CN106023954B - A kind of bearing calibration of display device gray-scale intensity and coloration - Google Patents

A kind of bearing calibration of display device gray-scale intensity and coloration Download PDF

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CN106023954B
CN106023954B CN201610382636.6A CN201610382636A CN106023954B CN 106023954 B CN106023954 B CN 106023954B CN 201610382636 A CN201610382636 A CN 201610382636A CN 106023954 B CN106023954 B CN 106023954B
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formula
voltage
penetrance
target
white
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CN106023954A (en
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林新泉
吴建生
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Tianma Microelectronics Co Ltd
Xiamen Tianma Microelectronics Co Ltd
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Tianma Microelectronics Co Ltd
Xiamen Tianma Microelectronics Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G09G5/06—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed using colour palettes, e.g. look-up tables

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  • Physics & Mathematics (AREA)
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  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

A kind of bearing calibration of display device gray-scale intensity and coloration, including：Obtain display device red picture, green picture, blue picture, white picture and black picture tristimulus values；Establish the relational expression of the n-th grey menu tristimulus values and red picture, green picture, blue picture, white picture and black picture tristimulus values；According to relation reality penetrance formula；The tristimulus values for sampling multiple grey menus obtains sampled voltage penetrance data using sampling tristimulus values and penetrance formula, and then obtains voltage penetration rate table；According to target gamma value, target colorimetric, white picture tristimulus values, black picture tristimulus values and relational expression, the target penetration rate of set-point is acquired；Target voltage values are obtained according to voltage penetration rate table；According to target voltage values, the target register value of set-point is set.The bearing calibration can not only shorten correction time, and can improve the calibration result of each display device, improve the display quality of display device.

Description

A kind of bearing calibration of display device gray-scale intensity and coloration
Technical field
The present invention relates to display field more particularly to a kind of bearing calibrations of display device gray scale intensities and coloration.
Background technology
The picture that display device is shown is made of many small pixels.For colour display device, each pixel Three sub-pixel of red, green, blue color is generally included again.The luminance information of each sub-pixel is contained in picture signal.By display The processing conversion of device shows as the brightness of each sub-pixel.Three sub-pixels, which shine to mix, is just demonstrated by difference seen in human eye Brightness and color.
Due to luminance information and brightness do not correspond to linearly and display device monomer between difference, existing display device Major part is required for being arranged by adjusting inside, to adjust the brightness that same luminance information is finally shown, this adjustment one As be known as gamma correction.If doing different degrees of adjustment to three sub-pixel of red, green, blue, so that it may show color effect to change Fruit, this adjustment are commonly referred to as three gamma corrections.(correction) is adjusted by three gamma corrections, so that it may to obtain satisfied grayscale mistake It crosses and color representation.
Existing major part display device can carry out gamma correction or three gamma corrections in manufacture to each, make every Platform display device gray-scale intensity (luminance transition) and coloration (color) performance reach optimum efficiency.I.e. existing most of display dress It sets before manufacture, needs to be adjusted its gray-scale intensity and coloration, so that display device reaches best display effect.At present Existing method of adjustment mainly using manually adjusting, i.e., it is artificial rule of thumb and using a little auxiliary tools to display device into Row adjustment, time-consuming for this method of adjustment so that the production efficiency of display device reduces.For example, gamma correction is arranged, one As need dozens of minutes, if carrying out three gamma corrections, or even need several hours.
Invention content
To solve the above problems, the present invention provides a kind of bearing calibration of display device gray-scale intensity and coloration, including：It obtains Display device red picture tristimulus values is taken, with (XRed, YRed, ZRed) indicate；Display device green picture tristimulus values is obtained, With (XGreen, YGreen, ZGreen) indicate；Display device blue picture tristimulus values is obtained, with (XBlue, YBlue, ZBlue) indicate；It obtains Display device white picture tristimulus values is taken, with (XWhite, YWhite, ZWhite) indicate；Obtain display device black picture tristimulus Value, with (XBlack, YBlack, ZBlack) indicate；Using (Xn, Yn, Zn) indicate display device the n-th grey menu tristimulus values, n 0 To the random natural number between M, M is the highest grayscale exponent number of display device, and M is the natural number more than 2；According to CIE1931- XyY standard colorimetric systems, Y in the n-th grey menu tristimulus valuesnFor brightness；Establish (XRed, YRed, ZRed)、(XGreen, YGreen, ZGreen)、(XBlue, YBlue, ZBlue)、(XBlack, YBlack, ZBlack) and (Xn, Yn, Zn) between relational expression；According to the relational expression Establish penetrance formula；The tristimulus values for sampling multiple grey menus is obtained using sampling tristimulus values and the penetrance formula To sampled voltage-penetrance data, expansion calculating is carried out to the sampled voltage-penetrance data, obtains voltage-penetrance Table；According to target gamma value, target colorimetric, (XWhite, YWhite, ZWhite)、(XBlack, YBlack, ZBlack) and the relational expression, it asks Obtain the target penetration rate of set-point；The corresponding target voltage of the target penetration rate is found in the voltage-penetrance table Value, or the corresponding target voltage values of the target penetration rate are calculated according to the voltage-penetrance meter；According to the target The target register value of the set-point is arranged in voltage value.
To solve the above problems, the present invention provides the bearing calibration of another display device gray-scale intensity and coloration, packet It includes：Display device red picture tristimulus values is obtained, with (XRed, YRed, ZRed) indicate；Display device green picture three is obtained to pierce Value is swashed, with (XGreen, YGreen, ZGreen) indicate；Display device blue picture tristimulus values is obtained, with (XBlue, YBlue, ZBlue) table Show；Display device white picture tristimulus values is obtained, with (XWhite, YWhite, ZWhite) indicate；Using (Xn, Yn, Zn) indicate display Device the n-th grey menu tristimulus values, n are 0 to the random natural number between M, and M is the highest grayscale exponent number of display device, and M is Natural number more than 2；According to CIE1931-xyY standard colorimetric systems, Y in the n-th grey menu tristimulus valuesnFor brightness；It builds Vertical (XRed, YRed, ZRed)、(XGreen, YGreen, ZGreen)、(XBlue, YBlue, ZBlue) and (Xn, Yn, Zn) between relational expression；According to The relation reality penetrance formula；The tristimulus values for sampling multiple grey menus using sampling tristimulus values and described is worn Saturating rate formula obtains sampled voltage-penetrance data, carries out expansion calculating to the sampled voltage-penetrance data, obtains electricity Pressure-penetrance table；According to target gamma value, target colorimetric, (XWhite, YWhite, ZWhite) and the relational expression, acquire set-point Target penetration rate；The corresponding target voltage values of the target penetration rate, Huo Zhegen are found in the voltage-penetrance table The corresponding target voltage values of the target penetration rate are calculated according to the voltage-penetrance meter；According to the target voltage values, if Set the target register value of the set-point.
Compared with prior art, technical scheme of the present invention has the following advantages：
In technical scheme of the present invention, (generally include red picture, green picture, blue to draw by specific grey-scale picture Face and white picture may include black picture) tristimulus values, establish these specific grey-scale picture tristimulus values and any one The relational expression of n-th grey menu tristimulus values, to establish penetrance formula.Also, in a subsequent step, using again The mode for sampling the tristimulus values of multiple arbitrary grey menus obtains multigroup sampling tristimulus values, and utilizes sampling tristimulus values Sampled voltage-penetrance data are obtained with the penetrance formula, expansion meter is carried out to the sampled voltage-penetrance data It calculates, obtains voltage-penetrance table.During this, what it is due to sampling is that multiple arbitrary grayscale of each display device itself are drawn Face tristimulus values, therefore finally obtained voltage-penetrance table embodies the characteristic of display device itself.Therefore, later use When this voltage-penetrance table is corrected, it can ensure that correction accuracy is higher, to make the display quality after display device correction It improves.Meanwhile during this, the mode expanded and calculated is utilized, shortens to obtain the time of voltage-penetrance table, to Corresponding correction time can be shortened.
Description of the drawings
Fig. 1 is the test sample gamma curve that existing bearing calibration obtains；
Fig. 2 is grayscale-chromaticity coordinates relational graph (color coordinate characteristics curve) that existing bearing calibration obtains；
Fig. 3 is that the different product highest grayscale that existing bearing calibration obtains corresponds to chromaticity coordinates value；
Fig. 4 is each steps flow chart schematic diagram of bearing calibration provided in an embodiment of the present invention；
Fig. 5 is the step schematic diagram that step S14 includes in flow diagram shown in Fig. 4；
Fig. 6 is the step schematic diagram that step S15 includes in flow diagram shown in Fig. 4；
Fig. 7 is the test sample gamma curve that bearing calibration of the embodiment of the present invention obtains；
Fig. 8 is grayscale-chromaticity coordinates relational graph that bearing calibration of the embodiment of the present invention obtains；
Fig. 9 is that the different product highest grayscale that bearing calibration of the embodiment of the present invention obtains corresponds to chromaticity coordinates value；
Figure 10 is each steps flow chart schematic diagram of bearing calibration that another embodiment of the present invention provides；
Figure 11 is the step schematic diagram that step S24 includes in flow diagram shown in Figure 10；
Figure 12 is the step schematic diagram that step S25 includes in flow diagram shown in Figure 10.
