CN108962031B - Display panel and display device - Google Patents
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- CN108962031B CN108962031B CN201810818487.2A CN201810818487A CN108962031B CN 108962031 B CN108962031 B CN 108962031B CN 201810818487 A CN201810818487 A CN 201810818487A CN 108962031 B CN108962031 B CN 108962031B
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- 238000005452 bending Methods 0.000 claims abstract description 88
- 239000000758 substrate Substances 0.000 claims abstract description 49
- 239000010410 layer Substances 0.000 claims description 75
- 239000012790 adhesive layer Substances 0.000 claims description 23
- 238000002955 isolation Methods 0.000 claims description 8
- 230000017525 heat dissipation Effects 0.000 claims description 7
- 239000004642 Polyimide Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- -1 polyethylene terephthalate Polymers 0.000 claims description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
- 239000011112 polyethylene naphthalate Substances 0.000 claims description 2
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 claims 1
- 239000010408 film Substances 0.000 description 100
- 238000010586 diagram Methods 0.000 description 14
- 239000010409 thin film Substances 0.000 description 8
- 239000002184 metal Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The embodiment of the invention discloses a display panel, which comprises: a flexible substrate; the display unit is positioned on the surface of the display area of the flexible substrate; the first film is positioned on one side, away from the display unit, of the flexible substrate and comprises a first area corresponding to a display area of the display panel, a second area corresponding to a folding area in a frame area of the display panel and a third area corresponding to a non-folding area in the frame area of the display panel; the display area of the display panel is provided with at least one bending area; the thickness d1 of the first region, the thickness d2 of the second region and the thickness d3 of the third region in the first film meet the requirements that d2 is larger than d1 and is smaller than d3, so that the frame region can be bent, the area of the frame region is reduced, the display region can be bent, and the increasingly diversified display requirements of users are met.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
With the development of display technology, more and more flexible display panels are applied to people's daily life. The bending area of the existing flexible display panel only exists in the frame area of the display panel, so that the frame area of the display panel is bent through the bending area, the area of the frame area of the display panel is reduced, and a narrow frame is realized. Meanwhile, in order to bend the display area of the flexible display panel, a foldable display is manufactured, so that the increasingly diversified display requirements of users are met, and the flexible display is a key development direction in the display field.
Disclosure of Invention
In order to solve the above technical problems, embodiments of the present invention provide a display panel and a display device including the display panel, so as to implement bending of a frame region, reduce an area of the frame region, and implement bending of a display region, thereby meeting increasingly diversified display requirements of users.
In order to solve the above problems, the embodiments of the present invention provide the following technical solutions:
a display panel, comprising:
a flexible substrate;
the display unit is positioned on the surface of the display area of the flexible substrate;
the first film is positioned on one side, away from the display unit, of the flexible substrate and comprises a first area corresponding to a display area of the display panel, a second area corresponding to a folding area in a frame area of the display panel and a third area corresponding to a non-folding area in the frame area of the display panel;
the display area of the display panel is provided with at least one bending area; the thickness d1 of the first region, the thickness d2 of the second region and the thickness d3 of the third region in the first film satisfy d2 < d1 < d 3.
Compared with the prior art, the technical scheme has the following advantages:
in the display panel provided in the embodiment of the present invention, the thickness of the first film in the second area corresponding to the folding area in the frame area is the smallest, so that the bending radius of the bending area is reduced on the basis of bending the frame area of the display panel through the bending area to reduce the area of the frame area of the display panel, thereby reducing the occupied area of the bending area and further reducing the area of the frame area of the display panel.
In the display panel provided in the embodiment of the present invention, the thickness of the third area, corresponding to the non-folding area of the frame area, of the first film is greater than the thickness of the first area corresponding to the display area, so that the bending axis of the display panel is controlled in the display area of the display panel during the process of bending the display area of the display panel, and the bending of the display area of the display panel is realized, so as to meet the increasingly diversified display requirements of users.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display panel according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a display panel according to another embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a display panel according to another embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;
fig. 7 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;
fig. 9 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;
fig. 10 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;
fig. 11 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;
fig. 12 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;
fig. 13 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;
fig. 14 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;
fig. 15 is a schematic view illustrating a bending configuration of a display panel according to an embodiment of the invention.
