Display module and display device

Abstract

Embodiments of the present application provide a display module and a display device, and relate to the technical field of display, and are used for improving the electrostatic reliability of the display module. The display module comprises: a display panel comprising a display area and a non-display area; a polarizer located at the light-out side of the display panel, the polarizer comprising a conductive layer; the polaroid is at least partially located in the display area in the orthographic projection of the display panel; a ground pad, the orthographic projection of the ground pad in the plane of the display panel is located in the non-display area; an electrostatic liquid, the orthographic projection of the electrostatic liquid in the plane of the display panel is located in the non-display area; the electrostatic liquid is electrically connected with the conductive layer and the ground pad.

Description

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

[0002] With the continuous development of science and technology, more and more display devices are widely applied to people's daily life and work, becoming an important tool indispensable to people today. Moreover, with the continuous development of display technology, consumers' requirements for display effect of display are also increasing.

[0003] At present, in the production, testing and use process of the display panel, static electricity is easily generated at the edge position of the display panel, and the static electricity accumulates to a certain extent to cause static discharge phenomenon, resulting in abnormal brightening of the edge of the display panel. Moreover, if the static electricity is conducted to the inside of the display panel, the electronic devices in the display panel will be damaged.

[0004] Therefore, the embodiments of the present application provide a display module and a display device to timely conduct away the static electricity at the edge of the display module, avoid the static electricity entering the display area, improve the static electricity reliability of the display module, and improve the display effect of the display module.

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

[0006] a display panel, comprising a display area and a non-display area;

[0007] a polarizer located at the light-out side of the display panel, the polarizer comprising a conductive layer; the polarizer is at least partially located in the display area in the orthographic projection on the plane where the display panel is located;

[0008] a grounding pad, the orthographic projection of the grounding pad on the plane where the display panel is located is located in the non-display area;

[0009] a static electricity liquid, the orthographic projection of the static electricity liquid on the plane where the display panel is located is located in the non-display area; the static electricity liquid is electrically connected with the conductive layer and the grounding pad.

[0010] Optionally, the polarizer comprises a first end portion, the first end portion is located at the side of the polarizer away from the display area along the direction parallel to the plane where the display panel is located, the conductive layer is exposed to the first end portion, and the static electricity liquid is in contact with the first end portion.

[0011] Optionally, the static electricity liquid is in contact with the grounding pad.

[0012] Optionally, the static electricity liquid and the grounding pad at least partially overlap along the direction perpendicular to the plane where the display panel is located.

[0013] Optionally, the orthographic projection of the static electricity liquid on the plane where the display panel is located covers the grounding pad.​​​

[0014] Optionally, the display panel comprises a substrate, and an array film layer and a touch film layer which are arranged on the same side of the substrate in a stacked manner; the array film layer is located between the substrate and the touch film layer;

[0015] The touch film layer comprises a first touch conductive layer, and a distance between the first touch conductive layer and the substrate is greater than or equal to a distance between other conductive layers in the touch film layer and the substrate.

[0016] The ground pad comprises a first pad metal layer, and the first pad metal layer is arranged in the same layer as the first touch conductive layer.

[0017] Optionally, the touch film layer further comprises a first touch insulating layer, the first touch insulating layer is located on a side of the first touch conductive layer away from the substrate, the first touch insulating layer comprises a through hole, and the through hole overlaps the ground pad in a direction perpendicular to a plane in which the display panel is located.

[0018] Optionally, the electrostatic liquid at least partially fills the through hole.

[0019] Optionally, the polarizing sheet comprises a first end portion, the first end portion is located on a side of the polarizing sheet away from the display area in a direction parallel to a plane in which the display panel is located, the conductive layer is exposed to the first end portion, and the first end portion is located in the through hole.

[0020] Optionally, the polarizing sheet comprises a first end portion, the first end portion is located on a side of the polarizing sheet away from the display area in a direction parallel to a plane in which the display panel is located, the conductive layer is exposed to the first end portion, and the first end portion is located in the through hole.

[0021] In another aspect, the embodiment of the present application provides a display device comprising the display module.

