CN112289956A

CN112289956A - Display panel and display device

Info

Publication number: CN112289956A
Application number: CN202011180256.7A
Authority: CN
Inventors: 冷传利
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-01-29
Anticipated expiration: 2040-10-29
Also published as: CN112289956B

Abstract

The invention discloses a display panel and a display device, wherein the display panel comprises a substrate base plate; a light emitting layer on one side of the substrate base plate; the first film layer is positioned on one side of the light-emitting layer, which is far away from the substrate base plate; the display area comprises a folding area; the display panel is bent towards the light-emitting surface of the display panel in the bending state in the folding area; the folding area comprises a folding area edge, the folding area edge comprises a first edge and a second edge which are oppositely arranged along a first direction, and the first direction is parallel to the plane of the substrate base plate and is crossed with the extending direction of the bending shaft of the bending area; in the folding region, the first film layer comprises scattering particles; and in the direction pointing to the edge of the folding area along the center of the folding area, the folding area comprises a first area and a second area which are sequentially arranged, the density of the scattering particles in the first area is a first density, the density of the scattering particles in the second area is a second density, and the first density is smaller than the second density. The invention improves the optical difference between the folding area and the non-folding area caused by the crease generated by folding.

Description

Display panel and display device

Technical Field

The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.

Background

With the development of display technology, users have made various demands on the display panel. The foldable display panel is a foldable display device made of a soft material, has advantages of small size, portability, and the like, and is increasingly widely used in various fields.

Generally, a flexible material used in a foldable display panel has a certain bending strength, but when the bending strength exceeds the bending strength of the flexible material, the flexible display panel may be irreversibly deformed, for example, a crease, which may cause an optical difference between a folding area and a non-folding area, and affect the appearance and display effect of the display panel.

Disclosure of Invention

In view of the foregoing, the present invention provides a display panel and a display device for improving an optical difference between a folding area and a non-folding area caused by a crease generated by folding.

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

a substrate base plate;

the light-emitting layer is positioned on one side of the substrate base plate;

the first film layer is positioned on one side of the light-emitting layer, which is far away from the substrate base plate;

a display area comprising a fold area;

the display panel comprises a bending state, and the folding area bends towards the light emitting surface of the display panel in the bending state;

the folding area comprises a folding area edge, the folding area edge comprises a first edge and a second edge which are oppositely arranged along a first direction, and the first direction is parallel to the plane of the substrate base plate and is crossed with the extending direction of the bending axis of the bending area;

at the fold region, the first film layer comprises scattering particles; the folding region comprises a first region and a second region which are sequentially arranged along the direction that the center of the folding region points to the edge of the folding region, the density of the scattering particles in the first region is a first density, the density of the scattering particles in the second region is a second density, and the first density is smaller than the second density.

In another aspect, the invention discloses a display device comprising the display panel.

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

the display panel of the present invention includes a substrate base plate; a light emitting layer on one side of the substrate base plate; the first film layer is positioned on one side of the light-emitting layer, which is far away from the substrate base plate; the display area comprises a folding area; the display panel is bent towards the light-emitting surface of the display panel in the bending state in the folding area; the folding area comprises a folding area edge, the folding area edge comprises a first edge and a second edge which are oppositely arranged along a first direction, and the first direction is parallel to the plane of the substrate base plate and is crossed with the extending direction of the bending shaft of the bending area; in the folding region, the first film layer comprises scattering particles; and in the direction pointing to the edge of the folding area along the center of the folding area, the folding area comprises a first area and a second area which are sequentially arranged, the density of the scattering particles in the first area is a first density, the density of the scattering particles in the second area is a second density, and the first density is smaller than the second density. On the one hand, the light-emitting of luminescent layer enters into first rete, and including the scattering particle in the first rete, the light-emitting can jet out to each direction equivalent after the scattering takes place on the scattering particle surface, makes partly light in the light-emitting of luminescent layer deflect to normal visual angle direction through setting up the scattering particle, has realized improving like this from the vision because folding produce behind the crease the optical difference that causes folding district and non-folding district, improve display effect. On the other hand, the first density of the scattering particles in the first area is smaller than the second density of the scattering particles in the second area, and the scattering particles with different densities are arranged in different areas of the folding area, so that the quantity of light scattered in the positive viewing angle direction is different, the light emitting quantity in the positive viewing angle direction of the light emitting surface in the first area and the light emitting quantity in the positive viewing angle direction in the second area are approximately equal, the uniformity of light emitting of the first area and the second area in the folding area is ensured, the difference of the light emitting quantity corresponding to the first area and the second area in the folding area is improved, and the display effect is improved.

Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a cross-sectional view of a display panel provided in the prior art;

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

FIG. 3 is a structural diagram of a display panel according to the present invention in a bent state;

FIG. 4 is a cross-sectional view taken along line A-A' of FIG. 2;

FIG. 5 is a graph of the viewing angle luminance of a display panel according to the present invention;

FIG. 6 is a diagram illustrating a slope of a tangent line at the light-emitting surface of the display panel in the cross-sectional view of FIG. 4;

FIG. 7 is a schematic structural diagram of another display panel provided in the present invention;

FIG. 8 is a cross-sectional view taken along line B-B' of FIG. 7;

FIG. 9 is a schematic structural diagram of another display panel provided in the present invention;

FIG. 10 is a schematic structural diagram of another display panel provided in the present invention;

FIG. 11 is a further sectional view taken along line A-A' of FIG. 2;

FIG. 12 is a further sectional view taken along line A-A' of FIG. 2;

FIG. 13 is a schematic diagram of a display panel according to another embodiment of the present invention;

FIG. 14 is a cross-sectional view taken along line D-D' of FIG. 13;

fig. 15 is a schematic plan view of a display device according to an embodiment of the present invention.

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.

In view of the fact that when the bending strength of the foldable display panel in the prior art exceeds the bending strength of the flexible material, the flexible display panel may generate unrecoverable creases, and the creases may cause optical differences between the folding area and the non-folding area, thereby affecting the appearance and display effect of the display panel, the following research is performed on the display panel in the prior art by the inventors.

Referring to fig. 1, fig. 1 is a cross-sectional view of a display panel provided in the prior art, and a display panel 000 in fig. 1 is a cross-sectional view of the display panel 000 after the display panel 000 is restored from a bent state to a flattened state. The display panel 000 includes a folding area 01 and two non-folding areas 02 adjacent to the folding area 01, the display panel 000 includes a bending state, in the bending state, the folding area 01 bends toward the light-emitting surface 03 of the display panel 000, when the display panel 000 returns to the flat state, a fold 04 is formed on one side of the light-emitting surface 03 of the display panel 000 in the folding area 01, it can be seen from the cross-sectional view of fig. 1 that the light-emitting surface of the display panel 000 in the folding area 01 is an arc, and the light L1 'and the light L3' propagate perpendicular to the tangential direction of the arc, and form an included angle with the propagation direction of the light L0 'at the front viewing angle, so that the light emitted in the folding area 01 along the front viewing angle direction is less, and the light L2' propagates in the non-folding area 02 along the front viewing angle direction. The display panel is usually viewed from a front viewing angle direction by human eyes, so that the light of the folding area 01 is less than that of the non-folding area 02 when the display panel is viewed by human eyes, and the condition that the brightness of the folding area 01 is lower than that of the non-folding area 02 in vision can be formed, so that a dark stripe is formed in the folding area 01, and the display effect is influenced.

To this end, the present invention provides a display panel and a display device to solve the problem that the brightness of the folding area 01 is lower than that of the non-folding area 02, and specific embodiments of the display panel and the display device will be described in detail below.

Referring to fig. 2, 3, 4 and 6, fig. 2 is a schematic plan view of a display panel provided by the present invention, fig. 3 is a schematic structural view of a display panel provided by the present invention in a bent state, and fig. 4 is a cross-sectional view of fig. 6 taken along a-a' direction in fig. 2.

The display panel 100 in fig. 2 includes: a substrate base plate 11; a light emitting layer 12 on one side of the substrate 11; the first film layer 13 is positioned on one side of the light-emitting layer 12 far away from the substrate; a display area AA including a folding area 1;

the display panel 100 includes a bent state, referring to fig. 3, the folding area 1 is bent toward the light emitting surface 5 of the display panel AA in the bent state;

the folding zone 1 comprises a folding zone edge 30, the folding zone edge 30 comprises a first edge 31 and a second edge 32 which are oppositely arranged along a first direction X, and the first direction X is parallel to the plane of the substrate base plate 11 and is crossed with the extending direction of the bending axis 3 of the bending zone 1;

in the folding zone 1, the first film layer 13 comprises scattering particles 6; in a direction from the center 4 of the folding region to the edge 30 of the folding region, the folding region 1 includes a first region 1a and a second region 1b arranged in sequence, the density of the scattering particles 6 in the first region 1a is a first density, the density of the scattering particles 6 in the second region 1b is a second density, and the first density is smaller than the second density.

It is understood that the display area AA of the display panel 100 further includes the non-folding area 2 adjacent to the folding area 1. In the first direction X, the non-folding region 2 may be located on one side of the folding region 1, or the non-folding regions 2 may be located on both sides of the folding region 1, and in this embodiment, only the non-folding regions 2 are shown on both sides of the folding region 1, that is, the non-folding regions 2 are included on both sides of the folding region 1.

