TW201337904A - Method of computing grayscale white balance gain by introducing brightness parameters of three primary colors of display panel to increase precision of grayscale white balance calibration thereof - Google Patents

Abstract

This invention relates to a method of computing a grayscale white balance gain according to optical characteristics of original three primary colors and white color of a display panel through introducing brightness parameters of the three primary colors of the display panel to increase the precision of grayscale white balance calibration thereof. The method comprises: respectively displaying a pure white color image, a pure red color image, a pure green color image and a pure blue color image of a plurality of grayscale values on a display panel; measuring the images with an instrument to obtain the corresponding three stimulation values and measure the brightness values; simultaneously using the brightness values measured from the pure red, green and blue color images of each grayscale value to compute the initial red, green and blue brightness plot values of the panel; according to the three stimulation values of the pure white, red, green and blue color images of a predetermined grayscale value, computing a first color mixing ratio; according to a desired stimulation value of a desired pure white color image of a target color temperature, computing a second color mixing ratio; according to the color mixing ratios, computing initial red, green and blue color gains; according to the initial red, green and blue color gains and the initial red, green and blue brightness plot values, computing final red, green and blue color gains.

Description

Introducing the three primary color brightness parameters of the display panel into the gray level white balance gain value according to the original three primary colors of the display panel and the white optical characteristics to improve the gray scale white balance adjustment accuracy

The invention relates to a method for obtaining a gain value of a gray scale white balance of a display panel, in particular to a brightness parameter including three primary colors, and a gain value obtaining method for considering the degree of light leakage of the all black screen.

Press, as the size of the panel of the display gradually increases, the performance of the image details is more noticeable, especially the color rendering of the panel, such as: color saturation (Saturation), chromaticity value (Chromatic value) and brightness value (Luminance), etc., are important features of the consumer's evaluation of the display device.

Generally speaking, the current display is divided into a plurality of pixels (Pixel) on the panel, and each pixel includes three primary color light units of red, green, blue, etc., and the display can respectively light red, green, blue and other three primary colors, respectively Mixing at different brightness ratios to form a color vision effect equivalent to visible light of various frequencies to the eyes of the human body. However, in the process of display production, panels formed by different materials and processes (such as TN panels, VA panels, IPS panels, etc.) will produce different color performance and will affect the user. The viewing effect, therefore, in order to make the color performance of the display close to the ideal color temperature, the operator must adjust the Grayscale white balance one by one. The so-called gray-scale white balance adjustment method is based on the image displayed by the display (such as: all-white image), and adjusts the gain value (Gain) of the three primary color image intensities such as red, green, and blue, so that the image color of the display can be close to a target color. Chroma value and brightness value.

In addition, in order to provide a convenient and accurate adjustment procedure for the gray scale white balance, instead of manually adjusting the white balance of the gray scale, the applicant has proposed in the country on November 17, 2006, "the gray scale white of the display device. Patent application for balanced gain determination method and device", and announced on September 1, 2011, No. I348150 was approved. The technical means of No. I348150 is to display an all-white, a full-red, a full-green and a full-blue image on a panel, and respectively measure the chromaticity value and the brightness value of the images, and Still obtaining a chromaticity value and a brightness value of a target white image, and calculating a first color mixing ratio according to the chromaticity value and the brightness value of the all white, all red, all green, and all blue images, and Calculating a second set of color mixing ratios according to the chromaticity values and brightness values of the target white, all red, all green, and all blue images, and finally, calculating according to the first group and the second group of color mixing ratios A red gain value, a green gain value, and a blue gain value, so that the display can adjust the display color of the output image of the panel according to the respective gain values, so that the image color presented by the panel can be close to the ideal color temperature. Express color.

