TWI633470B - Foldable touch display apparatus and touch apparatus thereof - Google Patents

Abstract

A foldable touch device includes a light-transmissive cover plate and a touch sensing layer. The elastic modulus of the transparent cover is between 3 MPa and 10 MPa. The touch-sensitive layer is covered by a light-transmissive cover, wherein the touch-sensitive layer is foldable.

Description

Foldable touch display device and touch device

The present invention relates to a touch device, and more particularly, to a foldable touch device and a foldable touch display device having the same.

With the advancement of technology, Jufan has widely adopted portable electronic products such as smart phones, notebook computers, and tablet computers as touch screens for users. With the development of display technology, currently foldable display modules have been developed. Due to the large bending radius of current touch devices, the bending resistance is poor, and creases will appear after bending many times, which affects their normal use. Therefore, it is difficult to apply touch devices to foldable display modules. .

The foldable touch device disclosed in the embodiments of the present invention utilizes a light-transmitting cover with a small bending radius and good bending resistance to cover the foldable touch sensing layer, thereby helping to fold the foldable touch sensing layer. The touch device is applied to a foldable display module.

In some embodiments of the present invention, a foldable touch device includes a transparent cover and a touch sensing layer. The elastic modulus of the transparent cover is between 3 MPa and 10 MPa. The touch-sensitive layer is covered by a light-transmissive cover, wherein the touch-sensitive layer is foldable.

In some embodiments of the present invention, the elongation of the transparent cover plate is greater than 85%.

In some embodiments of the present invention, the tensile strength of the transparent cover is greater than 85 kilogram-forces per square meter (kgf / m ² ).

In some embodiments of the present invention, the compression deformation rate of the light-transmissive cover is less than 9%.

In some embodiments of the present invention, the elongation of the light-transmitting cover is greater than 85%, the tensile strength of the light-transmitting cover is greater than 85 kilogram-forces per square meter (kgf / m ² ), and the light-transmitting cover is compressed. The deformation rate is less than 9%.

In some embodiments of the present invention, the light-transmitting cover is made of silicon rubber.

In some embodiments of the present invention, the light-transmitting cover plate includes an inner surface and an outer surface opposite to each other, and the touch sensing layer is located on the inner surface of the light-transmitting cover plate. The foldable touch device further includes a functional layer . The functional layer is located on the outer surface of the transparent cover. The functional layer has an outer surface far from the light-transmissive cover plate, and the roughness of the outer surface of the functional layer is lower than that of the outer surface of the light-transmissive cover plate.

In some embodiments of the invention, the flat layer includes a fluorocarbon-based material.

In some embodiments of the present invention, the outer surface of the light-transmissive cover plate includes silicon rubber.

In some embodiments of the present invention, the foldable touch device further includes a fluorine-containing hydrocarbon material layer. The light-transmissive cover plate is covered by a fluorocarbon-based material layer, and the light-transmissive cover plate has a surface adjacent to the fluorocarbon-based material layer, and the surface adjacent to the fluorocarbon-based material layer is composed of silicone rubber.

In some embodiments of the present invention, the light-transmissive cover plate includes a silicone rubber surface. The touch sensing layer is at least partially attached to a display area on the inner surface of the silicone rubber.

In some embodiments of the present invention, the foldable touch device further includes a light shielding layer. The light-shielding layer is attached to a non-display area on the inner surface of the silicone rubber. This non-display area is not attached by the touch sensing layer.

In some embodiments of the present invention, a foldable touch device includes a silicone rubber object and a touch sensing layer. The touch sensing layer is covered by a silicone rubber object. The touch-sensitive layer is foldable.

In some embodiments of the invention, the touch sensing layer includes a metal grid, nano-silver wires, graphene, or carbon nanotubes.

In some embodiments of the present invention, the thickness of the silicone rubber is between 50 microns and 300 microns.

In some embodiments of the present invention, a foldable touch display device includes a foldable touch device as described above, a foldable display module, and a foldable adhesive layer. The foldable adhesive layer adheres the foldable touch device and the foldable display module.

