CN113488520B - OLED display device and manufacturing method thereof - Google Patents
OLED display device and manufacturing method thereof Download PDFInfo
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- CN113488520B CN113488520B CN202110747558.6A CN202110747558A CN113488520B CN 113488520 B CN113488520 B CN 113488520B CN 202110747558 A CN202110747558 A CN 202110747558A CN 113488520 B CN113488520 B CN 113488520B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 239000010410 layer Substances 0.000 claims abstract description 135
- 239000000758 substrate Substances 0.000 claims abstract description 91
- 239000012790 adhesive layer Substances 0.000 claims abstract description 60
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 60
- 230000002708 enhancing effect Effects 0.000 claims abstract description 44
- 239000002184 metal Substances 0.000 claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims abstract description 33
- 238000005452 bending Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000004642 Polyimide Substances 0.000 claims description 13
- 229920001721 polyimide Polymers 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 description 13
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
-
- 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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The application discloses an OLED display device and a manufacturing method thereof. The OLED display device comprises a flexible OLED display panel, a first substrate, a second substrate, a buffer structure layer and a reinforcing plate; the buffer structure layer comprises a buffer layer facing the first substrate and a metal layer far away from the first substrate, wherein an attaching area is arranged at one end of the metal layer far away from the first substrate, and an adhesion enhancing part is arranged in the attaching area; the upper surface and the lower surface of the reinforcing plate are provided with adhesive layers, the upper surface of the reinforcing plate is attached to the attaching area, and the bending area of the flexible OLED display panel is bent so that the second substrate is attached to the lower surface of the reinforcing plate. The buffer structure layer is firmly attached to the upper surface of the reinforcing plate through the viscosity enhancing part, so that the problem that the reinforcing plate body is taken away due to low viscosity of the reinforcing plate and the buffer structure layer when the release film on the reinforcing plate is torn off in the process of manufacturing the OLED display device can be avoided.
Description
Technical Field
The application relates to the technical field of display, in particular to an OLED display device and a manufacturing method thereof.
Background
With the development of communication technology, electronic devices such as smartphones are becoming more popular. In order to achieve the narrow-edge effect, a side or bottom binding structure is generally adopted in the mobile phone product, and the bottom binding structure can achieve electrical connection of the upper substrate and the lower substrate.
The existing display device can be provided with a buffer structure layer for buffering stress, and a reinforcing plate is arranged for supporting a substrate, so that the flexible circuit board is guaranteed to be in an arc shape after being bent. The contact surface of the buffer structure layer and the reinforcing plate is a metal layer, the dyne value of the metal layer is small, and the buffer structure layer and the reinforcing plate are of a frosted structure, and the adhesive force between the adhesive layer on the reinforcing plate and the metal layer is poor.
When manufacturing a display device, the problem that the release film on the reinforcing plate takes away the reinforcing plate body often occurs when the release film is torn off.
Disclosure of Invention
The application aims to provide an OLED display device and a manufacturing method thereof, which are used for solving the technical problem that a reinforcing plate body is taken away when a release film on the reinforcing plate is torn off when an additional reinforcing plate is attached in the process of manufacturing the display device in the prior art.
In order to achieve the above object, in one embodiment of the present application, an OLED display device includes a flexible OLED display panel, a first substrate, a second substrate, a buffer structure layer, and a stiffener; specifically, the flexible OLED display panel is sequentially divided into a display area, a bending area and a circuit area; the first substrate is arranged on the lower surface of the display area of the flexible OLED display panel; the second substrate is arranged on the lower surface of the circuit area of the flexible OLED display panel and is arranged at intervals with the first substrate; the buffer structure layer is attached to the lower surface of the first substrate; the buffer structure layer comprises a buffer layer facing the first substrate and a metal layer far away from the first substrate, wherein an attaching area is arranged at one end of the metal layer far away from the first substrate, and an adhesion enhancing part is arranged in the attaching area; the upper surface and the lower surface of the reinforcing plate are provided with adhesive layers, the upper surface of the reinforcing plate is attached to the attaching area, and the bending area of the flexible OLED display panel is bent so that the second substrate is attached to the lower surface of the reinforcing plate.
