CN111968526A - Flexible display panel and display device - Google Patents

Abstract

The present application discloses a flexible display panel and a display device, which relate to the field of display technology, including: a bending area and a flat area; the bending area further includes a first area and a second area; The folding area includes a pixel light-emitting layer, an optical path conversion layer, and at least one first light path conversion part and/or at least one second light path conversion part. At least one of the optical path conversion part and the second optical path conversion part is located in the optical path conversion layer, and the orthographic projection of the first optical path conversion part on the plane where the plane area is located is located within the orthographic projection range of the first area on the plane where the plane area is located; the second optical path conversion part The orthographic projection on the plane where the plane area is located is located within the orthographic projection range of the second area on the plane where the plane area is located. The present application is provided with a first optical path conversion part and a second optical path conversion part, which can effectively improve the light intensity of the bending area and make the display brightness of the bending area and the flat area uniform.

Description

Flexible display panel and display device

technical field

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

Background technique

OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) has become one of the most competitive technologies in the new generation of display devices due to its wide color gamut, high contrast ratio, energy saving and foldable advantages, especially OLED display. The foldable feature of the screen is favored and loved by people, and its application fields are wide, such as smart wearable devices, in-vehicle devices and smart home appliances.

At present, in a flexible display device, a part of the flexible display panel needs to be bent to form a bending area, and the bending area is formed so that when the display panel is in an unfolded state, on the one hand, the light-emitting surface of the display panel in the bending area is The distance from the user of the device is farther than the distance between the light-emitting surface of the display panel in the flat area and the user of the device; on the other hand, there will be a blind area in some areas of the display panel in the bending area, which makes the brightness of the flat area and the bending area Non-uniformity affects the display effect of the display panel.

SUMMARY OF THE INVENTION

In view of this, the present application provides a flexible display panel and a display device, according to the size of the radius of curvature of the bending area, and according to the size of the vertical distance between the bending area and the plane where the display panel plane area is located, the bending area is divided into first. The first area and the second area respectively improve the problem of uneven brightness of the display panel in the first area and the second area, thereby realizing the display brightness uniformity of the display panel.

In order to solve the above-mentioned technical problems, the application has the following technical solutions:

In a first aspect, the present application provides a flexible display panel, comprising: a bending area and a planar area at least partially adjacent to the bending area;

The bending region further includes a first region and at least one second region adjacent to the first region;

Along the direction perpendicular to the plane where the plane area is located, the bending area includes a pixel light-emitting layer, an optical path conversion layer, and at least one first light path conversion part and/or at least one second light path conversion part, and the light path conversion layer is located in the pixel light-emitting layer close to the plane One side of the plane where the area is located, at least one of the first optical path conversion part and the second optical path conversion part is located in the optical path conversion layer, and the orthographic projection of the first optical path conversion part on the plane where the plane area is located is located on the plane where the first area is located. The orthographic projection range of the second optical path conversion part on the plane where the plane area is located is located within the orthographic projection range of the second area on the plane where the plane area is located;

In the first area, at least part of the light emitted by the pixel light-emitting layer is collected by the first light path conversion part and then exits to the light-emitting surface of the display panel; in the second area, at least part of the light emitted by the pixel light-emitting layer is deflected by the second light path conversion part. out to the light-emitting surface of the display panel.

In a second aspect, the present application further provides a display device including a flexible display panel, where the flexible display panel is the flexible display panel provided by the present application.

Compared with the prior art, the flexible display panel and the display device provided by the present invention at least achieve the following beneficial effects:

In the flexible display panel and display device provided by the present application, the bending area is divided into a first area and a second area according to the size of the radius of curvature of the bending area and the vertical distance between the bending area and the plane where the flat area of the display panel is located. Two areas, by arranging the first optical path conversion part in the first area and the second optical path conversion part in the second area, the light emitted by the pixel light-emitting layer in the first area can be at least partially converged by the first optical path conversion part and then emitted to the The light-emitting surface of the display panel is capable of deflecting at least part of the light emitted by the pixel light-emitting layer in the second region to the light-emitting surface of the display panel after being deflected by the second light-path converting part. , the display brightness of the display panels in the first area and the second area can be more effectively enhanced, so as to achieve the uniformity of the display brightness of the display panels in the bending area and the flat area.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

