WO2020019338A1

WO2020019338A1 - Display panel, manufacturing method therefor, and display device

Info

Publication number: WO2020019338A1
Application number: PCT/CN2018/097638
Authority: WO
Inventors: 刘亮; 张琨
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2018-07-27
Filing date: 2018-07-27
Publication date: 2020-01-30
Also published as: CN112513960A

Abstract

Provided in the present invention is a manufacturing method for a display panel, comprising: forming an organic electroluminescent device on one side of a flexible substrate in a first area, and providing a support film on the other side of the flexible substrate away from the organic electroluminescent device, wherein the support film covers the first area and a second area and comprises a base film and an adhesive layer stacked on top of each other, and the adhesive layer is an adhesive having reduced viscosity; forming a functional element at a side of the flexible substrate in the second area; performing a viscosity reduction processing on the adhesive layer of the support film in the first area, such that the viscosity of the adhesive layer of the support film in the first area is reduced; peeling off at least the support film in the first area that has undergone the viscosity reduction processing. Also provided in the present invention are a display panel and a display device. The adhesive layer in the support film of the present invention uses an adhesive having reduced viscosity, and further performs a viscosity reduction processing thereon, such that the support film can be easily peeled off, making the finally resultant display panel more lightweight and thinner.

Description

Display panel, preparation method thereof and display device

Technical field

The present invention belongs to the field of display technology, and particularly relates to a display panel, a method for manufacturing the same, and a display device.

Background technique

Organic electroluminescence display is a display made of organic electroluminescent diodes, which has high contrast, thin thickness, wide viewing angle, fast response speed, can be used for flexible panels, wide temperature range, structure and manufacturing process. Simple and excellent features. Especially, it has the flexibility to facilitate the application in flexible panels. In a flexible panel, an organic electroluminescence device is usually disposed on a flexible substrate attached to a support film. However, the weight and thickness of the display panel with this structure are not ideal, which is not conducive to portability and convenience, and affects the bending performance of the flexible panel.

Summary of the Invention

In view of this, the present invention provides a manufacturing method for making a display panel lighter and thinner. Specific technical solutions are described below.

A method for manufacturing a display panel. The display panel includes a flexible substrate. The flexible substrate includes a first region and a second region. The method for manufacturing a display panel includes:

An organic electroluminescence device is formed on one side of the first region in the flexible substrate, and a support film is disposed on the other side of the flexible substrate away from the organic electroluminescence device, and the support film covers the In the first region and the second region, the support film includes a base film and an adhesive layer that are disposed in a stack, and the adhesive layer is disposed adjacent to the flexible substrate compared to the base film, and the adhesive Adhesive layer is viscosity reducing adhesive;

Forming a functional element in the second region in the flexible substrate;

Subjecting the adhesive layer in the support film in at least a first region to a viscosity reduction treatment, so that the adhesiveness of the adhesive layer in the support film in at least a first region is reduced;

The support film is peeled off in at least a first region after the viscosity reduction treatment.

Preferably, the method for preparing the display panel further includes:

The flexible substrate in the second region is bent toward the flexible substrate in the first region, so that the flexible substrate in the second region and the flexible substrate in the first region are bonded together.

Preferably, the “removing the adhesive layer in at least the first region to reduce the adhesion of the adhesive layer in the support film in at least the first region reduces the adhesion; The peeling of the supporting film in at least the first region after the treatment "includes:

The adhesive layer in the support film in the first region and the second region is subjected to a viscosity reduction treatment, so that the adhesive layer in the support film in the first region and the second region is reduced. Reduced adhesion

Then, the support films of the first region and the second region after the viscosity reduction treatment are peeled off.

Isolating the support film in the second region from the support film in the first region;

Subjecting the adhesive layer in the support film in the first region to a viscosity reduction treatment to reduce the adhesiveness of the adhesive layer in the support film in the first region;

Then, the support film in the first region after the viscosity reduction treatment is peeled off, and the support film in the second region is retained.

Preferably, when the adhesive layer is a UV-viscous adhesive or a UV-splitting adhesive, the manner of separating the support film in the second region from the support film in the first region includes isolating the second region. The support film in is separated from the support film in the first region by an ultraviolet baffle; when the adhesive layer is a high-temperature cracking adhesive, the supporting film in the second region is separated from the first region The manner of isolating the support film in the method includes separating the support film in the second region from the support film in the first region by a heat shield.

Preferably, the viscosity reduction treatment includes applying a viscosity reduction condition to the adhesive layer to provide energy to the adhesive layer, causing the adhesiveness of the adhesive layer to adhere to the flexible substrate to decrease; The viscosity reduction conditions include at least one of ultraviolet light irradiation, infrared light irradiation, laser irradiation, application of an electric field, application of a force field, application of a magnetic field, low temperature, and heating.

