CN217361029U - Display panel and display device - Google Patents

Abstract

The embodiment of the utility model discloses display panel and display device. The display panel includes, characterized by comprising: the display screen body is positioned on the surface of the supporting layer; the display screen body comprises a first non-bending part, a second non-bending part and a bending part, wherein the bending part is positioned between the first non-bending part and the second non-bending part; the supporting layer comprises a first non-bending supporting part, a second non-bending supporting part and a bending supporting part, the first non-bending supporting part is used for supporting the first non-bending part, the second non-bending supporting part is used for supporting the second non-bending part, and the bending supporting part is used for supporting the bending part; the bending support part comprises a lamination of at least two sub-support layers stacked along the thickness direction of the display panel. The embodiment of the utility model provides a technical scheme has reduced the crease that display panel and display device produced after buckling.

Description

Display panel and display device

Technical Field

The embodiment of the utility model provides a relate to the semiconductor technology field, especially relate to a display panel and display device.

Background

With the development of display technologies, the foldable display device is more and more widely applied to display devices such as smart phones, tablet computers and notebook computers.

In the preparation and use processes of the folding display device, the shell can drive the display panel to be bent. The prior folding display device has obvious crease after being bent.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a display panel and a display device, so as to reduce the folding mark generated after the display panel and the display device are bent.

An embodiment of the utility model provides a display panel, include: the display screen body is positioned on the surface of the supporting layer;

the display screen body comprises a first non-bending part, a second non-bending part and a bending part, and the bending part is positioned between the first non-bending part and the second non-bending part;

the supporting layer comprises a first non-bending supporting part, a second non-bending supporting part and a bending supporting part, the first non-bending supporting part is used for supporting the first non-bending part, the second non-bending supporting part is used for supporting the second non-bending part, and the bending supporting part is used for supporting the bending part;

the bending support part comprises a lamination of at least two sub-support layers stacked along the thickness direction of the display panel.

This technical scheme, the supporting part of buckling includes the stromatolite of two at least layers of sub-supporting layer, compares the supporting part of buckling of single-layer construction in traditional structure, and the thickness of each layer of sub-supporting layer all is less than the whole thickness of the supporting part of buckling. After the display panel is bent, the plastic deformation of each sub supporting layer is smaller than that of the bending supporting part of the single-layer structure, the degree of plastic deformation, which cannot be recovered by oneself, of the bending supporting part after the bending is reduced, the bending performance of the bending supporting part and the good deformation recovery capability after the bending are enhanced, and then creases generated after the bending of the display panel are reduced.

Optionally, the bending support portion includes an intermediate bending portion, a first edge bending portion and a second edge bending portion, the intermediate bending portion is located between the first edge bending portion and the second edge bending portion, the first edge bending portion is disposed adjacent to the first non-bending support portion, and the second edge bending portion is disposed adjacent to the second non-bending support portion;

the number of layers of the sub-supporting layers in the middle bending part is greater than that of the sub-supporting layers in the first edge bending part;

the number of layers of the sub-supporting layers in the middle bending part is larger than that of the sub-supporting layers in the second edge bending part.

According to the technical scheme, the deformation recovery capability of the middle bending part after being bent is superior to that of the first edge bending part and the second edge bending part, the bending performance of the middle bending part is superior to that of the first edge bending part and that of the second edge bending part, and the reduction of creases generated by the display panel after being bent is facilitated.

Optionally, the sub-support layer is provided with at least one through hole;

preferably, the aperture ratio of the sub-support layer is less than or equal to 70%.

According to the technical scheme, the area of each layer of the sub-supporting layer is reduced, the degree of plastic deformation which cannot be recovered automatically and is generated after each layer of the sub-supporting layer is bent is reduced, the bending performance of the bending supporting part and the deformation recovery capability after bending are enhanced, and then the crease of the display panel after bending is further reduced.

Preferably, if the aperture ratio of the sub-supporting layer is too large and is greater than 70%, the supporting performance of the bending supporting portion may be poor, and after the bending portion of the display screen returns to the flat state from the bending state, the bending portion of the display screen may wrinkle, and then plastic deformation that cannot be recovered may be generated. Therefore, the aperture ratio of the sub-supporting layer is less than or equal to 70%, the supporting performance of the bending supporting portion is improved, the situation that the bending portion of the display screen body is folded after the bending portion of the display screen body returns to the flat state from the bending state is avoided, and the reduction of creases generated after the display panel is bent is facilitated.

Optionally, the bending support portion includes an intermediate bending portion, a first edge bending portion and a second edge bending portion, the intermediate bending portion is located between the first edge bending portion and the second edge bending portion, the first edge bending portion is disposed adjacent to the first non-bending support portion, and the second edge bending portion is disposed adjacent to the second non-bending support portion;

the aperture ratio of the intermediate bend is greater than the aperture ratio of the first edge bend;

the aperture ratio of the middle bending part is greater than the aperture ratio of the second edge bending part.

According to the technical scheme, the deformation recovery capability of the middle bending part after being bent is superior to that of the first edge bending part and the second edge bending part, the bending performance of the middle bending part is superior to that of the first edge bending part and the second edge bending part, and the reduction of creases generated by the display panel after being bent is facilitated.

Optionally, orthographic projections of the display screen body in the flattened state of the through holes located in different sub-supporting layers are not overlapped.

This technical scheme, the through-hole that is located different sub-supporting layers is in the orthographic projection of the display screen body under the exhibition flat state and is not overlapped, has improved the support performance of the supporting part of buckling, has avoided the kink of the display screen body to get back to the exhibition flat state back from the state of buckling, and the condition of fold appears in the kink of the display screen body helps reducing the crease that display panel produced after buckling.