FIG. 1 is a side view structural view of a display panel in the prior art;

FIG. 2 is a top-view structural view of a display panel in the prior art;

FIG. 3 is a schematic structural diagram of a display panel provided by an embodiment of the present application;

Fig. 4 shows a cross-sectional view along A-A' of the display panel provided by the embodiment of Fig. 3;

FIG. 5 shows a schematic structural diagram of the bending region provided by the embodiment of the present application;

FIG. 6 shows another schematic structural diagram of the bending region provided by the embodiment of the present application;

FIG. 7 shows another schematic structural diagram of the bending region provided by the embodiment of the present application;

FIG. 8 shows another schematic structural diagram of the bending region provided by the embodiment of the present application;

FIG. 9 is another schematic structural diagram of the display panel provided by the embodiment of the present application;

FIG. 10 is a schematic structural diagram of a display device provided by an embodiment of the present application.

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification.

In all examples shown and discussed herein, any specific values should be construed as illustrative only and not limiting. Accordingly, other instances of the exemplary embodiment may have different values.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further discussion in subsequent figures.

FIG. 1 is a side structural view of a display panel 300 in the prior art, and FIG. 2 is a top view of the display panel 300 in the prior art. There is a flat area 301 and a bending area 302. The flat area 301 is at least partially adjacent to the bending area 302. In order to achieve a good bending effect of the display panel 300 and avoid tensile stress causing the display area to rupture, the bending area 302 The display panel is a curved display panel, and the side of the bending area 302 close to the flat area 301 is a sudden change area of the curved surface, that is, the radius of curvature of the side of the bending area 302 close to the flat area 301 is smaller than the radius of curvature in the middle of the bending area 302 , causing the light emitted by the display panel on the side of the bending area 302 close to the flat area 301 to be emitted to the bending center axis of the bending area 302, resulting in less light from the display panel on the side of the bending area 302 close to the flat area 301 entering The eyes of the device user, therefore, the display panel in the bending area 302 near the flat area will appear two darker areas, as shown in a in FIG. 2 . In addition, when the display panel 300 is unfolded, the distance between the flat area 301 and the device user is smaller than the distance between the bending area 302 and the device user. The less the light is received by the user of the device, the brightness of the bending area 302 is relatively darker than that of the flat area 301, as shown in b in FIG. 2, and the brightness of the flat area is c. , when the display panel 300 is displayed, the brightness of the display panel 300 is c>b>a. Obviously, the brightness of the display panel 300 is not uniform, which affects the display effect.

In view of this, the present invention provides a flexible display panel and a display device. According to the size of the radius of curvature of the bending area, and the size of the vertical distance between the bending area and the plane where the flat area of the display panel is located, the bending area is divided into The first area and the second area respectively improve the problem of uneven brightness of the display panel in the first area and the second area, thereby realizing the uniformity of display brightness of the display panel.

The following detailed description will be given in conjunction with the accompanying drawings and specific embodiments.

FIG. 3 is a schematic structural diagram of the display panel 100 provided by the embodiment of the present application, and FIG. 4 is a cross-sectional view of the display panel 100 provided by the embodiment of FIG. 3 along AA'. A schematic structural diagram of the bending area 10 provided by the embodiment of the present application is shown. Please refer to FIGS. 3 to 5 . A flexible display panel 100 provided by the present application includes: the bending area 10 and the bending area 10 . Zones 10 are at least partially adjacent planar zones 20;

The bending area 10 further includes a first area 30 and at least one second area 40 adjacent to the first area 30;

Along the direction perpendicular to the plane of the plane region 20, namely the direction d, the bending region 10 includes the pixel light-emitting layer 50, the light path conversion layer 60, and at least one first light path conversion part 70 and/or at least one second light path conversion part 80 , the optical path conversion layer 60 is located on the side of the pixel light emitting layer 50 close to the plane where the plane area 20 is located, at least one of the first optical path conversion part 70 and the second optical path conversion part 80 is located in the optical path conversion layer 60, the first optical path conversion part 70 The orthographic projection on the plane where the plane area 20 is located is located within the orthographic projection range of the plane where the first area 30 is located on the plane area 20; within the orthographic projection of the plane;

Please continue to refer to FIG. 5 , in the first area 30 , the light emitted by the pixel light emitting layer 50 is at least partially converged by the first light path converting portion 70 and then exits to the light emitting surface of the display panel; in the second area 40 , the light emitted by the pixel light emitting layer 50 At least part of the light is deflected by the second light path converting portion 80 and then exits to the light emitting surface of the display panel.

