Brightness correction method and device for display panel

Abstract

The application discloses a display panel brightness chroma correction method and device, comprising: obtaining an initial brightness chroma value corresponding to an initial gray scale value of a display panel; obtaining an intermediate brightness chroma value according to the initial gray scale value and a first preset adjustment value; calculating a brightness chroma influence weight according to the initial brightness chroma value, the intermediate brightness chroma value and the first preset adjustment value; obtaining a target brightness chroma value of the display panel; obtaining a first target gray scale value according to the target brightness chroma value, the brightness chroma influence weight and the initial brightness chroma value; obtaining a first target brightness chroma value corresponding to the first target gray scale value of the display panel; judging whether a difference between the first target brightness chroma value and the target brightness chroma value is within a preset brightness chroma value range; and in the case that the difference between the first target brightness chroma value and the target brightness chroma value is within the preset brightness chroma value range, assigning the first target gray scale value as a target gray scale value. The technical problem of time-consuming and low accuracy in the way of brightness chroma correction of the display panel is solved.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a method and apparatus for luminance and color correction of a display panel. Background Technology

[0002] Existing video walls are mostly constructed by splicing together multiple display panels. However, even when produced in the same process, different display panels will have certain differences, resulting in variations in brightness and color between the images displayed on the multiple panels in the video wall. Therefore, before splicing multiple display panels into a video wall, it is necessary to calibrate the brightness and color of each display panel to minimize the differences between them. Currently, brightness and color calibration of display panels is usually done manually. However, this method is not only time-consuming but also has low accuracy. Summary of the Invention

[0003] The embodiments of this application provide a method and apparatus for luminance and chromaticity correction of a display panel, so as to solve the technical problems of excessive time consumption and low accuracy in the prior art for luminance and chromaticity correction of display panels.

[0004] To address the aforementioned technical problems, embodiments of this application disclose the following technical solutions:

[0005] In a first aspect, a method for luminance and chromaticity correction of a display panel is provided, the method comprising:

[0006] Step A: Obtain the initial luminance and chrominance values ​​corresponding to the initial grayscale values ​​of the display panel;

[0007] Step B: Obtain the intermediate luminance value based on the initial grayscale value and the first preset adjustment value;

[0008] Step C: Calculate the luminance influence weight based on the initial luminance value, the intermediate luminance value, and the first preset adjustment value;

[0009] Step D: Obtain the target luminance and chromaticity values ​​of the display panel;

[0010] Step E: Obtain the first target grayscale value based on the target chromaticity value, the chromaticity influence weight, and the initial chromaticity value;

[0011] Step F: Obtain the first target luminance and chromaticity values ​​corresponding to the first target grayscale value on the display panel;

[0012] Step G: Determine whether the difference between the first target chromaticity value and the target chromaticity value is within the preset chromaticity value range;

[0013] Step H: When the difference between the first target chromaticity value and the target chromaticity value is within the preset chromaticity value range, the first target grayscale value is assigned the target grayscale value.

[0014] In some implementations, the luminance and chromaticity correction method further includes: Step I, when the difference between the first target luminance and chromaticity value and the target luminance and chromaticity value is not within the range of preset luminance and chromaticity values, calculating a second target grayscale value based on the first target grayscale value and a second preset adjustment value; Step J, assigning the second target grayscale value to the first target grayscale value; repeating steps F, G, and H, or repeating steps F, G, I, and J.

[0015] In some implementations, step I includes: increasing or decreasing the first target grayscale value by the second preset adjustment value to obtain the second target grayscale value.

[0016] In some implementations, step E includes: step e1, calculating the luminance difference between the target luminance value and the initial luminance value; step e2, calculating the first target grayscale value based on the luminance influence weight and the luminance difference.

[0017] In some implementations, the intermediate chromaticity value includes a first intermediate chromaticity value, a second intermediate chromaticity value, and a third intermediate chromaticity value; step B includes: step b1, subtracting the first preset adjustment value from the input grayscale value corresponding to the red pixel in the initial grayscale value to obtain a first intermediate grayscale value; step b2, obtaining the first intermediate chromaticity value corresponding to the first intermediate grayscale value for the display panel; step b3, subtracting the first preset adjustment value from the input grayscale value corresponding to the green pixel in the initial grayscale value to obtain a second intermediate grayscale value; step b4, obtaining the second intermediate chromaticity value corresponding to the second intermediate grayscale value for the display panel; step b5, subtracting the first preset adjustment value from the input grayscale value corresponding to the blue pixel in the initial grayscale value to obtain a third intermediate grayscale value; step b6, obtaining the third intermediate chromaticity value corresponding to the third intermediate grayscale value for the display panel.

[0018] In some implementations, the luminance influence weights include the influence weights of red pixel grayscale on luminance, green pixel grayscale on luminance, and blue pixel grayscale on luminance; step C includes: step c1, calculating the influence weight of the red pixel grayscale on luminance based on the initial luminance value, the first intermediate luminance value, and the first preset adjustment value; step c2, calculating the influence weight of the green pixel grayscale on luminance based on the initial luminance value, the second intermediate luminance value, and the first preset adjustment value; and step c3, calculating the influence weight of the blue pixel grayscale on luminance based on the initial luminance value, the third intermediate luminance value, and the first preset adjustment value.

