Display driving method, display device, and computer readable storage medium

Abstract

The application discloses a display driving method, a display device and a computer readable storage medium. The driving method comprises the following steps: determining whether a first frame rate of a current frame and a second frame rate of a next frame are the same; in response to the first frame rate being different from the second frame rate, generating a first voltage and inputting the first voltage to a target voltage input end of a target pixel circuit in a preset stage of the next frame; in response to the first frame rate being the same as the second frame rate, generating a second voltage and inputting the second voltage to the target voltage input end of the target pixel circuit in the preset stage of the next frame; and the first voltage is different from the second voltage. The design of the application can improve the phenomenon of brightness jump of a display panel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display driving method, a display device and a computer readable storage medium. BACKGROUND

[0002] OLED (Organic Light Emitting Diode) display devices are considered to be the emerging application technology of the next generation of flat panel displays because of their excellent characteristics such as self-emission, no need for a backlight source, high contrast, thin thickness, wide viewing angle, fast response speed, use in flexible panels, wide temperature range, simple structure and process, etc.

[0003] With the continuous development of display technology, high refresh rate display screens have emerged, but the high refresh rate display screen technology is still not mature and has flickering problems. SUMMARY

[0004] The present application provides a display driving method, a display device and a computer readable storage medium, which can improve the phenomenon of cutting frequency brightness jump of the display panel.

[0005] The first aspect of the present application provides a display driving method, the driving method comprising: generating a first voltage when a first frame rate and a second frame rate are different, and inputting the first voltage to a target voltage input end of a target pixel circuit in a preset phase of the next frame, wherein the first frame rate is the frame rate of the current frame, and the second frame rate is the frame rate of the next frame; generating a second voltage when the first frame rate and the second frame rate are the same, and inputting the second voltage to the target voltage input end of the target pixel circuit in the preset phase of the next frame; wherein the first voltage and the second voltage are different.

[0006] In an embodiment, the preset phase includes an active phase, and the target voltage input end includes a gray scale voltage input end, or the preset phase includes a blanking phase, and the target voltage input end includes a reset voltage input end.

[0007] In an embodiment, the preset stage comprises an effective stage, the target voltage input end comprises a gray scale voltage input end, the generating the first voltage when the first frame rate is different from the second frame rate and the generating the second voltage when the first frame rate is equal to the second frame rate comprise: generating the first voltage according to a first gamma voltage table; and generating the second voltage according to a second gamma voltage table; wherein the first gamma voltage table comprises gray scale voltage values of a plurality of bind point gray scales at at least one luminance level, the second gamma voltage table comprises gray scale voltage values of the plurality of bind point gray scales at the at least one luminance level, and the plurality of bind point gray scales comprise a target gray scale, and the gray scale voltage value of the target gray scale in the first gamma voltage table is different from the gray scale voltage value of the target gray scale in the second gamma voltage table at the same luminance level.

[0008] Preferably, the target gray scale is lower than a first gray scale threshold.

[0009] Preferably, the driving transistor in the target pixel circuit is a P-type transistor.

[0010] Preferably, the gray scale voltage value of the target gray scale in the first gamma voltage table is greater than the gray scale voltage value of the target gray scale in the second gamma voltage table at the same luminance level.

[0011] In an embodiment, the first gamma voltage table and the second gamma voltage table are pre-stored in a driving chip; or the second gamma voltage table is pre-stored in a driving chip, and the driving chip further stores a coefficient table comprising coefficients of the plurality of bind point gray scales at the at least one luminance level, and before the generating the first voltage according to the first gamma voltage table, the method further comprises: for each bind point gray scale, multiplying the gray scale voltage value of the bind point gray scale in the second gamma voltage table at the luminance level and the coefficient of the bind point gray scale in the coefficient table at the luminance level to obtain the gray scale voltage value of the bind point gray scale in the first gamma voltage table at the luminance level.

[0012] In an embodiment, the preset stage comprises a blanking stage, the target voltage input end comprises a reset voltage input end, the reset voltage input end is electrically connected with a light emitting element, and the first voltage is less than the second voltage.

[0013] In an embodiment, when the first frame rate is different from the second frame rate, the first voltage is generated, and the first voltage is input to the target voltage input end of the target pixel circuit in the preset stage of the next frame. The step includes: when the brightness level of the next frame is one of the preset brightness levels, the first voltage is input to the reset voltage input end of the target pixel circuit in the preset stage of the next frame; and when the brightness level of the next frame is not any one of the preset brightness levels, the second voltage is input to the reset voltage input end of the target pixel circuit in the preset stage of the next frame.