In an OLED display device according to an embodiment of the present application, the adhesion enhancing portion is a convex-concave structure continuously disposed in the attachment area.
In an embodiment of the application, the adhesion enhancing portion is a plurality of grooves disposed in the attaching region at intervals.
In an OLED display device according to an embodiment of the present application, each of the grooves is elongated; all the grooves are arranged in parallel at equal intervals.
In an embodiment of the application, the metal layer is a copper foil layer.
In an OLED display device according to an embodiment of the present application, the reinforcing plate further includes a body portion; the viscose layer comprises a first glue layer and a second glue layer, wherein the first glue layer is used for being correspondingly attached and connected with the viscosity enhancing part, the second glue layer is used for being correspondingly attached and connected with the second substrate, and the viscosity of the second glue layer is smaller than that of the first glue layer.
In an embodiment of the application, the buffer structure layer further includes a polyimide layer, a pressure-sensitive adhesive layer, and a mesh adhesive layer; the polyimide layer is arranged between the buffer layer and the metal layer; the pressure sensitive adhesive layer is arranged between the polyimide layer and the buffer layer; the grid glue layer is arranged on the buffer layer, wherein the buffer layer is a foam layer.
The application also provides a manufacturing method of the OLED display device, which comprises the following steps:
setting a first substrate and a second substrate, wherein the first substrate is arranged on the lower surface of a display area of a flexible OLED display panel, and the second substrate is arranged on the lower surface of a circuit area of the flexible OLED display panel, and the flexible OLED display surface further comprises a bending area arranged between the display area and the circuit area;
a buffer structure layer is attached to the lower surface of the first substrate, wherein the buffer structure layer comprises a buffer layer facing the first substrate and a metal layer far away from the first substrate, an attaching area is arranged at one end of the metal layer far away from the first substrate, and an adhesion enhancing part is arranged in the attaching area;
attaching a reinforcing plate, wherein the reinforcing plate comprises a first release film, a first adhesive layer, a body part, a second adhesive layer and a second release film which are sequentially laminated, and the attaching reinforcing plate comprises the steps of correspondingly attaching and connecting the first adhesive layer and the viscosity reinforcing part after tearing off the first release film; and
and attaching a second substrate, namely tearing the second release film, bending the bending region of the flexible OLED display panel, and correspondingly attaching the second substrate to the second adhesive layer.
In the method for manufacturing an OLED display device according to an embodiment of the present application, the adhesion enhancing portion is a plurality of grooves disposed in the attachment area at intervals, wherein the plurality of grooves are formed by pressing the attachment area of the metal layer with a pressing head, the pressing head is provided with a plurality of protruding strips, a cross section of each protruding strip is in a circular arc shape, and a height of each protruding strip is 4um to 5um.
In an embodiment of the present application, the second adhesive layer has a lower viscosity than the first adhesive layer.
The application has the beneficial effects that the OLED display device and the manufacturing method thereof are provided, and the adhesion enhancing part is arranged in the attaching area of one end of the buffer structure layer far away from the metal layer of the first substrate; the buffer structure layer is firmly attached to the upper surface of the reinforcing plate through the viscosity enhancing part, so that the problem that the reinforcing plate body is taken away due to low viscosity of the reinforcing plate and the buffer structure layer when the release film on the reinforcing plate is torn away in the process of manufacturing the OLED display device can be avoided.
Drawings
The technical solution and other advantageous effects of the present application will be made apparent by the following detailed description of the specific embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic cross-sectional structure of an OLED display device according to an embodiment of the application.
Fig. 2 is a schematic plan view of a buffer structure layer of a flexible OLED display panel according to an embodiment of the application.
Fig. 3 is a schematic structural view of the reinforcing plate before the release film is peeled off in the embodiment of the application.
Fig. 4 is a flowchart of a method for manufacturing an OLED display device according to an embodiment of the application.
Fig. 5 is a schematic diagram of manufacturing the groove formed by pressing the attachment area of the metal layer by the pressing head in the embodiment of the application.
