CN115050266A - Bendable display screen and bendable display device - Google Patents
Bendable display screen and bendable display device Download PDFInfo
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- CN115050266A CN115050266A CN202210763753.2A CN202210763753A CN115050266A CN 115050266 A CN115050266 A CN 115050266A CN 202210763753 A CN202210763753 A CN 202210763753A CN 115050266 A CN115050266 A CN 115050266A
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- 238000005452 bending Methods 0.000 claims abstract description 33
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- 238000000034 method Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
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- 239000011521 glass Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The invention discloses a bendable display screen and a bendable display device, wherein the bendable display screen comprises: comprising a display functional layer and a support structure; the support structure comprises a first support structure and a second support structure; the plastic deformation of the first support structure is greater than that of the second support structure; the bendable display screen comprises a first state and a second state; in the first state, the bending frequency of the bendable display screen is M, and the length of the first support structure along the first direction is L1; in the second state, the bending frequency of the bendable display screen is N, and the length of the first supporting structure along the first direction is L2; wherein N is greater than M, L2 is greater than L1; the first direction is parallel to the arrangement direction of the first straight area, the second straight area and the bendable area. By adopting the technical scheme, the depression of each film layer in the bendable region can be reduced, the crease of the bendable display screen is reduced, and the product performance is improved.
Description
Technical Field
The invention relates to the technical field of flexible display, in particular to a bendable display screen and a bendable display device.
Background
With the diversification of flexible display products, the folding display products are deeply favored by users by virtue of the advantages of portability, large size expansion and the like. The folding display product takes a flexible material as a base body, so that the folding display product can realize the bending effect. However, folding shows that the product life of the product is short and creases easily appear.
Disclosure of Invention
The invention provides a bendable display screen and a bendable display device, and aims to solve the problem that the bendable display screen is easy to have creases.
According to an aspect of the present invention, there is provided a bendable display screen, including: a first flat region, a second flat region, and a bendable region connecting the first flat region and the second flat region;
the bendable display screen also comprises a display function layer and a support structure; the support structure comprises a first support structure and a second support structure; the first support structure is located between the display functional layer and the second support structure;
at least part of the first support structure and at least part of the second support structure are located in the bendable region; the first support structure has a greater plastic deformation than the second support structure;
when the bendable display screen is bent, the bendable area of the bendable display screen is switched from a straight state to a bent state; the bendable display screen comprises a first state and a second state; in the first state, the bending frequency of the bendable display screen is M, and the length of the first support structure along the first direction is L1; in the second state, the bending frequency of the bendable display screen is N, and the length of the first support structure along the first direction is L2; wherein N is greater than M, L2 is greater than L1; the first direction is parallel to the arrangement direction of the first flat area, the second flat area and the bendable area.
According to another aspect of the present invention, a foldable display device is provided, which particularly includes the above-mentioned foldable display screen.
The bendable display screen provided by the embodiment of the invention can support the bendable region of the bendable display screen by arranging the support structure in the bendable display screen, and the support structure also comprises the first support structure with larger plastic deformation and the second support structure with smaller plastic deformation, the first support structure can generate partial unrecoverable deformation when the bendable display screen is bent, the first support structure gradually extends to the first flat region and the second flat region along the first direction along with the increase of the bending times of the bendable display screen, other film layers in the bendable display screen can be pulled, so that the film layer of the bendable region in the bendable display screen has the tendency of approaching the first flat region and the second flat region along the first direction, the extension length of the first support structure gradually increases along with the increase of the bending times, and the tendency of the film layer of the bendable region in the bendable display screen approaching the first flat region and the second flat region along the first direction can be increased, the flatness of the bendable display screen is improved, the depression of each film layer in a bendable area is reduced, the crease of the bendable display screen is reduced, and the product performance is improved.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a bendable display screen after repeated folding and unfolding operations in the prior art;
fig. 2 is a schematic structural diagram of a bendable display screen according to an embodiment of the present invention in a bent state;
fig. 3 is a schematic structural diagram of a bendable display screen in a flat state according to an embodiment of the present invention;
fig. 4 is a schematic view of a film structure of a bendable display screen in a first state according to an embodiment of the present invention;
