Touch panel and manufacturing method therefor, and touch display device

A touch panel and a manufacturing method thereof and a touch display device are disclosed. The touch panel includes: a base substrate; and a first touch electrode on the base substrate, the first touch electrode including a plurality of first touch electrode lines intersecting with one another, wherein in a direction perpendicular to the base substrate, each of the first touch electrode lines include at least two laminated transparent conductive layers, which include a laminate of a first metal oxide layer and a first metal layer, or a laminate of the first metal oxide layer and a first graphene layer.

The application is a U.S. National Phase Entry of International Application No. PCT/CN2018/104300 filed on Sep. 6, 2018, designating the United States of America and claiming priority to Chinese Patent Application No. 201710831597.8 filed on Sep. 15, 2017. The present application claims priority to and the benefit of the above-identified applications and the above-identified applications are incorporated by reference herein in their entirety.

TECHNICAL FIELD

At least one embodiment of the present disclosure relates to a touch panel and a manufacturing method thereof and a touch display device.

BACKGROUND

A metal mesh is a metal mesh pattern made of an oxide or a metal material such as silver or copper on a glass/polyethylene glycol terephthalate (glass/PET) thin film. The metal mesh has a theoretical minimum surface resistance of 0.1 ohm/□, and reduces signal interference due to an electromagnetic shielding function, but a touch sensor fabricated with the metal mesh has a very obvious Moire interference fringe due to a relatively thick line width (the line width exceeding 5 μm) of the pattern, and thus is only suitable for display screens having a large viewing distance.

SUMMARY

At least one embodiment of the present disclosure provides a touch panel, a manufacturing method of the touch panel and a touch display device. The touch panel includes: a base substrate; and a first touch electrode on the base substrate, wherein the first touch electrode includes a plurality of first touch electrode lines intersecting with one another, wherein in a direction perpendicular to the base substrate, each of the plurality of first touch electrode lines include at least two laminated transparent conductive layers, and the at least two laminated transparent conductive layers include a laminate of a first metal oxide layer and a first metal layer, or a laminate of the first metal oxide layer and a first graphene layer.

For example, each of the plurality of first touch electrode lines further includes a second metal oxide layer on a side of the first metal layer away from the first metal oxide layer or on a side of the first graphene layer away from the first metal oxide layer.

For example, a material of the first metal layer includes a silver palladium copper alloy.

For example, in the direction perpendicular to the base substrate, the first metal layer has a thickness ranging from 150 Å to 250 Å.

For example, in the direction perpendicular to the base substrate, each of the plurality of first touch electrode lines has a thickness ranging from 750 Å to 2650 Å.

For example, each of the plurality of first touch electrode lines has a square resistance which is not greater than 10Ω/□.

For example, a material of at least one of the first metal oxide layer and the second metal oxide layer includes indium tin oxide.

For example, the touch panel further includes: a second touch electrode on a side of the first touch electrode away from the base substrate, wherein the second touch electrode includes a plurality of second touch electrode lines intersecting with one another, and the first touch electrode is insulated from the second touch electrode, wherein the plurality of second touch electrode lines includes at least two another laminated transparent conductive layers, and the at least two another laminated transparent conductive layers include a laminate of a third metal oxide layer and a second metal layer, or a laminate of the third metal oxide layer and a second graphene layer.

For example, the touch panel further includes: a shadow eliminating layer between the first touch electrode and the base substrate, or on a side of the first touch electrode away from the base substrate.

At least one embodiment of the present disclosure further provides a manufacturing method of a touch panel, and the method includes: forming a first touch electrode layer on a base substrate, wherein the forming the first touch electrode layer includes forming at least two laminated transparent conductive layers, and the forming the at least two laminated transparent conductive layers includes sequentially forming a first metal oxide layer and a first metal layer, or sequentially forming the first metal oxide layer and a first graphene layer; and patterning the first touch electrode layer to form a first touch electrode, wherein the first touch electrode includes a plurality of first touch electrode lines intersecting with one another.

For example, the forming the at least two laminated transparent conductive layers further includes: forming a second metal oxide layer on a side of the first metal layer away from the first metal oxide layer or on a side of the first graphene layer away from the first metal oxide layer.

For example, the patterning the first touch electrode layer includes: patterning the at least two laminated transparent conductive layers by using a single patterning process.

