CN107301821B - Foldable display screen and display device - Google Patents
Foldable display screen and display device Download PDFInfo
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- CN107301821B CN107301821B CN201710644408.6A CN201710644408A CN107301821B CN 107301821 B CN107301821 B CN 107301821B CN 201710644408 A CN201710644408 A CN 201710644408A CN 107301821 B CN107301821 B CN 107301821B
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- 238000005452 bending Methods 0.000 claims abstract description 41
- 239000013013 elastic material Substances 0.000 claims description 7
- 239000012780 transparent material Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 6
- 230000001681 protective effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The application relates to a foldable display screen and a display device. The foldable display screen has a folded state and an unfolded state, and includes: a first portion; a second portion, in a folded state, the first portion being opposite the second portion; a flexible portion, the first portion being joined to the second portion via the flexible portion, the foldable display being folded at the flexible portion, the flexible portion having a first surface and a second surface disposed opposite to each other in a thickness direction of the foldable display; and the bending guide part comprises an elastic layer and an additional layer which are arranged in a stacked mode, the elastic layer is attached to the first surface, the additional layer is provided with a gap, the gap extends from the surface, far away from the elastic layer, of the additional layer to the elastic layer, and in the folded state, the surface, far away from the elastic layer, of the additional layer is opened at the gap. The scheme can guide the flexible part to bend towards the set direction, reduce the damage of the foldable display screen and prolong the service life of the foldable display screen.
Description
Technical Field
The application relates to the technical field of display, in particular to a foldable display screen and a display device.
Background
The foldable display screen can be unfolded when in use to realize large-area display, and can be folded when not in use to be convenient for storage and carrying. Currently, foldable display screens have been applied to various electronic devices, such as mobile phones, notebook computers, digital media players, and the like.
However, when the display screen is folded, the flexible portion of the display screen may be bent in the opposite direction due to an uncertain bending direction of the display screen. As shown in fig. 1 and 2, fig. 1 shows a schematic view of the inward concave bending of the flexible portion of the display screen, and fig. 2 shows a schematic view of the outward convex bending of the flexible portion of the display screen.
The bending direction of the flexible portion shown in fig. 1 is a desired bending direction, but the foldable display screen may also be in a situation as shown in fig. 2 during the folding process, and when the bending direction of the flexible portion of the foldable display screen is shown in fig. 2, the flexible portion is easy to form a dead fold with a folding line, which causes damage to the foldable display screen and greatly reduces the service life of the foldable display screen.
Disclosure of Invention
The application provides a collapsible display screen and display device, the flexible portion that can guide collapsible display screen is crooked to established direction, reduces the damage that causes collapsible display screen to the life-span of extension collapsible display screen.
A first aspect of the present application provides a foldable display screen having a folded state and an unfolded state, comprising:
a first portion;
a second portion, in the folded state, the first portion being opposite the second portion;
a flexible portion, the first portion being joined to the second portion via the flexible portion, the foldable display screen being folded at the flexible portion, the flexible portion having a first surface and a second surface oppositely disposed in a thickness direction of the foldable display screen; and
a curved guide portion including an elastic layer and an additional layer disposed in a stack, the elastic layer being attached to the first surface, the additional layer defining a gap extending from a surface of the additional layer away from the elastic layer toward the elastic layer,
in the folded state, the surface of the additional layer remote from the elastic layer opens at the slit.
According to one embodiment of the application, the curved guide section is made of a transparent material.
According to one embodiment of the application, the additional layer is made of an elastic material, the modulus of elasticity of the additional layer being greater than the modulus of elasticity of the elastic layer.
According to one embodiment of the application, the slit extends from a surface of the additional layer remote from the elastic layer in a linear direction towards a side close to the elastic layer.
According to an embodiment of the application, the slit extends through the additional layer.
According to an embodiment of the application, the number of the slits is plural, and the extending directions of the plural slits are parallel to each other.
According to one embodiment of the application, in the unfolded state, the elastic layer has a position of maximum thickness,
in a direction parallel to the plane of the foldable display screen and parallel to the direction in which the first portion points towards the second portion,
the thickness of the elastic layer is gradually reduced from the position with the maximum thickness to two sides respectively,
and the elastic layer has an attachment plane that is attached to the first surface.
