阅读说明：本技术 一种柔性显示面板以及显示装置 (Flexible display panel and display device ) 是由 任贵宁 于 2021-08-06 设计创作，主要内容包括：本申请提供了一种柔性显示面板以及显示装置,柔性显示面板包括液晶层,设置于第一柔性基板和第二柔性基板之间,液晶包括第一液晶分子和第二液晶分子,第二液晶分子设置于第二柔性基板朝向液晶层的表面；支撑层,设置于第一配向层背向液晶层的一面,支撑层由边沿区域向中心区域倾斜；第一配向层,设置于支撑层朝向液晶层的一面,第一液晶分子设置于第一配向层表面。本申请通过设置支撑层,使得第一液晶分子和第二液晶分子之间具有不同的预倾角,从而使得在第二柔性基板和第一柔性基板进行弯曲时,补偿因第二柔性基板和第一柔性基板弯曲而导致液晶层中的液晶分子预倾角的错位的问题,提高了曲面屏的亮度均一性,从而得以提升显示效果。(The application provides a flexible display panel and a display device, wherein the flexible display panel comprises a liquid crystal layer arranged between a first flexible substrate and a second flexible substrate, the liquid crystal comprises first liquid crystal molecules and second liquid crystal molecules, and the second liquid crystal molecules are arranged on the surface, facing the liquid crystal layer, of the second flexible substrate; the supporting layer is arranged on one surface of the first alignment layer, which is opposite to the liquid crystal layer, and the supporting layer inclines from the edge area to the central area; the first alignment layer is arranged on one surface, facing the liquid crystal layer, of the supporting layer, and the first liquid crystal molecules are arranged on the surface of the first alignment layer. This application is through setting up the supporting layer for have different pretilt angles between first liquid crystal molecule and the second liquid crystal molecule, thereby make when second flexible substrate and first flexible substrate are crooked, the problem of the dislocation of the liquid crystal molecule pretilt angle in the compensation leads to the liquid crystal layer because of second flexible substrate and the bending of first flexible substrate has improved the luminance homogeneity of curved surface screen, thereby can promote display effect.)

1. A flexible display panel, comprising:

a first flexible substrate;

a second flexible substrate disposed opposite to the first flexible substrate;

the liquid crystal layer is arranged between the first flexible substrate and the second flexible substrate and comprises first liquid crystal molecules and second liquid crystal molecules, and the second liquid crystal molecules are arranged close to the second flexible substrate;

the supporting layer is arranged on one surface of the first alignment layer, which faces away from the liquid crystal layer, and the supporting layer inclines from the edge area to the central area;

the first alignment layer is arranged on one surface, facing the liquid crystal layer, of the supporting layer, and the first liquid crystal molecules are arranged on the surface of the first alignment layer.

2. The flexible display panel of claim 1, wherein the support layer is disposed in a central symmetry.

3. The flexible display panel of claim 1, wherein the support layer is made of a transparent plastic material.

4. The flexible display panel of claim 1, wherein the thickness of the support layer decreases from the edge region to the central region.

5. The flexible display panel of claim 1, wherein the thickness of the support layer gradually increases from the edge region to the central region.

6. A flexible display panel according to claim 4 or 5, wherein the thickness of the border area of the support layer is less than 2 μm and the angle between the inclined portion of the support layer and the first flexible substrate is in the range 1 ° -2 °.

7. The flexible display panel of claim 1, wherein the support layer is disposed on a light incident side of the flexible display panel.

8. The flexible display panel of claim 1, further comprising:

and the second alignment film is arranged on one surface of the second flexible substrate close to the liquid crystal layer, and the second liquid crystal molecules are arranged on the second alignment film.

9. The flexible display panel of claim 8, wherein the pretilt angle of the second liquid crystal molecules to the second flexible substrate is 90 °.

10. A display device comprising the flexible display panel according to any one of claims 1 to 9.

Technical Field

The application relates to the technical field of display devices, in particular to a flexible display panel and a display device.

Background

Compared with a flat liquid crystal display screen, the flexible large-size curved display panel has the characteristics of large bending angle, large curvature and no frame, particularly, a screen of the double-curved screen is generally designed into a concave or convex shape and can display and touch on the side surface, the design of the curved screen is advanced at present, and the curved screen has the advantages of mellow hand feeling, exquisite appearance, wide visual angle, large screen occupation ratio and the like, and can bring better visual experience to vast users. However, when the curved liquid crystal panel is bent, the liquid crystal molecules inside the curved liquid crystal panel change optical characteristics due to stress, so that the liquid crystal display screen has the problems of uneven display brightness, reduced definition and the like.