Preferably, when the viscosity reduction condition is ultraviolet light irradiation, the viscosity reduction processing method includes:

Placing an ultraviolet light device on a side of the support film remote from the flexible substrate;

Ultraviolet light in the ultraviolet light device is irradiated onto the support film in at least a first region, and passes through the base film in the support film in at least a first region to act on the adhesive layer until the The adhesion of the adhesive layer is reduced to a preset value.

Preferably, in the “forming a functional element in the second region in the flexible substrate” and the “removing the adhesive layer in the support film of at least the first region, the adhesive layer is processed so that At least the first region of the support film of the adhesive film having reduced adhesiveness further includes:

Forming a polarizer on a side of the organic electroluminescent device remote from the flexible substrate;

Forming a touch electrode layer on a side of the polarizer far from the organic electroluminescent device;

A cover layer is formed on a side of the touch electrode layer remote from the polarizer.

Preferably, the method for preparing the display panel further includes:

After the support film is peeled off in at least the first region, a functional layer is formed on a side of the flexible substrate in the first region remote from the organic electroluminescent device, and the functional layer is used for heat dissipation or electromagnetic shielding.

Preferably, the method for preparing the display panel further includes:

The flexible substrate in the second region is bent toward the functional layer in the first region, so that the flexible substrate in the second region is bonded to the functional layer.

Preferably, the functional element includes a flip-chip film adhered to the flexible substrate of the second region.

The present invention also provides a display panel, which includes:

A flexible substrate including a first region and a second region;

An organic electroluminescence device, which is disposed on one side of the first region of the flexible substrate;

A functional element provided in the second region of the flexible substrate, the functional element and the organic electroluminescent device being provided on the same side of the flexible substrate; and at most of the second region A support film is provided on a surface of the flexible substrate remote from the functional element.

Preferably, the display panel further includes:

A polarizer disposed on a side of the organic electroluminescent device away from the flexible substrate;

A touch electrode layer disposed on a side of the polarizer away from the organic electroluminescent device;

A cover layer disposed on a side of the touch electrode layer away from the polarizer.

Preferably, the flexible substrate in the second region is bent toward the flexible substrate in the first region, so that the flexible substrate in the second region is located on the flexible substrate in the first region. A side far from the organic electroluminescent device, so that the functional element is located on a surface of the flexible substrate in the second region away from the flexible substrate in the first region.

Preferably, when a supporting film is provided on a surface of the flexible substrate in the second region far from the functional element, the flexible substrate in the first region is away from the organic electroluminescence. One side of the device; the flexible substrate in the second region is located on a surface of the support film remote from the flexible substrate in the first region.

Preferably, the display panel further includes:

A functional layer, which is disposed on a side of the first region of the flexible substrate away from the organic electroluminescent device, and is used for heat dissipation or electromagnetic shielding.

Preferably, the flexible substrate in the second region is bent toward the flexible substrate in the first region, so that the flexible substrate in the second region is located in the functional layer away from the first region. One side of the flexible substrate, so that the functional element is located on a surface of the flexible substrate in the second region far from the functional layer.

The present invention provides a display device including the display panel according to any one of the above.

Beneficial effects of the present invention: In the method for preparing a display panel provided by the present invention, the adhesive layer in the supporting film is made of a viscosity-reducing adhesive, and then the viscosity-reducing adhesive is subjected to a viscosity-reducing treatment, so that the supporting film is easily peeled off, and then the final The resulting display panel is thinner and lighter.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. Those skilled in the art can also obtain other drawings according to these drawings without paying creative labor.

FIG. 1 is a schematic structural diagram of a display panel according to a first embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a display panel according to a first embodiment of the present invention.

FIG. 3 is a schematic structural diagram of another display panel according to a first embodiment of the present invention.

FIG. 4 is a schematic structural diagram of a display panel according to a second embodiment of the present invention.

FIG. 5 is a schematic structural diagram of a display panel according to a third embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a display panel according to a fourth embodiment of the present invention.

FIG. 7 is a schematic structural diagram of a display panel according to a fifth embodiment of the present invention.

FIG. 8 is a schematic structural diagram of a display panel according to a sixth embodiment of the present invention.

FIG. 9 is a schematic structural diagram of a display device provided by the present invention.

FIG. 10 is a schematic structural diagram of a display device having a supporting film.

FIG. 11 is a schematic structural diagram of another display device provided by the present invention.

FIG. 12 is a schematic structural diagram of still another display device provided by the present invention.

