Display device and display screen crack detection method

Abstract

The application discloses a display device and a display screen crack detection method, and belongs to the technical field of display devices. The display device comprises a display screen, a crack detection element and a detection circuit structure. The detection circuit structure comprises a plurality of first resistance lines. The first resistance lines are arranged at intervals in the display screen. The crack detection element is connected with the first resistance lines. The crack detection element measures an equivalent impedance value of an electrode loop formed by the first resistance lines as a first measurement value. Whether the display screen has a crack is determined according to a corresponding relationship between the first measurement value and whether the first resistance lines are broken. The scheme can solve the problem that part of cracks in the display screen cannot be detected.

Description

Technical Field

[0001] This application belongs to the technical field of display devices, specifically relating to a display device and a method for detecting cracks in a display screen. Background Technology

[0002] With the development of AMOLED (Active Matrix Organic Light Emitting Diode) displays, AMOLED displays are being used in foldable, full-screen, and curved screen products.

[0003] While TFE (Tin Film Encapsulation) technology allows for further thinning of AMOLED flexible products, it also introduces the problem of black spots. Specifically, the edges and active area (AA) of the display can develop cracks in the TFE film layer due to external forces or pressure from foreign objects. External moisture and oxygen can then penetrate the product through these cracks, corroding the pixel areas and causing undesirable black spots in the displayed image. Because TFE film encapsulation has a three-layer structure—an inorganic layer, an organic layer, and an inorganic layer—cracks in the TFE film layer may not immediately manifest as black spots at some micro-crack locations. Furthermore, it is difficult to monitor and detect these micro-cracks during normal module and assembly processes, leading to the continued use of AMOLED displays with cracks in flexible AMOLED products. With the increasing use of flexible AMOLED products, the black spot problem in these cracked displays severely impacts consumer usability and visual experience. Summary of the Invention

[0004] The purpose of this application is to provide a display screen and a method for detecting cracks in the display screen, which can solve the problem that some cracks in the display screen cannot be detected.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] A display device includes a display screen, a crack detection element, and a detection circuit structure. The detection circuit structure includes a plurality of first resistance lines, which are spaced apart within the display screen. The crack detection element is connected to the first resistance lines. The crack detection element measures the equivalent impedance value of the electrode circuit formed by the first resistance lines as a first measured value. The presence of a crack in the display screen is determined based on the correspondence between the first measured value and whether the first resistance lines are broken.

[0007] A method for detecting cracks in a display screen, applicable to the aforementioned display device. The method for detecting cracks in a display screen includes:

[0008] The equivalent impedance value of the electrode circuit formed by the first resistance wire is measured as the first measured value;

[0009] Based on the correspondence between the first measured value and the breakage of the first resistance wire, it is determined whether the display screen has a crack.

[0010] The technical solution adopted in this invention can achieve the following beneficial effects:

[0011] In the display device disclosed in this invention, a detection circuit structure is provided within the display screen to detect whether there is a crack on the screen. Specifically, the first resistance wires in the detection circuit structure are spaced apart within the display screen. When a crack appears in the display screen, the first resistance wire at the crack breaks due to tension, causing a change in the equivalent impedance value of the electrode circuit formed by the first resistance wire. A crack detection element is connected to the first resistance wire and measures the equivalent impedance value of the electrode circuit formed by the first resistance wire as a first measured value. The first measured value is compared with the impedance value of the electrode circuit when the first resistance wire is not broken to determine whether the first resistance wire is broken, thereby determining whether there is a crack in the display screen. Furthermore, this display device can also be used to quickly detect whether there is a crack in the display screen.

[0012] The present invention discloses a method for detecting cracks in a display screen. This method uses a crack detection device to measure the equivalent impedance value of the electrode circuit formed by a first resistance wire as a first measured value. The magnitude of the first measured value is used to determine the correspondence between the first measured value and the breakage of the first resistance wire, thereby detecting whether a crack exists within the display screen. This solves the problem that some cracks in the display screen cannot be detected in the prior art. Furthermore, this crack detection method can quickly detect the presence of cracks in the display screen. Attached Figure Description

[0013] Figure 1 This is a first cross-sectional schematic diagram of a display screen disclosed in an embodiment of the present invention;

[0014] Figure 2 This is a second cross-sectional schematic diagram of a display screen disclosed in one embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram of the wiring of a monitoring line group disclosed in one embodiment of the present invention;

[0016] Figure 4 This is a simplified wiring diagram of the monitoring line group disclosed in one embodiment of the present invention;

[0017] Figure 5 This is a schematic diagram of the first monitoring line group disclosed in an embodiment of the present invention;

[0018] Figure 6This is a schematic diagram of the second monitoring line group disclosed in one embodiment of the present invention;

[0019] Figure 7 This is a simplified wiring diagram of a monitoring line group disclosed in one embodiment of the present invention.

