KR20180008204A - Fordable cover window and fordable display device comprising the same - Google Patents

Abstract

According to an embodiment of the present invention, a foldable cover window comprises: a flexible substrate including an effective area and a non-effective area; a hard coating layer on one surface of the flexible substrate; a decoration layer disposed on the non-effective area of the other surface opposite to the one surface thereof; a planarization layer disposed on the other surface thereof, and covering the effective area and the decoration layer; and a polarizing layer disposed on the planarization layer. According to an embodiment of the present invention, the present invention relates to a foldable cover window which comprises: a flexible substrate including an effective area and a non-effective area; a hard coating layer disposed on one surface of the flexible substrate; a polarizing layer on the other surface opposite to one surface of the flexible substrate; a decoration layer disposed on the non-effective area of the polarizing layer; and a planarization layer disposed on the polarizing layer, and covering the effective area and the decoration layer. According to an embodiment of the present invention, a foldable display device comprises: a cover window for a foldable display including a flexible substrate including an effective area and a non-effective area, a hard coating layer on one surface of the flexible substrate, a decoration layer disposed on the non-effective area of the other surface opposite to the one surface thereof, a planarization layer disposed on the other surface thereof, and covering the effective area and the decoration layer, a polarizing layer disposed on the planarization layer, and an adhesive layer on the polarizing layer; and a display panel disposed on the adhesive layer of the cover window for a foldable display.

Description

[0001] DESCRIPTION [0002] [DESCRIPTION] [0001] The present invention relates to a foldable window and a folder-

The present invention relates to a foldable window and a foldable display device including the same.

2. Description of the Related Art [0002] As display devices having high resolution and low power are required, various display devices such as a liquid crystal display device and an electroluminescent display device have been developed.

An electroluminescent display device is attracting attention as a next-generation display device due to excellent characteristics such as low light emission, low power consumption, and high resolution as compared with a liquid crystal display device.

An electric field display device includes an organic light emitting display device and an inorganic light emitting display device. That is, the organic light emitting display device and the inorganic light emitting display device can be distinguished according to the material of the light emitting layer.

Among these, organic light emitting display devices are attracting attention because they have a wide viewing angle, have a fast response speed, and are required to have low power.

In addition, since the organic thin film has flexibility, various studies are being conducted on a display device using an organic light emitting diode (OLED).

Attempts have been made to place a deco film or a polarizing film on the foldable cover window because the foldable display device requires not only flexibility but also hardness.

However, in order to attach the decorative film to the cover substrate, an adhesive is required, and the thickness of the adhesive and the decorative film increases the overall thickness of the cover substrate for the foldable display.

Further, even when the polarizing film is arranged on the cover substrate, there is a problem that the entire thickness of the cover substrate for a foldable display increases due to the thickness of the polarizing film.

Accordingly, there is a need for a folder-type cover window having a new structure and a folder-type display device including the same for solving such a problem.

The embodiments provide a foldable cover window having improved flexibility and reliability and a folder-blind display device including the same.

A foldable cover window according to an embodiment includes a flexible substrate including a valid region and a non-valid region; A hard coating layer on one side of the soft substrate; A decor layer disposed on the ineffective area of the other surface opposite to the one surface; A planarization layer disposed on the other surface and covering the effective region and the decor layer; And a polarizing layer disposed on the planarizing layer.

A foldable cover window according to an embodiment includes a flexible substrate including a valid region and a non-valid region; A hard coating layer disposed on one surface of the soft substrate; A polarizing layer on the other surface opposite to one surface of the soft substrate; A decor layer disposed on the ineffective area of the polarizing layer; And a planarization layer disposed on the polarizing layer and covering the effective region and the decor layer.

A foldable display device according to an embodiment includes a flexible substrate including a valid region and a non-valid region; A hard coating layer on one side of the soft substrate; A decor layer disposed on the ineffective area of the other surface opposite to the one surface; A planarization layer disposed on the other surface and covering the effective region and the decor layer; A polarizing layer disposed on the planarization layer; And an adhesive layer on the polarizing layer; and a display panel disposed on the adhesive layer of the cover window for the foldable display.

The foldable cover window according to the embodiment can provide a flexible and thin folder-type cover window by arranging a decor layer and a polarizing layer on a flexible substrate having flexible characteristics.

That is, the foldable cover window according to the embodiment can reduce the thickness of the deco film and the adhesive layer by disposing the deco layer on the soft substrate. Further, by forming the polarizing layer on the soft substrate with the thin coating film, unlike the polarizing film, no separate substrate is required, and the foldable or flexible characteristics of the foldable cover window can be improved.

In the foldable cover window according to the embodiment, a planarization layer may be disposed between the decor layer and the polarizing layer. Thus, it is possible to prevent the problem that the polarizing function such as the light leaking or the polarization direction being changed by the step of the decor layer when the polarizing layer is formed on the decor layer is lowered. In addition, since the decor layer can be disposed on the upper part of the polarizing layer, it can realize not only black and white but also metallic colors such as gold and silver, and various colors such as blue, red and green.

The foldable cover window according to the embodiment can arrange the decor layer for preventing the wiring portion and the circuit of the electrode from being visible and the polarizing layer for preventing the external light from reflecting on the single flexible flexible substrate without stepping, The functional layer can be provided and flexibility and reliability can be improved.

The foldable display device according to the embodiment can sequentially arrange the electrode layer and the display panel below the foldable cover window, thereby providing a foldable display device with improved flexibility and reliability.

1 to 6 are sectional views related to the first embodiment.
Figs. 7 to 18 are sectional views related to the second embodiment. Fig.
19A to 19M are cross-sectional views illustrating a manufacturing process of a foldable cover window and a foldable display device including the same according to FIG. 14,
Fig. 20 is a plan view of the folder cover window. Fig.
21 is a view for explaining the shape of the electrode layer of the foldable cover window.
Fig. 22 is a plan view of a foldable cover window including a decor layer. Fig.
23 to 25 are views for explaining a foldable display device in which a folder cover window and a display panel are combined.
26A to 26C are views showing an example of various device devices to which the folder-type display device according to the embodiment is applied.

In the description of the embodiments, it is to be understood that each layer (film), area, pattern or structure may be referred to as being "on" or "under / under" Quot; includes all that is formed directly or through another layer. The criteria for top / bottom or bottom / bottom of each layer are described with reference to the drawings.

Also, when a part is referred to as being "connected" to another part, it includes not only a case of being "directly connected" but also a case of being "indirectly connected" with another member in between. Also, when a component is referred to as "comprising ", it is meant that it can include other components, not excluding other components, unless specifically contrary to what is claimed otherwise.

The thickness or the size of each layer (film), region, pattern or structure in the drawings may be modified for clarity and convenience of explanation, and thus does not entirely reflect the actual size.

A foldable cover window according to an embodiment includes a soft substrate, a decor layer and a planarizing layer are disposed on the soft substrate, and a polarizing layer may be disposed on the decor layer and the upper or lower portion of the planarizing layer.

1 to 6, a description will be given of a folder cover window in which a polarizing layer is disposed on top of a decor layer and a planarizing layer according to the first embodiment.

The foldable cover window according to the first embodiment may include a soft substrate 100, a hard coating layer 110, a polarizing layer 200, a planarizing layer 300, and a polarizing layer 400.

