Composite film layer, composite film layer laminating method and display panel

Abstract

The present invention provides a composite film layer, a method for laminating composite film layers, and a display device, wherein the composite film layer comprises: a protective layer, the protective layer comprising a first region and a second region, the second region at least partially surrounding the first region; a composite material layer, the composite material layer being laminated to one side of the protective layer, wherein the composite material layer comprises a third region and a fourth region, the third region corresponds to the first region, and the orthographic projection of the fourth region on the protective layer at least partially falls into the second region; a spacer, the spacer being located in the second region of the protective layer, and the spacer and the composite material layer being located on the same side of the protective layer. The composite film layer of the present application can avoid the problem of glue pulling during lamination to a display panel.

Description

Technical Field

[0001] The present invention relates to the field of display, and in particular to a composite film layer, a composite film layer lamination method and a display panel. Background Art

[0002] A layer of heat dissipation film (SCF) is generally attached to the bottom of the display panel. However, when the display panel is a curved display panel, various problems are prone to occur during the process of attaching the heat dissipation film. Summary of the invention

[0003] In order to solve the above technical problems, in a first aspect, the present application provides a composite film layer, comprising:

[0004] a protective layer, the protective layer comprising a first region and a second region, the second region at least partially surrounding the first region;

[0005] A composite material layer, wherein the composite material layer is attached to one side of the protective layer, wherein the composite material layer includes a third region and a fourth region, the third region corresponds to the first region, and an orthographic projection of the fourth region on the protective layer at least partially falls into the second region;

[0006] A spacer is located in the second area of ​​the protective layer, and the spacer and the composite material layer are located on the same side of the protective layer.

[0007] In one embodiment of the present application, a preset gap is provided between the spacer and the composite material layer.

[0008] In one embodiment of the present application, the gap is less than or equal to 0.1 mm.

[0009] In one embodiment of the present application, the spacer and the protective layer are made of the same material and are integrally formed.

[0010] In one embodiment of the present application, the thickness of the spacer is greater than or equal to the thickness of the composite material layer.

[0011] In one embodiment of the present application, the composite material layer includes at least a metal layer and a foam layer.

[0012] In a second aspect, the present application provides a method for laminating a composite film layer, wherein the composite film layer is used to laminat a curved display panel, wherein the curved display panel includes a planar area and a curved area connected to each other;

[0013] The composite film layer also includes a protective layer, a composite material layer and a spacer;

[0014] Wherein, the protective layer comprises a first region and a second region, and the second region at least partially surrounds the first region;

[0015] The composite material layer is attached to one side of the protective layer, wherein the composite material layer includes a third region and a fourth region, the third region corresponds to the first region, and the orthographic projection of the fourth region on the protective layer at least partially falls into the first region;

[0016] The spacer is located in the second region of the protective layer, and the spacer and the composite material layer are located on the same side of the protective layer;

[0017] The bonding method comprises:

[0018] Providing the curved display panel;

[0019] The composite film layer is attached to the curved display panel, wherein the spacer is in contact with the curved area of ​​the curved display panel, and the composite material layer overlaps / contacts with the curved area and the flat area of ​​the curved display panel.

[0020] In one embodiment of the present application, laminating the composite film layer to the curved display panel includes:

[0021] The spacer is first brought into contact with the curved area of ​​the curved display panel, and then the composite material layer is attached to the display panel.

[0022] In one embodiment of the present application, the curved surface area includes a first curved surface area and a second curved surface area, and the first curved surface area and the second curved surface area are respectively located on both sides of the planar area;

[0023] The second area includes a first sub-area and a second sub-area, the fourth area includes a third sub-area and a fourth sub-area, the orthographic projection of the third sub-area on the protective layer at least partially falls into the first sub-area, and the orthographic projection of the fourth sub-area on the protective layer at least partially falls into the second sub-area;

[0024] The spacer member further comprises a first sub-spacer member and a second sub-spacer member; the first sub-spacer member is located in a first sub-region of the protective layer, and the second sub-spacer member is located in a second sub-region of the protective layer.

