CN111968526A - Flexible display panel and display device - Google Patents
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- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The application discloses flexible display panel and display device relates to and shows technical field, includes: a bending zone and a planar zone; the bending area also comprises a first area and a second area; along the direction perpendicular to the plane of the plane area, 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 positioned on one side of the pixel light emitting layer close to the plane area, at least one of the first light path conversion part and the second light path conversion part is positioned on the light path conversion layer, and the orthographic projection of the first light path conversion part on the plane area is positioned in the orthographic projection range of the first area on the plane area; 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. This application sets up first light path converting part and second light path converting part, effectively improves the light intensity in bending zone, makes bending zone and planar area display luminance homogeneous.
Description
Technical Field
The application relates to the technical field of display, in particular to a flexible display panel and a display device.
Background
Organic Light-Emitting diodes (OLED) have the advantages of wide color gamut, high contrast, energy saving, and being foldable, and thus become one of the most competitive technologies in the next generation of display devices, especially, OLED displays having foldable features are favored by people, and have a wide application field, for example, the fields of smart wearable devices, vehicle-mounted devices, and smart home appliances.
At present, in a flexible display device, a part of an area in a flexible display panel needs to be bent to form a bending area, and the forming of the bending area makes the distance between a light-emitting surface of the display panel in the bending area and a device user farther than the distance between the light-emitting surface of the display panel in a planar area and the device user when the display panel is in an unfolded state; on the other hand, a dead zone still exists in a part of the display panel in the bending area, so that the brightness of the plane area and the bending area is not uniform, and the display effect of the display panel is affected.
Disclosure of Invention
In view of the above, the present disclosure provides a flexible display panel and a display device, in which a bending region is divided into a first region and a second region according to a curvature radius of the bending region and a vertical distance between the bending region and a plane of the display panel, so as to improve a problem of non-uniform brightness of the display panel in the first region and the second region, and further achieve uniformity of display brightness of the display panel.
In order to solve the technical problem, the following technical scheme is adopted:
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 zone further comprises a first area and at least one second area adjacent to the first area;
along the direction perpendicular to the plane of the plane area, 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 positioned on one side of the pixel light emitting layer close to the plane area, at least one of the first light path conversion part and the second light path conversion part is positioned on the light path conversion layer, and the orthographic projection of the first light path conversion part on the plane area is positioned in the orthographic projection range of the first area on the plane area; 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 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.
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 in the present application.
Compared with the prior art, the flexible display panel and the display device provided by the invention at least realize the following beneficial effects:
according to the flexible display panel and the display device provided by the application, according to the size of the curvature radius of the bending area, and dividing the bending area into a first area and a second area according to the vertical distance between the bending area and the plane of the display panel, arranging a first light path conversion part in the first area, the second light path conversion part is arranged in the second area, at least part of light emitted by the pixel light emitting layer in the first area can be converged by the first light path conversion part and then emitted to the light emitting surface of the display panel, at least part of light emitted by the pixel light emitting layer in the second area can be deflected by the second light path conversion part and then emitted to the light emitting surface of the display panel, and the light path conversion parts are respectively arranged according to the characteristics of the first area and the second area, so that the display brightness of the display panel in the first area and the display brightness of the display panel in the second area can be more effectively enhanced, and the uniformity of the display brightness of the display panel in the bending area and the display panel in the plane area.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a side view of a prior art display panel;
FIG. 2 is a top view of a prior art display panel;
fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
FIG. 4 is a cross-sectional view of the display panel along A-A' of the embodiment of FIG. 3;
FIG. 5 is a schematic view of a bending region according to an embodiment of the present disclosure;
FIG. 6 is a schematic view of another embodiment of a bending region provided in the present application;
FIG. 7 is a schematic view of another embodiment of a bending region provided in the present application;
FIG. 8 is a schematic view of another embodiment of a bending region provided in the present application;
fig. 9 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.