When a curved liquid crystal display panel is manufactured, a Polymer Stabilized Vertical Alignment (PSVA) process is generally used for processing a liquid crystal layer, that is, a voltage is applied to the liquid crystal layer, and ultraviolet light irradiation is performed to fix a liquid crystal molecule deflection angle of the liquid crystal layer to form a certain pretilt angle, wherein the pretilt angles obtained by the process method are the same. However, when a curved liquid crystal display panel is manufactured, an original flat panel display panel is bent, and a color film substrate and an array substrate located in upper and lower different regions are shifted relative to each other in the horizontal direction with respect to the center of the display panel, so that the display panel is bent, and liquid crystal molecules inside the display panel change optical characteristics due to stress, thereby reducing light transmittance in a part of regions, causing problems such as uneven display brightness and reduced definition of the liquid crystal display, and affecting display effects.

Disclosure of Invention

The application provides a flexible display panel and display device to solve the uneven problem of flexible display screen display brightness.

In one aspect, the present application provides a flexible display panel, comprising:

a first flexible substrate;

a second flexible substrate disposed opposite to the first flexible substrate;

the liquid crystal layer is arranged between the first flexible substrate and the second flexible substrate and comprises first liquid crystal molecules and second liquid crystal molecules, and the second liquid crystal molecules are arranged close to the second flexible substrate;

the supporting layer is arranged on one surface of the first alignment layer, which faces away from the liquid crystal layer, and the supporting layer inclines from the edge area to the central area;

the first alignment layer is arranged on one surface, facing the liquid crystal layer, of the supporting layer, and the first liquid crystal molecules are arranged on the surface of the first alignment layer.

In one possible implementation manner of the present application, the support layer is arranged in a central symmetry manner.

In one possible implementation manner of the present application, the supporting layer is made of a transparent plastic material.

In one possible implementation of the present application, the thickness of the support layer decreases gradually from the edge region to the central region.

In one possible implementation manner of the present application, the thickness of the supporting layer gradually increases from the edge area to the central area.

In one possible implementation manner of the present application, a thickness of the edge region of the supporting layer is less than 2 μm, and an included angle between the inclined portion of the supporting layer and the first flexible substrate is in a range of 1 ° to 2 °.

In one possible implementation manner of the present application, the supporting layer is disposed on a light incident side of the flexible display panel.

In one possible implementation manner of the present application, the flexible display panel further includes:

and the second alignment film is arranged on one surface of the second flexible substrate close to the liquid crystal layer, and the second liquid crystal molecules are arranged on the second alignment film.

In one possible implementation manner of the present application, the pretilt angle between the second liquid crystal molecules and the second flexible substrate is 90 °.

In another aspect, the present application further provides a display device including the flexible display panel.

According to the flexible display panel and the display device provided by the application, the supporting layer is arranged between the liquid crystal layer and the first flexible substrate, the supporting layer inclines from the edge area to the central area, the first alignment layer is arranged on the supporting layer, so that the first alignment layer also inclines from the edge area to the central area, the pretilt angle of the first liquid crystal molecules arranged on the surface of the first alignment layer is different from the pretilt angle of the second liquid crystal molecules close to the second flexible substrate, different pretilt angles are formed between the first liquid crystal molecules and the second liquid crystal molecules, and therefore when the second flexible substrate and the first flexible substrate are bent, the problem of dislocation of the pretilt angles of the liquid crystal molecules in the liquid crystal layer caused by bending of the second flexible substrate and the first flexible substrate can be compensated, and the brightness uniformity of the curved-surface screen is improved, thereby improving the display effect.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a flexible display panel according to an embodiment of the present application.

Fig. 2 is a schematic cross-sectional structure diagram of AA' in fig. 1 according to an embodiment of the present disclosure.

Fig. 3 is a schematic diagram of a bent state of the flexible display panel in fig. 2 according to an embodiment of the present disclosure.

Fig. 4 is a schematic structural diagram of a support layer provided in an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a support layer according to another embodiment of the present application.

Fig. 6 is a schematic structural diagram of a support layer according to another embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The embodiments of the present application provide a flexible display panel and a display device, which are described in detail below.

