CN103366710A - Method for improving four color white balance adjustment and calibration precision through white color luminance parameters - Google Patents

Abstract

The invention discloses a method for improving four color white balance adjustment and calibration precision through white color luminance parameters. The method for improving four color white balance adjustment and calibration precision through white color luminance parameters is characterized in that a gray scale white balance yield value is calculated by importing white color luminance parameters of a display device panel according to display device panel original three primary colors and white color optical properties, and therefore gray scale white balance adjustment and calibration precision can be improved. A first white color image, an entirely red color image, an entirely green color image and an entirely blue color image that have a set gray scale value are orderly displayed on the panel; stimulation values of the images are measured, stimulation values which are obtained when an entirely black image is displayed on the panel are subtracted, and therefore corresponding corrected stimulation values can be acquired; a white color luminance curve value of the display device panel is measured; a first color ratio for mixing the red color, green color and blue color image corrected stimulation values into the first white color image and a second color ratio for mixing the red color, green color and blue color image corrected stimulation values into an ideal white color image are calculated according a color mixing law; red color, green color and blue color adjustment and correction yield values are calculated through utilization of the color mixing ratios and the white color luminance curve value and then are set in a display device.

Description

Improve the method for the precision of four look white balance adjustment with the white brightness parameter

Technical field

The present invention is a kind of method that improves the precision of four look white balance adjustment with the white brightness parameter, specifically a kind of white brightness parameter with display pannel imports according to the optical characteristics of the original three primary colors of display pannel and white and calculates the gray level white balance yield value to improve the method for its adjusting gray scale white balance precision, espespecially by the white brightness curve values on the calculation display panel, and the ratio of red, green, blue three looks during according to display pannel mixture of white image, calculate the method for the adjustment yield value of red, green, blue three looks.

Background technology

Flourish along with the progress of science and technology and electronic industry, the kind of display and usefulness are just constantly towards better, abundanter aspect strides forward, at present, except traditional cathode-ray tube display, liquid crystal display, the technology of the new displays such as plasma display is also gradually driven maturation, make more frivolous that display can be designed, size also can upwards promote simultaneously, after the panel size of display is amplified, how to keep the display quality of image, namely become an important problem, wherein, the Findings of display is again with saturation degree (Saturation), colourity (Chromatic value), and three factors such as brightness (Luminance) are the most key.

Generally speaking, the image display technology is that the viewing area on the panel is divided into many pixels (pixel) now, each pixel comprises again red, green, the trichromatic unit pixel of the light such as indigo plant, according to the color mixture law of Jim Glassman (Grassmann ' s law ofcolor mixture), the mixed light that multiple tracks monochromatic light is mixed into, its brightness is equal to the summation of respectively this monochromatic brightness, therefore, by controlling the brightness of these unit pixel, colourity and light and shade, can construction go out the color that single pixel will show, and and then demonstrate image at display.Yet, because the factors such as the material of the panel of display and manufacturing process, after each display group installs into, color representation each other is difference to some extent still, so be to make the display effect of the display of each have certain correctness and consistance, before display dispatched from the factory, the dealer still must proofread and correct each display, to guarantee the quality of display.

The correction program of aforementioned display is a kind of gray level white balance adjustment (Grayscale white balance), bearing calibration is the panel demonstration one white image at display, and adjust respectively red, green, the yield value of Lan Sanse (Gain), make this white image energy meet colourity and the brightness of an ideal white image of dealer's expection, meaning namely, white image is adjusted in the scope of a colour temperature (Color temperature) and a colo(u)r bias (Color derivation), yet, because present gray level white balance adjustment all is manually to be adjusted into the master, therefore the correction program of this manual operation is not only time-consuming, and also accurate not, for this reason, the inventor is once in the TaiWan, China patent (patent No. is I348150) of application on November 17th, 2,006 one " gain decision method of the gray level white balance of display device and device ", phase can make its panel parameter of display Auto-Sensing, and finish correction program, the inventor is in follow-up R﹠D process, find because the panel of each display has different GTG brightness curve (Gamma Curve), and it is when showing the blank screen picture (all black image), still have certain light leakage phenomena, therefore the result after the adjustment still disagrees with expection, therefore, the yield value that method was calculated with this patent is still perfect not, the colors of image that can cause each panel to present equally, produce different error amounts from the performance of desired color temperature, affected user's the quality of watching.

Therefore, how to improve the problems of existing display pannel adjustment, to avoid the required time of expending of artificial adjustment and human cost, and the existing solution of improvement is not considered the problem of brightness curve value and light leak degree, to reduce the error of display pannel adjustment, make the display through adjustment all can present best color representation, namely become the present invention and desire most ardently the major issue of solution at this.

