CN114973969A - Folding display screen - Google Patents
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- CN114973969A CN114973969A CN202210742403.8A CN202210742403A CN114973969A CN 114973969 A CN114973969 A CN 114973969A CN 202210742403 A CN202210742403 A CN 202210742403A CN 114973969 A CN114973969 A CN 114973969A
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Classifications
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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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The application relates to the technical field of display panel, especially, relate to a folding display screen, folding display screen has the region of buckling, and folding display screen includes display screen body and membranous layer structure, and membranous layer structure lays on the display screen body, and membranous layer structure is provided with the trompil in the region of buckling. The utility model provides a folding display screen's membranous layer structure is provided with the trompil in the region of buckling to absorb the partial deformation in the membranous layer structure, reduce the deformation volume of trompil rete simultaneously, and then reduce the rete staggered volume at display screen edge, reduce the production of crease.
Description
Technical Field
The application relates to the technical field of display panels, in particular to a folding display screen.
Background
The foldable display screen is a flexible display screen which can be bent like paper and simultaneously keep the display performance, and is widely applied to flexible display devices such as foldable mobile phones and foldable tablet computers. The general folding display screen comprises a display screen body and film layer structures connected to the display screen body, wherein the film layer structures play a role in protecting the display screen body or endow the display screen body with some functional characteristics. However, after the existing folding display screen is bent for a long time, the film layers may be staggered, and a crease may be generated in the bending area, which may affect the visual experience of the folding display screen.
Disclosure of Invention
The application provides a folding display screen to solve current folding display screen and after experiencing long-time buckling, the rete staggers can appear in the region of buckling, produces the problem of crease.
According to a first aspect of the present application, the present application provides a foldable display screen, the foldable display screen has a bending region, the foldable display screen includes:
a display screen body;
the film layer structure is laid on the display screen body; the film layer structure is provided with a hole in the bending area.
In one possible design, the film layer structure includes:
the protective film layer is connected to one side of the display screen body through a connecting adhesive layer;
the foam layer is connected to one side, away from the display screen body, of the protective film layer;
at least one of the protective film layer and the foam layer is provided with openings.
In one possible design, the film layer structure includes:
the first supporting layer is connected between the display screen body and the protective film layer; the first supporting layer is connected to one side of the display screen body, and the protective film layer is connected to the first supporting layer through the connecting glue layer.
In one possible design, the protective film layer has openings provided therein.
In one possible design, the protective film layer is made of a material having a modulus of elasticity of 3GPa to 5 GPa.
In one possible design, the material used for the protective film layer is selected from one or more of PET, PMMA or PC.
In one possible embodiment, the opening is a through-hole or a blind hole.
In one possible design, the open area of the openings is 10% to 55% of the area of the bending region.
In one possible design, the film layer structure further includes:
the second supporting layer is connected to one side, away from the protective film layer, of the foam layer;
and the third supporting layer is connected to one side of the second supporting layer, which deviates from the foam layer.
In one possible design, the film layer structure further includes:
and the polarizer layer is connected to one side of the display screen body, which deviates from the protective film layer.
In one possible design, the film layer structure further includes:
the first surface film covering layer is connected to one side, away from the display screen body, of the polarizer layer;
and the second surface cover film layer is connected to one side of the first surface cover film layer, which deviates from the polarizer layer.
The beneficial effect of this application:
the utility model provides a folding display screen has the region of buckling, and folding display screen includes display screen body and membranous layer structure, and on the display screen body was laid to the membranous layer structure, the membranous layer structure was provided with the trompil in the region of buckling. The utility model provides a folding display screen's membranous layer structure is provided with the trompil in the region of buckling to absorb the partial deformation in the membranous layer structure, reduce the deformation volume of trompil rete simultaneously, and then reduce the rete staggered volume at display screen edge, reduce the production of crease.
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 is a schematic structural diagram of a foldable display screen in the prior art;
FIG. 2 is an enlarged view taken at I in FIG. 1;
FIG. 3 is an enlarged view taken at II in FIG. 1;
fig. 4 is a schematic structural diagram of a foldable display screen provided in an embodiment of the present application in a bent state;
fig. 5 is a schematic structural diagram of a foldable display screen provided in an embodiment of the present application in a flattened state;
FIG. 6 is an enlarged view of III of FIG. 5 in the first embodiment;
fig. 7 is an enlarged view of III in fig. 5 under the second embodiment.
