Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises an array substrate, an opposite substrate and frame glue, wherein the array substrate and the opposite substrate are oppositely arranged; the display panel comprises a display area and a non-display area arranged on the periphery of the display area. In the non-display area, the array substrate comprises a substrate, a first metal layer, an insulating layer, a second metal layer, a passivation layer, a transparent conductive layer and an alignment film which are sequentially arranged. A plurality of via holes are formed in the passivation layer; wherein the second metal layer is arranged close to the edge of the array substrate, and the second metal layer and the first metal layer are arranged in a spaced and insulated mode through the insulating layer; at the edge position close to the array substrate, the via hole penetrates through the passivation layer and exposes part of the second metal layer; the alignment film is arranged on the side, away from the second metal layer, of the passivation layer and extends into the via hole. Through the arrangement, water vapor is consumed by the second metal layer at the edge position of the array substrate, so that the problem that metal wires of a narrow-frame or frameless display panel in related technologies are easy to corrode is solved, and the performance of the display panel is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] TFT-LCD (Thin Film Transistor Liquid Crystal Display) holds an unshakable position in the field of large, medium and small flat panel displays thanks to its following characteristics: ① low voltage and low power consumption; ② flat panel structure; ③ passive display (no glare, no eye irritation, and independent control of a dedicated light source for adjustable product brightness); ④ large amounts of displayed information; ⑤ easy colorization; ⑥ no electromagnetic radiation; ⑦ long service life. As consumer demands continue to increase, TFT-LCD products need to be continuously upgraded. For example, TFT-LCD products are moving towards narrower bezel designs. Narrow or borderless designs place even stricter demands on the high temperature and humidity testing of LCD panels.

[0003] For narrow-frame or borderless products, due to the narrow frame of the product, the alignment film spreads to the frame glue coating position and exceeds the frame glue boundary. Due to the poor bonding ability between the alignment film and the frame glue, and the alignment film's anti-moisture absorption ability is weakened under high temperature and high humidity conditions, during high temperature and high humidity testing, water vapor can easily enter the display panel along the junction of the alignment film and the frame glue, causing the metal wiring to be easily corroded, affecting the performance of the display panel. Summary of the Invention

[0004] The present application mainly provides a display panel and a display device to solve the problem in the related art that metal wiring of narrow-frame or frameless display panels is easily corroded.

[0005] To solve the above technical problems, the present application adopts a technical solution: providing a display panel, comprising an array substrate and an opposing substrate disposed opposite to each other, and a sealant connected between the array substrate and the opposing substrate; the display panel comprises a display area and a non-display area disposed periphery of the display area;

[0006] In the non-display area, the array substrate includes a substrate, a first metal layer, an insulating layer, a second metal layer, a passivation layer, a transparent conductive layer and an alignment film arranged in sequence; a plurality of via holes are provided in the passivation layer;

[0007] The second metal layer is arranged near the edge of the array substrate, and the second metal layer and the first metal layer are insulated by the insulating layer; at the edge position near the array substrate, the via hole penetrates the passivation layer and exposes part of the second metal layer; the alignment film is arranged on the side of the passivation layer away from the second metal layer and extends into the via hole.

[0008] In some embodiments, the non-display area includes a corrosion area and a non-corrosion area that are adjacent to each other, and the corrosion area is located on a side of the non-corrosion area away from the display area and is close to an edge of the array substrate;

[0009] The second metal layer is located in the corrosion area; in the corrosion area, the via hole penetrates the passivation layer and exposes a portion of the second metal layer.

[0010] In some embodiments, the transparent conductive layer is not provided in the corrosion area;

[0011] In the corrosion area, the alignment film covers the surface of the passivation layer away from the second metal layer, and the alignment film covers the sidewalls and bottom wall of the via hole and is arranged in contact with the second metal layer.

[0012] In some embodiments, the transparent conductive layer is provided on both the corrosion area and the non-corrosion area, and the transparent conductive layer covers the surface of the passivation layer away from the substrate;

[0013] In the corrosion area, the transparent conductive layer extends to cover the sidewalls and bottom wall of the via hole and is in contact with the second metal layer;

[0014] In the non-corrosion area, the via hole sequentially penetrates the passivation layer and the insulating layer and exposes a portion of the first metal layer. The transparent conductive layer extends into the via hole and is in contact with the first metal layer.

[0015] In some embodiments, the passivation layer in a portion of the corrosion area is provided with the via hole, and the passivation layer in another portion of the corrosion area is not provided with the via hole;

[0016] Alternatively, the via holes are provided in the passivation layer in all the corrosion areas.

[0017] In some embodiments, the via hole is provided in the passivation layer within a portion of the corrosion area;

[0018] The corrosion area includes a first sub-corrosion area, a second sub-corrosion area, and a third sub-corrosion area. The third sub-corrosion area is located on a side of the second sub-corrosion area away from the first sub-corrosion area, and the third sub-corrosion area is located on a side of the first sub-corrosion area away from the display area.

[0019] In the corrosion region, a plurality of the via holes are located in the second sub-corrosion region, and the first sub-corrosion region and the second sub-corrosion region are not provided with the via holes.

[0020] In some embodiments, the area of ​​the corrosion region accounts for 20%-30% of the area of ​​the non-display region;

[0021] And / or, the sealant covers an end of the second metal layer away from the display area;

[0022] And / or, the alignment film is at least partially located between the sealant and the substrate, and the alignment film is made of polyimide; and the transparent conductive layer is made of indium tin oxide.

[0023] In some embodiments, the display panel further includes a control module, the control module including a control circuit and a thin film transistor, and the first metal layer is electrically connected to the control circuit through the thin film transistor; wherein the control circuit is configured to:

[0024] In response to the display panel not being in operation, the thin film transistor is controlled to be turned on, and the first metal layer is energized.

