Compensation value determination method and device, brightness compensation method and device and display equipment

Abstract

The invention provides a compensation value determination method and device, a brightness compensation method and device, and a display device, and the method comprises the steps: determining a plurality of measurement data sets, each measurement data set comprises a power voltage value and a gray-scale value; for each measurement data group, controlling a target display panel to display based on the measurement data group to obtain a measurement brightness value, and determining a data voltage compensation value corresponding to the measurement data group based on a size relationship between the measurement brightness value and a target brightness value; based on the data voltage compensation values corresponding to the multiple measurement data sets, a data voltage compensation relation table is established, and the data voltage compensation relation table represents the corresponding relation among the multiple power supply voltage values, the multiple gray-scale values and the multiple data voltage compensation values. When the data voltage compensation relation table is used for compensating the data voltage value of the target display panel, the operation process can be simplified, and the compensation efficiency and the compensation precision can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a method and device for determining a data voltage compensation value, a method and device for compensating brightness of a display panel, and a display device. Background Art

[0002] Active-matrix Organic Light-Emitting Diode (AMOLED) has become the mainstream display device today due to its bright colors, low power consumption and foldable state.

[0003] However, due to various factors, the brightness of the AMOLED module in actual application is different from the debugged value during production debugging. The existing compensation method mainly compensates for the voltage drop (IR drop) of the power supply voltage (ELVDD), but the compensation effect is still not ideal. Summary of the invention

[0004] In order to solve the above problems, the embodiments of the present application provide a method and device for determining a data voltage compensation value, a method and device for compensating brightness of a display panel, and a display device.

[0005] The first aspect of the present application provides a method for determining a data voltage compensation value, including: determining multiple measurement data groups, each measurement data group including a power supply voltage value and a grayscale value; for each measurement data group, controlling a target display panel to display based on the measurement data group to obtain a measured brightness value, and determining a data voltage compensation value corresponding to the measurement data group based on the magnitude relationship between the measured brightness value and the target brightness value; and establishing a data voltage compensation relationship table based on the data voltage compensation values ​​corresponding to each of the multiple measurement data groups. The data voltage compensation relationship table characterizes the correspondence between multiple power supply voltage values, multiple grayscale values, and multiple data voltage compensation values.

[0006] In combination with the first aspect, based on the size relationship between the measured brightness value and the target brightness value, determining the data voltage compensation value corresponding to the measurement data group includes: when the measured brightness value is inconsistent with the target brightness value, adjusting the data voltage value of the target display panel at least once, and determining the size relationship between the measured brightness value and the target brightness value after adjusting the data voltage value, until the measured brightness value after adjusting the data voltage value is consistent with the target brightness value, and determining the adjustment amount of the data voltage value when they are consistent as the data voltage compensation value corresponding to the measurement data group.

[0007] In combination with the first aspect, based on the magnitude relationship between the measured brightness value and the target brightness value, determining the data voltage compensation value corresponding to the measurement data group includes: when the measured brightness value is consistent with the target brightness value, determining the data voltage compensation value corresponding to the measurement data group to be zero.

[0008] A second aspect of the present application provides a brightness compensation method for a display panel, comprising: obtaining a current power supply voltage value and a current grayscale value of a target display panel; obtaining a predetermined data voltage compensation relationship table, the data voltage compensation relationship table representing a correspondence between multiple power supply voltage values, multiple grayscale values, and multiple data voltage compensation values; based on the current power supply voltage value and the current grayscale value of the target display panel, querying the data voltage compensation relationship table to obtain a first data voltage compensation value; updating a first data voltage value of the target display panel based on the first data voltage compensation value to obtain a second data voltage value; and controlling the target display panel to display based on the second data voltage value to compensate for the brightness of the target display panel.

[0009] In combination with the second aspect, based on the current power supply voltage value and the current grayscale value of the target display panel, the data voltage compensation relationship table is queried to obtain the first data voltage compensation value, including: based on the current power supply voltage value and the current grayscale value of the target display panel, the data voltage compensation relationship table is queried to determine whether the data voltage compensation relationship table includes the current power supply voltage value and the current grayscale value; in the case where the data voltage compensation relationship table includes the current power supply voltage value and the current grayscale value, the data voltage compensation value corresponding to the current power supply voltage value and the current grayscale value in the data voltage compensation relationship table is determined as the first data voltage compensation value; in the case where the data voltage compensation relationship table does not include the current power supply voltage value and / or the current grayscale value, the first data voltage compensation value is determined based on the data voltage compensation value corresponding to the power supply voltage value and / or the grayscale value adjacent to the current power supply voltage value and / or the current grayscale value.

[0010] In combination with the second aspect, when the data voltage compensation relationship table does not include the current power supply voltage value and / or the current grayscale value, determining the first data voltage compensation value based on the data voltage compensation value corresponding to the power supply voltage value and / or the grayscale value closest to the current power supply voltage value and / or the current grayscale value includes: when the data voltage compensation relationship table does not include the current power supply voltage value but includes the current grayscale value, among multiple power supply voltage values ​​corresponding to the current grayscale value in the data voltage compensation relationship table, performing proportional calculation based on the data voltage compensation value corresponding to the power supply voltage value closest to the current power supply voltage value to obtain the first data voltage compensation value; and / or, In a case where the data voltage compensation relationship table does not include the current grayscale value but includes the current power supply voltage value, a first data voltage compensation value is obtained by performing proportional calculations based on the data voltage compensation value corresponding to the grayscale value closest to the current grayscale value, among the multiple grayscale values ​​corresponding to the current power supply voltage value in the data voltage compensation relationship table; and / or, in a case where the data voltage compensation relationship table does not include the current power supply voltage value and the current grayscale value, a first data voltage compensation value is obtained by performing proportional calculations based on the power supply voltage value closest to the current power supply voltage value and the data voltage compensation value corresponding to the grayscale value closest to the current grayscale value in the data voltage compensation relationship table.

