Grayscale debugging method for display panel and display panel

Abstract

The present application discloses a grayscale debugging method for a display panel and a display panel. In the grayscale debugging method for a display panel, first, the reference brightness corresponding to the original grayscale is obtained according to the initial high grayscale and initial low grayscale corresponding to the original grayscale; a target grayscale arrangement mode is set, and an initial data set is obtained according to the target grayscale arrangement mode; then, the initial data set is screened according to the high grayscale threshold, the initial high grayscale, and the initial low grayscale to obtain a preliminary data set; the weight of the preset brightness corresponding to each original grayscale in the preliminary data set is calculated according to the orthographic weight and the reference brightness; finally, corresponding to the same original grayscale, a set of grayscale data corresponding to the preset brightness with the smallest weight is selected as the target high grayscale and target low grayscale of the original grayscale. The present application can increase the viewing angle of the display panel, improve the viewing angle defect, and enhance the display effect.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a grayscale debugging method for a display panel and a display panel. Background Art

[0002] LCDs (liquid crystal displays) typically use a light transmission mechanism. When light passes through the liquid crystals at a near-perpendicular angle and exits forward, optimal viewing is achieved when viewed straight on. As the viewing angle changes, the angle at which light enters the eye also changes, causing the displayed image to appear white and distorted (colorwash). When the viewing angle exceeds the critical angle, the displayed content becomes invisible to the human eye.

[0003] However, with the development of display technology, the application scenarios of large-size products are becoming increasingly extensive. For large-size display panels, the problem of viewing angle defects is inevitable. Therefore, how to increase the viewing angle of display panels and improve viewing angle defects is a technical problem that needs to be solved urgently. Summary of the Invention

[0004] The present application provides a grayscale debugging method for a display panel and a display panel, so as to increase the viewing angle of the display panel, improve the viewing angle defect, and enhance the display effect.

[0005] The present application provides a grayscale debugging method for a display panel, comprising:

[0006] S1, obtaining an initial high grayscale and an initial low grayscale corresponding to a plurality of original grayscales;

[0007] S2. Obtaining reference brightness corresponding to a plurality of original grayscales according to the initial high grayscale and the initial low grayscale;

[0008] S3. Setting a target grayscale arrangement and acquiring an initial data set according to the target grayscale arrangement; the initial data set including multiple sets of grayscale data corresponding to each of the original grayscales and a preset brightness corresponding to each set of the grayscale data, each set of the grayscale data including a preset high grayscale and a preset low grayscale;

[0009] S4, selecting at least part of the original grayscales as binding point grayscales, and setting a high grayscale threshold and a normal view weight corresponding to each binding point grayscale;

[0010] S5, screening the initial data set according to the high grayscale threshold, the initial high grayscale, and the initial low grayscale to obtain a preliminary data set;

[0011] S6. Calculating the weight of the preset brightness corresponding to each original grayscale in the prepared data set according to the emmetropia weight and the reference brightness;

[0012] S7. For the same original grayscale, select a group of grayscale data corresponding to the preset brightness with the smallest weight as a target high grayscale and a target low grayscale of the original grayscale.

[0013] Optionally, in some embodiments of the present application, step S1 includes:

[0014] The initial high grayscale and the initial low grayscale corresponding to each original grayscale are obtained according to the front-view gamma curve and the side-view gamma curve of each color sub-pixel of the display panel.

[0015] Optionally, in some embodiments of the present application, step S5 includes:

[0016] The multiple groups of grayscale data corresponding to each of the original grayscales are compared with the initial high grayscale and the initial low grayscale respectively; if the preset high grayscale in the same grayscale data is greater than the initial high grayscale, the difference between the preset high grayscale and the initial high grayscale is less than the high grayscale threshold, and the preset low grayscale is less than the initial low grayscale, then the grayscale data is retained in the prepared data set; otherwise, the grayscale data is screened out.

[0017] Optionally, in some embodiments of the present application, the reference brightness includes a front view reference brightness and a side view reference brightness, and the preset brightness includes a front view preset brightness and a side view preset brightness. In step S6, the weight of the preset brightness is calculated as follows: K=a*|L3-L1|+(1-a)*|L4-L2|;

[0018] Among them, K represents the weight of the preset brightness, a represents the front view weight, L3 represents the front view preset brightness, L1 represents the front view reference brightness, L4 represents the side view preset brightness, and L3 represents the side view reference brightness.

[0019] Optionally, in some embodiments of the present application, the binding point grayscale includes a first binding point grayscale and a second binding point grayscale, the second binding point grayscale is greater than the first binding point grayscale, and the high grayscale threshold corresponding to the second binding point grayscale is greater than the high grayscale threshold corresponding to the first binding point grayscale.

