CN105512461A - Calculation method, and system of backlight mura value and detection device - Google Patents
Calculation method, and system of backlight mura value and detection device Download PDFInfo
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- CN105512461A CN105512461A CN201510834041.5A CN201510834041A CN105512461A CN 105512461 A CN105512461 A CN 105512461A CN 201510834041 A CN201510834041 A CN 201510834041A CN 105512461 A CN105512461 A CN 105512461A
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
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Abstract
The invention provides a calculation method and system of backlight mura value and a detection device. The method comprises following steps: taking a relative luminance curve of a display panel and a luminance matrix and removing direct current component of the relative luminance curve in order to obtain mura component of the relative luminance curve; obtaining frequency multiplication based on measurement distance and distance between a backlight and a lamp core; performing DFT conversion of the luminance matrix in order to obtain an F(fx); adding real parts and imaginary parts of the F(fx) matrix in order to obtain an FP (fx); and performing CS calculation of a frequency doubling matrix f in order to obtain a CSF (f) and obtaining the mura value based on the matrix FP (fx), the CSF (f) and the empirical constant.The technical scheme provided by the invention has advantages of high efficiency and low cost.
Description
Technical field
The present invention relates to display field, particularly relate to a kind of computing method of backlight mura value, system and pick-up unit.
Background technology
Liquid crystal display is (English: panel) also known as LCD (English full name: LiquidCrystalDisplay, Chinese: liquid crystal display), it is electronic display unit conventional at present.In recent years, the market share of CCFL (English full name: ColdCathodeFluorescentLamp, Chinese: cathode fluorescent tube), the illuminated LED-backlit of direct-light type LED backlight and side was more and more higher.In order to cost-saving and visual appearance, the thickness of the thinning diffuser plate of meeting (diffuserplate) usually or the thickness of minimizing optical cavity, this kind of scheme just has mura and occurs.
In the scheme realizing prior art, find that prior art exists following technical matters:
In the prior art, producer gives training personnel usually, and the mode then by artificially observing assesses mura value (producer had is also referred to as mura grade or mura seriousness); This kind of method efficiency is low, and the artificial subjectivity evaluated is too high, and evaluation criterion differs, and mura value belongs to the important parameter of display panel, and mura value evaluates the inaccurate easy quality affecting display panel.
Summary of the invention
There is provided a kind of computing method of backlight mura value, the computing method of described backlight mura value quantize automatic calculating to mura value, without the need to carrying out manual evaluation mura value, so its to have efficiency high, the advantage that evaluation criterion is unified, objectivity is strong.
First aspect, provide a kind of computing method of backlight mura value, described method comprises the steps:
Obtain the relative brightness relativeluminance curve of display panel and the brightness luminance matrix of display panel, the DC component removing relative luminance curve obtains the muramura component of relative luminance curve;
A frequency multiplication f is calculated according to the distance between measuring distance and the backlight backlight wick of display panel
n;
Luminance square Array is DFT and is converted to F (fx);
F (f
x)=[Lx1, Lx2...........Lxn]; Wherein,
Lx1 is 0/n harmonic, and Lx2 is 1/n harmonic, and Lxn is (n-1)/n harmonic, and n is the sampled point number of luminance square Array;
By F (f
x) real part in matrix is added and imaginary part addition obtains matrix F
p(fx);
F
P(fx)＝|F
P(fx)
real|+|F
P(fx)
imag|
Wherein, F
p(fx)
realfor F (f
x) matrix real part, F
p(fx)
imagfor F (f
x) matrix imaginary part;
According to matrix F
p(fx) and empirical constant calculate mura value.
In conjunction with the computing method of the backlight mura value that first aspect provides, in the first preferred version of first aspect, described according to matrix F
p(fx) and empirical constant to calculate mura value concrete, comprising:
By F
p(fx) substitute into the first preset formula and calculate mura value; This first preset formula is:
Q＝ΣF
p(fx)
JND＝Q/C；
Wherein, C is empirical constant, and JND is mura value.
In conjunction with the computing method of the backlight mura value that first aspect provides, in the second preferred version of first aspect, described according to matrix F
p(fx) and empirical constant to calculate mura value concrete, comprising:
CS is carried out to frequency multiplication matrix f and calculates CSF (f), by F
p(fx) and CSF (f) substitute into the second preset formula and calculate mura value; Described second preset formula is specially:
Q＝ΣF
p(fx)·CSF(f)
Wherein, CSF (f)=2.6* (0.0192+0.114*f) * exp (-(0.114*f) ^1.1))
JND＝Q/C；
Wherein, C is empirical constant, and f is frequency multiplication matrix, and JND is mura value;
f＝[f
1,f
2...........f
n]
Wherein, f
nrepresent a frequency multiplication, f
1for 0/n mono-frequency multiplication f
n, f
2for 1/n mono-frequency multiplication f
n.
The computing method of the backlight mura value provided in conjunction with first aspect, the first preferred version of first aspect or first aspect the second preferred version, in the third preferred version of first aspect, described method also comprises:
Judge that whether display panel qualified according to described mura value, as described in mura value be greater than threshold value, be then judged as defective.
Second aspect, provide a kind of computing system of backlight mura value, described system comprises:
Sampling unit, for the brightness luminance matrix of the relative brightness relativeluminance curve and display panel that obtain display panel, the DC component removing relative luminance curve obtains the muramura component of relative luminance curve;
Multiplier unit, for calculating a frequency multiplication f according to the distance between measuring distance and the backlight backlight wick of display panel
n;
Converting unit, is converted to F (fx) for luminance square Array is DFT;
F (f
x)=[Lx1, Lx2...........Lxn]; Wherein,
Lx1 is 0/n harmonic, and Lx2 is 1/n harmonic, and Lxn is (n-1)/n harmonic, and n is the sampled point number of luminance square Array;
Superpositing unit, for by F (f
x) real part in matrix is added and imaginary part addition obtains matrix F
p(fx);
F
P(fx)＝|F
P(fx)
real|+|F
P(fx)
imag|
Wherein, F
p(fx)
realfor F (f
x) matrix real part, F
p(fx)
imagfor F (f
x) matrix imaginary part;
Computing unit, also for foundation matrix F
p(fx) and empirical constant calculate mura value.
