CN109360832B - Flexible display panel and flexible display device - Google Patents
Flexible display panel and flexible display device Download PDFInfo
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- CN109360832B CN109360832B CN201811459642.2A CN201811459642A CN109360832B CN 109360832 B CN109360832 B CN 109360832B CN 201811459642 A CN201811459642 A CN 201811459642A CN 109360832 B CN109360832 B CN 109360832B
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- 238000005452 bending Methods 0.000 claims abstract description 172
- 239000011241 protective layer Substances 0.000 claims abstract description 99
- 239000000758 substrate Substances 0.000 claims abstract description 99
- 239000010410 layer Substances 0.000 claims description 60
- 238000000059 patterning Methods 0.000 claims description 15
- 238000002161 passivation Methods 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 abstract description 11
- 238000010586 diagram Methods 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 6
- 239000003292 glue Substances 0.000 description 6
- 230000002349 favourable effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000001771 impaired effect Effects 0.000 description 4
- 238000000576 coating method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/124—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
- H01L27/1244—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits for preventing breakage, peeling or short circuiting
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- Condensed Matter Physics & Semiconductors (AREA)
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Abstract
The invention discloses a flexible display panel and a flexible display device, wherein the flexible display panel comprises a substrate base plate which is divided into a bending area and a non-bending area, and a protective layer which is arranged on at least one side of the substrate base plate in the non-bending area; the protective layer is arranged corresponding to the bending area, a patterned structure is formed on the surface of one side, adjacent to the substrate, of the protective layer, and at least part of the patterned structure covers the routing wires arranged corresponding to the bending area. According to the technical scheme, the probability that the wiring arranged in the corresponding bending area is damaged and broken due to stress concentration is effectively reduced, and the probability that the flexible display panel has abnormal display problems is further reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a flexible display panel and a flexible display device.
Background
The flexible display panel is a flexible display panel, the display modes of the flexible display panel comprise various types such as organic electroluminescence display, electrophoresis display and liquid crystal display, and the flexible display device which is flexible and bendable has good portability, is convenient to use at any place and can bring subversive use experience to users.
The flexible display panel has the line of walking that transmits display signal and display control signal in the district of buckling, and flexible display panel is at the in-process of buckling, and the line of buckling is higher because of the impaired cracked probability of stress concentration, and then leads to flexible display panel to have the problem of showing unusually.
Disclosure of Invention
The invention provides a flexible display panel and a flexible display device, which effectively reduce the probability of damage and fracture of wiring arranged corresponding to a bending area due to stress concentration, and further reduce the probability of abnormal display problem of the flexible display panel.
In a first aspect, an embodiment of the present invention provides a flexible display panel, including a substrate base plate divided into a bending region and a non-bending region, and a protective layer disposed on at least one side of the substrate base plate in the non-bending region;
the protective layer is arranged corresponding to the bending area, a patterned structure is formed on the surface of one side, adjacent to the substrate, of the protective layer, and at least part of the patterned structure covers the routing wires arranged corresponding to the bending area.
Further, the extending direction of at least part of the patterned structure is the same as the extending direction of the trace of the corresponding bending region.
Furthermore, the routing lines and at least part of the protective layer in the bending region are located on the same side of the substrate base plate in the non-bending region.
Furthermore, the substrate base plate bends towards one side, away from the light-emitting direction of the flexible display panel, and the wiring in the bending area and at least part of the protective layer are positioned on one side, facing the light-emitting direction, of the substrate base plate in the non-bending area.
Further, the protective layer at least comprises a first protective layer arranged on one side of the substrate base plate in the non-bending area, which is far away from the bending direction of the bending area, and preferably, the first protective layer comprises a multilayer structure which is arranged in a stacked mode.
Further, along a direction away from the substrate base plate, the first protective layer sequentially comprises a first patterned protective layer and a first planarization protective layer, the thickness of the first protective layer is smaller than or equal to 150 μm, the thickness of the first patterned protective layer is smaller than that of the first planarization protective layer, and preferably, the thickness of the first protective layer is greater than or equal to 100 μm and smaller than or equal to 130 μm.