The components in the figure are identified as follows:
a flexible OLED display panel 1, a first substrate 2, a second substrate 3,
buffer structure layer 4, reinforcing plate 5, ram 7,
flexible circuit board 11, optical cement 12, metal layer 41,
polyimide layer 42, pressure sensitive adhesive layer 43, buffer layer 44,
a grid glue layer 45, an adhesive layer 51, a body portion 52,
the first release film 61, the second release film 62, the convex strips 71,
OLED display device 100, display area 101, inflection area 102,
the circuit area 103, the attaching area 401, the adhesion enhancing part 411,
groove 412, first glue layer 511, second glue layer 512.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Referring to fig. 1 and 2, an OLED display device 100 according to an embodiment of the present application includes a flexible OLED display panel 1, a first substrate 2, a second substrate 3, a buffer structure layer 4, and a stiffener 5.
Specifically, the flexible OLED display panel 1 is sequentially divided into a display area 101, a bending area 102 and a circuit area 103; the upper surface of the flexible OLED display panel 1 in the display area 101 is used for displaying images, and the first substrate 2 is disposed on the lower surface of the display area 101 of the flexible OLED display panel 1; the lower surface of the flexible OLED display panel 1 in the circuit area 103 is connected with the second substrate 3, and the second substrate 3 is disposed on the lower surface of the circuit area 103 of the flexible OLED display panel 1 and spaced from the first substrate 2; preferably, the thicknesses of the first substrate 2 and the second substrate 3 are equal, so that the first substrate 2 and the second substrate 3 can be electrically connected through one side of the flexible OLED display panel 1. Specifically, the flexible OLED display panel 1 includes a flexible circuit board 11 and an optical adhesive 12, and the first substrate 2 and the second substrate 3 are both disposed on the same side surface of the flexible circuit board 11 in a binding manner. The flexible circuit board 11 is bent at the bending region 102, so that the second substrate 3 and the first substrate 2 are correspondingly arranged, thereby enhancing structural stability, and the double-sided display function can be realized in other embodiments.
In particular, the term "flexible" of the flexible OLED display panel 1 or the flexible circuit board 11 means that a 180 degree bend can be made as shown in fig. 1. The material of the flexible circuit board 11 is not limited herein, and may be Polyimide (PI) or ultra-thin flexible glass, etc., and the flexible circuit board 11 is provided with circuit traces such as pixel circuits, and OLED display pixels. The OLED display pixels may be disposed in the display area 101 or the circuit area 103, or in both the display area 101 and the circuit area 103. Circuit traces may be disposed in the inflection region 102. Referring to fig. 1 and 2, in order to enhance the structural stability of the flexible OLED display panel 1 after bending, the buffer structure layer 4 and the reinforcing plate 5 are disposed between the first substrate 2 and the second substrate 3, so as to be supported between the first substrate 2 and the second substrate 3. The buffer structure layer 4 is attached to the lower surface of the first substrate 2; the buffer structure layer 4 includes a buffer layer 44 facing the first substrate 2 and a metal layer 41 far away from the first substrate 2, wherein an attachment area 401 is provided at one end of the metal layer 41 far away from the first substrate 2, and an adhesion enhancing portion 411 is provided in the attachment area 401; the upper and lower surfaces of the reinforcing plate 5 have adhesive layers 51, the upper surface of the reinforcing plate 5 is attached to the attaching region 401, and the bending region 102 of the flexible OLED display panel 1 is bent 180 degrees so that the second substrate 3 is attached to the lower surface of the reinforcing plate 5.
In the embodiment, the adhesion enhancing part 411 is arranged in the attaching area 401 at one end of the buffer structure layer 4 far away from the metal layer 41 of the first substrate 2; the buffer structure layer 4 is firmly attached to the upper surface of the reinforcing plate 5 through the adhesion enhancing portion 411, so that the problem that the body of the reinforcing plate 5 is taken away due to low viscosity of the reinforcing plate 5 and the buffer structure layer 4 when the release film on the reinforcing plate 5 is torn off in the process of manufacturing the OLED display device 100 can be avoided.