1 to 3, the hard coating layer 110 is disposed on one surface of the soft substrate 100, the polarizing layer 400 is disposed on a surface opposite to the one surface of the soft substrate, The decor layer 200 and the planarization layer 300 may be disposed on the polarizing layer 400. [

The soft substrate 100 may have a flexible characteristic. Alternatively, the soft substrate 100 may have a fordable, curved, or bended characteristic.

The soft substrate 100 may be curved with a partially curved surface. That is, the soft substrate 100 may have a flat surface, and may have a curved surface partially. In detail, the end of the soft substrate 100 may have a curved surface or be curved or bent with a surface including a random curvature.

A frame for covering the bezel may not be disposed on the upper portion of the soft substrate 100. That is, since the upper portion of the soft substrate 100 does not have a region to enclose the frame, it is possible to prevent the flexible characteristic of the soft substrate 100 from being deteriorated by the frame. That is, the flexible substrate 100 may have a flexible characteristic as a whole in both the effective region and the non-effective region.

The soft substrate 100 may include plastic. And may include plastics having flexible characteristics such as polyimide (PI), polyethylene terephthalate (PET), propylene glycol (PPG) polycarbonate (PC), and the like in detail.

More specifically, since the soft substrate 100 includes a soft plastic such as polyimide or polyethylene terephthalate, flexibility may be large unlike a glass soft substrate. Accordingly, the plastic soft substrate can improve the flexibility of the folder cover window and reduce the thickness thereof.

In addition, the soft substrate 100 may include an optically isotropic film. For example, the soft substrate 100 may include a cyclic olefin copolymer (COC), a cyclic olefin polymer (COP), a polycarbonate (PC), a light polymethyl methacrylate (PMMA), or the like .

In the soft substrate 100, a valid region AA and a non-valid region UA may be defined.

The display may be displayed in the effective area AA and the display may not be displayed in the non-valid area UA disposed around the valid area AA.

The soft substrate 100 may be transparent. That is, the soft substrate 100 may be a transparent film. Accordingly, light emitted from the display unit can be recognized by the user on the flexible substrate 100.

Also, at least one of the effective area AA and the ineffective area UA may sense the position of an input device (e.g., a finger, a stylus pen, etc.). For example, when the foldable display device includes a touch sensor electrode layer, when an input device such as a finger touches the flexible substrate 100, a difference in capacitance occurs at a portion where the input device touches , The portion where such a difference occurs can be detected as the contact position.

The thickness of the soft substrate 100 may be 30 占 퐉 or more. The thickness of the soft substrate 100 may range from 30 탆 to 70 탆. For example, the thickness of the soft substrate 100 may be 30 탆 to 50 탆.

When the thickness of the soft substrate 100 is in the range of 30 탆 to 70 탆, flexibility and reliability can be obtained at the same time.

For example, when the thickness of the soft substrate 100 is less than 30 占 퐉, the impact resistance may be deteriorated. As a result, the soft substrate 100 may be damaged. Alternatively, there is a problem that damage to the electrode layer, the polarizing layer, and the display panel, such as cracks, may occur due to a decrease in the impact resistance of the soft substrate 100.

For example, when the thickness of the soft substrate 100 is more than 70 μm, there is a problem that the flexible characteristic or the foldable characteristic of the soft substrate 100 is deteriorated.

The hard coating layer 110 may be disposed on one side of the soft substrate 100. One surface of the soft substrate 100 may be the upper surface of the soft substrate 100 as a surface close to the user. In detail, the hard coating layer 110 may be disposed on the effective region and the non-effective region of the soft substrate 100.

The hard coat layer 110 can prevent damage to the folder cover window due to an external impact. For example, the hard coating layer 110 is disposed on one side of the soft substrate 100, thereby improving the hardness of the soft substrate 100. For example, the hard coating layer 110 may have a hardness of 2H or higher.

That is, the foldable cover window according to the embodiment includes the hard coating layer disposed on the soft substrate, so that the reliability of the foldable display device can be improved.

The hard coating layer 110 may include an inorganic or organic composite material. For example, the hard coating layer 100 may include a transparent organic / inorganic composite material. Since the hard coating layer 100 includes an organic-inorganic hybrid material, the adhesion property to the soft substrate 100 may be high, and the soft substrate 100 may be protected while the light transmittance may not be deteriorated.

The hard coating layer 110 may have a thickness of 15 탆 or less. For example, the hard coating layer 110 may have a thickness of 10 mu m to 15 mu m. It is possible to protect the foldable cover window from external impact in the range of the thickness of the hard coat layer 110 of 10 mu m to 15 mu m, and the flexible property can be excellent.

For example, when the thickness of the hard coating layer 110 is less than 10 mu m, the effect of preventing damage to the foldable cover window from external impact may be deteriorated.

For example, when the thickness of the hard coating layer 110 is more than 15 mu m, the thickness of the foldable cover window may increase. Further, as the thickness of the folder cover window is increased by the hard coat layer, the flexibility may be lowered.

4 to 6, the hard coating layers 110 and 120 are disposed on both surfaces of the soft substrate 100, the polarizing layer 400 is disposed on the opposite surface of the soft substrate 100, A decor layer 200 and a planarization layer 300 may be disposed on the polarizing layer 400.

The hard coating layer may include a first hard coating layer 110 and a second hard coating layer 120.

The first hard coating layer 110 may be disposed on one surface of the soft substrate 100 and the second hard coating layer 120 may be disposed on the other surface of the soft substrate 100 opposite to the first surface.

The second hard coating layer 120 may be disposed between the soft substrate 100 and the polarizing layer 400.

The first hard coating layer 110 and the second hard coating layer 120 may be in direct contact with the both surfaces of the soft substrate 100.

When the hard coating layer is disposed on one surface and the other surface of the soft substrate 100, the curling phenomenon of the soft substrate 100 may be reduced. Thus, the convenience of the manufacturing process of the foldable cover window according to the embodiment can be improved, and the production yield of the foldable display device including the foldable cover window can be improved.

The first hard coating layer 110 and the second hard coating layer 120 may each have a thickness of 15 μm or less. For example, the first hard coating layer 110 may have a thickness of 10 탆 to 15 탆, and the second hard coating layer 120 may have a thickness of 10 탆 to 15 탆.

1 to 6, a polarizing layer 400 may be disposed on the other surface opposite to the one surface of the soft substrate 100. The polarizing layer 400 may be disposed on the effective region and the non-effective region of the soft substrate 100.

The polarizing layer 400 may have a light transmittance of 50% or less. For example, the polarizing layer 400 may be a transparent material having a black-based color. Accordingly, the polarizing layer 400 can reduce the degree of reflection of external light, thereby improving the visibility in the outdoor with strong external light.

The polarizing layer 400 may include an organic-inorganic hybrid material. For example, the polarizing layer 400 may include a polymer and a dye. In detail, the polarizing layer 400 may include a photoreactive polymer and a dye.

The polarizing layer 400 may be disposed on the flexible substrate 100 with a small thickness. The polarizing layer 400 may be a coating layer. In detail, the polarizing layer 400 may be a thin film formed by coating.

The polarizing layer 400 may have a thickness of 5 탆 or less. The polarizing layer 400 may have a thickness of 1 to 5 占 퐉. For example, the polarizing layer 400 may have a thickness of 1 탆 to 3 탆.

As the polarizing layer 400 is disposed at 5 mu m or less, the flexibility of the foldable cover window can be improved. In detail, the foldable cover window according to the embodiment can be improved in flexibility by replacing the polarizing film having the thickness of 5 占 퐉 to 20 占 퐉 with the polarizing layer having the thickness of 5 占 퐉 or less.

