OLED display module and OLED display device

Abstract

The present application provides an OLED display module and an OLED display device; the OLED display module is provided with a second groove and a second protrusion on a side of a pressure-sensitive adhesive close to a foam layer, and the projection of the first groove on the heat dissipation layer overlaps with the projection of the second protrusion on the heat dissipation layer, and the projection of the first protrusion on the heat dissipation layer overlaps with the projection of the second groove on the heat dissipation layer, and the side of the pressure-sensitive adhesive away from the foam layer exceeds the first groove, and the flatness of the side of the pressure-sensitive adhesive away from the foam layer is greater than the flatness of the side in contact with the foam layer, so that the second protrusion can fill the first groove, and the second groove can cooperate with the first protrusion, so as to flatten the protrusions and grooves of the foam layer, alleviate or even eliminate the unevenness on both sides of the pressure-sensitive adhesive caused by the uneven surface of the foam layer, thereby avoiding damage to the OLED display panel due to unevenness.

Description

Technical Field

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

[0002] OLED (Organic Light-Emitting Diode) display devices are widely used due to their advantages such as self-luminescence and flexibility. In order to protect the OLED display panel, the existing OLED display device will set a composite film under the OLED display panel, improve the heat dissipation effect through the heat dissipation layer in the composite film, and improve the impact resistance through the foam layer in the composite film. Specifically, the layers in the composite film will be combined together by bonding, but in the process of preparing the foam layer, the surface of the foam layer often has uneven problems. In the process of bonding the foam layer and the heat dissipation layer, the heat dissipation layer also has uneven problems. Finally, in the process of bonding the composite film and the OLED display panel, the OLED display panel also has uneven problems, which damages the OLED display panel and leads to poor appearance quality.

[0003] Therefore, the existing OLED display device has the problem that the OLED display panel becomes uneven due to the uneven surface of the foam layer. Summary of the invention

[0004] The embodiments of the present application provide an OLED display module and an OLED display device, which are used to alleviate the problem of uneven surface of an OLED display panel caused by uneven surface of a foam layer in existing OLED display devices.

[0005] The embodiment of the present application provides an OLED display module, which includes:

[0006] OLED display panel;

[0007] A foam layer, disposed on one side of the OLED display panel;

[0008] A pressure-sensitive adhesive is disposed on a side of the foam layer away from the OLED display panel;

[0009] A heat dissipation layer, arranged on a side of the pressure-sensitive adhesive away from the foam layer;

[0010] Among them, the foam layer is provided with a first groove and a first protrusion on the side in contact with the pressure-sensitive adhesive, and the pressure-sensitive adhesive is provided with a second groove and a second protrusion on the side in contact with the foam layer, the projection of the first groove on the heat dissipation layer overlaps with the projection of the second protrusion on the heat dissipation layer, the projection of the first protrusion on the heat dissipation layer overlaps with the projection of the second groove on the heat dissipation layer, the side of the pressure-sensitive adhesive away from the foam layer exceeds the first groove, and the flatness of the pressure-sensitive adhesive on the side away from the foam layer is greater than the flatness of the side of the pressure-sensitive adhesive in contact with the foam layer.

[0011] In some embodiments, there is a gap between a surface of the pressure-sensitive adhesive close to the foam layer and a surface of the foam layer close to the pressure-sensitive adhesive.

[0012] In some embodiments, the first grooves and the first protrusions are alternately arranged, and a width of the first protrusions is smaller than a width of the first grooves.

[0013] In some embodiments, the second protrusions and the second grooves are alternately arranged, the width of the second protrusions is smaller than the width of the first grooves, the width of the second grooves is larger than the width of the first protrusions, the top of the second protrusions contacts the first grooves, and there is a gap between at least one side of the second protrusions and the side corresponding to the first grooves.

[0014] In some embodiments, the thickness of the second protrusion is greater than the depth of the first groove, and the depth of the second groove is greater than the thickness of the first protrusion.

[0015] In some embodiments, at least one side surface of the second protrusion contacts a corresponding side surface of the second groove, and a vertex of the first protrusion and an edge of the second protrusion are located in the same vertical plane.

[0016] In some embodiments, the second protrusions and the second grooves are alternately arranged, the width of the second protrusions is greater than the width of the first grooves, the width of the second grooves is less than the width of the first protrusions, at least two side surfaces of the second protrusions are in contact with the side surfaces corresponding to the first grooves, and there is a gap between the vertex of the second protrusions and the first grooves.

[0017] In some embodiments, the first grooves and the first protrusions are alternately arranged, and the width of the first protrusions is greater than or equal to the width of the first grooves.

[0018] In some embodiments, the second protrusions and the second grooves are alternately arranged, the width of the second protrusions is smaller than the width of the first grooves, the width of the second grooves is larger than the width of the first protrusions, the bottom surface of the second grooves contacts the top of the first protrusions, and there is a gap between at least one side surface of the second groove and the side surface corresponding to the first protrusion.

[0019] In some embodiments, the surface of the pressure-sensitive adhesive close to the foam layer is in contact with the surface of the foam layer close to the pressure-sensitive adhesive at any location.