Optionally, the sub-support layers are of the same thickness.

Preferably, the thickness of the sub-support layer is greater than or equal to 30 micrometers.

The thickness of this technical scheme's sub-supporting layer is the same, can divide into the supporting part that buckles on average and predetermine the number of piles, alright in order to realize eliminating the technological effect that the crease that produces after display panel buckles, reduced the design degree of difficulty of the supporting part of buckling.

Preferably, the thickness of the sub-support layer is greater than or equal to 30 micrometers. The thickness of the sub-supporting layer of the technical scheme is too small, so that when the thickness is smaller than the micrometer, the supporting capability of the sub-supporting layer is poor, and the folding condition of the bending part of the display screen body is easy to occur. Therefore, the thickness of the sub-supporting layer is larger than or equal to the micrometer, so that the good bending performance and the good deformation recovery capability after bending can be realized, the good supporting capability can be realized, the poor supporting capability of the sub-supporting layer is avoided, the condition that the bending part of the display screen body is folded is easily caused, and the reduction of the crease generated after bending of the display panel is facilitated.

Optionally, a first adhesive layer is further included, and the first adhesive layer is positioned between at least one group of adjacent sub-support layers;

preferably, the thicknesses of the sub-support layers are the same;

the thickness of the first adhesive layer is greater than or equal to the thickness of the sub-support layer.

Preferably, the thickness of the first adhesive layer is between 1.1 and 1.2 times the thickness of the sub-support layer.

According to the technical scheme, the first bonding layer can increase the bonding degree between the sub-supporting layers, and on the other hand, the elasticity of the first bonding layer and the deformation recovery capability after bending are superior to those of the sub-supporting layers, so that the bending performance of the bending supporting part is enhanced, and further, the crease generated after bending of the display panel is reduced. And when the display panel is in a bent state, the first bonding layer can enter the through holes of the sub-supporting layer, so that the plastic deformation of the sub-supporting layer is further reduced, and the crease marks generated after the display panel is bent are further reduced.

Preferably, the sub-support layers are the same thickness; the thickness of sub-supporting layer and tie coat is the same, can be used for placing sub-supporting layer and tie coat respectively with the even number of predetermineeing that divides into of the supporting part of buckling, alright in order to realize eliminating the technological effect of the crease that display panel produced after buckling, reduced the design degree of difficulty of the supporting part of buckling.

Preferably, the thickness of the first adhesive layer is greater than that of the sub-supporting layer, so that the bending performance of the bending supporting portion is further enhanced, and further, the crease generated after the display panel is bent is further reduced.

Optionally, the at least two layers of sub-supporting layers are connected to the first non-bending supporting part and the second non-bending supporting part;

or the at least two sub-support layers are divided into a first sub-support layer group and a second sub-support layer group, the first sub-support layer group comprises at least one sub-support layer, and the second sub-support layer group comprises at least one sub-support layer; the sub-supporting layer of the first sub-supporting layer group is connected with the second non-bending supporting part, and the sub-supporting layer of the second sub-supporting layer group is connected with the first non-bending supporting part.

The stromatolite of the at least two-layer sub-supporting layer that this technical scheme's the supporting part of buckling included all links to each other with first non-supporting part of buckling and the non-supporting part of buckling of second, and sub-supporting layer and first non-supporting part of buckling and the non-supporting part of buckling of second are a whole rete, and when display panel got back to the exhibition flat state from the state of buckling, the kink of the display screen body was difficult to appear the fold, and then helps reducing the crease that display panel produced after buckling.

Or, specifically, the sub-support layer of the first sub-support layer group is connected to the second non-bending support portion, and the sub-support layer of the second sub-support layer group is connected to the first non-bending support portion, so that the sub-support layer of the first sub-support layer group is prevented from transmitting the plastic deformation to the first non-bending support portion, and the sub-support layer of the second sub-support layer group is prevented from transmitting the plastic deformation to the second non-bending support portion, thereby further reducing the crease mark generated after the display panel is bent.

Optionally, the display panel further includes a first fixing portion and a second fixing portion, the first fixing portion is located in a region of the first non-bending supporting portion adjacent to the bending supporting portion, and the first fixing portion is connected to the first non-bending supporting portion; the second fixing part is positioned in the area of the second non-bending supporting part adjacent to the bending supporting part, and the second fixing part is connected with the second non-bending supporting part;

preferably, the display panel further includes a second adhesive layer, and the first fixing portion and the first non-bending supporting portion are connected by the second adhesive layer;

the second fixing portion and the second non-bending supporting portion are connected through the second adhesive layer.

Among this technical scheme, first fixed part has increased the area of contact of first non-bending support portion and casing for increase the firmness of first non-bending support portion and casing, the second fixed part has increased the area of contact of second non-bending support portion and casing, be used for increasing the firmness of second non-bending support portion and casing, and then avoid display panel to produce the fold after buckling, and then help reducing the crease that display panel produced after buckling.

The embodiment of the utility model provides a still provide a display device, include: a housing including a first rotating plate, a second rotating plate, and a rotating structure;

a spacing area is arranged between the first rotating plate and the second rotating plate;

the rotating structure is positioned in the spaced area and is used for driving the first rotating plate and the second rotating plate to rotate relatively;

a display panel according to any of the above technical solutions, wherein a first non-bending support portion of the display panel is located on a surface of the first rotating plate, a second non-bending support portion of the display panel is located on a surface of the second rotating plate, and a bending support portion of the display panel is located in the spacing area;

the rotating structure and the orthographic projection of the display panel on the shell are not overlapped.

