TWI412984B - Touch panel and method for manufacturing the same and touch display device - Google Patents

Abstract

The present invention relates to a touch panel, a method for manufacturing the same, and a touch display device using the same. The touch panel includes a base substrate, a lower conductive layer disposed on the base substrate, an insulating layer disposed on the lower conductive layer, at least one first conductive wire dispose on the insulating layer, a light shielding layer disposed on the at least one first conductive wire, and an upper conductive layer disposed on the light shielding layer. The at least one conductive wire and the light shielding layer are located at an edge region of the touch panel in a planar view. The light shielding layer includes at least one conductive hole. The upper conductive layer is electrically connected to the at least one conductive wire via the at least conductive hole.

Description

Touch screen, touch screen manufacturing method and touch display device

The present invention relates to a touch screen, a method of manufacturing the touch screen, and a touch display device using the touch screen.

With the rapid development of flat panel display technology and the decreasing manufacturing cost, flat panel display devices with low radiation, small thickness and low power consumption are increasingly favored by consumers, and thus are widely used in electronic products. In order to meet the needs of modern people for a more convenient and more intuitive human-machine interface, various flat panel display devices with touch functions, namely touch display devices, have been gradually introduced in the market in recent years. Generally, the touch display device can be divided into an external type and an in-line type; wherein, the external touch display device is attached with a touch screen based on the conventional flat display device, including resistive, capacitive, infrared, and Various types of surface acoustic waves.

Among the above various types, the capacitive touch screen has been favored by users because of its stable performance, support for multi-touch, and high service life, and is widely used in touch display devices.

The conventional capacitive touch screen generally includes a substrate, a conductive layer disposed on the substrate, an insulating layer, an upper conductive layer, and a light-shielding ink covering the periphery of the upper conductive layer. Further, in order to protect the upper conductive layer The control layer is not worn or damaged, and a transparent cover layer (Coverlens) is disposed above the conductive layer on the capacitive touch screen, wherein the transparent cover layer is optically bonded to the light-shielding ink.

However, in the manufacturing process of the above touch screen, the step of bonding the transparent cover layer by optical adhesive not only causes complicated process, but also causes damage of the upper conductive layer and reduces reliability, and the use of the optical adhesive also increases manufacturing to a certain extent. cost.

In view of this, it provides a simple process, high reliability, and relatively low cost. A low touch screen is really necessary.

At the same time, it is necessary to provide a touch screen manufacturing method and a touch display device using the above touch screen.

A touch screen includes a substrate, a conductive layer disposed on the substrate, an insulating layer disposed on the lower conductive layer, at least one first transmission line disposed on the insulating layer, and a a light shielding layer on the first transmission line and a conductive layer disposed on the light shielding layer, wherein the light shielding layer and the at least one first transmission line are located on an edge region of the touch screen, the light shielding layer includes at least one first pass And the upper conductive layer is electrically connected to the at least one first transmission line through the at least one first through hole.

A touch screen includes a lower conductive layer, an insulating layer disposed on the lower conductive layer, a conductive layer disposed on the insulating layer, and a transparent cover layer covering the upper conductive layer, the insulating layer a first transmission line is disposed, and the first transmission line is provided with a light shielding layer, the light shielding layer includes a first through hole, and the first transmission line is electrically connected to the upper conductive layer through the first through hole, the light shielding layer and The first transmission line is located on the edge of the touch screen, and the upper and lower conductive layers overlap to form a first touch capacitor. The first through hole serves as a touch function of the first touch capacitor. The control symbol, when the position of the first through hole is touched, the capacitance value of the first touch capacitor changes and is detected.

A method for manufacturing a touch screen, comprising the steps of: providing a transparent substrate as a transparent cover layer of the touch screen; forming an upper conductive layer directly on the transparent cover layer; away from the transparent cover on the upper conductive layer Forming a light shielding layer and at least one light shielding layer through hole on one side of the layer; forming at least one first transmission line on a side of the light shielding layer away from the upper conductive layer, and passing the at least one first transmission line and the upper conductive layer through the at least one The first through hole is electrically connected; an insulating layer is formed on a side of the at least one first transmission line away from the light shielding layer; and A conductive layer is formed on a side of the insulating layer away from the at least one first transmission line.

