Flexible display module, display device, and electronic device

Abstract

The present invention discloses a flexible display module, a display device and an electronic device. The flexible display module includes: a display part, the display part has opposite front and back surfaces, a first protective film layer is provided on the back surface, and a composite film layer is provided on the first protective film layer; a Pad part, the Pad part is located on one side of the display part, the Pad part is connected to the display part, and the Pad part can be bent to the back side of the display part; a rigid support part, the rigid support part is provided on the Pad part and is adhesively connected to the composite film layer. In the flexible display module according to the embodiment of the present invention, by providing the rigid support part, the support and protection performance of COP Bonding can be improved, the Crack risk can be reduced, the module yield can be improved, and no fault will occur when the composite film layer is attached, which can solve the problem of long strip printing marks existing when the composite film layer is attached in the related art.

Description

Technical Field

[0001] The present invention relates to the technical field of AMOLED display, and in particular to a flexible display module, a display device, and an electronic device. Background Art

[0002] In the current flexible module structure, the Pad part (Pad Bending) is fixed to the back of the flexible module after being folded back through a double-sided tape (the structure is PSA+PET+PSA). Since the narrow border Bending R is getting smaller and smaller, the thickness of the double-sided tape is also getting thinner and thinner (30-100um). In this form, the double-sided tape needs to be supplied in one piece with the back cache composite tape of the flexible module (hereinafter referred to as SCF) (there are problems with the adsorption of the split supply equipment). In this one-piece supply method, during the process of attaching the SCF roller, due to the height difference between the back cache composite tape of the flexible module and the Bending Spacer (the tape for fixing the Pad Bending part after folding), different deformations will occur due to uneven stress on the film layer at this position, which will cause subsequent stamping problems.

[0003] In addition, in the existing structure, the back of the Pad area of the flexible display screen is only supported and protected by a back film, and the back film is made of plastic film materials such as PET or PI. After the IC is bonded to the flexible display screen, the support and protection are insufficient, resulting in a high incidence of COP Crack defects in the production line. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the present invention is to provide a flexible display module, and the flexible display module can solve the problems of stamping and COP Crack defects.

[0005] The present invention also aims to provide a display device to apply the above flexible display module.

[0006] The present invention also aims to provide an electronic device to apply the above display device.

[0007] The flexible display module according to an embodiment of the present invention includes: a display part, the display part has opposite front and back surfaces, a first protective film layer is provided on the back surface, and a composite film layer is provided on the first protective film layer; a Pad part, the Pad part is located on one side of the display part, the Pad part is connected to the display part, and the Pad part can be bent to the back side of the display part; a rigid support part, the rigid support part is provided on the Pad part and is adhesively connected to the composite film layer.

[0008] The flexible display module according to the embodiment of the present invention can improve the support and protection performance of COP Bonding, reduce the risk of Crack, improve the module yield rate by setting the rigid support part, and prevent the composite film layer from generating faults during attachment, thereby solving the problem of long strip printing during the attachment of the composite film layer in the related art.

[0009] In some embodiments, the rigid support part includes a support layer and adhesive layers provided on opposite sides of the support layer, and the adhesive layers on the opposite sides respectively bond the composite film layer and the Pad part.

[0010] In some embodiments, the support layer is a metal foil, and the material of the metal foil includes one or more of stainless steel, copper, and aluminum.

[0011] In some embodiments, the thickness of the support layer is greater than the thickness of the adhesive layer.

[0012] In some embodiments, the Pad part includes a Pad body and a second protective film layer provided on the side of the Pad body close to the back surface, and the rigid support part is provided on the second protective film layer.

[0013] In some embodiments, the thickness of the first protective film layer is greater than the thickness of the second protective film layer, and the thickness of the second protective film layer is less than the thickness of the rigid support part.

[0014] In some embodiments, the first protective film layer has a first side close to the bent portion of the Pad part, the second protective film layer has a second side close to the bent portion of the Pad part, and the rigid support part has a third side close to the bent portion of the Pad part, and the third side, the second side, and the first side are located on the same plane.

[0015] In some embodiments, the second protective film layer has a fourth side away from the bent portion of the Pad part, the rigid support part has a fifth side away from the bent portion of the Pad part, and the fifth side and the fourth side are located on another plane.

[0016] The display device according to the embodiment of the present invention includes the flexible display module described above.

[0017] The electronic device according to the embodiment of the present invention includes the display device described above.

[0018] The additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 It is a schematic diagram of the Pad part of the flexible display module in a bent state in an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the Pad part of the flexible display module in an unbent state in an embodiment of the present invention.