FIG. 13 is a flowchart of a method for manufacturing a display panel according to the present invention.

FIG. 14 is a schematic diagram before and after the support film is peeled off in a method for manufacturing a display panel provided by the present invention.

FIG. 15 is a flowchart of a UV light reduction processing method provided by the present invention.

FIG. 16 is a schematic diagram of a method for reducing viscosity of a support film in a first region by a method for reducing viscosity of ultraviolet light provided by the present invention.

FIG. 17 is a schematic diagram of a method for reducing the viscosity of a support film in a first region and a second region by a UV light reducing method provided by the present invention.

detailed description

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The terms "first", "second", and the like in the description and claims of the present invention and the drawings are used to distinguish different objects and are not used to describe a specific order. Furthermore, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device containing a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes Other steps or units inherent to these processes, methods, products or equipment.

Reference to "an embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they independent or alternative embodiments that are mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

Referring to FIG. 1, a first embodiment of the present invention provides a display panel 10. The display panel 10 includes a flexible substrate 100, an organic electroluminescent device 200, and a functional element 300. The flexible substrate 100 includes a first region 110 and a second region 120. . The organic electroluminescent device 200 is disposed on one side of the first region 110 of the flexible substrate 100. The functional element 300 is disposed on one side of the second region 120 of the flexible substrate 100, and the functional element 300 and the organic electroluminescent device 200 are disposed on the same side of the flexible substrate 100. A support film 400 is provided on a surface of the flexible substrate 100 away from the functional element 300 at most in the second region 120. It includes two cases. In the first case, the support film 400 is not provided on the surfaces of the flexible substrate 100 of the first region 110 and the second region 120 away from the functional element 300 (see FIG. 2). In the second case, a support film 400 is provided only on the surface of the flexible substrate 100 in the second region 120 that is far from the functional element 300 (see FIG. 3). In any case, compared to the past, where the support film 400 is attached to the surface of the flexible substrate 100 away from the organic electroluminescent device 200 in the prior art, the display panel 10 provided by the present invention is thinner, more portable, and more convenient. And it is beneficial to improve the bending performance of the flexible panel.

It can be understood that the flexible substrate 100 without the first region 110 of the support film 400 can be used for attaching a heat dissipation function layer or an electromagnetic shielding function layer. It can also be understood that the functional element 300 can be connected to the flexible substrate 100 of the second region 120 and partially disposed, and another portion extends outside the second region 120. It can be understood that the supporting film 400 preferably has a viscosity-reducing adhesive. During the preparation process, the supporting film 400 can be used as a supporting function. After the manufacturing process is completed, the supporting film 400 is peeled off through a viscosity-reduction treatment.

In a further embodiment, the functional element 300 includes a flip-chip film adhered to the flexible substrate 100 of the second region 120.

Referring to FIG. 4, a second embodiment of the present invention provides a display panel 10 a. The display panel 10 a further includes a polarizer 500, a touch electrode layer 600, and a cover layer 700. The polarizer 500 is disposed on the organic electroluminescent device 200 away from the flexibility. One side of the substrate 100. The polarizer 500 is used to filter the light emitted from the organic electroluminescent device 200 to form polarized light. The touch electrode layer 600 is disposed on a side of the polarizer 500 away from the organic electroluminescent device 200. The touch electrode layer 600 is used to make the display panel 10 have a touch function. The cover layer 700 is disposed on a side of the touch electrode layer 600 away from the polarizer 500. The cover layer 700 is used to protect each film layer and the light emitting device. The polarizer 500, the touch electrode layer 600, and the cover layer 700 are all disposed in the first region 110 corresponding to the flexible substrate 100.

Referring to FIG. 5, a third embodiment of the present invention provides a display panel 10b. In the display panel 10b, the flexible substrate 100 in the second region 120 is bent toward the flexible substrate 100 in the first region, so that the The flexible substrate 100 is located on a side of the flexible substrate 100 away from the organic electroluminescent device 200 in the first region 110, so that the functional element 300 is located on the surface of the flexible substrate 100 in the second region 120 away from the flexible substrate 100 of the first region 110. Bending the flexible substrate 100 of the second region 120 and the functional element 300 provided on the surface thereof toward the flexible substrate 100 of the first region 100 so that it is folded under the flexible substrate 100 of the first region 100 is beneficial to improving the display screen. Proportion. When the flexible substrate 100 of the first region 110 and the second region 120 is not provided with the supporting film 400, the flexible substrate 100 of the second region 120 and the flexible substrate 100 of the first region 110 are bonded together after being bent. The “fitting” means that the upper and lower film layers are closely arranged without gaps, or the gaps with a preset width are closely arranged.