[0025] In some embodiments, the display panel further includes a control module and a temperature sensor, the control module includes a control circuit and a thin film transistor; the first metal layer is electrically connected to the control circuit through the thin film transistor,

[0026] The temperature sensor is electrically connected to the first metal layer and the control circuit respectively; the temperature sensor is used to detect and transmit the temperature of the first metal layer to the control circuit;

[0027] The control circuit is used to:

[0028] In response to the temperature of the first metal layer being lower than a temperature threshold, the thin film transistor is controlled to be turned on, thereby energizing the first metal layer.

[0029] To solve the above technical problems, another technical solution adopted by the present application is to provide a display device, comprising:

[0030] Any display panel as described above;

[0031] The backlight module is arranged on one side of the display panel and is used to provide backlight for the display panel.

[0032] The beneficial effects of the present application are as follows: different from the prior art, the present application discloses a display panel and a display device, the display panel includes an array substrate and an opposing substrate arranged opposite to each other, and a frame glue connected between the array substrate and the opposing substrate; the display panel includes a display area and a non-display area arranged outside the display area; in the non-display area, the array substrate includes a substrate, a first metal layer, an insulating layer, a second metal layer, a passivation layer, a transparent conductive layer and an alignment film arranged in sequence; a plurality of vias are provided in the passivation layer; wherein the second metal layer is provided near the edge of the array substrate, and the second metal layer and the first metal layer are insulated by an insulating layer; at a position near the edge of the array substrate, the via penetrates the passivation layer and exposes part of the second metal layer; the alignment film is provided on a side of the passivation layer away from the second metal layer and extends into the via. By disposing a second metal layer on a side of the insulating layer of the array substrate away from the first metal layer, and positioning the second metal layer near the edge of the array substrate, partially exposing the second metal layer through a via, and extending the alignment film into the via, external water vapor, when entering the display panel through the alignment film, can react with the second metal layer at the via location to corrode the second metal layer. Furthermore, because the second metal layer and the first metal layer are insulated by the insulating layer, water vapor does not directly contact the first metal layer at the edge to corrode the first metal layer. The second metal layer at the edge of the array substrate acts as a sacrificial metal to consume water vapor, effectively preventing water vapor from corroding the first metal layer and its impact on other components within the display area. This effectively solves the problem of metal traces being easily corroded in narrow-frame or borderless display panels in related technologies, thereby improving the performance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0034] Figure 1 1 is a schematic top view of the structure of an embodiment of a display panel provided in the first embodiment of the present application;

[0035] Figure 2 yes Figure 1 A partially enlarged schematic diagram of a first embodiment of a region S of a display panel is provided;

[0036] Figure 3 yes Figure 2 A schematic diagram of the A1-A2 cross section of the display panel is provided;

[0037] Figure 4 yes Figure 2 A schematic diagram of the A3-A4 cross section of the display panel is provided;

[0038] Figure 5 yes Figure 1 A partially enlarged schematic diagram of a second embodiment of a region S of a display panel is provided;

[0039] Figure 6 yes Figure 5 A schematic cross-sectional view of a display panel B1-B2 is provided;

[0040] Figure 7 yes Figure 5 A schematic diagram of the B3-B4 cross section of the display panel is provided;

[0041] Figure 8 yes Figure 1 A partially enlarged schematic diagram of a third embodiment of a region S of a display panel is provided;

[0042] Figure 9 yes Figure 8 A schematic diagram of the C1-C2 cross section of the display panel is provided;

[0043] Figure 10 yes Figure 8 A schematic diagram of the C3-C4 cross section of the display panel is provided;

[0044] Figure 11 is a schematic structural diagram of a display panel provided in a second embodiment of the present application;

[0045] Figure 12 is a schematic structural diagram of a display panel provided in a third embodiment of the present application;

[0046] Figure 13 It is a structural diagram of an implementation of a display device provided in the fourth embodiment of the present application.

[0047] Figure Number:

[0048] 300. Display device; 200. Backlight source; 100. Display panel; 1. Array substrate; 11. Substrate; 12. First metal layer; 13. Insulating layer; 14. Second metal layer; 15. Passivation layer; 151. Via hole; 16. Transparent conductive layer; 17. Alignment film; 2. Counter substrate; 3. Frame glue; 4. Circuit board; 5. Corrosion area; 51. First sub-corrosion area; 52. Second sub-corrosion area; 53. Third sub-corrosion area; 6. Non-corrosion area; 7. Control module; 71. Control circuit; 72. Thin film transistor; 8. Temperature sensor; X. Display area; F. Non-display area; B. Bonding area. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0050] The terms "first", "second" and "third" in the embodiments of the present application are only used for descriptive purposes and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second" and "third" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally also include steps or units that are not listed, or may optionally also include other steps or units inherent to these processes, methods, products or devices.

[0051] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] See Figures 1 to 10 , Figure 1 1 is a schematic top view of a display panel according to the first embodiment of the present application. Figure 2 yes Figure 1 A partially enlarged schematic diagram of a first embodiment of a region S of a display panel is provided, Figure 3 yes Figure 2 A1-A2 cross-sectional diagram of the display panel provided, Figure 4 yes Figure 2 A3-A4 cross-sectional diagram of the display panel provided, Figure 5 yes Figure 1 A partial enlarged schematic diagram of a second embodiment of the display panel region S is provided. Figure 6 yes Figure 5 The B1-B2 cross-sectional diagram of the display panel provided, Figure 7 yes Figure 5 The B3-B4 cross-sectional diagram of the display panel provided, Figure 8 yes Figure 1 A partially enlarged schematic diagram of a third embodiment of the display panel region S is provided. Figure 9 yes Figure 8 The C1-C2 cross-sectional diagram of the display panel provided, Figure 10 yes Figure 8 A schematic diagram of the C3-C4 cross-section of the display panel is provided.

[0053] See also Figures 1 to 10 The first embodiment of the present application provides a display panel 100, which includes an array substrate 1 and an opposing substrate 2 arranged opposite to each other, and a sealant 3 connected between the array substrate 1 and the opposing substrate 2. The display panel 100 includes a display area X and a non-display area F arranged around the display area X. Specifically, as Figure 1 As shown, in one embodiment, the size of the array substrate 1 is larger than the size of the counter substrate 2, and one side of the array substrate 1 protrudes from the counter substrate 2 to form a bonding area B, which is used to bond other components such as the circuit board 4.

