Grayscale compensation method for display panel, apparatus and system

Abstract

A grayscale compensation method for a display panel, an apparatus and a system. The grayscale compensation method for a display panel comprises the following steps: acquiring a grayscale compensation reference value group of a display panel (S110); acquiring a current maximum brightness value and a current grayscale value of the display panel, and if the current maximum brightness value is any one of a plurality of binding point maximum brightness values, matching the current grayscale value with a plurality of binding point grayscale values, so as to obtain a corresponding grayscale compensation coefficient group from a grayscale compensation coefficient table corresponding to the current maximum brightness value, otherwise, first calculating the grayscale compensation coefficient table corresponding to the current maximum brightness value, and then matching the current grayscale value with the plurality of binding point grayscale values, so as to obtain a corresponding grayscale compensation coefficient group from the grayscale compensation coefficient table (S120); on the basis of the grayscale compensation reference value group and the grayscale compensation coefficient group, calculating a grayscale compensation value (S130); and compensating for the display panel on the basis of the grayscale compensation value (S140). The method can improve the flexibility and compensation effect of grayscale compensation.

Description

Grayscale compensation method, device and system for display panel Technical Field

[0001] The present invention relates to the field of grayscale compensation of display panels, and in particular to a grayscale compensation method, device and system for display panels. Background Art

[0002] As users' demands for display panels become increasingly stringent, the industry now generally adjusts multiple gamma curves to ensure optimal brightness, color, and performance across all grayscale levels at all brightness levels. This corrects brightness and color shifts caused by factors such as voltage, PWM dimming, and frequency, achieving the best possible color display. The gamma curve is used to adjust the brightness response of the display panel. By adjusting the gamma value, images at different brightness levels can be better rendered.

[0003] However, while this approach corrects color, it also makes grayscale compensation at different brightness levels more difficult. How to better compensate grayscale under the existing complex gamma architecture has become a very important issue. This requires considering factors such as the actual gamma and electrical conditions of the display panel, which are constantly changing. This requires that grayscale compensation at full brightness be sufficiently flexible and accurate, and be able to make corresponding adjustments for different display states.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to ordinary technicians in this field.

[0005] Summary of the Invention

[0006] In view of this, the present invention provides a grayscale compensation method, device, and system for a display panel to at least solve the above technical problems.

[0007] One aspect of the present invention provides a grayscale compensation method for a display panel, comprising the following steps:

[0008] Obtaining a grayscale compensation reference value group of a display panel;

[0009] Obtaining a current maximum brightness value and a current grayscale value of the display panel; if the current maximum brightness value is any one of a plurality of binding point maximum brightness values, obtaining a corresponding grayscale compensation coefficient group from a grayscale compensation coefficient table corresponding to the current maximum brightness value by matching the current grayscale value with the plurality of binding point grayscale values; otherwise, first calculating a grayscale compensation coefficient table corresponding to the current maximum brightness value, and then obtaining a corresponding grayscale compensation coefficient group from the grayscale compensation coefficient table by matching the current grayscale value with the plurality of binding point grayscale values;

[0010] Calculating a grayscale compensation value based on the grayscale compensation reference value group and the grayscale compensation coefficient group; and

[0011] The display panel is compensated based on the grayscale compensation value.

[0012] In some embodiments, obtaining a corresponding grayscale compensation coefficient group from a grayscale compensation coefficient table corresponding to the current maximum brightness value by matching the current grayscale value with the grayscale values ​​of multiple binding points includes the following steps:

[0013] If the current grayscale value is any one of a plurality of binding point grayscale values, the grayscale compensation coefficient group corresponding to the current grayscale value is obtained by matching from the grayscale compensation coefficient table corresponding to the current maximum brightness value; otherwise, the grayscale compensation coefficient group corresponding to the current grayscale value is obtained by linear interpolation calculation using the two grayscale compensation coefficient groups corresponding to the two binding point grayscale values ​​closest to the current grayscale value in the grayscale compensation coefficient table.

