TWI644243B - touch screen - Google Patents

Abstract

A touch screen includes a cover plate, a decoration layer, a dielectric layer, a sensor structure, and peripheral wiring. The cover plate includes a touch area and a frame area; the decoration layer is disposed on an inner surface of the frame area of the cover plate; the dielectric layer is located on a side of the decoration layer away from the cover plate; The sensor structure is set corresponding to the touch area; the peripheral wiring corresponds to the frame area, and is located on the side of the dielectric layer away from the decorative layer, and the peripheral wiring is connection. The decoration layer includes a shielding portion and an instruction portion, the instruction portion has a predetermined text or pattern, the shielding portion is located around the instruction portion, and is viewed in a direction perpendicular to the touch screen. A portion overlaps with the indicating portion, the dielectric layer includes a slot, and the slot is located between the first portion of the peripheral wiring and the indicating portion, and the dielectric constant of the medium in the slot is smaller than The dielectric constant of the dielectric layer is described.

Description

touch screen

The invention relates to a touch screen.

At present, touch technology has been widely used in display devices of various electronic products, so that users can use touch to control the electronic products. In order to make the electrodes in the touch area difficult to detect, the touch panel generally uses indium tin oxide (ITO) to form transparent touch electrodes. However, as the application of touch panels is gradually moving toward large size, the technology using indium tin oxide transparent electrodes has technical problems such as large resistance, slow touch response speed, requiring multiple process steps and high production costs. A metal mesh (Metal Mesh) touch electrode is a better solution for replacing indium tin oxide transparent touch electrodes.

Generally, a conventional touch screen generally includes a protective cover, and a central area of the protective cover is a transparent touch area, and a periphery of the touch area is a frame area. The touch area is provided with a sensor structure for detecting the position of the touch action, and the frame area is provided with a decoration layer to shield the peripheral wiring connected to the sensor structure. Specifically, the decoration layer may include an instruction portion forming a predetermined character or pattern and a shielding portion provided around the instruction portion, and the predetermined character or pattern may be a trademark or a specific logo.

However, since the indicator portion and the peripheral traces are both located in the frame area and separated by a dielectric layer, when the two overlap, a large parasitic capacitance may be generated, which may affect the yield and Control performance and other adverse effects, it is necessary to improve.

In view of this, it is necessary to provide a touch screen that can eliminate the adverse effects caused by the overlap of the indicator portion and the surrounding traces.

A touch screen includes a cover plate including a touch area and a border area located around the touch area; a decoration layer disposed on an inner surface of the frame area of the cover plate; and a dielectric layer located far from the decoration layer. A side of the cover plate; a sensor structure corresponding to the touch area setting; and a peripheral wiring corresponding to the frame area and located on a side of the dielectric layer away from the decoration layer, the peripheral wiring And is electrically connected to the sensor structure; wherein the decorative layer includes a shielding portion and an indication portion, the indication portion forms a predetermined character or pattern, and the shielding portion is located around the indication portion and extends along the vertical direction of the touch. Looking at the direction of the control screen, the first portion of the peripheral wiring overlaps the indicating portion, the dielectric layer includes a slot, and the slot is located between the first portion of the peripheral routing and the indicating portion, The dielectric constant of the medium in the slot is smaller than the dielectric constant of the dielectric layer.

In one embodiment, the medium in the slot is air.

In one embodiment, the dielectric constant of the medium in the slot is less than two.

In one embodiment, an edge of the indicator portion and an edge of the dielectric layer have a predetermined interval.

In one embodiment, the predetermined interval is greater than 0.15 mm.

In one embodiment, the insulation resistance of the material of the indicating portion is less than 10 ¹² ohms.

In one embodiment, the dielectric layer is an optical adhesive layer.

In one embodiment, the dielectric layer is further located between the sensor structure and the cover plate.

In one embodiment, the sensor structure includes a plurality of electrodes, and the number of peripheral traces is a plurality. Each electrode is connected to a corresponding one of the peripheral traces. When viewed in a direction perpendicular to the touch screen, The first portion of the plurality of peripheral traces overlaps the indication portion.