It should be noted that, what is shown in FIG. 3 only illustrates a relationship between the plane area 20 and the bending area 10 , and does not represent the actual size. 4 only schematically shows a positional relationship diagram of the second optical path conversion part 80 in the optical path conversion layer 60 , there are other positional relationships in this application, which are not specifically limited here, and need to be explained Yes, as shown in FIG. 4 only schematically shows a relative positional relationship between the first area 30 and the second area 40 , and does not represent the actual size; as shown in FIG. 4 only schematically shows the pixel light-emitting layer 50 A schematic diagram of the emitted light passing through the first area 30 and the second area 40 . FIG. 5 only schematically shows the light exit direction of the display panel in the bending region 10 , and does not represent an actual angle.

Specifically, please continue to refer to FIG. 4 , a flexible display panel 100 of this embodiment is provided with a bending area 10 and a flat area 20 . The existence of the bending area 10 enables the flexible display panel 100 to be bent, while the bending area The display panel 100 in 10 is curved, and includes a first area 30 and a second area 40, wherein the first area 30 and the second area 40 are adjacent. Along the direction perpendicular to the plane where the plane region 20 is located, that is, the direction d, the bending region 10 further includes the pixel light-emitting layer 50, the light path conversion layer 60, and at least one first light path conversion part 70 and/or at least one second light path conversion part 80. The light path conversion layer 60 is located at any film layer between the pixel light emitting layer 50 and the light-emitting surface of the display panel 100 in the bending area 10. Optionally, the light path conversion layer 60 can be multiplexed with the pixel light emitting layer 50 to display near the bending area 10. Any film layer on the light-emitting surface side of the panel 100 may also be provided with a single layer. The first light path conversion part 70 and the second light path conversion part 80 are both located between the pixel light emitting layer 50 and the light emitting surface of the display panel 100 corresponding to the bending region 10 , and the first light path conversion part 70 and the second light path conversion part 80 At least one of them is located in the light path conversion layer 60. When the display panel 100 is in a flattened state, the orthographic projection of the first light path conversion portion 70 on the plane where the plane area 20 is located is located within the orthographic projection range of the first area 30 on the plane where the plane area 20 is located. , the orthographic projection of the second optical path conversion part 80 on the plane where the plane area 20 is located is located within the orthographic projection range of the second area 40 on the plane where the plane area 20 is located, wherein the first optical path conversion part 70 and the second optical path conversion part 80 improve the The problem of uneven brightness of the display panel 100 corresponding to the first area 30 and the second area 40, and the problem of uneven brightness of the display panel in the bending area 10 and the display panel in the flat area 20.

Further, please continue to refer to FIG. 5 and in conjunction with FIG. 4 , the light emitted by the pixel light-emitting layer 50 is emitted to the light-emitting surface of the display panel, wherein the light emitted by the pixel light-emitting layer 50 passes through the first area of the first area 30 . The light path conversion part 70 converges and then exits to the light emitting surface of the display panel in the first area 30 ; the light emitted by the pixel light emitting layer 50 is deflected by the second optical path conversion part 80 in the second area 40 and then exits to the display panel in the second area 40 to emit light In this way, the first optical path conversion part 70 is used for condensing the light in the first area 30, and the second optical path conversion part 80 is used for deflecting the light in the second area 40 and then emitting it in a direction perpendicular to the plane of the plane area 20, so that The setting method can make the bending area 10 emit more light along the direction perpendicular to the plane of the plane area 20, and can effectively enhance the display brightness of the first area 30 and the second area 40 of the bending area 10, so as to overcome the In the prior art, the brightness of the flat area and the bending area is not uniform.