fig. 5 is a schematic view of a film structure of a bendable display screen in a second state according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a film structure of a flexible display panel according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a film structure of a support structure according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a film structure of another support structure according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a film structure of another support structure according to an embodiment of the present invention;
FIG. 10 is a schematic view of a film structure of a flexible display panel according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of a film structure of another supporting structure according to an embodiment of the present invention;
FIG. 12 is a schematic view of a film structure of a flexible display panel according to an embodiment of the present invention;
fig. 13 is a schematic view of a film structure of a bendable display screen according to an embodiment of the invention;
FIG. 14 is a schematic view of a film structure of a flexible display panel according to another embodiment of the present invention;
FIG. 15 is a schematic diagram of a film structure of another support structure according to an embodiment of the present invention;
FIG. 16 is a schematic diagram of a film structure of another support structure according to an embodiment of the present invention;
FIG. 17 is a schematic top view of another support structure provided in accordance with an embodiment of the present invention;
FIG. 18 is a schematic diagram of a film structure of another support structure according to an embodiment of the present invention;
FIG. 19 is a schematic diagram of a film structure of another support structure according to an embodiment of the present invention;
fig. 20 is a schematic structural diagram of a bendable display device according to an embodiment of the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of a bendable display screen after repeated folding and unfolding operations in the prior art. Referring to fig. 1, the foldable display screen 01 can be folded along the folding shaft 02, after repeated folding and unfolding operations, the folding area 03 of the foldable display screen 01 can show creases, folds or other degradation, and the folding area 03 of the foldable display screen 01 has a certain degree of collapse, which is an unrecoverable deformation, resulting in uneven surface of the foldable display screen 01 and affecting product performance.
To solve the above technical problem, an embodiment of the present invention provides a bendable display screen, including: the bending device comprises a first straight area, a second straight area and a bendable area connecting the first straight area and the second straight area; the bendable display screen also comprises a display functional layer and a support structure; the support structure comprises a first support structure and a second support structure; the first support structure is located between the display functional layer and the second support structure; at least part of the first support structure and at least part of the second support structure are positioned in the bendable region; the plastic deformation of the first support structure is greater than the plastic deformation of the second support structure. The bendable display screen also comprises a first state and a second state; in a first state, the bending frequency of the bendable display screen is M, and the length of the first support structure along the first direction is L1; in the second state, the bending frequency of the bendable display screen is N, and the length of the first supporting structure along the first direction is L2; wherein N is more than M, and L2 is more than L1; the first direction is parallel to the arrangement direction of the first straight area, the second straight area and the bendable area.
By adopting the technical scheme, the bendable region of the bendable display screen can be supported, along with the increase of the bending times of the bendable display screen, the first supporting structure gradually extends towards the first straight region and the second straight region along the first direction, other film layers in the bendable display screen can be pulled, the film layer of the bendable region in the bendable display screen has the trend of approaching to the first straight region and the second straight region along the first direction, the extending length of the first supporting structure gradually increases along with the increase of the bending times, the trend of approaching the film layer of the bendable region to the first straight region and the second straight region along the first direction in the bendable display screen can be increased, the flatness of the bendable display screen is improved, the depression of each film layer in the bendable region is reduced, the crease of the bendable display screen is reduced, and the product performance is improved.
The above is the core idea of the present invention, and based on the embodiments of the present invention, a person skilled in the art can obtain all other embodiments without creative efforts, which belong to the protection scope of the present invention. The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Fig. 2 is a schematic structural view of a bendable display screen according to an embodiment of the present invention in a bent state, fig. 3 is a schematic structural view of the bendable display screen according to an embodiment of the present invention in a flat state, fig. 4 is a schematic structural view of a film layer of the bendable display screen according to an embodiment of the present invention in a first state, and fig. 5 is a schematic structural view of the film layer of the bendable display screen according to an embodiment of the present invention in a second state. Referring to fig. 2 to 5, the bendable display screen 10 includes: a first flat region 101, a second flat region 102, and a bendable region 103 connecting the first flat region 101 and the second flat region 102; the flexible display screen 10 further includes a display functional layer 110 and a support structure 120; the support structure 120 comprises a first support structure 121 and a second support structure 123, the first support structure 121 being located between the display functional layer 110 and the second support structure 122.