Fig. 2 and 3 only show the case where the scattering particles are arranged in the fold region 1 along the second direction X on the side of the fold region center 4, and further, the fold region center 4 in the present invention is the geometric center line of the fold region 1, and fig. 2 shows that the folding axis 3 and the fold region center 4 coincide.

It is to be understood that the display panel in the present invention may be an organic self-emitting display panel or an LED display panel, and certainly may also be a liquid crystal display panel, which is not limited herein. The substrate base 11, the light emitting layer 12, and the first film layer 13 are not pattern-filled in this embodiment. The first film layer 13 in the present invention may be any film layer on the side of the light emitting layer 12 away from the substrate 11, and is not particularly limited herein. In some alternative embodiments, the material of the first film layer 13 may include acrylic resin, polystyrene resin, styrene-acrylic copolymer resin, polyethylene resin, epoxy resin, silicone rubber, and a mixture thereof, and the material of the scattering particles may include silicon dioxide, titanium oxide, and the like.

Referring to fig. 4, the display panel 100 further includes a flat state, and the display panel 100 is repeatedly switched between the bent state and the flat state, that is, the display panel 100 is repeatedly bent, and a fold is formed in the folding area 1, and a first cross section is taken for the display panel 100, where the first cross section is perpendicular to a plane where the display panel 100 is located and parallel to the first direction X, in the first cross section, a light exit surface 5 of the display panel 100 located in the folding area 1 is an arc 6, and the arc 6 is a fold.

It should be noted that in the present embodiment, the first area 1a and the second area 1b are located on the side of the folding center 3 pointing to the first edge 31, or both the first area 1a and the second area 1b are located on the side of the folding center 3 pointing to the second edge 32, of course, the first area 1a and the second area 1b may also be located on both sides of the folding center 3 pointing to the edge 30 of the folding area, wherein the first area 1a is located on the side of the folding center 3 pointing to the first edge 31, and the second area 1b is located on the side of the folding center 3 pointing to the second edge 32, and the first area 1a is located on the side of the folding center pointing to the second edge 32, and the second area 1b is located on the side of the folding center 3 pointing to the first edge 31, it can be understood that the first density is smaller than the second density.

In fig. 4, the light emitting direction of the light L1 is the light emitting direction after the folding region 1 in the prior art generates the fold, and forms a certain included angle with the front viewing angle direction Y, and the included angle is generally large, so that the observer can hardly observe the light L1 in the front viewing angle direction Y.

In this embodiment, the light emitted from the light emitting layer 12 enters the first film layer 13, the first film layer 13 includes the scattering particles 6, the light emitted from the light emitting layer is scattered on the surface of the scattering particles 6 and then emitted in equal amounts in all directions, wherein the light having an angle between 0 ° and 10 ° with respect to the normal viewing angle direction Y can be observed by an observer, referring to fig. 5, fig. 5 is a graph of the viewing angle luminance of the display panel provided by the present invention, the abscissa is the viewing angle for observing the display panel, i.e., the angle with respect to the normal viewing angle direction, the ordinate is the luminance, the solid line corresponds to the folding region, the dotted line corresponds to the non-folding region, as can be seen from fig. 5, the luminance of the folding region is not substantially attenuated when the angle with respect to the normal viewing angle is between 0 ° and 10 °, the luminance of the folding region is attenuated when the angle with respect to the normal viewing angle is greater than 10 °, so that the angle between the light, the light can be ensured to be emitted in the normal visual angle range after being deflected, and the brightness is not influenced. As shown in fig. 4, light L2, light L3, and light L4 are provided with scattering particles 6, so that a part of light emitted from the light emitting layer 12 is deflected toward the normal viewing angle direction Y, and the deflected light forms an angle with the normal viewing angle Y, but the light with the angle between 0 ° and 10 ° can be observed by an observer, and the brightness is not attenuated, so that the optical difference between the folding region 1 and the non-folding region 2 caused by the folding to generate the fold is visually improved, and the display effect is improved.

In this embodiment, the first density of the scattering particles 6 in the first region 1a is less than the second density of the scattering particles 6 in the second region 1b, and the scattering particles 6 with different densities are arranged in different regions of the folding region, so that the quantity of light scattered in the front view direction is different, and the light output quantity in the front view direction Y of the light output surface 5 in the first region 1a and the second region 1b is substantially equal, so that the light output uniformity of the first region 1a and the second region 1b in the folding region 1 is ensured, the difference between the light output quantities corresponding to the first region 1a and the second region 1b in the folding region 1 is improved, and the display effect is improved. In some alternative embodiments, with continuing reference to fig. 4 and with reference to fig. 6, fig. 6 is a tangential slope distribution diagram of the light-emitting surface of the display panel in the cross-sectional view of fig. 4. In fig. 4, the display panel includes a flat state, the substrate 11 is in a first plane S in the flat state, a first included angle α 1 is formed between the light emitting surface 5 of the display panel in the first region 1a and the first plane S, a second included angle α 2 is formed between the light emitting surface 5 of the display panel in the second region 1b and the first plane S, and the first included angle α 1 is smaller than the second included angle α 2.