According to the technical scheme, the display panel comprises the display panel body, the rotating structure is located in the interval area and used for driving the first rotating plate and the second rotating plate to rotate relatively, and then the display panel body is driven to be switched between the bending state and the flattening state. The bending support part of the display panel comprises at least two layers of laminated sub-support layers, and compared with the bending support part with a single-layer structure in the traditional structure, the thickness of each layer of sub-support layer is smaller than the whole thickness of the bending support part. After the display panel is bent, the plastic deformation of each sub-supporting layer is smaller than that of the bent supporting part with the single-layer structure, the degree of plastic deformation of the bent supporting part which cannot be recovered by self after bending is reduced, the bending performance of the bent supporting part and the good deformation recovery capability after bending are enhanced, and then the crease marks generated after bending of the display device are reduced. And in the display device, the rotating structure and the orthographic projection of the display panel on the shell are not overlapped, the display device which is positioned on the orthographic projection of the display panel on the shell and is overlapped relative to the rotating structure is provided, and the rotating structure can not be contacted with the display panel no matter in a flattening state or a bending state, so that the phenomenon that the bending supporting part and the bending part of the display panel are subjected to unrecoverable plastic deformation caused by the action of force generated on the display panel by the accuracy error of the rotating structure and the upward and downward sinking and floating of the rotating structure is avoided.

The utility model provides a technical scheme, the supporting part of buckling includes the stromatolite of two at least layers of sub-supporting layers, compares the supporting part of buckling of single-layer construction in the traditional scheme, and the thickness of each layer of sub-supporting layer all is less than the whole thickness of the supporting part of buckling. After the display panel is bent, the plastic deformation of each sub-supporting layer is smaller than that of the bent supporting part with the single-layer structure, the degree of plastic deformation of the bent supporting part which cannot be recovered by self after bending is reduced, the bending performance of the bent supporting part and the good deformation recovery capability after bending are enhanced, and then the crease mark generated after bending of the display panel is reduced. And the more the number of layers of the sub-supporting layers is, the thinner the thickness of each sub-supporting layer is, the smaller the plastic deformation degree generated after the bending supporting part is bent is, and the technical effect of eliminating the crease generated after the bending of the display panel can be realized by reasonably increasing the number of layers of the sub-supporting layers.

Drawings

Fig. 1 is a schematic structural diagram of a conventional display device and a top view of a support layer;

FIG. 2 is a simulated curve of a crease generated during the bending process of the display panel shown in FIG. 1;

fig. 3 is a schematic structural diagram of a display panel and a top view of a supporting layer according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of another display panel and a top view of a supporting layer according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of another display panel and a top view of a supporting layer according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of another display panel and a top view of a supporting layer according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of another display panel and a top view of a supporting layer according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of another display panel and a top view of a supporting layer according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of another display panel and a top view of a supporting layer according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of another display panel and a top view of a supporting layer according to an embodiment of the present invention;

fig. 11 is a cross-sectional view and a top view of a display device according to an embodiment of the present invention;

fig. 12 is a cross-sectional view and a top view of another display device according to an embodiment of the present invention;

fig. 13 is a cross-sectional view and a top view of another display device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

As described in the background art, the inventors have found through careful study that the existing folding display device has a distinct crease after being folded. Fig. 1 is a schematic structural diagram of a conventional display device and a top view of a support layer. Fig. 2 is a simulated curve of a crease generated in the bending process of the display panel in fig. 1. Referring to fig. 1 and 2, the conventional display device includes a housing 10 and a display panel 20, where the housing 10 includes a first rotating plate 11, a rotating structure 13, and a second rotating plate 12, and the first rotating plate 11 and the second rotating plate 12 can rotate relative to the rotating structure 13, so as to drive the display panel 20 to switch between a bent state and a flattened state. The display panel 20 includes a support layer 21 and a display panel 22, the display panel 22 includes a first non-bending portion 220, a second non-bending portion 222 and a bending portion 221, the support layer 21 includes a first non-bending support portion 210, a second non-bending support portion 212 and a bending support portion 211, and since the support layer 21 is used for supporting the display panel 22, the support layer 21 is generally made of a rigid material, such as a steel sheet. In the prior art, the bending support portion 211 is a single-layer structure, and after the bending support portion 211 is bent, plastic deformation that cannot be recovered by itself occurs, so that an obvious crease exists after the bending of the conventional folding display device, as shown in fig. 2, a depth H of the crease is greater than or equal to 0.2mm and less than or equal to 0.5 mm.

To the above technical problem, the embodiment of the utility model provides a following technical scheme:

fig. 3 is a schematic structural diagram of a display panel and a top view of a supporting layer according to an embodiment of the present invention. Referring to fig. 3, the display panel 20 includes: the display screen comprises a supporting layer 21 and a display screen body 22, wherein the display screen body 22 is positioned on the surface of the supporting layer 21; the display panel 22 includes a first non-bending portion 220, a second non-bending portion 222 and a bending portion 221, wherein the bending portion 221 is located between the first non-bending portion 220 and the second non-bending portion 222; the supporting layer 21 includes a first non-bending supporting portion 210, a second non-bending supporting portion 212 and a bending supporting portion 211, the first non-bending supporting portion 210 is used for supporting the first non-bending portion 220, the second non-bending supporting portion 212 is used for supporting the second non-bending portion 222, and the bending supporting portion 211 is used for supporting the bending portion 221; the bending support portion 211 includes a stack of at least two sub support layers stacked in a thickness direction of the display panel.

Illustratively, the display panel body 22 includes a laminate of a flexible support film, a display device layer, a touch layer, a polarizer, and a cover plate, which are stacked in the thickness direction of the display panel. The flexible support film may be, for example, polyimide, for supporting the display device layers. The display device layer may be, for example, an organic light emitting display device layer for displaying a picture. The touch layer can increase the touch function of the display screen. The polarizer is used to emit polarized light that can display an image in the human eye. The cover plate may be used to protect the display device layers.

