Display assembly and assembly method thereof, and display device

Abstract

The present invention discloses a display assembly and an assembly method thereof, and a display device, which relates to the field of display technology and is invented to solve the problem that a flexible display panel is easily peeled off from other film layers after being bent. The display assembly includes: a flexible display panel, a circuit board, a diaphragm assembly, a cover plate, a first support layer and a second support layer. The flexible display panel includes a panel body and a bending portion, and the first end of the bending portion along its extension direction is connected to a side edge of the panel body; the circuit board is arranged on the back side of the panel body and connected to the second end of the bending portion; the diaphragm assembly is stacked on the display side of the panel body, and the cover plate is stacked on the side of the diaphragm assembly away from the panel body; the first support layer is stacked on the back side of the panel body and is located between the panel body and the bending portion; the second support layer is arranged at the first end of the bending portion and is located between the cover plate and the bending portion. The present invention can be used in display devices such as mobile phones.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display component and an assembling method thereof, and a display device. Background Art

[0002] With the development of display technology, the industry has increasingly higher requirements on the size of the bottom frame of display devices such as mobile phones. A smaller bottom frame size can enable the display device to have a larger screen-to-body ratio, and users can get a better visual experience.

[0003] In order to obtain a smaller bottom frame, COP (chip on plastic) packaging technology came into being. This technology is to make the driver chip (Driver IC) on the substrate of the flexible display panel, and then bend the part of the flexible display panel where the driver chip is set, and bind it to the circuit board on the back. This technology does not need to reserve binding space with the circuit board at the position of the bottom frame of the flexible display panel, so the bottom frame of the flexible display panel can be made very narrow.

[0004] However, after bending, the bending area of ​​the flexible display panel is prone to peeling off from other film layers under the action of bending stress, which reduces the firmness of the flexible display panel and is not conducive to the subsequent normal operation of the flexible display panel. Summary of the invention

[0005] The embodiments of the present invention provide a display assembly and an assembly method thereof, and a display device, which are used to solve the problem that a flexible display panel is easily peeled off from other film layers after being bent.

[0006] To achieve the above-mentioned purpose, in the first aspect, an embodiment of the present invention provides a display component, including a flexible display panel, a circuit board, a diaphragm assembly, a cover plate, a first supporting layer and a second supporting layer, wherein the flexible display panel includes a panel body and a bending portion, along the extension direction of the bending portion, the first end of the bending portion is connected to one side edge of the panel body, and the second end is located on the back side of the panel body; the circuit board is arranged on the back side of the panel body and connected to the second end of the bending portion; the diaphragm assembly is stacked on the display side of the panel body, and the diaphragm assembly includes at least one of a polarizer and a touch panel; the cover plate is stacked on the side of the diaphragm assembly away from the panel body; the first supporting layer is stacked on the back side of the panel body and is located between the panel body and the bending portion; the second supporting layer is arranged at the first end of the bending portion and is located between the cover plate and the bending portion, and the second supporting layer is configured to support the bending portion.

[0007] In some embodiments, the second supporting layer is an elastic supporting layer or a rigid supporting layer, one side surface of the second supporting layer is bonded to the cover plate, and the other side surface is against the bending portion.

[0008] In some embodiments, the elastic support layer is a PET layer or a rubber layer; the rigid support layer is a first steel sheet layer.

[0009] In some embodiments, the display component also includes a first back film and a second back film, the first back film is stacked on the back surface of the panel body, and a portion of the first back film is located between the first supporting layer and the panel body; the second back film is stacked between the first supporting layer and the bending portion; the side edge of the arched section of the first back film close to the bending portion exceeds the side edge of the arched section of the second back film close to the bending portion.

[0010] In some embodiments, the side edge of the arched section of the first back film close to the bending portion exceeds the side edge of the arched section of the second back film close to the bending portion by a distance in the range of 30 to 90 μm.

[0011] In some embodiments, the bending portion includes a base connected between the panel body and the circuit board, and a cured adhesive layer covering the outer surface of the base; along the extension direction of the bending portion, one end of the cured adhesive layer is bonded to the edge of the diaphragm assembly, and the other end is located at the junction of the base and the circuit board.

[0012] In some embodiments, the display assembly further includes: a second steel sheet layer stacked on the back side of the panel body, wherein a portion of the second steel sheet layer is located between the panel body and the first supporting layer.

[0013] In some embodiments, the diaphragm assembly includes a touch panel, which is separated from the panel body; the display assembly also includes a flexible circuit board, one end of the flexible circuit board is connected to a side edge of the touch panel, and the other end is connected to the circuit board; along a first direction, the second supporting layer and the flexible circuit board are staggered, and the first direction is perpendicular to the thickness direction of the panel body and the extension direction of the bending portion.

[0014] In some embodiments, the film assembly includes a first adhesive layer, a polarizer, a second adhesive layer, the touch panel and a third adhesive layer stacked in sequence, the first adhesive layer is located between the polarizer and the panel body, and the third adhesive layer is located between the touch panel and the cover plate.