Optionally, please continue to refer to FIG. 5 and in conjunction with FIG. 4 , the radius of curvature of the first region 30 is greater than the radius of curvature of the second region 40 . Specifically, please continue to refer to FIG. 5 and in conjunction with FIG. 4 , in order to achieve a good bending effect of the display panel 100 and avoid the problem of rupture of the display panel 100 caused by tensile stress, the display panel 100 in the bending area 10 is a curved surface and the curvature radii of the curved surfaces are not completely equal, the area of the bending area 10 close to the plane area 20 is a sudden change area, and the area in the middle of the bending area 10 is a gentle area, that is, the first area 30 is a gentle area, and the second area 40 is a In the sudden change region, the radius of curvature of the first region 30 is greater than that of the second region 40 . In this embodiment, a second optical path conversion part 80 is provided in the second region 40 , because the radius of curvature of the first region 30 is greater than that of the second region 40 . The curvature radius is such that the light emitted by the pixel light-emitting layer 50 in the second area 40 is directed to the bending center axis of the bending area 10, and the light is not emitted in the direction of the plane perpendicular to the plane area 20, so that the display panel in the second area 40 Compared with the light emitted by the display panel in the first area 30 and the light emitted by the display panel in the flat area 20, the emitted light is darker. Therefore, in view of the above problems, in this embodiment, 80 second light path conversion parts are provided in the second area 40, The light emitted by the pixel light-emitting layer 50 is deflected by the second light path conversion part 80 and then emitted in a direction perpendicular to the plane where the plane area 20 is located. On the other hand, the difference between the display brightness of the display panel in the second area 40 and the display brightness of the display panel in the flat area 20 is reduced, so as to make the second area as much as possible The light of 40 is emitted in the direction perpendicular to the plane of the plane area 20, which further enhances the brightness of the display panel corresponding to the second area 40, improves the display brightness of the display panel in the second area 40, and the display brightness of the display panel 100 in the first area 30. , and the uniformity of the display brightness of the display panel 100 in the flat area 20 .

Optionally, please continue to refer to FIG. 4 , the vertical distance between the first area 30 and the plane where the plane area 20 is located is greater than the vertical distance between the second area 40 and the plane where the plane area 20 is located.

Specifically, please continue to refer to FIG. 4 , the vertical distance between the first area 30 and the plane where the plane area 20 is located is d ₁ , and the vertical distance between the second area 40 and the plane where the plane area 20 is located is d ₂ , where d ₁ represents The vertical distance between any point on the curved display panel in the first area 30 and the plane where the plane area 20 is located, d ₂ represents the vertical distance between any point on the curved display panel in the second area 40 and the plane where the plane area 20 is located, d ₁ >d ₂ , The distance between the first area 30 and the plane where the plane area 20 is located is farther than the distance between the plane area 20 and the plane where the plane area 20 is located. The light emitted by the pixel light-emitting layer 50 enters the eyes of the device viewer after more scattering, so that the The display brightness of the first area 30 is different from the display brightness of the flat area 20. Therefore, the first light path conversion parts 70 are provided in the first area 30, and the first light path conversion parts 70 can effectively condense light to enhance the first light path conversion part 70. The display brightness of the display panel in the area 30 makes the display brightness of the display panel in the first area 30 more uniform with the display brightness of the display panel in the flat area 20 .

Optionally, please continue to refer to FIG. 4 , the second area 40 includes a first edge 41 and a second edge 42 disposed opposite to each other, the first edge 41 is adjacent to the plane area 20 , and the second edge 42 is adjacent to the first area 30 . adjacent.

Specifically, please continue to refer to FIG. 4 , the second area 40 is adjacent to both the plane area 20 and the first area 30 , that is, the second area 40 is located between the first area 30 and the plane area 20 , the first area 30 and the The second area 40 belongs to the bending area 10 , the bending area 10 is connected to the plane area 20 , the second area 40 includes a first edge 41 and a second edge 42 arranged oppositely, and the first edge 41 is connected to the bending area 10 . Then, the second edge 42 is in contact with the first area 30. By describing the positional relationship between the flat area 20 and the bending area 10 when the display panel 100 is unfolded, the relationship between the first area 30 and the second area 40 and the flat area 20 is further clarified. Positional relationship, clarify the problems existing in the display panel in the first area 30 and the display panel in the second area 40, that is, along the direction from the first edge 41 to the second edge 42, the radius of curvature of the display panel corresponding to the second area 40 gradually increases , the distance between the second edge 42 and the plane where the light-emitting surface of the plane area is located is greater than the distance between the first edge 41 and the plane where the plane area is located, which can solve the problem of the brightness difference between the bending area and the plane area caused by this problem. Brightness uniformity in bent and flat areas.