For example, the manufacturing method further includes: forming a second touch electrode layer on a side of the first touch electrode away from the base substrate, wherein the forming the second touch electrode layer includes forming at least two another laminated transparent conductive layers, the forming the at least two another laminated transparent conductive layers includes sequentially forming a third metal oxide layer and a second metal layer, or sequentially forming the third metal oxide layer and a second graphene layer; and the second touch electrode layer is insulated from the first touch electrode; and patterning the second touch electrode layer to form a second touch electrode, wherein the second touch electrode includes a plurality of second touch electrode lines intersecting with one another.

For example, the manufacturing method further includes: forming a shadow eliminating layer on the base substrate before the first touch electrode layer is formed on the base substrate, or forming the shadow eliminating layer on a side of the first touch electrode away from the base substrate after the first touch electrode is formed.

At least one embodiment of the present disclosure further provides a touch display device, which includes the touch panel provided by any one of the above embodiments.

DETAILED DESCRIPTION

In order to make objects, technical solutions and advantages of the embodiments of the present disclosure apparent, the technical solutions of the embodiment of the present disclosure will be described in a clearly and fully understandable way in connection with the drawings related to the embodiments of the present disclosure. It is obvious that the described embodiments are just a part but not all of the embodiments of the present disclosure. Based on the described embodiments herein, those skilled in the art can obtain other embodiment(s), without any inventive work, which should be within the scope of the present disclosure.

Unless otherwise specified, the technical terms or scientific terms here should be of general meaning as understood by those ordinarily skilled in the art. In the present disclosure, words such as “first”, “second” and the like do not denote any order, quantity, or importance, but rather are used for distinguishing different components. Words such as “include” or “comprise” and the like denote that elements or objects appearing before the words of “include” or “comprise” cover the elements or the objects enumerated after the words of “include” or “comprise” or equivalents thereof, not exclusive of other elements or objects. Words such as “up”, “down”, “left”, “right” and the like are only used for expressing relative positional relationship, when the absolute position of the described object is changed, the relative positional relationship may also be correspondingly changed.

FIG.1is a schematic diagram of partial layer structures of a metal mesh touch panel. As shown inFIG.1, a general metal mesh touch panel includes: a base substrate10; a plurality of first touch electrodes20, a first insulating layer40, a plurality of second touch electrodes30and a second insulating layer50sequentially provided on the base substrate10. The plurality of first touch electrodes20and the plurality of second touch electrodes30may form capacitors at intersection positions, and when there is a finger touching, coupling of capacitors near a touch point is affected, so that capacitances of the capacitors near the touch point is changed, and thus, a touch position may be determined according to the change in the capacitances.

The first touch electrodes20and the second touch electrodes30in the metal mesh touch panel shown inFIG.1are electrode structures using a metal such as copper or silver or the like to form the metal mesh; and as compared with a case where indium tin oxide (ITO) serves as a touch electrode material of a touch panel, the metal mesh has a good electrical property and a low square resistance, and may be applied to a large-sized touch display product.

In the study, the inventors of the present application find that: due to specific characteristics of high reflectivity and low transmittance of the metal, a Moire phenomenon is obvious in the touch electrode with the metal mesh used therein, which is hard to overcome from a production process.

The embodiments of the present disclosure provide a touch panel and a manufacturing method thereof, and a touch display device. The touch panel includes: a base substrate; and a first touch electrode located on the base substrate, the first touch electrode including a plurality of first touch electrode lines intersecting with one another. In a direction perpendicular to the base substrate, the first touch electrode lines includes at least two laminated transparent conductive layers, and the at least two laminated transparent conductive layers include a laminate of a first metal oxide layer and a first metal layer, or include a laminate of the first metal oxide layer and a first graphene layer. The touch panel uses the at least two laminated transparent conductive layers to replace the metal mesh and to form mesh touch electrode lines in a touch electrode, which eliminates the Moire, and thus, improves an optical quality of the touch panel.

Hereinafter, the touch panel and the manufacturing method thereof, and the touch display device provided by the embodiments of the present disclosure will be described in conjunction with the accompanying drawings.

FIG.2Ais a schematic plan view of the touch panel provided by one embodiment of the present disclosure, andFIG.2Bis a cross-sectional view of partial layer structures taken along line AB inFIG.2Aaccording to one example of this embodiment. As shown inFIG.2AandFIG.2B, the touch panel provided by this embodiment includes a base substrate100and a plurality of first touch electrodes200located on the base substrate100, and each first touch electrode200includes a plurality of first touch electrode lines201intersecting with one another; in a direction perpendicular to the base substrate100, the first touch electrode line201includes at least two laminated transparent conductive layers, and the at least two laminated transparent conductive layers include a laminate of a first metal oxide layer210and a first metal layer220(or a first graphene layer220).