[0015] In some embodiments, the flexible display panel is a flexible display panel integrated with a touch layer; the membrane assembly includes a fourth adhesive layer, the polarizer and a fifth adhesive layer stacked in sequence, the fourth adhesive layer is located between the polarizer and the panel body, and the fifth adhesive layer is located between the polarizer and the cover plate; along the first direction, the size of the second supporting layer is adapted to the size of the bending portion, and the first direction is perpendicular to the thickness direction of the panel body and the extension direction of the bending portion.

[0016] In a second aspect, an embodiment of the present invention provides a display device, comprising a housing and the display assembly described in the first aspect, wherein the display assembly is disposed on the housing.

[0017] In the third aspect, an embodiment of the present invention provides an assembly method for the display component described in the first aspect, comprising: providing a flexible display panel; wherein the back surface of the flexible display panel is covered with a back film; binding a circuit board at the end of the bending portion of the flexible display panel away from the panel body; sequentially arranging a membrane assembly and a cover plate on the display side surface of the panel body, and arranging a second supporting layer between the cover plate and the bending portion; removing the back film on the to-be-bent area of ​​the bending portion to divide the back film into a first back film covering the panel body and a second back film covering the bending portion; arranging a first supporting layer on the side of the first back film away from the panel body; bending the bending portion so that the second back film is opposite to the first supporting layer; pressing the bending portion toward the first supporting layer so that the second back film is bonded to the first supporting layer.

[0018] In some embodiments, the bending portion is bent so that the second back film is opposite to the first supporting layer, including: bending the bending portion so that the second back film is opposite to the first supporting layer, and the side edge of the arched section of the first back film close to the bending portion exceeds the side edge of the curved section of the second back film close to the bending portion.

[0019] The display component and its assembly method, and the display device provided by the embodiments of the present invention, by arranging the second supporting layer between the cover plate and the bending portion, the second supporting layer can provide support for the bending portion when the pressure head presses the bent portion toward the first supporting layer, so as to prevent the arched section of the bending portion from undergoing a large bending deformation under the action of the pressure of the pressure head. Then, when the pressure head removes the pressure, the arched section of the bending portion can be prevented from rebounding to cause the bending portion to peel off from the first supporting layer, thereby ensuring the firmness of the bonding between the bending portion and the first supporting layer, and further ensuring the normal operation of the flexible display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of a display component in the related art before the flexible display panel is bent;

[0022] Figure 2 for Figure 1 A schematic diagram of the display assembly shown after the flexible display panel is bent;

[0023] Figure 3 is a schematic structural diagram of a display device in some embodiments of the present invention;

[0024] Figure 4 for Figure 3 AA section view;

[0025] Figure 5 for Figure 3 BB section view;

[0026] Figure 6 for Figure 5 A right view of the display assembly in FIG.

[0027] Figure 7 Schematic cross-sectional views of display devices in other embodiments of the present invention;

[0028] Figure 8 for Figure 7 A right view of the display assembly in FIG.

[0029] Fig. 9 Shown Figure 5 The assembly process diagram of the display assembly shown in ;

[0030] Fig.10 Shown Figure 7 The assembly process diagram of the display assembly shown in ;

[0031] Fig.11 Shown is a flow chart of a method for assembling a display assembly in some embodiments of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments provided by the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0033] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and other forms thereof, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open, inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present invention. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics described may be included in any one or more embodiments or examples in any appropriate manner.

[0034] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, unless otherwise specified, "plurality" means two or more.

[0035] When describing some embodiments, the term "connected" and its derivative expressions may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0036] “At least one of A, B, and C” has the same meaning as “at least one of A, B, or C” and both include the following combinations of A, B, and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C.

[0037] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0038] The use of "adapted to" or "configured to" herein is meant to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0039] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0040] As used herein, "about" or "approximately" includes the stated value and the average value that is within an acceptable range of deviation from the particular value, where the acceptable range of deviation is determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0041] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include deviations in shape due to, for example, manufacturing. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shapes of regions of the device, and are not intended to limit the scope of the exemplary embodiments.

[0042] like Figure 1 As shown, Figure 1 The figure shows a schematic diagram of a display assembly in the related art before the flexible display panel 01 is bent. The display assembly includes a flexible display panel 01, and the flexible display panel 01 includes a panel body 011, a bending portion 012 connected to one side of the panel body 011, a first back film 021 covering the back surface (upper surface in the figure) of the panel body 011, and a second back film 022 covering the bending portion 012;

[0043] The display side surface (lower side surface in the figure) of the panel body 011 is sequentially laminated with a first adhesive layer 03, a touch panel 04, a polarizer 05, a second adhesive layer 06 and a cover plate 07, and a first support layer 08 is laminated on the side of the first back film 021 away from the panel body 011. The cover plate 07 is placed on the panel carrier 091, and one end of the bent portion 012 is placed on the circuit board carrier 092.