It can be understood that when the flexible substrate 100 in the second region 120 is bent toward the flexible substrate 100 in the first region 110, a bending portion 130 is formed between the two, that is, after the bending, the bending portion 130 is connected The flexible substrate 100 in two regions, an upper first region 110 and a lower second region 120.

Referring to FIG. 6, a fourth embodiment of the present invention provides a display panel 10c. In the display panel 10c, when the flexible substrate 100 of the second region 120 is located away from the functional element 300, a support film 400 is provided (see FIG. 3) ), After the flexible substrate 100 in the second region 120 is bent toward the flexible substrate 100 in the first region, the supporting film 400 is located on a side of the flexible substrate 100 in the first region away from the organic electroluminescent device 200, The flexible substrate 100 is located on a surface of the support film 400 away from the flexible substrate 100 in the first region 110. At this time, the supporting film 400 is adhered to the flexible substrate 100 of the first region 110. Similarly, when the flexible substrate 100 in the second region 120 is bent toward the flexible substrate 100 in the first region 110, a bent portion 130 is formed between the two. It can be understood that the supporting film 400 is disposed on the bent portion 130. One side.

Referring to FIG. 7, a fifth embodiment of the present invention provides a display panel 10 d. In the display panel 10 d, the display panel 10 d further includes a functional layer 800. The functional layer 800 is disposed in the first region 110 of the flexible substrate 100 away from the first region 110. One side of the electroluminescent device 200. The functional layer 800 is used for heat dissipation or electromagnetic shielding. It can be understood that the functional layer 800 may be copper foil, graphite, foam, or tape, and preferably includes at least one of a graphene ink layer, a metal ink layer, or a nano-silver functional layer.

Referring to FIG. 8, a sixth embodiment of the present invention provides a display panel 10 e. In the display panel 10 e, the flexible substrate 100 in the second region 120 is bent toward the flexible substrate 100 in the first region 110 to make the second region 120. The flexible substrate 100 is located on a side of the functional layer 800 away from the flexible substrate 100 in the first region 110, so that the functional element 300 is located on the surface of the flexible substrate 100 in the second region 120 away from the functional layer 800. When the flexible substrate 100 of the first region 110 and the second region 120 are not provided with the supporting film 400, the flexible substrate 100 of the second region 120 and the functional layer 800 are adhered after being bent, which is beneficial to the functional element 300 during work. Performs heat dissipation. When the supporting film 400 is provided on the flexible substrate 100 in the second region 120, after the flexible substrate 100 in the second region 120 is bent toward the flexible substrate 100 in the first region, the supporting film 400 is located in the functional layer 800 away from the flexibility of the first region. On one side of the substrate 100, the flexible substrate 100 in the second region 120 is located on a surface of the support film 400 away from the functional layer 800. At this time, the support film 400 is bonded to the functional layer 800.

Referring to FIG. 9, the present invention further provides a display device 20. The display device 20 includes the display panel 10 according to any one of the above embodiments. The display device 20 may be, but is not limited to, an e-book, a smart phone (such as an Android phone, an iOS phone, a Windows Phone phone, etc.), a tablet computer, a flexible palmtop computer, a flexible notebook computer, a mobile Internet device (MID, Mobile Internet Device), or Wearable devices and the like may be organic light-emitting diode (OLED) display devices, active matrix organic light emitting diode (AMOLED) display devices.

In the following, the display panel 10 without the supporting film 400 in the second embodiment is taken as an example to describe the beneficial effects of the display panel 10 of the present invention applied to the display device 20, but this is not necessarily the case.

Please refer to FIG. 10 and FIG. 11, the display device 20 includes a protective case 21 and a display panel 10 accommodated in the protective case 21. In FIG. 10, a supporting film 400 is provided under the flexible substrate 100, and the supporting film 400 covers The entire flexible substrate 100. FIG. 11 is a display panel 10 without a supporting film 400 according to the present invention. Comparing FIG. 10 and FIG. 11, the thickness of the display device 20 in FIG. 11 is lower than that of the display device in FIG. 10. 400 while reducing weight.

Please refer to FIG. 11 and FIG. 12, the display device 20 includes a display area 22 and a non-display area 23. The display area 22 refers to an area that emits light after the display device 20 is activated, and specifically refers to an area corresponding to the organic electroluminescent device 200. The display area 23 refers to an area other than the display area 22, and a device (not shown) including a camera, a power source, and a power start key is provided in the non-display area 23. Comparing FIG. 11 and FIG. 12, FIG. 12 is a state where the flexible substrate 100 is folded. The area ratio of the display area 22 in FIG. 12 to the entire display device 20 is compared to the display area 22 in FIG. 11. The area ratio of the device 20 is larger.

