CN106023954A - Correcting method for gray scale brightness and chroma of display device - Google Patents

Abstract

The invention discloses a correcting method for the gray scale brightness and chroma of a display device. The correcting method comprises the following steps: acquiring tristimulus values of a red picture, a green picture, a blue picture, a white picture and a black picture of the display device; establishing a relational expression between a tristimulus value of an nth gray scale picture and the tristimulus values of the red picture, the green picture, the blue picture, the white picture and the black picture; establishing a penetration rate formula according to the relational expression; sampling tristimulus values of a plurality of gray scale pictures, obtaining sampled voltage-penetration rate data by utilizing the sampled tristimulus values and the penetration rate formula, and further obtaining a voltage-penetration rate table; solving to obtain the target penetration rate of a set point according to the target gamma value, the target chroma, the tristimulus value of the white picture, the tristimulus value of the black picture, and the relational expression; obtaining a target voltage value according to the voltage-penetration rate table; and setting a target register value of the set point according to the target voltage value. With the adoption of the correcting method, the correcting time can be shortened, in addition, the correcting effect of each display device can be improved, and thus the display quality of each display device is improved.

Description

A kind of display device gray-scale intensity and the bearing calibration of colourity

Technical field

The present invention relates to display field, particularly relate to a kind of display device gray scale intensities and the bearing calibration of colourity.

Background technology

The picture that display device shows is made up of many small pixels.For colour display device, each pixel Generally include again red, green, blue color three sub pixel.Picture signal contains the monochrome information of each sub-pixel.Through display The conversion that processes of device shows as the brightness of each sub-pixel.The mixing of trichroism sub-pixel for emitting light is just demonstrated by seen by human eye different Brightness and color.

Owing to monochrome information and brightness are not linear corresponding, and the difference between display device monomer, existing display device Major part is required for, by adjusting internal setting, adjusting the brightness that same monochrome information finally shows, this adjustment one As be referred to as gamma correction.If red, green, blue three sub pixel is done adjustment in various degree, it is possible to change display color effect Really, this adjustment is commonly referred to as three gamma corrections.(correction) is adjusted, it is possible to obtain satisfied GTG mistake by three gamma corrections Cross and color representation.

Existing major part display device can carry out gamma correction or three gamma corrections when dispatching from the factory to each, makes every Platform display device gray-scale intensity (luminance transition) and colourity (color) performance reach optimum efficiency.The most existing major part display dress Put before dispatching from the factory, need its gray-scale intensity and colourity are adjusted, so that display device reaches optimal display effect.At present Existing method of adjustment mainly uses and adjusts manually, i.e. artificial rule of thumb and utilize a little aid that display device is entered Row sum-equal matrix, this method of adjustment is the longest so that the production efficiency of display device reduces.Such as, carry out gamma correction is arranged, one As need several tens minutes, if carried out three gamma corrections, even need several hours.

Summary of the invention

For solving the problems referred to above, the present invention provides a kind of display device gray-scale intensity and the bearing calibration of colourity, including: obtain Take display device redness picture tristimulus values, with (X_Red, Y_Red, Z_Red) represent；Obtain display device green picture tristimulus values, With (X_Green, Y_Green, Z_Green) represent；Obtain display device blue picture tristimulus values, with (X_Blue, Y_Blue, Z_Blue) represent；Obtain Take display device white picture tristimulus values, with (X_White, Y_White, Z_White) represent；Obtain display device black picture tristimulus Value, with (X_Black, Y_Black, Z_Black) represent；Use (X_n, Y_n, Z_n) representing display device the n-th grey menu tristimulus values, n is 0 Random natural number between M, M is the high gray exponent number of display device, and M is the natural number more than 2；According to CIE1931- XyY standard colorimetric system, Y in the n-th grey menu tristimulus values_nFor brightness；Set up (X_Red, Y_Red, Z_Red)、(X_Green, Y_Green, Z_Green)、(X_Blue, Y_Blue, Z_Blue)、(X_Black, Y_Black, Z_Black) and (X_n, Y_n, Z_nRelational expression between)；According to described relational expression Set up penetrance formula；The tristimulus values of multiple grey menu of sampling, utilizes sampling tristimulus values and described penetrance formula to obtain To sampled voltage-penetrance data, carry out described sampled voltage-penetrance data expanding calculating, obtain voltage-penetrance Table；According to target gamma value, target colorimetric, (X_White, Y_White, Z_White)、(X_Black, Y_Black, Z_Black) and described relational expression, ask Obtain the target penetration rate of set-point；The target voltage that described target penetration rate is corresponding is found in described voltage-penetrance table Value, or calculate, according to described voltage-penetrance table, the target voltage values that described target penetration rate is corresponding；According to described target Magnitude of voltage, arranges the target register value of described set-point.

For solving the problems referred to above, the invention provides another kind of display device gray-scale intensity and the bearing calibration of colourity, bag Include: obtain display device redness picture tristimulus values, with (X_Red, Y_Red, Z_Red) represent；Obtain display device green picture three to sting Swash value, with (X_Green, Y_Green, Z_Green) represent；Obtain display device blue picture tristimulus values, with (X_Blue, Y_Blue, Z_Blue) table Show；Obtain display device white picture tristimulus values, with (X_White, Y_White, Z_White) represent；Use (X_n, Y_n, Z_n) represent display Device the n-th grey menu tristimulus values, n is the random natural number between 0 to M, and M is the high gray exponent number of display device, and M is Natural number more than 2；According to CIE1931-xyY standard colorimetric system, Y in the n-th grey menu tristimulus values_nFor brightness；Build Vertical (X_Red, Y_Red, Z_Red)、(X_Green, Y_Green, Z_Green)、(X_Blue, Y_Blue, Z_Blue) and (X_n, Y_n, Z_nRelational expression between)；According to Described relation reality penetrance formula；The tristimulus values of multiple grey menu of sampling, utilizes sampling tristimulus values and described wears Rate formula obtains sampled voltage-penetrance data thoroughly, carries out described sampled voltage-penetrance data expanding calculating, obtains electricity Pressure-penetrance table；According to target gamma value, target colorimetric, (X_White, Y_White, Z_White) and described relational expression, try to achieve set-point Target penetration rate；The target voltage values that described target penetration rate is corresponding, or root is found in described voltage-penetrance table The target voltage values that described target penetration rate is corresponding is calculated according to described voltage-penetrance table；According to described target voltage values, if Put the target register value of described set-point.

Compared with prior art, technical scheme has the advantage that

In technical scheme, (generally include red picture, green picture, blue picture by specific grey-scale picture Face and white picture, can include black picture) tristimulus values, set up these specific grey-scale picture tristimulus values and any one The relational expression of the n-th grey menu tristimulus values, thus set up penetrance formula.Further, in a subsequent step, utilize again The mode of the tristimulus values of multiple any grey menu of sampling, obtains organizing sampling tristimulus values more, and utilizes sampling tristimulus values Obtain sampled voltage-penetrance data with described penetrance formula, carry out described sampled voltage-penetrance data expanding meter Calculate, obtain voltage-penetrance table.During this, due to sampling be each display device self multiple any GTG draw Face tristimulus values, the voltage therefore finally given-penetrance table embodies the characteristic of display device itself.Therefore, later use When this voltage-penetrance table is corrected, it is possible to ensure that correction accuracy is higher, so that the display quality after display device correction Improve.Meanwhile, during this, make use of and expand the mode calculated, shorten the time obtaining voltage-penetrance table, thus Corresponding correction time can be shortened.

Accompanying drawing explanation

Fig. 1 is the test sample gamma curve that existing bearing calibration obtains；

Fig. 2 is GTG-chromaticity coordinates graph of a relation (color coordinate characteristics curve) that existing bearing calibration obtains；

Fig. 3 is the different product high gray correspondence chromaticity coordinates value that existing bearing calibration obtains；

Fig. 4 is bearing calibration each steps flow chart schematic diagram that the embodiment of the present invention provides；

Fig. 5 is the step schematic diagram that in schematic flow sheet shown in Fig. 4, step S14 includes；

Fig. 6 is the step schematic diagram that in schematic flow sheet shown in Fig. 4, step S15 includes；

Fig. 7 is the test sample gamma curve that embodiment of the present invention bearing calibration obtains；

Fig. 8 is GTG-chromaticity coordinates graph of a relation that embodiment of the present invention bearing calibration obtains；

Fig. 9 is the different product high gray correspondence chromaticity coordinates value that embodiment of the present invention bearing calibration obtains；

Figure 10 is bearing calibration each steps flow chart schematic diagram that another embodiment of the present invention provides；

Figure 11 is the step schematic diagram that in schematic flow sheet shown in Figure 10, step S24 includes；

Figure 12 is the step schematic diagram that in schematic flow sheet shown in Figure 10, step S25 includes.

Detailed description of the invention

In existing method, also take every a collection of display device all carries out the adjustment that identical correction is arranged, it may be assumed that to a collection of Display device is all stored in (burned) with organizing corrected value.But, due to technique unstability and other difference, even if with a collection of display In device, the display effect of different display devices there is also difference.Now, if to burned with organizing correction with a collection of display device Value, it may appear that the final display gamma value curve of big quantity display apparatus does not meets the gamma 2.0 curves-gamma 2.4 of customer requirement (gamma value of usual display device requires about 2.2 the situation of curve (Gamma2.0-Gamma2.4), and allows certain model The deviation enclosed, therefore the final specification limit allowed is at 2.0-2.4).

As it is shown in figure 1, the test sample gamma curve that Fig. 1 is existing bearing calibration to be obtained.Fig. 1 specifically show therein Two test samples be corrected after gamma curve, respectively curve S1 and curve S2.Curve S1 and curve S2 falls Outside gamma 2.0-gamma 2.4 curve area defined required by client.Concrete, curve S1 falls gamma 2.0-gamma The lower section of 2.4 two curves of curve, curve S2 falls at gamma 2.0 curves-gamma 2.4 curve (with G2.0 and G2.4 table in Fig. 1 Show) top of two curves, therefore two test samples are all unsatisfactory for the specification requirement of client.As previously described, with a collection of The burned situation with group corrected value of display device, can cause the final display gamma curve of big quantity display apparatus not meet client and want Ask.

Analyze the color coordinate characteristics curve after typing same group corrected value further, find chromaticity coordinates between different display device Difference is excessive.As in figure 2 it is shown, GTG-chromaticity coordinates graph of a relation (color coordinate characteristics curve) that Fig. 2 is existing bearing calibration to be obtained, Larger difference is there is between x/y chromaticity coordinates value corresponding for curve S1 and curve S2.The x color coordinate characteristics curve curve of curve S1 X_S1 represents, the y color coordinate characteristics curve curve y_S1 of curve S1 represents, the x color coordinate characteristics curve curve of curve S2 X_S2 represents, the y color coordinate characteristics curve curve y_S2 of curve S2 represents.Fig. 2 shows curve x_S1 and curve x_S2 difference Very big, curve y_S1 and curve y_S2 difference are the biggest.Fig. 2 shows that the display quality of different display device is unstable.Namely Saying, the color coordinate characteristics curve of different display devices has relatively large deviation, the feelings that curve intermediate projections substantially and is rolled under both sides occurs Condition, causes the display gamma value of most display device beyond the specification required by client.

