TWI832504B - Display panel, electronic device, touch panel and preparation method thereof - Google Patents

Abstract

Embodiments of the present application relate to the field of display technology, and provide a display panel, an electronic device, a touch panel, and a preparation method thereof. The display panel includes a driving substrate and a plurality of light emitting elements electrically connected to the driving substrate. Each light emitting element is a mini light-emitting diode or a micro light-emitting diode, and a pitch of adjacent light-emitting elements is not greater than 50 microns.

Description

Display panel, input device, touch panel and preparation method thereof

The present application relates to the field of display technology, specifically, to a display panel, an input device, a touch panel and a preparation method thereof.

It is known that the applications of micro-sized light-emitting elements (such as mini-light-emitting diodes) mainly include directly serving as display pixels to realize image display and serving as backlight sources for liquid crystal display panels. However, due to technical limitations, conventional micro-sized light-emitting components (such as mini-light-emitting diodes) can only be used in large-sized display panels (such as advertising billboards) directly as display pixels, and the use scenarios are single.

A first aspect of this application provides a display panel. The display panel includes: a driving substrate; and a plurality of light-emitting elements electrically connected to the driving substrate. Each of the light-emitting elements is a mini light-emitting diode or a micro light-emitting diode. , the distance between adjacent light-emitting elements is not greater than 50 microns.

In the display panel of the first aspect of the present application, the distance between two adjacent light-emitting elements is not greater than 50 microns, so that the size of the display panel can be made very small (such as as small as a rectangular screen less than 1cm×1cm). The usage scenarios of micro-sized light-emitting components (mini-LEDs or micro-LEDs) have been expanded. For example, small-sized display panels can be used in smart wearable devices, such as augmented reality (AR) glasses, smart watches, etc. Through Bluetooth or other transmission, users can define the images displayed on the display panel according to their personal needs. picture. Alternatively, a small-sized display panel can be applied to a headset as a display screen of the headset, and the user can define the image displayed on the display screen of the headset according to personal needs. Alternatively, a small-sized display panel can be applied to a keyboard as a keycap, and users can change the image displayed on the keycap according to personal needs.

A second aspect of this application provides an input device. The input device includes: the display panel as described in the first aspect of this application; and a touch panel, where the touch panel and the display panel are stacked.

The input device of the second aspect of the present application includes the above-mentioned display panel. The input device has at least the same advantages as the above-mentioned display panel, which will not be described again here.

A third aspect of the present application provides a touch panel. The touch panel includes: a curved and inflexible base material; and a touch sensing layer, the touch sensing layer is directly formed on the surface of the base material. .

In the touch panel of the third aspect of the present application, the touch sensing layer is directly formed on the curved surface of the base material, instead of the touch sensing layer being first formed on other carrier substrates and then attached to the base material. , thereby reducing the bonding steps, reducing the thickness of the bonding adhesive layer, and simplifying the process; nor is the touch sensing layer first formed on a planar substrate, and then the touch sensing layer is formed on the substrate. Therefore, the touch panel does not need to consider the tensile strength of the base material in the bending step, and the touch electrodes and touch electrodes included in the touch sensing layer in the bending step. / Or the problem of wire breakage improves the product yield. When the touch panel is combined with the display panel of the first aspect, the applications of the display panel can be further expanded. Using scenarios, the above-mentioned display panel has a touch function. Furthermore, when the display panel of the first aspect is a curved display panel, the touch panel can also be combined with the display panel of the first aspect, so that the display panel of the first aspect can be used in a curved touch display device to further expand the above-mentioned display. Panel application scenarios.

A fourth aspect of this application provides an input device. The input device includes: the touch panel as described in the third aspect of this application; and a display panel, the display panel and the touch panel are stacked.

The input device of the fourth aspect of the present application includes the above-mentioned touch panel. The input device has at least the same advantages as the above-mentioned touch panel, which will not be described again here.

A fifth aspect of the present application provides a method for manufacturing a touch panel. The method for manufacturing a touch panel includes: directly forming a touch sensing layer on the surface of a curved and inflexible substrate.

