CN107545848A - Flexible cover plate and preparation method thereof, flexible OLED display - Google Patents

Abstract

The present invention provides a kind of flexible cover plate and preparation method thereof, flexible OLED display.The flexible cover plate of the present invention, including the first flexible substrates, second flexible substrates, ink layer, and hardened layer, wherein, the ink layer includes spaced first ink area and the second ink area, second flexible substrates are filled between first ink area and the second ink area, so as to eliminate the offset caused by ink layer is in the first flexible substrates, so in use, can just thinner optical cement layer be used to reach good fitting effect, and then reduce the thickness of flexible OLED display, lift its bending resistance, the fitting difficulty of flexible cover plate is also reduced simultaneously, beneficial to the raising of production yield.

Description

Flexible cover plate and manufacturing method thereof, flexible OLED display device

technical field

The invention relates to the field of display technology, in particular to a flexible cover plate, a manufacturing method thereof, and a flexible OLED display device.

Background technique

Organic Light Emitting Diode (OLED) displays have self-illumination, low driving voltage, high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, wide operating temperature range, and can realize flexible display and large It is recognized by the industry as a display device with the most potential for development due to its many advantages such as full-color display.

Compared with traditional liquid crystal displays (Liquid Crystal Display, LCD), OLED displays do not require backlights, and use very thin organic material coatings and glass substrates. When current passes through, these organic materials will emit light. In addition , its biggest advantage is that it can be made into flexible products. Different from the glass cover of the general rigid screen, the flexible OLED display uses a bendable flexible cover.

FIG. 1 is a schematic structural view of a flexible cover plate 100 in the prior art. As shown in FIG. ) 120, in addition, in order to display the display area, an opaque ink layer 130 needs to be arranged on the peripheral edge of the back of the flexible substrate 110, so that the ink layer 130 forms a display window area. The flexible substrate 110 is mainly made of polymer materials such as polyethylene terephthalate (PET) or polyimide (PI), and the thickness of the ink layer 130 is usually about 20 μm. The ink layer 130 disposed on the top has a certain thickness, which will form a certain gap inside the ink layer 130 .

2 is a schematic structural view of a flexible OLED display device in the prior art. As shown in FIG. 100, where the uppermost layer of the OLED display panel 200 is usually a polarizer layer. Since there is a gap of about 20 μm between the ink layer 130 on the flexible cover 100 and the flexible substrate 110, the thickness of the optically transparent adhesive 300 It needs to be thickened to 50-100um to ensure that the flexible cover 100 is closely attached to the polarizer layer of the OLED display panel 200 . But at the same time, the thickness of the entire flexible OLED display device will be greatly increased, which is obviously not conducive to the bending of the flexible OLED display device.

Contents of the invention

The purpose of the present invention is to provide a flexible cover, which can eliminate the gap caused by the ink layer, reduce the thickness of the flexible OLED display device, improve its bending resistance, and reduce the difficulty of laminating the flexible cover, which is beneficial to production Yield improvement.

Another object of the present invention is to provide a method for manufacturing a flexible cover, which can eliminate the gap caused by the ink layer, reduce the thickness of the flexible OLED display device, improve its bending resistance, and reduce the adhesion of the flexible cover. Combining difficulty is beneficial to the improvement of production yield.

Another object of the present invention is to provide a flexible OLED display device. Using the above-mentioned flexible cover plate can eliminate the gap caused by the ink layer, reduce the thickness of the flexible OLED display device, improve its bending resistance, and at the same time reduce the The difficulty of laminating the flexible cover is conducive to the improvement of production yield.

To achieve the above object, the present invention provides a flexible cover, comprising a first flexible substrate, a second flexible substrate and an ink layer arranged on the same side of the first flexible substrate, and another flexible substrate arranged on the first flexible substrate side hardened layer;

The ink layer includes a first ink area and a second ink area arranged at intervals, and the second flexible substrate is filled between the first ink area and the second ink area.

Optionally, the first ink zone and the second ink zone have the same thickness, and the surface of the second flexible substrate away from the first flexible substrate is flush with the surface of the ink layer away from the first flexible substrate ;

Both the thickness of the second flexible substrate and the ink layer are 10-25 μm.

Optionally, the flexible cover further includes a third flexible base covering the second flexible base and the ink layer, and the third flexible base is integrally formed with the second flexible base.

The materials of the second flexible substrate, the first flexible substrate and the third flexible substrate are the same.

