Display Calibration Method, Device, Equipment and Storage Medium

Abstract

The present application discloses a display correction method, device, equipment and storage medium. The method includes: obtaining multiple groups of actual brightness ratios and corresponding actual response data of a pixel point in at least one sub-field conduction state; wherein, at least two groups of actual brightness ratios and corresponding actual response data are obtained in one sub-field conduction state, and the number of sub-field conductions in each different sub-field conduction state is different; generating a mapping relationship between the response data and the brightness ratio of the pixel point in each sub-field conduction state according to the multiple groups of actual brightness ratios and corresponding actual response data; correcting the correction coefficient of the pixel point according to the mapping relationship, and adjusting the target parameter of the pixel point according to the correction coefficient, and the target parameter includes at least one of brightness and chromaticity.

Description

Technical Field

[0001] This application relates to the technical field of display screens, and in particular, to a display correction method, device, equipment, and storage medium. Background Art

[0002] In order to solve the problem of inconsistent brightness and chromaticity of each pixel in an LED (Light Emitting Diode) display screen, the prior art usually adopts a point-by-point correction method to adjust all pixels of the LED display screen to a unified brightness and chromaticity. The correction coefficient adopted in the point-by-point correction method is determined based on the ratio between the conduction pulse width of the PWM (Pulse Width Modulation) data output by the LED constant current driving chip and the brightness of the LED lamp. When the ratio value between the conduction pulse width of the PWM data output by the LED constant current driving chip and the brightness of the LED lamp is 1, the display effect of the LED display screen is better.

[0003] In a display screen with highly integrated LED lamps, the conduction pulse width of the PWM data is small, and the LED constant current driving chip will ensure the normal conduction of the LED lamp by means of compensating the pulse width or compensating the current, etc. However, in the case where there is a compensated pulse width or compensated current in the display screen, the ratio between the conduction pulse width and the brightness is no longer a 1:1 linear relationship. Therefore, according to the current point-by-point correction method, the conduction pulse width of the PWM data when the LED lamp reaches the target brightness value and the target chromaticity value cannot be accurately obtained, and thus the respective LED lamps cannot be accurately adjusted to a unified brightness and chromaticity, resulting in a poor display correction effect and affecting the display effect of the display screen. Summary of the Invention

[0004] This application provides a display correction method, device, equipment, and storage medium, which solves the problem that the prior art cannot adjust the LED lamps to a unified brightness and chromaticity, effectively adjusts the LED lamps to a unified brightness and chromaticity, ensures the display correction effect, and improves the display effect of the display screen.

[0005] In a first aspect, this application provides a display correction method, including: obtaining multiple groups of actual brightness ratios and corresponding actual response data of a pixel point in at least one sub-field conduction state; generating a mapping relationship between the response data and the brightness ratio of the pixel point in each sub-field conduction state according to the obtained multiple groups of actual brightness ratios and corresponding actual response data; and correcting the correction coefficient of the pixel point according to the mapping relationship, and adjusting the target parameters of the pixel point according to the correction coefficient, where the target parameters include at least one of brightness and chromaticity. Among them, at least two groups of actual brightness ratios and corresponding actual response data are obtained in one sub-field conduction state, and the number of sub-field conductions in each different sub-field conduction state is different.

[0006] In a second aspect, the present application provides a display correction device, including: a data acquisition module, a mapping relationship determination module, and a display correction module.

[0007] The above-mentioned data acquisition module is configured to acquire multiple groups of actual brightness ratios and corresponding actual response data of pixel points in at least one sub-field conduction state; wherein, at least two groups of actual brightness ratios and corresponding actual response data are acquired in one sub-field conduction state, and the number of sub-fields conducted in different sub-field conduction states is different.

[0008] The above-mentioned mapping relationship determination module is configured to generate a mapping relationship between the response data and the brightness ratio of pixel points in each sub-field conduction state according to multiple groups of actual brightness ratios and corresponding actual response data.

[0009] The above-mentioned display correction module is configured to correct the correction coefficient of pixel points according to the mapping relationship, and adjust the target parameters of pixel points according to the correction coefficient, where the target parameters include at least one of brightness and chromaticity.

[0010] In a third aspect, the present application provides a display correction device, which includes: one or more processors, a storage device; the storage device stores one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the display correction method as described in the first aspect.

[0011] In a fourth aspect, the present application provides a storage medium containing computer-executable instructions, and the computer-executable instructions are used to execute the display correction method as described in the first aspect when executed by a computer processor.

[0012] In a fifth aspect, the present application provides a computer program product, which includes computer instructions. When the computer instructions run on a display correction device, the display correction device is caused to execute the display correction method as described in the first aspect.

[0013] According to the working principle of the LED lamp, the working process of the LED lamp is divided into multiple sub - field conduction states in this application. Based on the actual response data and actual brightness ratio of the LED lamp in different sub - field conduction states, the mapping relationship between the response data and the brightness ratio of the LED lamp in different sub - field conduction states is determined. The mapping relationship in each sub - field conduction state accurately represents the linear relationship between the response data and the brightness ratio of the LED lamp when there is a compensation pulse width or a compensation current. Based on the mapping relationship, the chromaticity correction coefficient of the LED lamp when there is a compensation pulse width or a compensation current can be accurately determined. By adjusting the response data output by the LED constant - current driving chip to the LED lamp through the chromaticity correction coefficient, each LED lamp can display the same brightness and chromaticity under the action of the corresponding response data, ensuring the unity of the brightness and chromaticity of each LED lamp and improving the display effect of the display screen.

[0014] Compared with the method of detecting point - by - point and gray - level - by - gray - level, where the actual response data and actual brightness ratio corresponding to each input data are collected to establish a one - to - one correspondence between the response data and the brightness ratio, in this application, through multiple groups of actual response data and actual brightness ratios in different sub - field conduction states, the mapping relationship in different sub - field conduction states can be accurately determined without collecting the actual response data and actual brightness ratio point - by - point, greatly reducing the amount of collected data and significantly reducing the collection time. Brief Description of the Drawings

[0015] Figure 1 is a flowchart of a display correction method provided by an embodiment of this application;

[0016] Figure 2 is a schematic diagram of the sub - field conduction duration when compensating the pulse width provided by an embodiment of this application;

[0017] Figure 3 is a first schematic diagram of the actual mapping relationship and the ideal linear relationship provided by an embodiment of this application;

[0018] Figure 4 is a flowchart of obtaining the actual response data and the corresponding actual brightness ratio provided by an embodiment of this application;

[0019] Figure 5 is a flowchart of determining each mapping relationship based on the mapping relationship in one sub - field conduction state provided by an embodiment of this application;

[0020] Figure 6 is a flowchart of determining each mapping relationship based on the mapping relationships in multiple sub - field conduction states provided by an embodiment of this application;

[0021] Figure 7 is a flowchart of correcting the brightness correction coefficient provided by an embodiment of this application;

[0022] Figure 8 It is a flowchart for determining expected response data based on a mapping relationship provided by an embodiment of the present application;

[0023] Figure 9 It is a second schematic diagram of the actual mapping relationship and the ideal linear relationship provided by an embodiment of the present application;

[0024] Figure 10 It is a schematic structural diagram of a display correction device provided by an embodiment of the present application;

[0025] Figure 11 It is a schematic structural diagram of a display correction device provided by an embodiment of the present application. Detailed implementation manners

[0026] In order to make the objectives, technical solutions and advantages of the present application clearer, the following further describes the specific embodiments of the present application in detail with reference to the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. Additionally, it should be noted that for the sake of convenience of description, only parts related to the present application are shown in the accompanying drawings rather than all the content. Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the operations (or steps) as sequential processes, many of the operations can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the operations can be rearranged. When the operations are completed, the process can be terminated, but there may also be additional steps not included in the drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0027] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0028] The display correction method provided in this embodiment can be executed by a display correction device. The display correction device can be implemented in software and / or hardware. The display correction device can be composed of two or more physical entities, or can be composed of one physical entity. For example, the display correction device can be a processor of a display screen, or can be the display screen itself.

