CN113870709B - display device - Google Patents
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- CN113870709B CN113870709B CN202111150135.2A CN202111150135A CN113870709B CN 113870709 B CN113870709 B CN 113870709B CN 202111150135 A CN202111150135 A CN 202111150135A CN 113870709 B CN113870709 B CN 113870709B
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- protective adhesive
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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Abstract
The present disclosure relates to a display device including: the display substrate comprises a first flat part and a second flat part, wherein the first flat part and the second flat part of the display substrate are connected through a bending part, the first flat part is provided with a light emitting side and a backlight side, and the backlight side is opposite to the second flat part; a polarizing layer positioned at the light-emitting side of the first flattening portion; a supporting heat dissipation layer located between the backlight side of the first flat portion and the second flat portion; the first protective adhesive layer is contacted with the polarizing layer, the second protective adhesive layer is contacted with one end of the first protective adhesive layer, which is far away from the polarizing layer, and extends towards the direction, which is close to the second flat layer, of the first protective adhesive layer, the thickness range of the first protective adhesive layer is forty percent to sixty percent of the thickness of the polarizing layer, and the thickness of the second protective adhesive layer is smaller than or equal to the thickness of the first protective adhesive layer and the thickness of the second protective adhesive layer is at least forty percent of the thickness of the polarizing layer.
Description
Technical Field
The disclosure relates to the technical field of display device manufacturing, and in particular relates to a display device.
Background
Currently, in the field of display device manufacturing technology, in order to obtain a very narrow bezel of visual experience, current designs have greatly brought the edge of the polarizer close to the starting position of the bending region of the display substrate. To accommodate this design, the protective glue layer has been applied to the polarizing layer in contact with the display substrate.
However, when the protective adhesive layer contacts with the polarizing layer, because of the acting force of the interface, the siphon phenomenon occurs at one end of the protective adhesive layer close to the polarizing layer, so that the thickness of the protective adhesive layer close to one end of the polarizing layer can reach more than ninety percent of the thickness of the polarizing layer, and the thickness of the protective adhesive layer at the other part is only forty to sixty percent of the thickness of the polarizing layer, so that the problem of uneven coating thickness of the protective adhesive layer is caused, and further the problem of current interruption of technical wiring on the display substrate caused by uneven stress distribution when the display substrate is bent is caused.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The disclosure aims to provide a display device, which can solve the problem of uneven thickness distribution of a protective adhesive layer, and further solve the problem of metal wiring breakage when a display substrate is bent.
An aspect of the present disclosure provides a display device including:
the display substrate is provided with a bending part, a first flattening part and a second flattening part which are oppositely arranged, wherein the first flattening part and the second flattening part are connected through the bending part, the first flattening part is provided with a light emitting side and a backlight side, and the backlight side is opposite to the second flattening part;
a polarizing layer located on the light-emitting side of the first flattening portion;
a support heat dissipation layer located between the backlight side of the first flat portion and the second flat portion;
the protection glue layer is at least located the bending part is far away from one side of supporting the heat dissipation layer and one side of partly keeping away from the supporting the heat dissipation layer of first flat portion, the protection glue layer has first protection glue portion and second protection glue portion, first protection glue portion with the polarisation layer contact, the second protection glue portion with first protection glue portion is kept away from the one end contact of polarisation layer to be close to the direction of second flat portion extends, the thickness range of first protection glue portion is forty percent to sixty percent of polarisation layer thickness, the thickness of second protection glue portion is less than or equal to first protection glue portion thickness and the thickness of second protection glue is at least forty percent of polarisation layer thickness.
In an exemplary embodiment of the present disclosure, the first protective glue portions have equal thickness, the second protective glue portions have equal thickness, and the first protective glue portions have the same thickness as the second protective glue portions.
In an exemplary embodiment of the present disclosure, the first protective glue portion is provided with a first protective glue and the second protective glue portion is provided with a second protective glue; the fluidity of the first protective glue is smaller than that of the second protective glue, and the curing speed of the first protective glue is faster than that of the second protective glue.
In an exemplary embodiment of the disclosure, the first protective adhesive portion is located at a side of the first flat portion away from the supporting heat dissipation layer, and a distance between a projection of an end of the first protective adhesive portion away from the polarizing layer on the first flat portion and an end of the bending portion close to the first flat portion is greater than or equal to 0.05mm.
In an exemplary embodiment of the present disclosure, the first and second protective paste portions are provided with a third protective paste, which is an ultraviolet curable paste doped with a covalent bond or an ionic bond.
In one exemplary embodiment of the present disclosure, the first and second protective paste portions are provided with a fourth protective paste, which is an ultraviolet curable paste doped with particles having anisotropic motion properties.