In the above embodiments, since the elastic modulus of the light-transmitting cover plate (or silicone rubber object) is not greater than 10 MPa, the light-transmitting cover plate is more likely to be bent to generate a larger size when it is subjected to the force of being bent. Elastic deformation. So this bomb The elastic modulus helps the light-transmissive cover to be folded. Further, the elastic modulus can help to fold the transparent cover into a folded state with a small bending radius. In addition, this elastic modulus can also help improve the bending resistance of the transparent cover. Therefore, when the light-transmissive cover plate with the elastic modulus and the foldable touch sensing layer together form a touch device, the touch device can have good foldable characteristics, which is helpful to be applied to a foldable display mode. Group. In addition, since the elastic modulus of the light-transmitting cover is not less than 3 MPa, the light-transmitting cover may have a certain hardness to maintain the overall shape of the touch device. That is to say, the elastic modulus between 3 MPa and 10 MPa can have both "fold the transparent cover into a folded state with a small bending radius" and "improve the bending resistance of the transparent cover ", And" make the light-transmissive cover plate sufficiently hard to maintain the overall shape of the touch device "and other advantages.

The above is only used to explain the problems that can be solved by the present invention, the technical means for solving the problems, and the effects produced by them, etc. The specific details of the present invention will be described in detail in the following embodiments and related drawings.

100‧‧‧Translucent cover

110‧‧‧Inner surface

120‧‧‧ outer surface

200‧‧‧ touch sensing layer

210‧‧‧electrode area

220‧‧‧ Routing Area

300‧‧‧ shading layer

400‧‧‧first optical adhesive layer

500‧‧‧ Foldable Display Module

600‧‧‧functional layer

620‧‧‧outer surface

700‧‧‧second optical adhesive layer

810‧‧‧First touch sensing layer

820‧‧‧Second touch sensing layer

900‧‧‧Translucent sheet

910‧‧‧First surface

920‧‧‧Second surface

A1, A2‧‧‧arrow

In order to make the above and other objects, features, advantages, and embodiments of the present invention more comprehensible, the description of the drawings is as follows: FIG. 1 illustrates a foldable touch display device according to an embodiment of the present invention. Sectional schematic diagram; FIG. 2 illustrates a folded state schematic diagram of the foldable touch display device illustrated in FIG. 1; and FIG. 3 illustrates a schematic cross-sectional diagram of a foldable touch display device according to another embodiment of the present invention; as well as FIG. 4 is a schematic cross-sectional view of a foldable touch display device according to another embodiment of the present invention.

In the following, multiple embodiments of the present invention will be disclosed graphically. For the sake of clear description, many practical details will be described in the following description. However, those skilled in the art should understand that in some embodiments of the present invention, these practical details are not necessary, and therefore should not be used to limit the present invention. In addition, in order to simplify the drawings, some conventional structures and components will be shown in the drawings in a simple and schematic manner. In addition, for the convenience of the reader, the dimensions of the elements in the drawings are not drawn according to actual proportions.

FIG. 1 is a schematic cross-sectional view of a foldable touch display device according to an embodiment of the present invention. As shown in FIG. 1, the foldable touch display device includes a light-transmissive cover 100, a touch-sensing layer 200, a light-shielding layer 300, a first optical adhesive layer 400, and a foldable display module 500. The board 100, the touch sensing layer 200, and the light shielding layer 300 may be collectively referred to as a foldable touch device. The transparent cover 100 may include an inner surface 110 and an outer surface 120. The inner surface 110 is opposite to the outer surface 120. The outer surface 120 can be used as a touch surface of a user. The touch-sensitive layer 200 is at least partially disposed on the display area (or visible area) of the inner surface 110, and the light-shielding layer 300 is provided on the inner surface 110 of the non-display area (or non-display area) to which the touch-sensitive layer 200 is not attached. Visible area) to shield opaque wires. The touch sensing layer 200 and the foldable display module 500 are adhered by the first optical adhesive layer 400. In other words, the first optical adhesive layer 400 is sandwiched between the touch sensing layer 200 and the foldable display module. Between 500, the touch sensing layer 200 and the foldable display module 500 are fixed by the adhesive ability of the first optical adhesive layer 400.

When the transparent cover plate is made of a traditional cover material such as glass, since the glass does not have a flexible property, the transparent cover plate cannot be folded with the foldable display module 500 below. When the transparent cover is made of flexible materials such as polyethylene terephthalate (PET), polyimide (PI) or Cyclo olefin polymer (COP), The light-transmissive cover can be folded together with the foldable display module 500 below, but this kind of flexible material has a large bending radius (for example, the bending radius is greater than 3 mm), and has poor resistance to bending (for example, : It is difficult to reach more than 100,000 times).