[0029] The display correction device is installed with at least one type of operating system, wherein the operating system includes but is not limited to Android system, Linux system and Windows system. The display correction device can install at least one application based on the operating system, and the application can be an application that comes with the operating system or an application downloaded from a third-party device or server. In an embodiment, the display correction device has at least an application that can execute the display correction method.

[0030] For ease of understanding, this embodiment is described by taking a display screen as an example of a main body for executing the display correction method.

[0031] In one embodiment, the brightness correction process is to adjust the brightness ratio of each LED lamp to make the brightness of each LED lamp uniform, and the chromaticity correction process is to adjust the primary color brightness ratio and the complementary color brightness ratio of the LED lamp to make the chromaticity of each LED lamp uniform. Therefore, both brightness correction and chromaticity correction are achieved by adjusting the brightness ratio of the LED lamp.

[0032] This embodiment takes the brightness correction process of an LED lamp as an example to describe the technical problems existing in the existing display correction method.

[0033] Exemplarily, the maximum effective bit width of the input data of the LED constant current driver chip is a 16-bit binary number, so the input data range of the LED constant current driver chip is 0 to 65535. In the absence of correction, the LED constant current driver chip responds to the input data, compares the input data with the maximum input data, and obtains the conduction pulse width of the PWM data output by the LED constant current driver chip to the LED lamp. For example: the input data is D, the conduction pulse width is E, and E=D / 65535 at this time. Assuming that the maximum brightness of the LED lamp under a certain color channel is Lmax, the output brightness of the LED lamp under the action of the conduction pulse width of D / 65535 is L=(D / 65535)*Lmax. Since the value of D / 65535 is between 0 and 1, it is equal to the proportion of the output brightness of the LED lamp in the maximum brightness, so the conduction pulse width output by the LED constant current driver chip to the LED lamp and the brightness ratio of the LED lamp are linearly related with a slope of 1.

[0034] In this embodiment, when the brightness of each LED light on the display screen is inconsistent, the brightness ratio of each LED light can be adjusted to a uniform brightness value.

[0035] Exemplarily, based on the adjusted brightness value of the LED lamp, determine the brightness ratio when the LED is adjusted to this brightness value, and based on the 1:1 linear relationship between the brightness ratio and the conduction pulse width, determine the conduction pulse width output by the LED constant current drive chip. Determine the input data actually input to the LED constant current drive chip according to this conduction pulse width, and divide this input data by the input data of the display screen to each LED constant current drive chip to obtain the brightness correction coefficient. Adjust the relationship formula between the input data and the conduction pulse width of the LED constant current drive chip through this brightness correction coefficient, so that the LED constant current drive chip outputs the corresponding conduction pulse width to the LED lamp, enabling the LED lamp to display the brightness corresponding to the brightness ratio.

[0036] Assume that the brightness correction coefficient is M, the conduction pulse width E output by the corrected control chip = M*(D / 65535), and the output brightness L of the LED lamp after correction = M*(D / 65535)*Lmax.

[0037] However, due to the continuous increase in the scanning number of the LED display screen, and the large-scale application of 4in1 packaging or COB technology and miniLED technology, the integration of LED lamps is getting higher and higher, resulting in a decrease in the drive current of a single LED lamp. At the same time, in order to achieve a higher number of gray levels, when the LED constant current drive chip controls the LED lamp through PWM data, the base frequency of the PWM data is also getting higher and higher, resulting in a smaller and smaller conduction pulse width of the PWM data. Therefore, when the input data is small, the LED lamp may not conduct normally or conduct incompletely, etc. To avoid this situation, manufacturers will use means such as compensating pulse width or compensating current to solve the problem of abnormal display of the LED lamp at low input. However, since the compensating pulse width or compensating current will affect the conduction pulse width of the PWM data, the conduction pulse width and the brightness ratio no longer maintain a 1:1 linear relationship.

[0038] The existing display correction method determines the brightness correction coefficient based on the linear relationship with a slope of 1 between the conduction pulse width and the brightness ratio. This brightness correction coefficient cannot adjust each LED lamp to the same brightness, so the existing display correction method is not applicable to some display screens.

[0039] Specifically, when adjusting the chromaticity of the LED lamp through the existing display correction method, since the value of the complementary color attenuation ratio in the chromaticity correction matrix is very small, the chromaticity correction matrix determined based on the 1:1 linear relationship between the conduction pulse width and the brightness ratio has a very large error, resulting in a very poor chromaticity correction effect.

[0040] To solve the above problems, this embodiment provides a display correction method to adjust each LED lamp to the same brightness and chromaticity.

[0041] Figure 1The flowchart of a display calibration method provided by an embodiment of the present application is given. Refer to Figure 1 , the display calibration method specifically includes:

[0042] S110. Obtain multiple groups of actual brightness ratios and corresponding actual response data of a pixel point in at least one sub-field conduction state; wherein, at least two groups of actual brightness ratios and corresponding actual response data are obtained in one sub-field conduction state, and the number of sub-fields conducting in each different sub-field conduction state is different.

[0043] The display process of a pixel point is equivalent to the working process of an LED lamp. The working process of the LED lamp is as follows: The LED constant current driving chip divides the input data according to the minimum division unit and the number of sub-fields, and distributes the divided data to each sub-field one by one to make the sub-field to which the data is distributed conduct. Among them, the number of sub-fields is the number of times required to completely scan the display screen within one frame duration determined by the LED constant current driving chip according to the frame duration and the frequency of the gray scale decoding clock when driving and scanning the display screen.

[0044] Exemplarily, assume that the number of sub-fields is N, the minimum division unit is n, and the input data is D. If D < n * N, the ceiling value of D / n is the number of sub-fields conducting, and the remainder of D / n is the data amount allocated to the last conducting sub-field.

[0045] For example, if D = 60, n = 8, when A is 65536, the number of sub-fields N = 64, then the current number of sub-fields conducting is 8, the first 7 sub-fields are each allocated 8 data amounts, and the 8th sub-field is allocated 4 data. If D ≥ n * N, then each sub-field conducts, and the data amount allocated to each sub-field ≥ n.