[0014] In an embodiment, when the first frame rate is different from the second frame rate, the first voltage is generated, and the first voltage is input to the target voltage input end of the target pixel circuit in the preset stage of the next frame. The step includes: when the second frame rate is less than the first frame rate, the first voltage is generated, and the first voltage is input to the target voltage input end in the preset stage of the next frame; and when the second frame rate is greater than the first frame rate, the second voltage is input to the target voltage input end in the preset stage of the next frame.

[0015] In an embodiment, before the step of generating the first voltage when the first frame rate is different from the second frame rate, the step further includes: when the first frame rate exceeds the frame rate threshold, the step of generating the first voltage when the first frame rate is different from the second frame rate is performed; and when the first frame rate does not exceed the frame rate threshold, the second voltage is input to the target voltage input end in the preset stage of the next frame.

[0016] The second aspect of the present application provides a display device, the display device comprising a processor, a memory and a communication circuit, the processor is coupled to the memory and the communication circuit respectively, the memory stores program data, and the processor implements the steps in the driving method of any one of the above embodiments by executing the program data in the memory.

[0017] The third aspect of the present application provides a computer readable storage medium, the computer readable storage medium stores a computer program, and the computer program can be executed by a processor to implement the steps in the driving method of any one of the above embodiments.

[0018] Compared with the prior art, the application has the beneficial effects that: the method of the application only adjusts the voltage (i.e. the first voltage) of the first frame after frequency cutting, and if the second frame, the third frame, and the like after frequency cutting are all the same as the frame rate of the first frame, the second voltage is used, i.e. the second voltage is maintained all the time, that is, the application only optimizes the brightness of the first frame after frequency cutting, and the second voltage is still used all the time for the same frequency display, so that the problem of brightness jump of frequency cutting is solved for the display panel, and the transition of display brightness is more smooth. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor.

[0020] Figure 1 is a flowchart of the driving method of the display panel of the application;

[0021] Figure 2 is a schematic diagram of an embodiment of the pixel circuit of the display panel of the application;

[0022] Figure 3 is Figure 2 the timing diagram corresponding to the pixel circuit in the embodiment;

[0023] Figure 4 is a schematic diagram of an embodiment of the input voltage of the target voltage input end in the case of high frequency cutting low frequency of the application;

[0024] Figure 5 is a schematic diagram of an embodiment of the input voltage of the target voltage input end in the case of low frequency cutting high frequency of the application;

[0025] Figure 6 is Figure 1 a flowchart of an embodiment of step S100 in the embodiment;

[0026] Figure 7 is Figure 1 a flowchart of another embodiment of step S100 in the embodiment;

[0027] Figure 8 is Figure 1 a flowchart of an embodiment before step S100 in the embodiment;

[0028] Figure 9 is a structural schematic diagram of an embodiment of the display device of the application;

[0029] Figure 10FIG. 1 is a structural schematic diagram of an embodiment of a computer readable storage medium of the present application. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0031] It should be noted that the terms "first" and "second" in the present application are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0032] The inventors have found that, in the process of frequency switching, the coupling of voltages between different frequencies to the pixel circuit in the display panel is different, which causes the brightness difference in frequency switching. The inventors have provided the following method.

[0033] Referring to Figure 1 The present application provides a display driving method, the driving method comprising:

[0034] S100: generating a first voltage when the first frame rate is different from the second frame rate, and inputting the first voltage to a target voltage input end of a target pixel circuit in a preset stage of the next frame, wherein the first frame rate is the frame rate of the current frame, and the second frame rate is the frame rate of the next frame.

[0035] Specifically, the display panel displays a display picture continuously by frame by frame, in general, high frame rate display can make the transition of the picture more smooth, low frame rate display can reduce display power consumption, therefore, in different application scenarios, different frame rates can be selected for display. The first frame rate of the current frame refers to the frame rate of the picture being currently displayed, the second frame rate of the next frame refers to the frame rate of the frame after the current frame, that is, in the current state, the next frame has not output the picture. The first frame rate and the second frame rate include at least one of 1Hz, 10Hz, 30Hz, 60Hz, 90Hz, 120Hz or 144Hz. This step is to judge whether the first frame rate and the second frame rate are the same, that is, two results will be finally output, one is that the first frame rate and the second frame rate are different, and the other is that the first frame rate and the second frame rate are the same. When the first frame rate and the second frame rate are different, that is, the display panel is about to perform frequency switching display, more specifically, in the case that the first frame rate is greater than the second frame rate, or the first frame rate is less than the second frame rate, a first voltage is generated, the first voltage is a voltage provided for the display picture of the next frame, and the first voltage is used to reduce the brightness mutation that will occur in the next frame.

[0036] S200: when the first frame rate and the second frame rate are the same, a second voltage is generated, and the second voltage is input to the target voltage input end of the target pixel circuit in a preset stage of the next frame; wherein the first voltage and the second voltage are different.

