CN111768696A - Folding display panel and preparation method thereof - Google Patents
Folding display panel and preparation method thereof Download PDFInfo
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- CN111768696A CN111768696A CN202010533048.4A CN202010533048A CN111768696A CN 111768696 A CN111768696 A CN 111768696A CN 202010533048 A CN202010533048 A CN 202010533048A CN 111768696 A CN111768696 A CN 111768696A
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- layer
- substrate
- display panel
- touch electrode
- protective
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
Abstract
The invention discloses a folding display panel and a preparation method thereof, wherein the folding display panel comprises the following components: a first substrate; a second substrate disposed opposite to the first substrate; the display layer is arranged on one side surface of the first substrate; the composite functional layer and the optical adhesive layer are arranged between the display layer and the second substrate; the composite functional layer comprises at least one protective layer and a touch electrode layer, and the touch electrode layer is arranged on the surface of one side of the protective layer. Compared with the existing folding display panel, the polarizing layer and the touch layer are integrated into the composite functional layer in the folding display panel, and the touch electrode layer is arranged on the surface of the protective layer, so that a laminated optical adhesive layer is reduced, and the hardness of the upper layer of the laminated structure is improved; the integral stacking design thickness is reduced, and the reduction of the bending radius is facilitated; the laminating process is reduced, and the process flow is simplified.
Description
Technical Field
The invention relates to the technical field of display, in particular to a folding display panel and a preparation method of the folding display panel.
Background
With the sale of the folding mobile phone, the Samsung Galaxy fold and Huacheng mate X, the folding mobile phone quickly becomes a fashion trend and enters the visual field of the public. When the mobile phone is folded, the mechanism of the mobile phone needs to be continuously integrated, and the laminated layer is thinner and thinner.
As shown in fig. 1, fig. 1 is a functional layer diagram of a foldable display panel in the prior art. The foldable display Panel includes a Back Panel 101 (BP), a display layer 102, an Optical Clear Adhesive (OCA) layer 103, a touch functional layer 104, a polarization function (POL) layer 105, a second optical Adhesive layer 106, and a Cover plate (Cover Windows) layer 107. The touch layer 104 includes a substrate film 1041 and a nano silver wire (AgNW) layer 1042, and the polarizer layer 105 includes a Pressure Sensitive Adhesive (PSA) layer 1051, a first Tri-cellulose Acetate (TCA) layer 1052, a polyvinyl alcohol (PVA) layer 1053, and a second cellulose triacetate (PVA) layer 1054. Due to the fact that the thickness of the folding display panel is too large, the number of glue layers is too large, the preparation process is complicated, the bending radius is too large, the hardness of the upper layer of the laminated functional layer is insufficient, and the manufacturing process is complex.
In summary, the conventional foldable display panel has the technical problems of overlarge bending radius, insufficient hardness of the upper layer of the laminated structure and complex manufacturing process due to overlarge thickness, too many glue layers and complicated preparation process.
Disclosure of Invention
The embodiment of the invention provides a folding display panel and a preparation method of the folding display panel, which are used for solving the technical problems of overlarge bending radius, insufficient upper layer hardness of a laminated structure and complex manufacturing process of the existing folding display panel due to overlarge thickness, too many glue layers and complicated preparation process.
To solve the above problem, in a first aspect, the present invention provides a foldable display panel, comprising:
a first substrate;
a second substrate disposed opposite to the first substrate;
the display layer is arranged on one side surface of the first substrate;
the composite functional layer and the optical adhesive layer are arranged between the display layer and the second substrate;
the composite functional layer comprises at least one protective layer and a touch electrode layer, and the touch electrode layer is arranged on the surface of one side of the protective layer.
In some embodiments of the present invention, the composite functional layer further includes a polarizing layer, and the protective layer is disposed on one or both surfaces of the polarizing layer.
In some embodiments of the invention, a surface of the touch electrode layer, which is away from the protective layer, is connected to the optical adhesive layer.
In some embodiments of the invention, a side of the optical adhesive layer away from the touch electrode layer is connected to the second substrate or the display layer.