Optionally, FIG. 6 shows another schematic structural diagram of the bending region 10 provided by the embodiment of the present application. Please refer to FIG. 6 , the first optical path conversion part 70 is a convex lens 71, and the focal length direction of the convex lens 71 is vertical. On the plane where the plane area 20 is located; the distance between the centers of any two adjacent convex lenses 71 is the same.

It should be noted that, as shown in FIG. 6 , only one arrangement of the convex lenses 71 is schematically shown. Optionally, in some other embodiments, the adjacent convex lenses 71 may also be arranged according to the display panel of the first area 30 . The degree of bending sets the spacing.

Specifically, please continue to refer to FIG. 6 and in conjunction with FIG. 4 , the first optical path conversion part 70 in this embodiment is a convex lens 71 , the focal length direction e of the convex lens 71 is perpendicular to the plane where the plane area 20 is located, and the convex lens 71 is A lens with a thick middle and a thin edge, which includes at least one spherical surface, that is, the spherical surface of the convex lens 71 faces the pixel light-emitting layer 50, or the two spherical surfaces included in the convex lens 71 face the plane where the pixel light-emitting layer 50 and the plane area 20 are located, respectively. The convex lens 71 It can play a good role in concentrating light, that is, the light emitted by the pixel light-emitting layer 50 is collected and then emitted to the light-emitting surface of the display panel in the bending area 10 to enhance the light intensity of the display panel corresponding to the first area 30, so that the The display panel is brighter to overcome the difference in brightness caused by the long distance between the planes where the first area 30 and the plane area 20 are located.

Further, please continue to refer to FIG. 6 , a plurality of convex lenses 71 are arranged in the first area 30 . Since the display panel corresponding to the first area 30 is relatively flat, the distance f between the centers of any two adjacent convex lenses 71 is equal to Equal, can not only achieve the effect of concentrating light, but also simplify the production process.

Optionally, please continue to refer to FIG. 6 , along the direction perpendicular to the plane of the plane area 20, that is, the direction d, the vertical distance from the center of the convex lens 71 to the side of the pixel light-emitting layer 50 close to the light path conversion layer 60 is greater than the distance of the convex lens 71. Double the focal length.

Specifically, please continue to refer to FIG. 6 , along the direction perpendicular to the plane where the plane area 20 is located, that is, the direction d, the vertical distance h between the center of the convex lens 71 and the side of the pixel light-emitting layer 50 close to the optical path conversion layer 60 is greater than the distance h of the convex lens 71 The focal length is doubled. In this way, on the one hand, the thickness of the convex lens 71 along the plane of the vertical plane area 20 can be determined according to the vertical distance between the pixel light emitting layer 50 and the convex lens 71; on the other hand, the pixel light emitting layer 50 can be The emitted light is more concentrated after passing through the convex lens 71 to enhance the display brightness of the display panel in the first area 30 .

Optionally, FIG. 7 shows another schematic structural diagram of the bending region 10 provided by the embodiment of the present application. Please refer to FIG. 7 , the second optical path conversion part 80 is a reflection mirror 81 , and the reflection mirror 81 is connected to the plane. An included angle is set between the planes where the zone 20 is located.

It should be noted that FIG. 7 only schematically shows an arrangement of the reflecting mirrors 81 , and optionally, the distance between any two adjacent reflecting mirrors 81 may be set to be equal.

Specifically, please continue to refer to FIG. 7 and in conjunction with FIG. 4 , the second optical path conversion part 80 in this embodiment is a reflector 81 , and the purpose of setting the reflector 81 is to reflect the pixel light-emitting layer of the second area 40 50, since the curved surface of the display panel in the second area 40 is a sudden change area, the mirror 81 needs to be placed corresponding to the pixels of the pixel light-emitting layer 50 in the second area 40, and the light emitted by the pixel light-emitting layer 50 in the second area 40 It is emitted to the bending center axis of the bending area 10, so that the placement of the mirror 81 and the plane where the plane area 20 is located have a certain angle α, which is conducive to the emission of as much light as possible from the pixel light-emitting layer 50 in the second area 40. After reflection, it is emitted along the direction of the plane where the vertical plane area 20 is located, so as to overcome the difference in brightness caused by the curvature radius of the second area 40 being smaller than the curvature radius of the first area 30 .

