Method and device for detecting flicker degree of display panel, and computer-readable storage medium

Abstract

Embodiments of the present application provide a method and apparatus for detecting the flicker degree of a display panel, and a computer-readable storage medium. The method includes: obtaining the brightness change rate of the display panel in a first time period and the brightness change rate in a second time period, where the first time period is at least a partial time period during the switching process of the display panel from a first refresh rate to a second refresh rate, and the second time period is a time period before the switching process or a time period after the switching process; determining the flicker degree of the display panel according to the brightness change rate of the display panel in the first time period and the brightness change rate in the second time period. Embodiments of the present application can quantitatively and accurately determine the severity of the flicker phenomenon of the display panel.

Description

Technical Field

[0001] This application belongs to the field of display technology, and particularly relates to a method and device for detecting the flicker degree of a display panel, and a computer-readable storage medium. Background Art

[0002] With the development of display technology, current display panels can select different refresh rates to display images. For example, in the normal display mode, the display panel can display images at a lower refresh rate. In the game mode, the display panel can display images at a higher refresh rate to improve the display quality and enhance the gaming experience.

[0003] The inventors of this application have found that to a certain extent, a flicker phenomenon will occur during the refresh rate switching process of the display panel. When the flicker phenomenon is severe, it will not only seriously affect the display effect, but also cause visual fatigue and discomfort to the observer. Therefore, it is necessary to measure and judge the severity of the flicker phenomenon of the display panel before it leaves the factory.

[0004] However, in the related art, it is difficult to quantitatively and accurately determine the severity of the flicker phenomenon of the display panel. Summary of the Invention

[0005] Embodiments of this application provide a method and device for detecting the flicker degree of a display panel, and a computer-readable storage medium, which can quantitatively and accurately determine the severity of the flicker phenomenon of the display panel, so as to provide a reference for the test and subsequent repair of the display panel.

[0006] In a first aspect, embodiments of this application provide a method for detecting the flicker degree of a display panel. The method includes: obtaining the brightness change rate of the display panel in a first time period and the brightness change rate of the display panel in a second time period, where the first time period is at least a partial time period during the switching process of the display panel from a first refresh rate to a second refresh rate, and the second time period is a time period before the switching process or a time period after the switching process; determining the flicker degree of the display panel according to the brightness change rate of the display panel in the first time period and the brightness change rate of the display panel in the second time period.

[0007] According to an embodiment of the first aspect of the present application, obtaining the brightness change rate of the display panel in the first time period and the brightness change rate in the second time period may specifically include: obtaining the brightness values of the display panel at a plurality of first moments in the first time period and the brightness values at a plurality of second moments in the second time period; determining the brightness change rate corresponding to the i-th first moment according to the brightness value at the (i - 1)-th first moment and the brightness value at the i-th first moment, where i is an integer greater than 1; determining the brightness change rate corresponding to the j-th second moment according to the brightness value at the (j - 1)-th second moment and the brightness value at the j-th second moment, where j is an integer greater than 1; determining the brightness change rate of the display panel in the first time period according to the brightness change rates corresponding to the plurality of first moments in the first time period; and determining the brightness change rate of the display panel in the second time period according to the brightness change rates corresponding to the plurality of second moments in the second time period.

[0008] In this way, by traversing the brightness change rates of any two adjacent first moments in the first time period, the brightness change rate of the display panel in the first time period is obtained; and by traversing the brightness change rates of any two adjacent second moments in the second time period, the brightness change rate of the display panel in the second time period is obtained, which can more objectively and accurately reflect the brightness change rate of the entire first time period and the entire second time period, and further enable the finally obtained flicker degree to more objectively and accurately characterize the severity of the flicker phenomenon of the display panel.

[0009] According to any of the foregoing embodiments of the first aspect of the present application, the brightness change rate corresponding to the i-th first moment is determined according to the following expression: ΔL1 i = |(L1 i - L1 i-1 ) / L1 i-1 * 100%|; where ΔL1 i represents the brightness change rate corresponding to the i-th first moment, L1 i represents the brightness value at the i-th first moment, and L1 i-1 represents the brightness value at the (i - 1)-th first moment.

[0010] According to any of the foregoing embodiments of the first aspect of the present application, the brightness change rate corresponding to the j-th second moment is determined according to the following expression: ΔL2 j = |(L2 j - L2 j-1 ) / L2 j-1 * 100%|; where ΔL2 j represents the brightness change rate corresponding to the j-th second moment, L2 j represents the brightness value at the j-th second moment, and L2 j-1 represents the brightness value at the (j - 1)-th second moment.

[0011] According to any of the foregoing embodiments of the first aspect of the present application, determining the brightness change rate of the display panel in the first time period according to the brightness change rates corresponding to multiple first moments in the first time period may specifically include: calculating the average value or the maximum value of the brightness change rates corresponding to multiple first moments in the first time period to obtain the brightness change rate of the display panel in the first time period; determining the brightness change rate of the display panel in the second time period according to the brightness change rates corresponding to multiple second moments in the second time period, which may specifically include: calculating the average value or the maximum value of the brightness change rates corresponding to multiple second moments in the second time period to obtain the brightness change rate of the display panel in the second time period.

[0012] In this way, by calculating the average value or the maximum value of the brightness change rates corresponding to multiple first moments in the first time period to obtain the brightness change rate of the display panel in the first time period, and calculating the average value or the maximum value of the brightness change rates corresponding to multiple second moments in the second time period to obtain the brightness change rate of the display panel in the second time period, the brightness change rate of the entire first time period and the brightness change rate of the entire second time period can be reflected more objectively and accurately, and further the finally obtained flicker degree can more objectively and accurately characterize the severity of the flicker phenomenon of the display panel.

[0013] According to any of the foregoing embodiments of the first aspect of the present application, before obtaining the brightness values of multiple first moments in the first time period and the brightness values of multiple second moments in the second time period of the display panel, the display panel flicker degree detection method may further include: setting a sampling interval or a sampling frequency of the brightness according to the visual persistence time; obtaining the brightness values of multiple first moments in the first time period and the brightness values of multiple second moments in the second time period of the display panel, which may specifically include: obtaining the brightness values of multiple first moments in the first time period and the brightness values of multiple second moments in the second time period of the display panel according to the sampling interval or the sampling frequency.

[0014] In this way, setting the sampling interval or the sampling frequency of the brightness according to the visual persistence time can, on the one hand, ensure that the finally obtained flicker degree is closer to the actual observation result of the human eye, and on the other hand, avoid setting the sampling interval or the sampling frequency of the brightness to be relatively dense, thereby reducing the quantity of brightness acquisition and the data processing amount, and improving the efficiency of the detection process.