In one exemplary embodiment of the present disclosure, a plurality of first protrusions extending in a second direction are provided at one end of the polarizing layer near the first protective adhesive part, the first protective adhesive part being in contact with the plurality of first protrusions;
the second direction is a direction from the polarizing layer to the first protective adhesive part.
In an exemplary embodiment of the present disclosure, the projections of the first protrusions extending in the second direction on the display substrate are zigzag.
In an exemplary embodiment of the present disclosure, a plurality of second protrusions extending in a first direction are disposed on a side of the display substrate adjacent to the protective adhesive layer, and the first protective adhesive portion and the second protective adhesive portion are in contact with the second protrusions;
the first direction is a direction from the display substrate to the protective adhesive layer.
In an exemplary embodiment of the present disclosure, the first protective paste contacts the second protective paste, and one end of the first protective paste contacting the second protective paste is provided with a plurality of third protrusions extending in a second direction, and the second protective paste contacts the plurality of third protrusions;
the second direction is a direction from the polarizing layer to the first protective adhesive part.
The technical scheme provided by the disclosure can achieve the following beneficial effects:
the disclosure provides a display device, wherein a protective adhesive layer in the display device is at least positioned on one side of a bending part far away from a supporting heat dissipation layer and one side of a part of a first flat part far away from the supporting heat dissipation layer. The first protective adhesive portion may be in contact with the polarizing layer, and the thickness of the first protective adhesive portion ranges from forty percent to sixty percent of the thickness of the polarizing layer. Therefore, the thickness of the first protective adhesive part is not overlarge when the first protective adhesive part is contacted with the polarizing layer, and the uniformity of the protective adhesive layer is further ensured.
In addition, the thickness of the second protective adhesive portion may be less than or equal to the thickness of the first end of the first protective adhesive portion, and the thickness of the second protective adhesive portion is at least forty percent of the thickness of the polarizing layer. Therefore, the thickness difference between the second protective adhesive part and the first protective adhesive part is smaller, and the protective adhesive layer can be further even. Therefore, the protective adhesive layer can be stressed more uniformly in the bending process, so that the metal wiring in the display substrate cannot be broken, and the product yield of the display device is effectively improved.
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 disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.
Fig. 1 illustrates a schematic structure of a display device according to an exemplary embodiment of the present disclosure;
FIG. 2 illustrates an expanded schematic view of a portion of the structure of FIG. 1 in accordance with an exemplary embodiment of the present disclosure;
FIG. 3 illustrates a schematic structure of a polarizing layer according to an exemplary embodiment of the present disclosure;
FIG. 4 shows an expanded schematic view of a portion of the structure of FIG. 1 according to another exemplary embodiment of the present disclosure;
fig. 5 illustrates a schematic structure of a first protective paste according to an exemplary embodiment of the present disclosure;
fig. 6 illustrates a schematic structure of a display device according to another exemplary embodiment of the present disclosure;
fig. 7 illustrates a schematic structure of a display device according to still another exemplary embodiment of the present disclosure;
fig. 8 illustrates a flow chart of a method of manufacturing a display device according to an exemplary embodiment of the present disclosure;
fig. 9 illustrates a flow chart of a method of manufacturing a display device according to another exemplary embodiment of the present disclosure.
Reference numerals illustrate:
1. a display substrate; 2. a polarizing layer; 3. supporting the heat dissipation layer; 4. a first protective adhesive portion; 5. a second protective adhesive portion; 6. an optical adhesive layer; 7. a cover plate; 8. a substrate base; 11. a bending part; 12. a first flat portion; 13. a second flat portion; 14. a second protrusion; 21. a first protrusion; 31. a first back film; 32. a heat dissipation layer; 33. a support layer; 34. a second back film; 41. a third protective adhesive; 42. fourth protective glue; 43. and a third protrusion.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.
Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.
The terms "a," "an," "the," and "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first" and "second" and the like are used merely as labels, and are not intended to limit the number of their objects.
The disclosure firstly provides a display device, as shown in fig. 1 to 7, the display device can make the thickness of a coated protective glue layer uniform, and then can make the stress of a bending part 11 of a display substrate 1 more uniform in the bending process, and can also effectively solve the problem that a metal wire of the display substrate 1 breaks during bending.
Specifically, the display device may include a display substrate 1, a polarizing layer 2, a supporting heat dissipation layer 3, and a protective adhesive layer. The display substrate 1 may be a flexible display substrate 1, and may have a bending portion 11, a first flat portion 12 and a second flat portion 13 disposed opposite to each other. The first flattening portion 12 may have a light emitting side and a backlight side. It should be noted that the light emitting side of the first flat portion 12 may not fill the entire first flat portion 12, i.e., it is understood that the first flat portion 12 may also have a light emitting region and a non-light emitting region, wherein the light emitting region may have a light emitting side. The present disclosure is not limited to the first flat portion 12, that is, the first flat portion 12 may emit light at all or part of the light, and may be selected according to practical situations. Meanwhile, when the first flattening portion 12 of the present disclosure has a light emitting area and a non-light emitting area, the present disclosure does not limit the ratio of the light emitting area and the non-light emitting area of the first flattening portion 12, which may also be selected according to actual needs, which is within the scope of the present disclosure.