Specific implementation mode
In existing method, the adjustment that identical correction setting is all carried out to every a collection of display device is also taken, i.e.,：To same a batch Display device is all stored in (burned) with group corrected value.However, due to technique unstability and other differences, even if with a batch display In device, there is also differences for the display effect of different display devices.At this point, if burned to same a collection of display device with group correction Value, it may appear that the final display gamma value curve of big quantity display apparatus does not meet 2.0 curves of gamma-gamma 2.4 of customer requirement The case where curve (Gamma2.0-Gamma2.4), (gamma value of usual display device was required 2.2 or so, and allows certain model The deviation enclosed, therefore the specification limit finally allowed is in 2.0-2.4).
As shown in Figure 1, the test sample gamma curve that Fig. 1, which is existing bearing calibration, to be obtained.Fig. 1 specifically shows therein Two test samples be corrected after gamma curve, respectively curve S1 and curve S2.Curve S1 and curve S2 are fallen Outside 2.4 curve area defined of gamma 2.0- gammas required by client.Specifically, curve S1 is fallen in gamma 2.0- gammas The lower section of 2.4 two curves of curve, curve S2 are fallen in 2.0 curves of gamma-gamma, 2.4 curve (with G2.0 and G2.4 tables in Fig. 1 Show) tops of two curves, therefore two test samples are all unsatisfactory for the specification requirement of client.As previously described, with a batch Display device it is burned with group corrected value the case where, the final display gamma curve of big quantity display apparatus can be caused not meet client and wanted It asks.
Further analysis typing finds chromaticity coordinates between different display devices with the color coordinate characteristics curve after group corrected value Difference is excessive.As shown in Fig. 2, grayscale-chromaticity coordinates relational graph (color coordinate characteristics curve) that Fig. 2, which is existing bearing calibration, to be obtained, There are larger differences between the corresponding x/y chromaticity coordinates values of curve S1 and curve S2.The x color coordinate characteristics curve curves of curve S1 X_S1 indicates that the y color coordinate characteristics curve of curve S1 is indicated with curve y_S1, the x color coordinate characteristics curve curves of curve S2 X_S2 indicates that the y color coordinate characteristics curve of curve S2 is indicated with curve y_S2.Fig. 2 shows curve x_S1 and curve x_S2 differences Very big, curve y_S1 and curve y_S2 differences are also very big.Fig. 2 shows that the display quality of different display devices is unstable.Namely It says, the color coordinate characteristics curve of different display devices has relatively large deviation, the feelings that curve intermediate projections obviously and under both sides are rolled over occurs Condition causes the display gamma value of most display devices beyond the specification required by client.
Fig. 3 is that the different product highest grayscale that existing bearing calibration obtains corresponds to chromaticity coordinates value.Specifically, Fig. 3 is further Show that the corresponding color of multiple and different products (display device) highest grayscale (white point grayscale) obtained using existing bearing calibration is sat Scale value.As seen from Figure 3, the highest grayscale of different display devices corresponds to that chromaticity coordinates value deviation is very big, and x/y chromaticity coordinates value differences are different It has been even up to 0.015.Fig. 3 shows the unstable situation of the display quality of different display devices more obviously.
The reason of the above situation occur is, when to all burned setting value with group of same a collection of display device, does not examine fully The display effect for considering different display devices is different, therefore corrects no specific aim, can not ensure that each display device reaches Specification required by client.
For this purpose, the present invention provides a kind of new bearing calibration, the bearing calibration can be according to each display device itself Display effect feature, pointedly each display device is corrected, to make each display device that can reach phase The specification requirement answered improves the display effect of each display device.
To make the above purposes, features and advantages of the invention more obvious and understandable, below in conjunction with the accompanying drawings to the present invention Specific embodiment be described in detail.
One embodiment of the invention provides a kind of bearing calibration of display device gray-scale intensity and coloration, incorporated by reference to reference to figure 4 To Fig. 6.
Referring to FIG. 4, Fig. 4 is each steps flow chart schematic diagram of bearing calibration provided in an embodiment of the present invention.
Specifically, step S11 is carried out, red picture, green picture, blue picture, white picture and black picture are obtained Tristimulus values (tristimulus values).
Tristimulus values is the expression for causing human body retina to the amount of the stimulation degree of three kinds of primary colors of red, green and blue.This reality It applies in example, the display device includes multiple pixels, and each pixel includes red sub-pixel, green sub-pixels and the sub- picture of blue Element.
Above-mentioned tristimulus values is obtained to specifically include：Display device red picture tristimulus values is obtained, with (XRed, YRed, ZRed) It indicates；Display device green picture tristimulus values is obtained, with (XGreen, YGreen, ZGreen) indicate；Display device blue is obtained to draw Face tristimulus values, with (XBlue, YBlue, ZBlue) indicate；Display device white picture tristimulus values is obtained, with (XWhite, YWhite, ZWhite) indicate；Display device black picture tristimulus values is obtained, with (XBlack, YBlack, ZBlack) indicate.
Specifically, the above-mentioned assorted picture tristimulus values of measuring system scanning record display device can be used.
Step S12 is carried out, the n-th grey menu tristimulus values and red picture, green picture, blue picture and black are established The relational expression of the tristimulus values of picture.
In the present embodiment, using (Xn, Yn, Zn) indicate that display device the n-th grey menu tristimulus values, n are 0 between M Random natural number, 0 be display device minimum (minimum) grayscale exponent number (in this specification, grayscale exponent number also abbreviation grayscale sometimes, It is not distinguish), M is highest (maximum) grayscale exponent number of display device, and M is the natural number more than 2.
According to CIE1931-xyY standard colorimetric systems, Y in the n-th grey menu tristimulus valuesnFor brightness (luminance) (i.e. YnIndicate response of the human eye to brightness).
Establishing above-mentioned relation formula can also be expressed as establishing (XRed, YRed, ZRed)、(XGreen, YGreen, ZGreen)、(XBlue, YBlue, ZBlue)、(XBlack, YBlack, ZBlack) and (Xn, Yn, Zn) between relational expression.
Specifically, the relational expression is as shown in following formula one：
(rn, gn, bn) be the n-th grayscale luminance factor group, rn、gnAnd bnRespectively red channel luminance coefficient, green channel are bright Spend coefficient and blue channel luminance factor.
By formula one (the i.e. described relational expression), the present embodiment makes (Xn, Yn, Zn) use (rn, gn, bn) pierced with other each three Sharp value is expressed, to which the tristimulus values under corresponding grayscale can be acquired using formula one, can also using formula one come Acquire corresponding (r under the conditions of each grayscalen, gn, bn), it can specifically refer to following step.
Step S13 is carried out, according to the relation reality penetrance formula.
In the present embodiment, include according to penetrance formula described in the relation reality：
Using the formula one, (r is obtainedn, gn, bn) expression formula, as shown in following formula two：
It should be noted that during establishing formula one and formula two, the present embodiment first uses in formula one Black picture tristimulus values (XBlack, YBlack, ZBlack) data, then again excluded in formula two, in order to disappear Except the light leakage under black picture state in display device influences.Such as when the display device is LCD display device, black Certain light leakage is had under picture state, uses the present embodiment formula one and formula two that can eliminate the light leakage of black picture at this time Influence to entire correction course, to improve correction accuracy.
After obtaining formula two, the penetrance of red channel is expressed as TRn, the penetrance of green channel is expressed as TGn, The penetrance of blue channel is expressed as TBn, then the penetrance formula can be obtained as shown in following formula three：
Wherein, (rWhite, gWhite, bWhite) by substituting into (X in the formula twoWhite, YWhite, ZWhite) obtain.
(XWhite, YWhite, ZWhite) be display device maximum gray tristimulus values, i.e. the tristimulus values of white picture.
Step S14 is carried out, the tristimulus values of multiple grey menus is sampled, it is public using sampling tristimulus values and the penetrance Formula obtains sampled voltage-penetrance data, carries out expansion calculating to the sampled voltage-penetrance data, obtains voltage-and penetrate Rate table.
Incorporated by reference to being step S14 includes in flow diagram shown in Fig. 4 step schematic diagram with reference to figure 4 and Fig. 5, Fig. 5.This In the method that embodiment provides, step S14 may further include step S141, step S142 and step S143.
Step S141 is carried out, K group gray scale voltages are applied to the display device, obtains the K groups three of corresponding K grey menu Values.
That is, in the present embodiment, the tristimulus values for sampling multiple grey menus includes：The display device is applied K group gray scale voltages obtain the K group tristimulus values of corresponding K grey menu.
Likewise, measuring system can be used to scan the tristimulus values for recording this K grey menu.
It should be noted that during K grey menu tristimulus values of above-mentioned sampling, this K grey menu is more disperseed Be conducive to the making of subsequent voltage-penetrance table.Therefore, K grey menu the more is disperseed the more good in whole grey menus, and And disperse more more uniform better.Meanwhile preferably sampling maximum gray (white picture corresponds to grayscale) and minimum gray (black picture Corresponding grayscale) tristimulus values.Due to just having obtained the tristimulus of the two grey menus in the present embodiment step S11 Value, therefore, when using them as the K grey menu tristimulus values is chosen, additionally it is possible to reduce sampling step, real process In, it is only necessary to the tristimulus values of K-2 grey menu of re-sampling.
