Display panel and display device

Abstract

Embodiments of the present application provide a display panel and a display device, and relate to the display field, and aim to improve the electrostatic protection capability of the display panel. The display panel comprises a display substrate, a cover plate located on the side of the display substrate facing the light-out surface of the display panel, a first coating layer located on the side of the cover plate away from the display substrate, and a second coating layer at least partially located on the side of the cover plate close to the display substrate, and the surface resistance of the second coating layer is greater than that of the first coating layer.

Description

TECHNICAL FIELD

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

[0002] At present, the cover plate in the display panel is mostly glass cover plate, but such cover plate is easy to generate static electricity under rubbing condition, and the anti-static propagation ability is also weak, which leads to that a large amount of static electricity generated by rubbing can be further transmitted to the inside of the display panel through the cover plate, and influences the electrical characteristics of the electronic devices in the display panel, so that the electrical properties are offset.

[0003] For example, after the rubbing static electricity enters the gate insulating layer in the panel, the defects in the gate insulating layer will increase, the threshold voltage of the transistor will be positively biased, and then the current flowing into the light emitting element will be too large, the light emitting brightness of the light emitting element will be too high, and the display panel will appear the phenomenon of uneven display. SUMMARY

[0004] Therefore, the embodiments of the present application provide a display panel and a display device to improve the static electricity protection ability of the display panel.

[0005] In one aspect, the embodiments of the present application provide a display panel, comprising:

[0006] a display substrate;

[0007] a cover plate located on the side of the display substrate facing the light emitting surface of the display panel;

[0008] a first coating layer located on the side of the cover plate away from the display substrate;

[0009] a second coating layer at least partially located on the side of the cover plate close to the display substrate, and the surface resistance of the second coating layer is greater than that of the first coating layer

[0010] In another aspect, the embodiments of the present application provide a display device comprising the above display panel.

[0011] One of the above technical solutions has the following beneficial effects:

[0012] The inventor found in the research process that when the surface resistance of the coating layer used for static electricity protection is different, the inhibition effect of the coating layer on static electricity is different. When the surface resistance of the coating layer is low, the coating layer can make the static electricity quickly spread out, and then it is more easy and fast to dissipate in the water vapor in the air, avoiding the accumulation of static electricity on the surface. When the surface resistance of the coating layer is high, the coating layer can act as a high resistance structure to block the transmission of static electricity and weaken the transmission ability of static electricity.

[0013] By comprehensively considering the inhibiting effects of coatings with different surface resistances on static electricity in different aspects, the embodiment of the present application sets a first coating with low resistance and a second coating with high resistance on the outer and inner sides of the cover plate respectively. By setting the first coating with low surface resistance on the outer side (the side close to the light-emitting surface of the display panel) of the cover plate, the static charge generated by friction can be accelerated to dissipate by the first coating, so as to reduce the friction static charge accumulated on the outer surface of the display panel. By further setting the second coating with high surface resistance on the inner side (the side away from the light-emitting surface of the display panel) of the cover plate, the transmission of the friction static charge can be further blocked by the second coating to avoid the friction static charge from further transmitting to the inside of the display substrate after entering the cover plate.

[0014] Compared with forming a single static protection layer on one side of the cover plate, the embodiment of the present application can simultaneously achieve the effects of reducing the accumulation of static charge on the outer side of the cover plate and blocking the transmission of static electricity on the inner side of the cover plate based on the cooperation of the first coating and the second coating, so as to produce a certain inhibiting effect on static charge on the inner and outer sides of the cover plate, thereby significantly improving the static protection capability of the display panel. In this way, the friction static charge transmitted to the display substrate can be significantly reduced, the influence of the friction static charge on the electrical characteristics of the electronic devices in the display substrate can be avoided, and the display unevenness of the display panel can be effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 A cross-sectional schematic view of the display panel provided by the embodiment of the present application;

[0017] Figure 2 A cross-sectional schematic view of the display panel provided by the embodiment of the present application;

[0018] Figure 3 A comparative schematic view of the transmission of static electricity provided by the embodiment of the present application;

[0019] Figure 4 Another cross-sectional schematic view of the display panel provided by the embodiment of the present application;

[0020] Figure 5 A top view of the cover plate, the ink layer and the second coating provided by the embodiment of the present application;

[0021] Figure 6 for Figure 5 A sectional view along the A1-A2 direction;