In one embodiment of the present disclosure, the backlight side may be disposed opposite to the second flat portion 13. It should be noted that, the arrangement of the backlight side opposite to the second flat portion 13 herein refers to a state of the display substrate 1 provided in the present disclosure in normal operation, that is: when the display substrate 1 is bent, the backlight side and the second flat portion 13 are disposed opposite to each other. When the display substrate 1 is not bent, the first flat portion 12 and the second flat portion 13 are on the same plane, and the backlight side and the second flat portion 13 are not disposed opposite to each other.
The polarizing layer 2 may be located on the light-emitting side of the first flattening portion 12. When the first flattening portion 12 has a light emitting region and a non-light emitting region, the polarizing layer 2 may be located at the light emitting region, i.e., the polarizing layer 2 may be located at the light emitting side of the light emitting region.
The supporting heat dissipation layer 3 may be located between the backlight side of the first flat portion 12 and the second flat portion 13. The supporting heat dissipation layer 3 may include: a first backing film 31, a heat dissipation layer 32, a support layer 33, and a second backing film 34. Wherein the first back film 31 may be located at the backlight side of the first flat portion 12, and the first back film 31 may be attached to the backlight side of the first flat portion 12. The heat dissipation layer 32 may be located at a side of the first back film 31 remote from the first flat portion 12 for dissipating heat emitted from the display substrate 1. The support layer 33 may be located on a side of the heat dissipation layer 32 remote from the first flat portion 12 for supporting between the first flat portion 12 and the second flat portion 13. And the flattening part can also shield external interference signals. The second back film 34 may be located on a side of the support layer 33 away from the first flat portion 12, and a side of the second back film 34 away from the first flat portion 12 may be fitted with a side of the second flat portion 13 close to the first flat portion 12.
In one embodiment of the present disclosure, the protective adhesive layer may be at least located on a side of the bent portion 11 away from the supporting heat dissipation layer 3 and a side of a portion of the first flat portion 12 away from the supporting heat dissipation layer 3. It is understood that the protective glue layer may be arranged in the same layer as the polarizing layer 2. The display substrate 1 can be enabled to be uniformly stressed at the bending part 11 in the bending process by arranging the protective adhesive layer, and the metal wiring on the display substrate 1 is prevented from being broken.
In one embodiment of the present disclosure, as shown in fig. 1-2, the protective adhesive layer may have a first protective adhesive portion 4 and a second protective adhesive portion 5. Wherein the first protective adhesive portion 4 may be in contact with the polarizing layer 2, the second protective adhesive portion 5 may be in contact with an end of the first protective adhesive portion 4 away from the polarizing layer 2, and the second protective adhesive portion 5 may extend in a direction approaching the second flat portion 13.
In addition, the thickness of the first protective adhesive portion 4 may range from forty to sixty percent of the thickness of the polarizing layer 2, for example: forty percent, fifty percent, sixty percent, etc., and therefore the present disclosure can make the thickness of the first protective adhesive portion 4 not be too large when the first protective adhesive portion 4 contacts the polarizing layer 2, thereby ensuring uniformity of the protective adhesive layer. Meanwhile, the thickness of the second protective paste portion 5 may be less than or equal to the thickness of the first protective paste portion 4 and the thickness of the second protective paste portion 5 is at least forty percent of the thickness of the polarizing layer 2. It can be appreciated that the thickness of the second protective glue portion 5 may be equal to the thickness of the first protective glue portion 4, or the thickness of the second protective glue portion 5 may be smaller than the thickness of the first protective glue portion 4, but the thickness of the second protective glue portion 5 is relatively close to the thickness of the first protective glue portion 4, so that uniformity of the thickness of the whole protective glue layer is ensured. Thus, the present disclosure further makes the thickness of the second protective adhesive portion 5 less different from the thickness of the first protective adhesive portion 4, and can further make the protective adhesive layer more uniform. Therefore, the protective adhesive layer can be stressed more uniformly in the bending process, so that the metal wiring in the display substrate 1 cannot be broken, and the product yield of the display device is effectively improved.
In one embodiment of the present disclosure, as shown in fig. 3, an end of the polarizing layer 2 near the first protective adhesive part 4 may be provided with a plurality of first protrusions 21 extending in the second direction, and the first protective adhesive part 4 may be in contact with the plurality of first protrusions 21. The second direction may be a direction from the polarizing layer 2 to the first protective adhesive portion 4. The protection glue in the first protection glue portion 4 can be in better and easier contact and lamination with the polarizing layer 2 through the plurality of first bulges 21 arranged on the polarizing layer 2, so that the protection glue in the first protection glue portion 4 is easier in the coating process, and the protection effect of the first protection glue portion 4 is better.