When display device is when sharing 256 grayscale, the numberical range of above-mentioned K can be 10~20.In the present embodiment, choosing It selects K and is equal to 16, is i.e. the present embodiment samples the tristimulus values of 16 grey menus.
The present embodiment specifically, to select to enable this corresponding specific grayscale of 16 grey menus be 0,15,23,31,47,63, 95,127,160,192,208,224,232,240,248 and 255 (wherein 0 grayscale and 255 grayscale correspond to black picture ash respectively Rank and white picture grayscale, the present embodiment have obtained in step s 11).To obtain the tristimulus of this 16 grey menus Value, and also mutually should be given data to generate their 16 groups of gray scale voltages.
It should be noted that in other embodiments, display device can have other grayscale exponent numbers, such as have 1024 grayscale, At this point, correspondingly, the range of choice of K values can be suitably adjusted, that is, the grey menu quantity sampled can adjust.
Step S142 is carried out, according to the penetrance formula, K groups gray scale voltage and K group tristimulus values, obtains corresponding K K groups voltage-penetrance data of grey menu.
That is, in the present embodiment, obtains sampled voltage-using sampling tristimulus values and the penetrance formula and penetrate Rate data include：According to the penetrance formula, K groups gray scale voltage and K group tristimulus values, the K for corresponding to K grey menu is obtained Group voltage-penetrance data.
In above-mentioned K groups voltage-penetrance data, every group of voltage-penetrance data include that three voltage values and three wear Saturating rate value.Three voltage values are respectively used to three sub-pixels of control, and corresponding three penetration values are respectively then three sub- pictures The corresponding penetrance of element, i.e., the penetrance T of above-mentioned red channelRn, the penetrance T of green channelGn, the penetrance of blue channel TBn.Since K is equal to 16, the penetrance (T of 16 red channels is obtained in the above process togetherR0、TR15、TR23…… TR255), the penetrance (T of 16 green channelsG0、TG15、TG23……TG255) and 16 blue channels penetrance (TB0、 TB15、TB23……TB255)。
In method provided in this embodiment, step S142 may further include step S1421 and step S1422, such as Fig. 5 Shown in.
Step S1421 is carried out, the K groups tristimulus values is substituted into respectively in the formula two and the formula three, is obtained To K groups tristimulus values-penetrance data.
Step S1422 is carried out, according to the K groups tristimulus values-penetrance data and the K groups gray scale voltage and institute The one-to-one relationship for stating K group tristimulus values obtains the K groups voltage-penetrance data.
By step S1421 and step S1422 it is found that in the present embodiment, according to the penetrance formula, the K groups grayscale Voltage and the K groups tristimulus values, obtaining the K groups voltage-penetrance data includes：First, by the K groups tristimulus values point It does not substitute into the formula two and the formula three, obtains K groups tristimulus values-penetrance data；Then, according to the K groups The one-to-one relationship of tristimulus values-penetrance data and the K groups gray scale voltage and the K groups tristimulus values, obtains institute State K groups voltage-penetrance data.
Step S143 is carried out, expansion calculating is carried out to the voltage-penetrance data using interpolation method.
That is, in the present embodiment, expansion calculating is carried out to the K groups voltage-penetrance data, obtains the electricity Pressure-penetrance table includes：Expansion calculating is carried out to the voltage-penetrance data using interpolation method.
The interpolation method can be cubic spline interpolation, spline of quartic interpolation method or Fifth system method.
In the present embodiment, cubic spline interpolation is specifically used.Cubic spline interpolation is opposite to simplify, and can guarantee expansion Obtained each voltage-penetrance data afterwards meet precise requirements.
The calculation formula of the cubic spline interpolation is as shown in following formula four：
In the formula four, (Vk-1, Tk-1) and (Vk, Tk) it is the adjacent two pairs voltage-penetrance data, (V, T) is to fall In (Vk-1, Tk-1) and (Vk, Tk) between voltage-penetrance data, T TRn, TGnOr TBnAny one；
The minimum voltage of the voltage-penetrance data is VMin, maximum voltage VMax；According to the formula four, obtain Including K-1 sections of voltage-penetrance calculating formula, by V from VMinStart with (VMax-VMin)/m is that step value is gradually increased to VMax, The m V values being stepped up are obtained, the m V values are substituted into the calculating formula one by one, obtain m T value, whole V values and T values are Constitute the voltage-penetrance table.
In the present embodiment, as needed, m can be 500.In general, maximum voltage is VMaxBe 5V or so (certainly, according to not Difference is had with display device), and minimum voltage is VMinFor 0V.When m is 500, it is equivalent to made voltage-penetrance In table, being often separated by 0.01V just has a pair of of voltage-penetration value, after there is enough precision to be used for for voltage-penetrance table at this time The correction of continuous display device.In other embodiments, m can also take other numerical value.
In the formula four, hkCalculation formula as shown in following formula five：
hk=Vk-Vk-1
In the formula four, MkCalculation formula as shown in following formula six：
In the formula six, μkAnd λkCalculation formula as shown in following formula seven：
After completion of the above process, a large amount of voltages-penetrance data obtained usually indicate in a tabular form, as described Voltage-penetrance table.The voltage-penetrance table actually includes that red channel voltage-penetrance table, green channel voltage-are worn Saturating rate table and blue channel voltage-penetrance table.When m is equal to 500, there are 500 pairs of voltage-penetration values in each table.
In the present embodiment step S14, the method by sampling display device difference grey menu tristimulus values obtains multigroup Tristimulus values (when m is equal to 500, one shares 500 groups of tristimulus values), the tristimulus values obtained during this is all each display The characteristic of device itself.Subsequent voltage-penetrance table is built upon on the basis of these tristimulus values, therefore, acquired Voltage-penetrance table have significant specific aim, can be bearing calibration it is accurate correct provide safeguard.
Meanwhile in step S14, after multigroup tristimulus values substitution penetrance formula will be obtained, sampled voltage-penetrance is obtained Data obtain more data, to obtain voltage-penetrance table then in the way of expansion calculating.Aforementioned sample process With this expansion calculations incorporated timing is shortened from without being tested one by one each voltage-penetrance data Between, so that entire correction course is time-consuming shorter.
With continued reference to Fig. 4, carry out step S15, according to target gamma value, target colorimetric, the relational expression, white picture and The tristimulus values of black picture acquires the target penetration rate of set-point.
This step that is, according to target gamma value, target colorimetric, (XWhite, YWhite, ZWhite)、(XBlack, YBlack, ZBlack) With the relational expression, the target penetration rate of set-point is acquired.
Incorporated by reference to being step S15 includes in flow diagram shown in Fig. 4 step schematic diagram with reference to figure 4 and Fig. 6, Fig. 6, this Embodiment provide method in, step S15 may further include step S151, step S152, step S153, step S154, Step S155 and step S156.
First, it carries out step S151 and formula nine is established according to CIE1931-xyY standard colorimetric systems.Step S151 packets It includes：Indicate that the target colorimetric, x indicate that red component, y indicate green component using (x, y).(x, y) be it is known that because (x, Y) it is usually that client directly gives.In the case of known to red component and green component, due to red component, green component and Always it is equal to 1 after blue component, therefore, also corresponds to be aware of blue component.
According to CIE1931-xyY standard colorimetric systems, (x, y) and (Xn, Yn, Zn) meet as shown in following formula eight：
Adjustment is obtained as shown in following formula nine：
Carry out step S152, rWhite、gWhiteAnd bWhiteFormula two is substituted into respectively, acquires maximum brightness YMaxOptimal solution.
In the present embodiment, since display device is 256 grayscale, rWhite、gWhiteAnd bWhiteRespectively with it is theoretic Maximum brightness coefficient r255、g255And b255It is close, but be not completely equivalent again, this is because the property of each display device itself It determines.
Step S152 is specifically included：By rWhiteIt is substituted into jointly in the formula two with the formula nine, obtains YMax1、gMax1 And bMax1；By gWhiteIt is substituted into jointly in the formula two with the formula nine, obtains YMax2、rMax2And bMax2；By bWhiteWith it is described Formula nine is substituted into jointly in the formula two, obtains YMax3、rMax3And gMax3；It takes in above-mentioned three groups of solutions, the one group of solution met the requirements For maximum brightness optimal solution, the Y in the maximum brightness optimal solution is expressed as the corresponding highest goal brightness of maximum gray YMax。
During above-mentioned steps S152, three groups of solutions are respectively：First group, YMax1With (rWhite, gMax1, bMax1)；Second group, YMax2With (rMax2, gWhite, bMax2)；Third group, YMax3With (rMax3, gMax3, bWhite).In this three groups of solutions, at least one group of solution pair The luminance factor answered is to disclosure satisfy that accordingly to be less than or equal to (r respectivelyWhite, gWhite, bWhite).It is divided into three groups of situations at this time：When The corresponding luminance factor of three groups of solutions, which is satisfied by, is less than or equal to (rWhite, gWhite, bWhite) when, YMax1、YMax2And YMax3It is optional Highest goal brightness, select at this time in three maximum one as final highest goal brightness YMax；When there is two groups of solutions corresponding Luminance factor, which meets, is less than or equal to (rWhite, gWhite, bWhite) when, YMax1、YMax2And YMax3It is optional highest mesh to have two of which Brightness is marked, selects larger in the two one as final highest goal brightness Y at this timeMax；When only one group of solution is corresponding Luminance factor, which meets, is less than or equal to (rWhite, gWhite, bWhite) when, corresponding brightness (the i.e. Y of this group of luminance factorMax1、YMax2With YMax3One of) as final highest goal brightness YMax。
Carry out step S153, rBlack、gBlackAnd bBlackFormula two is substituted into respectively, acquires minimum brightness YMinOptimal solution.