[0015] According to any of the foregoing embodiments of the first aspect of the present application, obtaining the brightness values of the display panel at a plurality of first moments in the first time period and the brightness values of the display panel at a plurality of second moments in the second time period according to the sampling interval or the sampling frequency may specifically include: setting the number of sampling times of the brightness; obtaining the brightness values of the display panel at a plurality of moments in the target time period according to any one of the sampling interval and the sampling frequency and the number of sampling times, where the target time period includes the first time period and the second time period; in the target time period, controlling the display panel to first display the target grayscale image at the first refresh rate, and then switch from the first refresh rate to the second refresh rate to display the target grayscale image until the display panel displays the target grayscale image at the second refresh rate.

[0016] In this way, by setting the number of sampling times of the brightness, the target time period includes both the first time period and the second time period, which can ensure that the display panel smoothly completes the entire refresh rate switching process within the target time period, and thus the brightness values during the refresh rate switching process and the brightness values during the brightness stable stage can be collected.

[0017] According to any of the foregoing embodiments of the first aspect of the present application, the second time period is adjacent to the first time period.

[0018] In this way, by selecting the second time period adjacent to the first time period as a reference to compare the brightness changes between the first time period and the second time period to obtain the flicker degree, it more conforms to the change law of flicker, that is, flicker is the brightness change between adjacent times, and the obtained flicker degree can quantitatively and accurately determine the severity of the flicker phenomenon of the display panel.

[0019] According to any of the foregoing embodiments of the first aspect of the present application, the second time period is the time period before the switching process.

[0020] In this way, using the brightness change rate of the brightness stable stage (i.e., the second time period) before the switching process as a reference to compare the brightness changes between the first time period and the second time period to obtain the flicker degree, the obtained flicker degree can quantitatively and accurately determine the severity of the flicker phenomenon of the display panel.

[0021] According to any of the foregoing embodiments of the first aspect of the present application, the duration of the second time period is the same as the duration of the first time period.

[0022] According to any of the foregoing embodiments of the first aspect of the present application, determining the flicker degree of the display panel according to the brightness change rate of the display panel in the first time period and the brightness change rate of the display panel in the second time period may specifically include: calculating the difference between the brightness change rate of the display panel in the first time period and the brightness change rate of the display panel in the second time period, and using the difference as the flicker degree of the display panel.

[0023] In this way, by calculating the relative change rate of the brightness of the display panel in the first time period and the second time period, the flicker degree used to characterize the severity of the flicker phenomenon can be obtained, and the severity of the flicker phenomenon of the display panel can be quantitatively and accurately determined, thereby providing a reference for the test and subsequent repair of the display panel.

[0024] According to any of the foregoing embodiments of the first aspect of the present application, after determining the flicker degree of the display panel, the method may further include: comparing the magnitude relationship between the flicker degree and a preset flicker degree threshold; when the flicker degree is less than or equal to the preset flicker degree threshold, determining that the flicker degree of the display panel is qualified; when the flicker degree is greater than the preset flicker degree threshold, determining that the flicker degree of the display panel is unqualified.

[0025] In this way, after obtaining the flicker degree of the display panel, the flicker degree can be used to determine whether the flicker degree of the display panel is qualified, so as to facilitate the detection of good products and subsequent repair of the display panel, and ensure that the display panel after leaving the factory has a good display effect.

[0026] According to any of the foregoing embodiments of the first aspect of the present application, the method may further include: when the flicker degree is greater than the preset flicker degree threshold, readjusting the data voltage values corresponding to the sub-pixels of at least one color in the display panel, and returning to the step of comparing the magnitude relationship between the flicker degree and the preset flicker degree threshold until the flicker degree of the display panel is less than or equal to the preset flicker degree threshold.

[0027] In this way, by repairing the display panel with an unqualified flicker degree, the yield rate of the display panel can be improved, and it is ensured that the display panel after leaving the factory has a good display effect.

[0028] In a second aspect, an embodiment of the present application provides a flicker degree detection device for a display panel. The flicker degree detection device for a display panel is used to execute the flicker degree detection method for a display panel provided in the first aspect. The flicker degree detection device for a display panel includes: a lighting device for providing a target gray scale image to the display panel; an optical measurement device for obtaining the brightness values of the display panel at a plurality of first moments in the first time period and the brightness values of the display panel at a plurality of second moments in the second time period; a controller electrically connected to the optical measurement device for determining the brightness change rate of the display panel in the first time period and the brightness change rate of the display panel in the second time period according to the brightness values of the display panel at a plurality of first moments in the first time period and the brightness values of the display panel at a plurality of second moments in the second time period; and determining the flicker degree of the display panel according to the brightness change rate of the display panel in the first time period and the brightness change rate of the display panel in the second time period.

[0029] In a third aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for detecting the flicker degree of a display panel provided in the first aspect are implemented.

[0030] The method and device for detecting the flicker degree of a display panel and the computer-readable storage medium according to the embodiments of the present application use brightness as the test object and evaluation basis for the severity of the flicker phenomenon, use the brightness change rate in the first time period during the refresh rate switching process as the main body, and use the brightness change rate in the brightness stable stage (i.e., the second time period) before or after the refresh rate switching as a reference to obtain the flicker degree for characterizing the severity of the flicker phenomenon. It fully considers the brightness change and can quantitatively and accurately determine the severity of the flicker phenomenon of the display panel, thereby providing a reference for the test and subsequent repair of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0032] Figure 1 It is a brightness schematic diagram of an LTPO display panel when switching from a higher refresh rate to a lower refresh rate;

[0033] Figure 2 It is a flowchart of a method for detecting the flicker degree of a display panel provided by an embodiment of the present application;

[0034] Figure 3 It is an operation schematic diagram of a method for detecting the flicker degree of a display panel provided by an embodiment of the present application;

[0035] Figure 4 It is a flowchart of step S101 in the method for detecting the flicker degree of a display panel provided by an embodiment of the present application;

[0036] Figure 5 It is another flowchart of a method for detecting the flicker degree of a display panel provided by an embodiment of the present application;

[0037] Figure 6 It is another flowchart of step S101 in the method for detecting the flicker degree of a display panel provided by an embodiment of the present application;

[0038] Figure 7 It is an operation schematic diagram of a method for detecting the flicker degree of a display panel provided by an embodiment of the present application;

[0039] Figure 8Another schematic flowchart of the method for detecting the flicker degree of the display panel provided by the embodiment of the present application;

[0040] Figure 9 An operation schematic diagram of the method for detecting the flicker degree of the display panel provided by the embodiment of the present application;

[0041] Figure 10 A schematic diagram of the hardware structure of the electronic device provided by the embodiment of the present application. Detailed implementation manners

[0042] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than limiting the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present application by showing examples of the present application.

[0043] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the elements defined by the statement "including..." do not exclude the existence of additional identical elements in the process, method, article or device including the said elements.

[0044] It should be understood that the term "and / or" used herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0045] Without departing from the spirit or scope of the present application, various modifications and changes can be made to the present application, which are obvious to those skilled in the art. Therefore, the present application is intended to cover the modifications and changes of the present application that fall within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided by the embodiments of the present application can be combined with each other without contradiction.