Although the technical means of the No. I348150 patent can greatly improve the lack of manual adjustment, the applicant finds in the process of continuously developing related fields of the display that the foregoing technical means are applied to a part of the display, and the panel presents The color of the image will be inaccurate with the color of the ideal color temperature. The reason is that the different types of panel have different gamma curves, just like the above, red, green, blue and other three primary colors, and then When mixed with different brightness ratios, the color vision effect equivalent to visible light of various frequencies is formed on the human eye. Therefore, panels with different gray-scale brightness curves use the same red, green, and blue gains. After the value, the color of the images between them will obviously be inconsistent. Secondly, the current display on the market is affected by the panel quality and assembly process. Usually, when displaying a full black screen with a grayscale value of zero, different degrees of light leakage will occur. Therefore, the same red, green and blue When the gain value is applied to the panel with different light leakage levels, the image color presented by each panel is also generated, and the error color of the ideal color temperature is generated, which affects the viewing quality of the user.

Therefore, how to solve the above problems, a more appropriate method for obtaining the gain value of the panel is designed, so that the image quality of the display can be greatly improved, and the image quality of each display is consistent, which is the current display industry. Thinking about the major issues.

In view of the technical means previously approved by the applicant, there are still some defects in actual use. Therefore, after long-term efforts and experiments, the applicant finally developed and designed a brightness factor of the three primary colors of the display panel of the present invention. Introducing a gray scale white balance gain value based on the original three primary colors of the display panel and white optical characteristics to improve the gray scale white balance adjustment accuracy, so that the present invention can effectively solve the aforementioned problems, so that the industry can Providing a better display product for users, thereby increasing the market competitiveness of the industry.

An object of the present invention is to provide a method for obtaining a gray scale white balance gain value through three primary color brightness parameters of a display panel, so that the display can obtain corresponding red, green, and blue gain values according to its own gray scale brightness curve, The color of the image presented by the panel can be close to or conform to the color performance of the ideal color temperature. The method can display a plurality of all-white images on one panel of the display, each of the white images having different grayscale values, and respectively Forming a full red image, a full green image, and a full blue image corresponding to the gray scale values, and measuring one of the chroma values and one brightness value of each of the all white images by the instrument (Luminance) And obtaining a tristimulus value corresponding to a predetermined grayscale value of the grayscale values, wherein the corresponding tristimulus value is defined as a first stimulus value; for the same reason, each panel also displays each The full red image, the full green image, and the full blue image corresponding to the grayscale value, and the chromaticity value and the brightness value of the image are respectively measured by the instrument to obtain corresponding correspondences in sequence The stimulus value and the measured brightness value, 嗣, from the full red image, the full green image, and the full blue image corresponding to the predetermined grayscale value, sequentially obtaining one of the second stimulation value, the third stimulation value, a fourth stimulus value, and an initial red luminance curve (Gamma Curve) value of the panel is calculated by using the measured luminance values corresponding to the full red image, the full green image, and the full blue image, respectively. An initial green brightness curve value and an initial blue brightness curve value, and according to a color matching (Color Matching) law, and according to the first stimulation value, the second stimulation value, the third stimulation value, and the fourth stimulation value, Calculating a first color mixture ratios; and calculating a second color mixture ratios according to the color matching law and based on an ideal stimulus value of an ideal all-white image of a target color temperature, Finally, an initial red gain value, an initial green gain value, and an initial blue gain value are calculated according to the first color mixing ratio and the second color mixing ratio, and according to the initial red gain value, The green gain value and the initial blue gain value and the initial red brightness curve value, the initial green brightness curve value, and the initial blue brightness curve value, and a final red gain value, a final green gain value, and a final blue gain value are calculated, The display can adjust the grayscale white balance of the panel through the final red gain value, the final green gain value and the final blue gain value to improve the color performance of the panel.

Another object of the present invention is that in the foregoing method, a full black image having a grayscale value of zero is displayed on the panel, and the chromaticity value and the luminance value of the full black image are measured by the instrument to obtain a fifth stimulus value and a corresponding measured brightness value, wherein the first stimulus value, the second stimulus value, the third stimulus value, and the fourth stimulus value are respectively subtracted from the fifth stimulus value, and then calculated The first color mixing ratio is obtained, and the ideal stimulus value is deducted from the fifth stimulus value, and then the second color mixing ratio is calculated. Thus, the final red gain value, the final green gain value, and the final blue used by the display on the panel The color gain value not only includes the influence of the grayscale brightness curve corresponding to the panel, but also includes the influence of the degree of light leakage corresponding to the panel, so that the color of the panel can be close to or conform to the performance color of the ideal color temperature.