[0019] In some implementations, step c1 includes: calculating a first difference, a second difference, and a third difference based on the first initial chromaticity value, the second initial chromaticity value, the third initial chromaticity value, and the first intermediate chromaticity value; and calculating the influence weight of red pixel grayscale on the first sub-chromaticity, the influence weight of red pixel grayscale on the second sub-chromaticity, and the influence weight of red pixel grayscale on the third sub-chromaticity based on the first difference, the second difference, the third difference, and the first preset adjustment value.

[0020] In some implementations, step c2 includes: calculating a fourth difference, a fifth difference, and a sixth difference based on the first initial luminance value, the second initial luminance value, the third initial luminance value, and the second intermediate luminance value; and calculating the influence weight of green pixel grayscale on the first sub-luminance value, the influence weight of green pixel grayscale on the second sub-luminance value, and the influence weight of green pixel grayscale on the third sub-luminance value based on the fourth difference, the fifth difference, the sixth difference, and the first preset adjustment value.

[0021] In some implementations, step c3 includes: calculating a seventh difference, an eighth difference, and a ninth difference based on the first initial luminance value, the second initial luminance value, the third initial luminance value, and the third intermediate luminance value; and calculating the influence weight of blue pixel grayscale on the first sub-luminance value, the influence weight of blue pixel grayscale on the second sub-luminance value, and the influence weight of blue pixel grayscale on the third sub-luminance value based on the seventh difference, the eighth difference, the ninth difference, and the first preset adjustment value.

[0022] Secondly, a luminance and chromaticity correction device for a display panel is provided, the luminance and chromaticity correction device comprising:

[0023] A luminance / chromaticity value acquisition module is used to acquire the initial luminance / chromaticity value corresponding to the initial grayscale value of the display panel, and to acquire an intermediate luminance / chromaticity value based on the initial grayscale value and a first preset adjustment value; and

[0024] The calculation module is used to calculate the luminance influence weight based on the initial luminance value, the intermediate luminance value and the first preset adjustment value, and to obtain the first target grayscale value based on the luminance influence weight, the initial luminance value and the target luminance value obtained by the luminance correction device.

[0025] The luminance and chromaticity value acquisition module is further configured to acquire the first target luminance and chromaticity value corresponding to the first target grayscale value of the display panel;

[0026] The brightness and chromaticity correction device also includes:

[0027] The judgment module is used to determine whether the difference between the first target chromaticity value and the target chromaticity value is within a preset chromaticity value range; and

[0028] The assignment module is used to assign the first target grayscale value as the target grayscale value when the difference between the first target chromaticity value and the target chromaticity value is within a preset chromaticity value range.

[0029] One of the above technical solutions has the following advantages or beneficial effects:

[0030] This application first obtains the initial luminance and chromaticity values ​​corresponding to the initial grayscale values ​​of the display panel, and obtains intermediate luminance and chromaticity values ​​based on the initial grayscale values ​​and a first preset adjustment value, and calculates the luminance and chromaticity influence weight based on the initial luminance and chromaticity values, the intermediate luminance and chromaticity values, and the first preset adjustment value; then, it obtains the target luminance and chromaticity values ​​of the display panel, and obtains a first target grayscale value based on the target luminance and chromaticity values, the luminance and chromaticity influence weight, and the initial luminance and chromaticity values; next, it obtains the first target luminance and chromaticity value corresponding to the first target grayscale value of the display panel, and determines whether the difference between the first target luminance and chromaticity value and the target luminance and chromaticity value is within a preset luminance and chromaticity value range; finally, if the difference between the first target luminance and chromaticity value and the target luminance and chromaticity value is within the preset luminance and chromaticity value range, it assigns the first target grayscale value as the target grayscale value. This application can calculate the luminance and chromaticity influence weight based on the initial luminance and chromaticity values ​​corresponding to the initial grayscale values ​​of the display panel and the intermediate luminance and chromaticity values ​​after adjusting the initial grayscale values ​​by a first preset adjustment value, and then calculate the target grayscale value of the display panel. This eliminates the need for manual adjustment, greatly improving both calibration efficiency and accuracy. Attached Figure Description

[0031] Figure 1 A flowchart of luminance and chromaticity correction for a display panel provided for embodiments of this application;

[0032] Figure 2A flowchart of luminance and chromaticity correction for a display panel provided for embodiments of this application;

[0033] Figure 3 A flowchart of luminance and chromaticity correction for a display panel provided for embodiments of this application;

[0034] Figure 4 A flowchart of luminance and chromaticity correction for a display panel provided for embodiments of this application;

[0035] Figure 5 A flowchart of luminance and chromaticity correction for a display panel provided for embodiments of this application;

[0036] Figure 6 A flowchart of luminance and chromaticity correction for a display panel provided for embodiments of this application;

[0037] Figure 7 This is a structural diagram of a brightness and color correction device for a display panel provided in an embodiment of this application. Detailed Implementation

[0038] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings. The technical solutions described below are for illustrative purposes only and should not be construed as limiting the scope of protection of this application.

[0039] Furthermore, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different technical features. The terms "multiple" and similar words indicate two or more unless otherwise expressly specified.

[0040] The brightness and color correction method and apparatus for display panels proposed in this application are applicable to various display control scenarios. Specifically, the brightness and color correction method and apparatus for display panels proposed in this application are applied to scenarios where brightness and color correction is performed on multiple display panels.

[0041] Please see Figure 1 The luminance and chromaticity correction method includes:

[0042] Step A: Obtain the initial luminance and chromaticity values ​​corresponding to the initial grayscale values ​​of the display panel.