[0046] Before elaborating on the technical solutions provided by the embodiments of the present application, for the convenience of understanding the embodiments of the present application, the present application first specifically describes the problems existing in the related technologies:

[0047] With the development of display technologies, current display panels can select different refresh rates to display images. For example, in the normal display mode, the display panel can display images at a lower refresh rate. In the game mode, the display panel can display images at a higher refresh rate to improve the display quality and enhance the gaming experience. The inventors of the present application have found that there will be a certain degree of flickering phenomenon during the refresh rate switching process of the display panel.

[0048] For example, taking a Low Temperature Polycrystalline Oxide (LTPO) display panel as an example, where the LTPO display panel is a display panel with Thin Film Transistors (TFTs) having indium gallium zinc oxide (IGZO) as the active layer and TFTs having low temperature polysilicon (LTPS) as the active layer. Since the leakage current of the transistors in the LTPO display panel is small, the LTPO display panel can support low refresh rate displays, such as refresh rates of 10 Hz or even 1 Hz. The LTPO display panel can achieve free switching of the refresh rate. For example, it can be switched to a higher refresh rate such as 120 Hz during video or gaming, and can be switched to a lower refresh rate such as 10 Hz or even 1 Hz during standby, e-reader, or screen-off states.

[0049] Figure 1 It is a brightness schematic diagram of the LTPO display panel when switching from a higher refresh rate to a lower refresh rate. Figure 1 The abscissa of can represent time, Figure 1 The ordinate of can represent the brightness of the display panel. As Figure 1 shown, when the LTPO display panel switches from a higher refresh rate to a lower refresh rate, such as when switching from a 120 Hz refresh rate to a 1 Hz refresh rate, there is a brightness jump phenomenon at the moment of switching. Since the brightness jump time is greater than the visual persistence time of the human eye (such as 41.6 ms), there will be a flickering phenomenon due to unstable brightness at the moment of refresh rate switching.

[0050] When the flickering phenomenon is severe, it will not only seriously affect the display effect, but also cause visual fatigue and discomfort to the observer. Therefore, it is necessary to measure and judge the severity of the flickering phenomenon of the display panel before it leaves the factory. However, in the related technologies, it is difficult to quantitatively and accurately determine the severity of the flickering phenomenon of the display panel.

[0051] In view of the above research findings of the inventors, embodiments of the present application provide a method and device for detecting the flicker degree of a display panel, and a computer-readable storage medium, which can solve the technical problem in the related art that it is difficult to quantitatively and accurately determine the severity of the flicker phenomenon of the display panel.

[0052] The technical concept of the embodiments of the present application lies in: using brightness as the test object and evaluation basis for the severity of the flicker phenomenon, using the brightness change rate in the first time period during the refresh rate switching process as the main body, and using the brightness change rate in the brightness stable stage (i.e., the second time period) before or after the refresh rate switching as a reference, to obtain the flicker degree used to characterize the severity of the flicker phenomenon. It fully considers the brightness change and can quantitatively and accurately determine the severity of the flicker phenomenon of the display panel, thereby providing a reference for the test and subsequent repair of the display panel.

[0053] First, the method for detecting the flicker degree of the display panel provided by the embodiments of the present application will be introduced below. Among them, the display panel includes but is not limited to an LTPO display panel.

[0054] Figure 2 It is a schematic flowchart of a method for detecting the flicker degree of a display panel provided by an embodiment of the present application. As Figure 2 shown, the method for detecting the flicker degree of the display panel provided by the embodiments of the present application may include the following steps S101 and S102.

[0055] S101. Obtain the brightness change rate of the display panel in the first time period and the brightness change rate in the second time period.

[0056] Figure 3 It is an operation schematic diagram of a method for detecting the flicker degree of a display panel provided by an embodiment of the present application. Figure 3 The abscissa of can represent time, Figure 3 A in can represent the brightness change curve of the display panel over time, Figure 3 B in can represent the brightness change rate change curve of the display panel over time. As Figure 3 shown, for example, the duration of the switching process a when the display panel switches from the first refresh rate to the second refresh rate is t1. Among them, the first time period T1 can be at least part of the switching process a when the display panel switches from the first refresh rate to the second refresh rate. For example, in some examples, the first time period T1 may include the entire switching process a, that is, the duration of the first time period T1 may be equal to t1. Of course, in other examples, the first time period T1 may also be part of the entire switching process a. For example, in chronological order, the switching process a is evenly divided into 10 sub-time periods, and the first time period T1 may include the 2nd to 9th sub-time periods. The embodiments of the present application do not limit this.

[0057] Continue to refer to Figure 3 , the second time period T2 can be the time period before or after the switching process a. That is, the second time period T2 can be the time period when the display panel displays the picture at the first refresh rate, and the second time period T2 can also be the time period when the display panel displays the picture at the second refresh rate. As can be seen from Figure 3 , in the second time period T2, the brightness of the display panel tends to be stable, so the second time period T2 can be regarded as the brightness stable stage.

[0058] S102. Determine the flicker degree of the display panel according to the brightness change rate of the display panel in the first time period and the brightness change rate in the second time period. Among them, the flicker degree is used to characterize the brightness flicker degree of the display panel, that is, the severity of the flicker phenomenon of the display panel.

[0059] As can be seen from Figure 3 , flicker means that there is a large change in brightness between the brightness of the previous period and the brightness of the next period. That is, the reason for the flicker phenomenon is that the brightness of the display panel changes greatly at adjacent times. Therefore, brightness is an important factor leading to the flicker phenomenon.

[0060] In view of this, in the method for detecting the flicker degree of the display panel according to the embodiments of the present application, the brightness is used as the test object and evaluation basis for the severity of the flicker phenomenon. The brightness change rate in the first time period during the refresh rate switching process is used as the main body, and the brightness change rate in the brightness stable stage (i.e., the second time period) before or after the refresh rate switching is used as a reference to obtain the flicker degree for characterizing the severity of the flicker phenomenon. The brightness change is fully considered, and the severity of the flicker phenomenon of the display panel can be quantitatively and accurately determined, thereby providing a reference for the test and subsequent repair of the display panel.

[0061] The specific implementation manners of the above steps will be introduced below.

[0062] First, S101 is introduced: Obtain the brightness change rate of the display panel in the first time period and the brightness change rate in the second time period.

[0063] Figure 4 This is a schematic flowchart of step S101 in the method for detecting the flicker degree of the display panel provided by the embodiments of the present application. As Figure 4 shown, according to some embodiments of the present application, optionally, S101 may specifically include the following steps S401 to S405.

[0064] S401. Obtain the brightness values of multiple first moments in the first time period of the display panel and the brightness values of multiple second moments in the second time period.