In the preparation method of the touch panel according to the fifth aspect of the present application, the touch sensing layer is directly formed on the curved surface of the substrate, instead of the touch sensing layer being first formed on other carrier substrates and then attached to the base material. On the base material, this reduces the bonding steps, reduces the thickness of the bonding adhesive layer, and simplifies the process; it is not that the touch sensing layer is first formed on the flat base material, and then the touch sensing layer is formed Therefore, the touch panel does not need to consider the tensile strength of the base material in the bending step, and the touch sensing layer included in the bending step. The problem of breakage of electrodes and/or wires is controlled and the yield rate of the product is improved. Moreover, since the preparation method of the touch panel of the fifth aspect facilitates the realization of the curved touch panel, when the display panel of the first aspect is a curved display panel, the curved touch panel can also be combined with the display panel of the first aspect. , the display panel of the first aspect is applied to a curved touch display device, further expanding the application scenarios of the above display panel.

100a, 100b, 100c, 100d, 100e: input device

200:Game controller

10:Display panel

12:Driver substrate

122: Upper hemisphere

124: Lower hemisphere

14:Light-emitting components

142:LED that emits red light

144:LED that emits green light

146:LED that emits blue light

P:pixel

20:Touch panel

22:Substrate

222:The other upper hemisphere

224:The other lower hemisphere

24:Touch sensing layer

30a, 30b: Touch display structure

FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application.

FIG. 2 is a schematic structural diagram of a touch panel according to an embodiment of the present application.

Figure 3 is a schematic structural diagram of an input device according to an embodiment of the present application.

4A to 4E are schematic diagrams of the input device in different application scenarios according to an embodiment of the present application.

5 to 8 are schematic structural diagrams of input devices according to different embodiments of the present application.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments.

FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application. As shown in FIG. 1 , the display panel 10 includes a driving substrate 12 and a plurality of light-emitting elements 14 . The light-emitting element 14 is located on the driving substrate 12 and is electrically connected to the driving substrate 12 . The light-emitting element 14 emits light driven by the driving substrate 12 to display an image.

The light emitting element 14 is a mini light emitting diode (mini LED) or a micro light emitting diode (micro light emitting diode, micro LED). The distance between two adjacent light-emitting elements 14 is no more than 50 microns (for example, 45 microns, 48 microns, 50 microns).

In the display panel of the embodiment of the present application, the distance between two adjacent light-emitting elements is no more than 50 microns, so that the size of the display panel can be made very small (such as a rectangular screen as small as less than 1cm×1cm), and the micro size is expanded. Usage scenarios of light-emitting components (mini light-emitting diodes or micro light-emitting diodes). For example, small-sized display panels can be used in smart wearable devices, such as AR glasses, smart watches, etc. Through Bluetooth or other transmissions, users can define the images displayed on the display panel according to their personal needs. Alternatively, a small-sized display panel can be applied to a headset as a display screen of the headset, and the user can define the image displayed on the display screen of the headset according to personal needs. Alternatively, a small-sized display panel can be applied to a keyboard as a keycap, and users can change the image displayed on the keycap according to personal needs.

It can be understood that the display panel of the embodiment of the present application can also be enlarged in size (such as a rectangular screen as large as 20cm×20cm) and used in notebook computers, mobile phones, tablet computers or advertising billboards. Because the display panel of the embodiment of the present application uses mini LED or micro LED as display pixel points to provide the basic unit of imaging, thereby realizing image display, it has high brightness, wide color gamut, high contrast, high-speed response, low Advantages include power consumption and long life.

In some embodiments, the light-emitting element 14 is a micro LED, and micro LED refers to an LED with a grain size less than 100 microns. In other embodiments, the light-emitting element 14 is a mini LED. Mini LED is also called sub-millimeter light-emitting diode. Its size is between traditional LED and micro LED. It is commonly known that it refers to LED with a grain size of approximately 100 microns to 200 microns.

In some embodiments, the display panel 10 includes light-emitting elements 14 that emit light of different colors. For example, the light-emitting elements 14 that emit light of different colors include LEDs 142 that emit red light, LEDs 144 that emit green light, and LEDs 146 that emit blue light. One LED 142 that emits red light, two LEDs 144 that emits green light, and one LED 146 that emits blue light form a pixel P. The display panel 10 includes a plurality of pixels P arranged in an array, so that the display panel 10 can realize color display. In other embodiments, the light-emitting elements 14 that emit light of different colors are not limited to the above three colors, and the number of the light-emitting elements 14 in each pixel P and the light-emitting type of the light-emitting elements 14 are not limited thereto.