[0037] Specifically, when the first frame rate and the second frame rate are the same, that is, the display panel is about to perform the same frequency display, a second voltage is generated, the second voltage is a voltage provided for the display picture of the next frame, and the second voltage is different from the first voltage, the second voltage is a voltage for the same frequency display, that is, the frame rate of the next frame is always the same, and the second voltage is also always the same.

[0038] From the above method, it can be seen that the method of the present application only adjusts the voltage (that is, the first voltage) for the first frame after frequency switching, and if the second frame, the third frame, and the like after frequency switching are the same as the frame rate of the first frame, the second voltage is used, that is, the second voltage is always maintained. That is, the present application only optimizes the brightness of the first frame after frequency switching, and the second voltage is always used for the same frequency display, therefore, for the display panel, the problem of brightness jump after frequency switching is solved, and the transition of the display brightness is more smooth.

[0039] In order to more clearly illustrate the present application, an embodiment of a pixel circuit is provided, referring to Figure 2 , Figure 2 An embodiment of a pixel circuit. In this embodiment, an 8T1C circuit is included, of course, the driving method of the present application can also be applied to other pixel circuits, and is not limited to Figure 2 the schematic diagram in the description. Figure 2The pixel circuit comprises a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, a seventh transistor T7 and an eighth transistor T8, the first transistor T1 is a driving transistor, and the other transistors are switch transistors, wherein the third transistor T3 and the fourth transistor T4 are N-type metal oxide transistors, and the other transistors are P-type polysilicon transistors, and the third transistor T3 and the fourth transistor T4 are designed as metal oxide transistors, which can improve the problem of current leakage of the first transistor T1 in the pixel circuit, better maintain the voltage of the storage capacitor Cst, and thus better display a low frame rate picture. The first reset voltage Vref1 is used for resetting the gate of the first transistor T1 and the storage capacitor Cst, the second reset voltage Vref2 is used for resetting the anode of the light emitting element OLED, the third reset voltage Vref3 is used for resetting the gate of the first transistor T1 and the storage capacitor Cst, and the data voltage Vdata is used for providing the data voltage to the gate of the first transistor T1. In addition Figure 2 The pixel circuit further comprises a first power signal ELVDD and a second power signal ELVSS, a first switch signal S1, a second switch signal S2, a third switch signal S3, a fourth switch signal S4 and a light emitting control signal EM. The pixel circuit can be used as an embodiment of the target pixel circuit of the present application.

[0040] Further, please refer to Figure 3 , Figure 3 is a timing diagram of the pixel circuit corresponding to Figure 2 . In the first stage t1, the third switch signal S3 controls the third transistor T3 to be turned on, the fourth switch signal S4 controls the seventh transistor T7 and the eighth transistor T8 to be turned on, the second reset voltage Vref2 is input to the anode of the light emitting element OLED for resetting the anode, and the third reset voltage Vref3 is input to the gate of the first transistor T1 and one end of the storage capacitor Cst for resetting the gate of the first transistor T1 and the storage capacitor Cst; in the second stage t2, the first switch signal S1 controls the fourth transistor T4 to be turned on, the third switch signal S3 controls the third transistor T3 to be turned on, and the first reset voltage Vref1 is input to the gate of the first transistor T1 and one end of the storage capacitor Cst for further resetting the gate of the first transistor T1 and the storage capacitor Cst; in the third stage t3, the second switch signal S2 controls the second transistor T2 to be turned on, the third switch signal S3 controls the third transistor T3 to be turned on, and the data voltage Vata is input to the gate of the first transistor T1 and one end of the storage capacitor Cst for storing the data voltage Vdata in the gate of the first transistor T1 and the storage capacitor Cst; in the fourth stage t4, the light emitting control signal EM controls the fifth transistor T5 and the sixth transistor T6 to be turned on, and the light emitting element OLED is turned on to emit light.

[0041] In the target pixel circuit, the actual display brightness of the light emitting element OLED is affected by the size of the data voltage Vdata and the reset of the light emitting element OLED electrode, etc. Therefore, the adjusted voltage after the frequency switching is input, i.e., the generated first voltage is different from the generated second voltage, so that the brightness jump of the first frame after the frequency switching disappears.

[0042] In an embodiment, the preset stage includes an active stage Active, and the target voltage input end includes a gray scale voltage input end.

[0043] Specifically, the active stage Active refers to a stage in which the data voltage Vdata can be input to the gate of the first transistor T1. In the active stage Active, the gate of the first transistor T1 is refreshed by the data voltage Vdata, and the gray scale voltage input end is the gate of the first transistor T1. Further, the size of the data voltage Vdata affects the actual light emitting brightness of the light emitting element OLED, and at this time, the first voltage and the second voltage are both the data voltage Vdata. The second voltage is input in the same frequency display, and the first voltage is input in the first frame after the frequency switching. By using the first voltage different from the second voltage, the brightness jump phenomenon can be improved.