[0020] Optionally, in some embodiments of the present application, step S4 further includes:

[0021] The high grayscale threshold and the front-view weight corresponding to the original grayscale except the binding point grayscale are obtained by using the interpolation principle.

[0022] Optionally, in some embodiments of the present application, step S7 further includes:

[0023] A first preset grayscale is set. If the Nth original grayscale is greater than the first preset grayscale, the target high grayscale corresponding to the Nth original grayscale is greater than the target high grayscale corresponding to the N-1th original grayscale, and is less than the target high grayscale corresponding to the N-1th original grayscale plus one, wherein the difference between the grayscale value of the Nth original grayscale and the grayscale value of the N-1th original grayscale is one.

[0024] Optionally, in some embodiments of the present application, the first preset grayscale is greater than or equal to 150.

[0025] Optionally, in some embodiments of the present application, step S7 further includes:

[0026] A second preset grayscale is set. If the Nth original grayscale is greater than the second preset grayscale, the range of the target low grayscale corresponding to the Nth original grayscale is greater than the target low grayscale corresponding to the N-1th original grayscale, and is less than the highest grayscale among the multiple original grayscales.

[0027] Optionally, in some embodiments of the present application, step S1 further includes:

[0028] The initial high grayscale and the initial low grayscale corresponding to the original grayscale are corrected so that the initial high grayscale corresponding to each original grayscale is greater than the initial low grayscale.

[0029] Optionally, in some embodiments of the present application, in the target grayscale arrangement, the ratio of the number of sub-pixels in the display panel that display at the preset high grayscale to the number of sub-pixels that display at the preset low grayscale is 1:1, 1:2 or 1:3.

[0030] Correspondingly, the present application also provides a display panel, which adopts the grayscale debugging method of the display panel as described in any one of the above items to obtain a target high grayscale and a target low grayscale corresponding to the original grayscale.

[0031] The present application provides a grayscale debugging method for a display panel and a display panel. The grayscale debugging method for a display panel includes: S1, obtaining an initial high grayscale and an initial low grayscale corresponding to a plurality of original grayscales; S2, obtaining a plurality of reference brightnesses corresponding to the original grayscales based on the initial high grayscales and the initial low grayscales; S3, setting a target grayscale arrangement mode, and obtaining an initial data set based on the target grayscale arrangement mode; the initial data set includes a plurality of sets of grayscale data corresponding to each of the original grayscales and a preset brightness corresponding to each set of the grayscale data, wherein each set of the grayscale data includes a preset high grayscale and a preset low grayscale; S4. Select at least part of the original grayscale as the binding point grayscale, and set a high grayscale threshold and a normal view weight corresponding to each of the binding point grayscales; S5. Filter the initial data set according to the high grayscale threshold, the initial high grayscale and the initial low grayscale to obtain a preliminary data set; S6. Calculate the weight of the preset brightness corresponding to each of the original grayscales in the preliminary data set according to the normal view weight and the reference brightness; S7. For the same original grayscale, select a group of the grayscale data corresponding to the preset brightness with the smallest weight as the target high grayscale and target low grayscale of the original grayscale. Through the above-mentioned grayscale debugging method, the present application can obtain the target high grayscale and target low grayscale corresponding to the original grayscale according to the initial high grayscale and initial low grayscale corresponding to the original grayscale under any set target grayscale arrangement mode, thereby increasing the viewing angle of the display panel, improving viewing angle defects, and enhancing the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 is a viewing angle diagram of the display panel provided by this application;

[0034] Figure 2 is a schematic diagram of the gamma curve of the viewing angle compensation front display panel provided in this application;

[0035] Figure 3 This is a structural diagram of a viewing angle compensation front display panel provided by this application;

[0036] Figure 4 This is a schematic structural diagram of a display panel after viewing angle compensation provided by this application;

[0037] Figure 5 is a schematic diagram of the gamma curve of the display panel after viewing angle compensation provided by this application;

[0038] Figure 6 This is a flow chart of the grayscale debugging method for a display panel provided by this application;

[0039] Figure 7 is the normal view gamma curve of the display panel before and after viewing angle compensation provided by this application;

[0040] Figure 8 is a schematic diagram of the target high grayscale and initial high grayscale provided by this application;

[0041] Figure 9 This is a schematic diagram of the target low grayscale and initial low grayscale provided in this application. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0043] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features and should not be construed as limiting this application. Furthermore, the term "plurality" refers to two or more.

