Flexible OLED display panel, manufacturing method, and terminal device

Abstract

The present application provides a flexible OLED display panel, a manufacturing method, and a terminal device. The flexible OLED display panel has a bending zone. The flexible OLED display panel includes a substrate, a light-emitting device layer, an electrodeformable layer, and an encapsulation layer. The light-emitting device layer is disposed on the substrate. The electrodeformable layer is disposed on the light-emitting device layer and is located in the bending zone. The encapsulation layer is disposed on the electrodeformable layer and the light-emitting device layer. When the flexible OLED display panel is bent, the electrodeformable layer can be energized to produce tensile deformation and be elastic, thereby alleviating the bending stress of the light-emitting device layer and the encapsulation layer, avoiding the encapsulation layer located in the bending zone from breaking, and further preventing water and oxygen from invading the light-emitting device layer. When the flexible OLED display panel is unfolded, the electrodeformable layer can be powered off and restored to its original state, thereby making the encapsulation layer in the bending zone flat.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a flexible OLED display panel, a manufacturing method, and a terminal device. Background Art

[0002] OLEDs have the advantages of simple preparation process, low cost, high luminous efficiency, easy formation of flexible structure, low power consumption, high color saturation and wide viewing angle. Display technology using OLEDs has become an important display technology.

[0003] OLED is a current-type light-emitting device, which mainly includes an anode, a cathode and an organic material functional layer. The main working principle of OLED is that the organic material functional layer emits light through carrier injection and recombination under the drive of the electric field formed by the anode and the cathode.

[0004] In recent years, foldable display screens, namely flexible OLED display panels, have gradually come into the public eye. However, due to existing design reasons, flexible OLED display panels are prone to unevenness in the bending area after unfolding, and the encapsulation layer in the bending area is prone to breakage during use, resulting in water and oxygen intrusion into the display area and shortening the life of the light-emitting device. Summary of the invention

[0005] The present application provides a flexible OLED display panel and a manufacturing method and a terminal device to solve the problem that the flexible OLED display panel in the prior art is prone to unevenness of the bending area after unfolding and the encapsulation layer of the bending area is broken.

[0006] In a first aspect, the present application provides a flexible OLED display panel, comprising:

[0007] substrate;

[0008] a light emitting device layer, wherein the light emitting device layer is disposed on the substrate;

[0009] An electrodeformable layer, the electrodeformable layer is disposed on the light-emitting device layer and is located in the bending region;

[0010] The encapsulation layer is disposed on the electrostrictive layer and the light-emitting device layer.

[0011] In some possible implementations, the light-emitting device layer has a display area and a non-display area surrounding the display area, the display area has a first sub-bending area, the non-display area has two second sub-bending areas located on both sides of the first sub-bending area, and the bending area includes the first sub-bending area and the two second sub-bending areas;

[0012] The electrodeformable layer is located in the first sub-bending region.

[0013] In some possible implementations, the flexible OLED display panel further includes a power supply component and a pressure sensor located in the bending area, and the pressure sensor and the electrodeformable layer are both electrically connected to the power supply component.

[0014] In some possible implementations, the number of the pressure sensors is two, and the two pressure sensors are respectively located in two of the second sub-bending regions.

[0015] In some possible implementations, the pressure sensor and the electrodeformable layer are disposed in the same layer.

[0016] In a second aspect, the present application also provides a terminal device, comprising the above-mentioned flexible OLED display panel.

[0017] In a third aspect, the present application further provides a method for manufacturing a flexible OLED display panel, comprising:

[0018] Providing a substrate, manufacturing a light-emitting device layer on the substrate, wherein the light-emitting device layer has a bending region;

[0019] Fabricating an electrodeformable layer on the light-emitting device layer, wherein the electrodeformable layer is located in the bending region;

[0020] A packaging layer is manufactured on the electrostrictive layer and the light-emitting device layer.

[0021] In some possible implementations, the light-emitting device layer has a display area and a non-display area surrounding the display area, the display area has a first sub-bending area, the non-display area has two second sub-bending areas located on both sides of the first sub-bending area, and the bending area includes the first sub-bending area and the two second sub-bending areas;

[0022] The electrodeformable layer is located in the first sub-bending region.