[0022] Figure 7 for Figure 5 Another sectional view along the A1-A2 direction;

[0023] Figure 8 A top view of the cover plate and the second coating provided in an embodiment of the present invention;

[0024] Figure 9 Another top view of the cover plate and the second coating provided in an embodiment of the present invention;

[0025] Figure 10 for Figure 9 A sectional view along the B1-B2 direction;

[0026] Figure 11 Another top view of the cover plate and the second coating provided in an embodiment of the present invention;

[0027] Figure 12 for Figure 11 A sectional view along the C1-C2 direction;

[0028] Figure 13 Another top view of the cover plate and the second coating provided in an embodiment of the present invention;

[0029] Figure 14 for Figure 13 A sectional view along the D1-D2 direction;

[0030] Figure 15 This is another cross-sectional schematic diagram of the display panel provided in an embodiment of the present invention;

[0031] Figure 16 This is another cross-sectional schematic diagram of the display panel provided in an embodiment of the present invention;

[0032] Figure 17 This is another cross-sectional schematic diagram of the display panel provided in an embodiment of the present invention;

[0033] Figure 18 This is another cross-sectional schematic diagram of the display panel provided in an embodiment of the present invention;

[0034] Figure 19 This is another cross-sectional schematic diagram of the display panel provided in an embodiment of the present invention;

[0035] Figure 20 This is a schematic diagram of a display device provided in an embodiment of the present invention.

Detailed Implementation Methods

[0036] In order to better understand the technical solutions of the present application, the embodiments of the present application are described in detail below with reference to the drawings.

[0037] It should be clear that the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0039] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0040] The embodiments of the present application provide a display panel, such as Figure 1 as shown, Figure 1 A cross-sectional schematic view of the display panel provided by the embodiments of the present application, the display panel includes a display substrate 1, a cover plate 2, a first coating layer 3 and a second coating layer 4. Wherein, the cover plate 2 is located on the side of the display substrate 1 facing the light-emitting surface of the display panel, which can be a glass cover plate, the first coating layer 3 is located on the side of the cover plate 2 away from the display substrate 1, at least part of the second coating layer 4 is located on the side of the cover plate 2 close to the display substrate 1, and the surface resistance of the second coating layer 4 is greater than that of the first coating layer 3, that is, the first coating layer 3 is a low-resistance coating layer, and the second coating layer 4 is a high-resistance coating layer.

[0041] More specifically, in one setting mode, as shown in Figure 2 as shown, Figure 2 A cross-sectional schematic view of the display panel provided by the embodiments of the present application, the display panel further includes an optical glue 5 and a polarizer 6, the optical glue 5 and the polarizer 6 are located between the display substrate 1 and the cover plate 2, and the optical glue 5 is located between the polarizer 6 and the cover plate 2. The first coating layer 3 can be located on the surface of the cover plate 2 away from the optical glue 5, and at least part of the second coating layer 4 can be located between the cover plate 2 and the optical glue 5.

[0042] The inventor found in the research process that the coating for electrostatic protection has different effects on the inhibition of static electricity when the surface resistance of the coating is different. When the surface resistance of the coating is low, the coating can quickly spread the static charge, and then more easily and quickly dissipate in the water vapor in the air, avoiding the accumulation of static charge on the surface. When the surface resistance of the coating is high, the coating can act as a high resistance structure to block the transmission of static charge and weaken the transmission ability of static charge.

[0043] By comprehensively considering the inhibition effect of coatings with different surface resistances on static electricity in different aspects, the embodiment of the present application sets a low-resistance first coating 3 and a high-resistance second coating 4 on the outer and inner sides of the cover plate 2. By setting the first coating 3 with low surface resistance on the outer side (the side close to the light-emitting surface of the display panel) of the cover plate 2, the first coating 3 can be used to accelerate the dissipation of static charge after friction, thereby reducing the accumulation of friction static charge on the outer surface of the display panel. By further setting the second coating 4 with high surface resistance on the inner side (the side away from the light-emitting surface of the display panel) of the cover plate 2, the second coating 4 can be used to further inhibit the transmission of friction static charge to avoid the further transmission of friction static charge into the display substrate 1 after entering the cover plate 2.

