Gray scale compensation method, device and system of display panel

Abstract

The invention provides a gray scale compensation method, device and system for a display panel. The gray scale compensation method for the display panel comprises the following steps: acquiring a gray scale compensation reference value group of the display panel; obtaining a current maximum brightness value and a current gray-scale value of the display panel, if the current maximum brightness value is any one of the maximum brightness values of the plurality of binding points, obtaining a corresponding gray-scale compensation coefficient group from a gray-scale compensation coefficient table corresponding to the current maximum brightness value through matching of the current gray-scale value and the gray-scale values of the plurality of binding points, otherwise, obtaining a corresponding gray-scale compensation coefficient group from a gray-scale compensation coefficient table corresponding to the current maximum brightness value; calculating a gray scale compensation coefficient table corresponding to the current maximum brightness value, and obtaining a 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 the plurality of binding points; calculating a gray scale compensation value based on the gray scale compensation reference value group and the gray scale compensation coefficient group; and compensating the display panel based on the gray scale compensation value. According to the invention, the flexibility and the compensation effect of gray scale compensation can be improved.

Description

Technical Field

[0001] The present invention relates to the field of gray-scale compensation for display panels, and specifically, to a method, device, and system for gray-scale compensation of a display panel. Background Art

[0002] As users' requirements for the display of display panels are getting higher and higher, in order to ensure that the brightness, color, and performance of each gray scale of the screen are optimal at all brightness levels, the industry currently generally adjusts multiple Gamma curves for the screen to correct the brightness and color offset phenomena caused by factors such as voltage, PWM dimming, and frequency, so as to achieve the best color display effect. The Gamma curve is a curve used to adjust the brightness response of a display panel. By adjusting the Gamma value, images at different brightness levels can be better presented.

[0003] However, although this approach corrects the color aspect, it also makes gray-scale compensation at different brightness levels more difficult. How to better perform gray-scale compensation under the existing complex Gamma architecture has become a very important issue, which requires considering factors such as the actual Gamma and electrical conditions of the display panel, and these factors are constantly changing. This requires that the gray-scale compensation has sufficient flexibility and accuracy across all brightness levels and be able to make corresponding adjustments for different display states.

[0004] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present invention, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0005] In view of this, the present invention provides a method, device, and system for gray-scale compensation of a display panel to at least solve the above technical problems.

[0006] One aspect of the present invention provides a method for gray-scale compensation of a display panel, including the following steps:

[0007] Obtain a gray-scale compensation reference value group of the display panel;

[0008] 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, obtain a 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 and the gray-scale values of multiple binding points. Otherwise, first calculate the gray-scale compensation coefficient table corresponding to the current maximum brightness value, and then obtain a 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;

[0009] Calculate a grayscale compensation value based on the grayscale compensation reference value group and the grayscale compensation coefficient group; and

[0010] Compensate the display panel based on the grayscale compensation value.

[0011] In some embodiments, obtaining the corresponding grayscale compensation coefficient group from the grayscale compensation coefficient table corresponding to the current maximum brightness value by matching the current grayscale value with multiple tied-point grayscale values includes the following steps:

[0012] If the current grayscale value is any one of the multiple tied-point grayscale values, obtain the grayscale compensation coefficient group corresponding to the current grayscale value by matching from the grayscale compensation coefficient table corresponding to the current maximum brightness value; otherwise, calculate the grayscale compensation coefficient group corresponding to the current grayscale value through linear interpolation using the two grayscale compensation coefficient groups corresponding to the two tied-point grayscale values closest to the current grayscale value in the grayscale compensation coefficient table.