[0023] In some possible implementations, after manufacturing the light-emitting device layer on the substrate, the manufacturing method further includes:

[0024] A pressure sensor is manufactured on the light emitting device layer, and the pressure sensor is located in the bending area.

[0025] In some possible implementations, the number of the pressure sensors is two, and the two pressure sensors are respectively located in two of the second sub-bending regions.

[0026] The flexible OLED display panel provided in the present application has a bending area. The flexible OLED display panel includes a substrate, a light-emitting device layer, an electrodeformable layer and an encapsulation layer. The light-emitting device layer is arranged on the substrate. The electrodeformable layer is arranged on the light-emitting device layer and is located in the bending area. The encapsulation layer is arranged on the electrodeformable layer and the light-emitting device layer. When the flexible OLED display panel is bent, the electrodeformable layer can be energized to produce tensile deformation and be elastic, thereby alleviating the bending stress of the light-emitting device layer and the encapsulation layer, avoiding the encapsulation layer located in the bending area from breaking, and further preventing water and oxygen from invading the light-emitting device layer. When the flexible OLED display panel is unfolded, the electrodeformable layer can be powered off and restored to its original state, thereby making the encapsulation layer in the bending area flat. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 is a schematic diagram of a flexible OLED display panel provided in one embodiment of the present application;

[0029] Figure 2 is a cross-sectional schematic diagram of a flexible OLED display panel provided in one embodiment of the present application;

[0030] Figure 3 is a flow chart of a method for manufacturing a flexible OLED display panel provided in one embodiment of the present application;

[0031] Figure 4 It is a schematic diagram of a method for manufacturing a flexible OLED display panel provided in one embodiment of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments discussed-and / or settings. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0037] See also Figure 1 and Figure 2 The embodiment of the present application provides a flexible OLED display panel having a bending area 100. The flexible OLED display panel includes:

[0038] Substrate 1;

[0039] A light emitting device layer 2, wherein the light emitting device layer 2 is disposed on the substrate 1;

[0040] The electrodeformable layer 3 is disposed on the light emitting device layer 2 and is located in the bending region 100;

[0041] The encapsulation layer 4 is arranged on the electrodeformable layer 3 and the light-emitting device layer 2 .

[0042] It should be noted that the bending area 100 of the flexible OLED display panel refers to the area where the flexible OLED display panel can be bent, and the substrate 1, the light-emitting device layer 2 and the encapsulation layer 4 all have a bending area 100. The electrodeformable layer 3 is located between the light-emitting device layer 2 and the encapsulation layer 4, and is located in the bending area 100, that is, from a vertical direction, the electrodeformable layer 3 is located in the bending area 100 of the light-emitting device layer 2 and the encapsulation layer 4, and the orthographic projection of the electrodeformable layer 3 on the light-emitting device layer 2 and the encapsulation layer 4 is located in the bending area 100 of the light-emitting device layer 2 and the encapsulation layer 4. When the flexible OLED display panel is bent, the bending area 100 of the light-emitting device layer 2 and the encapsulation layer 4 will be deformed. At this time, the electrodeformable layer 3 can be energized to produce tensile deformation and be elastic, thereby alleviating the bending stress of the light-emitting device layer 2 and the encapsulation layer 4, avoiding the encapsulation layer 4 located in the bending area 100 from breaking, and then preventing water and oxygen from invading the light-emitting device layer 2. When the flexible OLED display panel is unfolded, that is, becomes flat, the electrodeformable layer 3 can be powered off and restored to its original state, so that the encapsulation layer 4 in the bending area 100 becomes flat.

[0043] The embodiments of the present application do not impose any specific restrictions on the applicability of the flexible OLED display panel, which can be any product or component with a display function, such as a television, a laptop computer, a tablet computer, a wearable display device (such as a smart bracelet, a smart watch, etc.), a mobile phone, a virtual reality device, an augmented reality device, a car display, an advertising light box, etc.

