Display panel and display device

Abstract

The invention provides a display panel and a display device.The display panel comprises a display area and a non-display area, and the non-display area comprises a step area; the display panel further comprises a passivation layer which covers the display area. The first planarization layer is arranged on one side of the passivation layer; the isolation column and the first planarization layer are arranged on the same side of the passivation layer, the isolation column is further arranged in the non-display area and surrounds the display area, and the step area is arranged on the side, away from the display area, of the isolation column; the first planarization layer is arranged on the side, close to the display area, of the isolation column and covers the display area. According to the display panel, the first planarization layer is arranged on the side, close to the display area, of the isolation column, that is, the first planarization layer does not extend to the step area any more, so that the problem that in the step area, the first planarization layer made of an organic material and the passivation layer made of an inorganic material are peeled off due to large-area contact can be avoided, and the service life of the display panel is prolonged.

Description

Technical Field

[0001] The present disclosure relates to the field of display panels, and more particularly, to a display panel and a display device. Background Art

[0002] AMOLED (Active-Matrix Organic Light-Emitting Diode) is a display panel technology mainly used in devices such as smartphones, and has advantages such as low power consumption, low cost, and large size.

[0003] However, in the related art, in the step region of the display panel, the planarization layer above the thin film transistor and the passivation layer located in the thin film transistor segment are in large-area contact. Also, since the planarization layer uses an organic material and the passivation layer uses an inorganic material, peeling problems will occur after long-term large-area contact between the two.

[0004] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0005] In view of this, the present disclosure provides a display panel and a display device to at least solve the problem of peeling between the planarization layer above the thin film transistor and the passivation layer located in the thin film transistor segment in the step region of the existing display panel.

[0006] In one aspect, an embodiment of the present disclosure provides a display panel, including a display area and a non-display area, the non-display area including a step region; the display panel further includes: a passivation layer covering the display area; a first planarization layer disposed on one side of the passivation layer; an isolation column, the isolation column and the first planarization layer being disposed on the same side of the passivation layer, the isolation column further being disposed in the non-display area and surrounding the display area, the step region being disposed on the side of the isolation column away from the display area; the first planarization layer being disposed on the side of the isolation column close to the display area and covering the display area.

[0007] In another aspect, an embodiment of the present disclosure further provides a display device including the above display panel.

[0008] Compared with the prior art, the present disclosure has at least the following technical effects:

[0009] In the display panel and the display device of the present disclosure, by disposing the first planarization layer on the side of the isolation column close to the display area, that is, the first planarization layer no longer extends to the step region, it is possible to avoid the peeling problem caused by the large-area contact between the organic material first planarization layer and the inorganic material passivation layer in the step region, and improve the service life of the display panel. Brief Description of the Drawings

[0010] The drawings herein are incorporated into and form a part of this specification, showing embodiments in accordance with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0011] Figure 1 is a schematic top view structure diagram of a display panel in the related art;

[0012] Figure 2 is Figure 1 a schematic cross-sectional structure diagram of the display panel AA' in;

[0013] Figure 3 is a schematic structure diagram of a display panel provided by an embodiment of the present disclosure;

[0014] Figure 4 is Figure 3 a schematic cross-sectional structure diagram of the display panel including other film layers in;

[0015] Figure 5 is a schematic top view structure diagram of a display panel provided by an embodiment of the present disclosure;

[0016] Figure 6 is Figure 5 a schematic cross-sectional structure diagram of a BB' cross-section of the display panel in;

[0017] Figure 7 is Figure 5 an enlarged view of region E in;

[0018] Figure 8 is Figure 7 an enlarged view of region F in;

[0019] Figure 9 is Figure 8 a schematic cross-sectional structure diagram of the CC' cross-section in;

[0020] Figure 10 is Figure 8 a schematic cross-sectional structure diagram of the DD' cross-section in;

[0021] Figure 11 is Figure 5 a schematic cross-sectional structure diagram of another BB' cross-section of the display panel in;

[0022] Figure 12 is a schematic structure diagram of a display device provided by an embodiment of the present disclosure;

[0023] Reference Numerals:

[0024] 100, Display panel;

[0025] 111, Display area;

[0026] 112, Non-display area;

[0027] 113, Step area;

[0028] 121, Passivation layer;

[0029] 122, Insulating layer;

[0030] 131, First planarization layer;

[0031] 132, Second planarization layer;

[0032] 133, Isolation column;

[0033] 140, Light-emitting unit layer;