Detailed Description
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.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
The bending area of the existing flexible display panel only exists in the frame area of the display panel, and the bending of the display area is difficult to realize, so that the increasingly diversified display requirements of users cannot be met.
This is because the conventional flexible display panel includes a flexible substrate and a display unit located on the surface of the display area of the flexible substrate, and further includes a lower film located on a side of the flexible substrate facing away from the display unit, so as to improve the support strength of the flexible substrate. However, the thickness of the lower adhesive film in the conventional flexible display panel is large, so that when the display area of the conventional flexible display panel is bent, large stress is applied to the display unit, and the display unit in the flexible display panel or the electrical connection relationship of the display unit is broken in the bending process, so that the flexible display panel fails to work normally.
The inventor finds that if the thickness of the lower film is reduced as a whole, the supporting strength of the lower film to the flexible substrate is greatly reduced, and the bending axis of the flexible display panel is not easy to control, so that the bending area is easy to shift.
In view of the above, the inventors have conducted extensive studies and have proposed a display panel, as shown in fig. 1, including: a flexible substrate 10; a display unit (not shown) located on the surface of the display area of the flexible substrate 10; the first film 20 is located on a side of the flexible substrate 10 facing away from the display unit, and the first film 20 includes a first area 100 corresponding to a display area of the display panel, a second area 200 corresponding to a folding area in a frame area of the display panel, and a third area 300 corresponding to a non-folding area in the frame area of the display panel; the display area of the display panel is provided with at least one bending area; the thickness d1 of the first region, the thickness d2 of the second region and the thickness d3 of the third region in the first film satisfy d2 < d1 < d 3.
In the display panel provided in the embodiment of the present invention, the thickness of the first film 20 corresponding to the second region 200 of the folding region in the frame region is the smallest, so that the bending radius of the bending region is reduced on the basis of bending the frame region of the display panel through the bending region to reduce the area of the frame region of the display panel, thereby reducing the occupied area of the bending region and further reducing the area of the frame region of the display panel. Optionally, as shown in fig. 1, in an embodiment of the present invention, the second region 200 is spaced from the first region 100 by a certain distance, and the third region 300 is divided into two parts, that is, the third region 300 includes a first sub-region located on a side of the second region 200 facing away from the first region 100 and a second sub-region located on a side of the second region 200 facing toward the first region 100. It should be noted that, the distance between the second region 200 and the first region 100 is not limited in the present invention, that is, the width of the second sub-region is not limited in the present invention, which is determined as the case may be.
In the display panel provided in the embodiment of the present invention, the thickness of the third area 300 of the first film 20 corresponding to the non-folding area of the frame area is greater than the thickness of the first area 100 corresponding to the display area, so that the thickness of the first area 100 of the first film 20 is reduced to reduce the stress on the display unit during the bending process of the display panel, thereby avoiding the display unit in the flexible display panel or the phenomenon that the electrical connection relationship of the display unit is broken during the bending process, and reducing the probability that the flexible display panel fails and cannot normally operate, but the thickness of the third area 300 of the first film 20 is not reduced, so that the thickness of the third area 300 of the first film 20 is used to ensure the supporting strength of the first film thickness 10 on the flexible substrate 100.
In addition, since the smaller the thickness of the display panel is, the more easily the display panel is bent, in the display panel provided in the embodiment of the present invention, the thickness of the third area 300 of the first film 20 corresponding to the non-folding area of the bezel area is greater than the thickness of the first area 100 corresponding to the display area, so that it is beneficial to control the bending axis of the display panel in the display area of the display panel during the process of bending the display area of the display panel, and the bending of the display area of the display panel is realized, so as to meet the increasingly diversified display requirements of users.
Therefore, the display panel provided by the embodiment of the invention can display the bending of the frame area and can realize the bending of the display area.
On the basis of the above embodiment, in an embodiment of the present invention, as shown in fig. 2, the display panel provided in the embodiment of the present invention further includes: and the second film 30 covers the display unit and encapsulates the display unit, and the second film 30 is used for preventing water and oxygen in the external environment from entering the area where the display unit is located and influencing the normal work of the display unit. It should be noted that, in the embodiment of the present invention, the orthographic projection of the second film 30 on the display panel may be overlapped with the first area 100, or may be larger than the first area 100, which is not limited in the present invention, as long as the orthographic projection of the second film 30 on the display panel is ensured to completely cover the first area 100.