In conjunction with the computing system of the backlight mura value that second aspect provides, in the first preferred version of second aspect, described computing unit is concrete, for:
By F
p(fx) substitute into the first preset formula and calculate mura value; This first preset formula is:
Q＝ΣF
p(fx)
JND＝Q/C；
Wherein, C is empirical constant, and JND is mura value.
In conjunction with the computing system of the backlight mura value that second aspect provides, in the second preferred version of second aspect, described computing unit is concrete, for:
CS is carried out to frequency multiplication matrix f and calculates CSF (f), by F
p(fx) and CSF (f) substitute into the second preset formula and calculate mura value; Described second preset formula is specially:
Q＝ΣF
p(fx)·CSF(f)
Wherein, CSF (f)=2.6* (0.0192+0.114*f) * exp (-(0.114*f) ^1.1))
JND＝Q/C；
Wherein, C is empirical constant, and f is frequency multiplication matrix, and JND is mura value;
f＝[f
1,f
2...........f
n]
Wherein, f
nrepresent a frequency multiplication, f
1for 0/n mono-frequency multiplication f
n, f
2for 1/n mono-frequency multiplication f
n.
The computing system of the backlight mura value provided in conjunction with second aspect, the first preferred version of second aspect or second aspect the second preferred version, in the third preferred version of second aspect, described system also comprises:
Judging unit, for judging that whether display panel qualified according to described mura value, as described in mura value be greater than threshold value, be then judged as defective.
The third aspect, provides a kind of pick-up unit, and described pick-up unit comprises the computing system of the backlight mura value that second aspect provides, the first preferred version of the third aspect, third aspect the second preferred version or the third preferred version of the third aspect.
According to the computing method of the backlight mura value that each embodiment provides, system and display panel, the respective embodiments described above mode by quantifying calculates mura value, mura value is calculated to this relative luminance curve and luminance matrix, the method is owing to being automatic account form, so without the need to artificial participation, so its to have efficiency high, the advantage that automaticity is high, and this mode also improves speed and the efficiency of detection display panel, and this mode is objective computation mode, do not need artificial participation, so its cost is low, shown by actual computation test, the mura value that the mura value that this calculates judges with artificial (experienced) is almost consistent, so it also has mura value calculate advantage accurately.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the wick arrangement schematic diagram of direct-light type LED backlight in prior art;
Fig. 2 be in prior art display panel at the Luminance Distribution schematic diagram of X-direction;
Fig. 3 is the process flow diagram of the computing method of backlight mura value in the present invention first better embodiment;
The relative luminance curve schematic diagram that Fig. 4 provides for the specific embodiment of the invention;
The relative luminance curve schematic diagram of the acquisition display panel that Fig. 5 provides for the specific embodiment of the invention;
Fig. 6 is the process flow diagram of the computing method of backlight mura value in the present invention second better embodiment;
The process flow diagram of the computing method of the backlight mura value that Fig. 7 provides for the present invention the 3rd better embodiment;
The computing system structural representation of the backlight mura value that Fig. 8 provides for the present invention the 4th better embodiment;
The structure of the detecting device schematic diagram that Fig. 9 provides for the specific embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Consult Fig. 3, the computing method of a kind of backlight mura value that Fig. 3 the present invention first better embodiment provides, the method can be performed by pick-up unit, this pick-up unit includes but not limited to: the intelligent detection equipments such as mobile phone, panel computer, computing machine, smart camera, as shown in Figure 3, the method comprises the steps:
Step S301, the relative brightness obtaining display panel are (English: (English: luminance) matrix, the DC component removing relative luminance curve obtains the mura component of relative luminance curve in the brightness of relativeluminance) curve and display panel;
The mode obtaining the relative luminance curve of display panel in above-mentioned steps S301 can have multiple, the obtain manner of the present invention first better embodiment to above-mentioned relative luminance curve does not limit, such as, in an embodiment of the present invention first better embodiment, CCD (English full name: Charge-coupledDevice can be passed through, Chinese is called for short: charge coupled cell) imageing sensor obtains relative luminance curve, certainly in another embodiment of the present invention first better embodiment, also relative luminance curve can be obtained by the mode of camera of the same trade or business.
The mode obtaining the luminance matrix of display panel in above-mentioned steps S301 also can have multiple, does not limit the concrete obtain manner of above-mentioned luminance matrix in the present invention first better embodiment.
The method that the DC component removing relative luminance curve in above-mentioned steps S301 obtains the mura component of relative luminance curve can have multiple, such as, in an embodiment of the present invention first better embodiment, can by downward for relative luminance curve translation to remove DC component, as shown in Figure 4, certainly in concrete practice, also other mode can be adopted, such as in another embodiment of the present invention first better embodiment, directly can deduct the value of the DC component of relative luminance curve.Certainly, in the other embodiment of the present invention first better embodiment, also other mode can be adopted to remove DC component, the present invention first better embodiment does not limit the above-mentioned mode removing DC component.