In some embodiments of the present invention, the composite functional layer further comprises a pressure sensitive adhesive attached to the display layer or the second substrate.
In some embodiments of the present invention, the touch electrode layer is at least partially embedded in a surface of the protection layer on a side away from the polarizing layer.
In some embodiments of the present invention, the material of the touch electrode layer is indium tin oxide, graphene, a metal grid, or a nano silver wire.
In some embodiments of the present invention, the material of the polarizing layer is polyvinyl alcohol, and the material of the protective layer is polycarbonate, cyclic olefin polymer, or cellulose triacetate.
In a second aspect, the present invention provides a method for manufacturing a foldable display panel, the method being used for manufacturing the foldable display panel according to any one of the first aspect, and comprising the steps of:
providing a first substrate, and preparing a display layer on the first substrate;
preparing a composite functional layer and an optical adhesive layer on the display layer;
preparing a second substrate on the composite functional layer or the optical adhesive layer;
the composite functional layer comprises at least one protective layer and a touch electrode layer, and the touch electrode layer is arranged on the surface of one side of the protective layer.
In some embodiments of the present invention, when the protective layers are two, preparing the composite functional layer comprises:
providing a polarizing layer, respectively preparing a first protective layer and a second protective layer on the surfaces of both sides of the polarizing layer,
preparing a pressure-sensitive adhesive layer on the surface of one side, away from the polarizing layer, of the first protective layer;
and preparing a touch electrode layer on the surface of one side of the second protective layer, which is far away from the polarizing layer.
Compared with the existing folding display panel, the polarizing layer and the touch layer are integrated into the composite functional layer in the folding display panel, and the touch electrode layer is arranged on the surface of the protective layer, so that a laminated optical adhesive layer is reduced, and the hardness of the upper layer of the laminated structure is improved; the integral stacking design thickness is reduced, and the reduction of the bending radius is facilitated; the laminating process is reduced, and the process flow is simplified.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a functional layer diagram of a foldable display panel in the prior art;
FIG. 2 is a schematic structural diagram of a foldable display panel according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a composite functional layer according to an embodiment of the present invention;
FIG. 4 is a flow chart of a method for manufacturing a foldable display panel according to an embodiment of the present invention; and
FIG. 5 is a flow chart of a method of making a composite functional layer in one embodiment of the present invention
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the panels or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The prior folding display panel has the technical problems of overlarge bending radius, insufficient upper layer hardness of a laminated structure and complex manufacturing process flow due to overlarge thickness, too many glue layers and complicated preparation process.
Accordingly, embodiments of the present invention provide a foldable display panel and a method for manufacturing the foldable display panel, which are described in detail below.
First, an embodiment of the invention provides a foldable display panel, as shown in fig. 2, and fig. 2 is a schematic structural diagram of the foldable display panel in an embodiment of the invention. The folding display panel includes: a first substrate 201; a second substrate 205 disposed opposite to the first substrate 201; a display layer 202 disposed on a side surface of the first substrate 201; the composite functional layer 203 and the optical adhesive layer 204 are arranged between the display layer 202 and the second substrate 204; the composite functional layer 203 includes at least one protective layer 2034 and a touch electrode layer 2035, and the touch electrode layer 2035 is disposed on a surface of one side of the protective layer 2034.
Compared with the existing folding display panel, the embodiment of the invention integrates the polarizing layer and the touch layer into the composite functional layer 203 in the folding display panel, and the touch electrode layer 2035 is arranged on the surface of the protective layer 2034, so that a laminated optical adhesive layer is reduced, and the hardness of the upper layer of the laminated structure is improved; the integral stacking design thickness is reduced, and the reduction of the bending radius is facilitated; the laminating process is reduced, and the process flow is simplified.
In the embodiment of the present invention, as shown in fig. 3, fig. 3 is a schematic structural diagram of a composite functional layer in an embodiment of the present invention. The composite functional layer 203 further includes a polarizing layer 2033, and the protective layer 2034 is disposed on one or both surfaces of the polarizing layer 2033. When there is only one of the protective layers, the protective layer 2034; when the protective layer is two, the protective layer includes a first protective layer 2032 and a second protective layer 2034. The polarizing layer 2033 has a polarizing property to change incident light into light having a certain vibration direction, and the first protective layer 2032 and the second protective layer 2034 have good light transmittance, water resistance, and certain mechanical strength.