[0020] In the picture:

[0021] 100 - Display screen;

[0022] 110 - TFE thin film encapsulation layer; 111 - First inorganic insulating layer; 112 - Organic planar insulating layer;

[0023] 113 - Second inorganic insulating layer; 114 - Lead wire through-hole; 120 - Light-emitting layer; 121 - Light-emitting body;

[0024] 200 - Detection circuit structure;

[0025] 210 - First circuit layer; 211 - First resistance wire; 212 - First electrode lead; 212a - First anode lead; 212b - First cathode lead; 220 - Second circuit layer; 221 - Second resistance wire; 222 - Second electrode lead; 222a - Second anode lead; 222b - Second cathode lead; 230 - First insulating layer;

[0026] 300 - Crack detection piece. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] The following is combined Figures 1 to 7 The display device provided in this application will be described in detail through specific embodiments and application scenarios.

[0030] Reference Figures 1 to 7 One embodiment of the display device discloses a display screen 100 and a detection circuit structure 200. The display screen 100 is a basic component, providing a mounting base for the detection circuit structure 200. Specifically, the detection circuit structure 200 includes a plurality of first resistance lines 211, which are spaced apart within the display screen 100. When the display screen 100 is subjected to force and breaks, the first resistance lines 211 at the crack break due to tensile force, thereby causing a change in the impedance value of the first resistance lines 211 and the impedance value of the circuit formed by the first resistance lines 211. That is, the presence of a crack in the display screen 100 can be determined by detecting the equivalent impedance value of each first resistance line 211 and / or the circuit formed by the first resistance lines 211.

[0031] Furthermore, the display device also includes a crack detection element 300, which is connected to the first resistance wire 211 to measure the equivalent impedance value of the electrode circuit formed by the first resistance wire 211. Specifically, the crack detection element 300 measures the equivalent impedance value of the electrode circuit formed by the first resistance wire 211 as a first measured value, and determines whether the display screen 100 has a crack based on the correspondence between the first measured value and whether the first resistance wire 211 is broken.

[0032] One principle of this invention is to install a first resistance wire 211 in the display screen 100. When the display screen 100 breaks, the tensile force generated at the break point will break the first resistance wire 211. The equivalent impedance value of the electrode circuit formed by the first resistance wire 211 is measured by the crack detection device 300 to determine whether there is a break in the first resistance wire 211. Therefore, the presence of a crack in the display screen 100 is determined by whether the first resistance wire 211 is broken. Specifically, if the first resistance wire 211 is broken, the display screen 100 has a crack. If the first resistance wire 211 is not broken, the display screen 100 has no crack.

[0033] A crack in the display screen 100 will cause the first resistance wire 211 at the crack to break. The equivalent impedance value of the broken first resistance wire 211 can be considered infinite. Therefore, the first equivalent impedance value of each first resistance wire 211 can be measured to determine whether there is a break in the first resistance wire 211, and thus determine whether there is a crack in the display screen 100. In addition, the formed electrode circuit can contain multiple first resistance wires 211, and the equivalent impedance value of the electrode circuit formed by the first resistance wires 211 will change with the change of any one of the first resistance wires 211 in the electrode circuit. That is, the first resistance wire 211 in the detection circuit structure 200 can also be determined by measuring the equivalent impedance value of the formed electrode circuit, and thus determine whether there is a crack in the display screen 100.

[0034] Optionally, the crack detection component 300 is detachably electrically connected to the first resistance wire 211, meaning the crack detection component 300 can be used to detect the presence of cracks in different displays 100. Specifically, during the production process of the display 100, the crack detection component 300 can be connected to the display 100 to detect the presence of cracks, thereby achieving quality monitoring of the display 100 production. Alternatively, before assembling the display 100 into electronic products, crack detection can be performed on the display 100 to be assembled, thereby avoiding the assembly of cracked display 100s into electronic products, optimizing quality control during the electronic product assembly process, and improving product yield. As another embodiment, the crack detection component 300 can be integrated with the display 100, meaning that crack detection can be performed on the display 100 as needed. Specifically, the crack detection component 300 can be a device or circuit capable of measuring circuit impedance values, such as an IC, multimeter, or resistance tester. Optionally, the crack detection component 300 can also be an IC integrated into the electronic product, enabling the electronic product to have a self-testing function for whether the display screen 100 has cracks. Optionally, the crack detection component 300 is detachably electrically connected to the first resistance wire 211 via a BTB connector.