In one embodiment of the present disclosure, the projections of the plurality of first protrusions 21 extending in the second direction on the display substrate 1 are zigzag. Also, a plurality of first protrusions 21 extending in the second direction may penetrate the polarizing layer 2 in the first direction, and it is understood that the thickness of the plurality of first protrusions 21 may be the same as the thickness of the polarizing layer 2. By setting the first protrusions 21 to be zigzag and making the thickness of the first protrusions 21 the same as the thickness of the polarizing layer 2, the formation step of the first protrusions 21 can be simplified on the basis of ensuring easy contact and adhesion of the first protrusions 21 with the first protective adhesive portion 4, and further the manufacturing step of the display device provided by the present disclosure can be simplified. The first direction is a direction from the display substrate 1 to the protective glue layer.
In addition, as shown in fig. 4, a side of the display substrate 1 near the protective adhesive layer may be provided with a plurality of second protrusions 14 extending in the first direction, and the first protective adhesive portion 4 and the second protective adhesive portion 5 may be in contact with the second protrusions 14. The second protrusion 14 is arranged, so that the first protective adhesive part 4 and the second protective adhesive part 5 are bonded with the display substrate 1 more firmly, and the problem that the first protective adhesive part 4 and the second protective adhesive part 5 are separated due to the fact that the first protective adhesive part 4 and the second protective adhesive part 5 are not bonded firmly in the bending process of the display substrate 1 can be prevented, and the display substrate 1 can be further prevented from being damaged in the bending process.
Further, in order to prevent the second protrusion 14 from affecting the display effect of the display substrate, the second protrusion 14 may not be disposed in the light emitting region, that is, the second protrusion 14 may be disposed only in a portion of the display substrate 1 that may be covered by the protective adhesive layer.
It should be noted that the number and the size of the first protrusions 21 and the second protrusions 14 are not limited in this disclosure, and may be set according to actual needs, which is within the scope of protection of this disclosure.
In one embodiment of the present disclosure, the thicknesses of the first protective adhesive portions 4 may be equal everywhere, the thicknesses of the second protective adhesive portions 5 may be equal everywhere, and the thicknesses of the first protective adhesive portions 4 may be the same as the thicknesses of the second protective adhesive portions 5. Therefore, the thickness of the whole protective adhesive layer is the same everywhere, and the problem of uneven stress is further avoided compared with the prior art.
In one embodiment of the present disclosure, the first protective paste portion 4 may be provided with a first protective paste and the second protective paste portion 5 may be provided with a second protective paste. Wherein the first protective adhesive may be in contact with a side of the polarizing layer 2 near the bending portion 11, and the first protective adhesive may have a property of being able to restrict movement of itself in the first direction. It is understood that the first protective adhesive described herein can restrict the movement of the first protective adhesive in the first direction means that the first protective adhesive does not substantially flow or move in the first direction after being applied to the display substrate 1, and thus the thickness of the first protective adhesive is not substantially increased in the first direction, and thus the thickness of the first protective adhesive portion 4 can be in the range of forty to sixty percent of the thickness of the polarizing layer 2.
Since the polarizing layer 2 provided by the present disclosure has the first protrusions 21 extending in the second direction, the first protrusions 21 may have a larger roughness and a larger surface energy, thus making the edges of the first protrusions 21 have a stronger hydrophilicity. While the protective paste commonly used in the art has a strong fluidity so that when the protective paste contacts with the edge of the first protrusion 21, it easily flows upward along the first contact portion of the polarizing layer 2 due to a strong surface tension, that is: the protective paste flows along the edge of the polarizing layer 2 in the first direction. And the protective adhesive layer is siphoned due to the phenomenon.
However, the first protective adhesive provided by the present disclosure may contact with an end of the polarizing layer 2 near the bending portion 11, and has a property of being able to restrict movement of itself in the first direction, so that the first protective adhesive does not flow or move in the first direction due to a strong surface tension of the edge of the first protrusion, and thus the first protective adhesive is able to not generate a siphon phenomenon. Therefore, the thickness distribution of the protective adhesive layer is uniform, and the problem that the metal wiring on the display substrate 1 is broken in the bending process of the display substrate 1 due to the non-uniform thickness distribution of the protective adhesive layer when the display substrate 1 is bent can be solved, so that the product yield of the display device can be improved.
In one embodiment of the present disclosure, the first protective adhesive portion 4 may be located on a side of the first flat portion 12 remote from the supporting heat dissipation layer 3. When the first flattening portion 12 has a light emitting region and a non-light emitting region, the first protective adhesive portion 4 may be located in the non-light emitting region.