In more detail, referring to fig. 1, the buffer structure layer 4 further includes a polyimide layer 42, a pressure-sensitive adhesive layer 43, and a mesh adhesive layer 45; the polyimide layer 42 is arranged between the buffer layer 44 and the metal layer 41, and has a thickness of 50+/-5 um; the pressure sensitive adhesive layer 43 is arranged between the polyimide layer 42 and the buffer layer 44, and has a thickness of 5-15um; the grid glue layer 45 is arranged on the buffer layer 44, and the thickness is 30-50um; the buffer layer 44 is a foam layer with a thickness of 80-120um. That is, the buffer structure layer 4 includes a metal layer 41, a polyimide layer 42, a pressure sensitive adhesive layer 43, a buffer layer 44, and a mesh adhesive layer 45, which are laminated in this order from the reinforcing plate 5 to the first substrate 2 side. Wherein the buffer structure layer 4 may not be provided with the polyimide layer 42. The metal layer 41 is a copper foil layer or other metal foil layer. The application adopts the grid glue layer 45, and the adhesiveness between the buffer layer 44 of the buffer structure layer 4 and the first substrate 2 can be increased through the grid glue layer 45.
Referring to fig. 1, in this embodiment, the reinforcing plate 5 further includes a body 52; the adhesive layer 51 includes a first adhesive layer 511 and a second adhesive layer 512, the first adhesive layer 511 is configured to be correspondingly attached to the adhesion enhancing portion 411, and the second adhesive layer 512 is configured to be correspondingly attached to the second substrate 3, wherein the adhesion of the second adhesive layer 512 is less than that of the first adhesive layer 511.
Referring to fig. 3, in manufacturing the OLED display device 100, the reinforcing plate 5 includes a first release film 61, a first adhesive layer 511, a body 52, a second adhesive layer 512 and a second release film 62 sequentially stacked; after the first release film 61 is torn off, the first adhesive layer 511 and the adhesion enhancing portion 411 are correspondingly attached and connected; and tearing off the second release film 62, and bending the bending region 102 of the flexible OLED display panel 1 to correspondingly attach and connect the second substrate 3 to the second adhesive layer 512. The second adhesive layer 512 is less than the first adhesive layer 511 in viscosity, so that when the second release film 62 is torn off, the body portion 52 of the reinforcing plate 5 connected to the first adhesive layer 511 is not separated from the buffer structure layer 4, and the body portion 52 of the reinforcing plate 5 is not carried up by the second release film 62.
Referring to fig. 1 and 2, in the present embodiment, in order to enhance the adhesion between the position of the adhesion enhancing portion 411 and the first adhesive layer 511, the adhesion enhancing portion 411 is configured to have a convex-concave structure (not shown) continuously disposed in the attachment area 401, so that the adhesion area between the adhesion enhancing portion 411 and the first adhesive layer 511 can be increased. Alternatively, the adhesion enhancing part 411 may be formed as a plurality of grooves 412 formed in the attaching region 401 at intervals, and the adhesion area between the adhesion enhancing part 411 and the first adhesive layer 511 may be increased. In other embodiments, the adhesion enhancing part 411 may be provided in a zigzag structure or a wave structure, so as to increase the adhesion area between the adhesion enhancing part 411 and the first adhesive layer 511.
In this embodiment, the groove 412 is preferably elongated; all of the grooves 412 are arranged in parallel at equal intervals from each other. The recess 412 of this configuration is convenient to manufacture.
