Display panel, detection method thereof and display device

Abstract

The invention provides a display panel, a detection method thereof and a display device, the display panel comprises a substrate, an array layer and a first detection line, and the array layer is arranged on one side of the substrate; the first detection line is arranged in the array layer, and at least part of the first detection line surrounds the opening area. According to the display panel provided by the invention, the first detection lines are arranged in the array layer, and when the array layer has cracks, the change of the electrical characteristics of the first detection lines can be triggered, so that high-precision detection of array cracks is realized, and display abnormity and product failure caused by the fact that the array cracks are not found are avoided; and the stability and the reliability of the product in the use process are improved.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to a display panel, a detection method thereof, and a display device. Background Art

[0002] With the development of technology and the needs of users, touch electronic products with functions such as under-screen recognition and photography have emerged. The touch display panel will set openings in the corresponding recognition and photography areas to increase the light transmittance. When processing the touch display panel to generate openings, cracks may occur in the areas around the openings. There are deficiencies in the current display panel in detecting cracks in the hole area, which affects the control and improvement of product quality. Summary of the Invention

[0003] In view of this, the purpose of the present application is to provide a display panel, a detection method thereof, and a display device, which can effectively detect the cracks in the array layer around the opening area.

[0004] Based on the above purpose, the first aspect of the present application provides a display panel with an opening area, and the display panel includes: a substrate;

[0005] An array layer disposed on one side of the substrate;

[0006] A first detection line disposed in the array layer, and at least part of the first detection line surrounds the opening area.

[0007] In one implementation, the display panel further includes:

[0008] A packaging layer disposed on the side of the array layer away from the substrate;

[0009] A second detection line disposed between the substrate and the packaging layer, and the surface of the packaging layer close to the substrate contacts the second detection line;

[0010] Optionally, the second detection line is electrically connected to the first detection line;

[0011] Optionally, the film layer where the second detection line is located is on the side of the film layer where the first detection line is located away from the substrate;

[0012] Optionally, the orthographic projection of the second detection line on the substrate at least partially overlaps with the orthographic projection of the first detection line on the substrate;

[0013] Optionally, the second detection line is connected to the first detection line through a wire-changing hole;

[0014] Optionally, the first detection line is a crack detection line.

[0015] In one implementation,

[0016] The array layer includes a gate conductive layer, a capacitor plate layer, and a wiring layer that are located on a substrate and stacked;

[0017] Optionally, the first detection line is located in at least one of the gate conductive layer and the capacitor plate layer;

[0018] Optionally, the second detection line is located in the wiring layer;

[0019] Optionally, the gate conductive layer includes a first gate layer and a second gate layer, and the array layer further includes a first active layer and a second active layer. The first active layer, the first gate layer, the capacitor plate layer, the second active layer, the second gate layer, and the wiring layer are stacked in sequence in a direction away from the substrate; the first detection line is located in at least one of the first gate layer, the second gate layer, and the capacitor plate layer.

[0020] In one implementation, the first detection line includes a first end and a second end that are oppositely arranged;

[0021] The display panel includes two second detection lines, and the two second detection lines are respectively connected to the first end and the second end;

[0022] Optionally, the first detection line includes a winding portion that extends along the circumference of the opening area;

[0023] Optionally, the first detection line includes at least two winding portions, and the at least two winding portions are arranged inside and outside and connected together.

[0024] In one implementation, the encapsulation layer includes a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer that are stacked in sequence in a direction away from the substrate;

[0025] Optionally, the first encapsulation layer and the third encapsulation layer are inorganic encapsulation layers, and the second encapsulation layer is an organic encapsulation layer;

[0026] Optionally, the display panel further includes a dam, and the second encapsulation layer is located on a side of the dam away from the opening area;

[0027] Optionally, the wire replacement hole is located on a side of the dam away from the opening area;

[0028] Optionally, at least a part of the second detection line is located on a side of the dam away from the opening area;

[0029] Optionally, the display panel has a display area, and at least a part of the second detection line is located in the display area.