[0014] In some embodiments, the grayscale compensation coefficient table corresponding to the current maximum brightness value is first calculated, and then the corresponding grayscale compensation coefficient group is obtained from the grayscale compensation coefficient table by matching the current grayscale value with the grayscale values ​​of multiple binding points, including the following steps:

[0015] Obtaining the grayscale compensation coefficient table corresponding to the current maximum brightness value by calculating, through linear interpolation, two of the grayscale compensation coefficient tables closest to the current maximum brightness value from the plurality of grayscale compensation coefficient tables;

[0016] If the current grayscale value is any one of a plurality of binding point grayscale values, the grayscale compensation coefficient group corresponding to the current grayscale value is obtained by matching from the grayscale compensation coefficient table corresponding to the current maximum brightness value; otherwise, the grayscale compensation coefficient group corresponding to the current grayscale value is obtained by linear interpolation calculation using the two grayscale compensation coefficient groups corresponding to the two binding point grayscale values ​​closest to the current grayscale value in the grayscale compensation coefficient table.

[0017] In some embodiments, after the display panel is manufactured, the grayscale compensation reference value set is obtained by an optical extraction method at a reference maximum brightness value and stored in a storage module of the display panel.

[0018] In some embodiments, the grayscale compensation reference value group includes at least one grayscale compensation reference value, and the grayscale compensation coefficient group includes at least one grayscale compensation coefficient;

[0019] The number of the grayscale compensation reference values ​​is the same as the number of the grayscale compensation coefficients, and each of the grayscale compensation reference values ​​corresponds to one grayscale compensation coefficient.

[0020] In some embodiments, the grayscale compensation reference value group includes three grayscale compensation reference values, and the grayscale compensation coefficient group includes three grayscale compensation coefficients.

[0021] In some embodiments, the step of calculating the grayscale compensation value based on the grayscale compensation reference value group and the grayscale compensation coefficient group includes the following steps:

[0022] Each grayscale compensation reference value is multiplied by the corresponding grayscale compensation coefficient, and the sum is calculated to obtain the grayscale compensation value.

[0023] In some embodiments, compensating the display panel based on the grayscale compensation value comprises the following steps:

[0024] Using the current grayscale value as the input grayscale value;

[0025] Summing the input grayscale value and the grayscale compensation value to obtain an output grayscale value; and

[0026] The grayscale display of the display panel is adjusted according to the output grayscale value.

[0027] Another aspect of the present invention further provides a grayscale compensation device for a display panel, comprising:

[0028] A reference acquisition module, configured to acquire a grayscale compensation reference value group of a display panel;

[0029] a coefficient acquisition module, configured to acquire a current maximum brightness value and a current grayscale value of the display panel; if the current maximum brightness value is any one of a plurality of binding point maximum brightness values, then obtaining a corresponding grayscale compensation coefficient group from a grayscale compensation coefficient table corresponding to the current maximum brightness value by matching the current grayscale value with the grayscale values ​​of the plurality of binding points; otherwise, first calculating a grayscale compensation coefficient table corresponding to the current maximum brightness value, then obtaining a corresponding grayscale compensation coefficient group from the grayscale compensation coefficient table by matching the current grayscale value with the grayscale values ​​of the plurality of binding points;

[0030] a compensation calculation module, configured to calculate a grayscale compensation value based on the grayscale compensation reference value group and the grayscale compensation coefficient group; and

[0031] A compensation execution module is configured to compensate the display panel based on the grayscale compensation value.

[0032] Another aspect of the present invention further provides a grayscale compensation system for a display panel, comprising:

[0033] Display panel;

[0034] The grayscale compensation device is used to determine the grayscale compensation value of the display panel; and

[0035] A burning device is connected to the display panel and the grayscale compensation device, and is used for burning the grayscale compensation value into the display panel.

[0036] The beneficial effects of the present invention compared with the prior art include at least:

[0037] The grayscale compensation method, device and system of the display panel of the present invention provide a grayscale compensation method for the display panel. In a series of preset grayscale compensation coefficient tables, the grayscale compensation coefficient group most suitable for the current display state of the display panel is obtained by matching or calculating the current maximum brightness value and the current grayscale value, and the grayscale compensation value is calculated in combination with the grayscale compensation reference value group to perform grayscale compensation on the display panel. Targeted grayscale compensation values ​​can be provided for different maximum brightness values ​​and grayscale values, thereby improving the flexibility and compensation effect of grayscale compensation.

[0038] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings are incorporated into and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and it is clear that those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0040] FIG1 is a schematic flow chart showing a grayscale compensation method for a display panel provided by the present invention;

[0041] FIG2 is a schematic diagram showing a specific flow chart of step S140 in FIG1 ;

[0042] FIG3 is a schematic diagram showing a grayscale compensation device for a display panel provided by the present invention;

[0043] FIG4 is a schematic diagram showing a grayscale compensation system for a display panel provided by the present invention;

[0044] FIG5 is a schematic diagram showing a display device provided by the present invention. DETAILED DESCRIPTION

[0045] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Identical reference numerals in the figures represent identical or similar structures, and thus a repeated description thereof will be omitted.