[0054] See also Figures 2 to 4 In the non-display area F, the array substrate 1 includes a substrate 11, a first metal layer 12, an insulating layer 13, a second metal layer 14, a passivation layer 15, a transparent conductive layer 16, and an alignment film 17, which are stacked in sequence. A plurality of vias 151 are provided in the passivation layer 15. The second metal layer 14 is provided near the edge of the array substrate 1, and the second metal layer 14 and the first metal layer 12 are insulated by an insulating layer 13 provided between the second metal layer 14 and the first metal layer 12. Near the edge of the array substrate 1, the via 151 penetrates the passivation layer 15 and exposes a portion of the second metal layer 14. The alignment film 17 is provided on the side of the passivation layer 15 away from the second metal layer 14 and extends into the via 151. In some embodiments, the first metal layer 12 can be a VCOM trace of the display panel 100.

[0055] It can be understood that by setting the second metal layer 14 on the side of the insulating layer 13 of the array substrate 1 away from the first metal layer 12, and the second metal layer 14 is set close to the edge position of the array substrate 1, a portion of the second metal layer 14 is exposed by the via 151, and the alignment film 17 is extended into the via 151. When a high temperature and high humidity test is performed or the display panel 100 is operating normally, when external water vapor enters the display panel 100 through the alignment film 17, it can react chemically or electrochemically with the second metal layer 14 at the position of the via 151, thereby corroding the second metal layer 14, and since the second metal layer 14 and the first metal layer 12 are insulated by the insulating layer 13, the water vapor will not directly contact the first metal layer 12 at the edge position and corrode the first metal layer 12. The second metal layer 14 at the edge of the array substrate 1 acts as a sacrificial metal to consume water vapor, effectively preventing water vapor from corroding the first metal layer 12 and affecting other components and metal traces within the display area X. This prevents corrosion from entering the display area X along the first metal layer 12, which could lead to metal corrosion in the display area X during high-temperature and high-humidity testing. This arrangement effectively addresses the issue of metal traces being susceptible to corrosion in narrow-frame or borderless display panels 100 in the related art, as well as the issue of image abnormalities caused by corrosion during high-temperature and high-humidity testing or during normal display operation. This improves the corrosion resistance of the narrow-frame or borderless display panel 100 and enhances the display performance of the display panel 100. Moreover, the second metal layer 14 is arranged on the top of the first metal layer 12. When performing high temperature and high humidity testing or when the display panel 100 is operating normally, the first metal layer 12 can generate heat when powered on. The heat generated by the first metal layer 12 can heat the second metal layer 14 arranged on the top of the second metal layer 14, which is beneficial to the second metal layer 14 to accelerate the consumption of water vapor and more effectively prevent water vapor from diffusing to the side of the display area X and affecting the display performance.

[0056] Specifically, in some embodiments, the alignment film 17 is at least partially located between the sealant 3 and the substrate 11, that is, the alignment film 17 extends to the coating location of the sealant 3. The material of the alignment film 17 is PI (Polyimide). The display panel 100 can be a narrow-frame or borderless display panel 100. Due to the narrow frame of the display panel 100, when the alignment film 17 is coated using a coating device with low precision, the alignment film 17 is likely to spread to the connection location between the sealant 3 and the array substrate 1 in the non-display area F and exceed the boundary of the sealant 3. In other words, the alignment film 17 is likely to spread to the side of the sealant 3 away from the display area X. The alignment film 17 is made of a low-hygroscopic material. Under high temperature and high humidity conditions, the alignment film 17's anti-hygroscopic ability is weakened. In other words, the alignment film 17 has enhanced hygroscopicity in high temperature and high humidity environments and is prone to absorbing water vapor. When the display panel 100 is subjected to a high temperature and high humidity test, water vapor is likely to come into contact with the alignment film 17 and enter the display panel 100. In the embodiment of the present application, even if water vapor enters the display panel 100 along the alignment film 17, it will only react chemically or electrochemically with the second metal layer 14 at the position of the via 151 at the edge of the non-display area F to corrode the second metal layer 14. The first metal layer 12 and the second metal layer 14 are insulated by the insulating layer 13. The first metal layer 12 and the remaining wiring in the display area X will not be corroded. By only sacrificing the second metal layer 14, the corrosion resistance of the narrow-frame or borderless display panel 100 can be improved, and the display performance of the display panel 100 can be improved.

[0057] Therefore, for a display panel 100 with a narrow frame or no frame, by setting the array substrate 1 to the above-mentioned structure, the alignment film 17 can be coated with a low-precision coating equipment. Even if the alignment film 17 spreads to the coating position of the frame glue 3, it will not have a significant impact on the corrosion resistance of the display panel 100 with a narrow frame or no frame. The precision requirements of the coating equipment for the alignment film 17 can be effectively reduced, and the production cost can be reduced. Optimization and improvement have been made at the design level, solving the limitation of large fluctuations in the coating of the alignment film 17 for narrow-frame or no-frame products using the PIInject equipment, and realizing that the alignment film 17 can be coated on narrow-frame or no-frame products using the PIInject equipment.

[0058] Specifically, in some embodiments, other structures such as a driving circuit layer (not shown) and a thin film transistor layer (not shown) are further provided in the display area X of the array substrate 1. The driving circuit layer and the thin film transistor layer both include other metal wirings. By providing a second metal layer 14 at the edge of the non-display area F of the array substrate 1, the second metal layer 14 is sacrificed to protect the first metal layer 12 from corrosion. At the same time, the remaining metal wirings inside other structures such as the driving circuit layer and the thin film transistor layer in the display area X can also be effectively protected from corrosion, which is beneficial to improving the display performance of the display panel 100.