For example, when the polarizing layer 400 is more than 5 mu m, the flexible characteristics may be deteriorated.

The decor layer 200 may be disposed on the polarizing layer 400. In detail, the decor layer 200 may be disposed on the ineffective area on the polarizing layer 400.

Since the decor layer 200 is disposed on the ineffective area, the circuit part, the wiring electrode, and the like can be prevented from being visually recognized.

The decor layer 200 may include a shielding layer. The deco layer 200 may have a light transmittance of 1% or less as it includes a shielding layer.

The thickness of the decor layer 200, that is, the shielding layer may be in the range of 1 탆 to 20 탆.

The decor layer 200, i.e., the shield layer may be a single layer or a plurality of layers.

The decor layer 200 may be black or white.

The decor layer 200 may be a black matrix formed by photolithography or a printing layer printed with a thermosetting resin or a photocurable resin.

For example, the decor layer 200 may be a black matrix.

At this time, the decor layer may have a thickness of 1 탆 to 10 탆.

For example, a shield layer formed of a black matrix may represent black or white. The black matrix representing the black color may be formed as a single layer. At this time, the single layer may include a layer having a thickness of 1 占 퐉 to 2 占 퐉. On the other hand, the black matrix representing white may be formed of two layers. At this time, the two layers may include those having a thickness of 5 占 퐉 to 8 占 퐉.

The black matrix may include an acrylic copolymer solid, a photoinitiator, and a multifunctional monomer, a black or white pigment, an additive, and a solvent. For example, the decor layer formed from the black matrix may comprise from 3 to 10 weight percent acrylic copolymer solids, from 5 to 15 weight percent of photoinitiator and multifunctional monomer, from 5 to 15 weight percent of black or white pigment, less than 5 weight percent of additive, By weight to 85% by weight. For example, the black pigment may be carbon black, and the white pigment may be titanium oxide.

Alternatively, the decor layer 200 may be formed of a thermosetting or photo-curable printing material. At this time, the decor layer may include a layer having a thickness of 7 mu m to 20 mu m.

For example, the black print layer may be formed to a thickness of 7 탆 to 15 탆 through 2-degree printing. For example, the white print layer may be formed to have a thickness of 12 to 20 占 퐉 through 3-degree printing. In detail, the 3-degree printing can be formed by printing the white printing layer 2 degrees and printing the black printing layer 1 degree.

The thermosetting or photo-curable printing material may comprise a polyester resin, a curing agent, a pigment, an additive and a solvent. For example, it may comprise 50 to 68% by weight of a polyester resin, 5 to 20% by weight of a curing agent, 10 to 20% by weight of a pigment, 5 to 20% by weight of an additive and 15 to 25% by weight of a solvent.

The planarization layer 300 may be disposed on at least one surface of the decor layer 200 and on the effective area of the polarizing layer 400. The planarization layer 300 may have a thickness corresponding to the thickness of the decor layer 200 or a thickness greater than that of the decor layer 200. That is, the planarization layer 300 may be disposed at a height corresponding to one side of the decor layer 200, or may be disposed to have a larger thickness than the decor layer 200 while covering the upper surface and one side of the decor layer 200 have.

The planarization layer 300 may be disposed on the effective area and the non-effective area while covering one side surface and the bottom surface of the decor layer 200. Accordingly, the planarization layer 300 can remove a step that may occur as the decor layer 200 is partially disposed in the ineffective area.

The planarization layer 300 may be a non-solvent type. Accordingly, the planarization layer 300 may have a structure in which there is no step or a step is minimized.

The planarization layer 300 may include a transparent resin layer. For example, the planarization layer 300 may include a photocurable resin having a hardness of 2H or more and having a flexible property.

The planarization layer 300 may protect the polarizing layer 400.

In addition, the planarization layer 300 can protect the electrode layer 500. In detail, the planarization layer 300 is disposed between the polarizing layer 400 and the electrode layer 500, so that the electrode layer 500 can be disposed without a step. Thus, the embodiment can prevent the electrode from cracking, and can provide the foldable cover window with improved reliability.

The thickness of the decor layer 200 may be less than the thickness of the planarization layer 300. For example, the ratio of the thickness of the planarizing layer to the thickness of the decor layer, i.e., the shielding layer may be 1.5: 1 to 10: 1. For example, the ratio of the thickness of the planarization layer to the thickness of the shielding layer may comprise from 1.5: 1 to 5: 1. For example, the ratio of the thickness of the planarization layer to the thickness of the shielding layer may comprise 5: 1 to 10: 1.

The planarization layer may have a thickness of 10 to 30 占 퐉. The planarization layer may include a layer having a thickness of 10 to 20 占 퐉. When the thickness of the flattening layer is out of the range of 10 탆 to 30 탆, the step difference removing effect of the decor layer may be deteriorated.

The difference between the thickness (a) of the decor layer and the planarization layer on the ineffective area and the thickness (b) of the planarization layer on the effective area may be 0.1 mu m to 1 mu m. For example, the difference between the thickness (a) of the decor layer and the planarization layer on the ineffective area and the thickness (b) of the planarization layer on the effective area may be 0.1 탆 to 0.5 탆. For example, the difference between the thickness (a) of the decor layer and the planarization layer on the ineffective area and the thickness (b) of the planarization layer on the effective area may be 0.1 mu m to 0.3 mu m.

When the difference between the thickness (a) of the decoupling layer and the planarization layer on the non-effective region and the thickness (b) of the planarization layer on the effective region is more than 1 mu m, the arrangement defect of the polarizing layer or the electrode layer Or damage may occur.

The thickness H2 of the planarization layer in the ineffective area may be less than the thickness H1 of the decor layer. Accordingly, the embodiment can include the flattening layer having a thin thickness while removing the step of the decor layer, thereby improving the flexibility of the foldable cover window.

An electrode layer 500 may be disposed on the planarization layer 300. The electrode layer 500 may include a touch sensor electrode layer.

The electrode layer 500 may include various metals. For example, the electrode layer 500 may be formed of Cr, Ni, Cu, Al, Ag, or Mo. Gold (Au), titanium (Ti), and alloys thereof.

In addition, the electrode layer 500 may be arranged in a mesh shape. Since the electrode layer 500 has a mesh shape, the pattern of the electrode layer 500 can be made invisible on the effective area AA. That is, even if the electrode layer 500 is formed of metal, the pattern can be made invisible. Also, even if the electrode layer 500 is formed in a large size, the resistance of the display device can be reduced.

Alternatively, the electrode layer 500 may include a nanowire, a photosensitive nanowire film, a carbon nanotube (CNT), a graphene, a conductive polymer, or a mixture thereof. Accordingly, the foldable cover window according to the embodiment can improve the flexible and / or bending characteristics.

When a nanocomposite such as a nanowire or a carbon nanotube (CNT) is used, the nanocomposite may be made of black, and the color and reflectance can be controlled while securing the electric conductivity by controlling the content of the nano powder. Accordingly, when manufacturing a foldable display device in which flexible and / or bending is implemented, the degree of freedom can be improved.

That is, the electrode layer 500 according to the embodiment may not include a rigid material such as indium tin oxide. The flexibility of the embodiment can be improved by including a flexible conductive material such as a metal or a conductive polymer.