[0046] The terms "first," "second," and similar terms used in the specific description do not denote any order, quantity, or importance, but are simply used to distinguish different components. Furthermore, in the description of the present invention, the terms "upper," "lower," and similar terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. These terms are used solely for ease of description and do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0047] It should be noted that, in the absence of conflict, the embodiments of the present invention and features in different embodiments may be combined with each other.

[0048] Through careful and in-depth research, the inventors of this case have provided a solution to the problems existing in the prior art. The present invention provides a grayscale compensation method, device and system for a display panel, wherein the grayscale compensation method for a display panel includes the following steps: obtaining a grayscale compensation reference value group of the display panel; obtaining the current maximum brightness value and the current grayscale value of the display panel, if the current maximum brightness value is any one of the maximum brightness values ​​of multiple binding points, then by matching the current grayscale value with the grayscale values ​​of the multiple binding points, a corresponding grayscale compensation coefficient group is obtained from the grayscale compensation coefficient table corresponding to the current maximum brightness value; otherwise, first calculate the grayscale compensation coefficient table corresponding to the current maximum brightness value, and then by matching the current grayscale value with the grayscale values ​​of the multiple binding points, a corresponding grayscale compensation coefficient group is obtained from the grayscale compensation coefficient table; calculate the grayscale compensation value based on the grayscale compensation reference value group and the grayscale compensation coefficient group; and compensate the display panel based on the grayscale compensation value. The present invention can provide targeted grayscale compensation values ​​for different maximum brightness values ​​and grayscale values, thereby improving the flexibility and compensation effect of grayscale compensation.

[0049] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0050] FIG1 is a flow chart showing a grayscale compensation method for a display panel provided by the present invention. As shown in FIG1 , the present invention provides a grayscale compensation method for a display panel, comprising the following steps:

[0051] S110, obtaining a grayscale compensation reference value group of a display panel;

[0052] S120: Obtain a current maximum brightness value and a current grayscale value of the display panel. If the current maximum brightness value is any one of the maximum brightness values ​​of the multiple binding points, obtain a corresponding grayscale compensation coefficient group from a grayscale compensation coefficient table corresponding to the current maximum brightness value by matching the current grayscale value with the grayscale values ​​of the multiple binding points. Otherwise, first calculate a grayscale compensation coefficient table corresponding to the current maximum brightness value, then obtain a corresponding grayscale compensation coefficient group from the grayscale compensation coefficient table by matching the current grayscale value with the grayscale values ​​of the multiple binding points.

[0053] S130, calculating a grayscale compensation value based on the grayscale compensation reference value group and the grayscale compensation coefficient group; and

[0054] S140 , compensating the display panel based on the grayscale compensation value.

[0055] It is worth noting that S110 to S140 are merely step numbers, intended to facilitate subsequent reference and avoid duplication, and are not intended to limit the order in which the steps of this method are to be performed. In other embodiments, the above steps of this method may be written in an alternate order, and the method is not limited thereto. Subsequent step numbers in the present invention all have the same meaning, and any duplication will not be repeated.

[0056] In step S110, after the display panel is prepared, a grayscale compensation reference value set is obtained at a reference maximum brightness value via an optical extraction method and stored in a storage module of the display panel. Specifically, the optical extraction method is a method for obtaining performance data of a display panel using optical equipment. In the present invention, the optical extraction method is used to obtain a grayscale compensation reference value set for the display panel at a reference maximum brightness value. The optical extraction method may include the following steps: preparing optical equipment; setting a reference maximum brightness value; collecting and analyzing data; extracting parameters; and establishing a grayscale compensation reference value set. The grayscale compensation reference value set includes at least one grayscale compensation reference value, typically three grayscale compensation reference values, to avoid poor grayscale compensation results due to too few grayscale compensation reference values, or an overly complex grayscale compensation process due to too many grayscale compensation reference values. The grayscale compensation reference value reflects the reference data for grayscale compensation of the display panel at the reference maximum brightness value, and may not achieve optimal grayscale compensation results at other maximum brightness values.