[0022] The display module and the display device provided by the embodiment of the present application can make the static electricity generated in the process of electrostatic testing of the display module and in the process of use of the display device by a consumer conducted to the electrostatic liquid through the polarizing sheet, and then conducted to the ground pad through the electrostatic liquid, can improve the static electricity conduction efficiency in the display module, avoid the static electricity moving to the display area, avoid the influence of static electricity on the display of the display module, and avoid the problem of static electricity breakdown caused by accumulation of static electricity to a certain extent, and is beneficial to improving the display stability and reliability of the display module. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described in the following embodiments are only some embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on these drawings belong to the protection scope of the present application.

[0024] Figure 1 A top view of a display module provided by an embodiment of the present application is shown in FIG. 1.

[0025] Figure 2 A sectional view of the display module provided by the embodiment of the present application is shown in FIG. 2. Figure 1 Another sectional view of the display module provided by the embodiment of the present application is shown in FIG. 3. Another sectional view of the display module provided by the embodiment of the present application is shown in FIG. 4.

[0026] Another sectional view of the display module provided by the embodiment of the present application is shown in FIG. 5. Figure 3 Another sectional view of the display module provided by the embodiment of the present application is shown in FIG. 6. Figure 1 Another sectional view of the display module provided by the embodiment of the present application is shown in FIG. 7. Another sectional view of the display module provided by the embodiment of the present application is shown in FIG. 8.

[0027] Another sectional view of the display module provided by the embodiment of the present application is shown in FIG. 9. Figure 4 Another sectional view of the display module provided by the embodiment of the present application is shown in FIG. 10. Figure 1 Another sectional view of the display module provided by the embodiment of the present application is shown in FIG. 11. Another sectional view of the display module provided by the embodiment of the present application is shown in FIG. 12.

[0028] Another sectional view of the display module provided by the embodiment of the present application is shown in FIG. 13. Figure 5 A sectional view of a display area of a display panel provided by an embodiment of the present application is shown in FIG. 14. Another sectional view of the display area of the display panel provided by the embodiment of the present application is shown in FIG. 15.

[0029] Another sectional view of the display area of the display panel provided by the embodiment of the present application is shown in FIG. 16. Figure 6 Another sectional view of the display area of the display panel provided by the embodiment of the present application is shown in FIG. 17. Figure 1 Another sectional view of the display area of the display panel provided by the embodiment of the present application is shown in FIG. 18. Another sectional view of the display area of the display panel provided by the embodiment of the present application is shown in FIG. 19.

[0030] Another sectional view of the display area of the display panel provided by the embodiment of the present application is shown in FIG. 20. Figure 7 A sectional view of another display module provided by an embodiment of the present application is shown in FIG. 21. Another sectional view of the display module provided by the embodiment of the present application is shown in FIG. 22.

[0031] Another sectional view of the display module provided by the embodiment of the present application is shown in FIG. 23. Figure 8 A top view of another display module provided by an embodiment of the present application is shown in FIG. 24. Another sectional view of the display module provided by the embodiment of the present application is shown in FIG. 25.

[0032] Another sectional view of the display module provided by the embodiment of the present application is shown in FIG. 26. Figure 9 A top view of a display device provided by an embodiment of the present application is shown in FIG. 27.

DETAILED DESCRIPTION

[0033] In order to better understand the technical solutions of the present application, the following will describe the embodiments of the present application with reference to the drawings.

[0034] Detailed description.

[0035] It should be clear that the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0036] The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the description of the application and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0037] It should be understood that the term "and / or" used herein only describes an association relationship of associated objects, and means that three relationships can exist, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " herein generally represents that the front and rear associated objects are in an "or" relationship.

[0038] It should be understood that although the terms first, second, etc. can be used in the embodiments of the application to describe the pad metal layers, these pad metal layers should not be limited to these terms. These terms are only used to distinguish the pad metal layers from each other. For example, the first pad metal layer can also be referred to as the second pad metal layer, and similarly, the second pad metal layer can also be referred to as the first pad metal layer without departing from the scope of the embodiments of the application.