The thickness of the ink layer is 10-25 μm, and the sum of the thickness of the second flexible substrate and the thickness of the third flexible substrate is 20-50 μm.

The present invention also provides a method for manufacturing a flexible cover, comprising the following steps:

Step S1, making a first flexible substrate;

Step S2, forming a second flexible substrate and an ink layer on one side of the first flexible substrate, and forming a hardened layer on the other side of the first flexible substrate; wherein the ink layer includes first inks arranged at intervals zone and a second ink zone, the second flexible substrate is filled between the first ink zone and the second ink zone.

Optionally, the specific process of forming the second flexible substrate and the ink layer in the step S2 is: first make the second flexible substrate on one side of the first flexible substrate, and then attach or print on the second flexible substrate. The periphery of the second flexible substrate forms a first ink zone and a second ink zone, and there is no space between the first ink zone and the second ink zone and the second flexible substrate;

The first ink zone and the second ink zone have the same thickness, and the surface of the second flexible substrate away from the first flexible substrate is flush with the surface of the ink layer away from the first flexible substrate;

Both the thickness of the second flexible substrate and the ink layer are 10-25 μm.

Optionally, the step S2 further includes: a step of forming a third flexible substrate covering the second flexible substrate and the ink layer,

The specific process of forming the second flexible substrate, the ink layer and the third flexible substrate is as follows: first, the first ink area and the second ink area are formed on one side of the first flexible substrate by attaching or printing, and then The same side of the first flexible substrate is integrally formed to form a second flexible substrate filled between the first ink zone and the second ink zone and a third flexible substrate covering the second flexible substrate and the ink layer;

The materials of the second flexible substrate, the first flexible substrate and the third flexible substrate are the same; the thickness of the ink layer is 10-25 μm, and the thickness of the second flexible substrate is the same as that of the third flexible substrate The sum is 20-50 μm.

The present invention also provides a flexible OLED display device, which includes the above-mentioned flexible cover, an OLED panel opposite to the flexible cover, and the flexible cover and the OLED panel. or an optical adhesive layer bonded together; wherein, the side of the flexible cover plate provided with the ink layer faces the OLED panel.

Beneficial effects of the present invention: a flexible cover plate provided by the present invention includes a first flexible substrate, a second flexible substrate, an ink layer, and a hardened layer, wherein the ink layer includes a first ink area and a second ink layer arranged at intervals. Two ink areas, the second flexible substrate is filled between the first ink area and the second ink area, thereby eliminating the gap caused by the ink layer on the first flexible substrate, so that during use, A thinner optical adhesive layer can be used to achieve a good bonding effect, thereby reducing the thickness of the flexible OLED display device, improving its bending resistance, and also reducing the difficulty of bonding the flexible cover, which is beneficial to production yield. improvement. In the manufacturing method of the flexible cover plate of the present invention, a second flexible substrate that is completely filled between the first ink area and the second ink area is formed on one side of the first flexible substrate, thereby eliminating the problem caused by the ink layer on the second ink layer. A gap caused by a flexible substrate, so that in the process of use, a thinner optical adhesive layer can be used to achieve a good bonding effect, thereby reducing the thickness of the flexible OLED display device and improving its bending resistance. At the same time, it also reduces the lamination difficulty of the flexible cover, which is beneficial to the improvement of the production yield. The flexible OLED display device of the present invention adopts the above-mentioned flexible cover plate, which can eliminate the gap caused by the ink layer, reduce the thickness of the flexible OLED display device, improve its bending resistance, and also reduce the difficulty of bonding, which is beneficial Improvement in production yield.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. However, the accompanying drawings are provided for reference and illustration only, and are not intended to limit the present invention.

Description of drawings

The technical solutions and other beneficial effects of the present invention will be apparent through the detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.

In the attached picture,

FIG. 1 is a schematic structural view of an existing flexible cover;

Fig. 2 is a schematic structural diagram of an existing flexible OLED display device;

3 is a schematic structural view of the first embodiment of the flexible cover of the present invention;

4 is a schematic structural view of a second embodiment of the flexible cover of the present invention;

Fig. 5 is a schematic flow chart of the manufacturing method of the flexible cover plate of the present invention;

Fig. 6 is a schematic diagram of step S2 of the first embodiment of the manufacturing method of the flexible cover of the present invention;

Fig. 7 is a schematic diagram of step S2 of the second embodiment of the manufacturing method of the flexible cover plate of the present invention

FIG. 8 is a schematic structural view of the flexible OLED display device of the present invention.

detailed description

In order to further illustrate the technical means adopted by the present invention and its effects, the following describes in detail in conjunction with preferred embodiments of the present invention and accompanying drawings.