[0011] In conjunction with the second aspect, the data voltage compensation relationship table is determined using the above method.

[0012] The third aspect of the present application provides a device for determining a data voltage compensation value, comprising: a first determination module, a second determination module and an establishment module. The first determination module is used to determine a plurality of measurement data groups, each measurement data group comprising a power supply voltage value and a grayscale value. The second determination module is used to control a target display panel to display based on the measurement data group for each measurement data group, obtain a measured brightness value, and determine a data voltage compensation value corresponding to the measurement data group based on the magnitude relationship between the measured brightness value and the target brightness value. The establishment module is used to establish a data voltage compensation relationship table based on the data voltage compensation values ​​corresponding to each of the plurality of measurement data groups. The data voltage compensation relationship table characterizes the correspondence between a plurality of power supply voltage values, a plurality of grayscale values ​​and a plurality of data voltage compensation values.

[0013] In a fourth aspect of the present application, a brightness compensation device for a display panel is provided, comprising: a first acquisition module, a second acquisition module, a query module, an update module, and a display module. The first acquisition module is used to acquire the current power supply voltage value and the current grayscale value of the target display panel. The second acquisition module is used to acquire a predetermined data voltage compensation relationship table. The data voltage compensation relationship table represents the correspondence between multiple power supply voltage values, multiple grayscale values, and multiple data voltage compensation values. The query module is used to query the data voltage compensation relationship table based on the current power supply voltage value and the current grayscale value of the target display panel to obtain a first data voltage compensation value. The update module is used to update the first data voltage value of the target display panel based on the first data voltage compensation value to obtain a second data voltage value. The display module is used to control the target display panel to display based on the second data voltage value to compensate for the brightness of the target display panel.

[0014] A fifth aspect of the present application provides a display device, including a memory, a processor, and a computer program stored in the memory and executed by the processor, and the above method is implemented when the processor executes the computer program.

[0015] A sixth aspect of the present application provides a machine-readable storage medium on which a computer program is stored, and the computer program implements the above method when executed by a processor.

[0016] Through the above technical solution, multiple measurement data groups are determined, and the data voltage compensation value corresponding to each measurement data group is determined based on the power supply voltage value and grayscale value in each measurement data group, and a data voltage compensation relationship table is established. The data voltage compensation relationship table represents the correspondence between multiple power supply voltage values, multiple grayscale values, and multiple data voltage compensation values. When the data voltage compensation relationship table in the present application is used to compensate the data voltage value of the target display panel, it can simplify the calculation process and improve the compensation efficiency and compensation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 4 is a flow chart of a method for determining a data voltage compensation value provided by an exemplary embodiment of the present application.

[0018] Figure 2 It is a flowchart of a method for determining a data voltage compensation value corresponding to a measurement data group provided by an exemplary embodiment of the present application.

[0019] Figure 3 It is a flow chart of a brightness compensation method for a display panel provided by an exemplary embodiment of the present application.

[0020] Figure 4 4 is a flow chart of a method for determining a first data voltage compensation value provided by an exemplary embodiment of the present application.

[0021] Figure 5 4 is a structural block diagram of a device for determining a data voltage compensation value provided by an exemplary embodiment of the present application.

[0022] Figure 6 It is a structural block diagram of a brightness compensation device for a display panel provided by an exemplary embodiment of the present application.

[0023] Figure 7 Shown is a schematic structural diagram of a display device provided by an exemplary embodiment of the present application.

[0024] Figure 8 It is a structural schematic diagram of a display device provided in yet another embodiment of the present application.

[0025] Fig. 9 is an exemplary curve showing how brightness value varies with DBV. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] The brightness of the AMOLED module is proportional to the current, and the current calculation formula is I = k (ELVDD-Vdata) 2 , where I represents the current value, k represents the panel characteristic coefficient, ELVDD represents the positive power supply voltage, and Vdata represents the data voltage. It can be seen that the brightness of the AMOLED module is related to the power supply voltage ELVDD, the data voltage Vdata and the panel characteristic coefficient k.

[0028] The ELVDD of the current AMOLED module is usually set to a fixed value (for example, 4.6V). The module supplier debugs at this voltage to obtain the target brightness (or debugging value). However, on the mobile phone side, due to various factors, the ELVDD output by the mobile phone motherboard deviates from the fixed value, resulting in the brightness of the AMOLED module on the mobile phone side being inconsistent with the debugging value (or target brightness), resulting in brightness offset.

[0029] The existing compensation scheme is to introduce ELVDD drop compensation, specifically: connect the external input ELVDD to the display driver integrated circuit (DDIC), DDIC detects the actual value of ELVDD, and determines the difference between the actual value of ELVDD and the fixed value, and obtains the new data voltage Vdata according to the difference. Since the data voltage Vdata is compensated, it can be seen that the difference between ELVDD and Vdata remains unchanged. When the panel characteristic coefficient k remains unchanged, the brightness remains unchanged when ELVDD changes. However, in actual applications, changes in ELVDD will also cause changes in the panel characteristic coefficient k. In this case, the actual brightness value will still be inconsistent with the debug value (or target brightness value).