[0030] In one implementation, the display panel further includes:

[0031] A touch layer, disposed on a side of the encapsulation layer away from the substrate;

[0032] Optionally, the touch layer includes a touch insulating layer and a touch protection layer, and the touch protection layer is located on a side of the touch insulating layer away from the substrate;

[0033] Optionally, the display panel further includes a planarization layer, and the planarization layer is disposed between the encapsulation layer and the touch layer.

[0034] A second aspect of the present application provides a method for detecting a display panel. The display panel has an opening area. The method includes:

[0035] Providing a first electrical signal to a first detection line and detecting a second electrical signal of the first detection line; wherein, the first detection line is located in the array layer and at least partially surrounds the opening area;

[0036] Based on the first electrical signal and the second electrical signal, determining whether there is an abnormality in the array layer.

[0037] In one implementation, two ends of the first detection line are respectively connected to corresponding second detection lines; wherein, the second detection line is in contact with the encapsulation layer; the method for detecting the display panel includes:

[0038] Based on the first electrical signal and the second electrical signal of the second detection line, determining whether there is an abnormality in the array layer and the encapsulation layer.

[0039] In one implementation, the step of determining whether there is an abnormality in the array layer based on the first electrical signal and the second electrical signal includes:

[0040] Calculating a line impedance based on the first electrical signal and the second electrical signal;

[0041] When the line impedance is greater than or equal to a preset threshold, it is determined that there is an abnormality.

[0042] A third aspect of the present application provides a display device. The display device includes an optical element and the display panel in the first aspect above, and the optical element is disposed in the opening area.

[0043] The display panel provided by the present application realizes high-precision detection of array cracks by setting the first detection line in the array layer. When cracks appear in the array layer, it can cause changes in the electrical characteristics of the first detection line, avoiding display abnormalities and product failures caused by undetected array cracks, and improving the stability and reliability of the product during use. Description of the Drawings

[0044] In order to more clearly illustrate the technical solutions in the present application or related technologies, the following will briefly introduce the drawings required for use in the embodiments or related technology descriptions. Obviously, the drawings in the following descriptions are only embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0045] Figure 1 It is a schematic cross-sectional structure diagram of a related display panel;

[0046] Figure 2 It is a schematic plan view of the display panel provided by an embodiment of the present application;

[0047] Figure 3 It is a schematic cross-sectional structure diagram of the display panel provided by an embodiment of the present application;

[0048] Figure 4 It is a schematic cross-sectional structure diagram of the display panel provided by another embodiment of the present application;

[0049] Figure 5 It is a schematic plan view of the partial structure of the display panel in another embodiment of the present application;

[0050] Figure 6 It is a schematic plan view of the partial structure of the display panel in an embodiment of the present application;

[0051] Figure 7 It is a schematic cross-sectional structure diagram of the display area of the display panel provided by an embodiment of the present application;

[0052] Figure 8 It is a flowchart of the detection method of the display panel provided by another embodiment of the present application.

[0053] Marking description:

[0054] 100, display panel; 101, display area; 102, detection area; 103, opening area;

[0055] 1, substrate; 2, array layer; 21, first detection line; 210, winding part; 211, first end; 212, second end; 22, second detection line; 220, wire-changing hole; 23, wiring layer; 24, first active layer; 25, first gate layer; 251, gate; 231, source; 232, drain; 271, first capacitor plate; 272, second capacitor plate; 20, light-emitting device; 201, anode layer; 202, light-emitting layer; 203, cathode layer; 26, fourth conductive layer; 28, second active layer; 291, second gate layer; 292, bottom gate; 3, encapsulation layer; 31, first encapsulation layer; 32, second encapsulation layer; 33, third encapsulation layer; 4, touch layer; 40, crack detection line; 41, touch insulation layer; 42, touch protection layer; 43, touch electrode; 5, dam; 6, planarization layer. Detailed implementation manners

[0056] To make the objectives, technical solutions, and advantages of this application more clear and understandable, the following further elaborates on this application in detail with reference to specific embodiments and the accompanying drawings.