Referring to fig. 4, the present application further provides a method for manufacturing an OLED display device 100, which includes the following steps S1-S4:
s1, arranging a first substrate and a second substrate, namely arranging a first substrate 2 on the lower surface of a display area 101 of a flexible OLED display panel 1, and arranging a second substrate 3 on the lower surface of a circuit area 103 of the flexible OLED display panel 1, wherein the flexible OLED display surface further comprises a bending area 102 arranged between the display area 101 and the circuit area 103;
s2, a buffer structure layer is arranged, a buffer structure layer 4 is attached to the lower surface of the first substrate 2, wherein the buffer structure layer 4 comprises a buffer layer 44 facing the first substrate 2 and a metal layer 41 far away from the first substrate 2, an attaching area 401 is arranged at one end of the metal layer 41 far away from the first substrate 2, and an adhesion enhancing part 411 is arranged in the attaching area 401;
s3, attaching a reinforcing plate, wherein the reinforcing plate 5 comprises a first release film 61, a first adhesive layer 511, a body part 52, a second adhesive layer 512 and a second release film 62 which are sequentially laminated, and the attaching the reinforcing plate 5 comprises the steps of correspondingly attaching and connecting the first adhesive layer 511 and the viscosity enhancing part 411 after tearing off the first release film 61; and
s4, attaching the second substrate, namely tearing off the second release film 62, bending the bending region 102 of the flexible OLED display panel 1, and correspondingly attaching and connecting the second substrate 3 to the second adhesive layer 512.
Referring to fig. 5, in the present embodiment, the adhesion enhancing portion 411 is a plurality of grooves 412 disposed in the attaching region at intervals, wherein the plurality of grooves 412 are formed by pressing the attaching region of the metal layer 41 with a pressing head 7, the pressing head is provided with a plurality of protruding strips 71, each protruding strip 71 has a circular arc-shaped cross section, and the height of the protruding strip 71 is 4um-5um. The height of the ridge is the depth of the groove 412 formed. Preferably, the protruding strip 71 and the groove 412 are elongated; all the grooves 412 are arranged in parallel at equal intervals, and the grooves 412 with the structure of the raised strips 71 are convenient to manufacture.
In this embodiment, in order to enhance the adhesion between the position of the adhesion enhancing part 411 and the first adhesive layer 511, the adhesion enhancing part 411 is provided with a convex-concave structure continuously provided in the attachment area, so that the adhesion area between the adhesion enhancing part 411 and the first adhesive layer 511 can be increased. Alternatively, the adhesion enhancing parts 411 may be formed as grooves 412 formed in the attaching region at intervals, and the adhesion area between the adhesion enhancing parts 411 and the first adhesive layer 511 may be increased. In other embodiments, the adhesion enhancing part 411 may be provided in a zigzag structure or a wave structure, so as to increase the adhesion area between the adhesion enhancing part 411 and the first adhesive layer 511.
In this embodiment, the second adhesive layer 512 has a smaller viscosity than the first adhesive layer 511, so that the body portion 52 of the reinforcing plate 5 connected to the first adhesive layer 511 is not separated from the buffer structure layer 4 and is not carried up by the second release film 62 when the second release film 62 is peeled off.
The application has the beneficial effects that the OLED display device and the manufacturing method thereof are provided, and the adhesion enhancing part is arranged in the attaching area of one end of the buffer structure layer far away from the metal layer of the first substrate; the buffer structure layer is firmly attached to the upper surface of the reinforcing plate through the viscosity enhancing part, so that the problem that the reinforcing plate body is taken away due to low viscosity of the reinforcing plate and the buffer structure layer when the release film on the reinforcing plate is torn away in the process of manufacturing the OLED display device can be avoided.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The foregoing has described in detail an electronic device provided by embodiments of the present application, and specific examples have been applied to illustrate the principles and embodiments of the present application, where the foregoing examples are only for aiding in understanding of the technical solution and core idea of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (7)
1. An OLED display device, comprising:
the flexible OLED display panel is divided into a display area, a bending area and a circuit area in sequence;
the first substrate is arranged on the lower surface of the display area of the flexible OLED display panel;
the second substrate is arranged on the lower surface of the circuit area of the flexible OLED display panel and is arranged at intervals with the first substrate;
the buffer structure layer is attached to the lower surface of the first substrate; the buffer structure layer comprises a buffer layer facing the first substrate and a metal layer far away from the first substrate, wherein an attaching area is arranged at one end of the metal layer far away from the first substrate, an adhesion enhancing part is arranged in the attaching area, and the adhesion enhancing part is a plurality of grooves arranged in the attaching area at intervals; and
the upper surface and the lower surface of the reinforcing plate are provided with adhesive layers, the upper surface of the reinforcing plate is attached to the attaching area, and the bending area of the flexible OLED display panel is bent to enable the second substrate to be attached to the lower surface of the reinforcing plate;
the reinforcing plate comprises a first release film, a first adhesive layer, a body part, a second adhesive layer and a second release film which are sequentially laminated, wherein the adhesive layer comprises the first adhesive layer, is used for being correspondingly attached and connected with the adhesion enhancing part, and the second adhesive layer is used for being correspondingly attached and connected with the second substrate, the adhesion of the second adhesive layer is smaller than that of the first adhesive layer, so that the body part of the reinforcing plate connected with the first adhesive layer is not separated from the buffer structure layer when the second release film is torn off.