[0035] Reference Figure 5 and Figure 7 The first resistor lines 211 are connected in parallel within the display screen 100. Specifically, the first equivalent impedance value of the circuit formed by the parallel connection of the first resistor lines 211 is R. 总 The impedance values ​​of each first resistor line 211 are R1, R2, R3, ..., R n The relationship between the first equivalent impedance value of the circuit formed by the parallel connection of the first resistor lines 211 and the impedance value of each first resistor line 211 is as follows:

[0036] 1 / R 总 = 1 / R1 + 1 / R2 + 1 / R3 + ... + 1 / R n

[0037] Specifically, the crack detection component 300 measures the equivalent impedance value of the electrode circuit formed by the parallel connection of the first resistance wires 211 as a first measured value, and the equivalent impedance value of the parallel connection of the first resistance wires 211 without breakage as a first theoretical value. Since the impedance value corresponding to a broken first resistance wire 211 is infinite, when the first measured value is greater than the first theoretical value, the display screen 100 has a crack. When the first measured value is equal to the first theoretical value, that is, there is no breakage in the first resistance wires 211, the display screen 100 has no crack.

[0038] It should be noted that the correspondence between the first measured value and whether the first resistance wire 211 is broken in the above embodiment does not consider the measurement error of the crack detection element 300. That is, the magnitude of the first measured value is equal to the actual impedance value of the electrode circuit formed by the unbroken first resistance wire 211. However, in the actual implementation, the correspondence between the first measured value and whether the first resistance wire 211 is broken can be adaptively adjusted according to the measurement error of the crack detection element 300.

[0039] Specifically, to avoid misjudging the presence of cracks in the display screen 100 due to measurement errors, the presence of a crack in the display screen 100 can be determined by whether the difference between the first measured value and the first theoretical value exceeds the measurement error range of the crack detection element 300. Specifically, if the difference between the first measured value and the first theoretical value exceeds the measurement error range of the crack detection element 300, then the first measured value is greater than the first theoretical value, thus confirming the presence of a crack in the display screen 100. If the difference between the first measured value and the first theoretical value is within the measurement error range of the crack detection element 300, then when determining whether a crack exists in the display screen 100, it can be assumed that the first measured value is equal to the first theoretical value, meaning that no crack exists in the display screen 100. It should be noted that a crack detection element 300 with higher measurement accuracy can be selected as needed to improve the accuracy of detecting whether a crack exists in the display screen 100. Alternatively, the accuracy of detecting whether a crack exists in the display screen 100 can be improved by increasing the density of the first resistance wire 211.

[0040] Optionally, the impedance values ​​of any two first resistance lines 211 may be unequal, so as to determine which one or more first resistance lines 211 in the detection circuit structure 200 are broken by using the first measured value, and then determine the location of the crack in the display screen 100 based on the position of each first resistance line 211 in the display screen 100. Specifically, since the impedance values ​​of any two first resistance lines 211 are different, after different first resistance lines 211 break, the equivalent impedance value corresponding to the electrode circuit formed by the unbroken first resistance lines 211 in the detection circuit structure 200, i.e., the first measured value, changes differently from the impedance value of the electrode circuit formed by each first resistance line 211 when it is unbroken, i.e., the first theoretical value. Therefore, the location of the crack in the display screen 100 can be determined based on the difference between the first measured value and the first theoretical value.

[0041] In another optional embodiment, each first resistance line 211 is independently disposed within the display screen 100, and each first resistance line 211 forms an independent electrode circuit with the crack detection element 300. The crack detection element 300 measures the equivalent impedance value of each electrode circuit as a first measured value. When the first resistance line 211 is unbroken, the equivalent impedance value of each electrode circuit is a first theoretical value. If the first measured value corresponding to any electrode circuit is greater than the first theoretical value corresponding to the electrode circuit, it means that at least one first resistance line 211 in the electrode circuit is broken, indicating that the display screen 100 has a crack. If the first measured value and the first theoretical value corresponding to each electrode circuit are equal, it means that none of the first resistance lines 211 in each electrode circuit are broken, indicating that the display screen 100 has no crack. It should be noted that in this embodiment, the correspondence between the first measured value and whether the first resistance line 211 is broken does not consider the measurement error of the crack detection element 300; that is, the magnitude of the first measured value is equal to the actual impedance value of the electrode circuit formed by the unbroken first resistance line 211. Similarly to the aforementioned optional embodiments of the present invention, in specific implementation, the correspondence between the first measured value and whether the first resistance wire 211 is broken can be adaptively adjusted according to the measurement error of the crack detection component 300. The specific adaptive adjustment method will not be described in detail.

[0042] Reference Figures 3 to 7 The detection circuit structure 200 also includes multiple second resistance lines 221. These second resistance lines 221 are disposed within the display screen 100, and intersect with the first resistance line 211 to form a grid structure. This ensures that cracks in different directions will cause either the first resistance line 211 or the second resistance line 221 within the display screen 100 to break, thereby improving the detection accuracy of whether cracks exist in the display screen 100. Specifically, the crack detection element 300 is connected to the second resistance lines 221, and the crack detection element 300 detects the equivalent impedance value of the electrode circuit formed by the second resistance lines 221 as a second measured value. Based on the correspondence between the second measured value and whether the second resistance line 221 is broken, it determines whether a crack exists in the display screen 100.