[0044] like Figure 2 As shown, Figure 2 Shown Figure 1The display assembly shown is a schematic diagram after the flexible display panel 01 is bent. The bending portion 012 of the flexible display panel 01 is bent so that the second back film 022 is opposite to the first support layer 08, and then the pressing head 093 presses the bending portion 012 downward to bond the second back film 022 to the first support layer 08.

[0045] Since there is no support below the bending portion 012 and the film material of the bending portion 012 itself has a certain elasticity, when the pressure head 093 presses the bending portion 012, the arched section of the bending portion 012 will bend downward and deform. When the pressure head 093 removes the pressure, the arched section of the bending portion 012 rebounds upward under the action of its own elastic force, and the second back film 022 and the first support layer 08 cannot fit together (such as Figure 2 As shown), the second back film 022 and the first supporting layer 08 are peeled off, which reduces the firmness of the fixation between the flexible display panel 01 and the first supporting layer 08, which is not conducive to the normal operation of the flexible display panel 01.

[0046] In the embodiment of the present invention, a second supporting layer is provided between the cover plate and the bending portion of the flexible display panel to support the bending portion, thereby preventing the second back film from peeling off from the first supporting layer due to rebound of the bending portion after the pressure head is removed.

[0047] The display device provided in the embodiment of the present invention may be a display device having a flexible display panel, such as a mobile phone, a tablet computer, or a television, and is not specifically limited here.

[0048] The structure of the display device is described below using a mobile phone as an example. Other types of display devices may be specifically configured with reference to the structure in the mobile phone embodiment.

[0049] like Figure 3 As shown, Figure 3 A front view of a display device (mobile phone) in some embodiments of the present invention is shown. The display device includes a housing 200 and a display assembly 100 disposed on the housing 200, wherein reference numeral b indicates a display area of ​​the display device.

[0050] like Figure 4 and Figure 5 As shown, Figure 4 for Figure 3 AA section view, Figure 5 for Figure 3 The housing 200 includes a front housing 210 and a rear housing 220. The front housing 210 includes a front housing bottom wall 211 and a front housing side wall 212 located at the periphery of the front housing bottom wall 211. The front housing side wall 212 is provided with a flange 213 extending toward the outside of the front housing 210.

[0051] The rear shell 220 includes a rear shell bottom wall 221 and a rear shell side wall 222 located at the periphery of the rear shell bottom wall 221. The rear shell side wall 222 is stuck on the outside of the front shell side wall 212 and abuts against the flange 213, so that the front shell 210 and the rear shell 220 are buckled together, and a setting space 230 is formed between the front shell bottom wall 211 and the rear shell bottom wall 221. By configuring the housing 200 as the front shell 210 and the rear shell 220 buckled together, it is convenient to disassemble, assemble and replace the components in the setting space 230.

[0052] like Figure 5 As shown, the display assembly 100 includes a flexible display panel 1, a circuit board 2, a membrane assembly 3, a cover plate 4, a first back film 13, a second back film 14, a first support layer 5 and a second support layer 6;

[0053] The flexible display panel 1 is a flexible display panel integrated with a touch layer. The flexible display panel 1 includes a panel body 11 and a bending portion 12. Along the extending direction of the bending portion 12, the first end ( Figure 5 The a end shown in FIG. 1 is connected to one side edge of the panel body 11, and the second end ( Figure 5 The end b shown in FIG. 1 is located on the back side of the panel body 11 (that is, the side opposite to the display side). Figure 5 (shown below).

[0054] The first back film 13 is stacked on the back surface of the panel body 11 , and the second back film 14 is stacked on the inner surface of the bending portion 12 (ie, the side surface of the bending portion 12 away from the front shell 210 ).

[0055] The flexible display panel 1 may be an OLED (Organic Light-Emitting Diode) panel, or other flexible panels, which are not specifically limited herein.

[0056] The cover plate 4 and the diaphragm assembly 3 are stacked in sequence on the display side of the panel body 11, and the cover plate 4 covers the opening of the front shell 210. The diaphragm assembly 3 includes a fourth adhesive layer 31, a polarizer 32 and a fifth adhesive layer 33 stacked in sequence. The fourth adhesive layer 31 is located between the polarizer 32 and the panel body 11, and the fifth adhesive layer 33 is located between the polarizer 32 and the cover plate 4.

[0057] The fourth adhesive layer 31 and the fifth adhesive layer 33 may both be OCA (Optically Clear Adhesive) layers, but are not limited thereto, and may also be other adhesive layers capable of achieving bonding.

[0058] The first supporting layer 5 is stacked on the back side of the panel body 11 and is located between the panel body 11 and the bending portion 12 . Specifically, the first supporting layer 5 is disposed close to the bending portion 12 and is located between the first back film 13 and the second back film 14 .

[0059] The first supporting layer 5 may be a foam adhesive layer (ie, a Foam layer), or a PET (Polyethyleneterephthalate) adhesive tape, which is not specifically limited herein.