In one embodiment, the plurality of electrodes include a plurality of first electrodes extending along a first direction, and a plurality of second electrodes that intersect with the plurality of first electrodes and intersect with each other. The plurality of first electrodes are in contact with the plurality of first electrodes. The plurality of second electrodes constitute a plurality of capacitors; the first electrode includes a conductive electrode of a transparent conductive material or a metal grid structure including a plurality of metal microwires; and the second electrode includes a conductive electrode of a transparent conductive material Or a metal grid structure composed of a plurality of metal microwires.

Compared with the conventional technology, in the touch screen of the present invention, the dielectric layer includes a slot, and the slot is located between the first portion of the peripheral wiring and the indicating portion. The dielectric constant of the dielectric is smaller than the dielectric constant of the dielectric layer, so that the parasitic capacitance at the overlapping position of the peripheral traces and the indicator portion is smaller, which can improve the yield of the touch screen with the larger parasitic capacitance. And touch performance.

10‧‧‧ touch screen

11‧‧‧ Cover

12‧‧‧Decorative layer

13‧‧‧ dielectric layer

14‧‧‧Sensor structure

15, 25, 35, 45, 55, 65‧‧‧

111‧‧‧touch area

112‧‧‧Border area

121‧‧‧Instruction

122‧‧‧ shelter

131‧‧‧Slotted

151, 251, 351, 451, 551, 651‧‧‧ Part I

140, 240, 340, 440, 540, 640‧‧‧ substrate

141, 241, 341, 441, 541, 641‧‧‧ first electrode

143, 243, 543, 643‧‧‧ Insulation

142, 242, 342, 442, 542, 642‧‧‧Second electrode

X‧‧‧ first direction

Y‧‧‧ second direction

241a, 441a‧‧‧First electrode section

241b, 441b‧‧‧First connecting section

242a, 424a‧‧‧Second electrode section

242b, 442b‧‧‧Second connection section

343a, 443a‧‧‧ Insulation Department

FIG. 1 is a schematic plan view of a touch screen according to a first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of the touch screen shown in FIG. 1.

FIG. 3 is a schematic cross-sectional view of the touch screen shown in FIG. 1.

FIG. 4 is a schematic diagram of a planar structure of a sensor structure and a peripheral wiring of the touch screen shown in FIG. 1.

FIG. 5 is a schematic diagram of a sensor structure and a peripheral wiring structure of a touch screen according to a second embodiment of the present invention.

FIG. 6 shows a sensor structure of a touch screen and peripheral wirings according to a third embodiment of the present invention. Schematic.

FIG. 7 is a schematic diagram of a sensor structure and a peripheral wiring structure of a touch screen according to a fourth embodiment of the present invention.

FIG. 8 is a schematic structural diagram of a sensor structure and a peripheral wiring of a touch screen according to a fifth embodiment of the present invention.

FIG. 9 is a schematic diagram of a sensor structure and a peripheral wiring structure of a touch screen according to a sixth embodiment of the present invention.

Please refer to FIG. 1, FIG. 2, and FIG. 3. FIG. 1 is a schematic plan view of the touch screen 10 according to the first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view taken along line II-II of FIG. -III schematic cross-section. The touch screen 10 includes a cover plate 11, a decoration layer 12, a dielectric layer 13, a sensor structure 14, and a peripheral wiring 15.

The cover plate 11 includes a touch area 111 and a frame area 112. The cover plate 11 may be a transparent cover plate, and its material may include one of glass, sapphire, transparent resin, and transparent ceramic, but is not limited to the above materials. It can be understood that the cover plate 11 may have a rounded chamfer around the periphery, and the cover plate 11 may be a 2.5D or 3D cover plate with an edge on the arc.

