CN111986575A - Display panel and display device - Google Patents
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- CN111986575A CN111986575A CN202010901355.3A CN202010901355A CN111986575A CN 111986575 A CN111986575 A CN 111986575A CN 202010901355 A CN202010901355 A CN 202010901355A CN 111986575 A CN111986575 A CN 111986575A
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- 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 embodiment of the invention discloses a display panel and a display device, wherein the display panel is divided into at least two non-folding areas and a folding area between the adjacent non-folding areas; the display panel includes: the display device comprises a substrate, a display function layer and a supporting layer, wherein the display function layer and the supporting layer are arranged on two opposite sides of the substrate and fixedly connected with the substrate; the support layer comprises at least one elastic material layer and at least one rigid material layer, the elastic material layer and the rigid material layer are fixedly connected, and in the folding area, the rigid material layer comprises openings. Because the display panel is provided with the supporting layer, the supporting layer can provide certain support for the substrate and the display function layer of the display panel, the problem of insufficient supporting force of the folding area of the display panel is solved, and the appearance flatness of the display panel can be improved.
Description
Technical Field
The embodiment of 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, foldable display screens have become a great trend.
The folding area of the existing foldable display device generally includes a rotation shaft, and a rotation shaft generating device is provided when the display device is folded.
However, the conventional display panel has the problems of uneven folding area and lack of support.
Disclosure of Invention
The invention provides a display panel and a display device, which aim to improve the flatness of a folding area of a foldable display device and provide support for the display panel in the folding area.
In a first aspect, an embodiment of the present invention provides a display panel, which is divided into at least two non-folding regions and a folding region between adjacent non-folding regions; the display panel includes: the display device comprises a substrate, a display function layer and a supporting layer, wherein the display function layer and the supporting layer are arranged on two opposite sides of the substrate and fixedly connected with the substrate;
the display function layer comprises a plurality of pixels and is used for displaying pictures;
the support layer comprises at least one elastic material layer and at least one rigid material layer, the elastic material layer and the rigid material layer are fixedly connected, and in the folding area, the rigid material layer comprises openings.
Optionally, the thickness of the rigid material layer is less than the thickness of the elastomeric material layer.
Optionally, the support layer includes at least one elastic material layer and at least two rigid material layers, and the elastic material layer and each rigid material layer are stacked.
Optionally, the support layer includes a first rigid material layer, an elastic material layer, and a second rigid material layer stacked from the first side of the substrate to a direction away from the display functional layer.
Optionally, the first rigid material layer, the elastic material layer and the second rigid material layer are of an integrated structure;
preferably, the first rigid material layer, the elastic material layer and the second rigid material layer form an integral structure by adopting a common-mode molding process.
Optionally, the thickness of the first rigid material layer is smaller than the thickness of the second rigid material layer.
Optionally, when the display panel is in a flattened state, the bendable direction of the display panel is a direction departing from the light emitting surface of the display panel;
the supporting layer comprises a third rigid material layer and a fourth rigid material layer, and the distance between the third rigid material layer and the substrate is smaller than the distance between the fourth rigid material layer and the substrate along the thickness direction of the display panel;
the size of the openings of the third rigid material layer is larger than the size of the openings of the fourth rigid material layer.
Optionally, when the display panel is in a flattened state, the bendable direction of the display panel is a direction facing the light emitting surface of the display panel;
the supporting layer comprises a third rigid material layer and a fourth rigid material layer, and the distance between the third rigid material layer and the substrate is smaller than the distance between the fourth rigid material layer and the substrate along the thickness direction of the display panel;
the size of the openings of the third rigid material layer is smaller than the size of the openings of the fourth rigid material layer.
Optionally, the rigid material layer is made of metal, and the elastic material layer is made of silicone or thermoplastic polyurethane elastomer.
In a second aspect, an embodiment of the present invention further provides a display device, including the display panel provided in the first aspect; the display device also comprises structural members which correspond to the non-folding areas one by one, wherein in the thickness direction of the display device, the structural members are superposed with the corresponding non-folding areas, and the structural members are arranged on one side of the supporting layer away from the substrate; the display device further comprises a connecting piece arranged in the folding area, and the connecting piece is connected with the structural pieces on the two sides.