In some embodiments, the driving substrate 12 is curved and inflexible, such as a printed circuit board (PCB). The driving substrate 12 includes, for example, a curved and inflexible base layer (Fig. (not shown) and a driving circuit layer (not shown) located on the base layer. The plurality of light-emitting elements 14 are electrically connected to the driving circuit layer, so as to emit light under the driving of the driving circuit layer.

In the embodiment shown in FIG. 1 , the driving substrate 12 includes an upper hemisphere 122 and a lower hemisphere 124 that are interlocked. Some of the light-emitting elements 14 are located on the outer surface of the upper hemisphere 122 , and the other part of the light-emitting elements 14 are located on the outer surface of the lower hemisphere 124 . That is, the display panel 10 includes two hemispheres, and the display panel 10 forms a hollow spherical shell as a whole in the buckled state. The display panel 10 is two hollow hemispherical shells in the open state.

In some embodiments, the manufacturing method of the display panel 10 includes providing a curved and inflexible driving substrate 12, and then welding the plurality of light-emitting elements 14 on the outer surface of the driving substrate 12.

It should be noted that in the embodiment shown in FIG. 1 , a sphere in which the snap state of the display panel 10 is complete is used as an example for explanation. In other embodiments, the display panel 10 may be in a semi-spherical shape (that is, the driving substrate 12 is a hollow hemisphere, and the plurality of light-emitting elements 14 are located on the outer surface of the hemisphere) or the display panel 10 may be in other shapes with a curved surface structure. The curved surface structure may be a regular arc-shaped structure or an irregular special-shaped structure. For example, the driving substrate 12 includes an arc-shaped portion, wherein the arc-shaped curvature radius of the arc-shaped portion is 0.5 cm to 100 cm (eg, 0.5 cm to 1 cm, 1 cm to 10 cm, 10 cm to 20 cm). , 20 to 50 cm, 50 cm to 100 cm).

In the embodiment of the present application, the distance between adjacent light-emitting elements 14 can be no more than 50 microns, so that the size of the display panel 10 can be made very small and still have high resolution, and light emission can be achieved on the curved driving substrate 12 The transfer and welding of the components 14 allows the display panel 10 to not only achieve displays of different sizes, but also achieve curved surface displays, further broadening the range of micro-sized light-emitting components 14 (mini-light-emitting diodes or micro-light-emitting diodes). Usage scenarios.

Specifically, when the size of the display panel 10 is relatively small, for example, when the curvature radius of the arc of the drive substrate 12 is about 0.5 cm, it is used, for example, on a headset or a button on a game controller. When the size of the display panel 10 is relatively large, for example, when the radius of curvature of the arc of the driving substrate 12 is tens to 100 centimeters, it is used, for example, on a signboard.

FIG. 2 is a schematic structural diagram of a touch panel according to an embodiment of the present application. As shown in FIG. 2 , the touch panel 20 includes a base material 22 and a touch sensing layer 24 located on the surface of the base material 22 . The base material 22 is curved and inflexible, and the touch sensing layer 24 is directly formed on the surface of the base material 22 .

Specifically, the material of the base material 22 is, for example, polycarbonate (PC). In other embodiments, the base material 22 can also be other inflexible plastics. It should be noted that in the embodiments of the present application, "inflexible" means that it cannot be bent under normal temperature (or normal use), not under heating and/or pressure.

In some embodiments, the touch panel 20 is combined with the display panel 10 to form a structure with a touch display function. The touch panel 20 is stacked on the display panel 10 , and the base material 22 serves as the surface (also called a cover) that is directly contacted by the user's touch operation. In this case, the base material 22 is transparent.

In the embodiment of the present application, “the base material is curved and inflexible, and the touch sensing layer is directly formed on the surface of the base material” means that the touch sensing layer 24 is directly formed on the curved surface of the base material 22 For example, a conductive material layer (not shown) can be formed on the curved surface of the substrate 22 by sputtering or other methods, and then the conductive material layer can be processed by etching (such as photolithography technology) to form a touch control. Sensing layer 24. That is, the touch sensing layer 24 is not first formed on another carrier substrate and then attached to the base material 22 (hereinafter referred to as method 1), nor is the touch sensing layer 24 first formed on a planar base material. 22 is formed by bending the base material 22 on which the touch sensing layer 24 is formed (hereinafter referred to as method 2).

