Compensation method and compensation device for display panel

Abstract

This invention discloses a compensation method and device for a display panel. The compensation method includes: obtaining an image parameter set corresponding to each gray level of the panel to be compensated when displaying a preset color image; obtaining a fitting determination coefficient corresponding to each gray level of the panel to be compensated when displaying the preset color image based on the image parameter set; obtaining gray level binding points of the preset color of the panel to be compensated based on the fitting determination coefficients; obtaining compensation parameters corresponding to the gray level binding points of the preset color; and performing display compensation on the display panel based on the compensation parameters corresponding to the gray level binding points. This invention obtains the gray level binding points of the panel to be compensated when displaying the preset color light by obtaining the fitting determination coefficient based on the image parameter set of the panel to be compensated. This helps to reduce the compensation error of other gray levels that are not selected as gray level binding points and improves the white screen color shift problem of the compensated display panel.

Description

Technical Field

[0001] This invention relates to the field of displays, and more specifically to a compensation method and device for a display panel. Background Technology

[0002] Currently, in the compensation of display defects in LED (Light Emitting Diode) display panels, the selected red, green, and blue images have the same grayscale. However, the relationship between the luminous current and brightness of the corresponding red, green, and blue light sources at the same grayscale is not consistent. This leads to errors when interpolating and compensating other unselected grayscale images, resulting in color shift when the display panel shows a white light image.

[0003] Therefore, there is an urgent need for a compensation method and device for display panels to solve the above-mentioned technical problems. Summary of the Invention

[0004] This invention provides a compensation method and device for display panels, which can alleviate the technical problem that the white screen of the display panel has color deviation after compensation because the selected red, green and blue screens have the same gray level in the display defect compensation process.

[0005] This invention provides a compensation method for a display panel, comprising:

[0006] Obtain the image parameter set corresponding to each gray level when the panel to be compensated displays a preset color image;

[0007] Based on the image parameter group, obtain the fitting determination coefficients corresponding to each gray level of the panel to be compensated when displaying the preset color image;

[0008] The grayscale binding points of the preset color of the panel to be compensated are obtained based on the fitting determination coefficients.

[0009] Obtain the compensation parameters corresponding to the grayscale binding points of the preset color, and perform display compensation on the panel to be compensated according to the compensation parameters corresponding to the grayscale binding points.

[0010] The preset color includes at least one sub-pixel color of the panel to be compensated, and the image parameter group includes at least one image parameter pair. Each image parameter pair includes a first luminous current value and a first brightness value corresponding to the first luminous current value.

[0011] Preferably, the step of obtaining the fitting determination coefficients corresponding to each gray level of the panel to be compensated when displaying the first color light based on the image parameter group includes:

[0012] The first determination coefficient corresponding to each gray level is obtained based on the image parameter group corresponding to each gray level when the panel to be compensated displays the preset color image;

[0013] Determine whether the first determination coefficient is greater than the first threshold. If so, determine the first determination coefficient as the fitting determination coefficient.

[0014] Preferably, the step of obtaining the first determination coefficients corresponding to each gray level of the panel to be compensated when displaying the preset color image based on the image parameter group corresponding to each gray level includes:

[0015] A first relational expression is established for each gray level based on the image parameters corresponding to each gray level when the panel to be compensated displays the preset color image.

[0016] Based on the first relational expression corresponding to each gray level and the image parameters corresponding to each gray level, the first determination coefficient corresponding to each gray level is obtained when the panel to be compensated displays the preset color image.

[0017] Preferably, the step of determining whether the first determination coefficient is greater than the first threshold further includes:

[0018] If not, then obtain the second determination coefficient based on the image parameters corresponding to the gray level of the first determination coefficient which is less than or equal to the first threshold;

[0019] Determine whether the second determination coefficient is greater than the second threshold. If so, determine the second determination coefficient as the fitting determination coefficient.

[0020] Preferably, the step of obtaining the second determination coefficient based on the image parameters corresponding to the grayscale of the first determination coefficient which is less than or equal to the first threshold includes:

[0021] A second relational expression is established for each of the second gray levels based on the image parameters corresponding to each of the second gray levels when the panel to be compensated displays the preset color image.

[0022] Based on the second relational formula corresponding to each of the second type of gray levels and the image parameters corresponding to each of the second type of gray levels, the second determination coefficients corresponding to each of the second type of gray levels are obtained when the panel to be compensated displays the preset color image;

[0023] Wherein, the second type of gray level is the gray level corresponding to the first determination coefficient that is less than or equal to the first threshold.

[0024] Preferably, the step of determining whether the second determination coefficient is greater than the second threshold further includes:

[0025] If not, then a third determination coefficient is obtained based on the image parameters corresponding to the grayscale of the second determination coefficient which is less than or equal to the second threshold. The third determination coefficient is the fitted determination coefficient.

[0026] Preferably, the step of obtaining a third determination coefficient based on the image parameter pair of the grayscale corresponding to the second determination coefficient which is less than or equal to the second threshold, wherein the third determination coefficient is the fitted determination coefficient, includes:

[0027] Based on the image parameters corresponding to each third gray level when the panel to be compensated displays the preset color image, a third relational formula is established for each third gray level.

[0028] Based on the third relational formula corresponding to each of the third gray levels and the image parameters corresponding to each of the third gray levels, the third determination coefficients corresponding to each of the third gray levels are obtained when the panel to be compensated displays the preset color image. The third determination coefficients are the fitting determination coefficients.

[0029] The third type of gray level is the gray level corresponding to the second determination coefficient that is less than or equal to the second threshold.

[0030] Preferably, the step of obtaining the fitting determination coefficients corresponding to each gray level of the panel to be compensated when displaying the preset color image based on the image parameter group includes:

[0031] Based on the image parameters corresponding to each gray level when the panel to be compensated displays the preset color image, establish multiple fourth relational expressions corresponding to each gray level;

[0032] Based on the multiple fourth relational expressions corresponding to each gray level and the image parameters corresponding to each gray level, the multiple first pre-determination coefficients corresponding to each gray level are obtained respectively when the panel to be compensated displays the preset color image;

[0033] The maximum value among the multiple first predeterminance coefficients corresponding to the gray level is determined as the fitting determination coefficient.

[0034] Preferably, the step of obtaining the grayscale binding points of the preset color of the panel to be compensated based on the fitting determination coefficient includes:

[0035] At least one grayscale interval is obtained based on the fitting determination coefficients;

[0036] At least one gray level is selected as the gray level binding point in the gray level range;

[0037] Wherein, the gray levels in one of the gray level intervals are continuous.

[0038] Preferably, the grayscale binding points are selected from the endpoints of the grayscale interval.

[0039] Preferably, the step of obtaining the compensation parameters corresponding to the grayscale binding points of the preset color, and performing display compensation on the panel to be compensated according to the compensation parameters corresponding to the grayscale binding points, includes:

[0040] Obtain the first compensation parameter corresponding to two adjacent grayscale binding points of the preset color;

[0041] Based on the relationship between the fitting determination coefficients of multiple gray levels in the gray level interval between two adjacent gray level binding points, the second compensation parameter corresponding to the gray level in the gray level interval between two adjacent gray level binding points is obtained.

[0042] The display compensation of the panel to be compensated is performed based on the first compensation parameter and the second compensation parameter.