13 and FIG. 14, the present invention provides a method for manufacturing a display panel 10. The display panel 10 includes a flexible substrate 100. The flexible substrate 100 includes a first region 110 and a second region 120. The method for preparing the display panel 10 includes steps. S100, step S200, step S300, and step S400. Each step is described in detail below.

In step S100, an organic electroluminescent device 200 is formed on one side of the first region 110 in the flexible substrate 100, and a supporting film 400 is provided on the other side of the flexible substrate 100 away from the organic electroluminescent device 200. The supporting film 400 covers the first In the region 110 and the second region 120, the supporting film 400 includes a base film 410 and an adhesive layer 420 disposed in a stack. The adhesive layer 420 is disposed adjacent to the flexible substrate 100 compared to the base film 410, and the adhesive layer 420 is for reducing viscosity gum. Because the flexible substrate 100 has relatively soft properties, it is unstable when other film layers or devices are attached to the surface, and the supporting film 400 is used to support the flexible substrate 100 so that the manufacturing process can be performed smoothly. Among them, the viscosity-reducing adhesive means that after the viscosity-reducing treatment, the viscosity is reduced, and it is easy to peel off.

In step S200, a functional element 300 is formed in the second region 120 in the flexible substrate 100. It can be understood that the functional element 300 and the organic electroluminescent device 200 are formed on the same side of the flexible substrate 100. With the supporting effect of the supporting film 400, the functional element 300 is formed on the flexible substrate 100 more smoothly.

In step S300, the adhesive layer 420 in the support film 400 in at least the first region 110 is subjected to a viscosity reduction treatment, so that the adhesiveness of the adhesive layer 420 in the support film 400 in at least the first region 110 is reduced.

In a further embodiment, the viscosity reduction process includes applying a viscosity reduction condition to the adhesive layer 420 to provide energy to the adhesive layer 420 to cause the adhesive layer 420 to adhere to the cohesiveness of the flexible substrate 100. decline. The viscosity reduction conditions include at least one of ultraviolet light irradiation, infrared light irradiation, laser irradiation, applied electric field, applied force field, applied magnetic field, low temperature, and heating. When applying the viscosity reduction condition, the adhesive layer 420 is placed in a light field (such as ultraviolet / infrared light / laser irradiation), and the adhesive layer 420 absorbs a certain amount of energy, causing the adhesive layer 420 to be attached to a flexible substrate. The adhesiveness on 100 is reduced; or the adhesive layer 420 is placed in an electric field (current and voltage are applied and electricity generates heat), and the adhesive layer 420 absorbs a certain amount of energy, causing the adhesive layer 420 to adhere to the flexible substrate 100 The adhesiveness on the surface is reduced; or the adhesive layer 420 is placed in a magnetic field (applying a magnetic field to convert the magnetic field into an electric field, and the electric field generates heat), the adhesive layer 420 absorbs a certain amount of energy, causing the adhesive layer 420 to adhere. The adhesion on the flexible substrate 100 is reduced; or the force field, for example, the adhesive layer 420 is made of a viscous piezoelectric material. When a force is applied to the piezoelectric material, the piezoelectric material will generate The voltage is equivalent to applying an electric field to the adhesive layer 420, and the adhesive layer 420 absorbs a certain amount of energy, which causes the adhesiveness of the adhesive layer 420 to adhere to the flexible substrate 100 to decrease; or, 420 is heated, the adhesive layer 420 absorbs a certain amount of energy, causing the adhesive layer 420 to adhere to 100 decreased adhesion on the substrates. Preferably, the viscosity reducing adhesive includes at least one of a UV viscosity reducing adhesive, a UV cracking adhesive, and a low temperature or high temperature cracking adhesive. Ultraviolet visbreaking adhesives and UV lysing adhesives are glues with reduced adhesion under ultraviolet light irradiation. High-temperature lysing adhesives are glues with reduced adhesion after being heated at high temperature. Low-temperature lysing adhesives are after being exposed to low temperature environment. Degraded adhesive.

In step S400, the support film 400 of at least the first region 110 after the viscosity reduction process is peeled off. After the support film 400 is peeled off, the weight and thickness of the display panel 10 are reduced, so that the display panel 10 is thinner and more easily bent. In addition, since the flexible substrate 100 is soft and very thin, if the support film 400 is directly peeled off, the flexible substrate 100 is easily damaged. In the embodiment of the present invention, the support film 400 is peeled off after being subjected to a viscosity reduction treatment. Compared with a method of directly peeling the support film 400 without performing a viscosity reduction treatment, it is more beneficial to protect the integrity of the flexible substrate 100 without damaging the flexible substrate. 100.

