Test method, device and apparatus for display device

Abstract

The application discloses a display device testing method, device and equipment. The display device comprises a display screen, and the display device comprises a display area, the display area comprises a planar area and a curved area surrounding the planar area, the planar area comprises at least one first corner, the curved area comprises at least one second corner area, the second corner area and the first corner are one-to-one corresponding, and the second corner area is adjacent to the corresponding first corner. The display device testing method comprises the following steps: determining a first main wavelength of a wrinkle of the display screen of the second corner area; determining a stress borne by the display screen of the second corner area; determining a wrinkle coefficient of the display screen of the second corner area according to the first main wavelength and the stress, the wrinkle coefficient being a numerical value representing a wrinkle degree of the display screen of the second corner area; and determining whether the display device is qualified according to the wrinkle coefficient. The technical scheme of the embodiment of the application realizes the testing of the wrinkle of the display device, and ensures that the display effect of the display device is good.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display device testing method, device and equipment. BACKGROUND

[0002] With the development of display technology, flexible display panels can realize multi-edge bending to form multi-curved products, such as four-edge bending to form four-curved products.

[0003] However, in the four-curved product, the bending directions of the two adjacent curved edges are different, and a wrinkle phenomenon will occur at the junction of the two adjacent curved edges. When the wrinkle is large, it will cause poor display effect of the display device. SUMMARY

[0004] The present application provides a display device testing method, device and equipment to test the wrinkles of the display device and screen out the display device with large wrinkles, so that the display device with small wrinkles is shipped, and the display effect of the shipped display device is better.

[0005] According to an aspect of the present application, a display device testing method is provided, the display device comprising a display screen, the display device comprising a display area, the display area comprising a planar area and a curved area surrounding the planar area, the planar area comprising at least one first corner, the curved area comprising at least one second corner area, the second corner area corresponding to the first corner one by one, and the second corner area being adjacent to the corresponding first corner;

[0006] The display device testing method comprises:

[0007] determining a first main wavelength of the wrinkles of the display screen of the second corner area;

[0008] determining the stress received by the display screen of the second corner area;

[0009] determining a wrinkle coefficient of the display screen of the second corner area according to the first main wavelength and the stress, the wrinkle coefficient being a numerical value representing the degree of wrinkles of the display screen of the second corner area;

[0010] determining whether the display device is qualified according to the wrinkle coefficient.

[0011] Optionally,

[0012] The display device further comprises at least one functional film layer stacked with the display screen;

[0013] The determination of the first main wavelength of the wrinkles of the display screen of the second corner area comprises:

[0014] determining the first main wavelength according to an elastic modulus and a thickness of at least one of the functional film layers and an elastic modulus and a thickness of the display screen;

[0015] Optionally, the functional film layers comprise at least one of a support layer and a polarizer.

[0016] Optionally, determining a wrinkle coefficient of the display screen in the second corner area according to the first main wavelength and the stress comprises:

[0017] determining the wrinkle coefficient according to a longitudinal stress of the display screen in the second corner area and the first main wavelength, wherein a direction of the longitudinal stress is perpendicular to the display screen;

[0018] Optionally, determining a wrinkle coefficient of the display screen in the second corner area according to the first main wavelength and the stress comprises:

[0019] multiplying the first main wavelength by the longitudinal stress as the wrinkle coefficient;

[0020] or taking a quotient of the first main wavelength and the longitudinal stress as the wrinkle coefficient;

[0021] or taking a quotient of the longitudinal stress and the first main wavelength as the wrinkle coefficient.

[0022] Optionally, the display device further comprises a cover plate located on a light-out side of the display screen.

[0023] determining the stress of the display screen in the second corner area comprises:

[0024] obtaining a resultant stress of the display screen in the second corner area and an edge arc length of the second corner area, the resultant stress being a resultant force of all stresses of the display screen in the second corner area, and the edge arc length being an arc length of an edge of the display screen in the second corner area away from the planar area;

[0025] determining a longitudinal stress of the display screen in the second corner area according to the resultant stress, the edge arc length and the first main wavelength.

[0026] Optionally, determining whether the display device is qualified according to the wrinkle coefficient comprises:

[0027] determining whether the display device is qualified according to a difference value between the wrinkle coefficient and a standard wrinkle coefficient.

[0028] Optionally, before determining whether the display device is qualified according to the difference value between the wrinkle coefficient and a standard wrinkle coefficient, the method further comprises:

[0029] determine a redundancy of the display screen of the second corner area according to a surface area and a projection area of the display screen of the second corner area, wherein the projection area is an area of a vertical projection of the display screen of the second corner area on a plane parallel to the plane area, and the redundancy represents a bending degree of the display screen at the second corner area;

[0030] obtain the standard wrinkle coefficient corresponding to the redundancy of the display screen of the second corner area according to a preset corresponding relationship between the redundancy and the wrinkle coefficient, wherein different redundancies correspond to different wrinkle coefficients in the corresponding relationship.

[0031] Optionally, before determining whether the display device is qualified according to the difference between the wrinkle coefficient and the standard wrinkle coefficient, the method further comprises:

[0032] obtain wrinkle coefficients of a plurality of standard display devices with different redundancies, wherein the standard display devices are display devices with wrinkle conforming to a set specification in a curved corner area;

[0033] establish the corresponding relationship between the wrinkle coefficients and the redundancies of the standard display devices.

[0034] Optionally, the first main wavelength is calculated by a main wavelength calculation formula.

[0035] The method for testing a display device further comprises:

[0036] perform finite element simulation analysis on the display device to obtain a wrinkle waveform diagram of the display screen of the second corner area, and determine a second main wavelength of the wrinkle of the display screen of the second corner area according to the wrinkle waveform diagram.

[0037] compare the difference between the second main wavelength and the first main wavelength to verify whether the main wavelength calculation formula is correct.

[0038] According to another aspect of the present application, a testing device for a display device is provided, wherein the display device comprises a display screen, and the display device comprises a display area, the display area comprising a plane area and a curved area surrounding the plane area, the plane area comprising at least one first corner, and the curved area comprising at least one second corner area, the second corner area and the first corner corresponding one by one, and the second corner area being adjacent to the corresponding first corner.

[0039] The display device testing device comprises:

[0040] a main wavelength determination module, configured to determine a first main wavelength of the wrinkle of the display screen of the second corner area.

[0041] a stress determining module configured to determine a stress of the display screen in the second corner area;

[0042] a determining module configured to determine a wrinkle coefficient of the display screen in the second corner area according to the first main wavelength and the stress, the wrinkle coefficient being a numerical value representing a degree of wrinkle of the display screen in the second corner area, and determine whether the display device is qualified according to the wrinkle coefficient.

[0043] According to another aspect of the present application, there is provided a testing device for a display device, comprising a processor, a memory, and a program or instructions stored in the memory and executable on the processor, the program or instructions being executed by the processor to implement the steps of the testing method for the display device according to any of the embodiments of the present application.

