(19)
(11)EP 2 894 689 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
11.12.2019 Bulletin 2019/50

(21)Application number: 12878649.8

(22)Date of filing:  21.12.2012
(51)International Patent Classification (IPC): 
H01L 51/56(2006.01)
(86)International application number:
PCT/CN2012/087184
(87)International publication number:
WO 2014/012338 (23.01.2014 Gazette  2014/04)

(54)

METHOD FOR MANUFACTURING FLEXIBLE DISPLAY DEVICE

VERFAHREN ZUR HERSTELLUNG EINER FLEXIBLEN ANZEIGEVORRICHTUNG

PROCÉDÉ DE FABRICATION D'UN DISPOSITIF D'AFFICHAGE FLEXIBLE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 16.07.2012 CN 201210246028

(43)Date of publication of application:
15.07.2015 Bulletin 2015/29

(73)Proprietor: BOE Technology Group Co., Ltd.
Beijing 100015 (CN)

(72)Inventors:
  • QIAO, Yong
    BDA Beijing 100176 (CN)
  • WANG, Hongli
    BDA Beijing 100176 (CN)
  • WANG, Yanli
    BDA Beijing 100176 (CN)

(74)Representative: Klunker IP Patentanwälte PartG mbB 
Destouchesstraße 68
80796 München
80796 München (DE)


(56)References cited: : 
EP-A1- 1 933 401
CN-A- 101 038 857
CN-A- 102 810 512
CN-A- 1 694 589
CN-A- 101 202 329
US-A1- 2008 110 862
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    TECHNICAL FIELD



    [0001] Embodiments of present invention relate to a method for manufacturing a flexible display device.

    BACKGROUND



    [0002] In recent years, the display market is in an increasingly development, especially in the flat display field, such as liquid crystal display (LCD), plasma display (PDP), organic light-emitting display (OLED), etc., which have achieved more and more extensive applications due to their capability of being manufactured to be large-dimensional, thin and light weight display devices.

    [0003] The existing liquid crystal displays, plasma displays, organic light emitting display, however, mainly use glass substrates, and since a glass substrate is subjected to its disadvantages, such as friability, vulnerableness etc., it's applications in the fields of mobile display devices requiring portable, compact and light and the large sized display devices are limited. Therefore, in these days, it has attracted broad attention to manufacture the flexible display devices using a flexible substrate, such as plastic substrate, metal foil, etc., instead of glass substrate, and flexible display devices would also have broader growth space in the future display techniques.

    [0004] While flexible substrates process a series of advantages, they have deficiencies as well, that is, due to their flexibility and thermal expansion, it's inconvenient to process the display devices; the substrates are easy to sag and even corrugation or abruption occurs, making it difficult to accurately perform fabrication processes of the subsequent films. In order to overcome such problems, it's necessary for the flexible substrate to be adhered onto a rigid substrate, such as a glass substrate, to support and secure the flexible substrate so as to facilitate formation of the films and subsequently removing the support substrate. In this way, it's possible to make flexible display devices utilizing existing process equipments for glass substrates, thus achieving the purpose of simplifying technology and saving costs. However, this process also undoubtedly increases the process complexity and manufacturing costs, and substrates are easy to be damaged in the process of adhering and separating the flexible substrates, thus affecting product performance.

    [0005] EP 1 933 401 A1 discloses an organic light emitting display including a substrate, a semiconductor layer formed on the substrate, an organic light emitting diode formed on the semiconductor layer, an encapsulant formed on a periphery of the substrate which is an outer periphery of the organic light emitting diode and the semiconductor layer; and an encapsulation substrate attached to the encapsulant.

    [0006] US 2008/110862 A1 discloses a method for manufacturing a flexible display device in which a flexible substrate is acquired by forming display devices on one side of the substrate and thinning the substrate by removing surface portions on an opposite side of the substrate. The thickness of the substrate is changed from a first thickness, which gives rigidity to the substrate to the second thickness, which gives flexibility to the substrate.

    SUMMARY



    [0007] It is an object of present invention to provide a method for manufacturing a flexible display device, wherein with this method, two pieces of flexible display devices can be processed simultaneously during part of manufacturing processes, thereby improving production capacity, saving manufacturing costs and further improving product yield and production efficiency.

    [0008] The object is achieved by the respective features of the respective independent claims. Further embodiments are provided in the respective dependent claims.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0009] In order to illustrate the technical solution of the present invention more clearly, a simple introduction about the drawings of the embodiments will be made in the following. The drawings described later relate to only some embodiments of the present invention, rather than limitation to the present invention that is defined in the claims.

    Fig. 1 is a flow chart of an embodiment of the method of the present invention for manufacturing a flexible display device;

    Figs.2a-2d illustrate example that is not an embodiment of the present invention but helps to better understand the method of the present invention for manufacturing a flexible display device;

    Figs.3a-3b illustrates an embodiment of the method of the present invention for manufacturing a flexible display device;

    Figs.4a-4d illustrates another example that is not an embodiment of the present invention but helps to better understand the method of the present invention for manufacturing a flexible display device;

    Figs.5a-5d illustrates another embodiment of the method of the present invention for manufacturing a flexible display device;

    Figs.6a-6d illustrates another example that is not an embodiment of the present invention but helps to better understand the method of the present invention for manufacturing a flexible display device illustrated in Fig. 6e;

    Figs.7a-7f illustrates further examples that are not embodiments of the present invention but helps to better understand the method of the present invention for manufacturing a flexible display device; and

    Fig.8 illustrates a last example that is not an embodiment of the present invention but helps to better understand the method of the present invention for manufacturing a flexible display device.


    DETAILED DESCRIPTION



    [0010] To make clearer the object, technical solutions and advantages of the present invention, a clear and full description of the technical solution of the present invention will be made with reference to the accompanying drawings of embodiments of present invention. The described embodiments are merely part of the embodiments of the present invention, but not all the embodiments.

    [0011] Unless defined otherwise, the technical terms or scientific terminology being used should take the meaning usually understood by the ordinary skilled in this art of present invention. The words "first", "second" or the similar words used in the patent application specification and claims of the present invention do not mean any sequence, quantity or importance, but are only used to distinguish different components. Also, "a", "an", "the" or the like does not mean quantitative restriction, but refers to the existence of at least one. The words "comprise" or "contain" and similar words intend to mean that the elements or articles before the words encompass the elements or articles and the equivalent thereof listed after the words, and do not exclude other elements or articles. The word "connecting" or "coupling" and the like is not limited to physical or mechanical connection, but may comprise electrical connection regardless of being direct or indirect. Further, the phrases "on", "below", "left", "right" etc. are used only for describing a relative positional relationship, which will be varied correspondingly when the described objects are changed in its absolute position.

    [0012] The present invention provides a method for manufacturing a flexible display device, which can manufacture flexible display devices utilizing existing equipments and processing two flexible display devices simultaneously during part of the manufacturing processes.

