CN221303965U - Capacitive touch screen and capacitive touch display device - Google Patents

Abstract

The embodiment of the application discloses a capacitive touch screen and capacitive touch display equipment. The capacitive touch screen comprises a first substrate layer, a first conductive layer, a second substrate layer, a second conductive layer, a display layer and an electromagnetic shielding layer, wherein the first conductive layer comprises a first electrode and a first electrode connecting wire; the second conductive layer is positioned on the inner side of the first conductive layer and comprises a second electrode and a second electrode connecting wire; the display layer is arranged on the inner side of the second conductive layer, a first electromagnetic shielding layer is arranged between the first conductive layer and the second conductive layer, and the orthographic projection of the first electromagnetic shielding layer on the display layer at least covers part of the non-display area. According to the embodiment of the application, the first electromagnetic shielding layer is covered between the first conductive layer and the second conductive layer, so that the problem that crosstalk possibly exists between the first electrode connecting wire and the second electrode connecting wire is solved.

Description

Capacitive touch screen and capacitive touch display device

Technical Field

The present application relates to the field of touch screens, and in particular, to a capacitive touch screen and a capacitive touch display device.

Background

In the related art, a capacitive touch screen has TX electrodes (transmitting electrodes) and RX electrodes (receiving electrodes) disposed opposite to each other on a side of a display layer near a cover plate, and an insulating layer is provided between the two electrodes, so that a mutual capacitance exists between the two electrodes, and at least one side edges of the TX electrodes and the RX electrodes are used for leading out electrode leads connected to the control plate of the touch screen. When an external conductive object approaches or touches, the mutual capacitance between the TX electrode and the RX electrode is changed, so that specific touch coordinates can be identified.

When the lead wire is used, the electrode lead wires of the TX electrode and the RX electrode are led out from the touch screen in a beam nearby, and then the FPC connecting wire is connected to the control board. In addition, crosstalk may occur at the connection of the TX electrode lead and the RX electrode lead to the control board.

Disclosure of utility model

The embodiment of the application provides a capacitive touch screen and capacitive touch display equipment, which can solve the problem of crosstalk between a TX electrode and an RX electrode.

In a first aspect, an embodiment of the present application provides a capacitive touch screen, including:

a first substrate layer having a first outer surface and a first inner surface;

The first conductive layer is arranged on the first outer surface or the first inner surface of the first substrate layer, and is provided with a first electrode connecting wire and a plurality of rows of first electrodes electrically connected with the first electrode connecting wire, and the first conductive layer is an RX conductive layer or a TX conductive layer;

The second substrate layer is arranged on the inner side of the first substrate layer and is provided with a second outer surface facing the first inner surface of the first substrate layer and a second inner surface facing away from the first inner surface of the first substrate layer;

The second conductive layer is arranged on the second outer surface or the second inner surface of the second substrate layer, and is provided with a second electrode connecting wire and a plurality of rows of second electrodes electrically connected with the second electrode connecting wire, and the second conductive layer is a TX conductive layer or an RX conductive layer corresponding to the first conductive layer;

The display layer is positioned on the inner side of the second substrate layer, the display layer comprises a display area and a non-display area, and orthographic projections of the first electrode and the second electrode on the display layer are positioned in the display area; the method comprises the steps of,

The electromagnetic shielding layer comprises a first electromagnetic shielding layer, the first electromagnetic shielding layer is arranged between the first conductive layer and the second conductive layer, and orthographic projection of the first electromagnetic shielding layer on the display layer at least covers part of the non-display area.

In some embodiments of the present application, each column of first electrodes includes a plurality of first electrode blocks connected in series, and the first electrode blocks at the ends of each column of first electrodes are electrically connected to first electrode connecting lines; each row of second electrodes comprises a plurality of second electrode blocks connected in series, and the second electrode blocks at the tail end of each row of second electrodes are electrically connected with a second electrode connecting wire; the front projection of each column of first electrodes on the display layer intersects the front projection of each row of second electrodes on the display layer.

In some embodiments of the present application, the first electrode connecting line has a first folded line segment corresponding to the non-display region, the second electrode connecting line has a second folded line segment corresponding to the non-display region, the first folded line segment and the second folded line segment have portions parallel to each other, and the orthographic projection of the first electromagnetic shielding layer on the display layer covers at least the orthographic projection of the portions parallel to each other on the display layer.