[0057] In step S120, the grayscale compensation coefficient group includes at least one grayscale compensation coefficient, wherein the number of grayscale compensation reference values ​​is the same as the number of grayscale compensation coefficients, and each grayscale compensation reference value corresponds to a grayscale compensation coefficient, which is used to adjust the contribution of the corresponding grayscale compensation reference value to the final grayscale compensation value. In a preferred embodiment, the grayscale compensation coefficient group includes three values, corresponding to the three grayscale compensation reference values, to avoid poor grayscale compensation effects caused by too few grayscale compensation reference values, and excessive complexity of the grayscale compensation process caused by too many grayscale compensation reference values.

[0058] Step S120 is intended to determine the current maximum brightness value and current grayscale value of the display panel based on the current display state of the display panel, and to obtain a corresponding grayscale compensation coefficient set based on the current maximum brightness value and current grayscale value, so as to combine the above-mentioned grayscale compensation reference value set to calculate the grayscale compensation value for the display panel in the current display state. Specifically, the present invention sets a certain number of binding point maximum brightness values, and sets multiple binding point grayscale values ​​for each binding point maximum brightness value. The binding point maximum brightness value is a series of intermediate points set between the lowest and highest brightness values ​​that the display panel can reach. The binding point grayscale value is a series of intermediate points set between the minimum and maximum grayscale values ​​that the display panel can reach at a certain maximum brightness value. The setting of the binding point maximum brightness value and the binding point grayscale value is used to preset a grayscale compensation coefficient table based on the multiple binding point grayscale values ​​at each binding point maximum brightness value, with each binding point maximum brightness value corresponding to a grayscale compensation coefficient table. Each binding point grayscale value in the grayscale compensation coefficient table corresponds to a grayscale compensation coefficient set. The following is an example of the grayscale compensation coefficient table corresponding to the maximum brightness value of the first binding point and the maximum brightness value of the fourth binding point:

[0059] The grayscale compensation coefficient table corresponding to the maximum brightness value of the first binding point is:

[0060] Among them, DBV represents the maximum brightness value, DBV0 represents the maximum brightness value of the first binding point, Gray represents the grayscale value, Gray1 represents the grayscale value of the first binding point, Gray3 represents the grayscale value of the second binding point, Gray5 represents the grayscale value of the third binding point, A represents the first grayscale compensation coefficient, B represents the second grayscale compensation coefficient, C represents the third grayscale compensation coefficient, kA_10 represents the specific value of the first grayscale compensation coefficient under the maximum brightness value of the first binding point and the grayscale value of the first binding point, kB_30 represents the specific value of the second grayscale compensation coefficient under the maximum brightness value of the first binding point and the grayscale value of the second binding point, kC_50 represents the specific value of the third grayscale compensation coefficient under the maximum brightness value of the first binding point and the grayscale value of the third binding point, and the same applies to other grayscale compensation coefficients.

[0061] The grayscale compensation coefficient table corresponding to the maximum brightness value of the fourth binding point is:

[0062] Among them, DBV3 represents the maximum brightness value of the fourth binding point, kA_13 represents the specific value of the first grayscale compensation coefficient under the maximum brightness value of the fourth binding point and the grayscale value of the first binding point, kB_33 represents the specific value of the second grayscale compensation coefficient under the maximum brightness value of the fourth binding point and the grayscale value of the second binding point, kC_53 represents the specific value of the third grayscale compensation coefficient under the maximum brightness value of the fourth binding point and the grayscale value of the third binding point, and the other grayscale compensation coefficients are deduced in the same way. The meanings of other identifiers are the same as those in the above-mentioned maximum brightness value of the first binding point, and the repeated parts are not repeated here.

[0063] In step S120, when the current maximum brightness value is any one of the maximum brightness values ​​of a plurality of binding points, “a corresponding grayscale compensation coefficient group is obtained from a grayscale compensation coefficient table corresponding to the current maximum brightness value by matching the current grayscale value with the grayscale values ​​of the plurality of binding points.” The method for obtaining the corresponding grayscale compensation coefficient group through the current grayscale value in the above-mentioned case specifically includes the following steps: if the current grayscale value is any one of the plurality of binding point grayscale values, a grayscale compensation coefficient group corresponding to the current grayscale value is obtained through matching from the grayscale compensation coefficient table corresponding to the current maximum brightness value; otherwise, a grayscale compensation coefficient group corresponding to the current grayscale value is calculated through linear interpolation using two grayscale compensation coefficient groups corresponding to the two binding point grayscale values ​​closest to the current grayscale value in the grayscale compensation coefficient table.