[0065] Taking the second time period T2 as an example of the time period before the switching process a, for example, the display panel can be controlled to display the target grayscale image at the first refresh rate, and then the luminance values of the display panel at multiple moments are collected by an optical measurement device, so as to obtain the luminance values of the display panel at multiple moments in the second time period (i.e., the luminance stable stage). Here, for the convenience of distinction, each moment in the second time period is called the second moment. Among them, the first refresh rate can be any refresh rate. The target grayscale image can be an image of any grayscale from 0 to 255 grayscale, and the embodiments of the present application do not limit this, such as a 48 grayscale image, a 255 grayscale image, a 127 grayscale image, or an 8 grayscale image, etc. The optical measurement device includes but is not limited to a colorimeter or a color analyzer.

[0066] Then, the display panel can be controlled to switch from the first refresh rate to the second refresh rate to display the target grayscale image, and the luminance values of the display panel at multiple moments are collected by an optical measurement device, so as to obtain the luminance values of the display panel at multiple moments in the first time period (i.e., the flicker stage). Here, for the convenience of distinction, each moment in the first time period is called the first moment. Among them, the second refresh rate can be any refresh rate. In some examples, optionally, the second refresh rate can be less than the first refresh rate, that is, the first refresh rate is a higher refresh rate and the second refresh rate is a lower refresh rate.

[0067] S402. Determine the luminance change rate corresponding to the i-th first moment according to the luminance value of the (i - 1)-th first moment and the luminance value of the i-th first moment, where i is an integer greater than 1.

[0068] In S402, for any first moment in the first time period, for example, the luminance change rate corresponding to the i-th first moment can be calculated according to the luminance value of the (i - 1)-th first moment and the luminance value of the i-th first moment.

[0069] In some specific examples, optionally, for example, the luminance change rate corresponding to the i-th first moment can be determined according to the following expression:

[0070] ΔL1 i =|(L1 i -L1 i-1 ) / L1 i-1 *100%| (1)

[0071] Wherein, ΔL1 i represents the luminance change rate corresponding to the i-th first moment, L1 i represents the luminance value of the i-th first moment, and L1 i-1 represents the luminance value of the (i - 1)-th first moment.

[0072] S403. Determine the brightness change rate corresponding to the j-th second moment based on the brightness value at the (j - 1)-th second moment and the brightness value at the j-th second moment, where j is an integer greater than 1.

[0073] In S403, for any second moment in the second time period, for example, the brightness change rate corresponding to the j-th second moment can be calculated based on the brightness value at the (j - 1)-th second moment and the brightness value at the j-th second moment.

[0074] In some specific examples, optionally, for example, the brightness change rate corresponding to the j-th second moment can be determined according to the following expression:

[0075] ΔL2 j =|(L2 j -L2 j-1 ) / L2 j-1 *100%| (2)

[0076] Where, ΔL2 j represents the brightness change rate corresponding to the j-th second moment, L2 j represents the brightness value at the j-th second moment, and L2 j-1 represents the brightness value at the (j - 1)-th second moment.

[0077] S404. Determine the brightness change rate of the display panel in the first time period based on the brightness change rates corresponding to multiple first moments in the first time period.

[0078] In S404, the brightness change rate of the display panel in the entire first time period can be determined based on the brightness change rates corresponding to multiple first moments in the first time period.

[0079] S405. Determine the brightness change rate of the display panel in the second time period based on the brightness change rates corresponding to multiple second moments in the second time period.

[0080] Similarly, in S405, the brightness change rate of the display panel in the second time period can be determined based on the brightness change rates corresponding to multiple second moments in the second time period.

[0081] In this way, by traversing the brightness change rates of any two adjacent first moments in the first time period, the brightness change rate of the display panel in the first time period is obtained; and by traversing the brightness change rates of any two adjacent second moments in the second time period, the brightness change rate of the display panel in the second time period is obtained, which can more objectively and accurately reflect the brightness change rate of the entire first time period and the entire second time period, and further enable the finally obtained flicker degree to more objectively and accurately characterize the severity of the flicker phenomenon of the display panel.

[0082] In some specific embodiments, optionally, S404. Determine the brightness change rate of the display panel in the first time period according to the brightness change rates corresponding to multiple first moments in the first time period. Specifically, the following steps may be included:

[0083] Calculate the average value of the brightness change rates corresponding to multiple first moments in the first time period to obtain the brightness change rate of the display panel in the first time period.

[0084] Specifically, assume that the brightness change rates corresponding to m first moments in the first time period are obtained, where m is a positive integer. For example, the brightness change rate of the display panel in the first time period can be obtained according to the following expression:

[0085]

[0086] Among them, X represents the brightness change rate of the display panel in the first time period, and ΔL1 i represents the brightness change rate corresponding to the i-th first moment.

[0087] Correspondingly, in some specific embodiments, optionally, S404. Determine the brightness change rate of the display panel in the second time period according to the brightness change rates corresponding to multiple second moments in the second time period. Specifically, the following steps may be included:

[0088] Calculate the average value of the brightness change rates corresponding to multiple second moments in the second time period to obtain the brightness change rate of the display panel in the second time period.

[0089] Specifically, assume that the brightness change rates corresponding to n second moments in the second time period are obtained, where n is a positive integer. For example, the brightness change rate of the display panel in the second time period can be obtained according to the following expression:

[0090]

[0091] Among them, Y represents the brightness change rate of the display panel in the second time period, and ΔL2 j represents the brightness change rate corresponding to the j-th second moment.

[0092] In addition to the above method of calculating the average value, in some other specific embodiments, optionally, S404. Determine the brightness change rate of the display panel in the first time period according to the brightness change rates corresponding to multiple first moments in the first time period. Specifically, the following steps may be included:

[0093] Calculate the maximum value of the brightness change rates corresponding to multiple first moments in the first time period to obtain the brightness change rate of the display panel in the first time period.

[0094] For example, if the brightness change rates corresponding to m first moments in the first time period are obtained in total, the maximum brightness change rate can be selected from the brightness change rates corresponding to the m first moments as the brightness change rate of the display panel in the first time period. That is, the brightness change rate when the brightness changes most violently in the first time period can be used as the brightness change rate of the display panel in the first time period.

[0095] Correspondingly, in some other specific embodiments, optionally, S404: Determine the brightness change rate of the display panel in the second time period according to the brightness change rates corresponding to multiple second moments in the second time period, which may specifically include the following steps:

[0096] Calculate the maximum value of the brightness change rates corresponding to multiple second moments in the second time period to obtain the brightness change rate of the display panel in the second time period.

[0097] For example, if the brightness change rates corresponding to n second moments in the second time period are obtained in total, the maximum brightness change rate can be selected from the brightness change rates corresponding to the n second moments as the brightness change rate of the display panel in the second time period. That is, the brightness change rate when the brightness changes most violently in the second time period can be used as the brightness change rate of the display panel in the second time period.