[0025] In a third aspect, the present application provides a display panel, comprising the composite film layer shown in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figures 1A-1C A schematic diagram of a process of laminating a composite film layer and a curved display panel provided for related technologies;

[0027] Figure 2A schematic diagram of the structure of a composite membrane layer provided in one embodiment of the present application;

[0028] Figure 3 A schematic diagram of the structure of a composite membrane layer provided in another embodiment of the present application;

[0029] Figure 4 A schematic diagram of the structure of a composite membrane layer provided in another embodiment of the present application;

[0030] Figure 5 A schematic diagram of the structure of a composite membrane layer provided in another embodiment of the present application;

[0031] Figures 6A-6D A schematic diagram of a bonding process of a composite film layer and a display panel provided in one embodiment of the present application;

[0032] Figure 7 FIG6 is a schematic diagram showing the completion of the bonding of the composite film layer and the display panel.

[0033] Figure 8 A schematic diagram of a bonding process of a composite film layer and a display panel provided in one embodiment of the present application;

[0034] Fig. 9 A schematic diagram showing the completion of lamination of the composite film layer 8 and the display panel;

[0035] Fig.10 A schematic diagram of a display device 200 provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] It should be noted that specific details are described in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in a variety of other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

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

[0039] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present invention are described at the angles shown in the drawings and should not be understood as limiting the embodiments of the present invention. In addition, in the context, it should also be understood that when it is mentioned that an element is formed "on" or "under" another element, it can not only be formed directly "on" or "under" another element, but also be formed "on" or "under" another element indirectly through an intermediate element.

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention will be further described in conjunction with the accompanying drawings and embodiments. However, the exemplary embodiments can be implemented in various forms and should not be construed as being limited to the embodiments described herein; on the contrary, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated descriptions will be omitted. The words expressing the position and direction described in the present invention are all described with reference to the accompanying drawings as examples, but they can also be changed as needed, and the changes made are all included in the scope of protection of the present invention. The accompanying drawings of the present invention are only used to illustrate the relative position relationship, and the layer thickness of certain parts is exaggerated for easy understanding. The layer thickness in the accompanying drawings does not represent the proportional relationship of the actual layer thickness. And in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The drawings of the embodiments in this application follow the same markings of the drawings. For the convenience of explanation, some structures in the drawings are illustrated in a perspective manner. In addition, the similarities between the embodiments are not repeated.

[0041] Figures 1A-1C A schematic diagram of a composite film layer and a curved display panel bonding process provided for related technology.

[0042] See also Figure 1A The display panel 150' is a curved display panel. The display panel 150' includes a cover plate 130', an adhesive layer 132' and a panel layer (penel) 134', and the panel layer (penel) 134' includes a plurality of light emitting units.

[0043] Further, Figure 1A The composite film layer 100' to be bonded is also shown. Specifically, the composite film layer 100' includes a protective layer 102' and a composite material layer 108' bonded to the protective layer 102'. In the prior art, the composite film layer 100' is generally pressed by a contouring jig 136' to bond the composite film layer 100' to the curved display panel 150'.

[0044] Specifically, the lamination process of the composite film layer 100' may include the following steps:

[0045] First, see Figure 1A , providing a curved display panel 150 ′ and a composite film layer 100 ′ to be bonded.

[0046] Secondly, see Figure 1B The composite film layer is pressed onto the middle flat area of ​​the curved display panel using a contoured jig 136'.

[0047] Finally, see Figure 1C , the profiling jig 136' is moved from the flat area of ​​the curved display panel 150' to the curved areas on both sides in turn, so as to adhere the composite film layer 100' to the curved areas on both sides of the curved display panel 150' (Figure 1C only shows that the composite film layer 100' is adhered to one curved area).

[0048] However, the applicant has found that in the process of laminating the composite film layer 100 ′ to the curved display panel, the composite material layer 108 ′ is prone to have a false lamination phenomenon in the curved surface area of ​​the curved display panel.