A touch display device includes a touch screen and a display panel stacked on the touch screen. The touch screen includes a substrate and a lower conductive layer and an insulation along a surface away from the surface of the substrate. a layer, at least one first transmission line, a light shielding layer and an upper conductive layer, the light shielding layer defining the light-shielding display area and an edge area of the position where the light shielding layer is located, the at least one first transmission line In the edge region, the light shielding layer includes at least one first through hole. The at least one first transmission line is electrically coupled to an external circuit on the one hand, and electrically coupled to the upper conductive layer through the at least one first through hole. Floor.

Compared with the prior art, in the touch screen, the touch screen manufacturing method and the touch display device of the present invention, the light shielding layer is not disposed between the upper conductive layer and the transparent cover layer, so that the upper conductive layer can be directly formed on the touch layer. A transparent cover layer, thereby simplifying the process; at the same time, the process can save the optical glue and its adhesion can also improve reliability and reduce manufacturing costs.

The touch screen provided by the first embodiment of the present invention includes a substrate, a conductive layer disposed on the substrate, an insulating layer disposed on the lower conductive layer, and a first transmission line disposed on the insulating layer. a light shielding layer disposed on the first transmission line and a conductive layer disposed on the light shielding layer, wherein the light shielding layer and the first transmission line are located on an edge region of the touch screen, the light shielding layer includes a first a through hole through which the upper conductive layer is electrically connected to the first transmission line.

In the touch screen provided by the first embodiment, the upper conductive layer can be directly formed on a transparent cover layer, thereby simplifying the process and reducing the manufacturing cost.

The touch screen provided by the second embodiment of the present invention includes a lower conductive layer, an insulating layer disposed on the lower conductive layer, a conductive layer disposed on the insulating layer, and a transparent cover layer covering the upper conductive layer. a first transmission line is further disposed on the insulating layer, and a shielding is disposed on the first transmission line a layer, the light shielding layer includes a first through hole, the first transmission line is electrically connected to the upper conductive layer through the first through hole, and the light shielding layer and the first transmission line are located on an edge region of the touch screen. The lower conductive layer overlaps the edge area to form a first touch capacitor. The first through hole serves as a touch function control function of the first touch capacitor. When the position of the first through hole is touched, the The capacitance of the first touch capacitor changes and is detected.

In the second embodiment, the light shielding layer is located between the upper and lower conductive layers, and the upper conductive layer can be directly formed on a transparent cover layer, so that the touch screen provided by the second embodiment is earlier than the previous one. Technology can simplify processes and reduce manufacturing costs.

Further, in an embodiment, the light shielding layer includes a first through hole, the upper conductive layer includes a plurality of first conductive lines extending along a first direction, and the first transmission line is electrically connected to the first through hole through the first through hole One of the plurality of first conductive lines.

Further, in an embodiment, the lower conductive layer includes a second conductive line extending in a second direction and insulated from the plurality of first conductive lines, the second direction being perpendicular to the first direction.

Further, the lower conductive layer further includes an additional conductive line extending in the second direction, the additional conductive line partially overlapping one of the plurality of first conductive lines or the first transmission line, thereby forming the first touch capacitance.

Further, in an embodiment, the first through hole further corresponds to the first touch capacitor, and the first through hole serves as the touch function control.

Further, in an embodiment, the touch function control can be a volume control, a music video play control, or a screen slide control.

Further, in an embodiment, the touch screen further includes a second transmission line located in the edge region, and the second transmission line is configured to electrically connect one of the plurality of second conductive lines of the lower conductive layer.

Further, in an embodiment, the upper conductive layer further includes an additional conductive line extending along the first direction, and one of the upper conductive layers is additionally guided The electrical circuit is insulatively overlapped with one of the plurality of second conductive lines or the second transmission line to form a second touch capacitor.

Further, in an embodiment, the light shielding layer further includes a second through hole corresponding to the second touch capacitor and serving as a touch function control function of the second touch capacitor. When the position of the second through hole is touched, the capacitance value of the second touch capacitor changes and is detected.

Further, in an embodiment, the edge region further includes a bonding region, and one of the first transmission line and the second transmission line is arranged at the bonding region for electrically connecting to an external circuit.

Further, in one embodiment, the material of the transparent cover layer is glass or acryl.

Further, in one embodiment, the material of the light shielding layer comprises an ink.

Further, in an embodiment, the overlapping area of the additional conductive line of the upper conductive layer and one of the plurality of second conductive lines is trapezoidal.