[0039] In the process of implementing the embodiments of the application, the inventors found that during the reliability verification of the display module by using a copper bar rubbing experiment, abnormal display problems of local brightening often occur in the edge area of the display module. Among them, the copper bar rubbing experiment is used to verify the stability of the display device such as a mobile phone during long-time screen scratching use. The specific test method is that on the basis of normal lighting of the mobile phone screen, the copper bar and other line scratching devices are made to scratch the surface of the mobile phone screen at a certain speed. The inventors found that when the copper bar and other line scratching devices rub the cover plate of the mobile phone, the cover plate generates static charges, and the static charges will have an induction effect on the devices in the display panel for driving the sub-pixel to light, causing the device characteristics to drift, thus causing the display panel to display abnormally in part.

[0040] Therefore, the embodiments of the application provide a display module, as shown in Figure 1 and Figure 2 as shown, Figure 1 is a top view schematic diagram of a display module provided by the embodiments of the application, Figure 2 is Figure 1A cross-sectional view along BB' shows that the display module includes a display panel 1. The display panel 1 includes a display area AA and a non-display area NA. The display area AA includes a plurality of sub-pixels (not shown). For example, the display panel 1 can be a display panel using a self-luminous technology, i.e., the sub-pixels can include any one of an organic light emitting diode (OLED), a quantum dot light emitting diode (QLED), and a micro light emitting diode (Micro-LED). Alternatively, the display panel 1 can be a liquid crystal display (LCD).

[0041] As shown in Figure 1 and Figure 2 , the display module further includes a polarizer 2 located at the light exit side of the display panel 1. The polarizer 2 includes a conductive layer 20, i.e., the polarizer 2 is a low-resistance polarizer. In the embodiment, the polarizer 2 not only has a light adjusting function, but also has a conductive function. For example, the conductive layer 20 includes any one of carbon nanotubes, transparent metal oxides, and nano-silver paste.

[0042] For example, as shown in Figure 1 , the polarizer 2 includes a first portion 21 and a second portion 22. The first portion 21 is located in the display area AA in the normal projection of the display panel 1. The second portion 22 is located in the non-display area NA in the normal projection of the display panel 1. Optionally, the first portion 21 and the second portion 22 are connected to each other. For example, the first portion 21 and the second portion 22 can be integrally formed.

[0043] As shown in Figure 1 and Figure 2 , the display module further includes a grounding pad 31 and an electrostatic liquid 4. The grounding pad 31 and the electrostatic liquid 4 are located in the non-display area NA in the normal projection of the display panel 1. The electrostatic liquid 4 has a conductive property. The electrostatic liquid 4 is electrically connected to the conductive layer 20 in the polarizer 2 and the grounding pad 31. The static electricity generated during the electrostatic test and the use of the display module can be transmitted to the electrostatic liquid 4 through the conductive layer 20 in the polarizer 2, and then transmitted to the grounding pad 31 from the electrostatic liquid 4, so as to be timely conducted away.

[0044] The display module provided by the embodiment of the present application comprises a polarizer 2 located at the light-out side of the display panel 1, and the polarizer 2 comprises a conductive layer 20, that is, the polarizer 2 has the conductive function in addition to the light-adjusting function. In addition, the embodiment of the present application sets a grounding pad 31 and an electrostatic liquid 4 in the non-display area NA of the display module, the normal projection of the electrostatic liquid 4 on the plane where the display panel 1 is located is located in the non-display area NA, and the electrostatic liquid 4 is electrically connected to the conductive layer 20 and the grounding pad 31. Based on the setting mode provided by the embodiment of the present application, the static electricity can be conducted to the electrostatic liquid 4 through the polarizer 2, and then conducted to the grounding pad 31 through the electrostatic liquid 4, so that the static electricity conduction efficiency in the display module can be improved, the static electricity can be prevented from moving into the display area AA, the influence of static electricity on the display of the display module can be avoided, and the problem of static electricity breakdown caused by the accumulation of static electricity to a certain extent can be avoided, thereby being beneficial to improving the display stability and reliability of the display module.