[0013] In some embodiments, first calculating the grayscale compensation coefficient table corresponding to the current maximum brightness value, and then obtaining the corresponding grayscale compensation coefficient group from the grayscale compensation coefficient table by matching the current grayscale value with multiple tied-point grayscale values includes the following steps:

[0014] Calculate the grayscale compensation coefficient table corresponding to the current maximum brightness value through linear interpolation using the two grayscale compensation coefficient tables closest to the current maximum brightness value among the multiple grayscale compensation coefficient tables;

[0015] If the current grayscale value is any one of the multiple tied-point grayscale values, obtain the grayscale compensation coefficient group corresponding to the current grayscale value by matching from the grayscale compensation coefficient table corresponding to the current maximum brightness value; otherwise, calculate the grayscale compensation coefficient group corresponding to the current grayscale value through linear interpolation using the two grayscale compensation coefficient groups corresponding to the two tied-point grayscale values closest to the current grayscale value in the grayscale compensation coefficient table.

[0016] In some embodiments, the grayscale compensation reference value group is obtained by an optical extraction method at the reference maximum brightness value after the display panel is prepared and stored in the storage module of the display panel.

[0017] In some embodiments,

[0018] 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] Among them, the number of the grayscale compensation reference values is the same as that of the grayscale compensation coefficients, and each of the grayscale compensation reference values corresponds to one of the grayscale compensation coefficients.

[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, calculating the grayscale compensation value based on the grayscale compensation reference value group and the grayscale compensation coefficient group includes the following steps:

[0022] Multiply each of the grayscale compensation reference values by the corresponding grayscale compensation coefficient respectively, and then sum them to obtain the grayscale compensation value.

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

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

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

[0026] Adjust the grayscale display of the display panel according to the output grayscale value.

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

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

[0029] A coefficient acquisition module, 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, then through the matching of the current grayscale value with multiple binding point grayscale values, obtain the corresponding grayscale compensation coefficient group 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 through the matching of the current grayscale value with multiple binding point grayscale values, obtain the corresponding grayscale compensation coefficient group from the grayscale compensation coefficient table;

[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, 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, including:

[0033] Display panel;

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

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

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

[0037] The grayscale compensation method, device and system of the display panel of the present invention, by providing a grayscale compensation method for the display panel, in a preset series of grayscale compensation coefficient tables, obtains the grayscale compensation coefficient group most suitable for the current display state of the display panel through matching or calculation of the current maximum brightness value and the current grayscale value, and calculates the grayscale compensation value in combination with the grayscale compensation reference value group to perform grayscale compensation on the display panel, and can provide targeted grayscale compensation values for different maximum brightness values and grayscale values, improving the flexibility and compensation effect of grayscale compensation.

[0038] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0040] Figure 1 A flowchart showing a grayscale compensation method for a display panel provided by the present invention;

[0041] Figure 2 Showing Figure 1 A detailed flowchart of step S140 in;

[0042] Figure 3 A schematic diagram showing a grayscale compensation device for a display panel provided by the present invention;

[0043] Figure 4 A schematic diagram showing a grayscale compensation system for a display panel provided by the present invention;

[0044] Figure 5 A schematic diagram showing a display device provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their repetitive description will be omitted.

[0046] The terms "first", "second", and the like used in the detailed description do not denote any order, quantity, or importance, but are merely used to distinguish different components. In addition, in the description of the present invention, the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, which is only for convenience of description and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0047] It should be noted that, without conflict, the features in the embodiments of the present invention and those in different embodiments can 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 method, device, and system for gray-scale compensation of a display panel. The method for gray-scale compensation of the display panel includes the following steps: obtaining a set of gray-scale compensation reference values of the display panel; obtaining 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, obtaining a corresponding set of gray-scale compensation coefficients from the gray-scale compensation coefficient table corresponding to the current maximum brightness value. Otherwise, first calculating 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, obtaining a corresponding set of gray-scale compensation coefficients from the gray-scale compensation coefficient table; calculating a gray-scale compensation value based on the set of gray-scale compensation reference values and the set of gray-scale compensation coefficients; and compensating the display panel based on the gray-scale compensation value. The present invention can provide targeted gray-scale compensation values for different maximum brightness values and gray-scale values, improving the flexibility and compensation effect of gray-scale compensation.

[0049] The following further elaborates in detail on the specific embodiments of the present invention with reference to the accompanying drawings.