The decoration layer 12 is disposed on the inner surface of the frame region 112 of the cover plate 11 and is used to shield the peripheral lines 15 and the like of the touch screen 10. In this embodiment, the decoration layer 12 is further formed with a predetermined Text or pattern. Specifically, the decoration layer 12 further includes an instruction portion 121 and a shielding portion 122. The instruction portion 121 has the predetermined text or pattern, and the predetermined text or pattern may be a specific pattern, a specific text or a combination of letters, Such as trademark text or patterns, a special logo of a brand (such as Logo shown in Figure 1) and so on. The shielding portion 122 is located around the indicating portion 121. It can be understood that the color and material of the shielding portion 122 and the indication portion 121 are different. Specifically, the shielding portion 122 and the indication portion 121 may be ink materials with different colors (for example, the shielding portion 122 includes black Ink material, the indication portion 121 includes other colored ink materials), so that the indication portion 121 may have the predetermined text or pattern. The insulation resistance of the material of the indication portion 121 may be less than 10 ¹² ohms.

The dielectric layer 13 is located on a side of the decorative layer 12 away from the cover plate 11 and an inner surface of the touch area 111 of the cover plate 11. Specifically, the material of the dielectric layer 13 may be an optical adhesive (OCA) for bonding the peripheral wiring 15 and the sensor structure 14 to the decoration layer 12 away from the cover plate 11- And the inner surface of the touch area 111.

Further, the dielectric layer 13 includes a slot 131, and the slot 131 is provided corresponding to the indicating portion 121. The dielectric constant of the medium in the slot 131 is smaller than the dielectric constant of the dielectric layer 13. Specifically, the dielectric constant of the medium in the slot 131 is less than two. In this embodiment, the medium in the slot 131 is a gas, such as air. However, it can be understood that, in a modified embodiment, the slot 131 may be filled with other insulating materials with a smaller dielectric constant, such as resin. Materials, etc. Further, the edge of the dielectric layer 13 and the edge of the indicating portion 121 have a predetermined interval, and the width of the predetermined interval may be greater than 0.15 millimeters (mm).

The sensor structure 14 is disposed corresponding to the touch area 111 and is located on a side of the dielectric layer 13 away from the cover plate 11, wherein the dielectric layer 13 can adhere the sensor structure 14 to The inner surface of the touch area 111 of the cover plate 11, so that the dielectric layer 13 is sandwiched between the cover plate 11 and the sensor structure 14. It can be understood that the sensor structure 14 is used to detect a position of a touch action applied to the touch area 111. It can be understood that the sensor structure 14 may be a capacitive touch sensor structure, which detects a capacitance change caused by a touch action applied to the touch area 111 to detect a change applied to the touch The position of the touch operation in the region 111.

The peripheral wiring 15 corresponds to the frame region 112 and is located on a side of the dielectric layer 13 away from the decoration layer 12. The peripheral wiring 15 is also electrically connected to the sensor structure 14 for The touch driving and detecting circuit (not shown) is electrically connected through a flexible circuit board (not shown) to transmit the driving signals of the touch and detecting driving circuit to the sensor structure 14 and the The sensing signal generated by the sensor structure 14 is transmitted to the touch driving and detecting circuit, and the touch driving and detecting circuit judges the touch applied to the touch area 111 according to the driving signal and the sensing signal. Control the position of the action. It can be understood that the number of the peripheral traces 15 is plural, and the sensor structure 14 may include a plurality of electrodes, and each electrode is connected to a corresponding peripheral trace 15. The material of the peripheral wiring 15 may include metal, such as opaque metal: silver, aluminum, and the like.

Further, the peripheral wiring 15 includes a first portion 151. When viewed in a direction perpendicular to the touch screen 10, the first portion 151 of the peripheral wiring 15 overlaps the indicating portion 121, and the slot 131 is located at Between the first portion 151 of the peripheral wiring 15 and the indicating portion 121. The planar shape of the slot 131 may be a rectangle, but is not limited to a rectangle, and may also be a circle, an ellipse, a polygon, or other shapes suitable for the contour of the indicating portion 121.