Reference numerals:
1' -a display screen body;
100' -a bending region;
2' -a film layer structure;
1-a display screen body;
100-a bending region;
2-film layer structure;
21-a protective film layer;
22-connecting glue layer;
23-a foam layer;
24-a first support layer;
25-a second support layer;
26-a third support layer;
27-a polarizer layer;
28-a first surface cover film layer;
29-a second surface cover film layer;
200-opening the holes.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.
Detailed Description
For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
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 will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element through intervening elements.
The folding display screen has a series of excellent characteristics of small volume, lightness, easy bending, low power consumption, various display modes, simple and convenient installation and the like, can realize diversified application of the display device, and is widely applied to electronic equipment such as folding mobile phones and folding tablet computers. As shown in fig. 1, a typical foldable display screen includes a display screen body 1 ' and a film structure 2 ' connected to the display screen body 1 ', the foldable display screen has a bending region 100 ', and the film structure 2 ' protects the display screen body 1 ' or provides some functional features to the display screen body 1 '. However, after the existing folding display screen is bent for a long time, on one hand, the material cannot be recovered due to plastic deformation, on the other hand, deformation amount is different when the screen is bent due to different curvature radius of each film layer, which finally causes misalignment between the film layers of the film layer structure 2 'at the edge of the display screen (as shown in fig. 2), and a crease is generated in the bent area 100' (as shown in fig. 3), which may affect the visual experience of the folding display screen.
The applicant researches and finds that holes can be designed in a certain film layer or certain film layers in the film layer structure to absorb partial deformation of other film layers, and simultaneously reduce deformation of the hole-forming film layers, so that film layer staggering amount at the edge of the display screen is reduced, and crease generation is reduced.
Based on the consideration, the applicant designs a foldable display screen through deep research, wherein the foldable display screen is provided with a bending area and comprises a display screen body and a film structure, the film structure is laid on the display screen body, and a hole is formed in the bending area by the film structure.
The film layer structure of the folding display screen is provided with the holes in the bending area to absorb partial deformation in the film layer structure, and simultaneously reduce the deformation amount of the hole-forming film layer, so that the film layer staggering amount at the edge of the display screen is reduced, and the generation of creases is reduced.
The folding display screen disclosed by the embodiment of the application can be used in products or parts with display functions such as mobile phones, tablet computers, intelligent wearable devices, televisions, displays, notebook computers and digital photo frames, and can be curled and folded when not in use, and the folding display screen is stored in a small-size form, is convenient to carry and can be unfolded when in use.
According to some embodiments of the present application, as shown in fig. 4 to 6, an embodiment of the present application discloses a foldable display screen, which has a bending region 100, and the foldable display screen includes a display screen body 1 and a film layer structure 2, and the film layer structure 2 is laid on the display screen body 1. The film structure 2 is provided with openings 200 in the bending region 100.
The display screen body 1 is a display tool for displaying a certain electronic document on a screen through a specific transmission device and reflecting the electronic document to human eyes, and may be a CRT (Cathode Ray Tube) display screen, an LCD (Liquid Crystal display) display screen, an LED (Light Emitting diode) display screen, or the like.
The film layer structure 2 plays a role in protecting and supporting the display screen body 1 or endows the display screen body 1 with some functional characteristics. The film layer structure 2 may comprise one or more films.
The openings 200, the openings 200 may include, but are not limited to, a circle, a triangle, a square, etc., and the number of the openings 200 may be one or more. In some embodiments, the number of the openings 200 is plural, and the plural openings 200 are regularly arranged in the bending region 100 in rows and columns.
The film layer structure 2 of the folding display screen of the embodiment is provided with the opening 200 in the bending area 100 to absorb partial deformation in the film layer structure 2, and simultaneously reduce the deformation amount of the opening film layer, thereby reducing the film layer staggering amount at the edge of the display screen and reducing the generation of creases. Experiments prove that the folding display screen can reduce the film staggering amount at the edge of the display screen by 6-10% and the depth of the crease by 5-6% under the condition that the function of the film structure 2 is not influenced.
According to some embodiments of the present application, as shown in fig. 6 and 7, the film layer structure 2 includes:
the protective film layer 21 is connected to one side of the display screen body 1 through a connection glue layer 22.