According to one embodiment of the application, the elastic layer is of symmetrical construction and symmetrical with respect to a plane of symmetry through the location of maximum thickness, said plane of symmetry being perpendicular to the attachment plane.
According to one embodiment of the application, the surface of the elastic layer away from the flexible portion is an arc-shaped surface.
According to an embodiment of the application, a cross-section is formed by the curved guide portions taken through a straight line directed from the first portion to the second portion and perpendicular to any plane of the foldable display screen, in which cross-section a side line of the additional layer on a side facing away from the elastic layer is a straight line, or,
the side line of one side of the additional layer, which is far away from the elastic layer, is an arc line, and the arc line protrudes towards the direction far away from the elastic layer.
According to one embodiment of the application, the first portion, the second portion, and the flexible portion are a unitary structure.
A second aspect of the present application provides a display device comprising a foldable display screen, wherein the foldable display screen is any one of the foldable display screens described above.
The technical scheme provided by the application can achieve the following beneficial effects:
the application provides a foldable display screen, including crooked guide part, crooked guide part is including range upon range of elastic layer and the additional layer that sets up, and crooked guide part's elastic layer is attached to the first surface of flexible portion, and the gap has been seted up to the additional layer. After setting up like this, when exerting force to collapsible display screen and making it folding, because the gap has been seted up on the additional layer, the surface that the elastic layer was kept away from to the applied force makes the additional layer open in gap department, make this additional layer compare the elastic layer crooked more easily, and then realize that the collapsible display screen of guide is crooked towards established direction, reduce or even avoided collapsible display screen to appear the uncertain phenomenon of crooked direction, avoid collapsible display screen to form the dead book that has the folding line, reduce the damage that causes collapsible display screen, the degree of the fatigue destruction that collapsible display screen produced has been alleviateed, the life-span of collapsible display screen has been prolonged.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
FIG. 1 illustrates a prior art curved view of a flexible portion of a display screen that is concave inward;
FIG. 2 is a diagram illustrating a prior art outward convex curvature of a flexible portion of a display screen;
fig. 3a is a schematic view of a display device provided in an embodiment of the present application in an unfolded state;
FIG. 3b is a cross-sectional view of a display device according to an embodiment of the present disclosure in an expanded state;
fig. 4 is a schematic view of a display device provided in an embodiment of the present application in a folded state;
FIG. 5 is a schematic view of an embodiment of a curved guide portion disposed on a flexible portion according to an embodiment of the present application;
FIG. 6 is a cross-sectional view of a curved guide section attached to a foldable display screen provided by an embodiment of the present application;
FIG. 6a is a cross-sectional view of a curved guide section provided in accordance with an embodiment of the present application in an expanded state;
FIG. 7 is a cross-sectional view of a curved guide section provided in accordance with an embodiment of the present application in a folded state;
FIG. 8a is a schematic view of a curved guide portion provided in accordance with an embodiment of the present application attached to a flexible portion when a plurality of curved guide portions are provided;
FIG. 8b is a schematic view of the curved guide section provided in an embodiment of the present application attached to a flexible section when two are provided;
FIG. 8c is a schematic view of the curved guide portion extending in the Y-direction from one end of the flexible portion to the other end as provided by an embodiment of the present application;
FIG. 9a is a cross-sectional view of a curved guide portion according to an embodiment of the present application guiding a foldable display screen in a folded state;
fig. 9b is a schematic view of the foldable display screen provided in the embodiment of the present application, wherein the display surface is located outside the protective housing after being folded;
FIG. 10 is a cross-sectional view of a curved guide section provided in accordance with an embodiment of the present application, the elastic layer and the additional layer being formed of the same elastic material;
FIG. 11 is a schematic view of a curved guide portion according to an embodiment of the present application, wherein the side of the additional layer facing away from the resilient layer is curved;
FIG. 12 is a schematic view of a straight line drawn from the side of the additional layer facing away from the elastic layer in a curved guide portion according to an embodiment of the present application;
fig. 13 is a schematic view of a display device according to an embodiment of the present application.