[0059] Specifically, in some embodiments, see Figure 2 、 Figure 5 and Figure 8 The non-display area F of the display panel 100 includes an adjacent corrosion area 5 and a non-corrosion area 6. The corrosion area 5 is located on the side of the non-corrosion area 6 away from the display area X, and the corrosion area 5 is located near the edge of the array substrate 1. The second metal layer 14 is located within the corrosion area 5. In the corrosion area 5, a via 151 penetrates the passivation layer 15 and exposes a portion of the second metal layer 14, so that the alignment film 17 can extend to the via 151. At the via 151 on the top of the second metal layer 14 in the corrosion area 5, water vapor entering the via 151 through the alignment film 17 can react with the second metal layer 14 and be consumed.

[0060] In some specific embodiments, the second metal layer 14 is only disposed in the corrosion zone 5, and the second metal layer 14 is not disposed in the non-corrosion zone 6. The reaction between water vapor and the second metal layer 14 occurs in the corrosion zone 5. Since the corrosion zone 5 is disposed away from the display area X, the water vapor can be consumed in the corrosion zone 5 away from the display area X, preventing the water vapor from reacting with the first metal layer 12 in the non-corrosion zone 6 and corroding the normal metal traces of the display panel 100. This more effectively prevents water vapor from entering the display area X side, which is beneficial for improving the corrosion resistance of the display panel 100. In other embodiments, a portion of the second metal layer 14 can also be disposed near the edge of the non-corrosion zone 6 near the corrosion zone 5 to further consume water vapor and protect the first metal layer 12 from corrosion. The specific configuration can be as needed.

[0061] In some embodiments, see Figures 2 to 4The etching region 5 of the array substrate 1 does not include a transparent conductive layer 16. Specifically, the etching region 5 includes only a substrate 11, a first metal layer 12, an insulating layer 13, a second metal layer 14, a passivation layer 15, and an alignment film 17, which are stacked in sequence. Specifically, the first metal layer 12 includes multiple interconnected metal traces, and the second metal layer 14 also includes multiple metal traces. The metal traces of the second metal layer 14 in the etching region 5 are located on top of the metal traces of the first metal layer 12 and are insulated by the insulating layer 13. In the etching region 5, the passivation layer 15 covers the surface of the second metal layer 14 facing away from the substrate 11. Vias 151 are provided corresponding to the locations of the metal traces. Vias 151 penetrate the passivation layer 15 and expose the second metal layer 14. The alignment film 17 entirely covers the surface of the passivation layer 15 facing away from the substrate 11, extending to cover the sidewalls and bottom of the vias 151 and contacting the second metal layer 14. In this embodiment, since the transparent conductive layer 16 is not provided in the corrosion area 5, the alignment film 17 is in direct contact with the second metal layer 14 at the position of the via 151. Therefore, at the position of the via 151 in the corrosion area 5, the second metal layer 14 reacts chemically with the water vapor, and most of the water vapor is consumed by the corrosion of the second metal layer 14 to avoid the water vapor from contacting the first metal layer 12 and corroding the first metal layer 12, thereby improving the corrosion resistance of the display panel 100.

[0062] In this embodiment, if Figures 2 to 4 As shown, a transparent conductive layer 16 is provided in the non-corrosion area 6, but a second metal layer 14 is not provided. In some embodiments, in the non-corrosion area 6, a via 151 sequentially penetrates the passivation layer 15 and the insulating layer 13, exposing a portion of the first metal layer 12. The transparent conductive layer 16 covers the surface of the passivation layer 15 away from the substrate 11 and extends into the via 151 to make contact and electrical connection with the first metal layer 12. The alignment film 17 directly covers the surface of the transparent conductive layer 16 away from the substrate 11. Specifically, the material of the transparent conductive layer 16 can be ITO (indium tin oxide). The electrical connection between the transparent conductive layer 16 and the first metal layer 12 facilitates the driving and control of the display panel 100 to achieve the image display function. Since the second metal layer 14 is provided in the corrosion area 5, the corrosion reaction of the second metal layer 14 in the corrosion area 5 consumes water vapor, and the water vapor does not enter the non-corrosion area 6 and corrode the first metal layer 12.

[0063] In one embodiment, Figure 2 and Figure 3As shown, the via holes 151 may not be provided in the passivation layer 15 in the non-corrosion area 6 near the corrosion area 5. The via holes 151 are only provided in the passivation layer 15 in the non-corrosion area 6 away from the corrosion area 5. This can further avoid the problem that the via holes 151 are provided near the corrosion area 5, which would cause water vapor to directly contact and react with the first metal layer 12 at the location of the via holes 151, thereby causing corrosion of the first metal layer 12. This arrangement can further prevent the corrosion of the first metal layer 12, thereby improving the corrosion performance of the display panel 100.

[0064] In other embodiments, see Figures 5 to 7 , the corrosion area 5 and the non-corrosion area 6 of the array substrate 1 are both provided with a transparent conductive layer 16, and the material of the transparent conductive layer 16 can be ITO. Figure 6 and Figure 7 As shown, a transparent conductive layer 16 covers the surface of the passivation layer 15 away from the substrate 11, and an alignment film 17 covers the surface of the transparent conductive layer 16 away from the substrate 11. Specifically, within the corrosion region 5, the array substrate 1 includes a substrate 11, a first metal layer 12, an insulating layer 13, a second metal layer 14, a passivation layer 15, a transparent conductive layer 16, and an alignment film 17, which are stacked in sequence. Within the non-corrosion region 6, the array substrate 1 includes a substrate 11, a first metal layer 12, an insulating layer 13, a passivation layer 15, a transparent conductive layer 16, and an alignment film 17, which are stacked in sequence. The second metal layer 14 is only disposed within the corrosion region 5 and is not disposed within the non-corrosion region 6.