[0060] The circuit board 2 is disposed on the back side of the panel body 11 and one end is connected to the second end of the bent portion 12, and the other end is electrically connected to the main board 300 located in the setting space 230 through a connector 400 (such as a board-to-board connector). The circuit board 2 can be a flexible circuit board, but is not limited thereto, and a non-flexible circuit board is also acceptable.

[0061] The second supporting layer 6 is disposed at the first end of the bending portion 12 ( Figure 5 The second support layer 6 is located at the end a shown in the figure, and is located between the cover plate 4 and the bent portion 12, and the second support layer 6 is configured to support the bent portion 12. By arranging the second support layer 6 between the cover plate 4 and the bent portion 12, in the process of the pressure head pressing the bent portion 12 toward the first support layer 5, the second support layer 6 can provide support for the bent portion 12 to prevent the arched section of the bent portion 12 from being greatly bent and deformed under the pressure of the pressure head, so that when the pressure head removes the pressure, the arched section of the bent portion 12 can be prevented from rebounding to cause the bent portion 12 to be peeled off from the first support layer 5, thereby ensuring the firmness of the bonding between the bent portion 12 and the first support layer 5, and further ensuring the normal operation of the flexible display panel 1.

[0062] In some embodiments, in order to enable the second supporting layer 6 to provide better support for the bending portion 12, as shown in FIG. Figure 6 As shown, Figure 6 Shown Figure 5 . Along the first direction X, the size m1 of the second supporting layer 6 is adapted to the size m2 of the bending portion 12, and the first direction X is perpendicular to the thickness direction of the panel body 11 and the extension direction of the bending portion 12. "Adapted" here means that the size of the second supporting layer 6 is equal to or similar to the size of the bending portion 12. By setting the size m1 of the second supporting layer 6 to be adapted to the size m2 of the bending portion 12, the second supporting layer 6 can support the bending portion 12 as a whole in the first direction X, so that the supporting force of the second supporting layer 6 on the bending portion 12 in the first direction X is balanced, and the bending portion 12 is prevented from tilting in the first direction X, which is beneficial to improve the supporting effect of the second supporting layer 6 on the bending portion 12.

[0063] The type of the second supporting layer 6 is not unique. In some embodiments, for example Figure 5 As shown, the second supporting layer 6 is an elastic supporting layer, one side surface of the elastic supporting layer is bonded to the cover plate 4 (for example, it can be bonded to the cover plate through an adhesive layer c), and the other side surface is against the bent portion 12. By setting the second supporting layer 6 as an elastic supporting layer, when the pressure head presses the bent portion 12 toward the first supporting layer 5, the elastic supporting layer can provide a certain amount of compression, thereby playing a role of buffering and protecting the bent portion 12.

[0064] In this embodiment, the elastic support layer can be a PET layer, which has excellent mechanical properties and a good tensile strength and impact strength ratio, so that it can better support the bending portion 12. In addition to the PET layer, the elastic support layer can also be a rubber layer, which has good elasticity and hardness, can provide a certain amount of compression to provide a buffering protection for the bending portion 12, and has a certain hardness to provide a good support for the bending portion 12.

[0065] In other embodiments, the second supporting layer 6 is a rigid supporting layer, one side surface of the rigid supporting layer is bonded to the cover plate 4, and the other side surface is against the bent portion 12. The second supporting layer 6 is set as a rigid supporting layer, so that when the pressure head presses the bent portion 12 toward the first supporting layer 5, the rigid supporting layer can provide stronger support for the bent portion 12, so that the bent portion 12 can withstand a greater pressure from the pressure head.

[0066] In this embodiment, the rigid support layer may be a first steel sheet layer (eg, a stainless steel sheet layer). Compared with other metal layers, the steel sheet layer has advantages such as high strength, good plasticity and toughness, and can provide better support for the bending portion 12 .

[0067] In some embodiments, in order to reduce the stress at the junction of the bent portion 12 and the second back film 14, as shown in FIG. Figure 5 As shown, the side edge e of the arched section of the first back film 13 near the bend 12 exceeds the side edge f of the arched section of the second back film 14 near the bend 12. This design can make the transition of the bend 12 from the arched section to the first straight section (that is, the part of the bend 12 located below the second back film 14) smoother, avoiding excessive stress at the junction of the bend 12 and the second back film 14 caused by too small a turning angle between the two, thereby greatly reducing the risk of metal traces (such as SD traces) on the bend 12 breaking. At the same time, this design can also move the arch top of the arched section of the bend 12 away from the front shell side wall 212, greatly reducing the risk of collision between the arched section of the bend 12 and the front shell side wall during the assembly of the display component and the front shell.