For example, in fig. 3, the bending support 211 includes a laminated layer of a sub-support layer a1 and a sub-support layer a 2. After the display panel 20 is bent, the plastic deformation of the sub-supporting layer a1 and the sub-supporting layer a2 is smaller than that of the bending supporting portion 211 with a single-layer structure in the conventional scheme, so that the degree of plastic deformation of the bending supporting portion 211 which cannot be recovered by itself after being bent is reduced, the bending performance of the bending supporting portion 211 and the deformation recovery capability after being bent are enhanced, and further, the crease generated after the display panel 20 is bent is reduced.

The utility model provides a technical scheme, the supporting part 211 of buckling includes the stromatolite of two at least layers of sub-supporting layer, compares the supporting part 211 of buckling of single-layer construction in traditional scheme, and the thickness of each layer of sub-supporting layer all is less than the whole thickness of the supporting part 211 of buckling. After the display panel 20 is bent, the plastic deformation of each sub-supporting layer is smaller than that of the bending supporting portion 211 with a single-layer structure, so that the degree of plastic deformation of the bending supporting portion 211 which cannot be recovered by itself after bending is reduced, the bending performance of the bending supporting portion 211 and the deformation recovery capability after bending are enhanced, and further, the crease generated after bending of the display panel 20 is reduced. And the more the number of layers of the sub-supporting layers is, the thinner the thickness of each sub-supporting layer is, the smaller the degree of plastic deformation generated after the bending supporting portion 211 is bent is, and the technical effect of eliminating the crease generated after the bending of the display panel 20 can be realized by reasonably increasing the number of layers of the sub-supporting layers.

Fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Optionally, referring to fig. 4, the bend support 211 includes an intermediate bend a2, a first edge bend a1, and a second edge bend A3, the intermediate bend a2 being located between the first edge bend a1 and the second edge bend A3, the first edge bend a1 being located adjacent to the first non-bend support 210, and the second edge bend A3 being located adjacent to the second non-bend support 212; the number of layers of the neutron support layer in the middle bent part A2 is greater than that in the first edge bent part A1; the number of layers of the neutron support layer at intermediate bend a2 is greater than the number of layers of the neutron support layer at second edge bend A3.

Exemplarily, in fig. 4, the intermediate bent portion a2 includes a sub-support layer a3, a sub-support layer a4, a sub-support layer a5, and a sub-support layer a 6. The first edge bending part a1 includes a sub-support layer a1 and a sub-support layer a 2. The second edge bent portion A3 includes a sub-support layer a1 and a sub-support layer a2, so that the number of layers of the sub-support layer in the intermediate bent portion a2 is greater than the number of layers of the sub-support layer included in the first edge bent portion a 1; the number of layers of sub-support layers in intermediate bend a2 is greater than the number of layers of sub-support layers included in second edge bend A3.

It can be known that, for the bending support portion 211, in the bending state, the bending degree of the first edge bending portion a1 and the second edge bending portion A3 is less than the bending degree of the intermediate bending portion a2, the deformation recovery capability of the intermediate bending portion a2 after bending is better than that of the first edge bending portion a1 and the second edge bending portion A3, and the bending performance of the intermediate bending portion a2 is better than that of the first edge bending portion a1 and the second edge bending portion A3, which helps to reduce the crease generated after bending the display panel 20.

Specifically, when the thickness of bending support 211 is uniform, the number of layers of the neutron support layer in intermediate bent portion a2 is greater than that in first edge bent portion a1, the thickness of the neutron support layer in intermediate bent portion a2 is less than that in first edge bent portion a1, and the plastic deformation of the neutron support layer in intermediate bent portion a2 is less than that in first edge bent portion a 1. The number of layers of the neutron support layer in the middle bent part a2 is greater than that in the second edge bent part A3, the thickness of the neutron support layer in the middle bent part a2 is less than that in the second edge bent part A3, and the plastic deformation of the neutron support layer in the middle bent part a2 is less than that in the second edge bent part A3. The above technical solution enables the deformation recovery capability of the intermediate bent portion a2 after bending to be better than that of the first edge bent portion a1 and the second edge bent portion A3, and the bending performance of the intermediate bent portion a2 is better than that of the first edge bent portion a1 and the second edge bent portion A3, which helps to reduce the creases generated after bending the display panel 20.

Fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Optionally, referring to fig. 5, the sub-support layer is provided with at least one through hole.

Exemplarily, fig. 5 shows a technical solution that the bending support 211 includes a sub-support layer a1 and a sub-support layer a 2. The sub-support layer a1 is provided with at least one through hole b1, and the sub-support layer b2 is provided with at least one through hole b 2. According to the technical scheme, the area of each layer of the sub-supporting layer is reduced, the degree of plastic deformation which cannot be recovered automatically and is generated after each layer of the sub-supporting layer is bent is reduced, the bending performance of the bending supporting part 211 and the deformation recovery capability after bending are enhanced, and then the crease generated after bending of the display panel 20 is further reduced.

Optionally, the aperture ratio of the sub-support layer is less than or equal to 70%. When the aperture ratio of the sub-supporting layer is too large and is greater than 70%, the supporting performance of the bending supporting portion 211 is not good, and after the bending portion 221 of the display panel 22 returns to the flat state from the bending state, the folding of the bending portion 221 of the display panel may be caused, and further, the plastic deformation that cannot be recovered may be generated. Therefore, the aperture ratio of the sub-supporting layer is less than or equal to 70%, the supporting performance of the bending supporting portion 211 is improved, the situation that the bending portion 221 of the display screen body is wrinkled after the bending portion 221 of the display screen body returns to the flat state from the bending state is avoided, and the reduction of the crease generated after the display panel 20 is bent is facilitated.