[0030] In addition, the brightness of the AMOLED module can be adjusted by the display brightness value (DBV). Fig. 9 is an exemplary curve showing the change of brightness value with DBV. Fig. 9 As shown in the figure, a brightness jump occurs at point A. This is because the negative power supply voltage (ELVSS) here is changed by adjusting the saturation region of the driving MOS tube under different brightness conditions. The change of ELVSS will cause the brightness to change. In addition, the change of ELVSS will also cause the panel characteristic coefficient k to change. Therefore, only considering the compensation of ELVSS change cannot eliminate the brightness jump.

[0031] In view of the above problems, the present application provides a method and device for determining a data voltage compensation value, a method and device for compensating a brightness of a display panel, and a display device, which take into account the impact of changes in panel characteristic coefficients on the actual display brightness, so that the actual brightness value after compensation is closer to the target brightness value, and can avoid brightness jumps when adjusting the brightness through DBV.

[0032] In a first aspect, an embodiment of the present application provides a method for determining a data voltage compensation value.

[0033] Figure 1 FIG. 1 is a flow chart of a method for determining a data voltage compensation value provided by an exemplary embodiment of the present application. Figure 1 As shown, the method includes the following steps.

[0034] Step S110, determining a plurality of measurement data sets, each of which includes a power supply voltage value and a grayscale value.

[0035] Due to changes in application scenarios, the power supply voltage value during actual application is different from the fixed value set at the factory, and may be larger or smaller. Therefore, it is necessary to determine the data voltage compensation values ​​corresponding to multiple different power supply voltage values. Multiple power supply voltage values ​​are determined according to the fixed values ​​set at the factory. For example, if the fixed value is 4.6V, multiple power supply voltage values ​​may be 4.4V, 4.5V, 4.6V, 4.7V, 4.8V, etc. For another example, if the fixed value is 4.7V, multiple power supply voltage values ​​may be 4.6V, 4.65V, 4.7V, 4.75V, 4.8V, etc. In an embodiment of the present application, the difference between multiple adjacent power supply voltage values ​​is determined according to actual conditions, and may be the same or different, and the embodiment of the present application is not limited.

[0036] Grayscale values ​​can represent the brightness information in grayscale images. The grayscale value ranges from 0 to 255. Different grayscale values ​​correspond to different brightness values. Therefore, when performing brightness compensation, it is necessary to consider the brightness values ​​under different grayscale values. In the embodiment of the present application, the grayscale value can be determined according to the actual situation, and the embodiment of the present application does not limit it. For example, multiple grayscale values ​​can be 32, 64, 128, 192, and 255.

[0037] Therefore, a plurality of supply voltage values ​​and a plurality of grayscale values ​​may determine a plurality of measurement data sets.

[0038] Step S120 , for each measurement data group, controlling the target display panel to display based on the measurement data group to obtain a measured brightness value, and determining a data voltage compensation value corresponding to the measurement data group based on a magnitude relationship between the measured brightness value and the target brightness value.

[0039] Optionally, the data voltage compensation value is a positive value or a non-positive value.

[0040] In the embodiment of the present application, a measurement data group is used as an example for explanation. The measurement data group includes a power supply voltage value and a grayscale value. The target display panel is controlled to display according to the power supply voltage value and the grayscale value, and an optical device (for example, a photometer or a brightness meter) is used to measure the actual brightness of the target display panel to obtain a measured brightness value. After obtaining the measured brightness value, the target brightness value corresponding to the power supply voltage value and the grayscale value is obtained. The measured brightness value and the target brightness value are compared to determine the data voltage compensation value corresponding to the measurement data group.

[0041] Optionally, when the measured brightness value is consistent with the target brightness value, the data voltage compensation value corresponding to the measurement data set is determined to be zero. Optionally, when the measured brightness value is inconsistent with the target brightness value, the data voltage value of the target display panel is adjusted at least once, and the magnitude relationship between the measured brightness value after the adjustment of the data voltage value and the target brightness value is determined, until the measured brightness value after the adjustment of the data voltage value is consistent with the target brightness value, and the adjustment amount of the data voltage value when consistent is determined as the data voltage compensation value corresponding to the measurement data set. For more description on determining the data voltage compensation value, see Figure 2 .

[0042] Step S130 , establishing a data voltage compensation relationship table based on the data voltage compensation values ​​corresponding to the plurality of measurement data groups.

[0043] The data voltage compensation relationship table represents the correspondence between multiple power supply voltage values, multiple grayscale values, and multiple data voltage compensation values. The data voltage compensation relationship table can be stored in a memory. The data voltage compensation relationship table can be used to compensate the data voltage value of the target display panel, thereby achieving brightness compensation for the target display panel.

[0044] Exemplarily, Table 1 shows a data voltage compensation relationship table. As shown in Table 1, any power supply voltage value and any grayscale value correspond to a data voltage compensation value. At the same grayscale value, different power supply voltage values ​​correspond to different data voltage compensation values. For example, when the grayscale value is 255, the data voltage compensation values ​​corresponding to 4.4V, 4.5V, 4.6V, 4.7V and 4.8V are a1, a2, a3, a4 and a5, respectively. At the same power supply voltage, different grayscale values ​​correspond to different data voltage compensation values. For example, when the power supply voltage is 4.4V, the data voltage compensation values ​​corresponding to 255, 192, 128, 64 and 32 are a1, b1, c1, d1 and e1, respectively.