[0043] In one embodiment of the present invention, second resistance wires 221 are connected in parallel within the display screen 100, and the impedance values ​​of any two second resistance wires 221 are not equal, so as to determine the location of the crack in the display screen 100 through a second measurement value. Since the first resistance wire 211 has a certain length, by measuring the equivalent impedance value of the electrode circuit formed by the first resistance wires 211, it is only possible to determine which one or more first resistance wires 211 are broken, but not the location of the break. That is, by only using the first resistance wires 211, it is only possible to determine that the crack in the display screen 100 is located in the area where the broken first resistance wire 211 is located, but not the specific location of the crack. This embodiment, by adding a second resistance wire 221, and having the second resistance wire 221 intersect with the first resistance wire 211, can determine the specific location of the crack by utilizing the intersection of the areas where the broken second resistance wire 221 and the broken first resistance wire 211 are located. That is, the crack is located in the intersection area of ​​the broken second resistance wire 221 and the broken first resistance wire 211, thereby improving the accuracy of crack location determination. Of course, based on this, the number of the first resistance wire 211 and the second resistance wire 221 can be increased as needed to improve the accuracy of crack location determination.

[0044] In another embodiment, each second resistance line 221 is independently disposed within the display screen 100, and the second resistance line 221 and the crack detection element 300 form an independent electrode circuit. Specifically, the crack detection element 300 measures the equivalent impedance value of each electrode circuit as a second measured value, and the equivalent impedance value of the electrode circuit formed by the second resistance line 221 without breakage is a second theoretical value. When the second measured value corresponding to the electrode circuit formed by any second resistance line 221 in the detection circuit structure 200 is greater than its corresponding theoretical value, a crack exists in the display screen 100. Furthermore, the location of the broken second resistance line 221 can be determined by the second measured value measured by the crack detection element 300, thereby determining the location of the crack. In this embodiment, the second resistance line 221 and the first resistance line 211 are intersected, and the specific location of the crack can be determined by the intersection of the area where the broken second resistance line 221 is located and the area where the broken first resistance line 211 is located, that is, the crack is located in the intersection area of ​​the broken second resistance line 221 and the broken first resistance line 211, thereby improving the accuracy of crack location determination.

[0045] Reference Figure 3 , Figure 4 and Figure 7 The first resistance wire 211 is arranged at intervals along the first direction within the display screen 100, and the second resistance wire 221 is arranged at intervals along the second direction within the display screen 100. The first direction is perpendicular to the second direction, so as to facilitate the determination of the crack location in the display screen 100 and to facilitate the arrangement of the first resistance wire 211 and / or the second resistance wire 221 within the display screen 100.

[0046] Reference Figure 1 and Figure 2 The detection circuit structure 200 includes a first circuit layer 210, a first insulating layer 230, and a second circuit layer 220 stacked sequentially. The first circuit layer 210 and the second circuit layer 220 are insulated and isolated by the first insulating layer 230. The first circuit layer 210 includes a plurality of first resistance lines 211, and the second circuit layer 220 includes a plurality of second resistance lines 221. The first circuit layer 210 provides a wiring basis for the first resistance lines 211, and the second circuit layer 220 provides a wiring basis for the second resistance lines 221. The first insulating layer 230 can effectively separate the first circuit layer 210 and the second circuit layer 220 to ensure that the first resistance lines 211 in the first circuit layer 210 and the second resistance lines 221 in the second circuit layer 220 are independent of each other, facilitating the cross wiring of the first resistance lines 211 and the second resistance lines 221.

[0047] Reference Figure 2 The first circuit layer 210 further includes a first electrode lead 212, through which the first resistance line 211 is electrically connected to the crack detection element 300. Optionally, the first electrode lead 212 includes a first anode lead 212a and a first cathode lead 212b. The first anode lead 212a connects the anode end of the first resistance line 211 to the anode end of the crack detection element 300, and the first cathode lead 212b connects the cathode end of the first resistance line 211 to the cathode end of the crack detection element 300.

[0048] Figure 4 , Figure 5 and Figure 7 A wiring method is provided in which the first resistance wires 211 are connected in parallel within the display screen 100. Specifically, the first anode lead 212a is connected to the anode end of each first resistance wire 211, and the first anode lead 212a is also connected to the anode end of the crack detection element 300. The first cathode lead 212b is connected to the cathode end of each first resistance wire 211, and the first cathode lead 212b is also connected to the cathode end of the crack detection element 300. The anode ends of the first resistance wires 211 share the first anode lead 212a, and the cathode ends of the first resistance wires 211 share the first cathode lead 212b, which reduces the number of first anode leads 212a and first cathode leads 212b, facilitating the routing of the first anode lead 212a within the display screen 100.

