Driving method of display panel, measuring method of display panel, and display module

Abstract

The present invention provides a driving method for a display panel, a measuring method for a display panel, and a display module. The driving method includes: determining a rest frame data voltage according to a relationship table of the brightness of the display panel, the rest frame data voltage, and the flicker degree, and the brightness of the picture to be displayed before a display frame. By selecting a suitable rest frame data voltage to compensate for the threshold drift caused by the hysteresis effect of the first transistor, the present invention solves the problem that when driving at a low frequency, due to the hysteresis effect of the first transistor, the threshold voltage of the driving transistor drifts, thereby causing the display brightness of the display panel to be unstable, resulting in flicker.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and particularly to a driving method for a display panel, a measuring method for a display panel, and a display module. Background Art

[0002] With the continuous development of display technologies, the demand for low power consumption is increasing. While low-frequency driving can effectively reduce power consumption, low-frequency display is prone to the problem of screen flickering, which affects the display effect. The reason is that the luminous brightness of the display panel is determined by the magnitude of the current passing through the OLED (Organic Light-Emitting Diode), and the magnitude of the current is determined by the gate voltage of the driving transistor ( Figure 1 T1 in Figure 1 i.e., the Q-point voltage in ). However, during low-frequency driving, in the light-emitting stage of the driving cycle when the pixel driving circuit drives the light-emitting element for display, the gate voltage of the driving transistor generates a hysteresis effect, resulting in a drift of the threshold voltage of the driving transistor. The drift of the threshold voltage causes the display brightness of the display panel to be unstable, thereby forming flicker. Summary of the Invention

[0003] Embodiments of the present invention provide a driving method for a display panel, a measuring method for a display panel, and a display module to solve the problem that during low-frequency driving, due to the hysteresis effect generated by the driving transistor, the threshold voltage of the driving transistor drifts, resulting in unstable display brightness of the display panel and thus causing flicker.

[0004] To solve the above problems, the technical solutions provided by the embodiments of the present invention are as follows:

[0005] A driving method for a display panel for driving a display panel, the display panel including a plurality of sub-pixels and a plurality of pixel driving circuits for driving the corresponding sub-pixels, the pixel driving circuit including: a first transistor for generating a driving current according to a data voltage to drive the sub-pixel to emit light; a second transistor for transmitting the data voltage to the first transistor in response to a first scan signal; a third transistor for detecting the threshold voltage of the first transistor in response to a second scan signal; and a storage capacitor for storing the data voltage, the driving method including:

[0006] Step S1, obtaining a relationship table of the brightness, the data voltage of the blanking frame, and the flickering degree of the display panel;

[0007] Step S2, obtaining the data voltage of the blanking frame according to the brightness of the first screen and the relationship table;

[0008] Step S3, within the display frame, control the first scanning signal and the second scanning signal to turn on the second transistor and the third transistor, so that the display frame data voltage is transmitted to the gate of the first transistor to display the first picture, and the data voltage includes the display frame data voltage;

[0009] Step S4, within the blanking frame after the display frame, control the first scanning signal to turn on the second transistor, so that the blanking frame data voltage is transmitted to the source of the first transistor to display the first picture, and the data voltage includes the blanking frame data voltage.

[0010] According to a preferred embodiment of the present invention, step S1 further includes: obtaining a relationship table of the display frequency of the display panel, the brightness of the display panel, the blanking frame data voltage, and the flicker degree of the display panel;

[0011] Step S2 includes: obtaining the blanking frame data voltage corresponding to the minimum value of the flicker degree of the first picture according to the brightness of the first picture, the display frequency of the display panel corresponding to the first picture, and the relationship table.

[0012] According to a preferred embodiment of the present invention, the brightness of the first picture includes: the average brightness of a plurality of sub-pixels for displaying the first picture;

[0013] Step S2 includes: obtaining, according to the average brightness of a plurality of sub-pixels for displaying the first picture, the display frequency of the display panel corresponding to the first picture, and the relationship table: the blanking frame data voltage of a plurality of sub-pixels corresponding to the minimum value of the flicker degree of a plurality of sub-pixels at the average brightness.