[0043] The luminance and chromaticity values ​​of the display panel can be obtained using a luminance and chromaticity acquisition device. In practical applications, the luminance and chromaticity acquisition device is placed at the measurement point on the front of the display panel, and the display panel is controlled via a control terminal to acquire the luminance and chromaticity values ​​of the displayed image. The control terminal can be a computer or other control device.

[0044] Specifically, in this embodiment of the invention, the luminance and chromaticity values ​​of the current displayed image obtained after controlling the display panel via the control terminal are used as initial luminance and chromaticity values. After obtaining the initial luminance and chromaticity values, the control terminal changes the grayscale values ​​input to the display terminal and controls the display panel to re-display the image. At this time, the obtained luminance and chromaticity values ​​are intermediate luminance and chromaticity values.

[0045] Specifically, when obtaining the initial luminance and chrominance values ​​corresponding to the initial grayscale values ​​of the display panel, the display panel can be controlled to display a white screen. That is, the grayscale values ​​input to the display panel at this time are (R255, G255, B255).

[0046] In some embodiments, please refer to Figure 2 Step A includes:

[0047] Step a1: The control terminal inputs the initial grayscale value to the display panel.

[0048] For example, taking the control of the display panel to display a white screen as an example, the initial grayscale value can be (R255, G255, B255). It should be understood that the initial grayscale value can also be customized, and this invention does not limit it.

[0049] Step a2: Obtain the initial luminance and chromaticity values ​​of the display panel based on the initial grayscale values.

[0050] In this process, after inputting the grayscale values ​​(R255, G255, B255) as the initial grayscale values ​​to the display panel, the luminance and chrominance values ​​of the display panel under a white screen are obtained by a luminance and chrominance acquisition instrument and used as the initial luminance and chrominance values. In practical applications, the initial luminance and chrominance values ​​can be denoted as (X255, Y255, Z255).

[0051] Step B: Obtain the intermediate luminance value based on the initial grayscale value and the first preset adjustment value.

[0052] After obtaining the initial luminance and chromaticity values, the grayscale values ​​input to the display panel are adjusted to obtain new luminance and chromaticity values ​​for the display panel. For example, since the initial grayscale value input to the display panel is set to its maximum value to ensure a white image, the initial grayscale value is then reduced by a first preset adjustment value to obtain an intermediate grayscale value. This intermediate grayscale value is then input to the display panel and acquired by the luminance and chromaticity acquisition device.

[0053] In some embodiments, please refer to Figure 3 The intermediate chromaticity values ​​include a first intermediate chromaticity value, a second intermediate chromaticity value, and a third intermediate chromaticity value; step B includes:

[0054] Step b1: Reduce the input grayscale value corresponding to the red pixel in the initial grayscale value by the first preset adjustment value to obtain the first intermediate grayscale value.

[0055] The initial grayscale value of the display panel is (R255, G255, B255). The input grayscale value R255 corresponding to the red pixel is reduced by a first preset adjustment value to obtain the first intermediate grayscale value (R255-Step, G255, B255).

[0056] Step is the first preset adjustment value.

[0057] Step b2: Obtain the first intermediate luminance value corresponding to the first intermediate grayscale value of the display panel.

[0058] Specifically, after inputting the first intermediate grayscale value (R255-Step, G255, B255) into the display panel, the first intermediate luminance and chrominance value (X_R255-Step, Y_R255-Step, Z_R255-Step) is obtained by the luminance and chrominance acquisition instrument.

[0059] Step b3: Reduce the input grayscale value corresponding to the green pixel in the initial grayscale value by the first preset adjustment value to obtain the second intermediate grayscale value.

[0060] The initial grayscale value of the display panel is (R255, G255, B255). The input grayscale value G255 corresponding to the green pixel is reduced by a first preset adjustment value to obtain the second intermediate grayscale value (R255, G255-Step, B255).

[0061] Step is the first preset adjustment value.

[0062] Step b4: Obtain the second intermediate luminance value corresponding to the second intermediate grayscale value of the display panel.

[0063] Specifically, after inputting the second intermediate grayscale value (R255, G255-Step, B255) into the display panel, the second intermediate luminance and chrominance value (X_G255-Step, Y_G255-Step, Z_G255-Step) is obtained through the luminance and chrominance acquisition instrument.

[0064] Step b5: Reduce the input grayscale value corresponding to the blue pixel in the initial grayscale value by the first preset adjustment value to obtain the third intermediate grayscale value.

[0065] The initial grayscale value of the display panel is (R255, G255, B255). The input grayscale value B255 corresponding to the blue pixel is reduced by a first preset adjustment value to obtain the third intermediate grayscale value (R255, G255, B255-Step).

[0066] Step is the first preset adjustment value.

[0067] Step b6: Obtain the third intermediate luminance value corresponding to the third intermediate grayscale value of the display panel.

[0068] Specifically, after inputting the third intermediate grayscale value (R255, G255-Step, B255) into the display panel, the third intermediate luminance and chrominance value (X_B255-Step, Y_B255-Step, Z_B255-Step) is obtained through the luminance and chrominance acquisition instrument.

[0069] Step C: Calculate the luminance influence weight based on the initial luminance value, the intermediate luminance value, and the first preset adjustment value.

[0070] The magnitude of the luminance / chroma influence weight is used to represent the degree of influence on luminance / chroma. The larger the luminance / chroma influence weight value, the greater the degree of influence on luminance / chroma.