[0065] For details, see Figures 5 to 7 In the corrosion area 5, the via 151 penetrates the passivation layer 15 and exposes a portion of the second metal layer 14. The transparent conductive layer 16 extends into the via 151 and covers the sidewalls and bottom walls of the via 151. The transparent conductive layer 16 is arranged in contact with the second metal layer 14 in the via 151. The alignment film 17 covers the surface of the transparent conductive layer 16 away from the substrate 11 and extends into the via 151. When external water vapor enters the display panel 100 through the alignment film 17, since the alignment film 17 extends into the via 151 and the transparent conductive layer 16 is arranged in contact with the second metal layer 14, the water vapor in the alignment film 17 contacts the transparent conductive layer 16 and the second metal layer 14 and an electrochemical reaction occurs, causing the second metal layer 14 to be electrochemically corroded at the position of the via 151 in the corrosion area 5. The water vapor is consumed by sacrificing the second metal layer 14, preventing the water vapor from entering the non-corrosion area 6 or the display area X and corroding the first metal layer 12 or the remaining metal wiring in the display area X, thereby improving the corrosion resistance of the display panel 100.

[0066] In the non-corrosion region 6, the second metal layer 14 is not provided. Vias 151 sequentially penetrate the passivation layer 15 and the insulating layer 13, exposing a portion of the first metal layer 12. The transparent conductive layer 16 extends into the via 151 and is disposed in contact with the first metal layer 12. The alignment film 17 directly covers the surface of the transparent conductive layer 16 away from the substrate 11. The electrical connection between the transparent conductive layer 16 and the first metal layer 12 facilitates the driving and control of the display panel 100 to achieve the image display function. Because the second metal layer 14 is only provided in the corrosion region 5, corrosion occurs only in the corrosion region 5. After the second metal layer 14 undergoes electrochemical corrosion in the corrosion region 5 and consumes water vapor, the water vapor will not enter the non-corrosion region 6 and corrode the first metal layer 12.

[0067] See also Figure 2 and Figure 5 In some embodiments, vias 151 are provided in the passivation layer 15 in all corrosion areas 5. The vias 151 in the passivation layer 15 in the corrosion area 5 are provided corresponding to the metal routing positions of the second metal layer 14, so that water vapor entering the display panel 100 through the alignment film 17 can react chemically or electrochemically with the second metal layer 14 at the positions of the multiple vias 151 in the corrosion area 5, thereby accelerating the consumption of water vapor and improving the corrosion resistance of the display panel 100.

[0068] See also Figure 8 In other embodiments, only a portion of the passivation layer 15 in the corrosion region 5 is provided with a via 151, and another portion of the passivation layer 15 in the corrosion region 5 is not provided with a via 151. Figure 8 As shown, in one specific embodiment, the corrosion region 5 includes a first sub-corrosion region 51, a second sub-corrosion region 52, and a third sub-corrosion region 53, which are sequentially arranged. The third sub-corrosion region 53 is located on a side of the second sub-corrosion region 52 away from the first sub-corrosion region 51, and the third sub-corrosion region 53 is located on a side of the first sub-corrosion region 51 away from the display area X. That is, the third sub-corrosion region 53 is located on the outermost side of the array substrate 1 and is located closest to the edge of the array substrate 1. The second metal layer 14 is disposed in each of the first sub-corrosion region 51, the second sub-corrosion region 52, and the third sub-corrosion region 53.

[0069] In one embodiment, see Figures 8 to 10In the corrosion area 5 , a plurality of via holes 151 are only provided in the passivation layer 15 located in the second sub-corrosion area 52 , and no via holes 151 are provided in the passivation layer 15 in the first sub-corrosion area 51 and the second sub-corrosion area 52 . It can be understood that by dividing the corrosion zone 5 into a first sub-corrosion zone 51, a second sub-corrosion zone 52, and a third sub-corrosion zone 53, and disposing the via 151 in the corrosion zone 5 in the passivation layer 15 in the second sub-corrosion zone 52, when water vapor enters the display panel 100 through the alignment film 17, the water vapor in the alignment film 17 can chemically or electrochemically corrode the second metal layer 14 at the location of the via 151 in the second sub-corrosion zone 52, thereby consuming the water vapor. At the same time, the second metal layer 14 is provided in both the first sub-corrosion zone 51 and the third sub-corrosion zone 53. After the second metal layer 14 in the second sub-corrosion zone 52 corrodes, the corrosion of the second metal layer 14 can extend from the second sub-corrosion zone 52 to the first sub-corrosion zone 51 and the third sub-corrosion zone 53, respectively. This helps to increase the corrosion path between the second metal layer 14 and water vapor, thereby facilitating the consumption of more water vapor and more effectively improving the corrosion resistance of the display panel 100.

[0070] See also Figure 2 、 Figure 5 and Figure 8 In some embodiments, the area of ​​the corrosion region 5 accounts for 20%-30% of the area of ​​the non-display region F. For example, the area of ​​the corrosion region 5 can account for any value such as 20%, 23%, 25%, 28%, or 30% of the area of ​​the non-display region F. For example, in some embodiments, Figure 2 and Figure 5 As shown, the area of ​​the corrosion region 5 may account for 20% of the area of ​​the non-display region F, or, in some embodiments, as shown in FIG. Figure 8 As shown, the area of ​​the corrosion region 5 may account for 30% of the area of ​​the non-display region F. Figure 8 The area of ​​the corrosion region 5 of the display panel 100 is larger than Figure 2 and Figure 5 The area of ​​the corrosion zone 5 of the display panel 100 is shown. It can be understood that within the above numerical range, the larger the area of ​​the corrosion zone 5, that is, the larger the area of ​​the second metal layer 14, the stronger the second metal layer 14's ability to consume water vapor is, which is more conducive to improving the corrosion resistance of the display panel 100. By setting the area of ​​the corrosion zone 5 within the above range, the water vapor can be consumed by the second metal layer 14, thereby preventing the water vapor from reacting with the first metal layer 12 and corroding the first metal layer 12. At the same time, sufficient space is left for the arrangement of other metal traces and components in the non-display area F, without affecting the arrangement of other metal traces and components in the non-display area F, thereby ensuring the performance of the display panel 100.