[0014] According to a preferred embodiment of the present invention, the blanking frame data voltages of a plurality of pixel driving circuits corresponding to a plurality of sub-pixels are the same.

[0015] According to a preferred embodiment of the present invention, the brightness of the first picture includes: the brightness of each sub-pixel for displaying the first picture;

[0016] Step S2 includes: obtaining, according to the brightness of each sub-pixel for displaying the first picture, the display frequency of the display panel corresponding to the first picture, and the relationship table: the blanking frame data voltage of each sub-pixel corresponding to the minimum value of the flicker degree of each sub-pixel at the brightness of each sub-pixel.

[0017] According to a preferred embodiment of the present invention, the blanking frame data voltages of the plurality of pixel driving circuits corresponding to the plurality of sub-pixels with different brightnesses are different.

[0018] An embodiment of the present invention further provides a measurement method for a display panel, which is used to measure a display panel. The display panel includes a pixel driving circuit, and the pixel driving circuit includes: a first transistor, configured to generate a driving current according to a display frame data voltage within a display frame to drive a sub-pixel to emit light; a second transistor, configured to transmit the display frame data voltage to the first transistor in response to a first scan signal within the display frame, and configured to transmit a blanking frame data voltage to the source of the first transistor in response to the first scan signal within a blanking frame after the display frame; a third transistor, configured to detect a threshold voltage of the first transistor in response to a second scan signal; and a storage capacitor, configured to store the data voltage to the gate of the first transistor to compensate for the threshold voltage of the first transistor. The method includes:

[0019] When the display panel has a plurality of display frequencies and the display panel has a plurality of brightness levels, sequentially measure the flicker levels of the display panel corresponding to different blanking frame data voltages;

[0020] Generate a relationship table according to the plurality of display frequencies, the plurality of brightness levels, and the flicker levels of the display panel corresponding to different blanking frame data voltages;

[0021] Store the relationship table.

[0022] According to a preferred embodiment of the present invention, the device for measuring the flicker level of the display panel includes a color analyzer.

[0023] An embodiment of the present invention further provides a display module, including a display panel and a driver, wherein the driver includes:

[0024] A storage module, configured to store a relationship table, where the relationship table includes the corresponding relationship between the data voltage and the flicker level of the display panel at different brightness levels of the display panel at different frequencies;

[0025] An output module, configured to output a data signal to the display panel, and the data signal has the data voltage;

[0026] A control module, configured to control the output module to output a data signal to display a blanking frame image according to the data of the display frame image and the relationship table in the storage module.

[0027] According to a preferred embodiment of the present invention, the control of the output module to output the data signal for displaying the blanking frame image based on the data of the display frame image and the relationship table in the storage module includes:

[0028] The control module looks up, according to the frequency and brightness of the display frame image, the data voltage corresponding to the minimum value of the flicker degree under the frequency and brightness of the display panel in the relationship table, and controls the output module to output the data voltage to the display panel, so as to display the blanking frame image.

[0029] The beneficial effect of the present invention is that by selecting an appropriate blanking frame data voltage to compensate for the threshold drift caused by the hysteresis effect of the first transistor, the problem of unstable display brightness of the display panel and thus flicker caused by the threshold voltage drift of the driving transistor due to the hysteresis effect of the first transistor during low-frequency driving is solved. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Attached Figure 1 is a schematic structural diagram of a pixel driving circuit in the prior art;

[0032] Attached Figure 2 is a timing diagram of each signal of a pixel driving circuit in the prior art;

[0033] Attached Figure 3 is a schematic diagram of the relationship table of the present invention;

[0034] Attached Figure 4 is a schematic diagram of the relationship table of the present invention;

[0035] Attached Figure 5 is a schematic diagram of the relationship table of the present invention;