[0044] In an embodiment, the preset stage includes an active stage, the target voltage input end includes a gray scale voltage input end, and the step of generating the first voltage in the step S100 and the step of generating the second voltage in the step S200 include:

[0045] According to the first gamma voltage table, the first voltage is generated; and according to the second gamma voltage table, the second voltage is generated. The first gamma voltage table includes gray scale voltage values of a plurality of binding point gray scales at at least one brightness level, and the second gamma voltage table includes gray scale voltage values of the plurality of binding point gray scales at at least one brightness level. The plurality of binding point gray scales include a target gray scale. At the same brightness level, the corresponding gray scale voltage value of the target gray scale in the first gamma voltage table is not equal to the corresponding gray scale voltage value of the target gray scale in the second gamma voltage table.

[0046] Tables 1 and 2 can be combined.

[0047] Table 1: First gamma voltage table at one brightness level

[0048] L0 L1 L3 L7 L15 L23 L31 ...... L255 R a 11 ]]> a 12 ]]> a 13 ]] a 14 ]] a 15 ]]> a 16 ]]> a 17 ]]> ...... a 1n ]]> G a 21 ]]> a 22 ]]> a 23 ]]> a 24 ]]> a 25 ]]> a 26 ]]> a 27 ]]> ...... a 2n ]]> B a 31 ]]> a 32 ]] a 33 ]]> a 34 ]]> a 35 ]]> a 36 ]]> a 37 ]]> ...... a 3n ]]>

[0049] Table 2: Second gamma voltage table corresponding to the first gamma table at the same brightness level

[0050] L0 L1 L3 L7 L15 L23 L31 ...... L255 R b 11 ]]> b 12 ]]> b 13 ]]> b 14 ]]> b 15 ]]> b 16 ]]> b 17 ]]> ...... b 1n ]]> G b 21 ]]> b 22 ]]> b 23 ]]> b 24 ]]> b 25 ]]> b 26 ]]> b 27 ]]> ...... b 2n ]]> B b 31 ]]> b 32 ]]> b 33 ]]> b 34 ]]> b 35 ]]> b 36 ]]> b 37 ]]> ...... b 3n ]]>

[0051] Specifically, in an embodiment, Table 1 and Table 2 show the corresponding gray scale voltage values of RGB under different binding point gray scales, i.e. the above-mentioned data voltage Vdata, of course, in some other embodiments, the above-mentioned Table 1 and Table 2 can also be the register values corresponding to the corresponding gray scale voltage values of RGB under different binding point gray scales (the register values and the gray scale voltage values have a one-to-one mapping relationship), no matter which of the above two embodiments, ultimately converted into data voltage Vdata provided to the target pixel circuit, in the actual call Table 1, there are corresponding binding point gray scale in Table 1 can be directly called as the first voltage, there is no corresponding binding point gray scale can be calculated by interpolation method corresponding to the gray scale voltage in turn as the first voltage, the second voltage obtained by Table 2 is similar to Table 1, this application will not be repeated. In addition to the above-mentioned Table 1 and Table 2 under the same brightness level, the first gamma voltage table and the second gamma voltage table include a plurality of gray scale voltage values of different brightness levels, for example, a plurality of different brightness levels can be Nor1, Nor2, Nor3, Nor4, Nor5, Nor6, Nor7, Nor8 and Nor9, etc. The target brightness of Nor1 to Nor9 decreases in turn, each brightness level corresponds to a first gamma voltage table and a second gamma voltage table, so the gray scale voltage values of the same binding point gray scale in the first gamma voltage table under different brightness levels can be different.

[0052] Further, the target gray scale refers to part of the plurality of binding point gray scales, or all of the plurality of binding point gray scales, under the same brightness level, the gray scale voltage values of the first gamma voltage table and the second gamma voltage table corresponding to the target gray scale are different, of course, the first voltage and the second voltage generated by interpolation method between the target gray scale are also different. The gray scale voltage value corresponding to the target gray scale is used to improve the phenomenon of frequency brightness jump.

[0053] In an application scenario, the plurality of binding point gray scales include L0, L1, L3, L7, L15, L23, L31, L47, L63, L79, L111, L143, L207, L239 and L255, a total of 15 binding point gray scales. Each binding point gray scale corresponds to three gray scale voltage values of RGB, and each brightness level corresponds to three gray scale voltage values corresponding to the above-mentioned plurality of binding point gray scales.