Step S302, (English: distance backlight) between wick calculates a frequency multiplication f according to the backlight of measuring distance and display panel
n;
In above-mentioned steps S302, measuring distance is specifically as follows, distance between pick-up unit and display panel, consult Fig. 5, a kind of schematic diagram obtaining the relative brightness of display panel provided that Fig. 5 is the better embodiment of the present invention first, wherein d2 is measuring distance, and d1 can for the distance between backlight lamp core (this wick generalized case is adjacent bright wick and concealed light core); Above-mentioned f
ni.e. 1/ θ (cycle/degree); The computing method of this θ can adopt the scheme of prior art to calculate, and such as, in an embodiment of the present invention first better embodiment, the mode of inverse trigonometric function can be adopted to calculate this θ; Certainly, in other embodiments of the present invention first better embodiment, also other mode can be adopted to calculate θ.The present invention first better embodiment does not limit to the computing method of above-mentioned θ.Above-mentioned cycle/degree is specifically as follows the unit of frequency multiplication.
Step S303, luminance square Array is done DFT (English full name: DiscreteFourierTransform.Chinese: discrete Fourier transformation) be converted to F (fx);
F (f
x)=[Lx1, Lx2...........Lxn]; Wherein,
Lx1 is 0/n harmonic, and Lx2 is 1/n harmonic, and Lxn is (n-1)/n harmonic, i.e. a harmonic, and this harmonic is namely to a frequency multiplication f
nharmonic is obtained after DFT conversion; N can be the sampled point number of luminance square Array.
Step S304, by F (f
x) real part in matrix is added and imaginary part addition obtains matrix F
p(fx);
F
P(fx)＝|F
P(fx)
real|+|F
P(fx)
imag|
Wherein, F
p(fx)
realcan be F (f
x) matrix real part, F
p(fx)
imagcan be F (f
x) matrix imaginary part.
In above-mentioned steps S304 | F
p(fx)
real| representing matrix F
p(fx) absolute value of real part, in above-mentioned steps S304 | F
p(fx)
imag| representing matrix F
p(fx) absolute value of imaginary part.
Step S305, foundation matrix F
p(fx) and empirical constant calculate mura value (i.e. JND value).
According to matrix F in above-mentioned steps S305
p(fx) and empirical constant calculate mura value and can have various ways, the mode of above-mentioned realization can see the concrete scheme of the concrete scheme of the present invention second better embodiment and the present invention the 3rd better embodiment.
Below in conjunction with accompanying drawing 1, the technique effect that the technical scheme of 2 pairs of the present invention first better embodiment reaches is described in detail, as shown in Figure 1, Fig. 1 is the wick arrangement schematic diagram of direct-light type LED backlight, as shown in Figure 2, Fig. 2 is the Luminance Distribution of display panel in X-direction, when the position close to wick, this position brightness can higher thus formed clear zone, due to away from wick position between two wicks, so brightness can lower thus formed dark space, so just on whole display panel, create bright secretly excessive mura, owing to mainly being produced by backlight, so be commonly referred to backlightmura.The method mode by quantifying that the present invention first better embodiment provides calculates mura value, mura value is calculated to this relative luminance curve and luminance matrix, the method is owing to being automatic account form, so without the need to artificial participation, so its to have efficiency high, the advantage that automaticity is high, and this mode also improves speed and the efficiency of detection display panel, and this mode is objective computation mode, do not need artificial participation, so its cost is low, shown by actual computation test, the mura value that the mura value that this calculates judges with artificial (experienced) is almost consistent, so it also has mura value calculate advantage accurately.
Step S306, judge that whether display panel is qualified according to this mura value.
The implementation of above-mentioned steps is specifically as follows, and this mura value is compared with threshold value, as this mura value is greater than this threshold value, judges that display panel is defective.It should be noted that, judge that the qualified needs of display panel realize by detecting many kinds of parameters, mura value is only a detected parameters lower than threshold value.
This technical scheme can improve the efficiency of display panel detection and improve automaticity, and can effectively reduce cost of labor and reduce error rate.
Consult Fig. 6, the computing method of a kind of backlight mura value that Fig. 6 the present invention second better embodiment provides, the method can have pick-up unit to realize, this pick-up unit includes but not limited to: the intelligent detection equipments such as mobile phone, panel computer, computing machine, smart camera, as shown in Figure 6, the method comprises the steps:
Step S601, the relative brightness obtaining display panel are (English: (English: luminance) matrix, the DC component removing relative luminance curve obtains the mura component of relative luminance curve in the brightness of relativeluminance) curve and display panel;
The mode obtaining the relative luminance curve of display panel in above-mentioned steps S601 can have multiple, the obtain manner of the present invention second better embodiment to above-mentioned relative luminance curve does not limit, such as, in an embodiment of the present invention second better embodiment, CCD (English full name: Charge-coupledDevice can be passed through, Chinese is called for short: charge coupled cell) imageing sensor obtains relative luminance curve, certainly in another embodiment of the present invention second better embodiment, also relative luminance curve can be obtained by the mode of camera of the same trade or business.
The mode obtaining the luminance matrix of display panel in above-mentioned steps S601 also can have multiple, does not limit the concrete obtain manner of above-mentioned luminance matrix in the present invention second better embodiment.
The method that the DC component removing relative luminance curve in above-mentioned steps S601 obtains the mura component of relative luminance curve can have multiple, such as, in an embodiment of the present invention second better embodiment, can by downward for relative luminance curve translation to remove DC component, as shown in Figure 4, certainly in concrete practice, also other mode can be adopted, such as in another embodiment of the present invention second better embodiment, directly can deduct the value of the DC component of relative luminance curve.Certainly, in the other embodiment of the present invention second better embodiment, also other mode can be adopted to remove DC component, the present invention second better embodiment does not limit the above-mentioned mode removing DC component.