The present invention first provides a flexible cover. Please refer to FIG. 3 . FIG. 3 is a schematic structural diagram of a first embodiment of the flexible cover of the present invention. In this embodiment, the flexible cover includes a first flexible base 11, A second flexible substrate 12 and an ink layer 13 arranged on the same side of the first flexible substrate 11, and a hard coating (Hard coating) 14 arranged on the other side of the first flexible substrate 11;

The ink layer 13 includes a first ink area 131 and a second ink area 132 arranged at intervals, and the second flexible substrate 12 is filled between the first ink area 131 and the second ink area 132 .

Specifically, the material of the first flexible substrate 11 is a bending-resistant material, such as polyethylene terephthalate (PET), polyimide (PI) and other materials, further, the first The material of a flexible base 11 is preferably polyimide material.

Specifically, the material of the second flexible substrate 12 is the same as that of the first flexible substrate 11 , and the material of the second flexible substrate 12 is preferably a polyimide material.

Specifically, the first ink zone 131 and the second ink zone 132 have the same thickness, the surface of the second flexible substrate 12 away from the first flexible substrate 11 and the ink layer 13 away from the first flexible substrate The surface of 11 is even.

Specifically, the thicknesses of the second flexible substrate 12 and the ink layer 13 are both 10-25 μm.

Specifically, the thickness of the first flexible substrate 11 depends on requirements, and may be selected to be 20-50 μm.

Specifically, the thickness of the hardened layer 14 is about 10 μm.

Please refer to Fig. 4, Fig. 4 is a schematic structural view of the second embodiment of the flexible cover plate of the present invention. Compared with the first embodiment, the difference between this embodiment and the first embodiment is that the flexible cover plate also includes The flexible substrate 12 and the third flexible substrate 15 of the ink layer 13 are integrally formed with the second flexible substrate 12 . The materials of the second flexible substrate 12, the first flexible substrate 11 and the third flexible substrate 15 are the same; the thickness of the ink layer 13 is 10-25 μm, and the thickness of the second flexible substrate 12 is the same as that of the first flexible substrate 12. The sum of the thicknesses of the three flexible substrates 15 is 20-50 μm.

In the flexible cover plate of the present invention, the second flexible substrate 12 completely filled between the first ink zone 131 and the second ink zone 132 is provided on one side of the first flexible substrate 11, thereby eliminating the ink layer 13 The resulting gap on the first flexible substrate 11 enables a thinner optical adhesive layer to achieve a good bonding effect during use, thereby reducing the thickness of the flexible OLED display device and improving its bending resistance It improves the folding performance, and also reduces the difficulty of laminating the flexible cover, which is beneficial to the improvement of production yield.

Based on the above-mentioned flexible cover, please refer to FIG. 5 , the present invention also provides a method for manufacturing a flexible cover. The first embodiment of the method for manufacturing a flexible cover of the present invention specifically includes the following steps:

Step S1 , making the first flexible substrate 11 .

Specifically, the thickness of the first flexible substrate 11 depends on requirements, and may be selected to be 20-50 μm.

Specifically, the material of the first flexible substrate 11 is a bending-resistant material, such as polyethylene terephthalate, polyimide and other materials. Further, the material of the first flexible substrate 11 Polyimide material is preferred.

Step S2, forming a second flexible substrate 12 and an ink layer 13 on one side of the first flexible substrate 11, and forming a hardened layer 14 on the other side of the first flexible substrate 11; wherein, the ink layer 13 includes The first ink area 131 and the second ink area 132 are arranged at intervals, and the second flexible substrate 12 is filled between the first ink area 131 and the second ink area 132 .

Specifically, the hardened layer 14 is formed by coating before forming the second flexible substrate 12 and the ink layer 13 , and the thickness of the hardened layer 14 is about 10 μm. In addition, the hardened layer 14 can also be formed after the formation of the second flexible substrate 12 or the ink layer 13 , and the production sequence can be adjusted according to actual needs.

Specifically, as shown in FIG. 6 , after forming the hardened layer 14 in the step S2, the specific process of forming the second flexible substrate 12 and the ink layer 13 is as follows: firstly, the first flexible substrate 11 is formed on one side of the first flexible substrate 11. Two flexible substrates 12, then form a first ink zone 131 and a second ink zone 132 on the periphery of the second flexible substrate 12 by attaching or printing, and the first ink zone 131 and the second ink zone There is no space between 132 and the second flexible substrate 12 .