The embodiment provides a display panel and a display device, wherein the display panel is divided into at least two non-folding areas and a folding area between the adjacent non-folding areas; the display panel includes: the display device comprises a substrate, a display function layer and a supporting layer, wherein the display function layer and the supporting layer are arranged on two opposite sides of the substrate and fixedly connected with the substrate; the support layer comprises at least one elastic material layer and at least one rigid material layer, the elastic material layer and the rigid material layer are fixedly connected, and in the folding area, the rigid material layer comprises openings. Because the display panel is provided with the supporting layer, even if the display device comprising the display panel is folded, the connecting pieces such as the hinge can only contact with the supporting layer, and the supporting layer can provide certain support for the substrate and the display function layer of the display panel, so that the problem of insufficient supporting force in a folding area in the prior art is solved; and, because the supporting layer includes the rigidity material layer, the rigidity material layer can provide powerful support, further improves the not enough problem of display panel folding zone holding power. Moreover, the support layer comprises the elastic material layer which has certain elasticity, so that the substrate and the display function layer of the display panel can not deform greatly, and the appearance flatness of the display panel can be improved; and because the supporting layer includes the rigidity material layer, the difficult deformation that takes place of rigidity material layer further makes basement and the display function layer in the display panel more level and more smooth, further improves display panel's outward appearance roughness.
Drawings
Fig. 1 is a schematic structural diagram of a display panel in a flattened state according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display panel in a folded state according to an embodiment of the present invention;
FIG. 3 is a top view of a rigid material layer in a display panel according to an embodiment of the invention;
FIG. 4 is a schematic structural diagram of another display panel provided in an embodiment of the present invention in a flattened state;
FIG. 5 is a schematic structural diagram of another display panel provided in an embodiment of the present invention in a flattened state;
FIG. 6 is a schematic diagram of a stretched film structure of a support layer according to an embodiment of the present invention;
FIG. 7 is a schematic view of a stretched film layer of another support layer provided by an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another display panel provided in a folded state according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As described in the background art, the conventional display panel has problems of unevenness of a folding region and lack of support. The inventor finds that the above problems occur because the conventional foldable display device generally includes a screen body, a structural member for supporting the screen body, and a connecting member such as a hinge, and when the screen body, the structural member and the connecting member are integrated into the display device, the structural member is generally disposed in a non-folding region, the connecting member such as a hinge is generally disposed in a folding region, and the connecting member can connect the structural members in the non-folding regions on both sides. And the structure passes through modes fixed connection such as glue film laminating with the screen body usually to in order to guarantee that display device can take place to buckle, in folding district, connecting piece such as hinge and screen body can not direct contact, but have certain clearance, make at folding district not enough to the holding power of the screen body. Moreover, since no structural member is arranged in the folding area, when the display device is folded, the connecting member may push against the screen body, so that the flatness of the screen body is poor.
For the above reasons, an embodiment of the present invention provides a display panel, fig. 1 is a schematic structural diagram of a display panel provided by an embodiment of the present invention in a flattened state, fig. 2 is a schematic structural diagram of a display panel provided by an embodiment of the present invention in a folded state, fig. 3 is a top view of a rigid material layer in a display panel provided by an embodiment of the present invention, and referring to fig. 1 to fig. 3, the display panel is divided into at least two non-folding areas NFA and a folding area FA between adjacent non-folding areas NFA; the display panel includes: the display device comprises a substrate 110, a display function layer 120 and a support layer 130, wherein the display function layer 120 and the support layer 130 are arranged on two opposite sides of the substrate 110, and the support layer 130 is fixedly connected with the substrate 110;
the display function layer 120 includes a plurality of pixels for displaying images;
the support layer 130 includes at least one elastic material layer 131 and at least one rigid material layer 132, the elastic material layer 131 and the rigid material layer 132 are fixedly connected, and the rigid material layer 132 includes openings 1320 at the folding area FA.