[0057] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the embodiments of this application should have the ordinary meanings understood by those with ordinary skills in the field to which this application belongs. The terms "first", "second", and similar terms used in the embodiments of this application do not denote any order, quantity, or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative position relationships, and when the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0058] During the production and application process of a flexible display panel, an opening area can be set for arranging under-screen devices such as cameras. When processing the display panel (such as cutting the display panel by laser cutting, etc.) to form an opening, there is a certain risk of causing cracks in the area around the opening, and the cracks may damage the structure of the display panel and lead to poor touch functions. Thus, a crack detection line (which can be called a PCD line) can be set around the opening area to detect whether cracks occur around the opening area and the severity of the cracks. This detection line needs to be led out from the touch area of the touch substrate to the surrounding wiring area or border area to be transferred to an external detection circuit (such as a touch chip).

[0059] Currently, as Figure 1 shown, in the display panel 100 of the related art, the display panel 100 includes a substrate 1, an array layer 2, a thin film encapsulation (TFE) layer 3, and a touch layer 4 that are sequentially stacked on the substrate 1. A crack detection line 40 is provided on the peripheral side of the opening area of the display panel 100, and among them, the crack detection line 40 is located within the touch layer 4.

[0060] However, through research by the inventors of this application, it is found that when a crack appears in the array layer 2 or when there is an abnormal peeling in the encapsulation layer 3, the film layer where the crack detection line 40 is located is not affected, and these abnormal situations cannot be effectively detected. Array cracks and encapsulation layer peeling are important reasons for the appearance of hole black spots, and the detection defects in this regard in the related art will affect the control and improvement of product quality and urgently need to be improved.

[0061] Based on this, the present application provides a solution for a display panel to solve the above problems. For specific reference, please refer to the following embodiments.

[0062] As Figure 2 、 Figure 3 As shown, some embodiments of the present application provide a display panel. Looking along the plane direction of the display panel 100, the display panel 100 has an opening area 103. Optionally, the display panel 100 includes a display area 101, an opening area 103, and a detection area 102. The detection area 102 is located between the display area 101 and the opening area 103. Specifically, the detection area 102 is arranged around the opening area 103.

[0063] Looking along the thickness direction of the display panel 100, the display panel 100 includes a substrate 1 and an array layer 2. The array layer 2 is arranged on one side of the substrate 1. The display panel 100 further includes a first detection line 21. The first detection line 21 is arranged in the array layer 2, and at least part of the first detection line surrounds the opening area 103. Specifically, the first detection line 21 is located in the detection area 102. The first detection line 21 can extend around the opening area 103 for one circle or less than one circle, or can extend for two circles or more. Among them, extending for one circle also includes the case of surrounding approximately one circle in a non-closed ring shape. For example, at least part of the first detection line surrounds at least part of the opening area 103.

[0064] Specifically, the opening area 103 can be, for example, a position for opening operations for installing components such as cameras and sensors. The first detection line 21 is used to form a crack detection circuit for crack detection. For example, by detecting the impedance change of the line where the first detection line 21 is located, it can be determined whether a crack occurs in the array layer 2 around the opening area 103. For example, under normal circumstances, the line impedance is in a stable state; when the first detection line 21 is broken and the line integrity is damaged, the impedance will increase significantly, thereby realizing effective detection of array cracks.

[0065] For the display panel 100 provided by the embodiments of the present application, by arranging the first detection line 21 in the array layer 2, when a crack occurs in the array layer 2, it can cause a change in the electrical characteristics (such as line impedance) of the first detection line 21, realizing high-precision detection of array cracks, avoiding display abnormalities and product failures caused by undetected array cracks, and improving the stability and reliability of the product during use.

[0066] As Figure 4 、 Figure 5 As shown, in at least one embodiment, the display panel 100 further includes a packaging layer 3 and a second detection line 22. The packaging layer 3 is arranged on the side of the array layer 2 away from the substrate 1. The second detection line 22 is arranged between the substrate 1 and the packaging layer 3, and the surface of the packaging layer 3 close to the substrate 1 is in contact with the second detection line 22.

[0067] Among them, when the encapsulation layer 3 is peeled off, the second detection line 22 will be exposed to the air, and then corrosion will occur. The corrosion causes the electrical characteristics of the second detection line 22 to change and the impedance to increase. By monitoring the impedance change of the line where the second detection line 22 is located, the peeling situation of the encapsulation layer 3 can be detected in time to ensure the reliability of the product packaging quality.