[0044] The technical solution of the embodiments of the present application determines the first main wavelength of the wrinkle of the display screen in the second corner area, determines the stress of the display screen in the second corner area, determines the wrinkle coefficient of the display screen in the second corner area according to the stress of the display screen in the second corner area and the first main wavelength, and determines the degree of wrinkle of the display screen in the second corner area according to the wrinkle coefficient, i.e., determines whether the display device is qualified according to the wrinkle coefficient. Since the greater the first main wavelength, the smaller the amplitude of the wrinkle, and the smaller the wrinkle; the smaller the first main wavelength, the greater the amplitude of the wrinkle, and the greater the wrinkle; the greater the stress, the greater the wrinkle; and the smaller the stress, the smaller the wrinkle, the wrinkle coefficient determined according to the first main wavelength and the stress can more accurately reflect the degree of wrinkle of the second corner area, so as to more accurately determine whether the display device is qualified. The technical solution of the embodiments of the present application can evaluate the degree of wrinkle according to the wrinkle coefficient, and screen out display devices with greater wrinkle, so that the display devices to be shipped have smaller wrinkle and better display effect.

[0045] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0047] Figure 1 is a flowchart of a testing method for a display device provided by the embodiments of the present application;

[0048] Figure 2is a structural schematic diagram of a display device provided by an embodiment of the present application;

[0049] Figure 3 is a structural schematic diagram of a display device provided by an embodiment of the present application;

[0050] Figure 4 is a schematic diagram of a fold of a display screen of a second corner area provided by an embodiment of the present application;

[0051] Figure 5 is a schematic diagram of a fold of a display screen of a second corner area provided by an embodiment of the present application;

[0052] Figure 6 is a flow chart of a test method of a display device provided by an embodiment of the present application;

[0053] Figure 7 is a flow chart of a test method of a display device provided by an embodiment of the present application;

[0054] Figure 8 is a schematic diagram of a standard fold coefficient and a fold coefficient corresponding to different redundancy amounts provided by an embodiment of the present application;

[0055] Figure 9 is a schematic diagram of a standard fold coefficient and a fold coefficient corresponding to different redundancy amounts provided by an embodiment of the present application;

[0056] Figure 10 is a structural schematic diagram of a test device of a display device provided by an embodiment of the present application;

[0057] Figure 11 is a structural schematic diagram of a test device of a display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0058] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely 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 of the present application. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative labor should fall within the protection scope of the present application.

[0059] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting, unless the context clearly indicates otherwise. It will be further understood that the use of relational terms such as first and second, and the like are used solely to distinguish one from another entity without necessarily implying a relationship or order between such entities. Much of the detail of the embodiments described in this detailed description is intended to be illustrative and not restrictive. It is contemplated that the scope of the application is not limited to the embodiments described herein but extends into any and all embodiments that would use, or adapt to, the teachings provided herein.

[0060] Figure 1 is a flow chart of a test method of a display device provided by an embodiment of the present application, the embodiment provides a test method of a display device, which can be executed by a test device of the display device. Figure 2 is a structural schematic diagram of a display device provided by an embodiment of the present application, referring to Figure 2 , the display device comprises a display screen 101, the display device comprises a display area, the display area comprises a planar area A1 and a curved area A2 surrounding the planar area, the planar area A1 comprises at least one first corner C1, the curved area A2 comprises at least one second corner area C2, the second corner area C2 and the first corner C1 correspond to each other, and the second corner area C2 is adjacent to the corresponding first corner C1.

[0061] The display screen 101 is, for example, a flexible display screen, and the display screen 101 comprises, for example, a pixel circuit layer and a light emitting device layer, the pixel circuit layer is used to form a pixel driving circuit, and the pixel circuit layer can comprise, for example, a plurality of metal layers and an insulating layer, and is used to form transistors, capacitors and connecting lines between different devices, so as to form the pixel driving circuit. The light emitting device layer is arranged on one side of the pixel circuit layer, and is used to form a light emitting device, and the light emitting device layer can comprise, for example, an anode layer, an organic layer and a cathode layer arranged in a stack, so that the display screen 101 can emit light. The display screen 101 can further comprise, for example, a thin film encapsulation layer, the thin film encapsulation layer is located on a side of the light emitting device layer away from the pixel circuit layer, and the thin film encapsulation layer can protect the pixel circuit layer and the light emitting device layer, so as to avoid corrosion of the pixel circuit layer and the light emitting device layer by water vapor and oxygen. The display screen 101 can further comprise, for example, a touch layer, the touch layer is located on a side of the thin film encapsulation layer away from the light emitting device layer, and the touch layer comprises a touch electrode, so as to detect a finger touch position, so that the display screen is configured as a touch screen.

[0062] The planar area A1 comprises at least one first corner C1, as shown in Figure 2 , for example, four first corners C1; the curved area A2 comprises at least one second corner area C2, as shown in Figure 2As shown, for example, the four second corner regions C2 are included. The first corner C1 is the intersection of two edges of the planar region A1, and the second corner region C2 is the adjacent region of the curved surface region A2 and the first corner C1, i.e., the second corner region C2 is the intersection of two sub-curved surface regions adjacent to the two edges of the curved surface region A2 intersecting with the planar region A1, respectively, and the two sub-curved surface regions are curved in two different directions, so that the display screen 101 of the second corner region C2 is prone to larger wrinkles; before the display device is shipped, the wrinkles of the display device need to be tested to verify whether the wrinkles of the display device are too large, i.e., whether the wrinkles of the display device meet the specifications; and in the display device, the wrinkles of the display screen 101 of the second corner region C2 are larger, so that by testing the wrinkles of the display screen 101 of the second corner region C2, whether the wrinkles of the display device are qualified can be verified.

[0063] In combination Figure 1 and Figure 2 , the test method of the display device comprises:

[0064] S110, determining a first main wavelength of the wrinkles of the display screen of the second corner region.

[0065] Specifically, according to the main wavelength theory: when the rock stratum is subjected to lateral pressure, various wavelengths of wrinkles are generated due to material instability, and the growth rates of these different wavelengths of wrinkles are inconsistent, wherein a certain initial wavelength develops best and the amplitude grows fastest, and finally controls the growth and development of the wrinkles, which is called the main wavelength; that is, the wrinkles corresponding to the main wavelength develop best and are easy to develop into larger wrinkles. The larger the main wavelength, the smaller the amplitude of the wrinkles, and the smaller the wrinkles; the smaller the main wavelength, the larger the amplitude of the wrinkles, and the larger the wrinkles.

[0066] Exemplarily, the first main wavelength of the wrinkles of the display screen 101 of the second corner region C2 can be calculated by the main wavelength theory, or can be determined by simulating and analyzing the display device; the first main wavelength of the wrinkles of the display screen 101 of the second corner region C2 can also be determined by other ways, and the present embodiment is not limited thereto.

[0067] S120, determining the stress received by the display screen of the second corner region.