Furthermore, the protective layer further comprises a second protective layer arranged on one side of the substrate base plate of the non-bending area facing the bending direction of the bending area.
Furthermore, a first patterning structure is formed on the surface of the first protection layer adjacent to one side of the substrate base plate, a second patterning structure is formed on the surface of the second protection layer adjacent to one side of the substrate base plate, and at least part of the first patterning structure and at least part of the second patterning structure cover the routing wires arranged corresponding to the bending area.
Further, the thickness of the second protection layer is smaller than or equal to that of the first protection layer.
Further, the vertical projection area of the second protection layer on the substrate base plate is smaller than that of the first protection layer on the substrate base plate.
In a second aspect, an embodiment of the present invention further provides a flexible display device, including the flexible display panel of the first aspect.
The embodiment of the invention provides a flexible display panel and a flexible display device, wherein the flexible display panel comprises a substrate base plate which is divided into a bending area and a non-bending area, and a protective layer which is arranged on at least one side of the substrate base plate of the non-bending area, the protective layer is arranged corresponding to the bending area, a patterned structure is formed on the surface of one side, adjacent to the substrate base plate, of the protective layer, at least part of the patterned structure covers wires which are arranged corresponding to the bending area, the patterned structure is arranged to be beneficial to improving the stress release of the bending area, the probability that the wires arranged corresponding to the bending area are damaged and broken due to stress concentration is effectively reduced, and the probability that the flexible display panel has abnormal display problems is further reduced.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic cross-sectional structure diagram of a flexible display panel according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view illustrating another flexible display panel according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view illustrating another flexible display panel according to an embodiment of the present invention;
fig. 4 is a schematic top view of a trace disposed corresponding to a bending region according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating a top view of a patterned structure in a passivation layer according to an embodiment of the present invention;
fig. 6 is a schematic cross-sectional view of another flexible display panel according to an embodiment of the present invention;
fig. 7 is a schematic cross-sectional view illustrating another flexible display panel according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a flexible 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. Throughout this specification, the same or similar reference numbers refer to the same or similar structures, elements, or processes. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The embodiment of the invention provides a flexible display panel, which comprises a substrate base plate divided into a bending area and a non-bending area, and a protective layer arranged on at least one side of the substrate base plate in the non-bending area, wherein the protective layer is arranged corresponding to the bending area, a patterned structure is formed on the surface of one side, adjacent to the substrate base plate, of the protective layer, and at least part of the patterned structure covers a wire arranged corresponding to the bending area.
The flexible display panel has the line of walking that transmits display signal and display control signal in the district of buckling, and flexible display panel is at the in-process of buckling, and the line of buckling is higher because of the impaired cracked probability of stress concentration, and then leads to flexible display panel to have the problem of showing unusually.
The flexible display panel provided by the embodiment of the invention comprises a substrate base plate which is divided into a bending area and a non-bending area, and a protective layer which is arranged on at least one side of the substrate base plate of the non-bending area, wherein the protective layer is arranged corresponding to the bending area, a patterned structure is formed on the surface of one side, adjacent to the substrate base plate, of the protective layer, at least part of the patterned structure covers wires which are arranged corresponding to the bending area, the arrangement of the patterned structure is favorable for improving the stress release of the bending area, the probability of damage and fracture of the wires which are arranged corresponding to the bending area due to stress concentration is effectively reduced, and the probability of abnormal display of the flexible display panel is further reduced.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic cross-sectional structure diagram of a flexible display panel according to an embodiment of the present invention, fig. 2 is a schematic cross-sectional structure diagram of another flexible display panel according to an embodiment of the present invention, and fig. 3 is a schematic cross-sectional structure diagram of another flexible display panel according to an embodiment of the present invention. Referring to fig. 1 to 3, the flexible display panel includes a substrate base plate 1 divided into a bending region a1 and a non-bending region a2, and a protective layer 2 disposed on at least one side of the substrate base plate 1 of the non-bending region a2, fig. 1 exemplarily sets the flexible display panel to include the protective layer 2 disposed above the substrate base plate 1 of the non-bending region a2, fig. 2 exemplarily sets the flexible display panel to include the protective layer 2 disposed below the substrate base plate 1 of the non-bending region a2, and fig. 3 exemplarily sets the flexible display panel to include the protective layer 2 disposed above and below the substrate base plate 1 of the non-bending region a 2. The protection layer 2 is disposed corresponding to the bending region a1, a patterned structure is formed on a surface of the protection layer 2 adjacent to one side of the substrate 1, and at least a portion of the patterned structure covers the traces disposed corresponding to the bending region a 1.