In some embodiments of the present application, the first electrode connection line includes a first FPC connection line and a plurality of first electrode leads electrically connected thereto, at least a portion of the first FPC connection line is located outside the first substrate layer, the first electrode lead includes a first folded line segment, the first electrode lead is electrically connected to a corresponding first electrode thereof, and the first electrode lead and the first electrode are simultaneously disposed on a first inner surface or a first outer surface of the first substrate layer; the second electrode connecting wire comprises a second FPC connecting wire and a plurality of second electrode leads electrically connected with the second FPC connecting wire, at least part of the second FPC connecting wire is positioned outside the second substrate layer, the second electrode leads comprise second folded line segments, the second electrode leads are electrically connected with corresponding second electrodes, and the second electrode leads and the second electrodes are arranged on the second inner surface or the second outer surface of the second substrate layer.

In some embodiments of the application, the touch screen further comprises a control panel, the control panel being located outside the display layer, the control panel being disposed adjacent to the non-display area of the display layer; the first FPC connecting wire is connected with each first folded line segment and the control board, and the second FPC connecting wire is connected with each second folded line segment and the control board.

In some embodiments of the present application, an optical adhesive layer is disposed between the first conductive layer and the second conductive layer, and between the second conductive layer and the display layer; and/or the outer side of the first substrate layer is provided with a cover plate.

In some embodiments of the application, the electromagnetic shielding layer further comprises a second electromagnetic shielding layer disposed between the second conductive layer and the display layer; and/or, the electromagnetic shielding layer further comprises a third electromagnetic shielding layer, and the third electromagnetic shielding layer is arranged outside the first conductive layer.

In some embodiments of the present application, the electromagnetic shielding layer is attached to the surface of the substrate layer or the display layer corresponding thereto through a sputtering process, a pasting process, a coating process, or an imprinting process; and/or the electromagnetic shielding layer is made of ITO, metal grids, silver nanowires, copper foil or aluminum foil.

In some embodiments of the application, the electromagnetic shielding layer has a connection portion capable of electrically connecting with a GND network or a constant voltage network.

In a second aspect, the present application provides a capacitive touch display device, including a capacitive touch display device body and a capacitive touch screen, where the capacitive touch screen is disposed on the capacitive touch display device body.

The beneficial effects are that: the first electromagnetic shielding layer is arranged between the first conductive layer and the second conductive layer, so that mutual capacitance between the second electrode connecting wire and the first electrode connecting wire can be shielded, crosstalk can not be generated between the second electrode connecting wire and the first electrode connecting wire, and misoperation is avoided; through setting up first electromagnetic shield layer, can make the second electrode connecting wire walk the line in touch-sensitive screen inside as far as possible to can effectively reduce connecting wire length and reduce cost.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application and that other drawings may be obtained from them without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a capacitive touch screen in the related art;

FIG. 2 is a schematic diagram of a related art structure reflecting the connection relationship between the first electrode connection line, the second electrode connection line and the control board;

FIG. 3 is a schematic structural diagram showing the connection relationship between the second electrode connection line, the first electrode connection line and the control board according to the embodiment of the present application;

FIG. 4 is an enlarged partial schematic view of the portion indicated by P in FIG. 3;

FIG. 5 is a schematic diagram of a capacitive touch screen according to an embodiment of the present application (the first electromagnetic shielding layer is disposed on the substrate layer and covers only the non-display area);

Fig. 6 is a schematic structural diagram of a capacitive touch screen according to an embodiment of the present application (the first electromagnetic shielding layer is disposed on the optical adhesive layer and covers only the non-display area);

FIG. 7 is a schematic structural diagram of the first electrode, the second electrode, and the first electromagnetic shielding layer according to the embodiment of the present application;

FIG. 8 is a schematic structural diagram of a capacitive touch screen (including a first electromagnetic shielding layer and a second electromagnetic shielding layer) according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a capacitive touch screen according to an embodiment of the present application (including a first electromagnetic shielding layer, a second electromagnetic shielding layer, and a third electromagnetic shielding layer);

FIG. 10 is a schematic diagram showing the positional relationship between a first substrate layer and a second substrate layer according to an embodiment of the present application.