Fig. 3 is the different product high gray correspondence chromaticity coordinates value that existing bearing calibration obtains.Specifically, Fig. 3 is further Show that the corresponding color of the multiple different products (display device) high gray (white point GTG) using existing bearing calibration to obtain is sat Scale value.As seen from Figure 3, the chromaticity coordinates value deviation of high gray correspondence of different display devices is very big, and x/y chromaticity coordinates value difference is different It is even up to 0.015.Fig. 3 shows the situation that the display quality of different display device is unstable with becoming apparent from.

Occur that the reason of above-mentioned situation is, to a collection of display device the most burned same group value is set time, the most fully examine Considering to the display effect of different display devices different, therefore correction does not has specific aim, it is impossible to ensure that each display device reaches Specification required by client.

To this end, the present invention provides a kind of new bearing calibration, described bearing calibration can be according to each display device self Display effect feature, pointedly each display device is corrected, so that each display device can reach phase The specification requirement answered, improves the display effect of each display device.

Understandable, below in conjunction with the accompanying drawings to the present invention for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from Specific embodiment be described in detail.

One embodiment of the invention provides a kind of display device gray-scale intensity and the bearing calibration of colourity, incorporated by reference to reference to Fig. 4 To Fig. 6.

Refer to Fig. 4, Fig. 4 is bearing calibration each steps flow chart schematic diagram that the embodiment of the present invention provides.

Specifically, carry out step S11, obtain red picture, green picture, blue picture, white picture and black picture Tristimulus values (tristimulus values).

Tristimulus values is the expression causing human body retina to the amount of the stimulation degree of three kinds of primary colors of red, green and blue.This reality Executing in example, described display device includes that multiple pixel, each pixel include red sub-pixel, green sub-pixels and blueness sub-picture Element.

Obtain above-mentioned tristimulus values to specifically include: obtain display device redness picture tristimulus values, with (X_Red, Y_Red, Z_Red) Represent；Obtain display device green picture tristimulus values, with (X_Green, Y_Green, Z_Green) represent；Obtain display device blueness to draw Face tristimulus values, with (X_Blue, Y_Blue, Z_Blue) represent；Obtain display device white picture tristimulus values, with (X_White, Y_White, Z_White) represent；Obtain display device black picture tristimulus values, with (X_Black, Y_Black, Z_Black) represent.

Concrete, it is possible to use measure the above-mentioned assorted picture tristimulus values of system scanning record display device.

Carry out step S12, set up the n-th grey menu tristimulus values and red picture, green picture, blue picture and black The relational expression of the tristimulus values of picture.

In the present embodiment, use (X_n, Y_n, Z_n) representing display device the n-th grey menu tristimulus values, n is between 0 to M Random natural number, 0 be display device minimum (minimum) GTG exponent number (in this specification, GTG exponent number is the most also called for short GTG, It is not distinguish between), M is the highest (maximum) GTG exponent number of display device, and M is the natural number more than 2.

According to CIE1931-xyY standard colorimetric system, Y in the n-th grey menu tristimulus values_nFor brightness (luminance) (i.e. Y_nRepresent the human eye response to brightness).

Set up above-mentioned relation formula can also be expressed as setting up (X_Red, Y_Red, Z_Red)、(X_Green, Y_Green, Z_Green)、(X_Blue, Y_Blue, Z_Blue)、(X_Black, Y_Black, Z_Black) and (X_n, Y_n, Z_nRelational expression between).

Concrete, described relational expression is as shown in below equation one:

$\left[\begin{array}{c}{X}_n\\ Y_n\\ Z_n\end{array}\right]=\left[\begin{array}{ccc}{X}_{\mathrm{Re}d}-X_{Black}& X_{Green}-X_{Black}& X_{Blue}-X_{Black}\\ Y_{\mathrm{Re}d}-Y_{Black}& Y_{Green}-Y_{Black}& Y_{Blue}-Y_{Black}\\ Z_{\mathrm{Re}d}-Z_{Black}& Z_{Green}-Z_{Black}& Z_{Blue}-Z_{Black}\end{array}\right]\left[\begin{array}{c}{r}_n\\ g_n\\ b_n\end{array}\right]+\left[\begin{array}{c}{X}_{Black}\\ Y_{Black}\\ Z_{Black}\end{array}\right]$

(r_n, g_n, b_n) it is the luminance factor group of the n-th GTG, r_n、g_nAnd b_nIt is respectively red channel luminance coefficient, green passage bright Degree coefficient and blue channel luminance factor.

By formula one (the most described relational expression), the present embodiment makes (X_n, Y_n, Z_n) use (r_n, g_n, b_n) and other each three thorns Sharp value is expressed, thus formula one i.e. can be utilized to try to achieve the tristimulus values under corresponding GTG, it is also possible to utilize formula one (r corresponding under the conditions of trying to achieve each GTG_n, g_n, b_n), specifically it is referred to following step.

Carry out step S13, according to described relation reality penetrance formula.

In the present embodiment, include according to penetrance formula described in described relation reality:

Utilize described formula one, obtain (r_n, g_n, b_n) expression formula, as shown in below equation two:

$\left[\begin{array}{c}{r}_n\\ g_n\\ b_n\end{array}\right]={\left[\begin{array}{ccc}{X}_{\mathrm{Re}d}-X_{Black}& X_{Green}-X_{Black}& X_{Blue}-X_{Black}\\ Y_{\mathrm{Re}d}-Y_{Black}& Y_{Green}-Y_{Black}& Y_{Blue}-Y_{Black}\\ Z_{\mathrm{Re}d}-Z_{Black}& Z_{Green}-Z_{Black}& Z_{Blue}-Z_{Black}\end{array}\right]}^{-1}\×\left(\left[\begin{array}{c}{X}_n\\ Y_n\\ Z_n\end{array}\right]-\left[\begin{array}{c}{X}_{Black}\\ Y_{Black}\\ Z_{Black}\end{array}\right]\right)$

It should be noted that during setting up formula one and formula two, the present embodiment first have employed in formula one Black picture tristimulus values (X_Black, Y_Black, Z_Black) data, got rid of in order to disappear in formula two the most again Except the light leak under black picture state in display device affects.Such as when described display device is LCD display device, its black Have certain light leak under picture state, now use the present embodiment formula one and formula two can eliminate the light leak of black picture Impact on whole trimming process, thus improve correction accuracy.

After obtaining formula two, the penetrance of red channel is expressed as T_Rn, the penetrance of green channel is expressed as T_Gn, The penetrance of blue channel is expressed as T_Bn, then can obtain described penetrance formula as shown in below equation three:

$\left\{\begin{array}{c}{T}_{Rn}=\frac{r_n}{r_{White}}\\ T_{Gn}=\frac{g_n}{g_{White}}\\ T_{Bn}=\frac{b_n}{b_{White}}\end{array}\right.$

Wherein, (r_White, g_White, b_White) by described formula two substitutes into (X_White, Y_White, Z_White) obtain.

(X_White, Y_White, Z_White) be the tristimulus values of display device maximum gray, i.e. the tristimulus values of white picture.

Carry out step S14, the tristimulus values of multiple grey menu of sampling, utilize sampling tristimulus values and described penetrance public Formula obtains sampled voltage-penetrance data, carries out described sampled voltage-penetrance data expanding and calculates, and obtains voltage-penetrate Rate table.

It is the step schematic diagram that in schematic flow sheet shown in Fig. 4, step S14 includes incorporated by reference to reference Fig. 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.

Carry out step S141, described display device is applied K group gray scale voltage, obtain the K group three of corresponding K grey menu Stimulus value.

It is to say, in the present embodiment, the tristimulus values of multiple grey menu of sampling includes: apply described display device K group gray scale voltage, obtains the K group tristimulus values of corresponding K grey menu.

Same, it is possible to use the scanning of measurement system records the tristimulus values of this K grey menu.

It should be noted that during K grey menu tristimulus values of above-mentioned sampling, the more dispersion of this K grey menu All be conducive to the making of subsequent voltage-penetrance table.Therefore, K grey menu is disperseed better and better in whole grey menu, and And disperse the most uniform more good.Meanwhile, maximum gray of preferably sampling (white picture correspondence GTG) and minimum gray (black picture Corresponding GTG) tristimulus values.Owing to the present embodiment step S11 having obtained the tristimulus of the two grey menu Value, therefore, using them as when choosing described K grey menu tristimulus values, additionally it is possible to reduce sampling step, real process In, it is only necessary to the tristimulus values of re-sampling K-2 grey menu.

When having 256 GTGs of display device, the numerical range of above-mentioned K can be 10～20.In the present embodiment, choosing Select K and be equal to 16, i.e. the tristimulus values of 16 grey menu of the present embodiment sampling.

The present embodiment is concrete, to select the concrete GTG making these 16 grey menu corresponding be 0,15,23,31,47,63, 95,127,160,192,208,224,232,240,248 (wherein 0 GTG and 255 GTGs corresponding black picture respectively is grey with 255 Rank and white picture GTG, the present embodiment has obtained).Thus obtain the tristimulus of these 16 grey menu Value, and should be given data mutually for producing their 16 groups of gray scale voltages.

It should be noted that in other embodiments, display device can have other GTG exponent number, such as have 1024 GTGs, Now, accordingly, the range of choice of K value can suitably be adjusted, and the grey menu quantity i.e. sampled can adjust.

Carry out step S142, according to described penetrance formula, K group gray scale voltage and K group tristimulus values, obtain corresponding K The K group voltage-penetrance data of grey menu.

It is to say, in the present embodiment, sampling tristimulus values and described penetrance formula is utilized to obtain sampled voltage-penetrate Rate data include: according to described penetrance formula, K group gray scale voltage and K group tristimulus values, obtain the K of corresponding K grey menu Group voltage-penetrance data.

In above-mentioned K group voltage-penetrance data, often organize voltage-penetrance data all include three magnitudes of voltage and three wear Rate value thoroughly.Three magnitudes of voltage are respectively used to control three sub-pixels, and corresponding three penetration value are then respectively three sub-pictures The penetrance that element is corresponding, penetrance T of the most above-mentioned red channel_Rn, penetrance T of green channel_Gn, the penetrance of blue channel T_Bn.Owing to K is equal to 16, therefore, said process obtains the penetrance (T of 16 red channels in the lump_R0、T_R15、T_R23…… T_R255), the penetrance (T of 16 green channels_G0、T_G15、T_G23……T_G255), and the penetrance (T of 16 blue channels_B0、 T_B15、T_B23……T_B255)。

In the method that the present embodiment provides, step S142 may further include step S1421 and step S1422, such as Fig. 5 Shown in.