With reference to fig. 4 and fig. 6, the larger the angle between the light emitting surface 5 of the display panel and the first plane S, the larger the tangential slope of the position where the light L1 has the larger angle with the normal viewing angle direction Y, the more the light L1 has to be scattered in the normal viewing angle direction Y, the larger the angle between the light emitting surface 5 of the display panel and the first plane S, the greater the density of the scattering particles 6, and conversely, the smaller the tangential slope of the position where the angle between the light emitting surface 5 of the display panel and the first plane S has to be, the smaller the angle between the light L1 and the normal viewing angle direction Y is, the less the light L1 has to be scattered in the normal viewing angle direction Y, and the smaller the angle between the light emitting surface 5 of the display panel and the first plane S is, the smaller the density of the scattering particles 6 is.

In this embodiment, a first included angle α 1 between the light emitting surface 5 of the display panel in the first region 1a and the first plane S is smaller than a second included angle α 2 between the light emitting surface 5 of the display panel in the second region 1b and the first plane S, so that a first density of the scattering particles 6 in the first region 1a is smaller than a second density of the scattering particles 6 in the second region 1b, and the scattering particles 6 with different densities are disposed at different positions of the light emitting surface 5 of the display panel, which are different from the included angle of the first plane S, so that the quantity of light scattered in the positive viewing angle direction is different, and the quantity of light emitted in the positive viewing angle direction Y from the light emitting surface 5 in the first region 1a and the second region 1b is substantially equal, so that the light emitted from the first region 1a and the second region 1b in the folding region 1 is uniform, and the difference between the light emitted quantities corresponding to the first region 1a and the second region 1b in the folding region 1, the display effect is improved.

It is understood that, referring to fig. 6, the distribution of the slope of the tangent at each point on the arc 6 (fold) is shown in fig. 6, and it can be seen that the region from the center of the folding zone (point O in fig. 6) to the first edge 31 in the bending zone includes a region Z1 where the slope of the tangent gradually increases and a region Z2 where the slope of the tangent gradually decreases, and the region from the center of the folding zone (point O in fig. 6) to the second edge 32 includes a region Z3 where the slope of the tangent gradually increases and a region Z4 where the slope of the tangent gradually decreases, and of course, the slopes at the center of the folding zone and at the intersection of the folding zone 1 and the non-bending zone 2 are both 0. In the embodiment shown, the second zone 1b is located in the zone Z1 where the slope of the tangent line gradually increases, while the first zone 1a is located in the zone Z1 where the slope of the tangent line gradually increases and the zone Z2 where the slope of the tangent line gradually decreases, but the slope of the tangent line at each point on the fold in the first zone 1a is greater than the slope of the tangent line at each point on the fold in the second zone 1 b. It will be understood that the slope of the tangent line at each point on the fold in the first region 1a is greater than the slope of the tangent line at each point on the fold in the second region 1 b.

As is clear from fig. 4 and 6, the larger the tangential slope is at the position of the angle between the light ray L1 and the normal viewing angle direction Y, the more the light rays need to be scattered in the normal viewing angle direction Y, and the greater the tangential slope is at the position, the greater the density of the scattering particles 6 is, whereas the smaller the tangential slope is, the smaller the angle between the light ray L1 and the normal viewing angle direction Y is, the less the light rays need to be scattered in the normal viewing angle direction Y, and the smaller the tangential slope is at the position, the smaller the density of the scattering particles 6 is.

It can be understood that the tangential slope corresponding to the first region 1a is smaller than the tangential slope corresponding to the second region 1b, so that the first density of the scattering particles 6 in the first region 1a is smaller than the second density of the scattering particles 6 in the second region 1b, and the scattering particles 6 with different densities are arranged in the regions corresponding to different tangential slopes, so that the quantity of light scattered in the positive viewing angle direction is different, it is ensured that the light output amounts in the positive viewing angle direction Y of the light output surface 5 in the first region 1a and the second region 1b are substantially equal, it is ensured that the light output from the first region 1a and the second region 1b in the folding region 1 is uniform, the difference between the light output amounts corresponding to the first region 1a and the second region 1b in the folding region 1 is improved, and the display effect is improved.