In another embodiment of the present invention, the display panel may further include a first control electrode layer and a second control electrode layer electrically connected to the display unit, and a film structure such as an insulating layer electrically insulating the first control electrode layer and the second control electrode layer.
It should be further noted that, in the embodiment of the present invention, the display panel may be an OLED display panel or an LCD display panel, which is not limited in this respect, and is determined as the case may be.
On the basis of the above embodiment, as shown in fig. 3, in an embodiment of the present invention, in a boundary region between the third region 300 and the first region 100, along a direction from the third region 300 to the first region 300, a thickness of the first film 20 is gradually reduced to reduce stress at the boundary region between the third region 300 and the first region 100, so as to avoid an excessive stress at the boundary region between the third region 300 and the first region 100 and an excessive bending phenomenon.
On the basis of any of the above embodiments, as shown in fig. 4, in an embodiment of the present invention, in a boundary region between the third region 300 and the second region 200, along a direction from the third region 300 to the second region 200, a thickness of the first film 20 is gradually reduced to reduce a stress at the boundary region between the third region 300 and the second region 200, so as to avoid an excessive bending phenomenon occurring when the stress at the boundary region between the third region 300 and the second region 200 is too large.
In addition to the above embodiments, in an embodiment of the present invention, as shown in fig. 4, in a boundary region between the third region 300 and the second region 200, the gradually decreasing thickness of the first film 20 along a direction from the third region 300 to the second region 200 includes: taking the central axis of the second region 200 as a boundary, in a portion of a boundary region between the third region 300 and the second region 200, the portion being located on the first side of the central axis of the second region 200, and along a direction from the portion of the third region 300, located on the first side of the central axis of the second region 200, to the second region 200, the thickness of the first film 20 is gradually reduced; taking the central axis of the second region 200 as a boundary, in a portion of a boundary region between the third region 300 and the second region 200, which is located on the second side of the central axis of the second region 200, the thickness of the first film 20 is gradually reduced along a direction from the portion of the third region 300, which is located on the second side of the central axis of the second region 200, to the second region 200, wherein the second side is a side of the second region facing the first region, and the first side is a side of the second region facing away from the first region.
In addition to any of the above embodiments, in an embodiment of the present invention, as shown in fig. 5, in a boundary region between the third region 300 and the first region 100, the thickness of the first film 20 gradually decreases along a direction from the third region 300 to the first region 300, and in a boundary region between the third region 300 and the second region 200, the thickness of the first film 20 gradually decreases along a direction from the third region 300 to the second region 200.
On the basis of any of the above embodiments, in an embodiment of the present invention, an included angle between a tangent line of any point on an intersection line between the boundary region and the flexible substrate ranges from 30 ° to 60 °, inclusive, so as to avoid a larger area occupied by the bending region in the frame region and/or the display region on the basis of reducing stress of the boundary region and avoiding an excessive bending phenomenon due to an excessive stress of the boundary region.
Specifically, on the basis of any one of the above embodiments, in an embodiment of the present invention, the radius of curvature of the bending region in the frame region is not greater than 0.35mm, that is, the radius of curvature of the bending region in the second region is not greater than 0.35 mm; the radius of curvature of the bending region in the display area is not less than 1mm, that is, the radius of curvature of the bending region in the first area is not less than 1mm, but the present invention is not limited thereto, as the case may be.
On the basis of any of the above embodiments, in an embodiment of the present invention, the bending stiffness of the third region in the display panel is at least 5 times of the bending stiffness of the second region, so as to ensure that the bending region in the frame region can be bent. Optionally, in an embodiment of the present invention, a ratio of the bending stiffness of the third region to the bending stiffness of the second region in the display panel ranges from 5 to 10, inclusive, but the present invention is not limited thereto, and in other embodiments of the present invention, the bending stiffness of the third region in the display panel may also be other multiples of the bending stiffness of the second region, as long as the bending stiffness of the third region in the display panel is at least 5 times of the bending stiffness of the second region.
In the embodiment of the present invention, the bending stiffness of the third region in the display panel is the bending stiffness of the display panel corresponding to the third region, and the bending stiffness of the second region in the display panel is the bending stiffness of the display panel corresponding to the second region.