Step S602, (English: distance backlight) between wick calculates a frequency multiplication f according to the backlight of measuring distance and display panel
n;
In above-mentioned steps S602, measuring distance is specifically as follows, distance between pick-up unit and display panel, consult Fig. 5, a kind of method obtaining the relative brightness of display panel provided that Fig. 5 is the better embodiment of the present invention second, wherein d2 is measuring distance, and d1 can for the distance between backlight lamp core (this wick generalized case is adjacent bright wick and concealed light core); Above-mentioned f
ni.e. 1/ θ (cycle/degree); The computing method of this θ can adopt the scheme of prior art to calculate, and such as, in an embodiment of the present invention second better embodiment, the mode of inverse trigonometric function can be adopted to calculate this θ; Certainly, in other embodiments of the present invention second better embodiment, also other mode can be adopted to calculate θ.The present invention second better embodiment does not limit to the computing method of above-mentioned θ.Above-mentioned cycle/degree is specifically as follows the unit of frequency multiplication.
Step S603, luminance square Array is done DFT (English full name: DiscreteFourierTransform.Chinese: discrete Fourier transformation) be converted to F (fx);
F (f
x)=[Lx1, Lx2...........Lxn]; Wherein,
Lx1 is 0/n harmonic, and Lx2 is 1/n harmonic, and Lxn is (n-1)/n harmonic, i.e. a harmonic, and this harmonic is namely to a frequency multiplication f
nharmonic is obtained after DFT conversion; N can be the sampled point number of luminance square Array.
Step S604, by F (f
x) real part in matrix is added and imaginary part addition obtains matrix F
p(fx);
F
P(fx)＝|F
P(fx)
real|+|F
P(fx)
imag|
Wherein, F
p(fx)
realcan be F (f
x) matrix real part, F
p(fx)
imagcan be F (f
x) matrix imaginary part.
In above-mentioned steps S604 | F
p(fx)
real| representing matrix F
p(fx) absolute value of real part, in above-mentioned steps S604 | F
p(fx)
imag| representing matrix F
p(fx) absolute value of imaginary part.
Step S605, by F
p(fx) first formula preset that substitutes into calculates mura value; This first preset formula is specifically as follows:
Q＝ΣF
p(fx)
JND＝Q/C；
Wherein, C is empirical constant.
In above-mentioned steps S605, the value of empirical constant C can by producer's sets itself, such as in an embodiment of the present invention second better embodiment, C setting can be become 2000, certainly in another embodiment of the present invention second better embodiment, C can be set as 2100 or other numerical value, Σ F in above-mentioned formula
p(fx) can representing matrix F
p(fx) all real part absolute values and all imaginary part absolute values and.
In above-mentioned steps S605, JDN represents mura value, and its concrete account form, as Q is calculated as 2000, supposes C=2000, then JND=2000/2000=1; As Q is calculated as 3000, then JND=3000/2000=1.5.
Below in conjunction with accompanying drawing 1, the technique effect that the technical scheme of 2 pairs of the present invention second better embodiment reaches is described in detail, as shown in Figure 1, Fig. 1 is the wick arrangement schematic diagram of direct-light type LED backlight, as shown in Figure 2, Fig. 2 is the Luminance Distribution of display panel in X-direction, when the position close to wick, this position brightness can higher thus formed clear zone, due to away from wick position between two wicks, so brightness can lower thus formed dark space, so just on whole display panel, create bright secretly excessive mura, owing to mainly being produced by backlight, so be commonly referred to backlightmura.The method mode by quantifying that the present invention second better embodiment provides calculates mura value, carries out process obtain matrix F to this relative luminance curve and luminance matrix
p(fx), this matrix F
p(fx) real part and imaginary part can embody mura value, this real parts all and imaginary part are added up mutually and namely can be calculated mura value divided by empirical constant, the method is owing to being automatic account form, so without the need to artificial participation, so its to have efficiency high, the advantage that automaticity is high, and this mode also improves speed and the efficiency of detection display panel, and this mode is objective computation mode, do not need artificial participation, so its cost is low, shown by actual computation test, the mura value that the mura value that this calculates judges with artificial (experienced) is almost consistent, so it also has mura value calculate advantage accurately.
Step S606, judge that whether display panel is qualified according to this mura value.
The implementation of above-mentioned steps is specifically as follows, and this mura value is compared with threshold value, as this mura value is greater than this threshold value, judges that display panel is defective.It should be noted that, judge that the qualified needs of display panel realize by detecting many kinds of parameters, mura value is only a detected parameters lower than threshold value.
This technical scheme can improve the efficiency of display panel detection and improve automaticity, and can effectively reduce cost of labor and reduce error rate.
Consult Fig. 7, the computing method of a kind of backlight mura value that Fig. 7 the present invention the 3rd better embodiment provides, the method can have pick-up unit to realize, this pick-up unit includes but not limited to: the intelligent detection equipments such as mobile phone, panel computer, computing machine, smart camera, as shown in Figure 7, the method comprises the steps:
Step S701, the relative brightness obtaining display panel are (English: (English: luminance) matrix, the DC component removing relative luminance curve obtains the mura component of relative luminance curve in the brightness of relativeluminance) curve and display panel;
The mode obtaining the relative luminance curve of display panel in above-mentioned steps S701 can have multiple, the obtain manner of the present invention the 3rd better embodiment to above-mentioned relative luminance curve does not limit, such as, in an embodiment of the present invention the 3rd better embodiment, CCD (English full name: Charge-coupledDevice can be passed through, Chinese is called for short: charge coupled cell) imageing sensor obtains relative luminance curve, certainly in another embodiment of the present invention the 3rd better embodiment, also relative luminance curve can be obtained by the mode of camera of the same trade or business.