Carry out step S1421, described K group tristimulus values is substituted in described formula two and described formula three respectively, To K group tristimulus values-penetrance data.

Carry out step S1422, according to described K group tristimulus values-penetrance data, and described K group gray scale voltage and institute State the one-to-one relationship of K group tristimulus values, obtain described K group voltage-penetrance data.

From step S1421 and step S1422, in the present embodiment, according to described penetrance formula, described K group GTG Voltage and described K group tristimulus values, obtain described K group voltage-penetrance data and include: first, described K group tristimulus values divided Do not substitute in described formula two and described formula three, obtain K group tristimulus values-penetrance data；Then, according to described K group Tristimulus values-penetrance data, and described K group gray scale voltage and the one-to-one relationship of described K group tristimulus values, obtain institute State K group voltage-penetrance data.

Carry out step S143, use interpolation method to carry out described voltage-penetrance data expanding calculating.

It is to say, in the present embodiment, carry out described K group voltage-penetrance data expanding calculating, obtain described electricity Pressure-penetrance table includes: use interpolation method to carry out described voltage-penetrance data expanding calculating.

Described interpolation method can be cubic spline interpolation, spline of quartic interpolation method or Fifth system method.

In the present embodiment, specifically use cubic spline interpolation.Cubic spline interpolation is simplified relatively, and can guarantee that expansion After each voltage-penetrance data obtained meet precise requirements.

The computing formula of described cubic spline interpolation is as shown in below equation four:

$T=\frac{{(V_k-V)}^3}{6h_k}{M}_{k-1}+\frac{{(V-V_{k-1})}^3}{6h_k}{M}_k+(T_{k-1}-\frac{M_{k-1}{h}_k^2}{6})\frac{V_k-V}{h_k}+(T_k-\frac{M_k{h}_k^2}{6})\frac{V-V_{k-1}}{h_k}$

In described formula four, (V_k-1, T_k-1) and (V_k, T_k) it is adjacent two to described voltage-penetrance data, (V, T) is for falling At (V_k-1, T_k-1) and (V_k, T_kVoltage between)-penetrance data, T is T_Rn, T_GnOr T_BnAny one；

The minimum voltage of described voltage-penetrance data is V_Min, maximum voltage is V_Max；According to described formula four, obtain Comprise the voltage-penetrance calculating formula of K-1 section, by V from V_MinStart with (V_Max-V_Min)/m is that step value is gradually increased to V_Max, Obtain m the V-value being stepped up, described m V-value is substituted into described calculating formula one by one, obtain m T value, whole V-value and T value i.e. Constitute described voltage-penetrance table.

In the present embodiment, as required, m can be 500.Generally, maximum voltage is V_MaxFor about 5V (certainly, according to not Difference is had with display device), and minimum voltage is V_MinFor 0V.When m is 500, be equivalent to made voltage-penetrance In table, being often separated by 0.01V just has a pair voltage-penetration value, voltage now-penetrance table to have enough precision for rear The correction of continuous display device.In other embodiments, m can also take other numerical value.

In described formula four, h_kComputing formula as shown in below equation five:

h_k=V_k-V_k-1

In described formula four, M_kComputing formula as shown in below equation six:

In described formula six, μ_kAnd λ_kComputing formula as shown in below equation seven:

$\left\{\begin{array}{c}{\mathrm{\μ}}_k=\frac{h_k}{h_k+h_{k+1}},{\mathrm{\λ}}_k=\frac{h_{k+1}}{h_k+h_{k+1}}\\ d_k=\frac{6}{h_k+h_{k+1}}\left(\frac{T_{k+1}-T_k}{h_{k+1}}-\frac{T_k-T_{k-1}}{h_k}\right)\end{array}\right.,k=1,2,\mathrm{...},K-2.$

After completion of the above process, a large amount of voltages-penetrance data obtained represent the most in a tabular form, are described Voltage-penetrance table.Described voltage-penetrance table actually includes red channel voltage-penetrance table, green channel voltage-wear Rate table and blue channel voltage-penetrance table thoroughly.When m is equal to 500, each table has 500 pairs of voltage-penetration value.

In the present embodiment step S14, by the method for display device difference grey menu tristimulus values of sampling, it is thus achieved that many groups Tristimulus values (when m is equal to 500, one has 500 groups of tristimulus values), the tristimulus values obtained during this is all each display The characteristic of device self.On the basis of follow-up voltage-penetrance table is built upon these tristimulus values, therefore, obtained Voltage-penetrance table there is significant specific aim, it is possible to the accurately correction for bearing calibration provides safeguard.

Meanwhile, in step S14, after many group tristimulus values substitution penetrance formula will be obtained, obtain sampled voltage-penetrance Data, then utilize and expand the mode calculated, obtain more data, thus obtain voltage-penetrance table.Aforementioned sample process Expand calculations incorporated with this, test one by one from without to each voltage-penetrance data, shorten timing Between, so that whole trimming process is the shortest.

With continued reference to Fig. 4, carry out step S15, according to target gamma value, target colorimetric, described relational expression, white picture and The tristimulus values of black picture, tries to achieve the target penetration rate of set-point.

This step that is according to target gamma value, target colorimetric, (X_White, Y_White, Z_White)、(X_Black, Y_Black, Z_Black) With described relational expression, try to achieve the target penetration rate of set-point.

Incorporated by reference to being the step schematic diagram that in schematic flow sheet shown in Fig. 4, step S15 includes with reference to Fig. 4 and Fig. 6, Fig. 6, originally Embodiment provide method in, step S15 may further include step S151, step S152, step S153, step S154, Step S155 and step S156.

First, carry out step S151, according to CIE1931-xyY standard colorimetric system, set up formula nine.Step S151 bag Include: (x, y) represents described target colorimetric, and x represents that red component, y represent green component in employing.(x, y) be it is known that because (x, Y) it is usually client to directly give.In the case of known to red component and green component, due to red component, green component and Always equal to 1 after blue component, therefore, also correspond to be aware of blue component.

According to CIE1931-xyY standard colorimetric system, (x, y) with (X_n, Y_n, Z_n) meet as shown in below equation eight:

$x=\frac{X_n}{X_n+Y_n+Z_n}$

$y=\frac{Y_n}{X_n+Y_n+Z_n}$

Adjustment obtains as shown in below equation nine:

$\left\{\begin{array}{c}{X}_n=\frac{x}{y}\×Y_n\\ Z_n=\frac{(1-x-y)}{y}\×Y_n\end{array}\right.$

Carry out step S152, r_White、g_WhiteAnd b_WhiteSubstitute into formula two respectively, try to achieve maximum brightness Y_MaxOptimal solution.

In the present embodiment, owing to display device is 256 GTGs, therefore, r_White、g_WhiteAnd b_WhiteRespectively with theoretic High-high brightness coefficient r₂₅₅、g₂₅₅And b₂₅₅Close, but it is not completely equivalent again, and this is due to the character of each display device self Determine.

Step S152 specifically includes: by r_WhiteJointly substitute in described formula two with described formula nine, obtain Y_Max1、g_Max1 And b_Max1；By g_WhiteJointly substitute in described formula two with described formula nine, obtain Y_Max2、r_Max2And b_Max2；By b_WhiteWith described Formula nine substitutes in described formula two jointly, obtains Y_Max3、r_Max3And g_Max3；Take in above-mentioned three groups of solutions, meet the one group of solution required For maximum brightness optimal solution, the Y in described maximum brightness optimal solution, as highest goal brightness corresponding to maximum gray, is expressed as Y_Max。

During above-mentioned steps S152, three groups of solutions are respectively as follows: first group, Y_Max1With (r_White, g_Max1, b_Max1)；Second group, Y_Max2With (r_Max2, g_White, b_Max2)；3rd group, Y_Max3With (r_Max3, g_Max3, b_White).In these three groups of solutions, at least one group of solution pair The luminance factor answered is to disclosure satisfy that the most accordingly less than or equal to (r_White, g_White, b_White).Now it is divided into three groups of situations: when Luminance factor corresponding to three groups of solutions is satisfied by less than or equal to (r_White, g_White, b_White) time, Y_Max1、Y_Max2And Y_Max3It is optional Highest goal brightness, now selects maximum in three one as final highest goal brightness Y_Max；When having, two groups of solutions are corresponding Luminance factor meets less than or equal to (r_White, g_White, b_White) time, Y_Max1、Y_Max2And Y_Max3Having two of which is the highest optional mesh Mark brightness, now selects bigger in the two one as final highest goal brightness Y_Max；When only one group solution is corresponding Luminance factor meets less than or equal to (r_White, g_White, b_White) time, brightness (the i.e. Y that this group luminance factor is corresponding_Max1、Y_Max2With Y_Max3One of them) as final highest goal brightness Y_Max。

Carry out step S153, r_Black、g_BlackAnd b_BlackSubstitute into formula two respectively, try to achieve minimum brightness Y_MinOptimal solution.

Step S153 specifically includes: by r_BlackJointly substitute in described formula two with described formula nine, obtain Y_Min1、g_Min1 And b_Min1；By g_BlackJointly substitute in described formula two with described formula nine, obtain Y_Min2、r_Min2And b_Min2；By b_BlackWith described Formula nine substitutes in described formula two jointly, obtains Y_Min3、r_Min3And g_Min3；r_Black、g_BlackAnd b_BlackBy in described formula two Substitute into X_Black、Y_Black、Z_BlackObtain；Taking in above-mentioned three groups of solutions, meeting the one group of solution required is minimum brightness optimal solution, described Y in minimum brightness optimal solution, as minimum object brightness corresponding to minimum gray, is expressed as Y_Min。

During above-mentioned steps S153, three groups of solutions are respectively as follows: first group, Y_Min1With (r_Black, g_Min1, b_Min1)；Second group, Y_Min2With (r_Min2, g_Black, b_Min2)；3rd group, Y_Min3With (r_Min3, g_Min3, b_Black).In these three groups of solutions, at least one group of solution pair The luminance factor answered is to disclosure satisfy that the most accordingly less than or equal to (r_Black, g_Black, b_Black).Now it is divided into three groups of situations: when Luminance factor corresponding to three groups of solutions is satisfied by less than or equal to (r_Black, g_Black, b_Black) time, Y_Min1、Y_Min2And Y_Min3It is optional Minimum object brightness, now selects minimum in three one as final minimum object brightness Y_Min；When having, two groups of solutions are corresponding Luminance factor meets less than or equal to (r_Black, g_Black, b_Black) time, Y_Min1、Y_Min2And Y_Min3Having two of which is optional minimum mesh Mark brightness, now selects less in the two one as final minimum object brightness Y_Min；When only one group solution is corresponding Luminance factor meets less than or equal to (r_Black, g_Black, b_Black) time, brightness (the i.e. Y that this group luminance factor is corresponding_Min1、Y_Min2With Y_Min3One of them) as final minimum object brightness Y_Min。

Carry out step S154, by Y_nWith Y_MaxAnd Y_MinBetween equation try to achieve Y_n。

Y_nWith Y_MaxAnd Y_MinBetween relation as shown in below equation ten:

$Y_n={\left(\frac{n}{M}\right)}^{Gamma}\×(Y_{Max}-Y_{Min})+Y_{Min}$

Gamma in formula ten is described target gamma value, and usual target gamma value is given by customer requirement, and generally Selecting about 2.2, target gamma value can have certain domain of walker simultaneously, is finally usually chosen between 2.0 to 2.4. In the present embodiment, in order to make the Y tried to achieve_nMore accurate, can directly select and substitute into formula ten using 2.2 as Gamma.