Fig. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Optionally, referring to fig. 6, the bend support 211 includes an intermediate bend a2, a first edge bend a1, and a second edge bend A3, the intermediate bend a2 being located between the first edge bend a1 and the second edge bend A3, the first edge bend a1 being located adjacent to the first non-bend support 210, and the second edge bend A3 being located adjacent to the second non-bend support 212; the intermediate bend A2 has an open area ratio greater than the open area ratio of the first edge bend A1; the intermediate fold a2 has an open area ratio greater than the open area ratio of the second edge fold A3.

It can be known that, for the bending support portion 211, the bending degree of the first edge bending portion a1 and the second edge bending portion A3 is less than the bending degree of the intermediate bending portion a2, and the deformation recovery capability of the intermediate bending portion a2 after bending is better than that of the first edge bending portion a1 and the second edge bending portion A3, so that the bending performance of the intermediate bending portion a2 is better than that of the first edge bending portion a1 and the second edge bending portion A3, which helps to reduce the crease generated after bending the display panel 20.

Specifically, the aperture ratio of the intermediate bent portion a2 is greater than the aperture ratio of the first edge bent portion a1, and the aperture ratio of the intermediate bent portion a2 is greater than the aperture ratio of the second edge bent portion A3, so that the deformation recovery capability of the intermediate bent portion a2 after being bent is better than that of the first edge bent portion a1 and the second edge bent portion A3, and the bending performance of the intermediate bent portion a2 is better than that of the first edge bent portion a1 and the second edge bent portion A3, which helps to reduce the creases generated after the display panel 20 is bent.

Alternatively, referring to fig. 5 and 6, the through holes in different sub-support layers do not overlap in the orthographic projection of the display screen body 22 in the flattened state.

Illustratively, the through holes b1 of the sub-support layer a1 and the through holes b1 of the sub-support layer a2 do not overlap in the orthographic projection of the display screen body 22 in the flattened state.

Specifically, the orthographic projection parts of the through holes in different sub-support layers of the display screen body 22 in the flat state are overlapped or completely overlapped, so that the area of the opening of each through hole is increased, the support performance of the bending support part 211 is poor, and after the bending part 221 of the display screen body 22 returns to the flat state from the bending state, the fold of the bending part 221 of the display screen body can be caused, and further the unrecoverable plastic deformation is generated. Therefore, the through holes in different sub-support layers do not overlap in the orthographic projection of the display screen body 22 in the flat state, so that the support performance of the bending support portion 211 is improved, the phenomenon that the bending portion 221 of the display screen body folds after the bending portion 221 of the display screen body returns to the flat state from the bending state is avoided, and the reduction of the crease generated after the display panel 20 is bent is facilitated.

Optionally, the thickness of the sub-support layers is the same.

Illustratively, referring to fig. 3, 5 and 6, the thicknesses of the sub-support layer a1 and the sub-support layer a2 are the same. Referring to FIG. 4, the sub-support layers included by each of the intermediate bent portion A2, the first edge bent portion A1, and the second edge bent portion A3 have the same thickness. The thickness of the sub-supporting layers is the same, and the bending supporting portion 211 can be equally divided into a preset number of layers, so that the technical effect of eliminating creases generated after the display panel 20 is bent can be achieved, and the design difficulty of the bending supporting portion 211 is reduced.

Illustratively, when the overall thickness of the bending support 211 is 150 micrometers, the thicknesses of the sub-support layers a1 and a2 are the same, and are 75 micrometers respectively.

Preferably, the thickness of the sub-support layer is greater than or equal to 30 micrometers.

Compare the supporting part 211 of buckling of single-layer construction in traditional scheme, the number of piles of the sub-supporting layer of the supporting part 211 of buckling is more, and the thickness of each layer of sub-supporting layer is thinner, and the plastic deformation degree that the supporting part 211 of buckling produced after buckling is less, and in practical application process, can realize eliminating the technological effect of the crease that display panel 20 produced after buckling through the reasonable number of piles that increases the setting sub-supporting layer. Therefore, in the case where the process and the supporting ability of the sub-supporting layer satisfy the preset requirements, the thickness of the sub-supporting layer is set in a range of greater than or equal to 30 micrometers. Specifically, when the thickness of the sub-supporting layer is equal to 30 micrometers, the sub-supporting layer has good bending performance. When the thickness of the sub-support layer is too small to be less than 30 μm, the supporting capability of the sub-support layer is not good, and the bending portion 221 of the display panel 22 is easily wrinkled. Therefore, the thickness of the sub-support layer is greater than or equal to 30 micrometers, which not only has good bending performance and good deformation recovery capability after bending, but also has good support capability, so that the problem that the support capability of the sub-support layer is poor is avoided, the bending portion 221 of the display screen body 22 is easily wrinkled, and the reduction of the crease generated after bending of the display panel 20 is facilitated.

It should be noted that, when the thickness of the sub-supporting layer is equal to 30 micrometers, the sub-supporting layer does not have through holes, and also has good bending performance and good deformation recovery capability after bending.

Fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Fig. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Alternatively, referring to fig. 7 and 8, the display panel 20 includes a first adhesive layer 23, and the first adhesive layer 23 is positioned between at least one set of adjacent sub-support layers.

The first adhesive layer 23 may be a double-sided adhesive tape or an OCA optical adhesive tape.