[0071] In some embodiments, as Figure 2As shown, the sealant 3 can cover the end of the second metal layer 14 away from the display area X, that is, the second metal layer 14 is entirely located on the side of the sealant 3 close to the display area X. It can be understood that the sealant 3 itself can play a role in blocking water vapor from entering the display panel 100. By covering the end of the second metal layer 14 away from the display area X by the sealant 3, the second metal layer 14 can be prevented from being located outside the sealant 3 and directly contacting external water vapor and corroding, resulting in the second metal layer 14 being wasted and affecting the corrosion resistance of the display panel 100. On the basis of using the sealant 3 to block water vapor once, the second metal layer 14 consumes water vapor that enters the display panel 100 through the sealant 3 for a second time, so as to more effectively prevent water vapor from corroding the first metal layer 12 and the metal wiring in the display area X, and more effectively improve the corrosion resistance of the display panel 100.

[0072] Specifically, in some embodiments, the sealant 3 is located within the non-display region F and connects the counter substrate 2 and the array substrate 1. Gold balls (not shown) are disposed within the sealant 3. The ends of the gold balls within the sealant 3 pierce the alignment films 17 of the counter substrate 2 and the array substrate 1, respectively, thereby electrically connecting to the transparent conductive layers 16 of the counter substrate 2 and the array substrate 1, respectively. This achieves electrical connection between the transparent conductive layers 16 of the counter substrate 2 and the array substrate 1, thereby facilitating driving the display panel 100 to achieve image display functionality. Because the second metal layer 14 is disposed within the corrosion region 5, while the second metal layer 14 is not disposed within the non-corrosion region 6, the alignment film 17 in the corrosion region 5 is distal to the surface of the substrate 11, while the alignment film 17 in the non-corrosion region 6 is distal to the surface of the substrate 11 and proximate to the counter substrate 2. That is, the height of the alignment film 17 in the corrosion region 5 distal to the surface of the substrate 11 is higher than the height of the alignment film 17 in the non-corrosion region 6 distal to the surface of the substrate 11. By setting a second metal layer 14 in the corrosion area 5 and the frame glue 3 covering the second metal layer 14 in the corrosion area 5, the two ends of the gold ball in the frame glue 3 can be more easily penetrated into the alignment film 17 of the counter substrate 2 and the array substrate 1, thereby making it easier to achieve electrical connection between the counter substrate 2 and the transparent conductive layer 16 of the array substrate 1, thereby improving the performance of the display panel 100.

[0073] In other embodiments, the second metal layer 14 may also be partially located outside the frame glue 3 and partially located inside the frame glue 3, that is, the frame glue 3 may not cover the end of the second metal layer 14 away from the display area X. By setting the second metal layer 14, water vapor can still be consumed and the corrosion resistance of the display panel 100 can be improved. The specific setting can be based on needs.

[0074] See Figures 11 to 12 , Figure 11 is a schematic structural diagram of a display panel provided in the second embodiment of the present application, Figure 12 3 is a schematic structural diagram of a display panel provided in the third embodiment of the present application.

[0075] See also Figure 11 In some embodiments, the display panel 100 further includes a control module 7, and the control module 7 includes a control circuit 71 and a thin film transistor 72 (TFT). The first metal layer 12 is electrically connected to the control circuit 71 through the thin film transistor 72. Specifically, the control module 7 can be provided on the array substrate 1, or can be provided outside the array substrate 1. Specifically, the control circuit 71 is used to: in response to the display panel 100 not working, control the thin film transistor 72 to turn on, and energize the first metal layer 12. Specifically, the display panel 100 not working here can specifically refer to the display panel 100 not displaying, that is, the display panel 100 does not display an image. For example, the display panel 100 can be a display such as a television or a computer. When the television or computer is plugged in but not turned on, or when the computer is turned on and the screen is off or in sleep mode, no image is displayed. The above scenarios can all be regarded as the display panel 100 not working.

[0076] It can be understood that applying electricity to the first metal layer 12 can cause the first metal layer 12 to generate heat. Since the second metal layer 14 is provided on the top of the first metal layer 12 in the corrosion area 5 of the display panel 100, the heat generated by applying electricity to the first metal layer 12 can heat the second metal layer 14, thereby making the second metal layer 14 more likely to react with water vapor and consume more water vapor, thereby accelerating the consumption rate of water vapor. In this embodiment, an independent control module 7 is provided in the display panel 100, so that in response to the display panel 100 not working (not displaying an image), the control circuit 71 controls the thin film transistor 72 to turn on, thereby electrically connecting the first metal layer 12 to the control circuit 71, and the control circuit 71 energizes the first metal layer 12, so that the first metal layer 12 can still generate heat when the display panel 100 is not working, and the heat generated by the power supply of the first metal layer 12 heats the second metal layer 14, accelerates the reaction of the second metal layer 14 with water vapor, and increases the consumption rate of water vapor. Moreover, water vapor can still be consumed when the display panel 100 is not working, thereby preventing water vapor from entering the display panel 100 and corroding the first metal layer 12 and the remaining metal wirings in the display area X when the display panel 100 is not working, thereby more effectively improving the display performance of the display panel 100.

[0077] Specifically, the control module 7 can be set independently of the driving circuit layer of the display panel 100. The control module 7 is only used to control the first metal layer 12. The control of the first metal layer 12 by the control module 7 will not affect the normal operation of the display panel 100, nor will it affect the driving control of the driving circuit layer of the display panel 100 or the remaining metal wirings, and will not affect the normal performance of the display panel 100.

[0078] In one specific embodiment, when the display panel 100 is operating normally (displaying an image), since the first metal layer 12 is in an energized state, the first metal layer 12 itself can generate heat to heat the second metal layer 14. Therefore, the control circuit 71 of the control module 7 can be used to control the thin film transistor 72 to turn off in response to the operation of the display panel 100, thereby disconnecting the path between the control circuit 71 and the first metal layer 12 to avoid affecting the potential of the first metal layer 12 and, in turn, the normal display function of the display panel 100. In other words, the control module 7 is only used to energize the first metal layer 12 when the display panel 100 is not operating. When the display panel 100 is operating normally, the control module 7 does not energize the first metal layer 12.