Reference numerals:
1-a foldable display screen;
11-a first part;
12-a second part;
13-a flexible portion;
131-a first surface;
132-a second surface;
2-a protective housing;
3-bending the guide portion;
31-an elastic layer;
311-attachment plane;
312-edge line;
32-an additional layer;
321-a gap;
100-display device.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Detailed Description
The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.
It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it is also to be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through an intermediate element.
Referring to fig. 3a, fig. 3a is a schematic diagram illustrating an embodiment of a display device in an unfolded state.
The application provides a be applied to display device's collapsible display screen 1, collapsible display screen sets up in protecting sheathing 2 to avoid collapsible display screen 1 to receive the damage. This collapsible display screen 1 has fold condition and expansion state, and under expansion state, collapsible display screen 1 can show the image, and under fold condition, collapsible display screen 1 can fold in order to reduce occupation on the space, conveniently carries.
Specifically, referring to fig. 3b, fig. 3b shows a cross-sectional view of the display device in an unfolded state. The foldable display screen 1 comprises a first part 11, a second part 12 and a flexible part 13, wherein the flexible part 13 is connected with the first part 11 and the second part 12 respectively, and the three parts jointly form a display part of the foldable display screen 1.
In the prior art, the first portion 11 and the second portion 12 are both in contact with the protective housing 2, and during the folding of the foldable display screen 1, the first portion 11 and the second portion 12 move along with the protective housing 2 without deformation, and the folding of the foldable display screen 1 is mainly achieved by bending of the flexible portion 13, since the flexible portion 13 is not in contact with the protective housing 2, so that the bending direction of the flexible portion 13 is relatively free, and thus uncertainty of the bending direction is caused, for example, the flexible portion 13 may protrude to a side away from the protective housing 2, and further, the flexible portion 13 may protrude to a side close to the protective housing 2. For the former, because the internal space is limited after the foldable display screen 1 is folded, the flexible portion 13 can be folded under the action of the squeezing force, so that the foldable display screen 1 is damaged, and the display effect of the foldable display screen 1 is directly influenced.
The term "dead fold" as used herein means that when the display panel is bent, the bent portion of the display panel has an included angle and forms a relatively obvious folding line, and the surface where the bent portion is located is not a curved surface, but two planes with an included angle.
Referring to fig. 4, fig. 4 is a schematic view showing an embodiment of the display device in a folded state. The foldable display screen 1 is folded at the flexible portion 13, in which state the first portion 11 is opposite to the second portion 12. The first portion 11 and the second portion 12 may be a display screen with a rigid structure, or may be a flexible screen similar to the flexible portion 13, which is not limited in this application.
Referring to fig. 5, fig. 5 is a schematic view showing a curved guide portion provided in a flexible portion. In order to ensure that the foldable display screen 1 is bent in a given direction at the folded position, the foldable display screen 1 provided in the present application further includes a bending guide portion 3, and the bending guide portion 3 may guide the foldable display screen 1 to be bent only in one direction. For example, the foldable display 1 can be protruded only toward the-z direction in fig. 5 under the guidance of the curved guide portions 3, thereby alleviating a phenomenon that the foldable display 1 is folded dead, and extending the life span of the foldable display 1.
Wherein the-z-direction is defined as the direction perpendicular to the foldable display screen 1 in the unfolded state and directed by the flexible portion 13 towards the protective housing 2.
Referring to fig. 6, fig. 6 is a sectional view showing the curved guide portion attached to the foldable display screen. It is first defined herein that the flexible portion 13 has a first surface 131 and a second surface 132 which are oppositely disposed in the thickness direction of the foldable display screen 1, and it is easily understood that one of the first surface 131 and the second surface 132 is a display surface of the flexible portion 13, and the other is a non-display surface of the flexible portion 13, and no specific limitation is made on whether the first surface 131 is a display surface or a non-display surface.
Referring to fig. 6a, fig. 6a shows a cross-sectional view of the curved guide section in an expanded state.
The bending guide portion 3 includes an elastic layer 31 and an additional layer 32, which are stacked, and the elastic layer 31 and the additional layer 32 can be fixedly connected by adhesion or integrally formed by injection molding. The additional layer 32 has a slit 321, and the slit 321 extends from the surface of the additional layer 32 away from the elastic layer 31 to the elastic layer 31. It will be appreciated that the slit 321 is parallel to the dividing line between the flexible part 13 and the first part 11, or parallel to the dividing line between the flexible part 13 and the second part 12, in the direction of extension of the plane of the foldable display 1, when the foldable display 1 is in the unfolded state.