[0046] In this embodiment, the conduction pulse width output by the LED constant current driving chip is determined by the sub-field conduction duration and the number of sub-fields conducting. The sub-field conduction duration is equal to the data amount allocated to the sub-field multiplied by the gray scale decoding clock. Among them, the gray scale decoding clock is the duration of the minimum pulse width, which is equal to 1 / A. At the moment when the sub-field conducts, the LED constant current driving chip will compensate the output conduction pulse width or output current to extend the sub-field conduction time to ensure that the LED lamp can respond to at least one minimum pulse width duration.

[0047] Figure 2 is a schematic diagram of the sub-field conduction duration when compensating the pulse width provided by an embodiment of the present application. As Figure 2 shown, the actual conduction duration of this sub-field is equal to the sum of the conduction duration Ta determined according to the data amount and the gray scale decoding clock and the compensation duration Tb. And the sub-field that does not conduct, that is, the sub-field that is not allocated a data amount, will not compensate the corresponding pulse width or current, so that each additional conducting sub-field will increase a compensation duration Tb.

[0048] Figure 3 This is a first schematic diagram of the actual mapping relationship and the ideal linear relationship provided by the embodiment of the present application. Figure 3 As shown, when the conduction pulse width is compensated for pulse width or current compensation, the brightness ratio and the conduction pulse width satisfy the actual mapping relationship 11, and the constant parameters of the actual mapping relationship 11 change with the change of the conduction pulse width. When the number of sub-fields turned on remains unchanged, the constant parameters of the actual mapping relationship 11 remain unchanged. However, the brightness ratio will have a step jump at the dividing point of each sub-field conduction. When the number of sub-fields turned on changes, the constant parameters of the actual mapping relationship 11 also change accordingly. Therefore, under different sub-field conduction states, the brightness ratio of the LED lamp satisfies different mapping relationships with the conduction pulse width. Among them, the corresponding number of sub-fields are turned on one by one from front to back in each sub-field conduction state.

[0049] refer to Figure 3 In an ideal situation, the LED lamp can be turned on and off instantaneously, that is, there is no need to perform pulse width compensation or current compensation on the sub-field conduction. At this time, the brightness ratio and the conduction pulse width satisfy the ideal linear relationship 12 with a slope of 1. Except when the input data is the maximum value, when the brightness ratio is the same, the conduction pulse width obtained based on the ideal linear relationship 12 and the actual mapping relationship 11 is different. If the conduction pulse width is subjected to pulse width compensation or current compensation, the conduction pulse width corresponding to the adjusted brightness ratio is determined based on the ideal linear relationship 12, but due to the existence of the compensation pulse width or the compensation current, the actual conduction pulse width of the LED lamp given by the LED constant current driver chip will be larger, so that the brightness emitted by the LED lamp is greater than the expected brightness, resulting in poor brightness and chromaticity correction effect performed according to the brightness and chromaticity correction coefficient obtained by the traditional point-by-point correction method, and the display accuracy of the LED lamp is reduced. Therefore, the present embodiment aims to accurately adjust the brightness value of the LED lamp according to the actual mapping relationship 11.

[0050] The actual response data refers to the conduction pulse width output to the LED lamp by the LED constant current driver chip in response to the current input data; the actual brightness ratio refers to the brightness ratio of the LED lamp under the action of the corresponding conduction pulse width. For example, assuming that the brightness correction coefficient is set to 1, so that the relationship between the conduction pulse width and the input data satisfies E=D / A, then according to the relationship E=D / A, the actual conduction pulse width under each input data condition can be determined, and the brightness of the LED lamp under the action of the actual conduction pulse width is collected accordingly, and the brightness is compared with the maximum brightness of the LED lamp to obtain the actual brightness ratio corresponding to the actual response data.

[0051] The number of sub-fields that are turned on in the LED lamp is determined by the input data, and accordingly, the sub-field turn-on state that the LED lamp satisfies is also determined by the input data. Therefore, the input data can be adjusted to control the LED lamp to satisfy each sub-field turn-on state, thereby obtaining the actual response data and the corresponding actual brightness ratio under various sub-field turn-on states.

[0052] Exemplarily, Figure 4 is a flowchart for obtaining actual response data and corresponding actual brightness ratios provided by an embodiment of the present application. As Figure 4 shown, the steps for obtaining actual response data and corresponding actual brightness ratios specifically include S1101 - S1102:

[0053] S1101. Determine the input data range of pixel points in the on - state of each sub - field according to the preset number of sub - fields and the preset minimum segmentation unit.

[0054] Exemplarily, when the input data D satisfies (i - 1)*n + 1 ≤ D ≤ i*n and i < N, the LED lamp satisfies the sub - field on - state with the number of sub - fields on being i. Therefore, the input data range corresponding to the sub - field on - state with the number of sub - fields on being i is [(i - 1)*n + 1, i*n]. When the input data D satisfies D ≥ (N - 1)*n + 1, the LED lamp satisfies the sub - field on - state with the number of sub - fields on being N. Therefore, the input data range corresponding to the sub - field on - state with the number of sub - fields on being N is [(N - 1)*n + 1, A]. Where N is the number of sub - fields, n is the minimum segmentation unit, i is a positive integer less than N, and A is the maximum input data.

[0055] S1102. Obtain at least two groups of actual brightness ratios and corresponding actual response data in the corresponding sub - field on - state according to the input data range.

[0056] Exemplarily, select multiple values in the input data range [(i - 1)*n + 1, i*n] as the input data of the LED constant - current driving chip to control the LED lamp to satisfy the sub - field on - state with the number of sub - fields on being i. Select multiple values in the input data range [(N - 1)*n + 1, A] as the input data of the LED constant - current driving chip to control the LED lamp to satisfy the sub - field on - state with the number of sub - fields on being N. When each input data is set, collect the actual brightness ratio and actual response data under the action of this input data to obtain multiple groups of actual response data and corresponding actual brightness ratios in this sub - field on - state.

[0057] In this embodiment, when the input data is equal to one, or when the input data is equal to the minimum segmentation unit, or when the input data is equal to the product of the minimum segmentation unit and the number of sub-fields, or when the input data is equal to the preset input threshold, the corresponding actual brightness ratio and actual response data are obtained. Exemplarily, the input threshold refers to the maximum value of the input data. When the input data is equal to one and the minimum segmentation unit, the LED is in the sub-field conduction state with the number of sub-field conductions being 1. When the input data is equal to the product of the minimum segmentation unit and the number of sub-fields, the preset input threshold, and half of the input threshold, the LED is in the sub-field conduction state with the number of sub-field conductions being N. When the input data is equal to the above several situations, multiple groups of actual response data and the corresponding actual brightness ratios can be obtained in two sub-field conduction states.

[0058] S120. Generate a mapping relationship between the response data and the brightness ratio of the pixel point in each sub-field conduction state according to multiple groups of actual brightness ratios and the corresponding actual response data.

