CN113112923A - Curved surface cover plate and bendable display device - Google Patents

In the present application, the

100 is used for a foldable display device. The

100 has at least one

100A and a

100B connected to the

100A. The

100 includes a

10 and an edge curved

20 disposed around the

10. When the

100 is in the bending state, the

100 is folded along the

100A. The

10 and the edge curved

20 in the

100B are 3D glass.

Wherein, the number of the

100A is at least one. For example, the number of the

100A may be 1, 2 or more, and the bendable regions may be specifically set according to the specification of the bendable display device. When the number of the

100A is 1, the

100B may be located at two opposite sides of the

100A. In addition, the

100 may be bent in a forward direction or a reverse direction, which is not particularly limited in the present application.

In the present application, the 3D glass may be made of common glass or ultra-thin glass, and may be designed according to the structure of the

100. The thickness of the ordinary glass is 450 to 550 μm. The ultra-thin glass has a thickness of 25 to 35 microns.

The present application provides a

100. The

100 has at least one

100A and a

100B connected to the

100A. When the

100 is in the bending state, the

100 is folded along the

100A. The

100 includes a

10 and an edge

20 disposed around the

10. The application provides a

100 that can buckle dynamically sets up to 3D glass through

10 and the

20 in edge that will be located

100B, and when

100 was used to the display device that can buckle,

20 in edge of

100 and the laminating of the side of display device that can buckle, the side of display device that can buckle can show to the screen that has improved the display device that can buckle accounts for than.

In addition, in the

100, the

100B is a main body portion of the

100. Therefore, the

10 and the edge curved

20 located in the

100B are formed of 3D glass, so that the

100 has high overall hardness, is not easily scratched, and is not easily broken, and the surface hardness and scratch resistance of the

100 can be improved, and at the same time, the display effect can be improved.

In the present application, the

10 and the edge curved

20 in the

100B are 3D glass, and the

10 and the edge curved

20 in the

100A may be 3D glass or other materials such as a flexible substrate, which is not particularly limited in the present application.

In the present embodiment, the material of the

10 of the

100A is a transparent flexible material. The edge curved

20 located in the

100A is 3D glass. The

10 and the edge curved

20 in the

100B are 3D glass.

In the present embodiment, the

10 located in the

100A is made of a transparent flexible material, and the edge curved

20 located in the

100A and the

10 and the edge curved

20 located in the

100B are both made of 3D glass, so that the

100 meets the design requirement of 3D appearance. Meanwhile, the bending resistance of the transparent flexible material is high, so that the bending capability of the

100 is improved. The effect of taking account of flexibility and hardness can be achieved while the curved

100 is dynamically bent. Meanwhile, due to the easy processability of the transparent flexible material, the production cost can be reduced.

Further, in some embodiments of the present application, the refractive index of the

10 of the

100A is equal to the refractive index of the

10 of the

100B. That is, the refractive index of the transparent flexible material forming the

10 of the

100A is equal to the refractive index of the 3D glass forming the

10 of the

100B.

It can be understood that, since the

10 of the

100A is adjacent to the

10 of the

100B, and the materials forming the two are different, the display unevenness is likely to occur at the joint. The refractive indexes of the

10 of the

100A and the

100B are equal, so that the

10 of the

100A and the

100B can be spliced naturally, optical inhomogeneity is weakened, and the appearance effect and the display effect of the curved

100 are improved.

In some embodiments of the present application, the

100 may be integrally formed using 3D glass. And then, etching the curved

100 to remove part of the 3D glass in the

100A. The

10 is finally formed from a transparent flexible material.

Referring to fig. 1B and fig. 5, fig. 5 is a schematic view of a second cross-sectional structure of the curved cover plate shown in fig. 1B along FF'. The difference from the

100 shown in fig. 1B-4 is that, in the present embodiment, the

10 of the

100A is connected to the edge curved

20 of the

100A by the transparent

30.

The material of the

30 may be transparent Optical Adhesive (OCA) or Liquid Optical Adhesive (OCR).

Because the material of the

10 and the edge curved

20 in the

100A is different, the

10 and the edge curved

20 in the

100A are connected together by the transparent

30, so that the overall stability of the

100 can be improved, and the anti-falling capability and durability of the

100 can be improved. In addition, when the

100 is in the bent state, the

10 and the edge curved

20 in the

100A are subjected to bending stress. At this time, since the transparent

30 has a certain creep property, a certain amount of deformation can be provided when bending, and the bending resistance of the

100 can be further improved.