[0050] Figure 1 A flowchart showing a method for gray-scale compensation of a display panel provided by the present invention is shown. As Figure 1 shown, the present invention provides a method for gray-scale compensation of a display panel, including the following steps:

[0051] S110. Obtaining a set of gray-scale compensation reference values of the display panel;

[0052] S120. 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;

[0053] S130. Calculate the gray scale compensation value based on the gray scale compensation reference value group and the gray scale compensation coefficient group; and

[0054] S140. Compensate the display panel based on the gray scale compensation value.

[0055] It should be noted that S110 to S140 are only step numbers, and their function is to facilitate subsequent reference and avoid repeated text, rather than being used to limit the execution order of each step of this method. In other embodiments, the above steps of this method can also be written in a different order, and this is not limited thereto. The subsequent step numbers in the present invention have the same meaning, and the repeated parts will not be elaborated.

[0056] In step S110, the gray scale compensation reference value group is obtained by an optical extraction method at the reference maximum brightness value after the display panel is prepared and stored in the storage module of the display panel. Specifically, the optical extraction method is a method of obtaining the performance data of the display panel by using optical devices. In the present invention, the optical extraction method is used to obtain the gray scale compensation reference value group of the display panel at the reference maximum brightness value. The optical extraction method may include the following steps: prepare optical devices; set the reference maximum brightness value; collect and analyze data; extract parameters; establish the gray scale compensation reference value group. The gray scale compensation reference value group includes at least one gray scale compensation reference value. Usually, three gray scale compensation reference values are used to form a gray scale compensation reference value group to avoid poor gray scale compensation effects caused by too few gray scale compensation reference values and overly complex gray scale compensation processes caused by too many gray scale compensation reference values. The gray scale compensation reference value reflects the reference data for gray scale compensation of the display panel at the reference maximum brightness value, and may not achieve the best gray scale compensation effect 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 role of the corresponding grayscale compensation reference value in the final grayscale compensation value. In a preferred embodiment, the grayscale compensation coefficient group includes three values ​​to correspond to three grayscale compensation reference values, so as to avoid poor grayscale compensation effect caused by too few grayscale compensation reference values ​​and too complicated grayscale compensation process caused by too many grayscale compensation reference values.

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

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

[0060]

[0061] 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 other grayscale compensation coefficients are deduced accordingly.

[0062] The gray-scale compensation coefficient table corresponding to the maximum brightness value of the fourth binding point is as follows:

[0063]

[0064] Among them, DBV3 represents the maximum brightness value of the fourth binding point, kA_13 represents the specific value of the first gray-scale compensation coefficient under the maximum brightness value of the fourth binding point and the gray-scale value of the first binding point, kB_33 represents the specific value of the second gray-scale compensation coefficient under the maximum brightness value of the fourth binding point and the gray-scale value of the second binding point, kC_53 represents the specific value of the third gray-scale compensation coefficient under the maximum brightness value of the fourth binding point and the gray-scale value of the third binding point, and so on for other gray-scale compensation coefficients. 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 will not be elaborated.

[0065] In step S120, when the current maximum brightness value is any one of the maximum brightness values of multiple binding points, then "by matching 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". The method for obtaining the corresponding gray-scale compensation coefficient group through the current gray-scale value in the above case specifically includes the following steps: If the current gray-scale value is any one of the gray-scale values of multiple binding points, then obtain the gray-scale compensation coefficient group corresponding to the current gray-scale value by matching from the gray-scale compensation coefficient table corresponding to the current maximum brightness value; 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.

[0066] The following is an example to illustrate "If the current gray-scale value is any one of the gray-scale values of multiple binding points, then obtain the gray-scale compensation coefficient group corresponding to the current gray-scale value by matching from the gray-scale compensation coefficient table corresponding to the current maximum brightness value". Taking the case where the current maximum brightness value is the same as the first maximum brightness value as an example, referring to the above-mentioned gray-scale compensation coefficient table corresponding to the first maximum brightness value, if the current gray-scale value is the gray-scale value of the first binding point (Gray1), the values of the gray-scale compensation coefficient group [A, B, C] are specifically [kA_10, kB_10, kC_10]. Other cases are similar and will not be elaborated.