Step S153 is specifically included：By rBlackIt is substituted into jointly in the formula two with the formula nine, obtains YMin1、gMin1 And bMin1；By gBlackIt is substituted into jointly in the formula two with the formula nine, obtains YMin2、rMin2And bMin2；By bBlackWith it is described Formula nine is substituted into jointly in the formula two, obtains YMin3、rMin3And gMin3；rBlack、gBlackAnd bBlackBy in the formula two Substitute into XBlack、YBlack、ZBlackIt obtains；It takes in above-mentioned three groups of solutions, the one group of solution met the requirements is minimum brightness optimal solution, described Y in minimum brightness optimal solution is expressed as Y as the corresponding minimum object brightness of minimum grayMin。
During above-mentioned steps S153, three groups of solutions are respectively：First group, YMin1With (rBlack, gMin1, bMin1)；Second group, YMin2With (rMin2, gBlack, bMin2)；Third group, YMin3With (rMin3, gMin3, bBlack).In this three groups of solutions, at least one group of solution pair The luminance factor answered is to disclosure satisfy that accordingly to be less than or equal to (r respectivelyBlack, gBlack, bBlack).It is divided into three groups of situations at this time：When The corresponding luminance factor of three groups of solutions, which is satisfied by, is less than or equal to (rBlack, gBlack, bBlack) when, YMin1、YMin2And YMin3It is optional Minimum object brightness selects minimum in three one as final minimum object brightness Y at this timeMin；When there is two groups of solutions corresponding Luminance factor, which meets, is less than or equal to (rBlack, gBlack, bBlack) when, YMin1、YMin2And YMin3It is optional minimum mesh to have two of which Brightness is marked, selects smaller in the two one as final minimum object brightness Y at this timeMin；When only one group of solution is corresponding Luminance factor, which meets, is less than or equal to (rBlack, gBlack, bBlack) when, corresponding brightness (the i.e. Y of this group of luminance factorMin1、YMin2With YMin3One of) as final minimum object brightness YMin。
Step S154 is carried out, by YnWith YMaxAnd YMinBetween equation acquire Yn。
YnWith YMaxAnd YMinBetween relationship as shown in following formula ten：
Gamma in formula ten is the target gamma value, and usual target gamma value is provided by customer requirement, and usually Selection is 2.2 or so, while target gamma value can have certain domain of walker, finally be usually chosen between 2.0 to 2.4. In the present embodiment, in order to make the Y acquirednIt is more accurate, it can directly select 2.2 as Gamma substitution formula ten.
In the above process, Y is acquiredMaxAnd YMin, the corresponding object brightnesses of corresponding grayscale exponent number n are acquired further according to formula ten Yn, this process is to re-start normalization process to the corresponding object brightness of each grayscale.This normalization process makes each The corresponding object brightness Y of grayscalenIt can be obtained by formula ten, and during this normalization, each object brightness YnAll According to the above-mentioned Y accurately calculatedMaxAnd YMinAnd obtain, therefore, make the corresponding object brightness Y of each grayscalenMore precisely.
Step S155 is carried out, Y is solved according to the formula tennAfterwards, by YnIt substitutes into the formula nine and solves XnAnd Zn。
Carry out step the S156, (X that will be solvedn, Yn, Zn) formula three is substituted into, obtain the target penetration rate.
The process of step S151 described above to step S155 is to acquire the target tristimulus values (X of set-pointn, Yn, Zn) Process, then the process of recycle step S156 obtain target penetration rate.
It should be noted that as shown in Figure 4, in the present embodiment, two steps of step S13 and step S14 and step S15 is parallel, does not have strict sequence between them, can respectively carry out, therefore, in other embodiments, they can To be carried out at the same time, step S15 can also be first carried out, then carry out step S13 and step S14, the same of step S15 can also carried out Shi Jinhang steps S13 and step S14.Likewise, it will be appreciated from fig. 6 that step S151 and the other three step --- step S152, walk Rapid S153 and step S154 --- it is parallel, step S152 and step S153 are parallel.
Step S16 is carried out, the corresponding target voltage of the target penetration rate is found in the voltage-penetrance table Value, or the corresponding target voltage values of the target penetration rate are calculated according to the voltage-penetrance meter.
In the present embodiment, when the target penetration rate is the value in the voltage-penetrance, by the voltage- The corresponding target voltage values of the target penetration rate are found in penetrance table；When the target penetration rate is fallen in the voltage- When between two known penetrances in penetrance table, the target penetration rate pair is calculated according to the voltage-penetrance meter The target voltage values answered.
When target voltage values corresponding according to the voltage-penetrance meter calculating target penetration rate, using straight line Interpolation calculation goes out the corresponding target voltage values of the target penetration rate.
The linear interpolation is as shown in following formula 11：
VK targetsAnd TK targetsThe target voltage and the target penetration rate, V are indicated respectivelyK targetsIt can be red channel targets electricity Pressure, green channel targets voltage or blue channel target voltage, corresponding, TK targetsCan be red channel targets penetrance, green channel mesh Mark penetrance or blue channel target penetration rate, T1And T2For described two known penetrances, V1For corresponding T1Voltage, V2For correspondence T2Voltage.
According to above-mentioned formula 11, you can in the hope of target voltage VK targets。
Step S17 is carried out, according to the target voltage values VK targets, the target register value of the set-point is set.
In the present embodiment, target register value can be deposited in the register of display device, to make the ash of display device Rank brightness and coloration reach specification needed for client.And then the luminance transition of every display device and color representation is made to reach more Good effect.The quantity of set-point is according to display device different and different.Such as to certain display devices, from minimum gray scale to most High gray can have 30 set-points or the set-point of other quantity.After being all configured to whole set-points, carry out The correction to display device is completed in burning.
In the bearing calibration of display device gray-scale intensity and coloration that the present embodiment is provided, pass through step S11, step S12, step S13 and step S14 obtain voltage-penetrance table of display device, pass through step S11, step S12 and step S15 obtains target penetration rate.Then target voltage values are obtained (i.e. according to target penetration rate and the electricity by step S16 Pressure-penetrance table obtains target voltage values), the final correction for carrying out step S17 completions to display device.In whole process, by In the voltage obtained-penetrance table be each own voltage-penetrance of each display device, therefore, the bearing calibration Have the advantages that with strong points and correction result is accurate.Also, the step S14 used during obtaining voltage-penetrance table Sampling and the mode expanded has been used to carry out, therefore, the bearing calibration can be quickly obtained corresponding voltage-penetrance table, And then rapidly the grayscale of display device excessively can be corrected with coloration adjustment to required preset value.Finally, the correction side Method ensures that display device grayscale is excessively improved with the accuracy that shows of coloration and homogeneity, to improve the display of display device Quality, and save corresponding adjustment time.
In the present embodiment, on the one hand, be directed to a display device, dispaly state when dispatching from the factory to it establishes electricity after sampling Pressure-penetrance table, therefore, the precision adjusted in the present embodiment is higher；On the other hand, it is extended acquisition electricity using interpolation method Therefore pressure-penetrance table takes shorter.
This implementation compared with prior art, without building library lookup, saves the searching typical sample (Golden before going into operation Sample it) builds the time in library, accelerates raw field flow journey and producing line beat, so as to substantially shorten the time of three gamma corrections.And And targetedly adjustment correction is carried out to each display device in process of production due to that can use, to ensure production All device brightness and coloration performance are preferable, and the display quality of display device is excellent.
By testing multiple specific products, when the bearing calibration using the above embodiment of the present invention is to display device When being corrected, not only corrects result and meet customer requirement, moreover, when being corrected to a display device, taking can contract It is as short as within 10 seconds.
Specific correction test result is referring to FIG. 7, the test sample gal that Fig. 7, which is bearing calibration of the embodiment of the present invention, to be obtained Horse curve specifically after Fig. 7 shows that the bearing calibration using the above embodiment of the present invention is corrected display device, obtains The test sample gamma curve arrived.Fig. 7 specifically shows the gamma curve after two test samples therein are corrected, respectively For curve S3 and curve S4.Curve S3 and curve S4 falls 2.0 curves of gamma-gamma, the 2.4 curve (figure required by client Indicated with G2.0 and G2.4 in 7) in area defined, specifically, curve S3 and curve S4 are overlapped in the figure 7.Also It is to say, the two test samples all meet the specification requirement of client, and the display performance consistency of two test samples is high.By It is corrected one by one for the characteristic of each display device itself in the bearing calibration of the present embodiment so that with a batch display device Burned different calibration settings respectively, to make the final display gamma curve of each display device meet the requirements of the customers.
Fig. 7 and Fig. 1 is compared, and can intuitively be obtained, compared to existing bearing calibration, the bearing calibration school of the embodiment of the present invention Positive result is more preferable.