Of course, in other embodiments, the

10 and the edge curved

20 in the

100A may be connected by melting, solidifying, direct injection molding, etc., and this embodiment is not to be construed as limiting the present application.

Referring to fig. 1A, fig. 1B, fig. 6 and fig. 7, fig. 6 is a schematic view of a second cross-sectional structure of the curved cover plate shown in fig. 1A along EE'. FIG. 7 is a schematic view of a third cross-sectional structure of the curved cover plate shown in FIG. 1B along FF'. The difference from the

100 shown in fig. 1B-4 is that, in the present embodiment, the

10 of the

100A is 3D glass, and the material of the edge curved

20 of the

100A is transparent and flexible material. The thickness of the

10 of the

100A is 25 to 35 μm.

Specifically, the thickness of the

10 located in the

100A may be 25 micrometers, 28 micrometers, 30 micrometers, 32 micrometers, 35 micrometers, or the like. The

10 of the

100A is thinner to facilitate the folding of the

100.

In the present embodiment, the

10 of the

100 and the edge curved

20 in the

100B are both made of 3D glass, so that the

100 meets the design requirement of 3D appearance. In addition, the

100 formed of 3D glass is easily broken when dropped, especially at the edge portion with a curvature. The present embodiment forms the edge curved

20 located in the

100A by using a flexible transparent material, and can reduce the processing cost of the curved surface portion due to the easy processability of the flexible transparent material. Meanwhile, the edge curved

20 formed by the flexible transparent material can be directly assembled with the display panel during assembly, the protection effect on the display panel can be achieved, and the falling resistance performance is improved.

Further, in the present embodiment, the thickness of the

10 located in the

100A may be equal to or different from the thickness of the

10 located in the

100B, which is not specifically limited in the present application.

For example, in some embodiments of the present application, please continue to refer to fig. 6 and 7, the thickness of the

10 of the

100A is equal to the thickness of the

100 of the

100B. That is, in the

100, the thickness of the

10 is the same as the thickness of the edge curved

20 located at the

100B. At this time, the

10 and the edge curved

20 located at the

100B may be formed of ultra-thin glass to improve the bending resistance of the

100.

This embodiment makes the thickness uniformity of

100, has further improved the outward appearance effect of

100. Meanwhile, since the thickness of the

10 is the same as the thickness of the edge curved

20 located in the

100B, and the material of the

10 is the same as the material of the edge curved

20 located in the

100B, the

10 and the edge curved

20 located in the

100B can be simultaneously formed by using the same process, thereby reducing the process steps.

For example, in other embodiments of the present application, please refer to fig. 1A and 8, fig. 8 is a schematic view of a third cross-sectional structure of the curved cover plate shown in fig. 1A along EE'. The thickness of the

10 in the

100A is smaller than that of the

10 in the

100B.

It is understood that the

100 includes a bent state. When the

100 is in the bending state, the

100 is folded along the

100A. At this time, both the

10 and the peripheral

20 in the

100A are subjected to bending stress. In this embodiment, the thickness of the

10 of the

100A is smaller than the thickness of the

10 of the

100B, so that the bending resistance of the

10 of the

100A can be improved, and the problem of cracking or breaking of the

100 during bending can be avoided.

Specifically, the

10 of the bending

100A and the

100B may be formed by using common glass, and then the

10 of the bending

100A is etched and thinned by etching or the like. It should be noted that although the thickness of the

10 of the

100A is smaller than that of the

10 of the

100B, the surface of the

10 of the

100A is flush with the surface of the

10 of the

100B, so as to ensure the flatness of the

100 and the bendable display device. The surface is a light emitting surface of the

100 attached to the bendable display device.

Of course, in other embodiments, the

10 of the

100B may be formed of a common glass, and the

10 of the

100A may be formed of an ultra-thin glass, such that the thickness of the

10 of the

100A is smaller than the thickness of the

10 of the

100B.

In another embodiment of the present application, referring to fig. 9, fig. 9 is a schematic view of a fourth cross-sectional structure of the curved cover plate shown in fig. 1A along EE'. Wherein, a

101 is disposed on a side of the

100 away from the light-emitting surface of the bendable display device. The

101 is located on the

10 of the

100A.

Specifically, the planar structure of the

101 may be rectangular, trapezoidal, triangular, etc., and this is not particularly limited in this application. The number of the

101 may be multiple, and specifically may be set according to the size of the

100A.