Therefore, some embodiments of the present invention use silicone rubber to form the light-transmissive cover 100. In other words, the light-transmitting cover 100 is made of silicone rubber, and can also be called a silicone rubber object. Because silicone rubber has a spiral molecular structure, its intermolecular force is small, so it can have a low elastic modulus. For example, the elastic modulus of the transparent cover 100 made of silicone rubber can be between 3 MPa and 10 MPa. In some embodiments, such an elastic modulus can be achieved by adjusting the ratio of the components of the silicone rubber (for example, silicon, carbon, hydrogen, and oxygen). Compared with the transparent cover made of materials such as PET, PI, or COP, the elastic modulus of the transparent cover 100 made of silicone rubber is not greater than 10 MPa, and this elastic modulus is sufficiently small. . Therefore, when the light-transmitting cover plate 100 is subjected to the force of being bent, it is easier to be bent to produce a large elastic deformation, and it can be smoothly bent into a folded state as shown in FIG. 2. In addition, such an elastic modulus can also help improve the bending resistance of the transparent cover 100. force. For example, the light-transmissive cover 100 having the above-mentioned elastic modulus can withstand 200,000 folds, so its bending resistance is obviously better than the light-transmissive cover made of materials such as PET, PI, or COP. In addition, the elastic modulus of the transparent cover 100 made of silicon rubber is not less than 3 MPa, so the transparent cover 100 made of silicon rubber can have a certain hardness to maintain the overall shape of the touch device. That is to say, the elastic modulus of silicone rubber can not only help to fold the transparent cover 100 into a folded state with a small bending radius and improve the bending resistance of the transparent cover 100, but also help to make the transparent cover The board 100 has sufficient rigidity to maintain the overall shape of the touch device.

In addition, the above-mentioned elastic modulus can also help to fold the transparent cover 100 into a folded state with a small bending radius. For example, when the touch display device is folded to the opposite state as shown in FIG. 2 (that is, the folded transparent cover 100 is located inside the foldable display module 500), the transparent cover The bend radius of 100 can reach a minimum of 1 mm. It can be understood here that the touch display device shown in FIG. 1 can be folded in the direction of the arrow A1 to the state shown in FIG. 2 (that is, the transparent cover 100 is located in the foldable display module 500. (Outside), or can be folded in a direction opposite to the direction shown in FIG. 2 in the direction of arrow A2 (that is, the transparent cover 100 is located inside the foldable display module 500).

In some embodiments, the stretch ratio of the transparent cover 100 made of silicone rubber is greater than 85%. Such a stretch ratio can help prevent the light-transmitting cover plate 100 from being creased, cracked, or even broken during bending. In some embodiments, the stretch rate of the transparent cover 100 made of silicone rubber is less than 95%. In some embodiments, such an elastic modulus can be achieved by adjusting the ratio of the components of the silicone rubber (for example, silicon, carbon, hydrogen, and oxygen).

In some embodiments, the tensile strength of the transparent cover 100 made of silicone rubber is greater than 85 kilogram-forces per square meter (kgf / m ² ). Such tensile strength can help improve the bending stress that the transparent cover 100 can withstand. That is to say, such tensile strength can help improve the elastic limit of the light-transmitting cover plate 100, so as to help the light-transmitting cover plate 100 to maintain elastic deformation without bending during the bending process. Plastic deformation. In addition, since such a tensile strength can help the light-transmitting cover plate 100 to maintain an elastically deformed state during the bending process, the occurrence of creases can be prevented. In some embodiments, the tensile strength of the transparent cover 100 made of silicone rubber is less than 120 kgf / m 2. In some embodiments, such tensile strength can be achieved by adjusting the ratio of the components of the silicone rubber (for example, silicon, carbon, hydrogen, and oxygen).

In some embodiments, the compression set of the transparent cover 100 made of silicone rubber is less than 9%. Such a compression permanent deformation rate can help improve the rebound ability of the transparent cover plate 100 and prevent permanent deformation of the transparent cover plate 100 due to long-term or repeated repeated folding. In some embodiments, the compression set of the transparent cover 100 made of silicone rubber is greater than 3%. In some embodiments, such an elastic modulus can be achieved by adjusting the ratio of the components of the silicone rubber (for example, silicon, carbon, hydrogen, and oxygen).

When the transmissive cover 100 made of silicone rubber has an elongation of more than 85%, a tensile strength of more than 85 kgf / m2, and a compression set of less than 9%, the translucent cover can be further prevented. 100 produced creases after multiple bends.