[0044] The present application provides a grayscale debugging method for a display panel and a display panel, which are described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments of the present application.

[0045] See also Figure 1 , Figure 1 : is a schematic diagram of the viewing angle of the display panel provided by this application. Among them, the critical angle is called the viewing angle. Figure 1 As shown, θ U and θ D is the vertical viewing angle of the display panel, θ L and θ R The horizontal viewing angle of the display panel. When the viewing angle exceeds the vertical viewing angle or the horizontal viewing angle, the human eye cannot see the display image of the display panel.

[0046] Specifically, viewing angle refers to the viewing angle that meets the visual requirements of a 10:1 contrast ratio and no grayscale inversion. Viewing angle is a key indicator for evaluating display panel performance. Contrast ratio objectively refers to the ratio of the maximum brightness to the minimum brightness of the image displayed by the display panel. Grayscale inversion refers to the subjective brightness of the display panel when displaying low grayscales is higher than when displaying high grayscales.

[0047] After research, it was found that the viewing angle defect problem occurs because the side view gamma curve of the display panel deviates from the front view gamma curve. For details, please refer to Figure 2 , Figure 2 This is a schematic diagram of the gamma curve of the viewing angle compensation front display panel provided in this application.

[0048] Among them, curve P represents the front-view gamma curve, and curve Q represents the side-view gamma curve. Comparing the initial front-view gamma curve P with the initial side-view gamma curve Q, taking the common skin color of Asians as an example, in the display panel, the original grayscale values ​​of the three primary colors RGB measured when viewing the skin color image are R=220, G=150, B=100 respectively; when viewing the skin color image from the side, the original grayscale values ​​of RGB measured are R=215, G=192, B=176 respectively. It can be seen that for the same display image, the original grayscale of RGB changes when viewing from the front and side, and the gamma curve shifts, resulting in color cast and poor side-view display effect.

[0049] To address the aforementioned viewing angle defects, the applicant, in related art, replaced the original grayscales of sub-pixels within the effective display area of ​​a display panel with relatively high and relatively low grayscales. The average brightness of the relatively high and relatively low grayscales is substantially equal to the brightness of the original grayscale. When viewed from the side, the low-grayscale sub-pixels reduce the degree of brightness variation when viewed from the side, improving the side-view display effect.

[0050] For details, see Figure 3-Figure 5 , Figure 3 This is a structural diagram of a viewing angle compensation front display panel provided by this application; Figure 4 This is a schematic structural diagram of a display panel after viewing angle compensation provided by this application; Figure 5 This is a schematic diagram of the gamma curve of the display panel after viewing angle compensation provided in this application.

[0051] Taking the original grayscale 128 as an example, the original grayscale 128 is replaced by the high grayscale 180 and the low grayscale 50. Figure 5As shown in points A, B, C, and D in FIG. y1, y2, and y3 represent the front view luminance corresponding to the original grayscale of 128, the high grayscale of 180, and the low grayscale of 50, respectively, and y4 represents the side view luminance corresponding to the high grayscale of 180. When the original grayscale is replaced by the high and low grayscales, the degree of change in the side view luminance is reduced. Therefore, the side view gamma curve Q, which deviates from the front view gamma curve P, becomes closer to the front view gamma curve P, thereby improving the side view display effect and increasing the viewing angle of the display panel.

[0052] However, for different models or different grayscale arrangements of the same model, the high grayscale and low grayscale corresponding to the same original grayscale may be different. If the same high and low grayscales are used for each original grayscale in different grayscale arrangements of the display panel, the viewing angle improvement effect may be poor. To address this issue, the present application provides a grayscale debugging method for a display panel, which can obtain the target high grayscale and target low grayscale of the original grayscale.

[0053] Specifically, in the grayscale debugging method of the display panel provided in the embodiment of the present application, the initial high grayscale and initial low grayscale corresponding to the multiple original grayscales are first obtained; the reference brightness corresponding to the multiple original grayscales are respectively obtained according to the initial high grayscale and the initial low grayscale; the target grayscale arrangement method is set, and the initial data set is obtained according to the target grayscale arrangement method; the initial data set includes multiple groups of grayscale data corresponding to each original grayscale and the preset brightness corresponding to each group of grayscale data, and each group of grayscale data includes a preset high grayscale and a preset low grayscale; then, at least part of the original grayscales are selected as the binding point grayscales, and the high grayscale threshold and the positive view weight are set corresponding to each binding point grayscale; the initial data set is screened according to the high grayscale threshold, the initial high grayscale and the initial low grayscale to obtain a preliminary data set; the weight of the preset brightness corresponding to each original grayscale in the preliminary data set is calculated according to the positive view weight and the reference brightness; finally, corresponding to the same original grayscale, a group of grayscale data corresponding to the preset brightness with the smallest weight is selected as the target high grayscale and target low grayscale of the original grayscale.