[0045] For example, the electrostatic liquid 4 comprises a conductive polymer material, and the conductive polymer material can comprise PEDOT:PSS. It should be noted that in the embodiment of the present application, the electrostatic liquid 4 can be formed in the non-display area NA by coating or printing, and then the electrostatic liquid 4 can be solidified according to the needs.

[0046] Optionally, in the embodiment of the present application, the second part 22 of the polarizer 2 and the electrostatic liquid 4 can be arranged corresponding to the grounding pad 31.

[0047] For example, as shown in Figure 1 , the embodiment of the present application can set at least one grounding pad 31 in the non-display area NA. When a plurality of grounding pads 31 are arranged in the non-display area NA, the electrostatic liquid 4 and the polarizer 2 are arranged corresponding to the position of each grounding pad 31.

[0048] Optionally, as shown in Figure 1 , the embodiment of the present application can at least partially surround the display area AA with the electrostatic liquid 4, and at least partially surround the display area AA with the second part 22 of the polarizer 2, so as to electrostatically protect the display area AA from multiple directions, improve the display effect of the display panel 1, and improve the electrostatic reliability of the display module.

[0049] For example, as shown in Figure 1 and Figure 2 , the polarizer 2 comprises a first end D1, and the first end D1 is located at the side of the polarizer 2 away from the display area AA in the direction parallel to the plane where the display panel 1 is located, that is, the first end D1 corresponds to the edge of the polarizer 2. In other words, the first end D1 can be regarded as the edge of the second part 22 away from the first part 21. In the embodiment of the present application, the conductive layer 20 is exposed to the first end D1. For example, as shown in Figure 1 and Figure 2As shown, the orthographic projection of the first end D1 onto the plane of the display panel 1 is located in the non-display area NA.

[0050] like Figure 2 As shown, the electrostatic liquid 4 contacts the first end D1 of the polarizer 2, thereby electrically connecting the electrostatic liquid 4 and the conductive layer 20 in the polarizer 2 to provide a path for static dissipation. When static electricity is generated in the display module, the static electricity can be transmitted through the conductive layer 20 in the polarizer 2 to the electrostatic liquid 4, which is electrically connected to the conductive layer 20, and then transmitted through the electrostatic liquid 4 to the grounding pad 31, thereby dissipating the static electricity. By making the electrostatic liquid 4 electrically connected to the first end D1 of the polarizer 2, this embodiment of the invention can increase the reliability of the electrical connection between the two and help reduce the transmission resistance of static electricity between them. In addition, by adopting this arrangement, when manufacturing the display module, the electrostatic liquid 4 can be formed by coating or printing according to the position of the first end D1 of the polarizer 2, that is, a position reference can be provided for the formation of the electrostatic liquid 4, improving the process yield. For example, as shown... Figure 2 As shown, the electrostatic liquid 4 is located on the side of the first end D1 of the polarizer 2 away from the display area AA.

[0051] In embodiments of the present invention, such as Figure 2 As shown, the first end D1 includes a first surface S1 located away from the display area AA. In this embodiment of the invention, as... Figure 2 As shown, along the direction away from the display panel, the distance between the first surface S1 and the display area AA remains unchanged; that is, the first surface S1 is perpendicular to the plane of the display panel. Or, as... Figure 3 As shown, Figure 3 for Figure 1 In another cross-sectional view along BB', in a direction away from the display panel, this embodiment of the invention allows the distance between the first surface S1 and the display area AA to gradually decrease. Based on this arrangement, the electrostatic liquid 4 can be better coated on the first surface S1, avoiding the formation of uncontacted dead zones between the electrostatic liquid 4 and the first surface S1, which helps to increase the contact area between the electrostatic liquid 4 and the conductive layer 20.

[0052] In embodiments of the present invention, such as Figure 2 and Figure 3 As shown, the electrostatic liquid 4 contacts the grounding pad 31 to electrically connect the electrostatic liquid 4 and the grounding pad 31, providing a path for static dissipation. By making the electrostatic liquid 4 and the grounding pad 31 electrically connected, this embodiment of the invention increases the reliability of the electrical connection and helps reduce the transmission resistance of static electricity between them. For example, as... Figure 2 and Figure 3As shown, the electrostatic liquid 4 is located on the side of the ground pad 31 facing the light-out side of the display panel 1. And, in the direction perpendicular to the plane where the display panel 1 is located, the electrostatic liquid 4 at least partially overlaps the ground pad 31, and the overlapping part corresponds to the contact electrical connection.