[0043] Preferably, the panel to be compensated includes pixels, each pixel includes multiple types of sub-pixels, each type of sub-pixel corresponds to a different color, and the preset color includes the color corresponding to each type of sub-pixel.

[0044] The present invention also provides a compensation device for a display panel, comprising:

[0045] The parameter collection unit is used to acquire the image parameter set corresponding to each gray level when the panel to be compensated displays a preset color image;

[0046] The fitting unit is used to obtain the fitting determination coefficients corresponding to each gray level of the panel to be compensated when displaying the preset color image, based on the image parameter group.

[0047] The grayscale selection unit is used to obtain the grayscale binding points of the preset color of the panel to be compensated based on the fitting determination coefficient.

[0048] The compensation unit is used to obtain the compensation parameters corresponding to the grayscale binding points of the preset color, and to perform display compensation on the panel to be compensated according to the compensation parameters corresponding to the grayscale binding points.

[0049] This invention obtains grayscale binding points when the panel to be compensated displays a preset color light by acquiring fitting determination coefficients based on the image parameter set when the panel to be compensated displays the preset color light. This helps to reduce the compensation errors of other grayscale levels that were not selected as grayscale binding points and improves the white screen color deviation problem of the compensated display panel. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is a flowchart of the steps of the compensation method for the display panel provided in the embodiment of the present invention;

[0052] Figure 2 This is the result of the first determination coefficient corresponding to different gray levels when the panel to be compensated displays red light, as provided in the embodiment of the present invention;

[0053] Figure 3 This is the result of the first determination coefficient corresponding to different gray levels when the panel to be compensated displays green light, as provided in the embodiments of the present invention;

[0054] Figure 4 This is the result of the first determination coefficient corresponding to different gray levels when the panel to be compensated displays blue light, as provided in the embodiments of the present invention;

[0055] Figure 5 This is a schematic diagram of a compensation device for a display panel provided in an embodiment of the present invention. Detailed Implementation

[0056] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0057] Currently, in the display defect compensation of display panels, the same grayscale is selected for red, green and blue light images, which makes it easy to make errors when interpolating compensation for other unselected grayscale images. This results in color shift problems in the white light image displayed on the display panel after display defect compensation.

[0058] Please see Figures 1 to 4 This invention provides a compensation method for a display panel, comprising:

[0059] Obtain the image parameter set corresponding to each gray level when the panel to be compensated displays a preset color image;

[0060] Based on the image parameter group, obtain the fitting determination coefficients corresponding to each gray level of the panel to be compensated when displaying the preset color image;

[0061] The grayscale binding points of the preset color of the panel to be compensated are obtained based on the fitting determination coefficients.

[0062] Obtain the compensation parameters corresponding to the grayscale binding points of the preset color, and perform display compensation on the panel to be compensated according to the compensation parameters corresponding to the grayscale binding points.

[0063] The preset color includes at least one sub-pixel color of the panel to be compensated, and the image parameter group includes at least one image parameter pair. Each image parameter pair includes a first luminous current value and a first brightness value corresponding to the first luminous current value.

[0064] This invention obtains grayscale binding points when the panel to be compensated displays a preset color light by acquiring fitting determination coefficients based on the image parameter set when the panel to be compensated displays the preset color light. This helps to reduce the compensation errors of other grayscale levels that were not selected as grayscale binding points and improves the white screen color deviation problem of the compensated display panel.

[0065] The technical solution of the present invention will now be described in conjunction with specific embodiments.

[0066] The compensation method for the display panel includes:

[0067] S100: Obtain the image parameter group corresponding to each gray level when the panel to be compensated displays a preset color image.

[0068] The preset color includes at least one sub-pixel color of the panel to be compensated.

[0069] In this embodiment, the preset color can be red, green, or blue. The panel to be compensated may have a preset color light source. When the preset color is red, the preset color light source may be a red LED chip, and the panel to be compensated displays a red light image. The first luminous current value and the first brightness value correspond to the current value driving the red LED chip to emit light of the corresponding intensity and the brightness of the red light image displayed by the panel to be compensated when the panel to be compensated displays a red light image. When the preset color light source is green, the preset color light source may be a green LED chip, and the panel to be compensated displays a green light image. The first luminous current value and the first brightness value correspond to the current value driving the green LED chip to emit light of the corresponding intensity and the brightness of the green light image displayed by the panel to be compensated when the panel to be compensated displays a green light image. When the preset color light source is blue, the preset color light source may be a blue LED chip, and the panel to be compensated displays a blue light image. The first luminous current value and the first brightness value correspond to the current value driving the blue LED chip to emit light of the corresponding intensity and the brightness of the blue light image displayed by the panel to be compensated when the panel to be compensated displays a blue light image.

[0070] S200: Obtain the fitting determination coefficients corresponding to each gray level of the panel to be compensated when displaying the preset color image, based on the image parameter group.

[0071] In this embodiment, step S200 includes:

[0072] S210. Obtain the first determination coefficient corresponding to each gray level when the panel to be compensated displays the preset color image based on the image parameter group corresponding to each gray level.

[0073] Please see Figures 2 to 4 In this embodiment, when the panel to be compensated displays red light, green light and blue light respectively, the first determination coefficients obtained for different gray levels are not the same.

[0074] In this embodiment, step S210 further includes:

[0075] S211. Establish a first relational expression for each gray level based on the image parameters corresponding to each gray level when the panel to be compensated displays the preset color image.

[0076] Each grayscale level corresponds to an image parameter group comprising at least one image parameter pair, each image parameter pair comprising a first luminous current value and a first luminance value corresponding to the first luminous current value. Assuming that each grayscale level corresponds to x image parameter pairs, then in the image parameter pair corresponding to the nth grayscale level, the first luminous current value can be represented by I0.nL This means that the first brightness value can be represented by L. nL This means that L is greater than 0 and less than or equal to x.

[0077] The first relationship can be a linear relationship, a quadratic relationship, or a cubic relationship between the first luminous current value and the first brightness value, or other relationships that the first luminous current value and the first brightness value can satisfy.

[0078] When the first relationship is a linear relationship between the first luminous current value and the first brightness value, the first relationship can be: ;

[0079] Where, k n k is the first linear coefficient, m is the first constant; n It is not 0, m can be 0.

[0080] S212. Based on the first relational formula corresponding to each gray level and the image parameters corresponding to each gray level, obtain the first determination coefficient corresponding to each gray level when the panel to be compensated displays the preset color image.

[0081] In this embodiment, step S212 includes:

[0082] S212a. Obtain the first fitted brightness value corresponding to each gray level based on the first luminous current value corresponding to each gray level and the first relational expression.

[0083] S212b: Obtain the first average luminous current value corresponding to each gray level based on the first luminous current value corresponding to each gray level and the first relational expression.

[0084] S212c: Obtain the first average fitted brightness value corresponding to each gray level based on the first average luminous current value corresponding to each gray level.

[0085] S212d: Obtain the first determination coefficient R1 corresponding to each gray level based on the first brightness value corresponding to each gray level, the first fitted brightness value corresponding to each gray level, and the first average fitted brightness value corresponding to each gray level. 2 .