Reference numerals illustrate:

The prior art comprises the following steps: 1', capacitive touch screen; 12', a first substrate layer; 13', an RX conductive layer; 131', RX electrodes; 1311', RX electrode blocks; 132', RX electrode connection lines; 14', a second substrate layer; 15', TX conductive layer; 151', TX electrodes; 1511', TX electrode block; 152', TX electrode connection lines; 1521', TX electrode leads; 1522', a second FPC connection line; 17', a control board;

The embodiment of the application comprises the following steps: 1. a capacitive touch screen; 11. a cover plate; 111. a light-emitting surface; 12. a first substrate layer; 121. a first outer surface; 122. a first inner surface; 13. a first conductive layer; 131. a first electrode; 1311. a first electrode block; 132. a first electrode connection line; 1321. a first electrode lead; 1322. a first FPC connection line; 1323. a first folded section; 14. a second substrate layer; 141. a second outer surface; 142. a second inner surface; 15. a second conductive layer; 151. a second electrode; 1511. a second electrode block; 152. a second electrode connection line; 1521. a second electrode lead; 1522. a second FPC connection line; 1523. a second folded section; 16. a display layer; 161. a display area; 162. a non-display area; 17. a control board; 18. an optical adhesive layer; 19. an electromagnetic shielding layer; 191. a first electromagnetic shielding layer; 192. a second electromagnetic shielding layer; 193. a third electromagnetic shielding layer; 2. and a connecting part.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

As shown in fig. 1 and 2, in the related art, the capacitive touch screen 1 'generally generates a mutual capacitance between the RX conductive layer 13' disposed on the first substrate layer 12 'and the TX conductive layer 15' disposed on the second substrate layer 14', and the control board 17' recognizes and acquires the touch coordinates according to the mutual capacitance change.

The RX conductive layer 13 'is connected to the control board 17' through the RX electrode connection line 132', and the TX conductive layer 15' is connected to the control board 17 'through the TX electrode connection line 152'. The RX conductive layer 13' includes a plurality of columns of RX electrodes 131', each column of RX electrodes 131' includes a plurality of RX electrode blocks 1311', the TX conductive layer 15' includes a plurality of rows of TX electrodes 151', each row of TX electrodes 151' includes a plurality of TX electrode blocks 1511', the RX electrodes 131' arranged in columns and the TX electrodes 151' arranged in rows vertically intersect, as viewed from the thickness direction of the touch screen 1', and adjacent RX electrode blocks 1311' and TX electrode blocks 1511' constitute a mutual capacitance. When an external conductive object (such as a human finger) is brought close to or touched, a mutual capacitance change between the RX electrode block 1311' and the TX electrode block 1511' is caused, and the control board 17' determines specific touch coordinates according to the mutual capacitance change.

The TX electrode connection line 152 'includes a second FPC connection line 1522' and a plurality of TX electrode leads 1521 'electrically connected thereto, each row of TX electrodes 151' being electrically connected to its corresponding TX electrode lead 1521', the TX electrode leads 1521' being bundled and led out and connected to the control board 17 'through the second FPC connection line 1522'. Since the distance between the TX electrode lead 1521' and the control board 17' is long, the length of the second FPC connection line 1522' is long, thereby increasing costs. Meanwhile, crosstalk may occur at portions of the TX electrode connection line 152' and the RX electrode connection line 132' connected to the control board 17'.

As shown in fig. 3 to 10, in a first aspect, an embodiment of the present application provides a capacitive touch screen 1. The capacitive touch screen 1 includes a first substrate layer 12, a first conductive layer 13, a second substrate layer 14, a second conductive layer 15, a display layer 16, and an electromagnetic shielding layer 19. The first substrate layer 12, the second substrate layer 14 and the display layer 16 are arranged from outside to inside, and the side facing the user is the outside. The first substrate layer 12 has a first outer surface 121 and a first inner surface 122, the first conductive layer 13 is disposed on the first outer surface 121 or the first inner surface 122 of the first substrate layer 12, the first conductive layer 13 has a first electrode connection line 132 and a plurality of rows of first electrodes 131 electrically connected thereto, and the first electrodes 131 in each row are spaced apart in the first direction. The second substrate layer 14 is disposed inside the first substrate layer 12, the second substrate layer 14 has a second outer surface 141 facing the first inner surface 122 of the first substrate layer 12 and a second inner surface 142 facing away from the first inner surface 122 of the first substrate layer 12, the second conductive layer 15 is disposed on the second outer surface 141 or the second inner surface 142 of the second substrate layer 14, the second conductive layer 15 has a second electrode connection line 152 and a plurality of rows of second electrodes 151 electrically connected thereto, and the rows of second electrodes 151 are spaced apart in the second direction. The display layer 16 is disposed on the inner side of the second substrate layer 14, the display layer 16 includes a display area 161 and a non-display area 162, the orthographic projections of the first electrode 131 and the second electrode 151 on the display layer 16 are located in the display area 161, the electromagnetic shielding layer 19 includes a first electromagnetic shielding layer 191, the first electromagnetic shielding layer 191 is disposed between the first conductive layer 13 and the second conductive layer 15, and the orthographic projection of the first electromagnetic shielding layer 191 on the display layer 16 covers at least a portion of the non-display area 162.