[0034] 151, Polarizer;

[0035] 152, Polarizing adhesive layer;

[0036] 153, Step sealant;

[0037] 160, Water vapor guiding channel;

[0038] 161, Water vapor guiding wall;

[0039] 162, Trace protection layer;

[0040] 170, First metal layer;

[0041] 171, Cathode trace;

[0042] 172, Electrostatic protection trace;

[0043] 181, Touch protection layer;

[0044] 182, Touch metal layer;

[0045] 183, Touch terminal;

[0046] 191, Substrate;

[0047] 192, Flexible circuit board;

[0048] 200, Display device. Detailed implementation manners

[0049] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their repetitive description will be omitted.

[0050] The terms "first", "second", and the like used in the detailed description do not denote any order, quantity, or importance, but are merely used to distinguish different components. In addition, in the description of the present disclosure, the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, which is only for convenience of description and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present disclosure.

[0051] It should be noted that, without conflict, the features in the embodiments of the present disclosure and different embodiments can be combined with each other.

[0052] As Figure 1 and Figure 2 shown, the related art provides a display panel 100', which includes a display area 111' and a non-display area 112', and the non-display area 112' includes a stepped area 113'. The display panel 100' further includes: a passivation layer 121', a first planarization layer 131', and an isolation pillar 133'. However, in the stepped area 113' of the display panel 100', the first planarization layer 131' above the thin film transistor and the passivation layer 121' located in the thin film transistor segment are in large-area contact. Also, since the first planarization layer 131' is usually made of an organic material and the passivation layer 121' is usually made of an inorganic material, peeling problems will occur after long-term large-area contact between the two.

[0053] The display panel 100' further includes: a second planarization layer 132'. However, in the related art, in the stepped area 113' of the display panel 100', the second planarization layer 132' is in surface contact with the first planarization layer 131'. Also, since the second planarization layer 132' is usually made of an inorganic material, peeling problems will also occur after long-term surface contact between the two.

[0054] The display panel 100' further includes: an insulating layer 122'. However, in the related art, in the stepped area 113' of the display panel 100', the insulating layer 122' is in large-area surface contact with the first planarization layer 131', and peeling problems will also occur between the two after a long time.

[0055] The display panel 100' further includes: a polarizer 151' and a stepped sealant 153'. However, in the related art, during the preparation process of the polarizer 151', shrinkage may occur due to high temperature, and during the bending preparation process of the display panel 100', due to deformation and other reasons, the polarizer 151' and the stepped sealant 153' may have a peeling problem, and then a groove is formed between the polarizer 151' and the stepped sealant 153'. Moisture in the air enters the stepped area 113' of the display panel 100' through this groove, resulting in peeling of the film layer and electrochemical corrosion in the stepped area 113'.

[0056] In view of this, on the one hand, as Figure 3 shown, an embodiment of the present disclosure provides a display panel 100. The display panel 100 includes a display area 111 and a non-display area 112, and the non-display area 112 includes a stepped area 113. The display panel 100 further includes: a passivation layer 121, a first planarization layer 131, and an isolation pillar 133.

[0057] Among them, the passivation layer 121 covers the display area 111. The first planarization layer 131 is disposed on one side of the passivation layer 121. The isolation pillar 133 and the first planarization layer 131 are disposed on the same side of the passivation layer 121. The isolation pillar 133 is further disposed in the non-display area 112 and surrounds the display area 111. The stepped area 113 is disposed on the side of the isolation pillar 133 away from the display area 111. The first planarization layer 131 is disposed on the side of the isolation pillar 133 close to the display area 111 and covers the display area 111.

[0058] Specifically, the passivation layer 121 is located in the thin-film transistor section of the display panel 100 and is used to protect the metal layer in the thin-film transistor section, and can be prepared by an inorganic material. The first planarization layer 131 is located above the thin-film transistor section of the display panel 100 and is used to planarize the thin-film transistor section to facilitate the preparation of subsequent film layers. The first planarization layer 131 can be prepared by an organic material. The first planarization layer 131 can eliminate a part of the stepped area 113 by etching and other means, so that the first planarization layer 131 is disposed on the side of the isolation pillar 133 close to the display area 111. The isolation pillar 133 surrounds the display area 111, which can ensure that during the preparation process of the display area 111, liquid materials such as an inkjet printing layer will not overflow into the stepped area 113, avoid contamination of the stepped area 113, and can be cured to form the film layer structure of the display panel 100.