Further analysis typing finds chromaticity coordinates between different display devices with the color coordinate characteristics curve after group corrected value Difference very little.As shown in figure 8, between the corresponding x/y chromaticity coordinates values of curve S3 and curve S4, there are smaller differences.The x of curve S3 Color coordinate characteristics curve indicates that the y color coordinate characteristics curve of curve S3 is indicated with curve y_S3, the x of curve S4 with curve x_S3 Color coordinate characteristics curve indicates that the y color coordinate characteristics curve of curve S4 is indicated with curve y_S4 with curve x_S4.Fig. 8 displays are bent Line x_S3 and curve x_S4 difference very littles, much partly essentially coincide；Curve y_S3 and curve y_S4 differences also very little, many portions Divide and essentially coincides.Demonstrate again that the display quality of different display devices is stablized.That is, the chromaticity coordinates of different display devices is special The display gamma value of linearity curve deviation very little, each display device meets the specification required by client.
It is grayscale-chromaticity coordinates relational graph that bearing calibration of the embodiment of the present invention obtains with continued reference to Fig. 8, Fig. 8.Fig. 8 and Fig. 2 Comparison, can more can be visually seen, after bearing calibration through the embodiment of the present invention is corrected, the display quality of display device Stability improves.Specifically, curve x_S3 and curve x_S4 are mostly in overlap condition in fig. 8, and only small part has micro- Small separation；Similarly, curve y_S3 and curve y_S4 are mostly in overlap condition in fig. 8, and only small part has small Separation.
Further, Fig. 9 is that the different product highest grayscale that bearing calibration of the embodiment of the present invention obtains corresponds to chromaticity coordinates value. Fig. 9 shows further multiple and different products (display device) highest obtained using the bearing calibration of the above embodiment of the present invention The corresponding chromaticity coordinates value of grayscale (white point grayscale).It will be seen from figure 9 that correspond to chromaticity coordinates value inclined for the highest grayscale of different display devices Poor very little, x/y chromaticity coordinates value differences are different substantially within 0.002.Fig. 9 shows the display product of different display devices more obviously Matter is stablized.
Fig. 9 and Fig. 3 are compared, and can more can be visually seen, and after bearing calibration through the embodiment of the present invention is corrected, are shown The display quality stability of showing device improves.It should be noted that in Fig. 9 and Fig. 3, sample point number is identical, i.e., both for The result that equal number of product is tested.In fig.9, all sample points all concentrate on a smaller region； And in figure 3, the region of all sample point distributions is larger.
Another embodiment of the present invention provides the bearing calibration of another display device gray-scale intensity and coloration, incorporated by reference to reference Figure 10 to Figure 12.Figure 10 is each steps flow chart schematic diagram of bearing calibration that another embodiment of the present invention provides, and Figure 11 is Figure 10 institutes Show that the step schematic diagram that step S24 includes in flow diagram, Figure 12 are that step S25 includes in flow diagram shown in Figure 10 Step schematic diagram.
Referring to FIG. 10, carrying out step S21, three thorns of red picture, green picture, blue picture and white picture are obtained Swash value.
Above-mentioned tristimulus values is obtained to specifically include：Display device red picture tristimulus values is obtained, with (XRed, YRed, ZRed) It indicates；Display device green picture tristimulus values is obtained, with (XGreen, YGreen, ZGreen) indicate；Display device blue is obtained to draw Face tristimulus values, with (XBlue, YBlue, ZBlue) indicate；Display device white picture tristimulus values is obtained, with (XWhite, YWhite, ZWhite) indicate；Display device black picture tristimulus values is obtained, with (XBlack, YBlack, ZBlack) indicate.
Specifically, the above-mentioned assorted picture tristimulus values of measuring system scanning record display device can be used.
In the present embodiment, there is no black picture tristimulus values is obtained, at this point, being particularly suitable for not having under black picture state The display device of light leakage, therefore, in the present embodiment, the display device is selected as OLED display, works as OLED display Using the present embodiment bearing calibration when, better calibration result can be reached.
It should be noted that when not having to obtain black picture tristimulus values, the bearing calibration of the present embodiment can also answer For other display devices, such as when light leakage state is smaller to the correct influences of display device, the bearing calibration of the present embodiment It is readily applicable to LCD display device.
Step S22 is carried out, the three of the n-th grey menu tristimulus values and red picture, green picture and blue picture are established The relational expression of values.
In the present embodiment, using (Xn, Yn, Zn) indicate that display device the n-th grey menu tristimulus values, n are 0 between M Random natural number, 0 is minimum (minimum) the grayscale exponent number of display device, and M is highest (maximum) grayscale exponent number of display device, M For the natural number more than 2.
According to CIE1931-xyY standard colorimetric systems, Y in the n-th grey menu tristimulus valuesnFor brightness.
Establishing above-mentioned relation formula can also be expressed as establishing (XRed, YRed, ZRed)、(XGreen, YGreen, ZGreen)、(XBlue, YBlue, ZBlue) and (Xn, Yn, Zn) between relational expression.
Specifically, the relational expression is as shown in following equation 1：
(rn, gn, bn) be the n-th grayscale luminance factor group, rn、gnAnd bnRespectively red channel luminance coefficient, green channel are bright Spend coefficient and blue channel luminance factor.
By formula 1 (the i.e. described relational expression), the present embodiment makes (Xn, Yn, Zn) use (rn, gn, bn) pierced with other each three Sharp value is expressed, and to acquire the tristimulus values under corresponding grayscale using formula 1, can also be asked using formula 1 Corresponding (r under the conditions of each grayscalen, gn, bn), it can specifically refer to following step.
Step S23 is carried out, according to the relation reality penetrance formula.
In the present embodiment, include according to penetrance formula described in the relation reality：
Using the formula 1, (r is obtainedn, gn, bn) expression formula, as shown in equation 2 helow：
Then, the penetrance of red channel is expressed as TRn, the penetrance of green channel is expressed as TGn, blue channel wears Saturating rate is expressed as TBn, then the penetrance formula can be obtained as shown in following equation 3：
Wherein, (rWhite, gWhite, bWhite) by substituting into (X in the formula 2White, YWhite, ZWhite) obtain.
(XWhite, YWhite, ZWhite) be display device maximum gray tristimulus values, i.e. the tristimulus values of white picture.
Step S24 is carried out, the tristimulus values of multiple grey menus is sampled, it is public using sampling tristimulus values and the penetrance Formula obtains sampled voltage-penetrance data, carries out expansion calculating to the sampled voltage-penetrance data, obtains voltage-and penetrate Rate table.
Incorporated by reference to reference to figure 10 and Figure 11, in method provided in this embodiment, step S24 may further include step S241, step S242 and step S243.
Step S241 is carried out, K group gray scale voltages are applied to the display device, obtains the K groups three of corresponding K grey menu Values.
That is, in the present embodiment, the tristimulus values for sampling multiple grey menus includes：The display device is applied K group gray scale voltages obtain the K group tristimulus values of corresponding K grey menu.
Likewise, measuring system can be used to scan the tristimulus values for recording this K grey menu.
It should be noted that during K grey menu tristimulus values of above-mentioned sampling, this K grey menu is more disperseed Be conducive to the making of subsequent voltage-penetrance table.Therefore, K grey menu the more is disperseed the more good in whole grey menus, and And disperse more more uniform better.Meanwhile preferably sampling maximum gray (white picture corresponds to grayscale) and minimum gray (black picture Corresponding grayscale) tristimulus values.Due to just having obtained the tristimulus values of white picture grayscale in the present embodiment step S21, When therefore, using them as the K grey menu tristimulus values is chosen, additionally it is possible to reduce sampling step, in real process, Need the tristimulus values of K-1 grey menu of re-sampling.
When display device is when sharing 256 grayscale, the numberical range of above-mentioned K can be 10~20.In the present embodiment, choosing It selects K and is equal to 16.
It should be noted that in other embodiments, display device can have other gray numbers, such as have 1024 grayscale, this When, correspondingly, K values can be suitably adjusted.
I.e. the present embodiment samples the tristimulus values of 16 grey menus.The present embodiment is specifically, selection enables this 16 grayscale The corresponding specific grayscale of picture is 0,15,23,31,47,63,95,127,160,192,208,224,232,240,248 and 255 (wherein 255 grayscale white picture grayscale, the present embodiment have obtained in the step s 21).To obtain this 16 grey menus Tristimulus values, and for generate their 16 groups of gray scale voltages also mutually should be given data.
Step S242 is carried out, according to the penetrance formula, K groups gray scale voltage and K group tristimulus values, obtains corresponding K K groups voltage-penetrance data of grey menu.
That is, in the present embodiment, obtains sampled voltage-using sampling tristimulus values and the penetrance formula and penetrate Rate data include：According to the penetrance formula, K groups gray scale voltage and K group tristimulus values, the K for corresponding to K grey menu is obtained Group voltage-penetrance data.
In above-mentioned K groups voltage-penetrance data, every group of voltage-penetrance data include that three voltage values and three wear Saturating rate value.Three voltage values are respectively used to three sub-pixels of control, and corresponding three penetration values are respectively then three sub- pictures The corresponding penetrance of element, i.e., the penetrance T of above-mentioned red channelRn, the penetrance T of green channelGn, the penetrance of blue channel TBn.Since K is equal to 16, the penetrance (T of 16 red channels is obtained in the above process togetherR0、TR15、TR23…… TR255), the penetrance (T of 16 green channelsG0、TG15、TG23……TG255) and 16 blue channels penetrance (TB0、 TB15、TB23……TB255)。
In method provided in this embodiment, step S242 may further include step S2421 and step S2422, such as scheme Shown in 11.