When the first conductive layer 13 is an RX conductive layer, the first electrode 131 is an RX electrode, and the first electrode connection line 132 is an RX electrode connection line; the second conductive layer 15 is correspondingly a TX conductive layer, the second electrode 151 is a TX electrode, and the second electrode connection line 152 is a TX electrode connection line. When the first conductive layer 13 is a TX conductive layer, the first electrode 131 is a TX electrode, and the first electrode connection line 132 is a TX electrode connection line; the second conductive layer 15 is correspondingly an RX conductive layer, the second electrode 151 is an RX electrode, and the second electrode connection line 152 is an RX electrode connection line.

The display area 161 of the display layer 16 is used for displaying images. The first outer surface 121 of the first base material layer 12 corresponds to the display region 161 and is a touch region, and corresponds to the non-display region 162 and is a non-touch region.

By disposing the first electromagnetic shielding layer 191 between the first conductive layer 13 and the second conductive layer 15, mutual capacitance between the first electrode lead 1321 and the second electrode lead 1521 can be shielded, so that mutual crosstalk between the first electrode connection line 132 and the second electrode connection line 152 can not occur, all mutual capacitance values are ensured to be derived from a set touch area, and misoperation of the electrode lead area is avoided. Meanwhile, by providing the first electromagnetic shielding layer 191, the lengths of the first electrode connection line 132 and the second electrode connection line 152 can be effectively reduced, and thus the cost can be effectively reduced.

For the capacitive touch screen 1, the first substrate layer 12 and the second substrate layer 14 may be made of a light guiding material, and the shape thereof may be circular or square, etc., and the material and shape thereof are not limited. The first electrode 131 and the second electrode 151 may be made of a conductive material, and the material thereof is not limited herein. The display layer 16 may be a liquid crystal display layer or the like, and light generated by the inside of the display layer 16 finally diverges to the outside through the first substrate layer 12. The display layer 16 may be an OLED display layer, a TFT display layer, or the like, and the kind thereof is not limited.

For the first electromagnetic shielding layer 191, it may cover the first inner surface 122 of the first substrate layer 12 portion and be on a different surface of the first substrate layer 12 than the first conductive layer 13; or the first electromagnetic shielding layer 191 may cover the second outer surface 141 of the portion of the second substrate layer 14 and be on a different surface of the second substrate layer 14 than the second conductive layer 15; or a portion of the optical cement layer 18 between the first conductive layer 13 and the second conductive layer 15. The front projection of the first electromagnetic shielding layer 191 onto the display layer 16 may cover only the non-display region 162 or only a portion of the non-display region 162. As shown in fig. 7, the hatched portion thereof represents the first electromagnetic shielding layer 191, the orthographic projection thereof on the display layer 16 covers only the left half of the non-display area 162, which does not cover the non-display area 162 completely.

In a specific structure, the first conductive layer 13 is disposed on the first outer surface 121 of the first substrate layer 12, where the first electromagnetic shielding layer 191 may be disposed on the first inner surface 122 of the first substrate layer 12, and the second conductive layer 15 may be disposed on the second outer surface 141 of the second substrate layer 14, where the first electromagnetic shielding layer 191 is disposed between the first conductive layer 13 and the second conductive layer 15. The first electromagnetic shield layer 191 may cover only a portion of the first inner surface 122 and its orthographic projection onto the display layer 16 covers at least a portion of the non-display region 162.

In another specific structure, the first conductive layer 13 is disposed on the first outer surface 121 of the first substrate layer 12, where the first electromagnetic shielding layer 191 may be disposed on the first inner surface 122 of the first substrate layer 12, and the second conductive layer 15 may be disposed on the second inner surface 142 of the second substrate layer 14, where the first electromagnetic shielding layer 191 is disposed between the first conductive layer 13 and the second conductive layer 15. The first electromagnetic shield layer 191 covers only a portion of the first inner surface 122 and its orthographic projection onto the display layer 16 covers at least a portion of the non-display region 162.

In another specific structure, the first conductive layer 13 is disposed on the first outer surface 121 of the first substrate layer 12, the second conductive layer 15 is disposed on the second inner surface 142 of the second substrate layer 14, and the first electromagnetic shielding layer 191 is disposed on the second outer surface 141 of the second substrate layer 14, and the first electromagnetic shielding layer 191 is also disposed between the first conductive layer 13 and the second conductive layer 15. The first electromagnetic shielding layer 191 covers only a portion of the second outer surface 141 and its orthographic projection onto the display layer 16 covers at least a portion of the non-display area 162.