The mode obtaining the luminance matrix of display panel in above-mentioned steps S701 also can have multiple, does not limit the concrete obtain manner of above-mentioned luminance matrix in the present invention the 3rd better embodiment.
The method that the DC component removing relative luminance curve in above-mentioned steps S701 obtains the mura component of relative luminance curve can have multiple, such as, in an embodiment of the present invention the 3rd better embodiment, can by downward for relative luminance curve translation to remove DC component, as shown in Figure 4, certainly in concrete practice, also other mode can be adopted, such as in another embodiment of the present invention the 3rd better embodiment, directly can deduct the value of the DC component of relative luminance curve.Certainly, in the other embodiment of the present invention the 3rd better embodiment, also other mode can be adopted to remove DC component, the present invention the 3rd better embodiment does not limit the above-mentioned mode removing DC component.
Step S702, (English: distance backlight) between wick calculates a frequency multiplication f according to the backlight of measuring distance and display panel
n;
In above-mentioned steps S702, measuring distance is specifically as follows, distance between pick-up unit and display panel, consult Fig. 5, a kind of method obtaining the relative brightness of display panel provided that Fig. 5 is the better embodiment of the present invention second, wherein d2 is measuring distance, and d1 can for the distance between backlight lamp core (this wick generalized case is adjacent bright wick and concealed light core); Above-mentioned f
1i.e. 1/ θ (cycle/degree); The computing method of this θ can adopt the scheme of prior art to calculate, and such as, in an embodiment of the present invention second better embodiment, the mode of inverse trigonometric function can be adopted to calculate this θ; Certainly, in other embodiments of the present invention second better embodiment, also other mode can be adopted to calculate θ.The present invention second better embodiment does not limit to the computing method of above-mentioned θ.Above-mentioned cycle/degree is specifically as follows the unit of frequency multiplication.
Step S703, luminance square Array is done DFT (English full name: DiscreteFourierTransform.Chinese: discrete Fourier transformation) be converted to F (fx);
F (f
x)=[Lx1, Lx2...........Lxn]; Wherein,
Lx1 is 0/n harmonic, and Lx2 is 1/n harmonic, and Lxn is (n-1)/n harmonic, i.e. a harmonic, and this harmonic is namely to a frequency multiplication f
1harmonic is obtained after DFT conversion; N can be the sampled point number of luminance square Array.
Step S704, by F (f
x) real part in matrix is added and imaginary part addition obtains matrix F
p(fx);
F
P(fx)＝|F
P(fx)
real|+|F
P(fx)
imag|
Wherein, F
p(fx)
realcan be F (f
x) matrix real part, F
p(fx)
imagcan be F (f
x) matrix imaginary part.
In above-mentioned steps S704 | F
p(fx)
real| representing matrix F
p(fx) absolute value of real part, in above-mentioned steps S604 | F
p(fx)
imag| representing matrix F
p(fx) absolute value of imaginary part.
Step S705, frequency multiplication matrix f carried out to CSF (English full name: ContrastSensitivityFunction, Chinese: contrast sensitivity function) and calculate CSF (f), by F
p(fx) and CSF (f) substitute into second preset formulae discovery obtain mura value; This second preset formula is specifically as follows:
Q＝ΣF
p(fx)·CSF(f)
Wherein, CSF (f)=2.6* (0.0192+0.114*f) * exp (-(0.114*f) ^1.1))
JND＝Q/C；
Wherein, C is empirical constant, and f is frequency multiplication matrix.
Frequency multiplication matrix f in above-mentioned steps S705 can according to a frequency multiplication f
nobtain, this frequency multiplication matrix f is specifically as follows:
f＝[f
1,f
2...........f
n]；
Wherein, f
nrepresent a frequency multiplication, f
1can be 0/n mono-frequency multiplication f
n, f
2can be 1/n mono-frequency multiplication f
n.
In above-mentioned steps S705, the value of empirical constant C can by producer's sets itself, such as in an embodiment of the present invention the 3rd better embodiment, C setting can be become 2000, certainly in another embodiment of the present invention the 3rd better embodiment, C can be set as 2100 or other numerical value, Σ F in above-mentioned formula
p(fx) can representing matrix F
p(fx) all real part absolute values and all imaginary part absolute values and.
In above-mentioned steps S705, JDN represents mura value, and its concrete account form, as Q is calculated as 2000, supposes C=2000, then JND=2000/2000=1; As Q is calculated as 3000, then JND=3000/2000=1.5.
Below in conjunction with accompanying drawing 1, the technique effect that the technical scheme of 2 pairs of the present invention the 3rd better embodiment reaches is described in detail, as shown in Figure 1, Fig. 1 is the wick arrangement schematic diagram of direct-light type LED backlight, as shown in Figure 2, Fig. 2 is the Luminance Distribution of display panel in X-direction, when the position close to wick, this position brightness can higher thus formed clear zone, due to away from wick position between two wicks, so brightness can lower thus formed dark space, so just on whole display panel, create bright secretly excessive mura, owing to mainly being produced by backlight, so be commonly referred to backlightmura.The method mode by quantifying that the present invention second better embodiment provides calculates mura value, carries out process obtain matrix F to this relative luminance curve and luminance matrix
p(fx), this matrix F
p(fx) real part and imaginary part can embody mura value, obtain CSF (f), by CSF (f) and F after carrying out CSF process to frequency multiplication matrix f
p(fx) get and more can embody mura value accurately, the method is owing to being automatic account form, so without the need to artificial participation, so its to have efficiency high, the advantage that automaticity is high, and this mode also improves speed and the efficiency of detection display panel, and this mode is objective computation mode, do not need artificial participation, so its cost is low, shown by actual computation test, the mura value that the mura value that this calculates judges with artificial (experienced) is almost consistent, so it also has mura value calculate advantage accurately.