[0045] Table 1 Data voltage compensation relationship table

[0046]

[0047] In an embodiment of the present application, a plurality of measurement data groups are determined, and the data voltage compensation value corresponding to the measurement data group is determined based on the power supply voltage value and the grayscale value in each measurement data group, and a data voltage compensation relationship table is established. The data voltage compensation relationship table characterizes the correspondence between a plurality of power supply voltage values, a plurality of grayscale values, and a plurality of data voltage compensation values. The data voltage compensation relationship table in the embodiment of the present application can be used to compensate the data voltage value of the target display panel, thereby realizing the brightness compensation of the target display panel, simplifying the calculation process, and improving the compensation efficiency. In addition, in an embodiment of the present application, the data voltage compensation value is determined according to the measured brightness value and the target brightness value, and a plurality of factors affecting the brightness value are taken into account, such as the power supply voltage, the panel characteristic coefficient, etc., so that the actual brightness value after compensation is closer to the target brightness value, and the compensation accuracy is improved. In addition, by compensating the data voltage value through the data voltage compensation relationship table, the brightness jump when the brightness is adjusted by DBV can also be avoided.

[0048] Figure 2 It is a flowchart of a method for determining a data voltage compensation value corresponding to a measurement data group provided by an exemplary embodiment of the present application. Figure 2 Only one measurement data set is used as an example for explanation. Those skilled in the art can understand that the data voltage compensation values ​​of multiple measurement data sets can be obtained by Figure 2 The method shown is used to determine the Figure 2 As shown, the method includes the following steps.

[0049] Step S210 , for a measurement data set, controlling a target display panel to display based on the measurement data set to obtain a measured brightness value.

[0050] The measurement data set includes a power supply voltage value and a grayscale value. The target display panel is controlled to display according to the power supply voltage value and the grayscale value, and an optical device (eg, a photometer or a luminance meter) is used to measure the actual brightness of the target display panel to obtain a measured brightness value.

[0051] Step S220, determining whether the measured brightness value is consistent with the target brightness value.

[0052] After obtaining the measured brightness value, the target brightness value corresponding to the power supply voltage value and the grayscale value is obtained. It is determined whether the measured brightness value is consistent with the target brightness value. If the measured brightness value is consistent with the target brightness value, step S230 is executed to determine the data voltage compensation value corresponding to the measurement data group to be zero.

[0053] If the measured brightness value is inconsistent with the target brightness value, step S240 is executed to adjust the data voltage value of the target display panel. For the fixed power supply voltage value, the panel characteristic coefficient k is a fixed value. According to the current calculation formula, it can be known that the brightness value (or current) of the target display panel mainly depends on the data voltage value. The data voltage value is adjusted, and a new measured brightness value is obtained according to the adjusted data voltage value. Then step S250 is executed.

[0054] Step S250, determine whether the measured brightness value after adjusting the data voltage value is consistent with the target brightness value. If the measured brightness value after adjusting the data voltage value is inconsistent with the target brightness value, return to step S240, that is, adjust the data voltage value of the target display panel again. Then execute the judgment step S250 again.

[0055] If the measured brightness value after adjusting the data voltage value is consistent with the target brightness value, step S260 is executed to determine the adjustment amount of the data voltage value as the data voltage compensation value corresponding to the measurement data group.

[0056] In an embodiment of the present application, for a measurement data group, a data voltage compensation value of the measurement data group is determined based on the measured brightness value of the target display panel and the target brightness value. The data reliability is high. When used for brightness compensation, the compensated brightness is closer to the target brightness, thereby improving the brightness compensation accuracy.

[0057] In a second aspect, an embodiment of the present application provides a brightness compensation method for a display panel.

[0058] Figure 3 FIG. 1 is a flow chart of a brightness compensation method for a display panel provided by an exemplary embodiment of the present application. Figure 3 As shown, the method includes the following steps.

[0059] Step S310, obtaining a current power supply voltage value and a current grayscale value of a target display panel.

[0060] The current power supply voltage value refers to the power supply voltage provided by the driving circuit of the target display panel, which can be a positive power supply voltage (EVLDD) or a negative power supply voltage (ELVSS). The grayscale value can represent the brightness information in the image. The current grayscale value corresponds to the target brightness value of the target display panel.

[0061] Step S320, obtaining a predetermined data voltage compensation relationship table.

[0062] The data voltage compensation relationship table represents the correspondence between multiple power supply voltage values, multiple grayscale values, and multiple data voltage compensation values. The data voltage compensation relationship table can be determined according to the method for determining the data voltage compensation value in the embodiment of the present application. After determining the data voltage compensation relationship table, the data voltage compensation relationship table can be stored in a memory. The data voltage compensation relationship table is obtained in the memory.

[0063] Step S330 , based on the current power supply voltage value and the current grayscale value of the target display panel, query the data voltage compensation relationship table to obtain a first data voltage compensation value.

[0064] Optionally, based on the current power supply voltage value and the current grayscale value of the target display panel, the data voltage compensation relationship table is queried to determine whether the current power supply voltage value and the current grayscale value are included in the data voltage compensation relationship table. In the case where the current power supply voltage value and the current grayscale value are included in the data voltage compensation relationship table, the data voltage compensation value corresponding to the current power supply voltage value and the current grayscale value in the data voltage compensation relationship table is determined as the first data voltage compensation value. In the case where the current power supply voltage value and / or the current grayscale value are not included in the data voltage compensation relationship table, the first data voltage compensation value is determined based on the data voltage compensation value corresponding to the power supply voltage value and / or the grayscale value adjacent to the current power supply voltage value and / or the current grayscale value. For more description on determining the first data voltage compensation value, see Figure 4 , I will not go into details here.

[0065] Step S340 , updating the first data voltage value of the target display panel based on the first data voltage compensation value to obtain a second data voltage value.

[0066] After obtaining the first data voltage compensation value, the first data voltage value of the target display panel is updated according to the first data voltage compensation value. Exemplarily, the first data voltage value is added to the first data voltage compensation value to obtain the second data voltage value. It can be understood that the first data voltage compensation value can be a positive value or a negative value. When the first data voltage compensation value is a positive value, the second data voltage value is greater than the first data voltage value. When the first data voltage compensation value is a negative value, the second data voltage value is less than the first data voltage value.