In another specific structure, the first conductive layer 13 is disposed on the first inner surface 122 of the first substrate layer 12, the second conductive layer 15 is disposed on the second inner surface 142 of the second substrate layer 14, and the first electromagnetic shielding layer 191 is disposed on the second outer surface 141 of the second substrate layer 14, and the first electromagnetic shielding layer 191 is also disposed between the first conductive layer 13 and the second conductive layer 15. The first electromagnetic shielding layer 191 covers only a portion of the second outer surface 141 and its orthographic projection onto the display layer 16 covers at least a portion of the non-display area 162.

In another specific structure, the first conductive layer 13 is disposed on the first inner surface 122 of the first substrate layer 12, the second conductive layer 15 is disposed on the second outer surface 141 of the second substrate layer 14, and the first electromagnetic shielding layer 191 is disposed on the optical adhesive layer 18 between the first conductive layer 13 and the second conductive layer 15. The first electromagnetic shielding layer 191 covers only a portion of the optical cement layer 18 and its orthographic projection onto the display layer 16 covers at least a portion of the non-display region 162.

The first electrode connection line 132 may include a first FPC connection line 1322 and a plurality of first electrode leads 1321 electrically connected thereto, at least a portion of the first FPC connection line 1322 may be located outside the first substrate layer 12, the first FPC connection line 1322 is electrically connected to the first electrode leads 1321, the first electrode leads 1321 include first folded line segments 1323, the first electrode leads 1321 and the first electrodes 131 may be simultaneously disposed on the first inner surface 122 or the first outer surface 121 of the first substrate layer 12, and each row of the first electrodes 131 is connected to one first electrode lead 1321. The second electrode connection line 152 may include a second FPC connection line 1522 and a plurality of second electrode leads 1521 electrically connected thereto, at least a portion of the second FPC connection line 1522 may be located outside the second substrate layer 14, the second FPC connection line 1522 is electrically connected to the second electrode leads 1521, the second electrode leads 1521 include second folded line segments 1523, the second electrode leads 1521 and the second electrodes 151 may be simultaneously disposed on the second inner surface 142 or the second outer surface 141 of the second substrate layer 14, and each row of the second electrodes 151 is connected to one second electrode lead 1521.

Each column of first electrodes 131 includes a plurality of first electrode blocks 1311 connected in series, the first electrodes 131 of each column are parallel to each other, and the first electrode blocks 1311 at the end of each column of first electrodes 131 are electrically connected to the corresponding first electrode leads 1321. Each row of second electrodes 151 includes a plurality of second electrode blocks 1511 connected in series, each row of second electrodes 151 is parallel to each other, and the second electrode blocks 1511 at the end of each row of second electrodes 151 are electrically connected to the corresponding second electrode leads 1521. The front projection of each column of first electrodes 131 onto the display layer 16 perpendicularly intersects the front projection of each row of second electrodes 151 onto the display layer 16. Mutual capacitance is generated between the adjacent first electrode block 1311 and second electrode block 1511. When a touching object touches the touch area, the coupling of the two electrode blocks near the touch point is affected, and the capacitance between the two electrode blocks is changed. In other alternative structures, the orthographic projections of the first electrode 131 and the second electrode 151 on the display layer 16 may be not perpendicular but have an acute or obtuse included angle.

For the first electrode block 1311 and the second electrode block 1511, two adjacent second electrode blocks 1511 are connected by a second node position, two adjacent first electrode blocks 1311 are connected by a first node position, and the orthographic projection of the second node position on the display layer 16 intersects the orthographic projection of the first node position on the display layer 16. The second electrode block 1511 and the first electrode block 1311 closest to the corners of the display area 161 may each have a half or full shape, and the first electrode block 1311 and the second electrode block 1511 may have a diamond, triangle, bar shape, or the like, and the shapes of the first electrode block 1311 and the second electrode block 1511 are not limited herein.

As shown in fig. 3 and fig. 4, in a specific structure, the second electrode block 1511 and the first electrode block 1311 are diamond-shaped, and are located at the corners of the display area 161, and the shapes and sizes of the first electrode block 1311 and the second electrode block 1511 are the same, so that adjacent positions of the second electrode block 1511 and the first electrode block 1311 are relatively flat, and the mutual capacitance formed between the second electrode block 1511 and the first electrode block 1311 is convenient to control.