[0068] Specifically, the display screen 101 is wrinkled, mainly because the display screen 101 is stressed, and the stress changes the morphology of the wrinkle, for example, when the stress is large, the amplitude of the wrinkle is large, so the wrinkle of the display screen 101 in the second corner area C2 needs to be analyzed to determine the stress of the display screen 101 in the second corner area C2. The stress of the display screen 101 in the second corner area C2 includes, for example, the force applied by other film layers in the display device to the display screen 101, and the force applied by the frame of the display device to the display screen 101. For example, the stress of the display screen 101 in the second corner area C2 can be determined by simulation analysis.

[0069] S130, determining a wrinkle coefficient of the display screen in the second corner area according to the first main wavelength and the stress, the wrinkle coefficient being a numerical value representing the degree of wrinkle of the display screen in the second corner area.

[0070] Specifically, the stress of the display screen 101 in the second corner area C2 and the first main wavelength of the wrinkle are the main influencing factors of the wrinkle morphology. When the stress of the display screen 101 in the second corner area C2 is unchanged, the larger the first main wavelength, the smaller the amplitude of the wrinkle, the smaller the wrinkle, the smaller the first main wavelength, the larger the amplitude of the wrinkle, and the larger the wrinkle. When the first main wavelength of the wrinkle of the display screen 101 in the second corner area C2 is unchanged, the greater the stress of the display screen 101 in the second corner area C2, the greater the wrinkle; the smaller the stress of the display screen 101 in the second corner area C2, the smaller the wrinkle. Therefore, the wrinkle coefficient of the display screen 101 in the second corner area C2 is determined according to the stress and the first main wavelength of the display screen 101 in the second corner area C2, and the degree of wrinkle of the display screen 101 in the second corner area C2 can be evaluated according to the wrinkle coefficient.

[0071] S140, determining whether the display device is qualified according to the wrinkle coefficient.

[0072] Specifically, the degree of wrinkle of the display screen 101 in the second corner area C2 can be determined according to the wrinkle coefficient, that is, whether the display device is qualified can be determined according to the wrinkle coefficient. For example, the standard wrinkle coefficient of the display screen 101 in the second corner area C2 is determined according to the qualified display device, and by comparing the wrinkle coefficient of the display screen 101 in the second corner area C2 obtained by testing with the corresponding standard wrinkle coefficient, it can be judged whether the display device is qualified. When it is determined that the display device is qualified according to the wrinkle coefficient, it is determined that the display device can be shipped, and the display effect of the shipped display device can be ensured to be good.

[0073] The technical solution of this embodiment determines the first dominant wavelength of the wrinkles in the display screen in the second corner area, and determines the stress on the display screen in the second corner area. Based on the stress on the display screen in the second corner area and the first dominant wavelength, the wrinkle coefficient of the display screen in the second corner area is determined. Based on the wrinkle coefficient, the degree of wrinkles in the display screen in the second corner area is determined, that is, whether the display device is qualified is determined based on the wrinkle coefficient. Since a larger first dominant wavelength results in a smaller wrinkle amplitude and a smaller wrinkle, and a smaller first dominant wavelength results in a larger wrinkle amplitude and a larger wrinkle, and greater stress results in a larger wrinkle, and less stress results in a smaller wrinkle, the wrinkle coefficient determined by the first dominant wavelength and stress can accurately reflect the degree of wrinkles in the second corner area, thereby accurately determining whether the display device is qualified. The technical solution of this embodiment can evaluate the degree of wrinkles based on the wrinkle coefficient, screen out display devices with larger wrinkles, and thus ensure that the display devices leaving the factory have smaller wrinkles and better display effects.

[0074] Figure 3 This is a schematic diagram of another display device provided in an embodiment of the present invention. Optionally, refer to... Figure 3 The display device further includes at least one functional film layer stacked with the display screen; optionally, the functional film layer includes at least one of the following: a support layer 102 and a polarizer 103.

[0075] Specifically, refer to Figure 3 The functional film layer includes a support layer 102 and a polarizer 103; the display screen 101 is located between the support layer 102 and the polarizer 103. The support layer 102 has a supporting and protective function, and can support and protect the display screen 101; the polarizer 103 can filter out ambient light reflected by metal lines and other components within the display screen 101, thus preventing ambient light from affecting the image display.

[0076] It should be noted that, Figure 3 The diagram only shows the case where the functional film layer includes the support layer 102 and the polarizer 103.

[0077] Based on the above technical solution, optionally, S110, determining the first dominant wavelength of the folds in the display screen in the second corner area includes:

[0078] The first dominant wavelength is determined based on the elastic modulus and thickness of at least one functional film layer, and the elastic modulus and thickness of the display screen.

[0079] For example, when the display device includes a functional film layer stacked with the display screen, the first dominant wavelength of the folds in the second corner region C2 of the display screen 101 can be calculated based on the first elastic modulus B0 and the first thickness T of the display screen 101, and the second elastic modulus B1 of the functional film layer; thus, the first dominant wavelength of the folds in the second corner region C2 of the display screen 101 can be obtained.

[0080] For example, when the functional film layer includes the support layer 102 and the polarizer 103, the first principal wavelength of the wrinkle of the display screen 101 in the second corner area C2 can be calculated according to the first elastic modulus B0 and the first thickness T of the display screen 101, the second elastic modulus B1 and the second thickness H1 of the polarizer 103, and the third elastic modulus B2 and the third thickness H2 of the support layer 102; and the first principal wavelength of the wrinkle of the display screen 101 in the second corner area C2 can be obtained

[0081] When analyzing the wrinkle of the display device, the elastic modulus and the thickness of the display screen and the functional film layer are comprehensively considered, so that the determined principal wavelength is more accurate. When the functional film layer includes the support layer and the polarizer, the first principal wavelength of the wrinkle of the display screen in the second corner area is directly determined according to the first elastic modulus and the first thickness of the display screen, the second elastic modulus and the second thickness of the polarizer, and the third elastic modulus and the third thickness of the support layer, and the upper and lower layers of the display screen are comprehensively considered, so that the determined principal wavelength is more accurate.

[0082] It should be noted that in addition to calculating the principal wavelength of the wrinkle by using the above-mentioned principal wavelength calculation formula, the first principal wavelength of the wrinkle of the display device in the second corner area can also be obtained by finite element simulation, and the way of determining the first principal wavelength of the wrinkle is not limited herein.

[0083] Optionally, in S130, the wrinkle coefficient of the display screen in the second corner area is determined according to the first principal wavelength and the stress, including:

[0084] The wrinkle coefficient is determined according to the longitudinal stress received by the display screen in the second corner area and the first principal wavelength, wherein the direction of the longitudinal stress is perpendicular to the display screen.

[0085] Specifically, the longitudinal stress is the stress received by the display screen 101 in the second corner area C2 and perpendicular to the display screen, the longitudinal stress is the main stress received by the display screen 101 in the second corner area C2, the longitudinal stress has a greater influence on the shape of the wrinkle of the display screen 101 in the second corner area C2, the greater the longitudinal stress, the greater the amplitude of the wrinkle, and the greater the wrinkle; the smaller the longitudinal stress, the smaller the amplitude of the wrinkle, and the smaller the wrinkle. Thus, the wrinkle coefficient determined according to the longitudinal stress and the first principal wavelength can better judge the wrinkle degree of the display screen 101 in the second corner area C2, and without analyzing other stresses, the analysis difficulty is reduced and the test efficiency of the display device is improved.