[0068] Among them, the encapsulation layer 3 can be a single-layer structure or a composite structure of at least two layers. For example, the materials of the encapsulation layer can include insulating materials such as silicon nitride, silicon oxide, silicon oxynitride, and polymer resin. For example, the encapsulation layer 3 can include a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer sequentially provided on the light-emitting device 20. For example, the materials of the first inorganic encapsulation layer and the second inorganic encapsulation layer can include inorganic materials such as silicon nitride, silicon oxide, and silicon oxynitride. The inorganic materials have high density and can prevent the intrusion of water, oxygen, etc. For example, the material of the organic encapsulation layer can be a polymer material containing a desiccant or a polymer material that can block water vapor, such as polymer resin, etc., to planarize the surface of the display panel, and can relieve the stress between the first inorganic encapsulation layer and the second inorganic encapsulation layer, and can also include water-absorbing materials such as desiccants to absorb substances such as water and oxygen that invade the interior.

[0069] In at least one embodiment, the second detection line 22 is electrically connected to the first detection line 21.

[0070] Optionally, the film layer where the second detection line 22 is located is on the side of the film layer where the first detection line 21 is located away from the substrate 1.

[0071] Optionally, the orthographic projection of the second detection line 22 on the substrate 1 at least partially overlaps with the orthographic projection of the first detection line 21 on the substrate 1.

[0072] Optionally, the second detection line 22 is connected to the first detection line 21 through a wire-changing hole 220. Specifically, the second detection line 22 and the first detection line 21 are electrically connected through the wire-changing hole 220. The wire-changing hole 220 can be used to connect wires located in different film layers to achieve line switching and ensure the detection function.

[0073] Optionally, the first detection line 21 is a crack detection line, and / or the second detection line 22 is a crack detection line, that is, a PCD line.

[0074] In the embodiment of the present application, both the first detection line 21 and the second detection line 22 are located between the substrate 1 and the encapsulation layer 3, and the two are electrically connected, and the cracks in the array layer 2 and the peeling situation of the encapsulation layer 3 can be detected simultaneously.

[0075] Further, as Figure 7As shown, in at least one embodiment, the array layer 2 includes a gate conductive layer, a capacitor plate layer, and a wiring layer 23 that are located on the substrate 1 and stacked, and an insulating layer is provided between adjacent two layers. The gate conductive layer may include a metal layer. The capacitor plate layer may include a metal layer. The wiring layer 23 may include a metal layer.

[0076] Optionally, the first detection line 21 may be located in one of the gate conductive layer 25 and the capacitor plate layer. The first detection line 21 may also include detection segments located in different layers of the gate conductive layer 25 and the capacitor plate layer.

[0077] Optionally, the second detection line 22 is disposed in the array layer 2. The second detection line 22 may be located in the wiring layer 23.

[0078] Specifically, the display panel may be an LTPO (Low Temperature Poly Oxide) display panel, which has the characteristics of low power consumption and good low-frequency display effect.

[0079] In the display area 101, the array layer 2 may include at least one transistor and a storage capacitor. The at least one transistor may include a first transistor, and the first transistor includes a first active layer 24, a gate 251, a source 231, and a drain 232. The storage capacitor may include a first capacitor plate 271 and a second capacitor plate 272. The gate 251 of the first transistor and the first capacitor plate 271 of the storage capacitor may be disposed in the same layer, that is, located in the gate conductive layer, such as the first gate layer 25. The second capacitor plate 272 of the storage capacitor may be located in the capacitor plate layer. The source 231 and the drain 232 of the first transistor may be located in the wiring layer 23. The first detection line 21 may be disposed in the same layer as at least one of the gate 251, the source 231, the drain 232, the first capacitor plate 271, and the second capacitor plate 272 of the transistor.