[0044] As shown in Figure 3 , a contrast diagram of static electricity transmission provided by the embodiment of the present application is shown in Figure 3 , and A in Figure 2 indicates the generation and transmission of static electricity when the first coating 3 and the second coating 4 are not set on both sides of the cover plate 2, and B indicates the generation and transmission of static electricity when the first coating 3 and the second coating 4 are set on both sides of the cover plate 2. Referring to A, when the first coating 3 and the second coating 4 are not set, a large amount of friction static charge 101 will accumulate on the outer side of the cover plate 2, and the large amount of friction static charge 101 will further penetrate into the display substrate 1 through the cover plate 2, the optical adhesive 5 and the polarizer 6. In the embodiment of the present application, referring to B, after the first coating 3 and the second coating 4 are set on the opposite sides of the cover plate 2, the first coating 3 can directly reduce the amount of friction static charge 101 accumulated on the outer side of the cover plate 2, and even if a small amount of friction static charge 101 enters the cover plate 2, it will be blocked by the second coating 4 on the inner side of the cover plate 2, so that it cannot be further transmitted to the optical adhesive 5, thereby avoiding its transmission to the inside of the display substrate 1.

[0045] Compared with forming a single electrostatic protection layer on one side of the cover plate 2, the embodiment of the present application simultaneously sets the first coating layer 3 and the second coating layer 4 on both sides of the cover plate 2, which have different electrostatic protection effects, and can simultaneously achieve the effects of reducing the accumulation of static electricity on the outside of the cover plate 2 and blocking the transmission of static electricity on the inside of the cover plate 2 based on the cooperation of the first coating layer 3 and the second coating layer 4, so that the electrostatic protection capability of the display panel is significantly improved. In this way, the frictional static electricity transmitted to the display substrate 1 can be significantly reduced, the influence of the frictional static electricity on the electrical characteristics of the electronic devices in the display substrate 1 can be avoided, and the display unevenness of the display panel can be effectively improved.

[0046] In a feasible implementation manner, as shown in Figure 4 Figure 4 Another cross-sectional schematic view of the display panel provided by the embodiment of the present application is shown in the figure, the cover plate 2 includes a bottom surface 7 close to the display substrate 1 and a side wall 8 intersecting the bottom surface 7, and the second coating layer 4 is located on one side of the bottom surface 7 and the side wall 8. For example, the second coating layer 4 at least covers the side wall 8 of the cover plate 2 in the thickness direction of the display panel, and the orthographic projection of the second coating layer 4 in the thickness direction of the display panel covers the bottom surface 7 of the cover plate 2.

[0047] In this arrangement, the second coating layer 4 is located on one side of the bottom surface 7 and the side wall 8 of the cover plate 2, and the second coating layer 4 can not only block the further inward transmission of the frictional static electricity in the cover plate 2 at the bottom of the cover plate 2, but also block the external static electricity from entering the cover plate 2 at the side wall 8 of the cover plate 2 and block the further inward transmission of the static electricity at the side wall 8 of the cover plate 2. The second coating layer 4 of this structure can provide more comprehensive electrostatic protection for the cover plate 2, so as to reduce the static electricity entering the inside of the display substrate 1 to a greater extent.

[0048] In addition, it should be further explained that the reason why the second coating layer 4 is arranged on one side of the side wall 8 of the cover plate 2 in the embodiment of the present application is also based on the following considerations:

[0049] ​First, the side surface area of ​​the display panel (which can be considered as the area of ​​the cover plate 2 at the side wall 8) is much smaller than the front surface area (which can be considered as the area of ​​the cover plate 2 at the bottom surface 7). Therefore, compared with the front surface, the friction area of ​​the display panel on the side is smaller, resulting in less static charge generated and correspondingly less static charge accumulated on the side. If the first coating 3 is placed on one side of the side wall 8 of the cover plate 2 to reduce the accumulation of static charge on the side, the reduction in static charge accumulation will not be significant because the static charge generated on the side is already relatively small. However, by placing the second coating 4 on one side of the side wall 8 of the cover plate 2, the second coating 4 can provide more comprehensive coverage of the cover plate 2. Both static charges generated by friction on the side of the display panel and static charges transferred from other parts of the cover plate 2 to the side can be blocked by the second coating 4 at the side wall 8, preventing them from further transferring into the display panel. In this case, the improvement in the overall electrostatic protection effect of the display panel will be more significant.