[0053] As shown, Figure 4 , Figure 4 As shown, Figure 1 In another cross-sectional view along BB', the embodiment of the present application can also make the electrostatic liquid 4 cover the ground pad 31 in the orthographic projection of the plane where the display panel 1 is located, so as to maximize the contact area between the electrostatic liquid 4 and the ground pad 31, reduce the contact resistance therebetween, and improve the conduction efficiency of the static electricity.

[0054] As shown, Figure 5 , Figure 5 As shown, the cross-sectional view of the display area of the display panel provided by the embodiment of the present application, the display panel 1 includes a substrate 10 and an array film layer 11, a display film layer 12 and a touch film layer 13 which are stacked on the same side of the substrate 10; the display film layer 12 is located on the side of the array film layer 11 away from the substrate 10, and the touch film layer 13 is located on the side of the display film layer 12 away from the array film layer 11. That is, the array film layer 11 is located between the substrate 10 and the touch film layer 13.

[0055] In the embodiment of the present application, the touch film layer 13 includes a first touch conductive layer 131. The distance between the first touch conductive layer 131 and the substrate 10 is greater than or equal to the distance between other conductive layers in the touch film layer 13 and the substrate 10. Figure 5 Taking the touch film layer 13 including the first touch conductive layer 131 and a second touch conductive layer 132 as an example, the second touch conductive layer 132 is located on the side of the first touch conductive layer 131 close to the substrate 10. Optionally, when the display panel is designed as a mutual-capacitive touch display panel, one of the first touch conductive layer 131 and the second touch conductive layer 132 includes a touch electrode block 14, and the other includes a bridge 15. The touch electrode block 14 includes a touch driving electrode and a touch sensing electrode. The bridge 15 is used to electrically connect two adjacent touch driving electrodes, or electrically connect two adjacent touch sensing electrodes. Figure 5 Taking the first touch conductive layer 131 including the bridge 15 and the second touch conductive layer 132 including the touch electrode block 14 as an example.

[0056] In combination with Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the ground pad 31 comprises a first pad metal layer 311, in the embodiment of the present application, the first pad metal layer 311 is arranged in the same layer as the first touch conductive layer 131. In this way, on one hand, the first pad metal layer 311 and the first touch conductive layer 131 can be formed in the same process by using the same patterning process, which is beneficial to simplify the manufacturing process of the display panel and realize the thin design of the display panel. On the other hand, the distance between the first pad metal layer 311 and the polarizer 2 in the direction perpendicular to the plane of the display panel 1 can be shortened, and when the electrostatic liquid 4 is arranged to electrically connect the first pad metal layer 311 and the polarizer 2, the thickness of the electrostatic liquid 4 can be reduced, which is beneficial to the preparation of the electrostatic liquid 4. In addition, the distance between the first pad metal layer 311 and the first touch conductive layer 131 can also be shortened, which is beneficial to the preparation of the display panel.

[0057] The electrostatic conduction path is beneficial to more quickly conduct away the static electricity.

[0058] Optionally, as shown in Figure 5 As shown, the display film layer 12 comprises a pixel definition layer 120, a first electrode 121, a light emitting layer 123 and a second electrode 122; the pixel definition layer 120 comprises an opening, the opening exposes at least part of the first electrode 121, and at least part of the light emitting layer 123 is located in the opening.

[0059] As shown in Figure 5 As shown, the array film layer 11 comprises a buffer layer 111, a semiconductor layer 112, a first insulating layer 113, a first metal layer M1, a second insulating layer 114, a second metal layer M2, a third insulating layer 115 and a third metal layer M3 arranged in layers.

[0060] As shown in Figure 6 As shown, Figure 6 As shown in Figure 1 As shown in another cross-sectional view along BB', the ground pad 31 further comprises a second pad metal layer 312, the second pad metal layer 312 is located on the side of the first pad metal layer 311 close to the substrate 10, and the second pad metal layer 312 and the first pad metal layer 311 are electrically connected through the via hole in the insulating layer 310 between the second pad metal layer 312 and the first pad metal layer 311.