[0059] Further, along the direction in which the passivation layer 121 is close to the first planarization layer 131, the isolation pillar 133 sequentially includes a first planarization layer 131, a pixel definition layer, and a support pillar. The pixel definition layer is used to form pixel definition openings in the display area 111 of the display panel 100 to accommodate light-emitting pixels. The pixel definition layer included in the isolation pillar 133 is located in the non-display area 112. The support pillar is used to support the structure of the display panel 100 to avoid pressing damage to the display panel 100.

[0060] In this embodiment, by disposing the first planarization layer 131 on the side of the isolation pillar 133 close to the display area 111, that is, the first planarization layer 131 no longer extends to the step area 113, it is possible to avoid the peeling problem caused by the large-area contact between the first planarization layer 131 made of organic material and the passivation layer 121 made of inorganic material in the step area 113, and improve the service life of the display panel 100.

[0061] In some embodiments, as Figure 4 shown, the display panel 100 further includes a light-emitting unit layer 140 and a second planarization layer 132. The light-emitting unit layer 140 is disposed on the side of the first planarization layer 131 facing away from the passivation layer 121, and the light-emitting unit layer 140 is also disposed in the display area 111. The second planarization layer 132 is disposed on the side of the light-emitting unit layer 140 and the isolation pillar 133 facing away from the first planarization layer 131, and the second planarization layer 132 covers the display area 111 and at least part of the step area 113. Specifically, the light-emitting unit layer 140 includes a plurality of light-emitting pixels arranged in an array, and the light-emitting pixels emit light under the drive of thin-film transistors to form the display of the display panel 100. The second planarization layer 132 is used to planarize the light-emitting unit layer 140 to facilitate the preparation of subsequent film layers. The second planarization layer 132 can be prepared by CVD (Chemical Vapor Deposition) technology and is usually an inorganic material. By combining the foregoing embodiments, in this embodiment, the first planarization layer 131 is disposed on the side of the isolation pillar 133 close to the display area 111, that is, the first planarization layer 131 no longer extends to the step area 113, so as to avoid the surface contact between the first planarization layer 131 made of organic material and the second planarization layer 132 made of inorganic material in the step area 113, thereby avoiding the peeling problem caused by the surface contact between the two and improving the service life of the display panel 100.

[0062] In some embodiments, continue to refer to Figure 4, the display panel 100 further includes: an insulating layer 122. The insulating layer 122 is disposed on a side of the second planarization layer 132 facing away from the light-emitting unit layer 140, and the insulating layer 122 covers the display area 111 and at least a part of the stepped area 113; the insulating layer 122 is in surface contact with the passivation layer 121 in the stepped area 113. Specifically, the insulating layer 122 is used to insulate the light-emitting structure and the touch structure of the display panel 100. The insulating layer 122 can be prepared from silicon nitride (SiNx) material. In the stepped area 113, the insulating layer 122 is in surface contact with the passivation layer 121. By combining with the foregoing embodiments in this embodiment, the first planarization layer 131 is disposed on a side of the isolation pillar 133 close to the display area 111, that is, the first planarization layer 131 no longer extends to the stepped area 113, thereby avoiding the surface contact between the first planarization layer 131 made of organic material and the insulating layer 122 made of inorganic material in the stepped area 113, and thus avoiding the peeling problem caused by the surface contact between the two, and improving the service life of the display panel 100; at the same time, in the stepped area 113, the insulating layer 122 is in surface contact with the passivation layer 121. Since both of them are inorganic materials, the contact strength is relatively high, which can improve the service life of the display panel 100.