In a further embodiment, the method for manufacturing the display panel 10 further includes step S500.

In step S500, the flexible substrate 100 in the second region 120 is bent toward the flexible substrate 100 in the first region 110, so that the flexible substrate 100 in the second region 120 and the flexible substrate 100 in the first region 110 are bonded (see FIGS. 5 and 5). 6). After the bending, the functional element 300 formed on the flexible substrate 100 in the second region 120 is bent to the bottom of the flexible substrate 100 in the first region 110, so that the organic electroluminescent device 200 for light-emitting display occupies an area of the display panel 10 Increase the ratio and increase the display ratio.

In a further embodiment, “the adhesive layer 420 in the support film 400 of at least the first region 110 is subjected to a tack-reducing process, so that the adhesion of the adhesive layer 420 in the support film 400 of at least the first region 110 is adhered. Degradation; peeling off the support film 400 of at least the first region 110 after the viscosity reduction treatment includes steps S300-I and S400-I. The details are as follows.

In step S300-I, the adhesive layer 420 in the support film 400 in the first region 110 and the second region 120 is subjected to a viscosity reduction treatment, so that the adhesion in the support film 400 in the first region 110 and the second region 120 is performed. The adhesiveness of the adhesive layer 420 is reduced.

In step S400-I, the support film 400 of the first region 110 and the second region 120 after the viscosity reduction treatment is peeled.

That is, in this embodiment, the entire support film 400 is completely peeled off, making the display panel 10 thinner and lighter. It is easier for the flexible substrate 100 of the second region 110 to bend toward the flexible substrate 100 of the first region 110, and it is thinner and lighter after bending.

In a further embodiment, “the adhesive layer 420 in the support film 400 of at least the first region 110 is subjected to a tack-reducing process, so that the adhesion of the adhesive layer 420 in the support film 400 of at least the first region 110 is adhered. Degradation; peeling off the supporting film 400 of at least the first region 110 portion after the viscosity reduction treatment "includes steps S300a-II, steps S300-II, and step S400-II. The details are as follows.

In steps S300a-II, the support film 400 in the second region 120 is isolated from the support film 400 in the first region 110. Specifically, different isolation methods are adopted according to different viscosity reduction processing methods. For example, when the adhesive layer 420 is a UV-viscous adhesive or a UV-splitting adhesive, the manner of separating the support film 400 in the second region 120 from the support film 400 in the first region 110 includes isolating the second region 120 The support film 400 in is separated from the support film 400 in the first region 110 by an ultraviolet baffle to shield the support film 400 in the second region 120 from light. When the adhesive layer 420 is a high-temperature cracking adhesive, The method for isolating the support film 400 in the second region 120 from the support film 400 in the first region 110 includes passing the support film 400 in the second region 120 and the support film 400 in the first region 110 through a heat insulation plate. Separate to prevent the support film 400 in the second region 120 from being heated.

In step S300-II, the adhesive layer 420 in the support film 400 in the first region 110 is subjected to a viscosity reduction treatment, so that the adhesiveness of the adhesive layer 420 in the support film 400 in the first region 110 is reduced.

In step S400-II, the supporting film 400 in the first region 110 after the viscosity reduction treatment is peeled off, and the supporting film 400 in the second region 120 is retained. Since the flexible substrate 100 of the second region 120 is relatively thin, and the functional element 300 is attached to the surface thereof, it is easy to cause damage during subsequent bending. Therefore, in this embodiment, the support film 400 in the second region 120 is retained. In order to protect the flexible substrate 100 in the second region 120 from being damaged.

Referring to FIG. 15, in a further embodiment, when the viscosity reduction condition is ultraviolet light irradiation, the viscosity reduction processing method includes steps S310 and S320. The details are as follows.

In step S310, the ultraviolet light device 900 is disposed on a side of the support film 400 away from the flexible substrate 100.

In step S320, the ultraviolet light in the ultraviolet light device 900 is irradiated onto the support film 400 in at least the first region 110 and passes through the base film 410 in the support film 400 in at least the first region 110 to act on the adhesive layer 420 until The adhesiveness of the adhesive layer 420 is reduced to a preset value.

It can be understood that it includes a support film 400 (see FIG. 16) that irradiates the ultraviolet light in the ultraviolet light device 900 only to the first region 110, and shields the support film 400 in the second region 120 with an ultraviolet-resistant baffle 1000. . And a support film 400 (see FIG. 17) that irradiates the ultraviolet light in the ultraviolet light device 900 with the first region 110 and the second region 120.