In said process, try to achieve Y_MaxAnd Y_Min, try to achieve corresponding object brightness corresponding for GTG exponent number n further according to formula ten Y_n, this process is that the object brightness that each GTG is corresponding is re-started normalization process.This normalization process makes each Object brightness Y that GTG is corresponding_nCan be drawn by formula ten, and during this normalization, each object brightness Y_nAll According to above-mentioned accurate calculated Y_MaxAnd Y_MinAnd draw, therefore, make object brightness Y that each GTG is corresponding_nMore accurate.

Carry out step S155, solve Y according to described formula ten_nAfter, by Y_nSubstitute into described formula nine and solve X_nAnd Z_n。

Carry out step S156, (the X that will solve_n, Y_n, Z_n) substitute into described formula three, obtain described target penetration rate.

The above step S151 to the process of step S155 i.e. tries to achieve the target tristimulus values (X of set-point_n, Y_n, Z_n) Process, then the process of recycle step S156 obtains target penetration rate.

At this it should be noted that as shown in Figure 4, in the present embodiment, step S13 and two steps of step S14 and step S15 is parallel, does not has strict sequencing between them, can each carry out, and therefore, in other embodiments, they can To carry out simultaneously, it is also possible to first carry out step S15, then carry out step S13 and step S14, it is also possible to carrying out the same of step S15 Shi Jinhang step S13 and step S14.Same, it will be appreciated from fig. 6 that step S151 and the other three step step S152, step Rapid S153 and step S154 are parallel, and step S152 and step S153 are parallel.

Carry out step S16, described voltage-penetrance table finds the target voltage that described target penetration rate is corresponding Value, or calculate, according to described voltage-penetrance table, the target voltage values that described target penetration rate is corresponding.

In the present embodiment, when value during described target penetration rate is described voltage-penetrance, by described voltage- Penetrance table finds the target voltage values that described target penetration rate is corresponding；When described target penetration rate fall described voltage- Time between two known penetrances in penetrance table, calculate described target penetration rate pair according to described voltage-penetrance table The target voltage values answered.

When calculating target voltage values corresponding to described target penetration rate according to described voltage-penetrance table, use straight line Interpolation calculation goes out the target voltage values that described target penetration rate is corresponding.

Described linear interpolation is as shown in below equation 11:

V_{K target}And T_{K target}Represent described target voltage and described target penetration rate, V respectively_{K target}It can be red channel targets electricity Pressure, green channel targets voltage or blue channel target voltage, corresponding, T_{K target}Can be red channel targets penetrance, green passage mesh Mark penetrance or blue channel target penetration rate, T₁And T₂For the known penetrance of said two, V₁For corresponding T₁Voltage, V₂For correspondence T₂Voltage.

According to above-mentioned formula 11, can be in the hope of target voltage V_{K target}。

Carry out step S17, according to described target voltage values V_{K target}, the target register value of described set-point is set.

In the present embodiment, target register value can be deposited with in the depositor of display device, so that the ash of display device Rank brightness and colourity all reach specification needed for client.And then make the luminance transition of every display device and color representation reach more Good effect.The quantity of set-point is different according to the difference of display device.Such as to some display device, from minimum gray scale to High gray, can have 30 set-points, or the set-point of other quantity.After whole set-points are all configured, carry out Burning, i.e. completes the correction to display device.

In display device gray-scale intensity that the present embodiment is provided and the bearing calibration of colourity, by step S11, step S12, step S13 and step S14, it is thus achieved that the voltage of display device-penetrance table, by step S11, step S12 and step S15, it is thus achieved that target penetration rate.Then target voltage values is obtained (i.e. according to target penetration rate and described electricity by step S16 Pressure-penetrance table obtains target voltage values), finally carry out step S17 and complete the correction to display device.During whole, by It is each own voltage-penetrance of each display device, therefore, described bearing calibration in the voltage obtained-penetrance table There is with strong points and correction result advantage accurately.Further, step S14 used during obtaining voltage-penetrance table Employing sampling and the mode expanded is carried out, therefore, described bearing calibration can quickly obtain corresponding voltage-penetrance table, And then can rapidly the GTG of display device excessively be corrected to required preset value with chroma control.Finally, described correction side Method ensures that display device GTG excessively all improves with the accuracy that shows of colourity and homogeneity, thus improves the display of display device Quality, and save the corresponding adjustment time.

In the present embodiment, on the one hand, for a display device, display state when dispatching from the factory it sets up electricity after sampling Pressure-penetrance table, therefore, in the present embodiment, the precision of regulation is higher；On the other hand, interpolation method is utilized to be extended obtaining electricity Pressure-penetrance table, therefore, the shortest.

This enforcement is compared with prior art, it is not necessary to build library lookup, saves the searching typical sample (Golden before operation Sample) build the time in storehouse, accelerate raw field flow journey and produce line beat such that it is able to significantly shortening the time of three gamma corrections.And And owing to using, in process of production each display device is adjusted targetedly correction, thus ensure production With colourity performance preferably, the display quality of display device is excellent in all device brightness.

By multiple specific products are tested, when using the bearing calibration of the above embodiment of the present invention to display device When being corrected, not only correction result meets customer requirement, and, when a display device is corrected, time-consumingly can contract Within being as short as 10 seconds.

It is the test sample gal that embodiment of the present invention bearing calibration obtains that concrete correction test result refer to Fig. 7, Fig. 7 Horse curve, specifically, Fig. 7 shows after using the bearing calibration of the above embodiment of the present invention to be corrected display device, The test sample gamma curve arrived.Fig. 7 specifically show the gamma curve after two test samples therein are corrected, respectively For curve S3 and curve S4.Curve S3 and curve S4 falls at the gamma 2.0 curves-gamma 2.4 curve (figure required by client Representing with G2.0 and G2.4 in 7) in area defined, specifically, curve S3 and curve S4 is the most overlapped.The most just Being to say, the two test sample all meets the specification requirement of client, and the display performance concordance of two test samples is high.By Bearing calibration in the present embodiment is corrected one by one for the characteristic of each display device itself so that with a collection of display device Burned different calibration settings respectively, so that the final display gamma curve of each display device meets the requirements of the customers.

Fig. 7 Yu Fig. 1 contrasts, and can intuitively obtain, compared to existing bearing calibration, the bearing calibration school of the embodiment of the present invention Positive result is more preferable.

Analyze the color coordinate characteristics curve after typing same group corrected value further, find chromaticity coordinates between different display device Difference is the least.As shown in Figure 8, there is smaller difference between corresponding for curve S3 and curve S4 x/y chromaticity coordinates value.The x of curve S3 Color coordinate characteristics curve curve x_S3 represents, the y color coordinate characteristics curve curve y_S3 of curve S3 represents, the x of curve S4 Color coordinate characteristics curve curve x_S4 represents, the y color coordinate characteristics curve curve y_S4 of curve S4 represents.Fig. 8 shows song Line x_S3 and curve x_S4 difference are the least, and a lot of parts essentially coincide；Curve y_S3 and curve y_S4 difference are the least, a lot of portions Divide and essentially coincide.Demonstrate again that the display quality of different display device is stable.It is to say, the chromaticity coordinates of different display devices is special Linearity curve deviation is the least, and the display gamma value of each display device meets the specification required by client.

It is GTG-chromaticity coordinates graph of a relation that embodiment of the present invention bearing calibration obtains with continued reference to Fig. 8, Fig. 8.Fig. 8 and Fig. 2 Contrast, can more can be visually seen, after being corrected by the bearing calibration of the embodiment of the present invention, and the display quality of display device Stability improves.Specifically, curve x_S3 and curve x_S4 is mostly in overlap condition in fig. 8, and only small part has micro- Little separation；Similarly, curve y_S3 and curve y_S4 is mostly in overlap condition in fig. 8, and only small part has small Separation.

Further, Fig. 9 is the different product high gray correspondence chromaticity coordinates value that embodiment of the present invention bearing calibration obtains. It is the highest that Fig. 9 show further the multiple different products (display device) using the bearing calibration of the above embodiment of the present invention to obtain The corresponding chromaticity coordinates value of GTG (white point GTG).It will be seen from figure 9 that the chromaticity coordinates value of high gray correspondence of different display devices is inclined Difference is the least, and x/y chromaticity coordinates value difference is different basic within 0.002.Fig. 9 shows the display product of different display device with becoming apparent from Matter is stable.

Fig. 9 Yu Fig. 3 contrasts, and can more can be visually seen, after being corrected by the bearing calibration of the embodiment of the present invention, aobvious The display quality stability of showing device improves.It should be noted that in Fig. 9 and Fig. 3, sample point number is identical, is i.e. both for Equal number of product carries out testing the result obtained.In fig .9, all of sample point all concentrates on a less region； And in figure 3, the region of all sample points distribution is bigger.

Another embodiment of the present invention provides another kind of display device gray-scale intensity and the bearing calibration of colourity, incorporated by reference to reference Figure 10 to Figure 12.Figure 10 is bearing calibration each steps flow chart schematic diagram that another embodiment of the present invention provides, and Figure 11 is Figure 10 institute Showing the step schematic diagram that in schematic flow sheet, step S24 includes, Figure 12 is that in schematic flow sheet shown in Figure 10, step S25 includes Step schematic diagram.

Refer to Figure 10, carry out step S21, obtain red picture, green picture, blue picture and three thorns of white picture Swash value.

Obtain above-mentioned tristimulus values to specifically include: obtain display device redness picture tristimulus values, with (X_Red, Y_Red, Z_Red) Represent；Obtain display device green picture tristimulus values, with (X_Green, Y_Green, Z_Green) represent；Obtain display device blueness to draw Face tristimulus values, with (X_Blue, Y_Blue, Z_Blue) represent；Obtain display device white picture tristimulus values, with (X_White, Y_White, Z_White) represent；Obtain display device black picture tristimulus values, with (X_Black, Y_Black, Z_Black) represent.

Concrete, it is possible to use measure the above-mentioned assorted picture tristimulus values of system scanning record display device.