[0050] Furthermore, when designing the second coating 4 as a high-resistivity coating, in addition to using a high-resistivity material, its surface resistance can be further increased by thinning the second coating 4. Therefore, in one configuration, the film thickness of the second coating 4 will be much smaller than that of the first coating 3. For this reason, the second coating 4 is placed on one side of the side wall 8 of the cover plate 2, which effectively protects the side of the display panel from electrostatic discharge without significantly affecting the size of the display module.

[0051] In one feasible implementation, such as Figure 5 and Figure 6 As shown, Figure 5 This is a top view of the cover plate 2, ink layer 11, and second coating layer 4 provided in an embodiment of the present invention. Figure 6 for Figure 5 A cross-sectional view along the A1-A2 direction shows that the display panel includes a display area 9 and a bezel area 10. The display panel also includes an ink layer 11, located in the bezel area 10 and at least partially on the side of the cover plate 2 facing the display substrate 1. The ink layer 11 is used to shield peripheral circuitry within the bezel area 10, preventing reflections from the peripheral circuitry from being visible to the human eye. In one configuration, see [reference needed]. Figure 6 The ink layer 11 can be further placed on one side of the side wall 8 of the cover plate 2 to further shield the side of the cover plate 2 from light, prevent stray light from entering the display panel, and reduce reflectivity. The second coating layer 4 overlaps with the ink layer 11.

[0052] In the above arrangement, the second coating layer 4 is partially located in the frame area 10, and the second coating layer 4 can inhibit the further transmission of the triboelectric charge inwardly in the frame area 10, so as to provide electrostatic protection for the peripheral circuit (e.g. a shift register circuit) in the frame area 10, avoid the electrical characteristics of the electronic devices in the peripheral circuit being affected, and further ensure the working reliability of the peripheral circuit.

[0053] Further, referring again to Figure 6 , the second coating layer 4 comprises a first sub-coating layer 12, and the part of the first sub-coating layer 12 overlapping the ink layer 11 is located between the ink layer 11 and the cover plate 2. That is, in the process of the display panel, the first sub-coating layer 12 is formed on one side of the cover plate 2, and then the ink layer 11 is formed.

[0054] Since the ink layer 11 is only located in the frame area 10 of the display panel, and the display area 9 of the display panel is exposed, when the part of the first sub-coating layer 12 overlapping the ink layer 11 is located between the ink layer 11 and the cover plate 2, the first sub-coating layer 12 can exist with a step without being affected by the ink layer 11 when the first sub-coating layer 12 is formed, and the first sub-coating layer 12 is flat and has higher stability.

[0055] And / or, as shown in Figure 7 , Figure 7 is Figure 5 Another sectional view along the A1-A2 direction, the second coating layer 4 comprises a second sub-coating layer 13, and the part of the second sub-coating layer 13 overlapping the ink layer 11 is located on the side of the ink layer 11 away from the cover plate 2. That is, in the process of the display panel, the ink layer 11 is formed on one side of the cover plate 2, and then the second sub-coating layer 13 is formed.

[0056] When the part of the second sub-coating layer 13 overlapping the ink layer 11 is located on the side of the ink layer 11 away from the cover plate 2, the second sub-coating layer 13 can wrap the ink layer 11, and the electrostatic charge entering the ink layer 11 can be blocked by the second sub-coating layer 13 and cannot be further transmitted to the inside of the display panel, so that the part of the electrostatic charge entering the ink layer 11 through the side of the display panel can also be protected.

[0057] In a possible implementation, as shown in Figure 8 , Figure 8 is a top view of the cover plate 2 and the second coating layer 4 provided by the embodiment of the present application, the second coating layer 4 comprises a light-transmitting conductive material, for example, can comprise a high-resistance material such as ceramic, and in the thickness direction of the display panel, the second coating layer 4 covers the cover plate 2.

[0058] The second coating layer 4 of this structure is light-transmitting, can cover the entire cover plate 2 without affecting the normal light emission of the display panel, can effectively inhibit the inward transmission of the triboelectric charge at each position, and the electrostatic protection capability of the second coating layer 4 is more optimal.

[0059] When the second coating 4 comprises a light-transmitting conductive material, in one possible implementation, as shown in Figure 9 and Figure 10 shown, Figure 9 is another top view of the cover plate 2 and the second coating 4 provided in an embodiment of the present application, Figure 10 is Figure 9 is a sectional view along the direction of B1-B2, the display panel comprises a display area 9 and a through-hole area 14, the second coating 4 comprises a first sub-portion 15 and a second sub-portion 16, the first sub-portion 15 is located in the display area 9, and the second sub-portion 16 is located in the through-hole area 14, and the film thickness of the second sub-portion 16 is less than the film thickness of the first sub-portion 15.