The foam layer 23 is connected to one side of the protective film layer 21 departing from the display screen body 1.
At least one of the protective film layer 21 and the foam layer 23 has openings 200 disposed therein.
The protective film 21 plays a role in protecting and supporting the display screen body 1, and is generally made of a flexible material to ensure the bending performance of the display screen body. In some embodiments, the material used for the protective film layer 21 is selected from one or more of PET, PMMA or PC.
The foam layer 23 is made of plastic particles, has the characteristics of elasticity, light weight, quick pressure-sensitive fixation, convenience in use, free bending, ultrathin volume, reliable performance and the like, and mainly plays a role in buffering and damping, so that the sound caused by the vibration of the folding display screen in a closed space can be reduced.
It should be noted that the openings 200 provided in at least one of the protective film layer 21 and the foam layer 23 means that the openings 200 may be provided only in the protective film layer 21, the openings 200 may be provided only in the foam layer 23, or the openings 200 may be provided in both the protective film layer 21 and the foam layer 23.
In this embodiment, because protection rete 21 and bubble cotton layer 23 are nearer apart from display screen body 1, set up trompil 200 and can absorb the deformation of display screen body 1 at regional 100 productions of buckling better in these two-layer structure, reduce the deformation volume of trompil rete, and then more be favorable to reducing the rete staggered volume at display screen edge, reduce the production of crease.
According to some embodiments of the present application, as shown in fig. 6 and 7, the film layer structure 2 includes:
the first supporting layer 24 is connected between the display body 1 and the protective film 21. The first supporting layer 24 is connected to one side of the display screen body 1, and the protective film layer 21 is connected to the first supporting layer 24 through the connecting adhesive layer 22.
The first supporting layer 24, which has a supporting function for the display screen body 1, is generally made of a metal material with a certain rigidity. In some embodiments, the first support layer 24 may be made of a stainless steel material.
Through set up first supporting layer 24 between display screen body 1 and protection film 21, can play fine supporting effect to display screen body 1, be favorable to folding display screen's exhibition flat.
According to some embodiments of the present application, as shown in fig. 6 and 7, the protective film layer 21 has an opening 200 disposed therein.
Through set up trompil 200 in protective film layer 21, can absorb the deformation of display screen body 1 in regional 100 productions of buckling better, reduce the deformation volume of trompil rete, and then more be favorable to reducing the rete staggered amount at display screen edge, reduce the production of crease.
According to some embodiments of the present application, the protective film layer 21 is made of a material having a modulus of elasticity of 3GPa to 5 GPa.
Alternatively, the elastic modulus of the material used for the protective film layer 21 may be 3GPa, 3.2GPa, 3.4GPa, 3.6GPa, 3.8GPa, 4.0GPa, 4.2GPa, 4.4GPa, 4.6GPa, 4.8GPa, or 5GPa, or the like, and may be other values within the above range, which is not limited herein.
The elastic modulus of the material adopted by the protective film layer 21 is specifically limited, so that the protective film layer 21 can be endowed with better protective supporting function and bending performance, and if the elastic modulus of the material adopted by the protective film layer 21 is less than 3GPa, the bending performance of the protective film layer 21 is poor, so that the folding display screen is difficult to bend, and the situation that the folding display screen is difficult to flatten after being bent and creases easily occur is caused. If the elastic modulus of the material used for the protective film layer 21 is greater than 5GPa, the protective film layer 21 has poor protective supporting effect, which may affect the flatness of the folded display after being flattened.
According to some embodiments of the present application, the opening 200 may be a through hole as shown in fig. 6.
The through hole is a hole penetrating in the film thickness direction of the film layer structure 2.
According to some embodiments of the present application, the opening 200 may also be a blind hole as shown in FIG. 7.
The blind hole refers to a hole which is opened at one end along the thickness direction of the film layer structure 2 and closed at the other end.
According to some embodiments of the present application, the open area of the openings 200 comprises 10% -55% of the area of the bend region 100.
Alternatively, the percentage of the area of the opening 200 to the area of the bending region 100 may be 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, etc., or may be other values within the above range, which is not limited herein.