[0054] In an embodiment, the target gray scale is lower than the first gray scale threshold. When the gray scale is higher, the brightness is generally higher, and in the case of higher brightness, even if the frequency cutting causes a brightness jump, the human eye is less sensitive to the brightness jump. In contrast, when the gray scale is lower, the brightness is generally lower, and in the case of lower brightness, the phenomenon of frequency cutting causing a brightness jump is easily identified by the human eye. Therefore, the target gray scale can be lower than the first gray scale threshold, and only the low-brightness range sensitive to the human eye is optimized for the frequency cutting brightness jump. The first gray scale threshold can be set by collecting the brightness change at the time of frequency cutting by the brightness collection device, and the first gray scale threshold is a gray scale greater than the maximum gray scale in the target gray scale. In specific settings, it can be one gray scale greater or several gray scales greater, and the specific setting is not limited.

[0055] Further, the target gray scale at different brightness levels can be different, and thus the first gray scale threshold at different brightness levels can also be different.

[0056] Of course, in some other embodiments, the target gray scale can also be all gray scales, and the frequency cutting brightness jump can be optimized for all gray scales.

[0057] In an embodiment, referring to Figure 2 , the drive transistor in the target pixel circuit is a P-type transistor. Of course, in some other embodiments, the drive transistor in the target pixel circuit can also be an N-type transistor.

[0058] In an embodiment, at the same brightness level, the gray scale voltage value of the target gray scale in the first gamma voltage table is greater than the gray scale voltage value of the target gray scale in the second gamma voltage table.

[0059] Specifically, the P-type transistor is low-voltage conduction, and the greater the voltage, the smaller the current flowing through the drive transistor, and the lower the brightness of the light-emitting element OLED. Thus, at the same brightness level, the gray scale voltage value of the target gray scale in the first gamma table is greater than the gray scale voltage value of the target gray scale in the second gamma voltage table, which can improve the frequency cutting brightness jump.

[0060] Of course, in some other embodiments, the drive transistor in the target pixel circuit is an N-type transistor, and at the same brightness level, the gray scale voltage value of the target gray scale in the first gamma voltage table is less than the gray scale voltage value of the target gray scale in the second gamma voltage table. The difference lies in that the N-type transistor is high-voltage conduction, and the greater the voltage, the higher the display brightness of the light-emitting element OLED.

[0061] In an embodiment, the first gamma voltage table and the second gamma voltage table are pre-stored in the driving chip. After judging whether the first frame rate and the second frame rate are the same, the corresponding first gamma voltage table or the second gamma voltage table can be directly called from the driving chip.

[0062] In another embodiment, the second gamma voltage table is pre-stored in the driving chip, and the driving chip also stores a coefficient table including coefficients of each of the bind point gray scales at at least one luminance level. The step before generating the first voltage in step S100 further includes: for each bind point gray scale, multiplying the gray scale voltage value of the bind point gray scale in the second gamma voltage table at the same luminance level by the coefficient of the bind point gray scale at the luminance level in the coefficient table to obtain the gray scale voltage value of the bind point gray scale at the luminance level in the first gamma voltage table.

[0063] Specifically, the tables 1, 2 and 3 can be further combined.

[0064] Table 3 is the corresponding coefficient table at the same luminance level as in tables 1 and 2

[0065] L0 L1 L3 L7 L15 L23 L31 ...... L255 R k 11 ]]> k 12 ]]> k 13 ]]> k 14 ]]> k 15 ]]> k 16 ]]> k 17 ]]> ...... k 1n ]]> G k 21 ]]> k 22 ]]> k 23 ]]> k 24 ]]> k 25 ]]> k 26 ]]> k 27 ]]> ...... k 2n ]]> B k 31 ]]> k 32 ]]> k 33 ]]> k 34 ]]> k 35 ]]> k 36 ]]> k 37 ]]> ...... k 3n ]]>

[0066] wherein a ij = k ij x b ij , i and j are integers, i ranges from 1 to 3, j ranges from 1 to n, and n is the number of bind point gray scales. Thus, at the same luminance level, the gray scale voltage value of the bind point gray scale in the second gamma voltage table is multiplied by the coefficient of the bind point gray scale in the coefficient table to obtain the gray scale voltage value of the bind point gray scale in the first gamma voltage table. Of course, at other luminance levels, the gray scale voltage value of the bind point gray scale in the first gamma voltage table is also obtained in the above manner. Thus, in actual application, as long as the second gamma voltage table and the coefficient table are stored in the driving chip, the corresponding parameters in the second gamma voltage table and the coefficient table are multiplied when generating the first voltage, and the second gamma voltage table is called when generating the second voltage.

[0067] In an embodiment, when table 2 is the register value corresponding to the gray scale voltage value of RGB at different bind point gray scales, table 1 is calculated by table 3. At this time, the product obtained by multiplying the gray scale voltage value of the bind point gray scale in table 2 by the coefficient of the bind point gray scale in table 3 is rounded.