[0049] After a lot of experiments and investment, the inventors found that the problem of false adhesion is caused by the glue pulling during the bonding process of the composite film layer 100' and the curved display panel 150'. Figure 1B In the dotted circle area, during the process of attaching the composite film layer 100' to the curved display panel 150', the composite film layer 100' will come into contact with the curved display panel 150' in advance in the dotted circle area. Since the composite material layer in the composite film layer 100' has a certain viscosity on the side close to the display panel 150', glue pulling will occur during the contact between the two. The area where the composite film layer 100' is glued will become uneven and the viscosity will be weakened. When the composite film layer 100' is attached to the curved surface area of ​​the display panel 150', it is easy for the composite film layer to be glued in the area where the glue is pulled.

[0050] In addition, during the specific bonding process between the composite film layer 100' and the curved display panel 150', since the contouring jig 136' is pressed from the flat area to the curved area of ​​the display panel 150, part of the adhesive in the composite film layer will flow from the flat area to the curved area under the action of the pressing force of the contouring jig 136', thereby causing adhesive overflow, which will further affect the bonding effect of the composite film layer.

[0051] In order to solve the above technical problems, the present application proposes a new composite film layer and a bonding method thereof.

[0052] Figure 2 Specifically, it is a schematic diagram of the structure of a composite film layer 100 provided in one embodiment of the present application. Figure 2The composite film layer 100 includes a protective layer 102, which is used to protect the composite material layer in the composite film layer during transportation and to support the composite material layer when the composite material layer is attached to the display panel.

[0053] The protective layer 102 includes a first region 104 and a second region 106, wherein the second region 106 at least partially surrounds the first region 104. Generally, the first region 104 is used to adhere to a flat area of ​​a curved display panel, and the second region 106 is used to adhere to a curved area of ​​a curved display panel.

[0054] The composite film layer 100 further includes a composite material layer 108, which is attached to one side of the protective layer 102, and the composite material layer includes a third region 110 and a fourth region 112, and the third region 110 corresponds to the first region 104. Further, in a direction perpendicular to the plane where the composite film layer is located, the orthographic projection of the fourth region 112 on the protective layer at least partially falls into the second region 106.

[0055] It can be understood that since the second area 106 is used to adhere to the curved area of ​​the curved display panel, the orthographic projection of the fourth area 112 on the protective layer at least partially falls into the second area 106, indicating that at least part of the composite material layer is adhered to the curved area of ​​the curved display panel.

[0056] Continue to see Figure 2 The composite film layer 100 further includes a spacer 114 , which is located in the second region 106 of the protective layer 102 , and the spacer 114 and the composite material layer 108 are located on the same side of the protective layer.

[0057] The present application arranges the spacer 114 in the second area 106 of the protective layer 102, and the spacer 114 and the composite material layer 108 are located on the same side of the protective layer. During the transportation of the composite film layer, the spacer 114 can prevent the composite material layer 108 from being displaced due to vibration and causing scratches on the side.

[0058] Furthermore, the material of the spacer 114 is different from that of the composite material layer 108, and the spacer 114 is not sticky, or the stickiness of the spacer 114 is less than that of the composite material layer 108. Thus, during the bonding process of the composite film layers, since the spacer 114 is located in the second area 106 of the protective layer 102, the spacer 114 contacts the curved surface area of ​​the display panel earlier than the composite material layer, thereby preventing the composite material layer 108 from contacting the curved surface area of ​​the curved display panel in advance, thereby preventing the composite material layer from having glue pulling problems, and further avoiding the problem of false bonding of the composite material layer.

[0059] Continue to see Figure 2, there can be a preset gap 115 between the composite material layer 108 and the spacer 114, by setting the gap 115. It has been shown above that some of the adhesive materials in the composite film layer may overflow, and setting the gap 115 can make the adhesive material have a certain overflow range. At the same time, the spacer 114 has a certain blocking effect, avoiding excessive overflow of the adhesive material during the bonding process, thereby improving the final bonding effect of the composite film layer. In addition, the gap 115 can also prevent the spacer from excessively contacting the composite material layer during transportation. In a specific example of the present application, the gap is less than or equal to 0.1 mm.