Alternatively, in an embodiment, the additional conductive line of the upper conductive layer may include a comb structure and a communication portion communicating with the comb, the second conductive line extending to the additional conductive line of the edge region adjacent to the second conductive layer The portion also includes a comb structure, and the comb structure of the additional conductive line of the upper conductive layer is in interactive engagement with the comb structure of the second conductive line. The communication portion of the additional conductive line of the upper conductive layer overlaps with the comb structure portion of the second conductive line to form the at least one second touch capacitor.

Further, in an embodiment, the comb structure of the additional conductive line of the upper conductive layer and the comb structure of the second conductive line may be substantially rectangular, substantially circular or trapezoidal in shape.

Or in an embodiment, the additional conductive line of the upper conductive layer comprises a hollow annular structure and a communication portion communicating with the annular structure, the second conductive line extending to the additional conductive line of the edge region adjacent to the upper conductive layer The part includes a circular portion and a connecting portion. The circular portion is located at the center of the annular structure, and the communication portion of the second conductive line overlaps the annular structure Forming at least one second touch capacitor.

The present invention also provides a method for manufacturing a touch screen, comprising the steps of: providing a transparent substrate as a transparent cover layer of the touch screen; forming an upper conductive layer directly on the transparent cover layer; and forming the upper conductive layer on the transparent cover layer Forming a light shielding layer and at least one light shielding layer through hole away from one side of the transparent cover layer; forming at least one first transmission line on the side of the light shielding layer away from the upper conductive layer, and the at least one first transmission line and the upper conductive layer Electrically connecting through the at least one first through hole; forming an insulating layer on a side of the at least one first transmission line away from the light shielding layer; and forming a lower conductive layer on a side of the insulating layer away from the at least one first transmission line.

Wherein, the upper conductive layer and the lower conductive layer are insulated from each other.

In the manufacturing method of the touch panel, the upper conductive layer is directly formed on the transparent cover layer, thereby simplifying the process and reducing the manufacturing cost.

The present invention further provides a touch display device including a touch screen and a display panel stacked on the touch screen. The touch screen includes a substrate and a conductive layer disposed in a direction away from a surface of the substrate. a layer, an insulating layer, a first transmission line, a light shielding layer and an upper conductive layer, the light shielding layer defining the light shielding display area and an edge area of the position of the light shielding layer, the first The transmission line is located in the edge region, and the light shielding layer includes a first through hole. The first transmission line is electrically coupled to an external circuit on the one hand, and electrically coupled to the upper conductive layer through the first through hole.

In the touch display device, the upper conductive layer can be directly formed on a transparent cover layer, thereby simplifying the process and reducing the manufacturing cost.

Further, in an embodiment, the light shielding layer may have a hollow frame shape.

Further, in an embodiment, the touch screen further includes a The transparent cover layer on the upper conductive layer, and the upper conductive layer is directly formed on the transparent cover layer.

Further, in an embodiment, the upper conductive layer includes a plurality of first conductive lines extending along a first direction, and the first transmission line is electrically connected to one of the plurality of first conductive lines through the first through hole .

Further, in an embodiment, the lower conductive layer includes a second conductive line extending in a second direction and insulated from the plurality of first conductive lines, the second direction being perpendicular to the first direction.

Further, the lower conductive layer further includes an additional conductive line extending in the second direction, the additional conductive line is located in the edge region, and the additional conductive line is partially intersected with one of the plurality of first conductive lines or the first transmission line Stacked to form a first touch capacitor.

Further, in an embodiment, the first through hole further corresponds to the first touch capacitor, and the first through hole serves as a touch function control function of the first touch capacitor.

Further, in an embodiment, the touch function control can be a volume control, a music video play control, or a screen slide control.

Further, in an embodiment, the touch screen further includes a second transmission line located in the edge region, and the second transmission line is configured to electrically connect one of the plurality of second conductive lines of the lower conductive layer.

Further, in an embodiment, the upper conductive layer further includes an additional conductive line extending along the first direction, the additional conductive line of the upper conductive layer and one or the at least one of the plurality of second conductive lines The two transmission lines are partially insulated to form a second touch capacitor.

Further, in an embodiment, the light shielding layer further includes a second through hole corresponding to the second touch capacitor and serving as a touch function control function of the second touch capacitor. When the position of the second through hole is touched, the capacitance value of the second touch capacitor changes and is detected.

Further, in an embodiment, the edge region further includes a connection And a one of the first transmission line and the second transmission line is arranged at the junction area for electrically connecting to an external circuit.

Further, in one embodiment, the material of the transparent cover layer is glass or acryl.