Step S706, judge that whether display panel is qualified according to this mura value.
The implementation of above-mentioned steps is specifically as follows, and this mura value is compared with threshold value, as this mura value is greater than this threshold value, judges that display panel is defective.It should be noted that, judge that the qualified needs of display panel realize by detecting many kinds of parameters, mura value is only a detected parameters lower than threshold value.
This technical scheme can improve the efficiency of display panel detection and improve automaticity, and can effectively reduce cost of labor and reduce error rate.
Consult Fig. 8, the computing system 800 of a kind of backlight mura value that Fig. 8 provides for the present invention the 4th better embodiment, said system can be integrated or be arranged on intelligent detection equipment, such as, install on the computer or server, as shown in Figure 8, this system specifically can comprise:
Sampling unit 801, for the brightness luminance matrix of the relative brightness relativeluminance curve and display panel that obtain display panel, the DC component removing relative luminance curve obtains the muramura component of relative luminance curve;
The mode obtaining the relative luminance curve of display panel in above-mentioned sampling unit 801 can have multiple, the obtain manner of the present invention the 4th better embodiment to above-mentioned relative luminance curve does not limit, such as, in an embodiment of the present invention the 4th better embodiment, CCD (English full name: Charge-coupledDevice can be passed through, Chinese is called for short: charge coupled cell) imageing sensor obtains relative luminance curve, certainly in another embodiment of the present invention the 4th better embodiment, also relative luminance curve can be obtained by the mode of camera of the same trade or business.
The mode obtaining the luminance matrix of display panel in above-mentioned sampling unit 801 also can have multiple, does not limit the concrete obtain manner of above-mentioned luminance matrix in the present invention first better embodiment.
The method that the DC component removing relative luminance curve in above-mentioned sampling unit 801 obtains the mura component of relative luminance curve can have multiple, such as, in an embodiment of the present invention the 4th better embodiment, can by downward for relative luminance curve translation to remove DC component, as shown in Figure 4, certainly in concrete practice, also other mode can be adopted, such as in another embodiment of the present invention the 4th better embodiment, directly can deduct the value of the DC component of relative luminance curve.Certainly, in the other embodiment of the present invention first better embodiment, also other mode can be adopted to remove DC component, the present invention the 4th better embodiment does not limit the above-mentioned mode removing DC component.
Multiplier unit 802, for calculating a frequency multiplication f according to the distance between measuring distance and the backlight backlight wick of display panel
n;
In above-mentioned multiplier unit 802, measuring distance is specifically as follows, distance between pick-up unit and display panel, consult Fig. 5, a kind of method obtaining the relative brightness of display panel provided that Fig. 5 is the better embodiment of the present invention the 4th, wherein d2 is measuring distance, and d1 can for the distance between backlight lamp core (this wick generalized case is adjacent bright wick and concealed light core); Above-mentioned f
ni.e. 1/ θ (cycle/degree); The computing method of this θ can adopt the scheme of prior art to calculate, and such as, in an embodiment of the present invention the 4th better embodiment, the mode of inverse trigonometric function can be adopted to calculate this θ; Certainly, in other embodiments of the present invention the 4th better embodiment, also other mode can be adopted to calculate θ.The present invention the 4th better embodiment does not limit to the computing method of above-mentioned θ.Above-mentioned cycle/degree is specifically as follows the unit of frequency multiplication.
Converting unit 803, is converted to F (fx) for luminance square Array is DFT;
F (f
x)=[Lx1, Lx2...........Lxn]; Wherein,
Lx1 is 0/n harmonic, and Lx2 is 1/n harmonic, and Lxn is (n-1)/n harmonic, and n is the sampled point number of luminance square Array;
Superpositing unit 804, for by F (f
x) real part in matrix is added and imaginary part addition obtains matrix F
p(fx);
F
P(fx)＝|F
P(fx)
real|+|F
P(fx)
imag|
Wherein, F
p(fx)
realfor F (f
x) matrix real part, F
p(fx)
imagfor F (f
x) matrix imaginary part;
In above-mentioned superpositing unit 804 | F
p(fx)
real| representing matrix F
p(fx) absolute value of real part, in above-mentioned steps S304 | F
p(fx)
imag| representing matrix F
p(fx) absolute value of imaginary part.
Computing unit 805, also for foundation matrix F
p(fx) and empirical constant calculate mura value.
Preferably, computing unit 805 is concrete, for:
By F
p(fx) substitute into the first preset formula and calculate mura value; This first preset formula is:
Q＝ΣF
p(fx)
JND＝Q/C；
Wherein, C is empirical constant, and JND is mura value.
In above-mentioned computing unit 805, the value of empirical constant C can by producer's sets itself, such as in an embodiment of the present invention the 4th better embodiment, C setting can be become 2000, certainly in another embodiment of the present invention the 4th better embodiment, C can be set as 2100 or other numerical value, Σ F in above-mentioned formula
p(fx) can representing matrix F
p(fx) all real part absolute values and all imaginary part absolute values and.
In above-mentioned computing unit 805, JDN represents mura value, and its concrete account form, as Q is calculated as 2000, supposes C=2000, then JND=2000/2000=1; As Q is calculated as 3000, then JND=3000/2000=1.5.