Referring to fig. 7, fig. 7 is a sectional view showing the curved guide portion in a folded state.
In order to achieve the guiding of the foldable display screen 1 to bend in a given direction, in conjunction with fig. 6, 6a and 7, the present application proposes that the bending guide portion 3 is attached to one side of the flexible portion 13, in particular, the elastic layer 31 of the bending guide portion 3 is attached to the first surface 131. After the arrangement, when a force is applied to the foldable display screen 1 to fold the foldable display screen 1, the additional layer 32 is opened at the slit 321 due to the slit 321 formed in the additional layer 32, and the folding force causes the surface of the additional layer 32 away from the elastic layer 31 to be opened at the slit 321, so that the additional layer 32 is more easily bent than the elastic layer 31, and the two ends of the additional layer 32 are tilted towards the side where the elastic layer 31 of the bending guide part 3 is located, thereby guiding the foldable display screen 1 to bend towards a predetermined direction; on the other hand, the elastic layer 31 is attached to the first surface 131, and when the foldable display screen 1 is folded, the elastic layer 31 is under tensile stress, and due to the elasticity of the elastic layer 31 itself, the flexible portion 13 can have a certain curvature, and even if the first surface is a curved surface, the flexible portion 13 can be prevented from being bent excessively and from being folded. For the technical scheme that the additional layer is used as the bending guide portion, the additional layer is used for guiding the flexible portion of the foldable display screen to bend towards the set direction, and due to the fact that the gap is formed in the additional layer, the additional layer is opened at the gap after being stressed, the flexible portion is prone to bending towards the set direction, however, due to the fact that the gap is formed in the additional layer, the flexible portion is prone to being bent excessively to cause dead folding. With the technical solution of attaching the elastic layer on the flexible portion of the foldable display screen alone, the elastic layer does not have an effect of guiding the flexible portion to bend in a certain direction, and conversely, when the flexible portion bends, the flexible portion is hindered from further bending due to the elasticity of the elastic layer. Compared with the technical scheme, in the application, after the elastic layer 31 and the additional layer 32 are arranged in a stacked manner, the effects of guiding the flexible portion 13 to bend towards the preset direction and preventing the flexible portion 13 from being folded and broken can be simultaneously achieved, the risk of folding and damaging the foldable display screen 1 is further reduced, and compared with the situation that the two functions are respectively achieved through two components, the foldable display screen is simpler in structure and better in manufacturability.
In one embodiment, referring to fig. 8a, a plurality of curved guiding portions 3 may be provided, and the plurality of curved guiding portions 3 may be arranged along the Y direction in fig. 5, and a space is left between two adjacent curved guiding portions 3, where the Y direction is: a direction perpendicular to the direction in which the first portion 11 points toward the second portion 12 on the plane of the foldable display screen 1 in the unfolded state; in another embodiment, referring to fig. 8b, only two curved guide portions 3 may be provided, and two curved guide portions 3 may be respectively provided at two ends of the flexible portion 13 along the Y direction; of course, in other embodiments, referring to fig. 8c, the curved guiding portion 3 may also be a one-piece structure extending from one end of the flexible portion 13 to the other end along the Y direction.
Referring to fig. 9a, fig. 9a is a sectional view showing the foldable display screen in a folded state guided by the curved guide portions. As can be seen from fig. 9a, the bending direction of the flexible portion 13 coincides with the bending direction of the curved guide portion 3.
In an embodiment, referring to fig. 9b, the first surface 131 is a portion of the display surface of the foldable display 1, and the second surface 132 is a portion of the non-display surface of the foldable display 1, in which case the elastic layer 31 is attached to the first surface 131, the flexible portion 13 protrudes in a direction opposite to the direction-z under the guidance of the curved guide portion 3, and after being folded, the relative positions of the first portion 11 and the second portion 12 are back-to-back, that is, when the foldable display 1 is folded, the display surface is exposed; in another embodiment, referring to fig. 4, the first surface 131 is a portion of the non-display surface of the foldable display 1, and the second surface 132 is a portion of the display surface of the foldable display 1, in which case the elastic layer 31 is attached to the first surface 131, the flexible portion 13 is protruded in the-z direction under the guidance of the curved guide portion 3, and after folding, the relative positions of the first portion 11 and the second portion 12 are opposite to each other, and after folding the foldable display 1, the display surface is inside the protective housing 2.