[0061] Optionally, as shown in Figure 5 and Figure 6 As shown, the second pad metal layer 312 is arranged in the same layer as at least one of the first metal layer M1, the second metal layer M2 and the third metal layer M3.

[0062] Optionally, as shown in Figure 1 As shown, the display panel further comprises a touch trace 16. As shown in Figure 5The first touch conductive layer 131 or the second touch conductive layer 132 is shown, and a normal projection of the touch wire 16 on a plane where the display panel is located is at least partially located in the non-display area NA. The touch wire 16 is electrically connected to the touch electrode and the touch driving chip. As shown in Figure 1 As shown, the normal projection of the touch wire 16 on the plane where the display panel is located is located on a side of the electrostatic liquid 4 close to the display area AA. In this way, the static electricity generated from the edge of the display panel can be timely conducted away by the electrostatic liquid 4, thereby protecting the touch wire 16 from the static electricity.

[0063] As shown in Figure 5 As shown, the display panel 1 further includes an encapsulation layer 14, and the encapsulation layer 14 is located between the display film layer 12 and the touch film layer 13.

[0064] As shown in Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 As shown, the touch film layer 13 further includes a first touch insulating layer 171, and the first touch insulating layer 171 is located on a side of the first touch conductive layer 131 away from the substrate 10. As shown in Figure 2 Figure 3 Figure 4 Figure 6 As shown, the first touch insulating layer 171 includes a through hole H, and the through hole H is located in the non-display area NA and overlaps the ground pad 31 in a direction perpendicular to the plane where the display panel 1 is located. As shown in an example, the through hole H can be formed by etching the first touch insulating layer 171.

[0065] In the manufacturing of the display panel, after the first pad metal layer 311 is prepared, the first touch insulating layer 171 located above the first pad metal layer 311 can be etched to expose at least part of the first pad metal layer 311 and make the first pad metal layer 311 grounded, and then the attachment process of the polarizer 2 can be performed. After the attachment of the polarizer 2 is completed, the electrostatic liquid 4 can be coated. Based on the arrangement provided in the embodiment of the present application, at least part of the electrostatic liquid 4 can be accommodated in the through hole H, which is conducive to taking into account the volatility of the coating process when the electrostatic liquid 4 is prepared by the coating process, improves the position stability of the electrostatic liquid 4, makes the electrostatic liquid 4 more stably accommodated in the through hole H, avoids the electrostatic liquid 4 from flowing to other unwanted positions, ensures the stable electrical connection between the electrostatic liquid 4 and the polarizer 2 and the first pad metal layer 311, and reduces the precision requirement of the coating process.

[0066] As shown in an example, the depth d of the through hole H satisfies 1 μm≤d≤5 μm, and optionally, the depth d of the through hole H can satisfy 2 μm≤d≤4 μm, and as shown in an example, the depth d of the through hole H is 3 μm.

[0067] ​​​​​​​Optionally, the first touch insulation layer 171 comprises an organic layer, so as to effectively protect the first touch conductive layer 131 and reduce the difficulty of etching process of the through hole H.

[0068] As shown in Figure 2 , Figure 3 , Figure 4 and Figure 6 , the cross-sectional area of the through hole H gradually decreases along the direction in which the electrostatic liquid 4 points to the display panel 1, so that the electrostatic liquid 4 can be more stably accommodated in the through hole H.

[0069] Optionally, in the embodiment of the present application, the electrostatic liquid 4 at least partially fills the through hole H. Optionally, as shown in Figure 2 and Figure 3 , the embodiment of the present application can make the electrostatic liquid 4 partially fill the through hole H and the polarizer 2 partially fill the through hole H.

[0070] Optionally, as shown in Figure 2 and Figure 3 , the first end portion D1 of the polarizer 2 is orthogonally projected on the display panel plane and located in the through hole H. That is, the polarizer 2 extends from the display area AA to above the through hole H. In this way, the electrostatic liquid 4 and the polarizer 2 are in contact and electrically connected at the position corresponding to the through hole H, which is beneficial to increase the contact area of the electrostatic liquid 4 and the polarizer 2, reduce the contact resistance, and make the static electricity generated in the non-display area NA be more quickly conducted away through the conductive layer 20 in the polarizer 2.