[0060] The display panel generally has no film layer stack in the through-hole area 14, so that the static charge in the cover plate is more likely to be transmitted to the inside of the film layer through the sidewall of the film layer in the through-hole area 14. In this regard, in the embodiment of the present application, by covering the through-hole area 14 with the second coating 4 and further thinning the film thickness of the second sub-portion 16 of the second coating 4 located in the through-hole area 14, on the one hand, the surface resistance of the second sub-portion 16 can be further increased by thinning the thickness of the second sub-portion 16, so that the transmission of static charge in the through-hole area 14 is more inhibited, and on the other hand, the second sub-portion 16 is thin, so that the second coating 4 does not significantly affect the transmittance in the through-hole area 14.

[0061] When the second coating 4 comprises a light-transmitting conductive material, in one possible implementation, as shown in Figure 11 and Figure 12 shown, Figure 11 is another top view of the cover plate 2 and the second coating 4 provided in an embodiment of the present application, Figure 12 is Figure 11 is a sectional view along the direction of C1-C2, the display panel comprises a display area 9, the display area 9 comprises a sub-pixel opening area 17 and a non-opening area 18, the second coating 4 comprises a third sub-portion 19 and a fourth sub-portion 20, the third sub-portion 19 is located in the sub-pixel opening area 17, and the fourth sub-portion 20 is located in the non-opening area 18, and the film thickness of the third sub-portion 19 is less than the film thickness of the fourth sub-portion 20.

[0062] The sub-pixel opening area 17 refers to the light-emitting area of the sub-pixel. In an organic light-emitting diode (OLED) display panel, the sub-pixel opening area 17 can be defined by the opening of the pixel definition layer, and in a liquid crystal (LCD) display panel, the sub-pixel opening area 17 can be defined by the opening of the black matrix.

[0063] In the above structure, the transmission of electrostatic charge at the sub-pixel opening area 17 and the non-opening area 18 of the second coating 4 is effectively inhibited, and meanwhile, the influence of the second coating 4 on the light emission of the sub-pixel at the sub-pixel opening area 17 is reduced, so that the sub-pixel opening area 17 has a high light emission rate, and the light emitting element has a high light emission brightness.

[0064] In a feasible implementation, as shown in Figure 13 and Figure 14 , Figure 13 is another top view of the cover plate 2 and the second coating 4 provided by the embodiment of the present application, Figure 14 is Figure 13 a sectional view along the direction of D1-D2, the display panel includes a display area 9, the display area 9 includes a sub-pixel opening area 17 and a non-opening area 18, and the second coating 4 has a hollow 21, and the hollow 21 exposes the sub-pixel opening area 17.

[0065] In the second coating 4 of this structure, the hollow 21 can be arranged to expose the sub-pixel opening area 17, at this time, the second coating 4 no longer overlaps with the sub-pixel opening area 17, and when the material of the second coating 4 is selected, it is no longer necessary to consider whether the material is light-transmissive, so that the flexibility of the material selection of the second coating 4 can be increased, for example, the second coating 4 can be formed by selecting a material that is not light-transmissive but has a higher resistance, so that the second coating 4 has a better electrostatic transmission blocking capability.

[0066] Further, the second coating 4 can include a light-transmissive conductive material, for example, a metal material. The light-transmissive conductive material has a wide selection range, for example, a metal material with various resistivities can be selected, and then the surface resistance can be optimized.

[0067] In a feasible implementation, as shown in Figure 15 , Figure 15 is another sectional view of the display panel provided by the embodiment of the present application, and the display panel further includes a filter 22, the filter 22 is located between the display substrate 1 and the cover plate 2, and the filter 22 includes a color resistance 23. At least part of the color resistance 23 is located in the hollow 21 of the second coating 4, and the second coating 4 is multiplexed as a black matrix 24.