In some embodiments, a light transmitting cover made of silicone rubber The thickness of the plate 100 is between 50 microns and 300 microns. This thickness can help improve the light transmittance of the transparent cover 100 made of silicone rubber, and can also reduce the manufacturing difficulty of the transparent cover 100. For example, when the transparent cover 100 made of silicone rubber has the thickness described above, the light transmittance of the transparent cover 100 may be greater than 94%.

In addition to the advantages described above, the use of silicone rubber to form the light-transmissive cover 100 has the following advantages. Since the silicone rubber can be used at 150 ° C for a long time without any change in physical or chemical properties, the silicone rubber can be suitable as a cover for protecting the touch sensing layer 200. In addition, silicone rubber can withstand a high temperature of 200 ° C to 350 ° C. Therefore, silicone rubber can withstand the high-temperature processes used to make the touch-sensing layer 200, such as: splashes between 200 ° C and 260 ° C Plating, developing, or etching processes; coating and laser processes at temperatures between 100 ° C and 200 ° C. In addition, silicon rubber can also withstand the high-temperature processes used to make the light-shielding layer 300, such as printing and baking processes with temperatures between 150 ° C and 180 ° C.

In some embodiments, the viscosity of the silicone rubber is not sufficient to enable the touch-sensing layer 200 to be firmly attached to the silicone rubber. Therefore, the inner surface 110 of the light-transmissive cover plate 100 formed by the silicone rubber can be applied with a specific Treatment (such as plasma plasma treatment) to increase the viscosity of the inner surface 110, thereby facilitating the adhesion of the touch sensing layer 200. It can be understood that, in some embodiments, the outer surface 120 of the transparent cover 100 does not need to adhere to other components. Therefore, the outer surface 120 of the transparent cover 100 may not be treated by the inner surface 110. Therefore, The viscosity of the outer surface 120 and the inner surface 110 of the transparent cover 100 may be different. For example, the inner surface 110 of the transparent cover 100 may be Plasma plasma treatment is applied to increase the viscosity, and the outer surface 120 of the transparent cover plate 100 may not be subjected to plasma plasma treatment. Therefore, the viscosity of the inner surface 110 may be greater than that of the outer surface 120.

It can be understood that although the above-mentioned embodiment uses silicon rubber to form the light-transmissive cover 100, the material of the light-transmissive cover 100 of the present invention is not limited to silicon rubber. In other embodiments, as long as the elastic modulus of the transparent cover 100 is between 3 MPa and 10 MPa, the transparent cover 100 may be made of other materials.

In some embodiments, when the transparent cover 100 is made of silicone rubber, the inner surface 110 and the outer surface 120 of the transparent cover 100 may also be referred to as a silicone rubber inner surface and a silicone rubber outer surface, respectively. The touch sensing layer 200 is at least partially disposed on a display area of the inner surface of the silicone rubber. The touch sensing layer 200 is foldable to facilitate folding with the transparent cover 100 and the foldable display module 500. Further, the touch sensing layer 200 may include a sensing electrode region 210 and a wiring region 220. The routing area 220 surrounds the electrode area 210 or is located at least on one side of the electrode area 210. The electrode region 210 is a display region disposed on the inner surface 110 of the transparent cover 100, and the electrode region 210 may include a plurality of sensing electrodes therein. The routing area 220 is disposed on the light shielding layer 300 in the non-display area of the inner surface 110 of the transparent cover 100. The sensing electrode in the electrode region 210 is foldable. Of course, in some embodiments, the conductive elements (such as wires) in the routing area 220 are also foldable.

It can be understood that a typical sensing electrode is composed of a transparent metal oxide such as indium tin oxide (ITO) or indium zinc oxide (IZO). However, the sensing electrodes made of such transparent metal oxides are not foldable. Further, by transparent gold After the sensing electrode made of metal oxide is folded, it may cause cracks or fractures, and lose the function of the sensing electrode.

Therefore, in some embodiments, the sensing electrode of the touch sensing layer 200 is made of a flexible conductive material such as metal mesh, silver nano wire (SNW), graphene, or carbon nanotube. Materials, not transparent metal oxides. Because the metal grid, nano-silver graphene, and carbon nanotubes do not lose their own conductive function after being folded, they can help form a foldable sensing electrode and help form a foldable touch. Induction layer 200.