Specifically, on the basis of any of the above embodiments, in an embodiment of the present invention, the material of the first film is polyethylene terephthalate (PET), polyethylene naphthalate (PEN), Polycarbonate (PC), or Polyimide (PI), but the present invention is not limited thereto, as long as the first film is ensured to have a low cost and a simple process, and the first film can provide the flexible substrate with the required support strength.
On the basis of the above embodiment, in an embodiment of the present invention, the thickness of the third region in the first thin film is greater than or equal to 35 μm, so as to ensure the supporting strength of the first thin film; the thickness of the second area in the first film ranges from 0 μm to 20 μm inclusive, so as to reduce the acting force when the second area is bent; the width of the second region in the first film ranges from 800 μm to 1600 μm, including the end points, so as to reduce the occupied area of the second region on the basis of ensuring that the frame region can be bent. Wherein the width of the second region in the first film refers to the dimension of the second region along the direction from the second region to the first region.
On the basis of any of the above embodiments, in an embodiment of the present invention, the thickness of the first region ranges from 20 μm to 50 μm, so that the display area of the display panel can be bent by setting the thickness of the first region to be smaller than the thickness of the third region, and by setting the thickness of the first region to be greater than 20 μm, on the basis of realizing that the display area of the display panel can be bent, the support strength of the first film on the display area of the display panel is ensured, and meanwhile, the bending curvature radius of the display area of the display panel is prevented from being too small, so that when the display area of the display panel is bent, a large stress is applied to the display unit, and the display unit in the display panel or the electrical connection relationship between the display unit is broken during the bending process, thereby causing the failure of the display panel, and the normal work can not be realized. However, the present invention is not limited thereto, as the case may be.
Optionally, on the basis of the above embodiment, in an embodiment of the present invention, as shown in fig. 6, a thickness of the second area 200 in the first film 20 is zero, so as to reduce a bending acting force applied when the second area 200 in the display panel is bent, and to implement one-time bending of the frame area of the display panel, that is, the frame area of the display panel can be bent by one-time bending.
Specifically, in an embodiment of the present invention, the display area of the display panel sequentially includes, along the first direction: the flexible substrate comprises a first film, a flexible substrate, an inorganic film layer, a metal electrode layer, a planarization layer and a light emitting layer, wherein the inorganic film layer is arranged on one side of the flexible substrate, the metal electrode layer is arranged on one side of the inorganic film layer, the planarization layer is arranged on one side of the planarization layer, the light emitting layer is arranged on one side of the metal electrode layer, the light emitting layer is arranged on one side of the planarization layer, the second film is arranged on one side of the planarization layer, the polarizing layer is arranged on one side of the planarization layer, and the polarizing layer is arranged on one side of the protective layer on one side of the second film. Optionally, the planarization layer is an organic film layer. Wherein the first direction is parallel to the direction in which the first thin film points to the flexible substrate.
The display area of the display panel sequentially comprises along a first direction: the flexible substrate comprises a first film, a flexible substrate, a first organic film layer, a metal routing layer, a second organic film layer and a waterproof layer, wherein the flexible substrate deviates from the first organic film layer on one side of the first film, the organic film layer deviates from the metal routing layer on one side of the flexible substrate, the metal routing layer deviates from the second organic film layer on one side of the first organic film layer, and the second organic film layer deviates from the waterproof layer on one side of the metal routing layer. Optionally, the waterproof layer is a UV glue layer. Wherein the first direction is parallel to the direction in which the first thin film points to the flexible substrate.
As shown in table 1, table 1 shows the ratios of the bending stiffness of the third region of the display panel to the bending stiffness of the second region when the thickness of the third region of the first film is 75 μm, 30 μm, 35 μm, and 50 μm, respectively, when the thickness of the second region of the first film is zero in the above display panel.
Table 1:
in the embodiment of the present invention, when the thickness of the second region in the first film is zero, the bending stiffness of the third region of the display panel is the bending stiffness of the third region corresponding to the entire structure of the display panel, and the bending stiffness of the second region is also the bending stiffness of the second region corresponding to the entire structure of the display panel (i.e., the bending stiffness of the entire structure of the display panel excluding the first film).