[0067] The following is an example to illustrate "in the gray-scale compensation coefficient table, for the two gray-scale values of the two binding points closest to the current gray-scale value, the two groups of gray-scale compensation coefficients are calculated by linear interpolation to obtain the group of gray-scale compensation coefficients corresponding to the current gray-scale value". Still taking the case where the current maximum brightness value is the same as the first maximum brightness value as an example, referring to the gray-scale compensation coefficient table corresponding to the above first maximum brightness value, if the current gray-scale value is Gray2, and the value of Gray2 is between Gray1 and Gray3, then the specific value kA_20 of the first gray-scale compensation coefficient A in the group of gray-scale compensation coefficients [A, B, C] is calculated by the following formula:

[0068] kA_20 = kA_10 + (kA_30 - kA_10) / (Gray3 - Gray1) * (Gray2 - Gray1),

[0069] In addition, kB_20 and kC_20 are also calculated in the same way and will not be elaborated here.

[0070] In step S120, when the current maximum brightness value is not the same as any of the multiple binding point maximum brightness values, then "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 multiple binding point gray-scale values, obtain the corresponding group of gray-scale compensation coefficients from the gray-scale compensation coefficient table". In the above case, the method of obtaining the corresponding group of gray-scale compensation coefficients through the current gray-scale value specifically includes the following steps:

[0071] S121. From the multiple gray-scale compensation coefficient tables, for the two gray-scale compensation coefficient tables closest to the current maximum brightness value, calculate the gray-scale compensation coefficient table corresponding to the current maximum brightness value by linear interpolation;

[0072] S122. If the current gray-scale value is any one of the multiple binding point gray-scale values, then from the gray-scale compensation coefficient table corresponding to the current maximum brightness value, obtain the corresponding group of gray-scale compensation coefficients by matching. Otherwise, for the two groups of gray-scale compensation coefficients corresponding to the two binding point gray-scale values closest to the current gray-scale value in the gray-scale compensation coefficient table, calculate the group of gray-scale compensation coefficients corresponding to the current gray-scale value by linear interpolation.

[0073] In step S121, since the current maximum brightness value is not the same as any one of the maximum brightness values of multiple binding points, that is, there is no directly corresponding gray-scale compensation coefficient table in the preset multiple gray-scale compensation coefficient tables, it is necessary to first calculate the gray-scale compensation coefficient table directly corresponding to the current maximum brightness value by the linear interpolation method. Exemplarily, if the current maximum brightness value is DBV2 and its specific value is between DBV0 and DBV3, the gray-scale compensation coefficient table corresponding to DBV2 can be calculated by means of the gray-scale compensation coefficient tables corresponding to DBV0 and DBV3. The gray-scale compensation coefficient table corresponding to DBV2 is as follows:

[0074]

[0075] The meanings of the parameters in the above gray-scale compensation coefficient table corresponding to DBV2 can be referred to the gray-scale compensation coefficient tables corresponding to DBV0 and DBV3, which will not be elaborated here. In this table, the gray-scale compensation coefficient kA_12 under DBV2 and Gray1 can be calculated by the following formula:

[0076] kA_12 = kA_10 + (kA_13 - kA_10) / (DBV3 - DBV0) * (DBV2 - DBV0),

[0077] In addition, the specific values of the other gray-scale compensation coefficients in the above table can also be calculated in the same way, which will not be elaborated here. So far, the gray-scale compensation coefficient table corresponding to the current maximum brightness value DBV2 has been obtained.

[0078] In step S122, since the gray-scale compensation coefficient table corresponding to the current maximum brightness value DBV2 has been obtained, the specific gray-scale compensation coefficient group can be obtained according to this table and the current gray-scale value. The specific method is the same as the method when "the current maximum brightness value is any one of the maximum brightness values of multiple binding points", which can refer to the above content and will not be elaborated here.