Wherein at least part of the first support structure 121 and at least part of the second support structure 122 are located in the bendable region 103; the first support structure 121 has a larger plastic deformation than the second support structure 122. According to the different bending times, the bendable display screen 10 comprises a first state and a second state; in a first state, the bending frequency of the bendable display screen is M, and the length of the first support structure along the first direction is L1; in the second state, the number of bending times of the bendable display screen 10 is N, and the length of the first supporting structure 121 along the first direction is L2; wherein N is greater than M, L2 is greater than L1; the first direction X is parallel to the arrangement direction of the first flat region 101, the second flat region 102, and the bendable region 103.
It is understood that the bendable display screen 10 can be bent along a folding axis extending in one or more directions, the bendable display screen 10 includes a plurality of flat regions, and the embodiment of the invention is only described by way of example that the bendable display screen 10 includes the first flat region 101 and the second flat region 102. The plastic deformation refers to deformation caused by stress, and the deformation cannot completely disappear after the stress disappears, so that partial residual deformation exists. The first supporting structure 121 may be a material with large plastic deformation and flexibility, such as copper, aluminum, etc. with good ductility; the second support node 122 may be a material with a large flexibility, such as stainless steel, titanium alloy, copper alloy, nickel-titanium alloy (i.e., memory metal), or a combination thereof, and has the characteristics of good flexibility, recovery and high tensile strength. When the flexible display screen 10 is in the flat state, the first direction X is a direction parallel to the plane of the flexible display screen 10, and may be an arrangement direction of the first flat region 101, the bendable region 103, and the second flat region 102, or an arrangement direction of the second flat region 102, the bendable region 103, and the first flat region 101.
In order to more clearly describe the function of the support structure 120 in the bendable region 103, the film layer structure diagram provided by the embodiment of the invention only exemplarily shows the film layer structure of the bendable region 103.
Illustratively, the flexible display screen 10 further includes a cover 130 and a buffer layer 140, the cover 130 is located on a side of the display function layer 110 away from the support structure 120, a touch layer (not shown) may be disposed between the cover 130 and the display function layer 110, and the buffer layer 140 is located between the display function layer 110 and the support structure; the cover plate 130 of the bendable region 103 includes but is not limited to flexible glass, and can protect the display function layer 110 and the touch layer from being scratched or damaged; the buffer layer 140 includes, but is not limited to, foam and a heat dissipation layer, which can buffer internal stress when the bendable display 10 is bent and relieve external force when the bendable display 10 is subjected to external force. Taking the bendable display screen as an OLED flexible screen as an example, the display function layer 110 includes an organic light emitting layer and a driving circuit layer (not shown in the figure), the organic light emitting layer includes an organic light emitting diode, and the driving circuit layer includes active or passive devices such as capacitors, resistors, transistors, and the like. It is understood that when the flexible display 10 is other flexible display, the structure of the display function layer 110 may be changed, and the specific type of the flexible display is not limited by the embodiment of the invention.
With continued reference to fig. 2-5, buffer layer 140 may be in direct contact with first support structure 121, and first support structure 121 may be in direct contact with second support structure 122. When the bendable display screen 10 is bent, the bendable region 103 of the bendable display screen 10 is switched from a straight state to a bent state, and in the bent state, the first supporting structure 121 located in the bendable region 103 is stressed to deform, and the first supporting structure 121 can extend towards the first straight region 101 and the second straight region 102; when the bendable region 103 is restored to the flat state, the first supporting structure 121 is still partially deformed and cannot be restored. Along with the increase of the bending times of the bendable display screen 10, the length of the first supporting structure 121 along the first direction X is increased in the straight state, that is, along with the increase of the bending times of the bendable display screen 10, and in the straight state, the first supporting structure 121 gradually extends towards the first straight region 101 and the second straight region 102 along the first direction X. When the first supporting structure 121 extends towards the first flat region 101 and the second flat region 102 along the first direction X, the first supporting structure 121 deforms, so that a first acting force which is pulled towards the first flat region 101 and the second flat region 102 along the first direction X is generated on each film layer including the display functional layer 110, each film layer including the display functional layer 110 in the bendable region 103 has a tendency of approaching the first flat region 101 and the second flat region 102 along the first direction X, and the phenomenon that the bendable region 103 has creases or collapses can be avoided; with the increase of the bending times of the bendable display screen 10, the extending length of the first supporting structure 121 gradually increases, and the trend that each film layer including the display functional layer 110 in the bendable region 103 approaches the first straight region 101 and the second straight region 102 along the first direction X also gradually increases. When the first supporting structure 121 extends toward the first flat region 101 and the second flat region 102 along the first direction X, a second acting force that pulls the first flat region 101 and the second flat region 102 along the first direction X is also generated on the second supporting structure 122, so that the second supporting structure 122 tends to approach the first flat region 101 and the second flat region 102 along the first direction X, which can increase the supporting capability of the second supporting structure 122 on the bendable region 103.