In this embodiment, the

10 of the

100A is provided with the

101, so that the bending resistance of the

100 can be further improved. Further, when the

100 is applied to a bendable display device, the

100 can be attached to the bendable display device through transparent optical glue. At this time, the

101 is filled with transparent optical cement. The transparent optical cement filled in the

101 can provide more deformation, and release more stress when the

100 is in a bent state, thereby preventing the

100 from generating cracks or fractures.

Referring to fig. 1B and 10, fig. 10 is a schematic view of a fourth cross-sectional structure of the curved cover plate shown in fig. 1B along FF'. The difference from the

100 shown in fig. 1B-4 is that, in the present embodiment, the

10 and the edge curved

20 located in the

100A are 3D glass, and the thickness of the 3D glass is 25 micrometers to 35 micrometers. That is, in the present embodiment, the curved

100 is formed of ultra-thin glass.

In the

100 provided in this embodiment, the

100 may be integrally formed of ultra-thin glass, thereby improving production efficiency. The entire

100 is formed of 3D glass, which can improve the overall hardness and scratch resistance of the

100. And the edge radian of the 3D glass can bring better holding feeling and anti-collision capability, so that the curved

100 is more durable. In addition, the curved

100 provided by the embodiment is applied to the bendable display device, and the screen occupation ratio of the bendable display device can be improved while the dynamic bending requirement is met.

Correspondingly, the application also provides a bendable display device which comprises a curved surface cover plate. The curved cover plate is the

100 described in any of the above embodiments, and please refer to the above contents for further description.

Specifically, please refer to fig. 11, fig. 11 is a schematic structural diagram of the flexible display device provided in the present application. Including a

200 and a

100. The

100 is attached to the display surface of the

200.

The

100 may be attached to the

200 by transparent optical cement or liquid optical cement. The center portion of the

100 is attached to the flat surface portion of the

200. The edge curved surface portion of the

100 is attached to the side surface of the

200. Both the flat surface portion and the side surface of the

200 perform display. Since the entire surface of the

100 has a curvature, the

200 can be well supported and protected.

The present application provides a

1000, which includes a

100. The

100 has at least one bendable region and a non-bendable region connected to the bendable region. When the

100 is in the bending state, the

100 is folded along the bendable region. The

100 includes a central portion and an edge curved portion disposed around the central portion. The application sets the central part and the edge curved surface part in the non-bending area as 3D glass, and can improve the surface hardness and scratch resistance of the

100. Meanwhile, when the

100 is applied to the

1000, the edge curved

20 of the

100 is attached to the side of the

1000, and the side of the

1000 can display, thereby improving the screen occupation ratio of the

1000.

1. The curved cover plate is applied to a bendable display device and is provided with at least one bendable region and a non-bendable region connected with the bendable region, when the curved cover plate is in a bent state, the curved cover plate is folded along the bendable region, and the curved cover plate comprises a central portion and an edge curved surface portion arranged around the central portion;

wherein the central portion and the edge curved surface portion at the non-bending region are 3D glass.

2. The curved cover plate of claim 1, wherein the material in the central portion of the bendable region is a transparent flexible material, and the edge curved portion in the bendable region is 3D glass.

3. The curved cover plate of claim 2, wherein the refractive index of the central portion of the bendable region is equal to the refractive index of the central portion of the non-bendable region.

4. The curved cover plate of claim 2, wherein the central portion of the bendable region and the edge curved portion of the bendable region are connected by a transparent adhesive layer.

5. The curved cover plate according to claim 1, wherein the central portion of the bendable region is 3D glass, and the material of the edge curved portion of the bendable region is transparent and flexible;

wherein the thickness of the central portion of the bendable region is 25 to 35 microns.

6. The curved cover plate of claim 5, wherein the thickness of the curved cover plate at the central portion of the bendable region is equal to the thickness of the curved cover plate at the non-bendable region.

7. The curved decking of claim 5, wherein the thickness of the central portion in the pliable zone is less than the thickness of the central portion in the non-pliable zone.

8. The curved cover plate of any one of claims 1-7, wherein the transparent flexible material is any one of silicone, polyimide, polydimethylsiloxane, polyurethane, polyethylene terephthalate, and polyethylene naphthalate.

9. The curved cover sheet of claim 1, wherein the central portion and the edge curved portions at the bendable region are 3D glass, and the 3D glass has a thickness of 25 to 35 microns.

10. A bendable display device, comprising a display panel and a curved cover plate, wherein the curved cover plate is attached to the display surface of the display panel, and the curved cover plate is the curved cover plate according to any one of claims 1 to 9.