[0071] Alternatively, as shown in Figure 4 , the embodiment of the present application can also make the through hole H be completely filled with the electrostatic liquid 4.

[0072] Optionally, as shown in Figure 4 , along the direction perpendicular to the display panel 1 plane, the first end portion D1 is staggered with the through hole H, and the first end portion D1 is located on the side of the through hole H close to the display area AA. In this way, when the polarizer 2 is attached, the flatness of the film layer below the polarizer 2 can be ensured, which is beneficial to ensure the attachment yield of the polarizer 2. Moreover, based on this arrangement, the coverage area of the electrostatic liquid 4 on the surface of the grounding pad 31 can be increased, which is beneficial to reduce the contact resistance between the electrostatic liquid 4 and the grounding pad 31.

[0073] Optionally, as shown in Figure 7 , Figure 7 is another cross-sectional view of a display module provided by the embodiment of the present application, and the display module further comprises a cover plate 5 covering the display panel 1. The cover plate 5 is located on the side of the polarizer 2 away from the display panel 1. Optionally, as shown in Figure 7As shown, the cover plate 5 is bonded to the polarizer 2 by optical adhesive 6. Optionally, the cover plate 5 can be a 3D curved cover plate, i.e., the edge portion of the cover plate 5 can be curved towards one side of the display panel 1. Alternatively, as shown in FIG. 1C, the cover plate 5 can be a flat cover plate. Figure 7 As shown, the cover plate 5 can also be a flat plate in the embodiments of the present application. In the process of electrostatic test or use of the display module, the static electricity generated on the surface of the cover plate 5 can be conducted to the polarizer 2 and then transmitted to the grounding pad 31 through the polarizer 2 and the static liquid.

[0074] Optionally, as shown in FIGS. 1D and 1E, Figure 2 , Figure 3 and Figure 4 the surface of the static liquid 4 away from the display panel 1 is coplanar with the surface of the polarizer 2 away from the display panel 1. That is, the distance between the surface of the static liquid 4 away from the display panel 1 and the display panel 1 is equal to the distance between the surface of the polarizer 2 away from the display panel 1 and the display panel 1. In this way, a flat bearing surface can be provided for the cover plate 5 or other structures located on the side of the polarizer 2 away from the display panel 1, which is conducive to improving the structural stability of the display module.

[0075] Optionally, as shown in FIG. 1F, Figure 7 the display module further comprises a first support film 71 and a second support film 72. The first support film 71 is located on the side of the display panel 1 away from the light-emitting side, and the second support film 72 is located on the side of the first support film 71 away from the display panel 1. The first support film 71 and the second support film 72 are used to support the display panel 1.

[0076] Optionally, the first support film 71 comprises polyimide. The second support film 72 comprises a metal foil.

[0077] Optionally, the metal foil is grounded. In the embodiments of the present application, the metal foil not only can support the display panel 1, but also can dissipate the heat generated by the display panel 1 during display, and in addition, the metal foil can also serve as a static electricity transmission path, which is conducive to increasing the dissipation path of static electricity in the display module.

[0078] Optionally, the metal foil comprises a copper foil and / or an aluminum foil, so that the metal foil has high electrical conductivity and good heat dissipation performance and ductility. When the display panel 1 is a flexible display panel, the copper foil and the aluminum foil can well adapt to the bending deformation of the display module.

[0079] Optionally, as shown in FIG. 1G, Figure 7As shown, the display module further comprises a foam layer 73. During movement or use of the display module, if the display module is impacted or subjected to other external forces, the foam layer can absorb stress, thereby buffering stress on the display panel 1 and protecting the display panel 1 from damage. Optionally, the foam layer 73 comprises super clean foam (SCF).