In which fig. 1 and 2 may correspond to different states of the same display panel, namely to a flattened state and a folded state, respectively, fig. 1 and 2 exemplarily show a case where the display panel includes two non-folded regions NFA and one folded region FA.
In particular, the substrate 110 may provide cushioning, protection, or support for the display device. The display panel of this embodiment is a foldable display panel, wherein the folding area FA of the display panel can be bent, so the substrate 110 can be selected as a flexible substrate, and the material of the flexible substrate can be Polyimide (PI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), or the like, or can be a mixture of the above materials.
A display function layer 120 is disposed on one side of the substrate 110, and the display function layer 120 may be an Organic Light Emitting Diode (OLED) display function layer, a liquid crystal display function layer, a quantum dot light emitting diode (QLED) display function layer, a micro light emitting diode (micro led) display function layer, and the like, which is not limited herein. Taking the display function layer 120 as an OLED display function layer for illustration, the display function layer 120 may include a driving backplane and an OLED structure layer, the driving backplane is disposed on the substrate 110, the OLED structure layer is disposed on a side of the driving backplane away from the substrate 110, the driving backplane may include a thin film transistor array, and the thin film transistor array controls a current flowing into each OLED pixel; the OLED structure layer may include a first electrode, a hole injection layer, a hole transport layer, a light emitting material layer, an electron transport layer, an electron injection layer, and a second electrode disposed from bottom to top, wherein the first electrode may be an anode, and the second electrode may be a cathode.
A support layer 130 is disposed on the other side of the substrate 110, i.e., the support layer 130 and the display functional layer 120 are disposed on the opposite side of the substrate 110. The support layer 130 is fixedly connected with the substrate 110, wherein the connection manner may be a manner of attaching through an adhesive layer, but the fixed connection manner is not limited thereto. Wherein the support layer 130 comprises at least one layer of elastic material 131 and at least one layer of rigid material 132, fig. 1 and 2 exemplarily show the case where the display panel comprises one layer of elastic material 131 and one layer of rigid material 132. Wherein, the relative positions of the elastic material layer 131 and the rigid material layer 132 are not limited in this embodiment. For example, for the supporting layer 130 including a layer of elastic material 131 and a layer of rigid material 132, the layer of elastic material 131 may be located between the substrate 110 and the layer of rigid material 132, or the layer of rigid material 132 may be located between the substrate 110 and the layer of elastic material 131. Because the display panel itself has the supporting layer 130, even when the display device including the display panel of this embodiment is folded, the connecting members such as the hinges do not directly contact with the substrate 110 in the display panel, but only contact with the supporting layer 130, and the supporting layer 130 can provide a certain support for the substrate 110 and the display function layer 120 of the display panel, thereby avoiding the problem of insufficient supporting force in the folding area FA in the prior art; moreover, because the rigid material layer 132 is included in the support layer 130, the rigid material layer 132 can provide strong support, further improving the problem of insufficient support force of the display panel folding area FA. Moreover, because the support layer 130 includes the elastic material layer 131, the elastic material layer 131 has certain elasticity, so that even if the connecting piece such as a hinge is pushed against the support layer 130 during folding, even if the surface of the elastic material layer 131 close to the connecting piece such as the hinge is greatly deformed, the deformation of the surface (the surface close to the display panel substrate 110) far away from the connecting piece such as the hinge is also smaller, so that the substrate 110 and the display functional layer 120 of the display panel are not greatly deformed, and further, the appearance flatness of the display panel can be improved; moreover, since the support layer 130 includes the rigid material layer 132, the rigid material layer 132 is not easily deformed, so that even if the connection members such as hinges are pushed against the support layer 130 when the display device is folded, the rigid material layer 132 is not greatly deformed, so that the substrate 110 and the display function layer 120 in the display panel are more flat, and the appearance flatness of the display panel is further improved.