[0036] Attached Figure 6 is a schematic diagram of the relationship table of the present invention;

[0037] Attached Figure 7 is a schematic flow chart of the driving method of the display panel of the present invention;

[0038] Attached Figure 8 is a schematic flow chart of the measuring method of the display panel of the present invention. Detailed Embodiments

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0040] As Figure 1 shown, the display panel includes a plurality of sub-pixels and a plurality of pixel driving circuits corresponding to the plurality of sub-pixels. The pixel driving circuit is used to drive the sub-pixels to emit light. The pixel driving circuit includes: 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, a light-emitting element LED, a first storage capacitor C1, and a second storage capacitor C2.

[0041] Among them, the drain of the first transistor T1 is electrically connected to the first node A, the source of the first transistor T1 is electrically connected to the second node B, the gate of the first transistor T1 is electrically connected to the third node Q, the drain of the second transistor T2 is electrically connected to the data signal line to receive the data signal Data, the source of the second transistor T2 is electrically connected to the first node A, the gate of the second transistor T2 is electrically connected to the first scan signal line to respond to the first scan signal PScan(n), the drain of the third transistor T3 is electrically connected to the second node B, the source of the third transistor T3 is electrically connected to the third node Q, the gate of the third transistor T3 is electrically connected to the second scan signal line to respond to the second scan signal NScan(n), the drain of the fourth transistor T4 is electrically connected to the first reset signal line to receive the first reset signal V12, the source of the fourth transistor T4 is electrically connected to the third node Q, the gate of the fourth transistor T4 is electrically connected to the third scan signal line to respond to the third scan signal NScan(n - 7), the gates of the fifth transistor T5 and the sixth transistor T6 are both electrically connected to the enable signal line to respond to the enable signal EM, the drain of the fifth transistor T5 is electrically connected to the first power supply signal line to receive the first power supply signal ELVDD, the source of the fifth transistor T5 is electrically connected to the first node A, the drain of the sixth transistor T6 is electrically connected to the second node B, the source of the sixth transistor T6 is electrically connected to the anode of the light-emitting diode, the cathode of the light-emitting diode is electrically connected to the second power supply signal line to receive the second power supply signal ELVSS, the drain of the seventh transistor T7 is electrically connected to the second reset signal line to receive the second reset signal V11, the source of the seventh transistor T7 is electrically connected to the anode of the light-emitting diode, the gate of the seventh transistor T7 is electrically connected to the first scan signal line to respond to the first scan signal PScan(n), one end of the first storage capacitor C1 is electrically connected to the drain of the fifth transistor T5, the other end of the first storage capacitor C1 is electrically connected to the third node Q, one end of the second storage capacitor C2 is electrically connected to the first scan signal line, and the other end of the second storage capacitor C2 is electrically connected to the third node Q.

[0042] When the third scan signal NScan(n - 7) is at an effective level, the fourth transistor T4 is turned on, and the first reset signal V12 is written to the third node Q to reset the third node Q. When the first scan signal PScan(n) and the second scan signal NScan(n) are at effective levels, the first transistor T1, the second transistor T2, the third transistor T3, and the seventh transistor T7 are turned on, and the data signal Data is sequentially written from the first node A and the second node B to the third node Q. The second reset signal V11 resets the anode of the light-emitting element LED. When the enable signal EM is at an effective level, the first transistor T1, the fifth transistor T5, and the sixth transistor T6 are turned on, and the light-emitting element LED emits light. It can be known that the first transistor T1 is used to generate a driving current according to the data voltage of the data signal Data to drive the sub-pixel to emit light, so that the display panel displays a corresponding picture; the second transistor T2 is used to respond to the first scan signal PScan(n) to transmit the data voltage to the first transistor T1; the third transistor T3 is used to respond to the second scan signal NScan(n) to detect and compensate the threshold voltage of the first transistor T1, that is, to transmit the data voltage to the gate of the first transistor T1.