Please refer to FIG. 4, which is a schematic plan view of the sensor structure 14 and the peripheral wiring 15 of the touch screen 10 shown in FIG. 1. The sensor structure 14 is a two-layer conductive layer structure, which includes a substrate 140, a plurality of first electrodes 141, an insulating layer 143, and a plurality of second electrodes 142. The plurality of first electrodes 141 extend along a first direction X, and the plurality of second electrodes 142 extend along a second direction Y. The first direction X may be perpendicular to the second direction Y. In this embodiment, the first electrode 141 and the second electrode 142 are both straight.

The first electrode 141 and the second electrode 142 are located in different layers, the insulating layer 143 is sandwiched between the first electrode 141 and the second electrode 142, and the plurality of first electrodes 141 and The plurality of second electrodes 142 intersect with each other to form a plurality of capacitors. It can be understood that the sensor structure 14 detects the touch signal applied to the touch area 111 by the plurality of capacitors to cause an electrical signal change to detect the touch applied to the touch area 111. Control the position of the action. Said The first electrode 141 may be formed of a transparent conductive material (such as indium tin oxide, ITO), and the second electrode 142 may also be formed of the same transparent conductive material as the first electrode. The material of the insulating layer 143 may be a transparent insulating material.

Each first electrode 141 is connected to a corresponding peripheral trace 15, and each second electrode 142 is also connected to a corresponding peripheral trace 15. The plurality of peripheral wirings 15 include a first portion 151 corresponding to the indicating portion 121. When viewed from a plane (that is, when viewed from the direction perpendicular to the touch screen 10), the first portion 151 is separated from the dielectric layer 13. The grooves 131 overlap.

Compared with the conventional technology, in the touch screen 10 of the present invention, the dielectric layer 13 includes a slot 131, and the slot 131 is located between the first portion 151 of the peripheral wiring 15 and the indicating portion 121. The dielectric constant of the medium in the slot 131 is smaller than the dielectric constant of the dielectric layer 13, so that the parasitic capacitance of the overlapping position of the peripheral trace 15 and the indicator 121 is small, such as a user's finger The parasitic capacitance formed with the peripheral traces is small, which can improve the large parasitic capacitance, which adversely affects the yield and touch performance of the touch screen.

Please refer to FIG. 5, which is a schematic structural diagram of a sensor structure and a peripheral wiring of a touch screen according to a second embodiment of the present invention. The structure of the touch screen of the second embodiment is basically the same as that of the touch screen of the first embodiment, that is, the above description of the touch screen of the first embodiment can basically be applied to the touch screen of the first embodiment. The main difference between the touch screens of the second embodiment is that the structure of the sensor structure is different.

Specifically, in the second embodiment, the sensor structure includes a substrate 240, a plurality of first electrodes 241, an insulating layer 243, and a plurality of second electrodes 242. The plurality of first electrodes 241 extend along a first direction X, and the plurality of second electrodes 242 extend along a second direction Y. The first direction X may be perpendicular to the second direction Y. The first electrode 241 and the second electrode 242 are located in different layers, the insulation layer 243 is sandwiched between the first electrode 241 and the second electrode 242, and the plurality of first electrodes 241 and The plurality of second electrodes 242 are insulated and intersect to form a complex Several capacitors. It can be understood that the sensor structure detects the position of the touch action applied to the touch area by detecting a change in an electrical signal caused by the touch action applied to the touch area by the plurality of capacitors. The first electrode 241 may be formed of a transparent conductive material (such as indium tin oxide, ITO), and the second electrode 242 may also be formed of the same transparent conductive material as the first electrode. The insulating layer 243 may be a transparent insulating material.

Each first electrode 241 includes a plurality of first electrode portions 241a and a plurality of first connection portions 241b. The plurality of first electrode portions 241a are arranged along the first direction X, and two adjacent first electrode portions 241a They are connected by a corresponding first connection portion 241b. Each second electrode 242 includes a plurality of second electrode portions 242a and a plurality of second connecting portions 242b. The plurality of second electrode portions 242a are arranged along the second direction Y, and the two adjacent second electrode portions 242a The two are connected by a corresponding second connection portion 242b. The first connection portion 241b of the first electrode 241 overlaps the second electrode 242 and the second connection portion 242b. The first electrode portion 241a and the second electrode portion 242a are substantially rhombic, and the first connection portion is substantially straight.