[0086] By determining the wrinkle coefficient of the display screen 101 of the second corner area C2 according to the longitudinal stress and the first main wavelength, the determined wrinkle coefficient can better reflect the wrinkle condition, and the determination process of the wrinkle coefficient can be further simplified, and the determination difficulty of the wrinkle coefficient is reduced.

[0087] Optionally, the wrinkle coefficient is determined according to the longitudinal stress and the first main wavelength of the display screen of the second corner area, comprising:

[0088] The product of the first main wavelength and the longitudinal stress is taken as the wrinkle coefficient;

[0089] Or, the quotient of the first main wavelength and the longitudinal stress is taken as the wrinkle coefficient;

[0090] Or, the quotient of the longitudinal stress and the first main wavelength is taken as the wrinkle coefficient.

[0091] Specifically, the product of the first main wavelength L and the longitudinal stress f can be taken as the wrinkle coefficient, and the wrinkle coefficient D=L*f; because the first main wavelength L is small, the unit of the first main wavelength L is microns, and the longitudinal stress f is large, the product of the first main wavelength L and the longitudinal stress f can be large, so that the wrinkle coefficient D will not be too small, and the wrinkle coefficient is convenient for analysis; and when the first main wavelength L is constant, the smaller the longitudinal stress f is, the smaller the wrinkle coefficient D is, and the smaller the wrinkle is; the larger the longitudinal stress f is, the larger the wrinkle coefficient D is, and the larger the wrinkle is. The longitudinal stress f is the main factor affecting the wrinkle coefficient, and by taking the product of the first main wavelength L and the longitudinal stress f as the wrinkle coefficient, the relationship between the wrinkle coefficient and the longitudinal stress f can be positively correlated, and the degree of wrinkle can be analyzed according to the wrinkle coefficient.

[0092] In addition, the quotient of the first main wavelength L and the longitudinal stress f can be taken as the wrinkle coefficient, and the wrinkle coefficient When the first main wavelength L of the wrinkle of the display screen 101 of the second corner area C2 is constant, the larger the longitudinal stress f is, the smaller the wrinkle coefficient D is, and the larger the corresponding wrinkle is; the smaller the longitudinal stress f is, the larger the wrinkle coefficient D is, and the smaller the corresponding wrinkle is. When the longitudinal stress f is constant, the larger the first main wavelength L is, the larger the wrinkle coefficient D is, and the smaller the corresponding wrinkle is; when the longitudinal stress f is constant, the smaller the first main wavelength L is, the smaller the wrinkle coefficient D is, and the larger the corresponding wrinkle is. Therefore, by taking the quotient of the first main wavelength L and the longitudinal stress f as the wrinkle coefficient D, the wrinkle coefficient D is inversely proportional to the wrinkle, the larger the wrinkle coefficient D is, the smaller the wrinkle is; the smaller the wrinkle coefficient is, the larger the wrinkle is; and it is convenient to judge whether the wrinkle is qualified according to the wrinkle coefficient D.

[0093] In addition, the quotient of the longitudinal stress f and the first main wavelength L can be taken as the wrinkle coefficient, and the wrinkle coefficient When the first main wavelength L of the fold of the display screen 101 of the second corner area C2 is unchanged, the greater the longitudinal stress f, the greater the fold coefficient D, and the greater the corresponding fold; the smaller the longitudinal stress f, the smaller the fold coefficient D, and the smaller the corresponding fold. When the longitudinal stress f is unchanged, the greater the first main wavelength L, the smaller the fold coefficient D, and the smaller the corresponding fold; when the longitudinal stress f is unchanged, the smaller the first main wavelength L, the greater the fold coefficient D, and the greater the corresponding fold. Therefore, by taking the quotient of the longitudinal stress f and the first main wavelength L as the fold coefficient, the fold coefficient D is proportional to the fold, the greater the fold coefficient, the greater the fold; the smaller the fold coefficient, the smaller the fold; it is convenient to judge whether the fold is qualified according to the fold coefficient D.

[0094] Optionally, with reference to Figure 2 and Figure 3 , the display device further comprises a cover plate 104, the cover plate 104 is located on the light-emitting side of the display screen 101.

[0095] Specifically, the cover plate 104 is, for example, a glass cover plate, the four edges of the cover plate 104 are curved, and when the display device is formed, by laminating the cover plate 104 with the display screen 101, the support layer 102 and the polarizing plate 103, the display screen 101, the support layer 102 and the polarizing plate 103 are flexible, and the cover plate 104 can apply pressure to the display screen 101, the support layer 102 and the polarizing plate 103, so that the four edges of the display screen 101, the support layer 102 and the polarizing plate 103 are curved. For example, the display screen 101 can be a planar structure when it is prepared, and after the display screen 101 is assembled with the cover plate 104, the display screen 101 is pressed by the cover plate 104 to form a planar area A1 and a curved area A2 around the planar area A1. During the lamination of the cover plate 104 and the display screen 101, the pressure of the cover plate 104 can cause the material structure of the display screen 101 to be unstable, resulting in a large fold of the display screen 101 of the second corner area C2.

[0096] On the basis of the above technical solutions, optionally, S120, determining the stress received by the display screen of the second corner area, comprises:

[0097] Step a1, obtaining the resultant stress received by the display screen of the second corner area and the edge arc length of the second corner area, the resultant stress being the resultant force of all stresses received by the display screen of the second corner area, and the edge arc length being the arc length of the edge of the display screen of the second corner area away from the planar area.

[0098] Specifically, according to the structure and parameters of the display device, the parameters of the display device, such as thickness and the like, are subjected to finite element simulation analysis, through simulation calculation, the resultant stress of the display screen 101 in the second corner area C2 can be obtained, that is, the resultant force of all stresses of the display screen 101 in the second corner area C2. And the wrinkle map of the display screen 101 in the second corner area C2 can be simulated, by extracting the edge curve of the wrinkle map, the waveform graph of the wrinkle can be obtained, Figure 4 is a wrinkle schematic diagram of the display screen of the second corner area provided by an embodiment of the present application, Figure 4 shows the wrinkle map of the display screen 101 of one of the second corner areas C2 of the display device, according to the wrinkle map, it can be seen that the wrinkle of the display screen 101 in the second corner area C2 is a symmetrical structure. By extracting the edge curve of the wrinkle map, the wrinkle waveform graph of the display screen 101 in the second corner area C2 can be obtained. Figure 5 is a wrinkle waveform graph of the display screen of the second corner area provided by an embodiment of the present application, as Figure 5 shown, the waveform in the waveform graph can represent the edge curve of the wrinkle, the horizontal axis x of the waveform graph is the horizontal coordinate of the edge curve of the wrinkle, the vertical axis h is the amplitude of the wrinkle, for example, in microns (um), the origin of the waveform graph is the coordinate corresponding to the starting point of the wrinkle, L1 in the waveform graph represents the main wavelength of the simulated wrinkle waveform graph, that is, L1 is the simulation main wavelength; according to the waveform graph, the horizontal coordinate x0 corresponding to the maximum wrinkle amplitude can be determined, so as to determine the horizontal distance between the starting point of the wrinkle and the point corresponding to the maximum wrinkle amplitude h0.