Summary of the invention

Because in the past when producing display, the dealer must carry out via manual operation the adjustment of gray level white balance, cause the adjustment problem such as tediously long and accurate not consuming time, the inventor is by feat of for many years practical experience, after through repeatedly research and test, finally design a kind of white brightness parameter importing with display pannel of the present invention and calculate the gray level white balance yield value to improve the method for its adjusting gray scale white balance precision according to the optical characteristics of the original three primary colors of display pannel and white, the phase can be improved disappearance in the past.

A purpose of the present invention, provide a kind of white brightness parameter importing with display pannel and calculate the gray level white balance yield value to improve the method for its adjusting gray scale white balance precision according to the optical characteristics of the original three primary colors of display pannel and white, the method is applied on the display, the color of an image that presents on one panel of this display is corresponding to one group of values, this panel utilizes this group values to blend together color, make this color can correspond to a GTG value, the method comprises the following steps: to show respectively the first white image with same settings GTG value on a panel of this display, the whole red image, complete green image and complete blue image, and detect brightness and the colourity of these images, measure values to obtain respectively an original white, the one red values of measuring, one complete green values and the complete blue values of measuring measured; Calculate a white brightness curve values of this panel; Calculate the ideal white values of an ideal white image; Measure values according to these, calculate one first color mixture ratio; Measure values and ideal white values according to these, calculate one second color mixture ratio; According to this first color mixture ratio and this second color mixture ratio, calculate an initial red gain value, an initial green yield value and an initial blue gain value; At last, this white brightness curve values is calculated with this initial red gain value, initial green yield value and initial blue gain value respectively, to obtain respectively a final red gain value, a final green gain value and a final blue gain value.So, to this display, this panel of according to this adjustment of this display is to present desirable color representation in these gain value settings.

Another object of the present invention, the method are calculated these color ratios through the following steps: show that at this panel the GTG value is an all black image of zero, measure values to measure an all black; Should be original white measure values, redly measure values, entirely greenly measure values and the complete blue values of measuring is deducted respectively this all black and measured values, to obtain respectively corresponding correction values, and this ideal white values is deducted this all black measure values, proofread and correct values to obtain an ideal white; The ratio that the correction values of calculating red, blue, green three looks is mixed into this original white when proofreading and correct values is this first color mixture ratio; The ratio that the correction values of calculating red, blue, green three looks is mixed into this ideal white when proofreading and correct values is this second color mixture ratio.

Another purpose of the present invention, the method can show at this panel the white image of high gray, and by this first white image of detecting, the white image of high gray and brightness and the GTG value thereof of this all black image, calculate the white brightness curve values of this panel.

White brightness parameter with display pannel provided by the invention imports according to the optical characteristics of the original three primary colors of display pannel and white calculates the gray level white balance yield value to improve the method for its adjusting gray scale white balance precision, can improve the problems of existing display pannel adjustment, to avoid the required time of expending of artificial adjustment and human cost, and the existing solution of improvement is not considered the problem of brightness curve value and light leak degree, to reduce the error of display pannel adjustment, make the display through adjustment all can present best color representation.

Description of drawings

Fig. 1 is the hardware structure synoptic diagram that method of the present invention is used;

Fig. 2 A is the first preferred embodiment synoptic diagram of method of the present invention; And

Fig. 2 B is the first preferred embodiment synoptic diagram of method of the present invention.

Drawing reference numeral:

Display ... 1

Control module ... 11

Panel ... 13

Image process unit ... 15

Storage element ... 17

Measurement mechanism ... 2

Gain regulator ... 3

The first receiver module ... 31

The second receiver module ... 32

The 3rd receiver module ... 33

The 4th receiver module ... 34

The 5th receiver module ... 35

The 6th receiver module ... 36

The first computing module ... 41

The second computing module ... 42

The 3rd computing module ... 43

Embodiment

In order further understanding and understanding to be arranged to method of the present invention, technological means and purpose thereof, hereby cooperate accompanying drawing for embodiment, be described in detail as follows:

CIE XYZ colour system (standard colorimetric system) was founded by International Commission on Illumination (CIE) in 1931, it supposes not to be present in natural three kinds of primary colors theoretically, be theoretical three primary colors, in the hope of mixing institute's colored by aforesaid theoretical three primary colors, therefore, CIE XYZ colour system is to adopt mathematical way to define color space, phase can be with chromaticity coordinate and brightness (x, y, Y) convert theoretical three primary colors (X, Y, Z) to according to following formula (1), X wherein, Y and Z refer to red, green, the tristimulus values of primary colors, namely it is to the stimulation energy of human eye:

$(X,Y,Z)=(\frac{x\·Y}{y},Y,\frac{(1-x-y)\·Y}{y})...\left(1\right)$

One group of values that this tristimulus values forms can represent a predetermined color.Inferior looking into, brightness curve (Gamma Curve) refers to the relation curve between different GTGs and brightness, because early stage display all is to use cathode-ray tube (CRT) (Cathode ray tube, be called for short CRT) screen, and it roughly is index rule (power law) for display characteristic between GTG and brightness, shown in following formula (2):

Output brightness (Output Luminance)=(high-high brightness-minimum brightness) X (GTG value/255) ^γ+ minimum brightness ... ... ... ... ... ... ... ... ... ... ... ... (2)

Wherein γ namely represents the brightness curve value.The applicant is with the upper step of the present invention of aforementioned formula collocation, so that one group of yield value of the Red Green Blue of obtaining at last, can comprise the variation of the corresponding brightness curve of each panel, and according to this display be proofreaied and correct, so that it presents best color representation.

The present invention is that a kind of white brightness parameter importing with display pannel is calculated the gray level white balance yield value to improve the method for its adjusting gray scale white balance precision according to the optical characteristics of the original three primary colors of display pannel and white, for making general masses and relevant dealer can promptly understand the overall technology feature of this case, the hardware structure that the present invention can use is simply described hereby, only, the hardware structure of chatting after the present invention is not limited to closes first Chen Ming.See also shown in Figure 1ly, be provided with a control module 11, a panel 13, an image process unit 15 and a storage element 17 in the display 1, wherein this control module 11 is electrically connected mutually with this panel 13, image process unit 15 and this storage element 17 respectively; This image process unit 15 can receive the extraneous redness that transmits, green and the three primary colors signal of video signal such as blue, and to this three primary colors signal of video signal handling procedure such as decode, to be passed to this control module 11; Store one group corresponding to the yield value of red, green, blue three looks in this storage element 17; This control module 11 is after receiving the three primary colors signal of video signal that this image process unit 15 transmits, can be according to this group yield value in this storage element 17, this three primary colors signal of video signal is carried out the intensity adjustment, and show the image of a correspondence at this panel 13, and the color of this image corresponds to a GTG value.

In the present embodiment, this display 1 Shang Yuyi measurement mechanism 2 and a gain regulator 3 are connected, this measurement mechanism 2 can be detected colourity, brightness or the GTG value of the image of these panel 13 demonstrations, and one group of values corresponding to measurement, the values that has aforementioned red, green, blue three looks in this group values represents that the color that this panel 13 demonstrates is blended together by this group values.

See also again shown in Figure 1, the first white image, a whole red image, a complete green image, a complete blue image that this display 1 can make this panel 13 show respectively to have mutually same setting GTG value, and a GTG value is zero black image, and by a measurement mechanism 2, measure brightness and the colourity of these images, and measurement result is passed in this gain regulator 3; In the present embodiment, be provided with one first receiver module 31, one second receiver module 32, one the 3rd receiver module 33, one the 4th receiver module 34, one the 5th receiver module 35 and one the 6th receiver module 36 in this gain regulator 3, wherein this first receiver module 31 can receive brightness and the colourity of this first white image, measures values W to obtain an original white _p(X _Wp, Y _Wp, Z _Wp); This second receiver module 32 can receive brightness and the colourity of this whole red image, to obtain a red values R that measures _p(X _r, Y _r, Z _r); The 3rd receiver module 33 can receive brightness and the colourity of this complete green image, to obtain a green values G that measures _p(X _g, Y _g, Z _g); The 4th receiver module 34 can receive brightness and the colourity of this complete blue image, to obtain a blue values B that measures _p(X _b, Y _b, Z _b); The 5th receiver module 35 can receive brightness and the colourity of this all black image, measures values W to obtain a black ₀(X _W0, Y _W0, Z _W0); After this gain regulator 3 is obtained these measurement valuess, the dealer can input to colourity and the brightness of the ideal white image under the target colour temperature in one the 6th receiver module 36, to calculate an ideal white values: suppose that the chromatic value of ideal white image of this target colour temperature and brightness value are as W _i(x _Wi, y _Wi, Y _Wi), according to CIE XYZ colour system, the 6th receiver module 36 can be converted into XYZ tristimulus values, wherein Y according to aforementioned formula (1) _WiBe unknown number, shown in following formula (3):

$W_i(X_{\mathrm{wi}},Y_{\mathrm{wi}},Z_{\mathrm{wi}})=(\frac{x_{\mathrm{wi}}\·Y_{\mathrm{wi}}}{y_{\mathrm{wi}}},Y_{\mathrm{wi}},\frac{(1-x_{\mathrm{wi}}-y_{\mathrm{wi}})\·Y_{\mathrm{wi}}}{y_{\mathrm{wi}}})...\left(3\right)$

So, the 6th receiver module 36 can be obtained the ideal white values W of the ideal white image of target colour temperature _i(X _Wi, Y _Wi, Z _Wi).This declarant, the ideal white image of aforesaid target colour temperature is to refer to that in theory when an intended target colour temperature (as: 9300K), the chromatic value that the whole white image should have and brightness value close first Chen Ming.