[0044] In some embodiments, the material of the electrodeformable layer 3 may be an electroactive polymer. Electroactive polymers can change shape or volume under external electrical stimulation (i.e., when voltage is applied), while maintaining stable deformation; when the external voltage disappears, they can return to their original shape and volume. Electroactive polymer materials have the advantages of light weight, low price, easy processing and molding, etc., which are conducive to reducing the overall weight of the flexible OLED display panel, and are conducive to reducing the difficulty of preparation and material costs.

[0045] Exemplarily, the electroactive polymer includes an electrostrictive grafted elastomer. The electrostrictive grafted elastomer is composed of a flexible main chain and a branch chain, and the branch chain is physically cross-linked with the adjacent main chain to form a crystal unit. The main chain and the branch chain are synthesized by polar monomers with a charge, which can generate a dipole moment to induce polarization of the crystalline branch chain. When an electric field is applied (i.e., a voltage is applied), the dipole generates a torque to stimulate the rotation of the polarized unit of Zhilian, the main chain is locally rearranged, and the electrostrictive grafted elastomer is deformed.

[0046] Of course, the electrodeformable layer 3 may also be made of other materials, such as shape memory alloy, and this application does not limit this.

[0047] In this embodiment, the electrostrictive layer 3 may be a transparent electrostrictive layer to avoid affecting the display effect.

[0048] In other embodiments, the electrodeformable layer 3 may not be disposed between the light-emitting device layer 2 and the encapsulation layer 4, but may be disposed between the substrate 1 and the light-emitting device layer 2 and located in the bending region 100, and can also relieve the bending stress of the light-emitting device layer 2 and the encapsulation layer 4 when the flexible OLED display panel is bent. In addition, since the electrodeformable layer 3 is disposed between the substrate 1 and the light-emitting device layer 2, which is equivalent to being located on the back side of the light-emitting device layer 2, the electrodeformable layer 3 may also be an opaque electrodeformable layer 3.

[0049] In some embodiments, the light emitting device layer 2 includes a TFT (Thin Film Transistor) array substrate disposed on the substrate 1 , and a plurality of OLEDs disposed on the TFT array substrate.

[0050] The TFT array substrate includes an active layer, a first metal layer, a second metal layer, and an interlayer dielectric layer formed therebetween. The first metal layer may include a gate electrode, and the second metal layer may include a source electrode and a drain electrode connected to the gate electrode.

[0051] Each OLED includes an anode, a cathode and an organic material functional layer. The anode is connected to the drain. The organic material functional layer includes a hole injection layer, a hole transport layer, a light emitting layer and an electron transport layer stacked in sequence in a direction away from the TFT array substrate.

[0052] In some embodiments, the material of the substrate 1 may be polyimide (PI) or polyethylene terephthalate (PET). Of course, the substrate 1 may also be made of other materials, which is not limited in the present application.

[0053] In some embodiments, the encapsulation layer 4 is a thin film encapsulation layer. The encapsulation layer 4 may include a first inorganic barrier layer, an organic buffer layer, and a second inorganic barrier layer stacked in layers. The first inorganic barrier layer and the second inorganic barrier layer block water vapor, and the organic buffer layer relieves the bending stress of the first inorganic barrier layer and the second inorganic barrier layer, further preventing the encapsulation layer 4 from breaking when bent.

[0054] In some embodiments, see Figure 1 and Figure 2 , the light-emitting device layer 2 has a display area 21 and a non-display area 22 surrounding the display area 21, the display area 21 has a first sub-bending area 211, the non-display area 22 has two second sub-bending areas 221 located on both sides of the first sub-bending area 211, and the bending area 100 includes the first sub-bending area 211 and the two second sub-bending areas 221. The electrodeformable layer 3 is located in the first sub-bending area 211. That is, the bending area 100 of the light-emitting device layer 2 includes a part of the display area 21 and a part of the non-display area 22, and the electrodeformable layer 3 is located in the first sub-bending area 211, which is equivalent to the electrodeformable layer 3 being located directly above the display area 21, so as to ensure that the electrodeformable layer 3 can relieve the bending stress of the display area 21 of the light-emitting device layer 2, avoid the light-emitting device layer 2 from breaking, and also ensure that the electrodeformable layer 3 relieves the bending stress of the area corresponding to the encapsulation layer 4 and the display area 21, avoids the encapsulation layer 4 from breaking, and prevents water and oxygen from invading the light-emitting device layer 2.