[0063] In some embodiments, such as Figure 5 and Figure 6As shown, the display panel 100 further includes: a polarizer 151 and a step sealant 153. Among them, the polarizer 151 is disposed on a side of the first planarization layer 131 facing away from the passivation layer 121, and the polarizer 151 covers the display area 111 and a part of the step area 113. The step sealant 153 is disposed in the step area 113, and the step sealant 153 is adhesively bonded to a side surface of the polarizer 151 disposed in the step area 113. A part of the first planarization layer 131 is also disposed in the step area 113, and the first planarization layer 131 disposed in the step area 113 has a moisture guiding channel 160 formed by a linear groove. The moisture guiding channel 160 intersects with an edge of the polarizer 151 disposed in the step area 113 in the thickness direction of the display panel 100, and one end of the moisture guiding channel 160 is disposed at a cutting edge of the display panel 100. Specifically, the polarizer 151 is used to reduce the reflection of ambient light and improve the contrast and clarity of the display screen. The display panel 100 further includes a polarizing adhesive layer 152 for pasting the polarizer 151. The step sealant 153 is used to protect the film layer structure in the step area 113 from external damage and fill the gaps between the film layer structures. The material of the step sealant 153 may include: ultraviolet curable glue (UV glue), silicone glue, epoxy resin glue or polyurethane glue. In addition, the step sealant 153 is only adhesively bonded to a side surface of the polarizer 151 close to the step sealant 153, and is not adhesively bonded to the upper surface of the polarizer 151. That is, the adhesive height of the step sealant 153 with the polarizer 151 may be less than or equal to the sum of the thicknesses of the polarizer 151 and the polarizing adhesive layer 152, so as to avoid forming a sharp corner protrusion at the adhesive joint of the step sealant 153 and the polarizer 151 after the protective film of the polarizer 151 is peeled off during the preparation process of the display panel 100, thereby affecting the preparation of subsequent film layers. The moisture guiding channel 160 may be formed by etching the first planarization layer 131. The first planarization layer 131 on both sides of the moisture guiding channel 160 forms a moisture guiding wall 161. In this embodiment, by intersecting the moisture guiding channel 160 with an edge of the polarizer 151 disposed in the step area 113 in the thickness direction of the display panel 100, when the polarizer 151 and the step sealant 153 are peeled off to form a groove due to reasons such as high-temperature shrinkage of the polarizer 151 or bending preparation of the display panel 100, the moisture entering the step area 113 of the display panel 100 from the air through the groove can be smoothly guided into the moisture guiding channel 160; by disposing one end of the moisture guiding channel 160 at the cutting edge of the display panel 100, the moisture entering the moisture guiding channel 160 can be led out of the display panel 100, thereby avoiding the peeling and electrochemical corrosion of the film layer in the step area 113. Specifically, this embodiment can at least avoid the peeling of the first planarization layer 131 and the passivation layer 121, the first planarization layer 131 and the second planarization layer 132, and the first planarization layer 131 and the insulating layer 122 in the step area 113.

[0064] In some embodiments, such as Figure 5, Figure 6 , Figure 7 and Figure 8 As shown in Figure 6 , Figure 7 , and Figure 8 , the display panel 100 further includes: a first metal layer 170. The first metal layer 170 is disposed on a side of the passivation layer 121 facing away from the first planarization layer 131. The first metal layer 170 includes a cathode trace 171 and an electrostatic protection trace 172 that are electrically connected to each other. The electrostatic protection trace 172 is disposed in the moisture guiding channel 160 and extends along the extending direction of the moisture guiding channel 160. Specifically, the passivation layer 121 is used to protect the first metal layer 170 of the thin film transistor section of the display panel 100. The display panel 100 further includes a flexible printed circuit 192 (Flexible Printed Circuit, FPC) for connecting the display panel 100 to a driving circuit, and controlling each light-emitting pixel of the light-emitting unit layer 140 on the display panel 100 by transmitting electrical signals to implement image display. The flexible printed circuit 192 is electrically connected to at least the cathode trace 171 of the first metal layer 170. In this embodiment, by electrically connecting the cathode trace 171 through the electrostatic protection trace 172 in the moisture guiding layer, when the display panel 100 is in an electrostatic field environment, the static electricity can be conducted to the cathode trace 171 or the flexible printed circuit 192 through the electrostatic protection trace 172, improving the antistatic ability of the display panel 100. In addition, in this embodiment, by combining the foregoing moisture guiding channel 160, the electrochemical corrosion of the first metal layer 170 caused by moisture entering the step region 113 of the display panel 100 from the air can be avoided.

[0065] In some embodiments, continuing to refer to Figure 7 and Figure 8 , one end of the electrostatic protection trace 172 is electrically connected to the cathode trace 171, and the other end extends to the cutting edge of the display panel 100. Specifically, the cutting edge of the display panel 100 refers to the edge region formed on the glass substrate 191 of the display panel 100 during the cutting process, and these edges are usually formed through precise cutting processes. Therefore, one end of the electrostatic protection trace 172 extends to the cutting edge of the display panel 100, that is, extends to the edge of the display panel 100. In this embodiment, when the display panel 100 is in an electrostatic field environment or the edge of the display panel 100 is affected by static electricity, the static electricity can be conducted to the cathode trace 171 or the flexible printed circuit 192 through the electrostatic protection trace 172, improving the antistatic ability of the display panel 100.