Further, in one embodiment, the material of the light shielding layer comprises an ink.

Further, in an embodiment, the overlapping area of the additional conductive line of the upper conductive layer and one of the plurality of second conductive lines is trapezoidal.

Alternatively, in an embodiment, the additional conductive line of the upper conductive layer may include a comb structure and a communication portion communicating with the comb, the second conductive line extending to the edge of the additional conductive line adjacent to the upper conductive layer The portion also includes a comb structure, and the comb structure of the additional conductive line of the upper conductive layer is in interactive engagement with the comb structure of the second conductive line. The communication portion of the additional conductive line of the upper conductive layer overlaps with the comb structure portion of the second conductive line to form the at least one second touch capacitor.

Further, in an embodiment, the comb structure of the additional conductive line of the upper conductive layer and the comb structure of the second conductive line may be substantially rectangular, substantially circular or trapezoidal in shape.

Or in an embodiment, the additional conductive line of the upper conductive layer comprises a hollow annular structure and a communication portion communicating with the annular structure, the second conductive line extending to the additional conductive line of the edge region adjacent to the upper conductive layer The part includes a circular portion and a connecting portion. The circular portion is located at the center of the annular structure, and the communication portion of the second conductive line overlaps with the annular structure to form at least one second touch capacitor.

The preferred embodiments of the touch screen and the touch display device of the present invention are described below with reference to the accompanying drawings.

Please refer to FIG. 1. FIG. 1 is a perspective exploded view of a preferred embodiment of the touch screen of the present invention. The touch screen 100 includes a substrate 110, a lower conductive layer 120, an upper conductive layer 160, an insulating layer 112, a light shielding layer 150, a transparent cover layer 114, a plurality of first transmission lines 140, and a plurality of second transmissions. Line 130. The lower conductive layer 120 is disposed on the substrate 110. The plurality of second transmission lines 130 are electrically connected to the lower conductive layer 120, and the plurality of second transmission lines 130 may also be disposed on the substrate 110. The insulating layer 112 is disposed above the lower conductive layer 120. In an embodiment, the insulating layer 112 may cover the lower conductive layer 120 and the plurality of first transmission lines 140. The plurality of first transmission lines 140 are disposed on the insulating layer 112. The light shielding layer 150 is disposed on the plurality of first transmission lines 140 and includes a plurality of first through holes 152. The upper conductive layer 160 is located on the light shielding layer 150, and is electrically connected to the plurality of first transmission lines 140 through the plurality of first through holes 152 of the light shielding layer 150.

2, FIG. 3 and FIG. 4, FIG. 2 is a schematic view of the components of the touch screen 100 shown in FIG. 1, and FIG. 3 is a plan perspective view of the touch screen 100 of FIG. It is a schematic cross-sectional view of Figure 3 along line IV-IV. The light shielding layer 150 is a hollow rectangular frame located on the edge region 102 around the touch screen 100 in a plane. The hollow rectangular frame of the light shielding layer 150 defines a light transmissive touch display area 104 surrounded by the edge region 102. The plurality of first transmission lines 140 and the plurality of second transmission lines 130 are insulated from each other and are located directly below the light shielding layer 150 on the plane (ie, located in the edge region 102 of the touch screen 100). Preferably, the plurality of first transmission lines The 140 and the plurality of second transmission lines are staggered from each other.

The upper conductive layer 160 includes a plurality of first conductive lines 162 extending along a first direction X. The lower conductive layer 120 includes a plurality of second conductive lines 122 extending along a second direction Y and insulated from the plurality of first conductive lines 162, wherein the second direction Y is perpendicular to the first direction X. The plurality of first conductive lines 162 extend through the touch display area 104 , and the plurality of first conductive lines 162 overlap the light shielding layer 150 at the edge area 102 . The plurality of second conductive lines 122 also penetrate the touch display area 104, and the plurality of second conductive lines 122 may partially overlap the light shielding layer 150 at the edge area 102.

The plurality of first transmission lines 140 are in one-to-one correspondence with the plurality of first conductive lines 162, and each of the first transmission lines 140 passes through a corresponding one of the first through holes 152. The electrical connection corresponds to one of the first conductive lines 162. One end of each of the first transmission lines 140 electrically connected to the first conductive line 162 defines an electrode 142, and the shape of the electrode 142 may be a specific shape such as a rectangle or a circle.