Although the supporting force of the rigid material layer 132 is stronger and the effect of improving the flatness of the appearance is better, the thicker the rigid material layer 132 is, the larger the repulsive force is for the display panel to bend, and the risk of the delamination problem of the display panel increases. Therefore, in this embodiment, the supporting layer 130 includes an elastic material layer 131 and a rigid material layer 132, and the rigid material layer 132 is fixedly connected to the elastic material layer 131, wherein the connection manner may be a manner of attaching through an adhesive layer, but the fixed connection manner is not limited thereto. The elastic material layer 131 also has a certain supporting function and a certain buffering function, so that the thickness of the rigid material layer 132 does not need to be very thick, and the bending resilience of the display panel is not too large. In addition, in the display panel of the embodiment, in the folding area FA, the rigid material layer 132 includes the opening 1320, and the opening 1320 may play a role of stress relief, so as to reduce the bounce of the rigid material layer 132.
Alternatively, the material of the elastic material layer 131 may be silicone rubber or Thermoplastic polyurethane elastomer (TPU). Alternatively, the material of the rigid material layer 132 may be a metal, and may be, for example, aluminum or stainless steel. Optionally, the rigid material layer 132 is a metal sheet.
The display panel provided by the embodiment is divided into at least two non-folding areas and a folding area between the adjacent non-folding areas by arranging the display panel; the display panel includes: the display device comprises a substrate, a display function layer and a supporting layer, wherein the display function layer and the supporting layer are arranged on two opposite sides of the substrate and fixedly connected with the substrate; the support layer comprises at least one elastic material layer and at least one rigid material layer, the elastic material layer and the rigid material layer are fixedly connected, and in the folding area, the rigid material layer comprises openings. Because the display panel is provided with the supporting layer, even if the display device comprising the display panel is folded, the connecting pieces such as the hinge can only contact with the supporting layer, and the supporting layer can provide certain support for the substrate and the display function layer of the display panel, so that the problem of insufficient supporting force in a folding area in the prior art is solved; and, because the supporting layer includes the rigidity material layer, the rigidity material layer can provide powerful support, further improves the not enough problem of display panel folding zone holding power. Moreover, the support layer comprises the elastic material layer which has certain elasticity, so that the substrate and the display function layer of the display panel can not deform greatly, and the appearance flatness of the display panel can be improved; and because the supporting layer includes the rigidity material layer, the difficult deformation that takes place of rigidity material layer further makes basement and the display function layer in the display panel more level and more smooth, further improves display panel's outward appearance roughness.
With continued reference to fig. 1, optionally, the thickness h2 of the rigid material layer 132 is less than the thickness h1 of the elastomeric layer 131.
Specifically, as described in the above embodiments, the thicker the thickness of the rigid material layer 132, the greater the resilience for the display panel to bend, and the increased risk of the display panel delamination problem. Therefore, in this embodiment, the thickness of the rigid material layer 132 is smaller than the thickness of the elastic material layer 131, so that on the basis of ensuring the good supporting effect of the supporting layer 130, the resilience of the display panel after being bent is not too large, the display panel can be ensured to be in a stable bent state, and the risk of layering of the display panel is reduced.
On the basis of the above technical solution, the thickness range of the supporting layer 130 is 0.25-0.55 μm, so that the thickness of the display panel is not too thick after the supporting layer 130 is added, which is beneficial to realizing the lightness and thinness of the display panel. Illustratively, the thickness of the support layer 130 may be selected to be 0.25 μm, so that the display panel is thinner; the thickness of the support layer 130 may also be selected to be 0.55 μm, so as to ensure that the support layer 130 can provide stronger support for the substrate 110 and the display function layer 120 of the display panel; the thickness of the supporting layer 130 may also be selected to be 0.4 μm, so as to ensure that the display panel is light and thin on the basis of ensuring that the supporting layer 130 can provide stronger support for the substrate 110 and the display function layer 120 of the display panel.
Fig. 4 is a schematic structural diagram of another display panel provided in an embodiment of the invention in a flattened state, and referring to fig. 4, optionally, the support layer 130 includes at least one elastic material layer 131 and at least two rigid material layers 132, and the elastic material layer 131 and the rigid material layers 132 are stacked. Since the rigid material layer 132 can provide more reliable support for the substrate 110 and the display functional layer 120, and is more beneficial to improving the appearance flatness of the display panel, by providing the support layer 130 including at least two rigid material layers 132, it can be ensured that the substrate 110 and the display functional layer 120 can be more reliably supported in the folding area FA, and the appearance flatness of the display panel can be further improved.