The flexible display panel generally includes a flexible substrate, a material constituting the flexible substrate may include PI (polyimide), the flexible display panel further includes a pixel driving circuit and a light emitting unit on the flexible substrate, the light emitting unit adjusts its own brightness under the control of the pixel driving circuit, and the flexible display panel displays different pictures. The pixel driving circuit is correspondingly provided with a clock signal line, a scanning signal line, a data signal line, a power signal line and other wiring lines. When the flexible display panel is bent, the corresponding region of the flexible display panel can be bent from one end of the bending region, and in the bending process, the routing wires arranged in the corresponding bending region are higher in probability of damage and fracture due to stress concentration, so that the probability of displaying abnormal problems of the flexible display panel is increased.
With reference to fig. 1 to fig. 3, the flexible display panel according to the embodiment of the present invention includes a substrate 1 divided into a bending region a1 and a non-bending region a2, and a protection layer 2 disposed on at least one side of the substrate 1 of the non-bending region a2, where the protection layer 2 is disposed corresponding to the bending region a1, a patterned structure is formed on a surface of the protection layer 2 adjacent to one side of the substrate 1, at least a portion of the patterned structure covers traces disposed corresponding to the bending region a1, and the patterned structure in the protection layer 2 is disposed to facilitate releasing of stress of the bending region a1, so as to effectively reduce a probability of damage and fracture of the traces disposed corresponding to the bending region a1 due to stress concentration, thereby reducing a probability of the flexible display panel having an abnormal display problem.
Fig. 4 is a schematic top view structure diagram of a trace disposed corresponding to a bending region according to an embodiment of the present invention, and fig. 5 is a schematic top view structure diagram of a patterned structure in a passivation layer according to an embodiment of the present invention. With reference to fig. 1 to fig. 5, the extending direction of at least a portion of the patterned structure 20 in the protective layer 2 may be the same as the extending direction of the trace 3 of the corresponding bending region a1, so that the stress applied to the trace 3 corresponding to the bending region a1 can be uniformly released along the extending direction of the patterned structure 20, which is beneficial to improving the stress release of the bending region a1 and simultaneously is beneficial to improving the stress release uniformity of the bending region a1, thereby further reducing the probability of the trace 3 corresponding to the bending region a1 being damaged and broken due to stress concentration and the probability of the flexible display panel having abnormal display problem.
With reference to fig. 1 to fig. 5, the protective layer 2 may further include two upper and lower patterned structures 201, that is, the protective layer 2 may further include patterned structures 201 respectively disposed at two ends a and b of the bending region a1 along the bending direction XX ', and an extending direction of the patterned structures 201 is perpendicular to the bending direction XX' of the bending region a 1. Specifically, when the flexible display panel is bent, the two ends a and b of the bending region a1 along the bending direction XX ' are easily deformed greatly, so that the stress concentration of the two regions is severe, the probability of the damaged broken line of the trace 3 arranged corresponding to the two regions is high, the protective layer can further include the patterning structure 201 arranged corresponding to the bending region a1 along the two ends a and b of the bending direction XX ' respectively, the extending direction of the patterning structure 201 is perpendicular to the bending direction XX ' of the bending region a1, the release of the stress of the two regions is improved, and the probability of the damaged broken line of the trace 3 arranged corresponding to the two regions is reduced.