[0059] Exemplarily, the dependent variable of the mapping relationship in each sub-field conduction state is the brightness ratio, the independent variable of the mapping relationship is the response data, the independent variable corresponds to a change range, and the mapping relationship and the change range corresponding to the independent variable are segmented and combined to obtain the actual mapping relationship between the response data and the brightness ratio.

[0060] In one embodiment, the actual mapping relationship between the brightness ratio and the conduction pulse width can be deduced from the relationship formula between the input data and the brightness ratio. Exemplarily, in the case of pulse width compensation or current compensation, the relationship between the input data and the brightness ratio satisfies the following formula:

[0061]

[0062] Where, I is the brightness ratio, D is the input data, A is the maximum input data, and K and B are constant term coefficients. K*(D - i) / A + i*B is the relationship formula between the input data and the brightness ratio when the number of sub-field conductions is i, and K*(D - N) / A + i*B is the relationship formula between the input data and the brightness ratio when the number of sub-field conductions is N.

[0063] K is equivalent to the ramp change of the brightness ratio brought by the minimum pulse width duration after removing the step change of the first conduction of the sub-field, and B is equivalent to the step change of the brightness ratio brought by the increased conduction pulse width duration through the compensation pulse width or compensation current when each sub-field is first conducted.

[0064] It should be noted that the compensated pulse width duration includes the duration of the minimum pulse width at the moment when the sub-field is turned on, that is, there will be a duration of the minimum pulse width in each turned-on sub-field to generate a step change in the brightness ratio together with the compensated pulse width, and the duration of the remaining minimum pulse widths is used to bring a ramp change to the brightness ratio. Therefore, the relationship between the input data and the brightness ratio when the number of turned-on sub-fields is i can be understood as that i data amounts in the input data D are used to generate a step change in the brightness ratio, and D - i data amounts in the input data are used to generate a ramp change in the brightness ratio.

[0065] Exemplarily, multiple input data and the corresponding actual brightness ratios can be substituted into the above relationship, and K and B can be deduced by combining multiple relationships.

[0066] In this embodiment, based on the relationship E = D / A that holds between the input data D and the turned-on pulse width E, the relationship between the input data and the brightness ratio is deduced, and the actual mapping relationship between the brightness ratio I and the turned-on pulse width E can be obtained as follows:

[0067]

[0068] Among them, the mapping relationship of the turned-on state of the sub-field with the number of turned-on sub-fields being i is I = K * E + i * (B - K / A), and the mapping relationship of the turned-on state of the sub-field with the number of turned-on sub-fields being N is I = K * E + N * (B - K / A). ((i - 1) * n + 1) / A ≤ E ≤ i * n / A and ((N - 1) * n + 1) / A ≤ E ≤ 1 are the change ranges of the turned-on pulse widths corresponding to the mapping relationships.

[0069] In another embodiment, the mapping relationship I = K * E + i * (B - K / A) of the turned-on state of the sub-field with the number of turned-on sub-fields being i can be simplified to I = k * E + b, where k is the slope and b is the intercept. To obtain the mapping relationship of the turned-on state of the sub-field, two sets of actual turned-on pulse widths and the corresponding actual brightness ratios in the turned-on state of the sub-field can be substituted into I = k * E + b, and k and b can be solved simultaneously, and then the mapping relationship in the turned-on state of the sub-field can be obtained. The mapping relationship of the turned-on state of the sub-field with the number of turned-on sub-fields being N is the same.

[0070] In this embodiment, according to multiple sets of actual brightness ratios and corresponding actual response data of a pixel point in each sub-field conduction state, the mapping relationship in the corresponding sub-field conduction state is determined. Exemplarily, in actual situations, the slopes and intercepts of the mapping relationships in different sub-field conduction states are different. To ensure the accuracy of calculation, two sets of actual brightness ratios and corresponding actual response data in each sub-field conduction state can be detected. According to the two sets of actual brightness ratios and corresponding actual response data in the same sub-field conduction state, the intercept and slope of the mapping relationship in this sub-field conduction state can be determined. Assuming the number of sub-fields is 64 and each LED lamp includes 64 sub-field conduction states, each LED lamp needs to detect at least 128 sets of data, so the amount of detected data is large and the calculation process is relatively slow.

[0071] In another embodiment, since each time the number of sub-field conductions increases by one, a new compensation pulse width is added to the conduction pulse width, causing a step change in the brightness ratio. Each newly added compensation pulse width is the same, and the step changes in the brightness ratio can be approximated as equal. Therefore, the intercept of the mapping relationship in the sub-field conduction state can be approximated as the product of the corresponding number of sub-field conductions and the unit step change. Moreover, the slopes of the mapping relationships in each sub-field conduction state can be approximated as equal. After determining the mapping relationship of one sub-field conduction state, the mapping relationships of other sub-field conduction states can be deduced.

[0072] Figure 5 is a flowchart of determining each mapping relationship based on the mapping relationship in one sub-field conduction state provided by an embodiment of the present application. As Figure 5 shown, the steps of determining each mapping relationship based on the mapping relationship in one sub-field conduction state specifically include S1201 - S1202:

[0073] S1201. According to multiple sets of actual brightness ratios and corresponding actual response data of a pixel point in any one sub-field conduction state, determine the first constant parameter of the mapping relationship in the corresponding sub-field conduction state.

[0074] S1202. Based on the first constant parameter, determine the mapping relationship in each sub-field conduction state.

[0075] Among them, the first constant parameter is the intercept and slope of the mapping relationship in the sub-field conduction state. According to two sets of actual brightness ratios and actual response data in a certain sub-field conduction state, the intercept and slope of the mapping relationship in this sub-field conduction state are determined. The slope is determined as the slope of the mapping relationships in each sub-field conduction state, and according to the intercept and the number of sub-field conductions corresponding to this sub-field conduction state, the intercepts of the mapping relationships in each sub-field conduction state are determined. In this embodiment, each LED lamp only needs to collect two sets of data, and the amount of detected data is low, but the accuracy is also low.

[0076] In another embodiment, by calculating the slope and intercept of the mapping relationship in the on state of multiple sub-fields, the average slope and the average unit step change are calculated, thereby reducing the amount of data collection while ensuring the accuracy of the calculation. Figure 6 1 is a flow chart of determining each mapping relationship based on the mapping relationships in the on-state of multiple sub-fields provided by an embodiment of the present application. Figure 6 As shown, the step of determining each mapping relationship based on the mapping relationships in the on-state of multiple sub-fields specifically includes S1203-S1204:

[0077] S1203. Determine a second constant parameter of a mapping relationship corresponding to multiple subfield conduction states according to actual brightness ratios of the pixel points in multiple subfield conduction states and corresponding actual response data; wherein at least two groups of actual brightness ratios and corresponding actual response data are obtained in one subfield conduction state.

[0078] This embodiment describes the actual response data and the corresponding actual brightness ratio obtained when the input data is equal to one, equal to the minimum division unit, equal to the product of the minimum division unit and the number of subfields, equal to the preset input threshold and equal to half of the input threshold as an example.