[0064] The following example illustrates "If the current grayscale value is any one of multiple binding point grayscale values, then the grayscale compensation coefficient group corresponding to the current grayscale value is obtained by matching from the grayscale compensation coefficient table corresponding to the current maximum brightness value." For example, if the current maximum brightness value is the same as the first maximum brightness value, referring to the grayscale compensation coefficient table corresponding to the first maximum brightness value, if the current grayscale value is the first binding point grayscale value (Gray1), the specific values ​​of the grayscale compensation coefficient group [A, B, C] are [kA_10, kB_10, kC_10]. Other situations are similar and will not be elaborated on.

[0065] The following example illustrates "calculating the grayscale compensation coefficient group corresponding to the current grayscale value by linear interpolation using the two grayscale compensation coefficient groups corresponding to the two binding point grayscale values ​​closest to the current grayscale value in the grayscale compensation coefficient table". Still taking the current maximum brightness value and the first maximum brightness value as an example, referring to the grayscale compensation coefficient table corresponding to the first maximum brightness value, if the current grayscale value is Gray2, where the value of Gray2 is between Gray1 and Gray3, then the specific value kA_20 of the first grayscale compensation coefficient A in the grayscale compensation coefficient group [A, B, C] is calculated by the following formula: kA_20 = kA_10 + (kA_30 - kA_10) / (Gray3 - Gray1) * (Gray2 - Gray1),

[0066] In addition, kB_20 and kC_20 are also calculated in the same way and will not be repeated here.

[0067] In step S120, if the current maximum brightness value is not the same as any of the multiple binding point maximum brightness values, then "a grayscale compensation coefficient table corresponding to the current maximum brightness value is first calculated, and then a corresponding grayscale compensation coefficient group is obtained from the grayscale compensation coefficient table by matching the current grayscale value with the grayscale values ​​of the multiple binding points." In this case, the method for obtaining the corresponding grayscale compensation coefficient group using the current grayscale value specifically includes the following steps:

[0068] S121, using linear interpolation method to calculate the grayscale compensation coefficient table corresponding to the current maximum brightness value from two grayscale compensation coefficient tables closest to the current maximum brightness value among the multiple grayscale compensation coefficient tables;

[0069] S122. If the current grayscale value is any one of a plurality of binding point grayscale values, the grayscale compensation coefficient group corresponding to the current grayscale value is obtained by matching from the grayscale compensation coefficient table corresponding to the current maximum brightness value; otherwise, the grayscale compensation coefficient group corresponding to the current grayscale value is obtained by linear interpolation calculation using the two grayscale compensation coefficient groups corresponding to the two binding point grayscale values ​​closest to the current grayscale value in the grayscale compensation coefficient table.

[0070] In step S121, since the current maximum brightness value is different from any of the maximum brightness values ​​of the multiple binding points, that is, there is no grayscale compensation coefficient table that directly corresponds to the current maximum brightness value in the preset multiple grayscale compensation coefficient tables, it is necessary to first calculate the grayscale compensation coefficient table that directly corresponds to the current maximum brightness value by linear interpolation. For example, if the current maximum brightness value is DBV2, and its specific value is between DBV0 and DBV3, the grayscale compensation coefficient table corresponding to DBV2 can be calculated with the help of the grayscale compensation coefficient tables corresponding to DBV0 and DBV3. The grayscale compensation coefficient table corresponding to DBV2 is as follows:

[0071] The meaning of the parameters in the grayscale compensation coefficient table corresponding to DBV2 can be referred to the grayscale compensation coefficient table corresponding to DBV0 and DBV3, which will not be repeated here. In this table, the grayscale compensation coefficient kA_12 value under DBV2 and Gray1 can be calculated by the following formula: kA_12=kA_10+(kA_13-kA_10) / (DBV3-DBV0)*(DBV2-DBV0),

[0072] In addition, the specific values ​​of other grayscale compensation coefficients in the above table can also be calculated in the same way, which will not be repeated here. At this point, the grayscale compensation coefficient table corresponding to the current maximum brightness value DBV2 is obtained.