[0079] In some embodiments, see Figure 12 The display panel 100 also includes a control module 7 and a temperature sensor 8. The control module 7 includes a control circuit 71 and a thin film transistor 72. The first metal layer 12 is electrically connected to the control circuit 71 through the thin film transistor 72. The temperature sensor 8 is electrically connected to the first metal layer 12 and the control circuit 71, respectively. The temperature sensor 8 is used to detect and transmit the temperature of the first metal layer 12 to the control circuit 71. Specifically, the temperature sensor 8 can be arranged on the array substrate 1 as a part of the array substrate 1, or can be arranged outside the array substrate 1. The control circuit 71 is used to: in response to the temperature of the first metal layer 12 being lower than the temperature threshold, control the thin film transistor 72 to turn on and energize the first metal layer 12. Specifically, the temperature threshold can be a certain range of values, or it can also be a certain specific value. The temperature threshold can be a temperature at which it is difficult for the first metal layer 12 to heat the second metal layer 14, and can be set according to needs or experience.

[0080] It can be understood that by providing a temperature sensor 8 in the display panel 100, and the temperature sensor 8 is electrically connected to the first metal layer 12 and the control circuit 71 respectively, the temperature sensor 8 can detect the temperature of the first metal layer 12 and transmit the detected temperature to the control circuit 71. The control circuit 71 controls the thin film transistor 72 to turn on when the temperature of the first metal layer 12 is lower than the temperature threshold, thereby energizing the first metal layer 12, so that the first metal layer 12 can generate heat. Furthermore, when the temperature of the first metal layer 12 is lower than the temperature threshold, that is, when it is difficult to heat the second metal layer 14, the control circuit 71 can still energize the first metal layer 12 to regenerate heat and reheat the second metal layer 14. In this way, it can be ensured that the temperature of the first metal layer 12 can always heat the second metal layer 14, thereby ensuring that water vapor can always react with the second metal layer 14 more quickly, ensuring that the second metal layer 14 can always consume water vapor at a faster rate, and more effectively preventing water vapor from corroding the first metal layer 12 or other metal traces in the display area X.

[0081] For example, when the display panel 100 is not working (not displaying the picture), for example, when the display panel 100 is plugged in but not turned on, or when the display panel 100 is turned on and the screen is off or in sleep mode, the temperature inside the display panel 100 is lower than the temperature when it is in working mode (displaying the picture), and the temperature of the first metal layer 12 is difficult to better heat the second metal layer 14, thereby failing to consume water vapor more efficiently. By setting a temperature sensor 8 to detect the temperature of the first metal layer 12, when the display panel 100 is not working and the temperature of the first metal layer 12 is lower than the temperature threshold, the control circuit 71 can energize the first metal layer 12 and thereby heat the second metal layer 14. Alternatively, when the display panel 100 is used in a low temperature environment, for example, in winter, outdoors or in a low temperature environment such as Antarctica, the temperature of the display panel 100 is low, and the temperature of the first metal layer 12 is also low. The temperature of the first metal layer 12 is difficult to better heat the second metal layer 14, and thus cannot consume water vapor more efficiently. By setting a temperature sensor 8 to detect the temperature of the first metal layer 12, the control circuit 71 can power on the first metal layer 12 when the temperature of the first metal layer 12 is lower than the temperature threshold, so that the first metal layer 12 generates heat, and then heats the second metal layer 14, so as to increase the water vapor consumption rate and improve the corrosion resistance of the display panel 100 in the above-mentioned low temperature environment.

[0082] Specifically, the temperature sensor 8 can detect the temperature of the first metal layer 12 in real time and transmit the detection result to the control circuit 71 in real time; alternatively, the temperature sensor 8 can also periodically detect the temperature of the first metal layer 12. For example, a specific time period can be set, such as 1 minute, 5 minutes, or 10 minutes. During each time period, the temperature sensor 8 detects the temperature of the first metal layer 12 once and transmits the detection result to the control circuit 71. The control circuit 71 receives the temperature value detected by the temperature sensor 8, determines whether the temperature of the first metal layer 12 is lower than the temperature threshold, and in response to the temperature of the first metal layer 12 being lower than the temperature threshold, controls the thin film transistor 72 to turn on, thereby energizing the first metal layer 12. Specifically, the specific value of the time period can be set according to actual needs or experience, and this application does not limit this.

[0083] In other embodiments, the temperature sensor 8 may not be directly electrically connected to the first metal layer 12, but may be electrically connected only to the control circuit 71. The temperature sensor 8 may be disposed on the array substrate 1 or outside the array substrate 1, for example, on the opposing substrate 2, or at any position within the internal space enclosed by the sealant 3, or outside the sealant 3. The temperature sensor 8 may be used to detect the ambient temperature, for example, to detect the temperature within the internal space enclosed by the sealant 3, or to detect the temperature of the space in which the display panel 100 is located, or to detect the temperature of the array substrate 1 and transmit the detected temperature to the control circuit 71. When the temperature sensor 8 detects that the above-mentioned ambient temperature or the temperature of the array substrate 1 is lower than the temperature threshold, for example, when the display panel 100 is used in a cold environment such as winter, outdoors or Antarctica, the ambient temperature is low and the temperature of the array substrate 1 is also relatively low. The control circuit 71 controls the thin film transistor 72 to turn on, and the first metal layer 12 is energized. The heat generated by the first metal layer 12 heats the second metal layer 14, so that even when used in a low temperature environment, the first metal layer 12 can still heat the second metal layer 14, the second metal layer 14 of the display panel 100 can still react efficiently with water vapor, and the display panel 100 can still have strong corrosion resistance.