In a further embodiment, “the formation of the functional element 300 in the second region 120 in the flexible substrate 100” and “the adhesive layer 420 in the support film 400 of at least the first region 110 are subjected to a tack-reducing process so that at least the first Step S200a, step S200b, and step S200c are further included between the "decreased adhesion of the adhesive layer 420 in the support film 400 of a region 110". The details are as follows.

In step S200a, a polarizer 500 is formed on a side of the organic electroluminescent device 200 away from the flexible substrate 100. The polarizer 500 is used to filter the light emitted from the organic electroluminescent device 200 to form polarized light.

In step S200b, a touch electrode layer 600 is formed on a side of the polarizer 500 away from the organic electroluminescent device 300. The touch electrode layer 600 is used to make the display panel 10 have a touch function.

In step S200c, a cover layer 700 is formed on a side of the touch electrode layer 600 away from the polarizer 500. The cover layer 700 is used to protect each film layer and the light emitting device.

The polarizing film 500, the touch electrode layer 600, and the cover layer 700 are sequentially formed on the organic electroluminescent device 200 before the support film 400 is reduced to make the side of the flexible substrate 100 of the first region 110 thick, and then A viscosity reduction treatment and a peeling step are performed. A thick film layer is provided on one side of the flexible substrate 100 in the first region 110. The supporting film 400 is not easy to damage the flexible substrate 100 in the first region 110 due to peeling and pulling during the peeling process.

In a further embodiment, the method for manufacturing the display panel 10 further includes forming a function on a side of the flexible substrate 100 away from the organic electroluminescent device 200 in the first region 110 after the support film 400 of at least the first region 110 is peeled off. The layer 800 and the functional layer 800 are used for heat dissipation or electromagnetic shielding (see FIG. 7). It can be understood that the functional layer 800 may be copper foil, graphite, foam, or tape, and preferably includes at least one of a graphene ink layer, a metal ink layer, or a nano-silver functional layer.

In a further embodiment, the method for manufacturing the display panel 10 further includes bending the flexible substrate 100 in the second region 120 toward the functional layer 800 in the first region 110, so that the flexible substrate 100 and the functional layer in the second region 120 are bent. 800 fit (see Figure 8). After the bending, the functional element 300 is located below the functional layer 800, and the functional layer 800 can perform heat dissipation when the functional element 300 works.

The above-mentioned embodiments only express several implementation manners of the present invention, and their descriptions are more specific and detailed, but they cannot be understood as limiting the scope of the patent of the present invention. It should be noted that, for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent shall be subject to the appended claims.

Claims

A method for manufacturing a display panel, wherein the display panel includes a flexible substrate, the flexible substrate includes a first region and a second region, and a method for preparing the display panel includes:

An organic electroluminescence device is formed on one side of the first region in the flexible substrate, and a support film is disposed on the other side of the flexible substrate away from the organic electroluminescence device, and the support film covers the In the first region and the second region, the support film includes a base film and an adhesive layer that are disposed in a stack, and the adhesive layer is disposed adjacent to the flexible substrate compared to the base film, and the adhesive Adhesive layer is viscosity reducing adhesive;

Forming a functional element in the second region in the flexible substrate;

Subjecting the adhesive layer in the support film in at least a first region to a viscosity reduction treatment, so that the adhesiveness of the adhesive layer in the support film in at least a first region is reduced;

The support film is peeled off in at least a first region after the viscosity reduction treatment.
The method for manufacturing a display panel according to claim 1, wherein the method for manufacturing a display panel further comprises:

The flexible substrate in the second region is bent toward the flexible substrate in the first region, so that the flexible substrate in the second region and the flexible substrate in the first region are bonded together.
The method for manufacturing a display panel according to claim 1 or 2, wherein, "the adhesive layer of at least a first region is subjected to a viscosity reduction treatment so that the supporting film of at least the first region is in the supporting film. The reduction of the adhesion of the adhesive layer; peeling off the support film of at least the first region after the viscosity reduction treatment includes:

The adhesive layer in the support film in the first region and the second region is subjected to a viscosity reduction treatment, so that the adhesive layer in the support film in the first region and the second region is reduced. Reduced adhesion

Then, the support films of the first region and the second region after the viscosity reduction treatment are peeled off.
The method for manufacturing a display panel according to claim 1 or 2, wherein, "the adhesive layer of at least a first region is subjected to a viscosity reduction treatment so that the supporting film of at least the first region is in the supporting film. The reduction of the adhesion of the adhesive layer; peeling off the support film of at least the first region after the viscosity reduction treatment includes:

Isolating the support film in the second region from the support film in the first region;

Subjecting the adhesive layer in the support film in the first region to a viscosity reduction treatment to reduce the adhesiveness of the adhesive layer in the support film in the first region;