[0068] Among them, Figure 5 As shown, the distance d by which the side edge e of the arched section of the first back film 13 near the bending portion 12 exceeds the side edge f of the arched section of the second back film 14 near the bending portion 12 should not be too large or too small. If d is too large, the turning angle between the arched section of the bending portion 12 and the second straight section (that is, the portion of the bending portion 12 located above the first back film 13) will be reduced, thereby increasing the stress at the junction of the bending portion 12 and the first back film 13; if d is too small, it is not conducive to significantly reducing the stress at the junction of the bending portion 12 and the second back film 14. It has been found through research that when d is in the range of 30 to 90 μm, it can not only significantly reduce the stress at the junction of the bending portion 12 and the second back film 14, but also avoid excessive stress at the junction of the bending portion 12 and the first back film 13.

[0069] In some embodiments, Figure 5 As shown, the bending portion 12 includes a base 121 connected between the panel body 11 and the circuit board 2, and a curing adhesive layer 122 covering the outer surface of the base 121. By providing the curing adhesive layer 122 on the outer surface of the base 121, the bending portion 12 can be shaped and hardened after the curing adhesive layer 122 is cured, and when the bending portion 12 is subjected to external force, the bending portion 12 itself (especially the arched section) is prevented from being greatly deformed, thereby ensuring the consistency of the shape of the bending portion 12 after bending in mass production.

[0070] The curing adhesive layer 122 has a different covering position on the bending portion 12. In some implementations, the curing adhesive layer 122 can completely cover the base 121 in the extending direction of the bending portion 12. Figure 5 As shown, along the extension direction of the bending portion 12, one end of the cured adhesive layer 122 is bonded to the edge of the diaphragm assembly 3, and the other end is located at the junction of the base 121 and the circuit board 2. In other embodiments, the cured adhesive layer 122 can also cover the arched section of the bending portion 12. Compared with the embodiment in which the cured adhesive layer 122 covers the arched section of the bending portion 12, Figure 5 In the embodiment shown, since the cured adhesive layer 122 can completely cover the base 121 in the extension direction of the bending portion 12, it is more conducive to the overall shaping of the base 121 after the cured adhesive layer 122 is cured; at the same time, since one end of the cured adhesive layer 122 is bonded to the edge of the diaphragm assembly 3, the junction between the bending portion 12 and the diaphragm assembly 3 can be bonded more firmly, which greatly reduces the risk of peeling at the junction between the base 121 and the diaphragm assembly 3 during the bending process.

[0071] In some embodiments, Figure 5As shown, the display assembly also includes: a second steel sheet layer 7 stacked on the back side of the panel body 11, and a part of the second steel sheet layer 7 is located between the panel body 11 and the first support layer 5. Since the second steel sheet layer 7 has a certain strength, the second steel sheet layer 7 can support the panel body 11, so that the panel body 11 can maintain a certain shape and avoid large deformation of the panel body 11. Since the second steel sheet layer 7 has a certain toughness, the panel body 11 can still be folded, curled, etc. according to actual needs; in addition, the heat conduction rate of the second steel sheet layer 7 is relatively fast, which can also play a role in heat dissipation for the panel body 11.

[0072] The second steel sheet layer 7 may be a stainless steel sheet layer.

[0073] Figure 7 Shown are cross-sectional schematic diagrams of display devices in other embodiments of the present invention. Figure 7 The structure shown in Figure 5 The structures shown differ in that: Figure 7 The touch panel 36 and the panel body 11 are separately arranged.

[0074] like Figure 7 As shown, the film assembly 3 includes a first adhesive layer 34, a polarizer 32, a second adhesive layer 35, a touch panel 36 and a third adhesive layer 37 which are stacked in sequence, the first adhesive layer 34 is located between the polarizer 32 and the panel body 11, and the third adhesive layer 37 is located between the touch panel 36 and the cover plate 4; the display assembly also includes a flexible circuit board 8, one end of the flexible circuit board 8 is connected to one side edge of the touch panel 36, and the other end is connected to the circuit board 2. In this embodiment, since the touch panel 36 is relatively close to the cover plate 4, the touch panel 36 can better sense the touch of the user's finger, which is conducive to improving the sensitivity of the touch panel 36.

[0075] The first adhesive layer 34 , the second adhesive layer 35 , and the third adhesive layer 37 may all be OCA layers, but are not limited thereto, and may also be other adhesive layers capable of achieving bonding.

[0076] Of course, in addition to Figure 7 In addition to the structure of the membrane assembly 3 shown in FIG, the polarizer 32 can also be arranged on the side of the touch panel 36 close to the cover plate 4. The polarizer 32 can be arranged separately from the touch panel 36, or can be integrated with the touch panel 36, which can be determined according to the actual situation.

[0077] like Figure 8 As shown, Figure 8 Shown Figure 7. The second supporting layer 6 and the flexible circuit board 8 are staggered along the first direction X. By staggering the second supporting layer 6 and the flexible circuit board 8, interference between the flexible circuit board 8 and the second supporting layer 6 is avoided, ensuring that the flexible circuit board 8 is smoothly connected to the circuit board 2.