The fluidity of the first protective glue may be smaller than that of the second protective glue, and the curing speed of the first protective glue may be faster than that of the second protective glue. For example: the curing time of the first protective adhesive can be less than or equal to 0.3s, and the curing speed can be greater than or equal to 150mm/s; the curing time of the second protective paste may be 3 to 5 seconds. When the first protective adhesive is coated on the side of the first flat portion 12 far away from the supporting heat dissipation layer 3, the surface of the first protective adhesive can be quickly solidified to form a solid state due to low fluidity and high solidification speed, so that the first protective adhesive can be limited to move along the first direction, and the first protective adhesive can be prevented from siphoning. In an embodiment of the present disclosure, the first protective adhesive may be a visible light curing adhesive, but is not limited thereto, and may be other curing adhesives, which only need to satisfy the above conditions, and may be selected according to actual needs, which is within the scope of protection of the present disclosure.
In one embodiment of the present disclosure, the first protective paste may be in contact with the second protective paste, and as shown in fig. 5, one end of the first protective paste in contact with the second protective paste may be provided with a plurality of third protrusions 43 extending in the second direction, and the second protective paste may be in contact with the plurality of third protrusions 43. The first protection glue and the second protection glue can be better and easier to contact and attach by arranging the plurality of third bulges 43 at one end of the first protection glue, which is contacted with the second protection glue.
In one embodiment of the present disclosure, the projections of the plurality of third protrusions 43 extending in the second direction on the display substrate are zigzag, but not limited thereto, and the shape of the third protrusions 43 may be other shapes, which is within the scope of the present disclosure.
And, because the first protective adhesive is solidified from the liquid state to form the solid state, the surface roughness is smaller, the surface energy is smaller, and the surface of the first protective adhesive presents hydrophobicity or weaker hydrophilicity. Therefore, when the liquid second protective adhesive contacts the cured first protective adhesive, the weaker surface energy of the first protective adhesive can prevent the second protective adhesive from moving along the edge of the first protective adhesive in the first direction. Therefore, when the second protective adhesive is in contact with the first protective adhesive, siphonage is not generated, so that the thicknesses of the first protective adhesive part 4 and the second protective adhesive part 5 are more uniform, and the thickness of the second protective adhesive part 5 is less than or equal to the thickness of the first protective adhesive part 4 and is at least forty percent of the thickness of the polarizing layer 2.
Thus, the present disclosure can prevent the siphon phenomenon occurring between the first protective adhesive and the second protective adhesive while preventing the siphon phenomenon between the first protective adhesive and the polarizing layer 2 by providing the first protective adhesive.
In one embodiment of the present disclosure, when the first protective adhesive portion 4 is provided with the first protective adhesive and the second protective adhesive portion 5 is provided with the second protective adhesive, a distance between a projection of an end of the first protective adhesive portion 4 away from the polarizing layer 2 on the first flat portion 12 and an end of the bending portion 11 near the first flat portion 12 may be greater than or equal to 0.05mm. In particular, since the first protective adhesive has a lower fluidity and a stronger curing property, the elastic modulus thereof is higher than that of the second protective adhesive, that is, bending is less likely to occur than that of the second protective adhesive. Therefore, in order to prevent the first protective paste from affecting the bent portion 11, it is necessary to have a certain distance between the first protective paste and the bent portion 11. The distance may be a minimum of 0.05mm.
In one embodiment of the present disclosure, the first protective paste may be coated on the first flat portion 12 first, and after the first protective paste is cured, the second protective paste may be coated on the display substrate 1. Considering the minimum glue output of the glue spreading device, while the first protective glue cannot be applied to the bending area, the distance between the projection of the end of the first protective glue away from the polarizing layer 2 on the first flat portion 12 and the end of the bending portion 11 close to the first flat portion 12 can be set to 0.1mm. Through setting up this distance value, can make the isolation polarizing layer 2 that first protection glued can be better and second protection glue to can further improve the yield of product.
In one embodiment of the present disclosure, the coating thickness and mechanical parameters of the second protective paste are more consistent with the stress distribution properties of the bent portion 11 than the first protective paste. The second protective adhesive may be an ultraviolet curing adhesive, but is not limited thereto, and may be other curing adhesives. The first protective adhesive of the present disclosure may be: light-cured adhesives such as Wilden 1008 and irish TF 3348.
Further, in order to ensure uniformity of the thickness of the protective adhesive layer, the thickness of the first protective adhesive applied during the coating process may be the same as the thickness of the second protective adhesive applied during the coating process.