Illustratively, the first adhesive layer 23 is positioned between the adjacent sub-support layer a1 and sub-support layer a2 in fig. 7 and 8. The first adhesive layer 23 can increase the adhesion between the sub-support layer a1 and the sub-support layer a2, and the elasticity and the deformation recovery capability after bending of the first adhesive layer 23 are better than those of the sub-support layer a1 and the sub-support layer a2, so that the bending performance of the bending support 211 is enhanced, and the crease generated after bending of the display panel 20 is further reduced. Alternatively, referring to fig. 8, in the bent state, the first adhesive layer 23 may enter the through hole b1 of the sub-support layer a1 and the through hole b2 of the sub-support layer a2, further reducing plastic deformation of the sub-support layer a1 and the sub-support layer a2, and thus further reducing a crease generated after the display panel 20 is bent. It should be noted that fig. 7 and 8 exemplarily show a group of adjacent sub-support layers a1 and a 2. When the number of sub-support layers is greater than or equal to 3, the first adhesive layer 23 is located between at least one set of adjacent sub-support layers.

Preferably, the sub-support layers are the same thickness; the thickness of the first adhesive layer 23 is greater than or equal to the thickness of the sub-support layer.

Illustratively, referring to fig. 7 and 8, the thicknesses of the sub-support layer a1 and the sub-support layer a2 are the same. The thicknesses of the first adhesive layer 23, the sub-support layer a1, and the sub-support layer a2 are the same. Illustratively, when the overall thickness of the bending support 211 is 150 micrometers, the thicknesses of the sub-support layer a1, the sub-support layer a2 and the first adhesive layer 23 are the same, and are 50 micrometers respectively.

Specifically, the sub-supporting layers have the same thickness; the thickness of sub-supporting layer and tie coat is the same, can equally divide into the predetermined number of piles with the supporting part 211 of buckling, is used for placing sub-supporting layer and first tie coat 23 respectively, alright in order to realize eliminating the technological effect of the crease that display panel 20 produced after buckling, has reduced the design degree of difficulty of the supporting part 211 of buckling.

Preferably, the thickness of the sub-support layers is the same; the thickness of the first adhesive layer 23 is greater than that of the sub-support layer. Because the elasticity and the deformation recovery capability after bending of the first adhesive layer 23 are superior to those of the sub-support layer a1 and the sub-support layer a2, when the thickness of the first adhesive layer 23 is greater than that of the sub-support layer, the bending performance of the bending support portion 211 can be further enhanced, and further, the crease generated after bending of the display panel 20 is further reduced.

In the thickness direction of the bending support portion 211, the sum of the thicknesses of each first adhesive layer 23 and each sub-support layer is equal to the thickness of the bending support portion 211. The thickness of the bending support portion 211, the thickness of the first non-bending support portion 210, and the thickness of the second non-bending support portion 212 may be equal or unequal. When the thickness of the bending support portion 211 is equal to the thickness of the first non-bending support portion 210 and the thickness of the second non-bending support portion 212, the thickness of the sub-support layer can be reduced appropriately to provide a receiving space for the first adhesive layer 23.

Optionally, the thickness of the first adhesive layer 23 is between 1.1 and 1.2 times the thickness of the sub-support layer. Illustratively, when the bending support 211 includes two sub-support layers and a first adhesive layer between the two sub-support layers, the thickness of the sub-support layers is 50 μm. The difference between the thickness of the first adhesive layer 23 and the thickness of the sub-support layer is greater than or equal to 5 micrometers and less than or equal to 10 micrometers. The first bonding layer can be in a leveling state at the initial stage of use, and the thickness of the first bonding layer is set in such a way, so that the surface smoothness of the supporting layer can be kept, and the support can be better provided for the display screen body; further, the bending performance of the bending support portion 211 is enhanced, and the folding mark generated after the display panel 20 is bent is further reduced.

Fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Alternatively, referring to fig. 3-8, at least two sub-support layers are connected to the first non-bending support portion 210 and the second non-bending support portion 212; alternatively, referring to fig. 9 and 10, the at least two sub-support layers are divided into a first sub-support layer group and a second sub-support layer group, the first sub-support layer group includes at least one sub-support layer, and the second sub-support layer group includes at least one sub-support layer; the sub-support layer of the first sub-support layer group is connected 212 to the second non-bending support portion, and the sub-support layer of the second sub-support layer group is connected 210 to the first non-bending support portion.

In fig. 3-8, the sub-support layer a1 and the sub-support layer a2 are connected to the first non-bending support 210 and the second non-bending support 212, respectively. Specifically, the stack of at least two sub-support layers included in the bending support portion 211 is connected to the first non-bending support portion 210 and the second non-bending support portion 212, the sub-support layers are an integral film layer with the first non-bending support portion 210 and the second non-bending support portion 212, when the display panel 20 returns to the flat state from the bending state, the bending portion 221 of the display screen body 22 is not prone to wrinkle, and thus the fold generated after bending of the display panel 20 is reduced.

Referring to fig. 9, the sub-support layer a1 belongs to the first sub-support layer group, the sub-support layer a2 belongs to the second sub-support layer group, and the sub-support layer a1 is connected to the second non-bending support portion 212. The sub-supporting layer a2 is connected to the first non-bending supporting part 210. Referring to fig. 10, the sub-support layer a11 and the sub-support layer a12 belong to a first sub-support layer group, and the sub-support layer a11 and the sub-support layer a12 are connected to the second non-bending support portion 212. The sub-support layer a21 and the sub-support layer a22 belong to a second sub-support layer group, and the sub-support layer a21 and the sub-support layer a22 are connected to the first non-bent support portion 210. Specifically, the sub-support layer of the first sub-support layer group is connected to the second non-bending support portion 212, and the sub-support layer of the second sub-support layer group is connected to the first non-bending support portion 210, so that the sub-support layer of the first sub-support layer group is prevented from transmitting plastic deformation to the first non-bending support portion 210, and the sub-support layer of the second sub-support layer group is prevented from transmitting plastic deformation to the second non-bending support portion 212, thereby further reducing the crease mark generated after bending the display panel 20.