[0054] The embodiment of the present application uses the above-mentioned grayscale debugging method of the display panel. Under any set target grayscale arrangement mode, the target high grayscale and target low grayscale corresponding to the original grayscale can be obtained according to the initial high grayscale and initial low grayscale corresponding to the original grayscale, thereby increasing the viewing angle of the display panel, improving the viewing angle defects, and enhancing the display effect.

[0055] The definitions of the original grayscale, high grayscale and low grayscale can be found in the above embodiments and will not be repeated here.

[0056] The following is a detailed introduction.

[0057] See also Figure 6 , Figure 6This is a flow chart of the grayscale debugging method of the display panel provided by this application. Figure 6 As shown, the grayscale debugging method of the display panel includes the following steps:

[0058] S1, obtaining an initial high grayscale and an initial low grayscale corresponding to a plurality of original grayscales;

[0059] Specifically, each original grayscale corresponds to an initial high grayscale and an initial low grayscale. For the same original grayscale, the initial high grayscale is greater than the initial low grayscale.

[0060] For example, if the image display data input to the display panel is binary 8 bits, 2 8 From the darkest to the brightest brightness. That is, 256 different brightness grayscales are generated (for example, recorded as grayscale 0 to grayscale 255). Then any grayscale from grayscale 0 to grayscale 255 can be called an original grayscale. Each original grayscale corresponds to an initial high grayscale and an initial low display grayscale. Of course, the image display data received by the display panel of the present application can also be binary 6-bit, binary 10-bit, etc.

[0061] In some embodiments of the present application, step S1 may include:

[0062] The initial high grayscale and the initial low grayscale corresponding to each original grayscale are obtained according to the front-view gamma curve and the side-view gamma curve of each color sub-pixel of the display panel.

[0063] For example, a display panel includes sub-pixels in four colors: RGBW (red, green, blue, and white). Each sub-pixel can be tested to obtain a corresponding front-view gamma curve and side-view gamma curve when displayed. The original grayscale is then debugged based on the front-view gamma curve and side-view gamma curve of each color sub-pixel to obtain the initial high grayscale and initial low grayscale corresponding to each original grayscale.

[0064] It should be noted that obtaining the initial high grayscale and initial low grayscale corresponding to the original grayscale based on the front-view gamma curve and the side-view gamma curve is a technique well known to those skilled in the art and will not be described in detail here. Of course, the embodiments of the present application can also obtain the initial high grayscale and initial low grayscale corresponding to each original grayscale based on any related technique, which will not be described in detail here.

[0065] In addition, the display panel may also include RGB sub-pixels, which is not specifically limited in this application.

[0066] In some embodiments of the present application, step S1 may further include:

[0067] The initial high grayscale and the initial low grayscale corresponding to the original grayscale are corrected so that the initial high grayscale corresponding to each original grayscale is greater than the initial low grayscale.

[0068] It is understandable that in some methods of obtaining an initial high grayscale and an initial low grayscale, the initial high grayscale obtained for the same original grayscale may be smaller than the initial low grayscale. When the initial high grayscale corresponding to the same original grayscale is smaller than the initial low grayscale, display distortion may occur.

[0069] Therefore, after obtaining the initial high grayscale and initial low grayscale corresponding to multiple original grayscales, the embodiment of the present application can compare the initial high grayscale and initial low grayscale of each original grayscale. When it is found that the initial high grayscale is smaller than the initial low grayscale, the initial high grayscale or the initial low grayscale is adjusted to ensure that the initial high grayscale of the same original grayscale is greater than the initial low grayscale, so as to avoid display distortion.

[0070] S2. Obtaining reference brightness corresponding to a plurality of original grayscales according to the initial high grayscale and the initial low grayscale;

[0071] For example, when the image display data of the display panel is 8-bit binary, the display panel has 256 original grayscales. For each original grayscale, each sub-pixel in the display panel can be displayed at the initial high grayscale or initial low grayscale corresponding to the original grayscale, and then tested to obtain the reference brightness corresponding to the original grayscale. In other words, the full grayscale display brightness of the display panel is obtained.

[0072] The reference brightness corresponding to each original grayscale includes a front-view reference brightness and a side-view reference brightness.

[0073] Specifically, the brightness data of the display panel may be collected using instruments such as a CA310 color analyzer and a SRUL2 spectroradiometer.