[0049] Reference Figure 2The second circuit layer 220 further includes a second electrode lead 222, through which the second resistance line 221 is electrically connected to the crack detection element 300. Optionally, the second electrode lead 221 includes a second anode lead 222a and a second cathode lead 222b. The second anode lead 222a connects the anode end of the second resistance line 221 to the anode end of the crack detection element 300, and the second cathode lead 222b connects the cathode end of the second resistance line 221 to the cathode end of the crack detection element 300.

[0050] Figure 4 , Figure 6 An embodiment is disclosed in which each second resistance wire 221 forms an independent electrode circuit with the crack detection element 300. Specifically, the second cathode lead 222b is connected to the cathode end of each second resistance wire 221, and the second cathode lead 222b is also connected to the cathode end of the crack detection element 300. The second anode lead 222a corresponds one-to-one with each second resistance wire 221, and both ends of the second anode lead 222a are connected to the anode end of the second resistance wire 221 and the anode end of the crack detection element 300, respectively. Each second resistance wire 221 shares the second cathode lead 222b, reducing the number of second cathode leads 222b and facilitating the arrangement of the second resistance wires 221 within the display screen 100. The one-to-one correspondence between the second anode leads 222a and the second resistance wires 221 allows the crack detection element 300 to measure the equivalent impedance value of the electrode circuit formed by each second anode lead 222a, which not only improves the accuracy of crack detection in the display screen 100 but also determines the location of the crack within the display screen 100.

[0051] Another implementation of the second resistance wire 221 forming an independent electrode circuit with the crack detection element 300 is as follows: Specifically, the second anode lead 222a is connected to the anode end of each second resistance wire 221, and the second anode lead 222a is also connected to the anode end of the crack detection element 300. The second cathode lead 222b corresponds one-to-one with the second resistance wire 221, and both ends of the second cathode lead 222b are connected to the cathode end of the second resistance wire 221 and the cathode end of the crack detection element 300, respectively.

[0052] It should be noted that the implementation method in which the second resistance wire 221 and the crack detection element 300 form an independent electrode circuit also applies to the first resistance wire 211. Similarly, the wiring method in which the first resistance wire 211 is connected in parallel within the display screen 100 also applies to the parallel connection of the second resistance wire 221; see the specific details for reference. Figure 7 .

[0053] Reference Figures 3 to 7The first resistance lines 211 are parallel to each other and equally spaced. Optionally, the second resistance lines 221 are parallel to each other and equally spaced. The parallelism of the first resistance lines 211 and the second resistance lines 221 facilitates processing and wiring. The equal spacing between adjacent first resistance lines 211 ensures consistent accuracy in crack detection across the display screen 100.

[0054] The display screen 100 includes a display area, and the detection circuit structure 200 is disposed within the display area. (See reference...) Figure 2 The display screen 100 includes a light-emitting layer 120 and a TFE thin-film encapsulation layer 110, with the TFE thin-film encapsulation layer 110 stacked on the light-emitting layer 120. The detection circuit structure 200 is disposed within the TFE thin-film encapsulation layer 110. The black patch problem in the display screen 100 is mainly caused by cracks in the TFE thin-film encapsulation layer 110. Placing the detection circuit structure 200 within the TFE thin-film encapsulation layer 110 can more effectively prevent the black patch problem from occurring in the display screen 100.

[0055] Reference Figure 3 The light-emitting layer 120 includes a plurality of arrayed light-emitting elements 121. The light-emitting elements 121 are staggered with the first resistance line 211 and the second resistance line 221. Specifically, the staggered distribution of the light-emitting elements 121 with the first and second resistance lines 211 and 221 allows the first and second resistance lines 211 and 221 to avoid the light-emitting elements 121 and instead run through the gaps between adjacent light-emitting elements 121. This prevents the first and second resistance lines 211 and 221 from blocking the light emitted by the light-emitting elements 121, ensuring the display effect of the display screen 100. Optionally, the light-emitting element 121 can be a sub-pixel unit.