[0086] The first coefficient of determination can be calculated as follows: ;

[0087] in, The first luminous current value I is represented as the nth gray level. nL The first fitted brightness value is calculated by substituting it into the first relational expression corresponding to the nth gray level; This represents the first brightness value actually measured at the nth gray level; This is represented as the first average fitted brightness value corresponding to the nth gray level.

[0088] In this embodiment, step S210 may further include:

[0089] S213. Based on the image parameters corresponding to each gray level when the panel to be compensated displays the preset color image, establish multiple fifth relational expressions corresponding to each gray level.

[0090] In this embodiment, the fifth relation can be a linear, quadratic, or cubic relation between the first luminous current value and the first brightness value, or other relation that the first luminous current value and the first brightness value can satisfy. The fifth relation can be the same as or different from the first relation.

[0091] When the fifth relation is a linear relation, the fifth relation can be: ;

[0092] Among them, D n D is the fourth linear coefficient, and e is the fourth constant; n If it is not 0, e can be 0.

[0093] For example, when the number of parameter pairs corresponding to the nth gray level is greater than or equal to 2, the image parameter pairs can be grouped, and multiple fifth relational expressions corresponding to the nth gray level can be established based on the image parameter pairs of each group in the nth gray level when the panel to be compensated displays the preset color image.

[0094] Step S213 includes:

[0095] S213a. Divide the image parameter pairs corresponding to each gray level of the panel to be compensated when displaying the preset color image into N parameter groups;

[0096] Where N is greater than or equal to 2, and N is an integer.

[0097] S213b. Based on the image parameters in each parameter group corresponding to each gray level when the panel to be compensated displays the preset color image, establish N fifth relational expressions corresponding to each gray level.

[0098] S214. Based on the multiple fifth relational expressions corresponding to each gray level and the image parameters corresponding to each gray level, obtain the multiple second pre-determination coefficients corresponding to each gray level when the panel to be compensated displays the preset color image.

[0099] In this embodiment, step S214 includes:

[0100] S214a. Obtain the first prefit brightness value corresponding to each parameter group in each gray level according to the image parameter pair in each parameter group corresponding to each gray level and the fifth relational expression corresponding to each parameter group.

[0101] S214b: Obtain the first pre-average luminous current value corresponding to each parameter group in each gray level according to the image parameter pair in each parameter group corresponding to each gray level and the fifth relational expression corresponding to each parameter group.

[0102] S214c, According to the first pre-averaged fitted brightness value corresponding to each parameter group in each of the gray levels.

[0103] S214d. Obtain the second pre-determination coefficient R1 corresponding to each parameter group in each grayscale based on the first brightness value corresponding to each parameter group in each grayscale, the first pre-fitted brightness value corresponding to each parameter group in each grayscale, and the first pre-average fitted brightness value corresponding to each parameter group in each grayscale. 2 .

[0104] The second predeterminant coefficient can be calculated as follows: ;

[0105] Where M represents the Mth group in the nth gray level, and M is less than or equal to N; This represents the first luminous current value I corresponding to the Mth group at the nth gray level. nL The first prefitted brightness value is calculated by substituting it into the fifth relational expression corresponding to the nth gray level; This represents the first brightness value actually measured at the nth gray level; This is represented as the first pre-averaged fitted brightness value corresponding to the Mth group in the nth gray level.

[0106] S215. Determine the first determination coefficient corresponding to each gray level based on the maximum value among the plurality of second pre-determination coefficients corresponding to each gray level.

[0107] S220. Determine whether the first determination coefficient is greater than the first threshold. If so, the first determination coefficient is the fitting determination coefficient.

[0108] The first threshold can be any value greater than or equal to 0.85 and less than 1, such as 0.85, 0.95, 0.99, etc.

[0109] In this embodiment, step S200 further includes:

[0110] S230. If not, then obtain the second determination coefficient based on the image parameters corresponding to the grayscale of the first determination coefficient which is less than or equal to the first threshold.

[0111] In this embodiment, step S230 further includes:

[0112] S231. Based on the image parameters corresponding to each second gray level when the panel to be compensated displays the preset color image, establish a second relational expression for each second gray level.

[0113] The second type of gray level is the gray level corresponding to the first determination coefficient that is less than or equal to the first threshold.

[0114] In this embodiment, the second relationship can be a linear relationship, a quadratic relationship, or a cubic relationship between the first luminous current value and the first brightness value, or other relationships that the first luminous current value and the first brightness value can satisfy. The second relationship is different from the first relationship or the fifth relationship.

[0115] When the second relationship can be the square of the first luminous current value and the first brightness value, the second relationship can be: ;

[0116] Among them, a n b is the first square coefficient. n is the second linear coefficient, and c is the second constant. n Not equal to 0, b n c can be 0.

[0117] S232. Based on the second relational formula corresponding to each of the second gray levels and the image parameters corresponding to each of the second gray levels, obtain the second determination coefficients corresponding to each of the second gray levels when the panel to be compensated displays the preset color image.

[0118] In this embodiment, step S232 may include:

[0119] S232a. Obtain the second fitted brightness value corresponding to each of the second gray levels based on the first luminous current value corresponding to each of the second gray levels and the second relational expression.

[0120] S232b: Obtain the second average luminous current value corresponding to each of the second gray levels based on the first luminous current value corresponding to each of the second gray levels and the second relationship.

[0121] S232c: Obtain the second average fitted brightness value corresponding to each of the second gray levels based on the second average luminous current value corresponding to each of the second gray levels.

[0122] S232d: Obtain the second determination coefficient R2 for each of the second types of gray levels based on the first brightness value corresponding to each of the second types of gray levels, the second fitted brightness value corresponding to each of the second types of gray levels, and the second average fitted brightness value corresponding to each of the second types of gray levels. 2 .

[0123] The second coefficient of determination can be calculated as follows: ;

[0124] in, The first luminous current value I is represented as the nth gray level in the second type of gray levels. n The second fitted brightness value is calculated by substituting it into the second relational expression corresponding to the nth gray level; This represents the first brightness value actually measured when the gray level is the nth gray level in the second type of gray level; This is represented as the second average fitted brightness value corresponding to the nth gray level in the second type of gray levels.

[0125] In this embodiment, step SS230 may further include:

[0126] S233. Based on the image parameters corresponding to each of the second type of grayscale when the panel to be compensated displays the preset color image, establish multiple sixth relational expressions corresponding to each of the second type of grayscale.

[0127] In this embodiment, the sixth relation can be a linear, quadratic, or cubic relation between the first luminous current value and the first brightness value, or other relation that the first luminous current value and the first brightness value can satisfy. The sixth relation can be the same as or different from the second relation, and the sixth relation can be different from the first relation or the second relation.

[0128] When the sixth relation is a square relation, the sixth relation can be: ;

[0129] Among them, f n The fifth square coefficient, g n f is the fifth linear coefficient, and h is the fifth constant. n Not equal to 0, g n h can be 0.

[0130] For example, when the number of parameter pairs corresponding to the nth gray level in the second type of gray level is greater than or equal to 2, the image parameter pairs can be grouped, and multiple sixth relational expressions corresponding to the nth gray level can be established according to the image parameter pairs of each group in the nth gray level when the panel to be compensated displays the preset color image.