For example, an example of this embodiment is described with a case where the first metal layer220(or the first graphene layer220) is located on a side of the first metal oxide layer210away from the base substrate100as an example, which is not limited thereto. For example, it may also be a case where the first metal oxide layer210is located on a side of the first metal layer220(or the first graphene layer220) away from the base substrate100.

For example, as shown inFIG.2B, the first graphene layer220in the first touch electrode line201has an optical transmittance above 90% and a relatively low resistivity. Therefore, in the embodiment of the present disclosure, a structure of at least two laminated transparent conductive layers (i.e., the first metal oxide layer and the first graphene layer) is used for replacing the conventional metal mesh and serving as the mesh touch electrode lines in the touch electrode, which not only ensures an electrical demand of the touch panel, but also effectively eliminates the Moire phenomenon.

For example, as shown inFIG.2B, a material of the first metal layer220in the first touch electrode line201includes a silver palladium copper alloy (APC), with silver as a main component in the electrical material.

For example, as shown inFIG.2B, in the direction perpendicular to the base substrate100, the first metal layer220has a thickness ranging from 150 Å (angstrom) to 250 Å. For example, the silver palladium copper alloy has a thickness ranging from 150 Å to 250 Å, in which case, the silver palladium copper alloy has an optical transmittance up to above 70% and has a square resistance lower than 10Ω/□.

In addition, in an example of this embodiment, the first metal layer is provided on a side of the first metal oxide layer away from the base substrate, which may effectively prevent the first metal layer from being broken due to excessive thinness. In the embodiment of the present disclosure, the structure of the at least two laminated transparent conductive layers (i.e., the first metal oxide layer and the first metal layer) is used for replacing the conventional metal mesh and serving as the mesh touch electrode line in the first touch electrode, which not only ensures the electrical demand of the touch panel, but also effectively eliminates the Moire phenomenon.

For example, as shown inFIG.2B, the first touch electrode line201in the touch panel provided by an example of this embodiment further includes a second metal oxide layer230located on a side of the first metal layer220(or the first graphene layer220) away from the first metal oxide layer210.

For example, in the direction perpendicular to the base substrate100, the first metal layer220of the first touch electrode line201is provided between the first metal oxide layer210and the second metal oxide layer230. The two metal oxide layers in the first touch electrode line may prevent the first metal layer from being oxidized and corroded, and the tri-laminar transparent conductive layer structure included in the first touch electrode line may effectively eliminate the Moire phenomenon generated in the touch electrode, without affecting the electrical property of the first touch electrode.

For example, a material of at least one of the first metal oxide layer210and the second metal oxide layer230includes indium tin oxide (ITO). This embodiment is not limited thereto, for example, the material of the two metal oxide layers may include a combination or at least one of indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In2O3), indium gallium oxide (IGO) and aluminum zinc oxide (AZO).

For example, the first touch electrode line201has a square resistance which is not greater than 10Ω/□. For example, the first touch electrode line201has the square resistance ranging from 4Ω/□ to 7Ω/□, and this embodiment includes, but is not limited thereto.

For example, as shown inFIG.2B, in the direction perpendicular to the base substrate100, the first touch electrode line201has a thickness ranging from 750 Å to 2650 Å. For example, the first metal oxide layer210has a thickness ranging from 300 Å to 1200 Å. For example, the second metal oxide layer230has a thickness ranging from 300 Å to 1200 Å. In a case where the first touch electrode line201has the thickness ranging from 750 Å to 2650 Å, each first touch electrode line201has an optical transmittance which is not smaller than 70% and the square resistance which is not greater than 10Ω/□, and this may effectively eliminate the Moire phenomenon under the premise that the first touch electrode is ensured to have a good electrical property, because the first touch electrode has a relatively high optical transmittance.

For example, as shown inFIG.2AandFIG.2B, the touch electrode structure provided by an example of this embodiment further includes a plurality of second touch electrodes300located on a side of the first touch electrode200away from the base substrate100, each second touch electrode300includes a plurality of second touch electrode lines301intersecting with one another, the first touch electrodes200are insulated from the second touch electrodes300, and the second touch electrode line301includes at least two laminated transparent conductive layers, that is, the second touch electrode line301includes a third metal oxide layer310and a second metal layer320(or a second graphene layer320).