According to the above description, when the first surface 131 is a part of the display surface, if the curved guide portion 3 is attached to the first surface 131, a part of the image presented on the display surface is blocked. For this reason, it may be considered to provide the curved guide portion 3 as a transparent member, that is, the curved guide portion 3 is made of a transparent material, thereby making the curved guide portion 3 have a function of guiding the foldable display screen 1 to be curved in a given direction while reducing the influence of the curved guide portion 3 on the display effect.
Of course, the curved guide portion 3 attached to the non-display surface may be made of a transparent material, and the use of the curved guide portion 3 made of a transparent material is not limited to the case of only the display surface.
In the embodiment shown in fig. 6a and 7, the additional layer 32 may be made of a rigid material, such as a metal material or a glass material. If the additional layer 32 is a rigid layer, the slit 321 needs to be opened from the surface of the additional layer 32 away from the elastic layer 31 to the elastic layer 31, that is, the additional layer 32 needs to be broken by the slit 321 to divide the additional layer 32 into at least two parts, so as to ensure that the parts of the additional layer 32 separated by the slit 321 can be opened and closed at the slit, and ensure that the bending guide part 3 can guide the bending of the foldable display screen 1, and at the same time, the rigid layer is difficult to be compressed and deformed, so that the bending guide part 3 cannot be bent towards the side of the additional layer 32.
Alternatively, the additional layer 32 may be made of an elastic material, and in order to further ensure that the bending guide portion 3 has a certain bending direction when guiding the foldable display screen 1 to bend, the elastic modulus of the additional layer 32 may be set to be larger than that of the elastic layer 31, and the additional layer 32 having a larger elastic modulus may deform less under the same force than the elastic layer 31 having a smaller elastic modulus. By this mechanism, the additional layer 32 is less likely to be compressed than the elastic layer 31, and the additional layer 32 and the elastic layer 31 work together to prevent the bending guide portion 3 from being deformed in the direction opposite to the bending direction in fig. 7, thereby further ensuring that the foldable display panel 1 is bent in a predetermined direction and further prolonging the service life of the foldable display panel 1.
With continued reference to fig. 6a and 7, the slit 321 opened in the additional layer 32 is a straight slit, that is, the slit 321 extends from the surface of the additional layer 32 away from the elastic layer 31 to the side close to the elastic layer 31 along a straight line, and the slit 321 extending along the straight line can further facilitate the opening of the additional layer 32 under the folding force. Alternatively, the slit 321 may extend from the surface of the additional layer 32 remote from the elastic layer 31 toward the side close to the elastic layer 31 in a curved direction, and the curved shape may be a circular arc shape, an S-shape, or the like.
The number of the slits 321 may be one or more. In general, in order to avoid the dead fold phenomenon generated at the folding position of the foldable display panel 1, it is generally preferable to provide a plurality of slits 321 on the additional layer 32, so that the additional layer 32 can be opened at each slit 321 under the folding force, so that the force applied to the bending guide portion 3 can be relatively uniformly distributed at each position of the elastic layer 31 corresponding to the slit 321, thereby reducing the stress concentration phenomenon of the folding force. The number of the slits 321 can be set according to actual requirements.
As for the straight line type slits 321, when the plurality of slits 321 are provided, the extending directions of the plurality of slits 321 are parallel to each other, specifically, the extending directions of the plurality of slits 321 in the plane of the foldable display screen 1 are parallel to each other, and the plurality of slits 321 are parallel to each other in the direction extending parallel to the thickness direction of the foldable display screen 1. It should be noted that the foldable display screen 1 mentioned above is in the unfolded state.