[0080] In addition, in the display area 101, the display panel 100 further includes a plurality of light-emitting devices 20 disposed on a side of the array layer 2 away from the substrate 1. The light-emitting devices 20 include an anode layer 201, a light-emitting layer 202, and a cathode layer 203, wherein the light-emitting layer 202 is located between the anode layer 201 and the cathode layer 203. The array layer 2, the light-emitting devices 20, the encapsulation layer 3, and the touch layer 4 are stacked in sequence in a direction away from the substrate 1.

[0081] Optionally, the gate conductive layer includes a first gate layer 25 and a second gate layer 291, and the array layer further includes a first active layer 24 and a second active layer 28. The first active layer 24, the first gate layer 25, the capacitor plate layer, the second active layer 28, the second gate layer 291, and the wiring layer 23 are sequentially stacked in a direction away from the substrate; the first detection line 21 is located in at least one of the first gate layer, the second gate layer, and the capacitor plate layer. The at least one layer can be one layer or multiple layers. For example, the first active layer 24 includes polysilicon. For example, the second active layer 28 includes a metal oxide, such as indium gallium zinc oxide (IGZO). The first gate layer 25 can include a metal layer. The second gate layer 291 can include a metal layer.

[0082] For example, an insulating layer is provided between any two adjacent ones of the first active layer 24, the first gate layer 25, the capacitor plate layer, the second active layer 28, the second gate layer 291, and the wiring layer 23.

[0083] For example, at least one transistor can include a second transistor, and the second transistor includes a second active layer 28, a bottom gate 292 and a top gate located on opposite sides of the second active layer 28 in the thickness direction of the substrate. For example, the top gate is located in the second gate layer 291.

[0084] For example, the wiring layer 23 can include multiple stacked metal layers, such as a titanium metal layer, an aluminum metal layer, and a titanium metal layer stacked in sequence in a direction away from the substrate.

[0085] As Figure 5 shown, in at least one embodiment, the first detection line 21 includes a first end 211 and a second end 212. The display panel 100 includes two second detection lines 22, and the two second detection lines 22 are respectively connected to the first end 211 and the second end 212. Among them, the second detection line 22 is multiplexed as a lead of the first detection line 21, and the two second detection lines 22 are respectively used to provide an input electrical signal and collect an output electrical signal. The first end 211 and the second end 212 can be oppositely arranged.

[0086] Optionally, the first detection line 21 includes a winding portion 210 extending along the circumference of the opening region 103. The winding portion 210 can be an annular structure with a notch.

[0087] Optionally, as Figure 6As shown, the first detection line 21 includes at least two winding portions 210 arranged at intervals inside and outside, and the at least two winding portions 210 are connected together in a form of folding back and winding. Among them, the first detection line 21 extends around the opening area 103 for two circles by folding back and winding at the edge of the opening area 103. In this way, the first detection line 21 is provided in a relatively wide area at the edge of the opening area 103. Therefore, as long as the crack extends to the position where the first detection line 21 exists, at least one position of the first detection line 21 will break. By detecting the line impedance of the first detection line 21, the generation of the crack can be detected, thereby improving the accuracy of crack detection. When the first detection line 21 breaks, the line impedance is large, and when the first detection line 21 does not break, the line impedance is small.

[0088] As Figure 3 , Figure 4 shown, in at least one embodiment, the encapsulation layer 3 includes a first encapsulation layer 31, a second encapsulation layer 32, and a third encapsulation layer 33 that are sequentially stacked in a direction away from the substrate.

[0089] Optionally, the first encapsulation layer 31 and the third encapsulation layer 33 are inorganic encapsulation layers, and the second encapsulation layer 32 is an organic encapsulation layer. The second encapsulation layer 32 is located in the display area 101. The inorganic encapsulation layer has high density to isolate water, oxygen, etc., and the organic encapsulation layer has a relatively large thickness and has a planarization function.

[0090] Optionally, the display panel 100 further includes a dam 5, and the second encapsulation layer 32 is located on a side of the dam 5 away from the opening area 103, or in other words, the dam 5 is provided between the opening area 103 and the display area 101. When preparing the second encapsulation layer (which may include organic materials), the dam 5 can be used to prevent the organic materials from overflowing.