Optionally, on the basis of the above embodiment, in a preferred embodiment of the present invention, the thickness of the third region of the first thin film is 50 micrometers, the thickness of the second region is 0 micrometer, and the bending stiffness of the third region in the display panel is 10 times of the bending stiffness of the second region.
It should be noted that, when the material of the first film is determined, the tensile modulus thereof is a fixed value, and therefore, in the embodiment of the present invention, when the ratio between the bending stiffness of the third region and the bending stiffness of the second region in the display panel is determined, the thicknesses of the third region and the second region in the first film can be calculated and obtained according to the tensile modulus of the first film and the ratio between the bending stiffness of the third region and the bending stiffness of the second region in the display panel.
On the basis of any of the above embodiments, in an embodiment of the present invention, as shown in fig. 7, the first film 20 includes a support film layer 22 and a first adhesive layer 21 that are stacked to provide a support strength to the flexible substrate 10 by using the support film layer 22, and to realize a fixed connection between the support film layer 22 and the flexible substrate 10 by using the first adhesive layer 21.
Specifically, on the basis of the above embodiment, in an embodiment of the present invention, the thickness of the supporting film layer corresponding to the third region is not less than 25 μm, so as to reduce the thickness of the first film on the basis of ensuring the supporting strength of the supporting film layer, thereby reducing the thickness of the display panel; the thickness of the first bonding layer corresponding to the third area is not less than 10 microns, so that the thickness of the first bonding layer is reduced on the basis of ensuring that the first bonding layer fixedly bonds the support film layer and the flexible substrate, and the thickness of the display panel is reduced.
As shown in table 2, table 2 shows that when the thickness of the second region in the first film in table 1 is zero, and the thickness of the third region in the first film is 75 μm, 30 μm, 35 μm, and 50 μm, respectively, the thickness of the support film layer and the first adhesive layer takes on values.
Table 2:
optionally, on the basis of the foregoing embodiment, in a preferred embodiment of the present invention, the thickness of the supporting film layer ranges from 25 μm to 50 μm, inclusive; the thickness of the first adhesive layer ranges from 10 μm to 15 μm inclusive, but the invention is not limited thereto, as the case may be.
On the basis of any one of the above embodiments, in an embodiment of the present invention, the first film further includes a heat dissipation film layer located on a side of the support film away from the flexible substrate, so as to dissipate heat generated by the display panel.
It should be noted that, since the display unit in the display panel mainly emits light to generate relatively large heat, in an embodiment of the present invention, on the basis of the above embodiment, an orthographic projection of the heat dissipation film layer on the flexible substrate is overlapped with an orthographic projection of the display area of the display panel on the flexible substrate, so as to reduce an area of the heat dissipation film layer and reduce a cost of the heat dissipation film layer, but the present invention is not limited thereto, and is determined as the case may be.
On the basis of any one of the above embodiments, in an embodiment of the present invention, the first film further includes an electrostatic isolation film layer located on a side of the support film facing away from the flexible substrate, so as to isolate the conductor of the first film facing away from the display unit.
On the basis of the above embodiment, in an embodiment of the present invention, the display panel further includes: the touch module is used for realizing the touch function on the basis of the display panel.
It should be noted that, because the conductor in the external environment mainly affects the control of the display unit in the display panel and the operation of the touch module, on the basis of the above embodiment, in an embodiment of the present invention, an orthographic projection of the electrostatic isolation film layer on the flexible substrate is overlapped with an orthographic projection of the display area of the display panel on the flexible substrate, so as to reduce the area of the electrostatic isolation film layer and reduce the cost of the electrostatic isolation film layer, but the present invention is not limited thereto, and is determined as the case may be.
It should be further noted that, on the basis of the above embodiments, in an embodiment of the present invention, when the first film includes both a heat dissipation film layer and an electrostatic isolation film layer, the heat dissipation film layer may be located on a side of the electrostatic isolation film layer facing the flexible substrate, or on a side of the electrostatic isolation film layer facing away from the flexible substrate, which is not limited in this respect, and is determined as the case may be.
On the basis of any of the above embodiments, in an embodiment of the present invention, as shown in fig. 8, the third region includes a first sub-region 301 located on a side of the second region 200 facing away from the first region 100 and a second sub-region 302 located on a side of the second region 200 facing toward the first region 100; the first film further includes:
the second adhesive layer 23 is located on a side of the second sub-region 302 departing from the flexible substrate 10, and the second adhesive layer 23 is used for adhering the first sub-region 301 and the second sub-region 302 after the second region 200 is folded, so as to fix a bending form of the frame region of the display panel.