In some alternative embodiments, referring to fig. 7 and 8 and with continued reference to fig. 6, fig. 7 is a schematic structural diagram of another display panel provided by the present invention, and fig. 8 is a cross-sectional view along direction B-B' in fig. 7. The folding region 1 further comprises a third region 1c, the third region 1c is located on a side of the second region 1b away from the first region 1a, and the density of the scattering particles 6 in the third region 1c is a third density, which is smaller than the second density.

The fold region 1 of fig. 7 further comprises a third region 1c on the side of the second region 1b remote from the first region 1a, and the third density of scattering particles 6 in the third region 1c is also smaller than the density of scattering particles in the second region 1 b.

Referring to fig. 6, the tangent slope of each point corresponding to the fold in the third region 1c is smaller than that of each point corresponding to the fold in the second region 1b, as described above, the larger the tangent slope is, the larger the angle between the outgoing light and the normal viewing angle direction Y at each position is, so that the more light rays need to be scattered in the normal viewing angle direction Y are, the larger the density of the scattering particles 6 is correspondingly, and conversely, the smaller the tangent slope is, the smaller the angle between the outgoing light and the normal viewing angle direction Y at each position is, so that the less light rays need to be scattered in the normal viewing angle direction Y is, and the smaller the density of the scattering particles 6 is correspondingly. The tangential slope of each point of the crease in the third region 1c is smaller than that of each point of the crease in the second region 1b, so that fewer light rays need to be scattered in the normal viewing angle direction Y, at the moment, the third density of the scattering particles 6 in the third region 1c is also smaller than that of the scattering particles in the second region 1b, and the scattering particles 6 with different densities are arranged in regions corresponding to different tangential slopes, so that the quantity of the light rays scattered in the normal viewing angle direction is different, the light output quantity in the normal viewing angle direction Y of the light output surface 5 in the third region 1c and the second region 1b is ensured to be approximately equal, the light output uniformity of the third region 1c and the second region 1b in the folding region 1 is ensured, the light output quantity difference corresponding to the third region 1c and the second region 1b in the folding region 1 is improved, and the display effect is improved.

In some alternative embodiments, referring to fig. 9, fig. 9 is a schematic structural diagram of another display panel provided in the present invention. Fig. 9 shows a case where scattering particles are arranged in the folding zone 1 on both sides of the centre 4 of the folding zone in the second direction X. The region from the center 4 of the folding region to the first edge 31 and the region from the center 4 of the folding region to the second edge 32 are both provided with scattering particles, so that the light emission in the front viewing angle direction Y can be increased in both the region from the center 4 of the folding region to the first edge 31 and the region from the center 4 of the folding region to the second edge 32, and thus, the optical difference between the folding region 1 and the non-folding region 2 caused by the crease generated by folding can be better improved in view, and the display effect is improved.

In some alternative embodiments, with continued reference to fig. 2-6, the refractive index of the scattering particles 6 in the first region 1a is less than the refractive index of the scattering particles 6 in the second region 1 b.

As can be seen from fig. 4 and fig. 6, the larger the position of the tangent slope is, the larger the included angle between the light ray L1 and the normal viewing angle direction Y is, the larger the degree of deflection of the light ray L1 to the normal viewing angle direction Y is, the larger the refractive index of the scattering particles 6 corresponding to the position of the tangent slope is, the more beneficial the light ray to the normal viewing angle direction Y is, otherwise, the smaller the position of the tangent slope is, the smaller the included angle between the light ray L1 and the normal viewing angle direction Y is, the smaller the degree of deflection of the light ray L1 to the normal viewing angle direction Y is, the smaller the refractive index of the scattering particles 6 corresponding to the position of the tangent slope is, and the smaller the degree of deflection of the light ray L1 to the.

In this embodiment, the refractive index of the scattering particles 6 in the first region 1a is smaller than the refractive index of the scattering particles 6 in the second region 1b, and the degree of the light beam deflection in the first region 1a to the normal viewing angle direction Y is smaller than the degree of the light beam deflection in the second region 1b to the normal viewing angle direction Y, so as to ensure that the light beams in the first region 1a and the second region 1b are emitted along the normal viewing angle direction Y, thereby improving the difference of the light beams corresponding to the first region 1a and the second region 1b in the folding region 1, and improving the display effect.

In some alternative embodiments, referring to fig. 10 and fig. 6, fig. 10 is a schematic structural diagram of another display panel provided by the present invention, and in fig. 10, an average particle size of the scattering particles 6 in the first region 1a is larger than an average particle size of the scattering particles in the second region.