[0079] Exemplarily, the expression of the mapping relationship is I=k*E+b, where I is the brightness ratio, E is the response data, k is the slope, and b is the intercept. When the input data is equal to one, only one subfield conducts a grayscale decoding clock, and the first actual brightness ratio I1 and the first actual response data E1 are collected at this time; when the input data is equal to the minimum division unit, only one subfield conducts a grayscale decoding clock of the minimum division unit, and the second actual brightness ratio I2 and the second actual response data E2 are collected at this time. Substituting I1 and E1 into I=k*E+b, I1=k*E1+b is obtained, and substituting I2 and E2 into I=k*E+b is obtained. I2=k*E2+b is obtained, and I1=k*E1+b and I2=k*E2+b are combined to obtain the slope k1 and intercept b1 of the mapping relationship in the subfield conduction state with a subfield conduction number of 1.

[0080] Furthermore, when the input data is equal to the product of the minimum division unit and the number of subfields, the grayscale decoding clock of the minimum division unit of the Nth subfield is turned on, and the third actual brightness ratio I3 and the third actual response data E3 are collected. When the input data is the maximum value, the fourth actual brightness ratio I4 and the fourth actual response data E4 are collected. When the input data is half of the maximum value, the fifth actual brightness ratio I5 and the fifth actual response data E5 are collected. Substituting I3 and E3 into I=k*E+b to obtain I3=k*E3+b, substituting I4 and E4 into I=k*E+b to obtain I4=k*E4+b, substituting I5 and E5 into I=k*E+b to obtain I5=k*E5+b, any two of the three equations are combined to solve the corresponding intercepts and slopes. Calculate the average of the three intercepts and the average of the three slopes to obtain the slope k of the mapping relationship in the on-state of the subfield with N subfields turned on. N and intercept b N .

[0081] S1204: Determine the mapping relationship in the on-state of each subfield based on the average value of the plurality of second constant parameters. N The average slope is obtained by taking the average value of k1 and k2. Calculate b N The average of b / N and b1 / 1 gives the average unit step change The mapping relationship of the conduction state of the sub-field with the conduction number i is: The mapping relationship of the conduction state of a sub-field with N conduction sub-fields is: Among them, ((i-1)*n+1) / A≤E≤in / A and ((N-1)*n+1) / A≤E≤1 are the change ranges of the conduction pulse width of the corresponding mapping relationship. In this embodiment, the change range of the conduction pulse width of the sub-field conduction state can be obtained by dividing the input data range corresponding to the sub-field conduction state by the maximum input data. Exemplarily, the mapping relationship of the sub-field conduction state with the sub-field conduction number i is The mapping relationship of the conduction state of a sub-field with N conduction sub-fields is: Among them, ((i-1)*n+1) / A≤E≤in / A and ((N-1)*n+1) / A≤E≤1 are the variation ranges of the conduction pulse width corresponding to the mapping relationship. In this embodiment, the variation range of the conduction pulse width of the sub-field conduction state can be obtained by dividing the input data range corresponding to the sub-field conduction state by the maximum input data. The mapping relationships under the conduction states of each sub-field are combined, and the actual mapping relationship obtained is as follows:

[0082]

[0083] S130. Correct the calibration coefficient of the pixel according to the mapping relationship, and adjust the target parameter of the pixel according to the calibration coefficient, where the target parameter includes at least one of brightness and chrominance.

[0084] Exemplarily, when performing display screen brightness calibration, the expected brightness ratio of the pixel in each color channel can be substituted into the actual mapping relationship to obtain the expected response data corresponding to the expected brightness ratio, and based on the relationship E = M*(D / A), the brightness calibration matrix M1 is determined. The expression of the brightness calibration matrix M1 is as follows:

[0085]

[0086] Where M R1 、M G1 and M B1 correspond to the brightness attenuation ratios of the RGB color channels respectively. Therefore, the brightness calibration coefficient can be understood as the brightness attenuation ratio under each color channel. In this embodiment, the expected brightness ratio is the brightness ratio after the pixel is calibrated, and the expected response data is the conduction pulse width given by the LED constant current drive chip to the LED lamp under the action of the brightness calibration matrix M1, so that the pixel corresponding to the LED lamp emits the expected brightness value under the action of this conduction pulse width, and the ratio of the expected brightness value to the maximum brightness value is the expected brightness ratio.

[0087] In one embodiment, Figure 7 is the flowchart of correcting the brightness calibration coefficient provided by the embodiment of the present application. As Figure 7 shown, the steps of correcting the brightness calibration coefficient specifically include S1301 - S1302:

[0088] S1301. Obtain the expected brightness ratio of the pixel in each color channel, and determine the expected response data corresponding to the expected brightness ratio according to the mapping relationship.

[0089] Exemplarily, brightness calibration can be understood as reducing the brightness values of each high - brightness LED lamp to the brightness value of the lowest - brightness LED lamp. Therefore, the lowest brightness value on each color channel of the display screen can be understood as the expected brightness value after the brightness calibration of each pixel on the corresponding color channel. This embodiment is described taking the R color channel as an example. Compare the brightness values of each pixel on the display screen in the R color channel, determine the lowest brightness value of the R color channel, and use this lowest brightness value as the expected brightness value of each pixel on the R color channel. Compare the expected brightness value on the R color channel with the maximum brightness value on the R color channel to obtain the expected brightness ratio on the R color channel. The G color channel and the B color channel are the same.

[0090] In this embodiment, Figure 8It is a flowchart for determining expected response data based on a mapping relationship provided by an embodiment of the present application.

[0091] As Figure 8 shown, the steps for determining expected response data based on the mapping relationship specifically include S13011 - S13014:

[0092] S13011. Determine the response data range corresponding to the mapping relationship according to the input data range of each sub - field conduction state.

[0093] As can be seen from the above, the input data range of the sub - field conduction state with the number of sub - fields in conduction being i is (i - 1)n - 1 ≤ D ≤ i*n, and the input data range of the sub - field conduction state with the number of sub - fields in conduction being N is (N - 1)n - 1 ≤ D ≤ A. Based on the relationship E = D / A satisfied between the input data D and the conduction pulse width E, the response data range of the sub - field conduction state with the number of sub - fields in conduction being i can be determined as ((i - 1)*n + 1) / A ≤ E ≤ i*n / A, and the response data range of the sub - field conduction state with the number of sub - fields in conduction being N is ((N - 1)*n + 1) / A ≤ E ≤ 1.

[0094] S13012. Determine the brightness ratio range corresponding to the mapping relationship according to the mapping relationship and the corresponding response data range.

[0095] Exemplarily, based on the mapping relationships in each sub - field conduction state, calculate the brightness ratios of the upper threshold and the lower threshold of the corresponding response data range to obtain the brightness ratio range of the mapping relationships in each sub - field conduction state.

[0096] S13013. Compare the expected brightness ratio with the brightness ratio range to determine the target mapping relationship.

[0097] Compare the brightness ratio ranges of the mapping relationships in each sub - field conduction state with the expected brightness ratio, and determine the mapping relationship whose brightness ratio range covers the expected brightness ratio as the target mapping relationship.