For example, the elastic material layer 131 may be disposed between two rigid material layers 132, the elastic material layer 131 may be further disposed adjacent to the substrate 110, the two rigid material layers 132 are disposed on the sides of the elastic material layer 131 away from the substrate 110, the elastic material layer 131 may be further disposed on the outermost sides, and the two rigid material layers 132 are disposed between the elastic material layer 131 and the substrate 110. Wherein the supporting layer 130 comprises two elastic material layers 131 and two rigid material layers 132 as schematically shown in fig. 4, and the example is illustrated in which the elastic material layers 131 and the rigid material layers 132 are arranged at intervals.
Fig. 5 is a schematic structural diagram of another display panel provided in an embodiment of the present invention in a flattened state, and referring to fig. 5, the support layer 130 may optionally include a first rigid material layer 1321, an elastic material layer 131, and a second rigid material layer 1322 stacked from a side of the substrate 110 to a direction away from the display functional layer 120.
Specifically, the supporting layer 130 includes a sandwich structure formed by the first rigid material layer 1321, the elastic material layer 131, and the second rigid material layer 1322, so that on one hand, the number of the films included in the supporting layer 130 is small, and it can be ensured that the supporting layer 130 is easily thinner, and further the display panel is thinner. On the other hand, the elastic material layer 131 is disposed between the first rigid material layer 1321 and the second rigid material layer 1322, so that when the display device including the display panel of the present embodiment is bent, the first rigid material layer 1321 and the second rigid material layer 1322 can provide a dual supporting function, further ensuring that the substrate 110 and the display function layer 120 of the display panel can be strongly supported in the folding area FA. Moreover, when the display device is bent, even if the connecting members such as the hinge are in contact with the supporting layer 130, since the second rigid material layer 1322 is disposed at the outermost side, the rigid material is not easily deformed, and thus the second rigid material layer 1322 is not greatly deformed due to contact with the connecting members such as the hinge, and the first rigid material layer 1321 is not easily deformed due to buffering by the elastic material layer 131, thereby further ensuring the appearance flatness of the display panel.
And the rigid material layer 132 is generally easier to be combined with the substrate 110 or other structures than the elastic material layer 131, so that the elastic material layer 131 is disposed between the first rigid material layer 1321 and the second rigid material layer 1322, so that the support layer 130 is easier to be combined with the substrate 110, and the support layer 130 is easier to be combined with the structural members on both sides of the connection member, such as the hinge in the display panel of the embodiment. Alternatively, the first rigid material layer 1321 may be attached to the substrate 110 by an adhesive layer, and the second rigid material layer 1322 may be used to attach to the structural members on both sides of the connector of the display device by an adhesive layer.
And, current display panel does not usually include the supporting layer, folding structure such as display panel and connecting piece such as hinge, structure usually are made by different manufacturers, the display panel manufacturer generally is absorbed in display panel's display function, folding structure manufacturer then absorb in with folding structure's folding effect, and all can not consider the problem that folding zone holding power is not enough when integrating display panel and connecting piece such as hinge, structure etc. into display device, make after will integrate display panel and connecting piece such as hinge, structure etc. into display device, there will be the problem that the display panel holding power is not enough and the outward appearance roughness is relatively poor in folding zone FA usually. Compared with the conventional display panel, the display panel of the embodiment includes the supporting layer of the sandwich structure, so that when the display device including the display panel of the embodiment is formed in the later stage, the structural member is directly attached to the supporting layer, that is, the display panel of the embodiment includes the supporting layer, so that after the display panel is integrated with the hinge and other connecting members and structural members into the display device, the supporting layer can provide powerful support for the structures except the supporting layer in the display panel.
On the basis of the above embodiment, optionally, the first rigid material layer 1321, the elastic material layer 131 and the second rigid material layer 1322 are of an integral structure.
Specifically, when the display panel is manufactured, the display panel not including the supporting layer 130 can still be manufactured according to the conventional process. The support layer 130 may be additionally manufactured by manufacturing the first rigid material layer 1321, the elastic material layer 131, and the second rigid material layer 1322 into the support layer 130 of an integrated structure, and then attaching the support layer 130 to the substrate 110 of the display panel without the support layer 130.