[0131] Step S233 includes:

[0132] S233a. Divide the image parameter pairs corresponding to each second gray level of the panel to be compensated when displaying the preset color image into Y second-class parameter groups;

[0133] Where Y is greater than or equal to 2, and N is an integer.

[0134] S233b. Based on the image parameters in each second type parameter group corresponding to each second type gray level when the panel to be compensated displays the preset color image, establish N sixth relational expressions corresponding to each second type gray level.

[0135] S234. Based on the multiple sixth relational expressions corresponding to each of the second type of gray levels and the image parameters corresponding to each of the second type of gray levels, obtain the multiple third pre-determination coefficients corresponding to each of the second type of gray levels when the panel to be compensated displays the preset color image.

[0136] In this embodiment, step S234 includes:

[0137] S234a. Obtain the second prefit brightness value corresponding to each of the second type of parameter groups in each of the second type of gray levels according to the image parameter pair in each of the second type of parameter groups corresponding to each of the second type of gray levels and the sixth relational expression corresponding to each of the second type of parameter groups.

[0138] S234b: Obtain the second pre-average luminous current value corresponding to each of the second type of parameter groups in each of the second type of gray levels according to the image parameter pair in each of the second type of parameter groups corresponding to each of the gray levels and the sixth relational expression corresponding to each of the second type of parameter groups.

[0139] S234c, According to the second pre-average fitted brightness value corresponding to each of the second type parameter groups in each of the second type gray levels.

[0140] S234d. Based on the first brightness value corresponding to each second type parameter group in each second type of grayscale, the second prefitted brightness value corresponding to each second type parameter group in each second type of grayscale, and the second pre-average fitted brightness value corresponding to each second type parameter group in each second type of grayscale, obtain the third pre-determination coefficient R corresponding to each second type parameter group in each second type of grayscale. M5 2 .

[0141] The third predetermination coefficient can be calculated as follows: ;

[0142] Where M represents the Mth group in the nth gray level of the second type of gray level, and M is less than or equal to N; This represents the first luminous current value I corresponding to the Mth group at the nth gray level. nL The first prefitted brightness value is calculated by substituting it into the fifth relational expression corresponding to the nth gray level; This represents the first brightness value actually measured at the nth gray level; This is represented as the first pre-averaged fitted brightness value corresponding to the Mth group in the nth gray level.

[0143] S235. Determine the second determination coefficient corresponding to each of the second gray levels based on the maximum value among the plurality of third pre-determination coefficients corresponding to each of the second gray levels.

[0144] S240. Determine whether the second determination coefficient is greater than the second threshold. If so, determine the second determination coefficient as the fitting determination coefficient.

[0145] The second threshold can be any value greater than or equal to 0.85 and less than 1, such as 0.85, 0.95, 0.99, etc. The second threshold can be the same as or different from the first threshold.

[0146] In this embodiment, step S200 further includes:

[0147] S250. If not, then obtain a third determination coefficient based on the image parameters corresponding to the grayscale of the second determination coefficient which is less than or equal to the second threshold. The third determination coefficient is the fitted determination coefficient.

[0148] In this embodiment, step S250 includes:

[0149] S251. Based on the image parameters corresponding to each third gray level when the panel to be compensated displays the preset color image, establish a third relational expression corresponding to each third gray level.

[0150] The third type of gray level is the gray level corresponding to the second determination coefficient that is less than or equal to the second threshold.

[0151] The third relationship can be a linear relationship, a quadratic relationship, or a cubic relationship between the first luminous current value and the first brightness value, or other relationships that the first luminous current value and the first brightness value can satisfy. The third relationship is different from the first relationship or the fifth relationship, and the third relationship is different from the second relationship or the sixth relationship.

[0152] When the third relationship can be the cube relationship between the first luminous current value and the first brightness value, the third relationship can be: ;

[0153] Where, p n q is the first cubic coefficient. n r is the second square coefficient. n The third linear coefficient, s is the third constant. p n Not equal to 0, q n r n s can be 0.

[0154] S252. Based on the third relational formula corresponding to each of the third gray levels and the image parameters corresponding to each of the third gray levels, obtain the third determination coefficients corresponding to each of the third gray levels when the panel to be compensated displays the preset color image. The third determination coefficients are the fitting determination coefficients.

[0155] In this embodiment, step S252 includes:

[0156] S252a. Obtain the third fitted brightness value corresponding to each of the third gray levels based on the first luminous current value corresponding to each of the third gray levels and the third relational expression.

[0157] S252b: Obtain the third average luminous current value corresponding to each of the third gray levels based on the first luminous current value corresponding to each of the third gray levels and the third relational expression.

[0158] S252c: Obtain the third average fitted brightness value corresponding to each of the third gray levels based on the third average luminous current value corresponding to each of the third gray levels.

[0159] S252d, Based on the first brightness value corresponding to each of the third gray levels, the third fitted brightness value corresponding to each of the third gray levels, and the third average fitted brightness value corresponding to each of the third gray levels, obtain the third determination coefficient R3 corresponding to each of the third gray levels. 2 The third coefficient of determination is the fitting coefficient of determination.

[0160] The third coefficient of determination can be calculated as follows: ;

[0161] in, The first luminous current value I is represented as the nth gray level in the third type of gray levels. n The third fitted brightness value is calculated by substituting it into the third relationship corresponding to the nth gray level; This represents the first brightness value actually measured at the nth gray level; This is represented as the third average fitted brightness value.

[0162] In this embodiment, step S200 may also be:

[0163] S260. Based on the image parameters corresponding to each gray level when the panel to be compensated displays the preset color image, establish multiple fourth relational expressions corresponding to each gray level.

[0164] The plurality of fourth relationships may include a first sub-relationship, a second sub-relationship, and a third sub-relationship. These three sub-relationships are distinct and may be one of a linear relationship, a quadratic relationship, or a cubic relationship between the first luminous current value and the first brightness value. For example, the first sub-relationship may be a linear relationship between the first luminous current value and the first brightness value, the second sub-relationship may be a quadratic relationship between the first luminous current value and the first brightness value, and the third sub-relationship may be a cubic relationship between the first luminous current value and the first brightness value.

[0165] S270. Based on the multiple fourth relational expressions corresponding to each gray level and the image parameters corresponding to each gray level, obtain the multiple first pre-determination coefficients corresponding to each gray level when the panel to be compensated displays the preset color image.

[0166] In this embodiment, the first predetermination coefficient includes a first type of predetermination coefficient, a second type of predetermination coefficient, and a third type of predetermination coefficient.

[0167] In this embodiment, step S270 includes:

[0168] S271. Based on the first sub-relationship corresponding to each gray level and the image parameters corresponding to each gray level, obtain the first type of pre-determination coefficients corresponding to each gray level when the panel to be compensated displays the preset color image.

[0169] S272. Based on the second sub-relationship corresponding to each gray level and the image parameters corresponding to each gray level, obtain the second type of pre-determination coefficients corresponding to each gray level when the panel to be compensated displays the preset color image.

[0170] S273. Based on the third sub-relationship corresponding to each gray level and the image parameters corresponding to each gray level, obtain the third type of pre-determination coefficients corresponding to each gray level when the panel to be compensated displays the preset color image.