See also again shown in Figure 1, this gain regulator 3 still comprises one first computing module 41, one second computing module 42 and one the 3rd computing module 43, a whole white image that detects these panel 13 demonstrations at this measurement mechanism 2 (can be this first white image, or the white image with arbitrary GTG value) after the brightness and GTG value, this first computing module 41 can be according to this brightness and GTG value, and utilize aforementioned formula (2), calculate the brightness curve of this panel 13 and a corresponding white brightness curve values γ _W

See also again shown in Figure 1ly, obtain this original white at this gain regulator 3 and measure values W _p(X _Wp, Y _Wp, Z _Wp), the red values R that measures _p(X _r, Y _r, Z _r), the green values G that measures _p(X _g, Y _g, Z _g), the blue values B that measures _p(X _b, Y _b, Z _b) and this ideal white values W _i(X _Wi, Y _Wi, Z _Wi) after, this second computing module 42 can be deducted above-mentioned these valuess respectively this black and measure values W ₀(X _W0, Y _W0, Z _W0), proofread and correct values W ' to obtain respectively an original white _p(X ' _Wp, Y ' _Wp, Z ' _Wp), red-correction values R ' _p(X ' _r, Y ' _r, Z ' _r), green correction values G ' _p(X ' _g, Y ' _g, Z ' _g), blue-correction values B ' _p(X ' _b, Y ' _b, Z ' _b) and ideal white correction values W ' _i(X ' _Wi, Y ' _Wi, Z ' _Wi), shown in following formula (4)～(8):

W′ _p(X′ _wp，Y′ _wp，Z′ _wp)＝W _p(X _wp，Y _wp，Z _wp)-W ₀(X _w0，Y _w0，Z _w0)......(4)

R′ _p(X′ _r，Y′ _r，Z′ _r)＝R _p(X _r，Y _r，Z _r)-W ₀(X _w0，Y _w0，Z _w0)...............(5)

G′ _p(X′ _g，Y′ _g，Z′ _g)＝G _p(X _g，Y _g，Z _g)-W ₀(X _w0，Y _w0，Z _w0)............(6)

B′ _p(X′ _b，Y′ _b，Z′ _b)＝B _p(X _b，Y _b，Z _b)-W ₀(X _w0，Y _w0，Z _w0)...............(7)

W′ _wi(X′ _wi，Y′ _wi，Z′ _wi)＝W _i(X _wi，Y _wi，Z _wi)-W ₀(X _w0，Y _w0，Z _w0).........(8)

Again, this second computing module 42 can be according to the color mixture law, to aforementioned formula (4)～(8) respectively organize values, process, for example, suppose should original white correction values ' _pA unit brightness be by m _RpThe red-correction values R ' of unit _pBrightness, m _GpThe green correction values G ' of unit _pBrightness and m _BpThe blue-correction values B ' of unit _pBrightness mixes; And should proofread and correct values W ' by the ideal look _iA unit brightness be by m _RiThe red-correction values R ' of unit _pBrightness, m _GiThe green correction values G ' of unit _pBrightness and m _BiThe blue-correction values B ' of unit _pBrightness mixes, such as following formula (9), (10):

W′ _p＝m _rpR′ _p+m _gpG′ _p+m _bpB′ _p..........................................(9)

W′ _i＝m _riR′ _p+m _giG′ _p+m _biB′ _p..........................................(10)

Then this second computing module 42 can be brought formula (9), (10) into aforementioned formula (4)～(8), in the hope of one first color mixture ratio (m _Rp, m _Gp, m _Bp) and one second color mixture ratio (m _Ri, m _Gi, m _Bi) as follows:

$\left[\begin{array}{c}{m}_{\mathrm{rp}}\\ m_{\mathrm{gp}}\\ m_{\mathrm{bp}}\end{array}\right]={\left[\begin{array}{ccc}{X}_r^{\′}& X_g^{\′}& X_b^{\′}\\ Y_r^{\′}& Y_g^{\′}& Y_b^{\′}\\ Z_r^{\′}& Z_g^{\′}& Z_b^{\′}\end{array}\right]}^{-1}\·\left[\begin{array}{c}{X}_{\mathrm{wp}}^{\′}\\ Y_{\mathrm{wp}}^{\′}\\ Z_{\mathrm{wp}}^{\′}\end{array}\right]...\left(11\right)$

$\left[\begin{array}{c}{m}_{\mathrm{ri}}\\ m_{\mathrm{gi}}\\ m_{\mathrm{bi}}\end{array}\right]={\left[\begin{array}{ccc}{X}_r^{\′}& X_g^{\′}& X_b^{\′}\\ Y_r^{\′}& Y_g^{\′}& Y_b^{\′}\\ Z_r^{\′}& Z_g^{\′}& Z_b^{\′}\end{array}\right]}^{-1}\·(\left[\begin{array}{c}\frac{x_{\mathrm{wi}}}{y_{\mathrm{wi}}}\\ 1\\ \frac{(1-x_{\mathrm{wi}}-y_{\mathrm{wi}})}{y_{\mathrm{wi}}}\end{array}\right]\·Y_{\mathrm{wi}}-\left[\begin{array}{c}{X}_{w0}\\ Y_{w0}\\ Z_{w0}\end{array}\right])...\left(12\right)$

See also shown in Figure 1ly, the 3rd computing module 43 can receive the first color mixture ratio (m that this second computing module 42 calculates again _Rp, m _Gp, m _Bp) and the second color mixture ratio (m _Ri, m _Gi, m _Bi), and with this first color mixture ratio (m _Rp, m _Gp, m _Bp) be denominator, this second color mixture ratio (m _Ri, m _Gi, m _Bi) be molecule, calculate (c _r, c _g, c _b), and it is regularly turned to one group of initial adjustment yield value (g that is made of red initial yield value, blue initial yield value and green initial yield value _r, g _g, g _b), i.e. formula (13) (14):

$(c_r,c_g,c_b)=(\frac{m_{\mathrm{ri}}}{m_{\mathrm{rp}}},\frac{m_{\mathrm{gi}}}{m_{\mathrm{gp}}},\frac{m_{\mathrm{bi}}}{m_{\mathrm{bp}}})...\left(13\right)$

$(g_r,g_g,g_b)=(\frac{c_r}{\mathrm{Max}(c_r,c_g,c_b)},\frac{c_g}{\mathrm{Max}(c_r,c_g,c_b)},\frac{c_b}{\mathrm{Max}(c_r,c_g,c_b)})...\left(14\right)$

The 3rd computing module 43 can receive the white brightness curve values γ of this first computing module 41 _W, and by this white brightness curve values γ _W, with these initial red, green, blue yield value (g _r, g _g, g _b) be converted into one group of final red, green, blue yield value (G _r, G _g, G _b), in order to the processing of digit circuit, as shown in the formula (15):

$(G_r,G_g,G_b)=(128\×{\left(g_r\right)}^{1/{\mathrm{\γ}}_W},128\×{\left(g_g\right)}^{1/{\mathrm{\γ}}_W},128\×{\left(g_b\right)}^{1/{\mathrm{\γ}}_W})...\left(15\right)$

So, this gain regulator 3 just can be with these final red, green, blue look yield value (G _r, G _g, G _b) be sent in the storage element 17 of this display 1 and store, so that this display 1 can be according to this final red gain value G _r, final green gain value G _gAnd final blue gain value G _b, this panel 13 of adjustment makes this panel 13 can demonstrate the color representation of expection.

In order those skilled in the art can be known understand ins and outs of the present invention, hereby existing take Fig. 1, Fig. 2 A and Fig. 2 B as example, it is as follows to describe the detailed process of the first preferred embodiment of the present invention on applying in detail:

Step 101, at the panel demonstration one first white image of this display, this first white image has one and sets the GTG value; And colourity and the brightness of measuring this first white image, measure values W to obtain one group of corresponding original white _p(X _Wp, Y _Wp, Z _Wp)=(65.160,69.479,72.639);

Step 102 shows the whole red image with this setting GTG value at this panel, and colourity and the brightness of measuring this whole red image, to obtain one group of corresponding red values R that measures _p(X _r, Y _r, Z _r)=(30.135,15.772,1.362);

Step 103 shows the complete green image with this setting GTG value at this panel, and colourity and the brightness of measuring this complete green image, to obtain one group of corresponding green values G that measures _p(X _g, Y _g, Z _g)=(22.791,46.143,10.767);