Step S2421 is carried out, the K groups tristimulus values is substituted into respectively in the formula 2 and the formula 3, K is obtained Group tristimulus values-penetrance data.
Step S2422 is carried out, according to the K groups tristimulus values-penetrance data and the K groups gray scale voltage and institute The one-to-one relationship for stating K group tristimulus values obtains the K groups voltage-penetrance data.
By step S2421 and step S2422 it is found that in the present embodiment, according to the penetrance formula, the K groups grayscale Voltage and the K groups tristimulus values, obtaining the K groups voltage-penetrance data includes：First, by the K groups tristimulus values point It does not substitute into the formula 2 and the formula 3, obtains K groups tristimulus values-penetrance data；Then, according to the K groups three The one-to-one relationship of values-penetrance data and the K groups gray scale voltage and the K groups tristimulus values obtains described K groups voltage-penetrance data.
Step S243 is carried out, expansion calculating is carried out to the voltage-penetrance data using interpolation method.
That is, in the present embodiment, expansion calculating is carried out to the K groups voltage-penetrance data, obtains the electricity Pressure-penetrance table includes：Expansion calculating is carried out to the voltage-penetrance data using interpolation method.
The interpolation method can be cubic spline interpolation, spline of quartic interpolation method or Fifth system method.
In the present embodiment, cubic spline interpolation is specifically used.Cubic spline interpolation is opposite to simplify, and can guarantee expansion Obtained each voltage-penetrance data afterwards meet precise requirements.
The calculation formula of the cubic spline interpolation is as shown in following equation 4：
In the formula 4, (Vk-1, Tk-1) and (Vk, Tk) it is the adjacent two pairs voltage-penetrance data, (V, T) is to fall In (Vk-1, Tk-1) and (Vk, Tk) between voltage-penetrance data, T TRn, TGnOr TBnAny one；
The minimum voltage of the voltage-penetrance data is VMin, maximum voltage VMax；According to the formula 4, wrapped Containing K-1 sections of voltage-penetrance calculating formula, by V from VMinStart with (VMax-VMin)/m is that step value is gradually increased to VMax, obtain The V values being stepped up to m, substitute into the calculating formula by the m V values, obtain m T value, whole V values and T values, that is, structure one by one At the voltage-penetrance table.
In the present embodiment, as needed, m can be 500.In other embodiments, m can also take other numerical value.
In the formula 4, hkCalculation formula as shown in following equation 5：
hk=Vk-Vk-1
In the formula 4, MkCalculation formula as shown in following equation 6：
In the formula 6, μkAnd λkCalculation formula as shown in following equation 7：
After completion of the above process, a large amount of voltages-penetrance data obtained usually indicate in a tabular form, as described Voltage-penetrance table.The voltage-penetrance table actually includes including red channel voltage-penetrance table, green channel electricity Pressure-penetrance table and blue channel voltage-penetrance table.When m is equal to 500, there are 500 pairs of voltage-penetrances in each table Value.
In the present embodiment step S24, the method by sampling display device difference grey menu tristimulus values obtains multigroup Tristimulus values (when m is equal to 500, one shares 500 groups of tristimulus values), the tristimulus values obtained during this is all each display The characteristic of device itself.Subsequent voltage-penetrance table is built upon on the basis of these tristimulus values, therefore, acquired Voltage-penetrance table have significant specific aim, can be bearing calibration it is accurate correct provide safeguard.Meanwhile step S24 In, after multigroup tristimulus values substitution penetrance formula will be obtained, sampled voltage-penetrance data are obtained, then utilize expansion meter The mode of calculation obtains more data, to obtain voltage-penetrance table.Aforementioned sample process and this expansion calculations incorporated, From without being tested one by one each voltage-penetrance data, correction time is shortened, so that entirely correcting Journey takes shorter.
0 is continued to refer to figure 1, step S25 is carried out, according to target gamma value, target colorimetric, the relational expression and white picture Tristimulus values, acquire the target penetration rate of set-point.
This step that is, according to target gamma value, target colorimetric, (XWhite, YWhite, ZWhite) and the relational expression, it acquires The target penetration rate of set-point.
Incorporated by reference to reference to figure 10 and Figure 12, in method provided in this embodiment, step S25 may further include step S251, step S252, step S253, step S254, step S255 and step S256.
First, it carries out step S251 and formula 9 is established according to CIE1931-xyY standard colorimetric systems.Step S251 packets It includes：Indicate that the target colorimetric, x indicate that red component, y indicate green component using (x, y).(x, y) be it is known that because (x, Y) it is usually that client directly gives.In the case of known to red component and green component, due to red component, green component and Always it is equal to 1 after blue component, therefore, also corresponds to be aware of blue component.
According to CIE1931-xyY standard colorimetric systems, (x, y) and (Xn, Yn, Zn) meet as shown in following equation 8：
Adjustment is obtained as shown in following equation 9：
Carry out step S252, rWhite、gWhiteAnd bWhiteFormula 2 is substituted into respectively, acquires maximum brightness YMaxOptimal solution.
In the present embodiment, since display device is 256 grayscale, rWhite、gWhiteAnd bWhiteRespectively with it is theoretic Maximum brightness coefficient r255、g255And b255It is close, but be not completely equivalent again, this is because the property of each display device itself It determines.
Step S252 is specifically included：By rWhiteIt is substituted into jointly in the formula 2 with the formula 9, obtains YMax1、gMax1With bMax1；By gWhiteIt is substituted into jointly in the formula 2 with the formula 9, obtains YMax2、rMax2And bMax2；By bWhiteWith the formula 9 substitute into jointly in the formula 2, obtain YMax3、rMax3And gMax3；It takes in above-mentioned three groups of solutions, the one group of solution met the requirements is highest Brightness optimal solution, the Y in the maximum brightness optimal solution are expressed as Y as the corresponding highest goal brightness of maximum grayMax。
During above-mentioned steps S252, three groups of solutions are respectively：First group, YMax1With (rWhite, gMax1, bMax1)；Second group, YMax2With (rMax2, gWhite, bMax2)；Third group, YMax3With (rMax3, gMax3, bWhite).In this three groups of solutions, at least one group of solution pair The luminance factor answered is to disclosure satisfy that accordingly to be less than or equal to (r respectivelyWhite, gWhite, bWhite).It is divided into three groups of situations at this time：When The corresponding luminance factor of three groups of solutions, which is satisfied by, is less than or equal to (rWhite, gWhite, bWhite) when, YMax1、YMax2And YMax3It is optional Highest goal brightness, select at this time in three maximum one as final highest goal brightness YMax；When there is two groups of solutions corresponding Luminance factor, which meets, is less than or equal to (rWhite, gWhite, bWhite) when, YMax1、YMax2And YMax3It is optional highest mesh to have two of which Brightness is marked, selects larger in the two one as final highest goal brightness Y at this timeMax；When only one group of solution is corresponding Luminance factor, which meets, is less than or equal to (rWhite, gWhite, bWhite) when, corresponding brightness (the i.e. Y of this group of luminance factorMax1、YMax2With YMax3One of) as final highest goal brightness YMax。
Step S253 is carried out, by YnWith YMaxBetween equation acquire Yn。
YnWith YMaxBetween relationship as shown in following equation 10：
Gamma in formula 10 is the target gamma value.In the present embodiment, formula can be substituted into as Gamma by 2.2 10。
In the above process, Y is acquiredMax, the corresponding object brightness Y of corresponding grayscale exponent number n are acquired further according to formula 10n, this A process is to re-start normalization process to the corresponding object brightness of each grayscale.This normalization process makes each grayscale pair The object brightness Y answerednIt can be obtained by formula ten, and during this normalization, each object brightness YnAll according to upper State the Y accurately calculatedMaxAnd obtain, therefore, make the corresponding object brightness Y of each grayscalenMore precisely.
Step S254 is carried out, Y is solved according to the formula 10nAfterwards, by YnIt substitutes into the formula 9 and solves XnAnd Zn。
Carry out step the S255, (X that will be solvedn, Yn, Zn) formula 3 is substituted into, obtain the target penetration rate.
The process of step S251 described above to step S254 is to acquire the target tristimulus values (X of set-pointn, Yn, Zn), Then the process of recycle step S255 obtains target penetration rate.
It should be noted that as shown in Figure 10, in the present embodiment, two steps of step S23 and step S24 and step S25 is parallel, does not have strict sequence between them, can respectively carry out, therefore, in other embodiments, they can To be carried out at the same time, step S25 can also be first carried out, then carry out step S23 and step S24, the same of step S25 can also carried out Shi Jinhang steps S23 and step S24.Likewise, as shown in Figure 12, step S251 and other two step --- step S252 and Step S253 --- it is parallel.
Step S26 is carried out, the corresponding target voltage of the target penetration rate is found in the voltage-penetrance table Value, or the corresponding target voltage values of the target penetration rate are calculated according to the voltage-penetrance meter.
In the present embodiment, when the target penetration rate is the value in the voltage-penetrance, by the voltage- The corresponding target voltage values of the target penetration rate are found in penetrance table；When the target penetration rate is fallen in the voltage- When between two known penetrances in penetrance table, the target penetration rate pair is calculated according to the voltage-penetrance meter The target voltage values answered.