[0056] Reference Figure 1 and Figure 2The TFE thin-film encapsulation layer 110 includes a first inorganic insulating layer 111, an organic planar insulating layer 112, and a second inorganic insulating layer 113 stacked sequentially. The first inorganic insulating layer 111 is bonded to the light-emitting layer 120, and the detection circuit structure 200 is located between the second inorganic insulating layer 113 and the organic planar insulating layer 112. The first inorganic insulating layer 111 and the second inorganic insulating layer 113 are SiNx inorganic layers, which function to block water and oxygen, prolong the water and oxygen intrusion path, improve the UV light and water and oxygen resistance of the display device, extend the lifespan of the display, and enhance the encapsulation effect. The organic planar insulating layer 112 provides a flat mounting base for the adjacent layer structure, buffers stress, and improves the product's flexibility. Optionally, the first insulating layer 230 is a SiNx inorganic layer, which further enhances the function of blocking water and oxygen, prolonging the water and oxygen intrusion path, and enhancing the encapsulation effect. The detection circuit structure 200 is located between the second inorganic insulating layer 113 and the organic planar insulating layer 112, so that the first resistance line 211 and the second resistance line 221 can approach the first inorganic insulating layer 111 and the second inorganic insulating layer 113, thereby enabling the tensile force generated by the cracking of the first inorganic insulating layer 111 and the second inorganic insulating layer 113 to be effectively transmitted to the first resistance line 211 and the second resistance line 221, improving the accuracy of crack detection in the display screen 100.

[0057] Reference Figure 2 The crack detection element 300 is located on the side of the first inorganic insulating layer 111 opposite to the detection circuit structure 200. The TFE thin film encapsulation layer 110 has a lead-through hole 114, through which the first electrode lead 212 passes and is electrically connected to the crack detection element 300. The second electrode lead 222 also passes through the lead-through hole 114 and is electrically connected to the crack detection element 300. The lead-through hole 114 in the TFE thin film encapsulation layer 110 facilitates wiring of the first electrode lead 212 and the second electrode lead 222, and also allows for wiring below the display screen 100, providing greater concealment. Optionally, the first insulating layer 230 has a first electrode lead hole, through which the first electrode lead 212 passes.

[0058] Optionally, the first resistance wire 211 and / or the second resistance wire 221 can be metal wires. Specifically, different diameters or different materials of metal wires can be used as the first resistance wire 211 or the second resistance wire 221, depending on the size of the crack to be detected. Specifically, the smaller the crack to be detected, i.e., the higher the crack detection accuracy, the smaller the diameter of the first resistance wire 211 and the second resistance wire 221, or the closer the toughness of the material is to the toughness of the display screen 100.

[0059] Based on the display device disclosed in the above embodiments, the present invention also discloses a method for detecting cracks in a display screen. This method for detecting cracks in a display screen is applicable to the display device described above, and specifically, the method includes:

[0060] The equivalent impedance value of the electrode circuit formed by the first resistance line 211 is the first measured value;

[0061] Based on the correspondence between the first measured value and the breakage of the first resistance line 211, it is determined whether the display screen 100 has cracks.

[0062] Specifically, the first measured value can be the equivalent impedance value of an electrode circuit formed by a single first resistance line 211, or it can be the equivalent impedance value of an electrode circuit formed by multiple first resistance lines 211.

[0063] In the electrode circuit formed by the first resistance wire 211 without breakage, the impedance value is the first theoretical value. If the first measured value is greater than the first theoretical value, a crack exists on the display screen 100; if the first measured value is equal to the first theoretical value, no crack exists on the display screen 100. It should be noted that the correspondence between the first measured value and whether the first resistance wire 211 is broken in the above embodiment does not consider the measurement error of the crack detection device 300; that is, the magnitude of the first measured value is equal to the actual impedance value of the electrode circuit formed by the unbroken first resistance wire 211. However, in specific implementation, the correspondence between the first measured value and whether the first resistance wire 211 is broken can be adaptively adjusted according to the measurement error of the crack detection device 300.

[0064] Specifically, to avoid misjudging the presence of cracks in the display screen 100 due to measurement errors, the presence of a crack in the display screen 100 can be determined by whether the difference between the first measured value and the first theoretical value exceeds the measurement error range of the crack detection element 300. If the difference exceeds the measurement error range of the crack detection element 300, the first measured value is greater than the first theoretical value, thus confirming the presence of a crack in the display screen 100. If the difference is within the measurement error range of the crack detection element 300, the first measured value is considered equal to the first theoretical value, indicating the absence of a crack in the display screen 100. It should be noted that a crack detection element 300 with higher measurement accuracy can be selected as needed to improve the accuracy of crack detection in the display screen 100.

[0065] In the detection circuit structure 200, the impedance values ​​of any two first resistance lines 211 are set to be unequal. Because the impedance values ​​of each first resistance line 211 are different, the change in the equivalent impedance value of the electrode circuit formed by the breakage of different first resistance lines 211 is also different. Therefore, the difference between the first measured value and the first theoretical value can be used to determine which one or more first resistance lines 211 in the detection circuit structure 200 are broken, and the location of the crack in the display screen 100 can be determined based on the position of the broken first resistance line 211 in the display screen 100.

[0066] Reference Figure 3 , Figure 4 and Figure 7 The detection circuit structure 200 also includes a plurality of second resistance lines 221, which are disposed within the display screen 100. The plurality of second resistance lines 221 intersect with the plurality of first resistance lines 211 to form a grid structure. The detection method further includes:

[0067] The equivalent impedance value of the electrode circuit formed by the second resistance line 221 is measured as the second measured value;

[0068] Based on the correspondence between the second measured value and the breakage of the second resistance line 221, it is determined whether the display screen 100 has a crack.