    [0013] Flow Chart of Figure 1 of the method of the present invention for manufacturing a flexible display device

    [0014] Referring to Fig. 1, the method for manufacturing a flexible display device provided comprises the following steps.
    1. 1. Providing a first flexible substrate comprising a first surface and a second surface, and providing a second flexible substrate comprising a third surface and a fourth surface.
    2. 2. Joining the second surface of the first flexible substrate to the third surface of the second flexible substrate by a connecting element to form a laminated structure, wherein the first surface of the first flexible substrate and the second surface of the second flexible substrate work as the first, second outer surfaces of the laminated structure, respectively.
      In step 2, the connecting element may be any one of an adhesive layer, a vacuum adsorbable substrate, a fastener or other connection manor.
    3. 3. Forming a first flexible display element layer and a second flexible display element layer on the first, second outer surfaces of the laminated structure, respectively.
      The above step 3 further comprises: forming a first opposite flexible substrate and a second opposite flexible substrate on the first and second flexible display element layers, respectively, after the first and second outer surfaces of the laminated structure are formed with the first and second flexible display element layers thereon, respectively.
      In step 3, the flexible display element layer may be any one of an organic light emitting layer, a liquid crystal display layer, an electrophonic display layer, an electrowetting layer, an electroluminescent layer and so on.
    4. 4. Separating the first flexible substrate from the second flexible substrate of the laminated structure.


    [0015] In step 4, for different connecting elements, the corresponding separating operation may be any one of dissolution separating, laser separation, vacuum release, fastener removal, and so on.

    [0016] The method for manufacturing a flexible display device in this embodiment can manufacture a flexible display device utilizing existing equipments, and can processing two display devices at the same time, thus simplifying processes and achieving the purpose of improving production efficiency and cost-cutting.

    Example for better understanding the invention



    [0017] Referring to Figs. 2a-2d, examples for better understanding the method of the invention for manufacturing the flexible display device comprises the following steps.
    1. 1. Providing a first flexible substrate 101 comprising a first surface and a second surface, and providing a second flexible substrate 102 comprising a third surface and a fourth surface. The second surface 101b of the first flexible substrate 101 and the first surface 102a of the second flexible substrate 102 each comprise a protective layer (not shown).
    2. 2. As shown in Fig.2a, providing the second surface 101b of the first flexible substrate 101 and the first surface 102a of the second flexible substrate with an adhesive layer 11 therebetween so as to form a laminated structure 50.
      In step 2, as shown in Fig.2b, it's also possible to provide the adhesive layer 11 only at the peripheral areas of the second surface 101b of the first flexible substrate 101 and the first surface 102a of the second flexible substrate 102 while the central area is provided with removable spacers 400, to join the first and second flexible substrates into the laminated structure 50. The spacers 400 may be selectively in a square, circle, oval shape or other optional shapes, and the function of the spacers 400 is to separate the first and second flexible substrates from each other and support the first and second flexible substrates, so as to facilitate the film fabrication process on the flexible substrates.
      In step 2, the first and second flexible substrates may be glass substrates, and the thickness thereof may be not greater than 30µm and not less than 20µm.
      In step 2, the adhesive layer may be selected to be formed of silicane-based adhesive.
    3. 3. As shown in Figs.2c-2d, forming a first flexible display element layer 10a and a first opposite flexible substrate 301 in this order on the first outer surface 50a of the laminated structure 50, constituting a first flexible display device 70, and forming a second flexible display element layer 10b and a second opposite flexible substrate 302 in this order on the second outer surface 50b of the laminated structure 50, constituting a second flexible display device 80.
      In step 3, the flexible display element layer may be any one of an organic light emitting layer, a liquid crystal display layer, an electrophonic display layer, an electrowetting layer, an electrochromism layer, and so on; the outer surface 70a of the first flexible display device 70 and the outer surface 80b of the second flexible display device 80 may each comprise a protective layer (not shown).
      In step 3, the first flexible display device 70 and the second flexible display device 80 may also be mono-substrate devices, that is to say, do not comprise the first and second opposite flexible substrates.
    4. 4. Immersing the laminated structure into the solvent, and separating the first and second flexible display devices from each other.


    [0018] In step 4, the solvent may be selected to be tetrahydrofuran solution.

    [0019] In the method for manufacturing a flexible display device of this example, the first and second flexible substrates are joined into a laminated structure through an adhesive layer, such that the two flexible substrates are mutually supported, thereby it's possible to conveniently perform processes in subsequent process and the production efficiency is improved.

    Embodiment



    [0020] The above processes belong to specific examples not belonging to the present invention. Now an embodiment of the invention may further comprise:

    [0021] Providing a support member 100 comprising a first surface and a second surface;

    [0022] Accordingly, the above step 2 may be: as shown in Fig.3a, the first surface of the support member 100 is formed with an adhesive layer 11a thereon, the second surface of the support member 100 is formed with an adhesive layer 11b; the first flexible substrate 101 is adhered to the first surface 100a of the support member 100, and the second flexible substrate 102 is adhered to the second surface 100b of the support member 100, forming a laminated structure 60.

    [0023] In step 2, as shown in Fig.3b, it' also possible to form the adhesive layer 11a only at the peripheral area of the first surface 100a of the support member 100 while the central area is provided with removable spacers 400a, and to form the adhesive layer 11b at the peripheral area of the second surface 100b of the support member 100 while the central area is provided with removable spacers 400b; then the first flexible substrate 101 is adhered to the first surface 100a of the support member 100 and the second flexible substrate 102 is adhered to the second surface 100b of the 100, forming a laminated structure 60. The spacers 400a and 400b may be selected to be in a square, circle, or oval shape or optionally in another shape, and the function thereof is to separate the first and second flexible substrates from each other and support the first and second flexible substrates, and to facilitate the film fabrication process on the flexible substrates.

    [0024] In step 2, the adhesive layer may be selected to be formed of a silicane-based adhesive.

    [0025] The above step 4 is to immerse the laminated structure into solvent and separate the first and second flexible display devices from the support member 100.

    [0026] In step 4, the solvent may be selected to be tetrahydrofuran solution.

    [0027] In the method for manufacturing a flexible display device of this embodiment, after the first and second flexible substrates are fixed to a support member through an adhesive layer located therebetween, subsequent film fabrication processes are performed, which method is suitable for the process of various flexible substrates, such as plastic substrate, metal foil, thin glass substrate and so on, and for any purpose of achieving a good effect with a support member.

    Another Examples



    [0028] In the following examples not belonging to the invention but helping to better understand the invention, an implementation of the method for manufacturing a flexible display device is described in connection with the case where the connecting element is an adhesive layer, as an example.