[0043] As Figure 2It is a timing diagram of each scanning signal during low-frequency driving. Among them, the first scanning signal PScan(n) is 120 Hz, and the second scanning signal NScan(n) and the third scanning signal NScan(n - 7) are 10 Hz. It can be seen that within every 12 frames, the first scanning signal PScan(n) has an effective level and an ineffective level in each frame, that is, the second transistor T2 writes a data voltage to the first node A in each frame, while the second scanning signal NScan(n) and the third scanning signal NScan(n - 7) are only at the effective level in the first frame. That is, the third transistor T3 and the fourth transistor T4 are only turned on in the first frame to reset the third node Q and write a data voltage to the third node Q. In the 2nd to 12th frames, the second scanning signal NScan(n) and the third scanning signal NScan(n - 7) are both at ineffective levels, and the third transistor T3 and the fourth transistor T4 are turned off, unable to reset the gate of the first transistor T1 and write a data voltage. The gate of the first transistor T1 keeps the data voltage written in the first frame during the 2nd to 12th frames until the arrival of the next 12 frames, thereby causing the first transistor T1 to have a hysteresis effect, and the threshold voltage of the first transistor T1 drifts. Due to the drift of the threshold voltage of the first transistor T1, when the gate voltages of the first transistor T1 are the same in the rest frame and the display frame, the currents flowing through are different, resulting in different emission brightnesses of the light-emitting element LED, causing the display brightness of the display panel to be unstable, thereby causing flicker.

[0044] For convenience of description, the first frame in which the second scanning signal NScan(n) and the third scanning signal NScan(n - 7) are at the effective level is called the display frame, the 2nd to 12th frames are called the rest frames, the voltage of the data signal Data corresponding to the display frame is called the display frame data voltage, and the voltage of the data signal Data corresponding to the rest frame is called the rest frame data voltage. That is, the data voltage of the data signal Data includes the display frame data voltage in the display frame stage and the rest frame data voltage in the rest frame stage. After the display frame data voltage is written to the gate of the first transistor T1 in the display frame, the gate of the first transistor T1 will maintain this voltage until the arrival of the next display frame.

[0045] This embodiment provides a driving method for a display panel to solve the problem that during low-frequency driving, due to the hysteresis effect of the first transistor T1, the threshold voltage of the first transistor T1 drifts, thereby causing the display brightness of the display panel to be unstable and resulting in flicker.

[0046] As Figure 7 shown, a driving method for a display panel is used to drive the display panel. The driving method includes:

[0047] Step S1, obtain a relationship table of the brightness, the rest frame data voltage, and the flicker degree of the display panel. The relationship table is as shown in Figure 3 、 Figure 4 and contains the relationship between the rest frame data voltage and the flicker degree at each brightness. As can be seen from Figure 3 、 Figure 4 , after determining the brightness of the display panel, the corresponding rest frame data voltage can be selected according to the required flicker degree.

[0048] Step S2, obtain the rest frame data voltage according to the brightness of the first frame and the relationship table. Specifically, before the display frame, obtain the brightness of the first frame to be displayed in the display frame and, according to the relationship table, obtain the corresponding relationship between the rest frame data voltage and the flicker degree at this brightness, and select the corresponding rest frame voltage according to the value of the required flicker degree. For example, at this brightness, select the rest frame data voltage corresponding to the minimum value according to the minimum value of the flicker degree. It can be known that the brightness of the first frame can be obtained by obtaining the data voltage of the pixel driving circuit corresponding to the sub-pixel for displaying the first frame. This is a conventional technical means for those skilled in the art and will not be elaborated here.