The electrode layer 500 may have a thickness of 15 to 30 占 퐉. The electrode layer 500 may be supported by the soft substrate 100. Alternatively, the electrode layer 500 may be further provided with a film having a flexible property on the flexible substrate 100. That is, the separate flexible film supports the electrode, and the electrode layer 500 and the flexible substrate 100 can be bonded directly or indirectly through the adhesive layer.

On the other hand, a foldable cover window which is an upper substrate (TF) in a foldable display device includes a flexible substrate including a valid region and a non-valid region; A hard coating layer on one side or both sides of the soft substrate; A decor layer disposed on the ineffective area of the other surface opposite to the one surface; A planarization layer disposed on the other surface and covering the effective region and the decor layer; A polarizing layer disposed on the planarization layer; And an adhesive layer on the polarizing layer, and a display panel 700, which is a lower substrate (BF), may be disposed on the adhesive layer of the cover window for the foldable display. At this time, the display panel 700 may be an organic light emitting diode panel.

Referring to FIGS. 2 and 5, the foldable cover window, that is, the upper substrate TF, may include an electrode layer 500 and an adhesive layer 600. At this time, the electrode layer may be a touch sensor electrode layer.

Alternatively, the upper substrate TF may include an electrode layer 500 and the lower substrate BF may include an adhesive layer 600 although not shown in the figure.

Referring to FIGS. 3 and 6, the lower substrate BF may include an electrode layer 500 and an adhesive layer 600.

The lower substrate (BF) may comprise plastic. For example, the display panel 700 may include a film having a flexible characteristic.

The display panel 700 may include an organic light emitting diode thin film transistor (OLED TFT). That is, the lower substrate may be an organic light emitting diode panel.

The adhesive layer 600 may adhere the lower substrate BF to the foldable cover window TF.

The adhesive layer 600 may include a silicone-based optical adhesive (OCA). Accordingly, the adhesive layer 600 can have more flexible characteristics than the acrylic optical adhesive (OCA), and the flexibility of the foldable display device can be improved.

The adhesive layer 600 may include a layer having a thickness of 15 mu m to 20 mu m. If the thickness of the adhesive layer 600 is more than 20 占 퐉, the flexibility may be lowered.

The electrode layer 500 may be disposed on the planarization layer 300 or may be disposed on the lower substrate to adhere the upper substrate and the lower substrate. Accordingly, a foldable display device having improved flexibility and reliability can be formed.

The first embodiment can prevent exposure of the circuit portion and the like in the ineffective area, prevent the reflection of external light, and prevent the shielding layer and the polarizing layer It is possible to provide a foldable cover window having improved flexibility and a foldable display device including the same.

Referring to Figs. 7 to 18, a decoupled layer according to the second embodiment and a foldable cover window in which a polarizing layer is disposed below the planarizing layer will be described.

The description of the materials of the components corresponding to the first embodiment, that is, the material, the thickness, and the like will be omitted, and the differences between the first and second embodiments will be mainly described.

The foldable cover window according to the second embodiment may include a soft substrate 100, a hard coating layer 110, a decor layer 200, a planarization layer 300, and a polarizing layer 400.

7 to 9 and FIGS. 13 to 15, the hard coating layer 110 is disposed on one surface of the soft substrate 100, and a decor layer 200 (not shown) is formed on a surface opposite to the one surface of the soft substrate. And a planarization layer 300 may be disposed on the planarization layer 300, and a polarizing layer 400 may be disposed on the planarization layer 300.

Referring to FIGS. 10 to 12 and FIGS. 16 to 18, the hard coating layers 110 and 120 may be disposed on both sides of the soft substrate 100. In detail, the first hard coating layer 110 and the second hard coating layer 120 may directly contact the both surfaces of the soft substrate 100.

The first hard coating layer 110 may be disposed on one surface of the soft substrate 100 and the second hard coating layer 120 may be disposed on the other surface of the soft substrate 100 opposite to the first surface.

The second hard coating layer 120 may be disposed between the soft substrate 100 and the decor layer 200 and between the soft substrate 100 and the planarization layer 300.

Referring to FIGS. 7 to 18, the decor layer 200 may be disposed on the other surface of the soft substrate 100 opposite to the one surface. In detail, the decor layer 200 may be disposed on the ineffective area of the soft substrate 100.

Since the decor layer 200 is disposed on the polarizing layer 400, the decor layer 200 may exhibit various colors.

For example, the decor layer 200 may be black or white.

Referring to FIGS. 7 to 12, the decor layer 200 may include a shielding layer. Since the decor layer 200 includes only the shielding layer, the thickness of the foldable cover window can be reduced, and the process efficiency can be improved.

The decor layer 300 may be a black matrix formed by photolithography or a printing layer printed with a thermosetting resin or a photocurable resin.

The decor layer 300, i.e., the shield layer may be a single layer or a plurality of layers.

At this time, the thickness of the decor layer 300, that is, the shielding layer may be in the range of 1 탆 to 20 탆. It is a matter of course that the decor layer 300 may have various thicknesses in the range of 1 탆 to 20 탆 according to the process and color to be formed. In detail, the black shielding layer can have a thickness thinner than that of the white shielding layer, and the flexibility of the foldable cover window can be improved.

For example, the decor layer 200 may exhibit metallic colors such as gold and silver, and may display various colors such as blue, red, and green.

Referring to FIGS. 13 to 19, the decor layer 200 may include a pattern layer 210, a deposition layer 220, and a shield layer 230.

The pattern layer 210, the deposition layer 220, and the shielding layer 230 may be sequentially disposed on the flexible substrate 100. [ For example, the pattern layer 210, the deposition layer 220, and the shielding layer 230 may be sequentially disposed on the other surface of the soft substrate 100. The pattern layer 210, the deposition layer 220, and the shielding layer 230 may be disposed in order on the ineffective area UA of the soft substrate 100 in detail.

The pattern layer 210 may be disposed on the ineffective area UA of the soft substrate 100. For example, the pattern layer 210 may be disposed only in the ineffective area UA.

The pattern layer 210 may include a plurality of patterns. For example, the pattern layer 210 may include a first pattern 211 and a second pattern 212. The pattern layer 210 may include a plurality of patterns including a first pattern 211 and a second pattern 212 depending on the degree of freedom of pattern formation, to be.

At least one pattern of the first pattern 211 and the second pattern 212 may have a distance D1 from one end to the other end of 3 占 퐉 or more. For example, at least one of the first pattern 211 and the second pattern 212 may have a distance D1 between one end and the other end of 3 to 2 mm.

At least one pattern of the first pattern 211 and the second pattern 212 may have a reduced process efficiency when the distance D1 from one end to the other end is less than 3 mu m.

The first pattern 211 and the second pattern 212 may be spaced apart from each other. For example, an area between the first pattern 211 and the second pattern 212 may be an open area where the soft substrate 100 is exposed. In detail, the plurality of patterns disposed on the soft substrate 100 may not be connected to each other. More specifically, the first pattern 211 and the second pattern 212 disposed on the soft substrate 100 may be discontinuous patterns that are not connected to each other.

That is, the first pattern 211 and the second pattern 212 may not be connected to each other in the pattern layer 210 viewed from the cross section of the foldable cover window according to the embodiment. Meanwhile, the first pattern 211 and the second pattern 212 may be connected to each other in the pattern layer 210 viewed from the front, that is, the top surface of the foldable cover window according to the embodiment. For example, the pattern layer 210 seen from the front of the foldable cover window according to the embodiment may be a shape in which a plurality of patterns including the first pattern 211 and the second pattern 212 are connected to each other. have. In detail, the plurality of patterns including the first pattern 211 and the second pattern 212 may be connected to each other to have a mesh shape.