[0079] In step S130, this step aims to calculate the gray-scale compensation value through the gray-scale compensation reference value group and the gray-scale compensation coefficient group. The specific method is: multiply each gray-scale compensation reference value by the corresponding gray-scale compensation coefficient respectively, and then sum to obtain the gray-scale compensation value. That is, the calculation formula of the gray-scale compensation value is:

[0080] Offset = A * Offset_P0 + B * Offset_P1 + C * Offset_P2,

[0081] 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.

[0082] Exemplarily, if the current maximum brightness value is DBV0 and the current grayscale value is Gray1, referring 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:

[0083] Offset_10 = kA_10 * Offset_P0 + kB_10 * Offset_P1 + kC_10 * Offset_P2,

[0084] Wherein, Offset_10 is the grayscale compensation value when the current maximum brightness value is DBV0 and the current grayscale value is Gray1. The calculation method of the grayscale compensation value in other cases is similar and will not be elaborated here.

[0085] In this step, multiple grayscale compensation reference values are used to calculate the grayscale compensation value, and different grayscale compensation coefficients are matched for each grayscale compensation reference value, which improves the effect of grayscale compensation compared with the prior art and can better perform Demura compensation under the existing complex Gamma architecture.

[0086] Figure 2 Show Figure 1 The specific flowchart of step S140 in. Step S140 includes the following steps:

[0087] S141. Take the current grayscale value as the input grayscale value;

[0088] S142. Sum the input grayscale value and the grayscale compensation value to obtain the output grayscale value; and

[0089] S143. Adjust the grayscale display of the display panel according to the output grayscale value.

[0090] In step S140, the purpose is to obtain the output grayscale value for adjusting the grayscale display of the display panel. Specifically, the output grayscale value is calculated by the following formula:

[0091] GrayOut = GrayIn + Offset,

[0092] Among them, GrayOut represents the output gray scale value, GrayIn represents the input gray scale value, that is, the current gray scale value, and Offset represents the gray scale compensation value. The calculation method of Offset refers to the above step S130.

[0093] In the gray scale compensation method of the display panel of the present invention, in a preset series of gray scale compensation coefficient tables, the gray scale 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 gray scale value, and the gray scale compensation value is calculated in combination with the gray scale compensation reference value group to perform gray scale compensation on the display panel, which can provide targeted gray scale compensation values for different maximum brightness values and gray scale values, improving the flexibility and compensation effect of gray scale compensation. In addition, compared with the prior art, the logic of the gray scale compensation method of the present invention is simpler and more convenient to debug.

[0094] Figure 3 The schematic diagram of a gray scale compensation device for a display panel provided by the present invention is shown. As Figure 3 shown, based on the same inventive concept, an embodiment of another aspect of the present invention also provides a gray scale compensation device 10 for a display panel, which is used to implement the above-mentioned gray scale compensation method for the display panel. The gray scale compensation device 10 for the display panel includes: a reference acquisition module 11, a coefficient acquisition module 12, a compensation calculation module 13, and a compensation execution module 14. Among them, the reference acquisition module 11 is used to acquire the gray scale compensation reference value group of the display panel. The coefficient acquisition module 12 is used to acquire 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, the corresponding gray scale compensation coefficient group is obtained from the gray scale compensation coefficient table corresponding to the current maximum brightness value by matching the current gray scale value with the gray scale values of multiple binding points. Otherwise, the gray scale compensation coefficient table corresponding to the current maximum brightness value is first calculated, and then the corresponding gray scale compensation coefficient group is obtained from the gray scale compensation coefficient table by matching the current gray scale value with the gray scale values of multiple binding points. The compensation calculation module 13 is used to calculate the gray scale compensation value based on the gray scale compensation reference value group and the gray scale compensation coefficient group. The compensation execution module 14 is used to compensate the display panel based on the gray scale compensation value.