[0020] In some embodiments, the OLED display module further includes a reinforcement layer, wherein the reinforcement layer is disposed between the pressure-sensitive adhesive and the heat dissipation layer, and a contact surface between the pressure-sensitive adhesive and the reinforcement layer is a plane.

[0021] At the same time, an embodiment of the present application provides an OLED display device, which includes the OLED display module and the driving chip described in any one of the above embodiments.

[0022] Beneficial effects: The present application provides an OLED display module and an OLED display device; the OLED display module includes an OLED display panel, a foam layer, a pressure-sensitive adhesive and a heat dissipation layer, the foam layer is arranged on one side of the OLED display panel, the pressure-sensitive adhesive is arranged on the side of the foam layer away from the OLED display panel, the heat dissipation layer is arranged on the side of the foam layer away from the OLED display panel, and the heat dissipation layer is arranged on the side of the pressure-sensitive adhesive away from the foam layer, wherein the foam layer is provided with a first groove and a first protrusion on the side in contact with the pressure-sensitive adhesive, the pressure-sensitive adhesive is provided with a second groove and a second protrusion on the side in contact with the foam layer, the projection of the first groove on the heat dissipation layer overlaps with the projection of the second protrusion on the heat dissipation layer, the projection of the first protrusion on the heat dissipation layer overlaps with the projection of the second groove on the heat dissipation layer, the side of the pressure-sensitive adhesive away from the foam layer exceeds the first groove, and the flatness of the pressure-sensitive adhesive on the side away from the foam layer is greater than the flatness of the side of the pressure-sensitive adhesive in contact with the foam layer. In the present application, the pressure-sensitive adhesive is provided with a second groove and a second protrusion on the side close to the foam layer, and the projection of the first groove on the heat dissipation layer overlaps with the projection of the second protrusion on the heat dissipation layer, and the projection of the first protrusion on the heat dissipation layer overlaps with the projection of the second groove on the heat dissipation layer, and the side of the pressure-sensitive adhesive away from the foam layer exceeds the first groove, and the flatness of the side of the pressure-sensitive adhesive away from the foam layer is greater than the flatness of the side in contact with the foam layer. The second protrusion can fill the first groove, and the second groove can cooperate with the first protrusion, so as to level the protrusions and grooves of the foam layer, alleviate or even eliminate the unevenness on both sides of the pressure-sensitive adhesive caused by the uneven surface of the foam layer, thereby avoiding damage to the OLED display panel due to unevenness. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the structure of the composite film corresponding to the composite film preparation process of the existing OLED display device.

[0025] Figure 2 This is a first schematic diagram of an OLED display module provided in an embodiment of the present application.

[0026] Figure 3 This is a second schematic diagram of an OLED display module provided in an embodiment of the present application.

[0027] Figure 4 This is a third schematic diagram of an OLED display module provided in an embodiment of the present application.

[0028] Figure 5 This is a schematic structural diagram of the corresponding composite film in the composite film preparation process in the OLED display module provided in an embodiment of the present application.

[0029] Figure 6 A schematic diagram of an OLED display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0031] like Figure 1 As shown, during the preparation process of the composite film in the existing OLED display device, the foam layer 11 is foamed, resulting in grooves / protrusions 111 on the foam layer 11, resulting in the phenomenon of "orange peel defect", such as Figure 1 As shown in (a) in the figure, when the foam layer 11 is bonded to the polyimide layer (not shown) and the copper layer 13 through the adhesive layer 12, due to the pressing action during the bonding process and the lack of fluidity of the copper layer 13, the "orange peel" phenomenon after the foam layer 11 and the copper layer 13 are bonded is transmitted to the copper layer 13, as shown in FIG. Figure 1As shown in (b), there are grooves / protrusions 111 on each layer of the composite film, resulting in an uneven surface of the composite film. When the composite film is attached to the OLED display panel, the "orange peel defect" is transferred to the OLED display panel, resulting in problems such as broken wires and offset of the luminescent material in the OLED display panel, resulting in poor display and poor appearance quality of the OLED display device. Therefore, the existing OLED display device has the problem of uneven OLED display panels caused by the uneven surface of the foam layer.

[0032] In view of the above technical problems, the embodiments of the present application provide an OLED display module and an OLED display device to alleviate the above technical problems.

[0033] like Figure 2 , Figure 3 As shown, the embodiment of the present application provides an OLED display module, and the OLED display module 2 includes:

[0034] OLED display panel 20;

[0035] A foam layer 32 is disposed on one side of the OLED display panel 20;

[0036] A pressure-sensitive adhesive 33 is disposed on a side of the foam layer 32 away from the OLED display panel 20;

[0037] The heat dissipation layer 35 is disposed on a side of the pressure-sensitive adhesive 33 away from the foam layer 32;

[0038] Among them, the foam layer 32 is provided with a first groove 321 and a first protrusion 322 on the side in contact with the pressure-sensitive adhesive 33, and the pressure-sensitive adhesive 33 is provided with a second groove 332 and a second protrusion 331 on the side in contact with the foam layer 32, the projection of the first groove 321 on the heat dissipation layer 35 coincides with the projection of the second protrusion 331 on the heat dissipation layer 35, the projection of the first protrusion 322 on the heat dissipation layer 35 coincides with the projection of the second groove 332 on the heat dissipation layer 35, the side of the pressure-sensitive adhesive 33 away from the foam layer 32 exceeds the first groove 321, and the flatness of the pressure-sensitive adhesive 33 on the side away from the foam layer 32 is greater than the flatness of the side of the pressure-sensitive adhesive 33 in contact with the foam layer 32.