[0073] In step S122, since the grayscale compensation coefficient table corresponding to the current maximum brightness value DBV2 has been obtained, a specific grayscale compensation coefficient set can be obtained based on this table and the current grayscale value. The specific method is the same as the method for "when the current maximum brightness value is any one of the maximum brightness values ​​of multiple binding points" and can be referred to above, so it will not be repeated here.

[0074] In step S130, the grayscale compensation value is calculated using the grayscale compensation reference value group and the grayscale compensation coefficient group. Specifically, each grayscale compensation reference value is multiplied by the corresponding grayscale compensation coefficient, and the sum is calculated to obtain the grayscale compensation value. In other words, the grayscale compensation value is calculated as follows: Offset = A*Offset_P0 + B*Offset_P1 + C*Offset_P2,

[0075] Wherein, Offset represents the grayscale compensation value, Offset_P0 represents the first grayscale compensation reference value, Offset_P1 represents the second grayscale compensation reference value, Offset_P2 represents the third grayscale compensation reference value, A represents the first grayscale compensation coefficient, B represents the second grayscale compensation coefficient, and C represents the third grayscale compensation coefficient.

[0076] For example, if the current maximum brightness value is DBV0 and the current grayscale value is Gray1, refer to the grayscale compensation coefficient table corresponding to DBV0. The specific value of A is kA_10, the specific value of B is kB_10, and the specific value of C is kC_10. At this time, the grayscale compensation value is: Offset_10 = kA_10*Offset_P0 + kB_10*Offset_P1 + kC_10*Offset_P2,

[0077] Wherein, Offset_10 is the grayscale compensation value when the current maximum brightness value is DBV0 and the current grayscale value is Gray 1. The grayscale compensation value calculation method in other cases is similar and will not be repeated here.

[0078] In this step, multiple grayscale compensation reference values ​​are used to calculate the grayscale compensation value, and a different grayscale compensation coefficient is matched to each grayscale compensation reference value. Compared with the existing technology, the grayscale compensation effect is improved, and at the same time, demura compensation can be better performed under the existing complex gamma architecture.

[0079] FIG2 is a schematic diagram showing a specific flow chart of step S140 in FIG1. ​​Step S140 includes the following steps:

[0080] S141, using the current grayscale value as the input grayscale value;

[0081] S142, summing the input grayscale value and the grayscale compensation value to obtain an output grayscale value; and

[0082] S143 , adjusting the grayscale display of the display panel according to the output grayscale value.

[0083] In step S140, the output grayscale value is obtained for adjusting the grayscale display of the display panel. Specifically, the output grayscale value is calculated by the following formula: GrayOut=GrayIn+Offset,

[0084] GrayOut represents the output grayscale value, GrayIn represents the input grayscale value, that is, the current grayscale value, and Offset represents the grayscale compensation value. The calculation method of Offset refers to the above step S130.

[0085] The grayscale compensation method for a display panel of the present invention matches or calculates the grayscale compensation coefficient set that best suits the current display state of the display panel by matching the current maximum brightness value and the current grayscale value within a series of preset grayscale compensation coefficient tables. Combined with the grayscale compensation reference value set, the grayscale compensation value is calculated to compensate the grayscale of the display panel. This method can provide targeted grayscale compensation values ​​for different maximum brightness values ​​and grayscale values, improving the flexibility and effectiveness of grayscale compensation. Furthermore, compared to existing technologies, the grayscale compensation method of the present invention has simpler logic and is easier to debug.

[0086] FIG3 is a schematic diagram of a grayscale compensation device for a display panel provided by the present invention. As shown in FIG3 , based on the same inventive concept, another embodiment of the present invention further provides a grayscale compensation device 10 for a display panel, configured to implement the aforementioned grayscale compensation method for a display panel. The grayscale compensation device 10 for a display panel comprises a reference acquisition module 11, a coefficient acquisition module 12, a compensation calculation module 13, and a compensation execution module 14. The reference acquisition module 11 is configured to acquire a grayscale compensation reference value set for the display panel. The coefficient acquisition module 12 is configured to acquire the current maximum brightness value and the current grayscale value of the display panel. If the current maximum brightness value is any one of multiple binding point maximum brightness values, the corresponding grayscale compensation coefficient set is obtained from a grayscale compensation coefficient table corresponding to the current maximum brightness value by matching the current grayscale value with the multiple binding point grayscale values. Otherwise, the grayscale compensation coefficient table corresponding to the current maximum brightness value is first calculated, and then the corresponding grayscale compensation coefficient set is obtained from the grayscale compensation coefficient table by matching the current grayscale value with the multiple binding point grayscale values. The compensation calculation module 13 is configured to calculate a grayscale compensation value based on the grayscale compensation reference value set and the grayscale compensation coefficient set. The compensation execution module 14 is configured to compensate the display panel based on the grayscale compensation value.