Then, the support film in the first region after the viscosity reduction treatment is peeled off, and the support film in the second region is retained.
The method for manufacturing a display panel according to claim 4, wherein when the adhesive layer is an ultraviolet visbreaking adhesive or an ultraviolet cracking adhesive, the supporting film in the second region and the first region are in the first region. The method of isolating the support film includes separating the support film in the second region from the support film in the first region by an ultraviolet baffle; when the adhesive layer is a high-temperature cracking adhesive, the A manner of separating the support film in the second region from the support film in the first region includes separating the support film in the second region from the support film in the first region through a heat insulation plate. open.
The method for manufacturing a display panel according to claim 1, wherein the viscosity reduction treatment includes applying a viscosity reduction condition to the adhesive layer to provide energy to the adhesive layer, so that the adhesive layer The adhesion to the flexible substrate is reduced; the viscosity reduction conditions include at least one of ultraviolet light irradiation, infrared light irradiation, laser irradiation, applied electric field, applied force field, applied magnetic field, low temperature, and heating.
The method for manufacturing a display panel according to claim 6, wherein when the condition for reducing viscosity is irradiation with ultraviolet light, the method for reducing viscosity includes:

Placing an ultraviolet light device on a side of the support film remote from the flexible substrate;

Ultraviolet light in the ultraviolet light device is irradiated onto the support film in at least a first region, and passes through the base film in the support film in at least a first region to act on the adhesive layer until the The adhesion of the adhesive layer is reduced to a preset value.
The method for manufacturing a display panel according to claim 1, wherein the “forming a functional element in the second region in the flexible substrate” and the “forming the support film in at least the first region” The step of reducing the adhesion of the adhesive layer in the method to reduce the adhesiveness of the adhesive layer in the support film in at least the first region further includes:

Forming a polarizer on a side of the organic electroluminescent device remote from the flexible substrate;

Forming a touch electrode layer on a side of the polarizer far from the organic electroluminescent device;

A cover layer is formed on a side of the touch electrode layer remote from the polarizer.
The method for manufacturing a display panel according to claim 1, wherein the method for manufacturing a display panel further comprises:

After the support film is peeled off in at least the first region, a functional layer is formed on a side of the flexible substrate in the first region remote from the organic electroluminescent device, and the functional layer is used for heat dissipation or electromagnetic shielding.
The method of manufacturing a display panel according to claim 9, wherein the method of manufacturing the display panel further comprises:

The flexible substrate in the second region is bent toward the functional layer in the first region, so that the flexible substrate in the second region is bonded to the functional layer.
The method for manufacturing a display panel according to claim 1, wherein the functional element comprises a flip-chip film adhered to the flexible substrate of the second region.
A display panel is characterized in that the display panel includes:

A flexible substrate including a first region and a second region;

An organic electroluminescence device, which is disposed on one side of the first region of the flexible substrate;

A functional element provided in the second region of the flexible substrate, the functional element and the organic electroluminescent device being provided on the same side of the flexible substrate; and at most of the second region A support film is provided on a surface of the flexible substrate remote from the functional element.
The display panel according to claim 12, wherein the display panel further comprises:

A polarizer disposed on a side of the organic electroluminescent device away from the flexible substrate;

A touch electrode layer disposed on a side of the polarizer away from the organic electroluminescent device;

A cover layer disposed on a side of the touch electrode layer away from the polarizer.
The display panel according to claim 12, wherein the flexible substrate in the second region is bent toward the flexible substrate in the first region to make the flexible substrate in the second region One side of the flexible substrate located in the first region away from the organic electroluminescent device, so that the functional element located in the second region away from the flexible substrate in the first region on the surface.
The display panel according to claim 14, wherein, when a supporting film is provided on a surface of the flexible substrate in the second region remote from the functional element, the supporting film is located in the first region. The flexible substrate is at a side remote from the organic electroluminescent device; the flexible substrate in the second region is located on a surface of the support film remote from the flexible substrate in the first region.
The display panel according to claim 12, wherein the display panel further comprises:

A functional layer, which is disposed on a side of the first region of the flexible substrate away from the organic electroluminescent device, and is used for heat dissipation or electromagnetic shielding.
The display panel according to claim 16, wherein the flexible substrate in the second region is bent toward the flexible substrate in the first region, so that the flexible substrate in the second region The functional layer is located on a side of the flexible substrate away from the first region, so that the functional element is located on a surface of the flexible substrate in the second region away from the functional layer.
The display panel according to claim 12, wherein the functional element comprises a flip-chip film adhered to the flexible substrate of the second region.
A display device, wherein the display device comprises the display panel according to any one of claims 12-18.