As shown in fig. 3 and 7, the first electrode connection line 132 has a first line segment 1323 corresponding to the non-display region 162, the first line segment 1323 may include a straight line segment extending in a first direction and a straight line segment extending in a second direction, the second electrode connection line 152 has a second line segment 1523 corresponding to the non-display region 162, the second line segment 1523 may include a straight line segment extending in the first direction and a straight line segment extending in the second direction, and the straight line segments extending in the same direction of the first line segment 1323 and the second line segment 1523 are parallel to each other. The front projection of the first electromagnetic shielding layer 191 on the display layer 16 covers at least the front projection of the portion of the first folded line segment 1323 and the second folded line segment 1523 that are parallel to each other on the display layer 16. By providing the first electromagnetic shielding layer 191, mutual capacitive coupling of the parallel straight line segments can be shielded, and further, false reporting of coordinate points or extra noise caused by touching the non-display region 162 can be avoided. The non-display area 162 may be located below the display area 161. The first electrode lead 1321 may be drawn from the lower side edge of the first electrode 131, and the second electrode lead 1521 may be drawn from the left side edge of the second electrode 151.

The capacitive touch screen 1 further comprises a control panel 17, the control panel 17 being located outside the display layer 16, the control panel 17 being located adjacent to the non-display area 162 of the display layer 16. The straight line segment of each first folded line segment 1323 extending in the second direction is connected to the control board 17 through a first FPC connection line 1322, and the straight line segment of each second folded line segment 1523 extending in the second direction is connected to the control board 17 through a second FPC connection line 1522.

In a specific structure, one end of the FPC connecting wire is provided with an interface, the interface is in plug-in fit with an adapter plate arranged on the touch screen 1, the adapter plate is connected with each electrode lead, and the other end of the FPC connecting wire is fixed with the control board 17 through welding or plug-in and other modes.

As shown in fig. 8 and 9, in some embodiments, an optical adhesive layer 18 is disposed between the first conductive layer 13 and the second conductive layer 15, and between the second conductive layer 15 and the display layer 16; and/or the first substrate layer 12 has a cover plate 11 on the outside. Specifically, the first outer surface 121 of the first substrate layer 12 is fixed by the optical adhesive layer 18 in an insulating manner, the first inner surface 122 of the first substrate layer 12 is fixed by the optical adhesive layer 18 to the second outer surface 141 of the second substrate layer 14, and the second inner surface 142 of the second substrate layer 14 is fixed by the optical adhesive layer 18 to the display layer 16. The optical adhesive layer 18 is made of a light-transmitting material, so that light of the display layer 16 can exit through the first substrate layer 12. The optical cement layer 18 may be provided in full coverage, i.e. the optical cement layer 18 may cover the corresponding inner or outer surface. In an alternative configuration, the optical cement layer 18 may be provided on four sides of the substrate layer surface and the outer surface of the display layer 16. By providing the optical adhesive layer 18, not only light transmission and fixing of two adjacent layers can be achieved, but also insulation between the first electrode layer 13 and the second electrode layer 15 can be achieved.

As shown in fig. 8 and 9, in some embodiments, electromagnetic shielding layer 19 further includes a second electromagnetic shielding layer 192, second electromagnetic shielding layer 192 being disposed between second conductive layer 15 and display layer 16; and/or, the electromagnetic shielding layer 19 further includes a third electromagnetic shielding layer 193, and the third electromagnetic shielding layer 193 is disposed outside the first conductive layer 13.

In a specific structure, the first conductive layer 13 is disposed on the first inner surface 122 of the first substrate layer 12, the second conductive layer 15 is disposed on the second inner surface 142 of the second substrate layer 14, the second outer surface 141 of the second substrate layer 14 is provided with the first electromagnetic shielding layer 191, and the first outer surface 121 of the first substrate layer 12 is provided with the third electromagnetic shielding layer 193. The third electromagnetic shield layer 193 may be provided so as to cover the entire area or only the non-touch area. The third electromagnetic shielding layer 193 and the first conductive layer 13 are disposed on different surfaces of the first substrate layer 12, and by disposing the third electromagnetic shielding layer 193, it is possible to avoid capacitance variation or electrostatic interference on the first electrode lead 1321 caused by the touch object approaching the first substrate layer 12, and when the third electromagnetic shielding layer 193 completely covers the first outer surface 121 of the first substrate layer 12, the square resistance of the conductivity is greater than 10++3Ω/≡.