[0071] The brightness and chromaticity influence weights include the influence weights of red pixels, green pixels, and blue pixels.

[0072] Specifically, the red pixel influence weight refers to the influence weight of the grayscale value input to the red pixel on the brightness and color saturation of the display panel; the green pixel influence weight refers to the influence weight of the grayscale value input to the green pixel on the brightness and color saturation of the display panel; and the blue pixel influence weight refers to the influence weight of the grayscale value input to the blue pixel on the brightness and color saturation of the display panel.

[0073] In some embodiments, please refer to Figure 4 Step C includes:

[0074] Step c1: Calculate the influence weight of the red pixel grayscale on the brightness and chromaticity based on the initial brightness and chromaticity value, the first intermediate brightness and chromaticity value, and the first preset adjustment value.

[0075] Specifically, the grayscale values ​​input to the green and blue pixels are kept constant, while the grayscale values ​​input to the red pixels are changed to calculate the influence weight of the red pixel grayscale on the brightness and chromaticity.

[0076] Specifically, after reducing the input grayscale value R255 corresponding to the red pixel by a preset grayscale value, a first intermediate grayscale value (R255-Step, G255, B255) is obtained. Then, a first intermediate luminance value (X_R255-Step, Y_R255-Step, Z_R255-Step) is obtained based on the first intermediate grayscale value. The influence weight of the red pixel grayscale on the luminance is calculated based on the initial luminance value, the first intermediate luminance value (X_R255-Step, Y_R255-Step, Z_R255-Step), and the first preset adjustment value.

[0077] In some embodiments, step c1 includes: calculating a first difference, a second difference, and a third difference based on the first initial chromaticity value, the second initial chromaticity value, the third initial chromaticity value, and the first intermediate chromaticity value; and calculating the influence weight of red pixel grayscale on the first sub-chromaticity, the influence weight of red pixel grayscale on the second sub-chromaticity, and the influence weight of red pixel grayscale on the third sub-chromaticity based on the first difference, the second difference, the third difference, and the first preset adjustment value.

[0078] Specifically, after inputting the grayscale values ​​(R255, G255, B255) as initial grayscale values ​​into the display panel, the initial luminance and chrominance values ​​(X255, Y255, Z255) of the display panel are obtained. Among them, X255 is the first initial luminance and chrominance value, Y255 is the second initial luminance and chrominance value, and Z255 is the third initial luminance and chrominance value.

[0079] Specifically, the first difference is Xdr = X255 - X_R255 - Step; the second difference is Ydr = Y255 - Y_R255 - Step; and the third difference is Zdr = Z255 - Z_R255 - Step.

[0080] Specifically, the influence weight of the red pixel grayscale on the first sub-luminance color is: Xdr1 = (X255 - X_R255 - Step) / Step; the influence weight of the red pixel grayscale on the second sub-luminance color is: Ydr1 = (Y255 - Y_R255 - Step) / Step; and the influence weight of the red pixel grayscale on the third sub-luminance color is: Zdr1 = (Z255 - Z_R255 - Step) / Step.

[0081] Wherein, X_R255-Step is the first sub-value of the first intermediate brightness chromaticity value obtained by reducing the input grayscale value R255 corresponding to the red pixel by the first preset adjustment value, Y_R255-Step is the second sub-value of the first intermediate brightness chromaticity value obtained by reducing the input grayscale value R255 corresponding to the red pixel by the first preset adjustment value, and Z_R255-Step is the third sub-value of the first intermediate brightness chromaticity value obtained by reducing the input grayscale value R255 corresponding to the red pixel by the first preset adjustment value.

[0082] The luminance and chrominance values ​​of any grayscale level of the display panel are (X,Y,Z), where X is the first sub-luminance and chrominance, Y is the second sub-luminance and chrominance, and Z is the third sub-luminance and chrominance.

[0083] Step c2: Calculate the influence weight of the green pixel grayscale on the brightness and chromaticity based on the initial brightness and chromaticity value, the second intermediate brightness and chromaticity value, and the first preset adjustment value.

[0084] Specifically, the grayscale values ​​input to the red pixel and the blue pixel are kept constant, while the grayscale value input to the green pixel is changed to calculate the influence weight of the green pixel grayscale on the brightness and chromaticity.

[0085] Specifically, after reducing the input grayscale value R255 corresponding to the green pixel by a first preset adjustment value, a second intermediate grayscale value (R255, G255-Step, B255) is obtained. Then, a second intermediate luminance value (X_G255-Step, Y_G255-Step, Z_G255-Step) is obtained based on the second intermediate grayscale value. The influence weight of the green pixel grayscale on the luminance is calculated based on the initial luminance value, the second intermediate luminance value (X_G255-Step, Y_G255-Step, Z_G255-Step), and the first preset adjustment value.

[0086] In some embodiments, step c2 includes: calculating a fourth difference, a fifth difference, and a sixth difference based on the first initial luminance value, the second initial luminance value, the third initial luminance value, and the second intermediate luminance value; and calculating the influence weight of green pixel grayscale on the first sub-luminance value, the influence weight of green pixel grayscale on the second sub-luminance value, and the influence weight of green pixel grayscale on the third sub-luminance value based on the fourth difference, the fifth difference, the sixth difference, and the first preset adjustment value.