For your convenience, the review committee can make a further understanding and understanding of the purpose, technical features and effects of the present invention. The embodiments are combined with the drawings, and the details are as follows:

Cha, the International Commission on Illumination (CIE) founded the CIE XYZ standard colorimetric system in 1931, which theoretically assumes that there are three primary colors that do not exist in nature, namely the theoretical three primary colors, in order to be prepared by the aforementioned theoretical three primary colors. All colors, therefore, CIE XYZ color system is a mathematical way to define the color space, which can convert the chromaticity coordinates and brightness (x, y, Y) into the theoretical three primary colors (X, Y, according to the following formula (1), Z), where X, Y and Z refer to the tristimulus values of the three primary colors of red, green and blue, ie their stimulating energy to the human eye:

By means of the representation of the tristimulus values, the predetermined color can be represented. In the second check, the gamma curve refers to the relationship between different gray levels and brightness. Since the early displays all use the cathode ray tube (CRT) screen, the display is between gray scale and brightness. The feature is roughly the power law, as shown in the following formula (2):

Output Luminance = (maximum brightness - minimum brightness) X (gray scale value / 255) ^γ + minimum brightness... (2)

Where γ represents the brightness curve value. The applicant combines the foregoing formula with the steps of the present invention, so that a set of gain values of the three primary colors of red, green, and blue obtained can include changes in the brightness curve corresponding to each panel, and the display is corrected accordingly. In order to make it show the best color performance.

The invention relates to a method for introducing the brightness values of the three primary colors of the display panel into the gray level white balance gain value according to the original three primary colors of the display panel and the white optical characteristics to improve the gray scale white balance adjustment precision, so as to make the general public and related operators A quick understanding of the overall technical features of the present invention, a simple description of one of the hardware architectures that can be used in the present invention, is not limited to the hardware architecture described later. As shown in FIG. 1 , a display 1 includes a control unit 11 , a panel 13 , an image processing unit 15 , and a storage unit 17 . The control unit 11 is respectively connected to the panel 13 , the image processing unit 15 and the storage unit . 17, receiving the data transmitted from the image processing unit 15, the storage unit 17, or transmitting the data to the panel 13, the storage unit 17, and the image processing unit 15 can receive the video signal transmitted from the outside, and can The video signal is decoded, deinterleaved, and the like, and then transmitted to the control unit 11. In addition, the storage unit 17 can store the gain values corresponding to the three primary colors of red, green, and blue, so that the control unit 11 can be used by the foregoing The gain value is compensated for the three primary colors of the video signal and displayed on the panel 13. Furthermore, the manufacturer may also write the aforementioned gain value into a color description file according to the format of an ICC profile formulated by the International Color Consortium (ICC), and the color is The description file is provided to an electronic device (not shown) for connecting the electronic device to the display 1 , and the electronic device can correct the image signal sent to the display 1 according to the content of the color description file, The same can be achieved by the preferred embodiment of the present invention. Those skilled in the art can easily think of equivalent changes or modifications after referring to the technical features disclosed in the following embodiments. It should be covered within the scope of the patent application of the present invention.

Referring to FIG. 1 , the display 1 can enable the panel 13 to display a plurality of full white images, a plurality of full red images, a plurality of full green images, and a plurality of all blue images, and gray, respectively, of different gray scale values. An image of a full black image having a zero order value, and a measuring device 2 can respectively display the full white image, each of the full red images, each of the full green images, and the entire blue color displayed on the panel 13. The image is measured with Chromatic values and Luminance of the full black image, and the measured result is transmitted to a gain determining device 3. In addition, the operator can also input the chromaticity value and the luminance value of the ideal all-white image of the target color temperature to the gain determining device 3, and hereby declare that the ideal all-white image of the target color temperature is theoretically in a certain When a target color temperature (such as: 9300K), the chromaticity value and the brightness value of the all-white image should be combined.