Optionally, the first rigid material layer 1321, the elastic material layer 131 and the second rigid material layer 1322 are formed into an integral structure by using a co-molding process. Specifically, the support layer 130 may be formed as a unitary structure by using a mold injection molding process, for example, the first rigid material layer 1321 and the second rigid material layer 1322 may be respectively placed in a mold, the first rigid material layer 1321 and the second rigid material layer 1322 have a certain distance therebetween, and then an elastic material, such as silicone or TPU, is injected between the first rigid material layer 1321 and the second rigid material layer 1322, so that the first rigid material layer 1321, the elastic material layer 131, and the second rigid material layer 1322 form a unitary structure.
It should be noted that other methods may be used to form the supporting layer 130 with a sandwich structure, for example, by preventing the glue brushing, that is, brushing the glue on one side of the first rigid material layer 1321, and when the glue brushing thickness reaches the required thickness of the elastic material layer 131, disposing the second rigid material layer 1322 on the side of the brushed glue away from the first rigid material layer 1321 to form the supporting layer 130 with an integrated structure.
With continued reference to fig. 5, optionally, the thickness h3 of the first layer 1321 of rigid material is greater than the thickness h4 of the second layer 1322 of rigid material.
Specifically, the first rigid material layer 1321 is closer to the substrate 110 and the display functional layer 120 than the second rigid material layer 1322, so that the thicker the first rigid material layer 1321 is, the less influence of the contact of the connecting member such as the hinge to the support layer 130 on the flatness of the display panel is, and therefore, the thicker the first rigid material layer 1321 is, the better the flatness of the appearance of the display panel can be.
Fig. 6 is a schematic diagram of a stretched structure of a supporting layer, where the structure shown in fig. 6 may correspond to the stretched structure of the supporting layer 130 including the first rigid material layer 1321, the elastic material layer 131, and the second rigid material layer 1322 shown in fig. 5, and referring to fig. 5 and fig. 6, based on the above technical solutions, optionally, when the display panel is in a flattened state, the bendable direction of the display panel is a direction away from the light emitting surface of the display panel;
the support layer 130 includes a third rigid material layer 1323 and a fourth rigid material layer 1324, and the distance between the third rigid material layer 1323 and the substrate 110 is smaller than the distance between the fourth rigid material layer 1324 and the substrate 110 along the thickness direction of the display panel;
the openings 1320 of the third rigid material layer 1323 are larger in size than the openings 1320 of the fourth rigid material layer 1324.
The size of the openings 1320 in the third rigid material layer 1323 is larger than the size of the openings 1320 in the fourth rigid material layer 1324, which means that the size of the openings 1320 in the third rigid material layer 1323 is larger than the size of the openings 1320 in the fourth rigid material layer 1324 in any direction.
The light emitting surface of the display panel is a side of the display functional layer 120 away from the substrate 110. Specifically, in the flat state of the display panel, the bendable direction of the display panel is a direction away from the light exit surface of the display panel (generally described as outward bending), where the outward bending of the display panel can refer to fig. 2. The at least two layers 132 of rigid material are included in the support layer 130, and the at least two layers 132 of rigid material include a third layer 1323 of rigid material and a fourth layer 1324 of rigid material, wherein the third layer 1323 of rigid material is closer to the display panel than the fourth layer 1324 of rigid material, wherein for the display panel shown in fig. 5, the first layer 1321 of rigid material serves as the third layer 1323 of rigid material, and the second layer 1322 of rigid material serves as the fourth layer 1324 of rigid material. Because the third rigid material layer 1323 is closer to the substrate 110 than the fourth rigid material layer 1324, and when the display panel is folded outward, the third rigid material layer 1323 is located outside the fourth rigid material layer 1324, accordingly, the deformation of the third rigid material layer 1323 is greater than the deformation of the fourth rigid material layer 1324 in the folding region FA, so that the stress borne by the third rigid material layer 1323 is greater than the stress borne by the fourth material layer, and therefore, the size of the opening 1320 of the third rigid material layer 1323 is greater than the size of the opening 1320 of the fourth rigid material layer 1324, so that the stress of the third rigid material layer 1323 can be released more, thereby ensuring that the display panel can be reliably bent, and being beneficial to reducing the bounce force of the display panel in the folded state.