Preferably, computing unit 805 is concrete, for:
CS is carried out to frequency multiplication matrix f and calculates CSF (f), by F
p(fx) and CSF (f) substitute into the second preset formula and calculate mura value; Described second preset formula is specially:
Q＝ΣF
p(fx)·CSF(f)
Wherein, CSF (f)=2.6* (0.0192+0.114*f) * exp (-(0.114*f) ^1.1))
JND＝Q/C；
Wherein, C is empirical constant, and f is frequency multiplication matrix, and JND is mura value;
f＝[f
1,f
2...........f
n]
Wherein, f
nrepresent a frequency multiplication, f
1for 0/n mono-frequency multiplication f
n, f
2for 1/n mono-frequency multiplication f
n.
Frequency multiplication matrix f in above-mentioned computing unit 805 can according to a frequency multiplication f
nobtain, this frequency multiplication matrix f is specifically as follows:
f＝[f
1,f
2...........f
n]；
Wherein, f
nrepresent a frequency multiplication, f
1can be 0/n mono-frequency multiplication f
n, f
2can be 1/n mono-frequency multiplication f
n.
In above-mentioned computing unit 805, the value of empirical constant C can by producer's sets itself, such as in an embodiment of the present invention the 3rd better embodiment, C setting can be become 2000, certainly in another embodiment of the present invention the 3rd better embodiment, C can be set as 2100 or other numerical value, Σ F in above-mentioned formula
p(fx) can representing matrix F
p(fx) all real part absolute values and all imaginary part absolute values and.
In above-mentioned computing unit 805, JDN represents mura value, and its concrete account form, as Q is calculated as 2000, supposes C=2000, then JND=2000/2000=1; As Q is calculated as 3000, then JND=3000/2000=1.5.
Preferably, said system can also comprise:
Judging unit 806, for judging that whether display panel qualified according to described mura value, as described in mura value be greater than threshold value, be then judged as defective.
It should be noted that, judge that the qualified needs of display panel realize by detecting many kinds of parameters, mura value is only a detected parameters lower than threshold value.
Consult Fig. 9, Fig. 9 specific embodiment of the invention also provides a kind of pick-up unit 900, and above-mentioned detection device comprises the computing system 800 of backlight mura value.The concrete structure of the computing system of this backlight mura value see the description of the present invention the 4th better embodiment, can repeat no more here.
It should be noted that, for aforesaid each method embodiment or embodiment, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, embodiment described in instructions or embodiment all belong to preferred embodiment, and involved action and unit might not be that the present invention is necessary.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
Step in embodiment of the present invention method can be carried out order according to actual needs and be adjusted, merges and delete.
Unit in embodiment of the present invention device can carry out merging, divide and deleting according to actual needs.The feature of the different embodiment described in this instructions and different embodiment can carry out combining or combining by those skilled in the art.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention can use hardware implementing, or firmware realizes, or their array mode realizes.When implemented in software, above-mentioned functions can be stored in computer-readable medium or as the one or more instruction on computer-readable medium or code and transmit.Computer-readable medium comprises computer-readable storage medium and communication media, and wherein communication media comprises any medium being convenient to transmit computer program from a place to another place.Storage medium can be any usable medium that computing machine can access.As example but be not limited to: computer-readable medium can comprise random access memory (RandomAccessMemory, RAM), ROM (read-only memory) (Read-OnlyMemory, ROM), EEPROM (Electrically Erasable Programmable Read Only Memo) (ElectricallyErasableProgrammableRead-OnlyMemory, EEPROM), read-only optical disc (CompactDiscRead-OnlyMemory, or other optical disc storage CD-ROM), magnetic disk storage medium or other magnetic storage apparatus, or the program code that can be used in carrying or storing the expectation with instruction or data structure form also can by any other medium of computer access.In addition.Any connection can be suitable become computer-readable medium.Such as, if software uses concentric cable, optical fiber cable, twisted-pair feeder, Digital Subscriber Line (DigitalSubscriberLine, DSL) or the wireless technology of such as infrared ray, radio and microwave and so on from website, server or other remote source, so the wireless technology of concentric cable, optical fiber cable, twisted-pair feeder, DSL or such as infrared ray, wireless and microwave and so on be included in affiliated medium fixing in.As used in the present invention, dish (Disk) and dish (disc) comprise compression laser disc (CD), laser dish, laser disc, Digital Versatile Disc (DVD), floppy disk and Blu-ray Disc, the usual magnetic of its mid-game copy data, what dish then carried out optics with laser copies data.Combination above also should be included within the protection domain of computer-readable medium.
In a word, the foregoing is only the preferred embodiment of technical solution of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. computing method for backlight mura value, is characterized in that, described method comprises the steps:
Obtain the relative brightness relativeluminance curve of display panel and the brightness luminance matrix of display panel, the DC component removing relative luminance curve obtains the muramura component of relative luminance curve;
A frequency multiplication f is calculated according to the distance between measuring distance and the backlight backlight wick of display panel
n;
Luminance square Array is DFT and is converted to F (fx);
F (f
x)=[Lx1, Lx2...........Lxn]; Wherein,
Lx1 is 0/n harmonic, and Lx2 is 1/n harmonic, and Lxn is (n-1)/n harmonic, and n is the sampled point number of luminance square Array;
By F (f
x) real part in matrix is added and imaginary part addition obtains matrix F
p(fx);
F
P(fx)＝|F
P(fx)
real|+|F
P(fx)
imag|
Wherein, F
p(fx)
realfor F (f
x) matrix real part, F
p(fx)
imagfor F (f
x) matrix imaginary part;
According to matrix F
p(fx) and empirical constant calculate mura value.
2. method according to claim 1, is characterized in that, described according to matrix F
p(fx) and empirical constant to calculate mura value concrete, comprising:
By F
p(fx) substitute into the first preset formula and calculate mura value; This first preset formula is:
Q＝ΣF
p(fx)
JND＝Q/C；
Wherein, C is empirical constant, and JND is mura value.