[0171] The first sub-relationship can be a linear relationship between the first luminous current value and the first brightness value; the second sub-relationship can be a quadratic relationship between the first luminous current value and the first brightness value; and the third sub-relationship can be a cubic relationship between the first luminous current value and the first brightness value. When the first sub-relationship corresponds to the panel to be compensated, the method for obtaining the first type of pre-determination coefficient for each grayscale level when displaying the preset color image is the same as or similar to the method for obtaining the first determination coefficient. Similarly, the method for obtaining the second type of pre-determination coefficient for each grayscale level when displaying the preset color image on the panel to be compensated, corresponding to the second sub-relationship, is the same as or similar to the method for obtaining the second determination coefficient. The method for obtaining the third type of pre-determination coefficient for each grayscale level when displaying the preset color image on the panel to be compensated, corresponding to the third sub-relationship, is the same as or similar to the method for obtaining the third determination coefficient. Further details are omitted here.

[0172] S280. Determine the maximum value among the multiple first pre-determination coefficients corresponding to the gray level as the fitting determination coefficient.

[0173] In this embodiment, the first type of predetermination coefficient, the second type of predetermination coefficient, and the third type of predetermination coefficient are compared with each other, and the maximum value among them is selected as the fitting determination coefficient.

[0174] That is, when the value of the first type of predetermination coefficient corresponding to a gray level is the maximum, the first type of predetermination coefficient is the fitting determination coefficient corresponding to that gray level.

[0175] When the value of the second type of predetermination coefficient corresponding to a gray level is the maximum, the second type of predetermination coefficient is the fitting determination coefficient corresponding to that gray level.

[0176] When the value of the third type of predetermination coefficient corresponding to a gray level is the maximum, the third type of predetermination coefficient is the fitting determination coefficient corresponding to that gray level.

[0177] S300. Obtain the grayscale binding points of the preset color of the panel to be compensated based on the fitting determination coefficient.

[0178] In this embodiment, step S300 includes:

[0179] S310. Obtain at least one corresponding grayscale interval based on the fitting determination coefficient;

[0180] S320. Select at least one gray level from the gray level range as the gray level binding point;

[0181] Wherein, the gray levels in one of the gray level intervals are continuous.

[0182] The grayscale binding points can be selected from the endpoints of the grayscale range.

[0183] In this embodiment, step S310 may include:

[0184] S311. Obtain at least one corresponding first-class grayscale interval based on the first-class fitting determination coefficient.

[0185] Wherein, the first type of fitting determination coefficient is greater than the first threshold, the first type of grayscale range includes the first type of grayscale, and the first type of grayscale is the grayscale corresponding to the first determination coefficient greater than the first threshold. Alternatively, the first type of fitting determination coefficient is the first type of pre-determination coefficient, and the first type of grayscale is the grayscale corresponding to the first type of pre-determination coefficient as the fitting determination coefficient.

[0186] In this embodiment, step S311 includes:

[0187] S311a. Obtain the first gray level corresponding to each first type of fitting determination coefficient.

[0188] S311b: Group consecutive gray levels of the first type into the same gray level interval of the first type.

[0189] In this embodiment, step S311b may include:

[0190] Arrange the first type of gray levels in ascending or descending order;

[0191] Determine whether the t-th first type gray level and the (t+1)-th first type gray level are continuous. If so, the t-th first type gray level and the (t+1)-th first type gray level are assigned to the v-th first type gray level interval.

[0192] If not, then the (t+1)th gray level of the first type is assigned to the (v+1)th gray level of the first type.

[0193] Where t is an integer greater than or equal to 0, and v is an integer greater than or equal to 1.

[0194] For example, if the first fitting determination coefficients corresponding to gray levels 35 to 69 and 78 to 122 are greater than the first threshold, and gray levels 35 to 69 and 78 to 122 are the first type of gray levels, then the continuous gray levels 35 to 69 are one first type of gray level interval, and gray levels 78 to 122 are another first type of gray level interval, which can be represented as [35, 69] and [78, 122], respectively.

[0195] In this embodiment, step S310 further includes:

[0196] S312. Obtain at least one corresponding second-class grayscale interval based on the second-class fitting determination coefficient.

[0197] In this embodiment, step S312 includes:

[0198] S312a. Obtain the fourth gray level corresponding to each of the second type of fitting determination coefficients.

[0199] Wherein, the second type of fitting determination coefficient is greater than the second threshold, the first determination coefficient corresponding to the fourth type of grayscale is less than or equal to the first threshold, and the second determination coefficient corresponding to the fourth type of grayscale is greater than the second threshold. Alternatively, the second type of fitting determination coefficient is the second type of pre-determination coefficient, and the second type of grayscale is the grayscale corresponding to the second type of pre-determination coefficient as the fitting determination coefficient.

[0200] S312b, group the continuous fourth gray levels into the same second gray level interval.

[0201] In this embodiment, the detailed steps of step S312b are similar to those of S311b, and will not be repeated here.

[0202] In this embodiment, step S310 further includes:

[0203] S313. Obtain at least one corresponding third-class grayscale interval based on the third-class fitting determination coefficient.

[0204] S313a. Obtain the third gray level corresponding to each of the third type of fitting determination coefficients.

[0205] Wherein, the third type of fitting determination coefficient is the same as the third determination coefficient, the first determination coefficient corresponding to the third type of gray level is less than or equal to the first threshold, and the second determination coefficient corresponding to the third type of gray level is less than or equal to the second threshold. Alternatively, the third type of fitting determination coefficient is the third type of pre-determination coefficient, and the third type of gray level is the gray level corresponding to the third type of pre-determination coefficient as the fitting determination coefficient.

[0206] S313b, group the consecutive third gray levels into the same third gray level interval.

[0207] In this embodiment, the detailed steps of step S313b are similar to those of S311b, and will not be repeated here.

[0208] In this embodiment, step S320 includes:

[0209] S321. Select at least one gray level of the first type from the first type of gray level intervals as the first type of gray level binding point.

[0210] The first type of gray level binding point can be the endpoint of the first type of gray level range. For example, if gray level 35 to gray level 69 is a first type of gray level range, then the first type of gray level binding point of the first type of gray level range can be gray level 35 and / or gray level 69.

[0211] In this embodiment, step S320 further includes:

[0212] S322. Select at least one of the fourth gray levels from the second gray level range as the second gray level binding point.

[0213] The second type of grayscale binding point can be the endpoint of the second type of grayscale interval.

[0214] In this embodiment, step S320 further includes:

[0215] S323. Select at least one of the third gray levels in the third gray level range as the third gray level binding point.

[0216] The third type of grayscale binding point can be the endpoint of the third type of grayscale interval.

[0217] Step S400: Obtain the compensation parameters corresponding to the grayscale binding points of the preset color, and perform display compensation on the panel to be compensated according to the compensation parameters corresponding to the grayscale binding points.

[0218] In this embodiment, step S400 includes:

[0219] S410. Obtain the first compensation parameter corresponding to the two adjacent grayscale binding points of the preset color.

[0220] In this embodiment, step S410 includes:

[0221] S411. Obtain the first compensation parameter corresponding to the two adjacent grayscale binding points of the first type of preset color.

[0222] Among them, two adjacent gray-scale binding points of the first type can belong to the same gray-scale interval of the first type.

[0223] The first compensation parameter may be a first compensation brightness value and / or a first compensation current value.