The composite functional layer 203 includes a touch electrode layer 2035, and a surface of the touch electrode layer 2035 on a side away from the protective layer 2034 is connected to the optical adhesive layer 204. The touch electrode layer 2035 has good conductivity, light transmittance and bending property at the same time.
The side of the optical adhesive layer 204 away from the touch electrode layer 2035 is connected to the second substrate 205 or the display layer 202. Correspondingly, the composite functional layer 203 further includes a pressure sensitive adhesive layer 2031, and the pressure sensitive adhesive layer 2031 is connected to the display layer 202 or the second substrate 205. That is, the positions of the optical adhesive layer 204 and the pressure sensitive adhesive layer 2031 can be interchanged, and the position of the touch electrode layer 2035 is changed accordingly.
In addition to the above embodiments of the present invention, when there are two protective layers, in the composite functional layer 203, the first substrate 201, the display layer 202, the pressure sensitive adhesive layer 2031, the first protective layer 2032, the polarizing layer 2033, the second protective layer 2034, the touch electrode layer 2035, the optical adhesive layer 204, and the second substrate 205 are sequentially stacked. The display layer 202 is bonded to the first protective layer 2032 through the pressure sensitive adhesive layer 2031, and the touch electrode layer 2035 is bonded to the second substrate 205 through the optical adhesive layer 204.
In another embodiment of the present invention, when there are two protective layers, in the composite functional layer 203, the first substrate 201, the display layer 202, the optical adhesive layer 204, the touch electrode layer 2035, the first protective layer 2032, the polarizing layer 2033, the second protective layer 2034, the pressure sensitive adhesive layer 2031, and the second substrate 205 are sequentially stacked. The display layer 202 is bonded to the touch electrode layer 2035 through the optical adhesive layer 204, and the second protective layer 2034 is bonded to the second substrate 205 through the pressure sensitive adhesive layer 2031.
The touch electrode layer 2035 is at least partially embedded in a surface of the protection layer 2034 on a side away from the polarization layer 2033. Compared with the conventional folding display panel, the touch electrode layer 2035 is embedded into one side surface of the protective layer 2034, so that the film substrate of the touch electrode layer 2035 is omitted, the overlapping thickness of the touch electrode layer 2035 and the protective layer 2034 is increased, and the reduction and thinning of the lamination structure are facilitated.
Preferably, the material of the polarizing layer 2033 is polyvinyl alcohol. The polyvinyl alcohol may adsorb dichroic molecules, and the polarizing layer 2033 is formed by dyeing, stretching, dehydrating, and drying the polyvinyl alcohol substrate with an organic dye having dichroism.
Preferably, the touch electrode layer 2035 is made of indium tin oxide, graphene, metal mesh or nano silver wire. More preferably, the touch electrode layer 2035 is a nano silver wire layer, and a transparent nano silver wire touch electrode is produced by a coating process.
Preferably, the first protective layer 2032 and the second protective layer 2034 are made of Polycarbonate (PS), Cyclic Olefin Polymer (COP), or Triacetyl Cellulose (TAC). In the embodiment of the present invention, the thicknesses of the first protective layer 2032 and the second protective layer 2034 are equal to each other and are both greater than the thickness of the polarization layer 2033, so as to prevent water vapor from eroding the polarization layer 2033 from the side.
In order to better manufacture the foldable display panel in the embodiment of the present invention, on the basis of the foldable display panel, the embodiment of the present invention further provides a manufacturing method of the foldable display panel, and the manufacturing method is used for manufacturing the foldable display panel as described in the above embodiment.
As shown in fig. 4, fig. 4 is a flowchart of a method for manufacturing a foldable display panel according to an embodiment of the invention. The preparation method comprises the following steps:
s1, providing a first substrate 201, and preparing a display layer 202 on the first substrate 201;
s2, preparing a composite functional layer 203 and an optical adhesive layer 204 on the display layer 202;
s3, preparing a second substrate 205 on the composite functional layer 203 or the optical adhesive layer 204;
the composite functional layer 203 includes at least one protective layer 2034 and a touch electrode layer 2035, and the touch electrode layer 2035 is disposed on a surface of one side of the protective layer 2034.