In the touch panel of the embodiment of the present application, the touch sensing layer is directly formed on the curved surface of the base material. Compared with the first method, the number of bonding steps is reduced, the thickness of the bonding adhesive layer is reduced, and the manufacturing process is simplified. ;Compared with the second method, there is no need to consider the tensile strength of the substrate during the bending step, as well as the breakage of the touch electrodes and/or wires included in the touch sensing layer during the bending step. Improved product yield. Furthermore, due to the above-mentioned advantages, the touch panel of the embodiment of the present application can further expand the application scenarios of the display panel of the embodiment of the present application when it is combined with the display panel of the embodiment of the present application, making the present application The display panel of the embodiment is used in a curved touch display device.

In some embodiments, in order to improve the light transmittance of the touch panel 20, the conductive material in the touch sensing layer 24 is made of metal mesh or indium tin oxide, for example. The touch sensing layer 24 may be a single-layer self-capacitive touch layer (not shown), and the single-layer self-capacitive touch layer includes a plurality of self-capacitive touch electrodes. When a touch occurs, there is a difference in the capacitive sensing signal corresponding to the touch point. The capacitive sensing signal is received and processed, and then converted to obtain the relative position of the touch point. Alternatively, the touch sensing layer 24 is a mutual capacitive touch sensing structure (not shown). The mutual capacitive touch sensing structure includes a plurality of touch driving electrodes and a plurality of touch sensing electrodes. When a touch occurs, The capacitive coupling between the driving electrode and the sensing electrode corresponding to the touch point will be affected, causing the sensing signal (such as voltage value) related to the mutual capacitance to change, and then the coordinates of each touch point can be calculated.

In the embodiment shown in FIG. 2 , the base material 22 includes another upper hemisphere 222 and another lower hemisphere 224 that are interlocked with each other. Part of the touch sensing layer 24 is directly formed on the inner surface of the other upper hemisphere 222 , and another part of the touch sensing layer 24 is directly formed on the inner surface of the other upper hemisphere 222 . That is, the touch panel 20 includes two hemispheres, and the touch panel 20 is a hollow spherical shell as a whole in the buckled state. The touch panel 20 has two hollow hemispherical shells in the open state. The manufacturing method of touch panel 20 includes providing a curved and The two inflexible hemispherical base materials 22 are then directly formed with touch sensing layers 24 on the inner surfaces of the two hemispherical base materials 22 respectively.

It should be noted that in the embodiment shown in FIG. 2 , a complete sphere in the snap state of the touch panel 20 is used as an example for explanation. In other embodiments, the touch panel 20 may be in the shape of a half sphere (that is, the base material 22 is a hollow hemisphere, and the touch sensing layer 24 is located on the inner surface of the hemisphere) or the touch panel 20 may be in other shapes with a curved surface structure. , the curved surface structure can be a regular arc-shaped structure or an irregular special-shaped structure. In addition, the touch sensing layer 24 in FIG. 2 is represented by a plurality of polygons, and does not mean the actual pattern arrangement of the electrodes in the touch sensing layer 24 .

Figure 3 is a schematic structural diagram of an input device according to an embodiment of the present application. As shown in FIG. 3 , the input device 100a includes a display panel 10 and a touch panel 20 . The touch panel 20 and the display panel 10 are stacked. The bending state of the touch panel 20 matches the bending state of the display panel 10 . The base material 22 of the touch panel 20 serves as a cover and is a surface that the user can directly touch and operate. In the input device 100a, the stacking order of each element in the upper and lower hemispheres is the base material 22, the touch sensing layer 24, the plurality of light-emitting elements 14 and the driving substrate 12. The touch sensing layer 24 and the plurality of light-emitting elements 14 are arranged face to face and are located between the base material 22 and the driving substrate 12 . The touch sensing layer 24 and the plurality of light-emitting elements 14 are insulated and isolated. For example, there is a transparent adhesive layer, such as optically clear adhesive (OCA) (Optically Clear Adhesive, OCA), between the touch sensing layer 24 and the plurality of light-emitting elements 14 to adhere the touch panel 20 and the display panel 10 .

The input device according to the embodiment of the present application includes the above-mentioned curved touch panel 20 and the curved display panel 10. Therefore, the input device has both a curved display function and a touch function.

Different application scenarios of the input device 100a shown in Figure 3 will be described in detail below with reference to Figures 4A to 4E.