For example, as shown inFIG.2B, the second touch electrode line301further includes a fourth metal oxide layer330located on a side of the second metal layer320(or the second graphene layer320) away from the third metal oxide layer310.

For example, this embodiment is described with a case where each of the first touch electrode line201and the second touch electrode line301include only three transparent conductive layers as an example, which is not limited thereto, or at least one of the two may include two, four, or more transparent conductive layers.

For example, the first touch electrode line201and the second touch electrode line301according to this embodiment may consist of a same conductive structure and material. For example, respective film layers in the first touch electrode line201and the second touch electrode line301also has a same thickness.

The second touch electrode line according to this embodiment has same electrical and optical properties as the first touch electrode line, that is, each second touch electrode line has an optical transmittance which is not smaller than 70% and a square resistance which is not greater than 10Ω/□, which may effectively eliminate the Moire phenomenon under the premise that the second touch electrode is ensured to have a good electrical property, because the second touch electrode has a relatively high optical transmittance.

For example, one of the first touch electrode200and the second touch electrode300is a touch driving electrode, and the other is a touch sensing electrode.

It should be noted that, this embodiment is described with a case where the first touch electrode and the second touch electrode are located in different layers as an example, which is not limited thereto.

For example, it may also be a case where the touch panel includes one touch electrode layer, that is, the plurality of first touch electrodes include two types of touch electrodes, and the plurality of first touch electrodes include touch driving electrodes and touch sensing electrodes.

For example, as shown inFIG.2A, a peripheral region surrounding a touch region where the first touch electrodes200and the second touch electrodes300are located includes a black matrix500, that is, the black matrix500is provided at a periphery surrounding the touch panel. A plurality of first leading wires202respectively electrically connected with columns of first touch electrodes200extending along an X direction, and a plurality of second leading wires302respectively electrically connected with rows of second touch electrodes300extending along a Y direction are provided on the black matrix500.

For example, the plurality of first leading wires202electrically connected with the plurality of first touch electrodes200, and the plurality of second leading wires302electrically connected with the plurality of second touch electrodes300are connected to a touch detection chip (not shown) through a leading-wire end region, and the touch detection chip inputs/receives signals through the first leading wires202and the second leading wires302, and analyzes signals received from respective touch electrodes, to determine the touch position.

For example, as shown inFIG.2B, the touch panel provided by this embodiment further includes a first insulating layer600located between the first touch electrode200and the second touch electrode300, to insulate the first touch electrode200from the second touch electrode300. For example, a material of the first insulating layer600includes an optical transparent resin or an optical transparent adhesive, and this embodiment includes, but is not limited thereto.

In order to clearly illustrate the first touch electrodes and the second touch electrodes, the first insulating layer is not illustrated inFIG.2A, and the first touch electrodes are indicated by broken lines, to express that the first touch electrodes are located in a layer different from the layer where the second touch electrodes are located.

For example, as shown inFIG.2B, a second insulating layer700is further provided on a side of the second touch electrode300away from the first touch electrode200, and the second insulating layer700may not only be made of the same transparent insulating material as the first insulating layer600, but may also be made of a transparent insulating material different from the first insulating layer600, which will not be limited in this embodiment.

For example, as shown inFIG.2B, the touch panel further includes a shadow eliminating layer400on a side of the second touch electrode300away from the first touch electrode200. For example, a material of the shadow eliminating layer400is silicon oxynitride. In this embodiment, the shadow eliminating layer provided can reduce visual contrast between a region where the first touch electrode lines (the second touch electrode lines) are provided and a region where no first touch electrode line (no second touch electrode line) is provided, so that patterns of respective touch electrode lines fade away, which, thus, improves a shadow eliminating effect of the touch panel.

For example,FIG.2Cis a cross-sectional view of partial layer structures taken along line AB inFIG.2Ain another example of this embodiment. As shown inFIG.2C, unlikeFIG.2B, the shadow eliminating layer400in this example is provided between the first touch electrode200and the base substrate100. For example, a material of the shadow eliminating layer400in the example includes columbium pentoxide. The shadow eliminating layer in the example plays a same shadow eliminating role as the previous example, so that the shadow eliminating effect of the touch panel can be effectively improved.

An embodiment of the present disclosure provides the manufacturing method of the touch panel, andFIG.3is a schematic flow chart of the manufacturing method of the touch panel provided by the embodiment of the present disclosure. As shown inFIG.3, the manufacturing method includes following steps.