In another specific structure, the first conductive layer 13 is disposed on the first outer surface 121 of the first substrate layer 12, the first inner surface 122 of the first substrate layer 12 is provided with the first electromagnetic shielding layer 191, the second conductive layer 15 is disposed on the second outer surface 141 of the second substrate layer 14, and the outer surface of the display layer 16 is provided with the second electromagnetic shielding layer 192. The second electromagnetic shielding layer 192 may be disposed entirely or only over the non-display region 161 of the display layer 16, and similarly, the second electromagnetic shielding layer 192 may cover the second inner surface 142 of the second substrate layer 14 and be on a different surface of the second substrate layer 14 than the second conductive layer 15. By providing the second electromagnetic shielding layer 192, interference from the display layer 16 can be shielded, ensuring a higher signal-to-noise ratio of the touch screen 1.

In another specific structure, the first conductive layer 13 is disposed on the first inner surface 122 of the first substrate layer 12, the second conductive layer 15 is disposed on the second inner surface 142 of the second substrate layer 14, the first electromagnetic shielding layer 191 is disposed on the second outer surface 141 of the second substrate layer 14, the second electromagnetic shielding layer 192 is disposed between the outer surface of the display layer 16 and the optical adhesive layer 18 outside thereof, and the third electromagnetic shielding layer 193 is disposed on the first outer surface 121 of the first substrate layer 12. The electromagnetic shield layers 19 may be provided so as to cover the entire surfaces, or only the positions where crosstalk occurs.

As for the electromagnetic shielding layer 19, it may be attached to the surface of the substrate layer or the display layer 16 corresponding thereto by a sputtering process, an adhering process, a coating process, or an embossing process. The conductive layer may also be attached to the surface of the substrate layer corresponding thereto by a sputtering process, a pasting process, a coating process or an embossing process. As shown in fig. 9, in one specific structure, the first conductive layer 13 may be attached to the first inner surface 122 of the first substrate layer 12 through a sputtering process, the second conductive layer 15 is attached to the second inner surface 142 of the second substrate layer 14 through a sputtering process, the first electromagnetic shielding layer 191 is attached to the first outer surface 141 of the second substrate layer 14 through a sputtering process, the second electromagnetic shielding layer 192 is attached to the surface of the display layer 16 through a sputtering process, and the third electromagnetic shielding layer 193 is attached to the first outer surface 121 of the first substrate layer 12 through a sputtering process.

In some embodiments, the material of the electromagnetic shielding layer 19 may be ITO, a metal mesh, silver nanowires, copper foil or aluminum foil, which is not limited herein to the material of the electromagnetic shielding layer 19. In a specific structure, the first conductive layer 13 is disposed on the first outer surface 121 of the first substrate layer 12, and the second conductive layer 15 is disposed on the second outer surface 141 of the second substrate layer 14, so that an ITO conductive layer can be sputtered on the first inner surface 122 of the first substrate layer 12 and the outer surface of the display layer 16, and the ITO conductive layer can be partially disposed in a covering manner, and the ITO is a transparent material. In another specific structure, since the front projection of the first electromagnetic shielding layer 191 on the display layer 16 covers the entire non-display area 162, or at least covers the front projection of the portion where the first folded line segment 1323 of the first electrode lead 1321 of the first conductive layer 13 and the second folded line segment 1523 of the second electrode lead 1521 of the second conductive layer 15 are parallel to each other on the display layer 16, the first electromagnetic shielding layer 191 may be a conductive opaque material such as copper foil and aluminum foil.

In some embodiments, the electromagnetic shielding layer 19 has a connection 2 that can be electrically connected to a GND network or a constant voltage network. In a specific structure, the connection portion 2 may be a lead, one end of which is connected to the electromagnetic shielding layer 19, and the other end of which is connected to the GND network. In another specific structure, the electromagnetic shielding layer 19 can be connected to a constant voltage network, and the electromagnetic shielding effect can be ensured by connecting the electromagnetic shielding layer 19 to the GND network or the constant voltage network through the connection portion.