Detailed Description
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 the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present 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 are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a side view structural diagram of a display panel 300 in the prior art, and fig. 2 is a top view structural diagram of the display panel 300 in the prior art, where the display panel 300 includes a planar area 301 and a bending area 302 sequentially arranged along a first direction, the planar area 301 is at least partially adjacent to the bending area 302, so as to achieve a good bending effect of the display panel 300 and avoid the display area from being cracked due to a tensile stress, and therefore, the display panel of the bending area 302 is a curved display panel, and one side of the bending area 302 close to the planar area 301 is a curved abrupt change area, that is, a curvature radius of one side of the bending area 302 close to the planar area 301 is smaller than a curvature radius of the middle of the bending area 302, so that light emitted from the display panel of the bending area 302 close to one side of the planar area 301 is emitted toward a bending central axis of the bending area 302, and light emitted from the display panel of the bending area 302 close to one side of the planar area, thus, two darker areas, shown as a in FIG. 2, appear in the display panel near the flat area in the bending area 302. In addition, when the display panel 300 is unfolded, the distance between the flat area 301 and the user of the device is smaller than the distance between the bending area 302 and the user of the device, and the longer the distance, the more the light is scattered, the less the light emitted by the bending area 302 is received by the user of the device, and further the luminance of the bending area 302 is darker than the luminance of the flat area 301, as shown in b in fig. 2, and in addition, the luminance of the flat area is c, and when the display panel 300 is viewed as a whole, the luminance of the display panel 300 is c > b > a, and obviously, the luminance of the display panel 300 is not uniform, which affects the display effect.
In view of the above, the present invention provides a flexible display panel and a display device, wherein the bending region is divided into a first region and a second region according to the curvature radius of the bending region and the vertical distance between the bending region and the plane of the display panel, so as to improve the problem of non-uniform brightness of the display panel in the first region and the second region, respectively, and further achieve the uniformity of the display brightness of the display panel.
The following detailed description is to be read in connection with the drawings and the detailed description.
Fig. 3 is a schematic structural diagram of a display panel 100 according to an embodiment of the present disclosure, fig. 4 is a cross-sectional view of the display panel 100 along a-a' of the display panel 100 according to the embodiment of the present disclosure, fig. 5 is a schematic structural diagram of a bending region 10 according to the embodiment of the present disclosure, please refer to fig. 3 to 5, which illustrate that a flexible display panel 100 according to the present disclosure includes: a bending zone 10 and a planar zone 20 at least partially adjacent to the bending zone 10;
the bending zone 10 further comprises a first region 30 and at least one second region 40 adjacent to the first region 30;
along a direction perpendicular to the plane of the planar area 20, that is, along a direction d, the bending area 10 includes a pixel light emitting layer 50, an optical path conversion layer 60, and at least one first optical path conversion portion 70 and/or at least one second optical path conversion portion 80, the optical path conversion layer 60 is located on one side of the pixel light emitting layer 50 close to the plane of the planar area 20, at least one of the first optical path conversion portion 70 and the second optical path conversion portion 80 is located on the optical path conversion layer 60, and an orthographic projection of the first optical path conversion portion 70 on the plane of the planar area 20 is located within an orthographic projection range of the first area 30 on the plane of the planar area 20; the orthographic projection of the second light path conversion part 80 on the plane of the plane area 20 is positioned in the orthographic projection range of the second area 40 on the plane of the plane area 20;
referring to fig. 5, in the first area 30, at least a portion of the light emitted by the pixel light-emitting layer 50 is converged by the first light path conversion part 70 and then emitted to the light-emitting surface of the display panel; in the second region 40, at least a portion of the light emitted from the pixel light-emitting layer 50 is deflected by the second light path conversion portion 80 and then emitted to the light-emitting surface of the display panel.
It should be noted that fig. 3 only illustrates one relationship between the flat area 20 and the bending area 10, and does not represent actual dimensions. Fig. 4 schematically shows only one positional relationship diagram of the second optical path conversion part 80 in the optical path conversion layer 60, and the present application also shows other positional relationships, which are not specifically limited herein, and it should be noted that fig. 4 schematically shows only one relative positional relationship diagram of the first region 30 and the second region 40, which does not represent actual dimensions; fig. 4 only schematically shows that light emitted from the pixel light-emitting layer 50 exits through the first region 30 and the second region 40. The light exiting direction of the display panel at the bending region 10 is only schematically shown in fig. 5, and does not represent an actual angle.