[0074] It should be noted that in some embodiments of the present application, after collecting the reference brightness data of the display panel, the reference brightness data can be normalized. That is, the reference brightness corresponding to each original grayscale is the normalized brightness. This can reduce the complexity of subsequent data processing.

[0075] S3. Setting a target grayscale arrangement and acquiring an initial data set according to the target grayscale arrangement; the initial data set including multiple sets of grayscale data corresponding to each of the original grayscales and a preset brightness corresponding to each set of the grayscale data, each set of the grayscale data including a preset high grayscale and a preset low grayscale;

[0076] The target grayscale arrangement may refer to: a ratio of the number of sub-pixels displayed at high grayscale or low grayscale in the display panel, or an arrangement of sub-pixels displayed at high grayscale or low grayscale in the display panel.

[0077] For example, the ratio of the number of sub-pixels displaying high grayscale or low grayscale in the display panel is different, but the arrangement of the sub-pixels displaying high grayscale or low grayscale is the same. Or the arrangement of the sub-pixels displaying high grayscale or low grayscale in the display panel is different, but the ratio of the number of sub-pixels displaying high grayscale or low grayscale in the display panel is different. In both of these situations, the target grayscale arrangements of the display panels can be considered to be different.

[0078] For example, for sub-pixels of the same color, the ratio of the number of sub-pixels displaying high grayscale to the number of sub-pixels displaying low grayscale can be 1:1, 1:2, 1:3, etc., and this application does not impose any specific restrictions on this. The higher the proportion of low grayscale, the smaller the difference in side view brightness and front view brightness, and the better the viewing angle improvement.

[0079] The same preset low grayscale may include two preset sub-low grayscales, that is, each original grayscale is replaced by one high grayscale and two low grayscales. The same preset low grayscale may also include three preset sub-low grayscales, that is, each original grayscale is replaced by one high grayscale and three low grayscales. This application does not impose any specific limitation on this.

[0080] When the target grayscale arrangement is determined, multiple sets of grayscale data may be set for each original grayscale, and each set of grayscale data includes a preset high grayscale and a preset low grayscale.

[0081] For example, when the original grayscale is 80, in the first set of grayscale data, the preset high grayscale can be set to 120 and the preset low grayscale can be set to 60; in the second set of grayscale data, the preset high grayscale can be set to 120 and the preset low grayscale can be set to 50; in the third set of grayscale data, the preset high grayscale can be set to 140 and the preset low grayscale can be set to 60. By analogy, in one embodiment, if the display panel has 256 original grayscales, then 256*256 sets of grayscale data can be set corresponding to each original grayscale, which will not be described in detail here.

[0082] For example, when the original grayscale is 80, in the first set of grayscale data, the preset high grayscale can be set to 120, and the preset low grayscale includes two preset sub-low grayscales, 50 and 60 respectively; in the second set of grayscale data, the preset high grayscale can be set to 120, and the preset low grayscale can be set to 40 and 30; in the third set of grayscale data, the preset high grayscale can be set to 140, and the preset low grayscale can be set to 50 and 60. They are not described in detail here.

[0083] Then, each sub-pixel in the display panel may be displayed using a set of grayscale data corresponding to the original grayscale, and then a preset brightness corresponding to the set of grayscale data may be obtained through testing.

[0084] Similarly, in some embodiments of the present application, after collecting the preset brightness data of the display panel, the preset brightness data can be normalized. That is, the preset brightness corresponding to each set of grayscale data is the normalized brightness. This can reduce the complexity of subsequent data processing.

[0085] The preset brightness includes a front view preset brightness and a side view preset brightness.

[0086] S4, selecting at least part of the original grayscales as binding point grayscales, and setting a high grayscale threshold and a normal view weight corresponding to each binding point grayscale;

[0087] The high grayscale threshold refers to the maximum difference between the preset high grayscale corresponding to the original grayscale and the original grayscale. For example, if the high grayscale threshold of the original grayscale 0 is 2, then the maximum preset high grayscale corresponding to the original grayscale 0 can only be grayscale 2.

[0088] For example, if the display panel has 256 original grayscales, 33 original grayscales can be selected as the binding point grayscales. Of course, the present application is not limited to this. In some embodiments, 20 original grayscales, 50 original grayscales, 60 original grayscales, etc. can also be selected as the binding point grayscales. It is understood that the greater the number of binding point grayscales, the better the grayscale debugging result of the display panel.