[0099] According to Figure 5 the wrinkle waveform graph of the display screen 101 in the second corner area C2, it can be seen that the origin of the waveform graph is the coordinate corresponding to the starting point of the wrinkle, the wrinkle waveform graph is in a sine form, and stress is an important factor affecting the shape of the wrinkle, so the stress received by the display screen 101 in the second corner area C2 also conforms to the sine function, then the longitudinal stress received by the display screen 101 in the second corner area C2 can be determined as

[0100] In other embodiments, the wrinkle waveform graph can be in a cosine form, and stress is an important factor affecting the shape of the wrinkle, so the stress received by the display screen 101 in the second corner area C2 also conforms to the cosine function, then the longitudinal stress received by the display screen 101 in the second corner area C2 can be determined as

[0101] Since the folds are symmetrically distributed on the display screen 101 of the second corner area C2, and the starting point of the wave is the starting point of the second corner area C2, when forming the fold wave pattern, the curved edge of the display screen 101 of the second corner area C2 away from the flat area is stretched into a straight line as the x-axis, and the position corresponding to the maximum fold amplitude h0 is located at the midpoint of the wave of the entire fold wave pattern; therefore, when analyzing the longitudinal stress on the display screen 101 of the second corner area C2, the arc length of the edge of the second corner area C2 away from the flat area can be measured, and the arc length divided by 2 is the abscissa x0 corresponding to the maximum fold amplitude h0; thus, the abscissa x0 corresponding to the maximum fold amplitude h0 of the fold can be determined by measuring the arc length of the edge of the second corner area C2 away from the flat area.

[0102] Step a2, determining the longitudinal stress on the display screen of the second corner area according to the resultant stress, the edge arc length and the first main wavelength.

[0103] Specifically, the arc length of the edge divided by 2 can determine the abscissa x0 corresponding to the maximum fold amplitude h0 of the fold, and then according to the formula of the longitudinal stress Or The longitudinal stress on the display screen 101 of the second corner area C2 can be calculated without obtaining the fold wave pattern through complex simulation calculation, saving time.

[0104] Optionally, S140, determining whether the display device is qualified according to the fold coefficient, comprising:

[0105] Determining whether the display device is qualified according to the difference between the fold coefficient and the standard fold coefficient.

[0106] Specifically, the fold coefficient of the display screen 101 of the second corner area C2 obtained by testing is compared with the corresponding standard fold coefficient, for example, the difference between the fold coefficient and the standard fold coefficient is calculated, when the difference is greater than a preset difference, it indicates that the fold coefficient and the standard fold coefficient differ too much, and the display device is unqualified; when the calculated difference is less than or equal to the preset difference, it indicates that the fold coefficient is close to the standard fold coefficient, and the display device is qualified, thereby ensuring that the fold of the display device is not too large, and it is beneficial to ensure that the display effect of the display device is good.

[0107] It should be noted that the difference value can be the difference between the fold coefficient and the standard fold coefficient, or the quotient of the fold coefficient and the standard fold coefficient, or the difference value between the fold coefficient and the standard fold coefficient can be determined according to other ways. The standard fold coefficient can be the fold coefficient corresponding to the display device with fold conforming to the specification.

[0108] Optionally, the first main wavelength is calculated by a main wavelength calculation formula; in this case, the test method of the display device further comprises:

[0109] The display device is subjected to finite element simulation analysis to obtain a wrinkle waveform diagram of the display screen in the second corner area, and a second main wavelength of the wrinkle of the display screen in the second corner area is determined according to the wrinkle waveform diagram.

[0110] The difference between the second main wavelength and the first main wavelength is compared to verify whether the main wavelength calculation formula is correct.

[0111] Figure 6 is a flowchart of another display device test method provided by an embodiment of the present application, which can optionally refer to Figure 2 、 Figure 3 and Figure 6 The display device test method comprises the following steps.

[0112] S210, a first main wavelength is determined according to the elastic modulus and thickness of at least one functional film layer and the elastic modulus and thickness of the display screen. Specifically, the elastic modulus and thickness of the functional film layer and the elastic modulus and thickness of the display screen are substituted into the main wavelength calculation formula to obtain the first main wavelength.

[0113] S220, a resultant stress received by the display screen in the second corner area and an edge arc length of the second corner area are obtained, the resultant stress being the resultant force of all stresses received by the display screen in the second corner area, and the edge arc length being the arc length of the edge of the display screen in the second corner area away from the planar area.

[0114] S230, a longitudinal stress received by the display screen in the second corner area is determined according to the resultant stress, the edge arc length and the first main wavelength.

[0115] S240, the display device is subjected to finite element simulation analysis to obtain a wrinkle waveform diagram of the display screen in the second corner area, and a second main wavelength of the wrinkle of the display screen in the second corner area is determined according to the wrinkle waveform diagram.

[0116] Specifically, the display device is subjected to finite element simulation analysis according to the thickness, elastic modulus and Poisson's ratio of each film layer of the display device, and a wrinkle diagram of the display screen 101 in the second corner area C2 can be obtained. The edge curve of the wrinkle diagram can be extracted to obtain a wrinkle waveform diagram. As shown in Figure 5 According to the wrinkle waveform diagram of the display screen 101 in the second corner area C2, a simulation wavelength of the wrinkle of the display screen 101 in the second corner area C2 can be determined, and the simulation wavelength comprises a simulation main wavelength L1, which is a simulation main wavelength of the wrinkle, and the simulation main wavelength L1 is the second main wavelength described above.

[0117] S250, the difference between the second main wavelength and the first main wavelength is compared to verify whether the main wavelength calculation formula is correct.

[0118] Specifically, the second main wavelength L1 calculated by simulation is compared with the first main wavelength L calculated according to the formula, and when the difference between the first main wavelength L and the second main wavelength L1 is less than a preset difference value, it is indicated that the first main wavelength calculated by the formula is correct, and the correctness of the formula can be verified.

[0119] The second main wavelength is determined by finite element analysis, the calculation formula of the first main wavelength is verified by the second main wavelength, the accuracy of the first main wavelength calculation formula of the embodiment is ensured, and when the wrinkles of the display device are analyzed subsequently, the first main wavelength can be directly calculated according to the first main wavelength calculation formula, without complex finite element simulation analysis, so that the test process is simplified and the test time is shortened.

[0120] S260, determining a wrinkle coefficient according to the longitudinal stress received by the display screen of the second corner area and the first main wavelength, wherein the direction of the longitudinal stress is perpendicular to the display screen.