[0049] Step S3, within the display frame, control the first scan signal PScan(n) and the second scan signal NScan(n) to be at an effective level to turn on the second transistor T2 and the third transistor T3, so that the display frame data voltage is transmitted to the third node Q, and write the display frame data voltage into the first storage capacitor C1, the second storage capacitor C2, and the gate of the first transistor T1. The voltage at the first node A after stabilization is V data +V th , where the V data is the display frame data voltage, and the V th is the threshold voltage of the first transistor T1. After the display frame data voltage is written, control the enable signal EM to be at an effective level to turn on the fifth transistor T5 and the sixth transistor T6, so that the light-emitting element LED emits light to display the first frame. It can be known that the first frame is displayed by the light emission of multiple sub-pixels (light-emitting elements LED).

[0050] Step S4, within the blanking frame after the display frame, control the first scan signal PScan(n) to be at an effective level to turn on the second transistor T2, so that the blanking frame data voltage is written to the first node A and the second node B to compensate for the threshold voltage drift of the first transistor T1 caused by the hysteresis effect. After the writing of the blanking frame data voltage is completed, control the enable signal EM to be at an effective level to turn on the fifth transistor T5 and the sixth transistor T6, so that the light-emitting element LED continues to emit light to display the first picture. Since the threshold voltage drift of the first transistor T1 caused by the hysteresis effect has been compensated by the blanking frame data voltage before the first picture is displayed in the blanking frame, the brightness of the first picture displayed in the blanking frame is close to the brightness of the first picture displayed in the display frame. Therefore, the flicker degree of the display panel is reduced.

[0051] In this embodiment, by selecting an appropriate blanking frame data voltage to compensate for the threshold voltage drift caused by the hysteresis effect of the first transistor T1, the flicker caused by the hysteresis effect of the first transistor T1 is improved, and the display effect of the display panel is enhanced.

[0052] In some embodiments, since the display frequency of the display panel is also one of the important factors affecting the flicker degree, to further reduce the flicker, the relationship table may further include the frequency of the display panel, that is, the relationship table includes the corresponding relationship between the flicker degree and the blanking frame data voltage at different frequencies and different brightness levels, as Figures 3 to 6 shown. Therefore, step S1 further includes: obtaining the relationship table of the display frequency of the display panel, the brightness of the display panel, the blanking frame data voltage, and the flicker degree of the display panel. After determining the display frequency of the current display panel and the brightness of the display panel, the corresponding blanking frame data voltage can be selected according to the required flicker degree.

[0053] Step S2 includes: obtaining the blanking frame data voltage corresponding to the minimum value of the flicker degree of the first picture according to the brightness of the first picture, the display frequency of the display panel corresponding to the first picture, and the relationship table.

[0054] Specifically, as described above, the first screen is displayed by multiple sub-pixels. Therefore, the brightness of the first screen can be the average brightness of the multiple sub-pixels used to display the first screen. Thus, based on the average brightness of the multiple sub-pixels used to display the first screen, the display frequency of the display panel corresponding to the first screen, and the relationship table, the following can be obtained: at the average brightness, the rest frame data voltages of the multiple sub-pixels corresponding to the minimum value of the flicker degree of the multiple sub-pixels. At this time, the rest frame data voltages of the multiple pixel driving circuits corresponding to the multiple sub-pixels are all determined using the average brightness. Therefore, the rest frame data voltages of the multiple pixel driving circuits corresponding to the multiple sub-pixels are the same.

[0055] In some embodiments of the present invention, since the first screen is displayed by multiple sub-pixels, and the brightness of the first screen includes the brightness of each sub-pixel used to display the first screen, therefore, the rest frame data voltage of each sub-pixel can also be determined according to the brightness of each sub-pixel used to display the first screen.

[0056] Specifically, step S2 includes: based on the brightness of each sub-pixel used to display the first screen, the display frequency of the display panel corresponding to the first screen, and the relationship table, the following can be obtained: at the brightness of each sub-pixel, the rest frame data voltage of each sub-pixel corresponding to the minimum value of the flicker degree of each sub-pixel. At this time, since each sub-pixel determines the corresponding rest frame voltage according to its own brightness, the rest frame voltages of each sub-pixel will be different due to different brightnesses.