[0022] Reference numerals:

[0023] 10. Flexible display module; 101. Display part; 101a. Front side; 101b. Back side; 102. Pad part; 1021. Pad body; 1022. Second protective film layer; 103. Rigid support part; 1031. Support layer; 1032. Adhesive layer; 103a. Third side; 103b. Fifth side; 104. First protective film layer; 104a. First side; 1022a. Second side; 1022b. Fourth side; 105. Composite film layer; 20. Roller. Detailed description of the specific embodiments

[0024] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0025] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0026] In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features, used to distinguish and describe features, without order or importance.

[0027] In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0028] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The flexible display module 10 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0030] As Figure 1 shown, the flexible display module 10 according to an embodiment of the present invention includes a display portion 101, a Pad portion 102, and a rigid support portion 103.

[0031] The display portion 101 has opposite front and back surfaces 101a and 101b. A first protective film layer 104 is provided on the back surface 101b, and a composite film layer 105 is provided on the first protective film layer 104. The Pad portion 102 is located on one side of the display portion 101. The Pad portion 102 is connected to the display portion 101, and the Pad portion 102 can be bent to the back surface 101b side of the display portion 101. The rigid support portion 103 is provided on the Pad portion 102, and the rigid support portion 103 and the composite film layer 105 are adhesively connected.

[0032] The rigid support portion 103 can serve both as a Bending Spacer and a rigid support. When the Pad portion 102 is bent to the back surface 101b side of the display portion 101 and fixed to the composite film layer 105 (SCF) through the rigid support portion 103, due to the rigid support function of the rigid support portion 103, most of the forces on the Pad portion 102 can act on the rigid support portion 103, and the forces transmitted to the first protective film layer 104 and the display portion 101 are greatly reduced. This can improve the support and protection performance of the flexible display module 10 in COP Bonding, reduce the risk of cracking, and improve the module yield.

[0033] On the other hand, in the manufacturing process of the flexible display module 10, it is necessary to roll the composite film layer 105 through a roller 20 to make the composite film layer 105 adhere to the display portion 101. Since the rigid support portion 103 is provided on the Pad portion 102 and adhesively connected to the composite film layer 105 after the Pad portion 102 is bent, rather than directly provided on the composite film layer 105, there is no height difference on the composite film layer 105. During the rolling process of the roller 20, the composite film layer 105 is uniformly stressed, and no different deformations will occur due to uneven stress on the film layer, thereby reducing or avoiding the occurrence of die stamping.

[0034] According to the flexible display module 10 of the embodiment of the present invention, by providing the rigid support portion 103, the support and protection performance of the COP Bonding can be improved, the Crack risk can be reduced, the module yield can be increased, and no fault will occur during the attachment of the composite film layer 105, which can solve the problem of long strip printing during the attachment of the composite film layer in the related art.

[0035] In some embodiments, such as Figure 1 , Figure 2 shown, the rigid support portion 103 includes a support layer 1031 and adhesive layers 1032 provided on opposite sides of the support layer 1031. The adhesive layers 1032 on the opposite sides are respectively bonded to the composite film layer 105 and the Pad portion 102. "Opposite sides of the support layer 1031" may refer to Figure 1 the upper and lower sides. The support layer 1031 plays a rigid support role, and the adhesive layer 1032 can play an adhesive role to fix the rigid support portion 103 on the composite film layer 105 and the Pad portion 102. Among them, the adhesive layer 1032 can be formed by coating glue on the side surface of the support layer 1031.

[0036] In some embodiments, the support layer 1031 is a metal foil.

[0037] In some embodiments, the material of the metal foil includes one or more of stainless steel, copper, and aluminum. That is to say, the metal foil can be made of high-strength materials. For example, the material of the metal foil can be stainless steel (SUS), or copper (CU), or aluminum (AL), or a mixed material of stainless steel, copper, and aluminum.

[0038] In some embodiments, such as Figure 1 , Figure 2 shown, the thickness of the support layer 1031 is greater than the thickness of the adhesive layer 1032. "Thickness" may refer to Figure 1 the dimension in the up and down direction. That is to say, the thickness of the support layer 1031 is relatively large, so that the rigid support portion 103 has relatively good support performance.

[0039] In some embodiments, such as Figure 1 , Figure 2 shown, the Pad portion 102 includes a Pad body 1021 and a second protective film layer 1022 on the side of the Pad body 1021 close to the back surface. The rigid support portion 103 is provided on the second protective film layer 1022. That is to say, a second protective film layer 1022 is provided on the Pad body 1021, one side of the rigid support portion 103 is bonded to the second protective film layer 1022, and the other side is bonded to the composite film layer 105. In addition, in another case, the Pad portion 102 includes a Pad body 1021, the rigid support portion 103 is directly bonded to the Pad portion 102, and then bonded to the composite film layer 105.