Optionally, the traces 3 of the bending region a1 and at least part of the protective layer 2 may be located on the same side of the substrate base plate 1 of the non-bending region a 2. For example, the traces 3 of the bending region a1 may be disposed above the substrate 1 of the non-bending region a2, and then the flexible display panel may be disposed as shown in fig. 1, including the protection layer 2 disposed above the substrate 1 of the non-bending region a 2; the trace 3 in the bending region a1 may also be disposed below the substrate 1 in the non-bending region a2, and the flexible display panel may include the protection layer 2 disposed below the substrate 1 in the non-bending region a2 as shown in fig. 2; the traces 3 in the bending region a1 may also be arranged to include both the traces 3 above the substrate base plate 1 in the non-bending region a2 and the traces 3 below the substrate base plate 1 in the non-bending region a2, and the flexible display panel may include the passivation layer 2 above and below the substrate base plate 1 in the non-bending region a2 as shown in fig. 3. Therefore, the wiring 3 and at least part of the protective layer 2 in the bending region a1 are located on the same side of the substrate 1 in the non-bending region a2, and the wiring 3 and at least part of the protective layer 2 in the bending region a1 are not located on the same side of the substrate 1 in the non-bending region a2, which is more beneficial to releasing the stress applied to the wiring 3 in the bending region a1, and further reduces the probability of the wiring 3 in the bending region a1 being damaged and broken due to stress concentration and the probability of abnormal display of the flexible display panel.
Optionally, the substrate base plate may be arranged to bend towards a side away from the light exit direction of the flexible display panel, and the routing lines and at least part of the protection layer in the bending region are located on a side of the substrate base plate in the non-bending region facing the light exit direction. As shown in fig. 1, the light emitting direction of the flexible display panel may be B1, that is, the flexible display panel emits light upwards, the substrate 1 may be bent towards a side away from the light emitting direction B1 of the flexible display panel, that is, the substrate 1 is bent from X to X', and the non-bent substrate 1 may be provided towards the light emitting direction B1, that is, the trace 3 of the bent area a1 and the protection layer 2 are provided above the non-bent area a2 substrate 1. As shown in fig. 2, the light emitting direction of the flexible display panel may be B2, that is, the flexible display panel emits light downward, the substrate 1 may be bent to a side away from the light emitting direction B2 of the flexible display panel, that is, the substrate 1 is bent from X to X', and the non-bent substrate 1 may be provided to a side facing the light emitting direction B2, that is, the trace 3 of the bent region a1 and the protection layer 2 are provided below the non-bent region a2 substrate 1. Specifically, the substrate base plate 1 needs to be bent to the back side of the substrate base plate 1 by bending the bending region a1 when being bent, in order to avoid the wiring 3 of the bending region a1 and the protective layer 2 from affecting the light-emitting rate of the display panel, the substrate base plate 1 may be arranged to be bent to the side away from the light-emitting direction of the flexible display panel, and the wiring 3 of the bending region a1 and at least part of the protective layer 2 are located on the side of the substrate base plate 1 facing the light-emitting direction of the non-bending region a 2.
Fig. 6 is a schematic cross-sectional view of another flexible display panel according to an embodiment of the present invention. As shown in fig. 6, the protection layer may be at least the first protection layer 21 disposed on the side of the non-bending region a2 substrate base plate 1 away from the bending direction of the bending region a1, preferably, the first protection layer 21 includes a multi-layer structure in a stacked arrangement, fig. 6 exemplarily sets the substrate base plate 1 to be bent downward, and the protection layer includes the first protection layer 21 disposed above the non-bending substrate base plate 1 and corresponding to the bending region a 1.
As shown in fig. 6, it may be arranged that the first protective layer 21 includes a first patterned protective layer 211 and a first planarizing protective layer 212 in this order in a direction away from the base substrate 1, a thickness of the first protective layer 21 is 150 μm or less, and a thickness of the first patterned protective layer 211 is smaller than a thickness of the first planarizing protective layer 212. Preferably, the thickness of the first protective layer 21 is 100 μm or more and 130 μm or less.