[0091] Optionally, the wire-changing hole 220 is located on a side of the dam 5 away from the opening area 103. In this way, the risk of damage to the wire-changing structure by the opening area 103 can be reduced, and at the same time, the stable environment and wiring conditions in the display area 101 can be utilized to ensure the stable operation of the line switching and detection functions.

[0092] Optionally, at least a part of the second detection line 22 is located on a side of the dam 5 away from the opening area 103.

[0093] Optionally, at least a part of the second detection line 22 is located in the display area 101. As Figure 2 shown, a part of the second detection line 22 leads out through the display area 101, and the stable environment and wiring conditions in the display area 101 can be utilized to more comprehensively monitor problems such as array cracks and encapsulation layer peeling that may occur near the display area 101.

[0094] Optionally, the orthographic projection of the dam 5 on the substrate overlaps with the orthographic projection of the first detection line 21 on the substrate.

[0095] Optionally, the dam 5 is disposed around at least a part of the opening region 103. For example, the dam 5 can be annular.

[0096] As Figure 4 shown, in at least one embodiment, the display panel 100 further includes a touch layer 4, and the touch layer 4 is disposed on a side of the encapsulation layer 3 away from the substrate 1.

[0097] Optionally, the touch layer 4 includes a touch insulating layer 41 and a touch protection layer 42, and the touch protection layer 42 is located on a side of the touch insulating layer 41 away from the substrate 1. For example, in the display region 101, the touch layer 4 includes touch electrodes 43. The touch insulating layer 41 can be used to isolate the touch electrodes 43 from other components to prevent short circuits, and the touch protection layer 42 can be used to protect the touch electrodes 43.

[0098] Optionally, as Figure 4 shown, the display panel 100 further includes a planarization layer 6, and the planarization layer 6 is disposed between the encapsulation layer 3 and the touch layer 4. The material of the planarization layer 6 is an organic material, such as resin.

[0099] As Figure 8 shown, some other embodiments of the present application provide a method for detecting a display panel. The method for detecting a display panel can be applied to the display panel in the above embodiments. Based on the display panel 100 as Figure 2 and Figure 3 shown, the detection method thereof may include the following steps:

[0100] Step S10: Provide a first electrical signal to the first detection line 21 and detect a second electrical signal of the first detection line 21; wherein, the first detection line 21 is located in the array layer 2, and the first detection line 21 at least partially surrounds the opening region 103;

[0101] Step S20: Determine whether there is an abnormality in the array layer 2 based on the first electrical signal and the second electrical signal.

[0102] For example, the first electrical signal and the second electrical signal can be voltage signals or current signals. For example, one of the first electrical signal and the second electrical signal can be a voltage signal, and the other can be a current signal. When there is a crack around the opening area 103, the first detection line 21 will break with the generation of the crack, and the resistance will increase significantly. For example, when a voltage is provided to one end of the first detection line 21, when it is detected that the voltage value at the other end is significantly different from the normal state (such as a significant decrease in voltage or even zero), it can be determined that a crack has occurred. Or, an input voltage is provided to the first end 211 and the second end 212 of the first detection line 21, and there is a voltage difference between the first end 211 and the second end 212; the output current at the first end 211 or the second end 212 is detected, and based on this voltage difference and the output current, the resistance value of the first detection line 21 in the crack detection circuit can be calculated according to Ohm's law; when the resistance value is greater than or equal to the resistance threshold, it is considered that there is a crack.

[0103] The detection method of the display panel provided by the embodiment of the present application realizes high-precision detection of cracks in the array layer 2 by setting the first detection line 21 in the array layer 2, so that when a crack appears in the array layer 2, it can cause a change in its electrical characteristics (such as line impedance or resistance), avoiding display anomalies and product failures caused by undetected array cracks, and improving the stability and reliability of the display product during use.

[0104] In at least one embodiment, based on the display panel 100 as Figure 4 shown,

[0105] the first end 211 and the second end 212 of the first detection line 21 are respectively connected to the corresponding second detection lines 22; wherein, the surface of the second detection line 22 away from the substrate 1 is in contact with the encapsulation layer 3. The detection method of the display panel further includes the following steps:

[0106] Based on the first electrical signal and the second electrical signal of the two second detection lines 22, it is determined whether the array layer 2 and the encapsulation layer 3 are abnormal.