[0057] As Figure 8 shown, an embodiment of the present invention also provides a measurement method for a display panel, which is used to measure the relationship between the display frequency of the display panel, the brightness of the display panel, the rest frame data voltage, and the flicker degree of the display panel in the above display panel. Specifically, the method includes:

[0058] S100. When the display panel has multiple display frequencies and the display panel has multiple brightnesses, sequentially measure the flicker degree of the display panel corresponding to different rest frame data voltages.

[0059] Specifically, set the display panel to the first display frequency, and make the display panel sequentially display images with different gray-scale values, that is, the brightness of each image is different. Adjust the rest-frame data voltage at each brightness in sequence, and measure the flicker degree of the display panel. Then set the display panel to the second display frequency, adjust the rest-frame data voltage at each brightness in sequence, and measure the flicker degree of the display panel. Repeat the above steps until the relationship among the brightness of the display panel, the rest-frame data voltage, and the flicker degree of the display panel at the required display frequency of the display panel is measured. The flicker degree can be measured by a color analyzer.

[0060] S200. Generate a relationship table according to multiple display frequencies, multiple brightness levels, and the flicker degree of the display panel corresponding to different rest-frame data voltages.

[0061] Specifically, generate a relationship table according to multiple display frequencies, multiple brightness levels, and the flicker degree of the display panel corresponding to different rest-frame data voltages measured in the above steps.

[0062] S300. Store the relationship table. Specifically, store the relationship table in a relevant storage module.

[0063] An embodiment of the present invention further provides a display module, including a display panel and a driver, where the driver includes:

[0064] A storage module for storing a relationship table, where the relationship table includes the corresponding relationship between the data voltage and the flicker degree of the display panel at different brightness levels of the display panel at different frequencies. The relationship table can be measured by the measurement method in the above embodiment.

[0065] An output module for outputting a data signal to the display panel. Specifically, the output module is electrically connected to multiple data signal lines Data.

[0066] A control module for controlling the output module to output a data signal to display a rest-frame image according to the data of the display frame image and the relationship table in the storage module. Specifically, the control module searches for the data voltage corresponding to the minimum value of the flicker degree at the frequency of the display panel and the brightness of the display panel in the relationship according to the frequency and brightness of the display frame image, and controls the output module to output the data voltage to the display panel, so as to display a rest-frame image.

[0067] It can be known that the driver can be a commonly used drive IC (Integrated Circuit Chip) in the field, and the storage module, the output module and the control module are all registers responsible for corresponding functions in the drive IC.

[0068] In summary, although the present invention has been disclosed above with the preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those of ordinary skill in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A driving method for a display panel, which is used to drive a display panel. The display panel includes a plurality of sub-pixels and a plurality of pixel driving circuits for driving the corresponding sub-pixels. The pixel driving circuit includes: A first transistor for generating a driving current according to a data voltage to drive the sub-pixel to emit light; A second transistor for transmitting the data voltage to the first transistor in response to a first scan signal; A third transistor for detecting a threshold voltage of the first transistor in response to a second scan signal; And a storage capacitor for storing the data voltage, wherein the driving method includes: Step S1, obtaining a relationship table of the brightness, the rest frame data voltage and the flicker degree of the display panel, the relationship table being generated based on measurement data of the display panel at different frequencies and different brightnesses; Step S2, obtaining a rest frame data voltage according to the brightness of the first picture and the relationship table, the rest frame data voltage being used to compensate for threshold drift caused by the hysteresis effect of the first transistor; Step S3, within a display frame, controlling the first scan signal and the second scan signal to turn on the second transistor and the third transistor, so that the display frame data voltage is transmitted to the gate of the first transistor to display the first picture, the data voltage including the display frame data voltage; Step S4, within a rest frame after the display frame, controlling the first scan signal to turn on the second transistor, so that the rest frame data voltage is transmitted to the source of the first transistor to display the first picture, the data voltage including the rest frame data voltage.