S201: forming a first touch electrode layer on the base substrate, wherein, the forming the first touch electrode layer includes forming at least two laminated transparent conductive layers, and the forming the at least two laminated transparent conductive layers includes sequentially forming a first metal oxide layer and a first metal layer, or sequentially forming the first metal oxide layer and a first graphene layer.

For example, the base substrate may be made of one or more materials of glass, polyimide, polycarbonate, polyacrylate, polyetherimide, polyethersulfone, polyethylene glycol terephthalate and polyethylene naphthalate.

For example, before the first touch electrode layer is formed, the black matrix layer is formed on the base substrate, and the black matrix layer is patterned to form a black matrix pattern located in a non-touch region (the periphery surrounding the touch panel).

For example, the forming the at least two laminated transparent conductive layers includes: forming the whole-face first metal oxide layer on the base substrate, and then forming the whole-face first metal layer or the whole-face first graphene layer on the first metal oxide layer.

For example, an orthogonal projection of the first metal layer or the first graphene layer on the base substrate completely coincides with an orthogonal projection of the first metal oxide layer on the base substrate.

This embodiment is not limited thereto, for example, the forming the at least two laminated transparent conductive layers may further include: forming the whole-face first metal layer or the whole-face first graphene layer on the base substrate, and then forming the whole-face first metal oxide layer on the first metal layer or first graphene layer.

For example, a material of the first metal oxide layer may include a transparent conductive material such as indium tin oxide, and this embodiment includes, but is not limited thereto. For example, the material of the first metal oxide layer includes a combination or at least one of indium zinc oxide, zinc oxide, indium oxide, indium gallium oxide, and aluminum zinc oxide.

For example, in the direction perpendicular to the base substrate, the first metal oxide layer has a thickness ranging from 300 Å to 1200 Å.

For example, the material of the first metal layer includes the silver palladium copper alloy.

For example, in the direction perpendicular to the base substrate, the silver palladium copper alloy has a thickness ranging from 150 Å to 250 Å, in this case, the silver palladium copper alloy has an optical transmittance up to above 70% and has a square resistance lower than 10Ω/□. In addition, in this embodiment, the first metal layer is provided on a side of the first metal oxide layer away from the base substrate, which may effectively prevent the first metal layer from being broken due to excessive thinness. In the embodiment of the present disclosure, the structure of at least two laminated transparent conductive layers (i.e., the first metal oxide layer and the first graphene layer) is used for replacing the conventional metal mesh and forming the mesh touch electrode lines in a touch electrode, which not only ensures an electrical demand of the touch panel, but also effectively eliminates a Moire phenomenon.

For example, the first graphene layer has an optical transmittance above 90% and a relatively low resistivity, and therefore, like the transparent first metal layer, the first graphene layer may also achieve an effect of ensuring an electrical demand of the touch panel, and effectively eliminating the Moire phenomenon.

For example, this embodiment is described with a case where the first metal layer or the first graphene layer is located on the side of the first metal oxide layer away from the base substrate as an example, then the forming the at least two laminated transparent conductive layers further includes: forming a second metal oxide layer on a side of the first metal layer or the first graphene layer away from the first metal oxide layer. The first metal layer in one example of this embodiment is located between the two transparent metal oxide layers, which may effectively reduce a probability that the first metal layer is oxidized and corroded.

For example, the second metal oxide layer may be made of a same transparent conductive material as the first metal oxide layer, and this embodiment includes, but is not limited thereto.

For example, in the direction perpendicular to the base substrate, the second metal oxide layer has a thickness ranging from 300 Å to 1200 Å.

For example, in the direction perpendicular to the base substrate, the first touch electrode layer has a thickness ranging from 750 Å to 2650 Å, in this case, the first touch electrode layer has an optical transmittance which is not smaller than 70% and a square resistance which is not greater than 10Ω/□. For example, the first touch electrode layer has the square resistance ranging from 4Ω/□ to 7Ω/□, and this embodiment includes, but is not limited thereto. Therefore, the first touch electrode layer according to this embodiment not only has a good electrical property, but also has a relatively high optical transmittance.

For example, this embodiment is described with a case where the first touch electrode layer includes three transparent conductive layers as an example, which is not limited thereto, or the first touch electrode layer includes for example four or more transparent conductive layers.

S202: patterning the first touch electrode layer to form the plurality of first touch electrodes, each first touch electrode including the plurality of first touch electrode lines intersecting with one another.