[0087] The grayscale compensation device for a display panel of the present invention utilizes the aforementioned grayscale compensation method for a display panel. By matching or calculating the current maximum brightness value and the current grayscale value from a series of preset grayscale compensation coefficient tables, the device obtains a grayscale compensation coefficient set that best suits the current display state of the display panel. Combined with a grayscale compensation reference value set, the device calculates a grayscale compensation value to compensate for the grayscale of the display panel. This method provides targeted grayscale compensation values ​​for different maximum brightness values ​​and grayscale values, improving the flexibility and effectiveness of grayscale compensation. Furthermore, compared to existing technologies, the grayscale compensation method of the present invention has simpler logic and is easier to debug.

[0088] Figure 4 shows a schematic diagram of a grayscale compensation system for a display panel provided by the present invention. As shown in Figure 4 , based on the same inventive concept, another embodiment of the present invention further provides a grayscale compensation system for a display panel, comprising a display panel 30, the grayscale compensation device 10 for a display panel described in the above embodiment, and a burning device 20. The grayscale compensation device 10 for a display panel is used to determine a grayscale compensation value for the display panel; the burning device 20 is connected to the display panel 30 and the grayscale compensation device 10 and is used to burn the grayscale compensation value into the display panel 30.

[0089] The grayscale compensation system of the display panel of the present invention, through the grayscale compensation method of the display panel mentioned above, obtains the grayscale compensation coefficient group that is most suitable for the current display state of the display panel by matching or calculating the current maximum brightness value and the current grayscale value in a preset series of grayscale compensation coefficient tables, and calculates the grayscale compensation value in combination with the grayscale compensation reference value group to perform grayscale compensation on the display panel. It can provide targeted grayscale compensation values ​​for different maximum brightness values ​​and grayscale values, thereby improving the flexibility and compensation effect of grayscale compensation.

[0090] Figure 5 shows a schematic diagram of a display device provided by the present invention. As shown in Figure 5 , based on the same inventive concept, another embodiment of the present invention further provides a display device 40 comprising the display panel 30 described above. This display device can be any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigation system. For implementation of this display device, reference can be made to the embodiment of the display panel 30 described above. Any overlap in the technical solutions and technical effects will not be repeated here.

[0091] In summary, the grayscale compensation method, device and system of the display panel of the present invention provide a grayscale compensation method for a display panel. In a series of preset grayscale compensation coefficient tables, the grayscale compensation coefficient group most suitable for the current display state of the display panel is obtained by matching or calculating the current maximum brightness value and the current grayscale value, and the grayscale compensation value is calculated in combination with the grayscale compensation reference value group to perform grayscale compensation on the display panel. It can provide targeted grayscale compensation values ​​for different maximum brightness values ​​and grayscale values, thereby improving the flexibility and compensation effect of grayscale compensation.

[0092] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A method for gray-scale compensation of a display panel, characterized in that, It includes the following steps: Obtain the gray-scale compensation reference value group of the display panel; Obtain the current maximum brightness value and the current gray-scale value of the display panel. If the current maximum brightness value is any one of the maximum brightness values of multiple binding points, then through the matching of the current gray-scale value with the gray-scale values of multiple binding points, obtain the corresponding gray-scale compensation coefficient group from the gray-scale compensation coefficient table corresponding to the current maximum brightness value. Otherwise, first calculate the gray-scale compensation coefficient table corresponding to the current maximum brightness value, and then through the matching of the current gray-scale value with the gray-scale values of multiple binding points, obtain the corresponding gray-scale compensation coefficient group from the gray-scale compensation coefficient table; Calculate the gray-scale compensation value based on the gray-scale compensation reference value group and the gray-scale compensation coefficient group; And Compensate the display panel based on the gray-scale compensation value.