[0098] Exemplarily, assume that the expected brightness ratio I G1 of the G color channel = 0.5, N = 64, the maximum input data A = 65535, and the actual mapping relationship is as follows:

[0099]

[0100] Since the expected brightness ratio is within the brightness ratio change range of I = 0.85*E + 0.15, it can be determined that I = 0.85*E + 0.15 is the target mapping relationship.

[0101] S13014. Determine the expected response data according to the target mapping relationship and the expected brightness ratio. Exemplarily, let IG1 = 0.85 * E + 0.15 to obtain the expected response data E G1 = 0.41.

[0102] S1302. According to the expected response data of each color channel, correct the correction coefficient of the pixel point in the corresponding color channel. Exemplarily, assume the input data D = 40000, and substitute the expected response data E G1 = 0.41 into the expression E = M * (40000 / 65535) to obtain the brightness correction coefficient M of the G color channel G1 = 0.67. In this embodiment, the LED constant current drive chip determines the brightness correction coefficient M in the G color channel according to the relationship E = M * (D / A) G1 = 0.67 and the conduction pulse width under D = 40000, and outputs the conduction pulse width to the LED lamp to make the expected brightness ratio I of the LED lamp in the G color channel G1 = 0.5.

[0103] Figure 9 is the second schematic diagram of the actual mapping relationship and the ideal linear relationship provided by the embodiment of the present application. As Figure 9 shown, when the expected brightness ratio I G1 = 0.5, the corresponding response data E can be obtained based on the ideal linear relationship 12 G2 = 0.5. Substitute the response data E G2 and the input data D into the relationship E = M * (D / A) to calculate the brightness correction coefficient M' G1 = 0.82. However, due to the existence of the compensation pulse width or compensation current, the response data and the brightness ratio satisfy the actual mapping relationship 11. Substitute the response data E G2 into I = 0.85 * E + 0.15, and the brightness ratio I' G1 = 0.575 can be obtained, that is, the brightness ratio of the LED lamp will reach 0.575 after being corrected by the brightness correction coefficient M' G1 , which is greater than the expected brightness ratio I G1 . Therefore, to ensure the accuracy of the brightness correction, in this embodiment, when the compensation pulse width or compensation current exists, based on the fact that the response data and the brightness ratio satisfy the actual mapping relationship 11, the expected response data E G1 = 0.41 is determined. Substitute the expected response data E G1 and the input data D into the relationship E = M * (D / A) to calculate the correction coefficient M G1 = 0.67. Under the action of the correction coefficient M G1 , the brightness ratio of the LED lamp is accurately adjusted to 0.5.

[0104] In one embodiment, it is assumed that an original brightness correction matrix M0 determined according to the existing display correction method is currently set. Substitute the original brightness correction coefficients in each color channel of the original brightness correction matrix M0 and the input data of each color channel into the relation E = M*(D / A), and use the calculated response data as the expected brightness ratio in each color channel. For example, if the original brightness correction coefficient M0 in the green channel is 0.8, D = 40000, and A = 65535, then the calculated expected brightness ratio I G1 = 0.5. Determine the brightness correction coefficient M G1 in the green channel according to the expected brightness ratio I G1 . Similarly, the brightness correction coefficient M R1 in the red channel and the brightness correction coefficient M B1 in the blue channel can be obtained. Generate a brightness correction matrix M1 through the brightness correction coefficients in the RGB channels, and replace the original brightness correction matrix M0 with the brightness correction matrix M1. At this time, the LED driver control chip outputs a corresponding conduction pulse width to the LED lamp under the action of the brightness correction matrix M1, and the LED lamp emits a uniform brightness under the action of the conduction pulse width.

[0105] It should be noted that the input data D will change according to the display content of the display screen. From the expression satisfied by the above brightness ratio, the input data D, and the maximum input data A, it can be seen that when the input data D changes, the brightness ratio displayed by the LED lamp will also change accordingly, resulting in the brightness values of the LED lamps not being unified. Therefore, each time the input data D changes, the correction coefficient can be updated accordingly according to the actual mapping relationship to ensure that the display screen always maintains a uniform brightness. The maximum input data A is determined by the LED constant current drive chip, and its value will also change according to actual needs. Similarly, when the value of the maximum input data A changes, the brightness ratio displayed by the LED lamp will also change accordingly, and the correction coefficient is also updated accordingly according to the actual mapping relationship to ensure that the display screen always maintains a uniform brightness.

[0106] In another embodiment, when performing display screen chromaticity correction, similarly substitute the expected brightness ratio of each pixel point in each color channel into the actual mapping relationship to obtain the expected response data corresponding to the expected brightness ratio, and determine the chromaticity correction matrix M2 based on the relation E = M*(D / A). The expression of the chromaticity correction matrix M2 is as follows:

[0107]

[0108] where M R2 , M G2 , and M B2 correspond to the main color brightness attenuation ratios of the RGB color channels, and M rg2 and M rb2For the red primary color, the brightness ratios of green and blue need to be compensated, M gr2 and M gb2 For the green primary color, the brightness ratios of red and blue need to be compensated, M br2 and M bg2 For the blue primary color, the brightness ratios of red and green need to be compensated. Therefore, the chromaticity correction coefficient can be understood as the attenuation ratio of the primary color brightness and the compensated brightness ratio.

[0109] In this embodiment, it is assumed that the original chromaticity correction matrix M 00 has been set according to the existing display correction method. Substitute the original chromaticity correction coefficients in the original chromaticity correction matrix M 00 and the corresponding input data into E = M*(D / A), and use the response data calculated based on each original chromaticity correction coefficient as the corresponding expected brightness ratio. Determine the current corresponding chromaticity correction coefficient according to the expected brightness ratio and the target mapping relationship, and generate the chromaticity correction matrix M2. Replace the original chromaticity correction matrix M 00 with M2. At this time, the LED drive control chip outputs the corresponding conduction pulse width to the LED lamp under the action of the chromaticity correction matrix M2, and the LED lamp emits a uniform chromaticity under the action of the conduction pulse width.

[0110] In summary, the display correction method provided by the embodiment of the present application divides the working process of the LED lamp into multiple sub-field conduction states according to the working principle of the LED lamp, and determines the mapping relationship between the response data and the brightness ratio of the LED lamp in different sub-field conduction states based on the actual response data and the actual brightness ratio of the LED lamp in different sub-field conduction states. The mapping relationship in each sub-field conduction state accurately represents the linear relationship between the response data and the brightness ratio of the LED lamp when the compensation pulse width or the compensation current exists. Based on the mapping relationship, the chromaticity correction coefficient of the LED lamp can be accurately determined when the compensation pulse width or the compensation current exists. By adjusting the response data output by the LED constant current drive chip to the LED lamp through the chromaticity correction coefficient, each LED lamp can display the same brightness and chromaticity under the action of the corresponding response data, ensuring the uniformity of the brightness and chromaticity of each LED lamp and improving the display effect of the display screen.