[0039] An embodiment of the present application provides an OLED display module, which provides a second groove and a second protrusion on a side of the pressure-sensitive adhesive close to the foam layer, and makes the projection of the first groove on the heat dissipation layer overlap with the projection of the second protrusion on the heat dissipation layer, and makes the projection of the first protrusion on the heat dissipation layer overlap with the projection of the second groove on the heat dissipation layer, and the side of the pressure-sensitive adhesive away from the foam layer exceeds the first groove, and the flatness of the side of the pressure-sensitive adhesive away from the foam layer is greater than the flatness of the side in contact with the foam layer. The second protrusion can fill the first groove, and the second groove can cooperate with the first protrusion, so as to level the protrusions and grooves of the foam layer, alleviate or even eliminate the unevenness on both sides of the pressure-sensitive adhesive caused by the uneven surface of the foam layer, thereby avoiding damage to the OLED display panel due to unevenness.

[0040] It can be understood that the projection of the first groove on the heat dissipation layer overlaps with the projection of the second protrusion on the heat dissipation layer, and the projection of the first protrusion on the heat dissipation layer overlaps with the projection of the second groove on the heat dissipation layer. The side of the pressure-sensitive adhesive away from the foam layer exceeds the first groove, and the second protrusion must be filled in the first groove of the foam layer to reduce the unevenness of the foam layer. At the same time, the first protrusion must be located in the second groove, which can avoid the first protrusion from having a lifting effect on other film layers, and can alleviate or even eliminate the influence of the unevenness of the foam layer on other film layers, and avoid the unevenness of grooves in other film layers. The flatness of the side of the pressure-sensitive adhesive close to the heat dissipation layer is greater than the flatness of the side of the pressure-sensitive adhesive in contact with the foam layer. After the pressure-sensitive adhesive and the foam layer are bonded, the surface of the side where the pressure-sensitive adhesive is combined with the other film layers has improved flatness due to the setting of the second protrusion and the second groove, which alleviates or even eliminates the influence on the flatness of the OLED display panel, thereby avoiding damage to the OLED display panel due to unevenness.

[0041] It should be noted that due to Figure 2 The first groove and the second protrusion cooperate, and the first protrusion and the second groove cooperate, so in Figure 2 The first groove, the first protrusion, the second groove and the second protrusion are not shown in FIG. Figure 2 It can be seen from the boundary between the foam layer 32 and the pressure-sensitive adhesive 33 that the foam layer 32 and the pressure-sensitive adhesive 33 exist respectively. Figure 3 The first groove 321 , the first protrusion 322 , the second groove 332 , and the second protrusion 331 are shown.

[0042] In one embodiment, there is a gap between the surface of the pressure-sensitive adhesive close to the foam layer and the surface of the foam layer close to the pressure-sensitive adhesive. By making the gap between the surface of the pressure-sensitive adhesive close to the foam layer and the surface of the foam layer close to the pressure-sensitive adhesive, even if the pressure-sensitive adhesive and the foam layer cannot be bonded, the second protrusion fills the first groove, and the second groove cooperates with the first protrusion, so that the pressure-sensitive adhesive is deformed at fewer locations and the degree of deformation is smaller, so that during the transfer process, the deformation of each film layer in the composite film is reduced in turn, and finally when bonding with the OLED display panel, the unevenness on the foam layer will not be transferred to the OLED display panel, or even if it is transferred to the OLED display panel, because it is not obvious macroscopically and the degree of deformation of each layer is small, it will not have a negative impact on the appearance and display function of the OLED display panel.

[0043] In one embodiment, the first grooves and the first protrusions are arranged alternately, and the width of the first protrusions is smaller than the width of the first grooves. For the foam layer in which the first protrusions and the first grooves are arranged alternately, and the width of the first protrusions is smaller than the width of the first grooves, a pressure-sensitive adhesive can be designed accordingly to wrap the first protrusions and fill the first grooves, so as to alleviate or even eliminate the unevenness on both sides of the pressure-sensitive adhesive caused by the unevenness of the foam layer.

[0044] In order to solve the problem that the grooves on the foam layer cause deformation and defects when the subsequent film layer is attached, in one embodiment, Figure 4 As shown, the second protrusion 331 and the second groove are arranged alternately, the width L6 of the second protrusion 331 is smaller than the width of the first groove 321, the width of the second groove is larger than the width of the first protrusion, and the top of the second protrusion 331 contacts the first groove 321, and there is a gap between at least one side of the second protrusion 331 and the side corresponding to the first groove 321. By making the width of the second protrusion smaller than the width of the first groove, and the top of the second protrusion contacts the first groove, the first groove is filled with the second protrusion to flatten the first groove. Although there is a gap between the side of the second protrusion and the first groove, the top of the second protrusion contacts the first groove to provide support, so that even if deformation occurs, the degree of deformation will be small, so that the unevenness on the foam layer will not be transferred to the OLED display panel, thereby improving the yield of the OLED display panel.