Fig. 7 is a schematic structural diagram of another support layer provided in an embodiment of the invention after being unfolded, fig. 8 is a schematic structural diagram of another display panel provided in an embodiment of the invention in a folded state, and the display panel shown in fig. 8 may correspond to the display panel shown in fig. 1 in a folded state, where the structure shown in fig. 7 may correspond to the schematic structural diagram of the support layer 130 shown in fig. 5 including the first rigid material layer 1321, the elastic material layer 131 and the second rigid material layer 1322 after being unfolded, referring to fig. 5 and fig. 7, optionally, when the display panel is in a flattened state, a bendable direction of the display panel is a direction facing a light emitting surface of the display panel;
the support layer 130 includes a third rigid material layer 1323 and a fourth rigid material layer 1324, and the distance between the third rigid material layer 1323 and the substrate 110 is smaller than the distance between the fourth rigid material layer 1324 and the substrate 110 along the thickness direction of the display panel;
the openings 1320 of the third rigid material layer 1323 are smaller in size than the openings 1320 of the fourth rigid material layer 1324.
Specifically, in the flat state of the display panel, the bendable direction of the display panel is a direction facing the light exit surface of the display panel (generally described as a folded direction), and the display panel shown in fig. 8 is a folded display panel. The at least two layers 132 of rigid material are included in the support layer 130, and the at least two layers 132 of rigid material include a third layer 1323 of rigid material and a fourth layer 1324 of rigid material, wherein the third layer 1323 of rigid material is closer to the display panel than the fourth layer 1324 of rigid material, wherein for the display panel shown in fig. 5, the first layer 1321 of rigid material serves as the third layer 1323 of rigid material, and the second layer 1322 of rigid material serves as the fourth layer 1324 of rigid material. Because the third rigid material layer 1323 is closer to the substrate 110 than the fourth rigid material layer 1324, and when the display panel is folded inward, the third rigid material layer 1323 is located inside the fourth rigid material layer 1324, accordingly, the deformation of the third rigid material layer 1323 in the folding region FA is smaller than the deformation of the fourth rigid material layer 1324, so that the stress borne by the third rigid material layer 1323 is smaller than the stress borne by the fourth material layer, and therefore, the size of the opening 1320 of the third rigid material layer 1323 is smaller than the size of the opening 1320 of the fourth rigid material layer 1324, so that the stress of the fourth rigid material layer 1324 can be released more, thereby ensuring that the display panel can be reliably bent, and being beneficial to reducing the bounce force of the display panel in the folded state.
The size of the openings 1320 in the third rigid material layer 1323 being smaller than the size of the openings 1320 in the fourth rigid material layer 1324 means that the size of the openings 1320 in the third rigid material layer 1323 is smaller than the size of the openings 1320 in the fourth rigid material layer 1324 in any direction.
Fig. 6 and 7 only illustrate the planar structure of the third rigid material layer 1323, the elastic material layer 131, and the fourth rigid material layer 1324, and do not show the thickness of each of the third rigid material layer 1323, the elastic material layer 131, and the fourth rigid material layer 1324.
On the basis of the above embodiments, optionally, of the rigid material layers included in the support layer, the rigid material layer with the largest opening size in the first direction is equal to the folding area in the first direction. The first direction is the direction of the central connecting line of two adjacent non-folding areas.
And, optionally, the size of the opening in the first direction is larger than the size of the opening in the second direction, and the second direction is perpendicular to the first direction. When the display panel is folded, stress is mainly concentrated in the first direction, so that the size of the opening in the first direction is larger, and the stress is more favorably released.
Fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present invention, and referring to fig. 9, the display device includes the display panel according to any of the embodiments of the present invention, and further includes structural members 210 corresponding to the non-folding regions NFA one to one, where the structural members 210 are overlapped with the corresponding non-folding regions NFA, and the structural members 210 are disposed on a side of the support layer 130 away from the substrate 110; the display device further includes a connecting member 220 disposed at the folding area FA, and the connecting member 220 is connected to the structural members 210 at both sides.
The connecting piece 220 can adopt a single-shaft rotating shaft structure, and has the advantages of simple structure, few parts, long service life and the like; or, a hinge type rotating shaft structure can be selected; alternatively, a hinge structure may be used; the connecting member may also be a connecting structure that can enable the display device to be folded in other existing folding display devices, and this embodiment is not specifically limited herein.
Alternatively, the structural member 210 may be a structure for supporting the display panel. Optionally, the display device further includes a appearance moving member 230, and the appearance moving member 230 is used for shielding the connecting member, so that the display device has an aesthetic appearance.
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 (10)
1. A display panel is characterized in that the display panel is divided into at least two non-folding areas and a folding area between the adjacent non-folding areas; the display panel includes: the display device comprises a substrate, a display function layer and a support layer, wherein the display function layer and the support layer are arranged on two opposite sides of the substrate, and the support layer is fixedly connected with the substrate;
the display function layer comprises a plurality of pixels and is used for displaying pictures;
the support layer comprises at least one elastic material layer and at least one rigid material layer, the elastic material layer and the rigid material layer are fixedly connected, and the rigid material layer comprises openings in the folding area.
2. The display panel of claim 1, wherein the rigid material layer has a thickness less than a thickness of the elastic material layer.
3. The display panel according to claim 1, wherein the support layer comprises at least one layer of elastic material and at least two layers of rigid material, the layer of elastic material and each of the layers of rigid material being stacked.
4. The display panel according to claim 3, wherein the support layer includes a first rigid material layer, an elastic material layer, and a second rigid material layer stacked in a direction away from the display function layer from the substrate side.
5. The display panel according to claim 4, wherein the first rigid material layer, the elastic material layer, and the second rigid material layer are a unitary structure;
preferably, the first rigid material layer, the elastic material layer and the second rigid material layer form an integral structure by adopting a common-mode molding process.
6. The display panel of claim 4 wherein the thickness of the first layer of rigid material is less than the thickness of the second layer of rigid material.
7. The display panel according to any one of claims 3 to 6, wherein in the flat state of the display panel, the bendable direction of the display panel is a direction away from the light emitting surface of the display panel;
the support layer comprises a third rigid material layer and a fourth rigid material layer, and the distance between the third rigid material layer and the substrate is smaller than the distance between the fourth rigid material layer and the substrate along the thickness direction of the display panel;
the size of the openings of the third rigid material layer is larger than the size of the openings of the fourth rigid material layer.
8. The display panel according to any one of claims 3 to 6, wherein in the flat state of the display panel, the bendable direction of the display panel is a direction facing a light exit surface of the display panel;
the support layer comprises a third rigid material layer and a fourth rigid material layer, and the distance between the third rigid material layer and the substrate is smaller than the distance between the fourth rigid material layer and the substrate along the thickness direction of the display panel;
the size of the opening of the third rigid material layer is smaller than the size of the opening far away from the fourth rigid material layer.
9. The display panel according to claim 1, wherein the rigid material layer is made of metal, and the elastic material layer is made of silicone or thermoplastic polyurethane elastomer.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9; the structure parts are in one-to-one correspondence with the non-folding areas, the structure parts are overlapped with the corresponding non-folding areas in the thickness direction of the display device, and the structure parts are arranged on one side, far away from the substrate, of the supporting layer; the display device further comprises a connecting piece arranged in the folding area, and the connecting piece is connected with the structural pieces on two sides.
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| CN202010901355.3A CN111986575A (en) | 2020-08-31 | 2020-08-31 | Display panel and display device |
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| CN202010901355.3A CN111986575A (en) | 2020-08-31 | 2020-08-31 | Display panel and display device |
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| CN113284417A (en) * | 2021-05-18 | 2021-08-20 | 武汉华星光电半导体显示技术有限公司 | Flexible display module |
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Application publication date: 20201124 |
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