The lower conductive layer 120 further includes an additional conductive line 124. In the embodiment, the number of the additional conductive lines 124 is two. In other embodiments, the number of the additional conductive lines 124 may also be selected according to actual conditions. The two additional conductive lines 124 may each extend along the second direction Y and are respectively located on opposite sides of the plurality of second conductive lines 122, such as a lower left side and a higher right side. The two additional conductive lines 124 and the light shielding layer 150 at least partially overlap. Preferably, in the embodiment, the two additional conductive lines 124 are located in the edge region 102, that is, directly below the light shielding layer 150. Each of the additional conductive lines 124 is also electrically connected to a second transmission line 130.

In the plane, the two additional conductive lines 124 overlap the plurality of first conductive lines 162 and the first transmission line 140 to form a plurality of first touch capacitors 170. At the same time, the two additional conductive lines 124 correspond to the plurality of first through holes 152, and the plurality of first through holes 152 are respectively for the plurality of first touch capacitors 170, and the plurality of first through holes 152 As the touch function control function of the first first touch capacitor 170, when the transparent cover layer 114 at a certain first through hole 152 is touched or operated, the first through hole 152 corresponds to the first touch. The capacitance of the capacitor 170 changes. The external circuit connected to the first and second transmission lines 140 and 130 can detect that the capacitance of the first touch capacitor 170 changes, and the external circuit can perform corresponding operations. . The touch function control character can be the volume control symbol or the screen slide control symbol shown in FIG. 1, FIG. 2 and FIG.

Referring to FIG. 4 again, the upper conductive layer 160 is directly in contact with the transparent cover layer 114, and the upper conductive layer 160 is formed on the transparent cover layer 114. For example, during the manufacturing process, the transparent cover layer 114 may be directly used. The upper conductive layer 160 is formed by depositing a transparent conductive material for carrying the substrate.

The edge region 102 further includes a bonding region 1022, the first transmission One end of the line 140 and the second transmission line 130 are arranged in the joint region 1022 for electrical connection with an external circuit such as a flexible circuit board.

Further, the material of the transparent cover layer 114 may be glass or acrylic. The material of the light shielding layer 150 may be an ink. The upper conductive layer 160 and the lower conductive layer 120 are both transparent conductive layers, and the material thereof may be indium zinc oxide. The material of the first transmission line 140 and the second transmission line 130 may be a metal or a transparent conductive layer. Preferably, the materials of the first transmission line 140 and the second transmission line 130 are silver.

Compared with the prior art, in the touch screen 100 of the present invention, the upper conductive layer 160 can be directly formed on the transparent cover layer 114 because the light shielding layer 150 is not disposed between the upper conductive layer 160 and the transparent cover layer 114. This simplifies the process; at the same time, the process eliminates the optical glue and its adhesion can also improve reliability, reduce manufacturing costs, and reduce the thickness of the touch screen 100.

In addition, the touch screen 100 of the present invention forms a plurality of first touch capacitors 170 by adding additional conductive lines 124 overlapping the plurality of first conductive lines 162 and the plurality of first transmission lines 140. At the same time, the plurality of first vias 152 of the light shielding layer 150 are used not only to turn on the first transmission line 140 and the first conductive line 162, but also serve as a touch function control function of the plurality of first touch capacitors 170, so that the touch The edge area 102 of the control panel 100 adds a touch function to improve the operability of the touch screen 100.

5 and FIG. 6, FIG. 5 is a plan perspective view of another preferred embodiment of the touch screen of the present invention, and FIG. 6 is a perspective structural view of the touch screen of FIG. The main difference between the touch screen 200 of the preferred embodiment and the touch screen 100 is that the upper conductive layer 260 further includes an additional conductive line 264 extending along the first direction, and the additional conductive line of the upper conductive layer 260 264 is insulated from the second conductive line 222 or the second transmission line 130 to form a plurality of second touch capacitors (not labeled). The light shielding layer 250 further includes a plurality of second through holes 254 for the complex number The second touch capacitor is used as a touch function control function of the second touch capacitor, and the touch function is controlled. The modifier can be a music video playback control. In addition, the additional conductive line 264 of the upper conductive layer 260 is also electrically connected to a first transmission line 240 through a second through hole 254'. In this embodiment, only one second through hole 254' is used for electrically connecting the first transmission line. 240 and the additional conductive line 264 of the upper conductive layer 260, the other second through holes 254 do not achieve the function of electrical connection, which mainly functions as a touch function control.