3. method according to claim 1, is characterized in that, described according to matrix F
p(fx) and empirical constant to calculate mura value concrete, comprising:
CS is carried out to frequency multiplication matrix f and calculates CSF (f), by F
p(fx) and CSF (f) substitute into the second preset formula and calculate mura value; Described second preset formula is specially:
Q＝ΣF
p(fx)·CSF(f)
Wherein, CSF (f)=2.6* (0.0192+0.114*f) * exp (-(0.114*f) ^1.1))
JND＝Q/C；
Wherein, C is empirical constant, and f is frequency multiplication matrix, and JND is mura value;
f＝[f
1,f
2...........f
n]
Wherein, f
nrepresent a frequency multiplication, f
1for 0/n mono-frequency multiplication f
n, f
2for 1/n mono-frequency multiplication f
n.
4., according to the arbitrary described method of claim 1-3, it is characterized in that, described method also comprises:
Judge that whether display panel qualified according to described mura value, as described in mura value be greater than threshold value, be then judged as defective.
5. a computing system for backlight mura value, is characterized in that, described system comprises:
Sampling unit, for the brightness luminance matrix of the relative brightness relativeluminance curve and display panel that obtain display panel, the DC component removing relative luminance curve obtains the muramura component of relative luminance curve;
Multiplier unit, for calculating a frequency multiplication f according to the distance between measuring distance and the backlight backlight wick of display panel
n;
Converting unit, is converted to F (fx) for luminance square Array is DFT;
F (f
x)=[Lx1, Lx2...........Lxn]; Wherein,
Lx1 is 0/n harmonic, and Lx2 is 1/n harmonic, and Lxn is (n-1)/n harmonic, and n is the sampled point number of luminance square Array;
Superpositing unit, for by F (f
x) real part in matrix is added and imaginary part addition obtains matrix F
p(fx);
F
P(fx)＝|F
P(fx)
real|+|F
P(fx)
imag|
Wherein, F
p(fx)
realfor F (f
x) matrix real part, F
p(fx)
imagfor F (f
x) matrix imaginary part;
Computing unit, also for foundation matrix F
p(fx) and empirical constant calculate mura value.
6. system according to claim 5, is characterized in that, described computing unit is concrete, for:
By F
p(fx) substitute into the first preset formula and calculate mura value; This first preset formula is:
Q＝ΣF
p(fx)
JND＝Q/C；
Wherein, C is empirical constant, and JND is mura value.
7. system according to claim 5, is characterized in that, described computing unit is concrete, for:
CS is carried out to frequency multiplication matrix f and calculates CSF (f), by F
p(fx) and CSF (f) substitute into the second preset formula and calculate mura value; Described second preset formula is specially:
Q＝ΣF
p(fx)·CSF(f)
Wherein, CSF (f)=2.6* (0.0192+0.114*f) * exp (-(0.114*f) ^1.1))
JND＝Q/C；
Wherein, C is empirical constant, and f is frequency multiplication matrix, and JND is mura value;
f＝[f
1,f
2...........f
n]
Wherein, f
nrepresent a frequency multiplication, f
1for 0/n mono-frequency multiplication f
n, f
2for 1/n mono-frequency multiplication f
n.
8., according to the arbitrary described system of claim 5-7, it is characterized in that, described system also comprises:
Judging unit, for judging that whether display panel qualified according to described mura value, as described in mura value be greater than threshold value, be then judged as defective.
9. a pick-up unit, is characterized in that, described pick-up unit comprise as arbitrary in claim 5-8 as described in the computing system of backlight mura value.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106328053A (en) * | 2016-10-19 | 2017-01-11 | 深圳市华星光电技术有限公司 | Maximum luminance optimization method and device in OLED Mura compensation |
| CN106991987A (en) * | 2017-05-15 | 2017-07-28 | 深圳市华星光电技术有限公司 | The method that lifting obtains the original mura degrees of accuracy of LCD |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100166332A1 (en) * | 2008-12-31 | 2010-07-01 | Postech Academy - Industry Foundation | Methods of deblurring image and recording mediums having the same recorded thereon |
| CN102254185A (en) * | 2011-07-21 | 2011-11-23 | 西安电子科技大学 | Background clutter quantizing method based on contrast ratio function |
| CN102855856A (en) * | 2012-08-30 | 2013-01-02 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal display and driving method for eliminating Mura thereof |
-
2015
- 2015-11-26 CN CN201510834041.5A patent/CN105512461B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100166332A1 (en) * | 2008-12-31 | 2010-07-01 | Postech Academy - Industry Foundation | Methods of deblurring image and recording mediums having the same recorded thereon |
| CN102254185A (en) * | 2011-07-21 | 2011-11-23 | 西安电子科技大学 | Background clutter quantizing method based on contrast ratio function |
| CN102855856A (en) * | 2012-08-30 | 2013-01-02 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal display and driving method for eliminating Mura thereof |
Non-Patent Citations (1)
| Title |
|---|
| LI-XUAN CHEN ET AL.: "A New Method for Hot-Spot and Mura Quantification and Evaluation in LCD Backlight Units and Panel", 《SID SYMPOSIUM DIGEST OF TECHNICAL PAPERS》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106328053A (en) * | 2016-10-19 | 2017-01-11 | 深圳市华星光电技术有限公司 | Maximum luminance optimization method and device in OLED Mura compensation |
| CN106991987A (en) * | 2017-05-15 | 2017-07-28 | 深圳市华星光电技术有限公司 | The method that lifting obtains the original mura degrees of accuracy of LCD |
| CN106991987B (en) * | 2017-05-15 | 2019-10-11 | 深圳市华星光电技术有限公司 | Promote the method for obtaining the original mura accuracy of LCD panel |
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