[0087] Specifically, after inputting the grayscale values ​​(R255, G255, B255) as initial grayscale values ​​into the display panel, the initial luminance and chrominance values ​​(X255, Y255, Z255) of the display panel are obtained. Among them, X255 is the first initial luminance and chrominance value, Y255 is the second initial luminance and chrominance value, and Z255 is the third initial luminance and chrominance value.

[0088] Specifically, the fourth difference is: Xdg = X255 - X_G255 - Step; the fifth difference is: Ydg = Y255 - Y_G255 - Step; and the sixth difference is: Zdg = Z255 - Z_G255 - Step.

[0089] Specifically, the influence weight of the green pixel grayscale on the first sub-luminance color is: Xdg1 = (X255 - X_G255 - Step) / Step; the influence weight of the green pixel grayscale on the second sub-luminance color is: Ydg1 = (Y255 - Y_G255 - Step) / Step; and the influence weight of the green pixel grayscale on the third sub-luminance color is: Zdg1 = (Z255 - Z_G255 - Step) / Step.

[0090] Wherein, X_G255-Step is the first sub-value of the second intermediate luminance value obtained by reducing the input grayscale value G255 corresponding to the green pixel by the first preset adjustment value, Y_G255-Step is the second sub-value of the second intermediate luminance value obtained by reducing the input grayscale value G255 corresponding to the green pixel by the first preset adjustment value, and Z_G255-Step is the third sub-value of the second intermediate luminance value obtained by reducing the input grayscale value G255 corresponding to the green pixel by the first preset adjustment value.

[0091] The luminance and chromaticity values ​​of any grayscale level on the display panel are (X,Y,Z), where X is the first sub-luminance and chromaticity, Y is the second sub-luminance and chromaticity, and Z is the third sub-luminance and chromaticity.

[0092] Step c3: Calculate the influence weight of the blue pixel grayscale on the brightness and chromaticity based on the initial brightness and chromaticity value, the third intermediate brightness and chromaticity value, and the first preset adjustment value.

[0093] Specifically, the grayscale values ​​input to the green pixel and the red pixel are kept constant, while the grayscale value input to the blue pixel is changed to calculate the influence weight of the blue pixel grayscale on the brightness and chromaticity.

[0094] Specifically, after reducing the input grayscale value R255 corresponding to the blue pixel by a preset grayscale value, a third intermediate grayscale value (R255, G255, B255-Step) is obtained. Then, a third intermediate luminance value (X_B255-Step, Y_B255-Step, Z_B255-Step) is obtained based on the third intermediate grayscale value. The influence weight of the blue pixel grayscale on the luminance is calculated based on the initial luminance value, the third intermediate luminance value (X_B255-Step, Y_B255-Step, Z_B255-Step), and the first preset adjustment value.

[0095] In some embodiments, step c3 includes: calculating a seventh difference, an eighth difference, and a ninth difference based on the first initial luminance value, the second initial luminance value, the third initial luminance value, and the third intermediate luminance value; and calculating the influence weight of blue pixel grayscale on the first sub-luminance value, the influence weight of blue pixel grayscale on the second sub-luminance value, and the influence weight of blue pixel grayscale on the third sub-luminance value based on the seventh difference, the eighth difference, the ninth difference, and the first preset adjustment value.

[0096] Specifically, after inputting the grayscale values ​​(R255, G255, B255) as initial grayscale values ​​into the display panel, the initial luminance and chrominance values ​​(X255, Y255, Z255) of the display panel are obtained. Among them, X255 is the first initial luminance and chrominance value, Y255 is the second initial luminance and chrominance value, and Z255 is the third initial luminance and chrominance value.

[0097] Specifically, the seventh difference is: Xdr = X255 - X_B255 - Step; the eighth difference is: Ydr = Y255 - Y_B255 - Step; and the ninth difference is: Zdr = Z255 - Z_B255 - Step.

[0098] Specifically, the influence weight of the blue pixel grayscale on the first sub-luminance color is: Xdr1 = (X255 - X_B255 - Step) / Step; the influence weight of the blue pixel grayscale on the second sub-luminance color is: Ydr1 = (Y255 - Y_B255 - Step) / Step; and the influence weight of the blue pixel grayscale on the third sub-luminance color is: Zdr1 = (Z255 - Z_B255 - Step) / Step.

[0099] Wherein, X_B255-Step is the first sub-value of the first intermediate luminance chromaticity value obtained by reducing the input grayscale value B255 corresponding to the blue pixel by the first preset adjustment value, Y_B255-Step is the second sub-value of the first intermediate luminance chromaticity value obtained by reducing the input grayscale value B255 corresponding to the blue pixel by the first preset adjustment value, and Z_B255-Step is the third sub-value of the first intermediate luminance chromaticity value obtained by reducing the input grayscale value B255 corresponding to the blue pixel by the first preset adjustment value.

[0100] The luminance and chromaticity values ​​of any grayscale level on the display panel are (X,Y,Z), where X is the first sub-luminance and chromaticity, Y is the second sub-luminance and chromaticity, and Z is the third sub-luminance and chromaticity.

[0101] Step D: Obtain the target luminance and chromaticity values ​​of the display panel.

[0102] The target chromaticity value can be a pre-set chromaticity value.

[0103] Step E: Obtain the first target grayscale value based on the target chromaticity value, the chromaticity influence weight, and the initial chromaticity value.

[0104] In some embodiments, please refer to Figure 5 Step E includes:

[0105] Step e1: Calculate the luminance difference between the target luminance value and the initial luminance value.