Specifically, provided in a direction away from the base substrate 1, the first protective layer 21 includes a first patterned protective layer 211 and a first planarizing protective layer 212 in this order, when making its surface in bending district A1 smooth after the flexible display panel buckles, avoided setting up first protective layer 21 and only included the first patterning protective layer structure 211 and lead to the first protective layer 21 surface height fluctuation too big, the relatively poor problem of the homogeneity of bending district A1 stress release, to the first protective layer 21 of same thickness, set up along the direction of keeping away from substrate base plate 1, first protective layer 21 includes first patterning protective layer 211 and first planarization protective layer 212 in proper order, for setting up first protective layer 21 and only including first patterning protective layer 211, effectively reduced the height fault on first protective layer 21 surface, the homogeneity of bending district A1 stress release has been promoted, further reduced the impaired probability of fracture of the line 3 of walking that corresponds bending district A1 and set up.
The thickness that sets up first patterning protection layer 211 is less than the thickness of first planarization protection layer 212, and the position that is provided with the patterning structure in the first patterning protection layer 211 that can effectively avoid the too big thickness of first patterning protection layer 211 to lead to is too big with the height section offset of fretwork position, is unfavorable for improving the problem of bending zone A1 stress release's homogeneity. In addition, the material constituting the first patterned protection layer 211 and the first planarizing protection layer 212 may be an optical glue, for example, a UV (ultraviolet) glue, that is, an ultraviolet light curing glue, the first patterned protection layer 211 and the first planarizing protection layer 212 may be formed by a glue coating method, and if the thickness of the first patterned protection layer 211 is too small, the UV glue forming the first planarizing protection layer 212 is likely to penetrate into a hollow area of the first patterned protection layer 211 to damage the patterned structure in the first patterned protection layer 211 when the first planarizing protection layer 212 is formed by glue coating after the first patterned protection layer 211 is formed.
Fig. 7 is a schematic cross-sectional view of another flexible display panel according to an embodiment of the present invention. On the basis of the flexible display panel with the structure shown in fig. 6, the protective layer in the flexible display panel with the structure shown in fig. 7 may further include a second protective layer 22 disposed on one side of the substrate 1 facing the bending direction of the bending region a1 in the non-bending region a2, fig. 7 also exemplarily provides that the substrate 1 is bent downward, and the protective layer further includes the second protective layer 22 disposed below the non-bending substrate 1 and corresponding to the bending region a 1.
As shown in fig. 7, a first patterned structure may be formed on a surface of the first protection layer 21 adjacent to the substrate 1, a second patterned structure may be formed on a surface of the second protection layer 22 adjacent to the substrate 1, and at least a portion of the first patterned structure and at least a portion of the second patterned structure cover the traces 3 disposed corresponding to the bending region a 1. Exemplarily, the traces 3 of the bending region a1 may include the traces 3 located above the non-bending region a2 substrate 1 and the traces 3 located below the non-bending region a2 substrate 1, the surface of the first protection layer 21 adjacent to the substrate 1 side forms a first patterned structure, the surface of the second protection layer 22 adjacent to the substrate 1 side forms a second patterned structure, at least a portion of the first patterned structure and at least a portion of the second patterned structure cover the traces 3 located corresponding to the bending region a1, the stress applied to the traces 3 located corresponding to the bending region a1 is further released, and the probability of the traces 3 located corresponding to the bending region a1 breaking due to stress concentration and the probability of the flexible display panel displaying an abnormal problem are reduced.
Optionally, the extending direction of at least part of the first patterned structure and at least part of the second patterned structure may be the same as the extending direction of the traces of the corresponding bending region. With reference to fig. 4, fig. 5 and fig. 7, the traces 3 above and below the substrate 1 in the non-bending region a2 can be exemplarily arranged in the direction shown in fig. 4, and the first patterned structure and the second patterned structure are both formed in the patterned shape shown in fig. 5, so that the stress applied to the trace 3 corresponding to the bending region a1 can be uniformly released along the extending direction of the first patterned structure and the extending direction of the second patterned structure, which is beneficial to improving the stress release of the bending region a1 and simultaneously the stress release uniformity of the bending region a1, and further reduces the probability of the trace 3 arranged corresponding to the bending region a1 that is damaged and broken due to stress concentration and the probability of abnormal display problem of the flexible display panel.