It can be understood that, with reference to fig. 6, in order to ensure that the first region 1a and the second region 1b in the folding region 1 emit light uniformly, more light needs to be scattered in the second region 1b than in the first region 1a, so as to ensure that the light emitting amount in the second region 1b is substantially equal to the light emitting amount in the first region 1a, and when the average particle size of the scattering particles 6 in the first region 1a is larger than the average particle size of the scattering particles in the second region, it can further ensure that the light emitting from the light emitting layer 12 enters the scattering particles 6 approximately and is scattered, so as to ensure that the light emitting amounts in the normal viewing angle direction Y of the light emitting surfaces 5 in the first region 1a and the second region 1b are substantially equal, so as to ensure that the light emitting from the first region 1a and the second region 1b in the folding region 1 is uniform, and improve the difference between the light emitting amounts corresponding to the first region 1a and the second region 1b in the folding region 1, the display effect is improved.

In some alternative embodiments, with continued reference to fig. 9 and 6, the folding zone 1 comprises a central region 1d, the central region 1d being located on a side of the first region 1a remote from the second region 1b, the central region 1d covering the folding zone center 4, and the scattering particles do not overlap the light-emitting layer in the central region 1d in a direction perpendicular to the plane of the substrate base.

Fig. 9 shows a case where scattering particles are arranged in the folding zone 1 on both sides of the centre 4 of the folding zone in the second direction X.

In this embodiment, no scattering particles are disposed in the central region 1d of the folding region 1, and as can be seen from fig. 6, the slope of the tangent line in the central region 1d is 0, which means that the light ray propagates along the normal viewing angle direction when passing through the central region, if the scattering particles are disposed in the central region 1d, the light ray originally propagating along the normal viewing angle direction is scattered, and the light output along the normal viewing angle direction is reduced, so that the scattering particles 6 do not need to be disposed in the central region 1 d. The width of the central region 1d in the first direction X is related to the bending radius, and for example, in the case of a normal display panel bent at a bending radius of 0.5mm, the width of the central region 1d in the first direction X is about 0.1 to 0.3 mm.

In this embodiment, the display panel is in a flat state, and in a direction perpendicular to the plane of the substrate, the scattering particles do not overlap with the central region 1d, that is, the scattering particles 6 are not disposed in the central region 1d, and since the tangent slope of the fold in the central region 1d is 0, light propagates in the normal viewing angle direction when passing through the central region, the scattering particles 6 do not need to be disposed.

In some alternative embodiments, referring to fig. 11, fig. 11 is a cross-sectional view taken along a-a' direction in fig. 2, the display panel 100 further includes a color-resist layer CF on a side of the light-emitting layer 12 away from the substrate 11, and the color-resist layer DF is multiplexed as the first film layer 13.

The display panel 100 in this embodiment may be a liquid crystal display panel, and the liquid crystal display panel includes a color resist layer CF, and in this embodiment, the scattering particles 6 are manufactured by using an original film layer of the display panel 100, so that the manufacturing process can be simplified.

In some alternative embodiments, referring to FIG. 12, FIG. 12 is a further cross-sectional view taken along line A-A' of FIG. 2. The display panel further includes: the packaging layer FZ is positioned on one side of the light-emitting layer 12 far away from the substrate 11 and comprises an organic packaging layer FZ 1; the optical adhesive layer OCA is positioned on one side, far away from the substrate base plate 11, of the packaging layer FZ; the first film layer comprises at least one of an organic packaging layer FZ1 and an optical adhesive layer OCA.

Fig. 12 shows a case where the scattering particles are provided in both the organic encapsulation layer FZ1 and the optical adhesive layer OCA, but the scattering particles may be provided only in the organic encapsulation layer FZ1 or the optical adhesive layer OCA. It should be noted that the encapsulation layer may further include an inorganic encapsulation layer (not shown in the figure), where the inorganic encapsulation layer includes a first inorganic encapsulation layer and a second inorganic encapsulation layer, the first inorganic encapsulation layer is located on the side of the organic encapsulation layer FZ1 close to the substrate 11, and the second inorganic encapsulation layer is located on the side of the organic encapsulation layer FZ1 away from the substrate. The optical cement layer OCA is used for bonding the display panel and a cover plate for protecting the display panel.

The display panel 100 in this embodiment may be an organic self-luminous display panel, and it can be understood that when the display panel is an organic self-luminous display panel, the light emitting device of the display panel needs to be packaged, and an encapsulation layer is generally used for packaging to prevent water and oxygen from corroding the light emitting device. The organic self-luminous display panel comprises an encapsulation layer FZ positioned on one side of a luminous layer 12 far away from a substrate 11, wherein the encapsulation layer FZ comprises an organic encapsulation layer FZ 1; in the present embodiment, the original film layer of the display panel 100 is used as the first film layer 13, and the scattering particles 6 are formed on the organic encapsulation layer FZ1 and/or the optical adhesive layer OCA, so that the manufacturing process can be simplified.