Step 104 shows the complete blue image with this setting GTG value at this panel, and colourity and the brightness of measuring this complete blue image, to obtain one group of corresponding blue values B that measures _p(X _b, Y _b, Z _b)=(10.314,5.439,58.419);

Step 105 shows that at this panel a GTG value is an all black image of zero, and colourity and the brightness of measuring this all black image, measures values W to obtain one group of corresponding black ₀(X _W0, Y _W0, Z _W0)=(0.176,0.189,0.281);

Step 106 shows the white image of high gray at this panel, and according to this first white image, the white image of this high gray and brightness and the GTG value thereof of all black image, calculates a white brightness curve values γ _W=2.45;

Step 107 should be organized original white values, red measurement values, green measurement values and the blue values of measuring measured and deduct respectively this group black measurement values, to obtain respectively an original white correction values W ' _p(X ' _Wp, Y ' _Wp, Z ' _Wp)=(64.983,69.291,72.359), a red-correction values R ' _p(X ' _r, Y ' _r, Z ' _r)=(29.959,15.583,1.081), a green correction values G ' _p(X ' _g, Y ' _g, Z ' _g)=(22.615,45.954,10.486) and a blue-correction values B ' _p(X ' _b, Y ' _b, Z ' _b)=(10.137,5.250,58.139);

Step 108 is according to colourity and the brightness W of an ideal white image _i(0.283,0.298, Y _Wi), converse one group of corresponding ideal white values W _i(X _Wi, Y _Wi, Z _Wi)=(0.9497,1,1.406) Y _Wi, and this ideal white values is deducted this black measure values, proofread and correct values W ' to obtain an ideal white _i(X ' _Wi, Y ' _Wi, Z ' _Wi)=(0.950,1,1.406) Y _Wi-(0.176,0.189,0.281);

Step 109, according to aforementioned formula (4)～(7), (9), and the color mixture law, the first color mixture ratio (first color mixture ratios) when calculating this red-correction values, blue-correction values and green correction values and blending this original white and proofread and correct values:

$\left[\begin{array}{c}64.983\\ 69.291\\ 72.359\end{array}\right]=\left[\begin{array}{ccc}29.959& 22.615& 10.137\\ 15.583& 45.954& 5.250\\ 1.081& 10.486& 58.139\end{array}\right]\·\left[\begin{array}{c}{m}_{\mathrm{rp}}\\ m_{\mathrm{gp}}\\ m_{\mathrm{bp}}\end{array}\right]$

Namely $\left[\begin{array}{c}{m}_{\mathrm{rp}}\\ m_{\mathrm{gp}}\\ m_{\mathrm{bp}}\end{array}\right]=\left[\begin{array}{c}1.03379\\ 1.03867\\ 1.03801\end{array}\right];$

Step 110, according to aforementioned formula (8), (10), according to the color mixture law, the second color mixture ratio (second color mixture ratios) when calculating this red-correction values, blue-correction values and green correction values and blending this ideal white and proofread and correct values:

$\left[\begin{array}{c}0.950\·Y_{\mathrm{wi}}-0.176\\ Y_{\mathrm{wi}}-0.189\\ 1.406\·Y_{\mathrm{wi}}-0.281\end{array}\right]=\left[\begin{array}{ccc}29.959& 22.615& 10.137\\ 15.583& 45.954& 5.250\\ 1.081& 10.486& 58.139\end{array}\right]\·\left[\begin{array}{c}{m}_{\mathrm{ri}}\\ m_{\mathrm{gi}}\\ m_{\mathrm{bi}}\end{array}\right]$

Namely $\left[\begin{array}{c}{m}_{\mathrm{ri}}\\ m_{\mathrm{gi}}\\ m_{\mathrm{bi}}\end{array}\right]=\left[\begin{array}{c}0.01334\\ 0.01481\\ 0.02126\end{array}\right]\·Y_{\mathrm{wi}}-\left[\begin{array}{c}0.00227\\ 0.00285\\ 0.00428\end{array}\right];$