    [0029] Referring to Figs.4a-4d, the method for manufacturing a flexible display device provided by this embodiment may comprise the following steps.
    1. 1. Providing a first flexible substrate 101 having a first surface and a second surface, and providing a second flexible substrate 102 having a third surface and a fourth surface.
    2. 2. As shown in Fig.4a, providing an adhesive layer 11 between the second surface 101b of the first flexible substrate 101 and the first surface 102a of the second flexible substrate so as to form a laminated structure 50.
      In step 2, as shown in Fig.4b, it's also possible to provide the adhesive layer 11 only at the peripheral areas of the second surface 101b of the first flexible substrate 101 and the first surface 102a of the second flexible substrate 102 while the central area is provided with removable spacers 400, to join the first and second flexible substrates into the laminated structure 50. The spacers 400 may be selected to be in a square, circle, or oval shape or optionally in another shape, and the function thereof is to separate the first and second flexible substrates from each other and support the first and second flexible substrates, so as to facilitate the film fabrication process on the flexible substrates.
      In step 2, as shown in Fig.4c, it's also possible to, before providing the adhesive layer 11 on the second surface 101b of the first flexible substrate and the first surface 102a of the second flexible substrate, provide buffer layers 12a and 12b respectively on the second surface 101b of the first flexible substrate 101 and the first surface 102a of the second flexible substrate 102, and the buffer layers may be selected to be SiN:H or a-Si:H layers.
      In step 2, as shown in Fig.4d, it's also possible to, before providing the adhesive layer 11 at the peripheral areas of the second surface 101b of the first flexible substrate and the first surface 102a of the second flexible substrate, provide buffer layers 12a and 12b respectively on the second surface 101b of the first flexible substrate 101 and the first surface 102a of the second flexible substrate 102, and the buffer layers may be selected to be SiN:H or a-Si:H layers.
      In step 2, the first and second flexible substrates may be selected to be glass substrates, and the thickness thereof may be not greater than 30µm and not less than 20µm.
      In step 2, the adhesive layer may be selected to be formed of an adhesive containing a polyimide component.
    3. 3. Forming a first flexible display element layer 10a and a first opposite flexible substrate 301 in this order on the first outer surface 50a of the laminated structure 50, constituting a first flexible display device 70, and forming a second flexible display element layer 10b and a second opposite flexible substrate 302 in this order on the second outer surface 50b of the laminated structure 50, constituting a second flexible display device 80.
      In step 3, the flexible display element layer may be any one of an organic light emitting layer, a liquid crystal display layer, an electrophonic display layer, an electrowetting layer, an electrochromism layer, and so on.
      In step 3, the first flexible display device 70 and the second flexible display device 80 may also be mono-substrate devices, that is to say, do not comprise the first and second opposite flexible substrates.
    4. 4. Irradiating the adhesive layer 11 or the buffer layer 12 by using a laser, and separating the first flexible display device 70 and the second flexible display device 80 from each other.


    [0030] In step 4, as shown in Fig.4a, in a manner corresponding to that in step 2 for providing the adhesive layer 11 on the second surface 101b of the first flexible substrate and the first surface 102a of the second flexible substrate 102, the adhesive layer 11 is irradiated from the upper and lower surfaces of the laminated structure, the first and second flexible display devices 70 and 80 are separated from each other, and the first and second flexible display devices 70 and 80 are transparent.

    [0031] In step 4, as shown in Fig.4b, in a manner corresponding to that in step 2 for providing the adhesive layer 11 only at the peripheral areas of the second surface 101b of the first flexible substrate 101 and the first surface 102a of the second flexible substrate 102, the adhesive layer 11 is irradiated by the laser from the sides of the laminated structure, and the first and second flexible display devices 70 and 80 are separated from each other.

    [0032] In step 4, as shown in Fig.4c, in a manner corresponding to that in step 2 used to, before providing the adhesive layer 11 on the second surface 101b of the first flexible substrate 101 and the first surface 102a of the second flexible substrate 102, provide buffer layers respectively on the second surface 101b of the first flexible substrate 101 and the first surface 102a of the second flexible substrate 102, the buffer layers 12a and 12b are irradiated from the upper and lower surfaces of the laminated structure, and the first and second flexible display devices 70 and 80 are separated from each other; and the first and second flexible display devices 70 and 80 are transparent.

    [0033] In step 4, as shown in Fig.4d, in a manner corresponding to that in step 2 used to, before providing the adhesive layer 11 at the peripheral areas of the second surface 101b of the first flexible substrate 101 and the first surface 102a of the second flexible substrate 102, provide the buffer layers respectively on the second surface 101b of the first flexible substrate and the first surface 102a of the second flexible substrate 102, the buffer layers 12a and 12b are irradiated with the laser from the sides of the laminated structure, and the first and second flexible display devices 70 and 80 are separated from each other.

    [0034] In the method for manufacturing a flexible display device of this example not belonging to the invention, the first and second flexible substrates are joined to each other through an adhesive layer, and the first and second flexible display devices are separated from each other in a laser irradiation manner, thus it's possible to process two substrates, that is, the upper one and the lower one, during part of the processes, improving production efficiency, and at the same time, it's possible to achieve cost-cutting purpose for its simple processes and easiness to implement.

    Further Embodiments



    [0035] The above processes belong to an example not belonging to the invention. Now another embodiment may further comprise: providing a support member 100 comprising a first surface and a second surface.

    [0036] Accordingly, the above step 2 may be that: as shown in Fig.5a, the first surface 100a of the support member 100 is formed with an adhesive layer 11a thereon, the second surface 100b of the support member 100 is formed with an adhesive layer 11b, and the first flexible substrate 101 is adhered to the first surface 100a of the support member 100 and adhering the second flexible substrate 102 is adhered to the second surface 100b of the support member 100, then forming a laminated structure 60.

    [0037] In step 2, as shown in Fig.5b, it' also possible to form the adhesive layer 11a only at the peripheral area of the first surface 100a of the support member 100 while the central area is provided with removable spacers 400a, and to form the adhesive layer 11b at the peripheral area of the second surface 100b of the support member 100 while the central area is provided with removable spacers 400b, then the first flexible substrate 101 is adhered to the first surface 100a of the support member 100 and the second flexible substrate 102 is adhered to the second surface 100b of the 100, forming a laminated structure 60. The spacers 400a and 400b may be selected to be in a square, circle, or oval shape or optionally in another shape, and the function thereof is to separate the first and second flexible substrates from each other and support the first and second flexible substrates, to facilitate the film fabrication process on the flexible substrates.

    [0038] In step 2, as shown in Fig.5c, it's also possible to, before forming the adhesive layer on the second surface and the second surface of the support member 100, providing the buffer layers 12a and 12b respectively on the second surface 101b of the first flexible substrate 101 and the first surface 102a of the second flexible substrate 102, and the buffer layers may be selected to be SiN:H or a-Si:H layers.

    [0039] In step 2, as shown in Fig.5d, it's also possible to, before forming the adhesive layer on the peripheral areas of second surface and the second surface of the support member 100, providing the buffer layers 12a and 12b respectively on the second surface 101b of the first flexible substrate 101 and the first surface 102a of the second flexible substrate 102, the buffer layers may be selected to be SiN:H or a-Si:H layers.

    [0040] In step, the adhesive layer may be selected to be formed of an adhesive containing a polyimide component.

    [0041] The above step 4 is: laser-irradiating the adhesive layers 11a and 11b or the buffer layers 12a and 12b, and separating the first flexible display device 70 and the second flexible display device 80 from the support member 100.

    [0042] In step 4, as shown in Fig.5a, in a manner corresponding to that in step 2 for forming the adhesive layer on the first surface 100a and the second surface 100b of the support member 100, the adhesive layers 11a and 11b are irradiated from the upper and lower surfaces of the laminated structure, the first and second flexible display devices 70 and 80 are separated from each other, and the first and second flexible display devices 70 and 80 are transparent.

    [0043] In step 4, as shown in Fig.5b, in a manner corresponding to that in step 2 for providing the adhesive layer only at the peripheral areas of the first surface 100a and the second surface 100b of the support member 100, the adhesive layers 11a and 11b are irradiated with the laser from the sides of the laminated structure, and the first and second flexible display devices 70 and 80 are separated from the support member 100.