The distance D2 between the first pattern 211 and the second pattern 212 may be 2 mm or less. For example, the distance D2 between the first pattern 211 and the second pattern 212 may be 3 to 2 mm.

If the distance D2 between the first pattern 211 and the second pattern 212 exceeds 2 mm, it may be difficult to form a plurality of patterns in the ineffective area UA of the substrate 100 have.

That is, the soft substrate 100 may include a first region 1A in which a pattern is disposed and a second region 2A in which the soft substrate 100 is exposed. Since the second region 2A does not include a resin layer made of an organic material on the flexible substrate 100, the color of the deposition layer can be transmitted to the user without being distorted.

The first region 1A and the second region 2A may be alternately arranged on the ineffective region UA of the soft substrate 100. [ Accordingly, the bezel area of the folder cover window can realize various colors. For example, when the user views the folder block window from the front and from the side, the light reflection characteristic and / or the light refraction characteristic can be changed, thereby realizing a multicolor bezel area. The first region 1A may have an area corresponding to or different from that of the second region 2A. For example, the area of the first area 1A may be smaller than the area of the second area 2A. For example, the area of the first area 1A may be larger than the area of the second area 2A. For example, the area of the first area 1A may correspond to the area of the second area 2A.

The pattern layer 210 may be partially disposed on the ineffective area UA of the soft substrate 100. Accordingly, the area of the pattern layer 210 may be smaller than the area of the non-effective area UA.

The pattern layer 210 may include a photosensitive material. For example, the pattern layer 210 may include a photosensitive resin. Since the pattern layer 210 includes a photosensitive material having a low viscosity, the pattern layer 210 may be formed to have a slim thickness than that of a pattern layer formed of UV resin.

The pattern layer 210 may be transparent. For example, the pattern layer 210 may comprise a transparent UV resin.

The thickness (T) of the pattern layer 210 may be 2 탆 to 15 탆. For example, the thickness T of the pattern layer 210 may be 5 占 퐉 or less. For example, the thickness (T) of the pattern layer 210 may be 1 탆 to 3 탆.

When the thickness T of the pattern layer 210 is 15 占 퐉 or more, the thickness of the folder cover window may be increased. As a result, the flexibility of the foldable cover window can be reduced.

Meanwhile, the pattern layer 210 may have various shapes. At least one pattern of the first pattern 211 and the second pattern 212 may have a tilt angle? Of 90 degrees or less between the one side surface and the soft substrate 100.

For example, referring to FIG. 19H, at least one of the first pattern 211 and the second pattern 212 may have a sloping angle &thetas; of less than 90 degrees between the one side surface and the soft substrate 100 . ≪ / RTI > Accordingly, at least one of the first pattern 211 and the second pattern 212 may have a trapezoidal shape. For example, referring to FIG. 19G, at least one of the first pattern 211 and the second pattern 212 may have a slope angle? Of 90 degrees or more, It may have an angle similar to this. Accordingly, at least one of the first pattern 211 and the second pattern 212 may have a rectangular shape.

The first pattern 211 and the second pattern 212 may correspond to each other or may have different sizes.

The deposition layer 220 may be disposed on the pattern layer 210.

The deposition layer 220 is disposed on the ineffective area UA of the soft substrate 100 and the deposition layer 220 is formed on the first area 1A and the second area 2A as a whole . Accordingly, the deposition layer 220 may be disposed on the soft substrate 100 while covering the pattern layer 210.

For example, the pattern layer 210, the deposition layer 220, and the shielding layer 230 may be sequentially disposed on the soft substrate 100 in the first region 1A. The lower surface of the pattern layer 210 in the first region 2A is in contact with the soft substrate 100 and both side surfaces and the upper surface of the pattern layer 210 are in direct contact with the deposition layer 220 have.

For example, the deposition layer 220 and the shielding layer 230 may be sequentially disposed on the soft substrate 100 in the second region 2A.

In the second region 2A, the soft substrate 100 and the deposition layer 220 may be in direct contact with each other.

In addition, the refractive indexes of the first region 1A and the second region 2A may be different from each other. For example, the refractive index of the first region 1A may be greater than that of the second region 2A, because the first region 1A includes the pattern layer 210.

The deposition layer 220 may be disposed on the soft substrate 100 to a thickness smaller than the pattern layer 210. For example, the deposition layer 220 may be disposed on the soft substrate 100 to a thickness of 1/15 or less of the pattern layer 210. For example, the deposition layer 220 may be disposed on the substrate with a thickness of 1/20 or less of the pattern layer 210.

The deposition layer 220 may have a thickness of 1 mu m or less.

The deposition layer 220 may be disposed in a shape corresponding to the pattern layer 210. For example, the deposition layer 220 may be disposed on the soft substrate 100 with a thickness smaller than that of the pattern layer 210 by sputtering and corresponding to the pattern layer 210 .

That is, in the first region 1A, the deposition layer 220 covers the side surfaces and the upper surface of the pattern, so that it can be bent. For example, in the first region 1A, the deposition layer 220 may be spaced apart from the soft substrate 100 by a thickness T of the pattern.

The deposition layer 220 may be one of a transparent material and a semitransparent material. Since the deposition layer 220 includes one of a transparent material and a semitransparent material, the deposition layer 220 can realize a metallic color such as gold and silver in addition to black and white, and can display colors such as blue, red, and green .

A shielding layer 230 may be disposed on the deposition layer 220.

The shielding layer 230 may have a larger thickness than the deposition layer 220.

The width W1 of the deposition layer 220 may be smaller than the width W2 of the shield layer 230. [

One end of the deposition layer 220 and the other end opposite to the one end may be disposed on the ineffective area UA. That is, the deposition layer 220 may be disposed only in the ineffective region.

One end of the shielding layer 230 is disposed on the ineffective area UA and the other end opposite to the one end of the shielding layer 230 can be disposed on the effective area AA. That is, the shielding layer 220 can penetrate one of the ineffective area and the effective area. Accordingly, the area of the shielding layer 230 may be larger than the area of the deposition layer 220.

The area of the shielding layer 230 may be larger than the area of the pattern layer 210.

The shielding layer 230 may include one of a transparent material and a semitransparent material.

The shielding layer 230 may have a color suitable for a desired appearance, and may include black or white pigment, for example, black or white pigment. Or a film or the like can be used to realize various color colors such as white or black, red, and blue.

The shielding layer 230 may be formed of a film. Accordingly, when the flexible substrate 100 is flexible or includes a curved surface, the shielding layer can be easily disposed on one surface of the flexible substrate 100. Also, it is possible to prevent de-filming of the shielding layer 230, thereby improving the reliability of the foldable cover window. In addition, a desired logo or the like may be formed on the shielding layer 230 by various methods. Such a shielding layer can be formed by vapor deposition, printing, wet coating or the like.

At this time, the shielding layer 230 may have a thickness of 1 to 20 mu m.

7 to 18, the planarization layer 300 may be disposed on at least one surface of the decor layer 200 and on the effective area of the soft substrate 100. The planarization layer 300 may be disposed on the effective area and the non-effective area while covering one side surface and the bottom surface of the decor layer 200. Accordingly, the planarization layer 300 can remove a step that may occur as the decor layer 200 is partially disposed in the ineffective area. In detail, the planarization layer 300 is disposed between the soft substrate 100 and the polarizing layer 400 and between the decorating layer 200 and the polarizing layer 400, so that the step can be removed .