In some alternative embodiments, referring to fig. 13 and 14, fig. 13 is a schematic plan view of a display panel according to still another embodiment of the present invention, and fig. 14 is a cross-sectional view taken along direction D-D' of fig. 13. The display area AA further comprises a non-folding area 2, the non-folding area 2 being located on at least one side of the folding area 1 along the first direction X;

the light-emitting layer 12 includes a plurality of sub-pixels P0;

the array layer 15 is positioned on one side of the light-emitting layer 12 close to the substrate 11, the array layer 15 comprises a driving transistor 16, and the driving transistor 16 is electrically connected with the sub-pixel P0 and is used for driving the sub-pixel P0 to emit light; the driving transistor 16 includes a first transistor 161 located in the folding region 1 and a second transistor 162 located in the non-folding region 2, a color of a sub-pixel P0 electrically connected to the first transistor 161 is the same as a color of a sub-pixel P0 electrically connected to the second transistor 162, and a width-to-length ratio of the first transistor 161 is greater than a width-to-length ratio of the second transistor 162.

Fig. 13 shows only the non-folded region 2 adjacent to the first edge 31, but of course the non-folded region 2 may be adjacent to only the second edge 32, or of course the non-folded region 2 may be adjacent to both the first edge 31 and the second edge 32, as described with reference to fig. 2.

The array layer 15 is only schematically shown in fig. 14 to include the driving transistor 16, and of course only one first transistor 161 and one second transistor 162 are shown. Only one first transistor 161 is schematically shown in the figure corresponding to the number of scattering particles 6.

It should be noted that, in the present invention, when the light is scattered by the scattering particles 6, the light in the folding region 1 is deflected to the positive viewing angle direction Y, but at the same time, the light in the original positive viewing angle direction is refracted to a large viewing angle, so that the luminance of the folding region 1 is slightly darker than that of the non-folding region 2, and therefore, for the sub-pixels of the same color, the width-to-length ratio of the first transistor 161 corresponding to the folding region 1 is larger than that of the second transistor 162 located in the non-folding region 2, and since the width-to-length ratio of the driving transistor is proportional to the driving capability of the driving transistor to the sub-pixel P0 connected thereto, the larger the width-to-length ratio, the larger the driving capability of the driving transistor is, the luminance of the sub-pixel P0 in the folding region 1 can be improved, so that the luminance of the sub.

In some alternative embodiments, with continued reference to fig. 13 and 14, the display area AA further comprises an unfolded region 2 adjacent to the first edge 31 and/or the second edge 32;

the light emitting layer 12 includes a plurality of sub-pixels P0, the sub-pixel P0 includes a first sub-pixel P1 located in the folding area 1 and a second sub-pixel P2 located in the non-folding area 2, the display panel 100 includes a first data line DA1 supplying a data voltage to the first sub-pixel P1 of the folding area 1, a second data line DA2 supplying a data voltage to the second sub-pixel P2 of the non-folding area 2, and the first sub-pixel P1 and the second sub-pixel P2 emit light of the same color; when the first and second sub-pixels P1 and P2 display the same gray scale, the data voltage supplied from the first data line DA1 is greater than the data voltage supplied from the second data line DA 2.

As described above, in the present invention, when the light is scattered by the scattering particles 6, the light in the folding region 1 is deflected to the positive viewing angle direction Y, but at the same time, the light in the original positive viewing angle direction is refracted to a large viewing angle, so that the brightness of the folding region 1 is slightly darker than that of the non-folding region 2, and therefore, when the first subpixel P1 and the second subpixel P2 display the same gray scale for the same color subpixel, the data voltage provided by the first data line DA1 is greater than that provided by the second data line DA2, and the brightness of the subpixel P0 in the folding region 1 can be increased, so that the brightness of the folding region 1 is the same as that of the non-folding region 2.

In some alternative embodiments, please refer to fig. 15, fig. 15 is a schematic plan view illustrating a display device according to an embodiment of the present invention, and the display device 200 according to the embodiment includes the display panel 100 according to the above embodiment of the present invention. The embodiment of fig. 15 is only an example of a mobile phone, and the display device 200 is described, it is understood that the display device 200 provided in the embodiment of the present invention may be another display device 200 having a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device 200 provided in the embodiment of the present invention has the beneficial effects of the display panel 100 provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel 100 in the foregoing embodiments, and the detailed description of the embodiment is not repeated herein.