As shown in fig. 6, in another embodiment of the present disclosure, the first and second protective adhesive parts 4 and 5 may be provided with a third protective adhesive 41, i.e., only one protective adhesive is used for the protective adhesive layer in the present embodiment. The third protective paste 41 may be an ultraviolet curable paste doped with covalent bonds or ionic bonds. The third protective paste 41 can be made anisotropic by doping a covalent bond or an ionic bond in the ultraviolet curable paste. The internal force of the third protective paste 41 in the first direction is far greater than the interfacial force of the edge of the polarizing layer 2 due to the covalent bond or the ionic bond, so that the third protective paste 41 only moves in the planar direction after being applied, but does not move in the first direction, and thus the third protective paste 41 is prevented from siphoning. It is understood that the planar direction referred to herein may be the extending direction of the display substrate 1.
However, the protective adhesive layer is not limited thereto, and two kinds of protective adhesives may be provided, that is, the third protective adhesive 41 doped with covalent bond or ionic bond is provided in the first protective adhesive portion 4, and the second protective adhesive in the above embodiment is provided in the second protective adhesive portion 5, that is: the ultraviolet curing adhesive is within the protection scope of the present disclosure, and can be selected according to actual needs.
In this embodiment, the third protective glue 41 may additionally form a covalent bond or an ionic bond in the uv-curable glue by doping a carbon-carbon triple bond or pi stacking bond in the conventional uv-curable glue, but is not limited thereto, and the third protective glue 41 may also be formed by doping other chemical bonds, which is within the scope of the present disclosure.
As shown in fig. 7, in still another embodiment of the present disclosure, the first and second protective adhesive parts 4 and 5 may be provided with a fourth protective adhesive 42, i.e., the protective adhesive layer in this embodiment uses only one protective adhesive. The fourth protective paste 42 may be an ultraviolet curable paste doped with particles having anisotropic motion properties. By doping particles with anisotropic motion properties in the uv curable glue, the particles with anisotropic motion properties of the fourth protective glue 42 can have interaction forces between them, so that different particles can move in a fixed direction, i.e. by doping particles with anisotropic motion properties, each particle can only move in a planar direction but not in a first direction, thus limiting the motion properties of the fourth protective glue 42 in the first direction, and thus the fourth protective glue 42 can not siphon.
Further, the protective adhesive layer may be provided with two kinds of protective adhesives, that is, the fourth protective adhesive 42 doped with particles having anisotropic motion properties is provided in the first protective adhesive portion 4, and the second protective adhesive in the above embodiment is provided in the second protective adhesive portion 5: the ultraviolet curing adhesive is within the protection scope of the present disclosure, and can be selected according to actual needs.
In an embodiment, the fourth protective paste 42 may be formed by adding particles having anisotropic movement properties to a conventional uv curable paste, wherein the particles having anisotropic movement properties may be: metal particles having magnetism or silicon oxide ceramic particles having si—si bonds, but are not limited thereto.
In this embodiment, the diameter of the particles with anisotropic motion performance may be 3um to 5um, but is not limited thereto, and the present disclosure is not limited thereto, and may be selected according to actual needs, which is within the scope of protection of the present disclosure.
In one embodiment of the present disclosure, the display device may further include an optical adhesive layer 6, a cover plate 7, and a substrate base plate 8. Wherein the optical adhesive layer 6 may be located at a side of the polarizing layer 2 away from the first flattening portion 12; the cover plate 7 may be located on the side of the optical cement layer 6 remote from the first flattened portion 12; the substrate 8 may be located at a side of the display substrate 1 remote from the protective adhesive layer and partially between the first back film 31 and the display substrate 1 and between the second back film 34 and the display substrate 1.
It should be noted that, the display device further includes other necessary components and components, for example, a display, specifically, a housing, a circuit board, a power cord, etc., which can be correspondingly supplemented by those skilled in the art according to specific usage requirements of the display device, and will not be described herein.
The second aspect of the present disclosure provides a method for manufacturing a display device, by which the thickness of a coated protective adhesive layer can be uniform, so that the stress of a bending portion 11 of a display substrate 1 in a bending process is more uniform, and the problem that a metal wire of the display substrate 1 is broken during bending can be effectively solved. The method for manufacturing a display device can manufacture the display device described above.
Specifically, as shown in fig. 8, the manufacturing method of the display device may include:
in step S10, a display substrate 1 is provided, where the display substrate 1 has a bending portion 11, a first flat portion 12 and a second flat portion 13 disposed opposite to each other, the first flat portion 12 and the second flat portion 13 are connected by the bending portion 11, the first flat portion 12 has a light emitting side and a backlight side, and the backlight side is opposite to the second flat portion 13.
In step S20, the polarizing layer 2 is disposed on the light-emitting side of the first flattening portion 12.
In step S30, the support heat dissipation layer 3 is disposed between the backlight side of the first flat portion 12 and the second flat portion 13.