The routing area 220 is covered by the light-shielding layer 300. Therefore, when the user views the touch display device from above the outer surface 120, the routing area 220 can be shielded by the light-shielding layer 300. Therefore, it is not necessary to use the routing area 220. The light-transmitting element, in some embodiments, the routing area 220 may include a plurality of metal wires therein. The material of the metal wires may be copper or silver, but the invention is not limited thereto. The sensing electrodes in the electrode area 210 are electrically connected to the metal wires in the wiring area 220, and the metal wires in the wiring area 220 are electrically connected to the circuit board (not shown in the figure). In some implementations, the routing area 220 may include conductive materials such as nano-silver, metal mesh, or stone millene. Such conductive materials have good bending resistance, and thus may be beneficial to the routing area 220. fold. In this way, when the sensing signal in the electrode area 210 senses the touch signal, the touch signal can be transmitted to the circuit board through the metal wire in the wiring area 220, and then transmitted to the circuit board through the circuit board. Processor (not shown).

In some embodiments, the light-shielding layer 300 is disposed on a non-display area of the inner surface 110 of the silicone rubber of the transparent cover 100. Non-display area The touch sensing layer 200 is attached. The light-shielding layer 300 may be a dark light-shielding layer (such as a black light-shielding layer) or a light-color light-shielding layer (such as a white light-shielding layer) to shield the metal wires in the routing area 220 below it. For example, the material of the light shielding layer 300 may be a dark ink (such as a black ink) or a light ink (such as a white ink). In some embodiments, the light-shielding layer 300 may form a ring-shaped pattern and occupy a ring-shaped region on the outermost side of the inner surface 110 of the transparent cover 100, and the ring-shaped pattern may surround the electrode region 210 of the touch-sensing layer 200.

In some embodiments, the foldable display module 500 may include an organic light emitting diode (Organic Light Emitting Diode; OLED) display panel. For example, the foldable display module 500 may be an Active-Matrix Organic Light-Emitting Diode (AMOLED) display panel. Since the organic light emitting diode display panel has a foldable property, it can be used as a foldable display module 500.

FIG. 3 is a schematic cross-sectional view of a foldable touch display device according to another embodiment of the present invention. As shown in FIG. 3, the main difference between this embodiment and the foldable touch display device shown in FIG. 1 is that this embodiment includes a functional layer 600. The functional layer 600 is disposed on the outer surface 120 of the transparent cover 100. The functional layer 600 may be an anti-fingerprint layer, an explosion-proof layer, an anti-glare layer, a hardened layer, or any combination thereof. In the embodiment in which the transparent cover 100 is made of silicon rubber, the material properties of the silicone rubber can make the surface roughness of the transparent cover 100 high, which results in poor touch of the outer surface 120. That is, when the outer surface 120 of the transparent cover 100 includes silicon rubber, a rough outer surface 120 is formed.

Therefore, the functional layer 600 can be used to improve the user's tactile sensation when touching the touch display device. Further, the functional layer 600 has a surface 620 far from the outer surface of the transparent cover 100. The roughness of the outer surface 620 of the functional layer 600 is lower than the roughness of the outer surface 120 of the transparent cover 100. In this way, when the user touches the outer surface 620 of the functional layer 600, compared to touching the outer surface 120 of the transparent cover plate 100, the user can experience a relatively smooth touch.

In some embodiments, the functional layer 600 may include a fluorocarbon-based material. Such a material may help form the outer surface 620 with low roughness. In other words, the functional layer 600 may also be referred to as a fluorine-containing hydrocarbon material layer, and the light-transmissive cover plate 100 is covered by the fluorine-containing hydrocarbon material layer. The transparent cover 100 has an outer surface 120 adjacent to the fluorocarbon-based material layer, and the outer surface 120 is made of silicone rubber. Therefore, the fluorocarbon-based material layer can improve the touch feeling of the touch display device. It can be understood that, since the fluorocarbon-based material can be used as the material of the anti-fingerprint layer, the functional layer 600 can be used as the anti-fingerprint layer in addition to improving the touch feeling.