In the present embodiment, do not obtain black picture tristimulus values, now, be particularly suitable under black picture state not having The display device of light leak, therefore, in the present embodiment, described display device is chosen as OLED display, works as OLED display When using the bearing calibration of the present embodiment, it is possible to reach more preferable calibration result.

It should be noted that when not obtaining black picture tristimulus values, the bearing calibration of the present embodiment can also be answered For other display device, such as light leak state to the correct influences of display device less time, the bearing calibration of the present embodiment It is readily adaptable for use in LCD display device.

Carry out step S22, set up the n-th grey menu tristimulus values and red picture, green picture and the three of blue picture The relational expression of stimulus value.

In the present embodiment, use (X_n, Y_n, Z_n) representing display device the n-th grey menu tristimulus values, n is between 0 to M Random natural number, 0 is minimum (minimum) GTG exponent number of display device, and M is the highest (maximum) GTG exponent number of display device, M For the natural number more than 2.

According to CIE1931-xyY standard colorimetric system, Y in the n-th grey menu tristimulus values_nFor brightness.

Set up above-mentioned relation formula can also be expressed as setting up (X_Red, Y_Red, Z_Red)、(X_Green, Y_Green, Z_Green)、(X_Blue, Y_Blue, Z_Blue) and (X_n, Y_n, Z_nRelational expression between).

Concrete, described relational expression is as shown in equation 1 below:

$\left[\begin{array}{c}{X}_n\\ Y_n\\ Z_n\end{array}\right]=\left[\begin{array}{ccc}{X}_{\mathrm{Re}d}& X_{Green}& X_{Blue}\\ Y_{\mathrm{Re}d}& Y_{Green}& Y_{Blue}\\ Z_{\mathrm{Re}d}& Z_{Green}& Z_{Blue}\end{array}\right]\left[\begin{array}{c}{r}_n\\ g_n\\ b_n\end{array}\right]$

(r_n, g_n, b_n) it is the luminance factor group of the n-th GTG, r_n、g_nAnd b_nIt is respectively red channel luminance coefficient, green passage bright Degree coefficient and blue channel luminance factor.

By formula 1 (the most described relational expression), the present embodiment makes (X_n, Y_n, Z_n) use (r_n, g_n, b_n) and other each three thorns Sharp value is expressed, thus formula 1 i.e. can be utilized to try to achieve the tristimulus values under corresponding GTG, it is also possible to utilize formula 1 to ask (r corresponding under the conditions of obtaining each GTG_n, g_n, b_n), specifically it is referred to following step.

Carry out step S23, according to described relation reality penetrance formula.

In the present embodiment, include according to penetrance formula described in described relation reality:

Utilize described formula 1, obtain (r_n, g_n, b_n) expression formula, as shown in equation 2 helow:

$\left[\begin{array}{c}{r}_n\\ g_n\\ b_n\end{array}\right]={\left[\begin{array}{ccc}{X}_{\mathrm{Re}d}& X_{Green}& X_{Blue}\\ Y_{\mathrm{Re}d}& Y_{Green}& Y_{Blue}\\ Z_{\mathrm{Re}d}& Z_{Green}& Z_{Blue}\end{array}\right]}^{-1}\×\left[\begin{array}{c}{X}_n\\ Y_n\\ Z_n\end{array}\right]$

Then, the penetrance of red channel is expressed as T_Rn, the penetrance of green channel is expressed as T_Gn, wearing of blue channel Rate is expressed as T thoroughly_Bn, then can obtain described penetrance formula as shown in equation 3 below:

$\left\{\begin{array}{c}{T}_{Rn}=\frac{r_n}{r_{White}}\\ T_{Gn}=\frac{g_n}{g_{White}}\\ T_{Bn}=\frac{b_n}{b_{White}}\end{array}\right.$

Wherein, (r_White, g_White, b_White) by described formula 2 substitutes into (X_White, Y_White, Z_White) obtain.

(X_White, Y_White, Z_White) be the tristimulus values of display device maximum gray, i.e. the tristimulus values of white picture.

Carry out step S24, the tristimulus values of multiple grey menu of sampling, utilize sampling tristimulus values and described penetrance public Formula obtains sampled voltage-penetrance data, carries out described sampled voltage-penetrance data expanding and calculates, and obtains voltage-penetrate Rate table.

Incorporated by reference to reference to Figure 10 and Figure 11, in the method that the present embodiment provides, step S24 may further include step S241, step S242 and step S243.

Carry out step S241, described display device is applied K group gray scale voltage, obtain the K group three of corresponding K grey menu Stimulus value.

It is to say, in the present embodiment, the tristimulus values of multiple grey menu of sampling includes: apply described display device K group gray scale voltage, obtains the K group tristimulus values of corresponding K grey menu.

Same, it is possible to use the scanning of measurement system records the tristimulus values of this K grey menu.

It should be noted that during K grey menu tristimulus values of above-mentioned sampling, the more dispersion of this K grey menu All be conducive to the making of subsequent voltage-penetrance table.Therefore, K grey menu is disperseed better and better in whole grey menu, and And disperse the most uniform more good.Meanwhile, maximum gray of preferably sampling (white picture correspondence GTG) and minimum gray (black picture Corresponding GTG) tristimulus values.Owing to the present embodiment step S21 having obtained the tristimulus values of white picture GTG, Therefore, using them as when choosing described K grey menu tristimulus values, additionally it is possible to reduce sampling step, in real process, only Need the tristimulus values of re-sampling K-1 grey menu.

When having 256 GTGs of display device, the numerical range of above-mentioned K can be 10～20.In the present embodiment, choosing Select K equal to 16.

It should be noted that in other embodiments, display device can have other ash exponent number, such as have 1024 GTGs, this Time, accordingly, K value can suitably be adjusted.

The i.e. tristimulus values of 16 grey menu of the present embodiment sampling.The present embodiment is concrete, selects to make this 16 GTGs The concrete GTG that picture is corresponding is 0,15,23,31,47,63,95,127,160,192,208,224,232,240,248 and 255 (wherein 255 GTG white picture GTG, the present embodiment has obtained).Thus obtain this 16 grey menu Tristimulus values, and should be given data mutually for producing their 16 groups of gray scale voltages.

Carry out step S242, according to described penetrance formula, K group gray scale voltage and K group tristimulus values, obtain corresponding K The K group voltage-penetrance data of grey menu.

It is to say, in the present embodiment, sampling tristimulus values and described penetrance formula is utilized to obtain sampled voltage-penetrate Rate data include: according to described penetrance formula, K group gray scale voltage and K group tristimulus values, obtain the K of corresponding K grey menu Group voltage-penetrance data.

In above-mentioned K group voltage-penetrance data, often organize voltage-penetrance data all include three magnitudes of voltage and three wear Rate value thoroughly.Three magnitudes of voltage are respectively used to control three sub-pixels, and corresponding three penetration value are then respectively three sub-pictures The penetrance that element is corresponding, penetrance T of the most above-mentioned red channel_Rn, penetrance T of green channel_Gn, the penetrance of blue channel T_Bn.Owing to K is equal to 16, therefore, said process obtains the penetrance (T of 16 red channels in the lump_R0、T_R15、T_R23…… T_R255), the penetrance (T of 16 green channels_G0、T_G15、T_G23……T_G255), and the penetrance (T of 16 blue channels_B0、 T_B15、T_B23……T_B255)。

In the method that the present embodiment provides, step S242 may further include step S2421 and step S2422, such as figure Shown in 11.

Carry out step S2421, described K group tristimulus values is substituted in described formula 2 and described formula 3 respectively, obtains K Group tristimulus values-penetrance data.

Carry out step S2422, according to described K group tristimulus values-penetrance data, and described K group gray scale voltage and institute State the one-to-one relationship of K group tristimulus values, obtain described K group voltage-penetrance data.

From step S2421 and step S2422, in the present embodiment, according to described penetrance formula, described K group GTG Voltage and described K group tristimulus values, obtain described K group voltage-penetrance data and include: first, described K group tristimulus values divided Do not substitute in described formula 2 and described formula 3, obtain K group tristimulus values-penetrance data；Then, according to described K group three Stimulus value-penetrance data, and described K group gray scale voltage and the one-to-one relationship of described K group tristimulus values, obtain described K group voltage-penetrance data.

Carry out step S243, use interpolation method to carry out described voltage-penetrance data expanding calculating.

It is to say, in the present embodiment, carry out described K group voltage-penetrance data expanding calculating, obtain described electricity Pressure-penetrance table includes: use interpolation method to carry out described voltage-penetrance data expanding calculating.

Described interpolation method can be cubic spline interpolation, spline of quartic interpolation method or Fifth system method.

In the present embodiment, specifically use cubic spline interpolation.Cubic spline interpolation is simplified relatively, and can guarantee that expansion After each voltage-penetrance data obtained meet precise requirements.

The computing formula of described cubic spline interpolation is as shown in equation 4 below:

$T=\frac{{(V_k-V)}^3}{6h_k}{M}_{k-1}+\frac{{(V-V_{k-1})}^3}{6h_k}{M}_k+(T_{k-1}-\frac{M_{k-1}{h}_k^2}{6})\frac{V_k-V}{h_k}+(T_k-\frac{M_k{h}_k^2}{6})\frac{V-V_{k-1}}{h_k}$

In described formula 4, (V_k-1, T_k-1) and (V_k, T_k) it is adjacent two to described voltage-penetrance data, (V, T) is for falling At (V_k-1, T_k-1) and (V_k, T_kVoltage between)-penetrance data, T is T_Rn, T_GnOr T_BnAny one；

The minimum voltage of described voltage-penetrance data is V_Min, maximum voltage is V_Max；According to described formula 4, wrapped Voltage containing K-1 section-penetrance calculating formula, by V from V_MinStart with (V_Max-V_Min)/m is that step value is gradually increased to V_Max, To m the V-value being stepped up, described m V-value is substituted into described calculating formula one by one, obtains m T value, whole V-value and T value i.e. structure Become described voltage-penetrance table.

In the present embodiment, as required, m can be 500.In other embodiments, m can also take other numerical value.

In described formula 4, h_kComputing formula as shown in equation 5 below:

h_k=V_k-V_k-1

In described formula 4, M_kComputing formula as shown in equation 6 below:

In described formula 6, μ_kAnd λ_kComputing formula as shown in equation 7 below:

$\left\{\begin{array}{c}{\mathrm{\μ}}_k=\frac{h_k}{h_k+h_{k+1}},{\mathrm{\λ}}_k=\frac{h_{k+1}}{h_k+h_{k+1}}\\ d_k=\frac{6}{h_k+h_{k+1}}\left(\frac{T_{k+1}-T_k}{h_{k+1}}-\frac{T_k-T_{k-1}}{h_k}\right)\end{array}\right.,k=1,2,\mathrm{...},K-2.$

After completion of the above process, a large amount of voltages-penetrance data obtained represent the most in a tabular form, are described Voltage-penetrance table.Described voltage-penetrance table actually includes and includes red channel voltage-penetrance table, green passage electricity Pressure-penetrance table and blue channel voltage-penetrance table.When m is equal to 500, each table has 500 pairs of voltage-penetrances Value.