[0224] In this embodiment, step S410 further includes:

[0225] S412. Obtain the first compensation parameter corresponding to two adjacent grayscale binding points of the second type of the preset color.

[0226] Among them, two adjacent gray-scale binding points of the second type can belong to the same gray-scale interval of the second type.

[0227] In this embodiment, step S410 further includes:

[0228] S413. Obtain the first compensation parameter corresponding to the two adjacent third grayscale binding points of the preset color.

[0229] Among them, two adjacent third-type gray-level binding points can belong to the same third-type gray-level interval.

[0230] S420. Based on the relationship between the fitting determination coefficients of multiple gray levels in the gray level interval between two adjacent gray level binding points, obtain the second compensation parameter corresponding to the gray level in the gray level interval between two adjacent gray level binding points.

[0231] The second compensation parameter can be a second compensation brightness value and a second compensation current value corresponding to the second compensation brightness value.

[0232] In this embodiment, step S420 includes:

[0233] S421. Based on the first type of relational expression corresponding to the first type of fitting determination coefficients of multiple first type gray levels between two adjacent first type gray level binding points, obtain the second compensation parameter corresponding to the first type gray level in the first type gray level interval between two adjacent first type gray level binding points.

[0234] In this embodiment, step S421 may include:

[0235] S421a. Based on the first compensation parameters corresponding to two adjacent first-type grayscale binding points and the first relational expressions or the fifth relational expressions corresponding to multiple first-type grayscales between the two adjacent first-type grayscale binding points, establish the first type relational expressions corresponding to the first type fitting determination coefficients corresponding to the multiple first-type grayscales between the two adjacent first-type grayscale binding points.

[0236] For example, when the first relation or the fifth relation is a linear relationship between the first luminous current value and the first brightness value, the first relation corresponding to the first type of fitting determination coefficients of the multiple first type of gray levels between two adjacent first type gray level binding points can be a linear relationship between the second compensation brightness value corresponding to the first type of gray level and the second compensation current value corresponding to the second compensation brightness value.

[0237] In this embodiment, step S420 further includes:

[0238] S422. Based on the second type of relational expression corresponding to the second type of fitting determination coefficients of multiple second type gray levels between two adjacent second type gray level binding points, obtain the second compensation parameter corresponding to the second type gray level in the second type gray level interval between two adjacent second type gray level binding points.

[0239] In this embodiment, step S422 may include:

[0240] S422a. Based on the first compensation parameter corresponding to two adjacent second-type grayscale binding points and the second relation or the sixth relation corresponding to multiple second-type grayscales between the two adjacent second-type grayscale binding points, establish the second-type relation corresponding to the second-type fitting determination coefficients between the multiple second-type grayscales between the two adjacent second-type grayscale binding points.

[0241] For example, when the second relationship or the sixth relationship is a quadratic relationship between the first luminous current value and the first brightness value, the second relationship corresponding to the second type of fitting determination coefficients of the multiple second type of gray levels between two adjacent second type gray level binding points can be a quadratic relationship between the second compensation brightness value corresponding to the second type of gray level and the second compensation current value corresponding to the second compensation brightness value.

[0242] In this embodiment, step S420 further includes:

[0243] S423. Based on the third-class relational formula corresponding to the third-class fitting determination coefficients of multiple third-class gray levels between two adjacent third-class gray level binding points, obtain the second compensation parameter corresponding to the third-class gray level in the third-class gray level interval between two adjacent third-class gray level binding points.

[0244] In this embodiment, step S423 may include:

[0245] S423a. Based on the first compensation parameters corresponding to two adjacent third-type grayscale binding points and the third relational expressions corresponding to multiple third-type grayscales between two adjacent third-type grayscale binding points, establish the third-type relational expression corresponding to the third-type fitting determination coefficients corresponding to multiple third-type grayscales between two adjacent second-type grayscale binding points.

[0246] For example, when the third relationship is the cubic relationship between the first luminous current value and the first brightness value, the third relationship corresponding to the third type of fitting determination coefficients of the multiple third type of gray levels between two adjacent third type gray level binding points can be the cubic relationship between the second compensation brightness value corresponding to the third type of gray level and the second compensation current value corresponding to the second compensation brightness value.

[0247] S430. Perform display compensation on the panel to be compensated according to the first compensation parameter and the second compensation parameter.

[0248] In this embodiment, step S430 includes:

[0249] S431. Perform display compensation on the panel to be compensated according to the first compensation parameter corresponding to the first type of gray level binding point and the second compensation parameter corresponding to the first type of gray level in the first type of gray level interval between each of the two adjacent first type of gray level binding points.

[0250] In this embodiment, step S430 further includes:

[0251] S432. Perform display compensation on the panel to be compensated according to the first compensation parameter corresponding to the second type of gray level binding point and the second compensation parameter corresponding to the second type of gray level in the second type of gray level interval between each of the two adjacent second type of gray level binding points.

[0252] In this embodiment, step S430 further includes:

[0253] S433. Perform display compensation on the panel to be compensated according to the first compensation parameter corresponding to the third type of gray level binding point and the second compensation parameter corresponding to the third type of gray level in the third type of gray level interval between each of the two adjacent third type of gray level binding points.

[0254] In this embodiment, the panel to be compensated includes pixels, each pixel includes multiple types of sub-pixels, each type of sub-pixel corresponds to a different color, and the preset color includes the color corresponding to each type of sub-pixel.

[0255] This invention obtains grayscale binding points when the panel to be compensated displays a preset color light by acquiring fitting determination coefficients based on the image parameter set when the panel to be compensated displays the preset color light. This helps to reduce compensation errors for other grayscale levels that were not selected as grayscale binding points and improves the white screen color shift problem of the compensated display panel.

[0256] Please see Figure 5 The present invention also provides a compensation device 100 for a display panel, comprising:

[0257] The parameter collection unit 10 is used to acquire the image parameter group corresponding to each gray level when the panel to be compensated displays a preset color image.

[0258] The preset color includes at least one sub-pixel color of the panel to be compensated, and the image parameter group includes at least one image parameter pair. Each image parameter pair includes a first luminous current value and a first brightness value corresponding to the first luminous current value.

[0259] The fitting unit 20 is used to obtain the fitting determination coefficients corresponding to each gray level of the panel to be compensated when displaying the preset color image, based on the image parameter group.

[0260] The grayscale selection unit 30 is used to obtain the grayscale binding points of the preset color of the panel to be compensated based on the fitting determination coefficient.

[0261] The compensation unit 40 acquires the compensation parameters corresponding to the grayscale binding points of the preset color, and performs display compensation on the panel to be compensated according to the compensation parameters corresponding to the grayscale binding points.

[0262] In this embodiment, the fitting unit 20 includes a first fitting subunit, which is used to obtain the first determination coefficients corresponding to each gray level when the panel to be compensated displays the preset color image based on the image parameter group corresponding to each gray level.

[0263] In this embodiment, the first fitting subunit includes a first fitting part and a second fitting part. The first fitting part is used to establish a first relational expression for each gray level based on the image parameters corresponding to each gray level when the panel to be compensated displays the preset color image; the second fitting part is used to obtain a first determination coefficient corresponding to each gray level when the panel to be compensated displays the preset color image based on the first relational expression for each gray level and the image parameters corresponding to each gray level. The first relational expression can be: k n k is the first linear coefficient, m is the first constant; n It is not 0, m can be 0.