The bendable display screen provided by the embodiment of the invention can support the bendable region of the bendable display screen by arranging the support structure in the bendable display screen, and the support structure also comprises the first support structure with larger plastic deformation and the second support structure with smaller plastic deformation, the first support structure can generate partial unrecoverable deformation when the bendable display screen is bent, and the first support structure gradually extends to the first flat region and the second flat region along the first direction along with the increase of the bending times of the bendable display screen, so that other film layers in the bendable display screen can be pulled, the film layer of the bendable region in the bendable display screen has the tendency of approaching the first flat region and the second flat region along the first direction, the extension length of the first support structure gradually increases along with the increase of the bending times, and the tendency of the film layer of the bendable region in the bendable display screen approaching the first flat region and the second flat region along the first direction can be increased, the flatness of the bendable display screen is improved, the depression of each film layer in a bendable area is reduced, the crease of the bendable display screen is reduced, and the product performance is improved.
Optionally, referring to fig. 6, the bendable display 10 further includes a first adhesive layer 151, the first adhesive layer 151 is located between the display functional layer 110 and the support structure 120, and a surface of the first adhesive layer 151 close to one side of the first support structure 121 contacts the first support structure 121.
For example, the first adhesive layer 151 is located on a side of the buffer layer 140 close to the support structure, a surface of the first adhesive layer 151 away from the first support structure 121 may be in direct contact with the buffer layer 140, and a surface of the first adhesive layer 151 close to the first support structure 121 may be in direct contact with the first support structure 121; the first adhesive layer 151 has certain elasticity and adhesiveness. When the first support structure 121 extends toward the first flat region 101 and the second flat region 102 along the first direction X in the flat state, a third force is generated to the first adhesive layer 151 to pull the first flat region 101 and the second flat region 102 along the first direction X, and under the elastic and adhesive effects, the first adhesive layer 151 pulls the buffer layer 140 of the bendable region 103 toward the first flat region 101 and the second flat region 102 along the first direction X. Because the partial deformation of the first support structure 121 when extending towards the first flat region 101 and the second flat region 102 along the first direction X is not recoverable, the first adhesive layer 151 elastically deforms after receiving the third force of the first support structure 121 (the first adhesive layer 151 is pulled in a direction close to the first flat region 101 and the second flat region 102 along the first direction X), the first adhesive layer 151 has a tendency of recovering the deformation, the tendency is to pull the buffer layer 140 of the bendable region 103 to one side close to the flat region, and then the tendency of the buffer layer 140 of the bendable region 103 to be close to the first flat region 101 and the second flat region 102 along the first direction X is increased. Therefore, the film layer of the bendable region 103 tends to approach the first straight region 101 and the second straight region 102 along the first direction X, and the folding line of the bendable display screen is further reduced.
Optionally, fig. 7 is a schematic diagram of a film structure of a support structure according to an embodiment of the present invention, referring to fig. 7, a surface of the second support structure 122 close to the display function layer 110 is a first surface 1201, and the first surface 1201 includes the accommodating recess disposing region 104; the accommodating groove 012 is disposed in the accommodating groove 104, and the first support structure 121 is disposed in the accommodating groove 012. The groove arrangement region 104 is at least partially located in the bendable region 103.
Illustratively, in the flat state, when the first supporting structure 121 extends toward the first flat region 101 and the second flat region 102 along the first direction X, the first supporting structure 121 may extrude the side wall of the accommodating recess 012 along the first direction X toward the first flat region 101 and the second flat region 102, the second supporting structure 122 is extruded and tends to approach the first flat region 101 and the second flat region 102 along the first direction X, and further, pulling each film layer in the bendable region 103 including the display functional layer 110 tends to approach the first flat region 101 and the second flat region 102 along the first direction X. Therefore, the flatness of the bendable display screen can be improved, the depression of each film layer in a bendable region is reduced, the crease of the bendable display screen is reduced, and the product performance is improved.