Compared with the touch screen 100 of the preferred embodiment, the conductive layer 260 of the touch screen 200 of the second embodiment further includes an additional conductive line 264 extending along the first direction, and the conductive layer 260 is additionally conductive. The circuit 264 is insulated from the second conductive line 222 or the second transmission line 230 to form a plurality of second touch capacitors, and the plurality of second through holes 254 are disposed as the touch function of the second touch capacitor. Further, increasing the edge area of the touch screen 200 increases the touch function and improves the operability of the touch screen 200.

In addition, please refer to FIG. 7, which is a partial enlarged view of FIG. As can be seen from FIG. 7, the overlapping area of the additional conductive line 264 of the upper conductive layer 260 and the second conductive line 222 is trapezoidal. Of course, the shape of the overlapping area may be other shapes. Further, in order to make the characteristics of the touch capacitance formed by overlapping the additional conductive line 264 and the second conductive line 222, the second conductive line 222 and the additional conductive layer are adjusted to adjust the area of the overlapping area. Part of the shape of line 264 has also been newly designed.

Please refer to FIG. 8 to FIG. 11 . FIG. 8 to FIG. 11 are schematic diagrams showing several modified embodiments of FIG. 7 . 8 , FIG. 9 and FIG. 10 , the additional conductive line 264 of the upper conductive layer 260 may include a comb structure 2641 and a communication portion 2642 communicating with the comb, and the second conductive line 222 extends to the edge region adjacent to the edge region. The portion of the additional conductive line 264 of the upper conductive layer 260 also includes a comb structure 2221. The comb structure 2641 of the additional conductive line 264 of the upper conductive layer 260 and the comb structure 2221 of the second conductive line 222 are in one-to-one interaction. The connecting portion of the additional conductive line 264 of the upper conductive layer 260 2642 and a portion of the comb structure 2221 of the second conductive line 222 overlap to form a second touch capacitor. The main difference between FIG. 8 and FIG. 9 is that the comb-like structure 2641 and the comb-shaped structure 2221 are integrally formed in different shapes, and are respectively rectangular, substantially circular, and trapezoidal.

In FIG. 11, the additional conductive trace 264 of the upper conductive layer 260 includes a hollow annular structure 2641' and a communication portion 2642' that communicates with the annular structure. The second conductive trace 222 extends to the edge region adjacent to the upper conductive layer 260. The portion of the additional conductive line 264 includes a circular portion 2223 and a communication portion 2220. The circular portion 2223 is located at the center of the annular structure 2641', and the communication portion 2222 of the second conductive line 222 overlaps with the annular structure 2641' to form a second touch capacitor.

The design of FIG. 8 to FIG. 11 allows the additional conductive line 264 and the second conductive line 222 to increase the area that can be touched without increasing the overlap area, and can be specifically designed to conform to the size of a human finger. To improve the ease of operation of the touch screen.

Further, referring to FIG. 1 and FIG. 4 again, the present invention further provides a method for manufacturing the touch panel 100 described above, the method comprising the following steps:

Step S1: providing a transparent substrate as the transparent cover layer 114 of the touch screen 100.

Specifically, the transparent substrate serves as a carrier substrate and also serves as a contact contact surface of the touch screen 100, that is, the transparent cover layer 114.

Step S2: forming an upper conductive layer 160 directly on the transparent cover layer 114.

Specifically, a first transparent conductive layer is deposited on a surface of the transparent cover layer 114; and a predetermined pattern is provided to etch the first transparent conductive layer to form a conductive layer 160 over the pattern shown in FIG.

Step S3: forming a light shielding layer 150 and a plurality of first through holes 152 in the light shielding layer 150 on a side of the upper conductive layer 160 away from the transparent cover layer 114.

Specifically, the upper conductive layer 160 is away from the transparent cover layer 114. A light-shielding material is deposited on the surface, and the light-shielding material of the layer is etched to form a light-shielding layer 150 of the pattern shown in FIG. 1 and a plurality of first via holes 152 located in the light-shielding layer 150.

Step S4: forming a plurality of first transmission lines 140 on a side of the light shielding layer 150 away from the upper conductive layer 160, and the plurality of first transmission lines 140 and the upper conductive layer 160 are electrically connected through the plurality of first through holes 152. The step includes: depositing a first metal layer on the surface of the light shielding layer 150 away from the upper conductive layer 160, and etching the first metal layer to form a plurality of first transmission lines 140 of the pattern shown in FIG.

