z4 (1-10)
Red green two primary colours tristimulus values, which is subtracted, using white field tristimulus values obtains final blue primary tristimulus values Xb,Yb,Zb:
Xb=X1-X2
Yb=Y1-Y2
Zb=Z1-Z2 (1-11)
The optical filter is the optical filter for not meeting human-eye visual characteristic.
2. a kind of compound display acquisition method of LED display, it is characterised in that include the following steps:
One, control LED display display pixel red-green-blue is lighted simultaneously, and with the optical camera with optical filter to it
Acquisition of taking pictures point by point is carried out, the compound display bright chroma information R of RGB of each pixel rgb space is obtainedw’、Gw’、Bw', Rw’、
Gw’、Bw' be exactly the compound display of CIE1931 chrominance space RGB tristimulus values Xw’、Yw’、Zw'；
Two, control LED display shows red green two primary colours, and is taken pictures and adopted point by point to it with the optical camera with optical filter
Collection, obtains the red green compound display bright chroma information R of each pixel rgb spacerg’、Grg’、Brg', Rrg’、Grg’、Brg' be exactly
The tristimulus values X of the red green compound display of CIE1931 chrominance spacerg’、Yrg’、Zrg'；
Three, control LED display shows turquoise two primary colours, and is taken pictures and adopted point by point to it with the optical camera with optical filter
Collection, obtains the turquoise compound display bright chroma information R of each pixel rgb spacegb’、Ggb’、Bgb', Rgb’、Ggb’、Bgb' be exactly
The tristimulus values X of the turquoise compound display of CIE1931 chrominance spacegb’、Ygb’、Zgb'；
Four, control LED display shows red blue two primary colours, and is taken pictures and adopted point by point to it with the optical camera with optical filter
Collection, obtains the compound display bright chroma information R of red indigo plant of each pixel rgb spacerb’、Grb’、Brb', Rrb’、Grb’、Brb' be exactly
The tristimulus values X of the red compound display of indigo plant of CIE1931 chrominance spacerb’、Yrb’、Zrb'；
Five, white field tristimulus values X is utilizedw’、Yw’、Zw' subtract turquoise two primary colours tristimulus Xgb’、Ygb’、Zgb' value obtain it is final
Red primary tristimulus values Xr’、Yr’、Zr':
Utilize white field tristimulus values Xw’、Yw’、Zw' subtract red blue two primary colours tristimulus Xrb’、Yrb’、Zrb' value obtain it is final green
Primary colours tristimulus values Xg’、Yg’、Zg':
Utilize white field tristimulus values Xw’、Yw’、Zw' subtract red green two primary colours tristimulus Xrg’、Yrg’、Zrg' value obtains final indigo plant
Primary colours tristimulus values Xb’、Yb’、Zb':
The optical filter is the optical filter for meeting human-eye visual characteristic.
3. a kind of compound display acquisition method of LED display, it is characterised in that include the following steps:
One, control LED display display pixel red-green-blue is lighted simultaneously, and with the optical camera with optical filter to it
Acquisition of taking pictures point by point is carried out, the compound display bright chroma information R of RGB of each pixel rgb space is obtainedw', Gw', Bw', by Rw',
Gw', BwApproximation X of the ' as the compound display tristimulus values of CIE1931 chrominance space RGBw', Yw', Zw'；Further according to formula
(3-1) finds out the tristimulus correction value X of the compound display of CIE1931 chrominance space RGB1', Y1', Z1'；
Wherein Cwx, Cwy, CwzIt is that deviation is repaired between the optical filter measured spectra curve and theoretical curve of the compound display of RGB
Positive coefficient；
Two, control LED display shows red green two primary colours, and is taken pictures and adopted point by point to it with the optical camera with optical filter
Collection, obtains the red green compound display bright chroma information R of each pixel rgb spacerg', Grg', Brg', by Rrg', Grg', Brg' conduct
The approximation X of the red green compound display tristimulus values of CIE1931 chrominance spacerg', Yrg', Zrg'；It is found out further according to formula (3-2)
The tristimulus correction value X of the red green compound display of CIE1931 chrominance space2', Y2', Z2'；
Wherein Crgx,Crgy,CrgzIt is the amendment of deviation between the optical filter measured spectra curve and theoretical curve of red green compound display
Coefficient；
Three, control LED display shows turquoise two primary colours, and is taken pictures and adopted point by point to it with the optical camera with optical filter
Collection, obtains the turquoise compound display bright chroma information R of each pixel rgb spacegb', Ggb', Bgb', by Rgb', Ggb', Bgb' conduct
The approximation X of the turquoise compound display tristimulus values of CIE1931 chrominance spacegb', Ygb', Zgb'；It is found out further according to formula (3-3)
The tristimulus correction value X of the turquoise compound display of CIE1931 chrominance space3', Y3', Z3'；
Wherein Cgbx、Cgby、CgbzIt is the amendment of deviation between the optical filter measured spectra curve and theoretical curve of turquoise compound display
Coefficient；
Four, control LED display shows red blue two primary colours, and is taken pictures and adopted point by point to it with the optical camera with optical filter
Collection, obtains the compound display bright chroma information R of red indigo plant of each pixel rgb spacerb', Grb', Brb', by Rrb', Grb', Brb' conduct
The tristimulus values X of the red compound display of indigo plant of CIE1931 chrominance spacerb', Yrb', Zrb'；CIE1931 is found out further according to formula (3-4)
The tristimulus correction value X of the red compound display of indigo plant of chrominance space4', Y4', Z4'；
Wherein Crbx、Crby、CrbzIt is the amendment of deviation between the optical filter measured spectra curve and theoretical curve of the red compound display of indigo plant
Coefficient；
Five, white field tristimulus values X is utilized1', Y1', Z1' subtracts turquoise two primary colours tristimulus correction value X3', Y3', Z3' is obtained finally
Red primary tristimulus values Xr〃、Yr〃、Zr〃:
Xr"=X1'-X3'
Yr"=Y1'-Y3'
Zr"=Z1'-Z3' (3-5)
Utilize white field tristimulus values X1', Y1', Z1' subtracts red blue two primary colours tristimulus correction value X4〃、Y4', Z4' obtains final
Green primary tristimulus values Xg〃、Yg〃、Zg〃:
Xg"=X1'-X4'
Yg"=Y1'-Y4'
Zg"=Z1'-Z4' (3-6)
Utilize white field tristimulus values X1', Y1', Z1' subtracts red green two primary colours tristimulus correction value X2', Y2', Z2' obtains final
Blue primary tristimulus values Xb〃、Yb〃、Zb〃:
Xb"=X1'-X2'
Yb"=Y1'-Y2'
Zb"=Z1'-Z2' (3-7)
The optical filter is the optical filter for meeting human-eye visual characteristic.
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