[0066] In some embodiments, as shown in Figure 6 , Figure 9 and Figure 10As shown, part of the passivation layer 121 is also disposed in the step region 113. The passivation layer 121 disposed in the step region 113 at least covers the side surface of the electrostatic protection trace 172 close to the side wall of the water vapor guiding channel 160. Specifically, the passivation layer 121 covering the side surface of the electrostatic protection trace 172 constitutes a trace protection layer 162, and the trace protection layer 162 at least wraps the side surface of the electrostatic protection trace 172. The trace protection layer 162 may also at least partially expose the upper surface of the electrostatic protection trace 172 (such as Figure 6 and Figure 9 ), or completely wrap the upper surface of the electrostatic protection trace 172. When the trace protection layer 162 partially exposes the upper surface of the electrostatic protection trace 172, the trace protection layer 162 may include two separated parts to respectively protect the two side surfaces of the electrostatic protection trace 172. This embodiment can avoid the electrochemical corrosion of the electrostatic protection trace 172 by the water vapor in the water vapor guiding channel 160, improve the service life of the electrostatic protection trace 172, and enhance the antistatic ability of the display panel 100.

[0067] In some embodiments, the thickness of the passivation layer 121 covering the electrostatic protection trace 172 is greater than or equal to 2 micrometers. That is, the thickness of the trace protection layer 162 is greater than or equal to 2 micrometers. Specifically, the thickness of the trace protection layer 162 may be any value among 2 micrometers, 3 micrometers, 4 micrometers, 5 micrometers, 10 micrometers, 20 micrometers, or 30 micrometers, and the present disclosure does not limit this. Through the setting of the thickness of the passivation layer 121 covering the electrostatic protection trace 172 in this embodiment, the electrochemical corrosion of the electrostatic protection trace 172 by the water vapor in the water vapor guiding channel 160 can be further avoided, the service life of the electrostatic protection trace 172 can be further improved, and the antistatic ability of the display panel 100 can be further enhanced.

[0068] In some embodiments, with continued reference to Figure 6 and Figure 9 , the passivation layer 121 disposed in the step region 113 does not contact the first planarization layer 131 that constitutes the water vapor guiding channel 160. That is, the trace protection layer 162 does not contact the water vapor guiding wall 161 formed by the first planarization layer 131 on both sides of the water vapor guiding channel 160. Specifically, the thickness of the water vapor guiding wall 161 is greater than or equal to the thickness of the trace protection layer 162. Through the non-contact between the trace protection layer 162 and the water vapor guiding wall 161 in this embodiment, the peeling problem caused by the surface contact between the first planarization layer 131 of the organic material and the passivation layer 121 of the inorganic material in the step region 113 can be avoided, and the service life of the display panel 100 can be improved.

[0069] In some embodiments, with continued reference to Figure 6 、 Figure 7 、 Figure 8 and Figure 9, the first planarization layer 131 forming the water vapor guiding channel 160 and the first metal layer 170 do not overlap in the thickness direction of the display panel 100. Specifically, in addition to including the cathode trace 171 and the electrostatic protection trace 172, the first metal layer 170 may further include other trace structures. The first planarization layer 131 forming the water vapor guiding channel 160, that is, the water vapor guiding wall 161, does not overlap with the cathode trace 171, the electrostatic protection trace 172, and other traces formed by the first metal layer 170 in the thickness direction of the display panel 100. Through the above settings in this embodiment, the peeling problem between the first planarization layer 131 and the first metal layer 170 can be avoided, and the service life of the display panel 100 can be improved; at the same time, it can be avoided that the area covered by the first planarization layer 131 forming the water vapor guiding channel 160 has the first metal layer 170, and the electrochemical corrosion of the first metal layer 170 can be avoided, thereby improving the service life of the display panel 100.