[0078] In some embodiments, in order to avoid interference between the flexible circuit board 8 and the driving chip 123 on the bending portion 12, as shown in FIG. Figure 8 As shown, the flexible circuit board 8 includes two sub-circuit boards 81, which are arranged in a spaced relationship along the first direction X and are respectively located on both sides of the driving chip 123. In this way, not only the position interference between the flexible circuit board 8 and the driving chip 123 is avoided, but also the arrangement between the flexible circuit board 8 and the bending portion 12 is made more compact, and the space between the display component and the front shell side wall 212 (that is, the space of the lower frame) is fully utilized, so as to help reduce the size of the lower frame of the display device.

[0079] Among them, Figure 8 As shown, the first supporting layer 5 includes a first sub-supporting layer 61, a second sub-supporting layer 62 and a third sub-supporting layer 63. Along the first direction X, the first sub-supporting layer 61 and the second sub-supporting layer 62 are respectively located on both sides of one of the sub-circuit boards 81, and the second sub-supporting layer 62 and the third sub-supporting layer 63 are respectively located on both sides of the other sub-circuit board 81. By designing the first supporting layer 5 into three sections, the two sub-circuit boards 81 can be well avoided, so that there is no structural interference between the first supporting layer 5 and the two sub-circuit boards 81.

[0080] Figure 7 and Figure 8 For details on other structures in the display device shown in Figure 5 and Figure 6 The description of the display device shown in will not be repeated here.

[0081] The embodiment of the present invention also provides a method for assembling a display assembly, such as Fig. 9 and Fig.11 As shown, Fig. 9 Shown Figure 5 The schematic diagram of the assembly process of the display assembly shown in FIG. Fig.11 The flowchart of the assembly method of the display assembly is shown, and the assembly method comprises:

[0082] S1, such as Fig. 9 As shown in (1), a flexible display panel 1 is provided;

[0083] The back surface of the flexible display panel 1 is covered with a back film 15, and the display surface of the flexible display panel 1 is covered with an upper back film 16; the back film 15 and the upper back film 16 can protect the flexible display panel 1 to prevent the flexible display panel 1 from being scratched or damaged. At the same time, during the assembly process, the back film 15 can also support the flexible display panel 1 to facilitate subsequent assembly with other film layers. The part of the flexible display panel 1 on the left side of the dotted line in the figure is the panel body 11, and the part on the right side of the dotted line is the bending part 12.

[0084] S2, such as Fig. 9 As shown in (2), the circuit board 2 is bound to one end of the bending portion 12 of the flexible display panel 1 away from the panel body 11;

[0085] The upper backing film 16 needs to be removed before binding the circuit board 2. The upper backing film 16 can be removed by laser irradiation or chemically, such as by using a dissolving liquid.

[0086] When binding the circuit board 2 , the binding pins on the circuit board 2 and the binding pins on the end of the bending portion 12 away from the panel body 11 can be connected through conductive glue to achieve binding of the circuit board 2 .

[0087] S3, such as Fig. 9 As shown in (3), a film assembly 3 and a cover plate 4 are sequentially arranged on the display side surface of the panel body 11, and a second supporting layer 6 is arranged between the cover plate 4 and the bending portion 12;

[0088] The sequential arrangement of the film assembly 3 and the cover plate 4 on the display side surface of the panel body 11 specifically includes: sequentially arranging a fourth adhesive layer 31 , a polarizer 32 , a fifth adhesive layer 33 and the cover plate 4 on the display side surface of the panel body 11 .

[0089] The second supporting layer 6 can be disposed between the cover plate 4 and the bending portion 12 by adhering the second supporting layer 6 to the surface of the cover plate 4 corresponding to the bending portion 12. When the cover plate 4 is bonded to the fifth adhesive layer 33, the second supporting layer 6 is also disposed between the cover plate 4 and the bending portion 12. This can facilitate the arrangement of the second supporting layer 6, simplify the assembly steps of the display assembly, and thus help improve the assembly efficiency.

[0090] Of course, in addition to this, the second supporting layer 6 can also be disposed between the cover plate 4 and the bending portion 12 after the cover plate 4 is bonded to the fifth adhesive layer 33 .

[0091] While the film assembly 3 is disposed on the display side surface of the panel body 11 , a curing adhesive layer 122 may also be coated so that the curing adhesive layer 122 covers the base 121 of the bending portion 12 .

[0092] S4, such as Fig. 9 As shown in (4), the backing film 15 on the to-be-bent area of ​​the bending portion 12 (that is, the area for forming the arched section of the bending portion 12) is removed to divide the backing film 15 into a first backing film 13 covering the panel body 11 and a second backing film 14 covering the bending portion 12;

[0093] The method of removing the back film 15 on the to-be-bent area is similar to the method of removing the upper back film 16 , and can be removed by laser or chemical means, which is not specifically limited here.