Optionally, please continue to refer to FIG. 7 , along the direction from the first edge 41 to the second edge 42 , the distance between the orthographic projections of the centers of adjacent mirrors 81 on the plane where the plane area 20 is located increases.

Specifically, please continue to refer to FIG. 7 , along the direction from the first edge 41 of the second area 40 to the second edge 42 , since the radius of curvature of the display panel 100 in the second area 40 gradually increases, that is, with the second In the process that the display panel in the area 40 gradually changes from abrupt change to a gradual slowdown, the distance between the centers of the adjacent mirrors 81 on the orthographic projection of the plane where the plane area 20 is located increases, so that the light emitted by the pixel light-emitting layer 50 in the second area 40 can be as much as possible. A large amount of light is emitted to the reflecting mirror 81 , so that the light of the second region 40 is emitted as much as possible along the direction perpendicular to the plane of the plane region 20 , so as to enhance the brightness of the second region 40 .

Optionally, please continue to refer to FIG. 7, along the direction from the first edge 41 to the second edge 42, the angle between the mirror 81 and the plane where the plane area 20 is located increases, and the mirror 81 and the plane area 20 are located. The angles between the planes are all less than 90 ^° .

Specifically, please continue to refer to FIG. 7 , along the direction from the first edge 41 to the second edge 42 , the angle α between the mirror 81 and the plane where the plane area 20 is located increases, because the display panel corresponding to the second area 40 The curvature radius of the curved surface of 100 gradually increases, and the angle between the light emitted by the pixel light-emitting layer 50 and the plane where the plane area 20 is located gradually increases along the direction from the first edge 41 to the second edge 42. Therefore, the reflector 81 and the plane The angle between the planes where the area 20 is located increases by α. Further, since the angle between the light emitted by the light emitting layer 50 of the pixels in the second area 40 and the plane where the plane area 20 is located will not be greater than 90 ^° , the reflector 81 and the The included angle α between the planes where the plane region 20 is located is always smaller than 90 ^° . With this arrangement, the light emitted by the pixel light-emitting layer 50 in the second region 40 can be more effectively reflected as much as possible and then emitted along the direction of the plane where the vertical plane region 20 is located.

Optionally, please continue to refer to as shown in FIG. 7 , each mirror 81 has the same size.

Specifically, please continue to refer to FIG. 7 , the size of each reflector 81 is equal, which can simplify the manufacturing process, and the size of the reflector 81 cannot be greater than the thickness of the optical path conversion layer 60 to prevent the optical path conversion layer 60 from being unable to hold Mirror 81 . Optionally, the size of the reflector 81 can be adjusted according to the curvature of the curved surface of the display panel corresponding to the second region 40 , and the reflector 81 can be made into different sizes.

Optionally, FIG. 8 shows another schematic structural diagram of the bending region 10 provided by the embodiment of the present application. Please refer to FIG. 8 , the vertical distance between the first light path conversion part 70 and the pixel light emitting layer 50 It is greater than the vertical distance between the second light path conversion part 80 and the pixel light emitting layer 50 .

Specifically, please continue to refer to FIG. 8 , the vertical distance between the first optical path conversion part 70 and the pixel light emitting layer 50 is greater than the vertical distance between the second optical path conversion part 80 and the pixel light emitting layer 50 , and the first optical path conversion part 70 is used for converging light. In order to avoid the light condensed by the first light path conversion part 70 being scattered by more film layers, the first light path conversion part 70 is arranged as far as possible from the pixel light emitting layer 50, the better. The two light path conversion parts 80 are used to deflect the light. Therefore, the closer the second light path conversion part 80 is to the pixel light-emitting layer 50, the better. This arrangement can better improve the relative relationship between the first area 30 and the second area 40. The display brightness difference in the plane area 20 .

Optionally, please continue to refer to FIG. 8 , the bending area 10 further includes a touch layer 90 ;

The first light path conversion part 70 is located on the side of the touch layer 90 away from the pixel light emitting layer 50 , the second light path conversion part 80 is located on the light path conversion layer 60 , and the light path conversion layer 60 is located on a side of the pixel light emitting layer 50 close to the light emitting surface of the display panel 100 . side.