[0107] Optionally, as Figure 5 or Figure 6 shown, the first end 211 and the second end 212 of the first detection line 21 are respectively connected to the corresponding second detection lines 22.

[0108] Optionally, the second detection line 22 is used to provide the first electrical signal or collect the second electrical signal. Or rather, the second detection line 22 is multiplexed as the lead of the first detection line 21.

[0109] Among them, when the encapsulation layer 3 peels off, the second detection line 22 will be exposed to the air, and then corrosion will occur. The corrosion causes the electrical characteristics of the second detection line 22 to change and the impedance to increase. By monitoring the impedance change of the line where the second detection line 22 is located, the peeling situation of the encapsulation layer 3 can be detected in time to ensure the reliability of the encapsulation quality.

[0110] In at least one embodiment, step S20, judging whether there is an abnormality in the array layer 2 based on the first electrical signal and the second electrical signal, includes:

[0111] Calculating the line impedance based on the first electrical signal and the second electrical signal;

[0112] When the line impedance is greater than or equal to a preset threshold, it is determined that there is an abnormality.

[0113] For example, based on the first electrical signal and the second electrical signal, determine the sum of the impedances of the first detection line 21 and the second detection line 22, or the total impedance, or the sum of the series impedances, to determine the cracking situation and the peeling situation between the array layer and the encapsulation layer 3. The line impedance can be the sum of the impedances of the first detection line 21 and the second detection line 22, or the total impedance, or the sum of the series impedances. The first detection line 21 and the second detection line 22 can be equivalent to being in series.

[0114] For example, when the line impedance is greater than or equal to the first preset threshold, it is determined that there is a crack, that is, the first detection line 21 is broken. For example, when the line impedance is less than the first preset threshold and greater than or equal to the second preset threshold, it is determined that there is no crack and there is peeling between the encapsulation layer 3 and the array layer, that is, the first detection line 21 is not broken and the second detection line 22 is corroded. For example, the second preset threshold is less than the first preset threshold. For example, when the line impedance is less than the second preset threshold, it is determined that there is no crack and there is no peeling between the encapsulation layer 3 and the array layer, that is, the first detection line 21 is not broken and the second detection line 22 is not corroded.

[0115] For example, the display panel can be provided with a first test terminal connected to the first detection line 21. The first test terminal can receive the first electrical signal and / or output the second electrical signal.

[0116] For example, the display panel can be provided with a second test terminal connected to the second detection line 22. The second test terminal can receive the first electrical signal and / or output the second electrical signal.

[0117] The crack situation can be determined by determining the impedance of the first detection line 21. And / or, the peeling situation between the encapsulation layer 3 and the array layer can be determined by determining the impedance of the second detection line 22.

[0118] Another embodiment of the present application provides a display device, which includes an optical element and the display panel 100 in the above embodiment. The optical element is disposed in the opening area 103. The display device can be located in intelligent devices (such as mobile phones, wearable devices, VR devices, computers, televisions, in-vehicle displays, etc.). The optical element can be a front camera, a light sensor, etc., and is used to implement functions such as taking pictures and sensing ambient light.

[0119] For the display device provided by the present application, by disposing the first detection line 21 in the array layer 2 of the display panel 100, when a crack appears in the array layer 2, it can cause a change in its electrical characteristics (such as line impedance or resistance), achieving high-precision detection of the crack in the array layer 2, avoiding display anomalies and product failures caused by undetected array cracks, and improving the stability and reliability of the display product during use.

[0120] Although the present application has been described in conjunction with specific embodiments of the present application, many substitutions, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description.

[0121] It should be noted that some embodiments of the present application have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the above embodiments and still achieve the desired result. Additionally, the processes depicted in the figures do not necessarily require the particular order or sequential order shown to achieve the desired result. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0122] The embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, combinations, sub-combinations, etc., made within the spirit and principles of the embodiments of the present application shall be included within the protection scope of the present application.