Each first electrode 241 is connected to a corresponding one of the peripheral traces 25, and each second electrode 242 is also connected to a corresponding one of the peripheral traces 25. The plurality of peripheral traces 25 includes a first portion 251 corresponding to the indicating portion. When viewed from a plane (that is, viewed from a direction perpendicular to the touch screen), the first portion 251 overlaps with the slot of the dielectric layer.

Please refer to FIG. 6. FIG. 6 is a schematic diagram of a sensor structure and a peripheral wiring structure of a touch screen according to a third embodiment of the present invention. The structure of the touch screen of the third embodiment is basically the same as that of the touch screen of the first embodiment, that is, the above description of the touch screen of the first embodiment can basically be applied to the touch screen of the first embodiment. The main difference between the touch screen of the third embodiment is that the structure of the sensor structure is different.

In the third embodiment, the sensor has a single-layer conductive layer structure. Specifically, the sensor structure includes a plurality of first electrodes 341, a plurality of insulating portions 343a, and a plurality of second Electrode 342. The plurality of first electrodes 341 extend along a first direction X, and the plurality of second electrodes 342 extend along a second direction Y. The first direction X may be perpendicular to the second direction Y. In this embodiment, the first electrode 341 and the second electrode 342 are both straight. Most of the first electrode 341 and the second electrode 342 are located on the same layer, such as both on the substrate 340. Each insulating portion 343a is located at the intersection of a corresponding first electrode 341 and a second electrode 342 to insulate the first electrode 341 from the second electrode 342. It can be understood that a portion of the second electrode 342 on the insulating portion 343a is located on a different layer from the first electrode 341. The material of the insulating portion 343a is a transparent insulating material.

The sensor structure detects a change in an electric signal caused by a touch action applied to the touch area by the plurality of capacitors to detect a position of the touch action applied to the touch area. The first electrode 341 may be formed of a transparent conductive material (such as indium tin oxide, ITO), and the second electrode 342 may also be formed of the same transparent conductive material as the first electrode. However, it can be understood that in one embodiment, the second electrode 342 may be mostly the same material as the first electrode 341, but a portion located on the insulation portion 343a may be a metal material.

Each first electrode 341 is connected to a corresponding peripheral trace 35, and each second electrode 342 is also connected to a corresponding peripheral trace 35. The plurality of peripheral traces 35 includes a first portion 351 corresponding to the indicating portion. When viewed from a plane (that is, when viewed from a direction perpendicular to the touch screen), the first portion 351 overlaps the slot of the dielectric layer.

Please refer to FIG. 7. FIG. 7 is a schematic diagram of a sensor structure and a peripheral wiring structure of a touch screen according to a fourth embodiment of the present invention. The structure of the touch screen of the fourth embodiment is basically the same as that of the touch screen of the first embodiment, that is, the above description of the touch screen of the first embodiment can basically be applied to the touch screen of the first embodiment. The main difference between the touch screens of the fourth embodiment is that the structure of the sensor structure is different.

Specifically, in the fourth embodiment, the sensor structure includes a plurality of first electrodes 441, a plurality of insulating portions 443a, and a plurality of second electrodes 442. The plurality of first electrodes 441 extend along a first direction X, and the plurality of second electrodes 442 extend along a second direction Y. The first direction X may be perpendicular to the second direction Y. Each first electrode 441 includes a plurality of first electrode portions 441a and a plurality of first connecting portions 441b. The plurality of first electrode portions 441a are arranged along the first direction X, and two adjacent first electrode portions 441a They are connected by a corresponding first connection portion 441b. Each second electrode 442 includes a plurality of second electrode portions 442a and a plurality of second connecting portions 442b. The plurality of second electrode portions 442a are arranged along the second direction Y, and the two adjacent second electrode portions 442a The two are connected by a corresponding second connection portion 442b. Each insulating portion 443a is located at the intersection of a first connection portion 441b of a corresponding first electrode 441 and a second connection portion 442b of a second electrode 442, so as to connect the first electrode 441 and the second electrode 442. insulation. The material of the insulating portion 443a is a transparent insulating material. The first electrode portion 441a and the second electrode portion 442a may be substantially diamond-shaped, and the first connection portion may be substantially straight.