    [0044] In step 4, as shown in Fig.5c, in a manner corresponding to that in step 2 used to, before forming the adhesive layer on the first surface and the second surface of the support member 100, provide buffer layers 12a and 12b respectively on the second surface 101b of the first flexible substrate 101 and the first surface 102a of the second flexible substrate 102, the buffer layers 12a and 12b are irradiated from the upper and lower surfaces of the laminated structure, the first and second flexible display devices 70 and 80 are separated from the support member 100, and the first and second flexible display devices 70 and 80 are transparent.

    [0045] In step 4, as shown in Fig.5d, in a manner corresponding to that in step 2 used to, before forming the adhesive layer at the peripheral areas of the first surface and the second surface of the support member 100, provide the buffer layers 12a and 12b respectively on the second surface 101b of the first flexible substrate 101 and the first surface 102a of the second flexible substrate 102, the buffer layers 12a and 12b are irradiated with the laser from the sides of the laminated structure, and the first and second flexible display devices 70 and 80 are separated from the support member 100.

    [0046] In the method for manufacturing a flexible display device of this embodiment, the first and second flexible substrates are fixed to a support member through an adhesive layer, and the first and second flexible substrates are separated from the support member in a laser-irradiating manner, the processes are easy to be implemented while improving product yields and reducing the production costs. This method is suitable for various flexible substrates, such as a plastic substrate, a metal foil, a thin glass substrate and so on, and for the purpose to achieve a good effect.

    Other examples and a further embodiment



    [0047] Firstly, another example not belonging to the invention of the method for manufacturing a flexible display device is described in which the connecting element is an adhesive layer.

    [0048] Referring to Figs.6a-6d, examples not belonging to the invention but for better understanding the method of the invention for manufacturing a flexible display device of Fig. 6e specifically comprise the following steps.
    1. 1. Providing a first flexible substrate 101 having a first surface and a second surface, and providing a second flexible substrate 102 having a third surface and a fourth surface.
    2. 2. As shown in Figs.6a-6b, the first and second flexible substrates are divided into several flexible panels 200, and each of the flexible panels 200 is provided with an adhesive layer 13 at its peripheral area while the central area thereof is provided with spacers 400, and the first and second flexible substrates are adhered to form a laminated structure 500.
      In step 2, the first and second flexible substrates may be selected to be glass substrates, and the thickness thereof may be selected to be not greater than 30µm and not less than 20µm.
    3. 3. As shown in Fig.6c, forming a first flexible display element layer 10a and a first opposite flexible substrate 301 in this order on the first outer surface 500a of the laminated structure 500, constituting several first flexible display device, and forming a second flexible display element layer 10b and a second opposite flexible substrate 302 in this order on the second outer surface 500b of the laminated structure 500, constituting several second flexible display device.
      In step 3, the flexible display element layer may be any one of an organic light emitting layer, a liquid crystal display layer, an electrophonic display layer, an electrowetting layer, an electrochromism layer, and so on.
      In step 3, the first flexible display device and the second flexible display device may also be mono-substrate devices, that is to say, do not comprise the first and second opposite flexible substrates.
    4. 4. As shown in Fig.6d, cutting lines 20 are provided inside the adhesive layer 13, and respective first and second flexible display devices that are opposite to each other are separated from each other by cutting.


    [0049] The above processes belong to an example not belonging to the invention but helping to better understand the further embodiment of the invention shown in Figure 6e . The further embodiment further to the example of Figs. 6a-6d comprises: providing a support member 100 comprising a first surface and a second surface;

    [0050] Accordingly, the above step 2 is: as shown in Fig.6e, the first and second flexible substrates are divided into several flexible panels, and each of the flexible panels 200 are provided with an adhesive layer 13 at its peripheral area while the central area thereof is provided with spacers 400, and the first and second flexible substrates are adhered to the first and second surfaces of the support member 100 to form a laminated structure 600.

    [0051] The above step 4 is: cutting lines 20 are provided inside the adhesive layer 13, and respective first and second flexible display devices that are opposite to each other are separated from the support member 100 by cutting.

    [0052] In the method for manufacturing a flexible display device of this embodiment, the first and second flexible substrates are joined into a laminated structure through an adhesive layer, and respective flexible display devices are separated from each other by cutting, thereby the processes thereof are simple and easy to implement, no damage occurs to the panels, and it's possible to manufacture several display devices simultaneously in a mass production manner and improve production efficiency. The manner of inserting a support member between two flexible substrates may widely apply to the processes of various flexible substrates and for any purpose of achieving a good effect with a support member.

    Further Example



    [0053] In this example not belonging to the invention, the method for manufacturing a flexible display device will be introduced for the case where the connecting element is a fastener as an example, which method may comprise the following steps, for example:
    1. 1. Providing a first flexible substrate having a first surface and a second surface, and providing a second flexible substrate having a third surface and a fourth surface.
    2. 2. Providing fasteners at the peripheral parts of the first and second flexible substrates to fix the first and second flexible substrates, so as to form a laminated structure.
      In step 2, the first and second flexible substrates may be selected to be glass substrates, and the thickness thereof may be selected to be not greater than 30µm and not less than 20µm.
      In step 2, the fastener may be any one of clincher, screw, notch, snap and so on.
    3. 3. forming a first flexible display element layer and a first opposite flexible substrate in this order on the first outer surface of the laminated structure, constituting the first flexible display device, and forming a second flexible display element layer and a second opposite flexible substrate in this order on the second outer surface of the laminated structure, constituting the second flexible display device.
      In step 3, the flexible display element layer may be any one of an organic light emitting layer, a liquid crystal display layer, an electrophonic display layer, an electrowetting layer, an electrochromism layer, and so on.
      In step 3, the first flexible display device and the second flexible display device may also be mono-substrate devices, that is to say, do not comprise the first and second opposite flexible substrates.
    4. 4. Removing the fasteners to separate the first and second flexible display devices from each other.


    [0054] The above processes belong to an example of one implementation provided in this example; Another embodiment may further comprise: providing a support member comprising a first surface and a second surface;

    [0055] Accordingly, the above step 2 is: providing fasteners at the peripheral part of the support member, and fixing the first and second flexible substrates onto the support member to form a laminated structure.

    [0056] In step 2, the fastener may be any one of clincher, screw, notch, snap and so on.

    [0057] The above step 4 is: removing the fasteners and separating the first and second flexible display devices from the support member.

    [0058] In the method for manufacturing a flexible display device of this embodiment, the first and second flexible substrates are joined into a laminated structure by fasteners, and the first and second flexible display devices are manufactured respectively on the first and second flexible substrates and then both of them are separated from each other by removing the fasteners, thus the technology is simple and of low cost. The manner of inserting a support member between two flexible substrates may widely apply to the processes of various flexible substrates and for any purpose of achieving a good effect with a support member.

    Another example not belonging to the invention



    [0059] The other example of the method for manufacturing a flexible display device would be introduced for the case where the connecting element is a vacuum adsorbable substrate, as an example.