For example, the patterning the first touch electrode layer includes patterning the at least two laminated transparent conductive layers by a single patterning process, that is, the patterning the first touch electrode layer includes: coating a photoresist layer on the first touch electrode layer, exposing and developing the photoresist layer to form a mesh-like template, and then simultaneously etching the at least two transparent conductive layers in the first touch electrode layer with nitrohydrochloric acid for 120 seconds to form the first touch electrode having the plurality of first touch electrode lines intersecting with one another. The single patterning process used in this embodiment can simplify process steps and save costs.

For example, in an example of this embodiment, the at least two transparent conductive layers may also be respectively etched with the nitrohydrochloric acid and oxalic acid. For example, the first metal oxide layer and the second metal oxide layer may be etched with the nitrohydrochloric acid, and the first metal layer may be etched with the oxalic acid.

For example, the first transparent insulating layer is formed on the first touch electrode to insulate the first touch electrode from a subsequently formed second touch electrode layer.

For example, the first insulating layer is made of a material including an optical transparent resin or an optical transparent adhesive, and this embodiment includes, but is not limited thereto. For example, a layer of optical transparent resin or a layer of optical transparent adhesive is coated on the first touch electrode and cured at 230° C.

For example, the second touch electrode layer is formed on a side of the first touch electrode away from the base substrate, the forming the second touch electrode layer includes forming at least two laminated transparent conductive layers, and the forming the at least two laminated transparent conductive layers includes sequentially forming a third metal oxide layer and a second metal layer, or sequentially forming a third metal oxide layer and a second graphene layer.

The step of forming the first touch electrode layer may be referred to for forming the second touch electrode layer according to this embodiment, which will not be repeated here.

For example, the second touch electrode layer is patterned to form the plurality of second touch electrodes, and each second touch electrode includes the plurality of second touch electrode lines intersecting with one another.

For example, the patterning the second touch electrode layer includes: patterning the at least two laminated transparent conductive layers by a single patterning process, so as to save process steps, and this embodiment includes, but is not limited thereto.

For example, the whole-face second transparent insulating layer is formed on the second touch electrode to protect the second touch electrode lines intersecting with one another.

For example, the second transparent insulating layer may be formed with a same material by using same process steps as the first transparent insulating layer, and this embodiment includes, but is not limited thereto.

For example, a shadow eliminating layer is formed on the side of the second touch electrode away from the first touch electrode, that is, the shadow eliminating layer may be formed on the second transparent insulating layer, so as to improve a shadow eliminating effect of the touch panel.

For example, the shadow eliminating layer may be made of silicon oxynitride.

For example, screen etching is performed on the shadow eliminating layer located in a bonding region to remove the shadow eliminating layer material located in the bonding region.

For example, in another example of this embodiment, the shadow eliminating layer is formed on the base substrate before the first touch electrode layer is formed, and then the whole-face first touch electrode layer is formed on the shadow eliminating layer; and in the example, the shadow eliminating layer can effectively improve the shadow eliminating effect of the touch panel.

For example, the shadow eliminating layer in the example is made of a material including columbium pentoxide.

Another embodiment of the present disclosure provides the touch display device, and the touch electrode lines included in the touch electrodes in the touch display device not only has a good electrical property, but also has an optical transmittance which is not smaller than 70%, so it may effectively eliminate a Moire phenomenon.

For example, the touch display device provided by an example of this embodiment further includes the shadow eliminating layer, so the touch display panel further has a good shadow eliminating effect.

For example, the touch display device may be a display device such as a liquid crystal display device and an organic light-emitting diode (OLED) display device, or may be any other product or component having a display function including the display device such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a laptop, and a navigator, and this embodiment is not limited thereto.

There are some points to be illustrated:

(1) Unless otherwise defined, in the embodiments of the present disclosure and the accompanying drawings, a same reference sign denotes a same meaning;

(2) Drawings of the embodiments of the present disclosure only refer to structures related with the embodiments of the present disclosure, and other structures may refer to general design;

(3) In order to make it clear, in the drawings for illustrating the embodiments of the present disclosure, layers or regions are magnified. It should be understood that, when elements such as a layer, a film, a region or a substrate and the like are called to be “on” or “below” another element, the elements may be directly located “on” or “below” the another element, or there may be an intermediate element.

The above merely is specific embodiments of the present disclosure, and not intended to define the scope of the present disclosure. Any variations or replacements which can be easily thought of by those skilled in the art in the scope of the present disclosure all shall fall within the scope of protection of the present disclosure. Therefore, the scope of the present disclosure should be the scope of the following claims.