Step 111 is with the first color mixture ratio (m _Rp, m _Gp, m _Bp) be denominator, the second color mixture ratio (m _Ri, m _Gi, m _Bi) be molecule, try to achieve $\left[\begin{array}{c}{c}_r\\ c_g\\ c_b\end{array}\right]=\left[\begin{array}{c}0.0129\\ 0.0143\\ 0.0205\end{array}\right]\·Y_{\mathrm{wi}}-\left[\begin{array}{c}0.00220\\ 0.00275\\ 0.00412\end{array}\right],$ To (c _r, c _g, c _b) carry out normalization, try to achieve redness, green and blue initial yield value $\left[\begin{array}{c}{g}_r\\ g_g\\ g_b\end{array}\right]=\frac{1}{(0.0205\·Y_{\mathrm{wi}}-0.00412)}\·(\left[\begin{array}{c}0.0129\\ 0.0143\\ 0.0205\end{array}\right]\·Y_{\mathrm{wi}}-\left[\begin{array}{c}0.00220\\ 0.00275\\ 0.00412\end{array}\right]),$ Wherein because of Y _WiNumerical value mostly can surpass 100cd/m ², therefore, calculate for convenient, can be with aforementioned (g _r, g _g, g _b) in deducted fractional value omit, and can not produce significantly impact to last result of calculation, that is, $\left[\begin{array}{c}{g}_r\\ g_g\\ g_b\end{array}\right]=\frac{1}{0.0205\·Y_{\mathrm{wi}}}\·\left[\begin{array}{c}0.0129\\ 0.0143\\ 0.0205\end{array}\right]\·Y_{\mathrm{wi}}=\left[\begin{array}{c}0.6297\\ 0.6960\\ 1\end{array}\right];$

Step 112 is with these initial red, green, blue look yield value (g _r, g _g, g _b)=(0.6297,0.6960,1), get respectively this white brightness curve values γ _WPower value reciprocal, and to amplify 2 power side (be 2 in the present embodiment doubly ⁷=128 times), to calculate one group of final adjustment yield value that is consisted of by final red, green, blue look yield value:

$\left[\begin{array}{c}{G}_r\\ G_g\\ G_b\end{array}\right]=128\×\left[\begin{array}{c}{\left(0.6297\right)}^{1/2.45}\\ {\left(0.6960\right)}^{1/2.45}\\ {\left(1\right)}^{1/2.45}\end{array}\right]=\left[\begin{array}{c}106\\ 110\\ 128\end{array}\right];$ And

Step 113 is with these final red, green, blue look yield value (G _r, G _g, G _b)=(106,110,128) be set to display 1.

So, see also again shown in Figure 1, since method of the present invention calculate white, red, green, after the measurement values of Lan Sise, still can obtain first the white brightness curve values of this panel 13, and calculate the values of this panel 13 when showing that the GTG value is zero black image (, the light leak degree of panel 13 when the blank screen picture), these are finally red so go out in subsequent calculations, green, behind the blue yield value, this display 1 can be according to these yield values, this panel 13 is made the most accurate adjustment, the image energy that this panel 13 is demonstrated is more pressed close to colourity and the brightness in the ideal, method of the present invention is not only efficiently solved rely on manpower to carry out the problems such as the man-hour waste of manual adjustment and error over, simultaneously also can allow each display after dispatching from the factory, all can demonstrate identical image quality, significantly promote the yield of product.

Hold, again further it, manufacturer also can be according to international color consortium (International Color Consortium, the form of the color description file (ICC profile) of abbreviation ICC) formulating, these are finally red, green, blue yield value writes in the color description document, and this color description file provided give an electronic installation (not shown), when making this electronic installation be connected with this display 1, this electronic installation can it be sent to the signal of video signal of this display 1 according to the content adjustment of this color description file, so, can reach equally the effect that preferred embodiment of the present invention institute wish is pursued, all those skilled in the art scholars, after consulting the disclosed technology of these embodiment can think easily and equivalence change or modify, all should be encompassed in the claim of the present invention, close first Chen Ming.

This special person of carrying, outside aforesaid gain regulator 3 decapacitation and measurement mechanism 2 integrate, still can be directly built-in to display 1, in addition, in the previous embodiment, although before the first color mixture ratio of calculating and the second color mixture ratio, can first original white be measured values, red measurement group values, the green values of measuring, blue values and the ideal white values measured, deduct respectively black and measure values, but in other embodiments of the invention, also can not deduct black and measure values, and directly calculate the first color mixture ratio and the second color mixture ratio, main cause is, the light leak degree of present display all can be controlled in the critical field by the dealer, impact with the show image that reduces its counter plate, meaning namely, method of the present invention also can be omitted abovementioned steps 105, calculate the stage that these proofread and correct values in 107 and 108, the present invention directly measures values with these and calculates the first color ratio and the second color mixture ratio, so that can be applied on the product of different demands.In addition, in other preferred embodiments of the present invention, the dealer also can measure this red, green, blue look measurement values, and after calculating this white brightness curve values and the desirable values of this white, measure again this black and measure values, and calculate according to this these and proofread and correct values, and then carry out abovementioned steps 109～step 113, so, also can reach the identical result with this case the first preferred embodiment.