Specifically, please continue to refer to FIG. 8 , in this embodiment, the bending area 10 further includes a touch layer 90 , the first light path conversion part 70 is located on the side of the touch layer 90 away from the pixel light emitting layer 50 , and the second light path conversion part 70 The portion 80 is located on the optical path conversion layer 60, and the optical path conversion layer 60 is located on the side of the pixel light-emitting layer 50 close to the light-emitting surface of the display panel 100, so that the light emitted by the pixel light-emitting layer 50 in the first area 30 is concentrated as much as possible. Avoid scattering, so that the light emitted by the pixel light-emitting layer 50 in the second area 40 is deflected as much as possible and then exits in a direction perpendicular to the plane where the flat area 20 is located, so that the display brightness of the bending area 10 and the flat area 20 is more uniform . In addition, it should be noted that when the position of the reflector 81 is far away from the pixel light-emitting layer 50 , the size of the reflector 81 and the spacing between adjacent reflectors 81 are more difficult to set, which will increase the difficulty of the process.

It should be noted that the bending area 10 further includes an encapsulation layer 91, and the first optical path conversion part 70 and the second optical path conversion part 80 may also be located in any film layer in the touch layer 90 or the encapsulation layer 91, or, the optical path conversion part The layer 60 can reuse any film layer between the pixel light-emitting layer 50 and the cover plate, and can achieve the purpose of changing the light path.

Optionally, please continue to refer to FIG. 4 , the pixel light-emitting layer 50 includes a plurality of pixel units arranged in an array;

In the first area 30, the outgoing light of n pixel units passes through the same first light path conversion part 70, n≥1;

In the second area 40, the outgoing light of m pixel units passes through the same second light path conversion part 80, and m≧1.

Specifically, please continue to refer to FIG. 4 , the pixel light-emitting layer 50 includes a plurality of pixel units arranged in an array, and in the first area 30 , the outgoing light of n pixel units passes through the same first light path conversion part 70 , and n≧ 1. In the second area 40, the emitted light of m pixel units passes through the same second optical path conversion part 80, m≥1, according to the size of the pixel in the pixel light-emitting layer 50 and the thickness of the film layer, the first optical path conversion part The size of the first optical path conversion part 70 and the second optical path conversion part 80 can be flexibly controlled.

Optionally, FIG. 9 shows another schematic structural diagram of the display panel 100 provided by the embodiment of the present application. Please refer to FIG. 9 , the bending area 10 includes two second areas 40 , and the first area 30 is located in the between the two second regions 40 .

Specifically, please continue to refer to FIG. 9 , the bending area 10 includes two second areas 40 , the first area 30 is located between the two second areas 40 , and the two second areas 40 have the same structure. The folding area 10 is composed of two second areas 40 and one first area 30 , and the two second areas 40 are both connected to the plane area 20 , so as to realize the complete folding state of the bending area 10 , so that the plane area 20 is completely folded. The display panels 100 can be attached to each other when folded, saving space and being portable.

Based on the same inventive concept, FIG. 10 is a schematic structural diagram of a display device 200 provided by an embodiment of the present application. Please refer to FIG. 10 . The present application also provides a display device 200 , and the display device 200 includes a flexible display device. The panel 100, the flexible display panel 100 is the 100 provided by any one of the above-mentioned embodiments of the present application, and repeated details will not be repeated. The display device 200 provided in the present application can be any product or component with a photographing function, a touch function and a display function, such as a mobile phone, a tablet computer, a monitor, a notebook computer, a digital photo frame, and a navigator.

It should be noted that the embodiment shown in FIG. 10 only schematically shows a relative positional relationship between the flexible display panel 100 and the display device 200 , and does not represent the actual size.

It can be known from the above embodiments that the beneficial effects of the present application are:

In the flexible display panel and display device provided by the present application, the bending area is divided into a first area and a second area according to the size of the radius of curvature of the bending area and the vertical distance between the bending area and the plane where the flat area of the display panel is located. Two areas, by arranging the first optical path conversion part in the first area and the second optical path conversion part in the second area, the light emitted by the pixel light-emitting layer in the first area can be at least partially converged by the first optical path conversion part and then emitted to the The light-emitting surface of the display panel is capable of deflecting at least part of the light emitted by the pixel light-emitting layer in the second region to the light-emitting surface of the display panel after being deflected by the second light-path converting part. , the display brightness of the display panels in the first area and the second area can be more effectively enhanced, so as to achieve the uniformity of the display brightness of the display panels in the bending area and the flat area.