[0121] S270, determining whether the display device is qualified according to the difference value between the wrinkle coefficient and the standard wrinkle coefficient.

[0122] The technical scheme of the embodiment determines the second main wavelength by finite element analysis, verifies the calculation formula of the first main wavelength by the second main wavelength, ensures the accuracy of the first main wavelength calculation formula of the embodiment, so that when the wrinkles of the display device are analyzed subsequently, the first main wavelength can be directly calculated according to the first main wavelength calculation formula, without complex finite element simulation analysis, and the test time is shortened; and the difference value between the wrinkle coefficient and the standard wrinkle coefficient is determined, and whether the display device is qualified is judged according to the difference value, so that the test result of the display device is more accurate.

[0123] Optionally, before determining whether the display device is qualified according to the difference value between the wrinkle coefficient and the standard wrinkle coefficient, the method further comprises:

[0124] Step b1, determining the redundancy of the display screen of the second corner area according to the surface area and the projection area of the display screen of the second corner area; wherein the projection area is the area of the vertical projection of the display screen of the second corner area on a plane parallel to the flat area, and the redundancy represents the bending degree of the display screen at the second corner area.

[0125] Specifically, the redundancy reflects the bending degree of the display screen 101 at the second corner area C2, the greater the bending degree of the display screen 101 at the second corner area C2, the greater the difference between the surface area and the projection area at the second corner area C2, and the greater the redundancy. After the cover plate 104 is attached to the display screen 101, the redundancies of different display devices are different, and the redundancy of the display screen 101 of the second corner area C2 can be calculated by subtracting the surface area of the display screen 101 of the second corner area C2 from the projection area thereof.

[0126] In step b2, a standard crease coefficient corresponding to the redundancy of the display screen of the second corner area is obtained according to a preset correspondence between the redundancy and the crease coefficient, wherein different redundancies correspond to different crease coefficients in the correspondence.

[0127] Specifically, the preset correspondence between the redundancy and the crease coefficient is, for example, a relationship curve of different redundancies and different crease coefficients. The standard crease coefficients corresponding to different redundancies of the display device can be determined in advance. When the display device is tested, the standard crease coefficient corresponding to the redundancy can be directly found according to the redundancy after the redundancy of the display device is determined. Thus, the corresponding standard crease coefficient can be compared with the crease coefficient of the tested display device, and the accuracy of the test of the display device can be improved.

[0128] Optionally, before determining whether the display device is qualified according to the difference between the crease coefficient and the standard crease coefficient, the method further includes:

[0129] In step c1, the crease coefficients of a plurality of standard display devices with different redundancies are obtained, and the standard display device is a display device with a crease of the curved corner area meeting a set specification.

[0130] Specifically, the standard display device is a display device with a crease of the display screen 101 of the second corner area C2 meeting the specification. The redundancies of different display devices are different. The crease coefficients of a plurality of standard display devices with different redundancies can be calculated in advance to obtain a plurality of standard crease coefficients, so as to determine the standard crease coefficients corresponding to different redundancies.

[0131] In step c2, a correspondence between the crease coefficients of the standard display devices and the redundancies is established, and the correspondence is the preset correspondence between the redundancy and the crease coefficient.

[0132] Specifically, a correspondence curve of the crease coefficients of different standard display devices and different redundancies is drawn, so as to determine the correspondence between the crease coefficients of the standard display devices and the redundancies, that is, the correspondence between the standard crease coefficients and the redundancies. When the tested display device is tested, the standard crease coefficient of the standard display device corresponding to the redundancy of the tested display device can be found according to the correspondence between the crease coefficients of the standard display devices and the redundancies after the redundancy of the tested display device is determined. Thus, the crease coefficient of the standard display device is compared with the crease coefficient of the tested display device to verify whether the tested display device is qualified.

[0133] Figure 7 is a flowchart of another display device test method provided by the embodiment of the application. Optionally, the display device test method includes the steps of Figure 2 、 Figure 3 and Figure 7 the display device test method includes the steps of

[0134] S301, determining a first main wavelength according to the elastic modulus and thickness of the at least one functional film layer and the elastic modulus and thickness of the display screen.

[0135] S302, obtaining a resultant stress of the display screen in the second corner area and an edge arc length of the second corner area, the resultant stress being the resultant force of all stresses of the display screen in the second corner area, and the edge arc length being the arc length of the edge of the display screen in the second corner area away from the planar area.

[0136] S303, determining a longitudinal stress of the display screen in the second corner area according to the resultant stress, the edge arc length and the first main wavelength.

[0137] S304, performing finite element simulation analysis on the display device to obtain a wrinkle waveform diagram of the display screen in the second corner area, and determining a second main wavelength of the wrinkle of the display screen in the second corner area according to the wrinkle waveform diagram.

[0138] S305, comparing the difference between the second main wavelength and the first main wavelength to verify whether the main wavelength calculation formula is correct.

[0139] S306, determining a wrinkle coefficient according to the longitudinal stress of the display screen in the second corner area and the first main wavelength, wherein the direction of the longitudinal stress is perpendicular to the display screen.

[0140] S307, determining a redundancy of the display screen in the second corner area according to a surface area and a projection area of the display screen in the second corner area, wherein the projection area is the area of the vertical projection of the display screen in the second corner area on a plane parallel to the planar area, and the redundancy represents the bending degree of the display screen in the second corner area.

[0141] S308, obtaining a standard wrinkle coefficient corresponding to the redundancy of the display screen in the second corner area according to a preset corresponding relationship between the redundancy and the wrinkle coefficient, wherein different redundancies correspond to different wrinkle coefficients in the corresponding relationship.

[0142] S309, determining whether the display device is qualified according to the difference between the wrinkle coefficient and the standard wrinkle coefficient.

[0143] For example, the product of the main wavelength L and the longitudinal stress f can be taken as the wrinkle coefficient, that is, D=L*f; according to the calculation formula D=L*f of the wrinkle coefficient, the wrinkle coefficients of the display devices under different redundancies can be obtained, Figure 8 is a schematic diagram of the standard wrinkle coefficient corresponding to different redundancies and the wrinkle coefficient provided by the embodiment of the present application, as shown in Figure 8As shown, curve ① is a curve of standard wrinkle coefficients corresponding to different redundancies, and curve ② is a curve of wrinkle coefficients of the test display device corresponding to different redundancies; according to the curves, it can be seen that, under the same redundancy, the wrinkle coefficient of the test display device is smaller than the corresponding standard wrinkle coefficient, and the wrinkle coefficient corresponding to curve ② is too small, so the main wavelength of the wrinkle of the display screen 101 of the second corner area C2 of the display device is too small, and the amplitude of the wrinkle of the display screen 101 of the second corner area C2 will be larger, and the wrinkle is larger, so the display device corresponding to curve ② is unqualified.