[0069] Specifically, the impedance value of the second resistance wire 221 in the electrode circuit formed by the second resistance wire 221 without breakage is the second theoretical value. If the second measured value is greater than the second theoretical value, a crack exists on the display screen 100. If the second measured value is equal to the second theoretical value, there is no crack on the display screen 100. Similar to the detection of whether there is a crack in the display screen 100 by the first resistance wire 211, in this embodiment, the correspondence between the second measured value and whether the second resistance wire 221 is broken does not consider the measurement error of the crack detection device 300, that is, the magnitude of the second measured value is equal to the actual impedance value of the electrode circuit formed by the unbroken second resistance wire 221. In the specific implementation process, the correspondence between the first measured value and whether the second resistance wire 221 is broken can be adaptively adjusted according to the measurement error of the crack detection device 300. The specific adaptive adjustment method will not be described in detail.

[0070] In the detection circuit structure 200, the impedance values ​​of any two second resistance lines 221 are set to be unequal. The difference between the second measured value and the second theoretical value is used to determine which one or more second resistance lines 221 in the detection circuit structure 200 are broken, and then the location of the crack in the display screen 100 is determined based on the position of the broken second resistance line 221 in the display screen 100.

[0071] Optionally, the location of the crack in the display screen 100 can be further determined based on the positions of the broken first resistance wire 211 and the broken second resistance wire 221 within the display screen 100, thereby improving the accuracy of crack location detection. Specifically, the overlapping area between the regions where the first resistance wire 211 and the second resistance wire 221 are located, i.e., the area where the regions where the first resistance wire 211 and the second resistance wire 221 intersect, is the area where the crack is located in the display screen 100.

[0072] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0073] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A display device, characterized by comprising: The display screen (100), the crack detection component (300) and the detection circuit structure (200), the detection circuit structure (200) includes a plurality of first resistance lines (211), the first resistance line (211) is arranged in the display screen (100) at intervals, the crack detection component (300) is connected with the first resistance line (211), wherein, The crack detection component (300) measures the equivalent impedance value of the electrode loop formed by the first resistance line (211) as a first measurement value, and determines whether the display screen (100) has a crack according to the corresponding relationship between the first measurement value and whether the first resistance line is broken. The detection circuit structure (200) further includes a plurality of second resistance lines (221), the second resistance line (221) is arranged in the display screen (100), and the second resistance line (221) and the first resistance line (211) form a grid structure; the crack detection component (300) is connected with the second resistance line (221), and the crack detection component (300) detects the equivalent impedance value of the electrode loop formed by the second resistance line (221) as a second measurement value, and determines whether the display screen (100) has a crack according to the corresponding relationship between the second measurement value and whether the second resistance line is broken.

2. The display device according to claim 1, wherein The first resistance line (211) is arranged in parallel in the display screen (100), the crack detection component (300) measures the equivalent impedance value of the electrode loop formed by the first resistance line (211) in parallel as a first measurement value, the equivalent impedance value of the first resistance line (211) in parallel and without breaking is a first theoretical value, the first measurement value is greater than the first theoretical value, and the display screen (100) has a crack; the first measurement value is equal to the first theoretical value, and the display screen (100) has no crack.

3. The display device according to claim 2, wherein The impedance values of any two first resistance lines (211) are not equal.

4. The display device according to claim 1, wherein Each of the first resistance lines (211) is independently arranged in the display screen (100), and each of the first resistance lines (211) and the crack detection component (300) form a mutually independent electrode loop, The crack detection component (300) measures the equivalent impedance value of each electrode loop as a first measurement value, the equivalent impedance value of each electrode loop without breaking of the first resistance line (211) is a first theoretical value, The first measurement value corresponding to any one of the electrode loops is greater than the first theoretical value corresponding to the electrode loop, and the display screen (100) has a crack; The first measurement value and the first theoretical value corresponding to each of the electrode loops are equal, and the display screen (100) has no crack.

5. The display device according to claim 1, wherein The second resistance lines (221) are arranged in parallel in the display screen (100), and the impedance values of any two second resistance lines (221) are not equal. Or, Each of the second resistance lines (221) is independently arranged in the display screen (100), and the second resistance line (221) and the crack detection component (300) form an independent electrode loop.

6. The display device according to claim 1, wherein The first resistance lines (211) are arranged in the display screen (100) in a first direction, and the second resistance lines (221) are arranged in the display screen (100) in a second direction, the first direction being perpendicular to the second direction.