As shown in FIG. 1 , a first receiving module 31 of the gain determining device 3 can convert the tristimulus values corresponding to the all-white images according to the received measurement results ( X _wpi , Y _wpi , Z _wpi ) and a corresponding first set of all whiteness measured brightness values Y _wpi , and the corresponding three stimulus values are defined as a first set of all white stimulus values W _pi ( X _wpi , Y _Wpi , Z _wpi ); similarly, a second receiving module 32 can receive the measurement results of the full red image corresponding to the grayscale values to obtain the second set of full red stimulation corresponding to the full red images The values R _pi ( X _ri , Y _ri , Z _ri ) and a second set of full red measurement brightness values Y _ri ; a third receiving module 33 can receive the measurement of the full green image corresponding to the gray scale values As a result, a third set of all-green stimulation values G _pi ( X _gi , Y _gi , Z _gi ) corresponding to the all-green images and a third set of total green-measurement luminance values Y _gi are obtained to obtain a fourth receiving mode. The group 34 can receive the measurement results of the all blue images corresponding to the grayscale values to obtain the fourth set of all blue stimulus values B _pi ( X _bi , Y corresponding to the all blue images) _Bi , Z _bi ) and a fourth group of all-blue measurement brightness value Y _bi ; a fifth receiving module 35 can receive the measurement result of the all-black image to obtain the fifth stimulus value corresponding to the all-black image W ₀ ( X _{w 0} , Y _{w 0} , Z _{w 0} ) and a fifth measurement brightness value Y _{w 0} .

Referring to FIG. 1 , a first calculation module 41 of the gain determining device 3 can measure the brightness value Y _ri by using the second group of total red quantity and the brightness value Y _{gi of} the third group of total green quantity. the fourth set of all blue luminance values Y _bi measured, and the measured fifth luminance value Y _{w 0,} according to the equation (2), one of the panel were calculated initial values of red luminance curve of γ _R 13, a The initial green luminance curve value γ _G and an initial blue luminance curve value γ _B . In addition, a sixth receiving module 36 can receive the chrominance value and the luminance value of the ideal all-white image, and assume that the chromaticity value and the luminance value of the ideal all-white image of the target color temperature are W _t ( x _wt , y _wt , Y _wt ), according to the CIE XYZ color system, the sixth receiving module 36 can convert it into an XYZ tristimulus value according to the above formula (1), wherein Y _wt is an unknown number, as shown in the following formula (3):

The sixth receiving module 36 can obtain the ideal stimulation value W _t ( X _wt , Y _wt , Z _wt ) of the ideal all-white image of the target color temperature.

In addition, as shown in FIG. 1 , a second calculation module 42 of the gain determining device 3 can be from the first set of all white stimulus values W _pi ( X _wpi , Y _wpi , Z _wpi ). A stimulus value W _pa ( X _wpa , Y _wpa , Z _wpa ) of a predetermined gray scale value a is defined as a first stimulus value; from the second set of full red stimulus values R _pi ( X _ri , Y _ri , Z _ri ) a stimulus value R _pa ( X _ra , Y _ra , Z _ra ) of the predetermined gray scale value a is defined as a second stimulus value; from the third group of full green stimulus values G _pi ( X _gi , Y _gi , Z _gi a stimulus value G _pa ( X _ga , Y _ga , Z _ga ) of the predetermined gray scale value a is defined as a third stimulus value; from the fourth group of all blue stimulus values B _pi ( X _bi , Y _bi , In Z _bi ), the stimulation value B _pa ( X _ba , Y _ba , Z _ba ) of the predetermined gray scale value a is defined as a fourth stimulation value, and each of the aforementioned stimulation values is respectively subtracted from the fifth stimulation value W ₀ ( X _{w 0} , Y _{w 0} , Z _{w 0} ), as shown in the following formulas (4) to (7):