FIG. 4 is a schematic cross-sectional view of a foldable touch display device according to another embodiment of the present invention. As shown in FIG. 4, the main difference between this embodiment and the previous embodiment is that this embodiment has a two-layer touch-sensing layer instead of a single-layer touch-sensing layer. Further, the foldable touch display device may include a transparent cover 100, a first optical adhesive layer 400, a foldable display module 500, a second optical adhesive layer 700, a first touch sensing layer 810, a first The two touch the sensing layer 820 and the transparent plate 900. The first touch-sensitive layer 810 and the second touch-sensitive layer 820 are both covered by the light-transmissive cover 100, and the first touch-sensitive layer 810 and the second touch-sensitive layer 820 are respectively disposed on the light-transmitting plate 900. Opposite sides. Further, the light-transmitting sheet 900 The first surface 910 and the second surface 920 are opposite to each other. The first surface 910 is a surface of the transparent plate 900 facing the transparent cover 100, and the second surface 920 is a surface opposite to the first surface 910. The first touch sensing layer 810 is disposed on the first surface 910, and the second touch sensing layer 820 is disposed on the second surface 920. The second optical adhesive layer 700 is adhered to the transparent cover 100 and the first touch sensing layer 810.

In order to facilitate the foldability of the touch display device, the light-transmitting plate 900 may be made of silicon rubber. Like the aforementioned transparent cover 100, in some embodiments, the elastic modulus of the transparent plate 900 made of silicone rubber can be between 3 MPa and 10 MPa; in some embodiments, The tensile rate of the light-transmitting sheet 900 composed of silicone rubber is greater than 85%; in some embodiments, the tensile strength of the light-transmitting sheet 900 composed of silicone rubber is greater than 85 kgf / m2 (kgf / m ² ); In some embodiments, the compression set (compression set) of the light-transmitting plate 900 made of silicone rubber is less than 9%. It can be seen that, in some embodiments, the light-transmissive cover plate 100 and the light-transmissive plate 900 can be made of the same material. The advantages brought by the above properties are as described above, so the description will not be repeated.

In some embodiments, the first touch-sensing layer 810 and the second touch-sensing layer 820 may include a metal grid, nano-silver wire, graphene, or a carbon nanotube. The advantages brought by these materials are as described above. It is not included in the description.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and retouches without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be determined by the scope of the attached patent application.

Claims (15)

A foldable touch device includes: a light-transmissive cover plate, the elastic modulus of the light-transmissive cover plate is between 3 MPa and 10 MPa; and a touch sensing layer, which is Covered by a light-transmissive cover, wherein the touch-sensitive layer is foldable. The foldable touch device according to claim 1, wherein the elongation rate of the transparent cover is greater than 85%. The foldable touch device according to claim 1, wherein the tensile strength of the transparent cover is greater than 85 kilogram-forces per square meter (kgf / m ² ). The foldable touch device according to claim 1, wherein the compression set of the transparent cover is less than 9%. The foldable touch device according to claim 1, wherein the transparent cover is made of silicon rubber. The foldable touch device according to claim 1, wherein the light-transmitting cover plate includes an inner surface and an outer surface opposite to each other, and the touch sensing layer is disposed on the inner surface of the light-transmitting cover plate, wherein The foldable touch device further includes: a functional layer disposed on the outer surface of the transparent cover, wherein the functional layer has an outer surface far from the transparent cover, and the outer surface of the functional layer is The roughness is lower than that of the outer surface of the transparent cover. The foldable touch device according to claim 6, wherein the functional layer includes a fluorocarbon-based material. The foldable touch device according to claim 6, wherein the outer surface of the transparent cover comprises silicon rubber. The foldable touch device according to claim 1, further comprising: a fluorocarbon-based material layer, wherein the light-transmissive cover plate is covered by the fluorocarbon-based material layer, and the light-transmissive cover plate has A surface adjacent to the fluorine-containing hydrocarbon material layer is formed of silicone rubber. The foldable touch device according to claim 1, wherein the light-transmissive cover plate includes a silicon rubber inner surface, and the touch sensing layer is at least partially disposed on a display area of the silicon rubber inner surface. The foldable touch device according to claim 10, further comprising: a light shielding layer disposed on a non-display area of the inner surface of the silicone rubber, and the non-display area is not attached by the touch sensing layer. A foldable touch device includes: a silicone rubber object, the elastic modulus of the silicone rubber object is between 3 MPa and 10 MPa; and a touch sensing layer covered by the silicone rubber object , Wherein the touch sensing layer is foldable. The foldable touch device according to claim 12, wherein the touch sensing layer comprises a metal grid, nano-silver wires, carbon nanotubes, or graphene. The foldable touch device according to claim 12, wherein the thickness of the silicone rubber object is between 50 microns and 300 microns. A foldable touch display device includes: a foldable touch device according to any one of claims 1 to 14; a foldable display module; and an optical adhesive layer to adhere the foldable Touch device and the foldable display module.