[0089] Each binding point grayscale also corresponds to a side view weight. The sum of the front view weight and the side view weight is 1. The front view weight and the side view weight are designed to balance the shape of the front view gamma curve and the side view gamma curve after grayscale adjustment. This minimizes the deviation of the side view gamma curve from the front view gamma curve while ensuring that the front view gamma curve remains essentially unchanged. If the side view gamma curve is pressed down too much, the front view curve may shift, affecting the front view effect. The larger the front view weight, the smaller the offset of the front view gamma curve before and after grayscale adjustment.

[0090] Normally, the front view weight and the side view weight can be set to 0.5 respectively. Of course, in the embodiment of the present application, the front view weight and the side view weight can also be adjusted according to the grayscale result obtained by the final debugging.

[0091] The high grayscale threshold can be adjusted according to the needs during actual operation.

[0092] In some embodiments of the present application, the binding point grayscale includes a first binding point grayscale and a second binding point grayscale, the second binding point grayscale is greater than the first binding point grayscale, and the high grayscale threshold corresponding to the second binding point grayscale is greater than the high grayscale threshold corresponding to the first binding point grayscale.

[0093] For example, if the high grayscale threshold of the original grayscale 0 is 2, then the threshold range of the original grayscale 1 should be greater than 2. In this way, the high and low grayscale curves corresponding to the original grayscale obtained after grayscale debugging will be smoother and avoid distortion points.

[0094] In some embodiments of the present application, step S4 further includes:

[0095] The high grayscale threshold and the front-view weight corresponding to the original grayscale except the binding point grayscale are obtained by using the interpolation principle.

[0096] It is understandable that in step S4, only a portion of the original grayscales are selected as the binding point grayscales. Therefore, the interpolation principle can be used to obtain the high grayscale thresholds and normal viewing weights corresponding to the original grayscales other than the binding point grayscales. This facilitates the subsequent processing of steps S5-S7 for each original grayscale, improving the accuracy of grayscale debugging.

[0097] S5, screening the initial data set according to the high grayscale threshold, the initial high grayscale, and the initial low grayscale to obtain a preliminary data set;

[0098] Specifically, in some embodiments of the present application, step S5 includes:

[0099] The multiple groups of grayscale data corresponding to each of the original grayscales are compared with the initial high grayscale and the initial low grayscale respectively; if the preset high grayscale in the same grayscale data is greater than the initial high grayscale, the difference between the preset high grayscale and the initial high grayscale is less than the high grayscale threshold, and the preset low grayscale is less than the initial low grayscale, then the grayscale data is retained in the prepared data set; otherwise, the grayscale data is screened out.

[0100] The prepared data set includes the grayscale data that meets the above-mentioned screening conditions, and also includes the preset brightness corresponding to the grayscale data that meets the above-mentioned screening conditions.

[0101] The embodiment of the present application only selects grayscale data in which the preset high grayscale is greater than the initial high grayscale and the preset low grayscale is less than the initial low grayscale. The difference between the relative high grayscale and the relative low grayscale corresponding to the original grayscale can be further widened, thereby further improving the viewing angle of the display panel and enhancing the viewing angle improvement effect.

[0102] In addition, for an original grayscale, the embodiment of the present application limits the difference between the preset high grayscale and the initial high grayscale to be less than the high grayscale threshold, which can reduce the increase of the preset high grayscale and avoid the preset high grayscale corresponding to multiple middle and high grayscales in the original grayscale being the highest grayscale.

[0103] S6. Calculating the weight of the preset brightness corresponding to each original grayscale in the prepared data set according to the emmetropia weight and the reference brightness;

[0104] Specifically, in some embodiments of the present application, the reference brightness includes a front view reference brightness and a side view reference brightness, and the preset brightness includes a front view preset brightness and a side view preset brightness. In step S6, the weight of the preset brightness is calculated as follows: K = a*|L3-L1|+(1-a)*|L4-L2|;

[0105] Among them, K represents the weight of the preset brightness, a represents the front view weight, L3 represents the front view preset brightness, L1 represents the front view reference brightness, L4 represents the side view preset brightness, and L3 represents the side view reference brightness.

[0106] S7. For the same original grayscale, select a group of grayscale data corresponding to the preset brightness with the smallest weight as a target high grayscale and a target low grayscale of the original grayscale.

[0107] The preset high grayscale in the grayscale data is used as the target high grayscale of the original grayscale, and the preset low grayscale in the grayscale data is used as the target low grayscale of the original grayscale.

[0108] It is understandable that for each original grayscale, there may be one or more sets of grayscale data that meet the screening condition of step S5 , or there may be no grayscale data that meet the screening condition of step S5 .