[0067] Step S350 , controlling the target display panel to display based on the second data voltage value to compensate for the brightness of the target display panel.

[0068] The target display panel is controlled to display according to the current power supply voltage value, the current gray value and the second data voltage value. Since the second data voltage value is a compensated data voltage value, brightness compensation of the target display panel can be achieved.

[0069] In the embodiment of the present application, the data voltage is compensated according to the data voltage compensation relationship table, and the target display panel is controlled to display based on the compensated data voltage (second data voltage), thereby realizing brightness compensation of the target display panel. Since the data voltage compensation relationship table is determined according to the measured brightness value and the target brightness value, it can be ensured that the compensated brightness is close to the target brightness, and the brightness value is more accurate. In addition, by compensating the data voltage value through the data voltage compensation relationship table, the brightness jump when adjusting the brightness through DBV can also be avoided.

[0070] Figure 4 FIG. 1 is a flow chart of a method for determining a first data voltage compensation value provided by an exemplary embodiment of the present application. Figure 4 As shown, the method includes the following steps.

[0071] Step S410 , querying a data voltage compensation relationship table based on a current power supply voltage value and a current grayscale value of a target display panel.

[0072] The data voltage compensation relationship table represents the correspondence between multiple power supply voltage values, multiple grayscale values ​​and multiple data voltage compensation values. After obtaining the current power supply voltage value and the current grayscale value, the data voltage compensation relationship table is searched for the current power supply voltage value and the current grayscale value.

[0073] Step S420, determine whether the data voltage compensation relationship table includes the current power supply voltage value and the current grayscale value. If the data voltage compensation relationship table includes the current power supply voltage value and the current grayscale value (if yes), execute step S430, and determine the data voltage compensation value corresponding to the current power supply voltage value and the current grayscale value in the data voltage compensation relationship table as the first data voltage compensation value. Exemplarily, the current power supply voltage value is 4.5V, and the current grayscale value is 192. As shown in Table 1, the data voltage compensation relationship table includes the current power supply voltage value and the current grayscale value, and the data voltage compensation value b2 is determined as the first data voltage compensation value. For another example, the current power supply voltage value is 4.6V, and the current grayscale value is 64. As shown in Table 1, the data voltage compensation relationship table includes the current power supply voltage value and the current grayscale value, and the data voltage compensation value d3 is determined as the first data voltage compensation value.

[0074] If the data voltage compensation relationship table does not include the current power supply voltage value and the current grayscale value (if not), execute step S440 to determine whether the data voltage compensation relationship table does not include the current power supply voltage value but includes the current grayscale value. If the result that the data voltage compensation relationship table does not include the current power supply voltage value but includes the current grayscale value is yes, execute step S450, and perform proportional calculation based on the data voltage compensation value corresponding to the power supply voltage value closest to the current power supply voltage value among the multiple power supply voltage values ​​corresponding to the current grayscale value in the data voltage compensation relationship table to obtain the first data voltage compensation value. Exemplarily, the current power supply voltage value is 4.55V and the current grayscale value is 128V. As shown in Table 1, the data voltage compensation relationship table includes the current grayscale value but does not include the current power supply voltage value. It is determined that the power supply voltage values ​​closest to the current power supply voltage value are 4.5V and 4.6V, and the corresponding data voltage compensation values ​​are c2 and c3, respectively. Set the first data voltage compensation value to x, then the formula for proportional calculation is The first data voltage compensation value For another example, the current power supply voltage value is 4.62V and the current grayscale value is 255. As shown in Table 1, the data voltage compensation relationship table includes the current grayscale value but does not include the current power supply voltage value. The power supply voltage values ​​closest to the current power supply voltage value are determined to be 4.6V and 4.7V, and the corresponding data voltage compensation values ​​are a3 and a4 respectively. The first data voltage compensation value is set to x, and the formula for proportional calculation is: The first data voltage compensation value In some embodiments, the data voltage compensation value obtained by proportional calculation and the corresponding power supply voltage value and grayscale value are stored in a data voltage compensation relationship table to avoid repeated calculations in subsequent applications and reduce calculation load.

[0075] If the result that the data voltage compensation relationship table does not include the current power supply voltage value but includes the current grayscale value is no, execute step S460 to determine whether the data voltage compensation relationship table does not include the current grayscale value but includes the current power supply voltage value. If the result that the data voltage compensation relationship table does not include the current grayscale value but includes the current power supply voltage value is yes, execute step S470 to perform proportional calculation based on the data voltage compensation value corresponding to the grayscale value closest to the current grayscale value among the multiple grayscale values ​​corresponding to the current power supply voltage value in the data voltage compensation relationship table to obtain the first data voltage compensation value. Exemplarily, the current power supply voltage value is 4.8V and the current grayscale value is 96. As shown in Table 1, the data voltage compensation relationship table includes the current power supply voltage value but does not include the current grayscale value. It is determined that the grayscale values ​​closest to the current grayscale value are 128 and 64, respectively, and the corresponding data voltage compensation values ​​are c5 and d5, respectively. The first data voltage compensation value is set to x, and the formula for proportional calculation is: The first data voltage compensation value For another example, the current power supply voltage value is 4.6V, and the current grayscale value is 144. As shown in Table 1, the data voltage compensation relationship table includes the current power supply voltage value, but does not include the current grayscale value. It is determined that the grayscale values ​​closest to the current grayscale value are 192 and 128, respectively, and the corresponding data voltage compensation values ​​are b3 and c3, respectively. The first data voltage compensation value is set to x, and the formula for proportional calculation is: The first data voltage compensation value In some embodiments, the data voltage compensation value obtained by proportional calculation and the corresponding power supply voltage value and grayscale value are stored in a data voltage compensation relationship table to avoid repeated calculations in subsequent applications and reduce calculation load.