[0045] Specifically, Figure 4 As shown, when the second protrusion 331 is provided, the volume of the second protrusion in the first groove can be made smaller than the volume of the first groove (in Figure 4In the figure, the width L6 of the second protrusion 331 is smaller than the width L5 of the first groove 321. Although the second protrusion cannot completely fill the first groove at this time, due to the small gap between the first groove and the second protrusion, the pressure-sensitive adhesive layer may not be deformed due to the stiffness of the material itself. Even if the pressure-sensitive adhesive layer is deformed due to the gap, the deformation occurs at fewer locations and the degree of deformation is small. Therefore, during the transfer process, the deformation of each film layer in the composite film is reduced successively. Finally, when the composite film is bonded to the OLED display panel, the unevenness on the foam layer will not be transferred to the OLED display panel. Even if it is transferred to the OLED display panel, it will not be obvious macroscopically and the degree of deformation of each layer is small, so it will not have a negative impact on the appearance and display function of the OLED display panel.

[0046] The lower depth of the second protrusion may lead to greater deformation of the pressure-sensitive adhesive and the film layer prepared subsequently. Figure 4 As shown, the thickness H4 of the second protrusion 331 is greater than the depth H3 of the first groove 321, and the depth of the second groove is greater than the thickness of the first protrusion. By making the depth of the second protrusion greater than the depth of the first groove, the second protrusion contacts the foam layer, and when the second protrusion fills the first groove, even if the second protrusion cannot completely fill the first groove, the contact position between the second protrusion and the first groove will provide support, so that the gaps on both sides of the second protrusion and the first groove may not cause the pressure-sensitive adhesive to deform downward, and even if the gaps on both sides of the second protrusion and the first groove cause the pressure-sensitive adhesive to deform downward, the deformation degree of the pressure-sensitive adhesive is small due to the small gap, so that the uneven surface of the foam layer does not affect the appearance and display function of the OLED display panel, and because the thickness of the second protrusion is relatively thick, the rigidity of the pressure-sensitive adhesive is further improved to avoid the collapse of the pressure-sensitive adhesive and the unevenness.

[0047] The problem that the second protrusion contacts the first groove only at the top will cause the pressure-sensitive adhesive to collapse. In one embodiment, at least one side of the second protrusion contacts the side corresponding to the second groove, and the vertex of the first protrusion and the edge of the second protrusion are located in the same vertical plane. By making the second protrusion contact the first groove at the top, and at least one side of the second protrusion contacts the side corresponding to the second groove, the contact area between the second protrusion and the second groove is increased, and the gap between the pressure-sensitive adhesive and the foam layer is reduced, the pressure-sensitive adhesive can further smooth the uneven part of the foam layer, further reduce the possibility of uneven pressure-sensitive adhesive, and improve the yield of the OLED display module.

[0048] Specifically, in the process of setting the second protrusion, the second protrusion and the first groove are arc surfaces, and the second protrusion and the first groove can be divided into four side surfaces: front, back, left and right. It can be understood that the four side surfaces do not limit the shape of the second protrusion and the first groove, but are only used as a description of the second protrusion and the first groove. When the side surfaces of the second protrusion and the first groove contact, any of the four side surfaces of the front, back, left and right can be in contact, and the contact method can be complete surface fitting, or it can be multi-point contact or line contact, and the setting is performed based on the flattening of the protrusions and grooves of the foam layer.

[0049] Aiming at the problem that the grooves on the foam layer cause deformation and defects when the subsequent film layers are bonded. In one embodiment, the second protrusion and the second groove are arranged alternately, the width of the second protrusion is greater than the width of the first groove, the width of the second groove is less than the width of the first protrusion, at least two side surfaces of the second protrusion are in contact with the side surfaces corresponding to the first groove, and there is a gap between the vertex of the second protrusion and the first groove. By making at least two side surfaces of the second protrusion contact with the side surfaces corresponding to the first groove, when the pressure-sensitive adhesive flattens the grooves of the foam layer, the pressure-sensitive adhesive can be supported by contact with at least two side surfaces of the first groove. Even if there is a gap between the second protrusion and the bottom surface of the first groove, due to the support of the contact surfaces on both sides, the shape of the pressure-sensitive adhesive can still be maintained, that is, the flatness of the side of the pressure-sensitive adhesive in contact with the other film layers is higher, and the pressure-sensitive adhesive will not be uneven, which will cause the OLED display panel to be uneven, thereby improving the yield of the OLED display module.

[0050] In one embodiment, the width of the second protrusion is equal to the width of the first groove, the thickness of the second protrusion is greater than the depth of the first groove, and the top of the second protrusion contacts the first groove. When the thickness of the second protrusion is greater than the depth of the first groove, the width of the second protrusion is equal to the width of the first groove, so that the contact area between the pressure-sensitive adhesive and the foam layer can be further increased, the supporting effect of the pressure-sensitive adhesive can be improved, and the gap between the second protrusion and the first groove can be further reduced, so as to avoid the pressure-sensitive adhesive from falling and deforming or the deformation of the pressure-sensitive adhesive from falling and deforming too much, thereby avoiding deformation of the OLED display panel.