[0084] In other embodiments, the first metal layer 12 can be divided into two parts, one of which is located in the corrosion region 5 and the other in the non-corrosion region 6. The first metal layer 12 in the non-corrosion region 6 is not electrically connected to the first metal layer 12 in the corrosion region 5. Specifically, the first metal layer 12 in the non-corrosion region 6 serves as the VCOM line of the display panel 100, while the first metal layer 12 in the corrosion region 5 can be a sacrificial metal. The second metal layer 14 can be provided only on top of the first metal layer 12 in the corrosion region 5. Specifically, the first metal layer 12 and the second metal layer 14 in the corrosion region 5 can be separated and insulated by an insulating layer 13. The display panel 100 can be provided with a control module 7, which includes a control circuit 71 and a thin film transistor 72. The first metal layer 12 in the corrosion region 5 is electrically connected to the control circuit 71 via the thin film transistor 72, and the first metal layer 12 in the non-corrosion region 6 is not electrically connected to the control module 7. The control circuit 71 can be used to control the thin film transistor 72 to be turned on, both when the display panel 100 is operating and when it is not operating, so as to continuously energize the first metal layer 12 located in the corrosion region 5, thereby enabling the first metal layer 12 in the corrosion region 5 to continuously generate heat, thereby continuously heating the second metal layer 14 in the corrosion region 5. This, in turn, allows the second metal layer 14 to always react efficiently with water vapor, thereby increasing the rate of water vapor consumption. Furthermore, since the first metal layer 12 in the non-corrosion region 6 and the first metal layer 12 in the corrosion region 5 are not electrically connected, even when the display panel 100 is operating normally, energizing the first metal layer 12 in the corrosion region 5 will not affect the potential of the first metal layer 12 in the non-corrosion region 6, nor will it affect the normal display function of the display panel 100. This improves the corrosion resistance of the display panel 100 while also ensuring the display performance of the display panel 100.

[0085] See Figure 13 , Figure 13 It is a structural diagram of an implementation of a display device provided in the fourth embodiment of the present application.

[0086] See also Figure 13 The fourth embodiment of the present application provides a display device 300, which includes a display panel 100 and a backlight source 200. The backlight source 200 is arranged on one side of the display panel 100. The backlight source 200 is used to provide backlight for the display panel 100 so that the display panel 100 can realize the picture display function.

[0087] Specifically, the specific structure of the display panel 100 can be any one of the display panels 100 in the above embodiments, and can be designed or selected as needed.

[0088] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel comprising an array substrate and an opposing substrate disposed opposite to each other, and a sealant connected between the array substrate and the opposing substrate; the display panel comprising a display area and a non-display area disposed outside the display area; characterized in that: In the non-display area, the array substrate includes a substrate, a first metal layer, an insulating layer, a second metal layer, a passivation layer, a transparent conductive layer and an alignment film arranged in sequence; a plurality of via holes are provided in the passivation layer; The second metal layer is arranged near the edge of the array substrate, and the second metal layer and the first metal layer are insulated by the insulating layer; at the edge position near the array substrate, the via hole penetrates the passivation layer and exposes part of the second metal layer; the alignment film is arranged on the side of the passivation layer away from the second metal layer and extends into the via hole.

2. The display panel according to claim 1, wherein: The non-display area includes a corrosion area and a non-corrosion area that are adjacent to each other, wherein the corrosion area is located on a side of the non-corrosion area away from the display area and is close to an edge of the array substrate; The second metal layer is located in the corrosion area; in the corrosion area, the via hole penetrates the passivation layer and exposes a portion of the second metal layer.

3. The display panel according to claim 2, wherein: The transparent conductive layer is not provided in the corrosion area; In the corrosion area, the alignment film covers the surface of the passivation layer away from the second metal layer, and the alignment film covers the sidewalls and bottom wall of the via hole and is arranged in contact with the second metal layer.

4. The display panel according to claim 2, wherein: The transparent conductive layer is provided on both the corrosion area and the non-corrosion area, and the transparent conductive layer covers the surface of the passivation layer away from the substrate; In the corrosion area, the transparent conductive layer extends to cover the sidewalls and bottom wall of the via hole and is in contact with the second metal layer; In the non-corrosion area, the via hole sequentially penetrates the passivation layer and the insulating layer and exposes a portion of the first metal layer. The transparent conductive layer extends into the via hole and is in contact with the first metal layer.

5. The display panel according to any one of claims 2 to 4, characterized in that: The passivation layer in a portion of the corrosion area is provided with the via hole, and the passivation layer in another portion of the corrosion area is not provided with the via hole; Alternatively, the via holes are provided in the passivation layer in all the corrosion areas.

6. The display panel according to claim 5, wherein: The via hole is provided in the passivation layer within a portion of the corrosion area; The corrosion area includes a first sub-corrosion area, a second sub-corrosion area, and a third sub-corrosion area. The third sub-corrosion area is located on a side of the second sub-corrosion area away from the first sub-corrosion area, and the third sub-corrosion area is located on a side of the first sub-corrosion area away from the display area. In the corrosion region, a plurality of the via holes are located in the second sub-corrosion region, and the first sub-corrosion region and the second sub-corrosion region are not provided with the via holes.

7. The display panel according to claim 2, wherein: The area of ​​the corrosion area accounts for 20%-30% of the area of ​​the non-display area; And / or, the sealant covers an end of the second metal layer away from the display area; And / or, the alignment film is at least partially located between the sealant and the substrate, and the alignment film is made of polyimide; and the transparent conductive layer is made of indium tin oxide.

8. The display panel according to claim 1, wherein: The display panel further includes a control module, which includes a control circuit and a thin film transistor. The first metal layer is electrically connected to the control circuit through the thin film transistor. The control circuit is configured to: In response to the display panel not being in operation, the thin film transistor is controlled to be turned on, and the first metal layer is energized.

9. The display panel according to claim 1, wherein: The display panel further includes a control module and a temperature sensor. The control module includes a control circuit and a thin film transistor. The first metal layer is electrically connected to the control circuit through the thin film transistor. The temperature sensor is electrically connected to the first metal layer and the control circuit respectively; the temperature sensor is used to detect and transmit the temperature of the first metal layer to the control circuit; The control circuit is used to: In response to the temperature of the first metal layer being lower than a temperature threshold, the thin film transistor is controlled to be turned on, thereby energizing the first metal layer.

10. A display device, characterized in that: include: The display panel according to any one of claims 1 to 9; The backlight module is arranged on one side of the display panel and is used to provide backlight for the display panel.

Images