[0070] In some embodiments, with continued reference to Figure 8 , in the direction perpendicular to the edge of the step region 113 where the polarizer 151 is disposed, the extension width of the water vapor guiding channel 160 is D1, and D1 ≥ 300 microns. Specifically, the extension width of the water vapor guiding channel 160 may be any value among 300 microns, 350 microns, 400 microns, 450 microns, or 500 microns, and the present disclosure does not limit this. In addition, since the water vapor guiding channel 160 intersects with the edge of the step region 113 where the polarizer 151 is disposed in the thickness direction of the display panel 100, and the design purpose of the water vapor guiding channel 160 is to smoothly guide the water vapor entering the step region 113 of the display panel 100 from the air through the groove formed due to the peeling of the polarizer 151 due to high-temperature shrinkage of the polarizer 151 or the bending preparation of the display panel 100, etc. into the water vapor guiding channel 160, therefore, through the above settings in this embodiment, it can be ensured that as much water vapor as possible entering the step region 113 of the display panel 100 is smoothly guided into the water vapor guiding channel 160 to be discharged from the display panel 100. At the same time, due to the process error of -150 to +150 microns in the pasting preparation process of the polarizer 151, therefore, the setting that the extension width of the water vapor guiding channel 160 in this embodiment is greater than or equal to 300 microns can still ensure that the water vapor guiding channel 160 intersects with the edge of the step region 113 where the polarizer 151 is disposed in the thickness direction of the display panel 100 even in the case of the pasting preparation process error of the polarizer 151, and thus it can be ensured that the water vapor entering the step region 113 of the display panel 100 from the air through the groove is smoothly guided into the water vapor guiding channel 160.

[0071] In some embodiments, with continued reference to Figure 7 and Figure 8, the display panel 100 has at least two moisture guiding channels 160; at least one moisture guiding channel 160 intersects with the edge of the polarizer 151 disposed in the step region 113 in the thickness direction of the display panel 100. Specifically, when the display panel 100 has only one moisture guiding channel 160, this moisture guiding channel 160 intersects with the edge of the polarizer 151 disposed in the step region 113 in the thickness direction of the display panel 100. When the display panel 100 has two moisture guiding channels 160 (such as Figure 7 and Figure 8 shown), one of the moisture guiding channels 160 can intersect with the edge of the polarizer 151 disposed in the step region 113 in the thickness direction of the display panel 100, or both of the two moisture guiding channels 160 intersect with the edge of the polarizer 151 disposed in the step region 113 in the thickness direction of the display panel 100. Through the above settings in this embodiment, the coverage area of the moisture guiding channel 160 can be increased, so that the moisture in the step region 113 can more easily enter the moisture guiding channel 160, thereby improving the moisture guiding effect and the electrostatic protection ability of the display panel 100.

[0072] In some embodiments, at least a part of the moisture guiding channel 160 is cross-shaped. In the existing display panel 100, a panel mark is provided in the step region 113 of the display panel 100 to facilitate positioning during subsequent binding, attaching the polarizer 151, cleaning, etc. of the display panel 100. In this embodiment, since at least a part of the moisture guiding channel 160 is cross-shaped, it can at least partially replace the panel mark provided in the step region 113 of the display panel 100 for positioning during subsequent binding, attaching the polarizer 151, cleaning, etc. of the display panel 100, simplifying the manufacturing process of the display panel 100 and improving the manufacturing efficiency of the display panel 100.

[0073] In some embodiments, continue to refer to Figure 6, the display panel 100 further includes: an insulating layer 122 disposed on a side of the first planarization layer 131 and the isolation pillars 133 facing away from the passivation layer 121, and the insulating layer 122 covers the water vapor guiding channel 160; and / or, the display panel 100 further includes: a touch protection layer 181 disposed on a side of the first planarization layer 131 and the isolation pillars 133 facing away from the passivation layer 121, and the touch protection layer 181 covers the water vapor guiding channel 160. Specifically, for the setting of the insulating layer 122 in this embodiment, reference may be made to the foregoing embodiments, which will not be elaborated herein. In addition, the display panel 100 may be a touch panel prepared by the One Glass process. The One Glass process is to integrate the touch glass (Touch Sensor) and the cover glass (Cover Glass), that is, to deposit an ITO (Indium Tin Oxides) conductive layer on the inner side of the general cover glass, so that the single glass not only has the strength and safety of the cover glass, but also has the touch function. When the display panel 100 is a touch panel, the display panel 100 further includes a touch metal layer 182 having a plurality of touch terminals 183, which are electrically connected to the driving chip through a flexible circuit board 192 to transmit touch signals. The touch protection layer 181 is used to protect the touch metal layer 182. In this embodiment, by setting the insulating layer 122 and / or the touch protection layer 181 to cover the water vapor guiding channel 160, it is possible to avoid removing the insulating layer 122 and / or the touch protection layer 181 in the step region 113 of the display panel 100, simplify the manufacturing process of the display panel 100, and at the same time, avoid the excessive use of the step sealant 153 caused by the increased space for filling the step region 113 when removing the insulating layer 122 and / or the touch protection layer 181.