Optionally, fig. 8 is a schematic diagram of a film structure of another support structure provided in an embodiment of the present invention, and referring to fig. 7 and 8, a side surface of the first support structure 121 close to the display functional layer 110 is a second surface 1202; the first surface 1201 further includes non-recessed setting regions 105 located on opposite sides of the receiving recessed setting region 104; the second support structure 122 further comprises a third surface 1203 facing away from the display functional layer 110. When the bendable region 103 of the bendable display screen 10 is in the flat state, the maximum distance between the second surface 1202 and the third surface 1203 is H1; the distance between the first surface 1201 and the third surface 1203 of the non-groove setting region 105 is H2; wherein 0 is not less than H1-H2 is not less than 150 μm.
Illustratively, as the number of bending times of the bendable display screen 10 increases, in a flat state, the length of the first supporting structure 121 along the first direction X increases, but the sidewall of the accommodating groove 012 may block the first supporting structure 121 from continuing to extend along the first direction X toward a direction close to the first flat region 101 and the second flat region 102, and the second supporting structure 122 has a fourth acting force acting on the first supporting structure, and the direction of the acting force is directed toward the center of the accommodating groove 012 along the first direction X, so that the first supporting structure 121 arches toward a side close to the display function layer 110. The material, thickness, size, etc. of the first supporting structure 121 and the second supporting structure 122 are reasonably selected, so that the height of the first supporting structure 121 arching to the side close to the display function layer 110 is not higher than 150 μm in the bending life of the bendable display screen 10. Therefore, the supporting performance of the supporting structure 120 on the bendable display screen 10 can be improved, the crease of the bendable region 103 can be offset, and the flatness of the bendable display screen 10 can be improved.
Optionally, fig. 9 is a schematic diagram of a film structure of another supporting structure according to an embodiment of the present invention, referring to fig. 7 to 9, the foldable display screen 10 further includes a third state, in which a maximum distance H1 between the second surface 1202 and the third surface 1203 is equal to a distance H2 between the first surface 1201 and the third surface 1203 of the non-groove setting region 105; at this time, a distance d between the first supporting structure 121 and the side wall of the accommodating recess 012 is greater than or equal to 0. The third state includes the case where the number of times of bending of the flexible display panel 10 is 0 and the case where the number of times of bending is small, and at this time, the first supporting structure 121 is not arched to the side close to the display function layer 110.
For example, when the bendable display screen provided by the embodiment of the invention is manufactured, a gap is left between the first supporting structure 121 and the side wall of the accommodating groove 012, and a distance d between the first supporting structure 121 and the side wall of the accommodating groove 012 is greater than 0, so as to reserve an extension space of the first supporting structure 121. When the number of bending times is less, the foldable display screen 10 is not easily creased, the first supporting structure 121 does not arch to the side close to the display function layer 110, and H1 is H2, so that it can be avoided that the first supporting structure 121 arches to the side close to the display function layer 110 at the initial stage of use of the foldable display screen 10, which results in abnormal protrusion of the foldable display screen 10. When the number of bending times is large, the distance d between the first supporting structure 121 and the sidewall of the accommodating recess 012 gradually approaches 0; along with the increase of the bending times, the probability of the display screen 10 with the bending creases is increased; after the distance d between the side walls of the first supporting structure 121 and the accommodating groove 012 is 0, along with the increase of the bending times, the first supporting structure 121 gradually arches toward one side close to the display function layer 110, so as to offset the crease of the bendable region 103, thereby improving the flatness of the bendable display screen.
Optionally, fig. 10 is a schematic diagram of a film structure of another bendable display screen according to an embodiment of the present invention, referring to fig. 10, the bendable display screen 10 further includes a second adhesive layer 152, the second adhesive layer 152 is located between the first support structure 121 and the second support structure 122, a surface of the second adhesive layer 152 near a side of the first support structure 121 contacts the first support structure 121, and a surface of the second adhesive layer 152 near a side of the second support structure 122 contacts the second support structure 122.