Optionally, the sub-support layer of the first sub-support layer group and the first non-bending support portion 210 may be connected by an adhesive layer with good elasticity and good deformation recovery capability after bending. The sub-support layer of the second sub-support layer group and the second non-bending support portion 212 may be connected by an adhesive layer having good elasticity and deformation recovery capability after bending, so as to further reduce the crease generated after bending the display panel 20. The adhesive layer is illustratively double-sided tape or OCA optical tape.

Fig. 11 is a cross-sectional view and a top view of a display device according to an embodiment of the present invention. Fig. 12 is a cross-sectional view and a top view of another display device according to an embodiment of the present invention. Optionally, referring to fig. 11 and 12, the display panel 20 further includes a first fixing portion 210a and a second fixing portion 212a, the first fixing portion 210a and the first non-bending supporting portion 210 are connected in a region adjacent to the bending supporting portion 211, and the second fixing portion 212a and the second non-bending supporting portion 212 are connected in a region adjacent to the bending supporting portion 211.

Specifically, the first fixing portion 210a is used for increasing the firmness of the first non-bending supporting portion 210 and the housing 10, and the second fixing portion 212a is used for increasing the firmness of the second non-bending supporting portion 212 and the housing 10, so as to prevent the display panel 20 from being wrinkled after being bent, and further help to reduce the crease generated after the display panel 20 is bent.

Preferably, the display panel 20 further includes a second adhesive layer, and the first fixing portion 210a and the first non-bending supporting portion 210 are connected by the second adhesive layer; the second fixing portion 212a and the second non-bending support portion 212 are connected by a second adhesive layer, the first fixing portion 210a and the first non-bending support portion 210 are adhered together by the second adhesive layer, and the second fixing portion 212a and the second non-bending support portion 212 are adhered together by the second adhesive layer. Note that the second adhesive layer is not shown in the embodiment of the present invention. The second adhesive layer can be selected from double-sided adhesive tape or OCA optical adhesive tape.

Referring to fig. 12, the sub-support layer a1 belongs to the first sub-support layer group, the sub-support layer a2 belongs to the second sub-support layer group, and the sub-support layer a1 is connected to the second non-bending support portion 212. The sub-supporting layer a2 is connected to the first non-bending supporting part 210. The sub-supporting layer a1 and the first non-bending supporting portion 210 can be connected by the first adhesive layer 23 with better elasticity and deformation recovery capability. The sub-supporting layer a2 and the second non-bending supporting portion 212 can be connected by the first adhesive layer 23 with better elasticity and deformation recovery capability after bending, so as to further reduce the crease generated after bending the display panel 20.

The embodiment of the utility model provides a display device is still provided. Fig. 13 is a cross-sectional view and a top view of another display device according to an embodiment of the present invention. Referring to fig. 11 to 13, the display device includes: a housing 10, the housing 10 including a first rotating plate 11, a second rotating plate 12 and a rotating structure 13; a spacing area 14 is arranged between the first rotating plate 11 and the second rotating plate 12; the rotating structure 13 is located in the spacing region 14 and is used for driving the first rotating plate 11 and the second rotating plate 12 to rotate relatively; a display panel 20, wherein the display panel 20 is the display panel 20 according to any of the above technical solutions, a first non-bending support portion 210 of the display panel 20 is located on the surface of the first rotating plate 11, a second non-bending support portion 212 of the display panel 20 is located on the surface of the second rotating plate 12, and a bending support portion 211 of the display panel 20 is located in the spacing region 14; there is no overlap in the orthographic projection of the rotating structure 13 and the display panel 20 on the housing 10.

Alternatively, the housing 10 and the display panel 20 are fixedly connected by an adhesive layer.

Alternatively, referring to fig. 11 and 12, the rotation structure 13 includes a first connection portion 13a, a first rotation wheel 13b, a second rotation wheel 13c, and a second connection portion 13d, a first end of the first connection portion 13a is connected to the first rotation plate 11, a second end of the first connection portion 13a is connected to the first rotation wheel 13b, a first end of the second connection portion 13d is connected to the second rotation plate 12, a second end of the second connection portion 13d is connected to the second rotation wheel 13c, and the first rotation wheel 13b and the second rotation wheel 13c are connected in a rolling manner. When the first rotating wheel 13b rolls relative to the second rotating wheel 13c, the first rotating plate 11 rotates relative to the second rotating plate 12, and the display panel 20 is driven to switch between the bending state and the flattening state.

Alternatively, referring to fig. 13, the rotation structure 13 includes a third connection portion 13e, a rotation shaft 13f, and a fourth connection portion 13 g. The first end of the third connecting portion 13e is connected to the first rotating plate 11, the first end of the fourth connecting portion 13g is connected to the second rotating plate 12, the second end of the third connecting portion 13e and the second end of the fourth connecting portion 13g are sleeved on the rotating shaft 13f at intervals, so that the third connecting portion 13e can rotate relative to the fourth connecting portion 13g, the first rotating plate 11 rotates relative to the second rotating plate 12, and the display panel 20 is driven to switch between a bending state and a flattening state.