[0111] Compared with the method of detecting point by point and gray level by gray level, where the actual response data and the actual brightness ratio corresponding to each input data are collected to establish a one-to-one correspondence between the response data and the brightness ratio, in this application, through multiple groups of actual response data and actual brightness ratios in different sub-field conduction states, the mapping relationship in different sub-field conduction states can be accurately determined without collecting the actual response data and the actual brightness ratio point by point, greatly reducing the amount of data collected and significantly reducing the collection time.

[0112] Based on the above embodiment,Figure 10 This is a schematic structural diagram of a display correction device provided by an embodiment of the present application. Refer to Figure 10 The display correction device provided in this embodiment specifically includes: a data acquisition module 21, a mapping relationship determination module 22, and a display correction module 23.

[0113] Among them, the data acquisition module 21 is configured to acquire multiple groups of actual brightness ratios and corresponding actual response data of pixel points in at least one subfield conduction state; among them, at least two groups of actual brightness ratios and corresponding actual response data are acquired in one subfield conduction state, and the number of subfield conductions in different subfield conduction states is different;

[0114] The mapping relationship determination module 22 is configured to generate a mapping relationship between the response data and the brightness ratio of pixel points in each subfield conduction state according to multiple groups of actual brightness ratios and corresponding actual response data;

[0115] The display correction module 23 is configured to correct the correction coefficient of pixel points according to the mapping relationship, and adjust the target parameters of pixel points according to the correction coefficient, where the target parameters include at least one of brightness and chromaticity.

[0116] Based on the above embodiment, the data acquisition module 21 includes: an input data determination unit configured to determine the input data range of pixel points in each subfield conduction state according to the preset number of subfields and the preset minimum segmentation unit; a data acquisition unit configured to acquire at least two groups of actual brightness ratios and corresponding actual response data in the corresponding subfield conduction state according to the input data range.

[0117] Based on the above embodiment, the data acquisition unit includes: a data acquisition subunit configured to acquire the corresponding actual brightness ratio and actual response data when the input data is equal to one, or when the input data is equal to the minimum segmentation unit, or when the input data is equal to the product of the minimum segmentation unit and the number of subfields, or when the input data is equal to the preset input threshold.

[0118] Based on the above embodiment, the mapping relationship determination module 22 includes: a first mapping relationship determination unit configured to determine the mapping relationship in the corresponding subfield conduction state according to multiple groups of actual brightness ratios and corresponding actual response data of pixel points in each subfield conduction state.

[0119] Based on the above embodiments, the mapping relationship determination module 22 includes: a first parameter determination unit configured to determine a first constant parameter of the mapping relationship in a corresponding subfield conduction state according to multiple groups of actual brightness ratios and corresponding actual response data of a pixel point in any subfield conduction state; a second mapping relationship determination unit configured to determine the mapping relationship in each subfield conduction state based on the first constant parameter.

[0120] Based on the above embodiments, the mapping relationship determination module 22 includes: a second parameter determination unit configured to determine a second constant parameter of the mapping relationship in corresponding multiple subfield conduction states according to the actual brightness ratios and corresponding actual response data of a pixel point in multiple subfield conduction states; wherein, at least two groups of actual brightness ratios and corresponding actual response data are obtained in one subfield conduction state; a third mapping relationship determination unit configured to determine the mapping relationship in each subfield conduction state based on the average value of multiple second constant parameters.

[0121] Based on the above embodiments, the display correction module 23 includes: a desired response data determination unit configured to obtain the desired brightness ratio of a pixel point in each color channel and determine the desired response data corresponding to the desired brightness ratio according to the mapping relationship; a correction coefficient correction unit configured to correct the correction coefficient of the pixel point in the corresponding color channel according to the desired response data of each color channel.

[0122] Based on the above embodiments, the desired response data determination unit includes: a response data range determination subunit configured to determine the response data range of the corresponding mapping relationship according to the input data range of each subfield conduction state; a brightness ratio range determination subunit configured to determine the brightness ratio range corresponding to the mapping relationship according to the mapping relationship and the corresponding response data range; a target mapping relationship determination subunit configured to compare the desired brightness ratio with the brightness ratio range to determine the target mapping relationship; a desired response data determination subunit configured to determine the desired response data according to the target mapping relationship and the desired brightness ratio.

[0123] As described above, the display correction device provided in the embodiments of the present application divides the working process of the LED lamp into multiple sub-field conduction states according to the working principle of the LED lamp. Due to the influence of the compensation pulse width or compensation current, the mapping relationship of the LED lamp in different sub-field conduction states is different. Therefore, by collecting the actual response data and actual brightness ratio of the LED lamp in different sub-field conduction states, and determining the mapping relationship in each sub-field conduction state, compared with the point-by-point and gray-scale detection, the amount of data collected is greatly simplified, and the collection time is significantly reduced. By determining the mapping relationship in each sub-field conduction state according to the actual response data and actual brightness ratio of the LED lamp, the chromaticity correction coefficient of the LED lamp is accurately determined, and the response data output by the LED constant current driving chip to the LED lamp is adjusted through the chromaticity correction coefficient, so that each LED lamp displays the same brightness and chromaticity under the action of the corresponding response data, ensuring the unity of the brightness and chromaticity of each LED lamp and improving the display effect of the display screen.

[0124] The display correction device provided in the embodiments of the present application can be used to execute the display correction method provided in the above embodiments, and has the corresponding functions and beneficial effects.

[0125] Figure 11 is a schematic structural diagram of a display correction device provided in an embodiment of the present application. Refer to Figure 11 , the display correction device includes: a processor 31, a storage device 32, a communication device 33, an input device 34, and an output device 35. The number of processors 31 in the display correction device can be one or more, and the number of storage devices 32 in the display correction device can be one or more. The processor 31, storage device 32, communication device 33, input device 34, and output device 35 of the display correction device can be connected through a bus or other means.

[0126] The storage device 32, being a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the display correction method of any embodiment of the present application (for example, the data acquisition module 21, the mapping relationship determination module 22, and the display correction module 23 in the display correction device). The storage device 32 mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the device, etc. In addition, the storage device 32 can include a high-speed random access storage device, and can also include a non-volatile storage device, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some instances, the storage device can further include a storage device remotely set relative to the processor, and these remote storage devices can be connected to the device through a network. Examples of the above network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0127] The communication device 33 is used for data transmission.

[0128] The processor 31 executes various functional applications and data processing of the device by running the software programs, instructions, and modules stored in the storage device 32, that is, implements the above-mentioned display correction method.

[0129] The input device 34 can be used to receive input digital or character information, and generate key signal inputs related to the user settings and function controls of the device. The output device 35 can include display devices such as a display screen.

[0130] The above-provided display correction device can be used to execute the display correction method provided in the above embodiment, and has corresponding functions and beneficial effects.