The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various and other combinations, modifications and environments, and can be modified within the scope of the inventive concepts described herein, from the above teachings or from skill or knowledge in the relevant art. However, modifications and changes made by those skilled in the art do not depart from the spirit and scope of the present application, and should all fall within the protection scope of the appended claims of the present application.

Claims (15)

1. A flexible display panel, comprising: a bending zone and a planar zone at least partially adjacent to the bending zone;

the bending zone further comprises a first region and at least one second region adjacent to the first region;

along a direction perpendicular to a plane where the plane area is located, the bending area comprises a pixel light emitting layer, a light path conversion layer and at least one first light path conversion part and/or at least one second light path conversion part, the light path conversion layer is located on one side, close to the plane where the plane area is located, of the pixel light emitting layer, at least one of the first light path conversion part and the second light path conversion part is located in the light path conversion layer, and the orthographic projection of the first light path conversion part on the plane where the plane area is located in the orthographic projection range of the first area on the plane where the plane area is located; the orthographic projection of the second light path conversion part on the plane of the plane area is positioned in the orthographic projection range of the second area on the plane of the plane area;

in the first area, at least part of the light emitted by the pixel light emitting layer is converged by the first light path conversion part and then emitted to the light emitting surface of the display panel; in the second area, at least part of the light emitted by the pixel light-emitting layer is deflected by the second light path conversion part and then emitted to the light-emitting surface of the display panel.

2. The flexible display panel of claim 1, wherein the radius of curvature of the first region is greater than the radius of curvature of the second region.

3. The flexible display panel of claim 2,

the perpendicular distance between the first area and the plane of the plane area is larger than that between the second area and the plane of the plane area.

4. The flexible display panel of claim 3, wherein the second region comprises a first edge and a second edge disposed opposite to each other, the first edge being adjacent to the planar region, and the second edge being adjacent to the first region.

5. The flexible display panel according to claim 1, wherein the first light path conversion portion is a convex lens, and a focal length direction of the convex lens is perpendicular to a plane of the planar area;

the distance between the centers of any two adjacent convex lenses is equal.

6. The flexible display panel of claim 5, wherein a vertical distance from a center of the convex lens to a side of the pixel light emitting layer close to the light path conversion layer along a direction perpendicular to a plane of the planar area is greater than two times a focal length of the convex lens.

7. The flexible display panel of claim 3, wherein the second light path conversion portion is a mirror, and an included angle is formed between the mirror and a plane of the planar area.

8. The flexible display panel of claim 7, wherein along the direction from the first edge to the second edge, the distance between the orthogonal projections of the centers of adjacent mirrors on the plane of the planar area decreases.

9. The flexible display panel of claim 7, wherein along the direction from the first edge to the second edge, the angles between the reflector and the plane of the planar area increase gradually, and the angles between the reflector and the plane of the planar area are all smaller than 90 degrees^°。

10. The flexible display panel of claim 7, wherein each of the mirrors is equal in size.

11. The flexible display panel of claim 1, wherein a vertical distance between the first light path conversion part and the pixel light emitting layer is greater than a vertical distance between the second light path conversion part and the pixel light emitting layer.

12. The flexible display panel of claim 11, wherein the bending region further comprises a touch layer;

the first light path conversion part is positioned on one side of the touch layer far away from the pixel light emitting layer, the second light path conversion part is positioned on the light path conversion layer, and the light path conversion layer is positioned on one side of the pixel light emitting layer close to the light emitting surface of the display panel.

13. The flexible display panel of claim 1, wherein the pixel light emitting layer comprises a plurality of pixel units arranged in an array;

in the first area, the emergent light of n pixel units passes through the same first light path conversion part, and n is more than or equal to 1;

in the second area, the emergent light of m pixel units passes through the same second light path conversion part, and m is larger than or equal to 1.

14. The flexible display panel of claim 1, wherein the bending region comprises two of the second regions, and wherein the first region is located between the two of the second regions.

15. A display device comprising the flexible display panel according to any one of claims 1 to 14.

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