Specifically, the input device 100a shown in FIG. 3 can be used in conjunction with the game controller 200 as an interactive device with variable situations. As shown in FIG. 4A , the upper and lower hemispheres of the input device 100a can be opened, so that the game controller 200 can be placed into the spherical shell. The display panel 10 of the input device 100a can display the corresponding ball appearance according to the type of ball game. For example, in FIG. 4A , the ball game is a baseball game. In this case, the image displayed on the display panel 10 is baseball. In FIGS. 4B , 4C , 4D and 4E , the ball game is Pokémon Ball respectively. games, basketball games, football games and tennis games. In these cases, the images displayed on the display panel 10 are Pokémon ball, basketball, football and tennis. It is understandable that the ball game is not limited to that shown in FIGS. 4A to 4E , and may also be a bowling game or a golf game, for example.

It should be noted that conventional ball games usually include the user using a game controller to perform actions similar to real-life sports, such as throwing baseballs, throwing bowling balls, shooting balls, etc. In the embodiment of the present application, the display panel 10 of the input device 100a can be changed into a corresponding spherical appearance according to the type of ball game. At the same time, the user can put the game controller 200 into the hollow spherical shell of the input device 100a, and the normal game controller can be replaced. The action of 200 is converted into an action on the spherical input device 100a, making the ball game more immersive and improving the user experience.

In some embodiments, the touch panel 20 and the display panel 10 are both curved aspheric structures, and the touch display structure 30a formed by stacking the touch panel 20 and the display panel 10 is a curved aspheric structure. In this case, the touch display structure 30a can be applied to various mobile input devices.

Specifically, as shown in Figure 5, the input device 100b is AR glasses, and the touch display structure 30a is provided on the temples of the AR glasses. The touch display structure 30a can have a certain curvature along with the temples, and the user can Bluetooth or other transmission technologies can define the content displayed on the touch display structure 30a and the functions that can be triggered by touching the touch display structure 30a. For example, when the user touches the touch display When the structure 30a is used, the AR glasses can be triggered to answer a call, and the touch display structure 30a can display the call status.

As shown in Figure 6, the input device 100c is a smart watch, and the touch display structure 30a is set on the strap of the smart watch. The touch display structure 30a can have a certain complete curvature (such as the touch display structure 30a) along with the strap. The overall curvature radius is about 3 cm). Through Bluetooth or other transmission technologies, the user can define the content displayed on the touch display structure 30a and the functions that can be triggered by touching the touch display structure 30a.

In addition, the above embodiments take an example in which the display panel 10 and the touch panel 20 are both curved structures. In other embodiments, the display panel 10 and the touch panel 20 may also have a planar structure. That is, the drive substrate 12 of the display panel 10 is flat, and the plurality of light emitting elements 14 are located on the flat drive substrate 12 . Each light-emitting element 14 is a mini light-emitting diode or a micro light-emitting diode, and the distance between adjacent light-emitting elements 14 is no more than 50 microns. Due to the display panel of the embodiment of the present application, the distance between two adjacent light-emitting elements is no more than 50 microns, so that the size of the display panel can be made very small (for example, less than a 1cm×1cm rectangular screen), so that it can be used in small sizes. In flat displays, the usage scenarios of micro-sized light-emitting elements (mini-light-emitting diodes or micro-light-emitting diodes) have been expanded.

Similarly, the base material 22 of the touch panel 20 can also be flat-shaped, and the touch sensing layer 24 is directly formed on the surface of the flat-shaped base material. The flat touch panel can be laminated with the above-mentioned planar structure display panel, which not only enables small-sized light-emitting elements (mini-light-emitting diodes or micro-light-emitting diodes) to realize small-sized flat display functions, but also enables touch control. function, further expanding the application scenarios of micro-sized light-emitting components (mini-light-emitting diodes or micro-light-emitting diodes).

Specifically, as shown in Figure 7, the input device 100d is a keyboard. The touch display structure 30b of a planar structure composed of a display panel and a touch panel is used as a keycap of a keyboard. Users can People need to change the color display and image on the keycaps, and define different functions of touch and press. For example, the user can define the pattern of the corresponding letters or characters displayed on the keycaps. In addition, in the e-sports game, the user can define the function of long-pressing different keys to trigger the replacement of different game equipment.

As shown in FIG. 8 , the input device 100e is a headset. The touch display structure 30b of a planar structure composed of a display panel and a touch panel is used as a planar display screen on the headset. The user can change the image displayed on the flat display screen according to personal needs, or define the function corresponding to touching the flat display screen. For example, the user can define the image displayed on the flat display to be changed according to the rhythm of the music currently played by the earphones, and the user can define functions such as touching the flat display to trigger the earphones to turn on or off or play the next song.