In the present embodiment step S24, by the method for display device difference grey menu tristimulus values of sampling, it is thus achieved that many groups Tristimulus values (when m is equal to 500, one has 500 groups of tristimulus values), the tristimulus values obtained during this is all each display The characteristic of device self.On the basis of follow-up voltage-penetrance table is built upon these tristimulus values, therefore, obtained Voltage-penetrance table there is significant specific aim, it is possible to the accurately correction for bearing calibration provides safeguard.Meanwhile, step S24 In, after many group tristimulus values substitution penetrance formula will be obtained, obtain sampled voltage-penetrance data, then utilize and expand meter The mode calculated, obtains more data, thus obtains voltage-penetrance table.Aforementioned sample process and this expansion calculations incorporated, Test one by one from without to each voltage-penetrance data, shorten correction time, corrected so that whole Journey is the shortest.

With continued reference to Figure 10, carry out step S25, according to target gamma value, target colorimetric, described relational expression and white picture Tristimulus values, try to achieve the target penetration rate of set-point.

This step that is according to target gamma value, target colorimetric, (X_White, Y_White, Z_White) and described relational expression, try to achieve The target penetration rate of set-point.

Incorporated by reference to reference to Figure 10 and Figure 12, in the method that the present embodiment provides, step S25 may further include step S251, step S252, step S253, step S254, step S255 and step S256.

First, carry out step S251, according to CIE1931-xyY standard colorimetric system, set up formula 9.Step S251 bag Include: (x, y) represents described target colorimetric, and x represents that red component, y represent green component in employing.(x, y) be it is known that because (x, Y) it is usually client to directly give.In the case of known to red component and green component, due to red component, green component and Always equal to 1 after blue component, therefore, also correspond to be aware of blue component.

According to CIE1931-xyY standard colorimetric system, (x, y) with (X_n, Y_n, Z_n) meet as shown in equation 8 below:

$x=\frac{X_n}{X_n+Y_n+Z_n}$

$y=\frac{Y_n}{X_n+Y_n+Z_n}$

Adjustment obtains as shown in equation 9 below:

$\left\{\begin{array}{c}{X}_n=\frac{x}{y}\×Y_n\\ Z_n=\frac{(1-x-y)}{y}\×Y_n\end{array}\right.$

Carry out step S252, r_White、g_WhiteAnd b_WhiteSubstitute into formula 2 respectively, try to achieve maximum brightness Y_MaxOptimal solution.

In the present embodiment, owing to display device is 256 GTGs, therefore, r_White、g_WhiteAnd b_WhiteRespectively with theoretic High-high brightness coefficient r₂₅₅、g₂₅₅And b₂₅₅Close, but it is not completely equivalent again, and this is due to the character of each display device self Determine.

Step S252 specifically includes: by r_WhiteJointly substitute in described formula 2 with described formula 9, obtain Y_Max1、g_Max1With b_Max1；By g_WhiteJointly substitute in described formula 2 with described formula 9, obtain Y_Max2、r_Max2And b_Max2；By b_WhiteWith described formula 9 substitute in described formula 2 jointly, obtain Y_Max3、r_Max3And g_Max3；Taking in above-mentioned three groups of solutions, it is the highest for meeting the one group of solution required Brightness optimal solution, the Y in described maximum brightness optimal solution, as highest goal brightness corresponding to maximum gray, is expressed as Y_Max。

During above-mentioned steps S252, three groups of solutions are respectively as follows: first group, Y_Max1With (r_White, g_Max1, b_Max1)；Second group, Y_Max2With (r_Max2, g_White, b_Max2)；3rd group, Y_Max3With (r_Max3, g_Max3, b_White).In these three groups of solutions, at least one group of solution pair The luminance factor answered is to disclosure satisfy that the most accordingly less than or equal to (r_White, g_White, b_White).Now it is divided into three groups of situations: when Luminance factor corresponding to three groups of solutions is satisfied by less than or equal to (r_White, g_White, b_White) time, Y_Max1、Y_Max2And Y_Max3It is optional Highest goal brightness, now selects maximum in three one as final highest goal brightness Y_Max；When having, two groups of solutions are corresponding Luminance factor meets less than or equal to (r_White, g_White, b_White) time, Y_Max1、Y_Max2And Y_Max3Having two of which is the highest optional mesh Mark brightness, now selects bigger in the two one as final highest goal brightness Y_Max；When only one group solution is corresponding Luminance factor meets less than or equal to (r_White, g_White, b_White) time, brightness (the i.e. Y that this group luminance factor is corresponding_Max1、Y_Max2With Y_Max3One of them) as final highest goal brightness Y_Max。

Carry out step S253, by Y_nWith Y_MaxBetween equation try to achieve Y_n。

Y_nWith Y_MaxBetween relation as shown in equation 10 below:

$Y_n={\left(\frac{n}{M}\right)}^{Gamma}\×Y_{Max}$

Gamma in formula 10 is described target gamma value.In the present embodiment, formula can be substituted into 2.2 as Gamma 10。

In said process, try to achieve Y_Max, try to achieve corresponding object brightness Y corresponding for GTG exponent number n further according to formula 10_n, this Individual process is that the object brightness that each GTG is corresponding is re-started normalization process.This normalization process makes each GTG pair Object brightness Y answered_nCan be drawn by formula ten, and during this normalization, each object brightness Y_nAll according to upper State accurate calculated Y_MaxAnd draw, therefore, make object brightness Y that each GTG is corresponding_nMore accurate.

Carry out step S254, solve Y according to described formula 10_nAfter, by Y_nSubstitute into described formula 9 and solve X_nAnd Z_n。

Carry out step S255, (the X that will solve_n, Y_n, Z_n) substitute into described formula 3, obtain described target penetration rate.

The above step S251 to the process of step S254 i.e. tries to achieve the target tristimulus values (X of set-point_n, Y_n, Z_n), Then the process of recycle step S255 obtains target penetration rate.

At this it should be noted that as shown in Figure 10, in the present embodiment, step S23 and two steps of step S24 and step S25 is parallel, does not has strict sequencing between them, can each carry out, and therefore, in other embodiments, they can To carry out simultaneously, it is also possible to first carry out step S25, then carry out step S23 and step S24, it is also possible to carrying out the same of step S25 Shi Jinhang step S23 and step S24.Same, as shown in Figure 12, step S251 and two other step step S252 and Step S253 is parallel.

Carry out step S26, described voltage-penetrance table finds the target voltage that described target penetration rate is corresponding Value, or calculate, according to described voltage-penetrance table, the target voltage values that described target penetration rate is corresponding.

In the present embodiment, when value during described target penetration rate is described voltage-penetrance, by described voltage- Penetrance table finds the target voltage values that described target penetration rate is corresponding；When described target penetration rate fall described voltage- Time between two known penetrances in penetrance table, calculate described target penetration rate pair according to described voltage-penetrance table The target voltage values answered.

When calculating target voltage values corresponding to described target penetration rate according to described voltage-penetrance table, use straight line Interpolation calculation goes out the target voltage values that described target penetration rate is corresponding.

Described linear interpolation is as shown in equation 1 below 1:

V_{K target}And T_{K target}Represent described target voltage and described target penetration rate, V respectively_{K target}It can be red channel targets electricity Pressure, green channel targets voltage or blue channel target voltage, corresponding, T_{K target}Can be red channel targets penetrance, green passage mesh Mark penetrance or blue channel target penetration rate, T₁And T₂For the known penetrance of said two, V₁For corresponding T₁Voltage, V₂For correspondence T₂Voltage.

According to above-mentioned formula 11, can be in the hope of target voltage V_{K target}。

Carry out step S27, according to described target voltage values V_{K target}, the target register value of described set-point is set.

In the present embodiment, target register value can be deposited with in the depositor of display device, so that the ash of display device Rank brightness and colourity all reach specification needed for client.And then make the luminance transition of every display device and color representation reach more Good effect.The quantity of set-point is different according to the difference of display device.Such as to some display device, from minimum gray scale to High gray, can have 30 set-points, or the set-point of other quantity.After whole set-points are all configured, carry out Burning, i.e. completes the correction to display device.

In display device gray-scale intensity that the present embodiment is provided and the bearing calibration of colourity, by step S21, step S22, step S23 and step S24, it is thus achieved that the voltage of display device-penetrance table, by step S21, step S22 and step S25, it is thus achieved that target penetration rate.Then target voltage values is obtained (i.e. according to target penetration rate and described electricity by step S26 Pressure-penetrance table obtains target voltage values), finally carry out step S27 and complete the correction to display device.During whole, by It is each own voltage-penetrance of each display device, therefore, described bearing calibration in the voltage obtained-penetrance table There is with strong points and correction result advantage accurately.Further, step S24 used during obtaining voltage-penetrance table Employing sampling and the mode expanded is carried out, therefore, described bearing calibration can quickly obtain corresponding voltage-penetrance table, And then can rapidly the GTG of display device excessively be corrected to required preset value with chroma control.Finally, described correction side Method ensures that display device GTG excessively all improves with the accuracy that shows of colourity and homogeneity, thus improves the display of display device Quality, and save the corresponding adjustment time.

In the present embodiment, on the one hand, for each different display device, display state when dispatching from the factory it is sampled After set up voltage-penetrance table, therefore, in the present embodiment, the precision of regulation is higher；On the other hand, interpolation method is utilized to be extended Obtain voltage-penetrance table, therefore, the shortest.

This enforcement is compared with prior art, it is not necessary to build library lookup, save before operation find typical sample build storehouse time Between, accelerate raw field flow journey and produce line beat such that it is able to significantly shortening the time of three gamma corrections.And owing to being used in Each display device is adjusted correction by production process targetedly, thus ensures all device brightness and the color produced Preferably, the display quality of display device is excellent in degree performance.

Although present disclosure is as above, but the present invention is not limited to this.Any those skilled in the art, without departing from this In the spirit and scope of invention, all can make various changes or modifications, therefore protection scope of the present invention should be with claim institute Limit in the range of standard.