Step S40, a protective adhesive layer is arranged at least on one side of the bending part 11 far away from the supporting heat dissipation layer 3 and one side of a part of the first flat part 12 far away from the supporting heat dissipation layer 3;
the protective adhesive layer has a first protective adhesive portion 4 and a second protective adhesive portion 5, the first protective adhesive portion 4 contacts with the polarizing layer 2, the second protective adhesive portion 5 contacts with one end of the first protective adhesive portion 4 away from the polarizing layer 2 and extends towards a direction close to the second flat portion 13, the thickness of the first protective adhesive portion 4 ranges from forty percent to sixty percent of the thickness of the polarizing layer 2, the thickness of the second protective adhesive portion 5 is less than or equal to the thickness of the first protective adhesive portion 4, and the thickness of the second protective adhesive is at least forty percent of the thickness of the polarizing layer 2.
The following describes the above steps in detail:
in step S10, a display substrate 1 may be provided, where the display substrate 1 may be the display substrate 1 described in the display device in the previous aspect, and reference may be made to the detailed description of the display substrate in the previous aspect, which is not repeated here.
In step S20, a polarizing layer 2 may be disposed on the light emitting side of the first flattening portion 12, and the polarizing layer 2 may be formed by a cross-cutting process.
In step S30, the support heat dissipation layer 3 may be disposed between the backlight side of the first flat portion 12 and the second flat portion 13.
In one embodiment of the present disclosure, the support heat dissipation layer 3 may include a first back film 31, a heat dissipation layer 32, a support layer 33, and a second back film 34. The first and second back films 31 and 34 may be disposed at the backlight side of the first flat portion 12 and the side of the second flat portion 13 near the first flat portion 12. And a support layer 33 is provided on a side of the second back film 34 away from the second flat portion 13, a heat dissipation layer 32 is provided on a side of the support layer 33 away from the second flat portion 13, and a side of the heat dissipation layer 32 away from the second flat portion 13 is bonded to a side of the first back film 31 away from the first flat portion 12. However, the order of forming the layers in the supporting heat dissipation layer 3 is not limited thereto, and may be selected and set according to actual needs, which is within the scope of the present disclosure.
In step S40, a protective adhesive layer may be disposed at least on a side of the bent portion 11 away from the supporting heat dissipation layer 3 and a side of a portion of the first flat portion 12 away from the supporting heat dissipation layer 3.
Specifically, in one embodiment of the present disclosure, the first protective adhesive portion 4 may be located at a side of the first flat portion 12 remote from the supporting heat dissipation layer 3, and the first protective adhesive portion 4 may be provided with a first protective adhesive, and the second protective adhesive portion 5 may be provided with a second protective adhesive. A first protective adhesive may be applied to a side of the first flat portion 12 remote from the supporting heat dissipation layer 3, and brought into contact with the polarizing layer 2; after the first protective adhesive is cured, a second protective adhesive is coated on one end of the first protective adhesive far away from the polarizing layer 2, and the other end of the second protective adhesive extends towards a direction close to the second flat portion 13. The fluidity of the first protective glue is smaller than that of the second protective glue, and the curing speed of the first protective glue is faster than that of the second protective glue. The first protective adhesive and the second protective adhesive may be the first protective adhesive and the second protective adhesive described in the first embodiment of the display device in the above aspect, and specific description of the first protective adhesive and the second protective adhesive in the first embodiment of the display device in the above aspect may be referred to, which is not repeated here.
In another embodiment of the present disclosure, the first protective paste portion 4 and the second protective paste portion 5 may be provided with a third protective paste 41, and the third protective paste 41 may be an ultraviolet curable paste doped with a covalent bond or an ionic bond, and the step S40 may include: providing ultraviolet curing glue; doping covalent bonds and ionic bonds in the ultraviolet curing glue to form a third protective glue 41; the third protective adhesive 41 is applied to at least one side of the bent portion 11 away from the supporting heat dissipation layer 3 and one side of a portion of the first flat portion 12 away from the supporting heat dissipation layer 3, and is in contact with the polarizing layer 2. It should be noted that the third protective adhesive 41 may be the third protective adhesive 41 described in the second embodiment of the display device in the above aspect, that is, the third protective adhesive 41 doped with a covalent bond or an ionic bond, and the detailed description of the third protective adhesive 41 with reference to the second embodiment of the display device in the above aspect will not be repeated here.