[0051] In one embodiment, the first grooves and the first protrusions are arranged alternately, and the width of the first protrusions is greater than or equal to the width of the first grooves. When the width of the first protrusions is greater than or equal to the width of the first grooves, the first protrusions can be wrapped and the foam layer can be flattened to prevent the pressure-sensitive adhesive from falling and deforming or the deformation of the pressure-sensitive adhesive is too large.

[0052] In order to solve the problem that the protrusions on the foam layer cause deformation and defects when the subsequent film layer is attached, in one embodiment, the second protrusions and the second grooves are arranged alternately, the width of the second protrusions is smaller than the width of the first grooves, the width of the second grooves is larger than the width of the first protrusions, and the bottom surface of the second grooves is in contact with the top surface of the first protrusions, and there is a gap between at least one side surface of the second groove and the side surface corresponding to the first protrusion. By making the bottom surface of the second groove contact with the top of the first protrusion, and the width of the first protrusion is greater than or equal to the width of the first groove, the foam layer can be flattened by wrapping the first protrusion with the second groove. At this time, the second protrusion can also fill into the first groove to further flatten the foam layer. Although there is a gap between the second groove and the first protrusion, the contact position of the second groove and the first protrusion will provide support, so that the gap on both sides of the second groove and the first protrusion may not cause the pressure-sensitive adhesive to deform downward. Even if the gap on both sides of the second groove and the first protrusion causes the pressure-sensitive adhesive to deform downward, due to the small gap, the deformation degree of the pressure-sensitive adhesive is small, so that the uneven surface of the foam layer will not affect the appearance and display function of the OLED display panel.

[0053] Specifically, when there is a portion of the second groove that is not in contact with the first protrusion, since the second groove wraps at least a portion of the first protrusion, the gap between the second groove and the first protrusion is smaller, and the portion of the first protrusion in contact with the second groove plays a supporting role. Through the support of the first protrusion and the support of the pressure-sensitive adhesive material itself, the pressure-sensitive adhesive and other film layers may not be deformed; even if the pressure-sensitive adhesive and other film layers are deformed, the deformation of the pressure-sensitive adhesive is smaller due to the smaller gap between the second groove and the first protrusion. Since each film layer has a certain rigidity, the deformation of each film layer in the composite film is reduced successively during the transfer process. Finally, when the composite film is bonded to the OLED display panel, the unevenness on the foam layer will not be transferred to the OLED display panel. Even if it is transferred to the OLED display panel, it will not be obvious macroscopically and the deformation of each layer is smaller, so it will not have a negative impact on the appearance and display function of the OLED display panel.

[0054] The poor fit between the second protrusion and the first groove may cause the pressure-sensitive adhesive and other film layers to still be deformed. In one embodiment, the surface of the pressure-sensitive adhesive close to the foam layer fits with the surface of the foam layer close to the pressure-sensitive adhesive at any point. By making the surface of the pressure-sensitive adhesive close to the foam layer fit with the surface of the foam layer close to the pressure-sensitive adhesive at any point, that is, the second protrusion of the pressure-sensitive adhesive can completely fill the first groove, and the second groove can completely wrap the first protrusion, the contact between the pressure-sensitive adhesive and the foam layer is smooth, the pressure-sensitive adhesive will not be deformed, and when setting other film layers, since there is no gap between the pressure-sensitive adhesive and the foam layer, the other film layers will not be deformed, thereby avoiding the unevenness of the foam layer from being transmitted to the OLED display panel, avoiding the OLED display panel from having poor appearance or display.

[0055] Specifically, Figure 2 , Figure 3 As shown, the width L2 of the projection of the second protrusion 331 on the heat dissipation layer 35 is equal to the width L1 of the projection of the first groove 321 on the heat dissipation layer 35, and the thickness H2 of the second protrusion 331 is equal to the depth H1 of the first groove 321, the width L4 of the projection of the second groove 332 on the heat dissipation layer 35 is equal to the width L3 of the projection of the first protrusion 322 on the heat dissipation layer 35, and the depth H2 of the second groove 332 is equal to the thickness H1 of the first protrusion 322. By making the width of the projection of the second protrusion on the heat dissipation layer equal to the width of the projection of the first groove on the heat dissipation layer, and making the thickness of the second protrusion equal to the depth of the first groove, the second protrusion cooperates with the first groove, and the second protrusion can be completely filled in the first groove. By making the width of the projection of the second groove on the heat dissipation layer equal to the width of the projection of the first protrusion on the heat dissipation layer, and the depth of the second groove equal to the depth of the first protrusion, the second groove cooperates with the first protrusion, and the second groove can completely wrap the first protrusion. Then, the contact between the pressure-sensitive adhesive and the foam layer is smooth, the pressure-sensitive adhesive will not be deformed, and when other film layers are set, since the contact between the pressure-sensitive adhesive and the foam layer is foam, the other film layers will not be deformed, thereby preventing the unevenness of the foam layer from being transmitted to the OLED display panel, and preventing the OLED display panel from having poor appearance or display.