[0109] For an original grayscale having a set of grayscale data that meets the screening condition of step S5, there is only one weight calculated in step S6, and this set of grayscale data can be used as the target high grayscale and target low grayscale of the original grayscale.

[0110] For original grayscales with multiple sets of grayscale data that meet the screening conditions of step S5, and multiple weights calculated by step S6, a set of grayscale data corresponding to the preset brightness with the smallest weight is selected as the target high grayscale and target low grayscale of the original grayscale.

[0111] For an original grayscale for which no grayscale data satisfies the screening condition of step S5 , the initial high grayscale and the initial low grayscale corresponding to the original grayscale may be retained as the target high grayscale and the target low grayscale of the original grayscale.

[0112] In some embodiments of the present application, step S7 further includes:

[0113] A first preset grayscale is set. If the Nth original grayscale is greater than the first preset grayscale, the target high grayscale corresponding to the Nth original grayscale is greater than the target high grayscale corresponding to the N-1th original grayscale, and is less than the target high grayscale corresponding to the N-1th original grayscale plus one, wherein the difference between the grayscale value of the Nth original grayscale and the grayscale value of the N-1th original grayscale is one.

[0114] For example, if the first preset grayscale is original grayscale 160, the Nth original grayscale is original grayscale 165, and the N-1th original grayscale is original grayscale 164. The target high grayscale of original grayscale 164 is 180, then the target high grayscale of original grayscale 165 needs to be greater than 181 and less than 181.

[0115] The embodiment of the present application can further prevent the target high grayscale value corresponding to the middle and high grayscales in the original grayscale from increasing too quickly.

[0116] In some embodiments of the present application, step S7 further includes:

[0117] A second preset grayscale is set. If the Nth original grayscale is greater than the second preset grayscale, the range of the target low grayscale corresponding to the Nth original grayscale is greater than the target low grayscale corresponding to the N-1th original grayscale, and less than the highest grayscale among the multiple original grayscales.

[0118] For example, when the image display data of the display panel is binary 8 bits, the highest grayscale of the display panel is 255. Then the range of the target low grayscale corresponding to the Nth original grayscale is greater than the target low grayscale corresponding to the N-1th original grayscale, and less than 255.

[0119] The embodiment of the present application can make the target low grayscale corresponding to the obtained multiple original grayscales smoother, further improving the display effect.

[0120] In some embodiments of the present application, when the image display data of the display panel is binary 8 bits, the first preset grayscale and the second preset grayscale can both be greater than or equal to 150. For example, the first preset grayscale and the second preset grayscale can both be 150, 160, 180, 200, etc.

[0121] For further information, see Figure 7-Figure 9 .like Figure 7 As shown in the figure, the solid line represents the normal view gamma curve of the display panel before viewing angle compensation, and the dotted line represents the normal view gamma curve of the display panel after viewing angle compensation. It can be seen that after viewing angle compensation is performed using the grayscale adjustment method of the display panel in the above embodiment, the normal view gamma curve remains basically unchanged, thereby avoiding affecting the normal view display effect of the display panel.

[0122] like Figure 8 As shown in , the dotted line represents the target high grayscale, and the solid line represents the initial high grayscale. Figure 9 As shown in the figure, the dotted line represents the target low grayscale, and the solid line represents the initial low grayscale. It can be seen that compared to the initial high grayscale and initial low grayscale corresponding to the original grayscale, the viewing angle compensation makes the distance between the target high grayscale and target low grayscale curves farther. This means that the viewing angle corresponding to the target high grayscale and target low grayscale is larger than that corresponding to the initial high grayscale and initial low grayscale. Therefore, the viewing angle improvement effect is effectively enhanced.

[0123] The present application also provides a display panel. The display panel provided in the present application adopts the grayscale debugging method of the display panel described in any of the above embodiments to obtain the target high grayscale and target low grayscale of the original grayscale. For details, please refer to the above embodiments and will not be repeated here.

[0124] The display panel provided in the embodiments of the present application can be a large-sized liquid crystal display panel. The embodiments of the present application utilize the grayscale debugging method for a display panel described in any of the above embodiments to obtain a target high grayscale and a target low grayscale corresponding to an original grayscale, and display the target high grayscale and the target low grayscale corresponding to the original grayscale. This can increase the viewing angle of the display panel, improve viewing angle defects, and enhance the display effect.