[0264] In this embodiment, the first fitting subunit may include a third fitting unit, a fourth fitting unit, and a fifth fitting unit. The third fitting unit is used to establish multiple fifth relational expressions corresponding to each gray level based on the image parameters corresponding to each gray level when the panel to be compensated displays the preset color image. The fourth fitting unit is used to obtain multiple second pre-determination coefficients corresponding to each gray level when the panel to be compensated displays the preset color image based on the multiple fifth relational expressions and the image parameters corresponding to each gray level. The fifth fitting unit is used to determine the first determination coefficient corresponding to each gray level based on the maximum value among the multiple second pre-determination coefficients corresponding to each gray level. The fifth relational expression may be: ;

[0265] Among them, D n D is the fourth linear coefficient, and e is the fourth constant; n If it is not 0, e can be 0.

[0266] In this embodiment, the fitting unit 20 further includes a first determination subunit, which is used to determine whether the first determination coefficient is greater than a first threshold. If so, the first determination coefficient is the fitting determination coefficient.

[0267] In this embodiment, the fitting unit 20 further includes a second fitting subunit, which is used to obtain a second determination coefficient based on the image parameters of the gray level corresponding to the first determination coefficient that is less than or equal to the first threshold when the first determination subunit determines that the first determination coefficient is less than or equal to the first threshold.

[0268] The second fitting subunit includes a sixth fitting unit and a seventh fitting unit. The sixth fitting unit is used to establish a second relational expression for each of the second gray levels based on the image parameters corresponding to each of the second gray levels when the panel to be compensated displays the preset color image. The seventh fitting unit is used to obtain a second determination coefficient for each of the second gray levels when the panel to be compensated displays the preset color image based on the second relational expression and the image parameters corresponding to each of the second gray levels. The second relational expression can be: a n b is the first square coefficient. n is the second linear coefficient, and c is the second constant. n Not equal to 0, b n c can be 0.

[0269] In this embodiment, the second fitting subunit further includes an eighth fitting unit, a ninth fitting unit, and a tenth fitting unit. The eighth fitting unit is used to establish multiple sixth relational expressions corresponding to each of the second gray levels based on the image parameters corresponding to each of the second gray levels when the panel to be compensated displays the preset color image. The ninth fitting unit is used to obtain multiple third pre-determination coefficients corresponding to each of the second gray levels when the panel to be compensated displays the preset color image based on the multiple sixth relational expressions and the image parameters corresponding to each of the second gray levels. The tenth fitting unit is used to determine the second determination coefficient corresponding to each of the second gray levels based on the maximum value among the multiple third pre-determination coefficients. The sixth relational expression can be: ;

[0270] Among them, f n The fifth square coefficient, g n f is the fifth linear coefficient, and h is the fifth constant. n Not equal to 0, g n h can be 0.

[0271] In this embodiment, the fitting unit 20 further includes a second determination subunit, which is used to determine whether the second determination coefficient is greater than the second threshold. If so, the second determination coefficient is the fitting determination coefficient.

[0272] In this embodiment, the fitting unit 20 further includes a third fitting subunit, which is used to obtain a third determination coefficient based on the image parameters of the gray level corresponding to the second determination coefficient that is less than or equal to the second threshold when the second determination subunit determines that the second determination coefficient is less than or equal to the second threshold. The third determination coefficient is the fitting determination coefficient.

[0273] In this embodiment, the third fitting subunit includes an eleventh fitting unit and a twelfth fitting unit. The eleventh fitting unit is used to establish a third relational expression for each of the third gray levels based on the image parameters corresponding to each of the third gray levels when the panel to be compensated displays the preset color image. The twelfth fitting unit is used to obtain a third determination coefficient for each of the third gray levels when the panel to be compensated displays the preset color image based on the third relational expression and the image parameters corresponding to each of the third gray levels. The third determination coefficient is the fitting determination coefficient. The three relational expressions are: p n q is the first cubic coefficient. n r is the second square coefficient. n The third linear coefficient, s is the third constant. pn Not equal to 0, q n r n s can be 0.

[0274] In this embodiment, the fitting unit 20 may further include a third fitting subunit, which includes a thirteenth fitting unit, a fourteenth fitting unit, and an acquisition unit. The thirteenth fitting unit is used to establish multiple fourth relational expressions corresponding to each gray level based on the image parameters corresponding to each gray level when the panel to be compensated displays the preset color image. The fourteenth fitting unit is used to acquire multiple first pre-determination coefficients corresponding to each gray level when the panel to be compensated displays the preset color image based on the multiple fourth relational expressions and the image parameters corresponding to each gray level. The acquisition unit is used to determine the maximum value among the multiple first pre-determination coefficients corresponding to the gray level as the fitting determination coefficient.

[0275] In this embodiment, the grayscale selection unit 30 includes a grayscale corresponding subunit and a representative grayscale output subunit. The grayscale corresponding subunit is used to obtain at least one corresponding grayscale interval according to the fitting determination coefficient of each grayscale. The representative grayscale output subunit is used to select at least one grayscale as the representative grayscale binding point in a grayscale interval.

[0276] In this embodiment, the compensation unit 40 includes a first acquisition subunit, a second acquisition subunit, and a compensation subunit. The first acquisition subunit is used to acquire a first compensation parameter corresponding to two adjacent grayscale binding points of the preset color. The second acquisition subunit is used to acquire a second compensation parameter corresponding to the grayscale in the grayscale interval between the two adjacent grayscale binding points according to the relationship formula corresponding to the fitting determination coefficients of multiple grayscale in the grayscale interval between the two adjacent grayscale binding points. The compensation subunit is used to perform display compensation on the panel to be compensated according to the first compensation parameter and the second compensation parameter.

[0277] In this embodiment, the panel to be compensated includes pixels, each pixel includes multiple types of sub-pixels, each type of sub-pixel corresponds to a different color, and the preset color includes the color corresponding to each type of sub-pixel.

[0278] The compensation device for the display panel provided in this embodiment of the invention obtains the grayscale binding points when the panel to be compensated displays the preset color light by obtaining the fitting determination coefficient based on the image parameter group when the panel to be compensated displays the preset color light. This helps to reduce the compensation error of other grayscales that were not selected as grayscale binding points and improve the white screen color deviation problem of the compensated display panel.

[0279] This invention discloses a compensation method and device for a display panel. The compensation method includes: obtaining image parameter sets corresponding to each gray level of the panel to be compensated when displaying a preset color image; obtaining fitting determination coefficients corresponding to each gray level of the panel to be compensated when displaying the preset color image based on the image parameter sets; obtaining gray level binding points of the preset color of the panel to be compensated based on the fitting determination coefficients; obtaining compensation parameters corresponding to the gray level binding points of the preset color; and performing display compensation on the panel to be compensated based on the compensation parameters corresponding to the gray level binding points. This invention obtains the gray level binding points of the panel to be compensated when displaying the preset color light by obtaining fitting determination coefficients from the image parameter sets of the panel to be compensated. This helps to reduce the compensation error of other gray levels that are not selected as gray level binding points and improves the white screen color shift problem of the compensated display panel.