[0060] See also Figure 3 , Figure 3 A schematic structural diagram of a display panel provided in another embodiment of the present application. Figure 3 In the example shown, the protective layer 102 can be made of the same material as the spacer 114 and formed integrally. For example, the protective layer and the spacer can both be made of polymethyl methacrylate. By making the protective layer 102 and the spacer 114 made of the same material and formed integrally, the manufacturing process can be simplified and the process efficiency can be improved.

[0061] See also Figure 4 , Figure 4 A schematic structural diagram of a display panel provided in another embodiment of the present application. Figure 4 In the example shown, the composite material layer may include multiple material layers. For example, the composite material layer may include at least a metal layer 1082 and a foam layer 1084 .

[0062] Further, see Figure 4 , in the direction perpendicular to the plane where the composite film layer 100 is located, the thickness (height) of the spacer 114 can be greater than the thickness (height) of the composite material layer 108. In this way, during the transportation of the composite film layer 100, the spacer 114 can better protect the composite material layer 108. In addition, the thickness (height) of the spacer 114 can be greater than the thickness (height) of the composite material layer 108, which can increase the contact area between the spacer 114 and the display panel during the lamination of the composite film layer, and better avoid the composite material layer 108 from contacting the curved surface area of ​​the display panel in advance, causing glue pulling.

[0063] See also Figure 5 , Figure 5 A schematic structural diagram of a display panel provided in another embodiment of the present application. Figure 5In the example shown, compared to the above example, the second region 106 includes a first sub-region 1062 and a second sub-region 1064, the fourth region includes a third sub-region 1122 and a fourth sub-region 1124, the orthographic projection of the third sub-region 1122 on the protective layer at least partially falls into the first sub-region 1062, and the orthographic projection of the fourth sub-region 1124 on the protective layer 102 at least partially falls into the second sub-region 1064.

[0064] Furthermore, the spacer 114 further includes a first sub-spacer 1142 and a second sub-spacer 1144 ; the first sub-spacer 1142 is located in the first sub-region 1062 of the protective layer 102 , and the second sub-spacer 1144 is located in the second sub-region 1064 of the protective layer 102 .

[0065] It can be understood that a curved display generally includes at least two curved areas. Figure 5 The composite film layer shown can better match the curved display panel. In addition, the spacers 114 are arranged on both sides of the composite material layer 108, which can better protect the composite material layer during the transportation of the composite film layer.

[0066] See the attached Figures 6A-6D and attached Figure 7 The lamination process of the composite film layer provided in the above embodiment is explained and described. Figures 6A-6D A schematic diagram of a bonding process between a composite film layer and a display panel provided in accordance with an embodiment of the present application. Figure 7 for Figures 6A-6D Schematic diagram of the completion of the bonding of the composite film layer and the display panel.

[0067] Exemplarily, the lamination process of the composite film layer is as follows:

[0068] First, see Fig. 6A , providing a composite film layer 100 and a curved display panel 150 , wherein the composite film layer 100 is attached to a guide film 142 , and both sides of the guide film 142 are clamped by a clamp 140 .

[0069] like Fig. 6A As shown, the display panel 150 is specifically a curved display panel. The display panel 150 includes a cover plate 130, an adhesive layer 132 and a panel layer (penel) 134, and the panel layer (penel) 134 includes a plurality of light-emitting units. Exemplarily, the adhesive layer 132 may include an optical adhesive (OCA). It should be noted that the curved display panel in the present application may also include other film layers, such as a polarizing layer POL, etc., which is not limited in the present application.

[0070] The structure of the composite film layer 100 can be referred to Figure 2-Figure 5 The structure shown will not be described in detail.