[0076] If the result of including the current power supply voltage value in the data voltage compensation relationship table is no, execute step S480, and perform proportional calculation based on the power supply voltage value closest to the current power supply voltage value in the data voltage compensation relationship table and the data voltage compensation value corresponding to the grayscale value closest to the current grayscale value to obtain the first data voltage compensation value. Exemplarily, the current power supply voltage value is 4.55V and the current grayscale value is 96. As shown in Table 1, the data voltage compensation relationship table includes neither the current power supply voltage value nor the current grayscale value. It is determined that the power supply voltage values ​​closest to the current power supply voltage value are 4.5V and 4.6V, and it is determined that the grayscale values ​​closest to the current grayscale value are 128 and 64 respectively. When the grayscale value is 128, the data voltage compensation values ​​corresponding to the power supply voltage values ​​4.5V and 4.6V are c2 and c3 respectively. Then when the grayscale value is 128 and the power supply voltage value is 4.55V, the corresponding data voltage compensation value is When the grayscale value is 64, the data voltage compensation values ​​corresponding to the power supply voltage values ​​of 4.5V and 4.6V are d2 and d3 respectively. Then when the grayscale value is 64 and the power supply voltage value is 4.55V, the corresponding data voltage compensation value is Therefore, the first data voltage compensation value is set to x, and when the grayscale value is 96, the proportional calculation formula is: The first data voltage compensation value In some embodiments, the data voltage compensation value obtained by proportional calculation and the corresponding power supply voltage value and grayscale value are stored in a data voltage compensation relationship table to avoid repeated calculations in subsequent applications and reduce calculation load.

[0077] In the embodiment of the present application, when the current power supply voltage value and the current gray value exist in the data voltage compensation relationship table, the data voltage compensation value corresponding to the current power supply voltage value and the current gray value is used as the first data voltage compensation value. When the current power supply voltage value and the current gray value are not included in the data voltage compensation relationship table, the first data voltage compensation value is determined by an equal-proportional interpolation algorithm, which is simple and easy to operate and has high accuracy.

[0078] In a third aspect, an embodiment of the present application provides a device for determining a data voltage compensation value.

[0079] Figure 5 FIG. 1 is a structural block diagram of a device for determining a data voltage compensation value provided by an exemplary embodiment of the present application. Figure 5 As shown, the data voltage compensation value determination device 500 includes a first determination module 510 , a second determination module 520 and an establishment module 530 .

[0080] The first determination module 510 is used to determine a plurality of measurement data groups, each of which includes a power supply voltage value and a grayscale value.

[0081] The second determination module 520 is used to control the target display panel to display based on the measurement data group for each measurement data group, obtain a measured brightness value, and determine a data voltage compensation value corresponding to the measurement data group based on the magnitude relationship between the measured brightness value and the target brightness value.

[0082] The establishment module 530 is used to establish a data power supply compensation relationship table based on the data voltage compensation values ​​corresponding to the multiple measurement data groups. The data voltage compensation relationship table represents the correspondence between multiple power supply voltage values, multiple grayscale values ​​and multiple data voltage compensation values.

[0083] Optionally, the second determination module 520 is further configured to, when the measured brightness value is consistent with the target brightness value, determine the data voltage compensation value corresponding to the measurement data group to be zero.

[0084] Optionally, the second determination module 520 is also used to adjust the data voltage value of the target display panel at least once when the measured brightness value is inconsistent with the target brightness value, and determine the relationship between the measured brightness value after the adjustment of the data voltage value and the target brightness value, until the measured brightness value after the adjustment of the data voltage value is consistent with the target brightness value, and determine the adjustment amount of the data voltage value when they are consistent as the data voltage compensation value corresponding to the measurement data group.

[0085] The specific working principle and benefits of the data voltage compensation value determination device provided in the embodiment of the present application are similar to the specific working principle and benefits of the data voltage compensation value determination method provided in the embodiment of the present application, and will not be repeated here.

[0086] In a fourth aspect, an embodiment of the present application provides a brightness compensation device for a display panel.

[0087] Figure 6 FIG. 1 is a block diagram of a brightness compensation device for a display panel provided by an exemplary embodiment of the present application. Figure 6 As shown, the brightness compensation device 600 of the display panel includes a first acquisition module 610 , a second acquisition module 620 , a query module 630 , an update module 640 and a display module 650 .

[0088] The first acquisition module 610 is used to acquire a current power supply voltage value and a current grayscale value of a target display panel.

[0089] The second acquisition module 620 is used to acquire a predetermined data voltage compensation relationship table. The data voltage compensation relationship table represents the corresponding relationship between a plurality of power supply voltage values, a plurality of grayscale values, and a plurality of data voltage compensation values.

[0090] The query module 630 is used to query the data voltage compensation relationship table based on the current power supply voltage value and the current grayscale value of the target display panel to obtain the first data power supply compensation value.

[0091] The updating module 640 is used to update the first data voltage value of the target display panel based on the first data voltage compensation value to obtain a second data voltage value.

[0092] The display module 650 is used to control the target display panel to display based on the second data voltage value, so as to compensate for the brightness of the target display panel.