[0106] The target luminance and chromaticity values ​​are denoted as (XTarget, YTarget, ZTarget), and the initial luminance and chromaticity values ​​are denoted as (X255, Y255, Z255). The difference between (XTarget, YTarget, ZTarget) and (X255, Y255, Z255) is calculated.

[0107] Specifically, the brightness and chromaticity differences include the first brightness and chromaticity difference X255-Xtarget, the second brightness and chromaticity difference Y255-Ytarget, and the third brightness and chromaticity difference Z255-Ztarget.

[0108] Step e2: Calculate the first target grayscale value based on the brightness and chromaticity influence weights and the brightness and chromaticity difference.

[0109] Once the chromaticity difference and chromaticity influence weight are obtained, the first target grayscale value can be calculated based on the chromaticity difference and chromaticity influence weight.

[0110] Specifically, the grayscale values ​​of the first target (RTarget1, GTarget1, BTarget1) are calculated according to the following formula:

[0111] Xdr1*RTarget1+Xdg1*GTarget1+Xdb1*BTarget1=X255-XTarget;

[0112] Ydr1*RTarget1+Ydg1*GTarget1+Ydb1*BTarget1=Y255-YTarget;

[0113] Zdr1*RTarget1+Zdg1*GTarget1+Zdb1*BTarget1=Z255-ZTarget;

[0114] Among them, the influence weight of the red pixel grayscale on the first sub-brightness color is Xdr1, the influence weight of the red pixel grayscale on the second sub-brightness color is Ydr1, and the influence weight of the red pixel grayscale on the third sub-brightness color is Zdr1.

[0115] Among them, the influence weight of green pixel grayscale on the first sub-brightness color is Xdg1, the influence weight of green pixel grayscale on the second sub-brightness color is Ydg1, and the influence weight of green pixel grayscale on the third sub-brightness color is Zdg1.

[0116] Among them, the influence weight of the blue pixel grayscale on the first sub-luminance color is Xdb1, the influence weight of the blue pixel grayscale on the second sub-luminance color is Ydb1, and the influence weight of the blue pixel grayscale on the third sub-luminance color is Zdb1.

[0117] Among them, the first difference in luminance and chromaticity is X255-Xtarget, the second difference in luminance and chromaticity is Y255-Ytarget, and the third difference in luminance and chromaticity is Z255-Ztarget.

[0118] Step F: Obtain the first target luminance and chromaticity value corresponding to the first target grayscale value of the display panel.

[0119] Specifically, after the control terminal inputs the first target grayscale value (RTarget1, GTarget1, BTarget1) to the display panel, it obtains the first target luminance and chrominance value corresponding to the first target grayscale value on the display panel through the luminance and chrominance acquisition instrument.

[0120] Step G: Determine whether the difference between the first target chromaticity value and the target chromaticity value is within the preset chromaticity value range.

[0121] Specifically, after obtaining the first target luminance and chromaticity value corresponding to the first target grayscale value of the display panel, the difference between the first target luminance and chromaticity value and the target luminance and chromaticity value is calculated, and it is determined whether the difference between the first target luminance and chromaticity value and the target luminance and chromaticity value is within a preset luminance and chromaticity value range. If the difference between the first target luminance and chromaticity value and the target luminance and chromaticity value is within the preset luminance and chromaticity value range, then step H is executed.

[0122] Step H: When the difference between the first target chromaticity value and the target chromaticity value is within the preset chromaticity value range, the first target grayscale value is assigned the target grayscale value.

[0123] Specifically, the first target grayscale value is assigned as the target grayscale value so that the difference between the luminance and chrominance values ​​of the display panel and the target luminance and chrominance values ​​is less than or equal to the preset luminance and chrominance value.

[0124] This application first obtains the initial luminance and chromaticity values ​​corresponding to the initial grayscale value of the display panel, and obtains intermediate luminance and chromaticity values ​​based on the initial grayscale value and a first preset adjustment value, and calculates the luminance and chromaticity influence weight based on the initial luminance and chromaticity value, the intermediate luminance and chromaticity value, and the first preset adjustment value; then, it obtains the target luminance and chromaticity value of the display panel, and obtains a first target grayscale value based on the target luminance and chromaticity value, the luminance and chromaticity influence weight, and the initial luminance and chromaticity value; next, it obtains the first target luminance and chromaticity value corresponding to the first target grayscale value of the display panel, and checks whether the difference between the first target luminance and chromaticity value and the target luminance and chromaticity value is within a preset luminance and chromaticity value range; finally, if the difference between the first target luminance and chromaticity value and the target luminance and chromaticity value is within the preset luminance and chromaticity value range, it assigns the first target grayscale value as the target grayscale value. This application can calculate the luminance and chromaticity influence weight based on the initial luminance and chromaticity values ​​corresponding to the initial grayscale values ​​of the display panel and the intermediate luminance and chromaticity values ​​after adjusting the initial grayscale values ​​by a first preset adjustment value, and then calculate the target grayscale value of the display panel. This eliminates the need for manual adjustment, greatly improving both calibration efficiency and accuracy.

[0125] In some embodiments, please refer to Figure 6 The luminance correction method further includes:

[0126] Step 1: If the difference between the first target chromaticity value and the target chromaticity value is not within the preset chromaticity value range, calculate the second target grayscale value based on the first target grayscale value and the second preset adjustment value.

[0127] Step I includes: increasing or decreasing the first target grayscale value by the second preset adjustment value to obtain the second target grayscale value.