When target voltage values corresponding according to the voltage-penetrance meter calculating target penetration rate, using straight line Interpolation calculation goes out the corresponding target voltage values of the target penetration rate.
The linear interpolation is as shown in following equation 11：
VK targetsAnd TK targetsThe target voltage and the target penetration rate, V are indicated respectivelyK targetsIt can be red channel targets electricity Pressure, green channel targets voltage or blue channel target voltage, corresponding, TK targetsCan be red channel targets penetrance, green channel mesh Mark penetrance or blue channel target penetration rate, T1And T2For described two known penetrances, V1For corresponding T1Voltage, V2For correspondence T2Voltage.
According to above-mentioned formula 11, you can in the hope of target voltage VK targets。
Step S27 is carried out, according to the target voltage values VK targets, the target register value of the set-point is set.
In the present embodiment, target register value can be deposited in the register of display device, to make the ash of display device Rank brightness and coloration reach specification needed for client.And then the luminance transition of every display device and color representation is made to reach more Good effect.The quantity of set-point is according to display device different and different.Such as to certain display devices, from minimum gray scale to most High gray can have 30 set-points or the set-point of other quantity.After being all configured to whole set-points, carry out The correction to display device is completed in burning.
In the bearing calibration of display device gray-scale intensity and coloration that the present embodiment is provided, pass through step S21, step S22, step S23 and step S24 obtain voltage-penetrance table of display device, pass through step S21, step S22 and step S25 obtains target penetration rate.Then target voltage values are obtained (i.e. according to target penetration rate and the electricity by step S26 Pressure-penetrance table obtains target voltage values), the final correction for carrying out step S27 completions to display device.In whole process, by In the voltage obtained-penetrance table be each own voltage-penetrance of each display device, therefore, the bearing calibration Have the advantages that with strong points and correction result is accurate.Also, the step S24 used during obtaining voltage-penetrance table Sampling and the mode expanded has been used to carry out, therefore, the bearing calibration can be quickly obtained corresponding voltage-penetrance table, And then rapidly the grayscale of display device excessively can be corrected with coloration adjustment to required preset value.Finally, the correction side Method ensures that display device grayscale is excessively improved with the accuracy that shows of coloration and homogeneity, to improve the display of display device Quality, and save corresponding adjustment time.
In the present embodiment, on the one hand, for each different display device, dispaly state when dispatching from the factory to it samples After establish voltage-penetrance table, therefore, the precision adjusted in the present embodiment is higher；On the other hand, it is extended using interpolation method Voltage-penetrance table is obtained, therefore, is taken shorter.
This implementation compared with prior art, without building library lookup, save the searching typical sample before going into operation build library when Between, accelerate raw field flow journey and producing line beat, so as to substantially shorten the time of three gamma corrections.And due to that can be used in Targetedly adjustment is carried out in production process to each display device to correct, to ensure all device brightness and the color of production Degree performance is preferable, and the display quality of display device is excellent.
Although present disclosure is as above, present invention is not limited to this.Any those skilled in the art are not departing from this It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute Subject to the range of restriction.

Claims (15)

1. a kind of bearing calibration of display device gray-scale intensity and coloration, which is characterized in that including：
Display device red picture tristimulus values is obtained, with (XRed, YRed, ZRed) indicate；
Display device green picture tristimulus values is obtained, with (XGreen, YGreen, ZGreen) indicate；
Display device blue picture tristimulus values is obtained, with (XBlue, YBlue, ZBlue) indicate；
Display device white picture tristimulus values is obtained, with (XWhite, YWhite, ZWhite) indicate；
Display device black picture tristimulus values is obtained, with (XBlack, YBlack, ZBlack) indicate；
Using (Xn, Yn, Zn) indicating display device the n-th grey menu tristimulus values, for 0 to the random natural number between M, M is n The highest grayscale exponent number of display device, M are the natural number more than 2；
According to CIE1931-xyY standard colorimetric systems, Y in the n-th grey menu tristimulus valuesnFor brightness；
Establish (XRed, YRed, ZRed)、(XGreen, YGreen, ZGreen)、(XBlue, YBlue, ZBlue)、(XBlack, YBlack, ZBlack) and (Xn, Yn, Zn) between relational expression；
According to the relation reality penetrance formula；
The tristimulus values for sampling multiple grey menus obtains sampled voltage-using sampling tristimulus values and the penetrance formula Penetrance data carry out expansion calculating to the sampled voltage-penetrance data, obtain voltage-penetrance table；
According to target gamma value, target colorimetric, (XWhite, YWhite, ZWhite)、(XBlack, YBlack, ZBlack) and the relational expression, Acquire the target penetration rate of set-point；
The corresponding target voltage values of the target penetration rate are found in the voltage-penetrance table, or according to the electricity Pressure-penetrance meter calculates the corresponding target voltage values of the target penetration rate；
According to the target voltage values, the target register value of the set-point is set；
The relational expression is as shown in following formula one：
(rn, gn, bn) be the n-th grayscale luminance factor group, rn、gnAnd bnRespectively red channel luminance coefficient, green channel luminance system Number and blue channel luminance factor；
Include according to penetrance formula described in the relation reality：
Using the formula one, (r is obtainedn, gn, bn) expression formula, as shown in following formula two：
The penetrance of red channel is expressed as TRn, the penetrance of green channel is expressed as TGn, the penetrance of blue channel is expressed as TBn, the penetrance formula is obtained as shown in following formula three：
(rWhite, gWhite, bWhite) by substituting into (X in the formula twoWhite, YWhite, ZWhite) obtain.
2. the bearing calibration of display device gray-scale intensity and coloration as described in claim 1, which is characterized in that sample multiple ashes The tristimulus values of rank picture includes：K group gray scale voltages are applied to the display device, obtain the K groups three of corresponding K grey menu Values；Obtaining sampled voltage-penetrance data using sampling tristimulus values and the penetrance formula includes：It is worn according to described Saturating rate formula, K groups gray scale voltage and K group tristimulus values, obtain the K groups voltage-penetrance data for corresponding to K grey menu.
3. the bearing calibration of display device gray-scale intensity and coloration as claimed in claim 2, which is characterized in that worn according to described Saturating rate formula, the K groups gray scale voltage and the K groups tristimulus values, obtaining the K groups voltage-penetrance data includes：
The K groups tristimulus values is substituted into respectively in the formula two and the formula three, K groups tristimulus values-is obtained and penetrates Rate data；
One by one according to the K groups tristimulus values-penetrance data and the K groups gray scale voltage and the K groups tristimulus values Correspondence obtains the K groups voltage-penetrance data.
4. the bearing calibration of display device gray-scale intensity and coloration as claimed in claim 3, which is characterized in that the number of the K Value ranging from 10~20.
5. the bearing calibration of display device gray-scale intensity and coloration as claimed in claim 4, which is characterized in that the K groups Voltage-penetrance data carry out expansion calculating, obtain the voltage-penetrance table and include：Using interpolation method to K groups electricity Pressure-penetrance data carry out expansion calculating.
6. the bearing calibration of display device gray-scale intensity and coloration as claimed in claim 5, which is characterized in that the interpolation method For cubic spline interpolation, spline of quartic interpolation method or Fifth system method；
Wherein, the calculation formula of the cubic spline interpolation is as shown in following formula four：
In the formula four, (Vk-1, Tk-1) and (Vk, Tk) it is the adjacent two pairs voltage-penetrance data, (V, T) is to fall (Vk-1, Tk-1) and (Vk, Tk) between voltage-penetrance data, T TRn, TGnOr TBnAny one；
The minimum voltage of the voltage-penetrance data is VMin, maximum voltage VMax；According to the formula four, including K-1 sections of voltage-penetrance calculating formula, by V from VMinStart with (VMax-VMin)/m is that step value is gradually increased to VMax, obtain m The m V values are substituted into the calculating formula by a V values being stepped up one by one, obtain m T value, and whole V values and T values are constituted The voltage-penetrance table；
In the formula four, hkCalculation formula as shown in following formula five：
hk=Vk-Vk-1
In the formula four, MkCalculation formula as shown in following formula six：
In the formula six, μkAnd λkCalculation formula as shown in following formula seven：
7. the bearing calibration of display device gray-scale intensity and coloration as claimed in claim 6, which is characterized in that according to the mesh Mark gamma value, target colorimetric, (XWhite, YWhite, ZWhite)、(XBlack, YBlack, ZBlack) and the relational expression, acquire described set The target penetration rate a little is set, including：
The target colorimetric is indicated using (x, y), (x, y) is known；
According to CIE1931-xyY standard colorimetric systems, (x, y) and (Xn, Yn, Zn) meet as shown in following formula eight：
Adjustment is obtained as shown in following formula nine：
By rWhiteIt is substituted into jointly in the formula two with the formula nine, obtains YMax1、gMax1And bMax1；
By gWhiteIt is substituted into jointly in the formula two with the formula nine, obtains YMax2、rMax2And bMax2；
By bWhiteIt is substituted into jointly in the formula two with the formula nine, obtains YMax3、rMax3And gMax3；
It takes in above-mentioned three groups of solutions, the one group of solution met the requirements is maximum brightness optimal solution, and the Y in the maximum brightness optimal solution makees For the corresponding highest goal brightness of maximum gray, it is expressed as YMax；
By rBlackIt is substituted into jointly in the formula two with the formula nine, obtains YMin1、gMin1And bMin1；
By gBlackIt is substituted into jointly in the formula two with the formula nine, obtains YMin2、rMin2And bMin2；
By bBlackIt is substituted into jointly in the formula two with the formula nine, obtains YMin3、rMin3And gMin3；
rBlack、gBlackAnd bBlackBy substituting into X in the formula twoBlack、YBlack、ZBlackIt obtains；
It takes in above-mentioned three groups of solutions, the one group of solution met the requirements is minimum brightness optimal solution, and the Y in the minimum brightness optimal solution makees For the corresponding minimum object brightness of minimum gray, it is expressed as YMin；
YnWith YMaxAnd YMinBetween relationship as shown in following formula ten：
Wherein, Gamma is the target gamma value；
Y is solved according to the formula tennAfterwards, by YnIt substitutes into the formula nine and solves XnAnd Zn；
(the X that will be solvedn, Yn, Zn) formula three is substituted into, obtain the target penetration rate.