That is, the lower surface of the planarization layer 300 may be planar or substantially planar. Accordingly, even when the polarizing layer 400 is formed to be thin as the coating layer on the planarizing layer 300, the light leakage phenomenon due to the step difference can be prevented, and the reliability of the foldable cover window can be improved.

The polarizing layer 400 may be disposed on the planarization layer 300. The polarizing layer 400 may be disposed on the effective region and the non-active region of the planarization layer 300. The polarizing layer 400 may have no difference in height between the effective region and the non-effective region, or may be 1 mu m or less, thereby preventing deterioration of the polarization function due to the step difference.

An electrode layer 500 may be disposed on the polarizing layer 400. The electrode layer 500 may include a touch sensor electrode layer.

In addition, the polarizing layer 400 may protect the electrode layer 500. In detail, the polarizing layer 400 can prevent the electrode from cracking, thereby providing a foldable cover window with improved reliability.

On the other hand, a foldable cover window which is an upper substrate (TF) in a foldable display device includes a flexible substrate including a valid region and a non-valid region; A hard coating layer disposed on one side or both sides of the soft substrate; A decor layer disposed on the ineffective area of the other surface opposite to the one surface of the soft substrate; A planarization layer covering the effective region and the decor layer; And a polarizing layer disposed on the planarizing layer. A display panel 700, which is a lower substrate BF, may be disposed on the adhesive layer of the cover window for the foldable display. At this time, the display panel 700 may be an organic light emitting diode panel.

Referring to FIGS. 8, 11, 14 and 17, the foldable cover window, that is, the upper substrate TF may include an electrode layer 500 and an adhesive layer 600.

Alternatively, the upper substrate TF may include an electrode layer 500 and the lower substrate BF may include an adhesive layer 600 although not shown in the figure.

Referring to FIGS. 9, 12, 15 and 18, the lower substrate BF may include an electrode layer 500 and an adhesive layer 600.

That is, the foldable display device can arrange the electrode layer 500 and the adhesive layer 600 on the upper substrate TF or the lower substrate BF. Accordingly, the electrode layer 500 may be disposed on the polarizing layer 400 or may be disposed on the lower substrate BF.

The second embodiment can prevent exposure of the circuit portion and the like in the ineffective area, prevent the reflection of external light, and prevent the shielding layer and the polarizing layer It is possible to provide a foldable cover window having improved flexibility and a foldable display device including the same. In addition, by disposing the planarization layer between the decor layer and the polarizing layer, the polarizing coating film can be arranged without a step, and polarization deterioration can be prevented. Further, the flattening layer can remove the step of the decor layer, thereby improving the reliability of the electrode layer and improving the adhesive property of the adhesive layer. Accordingly, the foldable cover window can be flexible and the reliability of the foldable display device can be improved.

Referring to Fig. 19, an example of a manufacturing process of the foldable cover window and the foldable display device including the foldable window shown in Fig. 14 will be described in order.

Referring to Fig. 19A, a flexible soft substrate 100 can be prepared. For example, the soft substrate 100 may be a polyimide film.

Referring to FIG. 19B, the hard coating layer 110 may be formed on the soft substrate 100.

Referring to FIG. 19C, a photosensitive material R may be disposed on one surface of the soft substrate 100. The photosensitive material R may be disposed entirely on the effective area AA and the ineffective area UA of the soft substrate 100.

The photosensitive material (R) may include a photosensitive resin which is cured only at a portion irradiated with UV energy. The photosensitive material R may be applied on one side of the soft substrate 100 and then dried. As the photosensitive material R is dried with thermal energy, the solvent can be removed.

The method may further include forming a non-flowing coating film. Accordingly, it is possible to prevent contamination of the other side of the soft substrate of the UV resin, which may occur when the UV resin is coated on one side of the soft substrate to compress the film mask, R, the contamination of the soft substrate due to the flow of the photosensitive material R can be prevented.

Referring to FIG. 19D, a mask M may be disposed on the photosensitive material R and exposed to an ultraviolet ray. At this time, the mask M may be a glass mask having a pattern capable of shielding light on a glass G capable of transmitting light. By using the glass mask in the exposure step, it is possible to minimize the dimensional deformation amount of the mask itself and improve the alignment accuracy of the pattern layer formed through the exposure process. The mask M may be disposed in close contact with the photosensitive material. Alternatively, the mask M may be disposed apart from the photosensitive material. For example, the mask M may be spaced apart from the photosensitive material by 0.4 mm or less. When the mask M is separated from the photosensitive material by a distance exceeding 0.4 mm, the alignment accuracy of the pattern layer formed by the exposure and development steps may be reduced.

Referring to FIG. 19E, a development step of removing the non-exposed photosensitive material may be performed. A photosensitive material that is not exposed to ultraviolet rays may be disposed on the entire area of the effective area AA and one area of the non-valid area UA. As the photosensitive material not exposed to ultraviolet rays is removed using an alkali solution, the photosensitive material exposed to ultraviolet rays can be disposed discontinuously on the ineffective area of the soft substrate. In detail, the unexposed photosensitive material can be completely removed on the flexible substrate 100. Accordingly, the area of the exposed photosensitive material may be smaller than the area of the non-effective area UA.

Thereafter, when the exposed photosensitive material is cured, a pattern layer can be formed. At this time, the exposed photosensitive material can be cured by heat, so that the adhesion of the pattern layer to the soft substrate can be improved.

The pattern layer 210 may be selectively formed only on the inactive area UA depending on the arrangement of the mask M.

Referring to FIG. 19F, the deposition material D may be disposed on one surface of the soft substrate on which the pattern layer is formed. The deposition material (D) may be disposed on one side of the soft substrate while covering the pattern layer as a whole. The deposition material (D) may be disposed entirely on the effective area and the non-effective area of the soft substrate.

Referring to FIG. 19G, a shielding layer 230 may be formed on the deposition material. The shielding layer 230 may be wider than the area of the inactive region UA. That is, one end of the shielding layer 230 may be disposed in the effective area AA. The width W3 of the shielding layer 230 disposed in the effective area AA may be 5 mm or less. If the width W3 of the shielding layer 230 disposed in the effective area AA is more than 5 mm, the display area can be reduced.

Referring to FIG. 19H, the deposition layer 220 can be formed by removing the deposition material on the effective area AA. The area of the deposition layer 220 may be smaller than that of the shielding layer 230.

That is, in order to form a decor layer having various colors or metallic colors, a plurality of patterns are partially formed in one area on the ineffective area UA, and the one area and the other area on the ineffective area UA The pattern layer is opened and the soft substrate can be exposed. Thus, since the UV pattern layer is formed entirely in the ineffective area UA, the problem of distortion of the color of the vapor deposition layer as a whole can be solved. In detail, as the embodiment completely removes the non-light-sensitive photosensitive material from the soft substrate 100, the original color of the deposition layer 220 may appear, and the user may transmit a clear color. Further, the UV resin is not disposed on the portion having no pattern shape, and as the flexible substrate 100 is exposed, the thickness of the entire pattern layer 210 can be reduced.

19I, a decor layer 200 may be formed on a non-effective area of the soft substrate 100, and then the planarization layer 300 may be disposed on the effective area and the non-effective area. At this time, the planarization layer 300 may be disposed to a greater thickness than the decor layer 200, and may be disposed on the flexible substrate 100 while surrounding the decor layer 200.