Specifically, referring to fig. 4, the flexible display panel 100 of the present embodiment is provided with a bending area 10 and a planar area 20, the flexible display panel 100 can be bent due to the existence of the bending area 10, and the display panel 100 in the bending area 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 to each other. Along a direction perpendicular to the plane of the planar area 20, i.e. the direction d, the bending area 10 further includes a pixel light emitting layer 50, a light path conversion layer 60, and at least one first light path conversion portion 70 and/or at least one second light path conversion portion 80, where the light path conversion layer 60 is located on any film layer between the pixel light emitting layer 50 and the light emitting surface of the display panel 100 of the bending area 10, and optionally, the light path conversion layer 60 may multiplex any film layer on the side of the pixel light emitting layer 50 close to the light emitting surface of the display panel 100 of the bending area 10, or may be separately disposed as one 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 at least one of the first and second light path conversion parts 70 and 80 is positioned at the light path conversion layer 60, when the display panel 100 is in the flat state, the orthographic projection of the first light path conversion part 70 on the plane of the plane area 20 is within the orthographic projection range of the first area 30 on the plane of the plane area 20, the orthographic projection of the second light path conversion part 80 on the plane of the plane area 20 is within the orthographic projection range of the second area 40 on the plane of the plane area 20, the first optical path conversion part 70 and the second optical path conversion part 80 respectively improve 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 refer to fig. 5 in combination with fig. 4, the light emitted from the pixel light emitting layer 50 is emitted to the light emitting surface of the display panel, wherein the light emitted from the pixel light emitting layer 50 is converged by the first light path transformation portion 70 of the first area 30 and then emitted to the light emitting surface of the display panel of the first area 30; the light emitted from the pixel light-emitting layer 50 is deflected by the second light path converting portion 80 of the second region 40 and then emitted to the light-emitting surface of the display panel of the second region 40, so that the first light path converting portion 70 is used for converging the light of the first region 30, and the second light path converting portion 80 is used for deflecting the light of the second region 40 and then emitting the light along the direction perpendicular to the plane of the plane region 20.
Optionally, with continued reference to fig. 5, and with reference to fig. 4, the radius of curvature of the first region 30 is greater than the radius of curvature of the second region 40. Specifically, as shown in fig. 5 and with reference to fig. 4, in order to achieve a good bending effect of the display panel 100 and avoid the problem of the display panel 100 being cracked due to the tensile stress, the display panel 100 of the bending region 10 is curved, and the curvature radii of the curved surfaces are not completely equal, the region of the bending region 10 close to the planar region 20 is an abrupt change region, the middle region of the bending region 10 is a gentle region, i.e. the first region 30 is a gentle region, the second region 40 is an abrupt change region, the curvature radius of the first region 30 is greater than the curvature radius of the second region 40, in this embodiment, the second light path converting portion 80 is disposed in the second region 40, the curvature radius from the first region 30 is greater than the curvature radius of the second region 40, so that the light emitted from the pixel light emitting layer 50 of the second region 40 is emitted toward the bending central axis of the bending region 10, and the light is not emitted along the direction perpendicular to the plane of the planar region, therefore, in order to solve the above problem, the present embodiment provides the second optical path conversion part 80 in the second area 40, so that the light emitted from the display panel in the second area 40 is darker than the light emitted from the display panel in the first area 30 and the light emitted from the display panel in the planar area 20, and the light emitted from the pixel light-emitting layer 50 is deflected by the second optical path conversion part 80 and then emitted in the direction perpendicular to the plane of the planar area 20, so as to reduce 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 first area 30, and reduce 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 planar area 20, so as to emit the light in the direction perpendicular to the plane of the planar area 20 in the second area 40 as much as possible, and further enhance the display panel brightness corresponding to the second area 40, the display brightness of the display panel in the second area 40, the display brightness of the display panel 100 in the first area 30, and the display brightness of the display panel 100 in the planar area 20 are improved.
Optionally, as shown in fig. 4, the perpendicular distance between the first area 30 and the plane of the planar area 20 is greater than the perpendicular distance between the second area 40 and the plane of the planar area 20.
Specifically, as shown in fig. 4, the first area 30 is at a vertical distance d from the plane of the planar area 201The second region 40 is spaced from the plane of the planar region 20 by a vertical distance d2Wherein d is1Represents the vertical distance between any point on the curved display panel in the first area 30 and the plane of the flat area 20, d2Represents the vertical distance between any point on the curved display panel in the second area 40 and the plane of the flat area 20, d1＞d2The distance between the first region 30 and the plane of the plane area 20 is farther than the distance between the plane area 20 and the plane of the plane area 20, and the light emitted by the pixel light emitting layer 50 enters the eyes of the viewer of the device after being more scattered, so that the display brightness of the first region 30 is different from the display brightness of the plane area 20, therefore, the first light path conversion part 70 is disposed in the first region 30, and the first light path conversion part 70 can effectively condense light to enhance the display brightness of the display panel in the first region 30, so that the display brightness of the display panel in the first region 30 is more uniform with the display brightness of the display panel in the plane area 20.