Claims (19)

1. a display device gray-scale intensity and the bearing calibration of colourity, it is characterised in that including:

Obtain display device redness picture tristimulus values, with (X_Red, Y_Red, Z_Red) represent；

Obtain display device green picture tristimulus values, with (X_Green, Y_Green, Z_Green) represent；

Obtain display device blue picture tristimulus values, with (X_Blue, Y_Blue, Z_Blue) represent；

Obtain display device white picture tristimulus values, with (X_White, Y_White, Z_White) represent；

Obtain display device black picture tristimulus values, with (X_Black, Y_Black, Z_Black) represent；

Use (X_n, Y_n, Z_n) representing display device the n-th grey menu tristimulus values, n is the random natural number between 0 to M, and M is The high gray exponent number of display device, M is the natural number more than 2；

According to CIE1931-xyY standard colorimetric system, Y in the n-th grey menu tristimulus values_nFor brightness；Set up (X_Red, Y_Red, Z_Red)、(X_Green, Y_Green, Z_Green)、(X_Blue, Y_Blue, Z_Blue)、(X_Black, Y_Black, Z_Black) and (X_n, Y_n, Z_nRelation between) Formula；

According to described relation reality penetrance formula；

The tristimulus values of multiple grey menu of sampling, utilize sampling tristimulus values and described penetrance formula obtain sampled voltage- Described sampled voltage-penetrance data are carried out expanding calculating, obtain voltage-penetrance table by penetrance data；

According to target gamma value, target colorimetric, (X_White, Y_White, Z_White)、(X_Black, Y_Black, Z_Black) and described relational expression, Try to achieve the target penetration rate of set-point；

The target voltage values that described target penetration rate is corresponding is found in described voltage-penetrance table, or according to described electricity Pressure-penetrance table calculates the target voltage values that described target penetration rate is corresponding；

According to described target voltage values, the target register value of described set-point is set.

2. display device gray-scale intensity as claimed in claim 1 and the method for chromaticity correction, it is characterised in that described relational expression As shown in below equation one:

$\left[\begin{array}{c}{X}_n\\ Y_n\\ Z_n\end{array}\right]=\left[\begin{array}{ccc}{X}_{\mathrm{Re}d}-X_{Black}& X_{Green}-X_{Black}& X_{Blue}-X_{Black}\\ Y_{\mathrm{Re}d}-Y_{Black}& Y_{Green}-Y_{Black}& Y_{Blue}-Y_{Black}\\ Z_{\mathrm{Re}d}-Z_{Black}& Z_{Green}-Z_{Black}& Z_{Blue}-Z_{Black}\end{array}\right]\left[\begin{array}{c}{r}_n\\ g_n\\ b_n\end{array}\right]+\left[\begin{array}{c}{X}_{Black}\\ Y_{Black}\\ Z_{Black}\end{array}\right]$

(r_n, g_n, b_n) it is the luminance factor group of the n-th GTG, r_n、g_nAnd b_nIt is respectively red channel luminance coefficient, green channel luminance system Number and blue channel luminance factor.

3. display device gray-scale intensity as claimed in claim 2 and the method for chromaticity correction, it is characterised in that

Include according to penetrance formula described in described relation reality:

Utilize described formula one, obtain (r_n, g_n, b_n) expression formula, as shown in below equation two:

$\left[\begin{array}{c}{r}_n\\ g_n\\ b_n\end{array}\right]={\left[\begin{array}{ccc}{X}_{\mathrm{Re}d}-X_{Black}& X_{Green}-X_{Black}& X_{Blue}-X_{Black}\\ Y_{\mathrm{Re}d}-Y_{Black}& Y_{Green}-Y_{Black}& Y_{Blue}-Y_{Black}\\ Z_{\mathrm{Re}d}-Z_{Black}& Z_{Green}-Z_{Black}& Z_{Blue}-Z_{Black}\end{array}\right]}^{-1}\×\left(\left[\begin{array}{c}{X}_n\\ Y_n\\ Z_n\end{array}\right]-\left[\begin{array}{c}{X}_{Black}\\ Y_{Black}\\ Z_{Black}\end{array}\right]\right)$

The penetrance of red channel is expressed as T_Rn, the penetrance of green channel is expressed as T_Gn, the penetrance of blue channel is expressed as T_Bn, obtain described penetrance formula as shown in below equation three:

$\left\{\begin{array}{c}{T}_{Rn}=\frac{r_n}{r_{White}}\\ T_{Gn}=\frac{g_n}{g_{White}}\\ T_{Bn}=\frac{b_n}{b_{White}}\end{array}\right.$

(r_White, g_White, b_White) by described formula two substitutes into (X_White, Y_White, Z_White) obtain.

4. display device gray-scale intensity as claimed in claim 3 and the method for chromaticity correction, it is characterised in that multiple ash of sampling The tristimulus values of rank picture includes: described display device is applied K group gray scale voltage, obtains the K group three of corresponding K grey menu Stimulus value；Sampling tristimulus values and described penetrance formula is utilized to obtain sampled voltage-penetrance data and include: to wear according to described Rate formula, K group gray scale voltage and K group tristimulus values thoroughly, obtains the K group voltage-penetrance data of corresponding K grey menu.

5. display device gray-scale intensity as claimed in claim 4 and the method for chromaticity correction, it is characterised in that wear according to described Rate formula, described K group gray scale voltage and described K group tristimulus values thoroughly, obtains described K group voltage-penetrance data and includes:

Described K group tristimulus values is substituted in described formula two and described formula three respectively, obtains K group tristimulus values-penetrate Rate data；

According to described K group tristimulus values-penetrance data, and described K group gray scale voltage and described K group tristimulus values are one by one Corresponding relation, obtains described K group voltage-penetrance data.

6. display device gray-scale intensity as claimed in claim 5 and the method for chromaticity correction, it is characterised in that the number of described K Value scope is 10～20.

7. display device gray-scale intensity as claimed in claim 6 and the method for chromaticity correction, it is characterised in that to described K group Voltage-penetrance data carry out expanding and calculate, and obtain described voltage-penetrance table and include: use interpolation method to described voltage-wear Rate data carry out expanding calculating thoroughly.

8. display device gray-scale intensity as claimed in claim 7 and the method for chromaticity correction, it is characterised in that described interpolation method For cubic spline interpolation, spline of quartic interpolation method or Fifth system method；

Wherein, the computing formula of described cubic spline interpolation is as shown in below equation four:

$T=\frac{{(V_k-V)}^3}{6h_k}{M}_{k-1}+\frac{{(V-V_{k-1})}^3}{6h_k}{M}_k+(T_{k-1}-\frac{M_{k-1}{h}_k^2}{6})\frac{V_k-V}{h_k}+(T_k-\frac{M_k{h}_k^2}{6})\frac{V-V_{k-1}}{h_k}$

In described formula four, (V_k-1, T_k-1) and (V_k, T_k) it is adjacent two to described voltage-penetrance data, (V, T) is for falling (V_k-1, T_k-1) and (V_k, T_kVoltage between)-penetrance data, T is T_Rn, T_GnOr T_BnAny one；

The minimum voltage of described voltage-penetrance data is V_Min, maximum voltage is V_Max；According to described formula four, comprised The voltage of K-1 section-penetrance calculating formula, by V from V_MinStart with (V_Max-V_Min)/m is that step value is gradually increased to V_Max, obtain m The individual V-value being stepped up, substitutes into described calculating formula one by one by described m V-value, obtains m T value, and whole V-value and T value are i.e. constituted Described voltage-penetrance table；

In described formula four, h_kComputing formula as shown in below equation five:

h_k=V_k-V_k-1

In described formula four, M_kComputing formula as shown in below equation six:

In described formula six, μ_kAnd λ_kComputing formula as shown in below equation seven:

$\left\{\begin{array}{c}{\mathrm{\μ}}_k=\frac{h_k}{h_k+h_{k+1}},{\mathrm{\λ}}_k=\frac{h_{k+1}}{h_k+h_{k+1}}\\ d_k=\frac{6}{h_k+h_{k+1}}\left(\frac{T_{k+1}-T_k}{h_{k+1}}-\frac{T_k-T_{k-1}}{h_k}\right)\end{array}\right.,k=1,2,...,K-2.$

9. display device gray-scale intensity as claimed in claim 8 and the bearing calibration of colourity, it is characterised in that according to described mesh Mark gamma value, target colorimetric, (X_White, Y_White, Z_White)、(X_Black, Y_Black, Z_Black) and described relational expression, try to achieve described in set Put described target penetration rate a little, including:

(x, y) represents described target colorimetric, and (x is y) known in employing；

According to CIE1931-xyY standard colorimetric system, (x, y) with (X_n, Y_n, Z_n) meet as shown in below equation eight:

$x=\frac{X_n}{X_n+Y_n+Z_n}$

$y=\frac{Y_n}{X_n+Y_n+Z_n}$

Adjustment obtains as shown in below equation nine:

$\left\{\begin{array}{c}{X}_n=\frac{x}{y}\×Y_n\\ Z_n=\frac{(1-x-y)}{y}\×Y_n\end{array}\right.$

By r_WhiteJointly substitute in described formula two with described formula nine, obtain Y_Max1、g_Max1And b_Max1；

By g_WhiteJointly substitute in described formula two with described formula nine, obtain Y_Max2、r_Max2And b_Max2；

By b_WhiteJointly substitute in described formula two with described formula nine, obtain Y_Max3、r_Max3And g_Max3；

Taking in above-mentioned three groups of solutions, meeting the one group of solution required is maximum brightness optimal solution, and the Y in described maximum brightness optimal solution makees For the highest goal brightness that maximum gray is corresponding, it is expressed as Y_Max；

By r_BlackJointly substitute in described formula two with described formula nine, obtain Y_Min1、g_Min1And b_Min1；

By g_BlackJointly substitute in described formula two with described formula nine, obtain Y_Min2、r_Min2And b_Min2；

By b_BlackJointly substitute in described formula two with described formula nine, obtain Y_Min3、r_Min3And g_Min3；

r_Black、g_BlackAnd b_BlackBy described formula two substitutes into X_Black、Y_Black、Z_BlackObtain；

Taking in above-mentioned three groups of solutions, meeting the one group of solution required is minimum brightness optimal solution, and the Y in described minimum brightness optimal solution makees For the minimum object brightness that minimum gray is corresponding, it is expressed as Y_Min；

Y_nWith Y_MaxAnd Y_MinBetween relation as shown in below equation ten:

$Y_n={\left(\frac{n}{M}\right)}^{Gamma}\×(Y_{Max}-Y_{Min})+Y_{Min}$

Wherein, Gamma is described target gamma value；

Y is solved according to described formula ten_nAfter, by Y_nSubstitute into described formula nine and solve X_nAnd Z_n；

(the X that will solve_n, Y_n, Z_n) substitute into described formula three, obtain described target penetration rate.

10. display device gray-scale intensity as claimed in claim 9 and the bearing calibration of colourity, it is characterised in that

When value during described target penetration rate is described voltage-penetrance table, by searching in described voltage-penetrance table To the target voltage values that described target penetration rate is corresponding；When described target penetration rate falls two in described voltage-penetrance table Time between individual known penetrance, calculate, according to described voltage-penetrance table, the target voltage values that described target penetration rate is corresponding；

When calculating target voltage values corresponding to described target penetration rate according to described voltage-penetrance table, use linear interpolation Method calculates the target voltage values that described target penetration rate is corresponding；

Described linear interpolation is as shown in below equation 11:

V_{K target}And T_{K target}Represent described target voltage and described target penetration rate, V respectively_{K target}Can be red channel targets voltage, green Channel targets voltage or blue channel target voltage, corresponding, T_{K target}Can be that red channel targets penetrance, green channel targets penetrate Rate or blue channel target penetration rate, T₁And T₂For the known penetrance of said two, V₁For corresponding T₁Voltage, V₂For corresponding T₂Electricity Pressure.