[0040] In some embodiments, such as Figure 1 shown, the thickness of the first protective film layer 104 is greater than that of the second protective film layer 1022, and the thickness of the second protective film layer 1022 is less than that of the rigid support portion 103. Since the Pad portion 102 is bent and connected to the composite film layer 105, the radius of the rounded corner at the bent portion of the Pad portion 102 remains relatively fixed. In this way, the total thickness of the first protective film layer 104, the composite film layer 105, the rigid support portion 103, and the second protective film layer 1022 ( Figure 1 the dimension in the up-down direction in Figure 1 ) is relatively fixed. The first protective film layer 104 serves to protect the display portion 101 and should have as large a thickness as possible. Therefore, by adjusting the thickness of the second protective film layer 1022 and appropriately increasing the thickness of the rigid support portion 103, better support performance can be achieved, and the risk of Crack and the probability of long strip stamping can be further reduced.

[0041] In some embodiments, such as Figure 1 shown, the first protective film layer 104 has a first side surface 104a close to the bent portion of the Pad portion 102, the second protective film layer 1022 has a second side surface 1022a close to the bent portion of the Pad portion 102, and the rigid support portion 103 has a third side surface 103a close to the bent portion of the Pad portion 102. The third side surface 103a, the second side surface 1022a, and the first side surface 104a are located on the same plane. That is to say, one end of the first protective film layer 104, the second protective film layer 1022, and the rigid support portion 103 are kept flush to achieve better support performance.

[0042] In some embodiments, such as Figure 1 shown, the second protective film layer 1022 has a fourth side surface 1022b away from the bent portion of the Pad portion 102, and the rigid support portion 103 has a fifth side surface 103b away from the bent portion of the Pad portion 102. The fifth side surface 103b and the fourth side surface 1022b are located on another plane. Combining the foregoing, that is to say, both ends of the rigid support portion 103 can be kept flush with both ends of the first protective film layer 104 and the second protective film layer 1022, which can increase the support surface area of the rigid support portion 103 and the first protective film layer 104 and the second protective film layer 1022 and improve the support and protection performance.

[0043] The display device according to the embodiment of the present invention includes the foregoing flexible display module 10.

[0044] The display device may refer to a device including the flexible display module 10. For example, the flexible display module 10 can be understood as a flexible screen component, such as an AMOLED screen, and the display device can be understood as a display component such as a display. The electronic device according to the embodiment of the present invention includes the foregoing display device.

[0045] An electronic device may refer to a device with a display function. For example, the electronic device may be a product or component such as a mobile phone, a tablet computer, a television, a laptop computer, a digital photo frame, and a navigator, etc.

[0046] In the description of this specification, the description with reference to terms such as "some embodiments", "optionally", "further", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0047] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A flexible display module, characterized in that, comprising: a display part, the display part having opposite front and back surfaces, a first protective film layer provided on the back surface, and a composite film layer provided on the first protective film layer; a Pad part, the Pad part being located on one side of the display part, the Pad part being connected to the display part, and the Pad part being capable of being bent to the back surface side of the display part; a rigid support part, the rigid support part being provided on the Pad part and adhesively connected to the composite film layer; the rigid support part includes a support layer and adhesive layers provided on opposite sides of the support layer, and the adhesive layers on the opposite sides respectively adhere to the composite film layer and the Pad part; the Pad part includes a Pad body and a second protective film layer provided on the side of the Pad body close to the back surface, and the rigid support part is provided on the second protective film layer; the thickness of the second protective film layer is less than the thickness of the first protective film layer, and the thickness of the second protective film layer is less than the thickness of the rigid support part.

2. The flexible display module according to claim 1, characterized in that, the support layer is a metal foil, and the material of the metal foil includes one or more of stainless steel, copper, and aluminum.

3. The flexible display module according to claim 1, characterized in that, the thickness of the support layer is greater than the thickness of the adhesive layer.

4. The flexible display module according to claim 1, characterized in that, the first protective film layer has a first side surface close to the bent portion of the Pad part, the second protective film layer has a second side surface close to the bent portion of the Pad part, the rigid support part has a third side surface close to the bent portion of the Pad part, and the third side surface, the second side surface, and the first side surface are in the same plane.

5. The flexible display module according to claim 4, characterized in that, the second protective film layer has a fourth side surface away from the bent portion of the Pad part, the rigid support part has a fifth side surface away from the bent portion of the Pad part, and the fifth side surface and the fourth side surface are in another plane.

6. A display device, characterized in that, comprising the flexible display module according to any one of claims 1 to 5.

7. An electronic device, characterized in that, comprising the display device according to claim 6.

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