[0074] In some embodiments, such as Figure 11As shown, the display panel 100 further includes: an insulating layer 122 disposed on a side of the first planarization layer 131 and the isolation posts 133 facing away from the passivation layer 121, and the insulating layer 122 does not overlap with the water vapor guiding channel 160 in the thickness direction of the display panel 100; and / or, the display panel 100 further includes: a touch protection layer 181 disposed on a side of the first planarization layer 131 and the isolation posts 133 facing away from the passivation layer 121, and the touch protection layer 181 does not overlap with the water vapor guiding channel 160 in the thickness direction of the display panel 100. Specifically, by removing the insulating layer 122 and / or the touch protection layer 181 in the stepped area 113 of the display panel 100, the insulating layer 122 and / or the touch protection layer 181 can be made not to overlap with the water vapor guiding channel 160. In this embodiment, by setting the insulating layer 122 and / or the touch protection layer 181 not to overlap with the water vapor guiding channel 160, the stepped area 113 can be made to have no insulating layer 122 and / or touch protection layer 181, thereby avoiding further guiding the water vapor entering the stepped area 113 of the display panel 100 through the groove from the air into the water vapor guiding channel 160 in the case where the polarizer 151 and the stepped sealant 153 are peeled off to form a groove due to reasons such as high-temperature shrinkage of the polarizer 151 or bending preparation of the display panel 100; at the same time, the peeling risk of the insulating layer 122 and the touch protection layer 181, as well as the peeling risk between the insulating layer 122 and the touch protection layer 181 and other film layers, can be reduced, and the service life of the display panel 100 can be improved.

[0075] In some embodiments, with continued reference to Figure 4 、 Figure 6 and Figure 11 , the display panel 100 further includes: a substrate 191. Along the direction of the passivation layer 121 approaching the substrate 191, the display panel 100 further includes, in sequence: an interlayer insulating layer 122 (InterLayer Dielectric, ILD), a capacitive insulating layer 122, and a gate insulating layer 122. The interlayer insulating layer 122 is used to achieve the interlayer insulation effect of the display panel 100. The capacitive insulating layer 122 is used to achieve the insulation effect of the capacitive electrodes of the display panel 100. The gate insulating layer 122 is used to achieve the gate insulation effect of the transistors of the display panel 100.

[0076] In some alternative embodiments, the display panel 100 may be a liquid crystal display (LCD) panel, an organic light emitting diode (OLED) display panel 100, an active-matrix organic light-emitting diode (AMOLED) display panel 100, a micro-light emitting diode (Micro-LED) display panel 100, etc. The present application does not limit this here. The above-described display panels 100 are all exemplified by the OLED display panel 100 to schematically illustrate some embodiments of the present application. It is easy to understand that the implementation manners of the present application are not limited thereto, and it may also be any other display panel 100 as long as it has the same technical concept.

[0077] On the other hand, as Figure 12 shown, an embodiment of the present disclosure further provides a display device 200. The display device 200 includes the display panel 100 provided in any embodiment of the present disclosure. The display device 200 provided in the embodiment of the present disclosure may be Figure 12 the mobile phone shown, or any electronic product with a display function, including but not limited to the following categories: television sets, laptop computers, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, in-vehicle displays, medical devices, industrial control devices, touch interaction terminals, etc. The embodiments of the present disclosure do not make special limitations on this.

[0078] For the specific implementation manners and technical effects of the display device 200 of the present disclosure, reference may be made to the specific embodiments of the above-mentioned display panel 100, and the repeated parts will not be elaborated.

[0079] In summary, for the display panel and the display device of the present disclosure, by disposing the first planarization layer on the side of the isolation column close to the display area, that is, the first planarization layer no longer extends to the step area, it is possible to avoid the peeling problem caused by the large-area contact between the first planarization layer of the organic material and the passivation layer of the inorganic material in the step area, and improve the service life of the display panel.

[0080] The above content is a further detailed description of the present disclosure in combination with specific alternative implementation manners. It cannot be determined that the specific implementation of the present disclosure is only limited to these descriptions. For those of ordinary skill in the technical field to which the present disclosure belongs, without departing from the concept of the present disclosure, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present disclosure.