[0068] Of course, in some other embodiments, the register values corresponding to the first gamma voltage table and the register values corresponding to the second gamma voltage table can also be stored in the driving chip. The register values can be converted into gray scale voltages, so that when the first voltage or the second voltage needs to be generated, the register values can be used to generate the voltage.

[0069] In an embodiment, the preset stage comprises a blanking stage Porch, and the target voltage input end comprises a reset voltage input end.

[0070] Specifically, the blanking stage Porch refers to that the voltage of the gate of the first transistor T1 is not refreshed, that is, not only the data voltage Vdata will not be written into the gate of the first transistor T1, but also the first reset voltage Vref1 and the third reset voltage Vref3 will not be written into the gate of the first transistor T1, at this time, the voltage of the gate of the first transistor T1 remains the last written data voltage Vdata. Therefore, in this stage, the target voltage input end comprises a reset voltage input end, which is used to reset the anode or cathode of the light-emitting element OLED. For example, referring to Figure 2 In the embodiment, the second reset voltage Vref2 is electrically connected with the anode of the light-emitting element OLED, and by resetting the anode of the light-emitting element OLED with the first voltage different from the second voltage in the first frame of the frequency switching, the brightness of the first frame of the frequency switching can be optimized, thereby reducing the brightness jump of the first frame.

[0071] Further, the preset stage comprises a blanking stage, the target voltage input end comprises a reset voltage input end, and the reset voltage input end is electrically connected with the light-emitting element OLED, and the first voltage is less than the second voltage.

[0072] Specifically, the light-emitting element OLED is connected with the first power signal ELVDD as a positive power signal, and resetting the light-emitting element OLED with a lower voltage can reduce the brightness of the light-emitting element OLED, so that the first voltage generated is less than the second voltage in the first frame of the frequency switching, thereby suppressing the brightness jump of the frequency switching.

[0073] In an application scenario, referring to Figure 4 , the figure comprises a plurality of periods T, and the period T can be divided into a high-frequency period T1 and a low-frequency period T2, for example, the high-frequency period T1 and the low-frequency period T2 are both 1 second, Figure 4 which shows the case of high-frequency switching to low-frequency, the entire stage of the high-frequency period T1 can use the second voltage V2 to input the anode of the light-emitting element OLED, the high-frequency period T1 switches to the low-frequency period T2, therefore, the blanking stage Porch of the first low-frequency period T2 after the frequency switching uses the first voltage V1 to input the anode of the light-emitting element OLED, the frequency of the second low-frequency period T2 after the frequency switching is unchanged, therefore, the entire stage of the second low-frequency period T2 after the frequency switching continues to use the second voltage V2 to input the anode of the light-emitting element OLED.

[0074] In another application scenario, referring to Figure 5 , the figure comprises a plurality of periods T, and the period T can be divided into a high-frequency period T1 and a low-frequency period T2, for example, the high-frequency period T1 and the low-frequency period T2 are both 1, Figure 5The display is low frequency cut high frequency, the low frequency period T2 can be used in the second voltage V2 input anode of light emitting element OLED, low frequency period T2 to high frequency period T1 cut frequency, therefore, in the first high frequency period T1 of cut frequency, the first frame of the porch uses the first voltage V1 input anode of light emitting element OLED, the first frame after the first high frequency period T1 of cut frequency, the subsequent frame of the whole stage uses the second voltage V2 input anode of light emitting element OLED, the second high frequency period T1 of cut frequency is unchanged, therefore, the second high frequency period T1 of cut frequency continues to use the second voltage V2 input anode of light emitting element OLED.

[0075] In an embodiment, referring to Figure 6 The step S100 includes:

[0076] S111: when the brightness level of the next frame is one of the preset brightness levels, then input the first voltage to the reset voltage input end of the target pixel circuit in the preset stage of the next frame. Specifically, the preset brightness level can include multiple, can be any one or more of Nor1, Nor2, Nor3, Nor4, Nor5, Nor6, Nor7, Nor8 and Nor9 in the above embodiment, or other preset brightness levels, which are not specifically limited by the present application. In some application scenarios, it is not necessary to input the first voltage to the reset voltage input end of the target pixel circuit under all brightness levels, the phenomenon of frequency cutting brightness jump under part of the brightness levels is not easy to identify or very slight, especially under some high brightness levels, therefore, it is only necessary to input the first voltage to the reset voltage input end of the target pixel circuit under part of the brightness levels which need to be adjusted.

[0077] S112: when the brightness level of the next frame is not any one of the preset brightness levels, input the second voltage to the reset voltage input end of the target pixel circuit in the preset stage of the next frame.

[0078] Specifically, as mentioned in step S111, when the phenomenon of frequency cutting brightness jump under part of the brightness levels is not easy to identify or very slight, the second voltage can be input to the reset voltage input end of the target pixel circuit, without adjusting the voltage to adjust the brightness of the light emitting element.