Referring to fig. 1 to 3, an embodiment of the present application provides a flexible display panel, which includes a central area and edge areas 102 located at two sides of the central area, wherein the flexible display panel is bent from the central area to the edge areas 102 at two sides.

The flexible display panel further includes a first flexible substrate 10, a second flexible substrate 20, a liquid crystal layer 30, and a support layer 40.

The first flexible Substrate 10 is a thin film transistor Array Substrate (TFT Array Substrate). The second flexible substrate 20 is a color film substrate, and the second flexible substrate 20 is arranged opposite to the first flexible substrate 10. The flexible display panel is provided with a plurality of pixel units, each pixel unit is provided with a public electrode and a pixel electrode, the pixel electrodes are arranged on one surface, facing the liquid crystal layer, of the first flexible substrate, the public electrodes are arranged on one surface, facing the liquid crystal layer, of the second flexible substrate, and the pixel electrodes and the public electrodes can be arranged in a mutually insulated mode. In this embodiment, the common electrode entirely covers the plurality of pixel units.

The liquid crystal layer 30 is disposed between the first flexible substrate 10 and the second flexible substrate 20, and the liquid crystal layer 30 includes a plurality of liquid crystal molecules and a plurality of Reactive Monomers (RMs) (not shown) formed in the liquid crystal layer 30 in a doped manner for assisting stable alignment. The liquid crystal molecules include first liquid crystal molecules 31 and second liquid crystal molecules 32. Wherein the second liquid crystal molecules 32 and the second flexible substrate 20 may be disposed perpendicular to each other.

A support layer 40 is disposed between the liquid crystal layer 30 and the first flexible substrate 10, the support layer 40 is inclined from a rim area 102 to a central area 101, the first liquid crystal molecules 31 are disposed adjacent to the support layer 40, and the second liquid crystal molecules 32 are disposed adjacent to the second flexible substrate 20. As shown in fig. 2, in the initial state, the first flexible substrate 10 is disposed in a plane, the surface of the support layer 40 is disposed in an inclined manner in the central region 101, the surface of the support layer 40 and the first flexible substrate 10 have an included angle α, the first liquid crystal molecules 31 are disposed perpendicular to the support layer 40, and the pretilt angle α of the second liquid crystal molecules 32 is 0, that is, the pretilt angle of the first liquid crystal molecules and the pretilt angle of the second liquid crystal molecules are different, because the second liquid crystal molecules 32 are close to the second flexible substrate 20.

In the flexible display panel provided by the embodiment of the present application, the support layer 40 is disposed between the liquid crystal layer 30 and the first flexible substrate 10, the support layer 40 is inclined from the edge region 102 to the central region 101, the first alignment layer 51 is disposed on the support layer 40, and the first alignment layer 51 is inclined from the edge region 102 to the central region 101. Therefore, the first alignment layer 51 is also inclined from the edge region 102 to the central region 101, so that the pretilt angle of the first liquid crystal molecules arranged on the surface of the first alignment layer 51 is different from the pretilt angle of the second liquid crystal molecules 32 close to the second flexible substrate 20, and the pretilt angles of the first liquid crystal molecules 31 and the second liquid crystal molecules 32 are different, so that when the second flexible substrate 20 and the first flexible substrate 10 are bent, the problem of misalignment of the pretilt angles of the liquid crystal molecules in the liquid crystal layer 30 caused by bending of the second flexible substrate 20 and the first flexible substrate 10 can be compensated, the brightness uniformity of the curved panel is improved, and the display effect is improved.

In some embodiments, the support layer 40 is disposed in a central symmetry. For example, as shown in fig. 4 to fig. 6, the support layer 40 may have a circular, rectangular or regular hexagonal equiaxed symmetrical shape, so that the long axes of the first liquid crystal molecules 31 are arranged in a centrosymmetric manner, thereby maintaining the uniformity of the viewing brightness of the flexible display panel at different viewing angles.

In some embodiments, the support layer 40 is made of a transparent plastic material. Illustratively, the material of the support layer 40 may be patterned by using a photolithography (photolithography) and etching process to form a plurality of partially etched regions, so that the unetched regions of the support layer 40 have a sufficient thickness, thereby simplifying the process and reducing the cost.

The photoresist can be positive photoresist or negative photoresist, the positive photoresist and the negative photoresist are designed differently, the exposed part of the positive photoresist is removed, the unexposed part of the negative photoresist is removed, and the processing is convenient.