[0144] For example, the quotient of the longitudinal stress f and the main wavelength L can be taken as the wrinkle coefficient, and the wrinkle coefficient is According to the calculation formula of the wrinkle coefficient The wrinkle coefficients of the display devices under different redundancies can be obtained, Figure 9 is another schematic diagram of standard wrinkle coefficients and wrinkle coefficients corresponding to different redundancies provided by the embodiment of the present application, and reference can be made to Figure 9 , curve ③ is a curve of standard wrinkle coefficients corresponding to different redundancies, and curve ④ is a curve of wrinkle coefficients of the test display device corresponding to different redundancies; according to the curves, it can be seen that, under the same redundancy, the wrinkle coefficient of the test display device is smaller than the corresponding standard wrinkle coefficient, and the wrinkle coefficient corresponding to curve ④ is smaller, so the wrinkle of the display screen 101 of the second corner area C2 of the display device is smaller, and the wrinkle of the display screen 101 of the second corner area C2 meets the specifications, so the display device corresponding to curve ④ is qualified.

[0145] The technical scheme of the embodiment determines the redundancy of the display screen of the second corner area according to the surface area and the projection area of the display screen of the second corner area, and before judging whether the wrinkle coefficient is qualified, the standard wrinkle coefficient corresponding to the display device is determined according to the redundancy, and then the difference between the wrinkle coefficient and the corresponding standard wrinkle coefficient is used to determine whether the display device is qualified, so that whether the wrinkle coefficient of different display devices is qualified is judged according to the standard wrinkle coefficients corresponding to different redundancies, and the testing accuracy is improved.

[0146] Figure 10 is a structural schematic diagram of a test device of a display device provided by the embodiment of the present application, and reference can be made to Figure 10 The test device of the display device comprises:

[0147] The main wavelength determination module 610 is configured to determine the first main wavelength of the wrinkle of the display screen of the second corner area.

[0148] The stress determination module 620 is configured to determine the stress received by the display screen of the second corner area.

[0149] The determining module 630 is configured to determine a wrinkle coefficient of the display screen in the second corner area according to the first main wavelength and the stress, the wrinkle coefficient being a numerical value representing a degree of wrinkle of the display screen in the second corner area, and determine whether the display device is qualified according to the wrinkle coefficient.

[0150] Optionally, the main wavelength determining module 610 is specifically configured to determine the first main wavelength according to the elastic modulus and the thickness of the at least one functional film layer, and the elastic modulus and the thickness of the display screen.

[0151] Optionally, the stress determining module 620 is specifically configured to obtain a resultant stress of the display screen in the second corner area and an edge arc length of the second corner area, the resultant stress being a resultant force of all stresses of the display screen in the second corner area, and the edge arc length being an arc length of an edge of the display screen in the second corner area away from the flat area, and determine a longitudinal stress of the display screen in the second corner area according to the resultant stress, the edge arc length and the first main wavelength.

[0152] Optionally, the determining module 630 comprises a wrinkle coefficient determining unit configured to determine the wrinkle coefficient according to the longitudinal stress of the display screen in the second corner area and the first main wavelength, wherein the longitudinal stress is perpendicular to the display screen.

[0153] Optionally, the wrinkle coefficient determining unit is specifically configured to take a product of the first main wavelength and the longitudinal stress as the wrinkle coefficient, or take a quotient of the first main wavelength and the longitudinal stress as the wrinkle coefficient, or take a quotient of the longitudinal stress and the first main wavelength as the wrinkle coefficient.

[0154] Optionally, the determining module 630 further comprises a determining unit configured to determine whether the display device is qualified according to a difference value between the wrinkle coefficient and a standard wrinkle coefficient.

[0155] Optionally, the test device further comprises:

[0156] The redundancy determining module is configured to determine a redundancy of the display screen in the second corner area according to a surface area and a projection area of the display screen in the second corner area, wherein the projection area is an area of a vertical projection of the display screen in the second corner area on a plane parallel to the flat area, and the redundancy represents a degree of bending of the display screen in the second corner area.

[0157] The standard wrinkle coefficient determining module is configured to obtain a standard wrinkle coefficient corresponding to the redundancy of the display screen in the second corner area according to a preset corresponding relationship between the redundancy and the wrinkle coefficient, wherein different redundancies correspond to different wrinkle coefficients in the corresponding relationship.

[0158] Optionally, the test device of the display device further comprises:

[0159] The standard wrinkle coefficient calculation module is configured to obtain wrinkle coefficients of a plurality of standard display devices with different redundancy amounts, wherein the standard display device is a display device with a curved corner region and a wrinkle that meets a set specification.

[0160] The corresponding relationship determination module is configured to establish a corresponding relationship between the wrinkle coefficient of the standard display device and the redundancy amount.

[0161] Optionally, the test device of the display device further comprises:

[0162] The second main wavelength determination module is configured to perform finite element simulation analysis on the display device to obtain a wrinkle waveform diagram of the display screen of the second corner region, and determine a second main wavelength of the wrinkle of the display screen of the second corner region according to the wrinkle waveform diagram.

[0163] The main wavelength verification module is configured to compare the difference between the second main wavelength and the first main wavelength to verify whether the main wavelength calculation formula is correct.

[0164] The test device of the display device provided by the embodiments of the present application can execute the test method of the display device provided by any of the embodiments of the present application, and has the corresponding function modules and beneficial effects of the execution method.

[0165] The technical solution of the embodiments of the present application further provides a test device of a display device, which comprises a processor, a memory, and a program or instruction stored in the memory and executable on the processor, and the program or instruction is executed by the processor to implement the steps of the test method of the display device according to any of the embodiments of the present application.

[0166] Figure 11 is a structural schematic diagram of a test device of a display device provided by the embodiments of the present application, Figure 11 The structure of the test device 10 that can be used to implement the embodiments of the present application is shown, and the test device is intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The test device can also represent various forms of mobile devices, such as personal digital processors, cellular telephones, smart phones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections, and relationships, and their functions, are merely examples and are not intended to limit the implementations of the present application described and / or claimed herein.

[0167] As Figure 11As shown, the testing device 10 includes at least one processor 11, and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., communicatively connected to the at least one processor 11, where the memory stores a computer program executable by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or loaded from the storage unit 18 into the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the testing device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0168] Various components in the testing device 10 are connected to the I / O interface 15, including an input unit 16, such as a keyboard, a mouse, etc., an output unit 17, such as various types of displays, a speaker, etc., a storage unit 18, such as a magnetic disk, an optical disk, etc., and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the testing device 10 to exchange information / data with other devices through a computer network, such as the Internet, and / or various telecommunication networks.

[0169] The processor 11 can be various general and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 performs various methods and processes described above, such as the testing method of the display device.

[0170] In some embodiments, the testing method of the display device can be implemented as a computer program tangibly embodied in a computer readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed onto the testing device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded onto the RAM 13 and executed by the processor 11, one or more steps of the methods XXX described above can be performed. Alternatively, in other embodiments, the processor 11 can be configured to perform the testing method of the display device by any other appropriate means, such as by means of firmware.