2. The method for gray-scale compensation of a display panel according to claim 1, characterized in that, The step of obtaining the corresponding gray-scale compensation coefficient group from the gray-scale compensation coefficient table corresponding to the current maximum brightness value through the matching of the current gray-scale value with the gray-scale values of multiple binding points includes the following steps: If the current gray-scale value is any one of the gray-scale values of multiple binding points, then from the gray-scale compensation coefficient table corresponding to the current maximum brightness value, obtain the gray-scale compensation coefficient group corresponding to the current gray-scale value through matching. Otherwise, calculate the gray-scale compensation coefficient group corresponding to the current gray-scale value through linear interpolation using the two gray-scale compensation coefficient groups corresponding to the two binding point gray-scale values closest to the current gray-scale value in the gray-scale compensation coefficient table.

3. The method for gray-scale compensation of a display panel according to claim 1, characterized in that, The step of first calculating the gray-scale compensation coefficient table corresponding to the current maximum brightness value, and then obtaining the corresponding gray-scale compensation coefficient group from the gray-scale compensation coefficient table through the matching of the current gray-scale value with the gray-scale values of multiple binding points includes the following steps: Calculate the gray-scale compensation coefficient table corresponding to the current maximum brightness value through linear interpolation using the two gray-scale compensation coefficient tables closest to the current maximum brightness value in the multiple gray-scale compensation coefficient tables; If the current gray-scale value is any one of the gray-scale values of multiple binding points, then from the gray-scale compensation coefficient table corresponding to the current maximum brightness value, obtain the corresponding gray-scale compensation coefficient group through matching for the current gray-scale value pair Otherwise, calculate the gray-scale compensation coefficient group corresponding to the current gray-scale value through linear interpolation using the two gray-scale compensation coefficient groups corresponding to the two binding point gray-scale values closest to the current gray-scale value in the gray-scale compensation coefficient table.

4. The method for gray-scale compensation of a display panel according to claim 1, characterized in that, The gray-scale compensation reference value group is obtained by an optical extraction method under the reference maximum brightness value after the display panel is prepared, and is stored in the storage module of the display panel.

5. The method for gray-scale compensation of a display panel according to claim 1, characterized in that, The gray-scale compensation reference value group includes at least one gray-scale compensation reference value, and the gray-scale compensation coefficient group includes at least one gray-scale compensation coefficient; Wherein, the number of the gray-scale compensation reference values is the same as that of the gray-scale compensation coefficients, and each gray-scale compensation reference value corresponds to one gray-scale compensation coefficient.

6. The method for gray-scale compensation of a display panel according to claim 5, characterized in that, The gray-scale compensation reference value group includes three gray-scale compensation reference values, and the gray-scale compensation coefficient group includes three gray-scale compensation coefficients.

7. The method for gray-scale compensation of a display panel according to claim 1, characterized in that, Calculating the gray-scale compensation value based on the gray-scale compensation reference value group and the gray-scale compensation coefficient group includes the following steps: Multiply each of the gray-scale compensation reference values by the corresponding gray-scale compensation coefficient, and then sum them to obtain the gray-scale compensation value.

8. The method for gray-scale compensation of a display panel according to claim 1, characterized in that, Compensating the display panel based on the gray-scale compensation value includes the following steps: Use the current gray-scale value as the input gray-scale value; Sum the input gray-scale value and the gray-scale compensation value to obtain the output gray-scale value; and Adjust the gray-scale display of the display panel according to the output gray-scale value.

9. A device for gray-scale compensation of a display panel, characterized in that, It includes: A reference acquisition module for acquiring a gray-scale compensation reference value group of the display panel; A coefficient acquisition module for acquiring the current maximum brightness value and the current gray-scale value of the display panel. If the current maximum brightness value is any one of the maximum brightness values of multiple binding points, then through the matching of the current gray-scale value and the gray-scale values of multiple binding points, obtain the corresponding gray-scale compensation coefficient group from the gray-scale compensation coefficient table corresponding to the current maximum brightness value. Otherwise, first calculate the gray-scale compensation coefficient table corresponding to the current maximum brightness value, and then obtain the corresponding gray-scale compensation coefficient group from the gray-scale compensation coefficient table through the matching of the current gray-scale value and the gray-scale values of multiple binding points; A compensation calculation module for calculating the gray-scale compensation value based on the gray-scale compensation reference value group and the gray-scale compensation coefficient group; and A compensation execution module for compensating the display panel based on the gray-scale compensation value.

10. A grayscale compensation system for a display panel, characterized in that, It includes: A display panel; The gray-scale compensation device according to claim 9 for determining the gray-scale compensation value of the display panel; and A programming device, connected to the display panel and the gray-scale compensation device, for programming the gray-scale compensation value into the display panel.

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