[0098] Figure 5 Another flowchart of the method for detecting the flicker degree of the display panel provided by the embodiments of the present application. As Figure 5 shown, according to some embodiments of the present application, optionally, before S101: Obtain the brightness values of the display panel at multiple first moments in the first time period and the brightness values of the display panel at multiple second moments in the second time period, the method for detecting the flicker degree of the display panel provided by the embodiments of the present application may further include the following steps:

[0099] S501: Set the sampling interval or sampling frequency of the brightness according to the persistence of vision time.

[0100] The phenomenon of persistence of vision is the phenomenon that the vision generated by light on the retina still remains for a period of time after the light stops acting. Its specific application is the shooting and projection of movies. For example, when an object is moving rapidly, when the image seen by the human eye disappears, the human eye can still continue to retain the image for about 0.1 - 0.4 seconds. This phenomenon is called the persistence of vision phenomenon. Correspondingly, the persistence of vision time can be, for example, 0.1 - 0.4 seconds. In some specific examples, the persistence of vision time can be, for example, 41.6 ms.

[0101] In step S501, for example, the sampling interval of the brightness can be set to be equal to or slightly less than the persistence of vision time. Alternatively, the sampling frequency of the brightness can be set according to the persistence of vision time. Taking the persistence of vision time of 41.6 ms as an example, for example, the sampling interval of the brightness can be set to 41.6 ms or slightly less than 41.6 ms, such as 38 ms. In some specific examples, considering the software processing time and data transmission time, for example, the sampling interval w of the brightness can be set to w = T - Δt. Wherein, T represents the persistence of vision time, Δt represents the software processing time and data transmission time, and w represents the sampling interval. For example, when Δt is about 4 ms to 5 ms, the sampling interval w can be set to 37 ms. In this way, the actual interval for measuring a brightness value is about 41.6 ms, and the interval for actually measuring a brightness value is close to the persistence of vision time T. Alternatively, the sampling frequency of the brightness can also be set according to the persistence of vision time T, such as f ≈ 1 / T. Wherein, f represents the sampling frequency of the brightness. For example, the sampling frequency of the brightness is set to collect 24 brightness values per second.

[0102] Correspondingly, S101, obtaining the brightness values at multiple first moments in the first time period and the brightness values at multiple second moments in the second time period of the display panel may specifically include the following steps:

[0103] According to the set sampling interval or sampling frequency of the brightness, obtain the brightness values at multiple first moments in the first time period and the brightness values at multiple second moments in the second time period of the display panel.

[0104] Exemplarily, for example, according to the sampling frequency of collecting 24 brightness values per second, obtain the brightness values at multiple first moments in the first time period and the brightness values at multiple second moments in the second time period of the display panel.

[0105] In this way, according to the persistence of vision time, setting the sampling interval or sampling frequency of the brightness can, on the one hand, ensure that the finally obtained flicker degree is closer to the actual observation result of the human eye, and on the other hand, avoid setting the sampling interval or sampling frequency of the brightness to be relatively dense, thereby reducing the quantity of brightness collection and data processing volume and improving the efficiency of the detection process.

[0106] Figure 6 Another flowchart of step S101 in the method for detecting the flicker degree of the display panel provided by the embodiment of the present application. As Figure 6 shown, according to some embodiments of the present application, optionally, S101, according to the sampling interval or sampling frequency, obtain the brightness values at multiple first moments in the first time period and the brightness values at multiple second moments in the second time period of the display panel, which may specifically include the following steps S601 to S603.

[0107] S601, set the sampling number of the brightness.

[0108] Among them, the number of samplings can be flexibly set according to the actual situation, and the embodiments of the present application do not limit this. In S601, the specific value of the number of samplings can be determined according to the durations of the first time period and the second time period to ensure that the entire refresh rate switching process is completed during the sampling process. For example, the product of the number of samplings and the sampling interval (i.e., the duration required for the sampling process) can be at least greater than the sum of the durations of the first time period and the second time period.

[0109] S602. Obtain the brightness values of the display panel at multiple moments in the target time period according to any one of the sampling interval and the sampling frequency and the number of samplings. The target time period includes the first time period and the second time period.

[0110] After the number of samplings and any one of the sampling interval and the sampling frequency are determined, the brightness values of the display panel at multiple moments in the target time period can be obtained according to any one of the sampling interval and the sampling frequency and the number of samplings. Among them, the duration of the target time period is the product of the number of samplings and the sampling interval. The target time period can span the first time period and the second time period.

[0111] For example, Figure 7 is an operation schematic diagram of the method for detecting the flicker degree of the display panel provided by the embodiments of the present application. Figure 7 The abscissa of can represent time, Figure 7 A in can represent the curve of the brightness of the display panel changing with time, Figure 7 B in can represent the curve of the brightness change rate of the display panel changing with time. As Figure 7 shown, the target time period T3 can span the first time period T1 and the second time period T2 to ensure that the entire refresh rate switching process is completed during the sampling process.

[0112] For example, in some examples, the number of samplings is set to 300 times, and the duration of the target time period T3 is about 12.5 seconds, and the 12.5 seconds includes the first time period T1 and the second time period T2.

[0113] S603. In the target time period, control the display panel to first display the target gray scale image at the first refresh rate, and then switch from the first refresh rate to the second refresh rate to display the target gray scale image until the display panel displays the target gray scale image at the second refresh rate.

[0114] Taking the second time period T2 as the time period before the switching process a as an example, for instance, the lighting device can be used to control the display panel to display the target gray-scale image at the first refresh rate, and then the optical measurement device can be used to collect the brightness values of the display panel at multiple moments, so as to obtain the brightness values of the display panel at multiple second moments in the second time period (i.e., the brightness stable stage). Then, the lighting device can be used to control the display panel to switch from the first refresh rate to the second refresh rate to display the target gray-scale image, and the optical measurement device can be used to collect the brightness values of the display panel at multiple moments, so as to obtain the brightness values of the display panel at multiple first moments in the first time period (i.e., the flashing stage).

[0115] It should be noted that when the second time period T2 is the time period after the switching process a, the optical measurement device can be used to collect the brightness values of the display panel at multiple moments when the display panel displays the target gray-scale image at the second refresh rate, so as to obtain the brightness values of the display panel at multiple second moments in the second time period (i.e., the brightness stable stage).

[0116] In this way, by setting the sampling times of the brightness, the target time period includes both the first time period and the second time period, which can ensure that the display panel smoothly completes the entire refresh rate switching process within the target time period, and then the brightness values during the refresh rate switching process and the brightness values during the brightness stable stage can be collected.

[0117] Continue to refer to Figure 7 , according to some embodiments of the present application, optionally, the second time period T2 can be adjacent to the first time period T1.

[0118] In this way, by using the second time period adjacent to the first time period as a reference to compare the brightness changes between the first time period and the second time period to obtain the flicker degree, it is more in line with the change law of flicker, that is, flicker is the brightness change between adjacent times, and the obtained flicker degree can quantitatively and accurately determine the severity of the flicker phenomenon of the display panel.

[0119] Continue to refer to Figure 7 , according to some embodiments of the present application, optionally, the second time period T2 can be the time period before the switching process a.