[0128] Specifically, if the difference between the first target chromaticity value and the target chromaticity value is not within the preset chromaticity value range, it is determined whether the difference between the first target chromaticity value and the target chromaticity value is greater than 0; if the difference between the first target chromaticity value and the target chromaticity value is greater than 0, the first target grayscale value is increased by the second preset adjustment value to obtain the second target grayscale value; if the difference between the first target chromaticity value and the target chromaticity value is not greater than 0, the first target grayscale value is decreased by the second preset adjustment value to obtain the second target grayscale value.

[0129] Step J: Assign the second target grayscale value to the first target grayscale value.

[0130] Repeat steps F, G, and H, or repeat steps F, G, I, and J.

[0131] Specifically, after assigning the second target grayscale value to the first target grayscale value, step F (obtaining the first target luminance / chromaticity value corresponding to the first target grayscale value of the display panel) is executed again; then step G (determining whether the difference between the first target luminance / chromaticity value and the target luminance / chromaticity value is less than or equal to a preset luminance / chromaticity value) is executed; finally, if the difference between the first target luminance / chromaticity value and the target luminance / chromaticity value is less than or equal to the preset luminance / chromaticity value, the first target grayscale value is assigned to the target grayscale value; if the difference between the first target luminance / chromaticity value and the target luminance / chromaticity value is greater than the preset luminance / chromaticity value, the second target grayscale value is calculated based on the first target grayscale value and the second preset adjustment value, and step F is executed again until the difference between the first target luminance / chromaticity value and the target luminance / chromaticity value is greater than the preset luminance / chromaticity value.

[0132] The above is a description of the brightness and color correction method for the display panel proposed in this application.

[0133] In some embodiments, please refer to Figure 7 A luminance and chromaticity correction device for a display panel, the luminance and chromaticity correction device comprising:

[0134] A luminance / chromaticity value acquisition module 701 is used to acquire the initial luminance / chromaticity value corresponding to the initial grayscale value of the display panel, and to acquire an intermediate luminance / chromaticity value based on the initial grayscale value and a first preset adjustment value; and

[0135] The calculation module 702 is used to calculate the luminance influence weight based on the initial luminance value, the intermediate luminance value and the first preset adjustment value, and to obtain a first target grayscale value based on the luminance influence weight, the initial luminance value and the target luminance value obtained by the luminance correction device.

[0136] The luminance and chromaticity value acquisition module 701 is further configured to acquire the first target luminance and chromaticity value corresponding to the first target grayscale value of the display panel;

[0137] The brightness and chromaticity correction device also includes:

[0138] The judgment module 703 is used to determine whether the difference between the first target chromaticity value and the target chromaticity value is within a preset chromaticity value range; and

[0139] The assignment module 704 is used to assign the first target grayscale value as the target grayscale value when the difference between the first target chromaticity value and the target chromaticity value is within a preset chromaticity value range.

[0140] This application first obtains the initial luminance and chromaticity values ​​corresponding to the initial grayscale values ​​of the display panel through the luminance and chromaticity value acquisition module 701, and obtains intermediate luminance and chromaticity values ​​based on the initial grayscale values ​​and a first preset adjustment value. Then, the calculation module 702 calculates the luminance and chromaticity influence weight based on the initial luminance and chromaticity values, the intermediate luminance and chromaticity values, and the first preset adjustment value. Next, the calculation module 702 obtains a first target grayscale value based on the target luminance and chromaticity value obtained by the luminance and chromaticity correction device, the luminance and chromaticity influence weight, and the initial luminance and chromaticity value. Then, the luminance and chromaticity value acquisition module 701 obtains the first target luminance and chromaticity value corresponding to the first target grayscale value of the display panel, and the judgment module 703 determines whether the difference between the first target luminance and chromaticity value and the target luminance and chromaticity value is within a preset luminance and chromaticity value range. Finally, the assignment module 704 assigns the first target grayscale value as the target grayscale value if the difference between the first target luminance and chromaticity value and the target luminance and chromaticity value is within the preset luminance and chromaticity value range. This application can calculate the luminance and chromaticity influence weight based on the initial luminance and chromaticity values ​​corresponding to the initial grayscale values ​​of the display panel and the intermediate luminance and chromaticity values ​​after adjusting the initial grayscale values ​​by a first preset adjustment value, and then calculate the target grayscale value of the display panel. This eliminates the need for manual adjustment, greatly improving both calibration efficiency and accuracy.

[0141] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for luminance and chromaticity correction of a display panel, characterized in that, The luminance correction method includes: Step A: Obtain the initial luminance and chrominance values ​​corresponding to the initial grayscale values ​​of the display panel; Step B: Obtain the intermediate luminance value based on the initial grayscale value and the first preset adjustment value; Step C: Calculate the luminance influence weight based on the initial luminance value, the intermediate luminance value, and the first preset adjustment value; Step D: Obtain the target luminance and chromaticity values ​​of the display panel; Step E: Obtain the first target grayscale value based on the target chromaticity value, the chromaticity influence weight, and the initial chromaticity value; Step F: Obtain the first target luminance and chromaticity values ​​corresponding to the first target grayscale value on the display panel; Step G: Determine whether the difference between the first target chromaticity value and the target chromaticity value is within the preset chromaticity value range; Step H: When the difference between the first target chromaticity value and the target chromaticity value is within the preset chromaticity value range, the first target grayscale value is assigned the target grayscale value.