Specifically, the first ink zone 131 and the second ink zone 132 have the same thickness, the surface of the second flexible substrate 12 away from the first flexible substrate 11 and the ink layer 13 away from the first flexible substrate The surface of 11 is even.

Specifically, the thicknesses of the second flexible substrate 12 and the ink layer 13 are both 10-25 μm.

Specifically, the material of the second flexible substrate 12 is the same as that of the first flexible substrate 11 , and the material of the second flexible substrate 12 is preferably a polyimide material.

Compared with the first embodiment, the second embodiment of the manufacturing method of the flexible cover of the present invention differs in that, as shown in FIG. 7 , the step S2 further includes: the step of the third flexible substrate 15 of the ink layer 13,

The specific process of forming the second flexible substrate 12, the ink layer 13 and the third flexible substrate 15 is as follows: first, the first ink area 131 and the second ink area 131 are formed on one side of the first flexible substrate 11 by pasting or printing. The ink zone 132 is then integrally formed on the same side of the first flexible substrate 11 to form the second flexible substrate 12 filled between the first ink zone 131 and the second ink zone 132 and cover the second flexible substrate 12 And the third flexible substrate 15 of ink layer 13.

Specifically, the materials of the second flexible substrate 12, the first flexible substrate 11 and the third flexible substrate 15 are the same; the thickness of the ink layer 13 is 10-25 μm, and the thickness of the second flexible substrate 12 is The sum of the thickness and the thickness of the third flexible substrate 15 is 20-50 μm.

The manufacturing method of the flexible cover plate of the present invention forms the second flexible substrate 12 completely filled between the first ink region 131 and the second ink region 132 on one side of the first flexible substrate 11, thereby eliminating the problem caused by the ink layer. 13 on the first flexible substrate 11, so that in the process of use, a thinner optical adhesive layer can be used to achieve a good bonding effect, thereby reducing the thickness of the flexible OLED display device and improving its durability. The bending performance also reduces the difficulty of laminating the flexible cover, which is beneficial to the improvement of production yield.

Based on the flexible cover above, the present invention also provides a flexible OLED display device, including a flexible cover 10, an OLED panel 20 disposed opposite to the flexible cover 10, and an OLED panel disposed between the flexible cover 10 and the OLED. An optical adhesive layer 30 between the panels 20 to bond the two together; wherein, the flexible cover 10 can adopt the first embodiment of the above-mentioned flexible cover, or can use the second embodiment of the above-mentioned flexible cover , its specific technical features will not be repeated here, the side of the flexible cover 10 provided with the ink layer 13 faces the OLED panel 20 .

Specifically, the OLED panel 20 includes a base substrate 21, and an OLED layer 22, an encapsulation layer 23, and a polarizer 24 sequentially arranged on the base substrate 21; wherein, the OLED panel 20 is provided with a polarizer 24 One side of the flexible cover plate 10 faces.

The flexible OLED display device of the present invention can eliminate the gap caused by the ink layer 13, and can use a thinner optical adhesive layer 30 to achieve a good bonding effect, reduce the thickness of the flexible OLED display device, and improve its durability. The bending performance also reduces the lamination difficulty of the flexible cover plate 10, which is beneficial to the improvement of the production yield.

In summary, the present invention provides a flexible cover plate, which includes a first flexible substrate, a second flexible substrate, an ink layer, and a hardened layer, wherein the ink layer includes a first ink area and a second ink area arranged at intervals. Ink area, the second flexible substrate is filled between the first ink area and the second ink area, thereby eliminating the gap caused by the ink layer on the first flexible substrate, so that during use, the A thinner optical adhesive layer can be used to achieve a good bonding effect, thereby reducing the thickness of the flexible OLED display device, improving its bending resistance, and also reducing the difficulty of bonding the flexible cover, which is conducive to the improvement of production yield. improve. In the manufacturing method of the flexible cover plate of the present invention, a second flexible substrate that is completely filled between the first ink area and the second ink area is formed on one side of the first flexible substrate, thereby eliminating the problem caused by the ink layer on the second ink layer. A gap caused by a flexible substrate, so that in the process of use, a thinner optical adhesive layer can be used to achieve a good bonding effect, thereby reducing the thickness of the flexible OLED display device and improving its bending resistance. At the same time, it also reduces the lamination difficulty of the flexible cover, which is beneficial to the improvement of the production yield. The flexible OLED display device of the present invention adopts the above-mentioned flexible cover plate, which can eliminate the gap caused by the ink layer, reduce the thickness of the flexible OLED display device, improve its bending resistance, and also reduce the difficulty of bonding, which is beneficial Improvement in production yield.