Furthermore, for an additional layer 32 made of an elastic material, the slits 321 may extend only a predetermined distance without penetrating the additional layer 32, in one embodiment. In another embodiment, the slit 321 extends through the additional layer 32, i.e. the slit 321 extends from the additional layer 32 to the elastic layer 31. in this case, the additional layer 32 has a plurality of mutually independent portions, which make the deformation of the additional layer 32 after being subjected to a force more flexible. Compared with the two embodiments, the latter has larger deformation amount compared with the former, and the foldable display screen 1 is more flexible to bend.
Referring to fig. 10, fig. 10 shows a cross-sectional view of the elastic layer integrally formed with the additional layer.
The additional layer 32 made of an elastic material may be made of the same elastic material as the elastic layer 31, and the two layers are integrally formed, and the slit 321 is opened on the additional layer 32 and does not penetrate through the elastic layer 31, so that the flexible portion 13 can be guided to bend in a predetermined direction and the flexible portion 13 can be prevented from being folded.
Furthermore, in the embodiment shown in fig. 6a and 7, in the unfolded state of the foldable display 1, the elastic layer 31 has a position D with the largest thickness, and the thickness of the elastic layer 31 is gradually reduced from the position D with the largest thickness to both sides in a direction (X direction in fig. 6 a) parallel to the plane of the foldable display 1 and parallel to the direction from the first portion 11 to the second portion 12. In other words, the position D where the thickness is the largest is located at the middle position of the elastic layer 31, and the thickness of the elastic layer 31 is gradually reduced at both sides of the middle position. For the bending deformation, the bending stress is usually the largest at the middle position, and it can be said that the bending deformation at the middle position is larger than the bending deformation at the edge region, and the over-bending condition is easy to occur, therefore, the position D with the largest thickness is arranged at the middle position of the elastic layer 31, and the stress condition of the elastic layer 31 can be improved, so that the stress condition of the flexible part 13 corresponding to the position D with the largest thickness is improved, and the flexible part is prevented from being over-bent, and meanwhile, in the direction extending from the middle position to the two sides, the thickness of the elastic layer is gradually reduced, so that the flexible part corresponding to the elastic layer forms a smooth curved surface when being bent. In order to facilitate the bending of the foldable display 1, the position D with the largest thickness may be provided at the position where the bending stress of the flexible portion 13 is the largest, thereby preventing the flexible portion 13 from being folded.
Preferably, the elastic layer 31 has an attachment plane 311, when the elastic layer 31 is attached to the first surface 131, the attachment plane 311 is a plane for facilitating attachment to the first surface 131, and the bonding strength between the elastic layer 31 and the first surface 131 can be improved to prevent detachment.
Further, as shown in fig. 6a, it is also possible to provide the elastic layer 31 in a symmetrical structure, the elastic layer 31 being symmetrical with respect to a plane of symmetry at the position D where the through-thickness is the largest, the plane of symmetry being perpendicular to the attachment plane 311. In this way, the elastic layer 31 has the same deformation amount with the same trend of change on both sides at the position D where the thickness is the largest, so that the foldable display panel 1 has the same bending stress with the same trend of change as the corresponding parts on both sides, that is, the foldable display panel 1 and the corresponding parts on both sides receive the bending stress which is also symmetrical to each other, thereby enabling the flexible part of the foldable display panel 1 to form a symmetrical bending shape. .
It can be easily understood that the elastic layer 31 can be configured in various different structures, in one embodiment, the surface of the elastic layer 31 away from the flexible portion 13 can be an arc-shaped surface, and for the elastic layer 31 with the arc-shaped surface, under the action of the folding force, the stress on the whole arc-shaped surface is relatively uniform, that is, the whole arc-shaped surface can bear the stretching force together. Of course, the surface of the elastic layer 31 remote from the flexible portion 131 may also be arranged to be planar.
Further, a straight line passing through the first portion 11 in the unfolded state and directed to the second portion 12, and a curved guide portion 3 taken perpendicularly to any plane of the foldable display screen 1 forms a cross section in which a side line 312 of the additional layer 32 on a side away from the elastic layer 31 is a curved line, and the curved line is convex in a direction away from the elastic layer 31. Referring to FIG. 11, FIG. 11 shows a side of the additional layer away from the elastic layer with a curved edge. The intermediate portion of the additional layer 32 having the curved edge lines 312 is thicker, making it more incompressible.