Step S5: forming the insulating layer 112 on a side of the plurality of first transmission lines 140 away from the light shielding layer 150. The step of depositing an insulating material covering the plurality of first transmission lines 140, the light shielding layer 150, the upper conductive layer 160 and the transparent cover layer 114;

Step S6: forming a lower conductive layer 120 on a side of the insulating layer 112 away from the plurality of first transmission lines 140. Specifically, a second transparent conductive layer is deposited on the surface of the insulating layer 112 away from the plurality of first transmission lines 140, and the first transparent conductive layer is etched to form the conductive layer 120 under the pattern shown in FIG.

Step S7: forming a plurality of second transmission lines 130 electrically connected to the lower conductive layer 120. The step includes depositing a second metal layer and etching the second metal layer to form a plurality of second transmission lines 130 of the pattern shown in FIG.

Step S8: covering the side of the lower conductive layer 120 away from the insulating layer 112, an insulating layer is formed, that is, the substrate 110 is formed. The step includes depositing an insulating material to cover the lower conductive layer 120, the plurality of second transmission lines 130, and the insulating layer 112.

Compared with the manufacturing method of the prior art, in the manufacturing method of the touch screen 100 of the present invention, the upper conductive layer 160 is directly formed on the transparent cover layer 114, thereby simplifying the process and reducing the manufacturing cost.

12 is a schematic view of a preferred embodiment of the touch display device of the present invention Figure. The touch display device 10 includes a touch screen 20, a display panel 30 stacked on the touch screen 20, and a circuit board 40 electrically connected to the touch screen 20. The touch screen 20 can adopt the first In any of the second embodiments, the display panel 30 can be a liquid crystal display panel, an organic light-emitting display panel, a field emission display panel, or the like.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make equivalent modifications or variations in accordance with the spirit of the present invention. All should be covered by the following patent application.

100, 200, 20‧‧‧ touch screen

110‧‧‧Substrate

120‧‧‧lower conductive layer

160, 260‧‧‧ upper conductive layer

112‧‧‧Insulation

150, 250‧‧‧ shading layer

114‧‧‧Transparent overlay

140, 240‧‧‧ first transmission line

130, 230‧‧‧ second transmission line

152‧‧‧ first through hole

254, 254'‧‧‧ second through hole

X‧‧‧ first direction

Y‧‧‧second direction

102‧‧‧Edge area

1022‧‧‧ joint area

104‧‧‧Touch display area

162‧‧‧First conductive line

122, 222‧‧‧Second conductive line

142‧‧‧electrode

124, 264‧‧‧Additional conductive lines

170‧‧‧First touch capacitor

2641, 2221‧‧‧ comb structure

2642, 2642', 2222‧‧‧Connecting Department

2641’‧‧‧ Ring Structure

2223‧‧‧Circular

10‧‧‧Touch display device

30‧‧‧ display panel

40‧‧‧ boards

1 is a perspective exploded view of a preferred embodiment of a touch screen of the present invention.

2 is a perspective structural view of the components of the touch screen shown in FIG. 1 combined.

3 is a plan perspective view of the touch screen shown in FIG. 1.

Figure 4 is a cross-sectional view of Figure 3 taken along line IV-IV.

Figure 5 is a plan perspective view of another preferred embodiment of the touch screen of the present invention.

6 is a perspective structural view of the touch screen of FIG. 5.

Figure 7 is a partial enlarged view of Figure 5.

8 to 11 are schematic views of several modified embodiments of Fig. 6.

FIG. 12 is a schematic diagram of a preferred embodiment of a touch display device of the present invention.

100‧‧‧ touch screen

110‧‧‧Substrate

120‧‧‧lower conductive layer

122‧‧‧Second conductive line

124‧‧‧Additional conductive lines

160‧‧‧Upper conductive layer

162‧‧‧First conductive line

112‧‧‧Insulation

150‧‧‧Lighting layer

114‧‧‧Transparent overlay

140‧‧‧First transmission line

142‧‧‧electrode

130‧‧‧second transmission line

152‧‧‧ first through hole

Claims (15)