As shown in fig. 7, the vertical projection area of the protective layer of the second protective layer 22 on the base substrate 1 may be set smaller than the vertical projection area of the protective layer of the first protective layer 21 on the base substrate 1. Specifically, the substrate base plate 1 is exemplarily arranged to be bent downwards, because the first protection layer 21 is arranged on one side of the substrate base plate 1, which deviates from the bending direction of the bending region a1, in the non-bending region a2, the second protection layer 22 is arranged on one side of the substrate base plate 1, which faces the bending direction of the bending region a1, in the non-bending region a2, and the vertical projection area of the second protection layer 22 on the substrate base plate 1 is smaller than that of the first protection layer 21, which is favorable for reducing the bending difficulty of the bending region a1, that is, is favorable for the flexible display panel to realize bending.
As shown in fig. 7, the thickness of the protective layer of the second protective layer 22 may be set to be equal to or less than the thickness of the protective layer of the first protective layer 21. Specifically, in the process of bending the flexible display panel, the outer layer of the bending part is stretched, the inner layer is extruded, a transition layer which is neither stretched nor extruded exists on the section of the bending part, which is called as a bending neutral layer, and the probability of damage and fracture of the wiring 3 arranged corresponding to the stretched position is higher than the probability of damage and fracture of the wiring 3 arranged corresponding to the extruded position. The thickness that sets up the thickness less than or equal to first protective layer 21 protective layer of second protective layer 22 protective layer can make the neutral layer of buckling more be close to the tensile position of kink district A1, is favorable to promoting the release of the 3 stresses of the stretched line of walking that correspond kink district A1 to set up, reduces these and walks 3 because of the impaired cracked probability of stress concentration.
It should be noted that the drawings of the embodiments of the present invention only show the sizes of the film layers and the structures by way of example, and do not represent the actual sizes of the film layers and the structures in the flexible display panel.
The flexible display panel provided by the embodiment of the invention comprises a substrate base plate which is divided into a bending area and a non-bending area, and a protective layer which is arranged on at least one side of the substrate base plate of the non-bending area, wherein the protective layer is arranged corresponding to the bending area, a patterned structure is formed on the surface of one side, adjacent to the substrate base plate, of the protective layer, at least part of the patterned structure covers wires which are arranged corresponding to the bending area, the arrangement of the patterned structure is favorable for improving the stress release of the bending area, the probability of damage and fracture of the wires which are arranged corresponding to the bending area due to stress concentration is effectively reduced, and the probability of abnormal display of the flexible display panel is further reduced.
Fig. 8 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention. As shown in fig. 8, the flexible display device 91 includes the flexible display panel 92 in the above embodiment, so that the flexible display device 91 provided in the embodiment of the present invention also has the beneficial effects described in the above embodiment, and details are not repeated herein. The flexible display device may be, for example, a mobile phone terminal, a tablet computer, a mobile phone of a vehicle-mounted display device, or an electronic device such as a wearable device.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated 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 by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (5)
1. A flexible display panel is characterized by comprising a substrate base plate divided into a bending area and a non-bending area, and a protective layer arranged on at least one side of the substrate base plate of the non-bending area;
the protective layer is arranged corresponding to the bending area, a patterned structure is formed on the surface of one side, adjacent to the substrate, of the protective layer, and at least part of the patterned structure covers the routing wires arranged corresponding to the bending area;
wherein the patterned structure comprises a first sub-patterned structure, a second sub-patterned structure, and a third sub-patterned structure;
the first sub-patterned structure and the second sub-patterned structure both extend from a first side edge of the flexible display panel to a second side edge opposite to the first side edge, the extending directions of the first sub-patterned structure and the second sub-patterned structure are both perpendicular to the bending direction of the bending region, and the first sub-patterned structure and the second sub-patterned structure respectively cover two ends of the bending region along the bending direction;
the extending direction of the third sub-patterned structure is the same as the extending direction of the routing of the corresponding bending region, one end of the third sub-patterned structure is connected with the first sub-patterned structure, and the other end of the third sub-patterned structure is connected with the second sub-patterned structure;
the protective layer at least comprises a first protective layer arranged on one side of the substrate base plate in the non-bending area, which is far away from the bending direction of the bending area, and the first protective layer comprises a multi-layer structure which is arranged in a stacked mode;
the first protective layer sequentially comprises a first patterning protective layer and a first planarization protective layer along the direction far away from the substrate base plate, the thickness of the first patterning protective layer is smaller than that of the first planarization protective layer, and the thickness of the first protective layer is larger than or equal to 100 micrometers and smaller than or equal to 130 micrometers;
the protective layer also comprises a second protective layer arranged on one side of the substrate base plate in the non-bending area, which faces the bending direction of the bending area;
the thickness of the second protective layer is less than or equal to that of the first protective layer; the vertical projection area of the second protective layer on the substrate base plate is smaller than that of the first protective layer on the substrate base plate.