[0131] An embodiment of the present application further provides a storage medium containing computer-executable instructions. The computer-executable instructions are used to execute a display correction method when executed by a computer processor. The display correction method includes: acquiring multiple groups of actual brightness ratios and corresponding actual response data of pixel points in at least one sub-field conduction state; wherein, at least two groups of actual brightness ratios and corresponding actual response data are acquired in one sub-field conduction state, and the number of sub-field conductions in each different sub-field conduction state is different; generating a mapping relationship between the response data and the brightness ratio of pixel points in each sub-field conduction state according to the multiple groups of actual brightness ratios and corresponding actual response data; correcting the correction coefficient of pixel points according to the mapping relationship, and adjusting the target parameters of pixel points according to the correction coefficient, and the target parameters include at least one of brightness and chromaticity.

[0132] Storage medium - Any of various types of storage device apparatuses or storage devices. The term "storage medium" is intended to include: installation media such as CD-ROMs, floppy disks or magnetic tape devices; computer system storage devices or random access storage devices such as DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM, etc.; non-volatile storage devices such as flash memory, magnetic media (such as hard disks or optical storage); registers or other similar types of storage device elements, etc. The storage medium may also include other types of storage devices or combinations thereof. Additionally, the storage medium may be located in a first computer system in which the program is executed, or may be located in a different second computer system that is connected to the first computer system via a network (such as the Internet). The second computer system may provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media residing in different locations (such as in different computer systems connected via a network). The storage medium may store program instructions executable by one or more processors (e.g., specifically implemented as a computer program).

[0133] Of course, for a storage medium provided in an embodiment of the present application that contains computer-executable instructions, the computer-executable instructions are not limited to the above display correction method, and can also perform related operations in the display correction methods provided in any embodiment of the present application.

[0134] A computer program product provided in another embodiment of the present application includes computer instructions that, when the computer instructions run on a display correction device, cause the display correction device to execute the display correction method described in the above embodiments.

[0135] The display correction device, storage medium, and display correction device provided in the above embodiments can execute the display correction methods provided in any embodiment of the present application. For technical details not described in detail in the above embodiments, reference can be made to the display correction methods provided in any embodiment of the present application.

[0136] The above is only the preferred embodiment of the present application and the technical principles applied. The present application is not limited to the specific embodiments here. Various obvious changes, re-adjustments, and substitutions that can be made by those skilled in the art will not depart from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments. Without departing from the concept of the present application, it may also include more other equivalent embodiments, and the scope of the present application is determined by the scope of the claims.

Claims

1. A display correction method, characterized in that, Including: Obtaining multiple groups of actual brightness ratios and corresponding actual response data of a pixel point in at least one sub-field conduction state; wherein, at least two groups of actual brightness ratios and corresponding actual response data are obtained in one sub-field conduction state, and the number of sub-fields conducted in each different sub-field conduction state is different; Generating a mapping relationship between the response data and the brightness ratio of the pixel point in each sub-field conduction state according to the multiple groups of the actual brightness ratios and the corresponding actual response data; Correcting the correction coefficient of the pixel point according to the mapping relationship, and adjusting the target parameter of the pixel point according to the correction coefficient, where the target parameter includes at least one of brightness and chromaticity.

2. The display correction method according to claim 1, wherein The obtaining of multiple groups of actual brightness ratios and corresponding actual response data of a pixel point in at least one sub-field conduction state includes: Determining the input data range of the pixel point in each sub-field conduction state according to a preset number of sub-fields and a preset minimum segmentation unit; Obtaining at least two groups of actual brightness ratios and corresponding actual response data in the corresponding sub-field conduction state according to the input data range.

3. The display correction method according to claim 2, wherein The obtaining of multiple groups of actual brightness ratios and corresponding actual response data in the corresponding sub-field conduction state according to the input data range includes: When the input data is equal to one, or when the input data is equal to the minimum segmentation unit, or when the input data is equal to the product of the minimum segmentation unit and the number of sub-fields, or when the input data is equal to a preset input threshold, obtaining the corresponding actual brightness ratio and actual response data.

4. The display correction method according to claim 1, wherein The generating of the mapping relationship between the response data and the brightness ratio of the pixel point in each sub-field conduction state according to the multiple groups of the actual brightness ratios and the corresponding actual response data includes: Determining the mapping relationship in the corresponding sub-field conduction state according to the multiple groups of actual brightness ratios and corresponding actual response data of the pixel point in each sub-field conduction state.

5. The display correction method according to claim 1, wherein The generating of the mapping relationship between the response data and the brightness ratio of the pixel point in each sub-field conduction state according to the multiple groups of the actual brightness ratios and the corresponding actual response data includes: Determining the first constant parameter of the mapping relationship in the corresponding sub-field conduction state according to the multiple groups of actual brightness ratios and corresponding actual response data of the pixel point in any one sub-field conduction state; Determining the mapping relationship in each sub-field conduction state based on the first constant parameter.

6. The display correction method according to claim 1, wherein, The generating of the mapping relationship between the response data and the brightness ratio of the pixel point in each sub-field conduction state according to the multiple groups of the actual brightness ratios and the corresponding actual response data includes: Determining the second constant parameter of the mapping relationship in the corresponding multiple sub-field conduction states according to the actual brightness ratios and corresponding actual response data of the pixel point in multiple sub-field conduction states; wherein, at least two groups of actual brightness ratios and corresponding actual response data are obtained in one sub-field conduction state; Determining the mapping relationship in each sub-field conduction state based on the average value of the multiple second constant parameters.

7. The display correction method according to claim 1, wherein The correcting the correction coefficient of the pixel point according to the mapping relationship includes: Obtaining the expected luminance ratio of the pixel point in each color channel, and determining the expected response data corresponding to the expected luminance ratio according to the mapping relationship; Correcting the correction coefficient of the pixel point in the corresponding color channel according to the expected response data of each color channel.

8. The display correction method according to claim 7, wherein The determining the expected response data corresponding to the expected luminance ratio according to the mapping relationship includes: Determining the response data range corresponding to the mapping relationship according to the input data range of each subfield conduction state; Determining the luminance ratio range corresponding to the mapping relationship according to the mapping relationship and the corresponding response data range; Comparing the expected luminance ratio with the luminance ratio range to determine the target mapping relationship; Determining the expected response data according to the target mapping relationship and the expected luminance ratio.

9. A display correction device, characterized in that, including: A data acquisition module configured to acquire multiple sets of actual luminance ratios and corresponding actual response data of a pixel point in at least one subfield conduction state; wherein, at least two sets of actual luminance ratios and corresponding actual response data are acquired in one subfield conduction state, and the number of subfield conductions in different subfield conduction states is different; A mapping relationship determination module configured to generate a mapping relationship between the response data and the luminance ratio of the pixel point in each subfield conduction state according to the multiple sets of actual luminance ratios and corresponding actual response data; A display correction module configured to correct the correction coefficient of the pixel point according to the mapping relationship, and adjust the target parameters of the pixel point according to the correction coefficient, where the target parameters include at least one of luminance and chromaticity.

10. A display correction device, characterized in that, including: One or more processors, a storage device; The storage device stores one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the display correction method according to any one of claims 1-8.

11. A storage medium containing computer-executable instructions, characterized in that, The computer-executable instructions are used to execute the display correction method according to any one of claims 1-8 when executed by a computer processor.

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