It should be noted that, on the basis of the above-mentioned embodiment, in an embodiment of the present invention, as shown in fig. 8, the thicknesses of the first sub-region 301 and the second sub-region 302 are different; in another embodiment of the present invention, as shown in fig. 9, the thicknesses of the first sub-region 301 and the second sub-region 302 may also be the same, and the present invention is not limited thereto, as the case may be.
It should be further noted that, when the thicknesses of the first sub-area 301 and the second sub-area 302 are the same, in an embodiment of the present invention, as shown in fig. 10, the sum d4 of the thicknesses of the support film layer 22 and the first adhesive layer 21 in the second sub-area 302 may be the same as the sum d5 of the thicknesses of the support film layer 22 and the first adhesive layer 21 in the first area 100; in another embodiment of the present invention, as shown in fig. 9, the sum d4 of the thicknesses of the support film layer 22 and the first adhesive layer 21 in the second sub-region 302 may be different from the sum d5 of the thicknesses of the support film layer 22 and the first adhesive layer 21 in the first region 100, which is not limited by the present invention, and is determined by the thickness of the second adhesive layer 23.
On the basis of the above embodiment, when the sum d4 of the thicknesses of the support film layer 22 and the first adhesive layer 21 in the second sub-region 302 may be the same as the sum d5 of the thicknesses of the support film layer 22 and the first adhesive layer 21 in the first region 100, in an embodiment of the invention, as shown in fig. 11, in the boundary region between the third region 300 and the second region 200, the gradually decreasing thickness of the first film 20 along the direction from the third region 300 to the second region 200 includes: in the boundary region between the first sub-region 301 and the second region 200, the thickness of the first thin film 20 gradually decreases along the direction from the first sub-region 301 to the second region 200.
In another embodiment of the present invention, as shown in fig. 12, in the boundary region between the third region 300 and the second region 200, the gradually decreasing thickness of the first film 20 along the direction from the third region 300 to the second region 200 includes: in the boundary region between the first sub-region 301 and the second region 200, the thickness of the first thin film 20 gradually decreases along the direction from the first sub-region 301 to the second region 200; in the boundary region between the second sub-region 302 and the second region 200, the thickness of the first thin film 20 gradually decreases along the direction from the second sub-region 302 to the second region 200.
On the basis of any of the above embodiments, in an embodiment of the present invention, after the display panel is folded by taking the central axis of the second region as a folding line, a projection of the second adhesive layer on the flexible substrate at least covers a projection of the first sub-region on the flexible substrate, so that the second adhesive layer is used to realize adhesive fixation of all regions of the first sub-region, and the connection firmness between the first sub-region and the second sub-region is enhanced.
On the basis of the foregoing embodiment, in an embodiment of the present invention, after the display panel is folded by taking the central axis of the second region as a folding line, a projection of the second adhesive layer on the flexible substrate coincides with a projection of the first sub-region on the flexible substrate, so that on the basis of utilizing the second adhesive layer to achieve the maximum enhancement of the firmness between the first sub-region and the second sub-region, the usage amount of the second adhesive layer is reduced, and the cost of the second adhesive layer is reduced.
On the basis of any of the above embodiments, in an embodiment of the present invention, as shown in fig. 13 and 14, after the display panel is folded by using the central axis of the second region 200 as a folding line, the orthographic projection of the second adhesive layer 23 on the flexible substrate 10 extends to cover the partial projection of the second region 200, so that the bending position of the second region 200 is defined by using the portion of the second adhesive layer 23 extending into the second region 200 as a bending auxiliary member, thereby preventing the bending region of the frame region in the display panel from being shifted to generate an over-bending phenomenon.
It should be noted that, on the basis of any of the above embodiments, in an embodiment of the present invention, as shown in fig. 15, the display area of the display panel may include only one bending area, that is, in an embodiment of the present invention, the display panel includes one first bending area 400 located in the second area and one second bending area 500 located in the display area; in another embodiment of the present invention, the display area of the display panel may also include at least two bending areas, that is, in the embodiment of the present invention, the display panel includes one first bending area 400 located in the second area and at least two second bending areas 500 located in the display area; the present invention is not limited in this regard, as the case may be.