    [0060] Referring to Figs.7a-7e, the method for manufacturing a flexible display device provided by this example may comprise the following steps, for example.
    1. 1. Providing a first flexible substrate 101 having a first surface and a second surface, and providing a second flexible substrate 102 having a third surface and a fourth surface.
    2. 2. As shown in Fig.7a, providing the vacuum adsorbable substrate 900 having first and second surfaces that are opposite to each other, and performing evacuating process of the vacuum adsorbable substrate to adsorb the first and second flexible substrates to the first and second surfaces of the vacuum adsorbable substrate respectively, to form a laminated structure 90;
      In step 2, as shown in Figs.7b-7e, the vacuum adsorbable substrate 900 also has four sides adjoining with the first and second surfaces thereof, and further, an interior of the vacuum adsorbable substrate have passages communicating with each other; there are openings, running into the inner passages, distributed at the first and second surfaces and at least one side of the vacuum adsorbable substrate, wherein the opening at the at least one side is used for connecting the vacuum pumping equipment.
    3. 3. As shown in Fig.7f, forming a first flexible display element layer 10a and a first opposite flexible substrate 301 in this order on the first outer surface 90a of the laminated structure 90, constituting a first flexible display device, and forming a second flexible display element layer 10b and a second opposite flexible substrate 302 in this order on the second outer surface 90b of the laminated structure 90, constituting a second flexible display device.
      In step 3, the flexible display element layer may be any one of an organic light emitting layer, a liquid crystal display layer, an electrophonic display layer, an electrowetting layer, an electrochromism layer, and so on.
      In step 3, the first flexible display device and the second flexible display device may also be mono-substrate devices, that is to say, do not comprise the first and second opposite flexible substrates.
    4. 4. Removing the vacuum pumping equipment and performing vacuum release to separate the first and second flexible display devices from the vacuum adsorbable substrate 900.


    [0061] In the method for manufacturing a flexible display device of this example, the first and second flexible substrates are joined together by a vacuum adsorbable substrate, thereby it's possible to perform processing simultaneously of two substrates, i.e., the upper and lower substrates, during part of the processes, improving the production efficiency, and the way for separation is simple and no damage occurs to the substrates, thus this method may apply for any such processes in which two or more substrates have to be again separated from each other after joining them.

    Another example not belonging to the invention



    [0062] In this another example of the method for manufacturing a flexible display device is described in which the connecting element is an adhesive layer.

    [0063] Referring to Fig.8a, the method for manufacturing a flexible display device provided by this embodiment may comprise the following steps, for example.
    1. 1. Providing a first display device comprising a first substrate, a first flexible display element layer and a first opposite flexible substrate, providing a second display device comprising a second substrate, a second flexible display element layer and a second opposite flexible substrate, wherein the upper surface of the first opposite flexible substrate is used for the first surface of the first display device, the lower surface of the first substrate is used for the second surface of the first display device, the upper surface of the second opposite flexible substrate is used for the first surface of the second display device, and the lower surface of the second substrate is used for the second surface of the second display device.
      In step 1, the flexible display element layer is any one of an organic light emitting layer, a liquid crystal display layer, an electrophonic display layer, an electrowetting layer, an electrochromism layer, and so on.
    2. 2. Joining the first surface of the first display device to the first surface of the second display device to form a laminated structure, wherein the second surface of the first display device and the second surface of the second display device are used for the first, second outer surfaces of the laminated structure, respectively.
      In step 2, the connecting element may be any one of an adhesive layer, a vacuum adsorbable substrate, a fastener or other connection.
    3. 3. Performing a thinning process on the first, second outer surfaces of the laminated structure in a manner such as, chemical etching, mechanical polishing or the combination thereof, or any other manners for thinning the glass-sheets, the thickness thereof may be selected to be not greater than 30µm.
    4. 4. Separating the first and second display devices from each other.


    [0064] In the method for manufacturing a flexible display device of this example, by forming the display devices firstly and then joining both of them for thinning, the problem that the common flexible display devices are difficult to be processed and the accuracy regulation thereof is unsatisfactory is solved, and further, by joining the two display devices for thinning to obtain flexibility, it's possible to perform thinning of two surfaces simultaneously, which further improves efficiency and reduces cost.

    [0065] The embodiments of present invention can be used to provide a flexible display device comprising the flexible display device manufactured in the method for manufacturing a flexible display device of any one of the above embodiments, the flexible display device may be a cellphone, a computer, a digital camera, electronic advertising board and so on, as well as any devices to which the flexible display device can be applied.

    [0066] The above described are solely exemplary embodiments of present invention, rather than limitation on the protective scope of present invention which is defined by the attached claims.


    Claims

    1. A method for manufacturing a flexible display device, comprising:

    providing a first flexible substrate (101) comprising a first surface and a second surface and a second flexible substrate (102) comprising a third surface and a fourth surface;

    joining the second surface of the first flexible substrate with the third surface of the second flexible substrate by a connecting element (11a, 11b) to form a laminated structure, wherein the first surface of the first flexible substrate (101) is a first outer surface of the laminated structure (60), and the fourth surface of the second flexible substrate (102) is a second outer surface of the laminated structure (60);

    forming a first display element layer (10a) and a second display element layer (10b) respectively on the first and second outer surfaces of the laminated structure (60); and

    separating the first flexible substrate (101) from the second flexible substrate (102) of the laminated structure (60), characterized by

    providing a support member (100) comprising a first surface and a second surface opposite to each other;

    joining the second surface of the first flexible substrate with the third surface of the second flexible substrate by the connecting element (11a, 11b) comprising fixing the second surface of the first flexible substrate (101) and the third surface of the second flexible substrate (102) to the first and second surfaces of the support member (100) by the connecting element (11a, 11b), respectively, so as to form the laminated structure (60), and

    the first display element layer (10a) and the second display element layer (10b) being flexible respectively.


     
    2. The manufacturing method according to claim 1, further comprising:
    forming a first opposite flexible substrate (301) and a second opposite flexible substrate (302) respectively on the first and second flexible display element layers (10a, 10b), after forming the first flexible display element layer (10a) and the second flexible display element layer (10b) respectively on the first and second outer surfaces of the laminated structure (60).
     
    3. The manufacturing method according to claim 1, wherein fixing of the second surface of the first flexible substrate (101) and the third surface of the second flexible substrate (102) respectively to the first and second surfaces of the support member (100) by a connecting element (11a, 11b) comprises:

    bonding the second surface of the first flexible substrate (101) and the third surface of the second flexible substrate (102) to the first and second surfaces of the support member (100) through an adhesive layer (11a, 11b), or

    bonding peripheral areas of the first and second flexible substrates (101, 102) with peripheral areas of the first surface and the second surface of the support member (100) through an adhesive layer (11a, 11b).


     
    4. The manufacturing method according to claim 3, wherein fixing of the second surface of the first flexible substrate (101) and the third surface (102a) of the second flexible substrate (102) respectively to the first and second surfaces of the support member (100) by a connecting element (11a, 11b) further comprises:
    providing spacers (400a, 400b) for supporting the flexible substrates (101, 102) at central areas of the first surface and the second surface of the support member (100), respectively, to separate the first and second flexible substrates (101, 102) from the support member (100).
     
    5. The manufacturing method according to claim 1, wherein the first and second flexible substrates (101, 102) are glass substrates; and joining of the second surface of the first flexible substrate (101) to the third surface of the second flexible substrate (102) by a connecting element (11a, 11b) comprises:

    bonding the second surface of the first flexible substrate (101) and the third surface of the second flexible substrate (102) through an adhesive layer (11a, 11b), or

    bonding a peripheral area of the second surface of the first flexible substrate (101) and a peripheral area of the third surface of the second flexible substrate (102) through an adhesive layer (11a, 11b).