[0071] The third region 110 of the composite material layer 108 is used to be attached to the flat region 120 of the display panel, and the fourth region 112 of the composite material layer 108 is used to be attached to the curved region 118 of the display panel. That is, after the composite material layer 108 is attached to the curved display panel, the third region 110 of the composite material layer 108 corresponds to the flat region 120 of the display panel, and the fourth region 112 of the composite material layer 108 corresponds to the curved region 118 of the display panel. Further, the first region 104 of the protective layer 102 also corresponds to the flat region 120, and the second region 106 of the protective layer 102 may correspond to the curved region 118.

[0072] Secondly, see Figure 6B The composite film layer 100 is pressed onto the curved display panel 150 using a contoured jig 136 .

[0073] Exemplarily, the profiling jig 136 first presses the composite film layer 100 against the flat area 120 of the display panel. During the pressing process, the spacer 114 on the composite film layer contacts the curved surface area of ​​the display panel earlier than the composite material layer. Specifically, when the composite film layer 100 is subjected to the force given by the profiling jig 136, the portion of the composite film layer 100 that is in direct contact with the profiling jig 136 is deformed first, and approaches the flat surface area as the pressing force is applied. At the same time, the edge area of ​​the composite film layer will also be deformed based on the pressure conducted by the guide film 142. Obviously, since the spacer 114 is arranged in the second area 106 of the protective film, that is, the edge area of ​​the composite film layer 100, the spacer 114 will contact the curved surface area of ​​the display panel earlier. In this way, it is avoided that the composite material layer touches the curved surface area in advance, causing problems such as glue pulling.

[0074] Further, see Figure 6C , the composite film layer 100 is pressed using a contoured jig 136 from the flat area 120 to the curved area 118 .

[0075] Further, see Fig.6D , from the curved area 118 to the flat area 120 , the composite film layer 100 is pressed using a contouring jig 136 to ensure that the composite film layer 100 corresponding to the flat area 120 is better fitted.

[0076] like Figure 7 As shown, when the composite film layer 100 is bonded, the spacer 114 is located in the curved area 118 of the curved display panel. Specifically, the spacer 114 can contact the curved area of ​​the curved display panel, and the composite material layer 108 overlaps / contacts the curved area and the flat area of ​​the curved display panel.

[0077] Furthermore, in an example of the present application, the area of ​​the composite material layer is smaller than the area of ​​the display panel, so that the protective layer has enough space to set the spacer and prevent the composite material layer from being too large and prematurely contacting the curved surface of the display panel.

[0078] See the attached Figure 8 and attached Fig. 9 The lamination process of the composite film layer provided in the above embodiment is explained and described. Figure 8 A schematic diagram of a bonding process between a composite film layer and a display panel provided in another embodiment of the present application. Fig. 9 for Figure 8 A schematic diagram showing the completion of the bonding of the composite film layer and the display panel is provided.

[0079] Figure 8 and Fig. 9 The bonding method can refer to the method shown in FIG6 , and the details are not described again. Figure 7 The display panel shown is different in that Figure 8 and Fig. 9 The curved surface area of ​​the display panel 150 includes a first curved surface area 1182 and a second curved surface area 1184, that is, includes two curved surface areas. Figure 8 and Fig. 9 , the first curved area 1182 and the second curved area 1184 in the display panel are respectively located on both sides of the flat area 120.

[0080] During the lamination of the composite film layer, the first sub-region 1062 on the protective layer 102 corresponds to the first curved surface area 1182, and the second sub-region 1064 on the protective layer 102 corresponds to the second curved surface area 1184. At the same time, the third region 110 of the composite material layer corresponds to the display panel plane area 120. The orthographic projection of the third sub-region 1122 of the composite material layer on the protective layer 102 at least partially falls into the first sub-region 1062, and the orthographic projection of the fourth sub-region 1124 of the composite material layer on the protective layer 102 at least partially falls into the second sub-region 1064.