Alternatively, the curved guide portion 3, taken through a straight line directed from the first portion 11 to the second portion 12 in the unfolded state and perpendicular to the plane of the foldable display 1, forms a cross-section in which the edge 312 of the side of the additional layer 32 facing away from the elastic layer 31 may also be a straight line. Referring to fig. 12, fig. 12 is a schematic diagram showing a straight line of the side of the additional layer away from the elastic layer. With this design, the curved guide portions 3 can be used to support the flexible portion 13 when the foldable display screen 1 is in the unfolded state, so that the flexible portion 13 remains flat.
In this application, the first portion 11, the second portion 12 and the flexible portion 13 of the foldable display screen 1 may be an integral structure, that is, the first portion 11 and the second portion 12 may both adopt the same structure as the flexible portion, and the three may be integrally formed.
As shown in fig. 13, based on the foldable display screen 1 in the foregoing, the present application also provides a display device 100, and the display device 100 includes the foldable display screen 1 in any of the above embodiments.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. A foldable display screen having a folded state and an unfolded state, comprising:
a first portion;
a second portion, in the folded state, the first portion being opposite the second portion;
a flexible portion, the first portion being joined to the second portion via the flexible portion, the foldable display screen being folded at the flexible portion, the flexible portion having a first surface and a second surface oppositely disposed in a thickness direction of the foldable display screen; and
the bending guide part comprises an elastic layer and an additional layer which are arranged in a stacked mode, and the elastic layer and the additional layer are fixedly connected in an adhesion mode; the elastic layer is attached to the first surface, the additional layer defines a slit extending through the additional layer, the slit extending from a surface of the additional layer distal from the elastic layer toward the elastic layer,
the additional layer is made of an elastic material, and the elastic modulus of the additional layer is larger than that of the elastic layer; the elastic layer has an attachment plane attached to the first surface;
in the folded state, the surface of the additional layer remote from the elastic layer opens at the slit;
in the unfolded state, two surfaces of the additional layer on both sides of the slit are in contact with each other in a direction parallel to the direction in which the first portion points towards the second portion;
and, in the deployed state, the elastic layer has a position of maximum thickness;
in a direction parallel to the plane of the foldable display screen and parallel to the direction in which the first portion points to the second portion, the thickness of the elastic layer gradually decreases from the position where the thickness is the largest to both sides.
2. The foldable display of claim 1, wherein the curved guide portion is made of a transparent material.
3. A foldable display according to claim 1 wherein the slits extend in a linear direction from a surface of the additional layer remote from the elastic layer towards a side adjacent the elastic layer.
4. The foldable display screen of claim 3, wherein the number of the slits is plural, and the extending directions of the plural slits are parallel to each other.
5. The foldable display of claim 1, wherein the elastic layer is of a symmetrical construction and is symmetrical about a plane of symmetry through the location of maximum thickness, the plane of symmetry being perpendicular to the attachment plane.
6. The foldable display screen of claim 1, wherein a surface of the elastic layer away from the flexible portion is an arc-shaped surface.
7. The foldable display of claim 6, wherein a cross-section is formed by the curved guide portion through a straight line directed from the first portion to the second portion and taken perpendicular to any plane of the foldable display, in which cross-section a side line of the additional layer on a side away from the elastic layer is a straight line, or,
the side line of one side of the additional layer, which is far away from the elastic layer, is an arc line, and the arc line protrudes towards the direction far away from the elastic layer.
8. A foldable display screen according to any one of claims 1 to 7, characterised in that the first, second and flexible portions are of unitary construction.