[0095] In the gray scale compensation device for the display panel of the present invention, through the above-mentioned gray scale compensation method for the display panel, in a preset series of gray scale compensation coefficient tables, the gray scale 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 gray scale value, and the gray scale compensation value is calculated in combination with the gray scale compensation reference value group to perform gray scale compensation on the display panel, which can provide targeted gray scale compensation values for different maximum brightness values and gray scale values, improving the flexibility and compensation effect of gray scale compensation. In addition, compared with the prior art, the logic of the gray scale compensation method of the present invention is simpler and more convenient to debug.

[0096] Figure 4 Schematic diagram showing a grayscale compensation system for a display panel provided by the present invention. As Figure 4 shown, based on the same inventive concept, an embodiment of another aspect of the present invention further provides a grayscale compensation system for a display panel, which includes a display panel 30, the grayscale compensation device 10 for the display panel in the above embodiment, and a programming device 20. Among them, the grayscale compensation device 10 for the display panel is used to determine the grayscale compensation value of the display panel; the programming device 20 is connected to the display panel 30 and the grayscale compensation device 10, and is used to program the grayscale compensation value into the display panel 30.

[0097] The grayscale compensation system for the display panel of the present invention, through the above grayscale compensation method for the display panel, in a preset series of grayscale compensation coefficient tables, matches or calculates the grayscale compensation coefficient group most suitable for the current display state of the display panel through the current maximum brightness value and the current grayscale value, and calculates the grayscale compensation value in combination with the grayscale compensation reference value group to perform grayscale compensation on the display panel, and can provide targeted grayscale compensation values for different maximum brightness values and grayscale values, improving the flexibility and compensation effect of grayscale compensation.

[0098] Figure 5 Schematic diagram showing a display device provided by the present invention. As Figure 5 shown, based on the same inventive concept, an embodiment of another aspect of the present invention further provides a display device 40, including the above display panel 30 provided by the embodiment of the present invention. The display device can be: any product or component with a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, etc. The implementation of the display device can refer to the embodiment of the above display panel 30, and the repeated technical solutions and technical effects will not be described again.

[0099] In summary, the grayscale compensation method, device, and system for the display panel of the present invention, by providing a grayscale compensation method for the display panel, in a preset series of grayscale compensation coefficient tables, matches or calculates the grayscale compensation coefficient group most suitable for the current display state of the display panel through the current maximum brightness value and the current grayscale value, and calculates the grayscale compensation value in combination with the grayscale compensation reference value group to perform grayscale compensation on the display panel, and can provide targeted grayscale compensation values for different maximum brightness values and grayscale values, improving the flexibility and compensation effect of grayscale compensation.

[0100] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the inventive concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A grayscale compensation method for a display panel, characterized in that, it includes the following steps: Obtain a grayscale compensation reference value group of the display panel; Obtain 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 through the matching of the current grayscale value with the grayscale values of multiple binding points, obtain the corresponding grayscale compensation coefficient group 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 through the matching of the current grayscale value with the grayscale values of multiple binding points, obtain the corresponding grayscale compensation coefficient group 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.

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

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

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

5. The grayscale compensation method for 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 gray-scale compensation method for 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 gray-scale compensation method for 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: Multiplying each gray-scale compensation reference value by the corresponding gray-scale compensation coefficient respectively, and then summing to obtain the gray-scale compensation value.

8. The gray-scale compensation method for 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: Taking the current gray-scale value as the input gray-scale value; Summing the input gray-scale value and the gray-scale compensation value to obtain the output gray-scale value; and Adjusting the gray-scale display of the display panel according to the output gray-scale value.

9. A gray-scale compensation device for a display panel, characterized in that it includes: A reference acquisition module for acquiring the 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 with the gray-scale values of multiple binding points, the corresponding gray-scale compensation coefficient group is obtained 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, the corresponding gray-scale compensation coefficient group is obtained from the gray-scale compensation coefficient table; 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 gray-scale 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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