Optionally, as shown in fig. 4, the second region 40 includes a first edge 41 and a second edge 42 disposed opposite to each other, the first edge 41 is adjacent to the planar area 20, and the second edge 42 is adjacent to the first region 30.
Specifically, as shown in fig. 4, the second region 40 is adjacent to both the planar region 20 and the first region 30, that is, the second region 40 is located between the first region 30 and the planar region 20, the first region 30 and the second region 40 belong to the bending region 10, the bending region 10 is connected to the planar region 20, the second region 40 includes a first edge 41 and a second edge 42 which are oppositely disposed, the first edge 41 is connected to the bending region 10, and the second edge 42 is connected to the first region 30, by describing the position relationship between the planar region 20 and the bending region 10 when the display panel 100 is unfolded, the position relationship between the first region 30 and the planar region 20 is further clarified, the problem of the display panel of the first region 30 and the display panel of the second region 40 is clarified, that is, the direction from the first edge 41 to the second edge 42 is along the display panel of the first region 30, and the curvature radius of the corresponding display panel of the second region 40 is gradually increased, 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, so that the problem of display brightness difference between the bending area and the plane area caused by the problem can be solved, and the brightness uniformity of the bending area and the plane area can be realized.
Optionally, fig. 6 is another schematic structural diagram of the bending region 10 provided in the embodiment of the present application, please refer to fig. 6, in which the first optical path converting portion 70 is a convex lens 71, and a focal length direction of the convex lens 71 is perpendicular to a plane of the planar region 20; the distance between the centers of any two adjacent convex lenses 71 is equal.
It should be noted that fig. 6 only schematically illustrates one arrangement of the convex lenses 71, and alternatively, in some other embodiments, the adjacent convex lenses 71 may also be spaced according to the bending degree of the display panel in the first region 30.
Specifically, referring to fig. 6 and with reference to fig. 4, in the present embodiment, the first optical path conversion portion 70 is a convex lens 71, the focal length direction e of the convex lens 71 is perpendicular to the plane of the planar area 20, the convex lens 71 is a lens with a thick middle portion and a thin edge, and at least includes a spherical surface, that is, the spherical surface of the convex lens 71 faces the pixel light emitting layer 50, or two spherical surfaces of the convex lens 71 respectively face the plane of the pixel light emitting layer 50 and the plane of the planar area 20, and the convex lens 71 can perform a good light converging function, that is, light emitted from the pixel light emitting layer 50 is converged and emitted to the light emitting surface of the display panel in the bending area 10, so as to enhance the light intensity of the display panel corresponding to the first area 30, so that the display panel corresponding to the first area 30 is brighter, and thus the brightness difference caused by the longer distance between the first area 30 and the plane of the planar area 20 is overcome.
Further, as shown in fig. 6, the plurality of convex lenses 71 are disposed in the first area 30, and since the display panel corresponding to the first area 30 is relatively flat, the distances f between the centers of any two adjacent convex lenses 71 are equal, so that the light converging effect can be achieved, and the manufacturing process can be simplified.
Alternatively, as shown in fig. 6, in a direction perpendicular to the plane of the planar area 20, i.e. the direction d, the perpendicular 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 twice the focal length of the convex lens 71.
Specifically, as shown in fig. 6, in a direction perpendicular to the plane of the planar area 20, 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 twice the focal length of the convex lens 71, and by this definition, on one hand, the thickness of the convex lens 71 along the plane of the vertical planar area 20 can be determined according to the vertical distance between the pixel light emitting layer 50 and the convex lens 71, and on the other hand, more light rays emitted by the pixel light emitting layer 50 can be converged after passing through the convex lens 71, so as to enhance the display brightness of the display panel in the first area 30.
Optionally, fig. 7 is another schematic structural diagram of the bending region 10 provided in the embodiment of the present application, please refer to fig. 7, in which the second light path converting portion 80 is a reflecting mirror 81, and an included angle is formed between the reflecting mirror 81 and a plane where the plane region 20 is located.
It should be noted that fig. 7 only schematically shows one arrangement of the mirrors 81, and alternatively, the spacing between any two adjacent mirrors 81 may be set to be equal.