Claims

1. A display panel, characterized in that, The display panel includes a display area and a non-display area, and the non-display area includes a stepped area; The display panel further includes: A passivation layer that covers the display area; A first planarization layer disposed on one side of the passivation layer; An isolation pillar, the isolation pillar and the first planarization layer are disposed on the same side of the passivation layer, the isolation pillar is further disposed in the non-display area and surrounds the display area, and the stepped area is disposed on the side of the isolation pillar away from the display area; The first planarization layer is disposed on the side of the isolation pillar close to the display area and covers the display area.

2. The display panel according to claim 1, wherein The display panel further includes: A light-emitting unit layer disposed on the side of the first planarization layer facing away from the passivation layer, and the light-emitting unit layer is further disposed in the display area; A second planarization layer disposed on the side of the light-emitting unit layer and the isolation pillar facing away from the first planarization layer, and the second planarization layer covers the display area and at least part of the stepped area.

3. The display panel according to claim 2, wherein The display panel further includes: An insulating layer disposed on the side of the second planarization layer facing away from the light-emitting unit layer, and the insulating layer covers the display area and at least part of the stepped area; the insulating layer is in surface contact with the passivation layer in the stepped area.

4. The display panel according to claim 1, wherein, The display panel further includes: A polarizer disposed on the side of the first planarization layer facing away from the passivation layer, and the polarizer covers the display area and part of the stepped area; A stepped sealant disposed in the stepped area, and the stepped sealant is adhesively bonded to the side surface of the polarizer disposed in the stepped area; Part of the first planarization layer is further disposed in the stepped area, and the first planarization layer disposed in the stepped area has a water vapor guiding channel formed by a linear groove; The water vapor guiding channel intersects with the edge of the polarizer disposed in the stepped area in the thickness direction of the display panel, and one end of the water vapor guiding channel is disposed at the cutting edge of the display panel.

5. The display panel according to claim 4, wherein The display panel further includes: a first metal layer disposed on the side of the passivation layer facing away from the first planarization layer; the first metal layer includes a cathode trace and an electrostatic protection trace that are electrically connected to each other; The electrostatic protection trace is disposed in the water vapor guiding channel and extends along the extending direction of the water vapor guiding channel.

6. The display panel according to claim 5, characterized in that, One end of the electrostatic protection trace is electrically connected to the cathode trace, and the other end extends to the cutting edge of the display panel.

7. The display panel according to claim 5, wherein, Part of the passivation layer is further disposed in the stepped area, and the passivation layer disposed in the stepped area covers at least the side surface of the electrostatic protection trace close to the side wall of the water vapor guiding channel.

8. The display panel according to claim 7, wherein The thickness of the passivation layer covering the electrostatic protection trace is greater than or equal to 2 micrometers.

9. The display panel according to claim 7, wherein The passivation layer disposed in the stepped area does not contact the first planarization layer that forms the water vapor guiding channel.

10. The display panel according to claim 5, wherein The first planarization layer that forms the water vapor guiding channel does not overlap with the first metal layer in the thickness direction of the display panel.

11. The display panel according to claim 4, characterized in that, In a direction perpendicular to the edge of the polarizer disposed in the stepped area, the extending width of the water vapor guiding channel is D1, and D1 ≥ 300 microns.

12. The display panel according to claim 4, wherein The display panel has at least two of the water vapor guiding channels; at least one of the water vapor guiding channels intersects with the edge of the polarizer disposed in the stepped area in the thickness direction of the display panel.

13. The display panel according to claim 4, characterized in that, At least a part of the water vapor guiding channel is in a cross shape.

14. The display panel according to claim 4, wherein The display panel further includes: an insulating layer, the insulating layer is disposed on a side of the first planarization layer and the isolation pillar away from the passivation layer, and the insulating layer covers the water vapor guiding channel; And / or, the display panel further includes: a touch protection layer, the touch protection layer is disposed on a side of the first planarization layer and the isolation pillar away from the passivation layer, and the touch protection layer covers the water vapor guiding channel.

15. The display panel according to claim 4, wherein, The display panel further includes: an insulating layer, the insulating layer is disposed on a side of the first planarization layer and the isolation pillar away from the passivation layer, and the insulating layer does not overlap with the water vapor guiding channel in the thickness direction of the display panel; And / or, the display panel further includes: a touch protection layer, the touch protection layer is disposed on a side of the first planarization layer and the isolation pillar away from the passivation layer, and the touch protection layer does not overlap with the water vapor guiding channel in the thickness direction of the display panel.

16. A display device, characterized in that, A display panel according to any one of claims 1 to 15 is included.

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