[0079] Of course, in some other embodiments, the judgment of preset brightness level can not be performed, and the first voltage can be input to the reset voltage input end of the target pixel circuit in the preset stage of the next frame for all brightness levels.

[0080] In an embodiment, referring to Figure 7 The step S100 includes:

[0081] S121: when the second frame rate is less than the first frame rate, then generating the first voltage and inputting the first voltage to the target voltage input end in a preset phase of the next frame.

[0082] Specifically, when the second frame rate is less than the first frame rate, i.e. high frequency cutting low frequency, the first voltage can be inputted to the target voltage input end in the preset phase of the next frame. Figure 4 In the case of high frequency cutting low frequency, the inventor has found through further research that the time length of the first frame luminance jump after frequency cutting is close to the time length of the porch of the first frame. When cutting from high frequency to low frequency, the porch of the low frame rate is usually long (for example, the effective phase corresponding to 1 Hz is 1 / 120 s, and the corresponding porch is 119 / 120 s), and the luminance jump is easily perceived by the human eye. Therefore, in the case of high frequency cutting low frequency, the first voltage can be inputted to the target voltage input end in the preset phase of the next frame to reduce the luminance jump of the first frame after frequency cutting. For example, in the case of 120 Hz cutting 1 Hz, the first voltage needs to be inputted to the target voltage input end. Of course, the application is not limited to specific cases, as long as the second frame rate is less than the first frame rate.

[0083] S122: when the second frame rate is greater than the first frame rate, inputting the second voltage to the target voltage input end in a preset phase of the next frame.

[0084] Specifically, when the second frame rate is greater than the first frame rate, i.e. low frequency cutting high frequency, the second voltage can be inputted to the target voltage input end in the preset phase of the next frame. Figure 5 In the case of low frequency cutting high frequency, when cutting from low frequency to high frequency, the porch of the high frame rate is usually short, and the luminance jump in a short time is difficult for the human eye to perceive. Therefore, in the case of low frequency cutting high frequency, the second voltage can be inputted to the target voltage input end in the preset phase of the next frame.

[0085] Of course, in some other embodiments, the first voltage can also be inputted to the target voltage input end in the preset phase of the next frame in the case of low frequency cutting high frequency. For example, in the case of 1 Hz cutting 120 Hz, the first voltage needs to be inputted to the target voltage input end, which is a simpler setting method. Of course, the application is not limited to specific cases, as long as the second frame rate is greater than the first frame rate.

[0086] In an embodiment, referring to Figure 8 Before the above step S100, the method further comprises:

[0087] S101: when the first frame rate exceeds the frame rate threshold, then performing the step of generating the first voltage when the first frame rate and the second frame rate are different.

[0088] Specifically, the frame rate threshold is used to determine whether the first frame rate is a higher frame rate or a lower frame rate.

[0089] When the first frame rate exceeds the frame rate threshold, i.e., the first frame rate is a higher frame rate, since the higher frame rate has a large difference with the low frame rate of 1H or 10Hz when frequency switching, the coupling effect of the pixel circuit has a large difference, and the phenomenon of brightness jump in frequency switching is more likely to occur. Therefore, before the step of determining whether the first frame rate and the second frame rate are the same is performed, it can be determined whether the first frame rate exceeds the frame rate threshold.

[0090] S102: When the first frame rate does not exceed the frame rate threshold, in the preset stage of the next frame, the second voltage is input to the target voltage input end.

[0091] Specifically, as described in step S101, when the frequency is low, the first frame rate is switched to a low frame rate of 1H or 10Hz, since the difference between the first frame rate and the low frame rate is not large, the coupling effect of the pixel circuit has a small difference, and the phenomenon of brightness jump in frequency switching is not easy to occur. Therefore, the step of determining whether the first frame rate and the second frame rate are the same can not be performed, and the second voltage can be directly input to the target voltage input end in the preset stage of the next frame.

[0092] Referring to Figure 9 , Figure 9 is a structural schematic diagram of an embodiment of the display device. The display device 300 includes a processor 310, a memory 320, and a communication circuit 330. The processor 310 is coupled to the memory 320 and the communication circuit 330, respectively. The memory 320 stores program data. The processor 310 implements the steps in the method of any of the above embodiments by executing the program data in the memory 320. For details of the steps, refer to the above embodiments, which will not be repeated here.

[0093] The display device 300 can be a mobile phone, a tablet computer, a smart watch, a desktop computer, a notebook computer, or any other device with algorithm capability, which is not limited here.

[0094] Referring to Figure 10 , Figure 10 is a structural schematic diagram of an embodiment of the computer readable storage medium. The computer readable storage medium 400 stores a computer program 410. The computer program 410 can be executed by a processor to implement the steps in any of the above methods. For details of the method steps, refer to the above related content, which will not be repeated here.