[0068] More specifically, referring again to Figure 15In one arrangement, the display substrate 1 comprises a substrate 25, an array layer 26, a light emitting element 27 and an encapsulation layer 28. The color resist 23 overlaps the light emitting element 27 in the thickness direction of the display panel, and the overlapping color resist 23 and the light emitting element 27 have the same color. The color resist 23 is used to emit light with the same color and filter light with different colors. This kind of display panel uses the filter 22 to replace the polarizer to achieve the filtering effect. This technology is also known as the polarizer-free technology. In the conventional filter 22 design, the filter 22 comprises the color resist 23 and the black matrix. In the embodiment of the present application, when the second coating 4 is formed by using the light-proof material, the second coating 4 can be multiplexed as the black matrix 24. At this time, the second coating 4 has the functions of inhibiting the static electricity transmission and light shielding. Therefore, the original black matrix structure in the filter 22 can be omitted, the structure of this kind of display panel is simplified, and the manufacturing cost is saved.

[0069] However, it should be noted that the scheme provided by the embodiment of the present application is not limited to the display panel using the polarizer-free technology. Other types of display panels can also be applicable.

[0070] In one possible implementation, as shown in Figure 16 , Figure 16 Fig. 6 is another cross-sectional schematic view of the display panel provided by the embodiment of the present application. The first coating 3 comprises a third sub-coating 29 and a fourth sub-coating 30. The third sub-coating 29 and the fourth sub-coating 30 further comprise a first dielectric layer 31 therebetween. The third sub-coating 29 and the fourth sub-coating 30 can comprise low-resistance materials such as metal oxides, and the first dielectric layer 31 can comprise materials such as silicon dioxide.

[0071] As described above, the surface resistance of the first coating 3 is relatively low. Generally, the resistance of the first coating 3 can be reduced by increasing the thickness of the first coating 3. If the first coating 3 is designed by using only one layer, the first coating 3 is relatively thick. The thickness of the first coating 3 at different positions can be difficult to accurately control, so that the film thickness of the first coating 3 at different positions is different, and thus the dissipation degree of the static electricity at different positions of the first coating 3 is inconsistent.

[0072] In the embodiment of the present application, the first coating 3 is designed to comprise at least the third sub-coating 29 and the fourth sub-coating 30. The total thickness difference of the two sub-coatings at different positions is smaller. For example, the position where the third sub-coating 29 is relatively thin can correspond to the position where the fourth sub-coating 30 is relatively thick, so that the total thickness of the third sub-coating 29 and the fourth sub-coating 30 at this position is consistent with that at other positions. This arrangement can improve the resistance consistency of the first coating 3 at different positions, and thus improve the consistency of the dissipation degree of the static electricity at different positions of the first coating 3.

[0073] Furthermore, the fourth sub-coating 30 is located on the side of the third sub-coating 29 facing away from the display substrate 1, and the surface resistance of the fourth sub-coating 30 is less than the surface resistance of the third sub-coating 29. In one configuration, such as... Figure 17 As shown, Figure 17 This is another cross-sectional schematic diagram of the display panel provided in an embodiment of the present invention. When the materials used for the third sub-coating 29 and the fourth sub-coating 30 are the same, the film thickness of the fourth sub-coating 30 can be set to be larger so that its surface resistance is smaller.

[0074] Since the fourth sub-coating 30 is closer to the light-emitting side of the display panel, the surface resistance of the fourth sub-coating 30 is set to be lower, so that the triboelectric static charge can be dissipated more quickly on the light-emitting side of the display panel, thereby reducing the amount of static charge that continues to be transmitted inward into the cover plate 2.

[0075] In one feasible implementation, such as Figure 18 and Figure 19 As shown, Figure 18 This is another cross-sectional schematic diagram of the display panel provided in an embodiment of the present invention. Figure 19 This is another cross-sectional schematic diagram of the display panel provided in an embodiment of the present invention. The display panel further includes an anti-fingerprint layer 32, which is located on the side of the first coating 3 away from the cover plate 2. The anti-fingerprint layer 32 can be an AF (Anti-Finger Print) coating, a fluorine-containing coating with good waterproof and oil-proof effects. It can enhance the smoothness and touch feel of the display panel and prevent users from leaving fingerprints on the screen surface, thus affecting its appearance. A second dielectric layer 33 is also included between the anti-fingerprint layer 32 and the first coating 3. The second dielectric layer 33 can be formed of materials such as silicon dioxide.

[0076] On the one hand, the second dielectric layer 33 can protect the first coating layer 3, improve the oxidation resistance and corrosion resistance of the first coating layer 3, and make it have reliable electrostatic protection performance. On the other hand, the second dielectric layer 33 can also serve as the underlayer of the anti-fingerprint layer 32, making it easier to form the anti-fingerprint layer 32 on top of it.