By specifically limiting the percentage of the area of the opening 200 in the area of the bending region 100, the depth of the crease can be effectively improved without affecting the supporting function of the opening film layer. If the percentage of the opening area of the opening 200 in the area of the bending region 100 is less than 10%, the improvement effect on the fold depth is not significant, and if the percentage of the opening area of the opening 200 in the area of the bending region 100 is greater than 55%, the area of the opening 200 is too large, which may affect the supporting function of the opening film layer.
According to some embodiments of the present application, as shown in fig. 6 and 7, the film layer structure 2 further includes:
and a second supporting layer 25 connected to the side of the foam layer 23 away from the protective film layer 21.
A third support layer 26 connected to the second support layer 25 on the side facing away from the foam layer 23.
The second supporting layer 25 plays a good role in supporting the display screen body 1, and is beneficial to the flattening degree of the display screen body after being flattened. The second support layer 25 is generally made of a rigid metal material. In some embodiments, the second support layer 25 is made of a stainless steel material.
The third supporting layer 26 plays a good supporting role for the display screen body 1, and is beneficial to the flatness of the display screen body after being flattened. The third support layer 26 is typically made of a rigid metal material. In some embodiments, the third support layer 26 is made of a copper material.
Set up second supporting layer 25 and third supporting layer 26 through the one side at display screen body 1, can realize the better supporting effect to display screen body 1, more be favorable to folding the whole roughness behind the display screen exhibition paper.
According to some embodiments of the present application, as shown in fig. 6 and 7, the film layer structure 2 further includes:
and the polarizer layer 27 is connected to one side of the display screen body 1, which is far away from the protective film layer 21.
The polarizer layer 27 is made according to the polarization principle of light, has a special function of effectively eliminating glare, and can improve the visual effect of a user. The basic structure of the polarizer includes: the most central PVA (polyvinyl alcohol), two layers of TAC (cellulose triacetate), PSA film (pressure sensitive adhesive), Release film (Release film) and Protective film (Protective film). The PVA layer plays a role in polarization, but is very easy to hydrolyze, and in order to protect the physical characteristics of the polarizing film, a (TAC) film with high light transmittance, good water resistance and certain mechanical strength is compounded on each of two sides of the PVA for protection, so that the original polarizer plate is formed. In the production of common TN type LCD polaroids, according to different use requirements, one side of a polaroid original plate is coated with PSA with a certain thickness, and an isolating film for protecting the PSA is compounded; and a protective film, a reflective film and a semi-transparent and semi-reflective adhesive layer film are respectively compounded on the other side according to the product type, so that a finished polaroid product is formed.
One side of the display screen body 1 departing from the protective film layer 21 is provided with the polarizer layer 27, so that glare of the folding display screen can be effectively eliminated, and the visual effect of a user is improved.
According to some embodiments of the present application, as shown in fig. 6 and 7, the film layer structure 2 further includes:
the first surface cover film layer 28 is connected to a side of the polarizer layer 27 away from the display screen body 1.
A second surface cover film layer 29 is attached to the first surface cover film layer 28 on the side facing away from the polarizer layer 27.
First surface tectorial membrane layer 28 plays the guard action to the one side that display screen body 1 shows, generally adopts flexible transparent material to make, is favorable to folding display screen's the buckling on the one hand, and on the other hand keeps certain light transmissivity, does not exert an influence to the demonstration of display screen body 1. In some embodiments, the first surface cap film layer 28 may be made of polyimide, polycarbonate, polyethylene terephthalate, or the like.
Second surface tectorial membrane layer 29 plays the guard action to the one side that display screen body 1 shows, generally adopts flexible transparent material to make, is favorable to buckling of folding display screen on the one hand, and on the other hand does not exert an influence to the demonstration of display screen body 1. In some embodiments, the second surface cover film layer 29 may be made of polyimide, polycarbonate, polyethylene terephthalate, or the like.
Through set up first surface tectorial membrane layer 28 and second surface tectorial membrane layer 29 in the demonstration one side of display screen body 1, can play the dual protection effect to display screen body 1.