[0125] The above is a detailed introduction to the grayscale debugging method of the display panel and the display panel provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, based on the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A grayscale debugging method for a display panel, characterized in that: include: S1, obtaining an initial high grayscale and an initial low grayscale corresponding to a plurality of original grayscales; S2. Obtaining reference brightness corresponding to a plurality of original grayscales according to the initial high grayscale and the initial low grayscale; S3. Setting a target grayscale arrangement and acquiring an initial data set according to the target grayscale arrangement; the initial data set including multiple sets of grayscale data corresponding to each of the original grayscales and a preset brightness corresponding to each set of the grayscale data, each set of the grayscale data including a preset high grayscale and a preset low grayscale; S4, selecting at least part of the original grayscales as binding point grayscales, and setting a high grayscale threshold and a normal view weight corresponding to each binding point grayscale; S5, screening the initial data set according to the high grayscale threshold, the initial high grayscale, and the initial low grayscale to obtain a preliminary data set; S6. Calculating the weight of the preset brightness corresponding to each original grayscale in the prepared data set according to the emmetropia weight and the reference brightness; S7. For the same original grayscale, select a group of grayscale data corresponding to the preset brightness with the smallest weight as a target high grayscale and a target low grayscale of the original grayscale.

2. The grayscale debugging method of a display panel according to claim 1, wherein: Step S1 includes: The initial high grayscale and the initial low grayscale corresponding to each original grayscale are obtained according to the front-view gamma curve and the side-view gamma curve of each color sub-pixel of the display panel.

3. The grayscale debugging method of a display panel according to claim 1, wherein: Step S5 includes: The multiple groups of grayscale data corresponding to each of the original grayscales are compared with the initial high grayscale and the initial low grayscale respectively; if the preset high grayscale in the same grayscale data is greater than the initial high grayscale, the difference between the preset high grayscale and the initial high grayscale is less than the high grayscale threshold, and the preset low grayscale is less than the initial low grayscale, then the grayscale data is retained in the prepared data set; otherwise, the grayscale data is screened out.

4. The grayscale debugging method of a display panel according to claim 1, wherein: The reference brightness includes a front view reference brightness and a side view reference brightness, and the preset brightness includes a front view preset brightness and a side view preset brightness. In step S6, the weight of the preset brightness is calculated as follows: K=a*|L3-L1|+(1-a)*|L4-L2|; Among them, K represents the weight of the preset brightness, a represents the front view weight, L3 represents the front view preset brightness, L1 represents the front view reference brightness, L4 represents the side view preset brightness, and L3 represents the side view reference brightness.

5. The grayscale debugging method of a display panel according to claim 1, wherein: The binding point grayscale includes a first binding point grayscale and a second binding point grayscale, the second binding point grayscale is greater than the first binding point grayscale, and a high grayscale threshold corresponding to the second binding point grayscale is greater than the high grayscale threshold corresponding to the first binding point grayscale.

6. The grayscale debugging method of a display panel according to claim 1, wherein: Step S4 further includes: The high grayscale threshold and the front-view weight corresponding to the original grayscale except the binding point grayscale are obtained by using the interpolation principle.

7. The grayscale debugging method of a display panel according to claim 1, wherein: Step S7 further includes: A first preset grayscale is set. If the Nth original grayscale is greater than the first preset grayscale, the target high grayscale corresponding to the Nth original grayscale is greater than the target high grayscale corresponding to the N-1th original grayscale, and is less than the target high grayscale corresponding to the N-1th original grayscale plus one, wherein the difference between the grayscale value of the Nth original grayscale and the grayscale value of the N-1th original grayscale is one.

8. The grayscale debugging method of a display panel according to claim 7, wherein: The first preset grayscale is greater than or equal to 150.

9. The grayscale debugging method of a display panel according to claim 1, wherein: Step S7 further includes: A second preset grayscale is set. If the Nth original grayscale is greater than the second preset grayscale, the range of the target low grayscale corresponding to the Nth original grayscale is greater than the target low grayscale corresponding to the N-1th original grayscale, and is less than the highest grayscale among the multiple original grayscales.

10. The grayscale debugging method of a display panel according to claim 1, wherein: Step S1 further includes: The initial high grayscale and the initial low grayscale corresponding to the original grayscale are corrected so that the initial high grayscale corresponding to each original grayscale is greater than the initial low grayscale.

11. The grayscale debugging method of a display panel according to claim 1, wherein: In the target grayscale arrangement, a ratio of the number of sub-pixels displaying at the preset high grayscale to the number of sub-pixels displaying at the preset low grayscale in the display panel is 1:1, 1:2 or 1:

3.

12. A display panel, characterized in that: The grayscale debugging method of the display panel according to any one of claims 1 to 11 is used to obtain a target high grayscale and a target low grayscale corresponding to the original grayscale.

Images