The utility model provides a display device, this display device specifically can be cell-phone, computer and support wearable equipment etc. and this display device includes display panel 20 among the above-mentioned technical scheme, and wherein, the supporting part 211 of buckling includes the stromatolite of two at least layers of sub-supporting layers, compares the supporting part 211 of buckling of single-layer construction in the traditional scheme, and the thickness of each layer of sub-supporting layer all is less than the whole thickness of the supporting part 211 of buckling. After the display panel 20 is bent, the plastic deformation of each sub-supporting layer is smaller than that of the bending supporting portion 211 with a single-layer structure, so that the degree of plastic deformation of the bending supporting portion 211 which cannot be recovered by itself after bending is reduced, the bending performance of the bending supporting portion 211 and the good deformation recovery capability after bending are enhanced, and further, the crease generated after bending of the display panel 20 is reduced. And the more the number of layers of the sub-supporting layers is, the thinner the thickness of each sub-supporting layer is, the smaller the degree of plastic deformation generated after the bending supporting part 211 is bent is, and the technical effect of eliminating the crease generated after the bending of the display device can be realized by reasonably increasing the number of layers of the sub-supporting layers. In the display device, the rotating structure 13 and the display panel 20 are not overlapped in the orthographic projection of the housing 10, and for the display device in which the rotating structure 13 and the display panel 20 are overlapped in the orthographic projection of the housing 10, no matter the rotating structure 13 is in the flat state or the bent state, the rotating structure 13 is not in contact with the display panel 20, so that the phenomenon that the bending support portion 211 and the bending portion 221 of the display panel 20 are subjected to unrecoverable plastic deformation due to the accuracy error of the rotating structure 13 and the force generated by the up-down floating of the rotating structure 13 on the display panel 20 is avoided.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (14)

1. A display panel, comprising: the display screen body is positioned on the surface of the supporting layer;

the display screen body comprises a first non-bending part, a second non-bending part and a bending part, and the bending part is positioned between the first non-bending part and the second non-bending part;

the supporting layer comprises a first non-bending supporting part, a second non-bending supporting part and a bending supporting part, the first non-bending supporting part is used for supporting the first non-bending part, the second non-bending supporting part is used for supporting the second non-bending part, and the bending supporting part is used for supporting the bending part;

the bending support part comprises a lamination of at least two sub-support layers stacked along the thickness direction of the display panel;

the bending support part comprises a middle bending part, a first edge bending part and a second edge bending part, the middle bending part is positioned between the first edge bending part and the second edge bending part, the first edge bending part is arranged adjacent to the first non-bending support part, and the second edge bending part is arranged adjacent to the second non-bending support part;

the number of layers of the sub-supporting layers in the middle bending part is greater than that of the sub-supporting layers in the first edge bending part;

the number of layers of the sub-supporting layer in the middle bending part is larger than that of the sub-supporting layer in the second edge bending part.

2. The display panel according to claim 1, wherein the sub-support layer is provided with at least one through hole.

3. The display panel of claim 2, wherein the aperture ratio of the sub-support layer is less than or equal to 70%.

4. The display panel according to claim 2, wherein the bending support portion comprises an intermediate bending portion, a first edge bending portion and a second edge bending portion, the intermediate bending portion is located between the first edge bending portion and the second edge bending portion, the first edge bending portion is disposed adjacent to the first non-bending support portion, and the second edge bending portion is disposed adjacent to the second non-bending support portion;

the aperture ratio of the intermediate bend is greater than the aperture ratio of the first edge bend;

the aperture ratio of the middle bending part is greater than the aperture ratio of the second edge bending part.

5. The display panel according to claim 2, wherein the through holes in different sub-support layers do not overlap in orthographic projection of the display screen body in the flattened state.

6. The display panel according to claim 1, wherein the sub-support layers have the same thickness.

7. The display panel of claim 6, wherein the thickness of the sub-support layer is greater than or equal to 30 micrometers.

8. The display panel according to claim 1 or 2, further comprising a first adhesive layer between at least one set of adjacent sub-support layers.

9. The display panel according to claim 8,

the thicknesses of the sub-supporting layers are the same;

the thickness of the first adhesive layer is greater than or equal to the thickness of the sub-support layer.

10. The display panel according to claim 8, wherein the thickness of the first adhesive layer is between 1.1 and 1.2 times the thickness of the sub-support layer.

11. The display panel according to claim 1, wherein the at least two sub-supporting layers are connected to the first non-bending supporting portion and the second non-bending supporting portion;

or the at least two sub-support layers are divided into a first sub-support layer group and a second sub-support layer group, the first sub-support layer group comprises at least one sub-support layer, and the second sub-support layer group comprises at least one sub-support layer; the sub-supporting layer of the first sub-supporting layer group is connected with the second non-bending supporting part, and the sub-supporting layer of the second sub-supporting layer group is connected with the first non-bending supporting part.

12. The display panel according to claim 1 or 11, wherein the display panel further comprises a first fixing portion and a second fixing portion, the first fixing portion is located in a region of the first non-bending supporting portion adjacent to the bending supporting portion, and the first fixing portion is connected to the first non-bending supporting portion; the second fixing part is located in the area of the second non-bending supporting part adjacent to the bending supporting part, and the second fixing part is connected with the second non-bending supporting part.

13. The display panel according to claim 12, wherein the display panel further comprises a second adhesive layer, and the first fixing portion and the first non-bending supporting portion are connected by the second adhesive layer;

the second fixing part and the second non-bending supporting part are connected through the second bonding layer.

14. A display device, comprising: a housing including a first rotating plate, a second rotating plate, and a rotating structure;

a spacing area is arranged between the first rotating plate and the second rotating plate;

the rotating structure is positioned in the interval area and used for driving the first rotating plate and the second rotating plate to rotate relatively;

a display panel according to any one of claims 1 to 13, wherein a first non-bending support portion of the display panel is located on a surface of the first rotating plate, a second non-bending support portion of the display panel is located on a surface of the second rotating plate, and a bending support portion of the display panel is located in the spacing region;

the rotating structure and the orthographic projection of the display panel on the shell are not overlapped.

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