7. The display device according to claim 1, wherein The detection circuit structure (200) comprises a first circuit layer (210), a first insulating layer (230) and a second circuit layer (220) arranged in sequence, The first circuit layer (210) and the second circuit layer (220) are insulated and separated by the first insulating layer (230), the first circuit layer (210) comprises a plurality of the first resistance lines (211), and the second circuit layer (220) comprises a plurality of the second resistance lines (221).

8. The display device according to claim 7, wherein The first circuit layer (210) further comprises a first electrode lead (212), the first resistance lines (211) are electrically connected to the crack detection member (300) through the first electrode lead (212), and / or, The second circuit layer (220) further comprises a second electrode lead (222), the second resistance lines (221) are electrically connected to the crack detection member (300) through the second electrode lead (222).

9. The display device of claim 8, wherein, The first electrode lead (212) comprises a first anode lead (212a) and a first cathode lead (212b), The first anode lead (212a) is connected to the anode end of each of the first resistance lines (211), and the first anode lead (212a) is connected to the anode end of the crack detection member (300); the first cathode lead (212b) is connected to the cathode end of each of the first resistance lines (211), and the first cathode lead (212b) is connected to the cathode end of the crack detection member (300).

10. The display device according to claim 8, wherein The second electrode lead (222) comprises a second anode lead (222a) and a second cathode lead (222b), The second anode lead (222a) is connected to the anode end of each of the second resistance lines (221), and the second anode lead (222a) is connected to the anode end of the crack detection member (300); the second cathode lead (222b) corresponds to each of the second resistance lines (221), and two ends of the second cathode lead (222b) are respectively connected to the cathode end of the second resistance line (221) and the cathode end of the crack detection member (300); or, The second cathode lead (222b) is connected to the cathode end of each of the second resistance lines (221), and the second cathode lead (222b) is connected to the cathode end of the crack detection member (300); the second anode lead (222a) corresponds to each of the second resistance lines (221), and two ends of the second anode lead (222a) are respectively connected to the anode end of the second resistance line (221) and the anode end of the crack detection member (300).

11. The display device according to claim 1, wherein The first resistance lines (211) are parallel to each other and arranged at equal intervals; and / or, the second resistance lines (221) are parallel to each other and arranged at equal intervals.

12. The display device according to claim 1, wherein The display screen (100) comprises a display area, and the detection circuit structure (200) is arranged in the display area.

13. The display device of claim 8, wherein, The display screen (100) comprises a light-emitting layer (120) and a TFE thin film encapsulation layer (110), the TFE thin film encapsulation layer (110) is stacked on the light-emitting layer (120), and the detection circuit structure (200) is arranged in the TFE thin film encapsulation layer (110).

14. The display device of claim 13, wherein, The light-emitting layer (120) comprises a plurality of array-distributed light-emitting bodies (121), the light-emitting bodies (121) are distributed in a staggered manner with the first resistance wire (211), and the light-emitting bodies (121) are distributed in a staggered manner with the second resistance wire (221).

15. The display device of claim 13, wherein, The TFE thin film encapsulation layer (110) comprises a first inorganic insulating layer (111), an organic flat insulating layer (112) and a second inorganic insulating layer (113) stacked in sequence, wherein the first inorganic insulating layer (111) is attached to the light-emitting layer (120), and the detection circuit structure (200) is located between the second inorganic insulating layer (113) and the organic flat insulating layer (112).

16. The display device of claim 15, wherein, The crack detection piece (300) is located on a side of the first inorganic insulating layer (111) away from the detection circuit structure (200), the TFE thin film encapsulation layer (110) is provided with a lead hole (114), and the first electrode lead (212) is electrically connected to the crack detection piece (300) through the lead hole (114). The second electrode lead (222) is electrically connected to the crack detection piece (300) through the lead hole (114).

17. The display device of claim 8, wherein, The first insulating layer (230) is provided with a first electrode lead hole, and the first electrode lead (212) passes through the first insulating layer (230) from the first electrode lead hole.

18. A method of detecting cracks in a display screen, the method comprising: The display device of claim 1, the detection method comprising: measuring an equivalent impedance value of the first resistance wire forming an electrode loop as a first measurement value; determining whether the display screen has a crack according to a correspondence between the first measurement value and a break of the first resistance wire; The detection circuit structure further comprises a plurality of second resistance wires, the second resistance wires are arranged in the display screen, the second resistance wires and the first resistance wires cross to form a grid structure, and the detection method further comprises: measuring an impedance value of the second resistance wire forming an electrode loop as a second measurement value, determining whether the display screen has a crack according to a correspondence between the second measurement value and a break of the second resistance wire.

19. The detection method of claim 18, wherein, The impedance value of the first resistance wire in the electrode loop formed by the first resistance wire without a break is a first theoretical value, the first measurement value is greater than the first theoretical value, and the display screen has a crack; the first measurement value is equal to the first theoretical value, and the display screen has no crack.

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