In a second aspect, an embodiment of the present application provides a capacitive touch display device, where the capacitive touch display device includes a capacitive touch display device body and a capacitive touch screen 1, where the capacitive touch screen 1 is provided on the capacitive touch display device body. When the capacitive touch screen 1 is touched, a mutual capacitance between the first conductive layer 13 and the second conductive layer 15 is changed, and the control board 17 knows the touch coordinates of the corresponding position through the change of the capacitance of the corresponding position.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present application and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims (10)

1. A capacitive touch screen, comprising:

A first substrate layer having a first outer surface and a first inner surface;

The first conductive layer is arranged on the first outer surface or the first inner surface of the first substrate layer, the first conductive layer is provided with a first electrode connecting wire and a plurality of rows of first electrodes electrically connected with the first electrode connecting wire, and the first conductive layer is an RX conductive layer or a TX conductive layer;

A second substrate layer disposed inside the first substrate layer, the second substrate layer having a second outer surface facing the first inner surface of the first substrate layer and a second inner surface facing away from the first inner surface of the first substrate layer;

The second conductive layer is arranged on the second outer surface or the second inner surface of the second substrate layer, the second conductive layer is provided with a second electrode connecting wire and a plurality of rows of second electrodes electrically connected with the second electrode connecting wire, and the second conductive layer is a TX conductive layer or an RX conductive layer corresponding to the first conductive layer;

The display layer is positioned on the inner side _, of the second substrate layer, the display layer comprises a display area and a non-display area, and orthographic projections of the first electrode and the second electrode on the display layer are positioned in the display area; the method comprises the steps of,

The electromagnetic shielding layer comprises a first electromagnetic shielding layer, the first electromagnetic shielding layer is arranged between the first conductive layer and the second conductive layer, and the orthographic projection of the first electromagnetic shielding layer on the display layer at least covers part of the non-display area.

2. The capacitive touch screen of claim 1, wherein each column of the first electrodes comprises a plurality of first electrode blocks connected in series, the first electrode blocks at the ends of each column of the first electrodes being electrically connected to the first electrode connection lines; each row of the second electrodes comprises a plurality of second electrode blocks connected in series, and the second electrode blocks at the tail end of each row of the second electrodes are electrically connected with the second electrode connecting wire; the front projection of each column of the first electrode on the display layer intersects with the front projection of each row of the second electrode on the display layer.

3. The capacitive touch screen of claim 1, wherein the first electrode connection line has a first fold line segment corresponding to the non-display area, the second electrode connection line has a second fold line segment corresponding to the non-display area, the first fold line segment and the second fold line segment have portions that are parallel to each other, and an orthographic projection of the first electromagnetic shield layer onto the display layer covers at least an orthographic projection of the portions that are parallel to each other onto the display layer.

4. A capacitive touch screen according to claim 3, wherein the first electrode connection line comprises a first FPC connection line and a plurality of first electrode leads electrically connected thereto, at least part of the first FPC connection line is located outside the first substrate layer, the first electrode leads comprise the first folded line segments, the first electrode leads are electrically connected to the corresponding first electrodes thereof, and the first electrode leads and the first electrodes are simultaneously provided on the first inner surface or the first outer surface of the first substrate layer; the second electrode connecting wire comprises a second FPC connecting wire and a plurality of second electrode leads electrically connected with the second FPC connecting wire, at least part of the second FPC connecting wire is positioned outside the second substrate layer, the second electrode leads comprise second folded line segments, the second electrode leads are electrically connected with the second electrodes corresponding to the second electrode leads, and the second electrode leads and the second electrodes are simultaneously arranged on the second inner surface or the second outer surface of the second substrate layer.

5. The capacitive touch screen of claim 4, further comprising a control panel located outside the display layer, the control panel disposed adjacent to a non-display area of the display layer; the first FPC connecting wire is connected with each first folded line segment and the control board, and the second FPC connecting wire is connected with each second folded line segment and the control board.

6. The capacitive touch screen of claim 1, wherein an optical adhesive layer is disposed between the first conductive layer and the second conductive layer, and between the second conductive layer and the display layer; and/or the outer side of the first substrate layer is provided with a cover plate.

7. The capacitive touch screen of claim 1, wherein the electromagnetic shield layer further comprises a second electromagnetic shield layer disposed between the second conductive layer and the display layer; and/or, the electromagnetic shielding layer further comprises a third electromagnetic shielding layer, and the third electromagnetic shielding layer is arranged outside the first conductive layer.

8. The capacitive touch screen according to claim 7, wherein the electromagnetic shielding layer is attached to a surface of the substrate layer or the display layer corresponding thereto by a sputtering process, a pasting process, a coating process, or an embossing process; and/or the electromagnetic shielding layer is made of ITO, metal grids, silver nanowires, copper foil or aluminum foil.

9. The capacitive touch screen of claim 7, wherein the electromagnetic shield layer has a connection portion capable of electrically connecting with a GND network or a constant voltage network.

10. A capacitive touch display device, comprising a capacitive touch display device body and the capacitive touch screen of any one of claims 1-9, wherein the capacitive touch screen is disposed on the capacitive touch display device body.