[0077] In one feasible embodiment, the surface resistance of the first coating 3 is R1, and the surface resistance of the second coating 4 is R2. To ensure that the first coating 3 has good anti-static accumulation capabilities and that the second coating 4 has good anti-static charge transport capabilities, R1 and R2 can be set to: 10... 7 Ω < R1 < 10 11 Ω, R2>10 13 Ω.

[0078] Based on the same inventive concept, embodiments of the present invention also provide a display device, such as...Figure 20 As shown, Figure 20 A structural schematic diagram of a display device provided by an embodiment of the present application is shown, which comprises the display panel 100. The specific structure of the display panel 100 has been described in detail in the above embodiment, and will not be described here again. Of course, Figure 20 The display device shown is only for illustrative purposes, and the display device can be any electronic device with display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic paper, or a television.

[0079] The above only describes preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized by, The display panel comprises: a display substrate; a cover plate located on a side of the display substrate facing a light-emitting surface of the display panel; a first coating layer located on a side of the cover plate away from the display substrate; a second coating layer at least partially located on a side of the cover plate close to the display substrate, and a surface resistance of the second coating layer is greater than a surface resistance of the first coating layer; the display panel further comprises a display area and a frame area, and a part of the second coating layer is located in the display area and a part of the second coating layer is located in the frame area.

2. The display panel of claim 1, wherein the cover plate comprises a bottom surface close to the display substrate and a side wall intersecting the bottom surface, and the second coating layer is located on a side of the bottom surface and the side wall.

3. The display panel of claim 1, wherein, The display panel further comprises: an ink layer located in the frame area, at least a part of the ink layer is located on a side of the cover plate facing the display substrate, and the second coating layer overlaps the ink layer.

4. The display panel of claim 3, wherein the second coating layer comprises a first sub-coating layer, and a part of the first sub-coating layer overlapping the ink layer is located between the ink layer and the cover plate.

5. The display panel of claim 3, wherein the second coating layer comprises a second sub-coating layer, and a part of the second sub-coating layer overlapping the ink layer is located on a side of the ink layer away from the cover plate.

6. The display panel of claim 1, wherein the second coating layer comprises a light-transmitting conductive material, and the second coating layer covers the cover plate in a thickness direction of the display panel.

7. The display panel of claim 6, wherein the display panel further comprises a through-hole area, the second coating layer comprises a first sub-part and a second sub-part, the first sub-part is located in the display area, and the second sub-part is located in the through-hole area, and a film thickness of the second sub-part is less than a film thickness of the first sub-part.

8. The display panel of claim 6, wherein the display area comprises a sub-pixel opening area and a non-opening area, the second coating layer comprises a third sub-part and a fourth sub-part, the third sub-part is located in the sub-pixel opening area, and the fourth sub-part is located in the non-opening area, and a film thickness of the third sub-part is less than a film thickness of the fourth sub-part.

9. The display panel of claim 1, wherein the display area comprises a sub-pixel opening area and a non-opening area, and the second coating layer has an aperture, and the aperture exposes the sub-pixel opening area.

10. The display panel of claim 9, wherein the second coating layer comprises a light-blocking conductive material.

11. The display panel of claim 10, wherein the display panel further comprises a filter located between the display substrate and the cover plate, and the filter comprises a color resist; at least a part of the color resist is located in the aperture of the second coating layer, and the second coating layer is multiplexed as a black matrix.

12. The display panel of claim 1, wherein the first coating layer comprises a third sub-coating layer and a fourth sub-coating layer, and a first dielectric layer is further included between the third sub-coating layer and the fourth sub-coating layer.

13. The display panel of claim 12, wherein, the fourth sub-coating is located on a side of the third sub-coating away from the display substrate, and a surface resistance of the fourth sub-coating is less than a surface resistance of the third sub-coating.

14. The display panel of claim 1, wherein, the display panel further comprises an anti-fingerprint layer located on a side of the first coating away from the cover plate, and a second dielectric layer is further included between the anti-fingerprint layer and the first coating.

15. The display panel of claim 1, wherein, The surface resistance of the first coating is R1, 10 7 Ω < R1 < 10 11 Ω. The surface resistance of the second coating is R2, R2 > 10 13 Ω.

16. A display device comprising: a display panel as claimed in any one of claims 1-15.

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