[0094] S5, such as Fig. 9 As shown in (5), a first supporting layer 5 is provided on the side of the first backing film 13 away from the panel body 11;

[0095] The first supporting layer 5 may be directly bonded to the back surface of the panel body 11 , or may be bonded to the second steel sheet layer 7 located on the back side of the panel body 11 , which is not specifically limited here.

[0096] S6, such as Fig. 9 As shown in (6), the bending portion 12 is bent so that the second backing film 14 is opposite to the first supporting layer 5;

[0097] The second back film 14 relative to the first supporting layer 5 specifically refers to that the orthographic projection of the second back film 14 on the flexible display panel 1 overlaps with the orthographic projection of the first supporting layer 5 on the flexible display panel 1 .

[0098] Before the bending portion 12 is bent, Fig. 9 The display assembly shown in (5) is flipped upside down, that is, the cover plate 4 is set on the panel carrier, the second end of the bending portion 12 is set on the circuit board carrier, and then the circuit board carrier is flipped relative to the panel carrier to achieve the bending of the bending portion 12.

[0099] S7, such as Fig. 9 As shown in (7), the bent portion 12 is pressed toward the first supporting layer 5 so that the second backing film 14 is bonded to the first supporting layer 5.

[0100] After the second back film 14 and the first supporting layer 5 are aligned, the bending portion 12 is vertically pressed toward the first supporting layer 5 by a pressing head, and the second back film 14 and the first supporting layer 5 are bonded together under the pressure of the pressing head.

[0101] In some embodiments, Fig. 9As shown in (6), S6 includes: bending the bending portion 12 so that the second back film 14 is opposite to the first supporting layer 5, and the side edge of the arched section of the first back film 13 close to the bending portion 12 is beyond the side edge of the arched section of the second back film 14 close to the bending portion 12, that is, pulling the bending portion 12 to the left for a distance so that the side edge of the arched section of the second back film 14 close to the bending portion 12 is staggered with the side edge of the curved section of the first back film 13 close to the bending portion 12. In this way, the transition of the bending portion 12 from the arched section to the first straight section (the part of the bending portion 12 located above the second back film 14 in the figure) can be made smoother, and the stress at the junction of the bending portion 12 and the second back film 14 can be improved, thereby greatly reducing the risk of metal wiring on the bending portion 12 being broken; at the same time, this can also greatly reduce the risk of the arched section of the bending portion 12 colliding with the side wall 212 of the front shell during the assembly process of the display component 200 and the front shell 210.

[0102] like Fig.10 and Fig.11 As shown, Fig.10 Shown Figure 7 The schematic diagram of the assembly process of the display assembly shown in FIG. 1 includes:

[0103] S1, such as Fig.10 As shown in (1), a flexible display panel 1 is provided;

[0104] The back surface of the flexible display panel 1 is covered with a back film 15 , and the display side surface of the flexible display panel 1 is covered with an upper back film 16 .

[0105] S2, such as Fig.10 As shown in (2), the circuit board 2 is bound to one end of the bending portion 12 of the flexible display panel 1 away from the panel body 11;

[0106] S3, such as Fig.10 As shown in (3), a film assembly 3 and a cover plate 4 are sequentially arranged on the display side surface of the panel body 11, and a second supporting layer 6 is arranged between the cover plate 4 and the bending portion 12;

[0107] Among them, the film assembly 3 and the cover plate 4 are sequentially arranged on the display side surface of the panel body 11, which specifically includes: the first adhesive layer 34, the polarizer 32, the second adhesive layer 35, the touch panel 36, the third adhesive layer 37 and the cover plate 4 are sequentially arranged on the display side surface of the panel body 11.

[0108] After the touch panel 36 is bonded to the second adhesive layer 35 , one end of the flexible circuit board 8 is bonded to one edge of the touch panel 36 close to the bending portion 12 , and the other end is bonded to the circuit board 2 .

[0109] like Figure 8As shown, when the second supporting layer 6 is provided, the second supporting layer 6 needs to be staggered with the flexible circuit board 8 in the first direction X to avoid structural interference between the second supporting layer 6 and the flexible circuit board 8 .

[0110] S4, such as Fig.10 As shown in (4), the back film 15 on the to-be-bent area of ​​the bending portion 12 is removed to separate the back film into a first back film 13 covering the panel body 11 and a second back film 14 covering the bending portion 12;

[0111] S5, such as Fig.10 As shown in (5), a first supporting layer 5 is provided on the side of the first backing film 13 away from the panel body 11;

[0112] S6, such as Fig.10 As shown in (6), the bending portion 12 is bent so that the second backing film 14 is opposite to the first supporting layer 5;

[0113] S7, such as Fig.10 As shown in (7), the bent portion 12 is pressed toward the first supporting layer 5 so that the second backing film 14 is bonded to the first supporting layer 5.

[0114] Fig.10 The assembly method shown is Fig. 9 The same steps in the assembly method shown in the figure can be referred to in detail. Fig. 9 The description of the assembly method shown in will not be repeated here.