A touch screen includes: a substrate; a conductive layer disposed on the lower surface of the substrate, including a plurality of second conductive lines extending along a second direction, and at least one additional conductive line extending in the second direction, The at least one additional conductive line is located at an edge region of the touch screen; an insulating layer disposed on the lower conductive layer; at least one first transmission line disposed on the insulating layer; and a shading disposed on the first transmission line a layer, the light shielding layer includes at least one first through hole; and a conductive layer disposed on the light shielding layer, the upper conductive layer includes a plurality of first conductive lines extending along a first direction, the plurality of first conductive lines Intersecting with the plurality of second conductive lines, the at least one first transmission line is electrically connected to one of the plurality of first conductive lines through the at least one first via, wherein one of the plurality of first conductive lines and the at least one An additional conductive line or the at least one first transmission line partially overlaps to form at least one first touch capacitance. The touch screen of claim 1, wherein the touch screen further comprises a transparent cover layer on the upper conductive layer, and the upper conductive layer is directly formed on the transparent cover layer. The touch screen of claim 1, wherein the at least one first through hole corresponds to the at least one first touch capacitor, and the at least one first through hole serves as the at least one first touch Capacitor touch function control. The touch screen of claim 3, wherein the touch function control is a volume control, a music video play control, or a screen slide control. The touch screen of claim 4, wherein the touch screen further comprises at least one second transmission line located in the edge region, the at least one second transmission line being used for electrically connecting the plurality of second conductive layers Conductive line. The touch screen of claim 5, wherein the upper conductive layer further comprises at least one additional conductive line extending along the first direction, the at least one additional conductive line of the upper conductive layer and the second plurality One of the conductive lines or the at least one second transmission line is partially insulated to form at least one second touch capacitor. The touch screen of claim 6, wherein the light shielding layer further comprises at least one second through hole, wherein the at least one second through hole corresponds to the at least one second touch capacitance, and the at least one A touch function control function of a second touch capacitor. The touch screen of claim 5, wherein the edge region further includes a bonding region, and the at least one first transmission line and one of the at least one second transmission line are arranged at the bonding region for use with an external portion. The circuit is electrically connected. The touch screen of claim 8, wherein the number of the at least one first transmission line is plural, the number of the at least one first through hole is a plurality, and the plurality of first conductive lines pass the plural first The through hole is electrically connected to the plurality of first transmission lines. The touch screen of claim 9, wherein the number of the at least one second transmission line is plural, and the plurality of second transmission lines are electrically connected to the plurality of second conductive lines. The touch screen of claim 2, wherein the transparent cover layer is made of glass or acrylic. The touch screen of claim 1, wherein the material of the light shielding layer comprises ink. A touch screen comprising: a lower conductive layer; an insulating layer disposed on the lower conductive layer; a conductive layer disposed on the insulating layer and a transparent cover layer covering the upper conductive layer; wherein At least one first transmission line is further disposed on the insulating layer, and the first a light shielding layer is disposed on the transmission line, the light shielding layer includes at least one first through hole, and the at least one first transmission line is electrically connected to the upper conductive layer through the at least one first through hole, the light shielding layer and the at least one first transmission line The at least one first through hole serves as a touch function control function of the at least one touch capacitor, and the upper and lower conductive layers overlap at the edge region to form at least one touch capacitor. When the position of the at least one first via hole is touched, the capacitance value of the at least one touch capacitor changes and is detected. A method for manufacturing a touch screen, comprising the steps of: providing a transparent substrate as a transparent cover layer of the touch screen; forming an upper conductive layer directly on the transparent cover layer; away from the transparent cover on the upper conductive layer Forming a light shielding layer on one side of the layer and at least one first through hole in the light shielding layer; forming at least one first transmission line on a side of the light shielding layer away from the upper conductive layer, and the at least one first transmission line and the upper portion The conductive layer is electrically connected through the at least one first through hole; an insulating layer is formed on a side of the at least one first transmission line away from the light shielding layer; and a conductive layer is formed on a side of the insulating layer away from the at least one first transmission line; And the upper and lower conductive layers overlap to form a first touch capacitor in an edge region of the touch screen. A touch display device includes a touch screen and a display panel stacked on the touch screen. The touch screen includes a substrate and a lower conductive layer disposed in a direction away from a surface of the substrate. An insulating layer, at least one first transmission line, a light shielding layer and an upper conductive layer, the light shielding layer defining the touch screen with a light-transmissive display area and an edge area of the position of the light-shielding layer, the at least one a transmission line is located in the edge region, the light shielding layer includes at least one first through hole, and the at least one first transmission line is electrically coupled to an external circuit on the one hand, and at least The first via is electrically coupled to the upper conductive layer, and the upper and lower conductive layers overlap to form at least one touch capacitor in the edge region, wherein the at least one first via corresponds to the at least one first touch The at least one first via is used as a touch function control of the at least one first touch capacitor.