     
    6. The manufacturing method according to claim 5, wherein the joining of the second surface of the first flexible substrate (101) and the third surface of the second flexible (102) substrate by a connecting element (11a, 11b) further comprises:
    providing spacers (400a, 400b) for supporting the flexible substrates (101, 102) at central areas of second surface of the first flexible substrate (101) and the third surface of the second flexible substrate (102), to separate the first and second flexible substrates (101, 102) from each other.
     
    7. The manufacturing method according to claim 3 or 5, wherein separating of the first flexible substrate (101) from the second flexible substrate (102) of the laminated structure (60) comprises:
    dissolving the adhesive layer (11a, 11b) using a solvent to separate the first flexible substrate (101) from the second flexible substrate (102) of the laminated structure (60).
     
    8. The manufacturing method according to claim 3 or 5, wherein the laminated structure (60) is transparent; and separating of the first flexible substrate (101) from the second flexible substrate (102) of the laminated structure (60) comprises:
    irradiating the adhesive layer (11a, 11b) from the upper and lower surfaces of the laminated structure (60) with a laser to separate the first flexible substrate (101) from the second flexible substrate (102) of the laminated structure (60).
     
    9. The manufacturing method according to claim 3 or 5, wherein separating of the first flexible substrate (101) from the second flexible substrate (102) of the laminated structure (60) comprises:
    irradiating the adhesive layer (11a, 11b) from a side of the laminated structure (60) with a laser to separate the first flexible substrate (101) from the second flexible substrate (102) of the laminated structure (60).
     
    10. The manufacturing method according to claim 3 or 5, further comprising:
    forming buffer layers (12a, 12b) on the second surface of the first flexible substrate (101) and the third surface of the second flexible substrate (102), before joining the second surface of the first flexible substrate (101) and the third surface of the second flexible substrate (102) by a connecting element (11a, 11b).
     
    11. The manufacturing method according to claim 10, wherein the laminated structure (60) is transparent; and separating of the first flexible substrate (101) from the second flexible substrate (102) of the laminated structure (60) comprises:
    irradiating the buffer layers (12a, 12b) from the upper and lower surfaces of the laminated structure (60) with a laser to separate the first flexible substrate (101) from the second flexible substrate (102) of the laminated structure (60).
     
    12. The manufacturing method according to claim 3 or 5, wherein separating of the first flexible substrate (101) from the second flexible substrate (102) of the laminated structure (60) comprises:
    providing cutting lines (20) inside of the adhesive layer (11a, 11b) and cutting along the cutting lines (20) to separate the first flexible substrate (101) from the second flexible substrate (102) of the laminated structure (60).
     
    13. The method for manufacturing according to claim 1, wherein joining of the second surface of the first flexible substrate (101) to the third surface of the second flexible substrate (102) by a connecting element (11a, 11b) comprises:
    providing fasteners at peripheral areas of the first and second flexible substrates (101, 102) and joining the first and second flexible substrates (101, 102) into a laminated structure (60).
     
    14. The manufacturing method according to claim 1, wherein fixing of the second surface of the first flexible substrate (101) and the third surface of the second flexible substrate (102) respectively to the first and second surfaces of the support member (100) by a connecting element (11a, 11b) comprises:
    providing fasteners at the peripheral areas of the first and second flexible substrates (101, 102) and joining the first and second flexible substrates (101, 102) and the support member (100) into a laminated structure (60).
     


    Ansprüche

    1. Verfahren zum Herstellen einer flexiblen Anzeigevorrichtung mit:

    Bereitstellen eines ersten flexiblen Substrats (101), das eine erste Oberfläche und eine zweite Oberfläche aufweist, und eines zweiten flexiblen Substrats (102), das eine dritte Oberfläche und eine vierte Oberfläche aufweist;

    Verbinden der zweiten Oberfläche des ersten flexiblen Substrats mit der dritten Oberfläche des zweiten flexiblen Substrats durch ein Verbindungselement (11a, 11b), um eine laminierte Struktur zu bilden, wobei die erste Oberfläche des ersten flexiblen Substrats (101) eine erste äußere Oberfläche der laminierten Struktur (60) ist und die vierte Oberfläche des zweiten flexiblen Substrats (102) eine zweite äußere Oberfläche der laminierten Struktur (60) ist;

    Bilden einer ersten Anzeigeelementschicht (10a) und einer zweiten Anzeigeelementschicht (10b), jeweils auf der ersten und der zweiten äußeren Oberfläche der laminierten Struktur (60); und

    Trennen des ersten flexiblen Substrats (101) von dem zweiten flexiblen Substrat (102) der laminierten Struktur (60), gekennzeichnet durch

    Bereitstellen eines Stützelements (100), das eine erste Oberfläche und eine zweite Oberfläche, die einander entgegengesetzt sind, aufweist;

    Verbinden der zweiten Oberfläche des ersten flexiblen Substrats mit der dritten Oberfläche des zweiten flexiblen Substrats durch das Verbindungselement (11a, 11b) mit Befestigen der zweiten Oberfläche des ersten flexiblen Substrats (101) bzw. der dritten Oberfläche des zweiten flexiblen Substrats (102) an der ersten bzw. der zweiten Oberfläche des Stützelements (100) durch das Verbindungselement (11a, 11b), um so die laminierte Struktur (60) zu bilden, und

    die erste Anzeigeelementschicht (10a) und die zweite Anzeigeelementschicht (10b), die jeweils flexibel sind.


     
    2. Herstellungsverfahren gemäß Anspruch 1 weiter mit:
    Bilden eines ersten entgegengesetzten flexiblen Substrats (301) und eines zweiten entgegengesetzten flexiblen Substrats (302) jeweils auf der ersten und der zweiten flexiblen Anzeigeelementschicht (10a, 10b), nach Bilden der ersten flexiblen AnzeigeelementSchicht (10a) bzw. der zweiten flexiblen Anzeigeelementschicht (10b) auf der ersten bzw, der zweiten äußeren Oberfläche der laminierten Struktur (60).
     
    3. Herstellungsverfahren gemäß Anspruch 1, wobei Befestigen der zweiten Oberfläche des ersten flexiblen Substrats (101) bzw. der dritten Oberfläche des zweiten flexiblen Substrats (102) an der ersten bzw. der zweiten Oberfläche des Stützelements (100) durch ein Verbindungselement (11a, 11b) aufweist:

    Bonden der zweiten Oberfläche des ersten flexiblen Substrats (101) und der dritten Oberfläche des zweiten flexiblen Substrats (102) an die erste und die zweite Oberfläche des Stützelements (100) durch eine Klebeschicht (11a, 11b), oder

    Bonden peripherer Bereiche des ersten und des zweiten flexiblen Substrats (101, 102) mit peripheren Bereichen der ersten Oberfläche und der zweiten Oberfläche des Stützelements (100) durch eine Klebeschicht (11a, 11b).