Illustratively, the second adhesive layer 152 also has a certain elasticity and viscosity, and when the first support structure 121 extends toward the first flat region 101 and the second flat region 102 along the first direction X in the flat state, a fifth acting force is generated on the second adhesive layer 152 to pull toward the first flat region 101 and the second flat region 102 along the first direction X, and under the elasticity and viscosity, the second adhesive layer 152 pulls the second support structure 122 toward the first flat region 101 and the second flat region 102 along the first direction X. Because the deformation of the first support structure 121 is not recoverable when extending toward the first flat region 101 and the second flat region 102 along the first direction X, the second adhesive layer 152 is elastically deformed after receiving the fifth acting force of the first support structure 121 (the second adhesive layer 152 is pulled in a direction close to the first flat region 101 and the second flat region 102 along the first direction X), the second adhesive layer 152 has a tendency of recovering the deformation, and the tendency pulls the second support structure 122 to a side close to the flat region, thereby increasing a tendency of the second support structure 122 to approach the first flat region 101 and the second flat region 102 along the first direction X. Therefore, the support of the second support structure 122 to the bendable region 103 can be increased, and the crease can be reduced.
In addition, when the first supporting structure 121 is disposed in the accommodating recess 012 of the first supporting structure 122, the second adhesive layer 152 is located at a side of the accommodating recess 012 away from the display function layer 110, as shown in fig. 11, when the first supporting structure 121 extends toward the first flat region 101 and the second flat region 102 along the first direction X, under the action of the second adhesive layer 152, the second supporting structure 122 tends to approach the first flat region 101 and the second flat region 102 along the first direction X, and the second supporting structure 122 can pull each film layer in the bendable region 103 including the display function layer 110 and tends to approach the first flat region 101 and the second flat region 102 along the first direction X; and when the bendable display screen 10 is bent, the second bonding layer 152 is squeezed to fill the gap between the first supporting structure 122 and the sidewall of the accommodating groove 012, so as to prevent the gap from collapsing and improve the flatness of the bendable display screen 10.
Optionally, fig. 12 is a schematic diagram of a film structure of another bendable display screen according to an embodiment of the present invention, referring to fig. 12, the supporting structure 120 further includes a third supporting structure 123, and the third supporting structure 123 is located between the first supporting structure 121 and the second supporting structure 122; at least a portion of the third support structure 123 is located in the bendable region 103; the third support structure 123 has a larger plastic deformation than the first support structure 121. In the first state, the third support structure 123 has a thickness H3 along the second direction Y; in the second state, the third support structure 123 has a thickness H4 along the second direction Y; wherein H4 > H3; the second direction Y is parallel to the thickness direction of the display functional layer 110.
Illustratively, when the bendable display screen 10 is bent, the bendable region 103 of the bendable display screen 10 is switched from a straight state to a bent state, and in the bent state, the third supporting structure 123 located in the bendable region 103 is stressed to deform, and after the bendable display screen is restored to the straight state, the third supporting structure 123 becomes thicker along the second direction Y. Along with the increase of the bending times of the bendable display screen 10, the thickness of the third supporting structure 123 along the second direction Y increases in the straight state, that is, along with the increase of the bending times of the bendable display screen 10, the third supporting structure 123 gradually thickens along the second direction Y in the straight state. When the third supporting structure 122 is thickened along the second direction Y, the third supporting structure 123 includes a fifth acting force that is jacked up along the second direction Y toward the display function layer side, so as to drive the first supporting structure 121 to have an upwardly arched acting force. Therefore, the support property of the support structure 120 for the bendable display screen 10 can be improved, the crease of the bendable region 103 can be offset, and the flatness of the bendable display screen 10 can be improved.
Optionally, fig. 13 is a schematic diagram of a film structure of a bendable display panel according to an embodiment of the present invention, and fig. 14 is a schematic diagram of a film structure of a bendable display panel according to an embodiment of the present invention, referring to fig. 13 and 14, the second support structure 122 includes a first pattern region 021, and the first pattern region 021 includes a plurality of first grooves 022 and/or a plurality of first through holes 023; the first pattern region 021 is located in the bendable region 103; the first support structure 121 covers the first pattern region 021 in the thickness direction of the display functional layer 110.
For example, in the second direction Y, the second bonding layer 152 may overlap with or not overlap with the first pattern region 021, and does not affect the extension of the first supporting structure 121 toward the first flat region 101 and the second flat region 102 along the first direction X, and does not affect the tendency of each film layer including the display functional layer 110 in the bendable region 103 to approach the first flat region 101 and the second flat region 102 along the first direction X. By disposing the first pattern area 021 on the second supporting structure 122, and the first pattern area 021 includes a plurality of first grooves 022 and/or a plurality of first through holes 023, the flexibility of the second supporting structure 122 can be increased, the requirement of the flexibility of the material itself of the second supporting structure 122 is reduced, the second supporting structure 122 can be made of a hard metal, and the first supporting structure 121 can be made of a soft metal.