The lower surface of the planarization layer 300 may have a shape close to a plane.

Referring to FIG. 19J, a polarizing layer 400 may be disposed on the planarization layer 300. The polarizing layer 400 may be directly disposed on the planarization layer 300 by spin coating, slit coating, doctor blade coating, roll coating, or the like.

Referring to FIG. 19K, the electrode layer 500 may be disposed on the polarizing layer 400. The electrode layer 500 may be disposed directly on the polarizing layer 400 without any additional description.

The electrode layer 500 may be a touch sensor electrode layer.

The touch sensor electrode layer may include a sensing electrode 510 and a wiring electrode 520. The sensing electrode and the wiring electrode can be disposed on the same side of the foldable cover window, thereby reducing the overall thickness. Accordingly, the flexibility of the foldable cover window can be improved.

Referring to FIG. 191, an adhesive layer 600 may be disposed on the electrode layer 500.

Further, a flexible lower substrate BF can be prepared. At this time, the lower substrate BF may be a display panel 700, for example, an organic light emitting diode panel.

Referring to FIG. 19M, a foldable cover window (upper substrate) including the soft substrate, the hard coating layer, the decor layer, the planarization layer, the polarizing layer and the electrode layer may be laminated by a display panel and an adhesive layer. Thus, a foldable display device with improved flexibility and reliability can be manufactured.

20 and 22, the position of the decor layer on the foldable cover window and the structure of the electrode layer will be described.

Referring to FIG. 20, the sensing electrode 510 may be disposed on the flexible substrate 100. For example, the sensing electrode 510 may be disposed on the effective area AA of the soft substrate 100.

The sensing electrode 510 may include a first sensing electrode 511 and a second sensing electrode 512. The first sensing electrode 511 and the second sensing electrode 512 extend in different directions and may be disposed on the flexible substrate 100.

The first sensing electrode 511 may extend in one direction on the effective area AA of the soft substrate 100. In detail, the first sensing electrode 511 may be disposed on one side of the flexible substrate 100.

The second sensing electrode 512 may be disposed on one side of the flexible substrate 100 while extending in a direction different from the first direction on the effective area AA of the flexible substrate 100. That is, the first sensing electrode 511 and the second sensing electrode 512 may extend in different directions on the same surface of the soft substrate 100.

The first sensing electrode 511 and the second sensing electrode 512 may be insulated from each other on the flexible substrate 100. The plurality of first unit sensing electrodes constituting the first sensing electrode 511 are connected to each other and the plurality of second unit sensing electrodes constituting the second sensing electrode 512 are spaced apart from each other . The second unit sensing electrodes are connected by a bridge electrode 530 and an insulating material 550 is disposed on a portion where the bridge electrode 203 is disposed so that the first sensing electrode 511 and the second sensing The electrodes 512 may be shorted to each other. Accordingly, the first sensing electrode 511 and the second sensing electrode 512 do not contact with each other but are disposed on the same surface of the soft substrate 100, that is, on the same surface of the effective area AA, .

Also, at least one of the sensing electrode 510 and the wiring electrode 520 may be arranged in a mesh shape.

In detail, the first sensing electrode 511 and the second sensing electrode 512 may include a plurality of sub-electrodes, and the sub-electrodes may be arranged to intersect with each other in a mesh shape.

In detail, the first sensing electrode 511 and the second sensing electrode 512 are connected to the mesh line LA and the mesh opening LA between the mesh line LA by a plurality of sub- OA).

The line width of the mesh line LA may be about 0.1 mu m to about 10 mu m. If the line width of the mesh line LA is less than about 0.1 mu m, the mesh line portion may not be formed in the manufacturing process or may short-circuit the mesh line. If the line width exceeds about 10 mu m, the electrode pattern may be visually recognized from the outside, have. Preferably, the line width of the mesh line LA may be about 0.5 mu m to about 7 mu m. More preferably, the linewidth of the mesh wire may be between about 1 [mu] m and about 3.5 [mu] m.

The thickness of the mesh line LA may be about 100 nm to about 500 nm. If the thickness of the mesh line LA is less than about 100 nm, the mesh line portion may not be formed in a manufacturing process or a short circuit may occur. If the thickness of the mesh line LA is more than about 500 nm, the flexible or ben double characteristic may be deteriorated. Preferably, the thickness of the mesh line LA may be about 150 nm to about 250 nm. More preferably, the thickness of the mesh line LA may be about 180 nm to about 200 nm.

In addition, the mesh opening may be formed in various shapes. For example, the mesh opening OA may have various shapes such as a square, a diamond, a pentagon, a hexagon, a polygonal shape, or a circular shape. Further, the mesh opening may be formed in a regular shape or a random shape.

For example, referring to FIG. 21, the sensing electrode 510 and the wiring electrode 520 may all be mesh-shaped. Thus, it is possible to have a flexible characteristic in the valid region and the non-valid region.

The structure of the electrode layers in FIGS. 20 and 21 is only an example, and it is needless to say that the electrode layers can be arranged in various shapes and various positions in a thickness range of 15 to 30 .mu.m.

Referring to FIG. 22, a decor layer 200 may be disposed on the soft substrate 100. For example, the decor layer 200 may be disposed on the ineffective area UA of the soft substrate 100.

In the first and second embodiments, the decor layer 200 may include a shielding layer that has a color and does not transmit light. Accordingly, the decoupling layer 200 can prevent the wiring electrodes disposed on the ineffective area UA and the printed circuit board connecting the wiring electrodes to external circuits from being seen from the outside.

The above-described foldable cover window can be applied to a foldable display device in combination with an organic light emitting diode panel.

Referring to FIG. 23, the foldable cover window TF according to the embodiment may include an electrode layer 500 disposed on the display panel 700. FIG.

23, the foldable display device may be formed by coupling the flexible substrate 100 and the lower substrate BF. The soft substrate 100 and the lower substrate BF may be bonded to each other through an adhesive layer 600. For example, the flexible substrate 100 and the display panel 700 may be bonded to each other through an adhesive layer 600 including an optical transparent adhesive (OCA, OCR).

The lower substrate BF may include a first substrate 710 and a second substrate 720.

The lower substrate BF may be an organic light emitting diode panel. Thus, the flexibility of the display device can be improved. At this time, the display panel 700 includes a self-luminous element that does not require a separate light source. In the display panel 700, a thin film transistor is formed on a first substrate 710, and an organic light emitting element that is in contact with the thin film transistor is formed. The organic light emitting device may include an anode, a cathode, and an organic light emitting layer formed between the anode and the cathode. The organic light emitting device may further include a second substrate 720 serving as an encapsulation substrate for encapsulation.

Referring to FIG. 24, the foldable display device according to the embodiment may include a foldable cover window formed integrally with the lower substrate BF.

That is, the substrate supporting at least one sensing electrode may be omitted. In detail, at least one sensing electrode may be disposed on at least one surface of the display panel 700. That is, at least one sensing electrode may be formed on at least one surface of the first substrate 710 or the second substrate 720.

At this time, at least one sensing electrode may be formed on the upper surface of the soft substrate 100 disposed at the upper portion.

Referring to FIG. 24, a first sensing electrode 511 may be disposed on one surface of the soft substrate 100. Also, a first wiring connected to the first sensing electrode 511 may be disposed. In addition, a second sensing electrode 512 may be disposed on one surface of the display panel 700. In addition, a second wiring connected to the second sensing electrode 512 may be disposed.