8. the bearing calibration of display device gray-scale intensity and coloration as claimed in claim 7, which is characterized in that when the target When penetrance is the value in the voltage-penetrance table, by finding the target penetration in the voltage-penetrance table The corresponding target voltage values of rate；When the target penetration rate fall two known penetrances in the voltage-penetrance table it Between when, the corresponding target voltage values of the target penetration rate are calculated according to the voltage-penetrance meter；
When target voltage values corresponding according to the voltage-penetrance meter calculating target penetration rate, using linear interpolation Method calculates the corresponding target voltage values of the target penetration rate；
The linear interpolation is as shown in following formula 11：
VK targetsAnd TK targetsThe target voltage and the target penetration rate, V are indicated respectivelyK targetsCan be red channel targets voltage, green Channel targets voltage or blue channel target voltage, corresponding, TK targetsIt can be penetrated for red channel targets penetrance, green channel targets Rate or blue channel target penetration rate, T1And T2For described two known penetrances, V1For corresponding T1Voltage, V2For corresponding T2Electricity Pressure.
9. a kind of bearing calibration of display device gray-scale intensity and coloration, which is characterized in that including：
Display device red picture tristimulus values is obtained, with (XRed, YRed, ZRed) indicate；
Display device green picture tristimulus values is obtained, with (XGreen, YGreen, ZGreen) indicate；
Display device blue picture tristimulus values is obtained, with (XBlue, YBlue, ZBlue) indicate；
Display device white picture tristimulus values is obtained, with (XWhite, YWhite, ZWhite) indicate；
Using (Xn, Yn, Zn) indicating display device the n-th grey menu tristimulus values, for 0 to the random natural number between M, M is n The highest grayscale exponent number of display device, M are the natural number more than 2；
According to CIE1931-xyY standard colorimetric systems, Y in the n-th grey menu tristimulus valuesnFor brightness；
Establish (XRed, YRed, ZRed)、(XGreen, YGreen, ZGreen)、(XBlue, YBlue, ZBlue) and (Xn, Yn, Zn) between relationship Formula；
According to the relation reality penetrance formula；
The tristimulus values for sampling multiple grey menus obtains sampled voltage-using sampling tristimulus values and the penetrance formula Penetrance data carry out expansion calculating to the sampled voltage-penetrance data, obtain voltage-penetrance table；
According to target gamma value, target colorimetric, (XWhite, YWhite, ZWhite) and the relational expression, the target for acquiring set-point wear Saturating rate；
The corresponding target voltage values of the target penetration rate are found in the voltage-penetrance table, or according to the electricity Pressure-penetrance meter calculates the corresponding target voltage values of the target penetration rate；
According to the target voltage values, the target register value of the set-point is set；
The relational expression is as shown in following equation 1：
(rn, gn, bn) be the n-th grayscale luminance factor group, rn、gnAnd bnRespectively red channel luminance coefficient, green channel luminance system Number and blue channel luminance factor；
Include according to penetrance formula described in the relation reality：
Using the formula 1, (r is obtainedn, gn, bn) expression formula, as shown in equation 2 helow：
The penetrance of red channel is expressed as TRn, the penetrance of green channel is expressed as TGn, the penetrance of blue channel is expressed as TBn, the penetrance formula is obtained as shown in following equation 3：
(rWhite, gWhite, bWhite) by substituting into (X in the formula 2White, YWhite, ZWhite) obtain.
10. the bearing calibration of display device gray-scale intensity and coloration as claimed in claim 9, which is characterized in that sampling is multiple The tristimulus values of grey menu includes：K group gray scale voltages are applied to the display device, obtain the K groups of corresponding K grey menu Tristimulus values；Obtaining sampled voltage-penetrance data using sampling tristimulus values and the penetrance formula includes：According to described Penetrance formula, K groups gray scale voltage and K group tristimulus values obtain the K groups voltage-penetrance data for corresponding to K grey menu.
11. the bearing calibration of display device gray-scale intensity and coloration as claimed in claim 10, which is characterized in that according to described Penetrance formula, K groups gray scale voltage and K group tristimulus values, obtaining the K groups voltage-penetrance data includes：
The K groups tristimulus values is substituted into respectively in the formula 3, K groups tristimulus values-penetrance data are obtained；
One by one according to the K groups tristimulus values-penetrance data and the K groups gray scale voltage and the K groups tristimulus values Correspondence obtains the K groups voltage-penetrance data.
12. the bearing calibration of display device gray-scale intensity and coloration as claimed in claim 11, which is characterized in that the K Group voltage-penetrance data carry out expansion calculating, and obtaining the voltage-penetrance table includes：
Expansion calculating is carried out to the K groups voltage-penetrance data using interpolation method, the interpolation method is cubic spline interpolation Method, spline of quartic interpolation method or Fifth system method；
Wherein, the calculation formula of the cubic spline interpolation is as shown in following equation 4：
In the formula 4, (Vk-1, Tk-1) and (Vk, Tk) it is the adjacent two pairs voltage-penetrance data, (V, T) is to fall (Vk-1, Tk-1) and (Vk, Tk) between voltage-penetrance data, T TRn, TGnOr TBnAny one；
The minimum voltage of the voltage-penetrance data is VMin, maximum voltage VMax；According to the formula 4, obtain including K- 1 section of voltage-penetrance calculating formula, by V from VMinStart with (VMax-VMin)/m is that step value is gradually increased to VMax, obtain m The m V values are substituted into the calculating formula by the V values being stepped up one by one, obtain m T value, and whole V values and T values constitute institute State voltage-penetrance table；
In the formula 4, hkCalculation formula as shown in following equation 5：
hk=Vk-Vk-1
In the formula 4, MkCalculation formula as shown in following equation 6：
In the formula 6, μkAnd λkCalculation formula as shown in following equation 7：
13. the bearing calibration of display device gray-scale intensity and coloration as claimed in claim 12, which is characterized in that according to described Target gamma value, target colorimetric, (XWhite, YWhite, ZWhite) and the relational expression, the target for acquiring the set-point wear Saturating rate, including：
The target colorimetric is indicated using (x, y), (x, y) is known；
According to CIE1931-xyY standard colorimetric systems, (x, the y) and (Xn, Yn, Zn) meet as shown in following equation 8：
Adjustment is obtained as shown in following equation 9：
By rWhiteIt is substituted into jointly in the formula 2 with the formula 9, obtains YMax1、gMax1And bMax1；
By gWhiteIt is substituted into jointly in the formula 2 with the formula 9, obtains YMax2、rMax2And bMax2；
By bWhiteIt is substituted into jointly in the formula 2 with the formula 9, obtains YMax3、rMax3And gMax3；
It takes in above-mentioned three groups of solutions, the one group of solution met the requirements is maximum brightness optimal solution, and the Y in the maximum brightness optimal solution makees For the corresponding highest goal brightness of maximum gray, it is expressed as YMax；
YnWith YMaxRelationship as shown in following equation 10：
Wherein, Gamma is the target gamma value；
Y is solved according to the formula 10nAfterwards, by YnIt substitutes into the formula 9 and solves XnAnd Zn；
(the X that will be solvedn, Yn, Zn) formula 3 is substituted into, obtain the target penetration rate.
14. the bearing calibration of display device gray-scale intensity and coloration as claimed in claim 13, which is characterized in that when the mesh When mark penetrance is the value in the voltage-penetrance table, worn by finding the target in the voltage-penetrance table The corresponding target voltage values of saturating rate；When the target penetration rate falls two known penetrances in the voltage-penetrance table Between when, the corresponding target voltage values of the target penetration rate are calculated according to the voltage-penetrance meter；
When target voltage values corresponding according to the voltage-penetrance meter calculating target penetration rate, using linear interpolation Method calculates the corresponding target voltage values of the target penetration rate；
The linear interpolation is as shown in following equation 11：
VK targetsAnd TK targetsThe target voltage and the target penetration rate, V are indicated respectivelyK targetsCan be red channel targets voltage, green Channel targets voltage or blue channel target voltage, corresponding, TK targetsIt can be penetrated for red channel targets penetrance, green channel targets Rate or blue channel target penetration rate, T1 and T2For described two known penetrances, V1For corresponding T1Voltage, V2For corresponding T2Electricity Pressure.
15. the bearing calibration of the display device gray-scale intensity and coloration as described in claim 9-14 any one, feature exist In the display device is OLED display.
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