Correspondingly, the embodiment of the invention also provides a display device comprising the display panel provided by any one of the embodiments. Specifically, in one embodiment of the present invention, the display device includes: the display panel provided by any of the above embodiments, and a display control circuit for controlling each display unit in the display panel to operate. In another embodiment of the present invention, when the display panel includes a touch module, the display device further includes a touch control circuit for controlling the touch module to operate.
In summary, the display panel and the display device provided in the embodiments of the present invention can not only achieve bending of the frame region and reduce the area of the frame region, but also achieve bending of the display region, thereby meeting increasingly diversified display requirements of users.
In the description, each part is described in a progressive manner, each part is emphasized to be different from other parts, and the same and similar parts among the parts are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (12)
1. A display panel, comprising:
a flexible substrate;
the display unit is positioned on the surface of the display area of the flexible substrate;
the first film is positioned on one side, away from the display unit, of the flexible substrate and comprises a first area corresponding to a display area of the display panel, a second area corresponding to a folding area in a frame area of the display panel and a third area corresponding to a non-folding area in the frame area of the display panel;
the display area of the display panel is provided with at least one bending area; the thickness d1 of the first region, the thickness d2 of the second region and the thickness d3 of the third region in the first film satisfy d2 < d1 < d 3;
the third area comprises a first sub-area positioned on one side of the second area, which is far away from the first area, and a second sub-area positioned on one side of the second area, which is far towards the first area; the first film further includes: the second adhesive layer is used for bonding the first sub-region and the second sub-region after the second region is folded, and the display panel is used for extending the orthographic projection on the flexible substrate to cover the partial projection of the second region after the central axis of the second region is folded by a folding line.
2. The display panel according to claim 1, wherein a thickness of the first film is gradually reduced in a direction from the third region to the first region at an interface region between the third region and the first region.
3. The display panel according to claim 1, wherein a thickness of the first film is gradually reduced in a direction from the third region to the second region at an interface region between the third region and the second region.
4. The display panel according to claim 2 or 3, wherein an included angle between a tangent line of any point on the boundary between the boundary region and the flexible substrate ranges from 30 ° to 60 °, inclusive.
5. The display panel according to claim 1, wherein the thickness of the first region ranges from 20 μm to 50 μm.
6. The display panel according to claim 1, wherein the bending stiffness of the third region is at least 5 times the bending stiffness of the second region in the display panel.
7. The display panel according to claim 6, wherein a material of the first film is polyethylene terephthalate, polyethylene naphthalate, polycarbonate, or polyimide.
8. The display panel according to claim 7, wherein the thickness of the third region in the first film is greater than or equal to 35 μm; the thickness of the second region in the first film ranges from 0 μm to 20 μm inclusive; the width of the second region in the first film ranges from 800 μm to 1600 μm, inclusive.
9. The display panel according to any one of claims 1 to 3 or 5 to 8, wherein the first film comprises a support film layer and a first adhesive layer which are laminated.
10. The display panel according to claim 9, wherein the thickness of the support film layer corresponding to the third region is not less than 25 μm; the thickness of the first bonding layer corresponding to the third area is not less than 10 μm.
11. The display panel according to claim 9, wherein the first film further comprises a heat dissipation film layer and/or an electrostatic isolation film layer on a side of the support film layer facing away from the flexible substrate.
12. A display device characterized by comprising the display panel according to any one of claims 1 to 11.
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| CN201810818487.2A CN108962031B (en) | 2018-07-24 | 2018-07-24 | Display panel and display device |
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| CN201810818487.2A CN108962031B (en) | 2018-07-24 | 2018-07-24 | Display panel and display device |
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| CN111584714A (en) * | 2020-05-27 | 2020-08-25 | 京东方科技集团股份有限公司 | OLED display structure preparation method and OLED display structure |
| CN111489654B (en) * | 2020-05-28 | 2022-07-19 | 京东方科技集团股份有限公司 | Support film and forming method thereof, display panel and manufacturing method thereof |
| CN114842747B (en) * | 2022-04-11 | 2024-04-26 | 昆山国显光电有限公司 | Flexible cover plate, flexible display screen and electronic equipment |
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