[0055] In this embodiment, the bending area 100 of the light-emitting device layer 2 can also include the entire display area 21, that is, any position of the display area 21 of the light-emitting device layer 2 can be bent, and the area of ​​the electrodeformable layer 3 can be increased so that the electrodeformable layer 3 covers the entire display area 21, so that when any position of the display area 21 is bent, the electrodeformable layer 3 can relieve the bending stress of the light-emitting device layer 2 and the encapsulation layer 4.

[0056] In this example, see Figure 1 and Figure 2The flexible OLED display panel also includes a power supply component 5 and a pressure sensor 6 located in the bending area 100. The pressure sensor 6 and the electrodeformable layer 3 are both electrically connected to the power supply component 5. When the flexible OLED display panel is bent, the pressure sensor 6 will be subjected to extrusion pressure, and the greater the bending degree of the flexible OLED display panel, the greater the pressure on the pressure sensor 6. The pressure sensor 6 can convert the pressure received into an electrical signal and send it to the power supply component 5. The electrical signal will change with the change of the pressure received by the pressure sensor 6. Therefore, when the electrical signal is greater than the preset electrical signal threshold, it indicates that the pressure on the pressure sensor 6 is relatively large, and the bending degree of the flexible OLED display panel is relatively large. The power supply component 5 can supply power to the electrodeformable layer 3, so that the electrodeformable layer 3 is tensilely deformed and elastic, thereby alleviating the bending stress of the light-emitting device layer 2 and the encapsulation layer 4.

[0057] When the flexible OLED display panel is unfolded, the pressure sensor 6 will not be subjected to pressure or the pressure subjected to pressure is very small, so that the electrical signal is less than the preset electrical signal threshold, and the power supply component 5 can cut off the power to the electrodeformable layer 3, so that the electrodeformable layer 3 returns to its original state, thereby making the encapsulation layer 4 of the bending area 100 flat. That is, the present application can ensure that the electrodeformable layer 3 is powered when the flexible OLED display panel is bent, and the electrodeformable layer 3 is powered off when the flexible OLED display panel is unfolded, through the pressure sensor 6.

[0058] In this embodiment, the power supply component 5 may include a power supply and a power management system connected to the power supply, and the power supply and power-off of the electrodeformable layer 3 are realized through the power management system.

[0059] In this example, see Figure 1 and Figure 2 , the number of pressure sensors 6 is two, and the two pressure sensors 6 are respectively located in the two second sub-bending areas 221. That is, the two pressure sensors 6 are located in the non-display area 22 to avoid affecting the display effect. And the two pressure sensors 6 are arranged in the two second sub-bending areas 221, which is equivalent to the two pressure sensors 6 being arranged on both sides of the display area 21 and close to the edge of the flexible OLED display panel, so as to accurately sense the bending degree of the flexible OLED display panel.

[0060] In this embodiment, the pressure sensor 6 and the electrodeformable layer 3 are arranged in the same layer, that is, the pressure sensor 6 is also located on the light-emitting device layer 2, so as to avoid the pressure sensor 6 affecting the arrangement of other film layers, and at the same time it is also conducive to the thinness of the flexible OLED display panel.

[0061] Based on the above-mentioned flexible OLED display panel, an embodiment of the present application further provides a terminal device, comprising the above-mentioned flexible OLED display panel.

[0062] The terminal device can be a television, laptop, tablet computer, wearable display device (such as smart bracelet, smart watch, etc.), mobile phone, virtual reality device, augmented reality device, car display, advertising light box, and any other product or component with display function.

[0063] See also Figures 1 to 4 Based on the above-mentioned flexible OLED display panel, the embodiment of the present application further provides a method for manufacturing a flexible OLED display panel, including:

[0064] Step S1, providing a substrate 1, and manufacturing a light-emitting device layer 2 on the substrate 1, wherein the light-emitting device layer 2 has a bending region 100;

[0065] Step S2, forming an electrodeformable layer 3 on the light-emitting device layer 2, wherein the electrodeformable layer 3 is located in the bending region 100;

[0066] Step S3 , manufacturing a packaging layer 4 on the electrodeformable layer 3 and the light-emitting device layer 2 .