As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following beneficial effects:

the display panel of the present invention includes a substrate base plate; a light emitting layer on one side of the substrate base plate; the first film layer is positioned on one side of the light-emitting layer, which is far away from the substrate base plate; the display area comprises a folding area; the display panel is bent towards the light-emitting surface of the display panel in the bending state in the folding area; the folding area comprises a folding area edge, the folding area edge comprises a first edge and a second edge which are oppositely arranged along a first direction, and the first direction is parallel to the plane of the substrate base plate and is crossed with the extending direction of the bending shaft of the bending area; in the folding region, the first film layer comprises scattering particles; and in the direction pointing to the edge of the folding area along the center of the folding area, the folding area comprises a first area and a second area which are sequentially arranged, the density of the scattering particles in the first area is a first density, the density of the scattering particles in the second area is a second density, and the first density is smaller than the second density. On the one hand, the light-emitting of luminescent layer enters into first rete, and including the scattering particle in the first rete, the light-emitting can jet out to each direction equivalent after the scattering takes place on the scattering particle surface, makes partly light in the light-emitting of luminescent layer deflect to normal visual angle direction through setting up the scattering particle, has realized improving like this from the vision because folding produce behind the crease the optical difference that causes folding district and non-folding district, improve display effect. On the other hand, the first density of the scattering particles in the first area is smaller than the second density of the scattering particles in the second area, and the scattering particles with different densities are arranged in different areas corresponding to the folding area, so that the quantity of light scattered in the positive viewing angle direction is different, the light outgoing amount in the positive viewing angle direction of the light outgoing surface in the first area and the light outgoing amount in the second area are approximately equal, the uniform light outgoing of the first area and the second area in the folding area are ensured, the difference of the light outgoing amount corresponding to the first area and the second area in the folding area is improved, and the display effect is improved.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A display panel, comprising:

a substrate base plate;

the light-emitting layer is positioned on one side of the substrate base plate;

a display area comprising a fold area;

2. The display panel according to claim 1, wherein the folding region further comprises a third region on a side of the second region away from the first region, and wherein the density of the scattering particles in the third region is a third density, and wherein the third density is lower than the second density.

3. The display panel according to claim 1, wherein the display panel comprises a flat state, the substrate is in a first plane in the flat state, a first included angle is formed between the light emitting surface of the display panel and the first plane in the first region, a second included angle is formed between the light emitting surface of the display panel and the first plane in the second region, and the first included angle is smaller than the second included angle.

4. The display panel according to claim 1, wherein a refractive index of the scattering particles in the first region is smaller than a refractive index of the scattering particles in the second region.

5. The display panel according to claim 1, wherein an average particle size of the scattering particles in the first region is larger than an average particle size of the scattering particles in the second region.

6. The display panel according to claim 1, wherein the folding area comprises a central region located on a side of the first region away from the second region, the central region covering a center of the folding area, and wherein the scattering particles do not overlap with the light emitting layer in a direction perpendicular to a plane of the substrate base plate.

7. The display panel according to claim 1, further comprising a color resistance layer on a side of the light-emitting layer away from the substrate base plate, the color resistance layer being multiplexed as the first film layer.

8. The display panel according to claim 1, further comprising:

the packaging layer is positioned on one side, far away from the substrate, of the light-emitting layer and comprises an organic packaging layer;

the optical adhesive layer is positioned on one side of the packaging layer, which is far away from the substrate base plate;

the first film layer comprises at least one of an organic packaging layer and an optical adhesive layer.

9. The display panel according to claim 1, wherein the display region further comprises an unfolded region located on at least one side of the folded region in the first direction;

the light emitting layer includes a plurality of sub-pixels;

the array layer is positioned on one side, close to the substrate, of the light emitting layer and comprises a driving transistor, the driving transistor is electrically connected with the sub-pixel and used for driving the sub-pixel to emit light, the driving transistor comprises a first transistor positioned in the folding area and a second transistor positioned in the non-folding area, the color of the sub-pixel electrically connected with the first transistor is the same as the color of the sub-pixel electrically connected with the second transistor, and the width-length ratio of the first transistor is larger than that of the second transistor.

10. The display panel according to claim 1,

the display area further comprises a non-folded area adjacent to the first edge and/or the second edge;

the light emitting layer includes a plurality of sub-pixels including a first sub-pixel located in the folding region and a second sub-pixel located in the non-folding region; the display panel comprises a first data line for providing data voltage for a first sub-pixel of the folding area and a second data line for providing data voltage for a second sub-pixel of the non-folding area, and the first sub-pixel and the second sub-pixel emit light with the same color; when the first sub-pixel and the second sub-pixel display the same gray scale, the data voltage provided by the first data line is greater than the data voltage provided by the second data line.

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