Claims

1. A display panel, characterized in that: The display panel has an opening area, and the display panel includes: substrate; An array layer, disposed on one side of the substrate; The first detection line is arranged in the array layer, and the first detection line at least partially surrounds the opening area.

2. The display panel according to claim 1, characterized in that: The display panel further includes: A packaging layer, disposed on a side of the array layer away from the substrate; A second detection line is provided between the substrate and the packaging layer, Preferably, a surface of the encapsulation layer close to the substrate is in contact with the second detection line; Preferably, the second detection line is electrically connected to the first detection line; Preferably, the film layer where the second detection line is located is located on a side of the film layer where the first detection line is located away from the substrate; Preferably, the orthographic projection of the second detection line on the substrate at least partially overlaps with the orthographic projection of the first detection line on the substrate; Preferably, the second detection line is connected to the first detection line through a line-changing hole; Preferably, the first detection line is a crack detection line.

3. The display panel according to claim 2, characterized in that: The array layer includes a gate conductive layer, a capacitor plate layer and a wiring layer which are stacked and located on the substrate; Preferably, the first detection line is located at least one of the gate conductive layer and the capacitor plate layer; Preferably, the second detection line is located in the routing layer; Preferably, the gate conductive layer includes a first gate layer and a second gate layer, the array layer also includes a first active layer and a second active layer, the first active layer, the first gate layer, the capacitor plate layer, the second active layer, the second gate layer, and the wiring layer are stacked in sequence along a direction away from the substrate; the first detection line is located at least one of the first gate layer, the second gate layer and the capacitor plate layer.

4. The display panel according to claim 2, characterized in that: The first detection line includes a first end and a second end; The display panel comprises two second detection lines, and the two second detection lines are respectively connected to the first end and the second end; Preferably, the first detection line includes a winding portion extending along the circumference of the opening area; Preferably, the first detection line includes at least two winding parts, and the at least two winding parts are arranged inside and outside and connected together.

5. The display panel according to claim 2, characterized in that: The encapsulation layer comprises a first encapsulation layer, a second encapsulation layer and a third encapsulation layer which are sequentially stacked in a direction away from the substrate; Preferably, the first encapsulation layer and the third encapsulation layer are inorganic encapsulation layers, and the second encapsulation layer is an organic encapsulation layer; Preferably, the display panel further comprises a dam, and the second encapsulation layer is located on a side of the dam away from the opening area; Preferably, the line-changing hole is located on a side of the dam away from the opening area; Preferably, at least a portion of the second detection line is located on a side of the dam away from the opening area; Preferably, the display panel has a display area, and at least a portion of the second detection line is located in the display area.

6. The display panel according to claim 2, characterized in that: The display panel further includes: A touch layer, disposed on a side of the packaging layer away from the substrate; Preferably, the touch layer comprises a touch insulating layer and a touch protection layer, and the touch protection layer is located on a side of the touch insulating layer away from the substrate; Preferably, the display panel further comprises a planarization layer, and the planarization layer is arranged between the encapsulation layer and the touch control layer.

7. A method for detecting a display panel, wherein the display panel has an opening area, characterized in that: The method comprises: Providing a first electrical signal to a first detection line, and detecting a second electrical signal of the first detection line; wherein the first detection line is located in the array layer and at least partially surrounds the opening area; Based on the first electrical signal and the second electrical signal, it is determined whether the array layer has an abnormality.

8. The display panel detection method according to claim 7, characterized in that: The two ends of the first detection line are respectively connected to corresponding second detection lines; wherein the second detection line is in contact with the packaging layer; and the method comprises: Based on the first electrical signal and the second electrical signal of the second detection line, it is determined whether there is an abnormality in the array layer and the packaging layer.

9. The display panel detection method according to claim 7 or 8, characterized in that: The step of judging whether the array layer has an abnormality based on the first electrical signal and the second electrical signal includes: Calculating line impedance based on the first electrical signal and the second electrical signal; When the line impedance is greater than or equal to a preset threshold, it is determined that an abnormality exists.

10. A display device, characterized in that: The invention comprises an optical element and a display panel as claimed in any one of claims 1 to 6, wherein the optical element is arranged in the opening area.

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