[0081] Further, after the composite film layer is attached to the display panel, the first sub-spacer 1142 is located in the first curved surface area 1182, and the second sub-spacer 1144 is located in the second curved surface area 1184. Specifically, the first sub-spacer 1142 may contact the first curved surface area 1182 of the curved display panel, and the second sub-spacer 1144 may contact the second curved surface area 1184 of the curved display panel.

[0082] The curved display panel can be better matched by providing the first sub-spacer and the second sub-spacer.

[0083] See also Fig.10 , Fig.10 A schematic diagram of a display device 200 provided in one embodiment of the present application. The display device 200 is a display panel formed by laminating the composite film layers according to the laminating method shown above.

[0084] It should be noted that the display panel (intermediate state) shipped from the display panel manufacturer will have a protective layer left on it to protect the display screen. When it is transported to the terminal factory for assembly into a display device, the protective layer will be torn off.

[0085] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A composite film layer, characterized in that: include: a protective layer, the protective layer comprising a first region and a second region, the second region at least partially surrounding the first region; A composite material layer, wherein the composite material layer is attached to one side of the protective layer, and the side of the composite material layer facing away from the protective layer is sticky; wherein the composite material layer comprises a third region and a fourth region, the third region corresponds to the first region, and the orthographic projection of the fourth region on the protective layer at least partially falls into the second region; A spacer, wherein the spacer is located in the second region of the protective layer, and the spacer and the composite material layer are located on the same side of the protective layer; The material of the spacer is different from that of the composite material layer, and the spacer has no viscosity, or the viscosity of the spacer is lower than that of the composite material layer.

2. The composite film layer according to claim 1, characterized in that: A preset gap is provided between the spacer and the composite material layer.

3. The composite film layer according to claim 2, characterized in that: The gap is less than or equal to 0.1 mm.

4. The composite film layer according to claim 1, characterized in that: The spacer and the protective layer are made of the same material and are integrally formed.

5. The composite film layer according to claim 1, characterized in that: The thickness of the spacer is greater than or equal to the thickness of the composite material layer.

6. The composite film layer according to claim 1, characterized in that: The composite material layer at least includes a metal layer and a foam layer.

7. A method for laminating a composite film layer, wherein the composite film layer is used for laminating a curved display panel, wherein the curved display panel comprises a planar area and a curved area connected to each other; The composite film layer comprises a protective layer, a composite material layer and a spacer; in, The protective layer includes a first region and a second region, wherein the second region at least partially surrounds the first region; The composite material layer is attached to one side of the protective layer, wherein the composite material layer includes a third region and a fourth region, the third region corresponds to the first region, and the orthographic projection of the fourth region on the protective layer at least partially falls into the second region; The spacer is located in the second region of the protective layer, and the spacer and the composite material layer are located on the same side of the protective layer; The bonding method comprises: Providing the curved display panel; Laminating the composite film layer to the curved display panel, wherein the spacer is in contact with the curved area of ​​the curved display panel, and the composite material layer overlaps / contacts with the curved area and the flat area of ​​the curved display panel; The step of laminating the composite film layer to the curved display panel comprises: The spacer is first brought into contact with the curved area of ​​the curved display panel, and then the composite material layer is attached to the display panel.

8. The laminating method according to claim 7, characterized in that: The area of ​​the composite material layer is smaller than the area of ​​the display panel.

9. The laminating method according to claim 7, characterized in that: The curved surface area includes a first curved surface area and a second curved surface area, wherein the first curved surface area and the second curved surface area are respectively located on two sides of the planar area; The second area includes a first sub-area and a second sub-area, the fourth area includes a third sub-area and a fourth sub-area, the orthographic projection of the third sub-area on the protective layer at least partially falls into the first sub-area, and the orthographic projection of the fourth sub-area on the protective layer at least partially falls into the second sub-area; The spacer member further comprises a first sub-spacer member and a second sub-spacer member; the first sub-spacer member is located in a first sub-region of the protective layer, and the second sub-spacer member is located in a second sub-region of the protective layer.

10. A display panel, characterized in that: The composite film layer comprises the composite film layer as claimed in any one of claims 1 to 6.

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