11. 1 kinds of display device gray-scale intensity and the bearing calibration of colourity, it is characterised in that including:

Obtain display device redness picture tristimulus values, with (X_Red, Y_Red, Z_Red) represent；

Obtain display device green picture tristimulus values, with (X_Green, Y_Green, Z_Green) represent；

Obtain display device blue picture tristimulus values, with (X_Blue, Y_Blue, Z_Blue) represent；

Obtain display device white picture tristimulus values, with (X_White, Y_White, Z_White) represent；

Use (X_n, Y_n, Z_n) representing display device the n-th grey menu tristimulus values, n is the random natural number between 0 to M, and M is The high gray exponent number of display device, M is the natural number more than 2；

According to CIE1931-xyY standard colorimetric system, Y in the n-th grey menu tristimulus values_nFor brightness；

Set up (X_Red, Y_Red, Z_Red)、(X_Green, Y_Green, Z_Green)、(X_Blue, Y_Blue, Z_Blue) and (X_n, Y_n, Z_nRelation between) Formula；

According to described relation reality penetrance formula；

The tristimulus values of multiple grey menu of sampling, utilize sampling tristimulus values and described penetrance formula obtain sampled voltage- Described sampled voltage-penetrance data are carried out expanding calculating, obtain voltage-penetrance table by penetrance data；

According to target gamma value, target colorimetric, (X_White, Y_White, Z_White) and described relational expression, the target trying to achieve set-point is worn Rate thoroughly；

The target voltage values that described target penetration rate is corresponding is found in described voltage-penetrance table, or according to described electricity Pressure-penetrance table calculates the target voltage values that described target penetration rate is corresponding；

According to described target voltage values, the target register value of described set-point is set.

12. display device gray-scale intensity as claimed in claim 11 and the bearing calibrations of colourity, it is characterised in that described relation Formula is as shown in equation 1 below:

$\left[\begin{array}{c}{X}_n\\ Y_n\\ Z_n\end{array}\right]=\left[\begin{array}{ccc}{X}_{\mathrm{Re}d}& X_{Green}& X_{Blue}\\ Y_{\mathrm{Re}d}& Y_{Green}& Y_{Blue}\\ Z_{\mathrm{Re}d}& Z_{Green}& Z_{Blue}\end{array}\right]\left[\begin{array}{c}{r}_n\\ g_n\\ b_n\end{array}\right]$

(r_n, g_n, b_n) it is the luminance factor group of the n-th GTG, r_n、g_nAnd b_nIt is respectively red channel luminance coefficient, green channel luminance system Number and blue channel luminance factor.

13. display device gray-scale intensity as claimed in claim 12 and the bearing calibrations of colourity, it is characterised in that according to described Described in relation reality, penetrance formula includes:

Utilize described formula 1, obtain (r_n, g_n, b_n) expression formula, as shown in equation 2 helow:

$\left[\begin{array}{c}{r}_n\\ g_n\\ b_n\end{array}\right]={\left[\begin{array}{ccc}{X}_{\mathrm{Re}d}& X_{Green}& X_{Blue}\\ Y_{\mathrm{Re}d}& Y_{Green}& Y_{Blue}\\ Z_{\mathrm{Re}d}& Z_{Green}& Z_{Blue}\end{array}\right]}^{-1}\×\left[\begin{array}{c}{X}_n\\ Y_n\\ Z_n\end{array}\right]$

The penetrance of red channel is expressed as T_Rn, the penetrance of green channel is expressed as T_Gn, the penetrance of blue channel is expressed as T_Bn, obtain described penetrance formula as shown in equation 3 below:

$\left\{\begin{array}{c}{T}_{Rn}=\frac{r_n}{r_{White}}\\ T_{Gn}=\frac{g_n}{g_{White}}\\ T_{Bn}=\frac{b_n}{b_{White}}\end{array}\right.$

(r_White, g_White, b_White) by described formula 2 substitutes into (X_White, Y_White, Z_White) obtain.

14. display device gray-scale intensity as claimed in claim 13 and the bearing calibrations of colourity, it is characterised in that sample multiple The tristimulus values of grey menu includes: described display device is applied K group gray scale voltage, obtains the K group of corresponding K grey menu Tristimulus values；Sampling tristimulus values and described penetrance formula is utilized to obtain sampled voltage-penetrance data and include: according to described Penetrance formula, K group gray scale voltage and K group tristimulus values, obtain the K group voltage-penetrance data of corresponding K grey menu.

15. display device gray-scale intensity as claimed in claim 14 and the bearing calibrations of colourity, it is characterised in that according to described Penetrance formula, K group gray scale voltage and K group tristimulus values, obtain described K group voltage-penetrance data and include:

Described K group tristimulus values is substituted in described formula 3 respectively, obtains K group tristimulus values-penetrance data；

According to described K group tristimulus values-penetrance data, and described K group gray scale voltage and described K group tristimulus values are one by one Corresponding relation, obtains described K group voltage-penetrance data.

16. display device gray-scale intensity as claimed in claim 15 and the bearing calibrations of colourity, it is characterised in that to described K Group voltage-penetrance data carry out expanding calculating, obtain described voltage-penetrance table and include:

Use interpolation method described voltage-penetrance data are carried out expand calculate, described interpolation method be cubic spline interpolation, four Secondary spline method or Fifth system method；

Wherein, the computing formula of described cubic spline interpolation is as shown in equation 4 below:

$T=\frac{{(V_k-V)}^3}{6h_k}{M}_{k-1}+\frac{{(V-V_{k-1})}^3}{6h_k}{M}_k+(T_{k-1}-\frac{M_{k-1}{h}_k^2}{6})\frac{V_k-V}{h_k}+(T_k-\frac{M_k{h}_k^2}{6})\frac{V-V_{k-1}}{h_k}$

In described formula 4, (V_k-1, T_k-1) and (V_k, T_k) it is adjacent two to described voltage-penetrance data, (V, T) is for falling (V_k-1, T_k-1) and (V_k, T_kVoltage between)-penetrance data, T is T_Rn, T_GnOr T_BnAny one；

The minimum voltage of described voltage-penetrance data is V_Min, maximum voltage is V_Max；According to described formula 4, obtain comprising K- The voltage of 1 section-penetrance calculating formula, by V from V_MinStart with (V_Max-V_Min)/m is that step value is gradually increased to V_Max, obtain m The V-value being stepped up, substitutes into described calculating formula one by one by described m V-value, obtains m T value, and whole V-value and T value i.e. constitute institute State voltage-penetrance table；

In described formula 4, h_kComputing formula as shown in equation 5 below:

h_k=V_k-V_k-1

In described formula 4, M_kComputing formula as shown in equation 6 below:

In described formula 6, μ_kAnd λ_kComputing formula as shown in equation 7 below:

$\left\{\begin{array}{c}{\mathrm{\μ}}_k=\frac{h_k}{h_k+h_{k+1}},{\mathrm{\λ}}_k=\frac{h_{k+1}}{h_k+h_{k+1}}\\ d_k=\frac{6}{h_k+h_{k+1}}\left(\frac{T_{k+1}-T_k}{h_{k+1}}-\frac{T_k-T_{k-1}}{h_k}\right)\end{array}\right.,k=1,2,...,K-2.$

17. display device gray-scale intensity as claimed in claim 16 and the bearing calibrations of colourity, it is characterised in that according to described Target gamma value, target colorimetric, (X_White, Y_White, Z_White) and described relational expression, the described target trying to achieve described set-point is worn Rate thoroughly, including:

(x, y) represents described target colorimetric, and (x is y) known in employing；

According to CIE1931-xyY standard colorimetric system, (x, y) with described (X_n, Y_n, Z_n) meet as shown in equation 8 below:

$\left\{\begin{array}{c}x=\frac{X_n}{X_n+Y_n+Z_n}\\ y=\frac{Y}{X_n+Y_n+Z_n}\end{array}\right.$

Adjustment obtains as shown in equation 9 below:

$\left\{\begin{array}{c}{X}_n=\frac{x}{y}\×Y_n\\ Z_n=\frac{(1-x-y)}{y}\×Y_n\end{array}\right.$

By r_WhiteJointly substitute in described formula 2 with described formula 9, obtain Y_Max1、g_Max1And b_Max1；

By g_WhiteJointly substitute in described formula 2 with described formula 9, obtain Y_Max2、r_Max2And b_Max2；

By b_WhiteJointly substitute in described formula 2 with described formula 9, obtain Y_Max3、r_Max3And g_Max3；

Taking in above-mentioned three groups of solutions, meeting the one group of solution required is maximum brightness optimal solution, and the Y in described maximum brightness optimal solution makees For the highest goal brightness that maximum gray is corresponding, it is expressed as Y_Max；

Y_nWith Y_MaxRelation as shown in equation 10 below:

$Y_n={\left(\frac{n}{M}\right)}^{Gamma}\×Y_{Max}$

Wherein, Gamma is described target gamma value；

Y is solved according to described formula 10_nAfter, by Y_nSubstitute into described formula 9 and solve X_nAnd Z_n；

(the X that will solve_n, Y_n, Z_n) substitute into described formula 3, obtain described target penetration rate.

18. display device gray-scale intensity as claimed in claim 17 and the bearing calibrations of colourity, it is characterised in that when described mesh When mark penetrance is the value in described voltage-penetrance table, wear by finding described target in described voltage-penetrance table The target voltage values that rate is corresponding thoroughly；When described target penetration rate falls two known penetrances in described voltage-penetrance table Between time, calculate, according to described voltage-penetrance table, the target voltage values that described target penetration rate is corresponding；

When calculating target voltage values corresponding to described target penetration rate according to described voltage-penetrance table, use linear interpolation Method calculates the target voltage values that described target penetration rate is corresponding；

Described linear interpolation is as shown in equation 1 below 1:

V_{K target}And T_{K target}Represent described target voltage and described target penetration rate, V respectively_{K target}Can be red channel targets voltage, green Channel targets voltage or blue channel target voltage, corresponding, T_{K target}Can be that red channel targets penetrance, green channel targets penetrate Rate or blue channel target penetration rate, T1 and T₂For the known penetrance of said two, V₁For corresponding T₁Voltage, V₂For corresponding T₂Electricity Pressure.

19. display device gray-scale intensity as described in claim 11-18 any one and the bearing calibration of colourity, its feature exists In, described display device is OLED display.