2. The driving method of the display panel according to claim 1, wherein The step S1 further includes: obtaining the relationship table of the display frequency of the display panel, the brightness of the display panel, the rest frame data voltage and the flicker degree of the display panel; The step S2 includes: obtaining the rest frame data voltage corresponding to the minimum value of the flicker degree of the first picture according to the brightness of the first picture, the display frequency of the display panel corresponding to the first picture and the relationship table.

3. The driving method of the display panel according to claim 2, wherein The brightness of the first picture includes: the average brightness of a plurality of the sub-pixels for displaying the first picture; The step S2 includes: obtaining, according to the average brightness of a plurality of the sub-pixels for displaying the first picture, the display frequency of the display panel corresponding to the first picture and the relationship table: the rest frame data voltage of a plurality of the sub-pixels corresponding to the minimum value of the flicker degree of the plurality of the sub-pixels at the average brightness.

4. The driving method of the display panel according to claim 3, characterized in that, The rest frame data voltages of a plurality of pixel driving circuits corresponding to a plurality of the sub-pixels are the same.

5. The driving method of the display panel according to claim 2, wherein, The brightness of the first picture includes: the brightness of each of the sub-pixels for displaying the first picture; The step S2 includes: obtaining, according to the brightness of each of the sub-pixels for displaying the first picture, the display frequency of the display panel corresponding to the first picture and the relationship table: the rest frame data voltage of each of the sub-pixels corresponding to the minimum value of the flicker degree of each of the sub-pixels at the brightness of each of the sub-pixels.

6. The driving method of the display panel according to claim 5, wherein, The rest frame data voltages of a plurality of pixel driving circuits corresponding to a plurality of the sub-pixels with different brightnesses are different.

7. A measurement method for a display panel, used to measure a display panel, the display panel including a pixel driving circuit, and the pixel driving circuit including: A first transistor, configured to generate a driving current according to a display frame data voltage within a display frame to drive a sub-pixel to emit light; A second transistor, configured to transmit the display frame data voltage to the first transistor in response to a first scan signal within the display frame, and configured to transmit a rest frame data voltage to a source electrode of the first transistor in response to the first scan signal within a rest frame after the display frame; A third transistor, configured to detect a threshold voltage of the first transistor in response to a second scan signal; And a storage capacitor, configured to store the data voltage to a gate electrode of the first transistor to compensate for the threshold voltage of the first transistor, wherein the method includes: When the display panel has a plurality of display frequencies and the display panel has a plurality of brightness levels, sequentially measuring a flicker degree of the display panel corresponding to different rest frame data voltages; Generating a relation table according to the plurality of display frequencies, the plurality of brightness levels, and the flicker degree of the display panel corresponding to different rest frame data voltages; Storing the relation table, where the relation table is used to compensate for a threshold drift caused by a hysteresis effect of the first transistor.

8. The measuring method of the display panel according to claim 7, characterized in that, A device for measuring the flicker degree of the display panel includes a color analyzer.

9. A display module, characterized in that, Including a display panel and a driver, wherein the driver includes: A storage module, configured to store a relation table, where the relation table includes a correspondence between a data voltage and a flicker degree of the display panel at different brightness levels of the display panel at different frequencies; An output module, configured to output a data signal to the display panel, where the data signal has the data voltage; A control module, configured to control the output module to output a data signal to display a rest frame image according to data of a display frame image and the relation table in the storage module, and the control module dynamically adjusts a rest frame data voltage according to the relation table to compensate for a threshold drift caused by a hysteresis effect of a first transistor.

10. The display module according to claim 9, wherein The controlling the output module to output the data signal to display a rest frame image according to data of a display frame image and the relation table in the storage module includes: The control module looks up, in the relation table, a data voltage corresponding to a minimum value of the flicker degree at a frequency of the display frame image and a brightness of the display frame image, and controls the output module to output the data voltage to the display panel, so as to display the rest frame image.

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