It should be noted that the first groove 022 of the first pattern region 021 may be located on a side of the second support structure 122 close to the display functional layer 110, or located on a side of the second support structure 122 far from the display functional layer 110, which is not specifically limited in the embodiment of the present invention; in addition, the shapes of the first groove 022 and the first through hole 023 and the internal fillers thereof are not particularly limited by the embodiment of the invention.
Optionally, fig. 15 is a schematic diagram of a film structure of another support structure provided by the embodiment of the present invention, fig. 16 is a schematic diagram of a film structure of another support structure provided by the embodiment of the present invention, and fig. 17 is a schematic diagram of a top structure of another support structure provided by the embodiment of the present invention, referring to fig. 15-17, the first support structure 121 includes a second pattern region 031, and the second pattern region 031 includes a plurality of second grooves 032 and/or a plurality of second through holes 033; the second pattern region 031 is located in the bendable region 103; the second pattern region 031 overlaps the first pattern region 021 in the thickness direction of the display function layer 110. Through setting up second pattern area 031 at first support structure 121, and second pattern area 031 includes a plurality of second recess 032 and/or a plurality of second through-hole 033, can increase the bendability of first support structure 121, reduced the requirement to the bendability of the material itself of first support structure 121.
It should be noted that the second groove 032 of the second design region 031 can be located on a side of the first supporting structure 121 close to the display function layer 110, or on a side of the first supporting structure 121 far from the display function layer 110, which is not specifically limited in the embodiment of the present invention; in addition, the shape of the second groove 032 and the second through hole 033 and the internal filler thereof are not particularly limited in the embodiments of the present invention.
Alternatively, fig. 18 is a schematic diagram of a film structure of another support structure provided by an embodiment of the invention, fig. 19 is a schematic diagram of a film structure of another support structure provided by an embodiment of the invention, and referring to fig. 18 and fig. 19, in a thickness direction of the functional layer 110, at least a portion of the first groove 022 and/or the first through hole 023 and at least a portion of the second groove 032 and/or the second through hole 033 do not overlap with each other. Exemplarily, in the second direction Y, the first groove 022 and/or the first through hole 023, the second groove 032 and/or the second through hole 033 may be staggered from each other, so as to improve the support of the support structure 120, further reduce the folding mark, and improve the flatness of the bendable display screen 10.
Based on the same inventive concept, an embodiment of the invention further provides a bendable display device, fig. 20 is a schematic structural diagram of the bendable display device according to the embodiment of the invention, and as shown in fig. 20, the bendable display device 300 includes the bendable display screen 10 according to any embodiment of the invention. The bendable display device 300 provided by the embodiment of the invention can be a mobile phone shown in fig. 20, and can also be any electronic product with a display function, including but not limited to the following categories: the touch screen display system comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal and the like, and the embodiment of the invention is not particularly limited in this respect.
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 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 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 (11)
1. A bendable display screen, comprising: a first flat region, a second flat region, and a bendable region connecting the first flat region and the second flat region;
the bendable display screen also comprises a display function layer and a support structure; the support structure comprises a first support structure and a second support structure; the first support structure is located between the display functional layer and the second support structure;
at least part of the first support structure and at least part of the second support structure are located in the bendable region; the first support structure has a greater plastic deformation than the second support structure;
when the bendable display screen is bent, the bendable area of the bendable display screen is switched from a straight state to a bent state; the bendable display screen comprises a first state and a second state; in the first state, the bending frequency of the bendable display screen is M, and the length of the first support structure along the first direction is L1; in the second state, the bending frequency of the bendable display screen is N, and the length of the first support structure along the first direction is L2; wherein N is more than M, and L2 is more than L1; the first direction is parallel to the arrangement direction of the first flat area, the second flat area and the bendable area.
2. The flexible display screen of claim 1, wherein a side surface of the second support structure adjacent to the display function layer is a first surface; the first surface comprises an accommodating groove arrangement area; the accommodating groove arrangement area is provided with an accommodating groove; the first supporting structure is located in the accommodating groove.