9. A display device comprising a foldable display, characterized in that the foldable display is a foldable display as claimed in any one of claims 1-8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710644408.6A CN107301821B (en) | 2017-07-31 | 2017-07-31 | Foldable display screen and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710644408.6A CN107301821B (en) | 2017-07-31 | 2017-07-31 | Foldable display screen and display device |
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| CN107301821A CN107301821A (en) | 2017-10-27 |
| CN107301821B true CN107301821B (en) | 2020-04-17 |
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| CN201710644408.6A Active CN107301821B (en) | 2017-07-31 | 2017-07-31 | Foldable display screen and display device |
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Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116798316A (en) | 2017-11-30 | 2023-09-22 | 株式会社半导体能源研究所 | Display panel, display device, input/output device, and data processing device |
| CN109859622B (en) * | 2017-11-30 | 2020-12-11 | 云谷（固安）科技有限公司 | Flexible substrate and flexible display screen |
| WO2019237337A1 (en) * | 2018-06-15 | 2019-12-19 | 深圳市柔宇科技有限公司 | Electronic apparatus and flexible screen supporting mechanism thereof |
| CN108683763A (en) * | 2018-07-04 | 2018-10-19 | Oppo广东移动通信有限公司 | Electronic device |
| CN109036131A (en) * | 2018-07-19 | 2018-12-18 | 武汉华星光电半导体显示技术有限公司 | Flexible display apparatus |
| WO2020029322A1 (en) * | 2018-08-09 | 2020-02-13 | 深圳市柔宇科技有限公司 | Foldable display device |
| CN109669513B (en) * | 2018-11-06 | 2022-05-17 | Oppo广东移动通信有限公司 | Electronic device |
| CN109658827B (en) * | 2018-11-06 | 2021-06-15 | Oppo广东移动通信有限公司 | Electronic device |
| KR20190020303A (en) * | 2019-02-10 | 2019-02-28 | 심성구 | Foldable Devices for Display |
| CN111696433B (en) * | 2019-03-11 | 2024-07-16 | 深圳市长盈精密技术股份有限公司 | Folding assembly and folding display device |
| CN111696436A (en) * | 2019-03-13 | 2020-09-22 | 深圳市长盈精密技术股份有限公司 | Flexible board and folding display device |
| CN109949702B (en) * | 2019-03-25 | 2024-01-02 | 京东方科技集团股份有限公司 | Flexible display device and manufacturing method thereof |
| CN110047382B (en) * | 2019-04-23 | 2021-06-29 | Oppo广东移动通信有限公司 | Flexible display screen and terminal equipment |
| WO2020237518A1 (en) * | 2019-05-29 | 2020-12-03 | 深圳市柔宇科技有限公司 | Display device and preparation method therefor, and electronic apparatus |
| CN110364085B (en) * | 2019-08-29 | 2021-07-23 | 武汉天马微电子有限公司 | Foldable display device |
| CN111667768B (en) * | 2020-06-30 | 2021-11-16 | 联想(北京)有限公司 | Display device and manufacturing method thereof |
| CN112652248B (en) * | 2021-01-06 | 2022-07-12 | 武汉华星光电半导体显示技术有限公司 | Folding display panel and folding display device |
| CN112767843B (en) * | 2021-02-07 | 2022-10-28 | 武汉天马微电子有限公司 | Flexible display module and display device |
| CN113503312B (en) * | 2021-07-13 | 2024-06-11 | 北京京东方显示技术有限公司 | Flexible hinge, display device and electronic equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104347000A (en) * | 2013-08-07 | 2015-02-11 | 三星显示有限公司 | Window panel for a display apparatus |
| CN106023810A (en) * | 2015-03-31 | 2016-10-12 | 三星显示有限公司 | Flexible display |
| CN106486018A (en) * | 2015-08-31 | 2017-03-08 | 乐金显示有限公司 | Foldable display device |
| CN106652802A (en) * | 2017-02-27 | 2017-05-10 | 上海天马微电子有限公司 | Foldable display device |
| CN106847099A (en) * | 2017-04-24 | 2017-06-13 | 京东方科技集团股份有限公司 | Foldable display device |
-
2017
- 2017-07-31 CN CN201710644408.6A patent/CN107301821B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104347000A (en) * | 2013-08-07 | 2015-02-11 | 三星显示有限公司 | Window panel for a display apparatus |
| CN106023810A (en) * | 2015-03-31 | 2016-10-12 | 三星显示有限公司 | Flexible display |
| CN106486018A (en) * | 2015-08-31 | 2017-03-08 | 乐金显示有限公司 | Foldable display device |
| CN106652802A (en) * | 2017-02-27 | 2017-05-10 | 上海天马微电子有限公司 | Foldable display device |
| CN106847099A (en) * | 2017-04-24 | 2017-06-13 | 京东方科技集团股份有限公司 | Foldable display device |
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| Publication number | Publication date |
|---|---|
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