[0056] Specifically, the second protrusion fully fills the first groove, so there is no gap between the first groove and the second protrusion, and the second groove fully fills the first protrusion, so there is no gap between the second groove and the first protrusion. The contact point between the first groove and the second protrusion, and the contact point between the second groove and the first protrusion are finally flat, so the pressure-sensitive adhesive can fall without gaps and will not be deformed due to the existence of gaps when under pressure, thereby avoiding deformation caused by poor fit between the first groove and the second protrusion.

[0057] It should be noted that since the embodiment of the present application is described in detail by taking the protrusion and the groove as an example. Figure 3 In the embodiment, the thickness of the first protrusion 322 and the first groove 321 are both H1, and the depths of the second protrusion 331 and the second groove 332 are both H2, but the embodiments of the present application are not limited thereto. For example, if the protrusion and the groove are formed discontinuously, the thickness of the first protrusion and the depth of the second groove will be different. Accordingly, the thickness of the second protrusion and the depth of the second groove can be adaptively changed, so that the second protrusion cooperates with the first groove, and the second groove cooperates with the first protrusion.

[0058] In one embodiment, after the pressure-sensitive adhesive is formed, it can be bonded to the foam layer so that the second protrusion cooperates with the first groove, and the second groove cooperates with the first protrusion. The first groove can be filled by the second protrusion, and the second groove can cooperate with the first protrusion, thereby alleviating or even solving the unevenness on both sides of the pressure-sensitive adhesive caused by the uneven surface of the foam layer, thereby avoiding damage to the OLED display panel due to unevenness.

[0059] It should be noted that the embodiment of the present application is described in detail with the flatness of the side of the foam layer close to the OLED display module being greater than the flatness of the side of the foam layer close to the pressure-sensitive adhesive layer. This is because when the film layers in the composite film are bonded together, the unevenness on the foam layer will exist on the side away from the machine, and even if there is unevenness on the side close to the machine, it will be transferred to the side of the foam layer away from the machine or substrate due to the compression of the substrate or machine under the foam layer. When other film layers are bonded to the foam layer, they must be bonded to the side of the foam layer that is not in contact with the substrate or machine. Therefore, the unevenness in the foam layer will be transferred to other film layers and finally to the OLED display panel. However, the embodiment of the present application is not limited to this. For example, when the surface of the side of the foam layer close to the OLED display panel is uneven, the adhesive layer can be designed, and the specific design method can adopt the design method of the pressure-sensitive adhesive described in the above embodiment.

[0060] After the pressure-sensitive adhesive is prepared, the pressure-sensitive adhesive is laminated with the foam layer, which may result in poor coordination between the pressure-sensitive adhesive and the foam layer. In one embodiment, the pressure-sensitive adhesive is coated on the foam layer, the pressure-sensitive adhesive fills the first groove and covers the first groove and the first protrusion, and the pressure-sensitive adhesive is cured to form the second groove and the second protrusion. By coating the pressure-sensitive adhesive on the foam layer, the pressure-sensitive adhesive can be filled into the first groove through its own fluidity, and in this process, due to its own fluidity, there will be no gaps in the first groove, the pressure-sensitive adhesive can fully fill the first groove, and then the pressure-sensitive adhesive will cover the first protrusion and the first groove, so that the pressure-sensitive adhesive will form the second groove and the second protrusion after curing, and the side of the pressure-sensitive adhesive away from the foam layer is a flat surface, thereby avoiding the unevenness of the two sides of the pressure-sensitive adhesive caused by the uneven surface of the foam layer, thereby avoiding the unevenness of the OLED display panel and causing damage.

[0061] Specifically, Figure 5 As shown, after the foam layer 32 is formed, a pressure-sensitive adhesive 33 is coated on the foam layer 32. Figure 5 As shown in (a) of FIG. 1 , it can be seen that the pressure-sensitive adhesive 33 is filled into the first groove on the surface of the foam layer 32 and covers the first groove and the first protrusion. Since the pressure-sensitive adhesive 33 can flow during this process, the pressure-sensitive adhesive 33 can fully fill the first groove and cover the first protrusion. Then, the pressure-sensitive adhesive 33 is cured so that the surface of the pressure-sensitive adhesive 33 away from the foam layer 32 is a plane, as shown in FIG. Figure 5 As shown in (b), the pressure-sensitive adhesive 33 and the foam layer 32 are then bonded together with the reinforcement layer 34 and the heat dissipation layer 35, and the reinforcement layer 34 and the heat dissipation layer 35 will not be uneven. When the composite film is bonded to the OLED display panel, the unevenness will not be transferred to the OLED display panel, causing problems with the appearance or display of the OLED display panel.

[0062] In one embodiment, if Figure 2 As shown, the OLED display module 2 further includes a reinforcing layer 34, which is disposed between the pressure-sensitive adhesive 33 and the heat dissipation layer 35, and the contact surface between the pressure-sensitive adhesive 33 and the reinforcing layer 34 is a plane. By making the contact surface between the pressure-sensitive adhesive and the reinforcing layer a plane, when the pressure-sensitive adhesive is disposed on the foam layer, even if the side of the pressure-sensitive adhesive away from the foam layer still has the problem of unevenness, the reinforcing layer can eliminate or alleviate the problem of uneven grooves on the foam layer, so that the problem of unevenness will not appear after the heat dissipation layer is attached, thereby avoiding the problem of unevenness of the composite film being transferred to the OLED display panel, resulting in poor appearance or display of the OLED display panel.