[0280] The above provides a detailed description of a compensation method and device for a display panel provided by the embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A compensation method of a display panel, characterized by, The method comprises the following steps: obtaining image parameter groups corresponding to each gray scale of a display panel when displaying a preset color image; obtaining a fitting determination coefficient corresponding to each gray scale of the display panel when displaying the preset color image according to the image parameter groups; obtaining a preset color gray scale binding point of the display panel according to the fitting determination coefficient; obtaining a compensation parameter corresponding to the preset color gray scale binding point, and performing display compensation on the display panel according to the compensation parameter corresponding to the gray scale binding point. The preset color comprises at least one sub-pixel color of the display panel, and each image parameter group comprises at least one image parameter pair, each image parameter pair comprising a first light emitting current value and a first brightness value corresponding to the first light emitting current value. The step of obtaining the fitting determination coefficient corresponding to each gray scale of the display panel when displaying the preset color image according to the image parameter groups comprises the following steps: obtaining a first determination coefficient corresponding to each gray scale of the display panel when displaying the preset color image according to the image parameter groups corresponding to each gray scale; determining whether the first determination coefficient is greater than a first threshold value, and if yes, determining that the first determination coefficient is the fitting determination coefficient.

2. The compensation method of a display panel according to claim 1, wherein, The step of obtaining the first determination coefficient corresponding to each gray scale of the display panel when displaying the preset color image according to the image parameter groups corresponding to each gray scale comprises the following steps: establishing a first relationship formula corresponding to each gray scale according to the image parameter pairs corresponding to each gray scale of the display panel when displaying the preset color image; obtaining a first determination coefficient corresponding to each gray scale of the display panel when displaying the preset color image according to the first relationship formula corresponding to each gray scale and the image parameter pairs corresponding to each gray scale.

3. The compensation method of a display panel according to claim 1, wherein, The step of determining whether the first determination coefficient is greater than a first threshold value further comprises the following steps: if no, obtaining a second determination coefficient according to the image parameter pairs corresponding to the gray scale of the first determination coefficient less than or equal to the first threshold value; determining whether the second determination coefficient is greater than a second threshold value, and if yes, determining that the second determination coefficient is the fitting determination coefficient.

4. The compensation method of a display panel according to claim 3, wherein, The step of obtaining a second determination coefficient according to the image parameter pairs corresponding to the gray scale of the first determination coefficient less than or equal to the first threshold value comprises the following steps: establishing a second relationship formula corresponding to each second type of gray scale according to the image parameter pairs corresponding to each second type of gray scale of the display panel when displaying the preset color image; obtaining a second determination coefficient corresponding to each second type of gray scale of the display panel when displaying the preset color image according to the second relationship formula corresponding to each second type of gray scale and the image parameter pairs corresponding to each second type of gray scale. The second type of gray scale is the gray scale corresponding to the first determination coefficient less than or equal to the first threshold value.

5. The compensation method of a display panel according to claim 3, wherein, The step of determining whether the second determination coefficient is greater than a second threshold value further comprises the following steps: if no, obtaining a third determination coefficient according to the image parameter pairs corresponding to the gray scale of the second determination coefficient less than or equal to the second threshold value, and the third determination coefficient is the fitting determination coefficient.

6. The compensation method of a display panel according to claim 5, wherein, The step of obtaining a third decision coefficient according to the image parameter pair corresponding to the gray scale of the second decision coefficient less than or equal to the second threshold value, the third decision coefficient being the fitting decision coefficient, comprises: establishing a third relationship corresponding to each third type of gray scale according to the image parameter pair corresponding to each third type of gray scale when the panel to be compensated displays the preset color image; obtaining a third decision coefficient corresponding to each third type of gray scale when the panel to be compensated displays the preset color image according to the third relationship corresponding to each third type of gray scale and the image parameter pair corresponding to each third type of gray scale, the third decision coefficient being the fitting decision coefficient; wherein the third type of gray scale is the gray scale corresponding to the second decision coefficient less than or equal to the second threshold value.

7. The compensation method of a display panel according to claim 1, wherein, The step of obtaining a fitting decision coefficient corresponding to each gray scale when the panel to be compensated displays the preset color image according to the image parameter group, comprises: establishing a plurality of fourth relationships corresponding to each gray scale according to the image parameter pair corresponding to each gray scale when the panel to be compensated displays the preset color image; obtaining a plurality of first pre-decision coefficients corresponding to each gray scale when the panel to be compensated displays the preset color image according to the plurality of fourth relationships corresponding to each gray scale and the image parameter pair corresponding to each gray scale, respectively; determining the maximum value of the plurality of first pre-decision coefficients corresponding to the gray scale as the fitting decision coefficient.

8. The compensation method of a display panel according to any one of claims 1 to 7, characterized in that, The step of obtaining a gray scale binding point of a preset color of the panel to be compensated according to the fitting decision coefficient, comprises: obtaining at least one gray scale interval corresponding to the fitting decision coefficient; selecting at least one gray scale in one gray scale interval as the gray scale binding point; wherein the gray scales in one gray scale interval are consecutive.

9. The compensation method of a display panel according to claim 8, wherein, The gray scale binding point is selected from the endpoints of the gray scale interval.

10. The compensation method of a display panel according to claim 8, wherein, The step of obtaining a compensation parameter corresponding to the gray scale binding point of the preset color, and performing display compensation on the panel to be compensated according to the compensation parameter corresponding to the gray scale binding point, comprises: obtaining a first compensation parameter corresponding to adjacent two gray scale binding points of the preset color; obtaining a second compensation parameter corresponding to a plurality of gray scales in a gray scale interval between the adjacent two gray scale binding points according to a relationship corresponding to the fitting decision coefficient of the plurality of gray scales; performing display compensation on the panel to be compensated according to the first compensation parameter and the second compensation parameter.

11. The compensation method of a display panel according to claim 1, wherein The panel to be compensated comprises pixels, each pixel comprises a plurality of types of sub-pixels, each type of sub-pixel corresponds to a different color, and the preset color comprises the color corresponding to each type of sub-pixel.

12. A compensation device of a display panel, characterized by, It comprises: a parameter collection unit configured to obtain an image parameter group corresponding to each gray scale when a panel to be compensated displays a preset color image; a fitting unit configured to obtain a fitting decision coefficient corresponding to each gray scale when the panel to be compensated displays the preset color image according to the image parameter group; a gray scale selection unit configured to obtain a gray scale binding point of a preset color of the panel to be compensated according to the fitting decision coefficient. The compensation unit is configured to obtain compensation parameters corresponding to gray scale binding points of a preset color, and perform display compensation on the to-be-compensated panel according to the compensation parameters corresponding to the gray scale binding points. The preset color includes at least one sub-pixel color of the to-be-compensated panel, and the image parameter set includes at least one image parameter pair, each image parameter pair including a first light-emitting current value and a first luminance value corresponding to the first light-emitting current value. The fitting unit obtains the fitting determination coefficient corresponding to each gray scale of the to-be-compensated panel when displaying the preset color image according to the image parameter set, including: obtaining a first determination coefficient corresponding to each gray scale of the to-be-compensated panel when displaying the preset color image according to the image parameter set corresponding to each gray scale; determining whether the first determination coefficient is greater than a first threshold value, and if so, determining that the first determination coefficient is the fitting determination coefficient.

Images