As shown in fig. 5, fig. 5 is a flow chart of a method for preparing a composite functional layer according to an embodiment of the present invention. When there are two protective layers, the preparation method comprises:
s201, providing a polarizing layer 2033, preparing a first protecting layer 2032 and a second protecting layer 2034 on the two side surfaces of the polarizing layer respectively,
s202, preparing a pressure sensitive adhesive layer 2031 on a surface of the first protective layer 2032 away from the polarizing layer 2033;
s203, preparing a touch electrode layer 2035 on a surface of the second protective layer 2034 far away from the polarizing layer 2033.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed descriptions of other embodiments, and are not described herein again. In a specific implementation, each of the above units, functional layers, or operations may be implemented as an independent entity, or may be implemented as one or several entities by any combination.
The above embodiments of the present invention are described in detail, and the principle and the implementation of the present invention are explained by applying specific embodiments, and the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A foldable display panel, comprising:
a first substrate;
a second substrate disposed opposite to the first substrate;
the display layer is arranged on one side surface of the first substrate;
the composite functional layer and the optical adhesive layer are arranged between the display layer and the second substrate;
the composite functional layer comprises at least one protective layer and a touch electrode layer, and the touch electrode layer is arranged on the surface of one side of the protective layer.
2. The foldable display panel of claim 1, wherein the composite functional layer further comprises a polarizing layer, and the protective layer is disposed on one or both surfaces of the polarizing layer.
3. The foldable display panel of claim 1, wherein a surface of the touch electrode layer away from the protective layer is connected to the optical adhesive layer.
4. The foldable display panel of claim 3, wherein the side of the optical adhesive layer away from the touch electrode layer is connected to the second substrate or the display layer.
5. The folded display panel of claim 1, wherein the composite functional layer further comprises a pressure sensitive adhesive coupled to the display layer or the second substrate.
6. The foldable display panel of claim 1, wherein the touch electrode layer is at least partially embedded in a surface of the protection layer on a side away from the polarizing layer.
7. The foldable display panel of claim 1, wherein the touch electrode layer is made of indium tin oxide, graphene, metal mesh or silver nanowires.
8. The foldable display panel of claim 2, wherein the polarizing layer is made of polyvinyl alcohol and the protective layer is made of polycarbonate, cyclic olefin polymer or cellulose triacetate.
9. A preparation method of a folding display panel is characterized by comprising the following steps:
providing a first substrate, and preparing a display layer on the first substrate;
preparing a composite functional layer and an optical adhesive layer on the display layer;
preparing a second substrate on the composite functional layer or the optical adhesive layer;
the composite functional layer comprises at least one protective layer and a touch electrode layer, and the touch electrode layer is arranged on the surface of one side of the protective layer.
10. The method of claim 9, wherein when there are two protective layers, preparing a composite functional layer comprises:
providing a polarizing layer, respectively preparing a first protective layer and a second protective layer on the surfaces of both sides of the polarizing layer,
preparing a pressure-sensitive adhesive layer on the surface of one side, away from the polarizing layer, of the first protective layer;
and preparing a touch electrode layer on the surface of one side of the second protective layer, which is far away from the polarizing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010533048.4A CN111768696A (en) | 2020-06-12 | 2020-06-12 | Folding display panel and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010533048.4A CN111768696A (en) | 2020-06-12 | 2020-06-12 | Folding display panel and preparation method thereof |
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| CN111768696A true CN111768696A (en) | 2020-10-13 |
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2020
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| CN102971805A (en) * | 2010-02-27 | 2013-03-13 | 因努瓦动力有限公司 | Structures with surface-embedded additives and related manufacturing methods |
| CN105762291A (en) * | 2015-01-06 | 2016-07-13 | 延世大学校产学协力团 | Transparent electrode and manufacturing method thereof |
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Application publication date: 20201013 |