[0171] The various embodiments of the systems and techniques described above can be implemented in digital electronic circuitry, integrated circuitry, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a load programmable logic device (CPLD), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0172] Computer programs used to implement the processes of the application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer program

[0173] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store computer programs for use by or in connection with an instruction execution system, apparatus, or device. Computer-readable storage media can include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium will include one or more lines of electrical connections, portable computer disks, hard disk drives, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or Flash memory), optical fibers, portable compact disc read-only memories (CD-ROMs), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0174] To provide for interaction with a user, the systems and techniques described here can be implemented on a test device having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the test device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0175] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0176] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. A server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0177] It should be understood that the various forms of flow shown above can be re-ordered, added to, or deleted from without departing from the scope of the present disclosure. For example, the steps recited in the present disclosure can be executed in parallel, executed in sequence, or executed in a different order, as long as the desired results of the present disclosure are achieved, and the present disclosure is not limited herein.

[0178] The specific embodiments described above are not intended to be limiting, and persons skilled in the art will appreciate that various modifications, combinations, sub-combinations and alternatives can be made to the specific embodiments without departing from the spirit and principles of the disclosure. Accordingly, the disclosure is not limited to the specific embodiments described above, but only by the scope of the appended claims.

Claims

1. A testing method for a display device, characterized in that, The display device includes a display screen and a display area. The display area includes a planar area and a curved area surrounding the planar area. The planar area includes at least one first corner, and the curved area includes at least one second corner area. The second corner area corresponds one-to-one with the first corner, and the second corner area is adjacent to the corresponding first corner. The testing method for the display device includes: Determine the first dominant wavelength of the folds in the display screen in the second corner area; Determine the stress on the display screen in the second corner area; The wrinkle coefficient of the display screen in the second corner area is determined based on the first dominant wavelength and the stress, and the wrinkle coefficient is a value that characterizes the degree of wrinkling of the display screen in the second corner area; The qualification of the display device is determined based on the wrinkle coefficient. Determining the wrinkle coefficient of the display screen in the second corner region based on the first dominant wavelength and the stress includes: The wrinkle coefficient is determined based on the longitudinal stress on the display screen in the second corner area and the first dominant wavelength, wherein the direction of the longitudinal stress is perpendicular to the display screen; Determining the wrinkle coefficient based on the longitudinal stress on the display screen in the second corner area and the first dominant wavelength includes: The product of the first dominant wavelength and the longitudinal stress is used as the wrinkle coefficient; Alternatively, the quotient of the first dominant wavelength and the longitudinal stress can be used as the wrinkle coefficient; Alternatively, the quotient of the longitudinal stress and the first dominant wavelength can be used as the wrinkle coefficient.

2. The testing method for the display device according to claim 1, characterized in that, The display device further includes at least one functional film layer stacked with the display screen; The determination of the first dominant wavelength of the folds in the display screen in the second corner area includes: The first dominant wavelength is determined based on the elastic modulus and thickness of at least one of the functional films and the elastic modulus and thickness of the display screen.

3. The testing method for the display device according to claim 2, characterized in that, The functional film layer includes at least one of the following: a support layer and a polarizer.

4. The testing method for the display device according to claim 1, characterized in that, The display device further includes a cover plate located on the light-emitting side of the display screen; Determining the stress on the display screen in the second corner area includes: The resultant stress on the display screen in the second corner area and the edge arc length of the second corner area are obtained. The resultant stress is the resultant force of all stresses on the display screen in the second corner area, and the edge arc length is the arc length of the edge of the display screen in the second corner area away from the planar area. The longitudinal stress on the display screen in the second corner area is determined based on the combined stress, the edge arc length, and the first dominant wavelength.

5. The test method for the display device according to claim 1, characterized in that, The step of determining whether the display device is qualified based on the wrinkle coefficient includes: The quality of the display device is determined based on the difference between the wrinkle coefficient and the standard wrinkle coefficient.

6. The testing method for the display device according to claim 5, characterized in that, Before determining whether the display device is qualified based on the difference between the wrinkle coefficient and the standard wrinkle coefficient, the method further includes: The redundancy of the display screen in the second corner area is determined based on the surface area and projected area of ​​the display screen in the second corner area; wherein, the projected area is the area of ​​the display screen in the second corner area projected vertically onto a plane parallel to the planar area, and the redundancy represents the degree of curvature of the display screen at the second corner area; Based on the preset correspondence between redundancy and wrinkle coefficient, the standard wrinkle coefficient corresponding to the redundancy of the display screen in the second corner area is obtained, wherein different redundancy amounts correspond to different wrinkle coefficients in the correspondence.

7. The test method for the display device according to claim 6, characterized in that, Before determining whether the display device is qualified based on the difference between the wrinkle coefficient and the standard wrinkle coefficient, the method further includes: Obtain the wrinkle coefficients of multiple standard display devices with different redundancy levels. The standard display devices are display devices whose wrinkles in the curved corner areas conform to a set specification. Establish the correspondence between the wrinkle coefficient and redundancy of the standard display device.

8. The test method for the display device according to claim 1, characterized in that, The first dominant wavelength is calculated using the dominant wavelength calculation formula; The method further includes: Finite element simulation analysis was performed on the display device to obtain the wrinkle waveform diagram of the display screen in the second corner area, and the second main wavelength of the wrinkle of the display screen in the second corner area was determined based on the wrinkle waveform diagram. The degree of difference between the second dominant wavelength and the first dominant wavelength is compared to verify whether the dominant wavelength calculation formula is correct.

9. A testing device for a display device, characterized in that, The display device includes a display screen and a display area. The display area includes a planar area and a curved area surrounding the planar area. The planar area includes at least one first corner, and the curved area includes at least one second corner area. The second corner area corresponds one-to-one with the first corner, and the second corner area is adjacent to the corresponding first corner. The display device testing apparatus includes: A dominant wavelength determination module is used to determine the first dominant wavelength of the folds in the display screen in the second corner area; A stress determination module is used to determine the stress on the display screen in the second corner area; The determination module is used to determine the wrinkle coefficient of the display screen in the second corner area based on the first dominant wavelength and the stress, wherein the wrinkle coefficient is a value characterizing the degree of wrinkling of the display screen in the second corner area; and to determine whether the display device is qualified based on the wrinkle coefficient. The determining module includes a wrinkle coefficient determining unit, which is used to determine the wrinkle coefficient based on the longitudinal stress on the display screen in the second corner area and the first main wavelength, wherein the direction of the longitudinal stress is perpendicular to the display screen. The wrinkle coefficient determining unit is specifically used to take the product of the first dominant wavelength and the longitudinal stress as the wrinkle coefficient; or, take the quotient of the first dominant wavelength and the longitudinal stress as the wrinkle coefficient; or, take the quotient of the longitudinal stress and the first dominant wavelength as the wrinkle coefficient.

10. A testing device for a display device, characterized in that, The testing equipment includes: a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the testing method for the display device as described in any one of claims 1 to 8.

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