As mentioned above, for those of ordinary skill in the art, various other corresponding changes and deformations can be made according to the technical scheme and technical concept of the present invention, and all these changes and deformations should belong to the protection scope of the claims of the present invention .

Claims (10)

1. a kind of flexible cover plate, it is characterised in that including the first flexible substrates (11), located at first flexible substrates (11) together The second flexible substrates (12) and ink layer (13) of side and the hardened layer located at the first flexible substrates (11) opposite side (14)；

The ink layer (13) includes spaced first ink area (131) and the second ink area (132), and described second is flexible Substrate (12) is filled between first ink area (131) and the second ink area (132).

2. flexible cover plate as claimed in claim 1, it is characterised in that first ink area (131) and the second ink area (132) thickness is identical, surface of second flexible substrates (12) away from first flexible substrates (11) and the ink layer (13) flush away from first flexible substrates (11).

3. flexible cover plate as claimed in claim 1, it is characterised in that also include covering second flexible substrates (12) and oil 3rd flexible substrates (15) of layer of ink (13), the 3rd flexible substrates (15) and second flexible substrates (12) one into Type.

4. flexible cover plate as claimed in claim 3, it is characterised in that second flexible substrates (12), first flexibility Substrate (11) is identical with the material of the 3rd flexible substrates (15).

5. flexible cover plate as claimed in claim 2, it is characterised in that second flexible substrates (12) and the ink layer (13) thickness is 10-25 μm.

6. flexible cover plate as claimed in claim 3, it is characterised in that the thickness of the ink layer (13) is 10-25 μm, described The thickness sum of the thickness of second flexible substrates (12) and the 3rd flexible substrates (15) is 20-50 μm.

7. a kind of preparation method of flexible cover plate, it is characterised in that comprise the following steps：

Step S1, the first flexible substrates (11) are made；

Step S2, the second flexible substrates (12) and ink layer (13) are formed in the side of first flexible substrates (11), in institute The opposite side for stating the first flexible substrates (11) forms hardened layer (14)；Wherein, the ink layer (13) includes spaced the One ink area (131) and the second ink area (132), second flexible substrates (12) are filled in first ink area (131) And second between ink area (132).

8. the preparation method of flexible cover plate as claimed in claim 7, it is characterised in that it is flexible that second is formed in the step S2 Substrate (12) and the detailed process of ink layer (13) are：First the second flexible base is made in the side of first flexible substrates (11) Bottom (12), then in periphery the first ink area of formation of second flexible substrates (12) by way of attaching or printing And the second ink area (132), and first ink area (131) and the second ink area (132) and the described second flexible base (131) Without interval between bottom (12)；

First ink area (131) is identical with the thickness of the second ink area (132), and second flexible substrates (12) are away from institute State surface and flush of the ink layer (13) away from first flexible substrates (11) of the first flexible substrates (11)；

The thickness of second flexible substrates (12) and the ink layer (13) is 10-25 μm.

9. the preparation method of flexible cover plate as claimed in claim 7, it is characterised in that also include in the step S2：Formed The step of covering the 3rd flexible substrates (15) of second flexible substrates (12) and ink layer (13),

The detailed process for forming the second flexible substrates (12), ink layer (13) and the 3rd flexible substrates (15) is：First described the The side of one flexible substrates (11) forms the first ink area (131) and the second ink area by way of attaching or printing (132), then first flexible substrates (11) homonymy by be integrally formed to be formed be filled in the first ink area (131) and The second flexible substrates (12) between second ink area (132) and covering second flexible substrates (12) and ink layer (13) 3rd flexible substrates (15)；

The material phase of second flexible substrates (12), first flexible substrates (11) and the 3rd flexible substrates (15) Together；The thickness of the ink layer (13) is 10-25 μm, the thickness and the 3rd flexible substrates (15) of second flexible substrates (12) Thickness sum be 20-50 μm.

10. a kind of flexible OLED display, it is characterised in that including the flexible cover as any one of claim 1-6 Plate (10), the oled panel (20) being oppositely arranged with the flexible cover plate (10) and located at the flexible cover plate (10) and institute State the optical cement layer (30) for the rwo being bonded together between oled panel (20)；Wherein, the flexible cover plate (10) is provided with Ink layer (13) side is towards the oled panel (20).