3. The flexible display screen of claim 2, wherein a side surface of the first support structure adjacent to the display function layer is a second surface; the first surface further comprises non-groove setting areas positioned on two opposite sides of the accommodating groove setting area; the second support structure further comprises a third surface facing away from the display functional layer;
when the bendable region of the bendable display screen is in the flat state, the maximum distance between the second surface and the third surface is H1; the distance between the first surface and the third surface of the non-groove arrangement region is H2; wherein 0 is not less than H1-H2 is not less than 150 μm.
4. The flexible display of claim 3, wherein the flexible display further comprises a third state; in the third state, a maximum distance H1 between the second surface and the third surface is equal to a distance H2 between the first surface and the third surface of the non-groove disposing region; the distance d between the first supporting structure and the side wall of the accommodating groove is greater than or equal to 0.
5. The flexible display of claim 1, further comprising a first adhesive layer; the first bonding layer is located between the display function layer and the support structure, and the surface of the first bonding layer close to one side of the first support structure is in contact with the first support structure.
6. The flexible display screen of claim 1, further comprising: a second adhesive layer; the second bonding layer is located between the first support structure and the second support structure; and the surface of the second bonding layer close to one side of the first supporting structure is contacted with the first supporting structure, and the surface of the second bonding layer close to one side of the second supporting structure is contacted with the second supporting structure.
7. The flexible display of claim 1, wherein the support structure further comprises a third support structure; the third support structure is located between the first support structure and the second support structure; at least part of the third support structure is positioned in the bendable region; the third support structure has a greater plastic deformation than the first support structure;
in the first state, the third support structure has a thickness H3 in the second direction; in the second state, the third support structure has a thickness H4 along the second direction; wherein H4 > H3; the second direction is parallel to a thickness direction of the display functional layer.
8. The flexible display of claim 1, wherein the second support structure comprises a first design area; the first pattern region includes a plurality of first recesses and/or a plurality of first through holes; the first pattern area is positioned in the bendable area; the first support structure covers the first pattern region in a thickness direction of the display functional layer.
9. The flexible display screen of claim 8, wherein the first support structure comprises a second patterned area; the second pattern region includes a plurality of second recesses and/or a plurality of second through holes; the second pattern area is positioned in the bendable area; the second pattern region overlaps the first pattern region in a thickness direction of the display functional layer.
10. The bendable display screen of claim 9, wherein at least a portion of the first grooves and/or the first through holes and at least a portion of the second grooves and/or the second through holes do not overlap each other in a thickness direction of the display functional layer.
11. A flexible display device comprising the flexible display panel according to any one of claims 1 to 10.
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| CN202210763753.2A CN115050266B (en) | 2022-06-29 | 2022-06-29 | Bendable display screen and bendable display device |
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| CN202210763753.2A CN115050266B (en) | 2022-06-29 | 2022-06-29 | Bendable display screen and bendable display device |
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| CN109427980A (en) * | 2017-08-24 | 2019-03-05 | 上海和辉光电有限公司 | A kind of flexible display panels and flexible display apparatus |
| US20200319043A1 (en) * | 2019-04-02 | 2020-10-08 | Sensel, Inc. | Perforated support layer that facilitates static and dynamic bending |
| CN113241010A (en) * | 2021-05-25 | 2021-08-10 | 合肥维信诺科技有限公司 | Display panel and display device |
| US20220103670A1 (en) * | 2019-02-01 | 2022-03-31 | Huawei Technologies Co., Ltd. | Support sheet used for foldable terminal device and foldable terminal device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109427980A (en) * | 2017-08-24 | 2019-03-05 | 上海和辉光电有限公司 | A kind of flexible display panels and flexible display apparatus |
| US20220103670A1 (en) * | 2019-02-01 | 2022-03-31 | Huawei Technologies Co., Ltd. | Support sheet used for foldable terminal device and foldable terminal device |
| US20200319043A1 (en) * | 2019-04-02 | 2020-10-08 | Sensel, Inc. | Perforated support layer that facilitates static and dynamic bending |
| WO2020206079A1 (en) * | 2019-04-02 | 2020-10-08 | Sensel, Inc. | Perforated support layer that facilitates static and dynamic bending |
| CN113241010A (en) * | 2021-05-25 | 2021-08-10 | 合肥维信诺科技有限公司 | Display panel and display device |
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