In addition, the second calculation module 42 processes the respective stimulation values of the foregoing formulas (4) to (7) according to a color matching law (Color Matching), for example, assuming a unit brightness Is the brightness of the unit by m _rp , m _gp unit brightness With m _bp unit brightness Mixed, as shown in the following formula (8):

Therefore, the first stimulus of the full white image of the display 1 can be seen by the above formulas (4) to (8). According to the following formula (9), the second stimulus value of the full red image Third stimulus value of the full green image And the fourth stimulus value of the full blue image Combined:

Thus, the following formula (10) can be derived from equation (9):

In turn, the first color mixture ratios ( m _rp , m _gp , m _bp ) of the all-white image presented by the display 1 can be obtained, that is, the red color included in the all-white image, The mixing ratio of the three primary colors of green and blue.

Similarly, as shown in FIG. 1 , a third calculation module 43 of the gain determining device 3 can receive the ideal stimulation value W _t ( X _wt , Y _wt , Z _wt ), and the ideal stimulation value W _t ( X _wt , Y _wt , Z _wt ) deducting the fifth set of stimulation values W ₀ ( X _{w 0} , Y _{w 0} , Z _{w 0} ) as shown in the following formula (11):

And, according to the color matching law, assume a unit brightness Is brightness by m _rt unit , m _gt unit brightness With m _bt unit brightness Mixed, as shown in the following formula (12):

Then, the third calculating module 43 processes the stimulus value of the foregoing formula (11) according to the color matching law, as shown in the following formulas (13), (14):

To obtain a second color mixing ratio ( m _rt , m _gt , m _bt ) of the ideal all-white image of the target color temperature.

Referring to FIG. 1 , a fourth calculation module 44 of the gain determining device 3 receives the first color mixing ratio ( m _rp , m _gp , m _bp ) and the second color mixing ratio ( m _rt , After m _gt , m _bt ), the first color mixing ratio ( m _rp , m _gp , m _bp ) is used as the denominator, and the second color mixing ratio ( m _rt , m _gt , m _bt ) is taken as the numerator to calculate The gain values of red, green, and blue ( c _r , c _g , c _b ) are as shown in the following formula (15):

At the same time, the fourth calculation module 44 still normalizes the aforementioned formula to ( g _r , g _g , g _b ), as shown in the following formula (16):

An initial red gain value g _r , an initial green gain value g _{g ,} and an initial blue gain value g _b of the panel 13 of the display 1 are obtained.第五, a fifth calculation module 45 can respectively receive the initial red luminance curve value γ _R , the initial green luminance curve value γ _G , the initial blue luminance curve value γ _B , and the initial red gain value g _r , the initial green gain value g _g , initial blue gain value g _b , and the initial red, green, and blue gain values ( g _r , g _g , g _b ), respectively, take the brightness curve values (γ _R , γ _G , γ The reciprocal value of _B ), as shown in the following formula (17):

The initial red, green, and blue gain values ( g _r , g _g , g _b ) can be converted into a final red gain value G _r , a final green gain value G _{g ,} and a final blue gain value G _b . In addition, in order to facilitate the processing of the digital circuit, the fifth calculation module 45 calculates the brightness curve values (γ _R , γ _G , γ _B ) and the initial red, green, and blue gain values ( g _r , g _g , g _b ), according to the brightness curve values (γ _R , γ _G , γ _B ) and the initial red, green and blue gain values ( g _r , g _g , g _b ) Calculate the result and then amplify the power of 2 (eg, 2 ⁷ = 128 times) to calculate the final red, green, and blue gain values ( G _r , G _g , G _b ), as shown in the following formula (18) :

In this way, the gain determining device 3 can transmit the final red, green, and blue gain values ( G _r , G _g , G _b ) to the storage unit 17 of the display 1 for storage, so that the display 1 can The color representation of the panel 13 is automatically adjusted based on the final red gain value G _r , the final green gain value G _{g ,} and the final blue gain value G _b , however, in other embodiments of the invention, the power is not The power is limited to the limit, and can be designed according to the needs of the industry, with different magnifications.