[0063] Specifically, by providing a reinforcing layer in the OLED display module, the reinforcing layer is made of polyimide, thereby increasing the strength of the composite film, improving the reliability of the composite film, and preventing the composite film from being damaged during use.

[0064] In one embodiment, if Figure 2 As shown, the OLED display module 2 further includes an adhesive layer 31, which is disposed between the OLED display panel 20 and the foam layer 32, and the contact surface between the adhesive layer 31 and the OLED display panel 20 is a plane. By making the contact surface between the adhesive layer and the OLED display panel a plane, when the surface of the foam layer close to the OLED display panel is uneven, the adhesive layer is used to fill the foam layer, so that the contact surface between the adhesive layer and the OLED display panel is a plane, thereby avoiding the unevenness of the OLED display panel, which leads to poor appearance and display.

[0065] In one embodiment, the material of the adhesive layer includes grid glue, and the grid glue is used for lamination and exhaust, and the grid glue is flexible to avoid affecting the flexibility of the OLED display module.

[0066] In one embodiment, the material of the foam layer includes foam, and the foam is used for cushioning and light shielding.

[0067] In one embodiment, the heat dissipation layer includes at least one of copper, aluminum, or an alloy.

[0068] In one embodiment, if Figure 2 As shown, the OLED display panel 20 includes a substrate 21, a driving circuit layer 22, a light-emitting functional layer 23 and an encapsulation layer 24, the driving circuit layer 22 includes an active layer 221, a first gate insulating layer 222, a first metal layer 223, a second gate insulating layer 224, a second metal layer 225, an interlayer insulating layer 226, a source and drain layer 227 and a planarization layer 228, and the light-emitting functional layer 23 includes a pixel electrode layer 231, a pixel definition layer 232, a light-emitting material layer 233 and a common electrode layer 234.

[0069] At the same time, an embodiment of the present application provides an OLED display device, which includes the OLED display module and the driving chip described in any one of the above embodiments.

[0070] Specifically, Figure 6 As shown, an embodiment of the present application provides an OLED display device, the OLED display device includes an OLED display module and a driving chip 41, the OLED display module includes:

[0071] OLED display panel 20;

[0072] A foam layer 32 is disposed on one side of the OLED display panel 20;

[0073] A pressure-sensitive adhesive 33 is disposed on a side of the foam layer 32 away from the OLED display panel 20;

[0074] The heat dissipation layer 35 is disposed on a side of the pressure-sensitive adhesive 33 away from the foam layer 32;

[0075] Among them, the foam layer 32 is provided with a first groove 321 and a first protrusion 322 on the side in contact with the pressure-sensitive adhesive 33, and the pressure-sensitive adhesive 33 is provided with a second groove 332 and a second protrusion 331 on the side in contact with the foam layer 32, the projection of the first groove 321 on the heat dissipation layer 35 coincides with the projection of the second protrusion 331 on the heat dissipation layer 35, the projection of the first protrusion 322 on the heat dissipation layer 35 coincides with the projection of the second groove 332 on the heat dissipation layer 35, the side of the pressure-sensitive adhesive 33 away from the foam layer 32 exceeds the first groove 321, and the flatness of the pressure-sensitive adhesive 33 on the side away from the foam layer 32 is greater than the flatness of the side of the pressure-sensitive adhesive 33 in contact with the foam layer 32.

[0076] An embodiment of the present application provides an OLED display device, which includes an OLED display module and a driving chip. The OLED display module is provided with a second groove and a second protrusion on a side of the pressure-sensitive adhesive close to the foam layer, and the projection of the first groove on the heat dissipation layer overlaps with the projection of the second protrusion on the heat dissipation layer, and the projection of the first protrusion on the heat dissipation layer overlaps with the projection of the second groove on the heat dissipation layer, and the side of the pressure-sensitive adhesive away from the foam layer exceeds the first groove, and the flatness of the side of the pressure-sensitive adhesive away from the foam layer is greater than the flatness of the side in contact with the foam layer. The second protrusion can fill the first groove, and the second groove can cooperate with the first protrusion, so as to flatten the protrusions and grooves of the foam layer, alleviate or even eliminate the unevenness on both sides of the pressure-sensitive adhesive caused by the uneven surface of the foam layer, thereby avoiding damage to the OLED display panel due to unevenness.