Example 1
The embodiment of the application provides a folding display screen, as shown in fig. 4-6, the folding display screen has a bending area 100, the folding display screen includes a display screen body 1 and a film layer structure 2, and the film layer structure 2 is laid on the display screen body 1. Film structure 2 includes first supporting layer 24, protection film layer 21, the cotton layer 23 of bubble, second supporting layer 25, third supporting layer 26, polaroid layer 27, first surface rete 28 and second surface rete 29, first supporting layer 24 is connected in one side of display screen body 1, protection film layer 21 connects in first supporting layer 24 through connecting glue film 22, the cotton layer 23 of bubble is connected in one side that protection film layer 21 deviates from first supporting layer 24, second supporting layer 25 is connected in one side that the cotton layer 23 of bubble deviates from protection film layer 21, third supporting layer 26 is connected in one side that second supporting layer 25 deviates from the cotton layer 23 of bubble. Polarizer layer 27 is connected in the one side that deviates from protection film layer 21 of display screen body 1, and first surface rete 28 is connected in the one side that polarizer layer 27 deviates from display screen body 1, and second surface rete 29 is connected in the one side that first surface rete 28 deviates from polarizer layer 27. The protective film layer 21 is provided with openings 200, the openings 200 are through holes, and the area of the openings 200 accounts for 10% -55% of the area of the bending region 100. The elastic modulus of the material used for the protective film layer 21 is 3GPa-5GPa, and the material used for the protective film layer 21 is selected from PET.
Example 2
As shown in fig. 7, the foldable display screen of the present embodiment has the same technical features as embodiment 1 except that the opening 200 is a blind hole.
Comparative example
The folding display panel of the present embodiment has the same technical features as those of embodiment 1, except that the opening 200 is not provided in the protective film layer 21.
The folding display panels of examples 1-2 and comparative example were subjected to a bending test, and the test results are shown in table 1 below.
Table 1 table comparing test results of examples 1-2 and comparative examples
| Example 1 | Example 2 | Comparative example | |
| Film layer staggering amount/mum at edge of display screen | 368 | 380 | 408 |
| Crease depth/mum | 50.7 | 50.3 | 53.5 |
As can be seen from the result of table 1, compare in the folding display screen that does not set up the trompil in membranous layer structure, the folding display screen of this application is buckling the test back, and the rete amount of staggering at edge obviously reduces, and the crease degree of depth also obviously reduces.
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 (11)
1. A foldable display, characterized in that the foldable display has a bending area (100), the foldable display comprising:
a display screen body (1);
the film layer structure (2) is laid on the display screen body (1); the film layer structure (2) is provided with an opening (200) in the bending area (100).
2. A foldable display screen according to claim 1, wherein the film layer structure (2) comprises:
the protective film layer (21) is connected to one side of the display screen body (1) through a connecting glue layer (22);
the foam layer (23) is connected to one side, away from the display screen body (1), of the protective film layer (21);
at least one of the protective film layer (21) and the foam layer (23) is provided with openings (200).
3. A foldable display screen according to claim 2, characterized in that the film layer structure (2) comprises:
the first supporting layer (24) is connected between the display screen body (1) and the protective film layer (21); first supporting layer (24) connect in one side of display screen body (1), protection rete (21) pass through connect glue film (22) connect in first supporting layer (24).
4. A foldable display screen according to claim 2, characterised in that the protective film layer (21) has apertures (200) provided therein.
5. A foldable display screen according to claim 2, characterised in that the protective film (21) is made of a material having a modulus of elasticity of 3GPa to 5 GPa.
6. A folding display screen according to claim 5, characterised in that the protective film layer (21) is made of a material selected from one or more of PET, PMMA or PC.
7. A foldable display screen according to claim 1, characterised in that the openings (200) are through holes or blind holes.
8. A foldable display screen according to claim 1, wherein the area of the openings (200) is between 10% and 55% of the area of the bending area (100).
9. A foldable display screen according to claim 2, wherein the film layer structure (2) further comprises:
a second supporting layer (25) connected to the side of the foam layer (23) facing away from the protective film layer (21);
a third supporting layer (26) connected to the second supporting layer (25) on the side facing away from the foam layer (23).
10. A foldable display screen according to claim 2, wherein the film layer structure (2) further comprises:
and the polarizer layer (27) is connected to one side of the display screen body (1) departing from the protective film layer (21).
11. A foldable display screen according to claim 10, wherein the film layer structure (2) further comprises:
the first surface film covering layer (28) is connected to one side, away from the display screen body (1), of the polarizer layer (27);
a second surface cover film layer (29) attached to a side of the first surface cover film layer (28) facing away from the polarizer layer (27).
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