[0067] It should be noted that the substrate 1, the light-emitting device layer 2 and the encapsulation layer 4 all have a bending area 100, that is, the flexible OLED display panel has a bending area 100. The electrodeformable layer 3 is located between the light-emitting device layer 2 and the encapsulation layer 4, and is located in the bending area 100, that is, from a vertical direction, the electrodeformable layer 3 is located in the bending area 100 of the light-emitting device layer 2 and the encapsulation layer 4, and the orthographic projection of the electrodeformable layer 3 on the light-emitting device layer 2 and the encapsulation layer 4 is located in the bending area 100 of the light-emitting device layer 2 and the encapsulation layer 4. When the flexible OLED display panel is bent, the bending area 100 of the light-emitting device layer 2 and the encapsulation layer 4 will be deformed. At this time, the electrodeformable layer 3 can be energized to produce tensile deformation and be elastic, thereby alleviating the bending stress of the light-emitting device layer 2 and the encapsulation layer 4, avoiding the encapsulation layer 4 located in the bending area 100 from breaking, and further preventing water and oxygen from invading the light-emitting device layer 2. When the flexible OLED display panel is unfolded, that is, becomes flat, the electrodeformable layer 3 can be powered off and restored to its original state, so that the encapsulation layer 4 in the bending area 100 becomes flat.

[0068] In some embodiments, see Figure 1, the light-emitting device layer 2 has a display area 21 and a non-display area 22 surrounding the display area 21, the display area 21 has a first sub-bending area 211, the non-display area 22 has two second sub-bending areas 221 located on both sides of the first sub-bending area 211, and the bending area 100 includes the first sub-bending area 211 and the two second sub-bending areas 221. The electrodeformable layer 3 is located in the first sub-bending area 211. That is, the bending area 100 of the light-emitting device layer 2 includes a part of the display area 21 and a part of the non-display area 22, and the electrodeformable layer 3 is located in the first sub-bending area 211, which is equivalent to the electrodeformable layer 3 being located directly above the display area 21, so as to ensure that the electrodeformable layer 3 can relieve the bending stress of the display area 21 of the light-emitting device layer 2, avoid the light-emitting device layer 2 from breaking, and also ensure that the electrodeformable layer 3 relieves the bending stress of the area corresponding to the encapsulation layer 4 and the display area 21, avoids the encapsulation layer 4 from breaking, and prevents water and oxygen from invading the light-emitting device layer 2.

[0069] In this example, see Figure 1 and Figure 4 , after the light-emitting device layer 2 is manufactured on the substrate 1 in step S2, the manufacturing method of the flexible OLED display panel further includes: manufacturing a pressure sensor 6 on the light-emitting device layer 2, and the pressure sensor 6 is located in the bending area 100. The pressure sensor 6 and the electrodeformable layer 3 are both electrically connected to the power supply component 5. When the flexible OLED display panel is bent, the pressure sensor 6 will be subjected to the pressure of squeezing, and the greater the bending degree of the flexible OLED display panel, the greater the pressure on the pressure sensor 6. The pressure sensor 6 can convert the pressure received into an electrical signal and send it to the power supply component 5. The electrical signal will change with the change of the pressure received by the pressure sensor 6. Therefore, when the electrical signal is greater than the preset electrical signal threshold, it indicates that the pressure on the pressure sensor 6 is large, the bending degree of the flexible OLED display panel is large, and the power supply component 5 can supply power to the electrodeformable layer 3, so that the electrodeformable layer 3 is tensilely deformed and elastic, thereby alleviating the bending stress of the light-emitting device layer 2 and the encapsulation layer 4.