In order to clearly disclose the foregoing technical features, the applicant specifically describes an example, as shown in FIGS. 1 and 2A and 2B: (101) displaying a plurality of all-white images of different grayscale values on the panel 13, and in instruments (including measuring means 2 and the gain determination unit 3) and the chroma values were measured luminance value of such all-white image, and to obtain a first set of measured full white luminance value Y _wpi and wherein a predetermined gray level value a first stimulus value of a, wherein the first stimulus value W _pa ( X _wpa , Y _wpa , Z _wpa )=(65.160, 69.479, 72.639); (102) respectively displaying the gray scale values on the panel 13 a plurality of full red images, and respectively measuring chromaticity values and brightness values of the full red images by the instrument, and obtaining a second set of full red color measurement brightness values Y _ri and obtaining a second stimulation of the predetermined gray level value a a value, wherein the second stimulus value R _pa ( X _ra , Y _ra , Z _ra )=(30.135, 15.772, 1.362); (103) respectively displaying a plurality of full green images having the gray scale values on the panel 13 , and the instrument to measure these chrominance values, respectively, and the luminance values of all green image, and a third group made all green measured luminance value Y _gi Acquires the predetermined gray level value of a third stimulus values, wherein the third stimulus value _{G pa (X ga, Y ga} , Z ga) = (22.791,46.143,10.767); (104) are displayed on the panel 13 having a a plurality of such full blue gray value image, and the luminance and chrominance values to the full value of the blue image measuring instrument are such, and to obtain a fourth set of all blue luminance measured value and obtaining the predetermined Y _bi a fourth set of stimulation values of the gray scale value a, wherein the fourth set of stimulation values B _pa ( X _ba , Y _ba , Z _ba )=(10.314,5.439, 58.419); (105) displayed on the panel 13 with gray scale A full black image with a value of zero, and the chromaticity value and the brightness value of the all black image are measured by the instrument to obtain a fifth stimulus value and a fifth amount of measured brightness value Y _{w 0} , wherein the fifth stimulus value W ₀ ( X _{w 0} , Y _{w 0} , Z _{w 0} )=(0.176, 0.189, 0.281); (106) using the second set of total red amount to measure the brightness value Y _ri , the third group of all green quantity to measure the brightness value Y _gi , the first Four sets of all-blue measurement brightness value Y _bi and a fifth quantity measurement brightness value Y _{w 0} respectively calculate the initial red, green and blue brightness curve values of the panel 13 (γ _R , γ _G , γ _B )=(2.62 , 2.61, 3.18); (107) according to the above formula (4) ~ (7) The first stimulus, the second stimulus value, the third value and the fourth stimulation stimulus value net of the fifth stimulus values, so that after the first stimulation fifth stimulus value is deducted: = (64.983, 69.291, 72.359), the second stimulus value after the fifth stimulus value has been deducted, = (29.959, 15.583, 1.081), the third stimulus value after the fifth stimulus value has been deducted: = (22.615, 45.954, 10.486), the fourth stimulus value after the fifth stimulus value has been deducted: = (10.137, 5.250, 58.139); (108) according to the above formulas (8) to (9), the first stimulus value, the second stimulus value, the third stimulus value, and the fourth after the fifth stimulus value has been deducted Stimulus value, according to the color matching law, such as: , calculate the first color mixing ratio (109) Enter the ideal stimulus value of the ideal all-white image of the target color temperature. If the target color temperature is D93, the chromaticity value and the luminance value of the ideal all-white image are W _t (0.283, 0.298, Y _wt ). In the foregoing formula (3), the ideal stimulus value W _t ( X _wt , Y _wt , Z _wt )=(0.9497, 1, 1.406) ‧ Y _wt , and, after deducting the ideal stimulus value from the fifth stimulus value, deducted The ideal stimulus value after the fifth stimulus value is: _{= (0.950,1,1.406) ‧ Y wt -} (0.176,0.189,0.281); (110) according to the equation (12) to (13), which has been the stimulus value over a fifth stimulus value deduction, according to color Law, such as: , calculate the second color mixing ratio (111) Calculate the first color mixing ratio and the second color mixing ratio according to the above formulas (15) to (16), such as: And after normalization, the initial red, green, and blue gain values can be obtained. , in which the value of Y _wt is mostly more than 100 cd/m 2 , therefore, for the convenience of calculation, the decimal value deducted in the above ( g _r , g _g , g _b ) can be omitted, and the final calculation result is not obtained. Have a large impact, such as:

(112) according to the initial red, green, and blue gain values ( g _r , g _g , g _b )=(0.6297, 0.6960, 1), and the initial red, green, and blue brightness curve values (γ _R , γ _G , γ _B )=(2.62, 2.61, 3.18), perform calculation processing, and amplify the power of 2 (eg, 2 ⁷ = 128 times) to calculate the final red, green, and blue gain values. And (113) set the final red, green, and blue gain values ( G _r , G _g , G _b )=(107, 111, 128) to the display 1.

According to the above description, the final red, green and blue gain values ( G _r , G _g , G _{b )} can be calculated immediately after the detection of each display before shipment by the method of the present invention. ), and the aforementioned final red, green, and blue gain values ( G _r , G _g , G _b ) still include the influence of the corresponding gray-scale brightness curve and the corresponding degree of light leakage, and no manual adjustment is required at all. In the case of operation, the display can automatically compensate the red, green and blue primary colors of the panel output according to the final red, green and blue gain values ( G _r , G _g , G _b ), so that the display is optimal. The color performance effectively avoids the waste of man-hours and human error caused by the manual adjustment process, and can be automatically adjusted according to the gray-scale white balance characteristic and the gray-scale brightness curve of each display, so that each test and adjustment is completed. A monitor can achieve the best color performance.

In particular, the gain determining device described above can be built into the display in addition to being integrated with the measuring device. In addition, in the foregoing embodiment, although the first color mixing ratio and the second color are calculated, Before the mixing ratio, the first stimulation value, the second stimulation value, the third stimulation value, the fourth stimulation value, and the ideal stimulation value are respectively subtracted from the fifth stimulation value, but in other embodiments of the present invention, After subtracting the fifth stimulus value, the first color mixing ratio and the second color mixing ratio are directly calculated. The main reason is that the current light leakage level of the display is controlled by the operator within a standard range to reduce the display of the panel. The influence of the image, therefore, the method of the present invention can omit the aforementioned step (105), so that the present invention can be applied to products of different needs, and in the foregoing embodiment of the present invention, the initial red luminance curve value γ _{R is} calculated. the initial green luminance curve when γ _G value and the initial value of the blue luminance curve γ _B, are measured with the fifth luminance value Y _{w 0} is calculated, but in other embodiments of the present invention embodiment Zheyi industry is possible only by the value of the second set of measuring all red luminance Y _ri, measuring a third set of all green luminance value Y _gi, all blue fourth group Y _bi measured luminance value is calculated, the first engagement stating.

The above is only the preferred embodiment of the present invention, but the scope of the claims of the present invention is not limited thereto, and according to those skilled in the art, according to the technical content disclosed in the present invention, Equivalent changes that are easily considered are within the scope of protection of the invention.

1. . . monitor

11. . . control unit

13. . . panel

15. . . Image processing unit

17. . . Storage unit

2. . . Measuring device

3. . . Gain decision device

31. . . First receiving module

32. . . Second receiving module

33. . . Third receiving module

34. . . Fourth receiving module

35. . . Fifth receiving module

36. . . Sixth receiving module

41. . . First computing module

42. . . Second computing module

43. . . Third computing module

44. . . Fourth computing module

45. . . Fifth computing module

Figure 1 is a hardware architecture diagram of the present invention;

2A is a half flow chart of the present invention; and

Figure 2B is a half flow chart of the present invention.