[0115] The features that appear in the embodiment of the assembly method of the display component and are the same or similar to those in the product embodiment of the display component mentioned above can be specifically referred to the description in the product embodiment of the display component mentioned above, and will not be repeated here.

[0116] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0117] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be thought of by any person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A display component, characterized in that: include: A flexible display panel, the flexible display panel comprising a panel body and a bending portion, wherein along an extension direction of the bending portion, a first end of the bending portion is connected to a side edge of the panel body, and a second end is located at a back side of the panel body; A driving chip, located on the bent portion; A circuit board, the circuit board is arranged on the back side of the panel body and connected to the second end of the bending portion; A membrane assembly, the membrane assembly is stacked on the display side of the panel body, and the membrane assembly includes at least one of a polarizer and a touch panel; A cover plate, the cover plate being stacked on a side of the diaphragm assembly away from the panel body; A first supporting layer, wherein the first supporting layer is stacked on the back side of the panel body and located between the panel body and the bending portion; a second supporting layer, the second supporting layer being disposed at a first end of the bending portion and being located between the cover plate and the bending portion, the second supporting layer being configured to support the bending portion; A first backing film, the first backing film is stacked on the back surface of the panel body, and a portion of the first backing film is located between the first supporting layer and the panel body; A second backing film, the second backing film is stacked between the first supporting layer and the bending portion; The side edge of the arched section of the first back film close to the bending portion is beyond the side edge of the arched section of the second back film close to the bending portion.

2. The display assembly according to claim 1, characterized in that The second supporting layer is an elastic supporting layer or a rigid supporting layer. One side surface of the second supporting layer is bonded to the cover plate, and the other side surface is against the bending portion.

3. The display assembly according to claim 2, characterized in that: The elastic support layer is a PET layer or a rubber layer; the rigid support layer is a first steel sheet layer.

4. The display assembly according to claim 1, characterized in that: The side edge of the arched section of the first back film close to the bending portion exceeds the side edge of the arched section of the second back film close to the bending portion by a distance in the range of 30 to 90 μm.

5. The display assembly according to any one of claims 1 to 3, characterized in that: The bending portion includes a base connected between the panel body and the circuit board, and a curing adhesive layer covering the outer surface of the base; Along the extending direction of the bending portion, one end of the curing adhesive layer is bonded to the edge of the diaphragm assembly, and the other end is located at the junction of the base and the circuit board.

6. The display assembly according to any one of claims 1 to 3, characterized in that: Also includes: A second steel sheet layer is stacked on the back side of the panel body, and a portion of the second steel sheet layer is located between the panel body and the first supporting layer.

7. The display assembly according to any one of claims 1 to 3, characterized in that: The membrane assembly includes a touch panel, and the touch panel is separately arranged from the panel body; The display assembly further includes a flexible circuit board, one end of which is connected to one side edge of the touch panel, and the other end of which is connected to the circuit board; Along a first direction, the second supporting layer and the flexible circuit board are staggered, and the first direction is perpendicular to the thickness direction of the panel body and the extending direction of the bending portion.

8. The display assembly according to claim 7, characterized in that: The film assembly includes a first adhesive layer, a polarizer, a second adhesive layer, the touch panel and a third adhesive layer which are stacked in sequence, the first adhesive layer is located between the polarizer and the panel body, and the third adhesive layer is located between the touch panel and the cover plate.

9. The display assembly according to any one of claims 1 to 3, characterized in that: The flexible display panel is a flexible display panel integrated with a touch layer; The film assembly includes a fourth adhesive layer, the polarizer, and a fifth adhesive layer stacked in sequence, the fourth adhesive layer is located between the polarizer and the panel body, and the fifth adhesive layer is located between the polarizer and the cover plate; Along the first direction, the size of the second supporting layer is adapted to the size of the bending portion, and the first direction is perpendicular to the thickness direction of the panel body and the extending direction of the bending portion.

10. A display device, characterized in that: The invention comprises a housing and the display assembly according to any one of claims 1 to 9, wherein the display assembly is arranged on the housing.

11. An assembly method for a display assembly according to any one of claims 1 to 9, characterized in that: include: A flexible display panel is provided; wherein the back surface of the flexible display panel is covered with a back film; Binding a circuit board to an end of the bent portion of the flexible display panel away from the panel body; A film assembly and a cover plate are sequentially arranged on the display side surface of the panel body, and a second supporting layer is arranged between the cover plate and the bending portion; Removing the backing film on the to-be-bent region of the bending portion to separate the backing film into a first backing film covering the panel body and a second backing film covering the bending portion; A first supporting layer is arranged on a side of the first backing film away from the panel body; Bend the bending portion so that the second backing film is opposite to the first supporting layer, and the side edge of the arched section of the first backing film close to the bending portion is beyond the side edge of the curved section of the second backing film close to the bending portion; The bent portion is pressed toward the first supporting layer to bond the second backing film to the first supporting layer.

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