2. The luminance and chromaticity correction method according to claim 1, characterized in that, The luminance correction method further includes: Step 1: If the difference between the first target luminance value and the target luminance value is not within the preset luminance value range, calculate the second target grayscale value based on the first target grayscale value and the second preset adjustment value. Step J: Assign the second target grayscale value to the first target grayscale value; Repeat steps F, G, and H, or repeat steps F, G, I, and J.

3. The luminance and chromaticity correction method according to claim 2, characterized in that, Step I includes: The second target grayscale value is obtained by increasing or decreasing the first target grayscale value by the second preset adjustment value.

4. The luminance and chromaticity correction method according to claim 1, characterized in that, Step E includes: Step e1: Calculate the luminance difference between the target luminance value and the initial luminance value; Step e2: Calculate the first target grayscale value based on the brightness and chromaticity influence weights and the brightness and chromaticity difference.

5. The luminance and chromaticity correction method according to claim 1, characterized in that, The intermediate chromaticity values ​​include a first intermediate chromaticity value, a second intermediate chromaticity value, and a third intermediate chromaticity value; Step B includes: Step b1: Reduce the input grayscale value corresponding to the red pixel in the initial grayscale value by the first preset adjustment value to obtain the first intermediate grayscale value; Step b2: Obtain the first intermediate luminance value corresponding to the first intermediate grayscale value of the display panel; Step b3: Reduce the input grayscale value corresponding to the green pixel in the initial grayscale value by the first preset adjustment value to obtain the second intermediate grayscale value; Step b4: Obtain the second intermediate luminance value corresponding to the second intermediate grayscale value of the display panel; Step b5: Reduce the input grayscale value corresponding to the blue pixel in the initial grayscale value by the first preset adjustment value to obtain the third intermediate grayscale value; Step b6: Obtain the third intermediate luminance value corresponding to the third intermediate grayscale value of the display panel.

6. The luminance and chromaticity correction method according to claim 5, characterized in that, The brightness and chromaticity influence weights include the influence weights of red pixel grayscale on brightness and chromaticity, green pixel grayscale on brightness and chromaticity, and blue pixel grayscale on brightness and chromaticity. Step C includes: Step c1: Calculate the influence weight of the red pixel grayscale on the brightness and chromaticity based on the initial brightness and chromaticity value, the first intermediate brightness and chromaticity value, and the first preset adjustment value; Step c2: Calculate the influence weight of the green pixel grayscale on the brightness and chromaticity based on the initial brightness and chromaticity value, the second intermediate brightness and chromaticity value, and the first preset adjustment value; Step c3: Calculate the influence weight of the blue pixel grayscale on the brightness and chromaticity based on the initial brightness and chromaticity value, the third intermediate brightness and chromaticity value, and the first preset adjustment value.

7. The luminance and chromaticity correction method according to claim 6, characterized in that, Step c1 includes: Calculate the first difference, the second difference, and the third difference based on the first initial luminance and chromaticity value, the second initial luminance and chromaticity value, the third initial luminance and chromaticity value, and the first intermediate luminance and chromaticity value; The influence weights of red pixel grayscale on the first sub-brightness chromaticity, the second sub-brightness chromaticity, and the third sub-brightness chromaticity are calculated based on the first difference, the second difference, the third difference, and the first preset adjustment value.

8. The luminance and chromaticity correction method according to claim 6, characterized in that, Step c2 includes: Calculate the fourth difference, the fifth difference, and the sixth difference based on the first initial luminance value, the second initial luminance value, the third initial luminance value, and the second intermediate luminance value; The influence weights of green pixel grayscale on the first sub-brightness chromaticity, the influence weights of green pixel grayscale on the second sub-brightness chromaticity, and the influence weights of green pixel grayscale on the third sub-brightness chromaticity are calculated based on the fourth difference, the fifth difference, the sixth difference, and the first preset adjustment value.

9. The luminance and chromaticity correction method according to claim 6, characterized in that, Step c3 includes: The seventh difference, the eighth difference, and the ninth difference are calculated based on the first initial luminance value, the second initial luminance value, the third initial luminance value, and the third intermediate luminance value. The influence weights of blue pixel grayscale on the first sub-brightness chromaticity, the influence weights of blue pixel grayscale on the second sub-brightness chromaticity, and the influence weights of blue pixel grayscale on the third sub-brightness chromaticity are calculated based on the seventh difference, the eighth difference, the ninth difference, and the first preset adjustment value.

10. A luminance and chromaticity correction device for a display panel, characterized in that, The brightness and chromaticity correction device includes: A luminance / chromaticity value acquisition module is used to acquire the initial luminance / chromaticity value corresponding to the initial grayscale value of the display panel, and to acquire an intermediate luminance / chromaticity value based on the initial grayscale value and a first preset adjustment value; and The calculation module is used to calculate the luminance influence weight based on the initial luminance value, the intermediate luminance value and the first preset adjustment value, and to obtain the first target grayscale value based on the luminance influence weight, the initial luminance value and the target luminance value obtained by the luminance correction device. The luminance and chromaticity value acquisition module is further configured to acquire the first target luminance and chromaticity value corresponding to the first target grayscale value of the display panel; The brightness and chromaticity correction device also includes: The judgment module is used to determine whether the difference between the first target chromaticity value and the target chromaticity value is within a preset chromaticity value range; and The assignment module is used to assign the first target grayscale value as the target grayscale value when the difference between the first target chromaticity value and the target chromaticity value is within a preset chromaticity value range.

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