[0080] As shown in the example, Figure 8 As shown, Figure 8 As shown in another top view of the display module according to an embodiment of the present application, the display panel 1 further comprises a light-transmitting area TA, and the display area AA at least partially surrounds the light-transmitting area TA. The light-transmitting area TA has a light transmittance greater than that of other areas in the display area AA. In this embodiment, a light-sensing element such as a camera or an iris sensor can be provided corresponding to the light-transmitting area TA. External light can enter the light-sensing element through the light-transmitting area TA. In this embodiment, at least part of the electrostatic liquid 4 and / or at least part of the polarizer 2 surrounds the light-transmitting area TA. Figure 8 As shown, the electrostatic generated in the periphery of the light-transmitting area TA can be conducted away through the electrostatic liquid 4 or the polarizer 2, thereby further improving the electrostatic reliability of the display panel.

[0081] As shown in the example, Figure 9 As shown, Figure 9 As shown in a schematic diagram of a display device according to an embodiment of the present application, the display device comprises the display module 100 described above. The specific structure of the display module 100 has been described in detail in the above embodiments, and will not be described again here. Of course, Figure 9 As shown, the display device is merely illustrative. The display device can be any electronic device having a display function, such as a mobile phone, a tablet computer, a notebook computer, an e-paper, or a television.

[0082] The display device according to an embodiment of the present application can improve the electrostatic conduction efficiency in the display device, avoid the electrostatic charge from moving into the display area, avoid the influence of static electricity on the display of the display device, and avoid the problem of electrostatic discharge caused by accumulation of electrostatic charge to a certain extent, thereby improving the display stability and reliability of the display device.

[0083] The above merely provides the preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A display module, characterized by The display module comprises: a display panel comprising a display area and a non-display area; a polarizer located on the light-emitting side of the display panel, the polarizer comprising a conductive layer; the polarizer is at least partially located in the display area in the orthographic projection of the plane in which the display panel is located; the polarizer comprises a first end portion, which is located on the side of the polarizer away from the display area in the direction parallel to the plane in which the display panel is located, and the conductive layer is exposed at the first end portion; the polarizer is a laminated structure; a ground pad, the orthographic projection of the ground pad in the plane in which the display panel is located is located in the non-display area; an electrostatic liquid, the orthographic projection of the electrostatic liquid in the plane in which the display panel is located is located in the non-display area; the electrostatic liquid is electrically connected to the conductive layer and the ground pad; wherein the first end portion comprises a first surface away from the display area; In the direction away from the display panel, the distance between the first surface and the display area is constant, or the distance between the first surface and the display area gradually decreases.

2. The display module according to claim 1, wherein: the electrostatic liquid is in contact with the first end portion.

3. The display module according to claim 2, wherein: the electrostatic liquid is in contact with the ground pad.

4. The display module according to claim 3, wherein: in the direction perpendicular to the plane in which the display panel is located, the electrostatic liquid at least partially overlaps the ground pad.

5. The display module according to claim 4, wherein: the orthographic projection of the electrostatic liquid in the plane in which the display panel is located covers the ground pad.

6. The display module according to claim 1, wherein: the display panel comprises a substrate and an array film layer and a touch film layer which are laminated on the same side of the substrate; the array film layer is located between the substrate and the touch film layer; the touch film layer comprises a first touch conductive layer, the distance between the first touch conductive layer and the substrate is greater than or equal to the distance between other conductive layers in the touch film layer and the substrate; the ground pad comprises a first pad metal layer, the first pad metal layer is provided in the same layer as the first touch conductive layer.

7. The display module according to claim 6, wherein: the touch film layer further comprises a first touch insulating layer, the first touch insulating layer is located on the side of the first touch conductive layer away from the substrate, and the first touch insulating layer comprises a through hole, which overlaps the ground pad in the direction perpendicular to the plane in which the display panel is located.

8. The display module according to claim 7, wherein: the electrostatic liquid at least partially fills the through hole.

9. The display module according to claim 7, wherein: the orthographic projection of the first end portion in the plane in which the display panel is located is located in the through hole.

10. The display module according to claim 7, wherein: in the direction perpendicular to the plane in which the display panel is located, the first end portion is staggered with the through hole.

11. A display device comprising: The display module according to any one of claims 1-10.

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