     
    4. Herstellungsverfahren gemäß Anspruch 3, wobei Befestigen der zweiten Oberfläche des ersten flexiblen Substrats (101) und der dritten Oberfläche (102a) des zweiten flexiblen Substrats (102) jeweils mit der ersten und der zweiten Oberfläche des Stützelements (100) durch ein Verbindungselement (11a, 11b) weiter aufweist:
    Bereitstellen von Abstandshaltern (400a, 400b) zum Stützen der flexiblen Substrate (101, 102) an Zentralbereichen der ersten Oberfläche bzw. der zweiten Oberfläche des Stützelements (100), um das erste und das zweite flexible Substrat (101, 102) von dem Stützelement (100) zu trennen.
     
    5. Herstellungsverfahren gemäß Anspruch 1, wobei das erste und das zweite flexible Substrat (101, 102) Glassubstrate sind; und Verbinden der zweiten Oberfläche des ersten flexiblen Substrats (101) mit der dritten Oberfläche des zweiten flexiblen Substrats (102) durch ein Verbindungselement (11a, 11b) aufweist:

    Bonden der zweiten Oberfläche des ersten flexiblen Substrats (101) und der dritten Oberfläche des zweiten flexiblen Substrats (102) durch eine Klebeschicht (11a, 11b), oder

    Bonden eines peripheren Bereichs der zweiten Oberfläche des ersten flexiblen Substrats (101) und eines peripheren Bereichs der dritten Oberfläche des zweiten flexiblen Substrats (102) durch eine Klebeschicht (11a, 11b).


     
    6. Herstellungsverfahren gemäß Anspruch 5, wobei das Verbinden der zweiten Oberfläche des ersten flexiblen Substrats (101) und der dritten Oberfläche des zweiten flexiblen Substrats (102) durch ein Verbindungselement (11a, 11b) weiter aufweist:
    Bereitstellen von Abstandshaltern (400a, 400b) zum Stützen der flexiblen Substrate (101, 102) an zentralen Bereichen der zweiten Oberfläche des ersten flexiblen Substrats (101) und der dritten Oberfläche des zweiten flexiblen Substrats (102), um das erste und das zweite flexible Substrat (101, 102) voneinander zu trennen.
     
    7. Herstellungsverfahren gemäß Anspruch 3 oder 5, wobei Trennen des ersten flexiblen Substrats (101) von dem zweiten flexiblen Substrat (102) der laminierten Struktur (60) aufweist:
    Auflösen der Klebeschicht (11a, 11b) unter Verwendung einer Lösung, um das erste flexible Substrat (101) von dem zweiten flexiblen Substrat (102) der laminierten Struktur (60) zu trennen.
     
    8. Herstellungsverfahren gemäß Anspruch 3 oder 5, wobei die laminierte Struktur (60) transparent ist; und Trennen des ersten flexiblen Substrats (101) von dem zweiten flexiblen Substrat (102) der laminierten Struktur aufweist:
    Bestrahlen der Klebeschicht (11a, 11b) von den unteren und oberen Oberflächen der laminierten Struktur (60) mit einem Laser, um das erste flexible Substrat (101) von dem zweiten flexiblen Substrat (102) der laminierten Struktur (60) zu trennen.
     
    9. Herstellungsverfahren gemäß Anspruch 3 oder 5, wobei Trennen des ersten flexiblen Substrats (101) von dem zweiten flexiblen Substrat (102) der laminierten Struktur (60) aufweist:
    Bestrahlen der Klebeschicht (11a, 11b) von einer Seite der laminierten Struktur (60) mit einem Laser, um das erste flexible Substrat (101) von dem zweiten flexiblen Substrat (102) der laminierten Struktur (60) zu trennen.
     
    10. Herstellungsverfahren gemäß Anspruch 3 oder 5, weiter mit:
    Bilden von Pufferschichten (12a, 12b) auf der zweiten Oberfläche des ersten flexiblen Substrats (101) und der dritten Oberfläche des zweiten Substrats (102) vor Verbinden der zweiten Oberfläche des ersten flexiblen Substrats (101) und der dritten Oberfläche des zweiten flexiblen Substrats (102) durch ein Verbindungselement (11a, 11b).
     
    11. Herstellungsverfahren gemäß Anspruch 10, wobei die laminierte Struktur (60) transparent ist; und Trennen des ersten flexiblen Substrats (101) von dem zweiten flexiblen Substrat (102) der laminierten Struktur (60) aufweist:
    Bestrahlen der Pufferschicht (12a, 12b) an der unteren und der oberen Oberfläche der laminierten Struktur (60) mit einem Laser, um das erste flexible Substrat (101) von dem zweiten flexiblen Substrat (102) der laminierten Struktur (60) zu trennen.
     
    12. Herstellungsverfahren gemäß Anspruch 3 oder 5, wobei Trennen des ersten flexiblen Substrats (101) von dem zweiten flexiblen Substrat (102) der laminierten Struktur (60) aufweist:
    Bereitstellen von Schneidlinien (20) innerhalb der Klebeschicht (11a, 11b) und Schneiden entlang der Schneidlinien (20), um das erste flexible Substrat (101) von dem zweiten flexiblen Substrat (102) der laminierten Struktur (60) zu trennen.
     
    13. Herstellungsverfahren gemäß Anspruch 1, wobei Verbinden der zweiten Oberfläche des ersten flexiblen Substrats (101) mit der dritten Oberfläche des zweiten flexiblen Substrats (102) durch ein Verbindungselement (11a, 11b) aufweist:
    Bereitstellen von Befestigungselementen an peripheren Bereichen des ersten oder zweiten flexiblen Substrats (101, 102) und Verbinden des ersten und des zweiten flexiblen Substrats (101, 102) in eine laminierte Struktur (60).
     
    14. Herstellungsverfahren gemäß Anspruch 1, wobei Befestigen der zweiten Oberfläche des ersten flexiblen Substrats (101) und der dritten Oberfläche des zweiten flexiblen Substrats (102) jeweils mit der ersten und der zweiten Oberfläche des Stützelements (100) durch ein Verbindungselement (11a, 11b) aufweist:
    Bereitstellen von Befestigungselementen an den peripheren Bereichen des ersten und des zweiten flexiblen Substrats (101, 102) und Verbinden des ersten und des zweiten flexiblen Substrats (101, 102) und des Stützelements (100) in eine laminierte Struktur (60).
     


    Revendications

    1. Procédé pour fabriquer un dispositif d'affichage flexible, comprenant :

    la fourniture d'un premier substrat flexible (101) qui comprend une première surface et une deuxième surface et d'un second substrat flexible (102) qui comprend une troisième surface et une quatrième surface ;

    la jonction de la deuxième surface du premier substrat flexible avec la troisième surface du second substrat flexible au moyen d'un élément de connexion (11a, 11b) de manière à former une structure empilée, dans lequel la première surface du premier substrat flexible (101) est une première surface externe de la structure empilée (60), et la quatrième surface du second substrat flexible (102) est une seconde surface externe de la structure empilée (60) ;

    la formation d'une première couche d'élément d'affichage (10a) et d'une seconde couche d'élément d'affichage (10b) respectivement sur les première et seconde surfaces externes de la structure empilée (60) ; et

    la séparation du premier substrat flexible (101) par rapport au second substrat flexible (102) de la structure empilée (60) ;

    caractérisé par :

    la fourniture d'un élément de support (100) qui comprend une première surface et une seconde surface qui sont opposées l'une à l'autre ;

    la jonction de la deuxième surface du premier substrat flexible avec la troisième surface du second substrat flexible au moyen de l'élément de connexion (11a, 11b) comprenant la fixation de la deuxième surface du premier substrat flexible (101) et de la troisième surface du second substrat flexible (102) respectivement sur les première et seconde surfaces de l'élément de support (100) au moyen de l'élément de connexion (11a, 11b) de manière à former la structure empilée (60) ; et

    la première couche d'élément d'affichage (10a) et la seconde couche d'élément d'affichage (10b) étant respectivement flexibles.