[0095] The computer readable storage medium 400 can be a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, or any device capable of storing the computer program 410, or a server storing the computer program 410, which can send the stored computer program 410 to other devices for running, or can run the stored computer program 410.

[0096] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made by using the content of the specification and drawings of the present application, is also included in the patent protection scope of the present application.

Claims

1. A display driving method, characterized by, The driving method comprises: generating a first voltage when a first frame rate is different from a second frame rate, and inputting the first voltage to a target voltage input end of a target pixel circuit in a preset stage of a next frame, wherein the first frame rate is a frame rate of a current frame, and the second frame rate is a frame rate of the next frame; generating a second voltage when the first frame rate is the same as the second frame rate, and inputting the second voltage to the target voltage input end of the target pixel circuit in the preset stage of the next frame; wherein the first voltage is different from the second voltage; wherein the target voltage input end comprises a gray scale voltage input end, the step of generating the first voltage when the first frame rate is different from the second frame rate, and the step of generating the second voltage when the first frame rate is the same as the second frame rate comprise: generating the first voltage according to a first gamma voltage table, and generating the second voltage according to a second gamma voltage table; wherein the first gamma voltage table comprises gray scale voltage values of a plurality of binding point gray scales at at least one luminance level, the second gamma voltage table comprises gray scale voltage values of the plurality of binding point gray scales at the at least one luminance level, and the plurality of binding point gray scales comprise a target gray scale, wherein the gray scale voltage value of the target gray scale in the first gamma voltage table is not equal to the gray scale voltage value of the target gray scale in the second gamma voltage table at the same luminance level.

2. The driving method of claim 1, wherein: the preset stage comprises an effective stage.

3. The driving method according to claim 1, wherein the target gray scale is lower than a first gray scale threshold.

4. The driving method of claim 1, wherein: a driving transistor in the target pixel circuit is a P-type transistor.

5. The driving method of claim 1, wherein: the gray scale voltage value of the target gray scale in the first gamma voltage table is greater than the gray scale voltage value of the target gray scale in the second gamma voltage table at the same luminance level.

6. The driving method of claim 1, wherein: the first gamma voltage table and the second gamma voltage table are pre-stored in a driving chip; or, the second gamma voltage table is pre-stored in the driving chip, and the driving chip further stores a coefficient table comprising coefficients of the plurality of binding point gray scales at the at least one luminance level, and before the step of generating the first voltage according to the first gamma voltage table, the method further comprises: multiplying, for each of the binding point gray scales, the gray scale voltage value of the binding point gray scale in the second gamma voltage table at the luminance level with the coefficient of the binding point gray scale in the coefficient table at the luminance level to obtain the gray scale voltage value of the binding point gray scale in the first gamma voltage table at the luminance level.

7. The driving method of claim 1, wherein: the preset stage further comprises a blanking stage, the target voltage input end comprises a reset voltage input end, the reset voltage input end is electrically connected with a light emitting element, and the first voltage is less than the second voltage.

8. The driving method of claim 7, wherein the generating the first voltage when the first frame rate is different from the second frame rate and inputting the first voltage to the target voltage input of the target pixel circuit in the preset stage of the next frame comprises: inputting the first voltage to the reset voltage input of the target pixel circuit in the preset stage of the next frame when the luminance level of the next frame is one of the preset luminance levels; and inputting the second voltage to the reset voltage input of the target pixel circuit in the preset stage of the next frame when the luminance level of the next frame is not one of the preset luminance levels.

9. The driving method of claim 1, wherein the generating the first voltage when the first frame rate is different from the second frame rate and inputting the first voltage to the target voltage input of the target pixel circuit in the preset stage of the next frame comprises: generating the first voltage and inputting the first voltage to the target voltage input in the preset stage of the next frame when the second frame rate is less than the first frame rate; and inputting the second voltage to the target voltage input in the preset stage of the next frame when the second frame rate is greater than the first frame rate.

10. The driving method of any one of claims 1-9, wherein the generating the first voltage when the first frame rate is different from the second frame rate further comprises: performing the generating the first voltage when the first frame rate exceeds a frame rate threshold; and inputting the second voltage to the target voltage input in the preset stage of the next frame when the first frame rate does not exceed the frame rate threshold. The display device comprises a processor, a memory and a communication circuit, the processor is coupled to the memory and the communication circuit respectively, the memory stores program data, and the processor executes the program data in the memory to realize the steps in the method of any one of claims 1-10. The computer readable storage medium stores a computer program, and the computer program can be executed by the processor to realize the steps in the method of any one of claims 1-10. ​ 11. A display device, characterized by comprising: ​ 12. A computer-readable storage medium, characterized in that, ​

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