2. The flexible display panel according to claim 1, wherein the traces of the bending region and at least a portion of the protection layer are located on a same side of the substrate in the non-bending region.
3. The flexible display panel according to claim 2, wherein the substrate base plate is bent to a side away from a light exit direction of the flexible display panel, and the traces and at least a portion of the protection layer in the bending region are located on a side of the substrate base plate in the non-bending region facing the light exit direction.
4. The flexible display panel according to claim 1, wherein a first patterned structure is formed on a surface of the first passivation layer adjacent to one side of the substrate, a second patterned structure is formed on a surface of the second passivation layer adjacent to one side of the substrate, and at least a portion of the first patterned structure and at least a portion of the second patterned structure cover traces disposed corresponding to the bending region.
5. A flexible display device comprising the flexible display panel according to any one of claims 1 to 4.
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| CN110379937B (en) * | 2019-07-25 | 2021-12-14 | 云谷（固安）科技有限公司 | Flexible display panel, manufacturing method thereof and flexible display device |
| CN111403453B (en) * | 2020-03-26 | 2023-06-30 | 武汉华星光电半导体显示技术有限公司 | Flexible display panel and display device |
| CN114072869B (en) * | 2020-04-30 | 2024-04-02 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN111933611B (en) * | 2020-07-31 | 2023-08-18 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN112150928B (en) * | 2020-09-25 | 2022-07-12 | 合肥维信诺科技有限公司 | Flexible cover plate, manufacturing method thereof and display device |
| CN112397453B (en) * | 2020-11-18 | 2023-06-27 | 武汉华星光电半导体显示技术有限公司 | Display panel and electronic equipment |
| CN113035058B (en) * | 2021-02-23 | 2024-01-23 | 合肥维信诺科技有限公司 | Display panel, manufacturing method of display panel and display device |
| CN114141141B (en) * | 2021-11-08 | 2023-05-16 | 荣耀终端有限公司 | Display panel and electronic equipment |
| CN117082896A (en) * | 2023-08-31 | 2023-11-17 | 长沙惠科光电有限公司 | Display panel and display device |
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| CN107274793A (en) * | 2017-08-23 | 2017-10-20 | 合肥同诺文化科技有限公司 | Flexible display screen and the electronic equipment with the display screen |
| CN107491221B (en) * | 2017-08-31 | 2023-08-22 | 京东方科技集团股份有限公司 | Display substrate, preparation method and display device |
| CN107634086B (en) * | 2017-09-15 | 2020-03-03 | 京东方科技集团股份有限公司 | Flexible array substrate, preparation method and display device |
| CN108281387B (en) * | 2018-01-23 | 2019-09-24 | 武汉华星光电半导体显示技术有限公司 | The production method and flexible display apparatus of flexible display apparatus |
| CN108417730B (en) * | 2018-03-19 | 2020-12-25 | 京东方科技集团股份有限公司 | Flexible substrate, preparation method thereof and display device |
| CN108682307B (en) * | 2018-07-18 | 2024-06-25 | 昆山国显光电有限公司 | Display panel and display device |
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