     
    2. Procédé de fabrication selon la revendication 1, comprenant en outre :
    la formation d'un premier substrat flexible opposé (301) et d'un second substrat flexible opposé (302) respectivement sur les première et seconde couches d'élément d'affichage flexibles (10a, 10b), après la formation de la première couche d'élément d'affichage flexible (10a) et de la seconde couche d'élément d'affichage flexible (10b) respectivement sur les première et seconde surfaces externes de la structure empilée (60).
     
    3. Procédé de fabrication selon la revendication 1, dans lequel la fixation de la deuxième surface du premier substrat flexible (101) et de la troisième surface du second substrat flexible (102) respectivement sur les première et seconde surfaces de l'élément de support (100) au moyen d'un élément de connexion (11a, 11b) comprend :

    la liaison de la deuxième surface du premier substrat flexible (101) et de la troisième surface du second substrat flexible (102) sur les première et seconde surfaces de l'élément de support (100) par l'intermédiaire d'une couche adhésive (11a, 11b) ; ou

    la liaison de zones périphériques des premier et second substrats flexibles (101, 102) avec des zones périphériques de la première surface et de la seconde surface de l'élément de support (100) par l'intermédiaire d'une couche adhésive (11a, 11b).


     
    4. Procédé de fabrication selon la revendication 3, dans lequel la fixation de la deuxième surface du premier substrat flexible (101) et de la troisième surface (102a) du second substrat flexible (102) respectivement sur les première et seconde surfaces de l'élément de support (100) au moyen d'un élément de connexion (11a, 11b) comprend en outre :
    la fourniture d'espaceurs (400a, 400b) pour supporter les substrats flexibles (101, 102) au niveau de zones centrales respectivement de la première surface et de la seconde surface de l'élément de support (100), de manière à séparer les premier et second substrats flexibles (101, 102) par rapport à l'élément de support (100).
     
    5. Procédé de fabrication selon la revendication 1, dans lequel les premier et second substrats flexibles (101, 102) sont des substrats en verre ; et la jonction de la deuxième surface du premier substrat flexible (101) sur la troisième surface du second substrat flexible (102) au moyen d'un élément de connexion (11a, 11b) comprend :

    la liaison de la deuxième surface du premier substrat flexible (101) et de la troisième surface du second substrat flexible (102) par l'intermédiaire d'une couche adhésive (11a, 11b) ; ou

    la liaison d'une zone périphérique de la deuxième surface du premier substrat flexible (101) et d'une zone périphérique de la troisième surface du second substrat flexible (102) par l'intermédiaire d'une couche adhésive (11a, 11b).


     
    6. Procédé de fabrication selon la revendication 5, dans lequel la jonction de la deuxième surface du premier substrat flexible (101) et de la troisième surface du second substrat flexible (102) au moyen d'un élément de connexion (11a, 11b) comprend en outre :
    la fourniture d'espaceurs (400a, 400b) pour supporter les substrats flexibles (101, 102) au niveau de zones centrales respectivement de la deuxième surface du premier substrat flexible (101) et de la troisième surface du second substrat flexible (102), de manière à séparer les premier et second substrats flexibles (101, 102) l'un de l'autre.
     
    7. Procédé de fabrication selon la revendication 3 ou 5, dans lequel la séparation du premier substrat flexible (101) par rapport au second substrat flexible (102) de la structure empilée (60) comprend :
    la dissolution de la couche adhésive (11a, 11b) en utilisant un solvant de manière à séparer le premier substrat flexible (101) par rapport au second substrat flexible (102) de la structure empilée (60).
     
    8. Procédé de fabrication selon la revendication 3 ou 5, dans lequel la structure empilée (60) est transparente ; et la séparation du premier substrat flexible (101) par rapport au second substrat flexible (102) de la structure empilée (60) comprend :
    l'irradiation de la couche adhésive (11a, 11b) depuis les surfaces supérieure et inférieure de la structure empilée (60) à l'aide d'un laser de manière à séparer le premier substrat flexible (101) par rapport au second substrat flexible (102) de la structure empilée (60).
     
    9. Procédé de fabrication selon la revendication 3 ou 5, dans lequel la séparation du premier substrat flexible (101) par rapport au second substrat flexible (102) de la structure empilée (60) comprend :
    l'irradiation de la couche adhésive (11a, 11b) depuis un côté de la structure empilée (60) à l'aide d'un laser de manière à séparer le premier substrat flexible (101) par rapport au second substrat flexible (102) de la structure empilée (60).
     
    10. Procédé de fabrication selon la revendication 3 ou 5, comprenant en outre :
    la formation de couches tampon (12a, 12b) sur la deuxième surface du premier substrat flexible (101) et sur la troisième surface du second substrat flexible (102), avant la jonction de la deuxième surface du premier substrat flexible (101) et de la troisième surface du second substrat flexible (102) au moyen d'un élément de connexion (11a, 11b).
     
    11. Procédé de fabrication selon la revendication 10, dans lequel la structure empilée (60) est transparente ; et la séparation du premier substrat flexible (101) par rapport au second substrat flexible (102) de la structure empilée (60) comprend :
    l'irradiation des couches tampon (12a, 12b) depuis les surfaces supérieure et inférieure de la structure empilée (60) à l'aide d'un laser de manière à séparer le premier substrat flexible (101) par rapport au second substrat flexible (102) de la structure empilée (60).
     
    12. Procédé de fabrication selon la revendication 3 ou 5, dans lequel la séparation du premier substrat flexible (101) par rapport au second substrat flexible (102) de la structure empilée (60) comprend :
    la formation de lignes de coupe (20) à l'intérieur de la couche adhésive (11a, 11b) et la coupe suivant les lignes de coupe (20) de manière à séparer le premier substrat flexible (101) par rapport au second substrat flexible (102) de la structure empilée (60).
     
    13. Procédé de fabrication selon la revendication 1, dans lequel la jonction de la deuxième surface du premier substrat flexible (101) sur la troisième surface du second substrat flexible (102) au moyen d'un élément de connexion (11a, 11b) comprend :
    l'apposition de moyens de fixation au niveau de zones périphériques des premier et second substrats flexibles (101, 102) et la jonction des premier et second substrats flexibles (101, 102) selon une structure empilée (60)
     
    14. Procédé de fabrication selon la revendication 1, dans lequel la fixation de la deuxième surface du premier substrat flexible (101) et de la troisième surface du second substrat flexible (102) respectivement sur les première et seconde surfaces de l'élément de support (100) au moyen d'un élément de connexion (11a, 11b) comprend :
    l'apposition de moyens de fixation au niveau des zones périphériques des premier et second substrats flexibles (101, 102) et la jonction des premier et second substrats flexibles (101, 102) et de l'élément de support (100) selon une structure empilée (60).
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description