In summary, in the display panel of the embodiment of the present application, the spacing between the light-emitting elements is small, so that the display panel can be used in large-size display scenarios (such as advertising billboards), and can also be used in small-size displays (such as in AR glasses, On the watch strap or keycap); and the display panel can be used not only in flat display scenes, but also in curved display scenes (such as combining with game controllers to enhance the sense of presence in ball games), expanding the tiny size of Usage scenarios of light-emitting components (mini light-emitting diodes or micro light-emitting diodes).

In the touch panel of the embodiment of the present application, the touch sensing layer is directly formed on the curved surface of the base material, instead of the touch sensing layer being first formed on other carrier substrates and then attached to the base material. This reduces the number of bonding steps, reduces the thickness of the bonding adhesive layer, and simplifies the process; it is not necessary to first form the touch sensing layer on a planar substrate, and then form the touch sensing layer on the substrate. It is formed by bending, so the touch panel does not need to consider the tensile strength of the base material in the bending step, and the touch electrodes and/or the touch sensing layer included in the bending step. Or the problem of wire breakage improves the product yield. When the touch panel is combined with the above-mentioned display panel, the application scenarios of the above-mentioned display panel can be further expanded, so that the above-mentioned display panel also has a touch function.

The input device in the embodiment of the present application includes the above-mentioned display panel and touch panel. The input device has the advantages of the above-mentioned display panel and touch panel, and will not be described again here.

The above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced. without departing from the spirit and scope of the technical solution of the present invention.

100a: Input device

10:Display panel

12:Driver substrate

14:Light-emitting components

20:Touch panel

22:Substrate

24:Touch sensing layer

Claims (8)

A display panel, including: a driving substrate; and a plurality of light-emitting elements electrically connected to the driving substrate. Each of the light-emitting elements is a mini-light-emitting diode or a micro-light-emitting diode. The distance between adjacent light-emitting elements is Not greater than 50 microns; wherein the plurality of light-emitting elements are located on the driving substrate, and the driving substrate is curved and inflexible; wherein the driving substrate includes an arc-shaped portion, and the radius of curvature of the arc is 0.5 cm to 100 cm; wherein the driving substrate is a hollow hemisphere, and the plurality of light-emitting elements are located on the outer surface of the hemisphere; or the driving substrate includes an upper hemisphere and a lower hemisphere that are interlocked, and the portion The light-emitting elements are located on the outer surface of the upper hemisphere, and another part of the light-emitting elements are located on the outer surface of the lower hemisphere. An input device includes: the display panel according to claim 1; and a touch panel, the touch panel and the display panel are stacked. The input device according to claim 2, wherein the touch panel includes a transparent substrate and a touch sensing layer located on the surface of the substrate, the substrate, the touch sensing layer The plurality of light-emitting elements and the driving substrate are stacked in sequence, and the touch-sensing layer is insulated from the plurality of light-emitting elements. The input device according to claim 3, wherein the base material is curved and inflexible, and the touch sensing layer is directly formed on the surface of the base material. The input device according to claim 4, wherein when the driving substrate is a hollow hemisphere, the base material is another hollow hemisphere, and the touch sensing layer is directly formed on the other hollow hemisphere. on the inner surface of the hollow hemisphere; or, the driving substrate includes an upper hemisphere and a lower hemisphere that are interlocked In the case of , the base material includes another upper hemisphere and another lower hemisphere that are interlocked, part of the touch sensing layer is directly formed on the inner surface of the other upper hemisphere, and the other part of the touch sensing layer The sensing layer is directly formed on the inner surface of the other lower hemisphere. A touch panel, including: a curved and inflexible base material; and a touch sensing layer, the touch sensing layer is directly formed on the surface of the base material; wherein the base material is a hollow hemisphere , the touch sensing layer is directly formed on the inner surface of the hemisphere; or the base material includes an upper hemisphere and a lower hemisphere that are interlocked, and part of the touch sensing layer is directly formed on the upper hemisphere. On the inner surface of the lower hemisphere, another part of the touch sensing layer is directly formed on the inner surface of the lower hemisphere. An input device includes: the touch panel according to claim 6; and a display panel, the display panel and the touch panel being stacked. A method for preparing a touch panel includes: directly forming a touch sensing layer on the surface of a curved and inflexible substrate.