[0070] When the flexible OLED display panel is unfolded, the pressure sensor 6 will not be subjected to pressure or the pressure subjected to pressure is very small, so that the electrical signal is less than the preset electrical signal threshold, and the power supply component 5 can cut off the power to the electrodeformable layer 3, so that the electrodeformable layer 3 returns to its original state, thereby making the encapsulation layer 4 of the bending area 100 flat. That is, the present application can ensure that the electrodeformable layer 3 is powered when the flexible OLED display panel is bent, and the electrodeformable layer 3 is powered off when the flexible OLED display panel is unfolded, through the pressure sensor 6.

[0071] In this example, see Figure 1 and Figure 4, the number of pressure sensors 6 is two, and the two pressure sensors 6 are respectively located in the two second sub-bending areas 221. That is, the two pressure sensors 6 are located in the non-display area 22 to avoid affecting the display effect. And the two pressure sensors 6 are arranged in the two second sub-bending areas 221, which is equivalent to the two pressure sensors 6 being arranged on both sides of the display area 21 and close to the edge of the flexible OLED display panel, so as to accurately sense the bending degree of the flexible OLED display panel.

[0072] In some embodiments, in step S2, the electrodeformable layer 3 may be made on the light emitting device layer 2 by inkjet printing. Of course, the electrodeformable layer 3 may also be made by other methods, which are not limited in the present application.

[0073] In the above embodiments, the description of each embodiment has its own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. In specific implementation, the above units or structures can be implemented as independent entities, or can be arbitrarily combined and implemented as the same or several entities. The specific implementation of the above units or structures can refer to the previous method embodiments, which will not be repeated here.

[0074] The above is a detailed introduction to a flexible OLED display panel, a manufacturing method, and a terminal device provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the embodiments of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the embodiments of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A flexible OLED display panel having a bending area, characterized in that: include: substrate; a light emitting device layer, wherein the light emitting device layer is disposed on the substrate; An electrodeformable layer, the electrodeformable layer is disposed on the light-emitting device layer and is located in the bending region; An encapsulation layer, the encapsulation layer being disposed on the electrostrictive layer and the light-emitting device layer; Among them, the flexible OLED display panel also includes a power supply component and a pressure sensor located in the bending area, the pressure sensor and the electrodeformable layer are electrically connected to the power supply component, and the pressure sensor and the electrodeformable layer are arranged in the same layer; the electrodeformable layer is configured to generate tensile deformation when energized to relieve the bending stress of the light-emitting device layer and the packaging layer.

2. The flexible OLED display panel according to claim 1, characterized in that: The light emitting device layer comprises a display area and a non-display area surrounding the display area, the display area comprises a first sub-bending area, the non-display area comprises two second sub-bending areas located on both sides of the first sub-bending area, and the bending area comprises the first sub-bending area and the two second sub-bending areas; The electrodeformable layer is located in the first sub-bending region.

3. The flexible OLED display panel according to claim 2, characterized in that: The number of the pressure sensors is two, and the two pressure sensors are respectively located in two of the second sub-bending regions.

4. A terminal device, characterized in that: include: The flexible OLED display panel according to any one of claims 1 to 3.

5. A method for manufacturing a flexible OLED display panel, characterized in that: A method for preparing a flexible OLED display panel as claimed in any one of claims 1 to 3, wherein the method comprises: Providing a substrate, manufacturing a light-emitting device layer on the substrate, wherein the light-emitting device layer has a bending region; Fabricating an electrodeformable layer on the light-emitting device layer, wherein the electrodeformable layer is located in the bending region; Fabricating an encapsulation layer on the electrostrictive layer and the light-emitting device layer; Wherein, after manufacturing the light-emitting device layer on the substrate, the manufacturing method further comprises: manufacturing a pressure sensor on the light-emitting device layer, wherein the pressure sensor is located in the bending region.

6. The method for manufacturing a flexible OLED display panel according to claim 5, characterized in that: The light emitting device layer comprises a display area and a non-display area surrounding the display area, the display area comprises a first sub-bending area, the non-display area comprises two second sub-bending areas located on both sides of the first sub-bending area, and the bending area comprises the first sub-bending area and the two second sub-bending areas; The electrodeformable layer is located in the first sub-bending region.

7. The method for manufacturing a flexible OLED display panel according to claim 6, characterized in that: The number of the pressure sensors is two, and the two pressure sensors are respectively located in two of the second sub-bending regions.

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