Claims (7)

A method for introducing a brightness parameter of three primary colors of a display panel into a gray scale white balance gain value according to the original three primary colors of the display panel and white optical characteristics to improve the gray scale white balance adjustment accuracy, the method is applied to a display, including Displaying a plurality of all-white images corresponding to a plurality of grayscale values on one panel of a display, and each of the all-white images is respectively represented by a full red image, a full green image, and an all blue corresponding to the grayscale values The image is mixed and formed; the chromaticity value and the brightness value of each of the all-white images are measured by the instrument to obtain a corresponding first set of all white stimulus values and a corresponding first set of all whiteness measured brightness values, and the The stimulus value corresponding to a predetermined gray scale value of the first set of all white stimulus values is defined as a first stimulus value; each of the full red images having the gray scale values is respectively displayed on the panel, and the instrument is used Measure the chrominance value and the brightness value of each of the full red images to obtain a corresponding second set of full red stimulus values and a corresponding second set of total red amount measured brightness values, and the second set of full red stimulus values The stimulus value corresponding to the predetermined grayscale value is defined as a second stimulus value; each of the full green images having the grayscale values is respectively displayed on the panel, and each of the green images is measured by an instrument. a chrominance value and a brightness value to obtain a corresponding third set of all green stimuli values and a corresponding third set of all green saliency values, and the predetermined gradation values of the third set of all green stimuli values Corresponding stimulating value is defined as a third stimulating value; each blue-blue image having each of the gray-scale values is respectively displayed on the panel, and the chromaticity value and brightness of each of the all-blue images are measured by an instrument. a value to obtain a corresponding fourth set of all blue stimulus values and a corresponding fourth set of all blue color measured brightness values, and the stimulus value corresponding to the predetermined gray scale value of the fourth set of all blue stimulus values is Defined as a fourth stimulus value; using the second set of total red amount measurement brightness value, the third group of total green quantity measurement brightness value and the fourth group of full blue quantity measurement brightness value, respectively calculating an initial of the panel Red brightness curve value, an initial green brightness curve value, and an initial blue brightness curve value; a color matching law, and calculating a first color mixing ratio according to the first stimulation value, the second stimulation value, the third stimulation value, and the fourth stimulation value; and inputting an ideal full white image of a target color temperature a stimulus value, according to the color matching law, and calculating a second color mixing ratio according to the ideal stimulus value; calculating an initial red gain value, an initial green color according to the first color mixing ratio and the second color mixing ratio a gain value and an initial blue gain value; and according to the initial red gain value, the initial green gain value and the initial blue gain value and the initial red brightness curve value, the initial green brightness curve value, and the initial blue brightness curve The value calculates a final red gain value, a final green gain value, and a final blue gain value. The method of claim 1, wherein before calculating the first color mixing ratio and the second color mixing ratio, the method further includes: displaying a full black image having a grayscale value of zero on the panel, And measuring the chromaticity value and the brightness value of the full black image by the instrument to obtain a corresponding tristimulus value and a corresponding fifth amount of the measured brightness value, and the corresponding tristimulus value is defined as a fifth stimulation value. And the first stimulus value, the second stimulus value, the third stimulus value, and the fourth stimulus value respectively subtract the fifth stimulus value, and then calculate the first color mixing ratio, and the ideal stimulus value After the fifth stimulus value is deducted, the second color mixing ratio is calculated. The method of claim 2, wherein the fifth measured brightness value is further increased for calculation before the initial red brightness curve value, the initial green brightness curve value, and the initial blue brightness curve value are calculated. The method of claim 1, 2 or 3, wherein the initial red gain value, the initial green gain value, before the final red gain value, the final green gain value, and the final blue gain value are calculated And the initial blue gain value, respectively, the corresponding initial red brightness curve value, the initial green brightness curve value, and the inverse power value of the initial blue brightness curve value, and then a predetermined multiple of magnification is calculated to calculate The final red gain value, the final green gain value, and the final blue gain value. The method of claim 4, wherein the predetermined multiple is a power of two. The method of claim 5, wherein the final red gain value, the final green gain value, and the final blue gain value are still set to the display. The method of claim 5, further comprising: writing the final red gain value, the final green gain value, and the final blue gain value into a color description file, and storing the color description file to an electronic device, And in the state that the electronic device is connected to the display, the electronic device is caused to correct the image signal sent to the display according to the content of the color profile.