[0093] Optionally, the query module 630 is further configured to query the data voltage compensation relationship table based on the current power supply voltage value and the current grayscale value of the target display panel to determine whether the data voltage compensation relationship table includes the current power supply voltage value and the current grayscale value. The query module 630 is further configured to determine the first data voltage compensation value based on the data voltage compensation values ​​corresponding to the power supply voltage value and / or the grayscale value adjacent to the current power supply voltage value and / or the current grayscale value when the data voltage compensation relationship table does not include the current power supply voltage value and / or the current grayscale value.

[0094] Optionally, the query module 630 is further used to, when the data voltage compensation relationship table does not include the current power supply voltage value but includes the current grayscale value, perform proportional calculation based on the data voltage compensation value corresponding to the power supply voltage value closest to the current power supply voltage value among the multiple power supply voltage values ​​corresponding to the current grayscale value in the data voltage compensation relationship table to obtain the first data voltage compensation value. The query module 630 is further used to, when the data voltage compensation relationship table does not include the current grayscale value but includes the current power supply voltage value, perform proportional calculation based on the data voltage compensation value corresponding to the grayscale value closest to the current grayscale value among the multiple grayscale values ​​corresponding to the current power supply voltage value in the data voltage compensation relationship table to obtain the first data voltage compensation value. The query module 630 is further used to, when the data voltage compensation relationship table does not include the current power supply voltage value and the current grayscale value, perform proportional calculation based on the power supply voltage value closest to the current power supply voltage value and the data voltage compensation value corresponding to the grayscale value closest to the current grayscale value in the data voltage compensation relationship table to obtain the first data voltage compensation value.

[0095] Optionally, the query module 630 is further configured to determine the data voltage compensation value corresponding to the current power supply voltage value and the current grayscale value in the data voltage compensation relationship table as the first data voltage compensation value when the data voltage compensation relationship table includes the current power supply voltage value and the current grayscale value.

[0096] The specific working principle and benefits of the brightness compensation device of the display panel provided in the embodiment of the present application are similar to the specific working principle and benefits of the brightness compensation method of the display panel provided in the embodiment of the present application, and will not be repeated here.

[0097] In a fifth aspect, an embodiment of the present application provides a display device.

[0098] Below, reference Figure 7 To describe a display device according to an embodiment of the present application. Figure 7 Shown is a schematic structural diagram of a display device provided by an exemplary embodiment of the present application.

[0099] like Figure 7 As shown, the display device 700 includes one or more processors 701 and a memory 702 .

[0100] The processor 701 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the display device 700 to perform desired functions.

[0101] The memory 702 may include one or more computer program products, and the computer program product may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, a random access memory (RAM) and / or a cache memory (cache), etc. The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 701 may run the program instructions to implement the data voltage compensation value determination method or the display panel brightness compensation method of the various embodiments of the present application described above and / or other desired functions. Various contents such as data voltage compensation values, data voltage compensation relationship tables, etc. may also be stored in the computer-readable storage medium.

[0102] In one example, the display device 700 may further include: an input device 703 and an output device 704 , and these components are interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0103] The input device 703 may include, for example, a keyboard, a mouse, etc.

[0104] The output device 704 can output various information to the outside, including the first data voltage compensation value, the second data voltage value, etc. The output device 704 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and the like.

[0105] Of course, to simplify, Figure 7 Only some of the components related to the present application in the display device 700 are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, according to specific application conditions, the display device 700 may also include any other appropriate components.

[0106] Figure 8 is a schematic diagram of the structure of a display device provided by another embodiment of the present application. Figure 8 As shown, the display device 800 is a product with an image display function. For example, the display device 800 can be used to display static images, such as pictures or photos. The display device 800 can also be used to display dynamic images, such as videos.

[0107] The display device 800 may be a laptop computer, a mobile phone, a handheld or portable computer, a camera, a camcorder, a vehicle-mounted smart central control screen, a calculator, a smart watch, a GPS navigator, an electronic photo, an electronic billboard or sign, a projector, etc.

[0108] The display device 800 includes a display panel provided by any of the above embodiments, and the display panel is an active matrix organic light emitting diode display panel.

[0109] In addition, the display device 800 may also have functions such as taking photos, recording videos, fingerprint recognition, and face recognition. Accordingly, the display device 800 also includes at least one functional module for implementing the above functions, such as an under-screen camera, an under-screen fingerprint recognition sensor, and the like.

[0110] In addition to the above-mentioned methods and devices, an embodiment of the present application may also be a computer program product, which includes computer program instructions, which, when executed by a processor, enable the processor to execute the steps of the method for determining the data voltage compensation value or the method for brightness compensation of the display panel according to various embodiments of the present application described above in this specification.

[0111] The computer program product may be written in any combination of one or more programming languages ​​to write program codes for performing the operations of the embodiments of the present application, including object-oriented programming languages, such as Java, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as an independent software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0112] In addition, an embodiment of the present application may also be a computer-readable storage medium on which computer program instructions are stored. When the computer program instructions are executed by a processor, the processor executes the steps in the method for determining the data voltage compensation value or the method for brightness compensation of the display panel according to various embodiments of the present application described above in this specification.

[0113] The computer readable storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0114] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0115] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0116] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0117] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0118] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A method for determining a data voltage compensation value, characterized in that: include: Determining a plurality of measurement data groups, each of the measurement data groups comprising a power supply voltage value and a grayscale value; For each of the measurement data groups, controlling the target display panel to display based on the measurement data group to obtain a measured brightness value, and determining a data voltage compensation value corresponding to the measurement data group based on a magnitude relationship between the measured brightness value and a target brightness value; Based on the data voltage compensation values ​​corresponding to the plurality of measurement data groups, a data voltage compensation relationship table is established, wherein the data voltage compensation relationship table represents the correspondence between a plurality of power supply voltage values, a plurality of grayscale values, and a plurality of data voltage compensation values.