[0077] According to the above embodiments, it can be seen that:

[0078] The embodiments of the present application provide an OLED display module and an OLED display device; the OLED display module includes an OLED display panel, a foam layer, a pressure-sensitive adhesive and a heat dissipation layer, the foam layer is arranged on one side of the OLED display panel, the pressure-sensitive adhesive is arranged on the side of the foam layer away from the OLED display panel, the heat dissipation layer is arranged on the side of the foam layer away from the OLED display panel, and the heat dissipation layer is arranged on the side of the pressure-sensitive adhesive away from the foam layer, wherein the foam layer is provided with a first groove and a first protrusion on the side in contact with the pressure-sensitive adhesive, the pressure-sensitive adhesive is provided with a second groove and a second protrusion on the side in contact with the foam layer, the projection of the first groove on the heat dissipation layer overlaps with the projection of the second protrusion on the heat dissipation layer, the projection of the first protrusion on the heat dissipation layer overlaps with the projection of the second groove on the heat dissipation layer, the side of the pressure-sensitive adhesive away from the foam layer exceeds the first groove, and the flatness of the pressure-sensitive adhesive on the side away from the foam layer is greater than the flatness of the side of the pressure-sensitive adhesive in contact with the foam layer. In the present application, the pressure-sensitive adhesive is provided with a second groove and a second protrusion on the side close to the foam layer, and the projection of the first groove on the heat dissipation layer overlaps with the projection of the second protrusion on the heat dissipation layer, and the projection of the first protrusion on the heat dissipation layer overlaps with the projection of the second groove on the heat dissipation layer, and the side of the pressure-sensitive adhesive away from the foam layer exceeds the first groove, and the flatness of the side of the pressure-sensitive adhesive away from the foam layer is greater than the flatness of the side in contact with the foam layer. The second protrusion can fill the first groove, and the second groove can cooperate with the first protrusion, so as to level the protrusions and grooves of the foam layer, alleviate or even eliminate the unevenness on both sides of the pressure-sensitive adhesive caused by the uneven surface of the foam layer, thereby avoiding damage to the OLED display panel due to unevenness.

[0079] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0080] The above is a detailed introduction to an OLED display module and an OLED display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. An OLED display module, characterized in that: include: OLED display panel; A foam layer, disposed on one side of the OLED display panel; A pressure-sensitive adhesive is disposed on a side of the foam layer away from the OLED display panel; A heat dissipation layer, arranged on a side of the pressure-sensitive adhesive away from the foam layer; The foam layer is provided with a first groove and a first protrusion on the side in contact with the pressure-sensitive adhesive, the pressure-sensitive adhesive is provided with a second groove and a second protrusion on the side in contact with the foam layer, the projection of the first groove on the heat dissipation layer overlaps with the projection of the second protrusion on the heat dissipation layer, the projection of the first protrusion on the heat dissipation layer overlaps with the projection of the second groove on the heat dissipation layer, the side of the pressure-sensitive adhesive away from the foam layer exceeds the first groove, and the flatness of the side of the pressure-sensitive adhesive away from the foam layer is greater than the flatness of the side of the pressure-sensitive adhesive in contact with the foam layer; The OLED display module further includes an adhesive layer, which is disposed between the OLED display panel and the foam layer, and a contact surface between the adhesive layer and the OLED display panel is a plane.

2. The OLED display module according to claim 1, characterized in that: There is a gap between the surface of the pressure-sensitive adhesive close to the foam layer and the surface of the foam layer close to the pressure-sensitive adhesive.

3. The OLED display module according to claim 2, wherein: The first grooves and the first protrusions are arranged alternately, and the width of the first protrusions is smaller than the width of the first grooves.

4. The OLED display module according to claim 3, characterized in that: The second protrusions and the second grooves are arranged alternately, the width of the second protrusions is smaller than the width of the first grooves, the width of the second grooves is larger than the width of the first protrusions, the top of the second protrusions contacts the first grooves, and there is a gap between at least one side of the second protrusions and the side corresponding to the first groove.

5. The OLED display module according to claim 4, characterized in that: The thickness of the second protrusion is greater than the depth of the first groove, and the depth of the second groove is greater than the thickness of the first protrusion.

6. The OLED display module according to claim 4, characterized in that: At least one side surface of the second protrusion contacts a side surface corresponding to the second groove, and a vertex of the first protrusion and an edge of the second protrusion are located in the same vertical plane.

7. The OLED display module according to claim 3, characterized in that: The second protrusions and the second grooves are arranged alternately, the width of the second protrusions is greater than the width of the first grooves, the width of the second grooves is less than the width of the first protrusions, at least two side surfaces of the second protrusions are in contact with the side surfaces corresponding to the first grooves, and there is a gap between the vertex of the second protrusion and the first groove.

8. The OLED display module according to claim 2, wherein: The first grooves and the first protrusions are arranged alternately, and the width of the first protrusions is greater than or equal to the width of the first grooves.

9. The OLED display module according to claim 8, characterized in that: The second protrusions and the second grooves are arranged alternately, the width of the second protrusions is smaller than the width of the first grooves, the width of the second grooves is larger than the width of the first protrusions, the bottom surface of the second grooves contacts the top of the first protrusions, and there is a gap between at least one side surface of the second groove and the side surface corresponding to the first protrusion.

10. The OLED display module according to claim 1, wherein: The surface of the pressure-sensitive adhesive close to the foam layer is bonded to the surface of the foam layer close to the pressure-sensitive adhesive at any point.

11. The OLED display module according to claim 1, wherein: The OLED display module further includes a reinforcing layer, which is arranged between the pressure-sensitive adhesive and the heat dissipation layer, and the contact surface between the pressure-sensitive adhesive and the reinforcing layer is a plane.

12. An OLED display device, characterized in that: It comprises the OLED display module and the driving chip as described in any one of claims 1 to 11.

Images