[0120] In this way, taking the brightness change rate of the brightness stable stage (i.e., the second time period) before the switching process as a reference to compare the brightness changes between the first time period and the second time period to obtain the flicker degree, the obtained flicker degree can quantitatively and accurately determine the severity of the flicker phenomenon of the display panel.

[0121] Continue to refer to Figure 7 , according to some embodiments of the present application, optionally, the duration of the second time period T2 is the same as the duration of the first time period T1.

[0122] It should be noted that the duration of the second time period T2 may also be different from the duration of the first time period T1, and the embodiments of the present application do not limit this. In addition, the duration of the first time period T1 and the duration of the second time period T2 can be flexibly adjusted according to the actual situation, and the embodiments of the present application do not limit this. For example, the duration of the first time period T1 and the duration of the second time period T2 can be determined according to the duration of the refresh rate switching process. If the refresh rate switching process lasts for 1 to 2 seconds, the duration of the first time period T1 and the duration of the second time period T2 can be 1 to 2 seconds.

[0123] The following introduces the specific implementation manner of step S102.

[0124] S102. Determine the flicker degree of the display panel according to the brightness change rate of the display panel in the first time period and the brightness change rate in the second time period, which may specifically include:

[0125] Calculate the difference between the brightness change rate of the display panel in the first time period and the brightness change rate of the display panel in the second time period, and use the difference as the flicker degree of the display panel.

[0126] Specifically, for example, the flicker degree of the display panel can be determined according to the following expression:

[0127] Z = X - Y (5)

[0128] Among them, Z represents the flicker degree of the display panel, X represents the brightness change rate of the display panel in the first time period, and Y represents the brightness change rate of the display panel in the second time period.

[0129] In this way, by calculating the relative brightness change rates of the display panel in the first time period and the second time period, the flicker degree used to characterize the severity of the flicker phenomenon is obtained, and the severity of the flicker phenomenon of the display panel can be determined quantitatively and accurately, thereby providing a reference for the testing and subsequent repair of the display panel.

[0130] Figure 8 This is another flow schematic diagram of the flicker degree detection method for the display panel provided by the embodiments of the present application. As Figure 8 shown, according to some embodiments of the present application, optionally, after S102, determining the flicker degree of the display panel, the flicker degree detection method for the display panel provided by the embodiments of the present application may further include the following steps S801 to S803.

[0131] S801. Compare the size relationship between the flicker degree and a preset flicker degree threshold.

[0132] S802. When the flicker degree is less than or equal to the preset flicker degree threshold, determine that the flicker degree of the display panel is qualified.

[0133] S803. When the flicker degree is greater than a preset flicker degree threshold, it is determined that the flicker degree of the display panel is unqualified.

[0134] It should be noted that the preset flicker degree threshold can be determined, for example, according to the historical detection data of multiple display panels, and it can be flexibly set according to the actual situation. The embodiments of the present application do not limit this.

[0135] In this way, after obtaining the flicker degree of the display panel, the flicker degree of the display panel can be used to determine whether it is qualified, so as to facilitate the detection of good products of the display panel and subsequent repair, and ensure that the display panel after leaving the factory has a good display effect.

[0136] Continue to refer to Figure 8 According to some embodiments of the present application, optionally, the method for detecting the flicker degree of the display panel may further include the following steps:

[0137] S804. When the flicker degree is greater than a preset flicker degree threshold, readjust the data voltage values corresponding to the sub-pixels of at least one color in the display panel, and return to the step of comparing the flicker degree with the preset flicker degree threshold until the flicker degree of the display panel is less than or equal to the preset flicker degree threshold.

[0138] For example, the display panel may include, for example, red sub-pixels, green sub-pixels, and blue sub-pixels. When the flicker degree of the display panel is greater than the preset flicker degree threshold, the data voltage values corresponding to the sub-pixels of at least one color among the red sub-pixels, green sub-pixels, and blue sub-pixels of the display panel can be readjusted, such as re-performing gamma debugging and / or re-burning the data voltage values corresponding to the red sub-pixels, green sub-pixels, and blue sub-pixels respectively, so that the flicker degree of the display panel is less than or equal to the preset flicker degree threshold.

[0139] In this way, by repairing the display panel with unqualified flicker degree, the yield rate of the display panel can be improved, and it is ensured that the display panel after leaving the factory has a good display effect.

[0140] For the sake of easy understanding, the method for detecting the flicker degree of the display panel provided by the embodiments of the present application will be described below in conjunction with some specific application embodiments.

[0141] Figure 9 is an operation schematic diagram of the method for detecting the flicker degree of the display panel provided by the embodiments of the present application. As Figure 9 shown, in some embodiments, optionally, the method for detecting the flicker degree of the display panel provided by the embodiments of the present application may specifically include the following steps:

[0142] Step 1: Build a test platform. Specifically, the display panel 901 is placed flat on the carrier 902, and the probe of the optical measurement device 903 can be placed at the exact center of the display panel 901. The optical measurement device 903 can be electrically connected to the controller 905, and the controller 905 is used to control the optical measurement device 903 and data analysis. The lighting device 904 can be used to control the operation and display of the display panel 901. For example, it can provide a target grayscale image to the display panel 901 and can also control the display panel 901 to display the target grayscale image at different refresh rates.

[0143] Step 2: Set the sampling interval or sampling frequency of the optical measurement device 903. For example, the sampling interval can be set to 37 ms, and the sampling frequency of the set brightness can be 24 brightness values per second.

[0144] Step 3: Set the number of sampling times of the optical measurement device 903. For example, the number of sampling times is set to 300 times, and the duration of the target time period T3 is approximately 12.5 seconds.

[0145] Step 4: Light up the display panel 901. For example, first, the lighting device 904 can be used to control the refresh rate of the display panel 901 to a high refresh rate, such as 120 Hz, so that the display panel 901 displays the target grayscale image at a high refresh rate. The optical measurement device 903 starts to collect the brightness values of the display panel 901. Then, the lighting device 904 is used to control the refresh rate of the display panel 901 to switch to a low refresh rate, such as 1 Hz. At this time, after the optical measurement device 903 finishes collecting, brightness values at multiple moments are obtained.

[0146] Step 5: Calculate the brightness change rates at multiple first moments in the first time period, and calculate the brightness change rates at multiple second moments in the second time period. For the specific calculation process, refer to the above text.

[0147] It should be noted that, for example, it can be set that when the optical measurement device 903 collects the brightness value at the x-th moment, the lighting device 904 controls the display panel 901 to switch the refresh rate, so as to facilitate determining the brightness value corresponding to the starting moment of the first time period from the brightness values at 300 moments, and then further determining the brightness values at multiple moments in the first time period and the brightness values at multiple moments in the second time period, where x is an integer.

[0148] Step 6: Calculate the brightness change rate of the display panel in the first time period based on the brightness change rates at multiple first moments in the first time period; calculate the brightness change rate of the display panel in the second time period based on the brightness change rates at multiple second moments in the second time period.