2. The method for determining the data voltage compensation value according to claim 1, characterized in that: The determining, based on the magnitude relationship between the measured brightness value and the target brightness value, the data voltage compensation value corresponding to the measurement data group comprises: In the case where the measured brightness value is inconsistent with the target brightness value, the data voltage value of the target display panel is adjusted at least once, and the magnitude relationship between the measured brightness value after adjusting the data voltage value and the target brightness value is determined, until the measured brightness value after adjusting the data voltage value is consistent with the target brightness value, and the adjustment amount of the data voltage value when they are consistent is determined as the data voltage compensation value corresponding to the measurement data group.

3. The method for determining a data voltage compensation value according to claim 1, wherein: The determining, based on the magnitude relationship between the measured brightness value and the target brightness value, the data voltage compensation value corresponding to the measurement data group comprises: When the measured brightness value is consistent with the target brightness value, the data voltage compensation value corresponding to the measurement data group is determined to be zero.

4. A brightness compensation method for a display panel, characterized in that: include: Obtain the current power supply voltage value and current grayscale value of the target display panel; Acquire a predetermined data voltage compensation relationship table, wherein the data voltage compensation relationship table represents a correspondence between a plurality of power supply voltage values, a plurality of grayscale values, and a plurality of data voltage compensation values; Based on the current power supply voltage value and the current grayscale value of the target display panel, query the data voltage compensation relationship table to obtain a first data voltage compensation value; updating a first data voltage value of the target display panel based on the first data voltage compensation value to obtain a second data voltage value; The target display panel is controlled to perform display based on the second data voltage value, so as to compensate for the brightness of the target display panel.

5. The brightness compensation method of a display panel according to claim 4, characterized in that: The step of querying the data voltage compensation relationship table based on the current power supply voltage value and the current grayscale value of the target display panel to obtain the first data voltage compensation value includes: Based on the current power supply voltage value and the current grayscale value of the target display panel, query the data voltage compensation relationship table to determine whether the data voltage compensation relationship table includes the current power supply voltage value and the current grayscale value; In a case where the data voltage compensation relationship table includes the current power supply voltage value and the current grayscale value, determining the data voltage compensation value corresponding to the current power supply voltage value and the current grayscale value in the data voltage compensation relationship table as the first data voltage compensation value; When the current power supply voltage value and / or the current grayscale value are not included in the data voltage compensation relationship table, the first data voltage compensation value is determined based on the data voltage compensation values ​​corresponding to the power supply voltage values ​​and / or grayscale values ​​adjacent to the current power supply voltage value and / or the current grayscale value.

6. The brightness compensation method of a display panel according to claim 5, characterized in that: In a case where the current power supply voltage value and / or the current grayscale value are not included in the data voltage compensation relationship table, determining the first data voltage compensation value based on a data voltage compensation value corresponding to a power supply voltage value and / or a grayscale value closest to the current power supply voltage value and / or the current grayscale value comprises: In a case where the data voltage compensation relationship table does not include the current power supply voltage value but includes the current grayscale value, the first data voltage compensation value is obtained by performing proportional calculation based on the data voltage compensation value corresponding to the power supply voltage value closest to the current power supply voltage value among multiple power supply voltage values ​​corresponding to the current grayscale value in the data voltage compensation relationship table; and / or In the case where the data voltage compensation relationship table does not include the current grayscale value but includes the current power supply voltage value, the first data voltage compensation value is obtained by performing proportional calculation based on the data voltage compensation value corresponding to the grayscale value closest to the current grayscale value among the multiple grayscale values ​​corresponding to the current power supply voltage value in the data voltage compensation relationship table; and / or When the current power supply voltage value and the current grayscale value are not included in the data voltage compensation relationship table, the first data voltage compensation value is obtained by performing proportional calculation based on the power supply voltage value closest to the current power supply voltage value and the data voltage compensation value corresponding to the grayscale value closest to the current grayscale value in the data voltage compensation relationship table.

7. The brightness compensation method of a display panel according to claim 4, characterized in that: The data voltage compensation relationship table is determined by using any one of the methods in claims 1-3.

8. A device for determining a data voltage compensation value, characterized in that: include: A first determination module, used for determining a plurality of measurement data groups, each of which comprises a power supply voltage value and a grayscale value; A second determination module is used to control the target display panel to display based on the measurement data group for each measurement data group, obtain a measured brightness value, and determine a data voltage compensation value corresponding to the measurement data group based on a magnitude relationship between the measured brightness value and a target brightness value; The establishing module is used to establish a data voltage compensation relationship table based on the data voltage compensation values ​​corresponding to the multiple measurement data groups, wherein the data voltage compensation relationship table represents the corresponding relationship between multiple power supply voltage values, multiple grayscale values ​​and multiple data voltage compensation values.

9. A brightness compensation device for a display panel, characterized in that: include: A first acquisition module, used for acquiring a current power supply voltage value and a current grayscale value of a target display panel; A second acquisition module is used to acquire a predetermined data voltage compensation relationship table, wherein the data voltage compensation relationship table represents a correspondence between a plurality of power supply voltage values, a plurality of grayscale values, and a plurality of data voltage compensation values; A query module, configured to query the data voltage compensation relationship table based on the current power supply voltage value and the current grayscale value of the target display panel to obtain a first data voltage compensation value; an updating module, configured to update the first data voltage value of the target display panel based on the first data voltage compensation value to obtain the second data voltage value; The display module is used to control the target display panel to display based on the second data voltage value, so as to compensate for the brightness of the target display panel.

10. A display device, comprising a memory, a processor, and a computer program stored in the memory and executed by the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

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