2. The OLED display device according to claim 1, wherein the adhesion enhancing part is a convex-concave structure continuously provided in the attachment region.
3. The OLED display device of claim 1, wherein each of the grooves is elongated; all the grooves are arranged in parallel at equal intervals.
4. The OLED display device of claim 1, wherein the metal layer is a copper foil layer.
5. The OLED display device of claim 1, wherein the buffer structure layer further comprises:
the polyimide layer is arranged between the buffer layer and the metal layer;
the pressure sensing adhesive layer is arranged between the polyimide layer and the buffer layer; and
and the grid adhesive layer is arranged on the buffer layer, wherein the buffer layer is a foam layer.
6. A method of fabricating an OLED display device, comprising the steps of:
setting a first substrate and a second substrate, wherein the first substrate is arranged on the lower surface of a display area of a flexible OLED display panel, and the second substrate is arranged on the lower surface of a circuit area of the flexible OLED display panel, and the flexible OLED display surface further comprises a bending area arranged between the display area and the circuit area;
a buffer structure layer is attached to the lower surface of the first substrate, wherein the buffer structure layer comprises a buffer layer facing the first substrate and a metal layer far away from the first substrate, an attaching area is arranged at one end of the metal layer far away from the first substrate, an adhesion enhancing part is arranged in the attaching area, and the adhesion enhancing part is a plurality of grooves arranged in the attaching area at intervals;
attaching a reinforcing plate, wherein the reinforcing plate comprises a first release film, a first adhesive layer, a body part, a second adhesive layer and a second release film which are sequentially laminated, and the viscosity of the second adhesive layer is smaller than that of the first adhesive layer; the step of attaching the reinforcing plate comprises the step of correspondingly attaching and connecting the first adhesive layer and the viscosity enhancing part after tearing off the first release film; and
and attaching a second substrate, namely tearing the second release film, bending the bending region of the flexible OLED display panel, and correspondingly attaching the second substrate to the second adhesive layer.
7. The method according to claim 6, wherein the adhesion enhancing portion is a plurality of grooves formed in the attaching region at intervals, the plurality of grooves are formed by pressing the attaching region of the metal layer by a pressing head, the pressing head is provided with a plurality of protruding strips, the cross section of each protruding strip is in a circular arc shape, and the height of each protruding strip is 4um-5um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110747558.6A CN113488520B (en) | 2021-07-02 | 2021-07-02 | OLED display device and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110747558.6A CN113488520B (en) | 2021-07-02 | 2021-07-02 | OLED display device and manufacturing method thereof |
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| CN113488520A CN113488520A (en) | 2021-10-08 |
| CN113488520B true CN113488520B (en) | 2023-11-03 |
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| CN114863826B (en) * | 2022-04-12 | 2023-06-27 | 武汉华星光电半导体显示技术有限公司 | Display screen and manufacturing method thereof |
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| US10229963B1 (en) * | 2017-11-01 | 2019-03-12 | Google Llc | Display device including support structure for bending |
| CN108735103B (en) * | 2018-05-31 | 2019-09-17 | 京东方科技集团股份有限公司 | A kind of display backboard |
| CN108682306A (en) * | 2018-07-18 | 2018-10-19 | 昆山国显光电有限公司 | Flexible display screen and display device |
| KR20200055481A (en) * | 2018-11-13 | 2020-05-21 | 엘지디스플레이 주식회사 | Flexible display apparatus |
| CN112863346B (en) * | 2021-01-14 | 2022-07-12 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
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