Specifically, as shown in fig. 7 in combination with fig. 4, the second light path converting part 80 in the present embodiment is a reflector 81, the reflector 81 is disposed to reflect the light emitted from the pixel light emitting layer 50 of the second region 40, since the curved surface of the display panel in the second region 40 is an abrupt change region, the reflective mirror 81 needs to be disposed corresponding to the pixels of the pixel light-emitting layer 50 in the second region 40, the light emitted by the pixel light-emitting layer 50 in the second region 40 is emitted toward the bending central axis of the bending region 10, the reflector 81 is disposed at an angle α with respect to the plane of the planar area 20, which is beneficial to reflect as much light emitted from the pixel light-emitting layer 50 of the second area 40 as possible and then emit the reflected light in a direction perpendicular to the plane of the planar area 20, to overcome the difference in brightness caused by the radius of curvature of the second region 40 being smaller than the radius of curvature of the first region 30.
Alternatively, as shown in fig. 7, the distance between the orthogonal projections of the centers of the adjacent mirrors 81 on the plane of the planar area 20 increases along the direction from the first edge 41 to the second edge 42.
Specifically, as shown in fig. 7, in the direction pointing to the second edge 42 along the first edge 41 of the second region 40, as the curvature radius of the display panel 100 of the second region 40 gradually increases, that is, as the display panel of the second region 40 gradually changes from abrupt change to gradual change, the distance between the orthogonal projections of the centers of the adjacent reflectors 81 on the plane where the planar region 20 is located increases, so that as much light emitted by the pixel light emitting layers 50 of the second region 40 exits to the reflectors 81 as possible, and as much light emitted by the second region 40 exits in the direction perpendicular to the plane where the planar region 20 is located, so as to enhance the brightness of the second region 40.
Optionally, as shown in fig. 7, along the direction from the first edge 41 to the second edge 42, the included angles between the reflection mirror 81 and the plane of the planar area 20 are increased, and the included angles between the reflection mirror 81 and the plane of the planar area 20 are all smaller than 90°。
Specifically, as shown in fig. 7, the included angle α between the reflector 81 and the plane of the planar area 20 increases along the direction from the first edge 41 to the second edge 42, and the included angle between the light emitted from the pixel light-emitting layer 50 and the plane of the planar area 20 increases along the first edge due to the increasing curvature radius of the curved surface of the display panel 100 corresponding to the second area 4041 toward the second edge 42, the angle between the reflector 81 and the plane of the planar area 20 increases by α, and further, the angle between the light emitted from the pixel light-emitting layer 50 in the second area 40 and the plane of the planar area 20 is not greater than 90°Thus, the angle α between the mirror 81 and the plane of the planar area 20 is always smaller than 90°. With such an arrangement, the light emitted from the pixel light-emitting layer 50 in the second area 40 can be reflected as much as possible and then emitted in the direction perpendicular to the plane of the planar area 20.
Alternatively, and with continued reference to FIG. 7, each of the mirrors 81 is of equal size.
Specifically, as shown in fig. 7, the size of each of the reflectors 81 is equal, so that the manufacturing process can be simplified, and the size of the reflector 81 cannot be larger than the thickness of the light path conversion layer 60, so as to avoid that the light path conversion layer 60 cannot accommodate the reflector 81. Alternatively, the size of the reflector 81 may be adjusted according to the curvature of the curved surface of the display panel corresponding to the second region 40, and the reflector 81 may be manufactured in different sizes.
Optionally, fig. 8 is another schematic structural diagram of the bending region 10 provided in the embodiment of the present application, and please refer to fig. 8, where a vertical distance between the first light path converting part 70 and the pixel light emitting layer 50 is greater than a vertical distance between the second light path converting part 80 and the pixel light emitting layer 50.
Specifically, as shown in fig. 8, the vertical distance between the first light path converting part 70 and the pixel light emitting layer 50 is greater than the vertical distance between the second light path converting part 80 and the pixel light emitting layer 50, the first light path converting part 70 is used for collecting light, in order to avoid the light collected by the first light path converting part 70 from being scattered by more film layers, therefore, the farther the first light path converting part 70 is from the pixel light emitting layer 50, the better the second light path converting part 80 is used for deflecting the light, and therefore, the closer the second light path converting part 80 is to the pixel light emitting layer 50, the better the setting is, the display luminance difference between the first area 30 and the second area 40 relative to the plane area 20 can be better improved.
Optionally, as shown in fig. 8, the bending region 10 further includes a touch layer 90;
the first light path conversion part 70 is located on a 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.