[0149] Step 7: Determine the flicker degree of the display panel based on the brightness change rate of the display panel in the first time period and the brightness change rate in the second time period.

[0150] Step Eight: When the flicker degree is less than or equal to the preset flicker degree threshold, it is determined that the flicker degree of the display panel is qualified; when the flicker degree is greater than the preset flicker degree threshold, it is determined that the flicker degree of the display panel is unqualified.

[0151] Step Nine: When the flicker degree is greater than the preset flicker degree threshold, readjust the data voltage values corresponding to the sub-pixels of at least one color in the display panel, and return to the step of comparing the flicker degree with the preset flicker degree threshold until the flicker degree of the display panel is less than or equal to the preset flicker degree threshold.

[0152] Based on the display panel flicker degree detection method provided in the above embodiments, correspondingly, the embodiments of the present application also provide a display panel flicker degree detection device. The display panel flicker degree detection device can be used to execute the display panel flicker degree detection method provided in the above embodiments.

[0153] As Figure 9 shown, the display panel flicker degree detection device 90 may include an optical measurement device 903, a lighting device 904, and a controller 905. The lighting device 904 can be used to provide a target gray-scale image to the display panel 901. The optical measurement device 903 can be used to obtain the brightness values of the display panel 901 at multiple first moments in the first time period and the brightness values at multiple second moments in the second time period. The controller 905 is electrically connected to the optical measurement device 903. The controller 905 can be used to determine the brightness change rate of the display panel in the first time period and the brightness change rate in the second time period according to the brightness values of the display panel at multiple first moments in the first time period and the brightness values at multiple second moments in the second time period; and determine the flicker degree of the display panel according to the brightness change rate of the display panel in the first time period and the brightness change rate in the second time period.

[0154] In some embodiments, optionally, the optical measurement device 903 includes but is not limited to a colorimeter or a color analyzer. The lighting device 904 includes but is not limited to a lighting machine. The controller 905 includes but is not limited to a computer.

[0155] In some embodiments, optionally, the controller 905 can also execute Figures 2 to 8 each step in

[0156] The specific functions and implementation processes of the above components have been described in detail above. For the sake of brevity, they will not be elaborated here.

[0157] The flicker degree detection device of the display panel according to the embodiment of the present application uses brightness as the test object and evaluation basis for the severity of the flicker phenomenon, takes the brightness change rate in the first time period during the refresh rate switching process as the main body, and takes the brightness change rate in the brightness stable stage (i.e., the second time period) before or after the refresh rate switching as the reference to obtain the flicker degree for characterizing the severity of the flicker phenomenon. It fully considers the brightness change and can quantitatively and accurately determine the severity of the flicker phenomenon of the display panel, thereby providing a reference for the test and subsequent repair of the display panel.

[0158] Based on the flicker degree detection method of the display panel provided in the above embodiment, correspondingly, the present application also provides a specific implementation manner of the electronic device. Please refer to the following embodiments.

[0159] Figure 10 It is a schematic diagram of the hardware structure of the electronic device provided in the embodiment of the present application.

[0160] The electronic device may include a processor 1001 and a memory 1002 storing computer program instructions.

[0161] Specifically, the above-mentioned processor 1001 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0162] The memory 1002 may include a mass storage for data or instructions. By way of example and not limitation, the memory 1002 may include a Hard Disk Drive (HDD), a floppy disk drive, a flash memory, an optical disc, a magneto-optical disc, a magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. In one example, the memory 1002 may include a removable or non-removable (or fixed) medium, or the memory 1002 is a non-volatile solid-state memory. The memory 1002 may be inside or outside the electronic device.

[0163] In one example, the memory 1002 may be a Read Only Memory (ROM). In one example, the ROM may be a mask-programmed ROM, a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), an Electrically Rewritable ROM (EAROM), or a flash memory, or a combination of two or more of these.

[0164] The memory 1002 may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage media device, an optical storage media device, a flash memory device, an electrical, optical, or other physical / tangible memory storage device. Thus, generally, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to an aspect of the present application.

[0165] The processor 1001 reads and executes the computer program instructions stored in the memory 1002 to implement Figure 2 the methods / steps S101 to S102 in the illustrated embodiment, and achieves Figure 2 the corresponding technical effects achieved by the illustrated example in executing its methods / steps. For the sake of brevity, the description is not repeated here.

[0166] In one example, the electronic device may further include a communication interface 1003 and a bus 1010. Among them, as Figure 10 shown, the processor 1001, the memory 1002, and the communication interface 1003 are connected through the bus 1010 and complete communication with each other.

[0167] The communication interface 1003 is mainly used to implement communication between each module, device, unit, and / or device in the embodiments of the present application.

[0168] The bus 1010 includes hardware, software, or both, and couples the components of the electronic device to each other. By way of example and not limitation, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses or a combination of two or more of these. In a suitable case, the bus 1010 may include one or more buses. Although the embodiments of the present application describe and illustrate a specific bus, the present application contemplates any suitable bus or interconnect.

[0169] In addition, in combination with the method for detecting the flicker degree of the display panel in the above embodiments, an embodiment of the present application can provide a computer-readable storage medium to implement. Computer program instructions are stored on the computer-readable storage medium; when the computer program instructions are executed by a processor, any one of the methods for detecting the flicker degree of the display panel in the above embodiments is implemented. Examples of the computer-readable storage medium include non-transitory computer-readable storage media, such as electronic circuits, semiconductor memory devices, ROMs, random access memories, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical discs, and hard disks.

[0170] It should be clear that the present application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications, and additions, or change the order between steps after understanding the spirit of the present application.

[0171] It should also be noted that the functional blocks shown in the above structural block diagrams can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a functional card, etc. When implemented in software, the elements of the present application are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium or transmitted via a data signal carried in a carrier wave on a transmission medium or a communication link. A "machine-readable medium" can include any medium capable of storing or transmitting information. Examples of the machine-readable medium include electronic circuits, semiconductor memory devices, ROMs, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical discs, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet or an intranet.

[0172] It also needs to be noted that the exemplary embodiments mentioned in the present application describe some methods or devices based on a series of steps or devices. However, the present application is not limited to the order of the above steps, that is, the steps can be executed in the order mentioned in the embodiments, or different from the order in the embodiments, or several steps can be executed simultaneously.

[0173] As described above with reference to the flowcharts and / or block diagrams of methods, apparatuses, and computer program products according to embodiments of the present application. It should be understood that each block in the flowchart and / or block diagram, and the combinations of blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the functions / actions specified in one or more blocks of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It should also be understood that each block in the block diagram and / or flowchart, and the combinations of blocks in the block diagram and / or flowchart, can also be implemented by dedicated hardware that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0174] As described above, the foregoing is only a specific implementation manner of the present application. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the apparatuses, modules, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein. It should be understood that the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present application, and these modifications or substitutions should all be covered within the protection scope of the present application.