An adhesive layer 600 may be disposed between the soft substrate 100 and the display panel 700 so that the soft substrate and the display panel 700 may be bonded to each other.

Further, the flexible substrate 100 may further include a polarizer. For example, the soft substrate 100 may further include an external light reflection preventing polarizer.

The foldable display device according to the embodiment may omit at least one soft substrate supporting the sensing electrode. As a result, a foldable display device having a thin thickness and improved flexibility can be formed.

Referring to FIG. 25, the foldable display device according to the embodiment may include a foldable cover window formed integrally with the lower substrate BF.

That is, the soft substrate supporting the at least one sensing electrode may be omitted.

For example, a sensing electrode disposed in the effective area and serving as a sensor for sensing a touch and a wiring for applying an electrical signal to the sensing electrode may be formed on the inner side of the lower substrate BF. In detail, at least one sensing electrode or at least one wiring may be formed inside the display panel.

The lower substrate BF includes a first substrate 710 and a second substrate 720. At this time, at least one of the first sensing electrode 511 and the second sensing electrode 512 is disposed between the first substrate 710 and the second substrate 720. That is, at least one sensing electrode may be disposed on at least one surface of the first substrate 710 or the second substrate 720.

Referring to FIG. 25, a first sensing electrode 511 may be disposed on one surface of the soft substrate 100. Also, a first wiring connected to the first sensing electrode 511 may be disposed. Further, a second sensing electrode 512 and a second wiring may be formed between the first substrate 710 and the second substrate 720. That is, the second sensing electrode 512 and the second wiring are disposed inside the display panel 700, and the first sensing electrode 511 and the first wiring may be disposed outside the display panel 700 have.

The second sensing electrode 512 and the second wiring may be disposed on the upper surface of the first substrate 710 or the rear surface of the second substrate 720.

Further, the flexible substrate 100 may further include a polarizer.

When the second sensing electrode is formed on the upper surface of the first substrate 710, the second sensing electrode may be formed with a thin film transistor or an organic light emitting device.

The foldable display device according to the embodiment may omit at least one soft substrate supporting the sensing electrode. As a result, a foldable display device having a thin thickness and improved flexibility can be formed. In addition, the sensing electrodes and the wiring are formed together with the elements formed on the lower substrate, thereby simplifying the process and reducing the cost.

23 to 25 do not show the undercoat layer, the decor layer, the planarization layer, and the polarizing layer, but it is needless to say that the folder cover window TF may include the same.

Next, with reference to Figs. 26A to 26C, an example of various device devices to which the foldable display device according to the embodiment is applied will be described. Fig.

26A to 26C, the folder-type display device can fold the folder-cover window.

For example, a foldable display device may be included in a variety of portable electronic products. In detail, the folder-type display device can be included in a mobile terminal (mobile phone), a notebook (portable computer), and the like. Accordingly, while the display area of the portable electronic product is large, it is possible to reduce the size of the device when storing or moving the portable electronic device, thereby increasing the portability. Therefore, the convenience of the user of the portable electronic device can be improved. However, the embodiment is not limited thereto, and it goes without saying that the folder-type display device can be used for various electronic products.

Referring to FIG. 26A, the foldable display device may include one folded region in the effective region. For example, the foldable display device may have a C-shape in a folded configuration. That is, the folder-type display device may have one end and the other end opposite to the end. At this time, the one end and the other end may be disposed close to each other. For example, the one end and the other end may be disposed facing each other.

Referring to FIG. 26B, the foldable display device may include two folding regions in the effective region. For example, the foldable display device may have a G shape in a folded form. That is, the foldable display device can be superposed on each other as the one end and the other end opposite to the one end are folded in the directions corresponding to each other. At this time, the one end and the other end may be spaced apart from each other. For example, the one end and the other end may be arranged parallel to each other.

Referring to FIG. 26C, the foldable display device may include two folding regions in the effective region. For example, the foldable display device may have an S-shaped configuration in a folded configuration. That is, the folder-type display device can be folded at one end and the other end opposite to the one end in different directions. At this time, the one end and the other end may be spaced apart from each other. For example, the one end and the other end may be arranged parallel to each other.

The features, structures, effects and the like described in the foregoing embodiments are included in at least one embodiment of the present invention and are not necessarily limited to one embodiment. Further, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified in other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the present invention. It can be seen that various modifications and applications are possible. For example, each component specifically shown in the embodiments may be modified and implemented. It is to be understood that the present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof.

Claims (16)

A soft substrate comprising a valid region and a non-valid region;
A hard coating layer on one side of the soft substrate;
A decor layer disposed on the ineffective area of the other surface opposite to the one surface;
A planarization layer disposed on the other surface and covering the effective region and the decor layer; And
And a polarizing layer disposed on the planarizing layer. The method according to claim 1,
Wherein the hard coat layer comprises a first hard coat layer and a second hard coat layer,
The first hard coating layer is disposed on one surface of the soft substrate,
And wherein the second hard coating layer is disposed between the soft substrate and the planarization layer. The method according to claim 1,
Wherein the soft substrate has a thickness of 30 占 퐉 to 70 占 퐉. The method according to claim 1,
Wherein the decor layer comprises a shielding layer. The method according to claim 1,
Wherein the decor layer comprises a pattern layer, a deposition layer, and a shielding layer. The method according to claim 4 or 5,
Wherein the shielding layer comprises a thickness of 1 占 퐉 to 20 占 퐉. The method according to claim 1,
Wherein the planarizing layer comprises a thickness of 10 [mu] m to 30 [mu] m. The method according to claim 1,
Further comprising an electrode layer disposed on the polarizing layer. The method according to claim 1,
Wherein the difference between the thickness of the decor layer and the planarization layer on the ineffective area and the thickness of the planarization layer on the effective area is 0.1 占 퐉 to 1 占 퐉. The method according to claim 1,
Wherein the polarizing layer has a thickness of 1 占 퐉 to 5 占 퐉. A soft substrate comprising a valid region and a non-valid region;
A hard coating layer disposed on one surface of the soft substrate;
A polarizing layer on the other surface opposite to one surface of the soft substrate;
A decor layer disposed on the ineffective area of the polarizing layer; And
And a planarization layer disposed on the polarizing layer and covering the effective area and the decor layer. 12. The method of claim 11,
Wherein the hard coat layer comprises a first hard coat layer and a second hard coat layer,
The first hard coating layer is disposed on one surface of the soft substrate,
And the second hard coating layer is disposed between the soft substrate and the polarizing layer. 12. The method of claim 11,
Wherein the decor layer comprises a shielding layer. 12. The method of claim 11,
Further comprising an electrode layer disposed on the planarization layer. A soft substrate comprising a valid region and a non-valid region;
A hard coating layer on one side of the soft substrate;
A decor layer disposed on the ineffective area of the other surface opposite to the one surface;
A planarization layer disposed on the other surface and covering the effective region and the decor layer; A polarizing layer disposed on the planarization layer; And
A cover window for a foldable display including an adhesive layer on the polarizing layer, and
And a display panel disposed on the adhesive layer of the cover window for the foldable display. 16. The method of claim 15,
Wherein the foldable display device further comprises a touch sensor electrode layer,
Wherein the touch sensor electrode layer is disposed on the polarizing layer or on the display panel.

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