Specifically, as shown in fig. 8, in the present embodiment, the bending area 10 further includes a touch layer 90, the first light path converting portion 70 is located on a side of the touch layer 90 away from the pixel light emitting layer 50, the second light path converting portion 80 is located on the light path converting layer 60, and the light path converting 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, so that the light emitted by the pixel light emitting layer 50 in the first area 30 is converged and then prevented from scattering as much as possible, and the light emitted by the pixel light emitting layer 50 in the second area 40 is deflected as much as possible and then emitted along a direction perpendicular to the plane where the plane area 20 is located, so that the display brightness of the bending area 10 and the plane area 20 is more uniform. In addition, when the reflecting mirror 81 is disposed at a longer distance from the pixel light emitting layer 50, the size of the reflecting mirror 81 and the pitch between adjacent reflecting mirrors 81 are more difficult to be disposed, which increases the difficulty of the process.
It should be noted that the bending region 10 further includes an encapsulation layer 91, and the first light path conversion portion 70 and the second light path conversion portion 80 may also be located on any one of the touch layer 90 and the encapsulation layer 91, or the light path conversion layer 60 may multiplex any one of the film layers between the pixel light emitting layer 50 and the cover plate, so as to achieve the purpose of changing the light path.
Alternatively, as shown in fig. 4, the pixel light emitting layer 50 includes a plurality of pixel units arranged in an array;
in the first region 30, the emergent light of n pixel units passes through the same first light path conversion part 70, wherein n is more than or equal to 1;
in the second region 40, the light emitted from m pixel cells passes through the same second optical path conversion portion 80, and m is equal to or greater than 1.
Specifically, as shown in fig. 4, the pixel light emitting layer 50 includes a plurality of pixel units arranged in an array, in the first area 30, the light emitted from n pixel units passes through the same first light path converting part 70, n is greater than or equal to 1, in the second area 40, the light emitted from m pixel units passes through the same second light path converting part 80, m is greater than or equal to 1, and the sizes of the first light path converting part 70 and the second light path converting part 80 are set according to the size of the pixel in the pixel light emitting layer 50 and the thickness of the film layer, so that the sizes of the first light path converting part 70 and the second light path converting part 80 can be flexibly controlled.
Optionally, fig. 9 is a schematic structural diagram of the display panel 100 according to an embodiment of the present disclosure, please refer to fig. 9, in which the bending region 10 includes two second regions 40, and the first region 30 is located between the two second regions 40.
Specifically, as shown in fig. 9, the bending area 10 includes two second areas 40, the first area 30 is located between the two second areas 40, the two second areas 40 are configured in the same structure, the bending area 10 is composed of two second areas 40 and one first area 30, and the two second areas 40 are connected to the planar area 20, so as to implement a complete folding state of the bending area 10, so that the display panels 100 of the planar area 20 can be attached to each other when folded, thereby saving space and being portable.
Based on the same inventive concept, fig. 10 is a schematic structural diagram of a display device 200 provided in the embodiments of the present application, please refer to fig. 10, the present application further provides a display device 200, the display device 200 includes a flexible display panel 100, and the flexible display panel 100 is the display device 100 provided in any of the embodiments of the present application, and repeated details are not repeated. The display device 200 provided by the present application may be: the mobile phone, the tablet computer, the display, the notebook computer, the digital photo frame, the navigator and other products or components with the photographing function, the touch function and the display function.
It should be noted that the embodiment shown in fig. 10 only schematically shows a relative position relationship diagram of the flexible display panel 100 and the display device 200, and does not represent an actual size.
According to the embodiments, the application has the following beneficial effects:
according to the flexible display panel and the display device provided by the application, according to the size of the curvature radius of the bending area, and dividing the bending area into a first area and a second area according to the vertical distance between the bending area and the plane of the display panel, arranging a first light path conversion part in the first area, the second light path conversion part is arranged in the second area, at least part of light emitted by the pixel light emitting layer in the first area can be converged by the first light path conversion part and then emitted to the light emitting surface of the display panel, at least part of light emitted by the pixel light emitting layer in the second area can be deflected by the second light path conversion part and then emitted to the light emitting surface of the display panel, and the light path conversion parts are respectively arranged according to the characteristics of the first area and the second area, so that the display brightness of the display panel in the first area and the display brightness of the display panel in the second area can be more effectively enhanced, and the uniformity of the display brightness of the display panel in the bending area and the display panel in the plane area.
The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.
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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