In some embodiments, the thickness of the support layer 40 gradually decreases from the rim region 102 to the central region 101, or the thickness of the support layer 40 gradually increases from the rim region 102 to the central region. When the liquid crystal display is powered on, the central area 101 is obliquely arranged, and the electric field intensity on the surface of the central area is inconsistent with the electric field intensity on the surface of the electrode, so that electric lines of force near the central area 101 are inclined, the first liquid crystal molecules 31 can deflect around the central area 101 to different specific directions, and the display visual angle is enlarged.

In some embodiments, the thickness of the edge region 102 of the support layer 40 is less than 2 μm, the included angle between the inclined portion of the central region 101 of the support layer 40 and the first flexible substrate 10 is in the range of 1 ° to 2 °, the pretilt angle of the first liquid crystal molecule 31 is inclined by 1 ° to 2 ° more than the pretilt angle of the second liquid crystal molecule 32 with respect to the second liquid crystal molecule 32, and the thickness of the edge region 102 of the support layer 40 is controlled to be in a smaller range, so that the pretilt angle of the first liquid crystal molecule 31 is kept in a smaller angle range, so that the flexible display panel is in a dark state under the condition of no electric field applied, which is beneficial for avoiding light leakage in the dark state, and is lower in brightness in the dark state, which is beneficial for improving contrast.

In some embodiments, the flexible display panel further includes a second alignment film 52.

The initial state of the first liquid crystal molecules 31 on the first alignment layer 51 may be vertical to the surface of the first alignment layer 51, so that the first liquid crystal molecules 31 are inclined from the edge regions 102 at two sides to the central region 101, respectively, thereby facilitating to improve the visual performance of the flexible display panel.

The second alignment film 52 is disposed on a surface of the second flexible substrate 20 close to the liquid crystal layer 30. Specifically, the first alignment layer 51 and the second alignment film 52 are respectively located on the first flexible substrate 10 and the second flexible substrate 20, the first alignment layer 51 and the second alignment film 52 are oppositely disposed, and the liquid crystal layer 30 is located between the first alignment layer 51 and the second alignment film 52. The first alignment layer 51 and the second alignment layer 52 may be photo-alignment films or rubbing alignment films. Exemplarily, in the embodiment of the present application, the first alignment layer 51 and the second alignment film 52 may be made of Polyimide (PI).

In some embodiments, the support layer 40 is disposed on the light incident side of the flexible display panel, since the support layer 40 is disposed close to the first flexible substrate 10, and the first liquid crystal molecules 31 are disposed on the support layer 40, the second liquid crystal molecules 32 are disposed away from the light incident side, and the second alignment film 52 of the second liquid crystal molecules 32 is disposed on the second flexible substrate 20, therefore, the pretilt angle of the first liquid crystal molecules 31 is larger than the pretilt angle of the second liquid crystal molecules 32, that is, the first liquid crystal molecules 31 are more inclined than the second liquid crystal molecules 32, and by making the pretilt angle of the first liquid crystal molecules 31 closer to the entrance side of the flexible display panel larger than the pretilt angle of the first liquid crystal molecules 31 farther from the entrance side, so as to compensate the displacement of the pre-tilt angle of the first liquid crystal molecules 31 and the second liquid crystal molecules 32 caused by the bending of the curved panel, and improve the brightness uniformity of the curved panel.

In order to better implement the display device of the present application, the present application also provides a display device including the flexible display panel. Since the display device has the flexible display panel, all the same beneficial effects are achieved, and the description of the embodiment is omitted. The embodiment of the application is not specifically limited to the application of the display device, and the display device can be any product or part with a display function, such as a television, a notebook computer, a tablet computer, wearable display equipment (such as an intelligent bracelet, an intelligent watch and the like), a mobile phone, virtual reality equipment, augmented reality equipment, vehicle-mounted display, an advertising lamp box and the like.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In a specific implementation, each unit or structure may be implemented as an independent entity, or may be combined arbitrarily to be implemented as one or several entities, and the specific implementation of each unit or structure may refer to the foregoing method embodiment, which is not described herein again.

The flexible display panel and the display device provided by the embodiment of the present application are described in detail above, and a specific example is applied in the description to explain the principle and the implementation manner of the embodiment of the present application, and the description of the embodiment is only used to help understanding the technical solution and the core idea of the embodiment of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.