In still another embodiment of the present disclosure, the first and second protective paste portions 4 and 5 may be provided with a fourth protective paste 42, and the fourth protective paste 42 may be an ultraviolet curable paste doped with particles having anisotropic motion properties, and the above-described step S40 may include: providing ultraviolet curing glue; doping particles having anisotropic motion properties in the uv curable glue to form the fourth protective glue 42; the fourth protective adhesive 42 is applied to at least one side of the bending portion 11 away from the supporting heat dissipation layer 3 and one side of a portion of the first flat portion 12 away from the supporting heat dissipation layer 3, and is in contact with the polarizing layer 2. It should be noted that, the fourth protective glue 42 may be the fourth protective glue 42 described in the third embodiment of the display device in the above aspect, that is, the fourth protective glue 42 doped with particles having anisotropic motion properties, and the detailed description of the fourth protective glue 42 with reference to the third embodiment of the display device in the above aspect will not be repeated here.
In one embodiment of the present disclosure, as shown in fig. 9, the manufacturing method of the display device may further include:
step S50, an optical adhesive layer 6 is arranged on one side of the polarizing layer 2 away from the first flattening part 12;
in step S60, a cover plate 7 is disposed on one side of the optical adhesive layer 6 away from the polarizing layer 2.
Further, before forming the first back film 31 and the second back film 34, the manufacturing method of the display device may further include: the side of the display substrate 1 remote from the protective glue layer is provided with a substrate 8. When the substrate 8 is provided in the display device, the first back film 31 may be positioned on a side of the substrate 8 away from the first flat portion 12, and the second back film 34 may be positioned on a side of the substrate 8 away from the second flat portion 13.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following the general principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (8)
1. A display device, comprising:
the display substrate is provided with a bending part, a first flattening part and a second flattening part which are oppositely arranged, wherein the first flattening part and the second flattening part are connected through the bending part, the first flattening part is provided with a light emitting side and a backlight side, and the backlight side is opposite to the second flattening part;
a polarizing layer located on the light-emitting side of the first flattening portion;
a support heat dissipation layer located between the backlight side of the first flat portion and the second flat portion;
the protective adhesive layer is at least positioned on one side of the bending part far away from the supporting radiating layer and one side of part of the first flat part far away from the supporting radiating layer, the protective adhesive layer is provided with a first protective adhesive part and a second protective adhesive part, the first protective adhesive part is in contact with the polarizing layer, the second protective adhesive part is in contact with one end of the first protective adhesive part far away from the polarizing layer and extends towards the direction close to the second flat part, the thickness of the first protective adhesive part ranges from forty percent to sixty percent of the thickness of the polarizing layer, the thickness of the second protective adhesive part is smaller than or equal to the thickness of the first protective adhesive part, and the thickness of the second protective adhesive part is at least forty percent of the thickness of the polarizing layer; the first protective glue part is provided with first protective glue, and the second protective glue part is provided with second protective glue; the fluidity of the first protective glue is smaller than that of the second protective glue, and the curing speed of the first protective glue is faster than that of the second protective glue; the first protection glue part is located one side of the first flattening part away from the supporting heat dissipation layer, and the distance between the projection of one end of the first protection glue part away from the polarizing layer on the first flattening part and one end of the bending part close to the first flattening part is greater than or equal to 0.05mm.
2. The display device according to claim 1, wherein the first protective adhesive portions have the same thickness, the second protective adhesive portions have the same thickness, and the first protective adhesive portions have the same thickness as the second protective adhesive portions.
3. The display device according to claim 1, wherein the first protective paste portion and the second protective paste portion are provided with a third protective paste, which is an ultraviolet curable paste doped with covalent bonds or ionic bonds.
4. The display device according to claim 1, wherein the first protective paste portion and the second protective paste portion are provided with a fourth protective paste, which is an ultraviolet curable paste doped with particles having anisotropic motion properties.
5. The display device according to claim 1, wherein a plurality of first protrusions extending in the second direction are provided at an end of the polarizing layer near the first protective adhesive portion, the first protective adhesive portion being in contact with the plurality of first protrusions;
the second direction is a direction from the polarizing layer to the first protective adhesive part.
6. The display device of claim 5, wherein the projections of the first plurality of protrusions extending in the second direction are zigzag in shape on the display substrate.
7. The display device according to claim 1, wherein a plurality of second protrusions extending in a first direction are provided on a side of the display substrate adjacent to the protective adhesive layer, the first protective adhesive portion and the second protective adhesive portion being in contact with the second protrusions;
the first direction is a direction from the display substrate to the protective adhesive layer.
8. The display device according to claim 1, wherein the first protective paste is in contact with the second protective paste, and a plurality of third protrusions extending in a second direction are provided at an end of the first protective paste in contact with the second protective paste, the second protective paste being in contact with the plurality of third protrusions;
the second direction is a direction from the polarizing layer to the first protective adhesive part.
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| CN202111150135.2A CN113870709B (en) | 2021-09-29 | 2021-09-29 | display device |
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| CN202111150135.2A CN113870709B (en) | 2021-09-29 | 2021-09-29 | display device |
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| CN113870709B true CN113870709B (en) | 2023-08-25 |
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| CN113870709A (en) | 2021-12-31 |
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