The above only is some preferred embodiments of the present invention, the technical characterictic that the present invention advocates; be not limited to this, by all phase those skilled in the art, according to the disclosed technology contents of the present invention; can think easily and equivalence change, all should not break away from protection category of the present invention.

Claims (8)

1. the white brightness parameter with display pannel imports according to the optical characteristics of the original three primary colors of display pannel and white and calculates the gray level white balance yield value to improve the method for its adjusting gray scale white balance precision, it is characterized in that, described method is to be applied on the display, the color of an image that presents on one panel of described display is corresponding to one group of values, described group of values comprises tristimulus values, described panel utilizes described group of values to blend together color, make described color can correspond to a GTG value, described method comprises the following steps:

Show one first white image at described panel, the described first white image has one and sets the GTG value;

With colourity and the brightness of described the first white image of apparatus measures, measure values to obtain one group of corresponding original white;

Show the whole red image with described setting GTG value at described panel, and with colourity and the brightness of the described whole red image of apparatus measures, to obtain one group of corresponding red values of measuring;

Show the complete green image with described setting GTG value at described panel, and with colourity and the brightness of the described complete green image of apparatus measures, to obtain one group of corresponding green values of measuring;

Show the complete blue image with described setting GTG value at described panel, and with colourity and the brightness of the described complete blue image of apparatus measures, to obtain one group of corresponding blue values of measuring;

Calculate a white brightness curve values of described panel;

Calculate the one group ideal white values corresponding with an ideal white image;

According to the color mixture law, and according to described original white measurement values, redness measurement values, green values and the blueness measurement values measured, calculate one first color mixture ratio;

According to the color mixture law, and according to described ideal white values, red values, green values and the blue values of measuring measured measured, calculate one second color mixture ratio;

According to described the first color mixture ratio and described the second color mixture ratio, calculate an initial red gain value, an initial green yield value and an initial blue gain value; And

Described white brightness curve values is calculated with described initial red gain value, initial green yield value and initial blue gain value respectively, to obtain respectively a final red gain value, a final green gain value and a final blue gain value.

2. the method for claim 1, it is characterized in that, measure the method for described white brightness curve values, it is the white image that shows high gray at described panel, and according to brightness and the GTG value of white image, the first white image and all black image of described high gray, calculate described white brightness curve values.

3. method as claimed in claim 2 is characterized in that, after calculating described ideal white values, is to calculate through the following steps described these color ratios:

According to the color mixture law, calculate described red values, green measurement values and the blue values of measuring measured and blend the required color mixture ratio of described original white measurement values, as described the first color mixture ratio; And

According to the color mixture law, calculate described red values, green measurement values and the blue values of measuring measured and blend the required color mixture ratio of described ideal white values, as described the second color mixture ratio.

4. method as claimed in claim 2, it is characterized in that, after calculating described redness measurement values, green measurement values and blue measurement values, still can show that a GTG value is an all black image of zero at described display, and with colourity and the brightness of the described all black image of apparatus measures, measure values to obtain one group of corresponding black; Wait calculate described white brightness curve values after, can calculate described these color ratios with the following step:

Described group of original white values, red measurement values, green measurement values and the blue values of measuring measured deducted respectively described group of black measurement values, to obtain respectively an original white correction values, a red-correction values, a green correction values and a blue-correction values;

Described ideal white values is deducted described black measure values, proofread and correct values to obtain an ideal white;

According to the color mixture law, calculate described red-correction values, green correction values and blue-correction values and blend the required color mixture ratio of described original white correction values, as described the first color mixture ratio; And

According to the color mixture law, calculate described red-correction values, green correction values and blue-correction values and blend the required color mixture ratio of described ideal white correction values, as described the second color mixture ratio.

5. such as claim 3 or 4 described methods, it is characterized in that, after calculating described these initial red gain values, initial green yield value and initial blue gain value, it is the power value reciprocal of described these yield values being got respectively described white brightness curve values, amplify again 2 power side doubly after, to obtain respectively described final red gain value, final green gain value and final blue gain value.

6. method as claimed in claim 5 is characterized in that, described 2 power side doubly is 128 times.

7. method as claimed in claim 6, it is characterized in that, after calculating described final red gain value, final green gain value and final blue gain value, described final red gain value, final green gain value and final blue gain value are to be set to described display, make the according to this color representation of the described panel of adjustment of described display.

8. method as claimed in claim 6, it is characterized in that, after calculating described final red gain value, final green gain value and final blue gain value, described final red gain value, final green gain value and final blue gain value will be written in the color description document, and described color description file can be provided and give an electronic installation, with in described electronic installation and situation that described display is connected, described electronic installation can be according to described color description file, the signal of video signal of the described display of adjustment.

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