Claims

1. A method for detecting the flicker degree of a display panel, characterized in that Including: Obtaining a brightness change rate of the display panel in a first time period and a brightness change rate in a second time period, where the first time period is at least a partial time period during the switching process of the display panel from a first refresh rate to a second refresh rate, and the second time period is a time period before the switching process or a time period after the switching process; Determining a flicker degree of the display panel according to the brightness change rate of the display panel in the first time period and the brightness change rate in the second time period; The obtaining the brightness change rate of the display panel in the first time period and the brightness change rate in the second time period specifically includes: Obtaining brightness values of the display panel at a plurality of first moments in the first time period and brightness values at a plurality of second moments in the second time period; Determining a brightness change rate corresponding to the i-th first moment according to the brightness value at the (i - 1)-th first moment and the brightness value at the i-th first moment, where i is an integer greater than 1; Determining a brightness change rate corresponding to the j-th second moment according to the brightness value at the (j - 1)-th second moment and the brightness value at the j-th second moment, where j is an integer greater than 1; Determining the brightness change rate of the display panel in the first time period according to the brightness change rates corresponding to the plurality of first moments in the first time period; Determining the brightness change rate of the display panel in the second time period according to the brightness change rates corresponding to the plurality of second moments in the second time period.

2. The method according to claim 1, characterized in that, Determining the brightness change rate corresponding to the i-th first moment according to the following expression: ΔL1i = |(L1i - L1i-1) / L1i-1 * 100%|; where ΔL1i represents the brightness change rate corresponding to the i-th first moment, L1i represents the brightness value at the i-th first moment, and L1i-1 represents the brightness value at the (i - 1)-th first moment.

3. The method according to claim 1, characterized in that Determining the brightness change rate corresponding to the j-th second moment according to the following expression: ΔL2j = |(L2j - L2j-1) / L2j-1 * 100%|; where ΔL2j represents the brightness change rate corresponding to the j-th second moment, L2j represents the brightness value at the j-th second moment, and L2j-1 represents the brightness value at the (j - 1)-th second moment.

4. The method according to claim 1, characterized in that The determining the brightness change rate of the display panel in the first time period according to the brightness change rates corresponding to the plurality of first moments in the first time period specifically includes: Calculating an average value or a maximum value of the brightness change rates corresponding to the plurality of first moments in the first time period to obtain the brightness change rate of the display panel in the first time period; The determining the brightness change rate of the display panel in the second time period according to the brightness change rates corresponding to the plurality of second moments in the second time period specifically includes: Calculating an average value or a maximum value of the brightness change rates corresponding to the plurality of second moments in the second time period to obtain the brightness change rate of the display panel in the second time period.

5. The method according to claim 1, characterized in that, Before obtaining the brightness values of the display panel at multiple first moments in the first time period and the brightness values of the display panel at multiple second moments in the second time period, the method further includes: Setting a sampling interval or sampling frequency of brightness according to the persistence of vision time; The obtaining of the brightness values of the display panel at multiple first moments in the first time period and the brightness values of the display panel at multiple second moments in the second time period specifically includes: Obtaining the brightness values of the display panel at multiple first moments in the first time period and the brightness values of the display panel at multiple second moments in the second time period according to the sampling interval or the sampling frequency.

6. The method according to claim 5, wherein The obtaining of the brightness values of the display panel at multiple first moments in the first time period and the brightness values of the display panel at multiple second moments in the second time period according to the sampling interval or the sampling frequency specifically includes: Setting the number of sampling times of brightness; Obtaining the brightness values of the display panel at multiple moments in the target time period according to any one of the sampling interval and the sampling frequency and the number of sampling times, where the target time period includes the first time period and the second time period; In the target time period, controlling the display panel to first display a target gray-scale image at the first refresh rate, and then switching from the first refresh rate to the second refresh rate to display the target gray-scale image until the display panel displays the target gray-scale image at the second refresh rate.

7. The method according to claim 6, wherein The second time period is adjacent to the first time period.

8. The method according to claim 6, wherein The second time period is the time period before the switching process.

9. The method according to claim 6, wherein The duration of the second time period is the same as the duration of the first time period.

10. The method according to claim 1, characterized in that The determining of the flicker degree of the display panel according to the brightness change rate of the display panel in the first time period and the brightness change rate of the display panel in the second time period specifically includes: Calculating the difference between the brightness change rate of the display panel in the first time period and the brightness change rate of the display panel in the second time period, and taking the difference as the flicker degree of the display panel.

11. The method according to claim 1, characterized in that, After determining the flicker degree of the display panel, the method further includes: Comparing the size relationship between the flicker degree and a preset flicker degree threshold; When the flicker degree is less than or equal to the preset flicker degree threshold, determining that the flicker degree of the display panel is qualified; When the flicker degree is greater than the preset flicker degree threshold, determining that the flicker degree of the display panel is unqualified.

12. The method according to claim 11, wherein The method further includes: When the flicker degree is greater than the preset flicker degree threshold, readjusting the data voltage values corresponding to the sub-pixels of at least one color in the display panel, and returning to the step of comparing the size relationship between the flicker degree and the preset flicker degree threshold until the flicker degree of the display panel is less than or equal to the preset flicker degree threshold.

13. A flicker detection device for a display panel, characterized in that, The device is used to execute the flicker degree detection method of the display panel according to any one of claims 1-12, and the device includes: A lighting device for providing a target gray-scale image to the display panel; An optical measurement device for obtaining the brightness values of the display panel at a plurality of first moments in the first time period and the brightness values at a plurality of second moments in the second time period; A controller, electrically connected to the optical measurement device, is configured to determine a brightness change rate of the display panel in the first time period and a brightness change rate of the display panel in the second time period according to brightness values of the display panel at a plurality of first moments in the first time period and brightness values of the display panel at a plurality of second moments in the second time period; and determine a flicker degree of the display panel according to the brightness change rate of the display panel in the first time period and the brightness change rate of the display panel in the second time period ； The controller is configured to determine the brightness change rate of the display panel in the first time period and the brightness change rate in the second time period, and specifically can be used for: Obtaining the brightness values of the display panel at a plurality of first moments in the first time period and the brightness values at a plurality of second moments in the second time period; Determining the brightness change rate corresponding to the i-th first moment according to the brightness value of the (i - 1)-th first moment and the brightness value of the i-th first moment, where i is an integer greater than 1; Determining the brightness change rate corresponding to the j-th second moment according to the brightness value of the (j - 1)-th second moment and the brightness value of the j-th second moment, where j is an integer greater than 1; Determining the brightness change rate of the display panel in the first time period according to the brightness change rates corresponding to a plurality of the first moments in the first time period; Determining the brightness change rate of the display panel in the second time period according to the brightness change rates corresponding to a plurality of the second moments in the second time period.

14. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method for detecting the flicker degree of the display panel according to any one of claims 1 to 12 are implemented.

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