The plurality of first electrodes 441 intersect with the plurality of second electrodes 442 to form a plurality of capacitors. It can be understood that the sensor structure detects the position of the touch action applied to the touch area by detecting a change in an electrical signal caused by the touch action applied to the touch area by the plurality of capacitors. The first electrode 441 may be formed of a transparent conductive material (such as indium tin oxide, ITO), and the second electrode 442 may also be formed of the same transparent conductive material as the first electrode 441, but it is understood that in an implementation In an embodiment, the second electrode portion 442a of the second electrode 442 is the same as the first electrode 441, but the second connection portion 442b located on the insulating portion 443a may be a metal material.

Each first electrode 441 is connected to a corresponding peripheral trace 45, and each second electrode 442 is also connected to a corresponding peripheral trace 45. And the plurality of peripheral wirings 45 include the first A portion 451 is viewed from a plane (that is, viewed in a direction perpendicular to the touch screen), and the first portion 451 overlaps with the slot of the dielectric layer.

FIG. 8 is a schematic diagram of a sensor structure and a peripheral wiring structure of a touch screen according to a fifth embodiment of the present invention. The structure of the touch screen of the fifth embodiment is basically the same as that of the touch screen of the first embodiment, that is, the above description of the touch screen of the first embodiment can basically be applied to the touch screen of the first embodiment. The main difference between the touch screens of the fifth embodiment is that the electrode materials of the sensor structure are different.

In the fifth embodiment, the sensor structure is also a two-layer conductive layer structure, which includes a substrate 540, a plurality of first electrodes 541, an insulating layer 543, and a plurality of second electrodes 542. The plurality of first electrodes 541 extend along a first direction X, and the plurality of second electrodes 542 extend along a second direction Y. The first direction X may be perpendicular to the second direction Y. The first electrode 541 and the second electrode 542 are located in different layers, the insulation layer 543 is sandwiched between the first electrode 541 and the second electrode 542, and the plurality of first electrodes 541 and The plurality of second electrodes 542 intersect with each other to form a plurality of capacitors. In this embodiment, the first electrode 541 and the second electrode 542 are both straight.

It can be understood that the sensor structure detects the position of the touch action applied to the touch area by detecting a change in an electrical signal caused by the touch action applied to the touch area by the plurality of capacitors. The first electrode 541 may include a metal mesh structure made of metal microwires, and the material may be metal, such as nano-silver, copper, and the like. The second electrode 542 may also be the same as the first electrode. Metal grid structure.

Each first electrode 541 is connected to a corresponding peripheral trace 55, and each second electrode 542 is also connected to a corresponding peripheral trace 55. The plurality of peripheral traces 55 include a first portion 551 corresponding to the indicating portion. When viewed from a plane (that is, viewed in a direction perpendicular to the touch screen), the first portion 551 overlaps with the slot of the dielectric layer.

FIG. 9 is a schematic diagram of a sensor structure and a peripheral wiring structure of a touch screen according to a sixth embodiment of the present invention. The structure of the touch screen of the sixth embodiment is basically the same as that of the touch screen of the second embodiment, that is, the above description of the touch screen of the second embodiment can basically be applied to the touch screen of the second embodiment. The main difference between the touch screen of the sixth embodiment is that the electrode materials of the sensor structure are different.

Specifically, in the sixth embodiment, the sensor structure is also a two-layer conductive layer structure, which includes a substrate 640, a plurality of first electrodes 641, an insulating layer 643, and a plurality of second electrodes 642. The plurality of first electrodes 641 extend along a first direction X, the plurality of second electrodes 642 extend along a second direction Y, and the first direction X may be perpendicular to the second direction Y. The first electrode 641 and the second electrode 642 are located in different layers, the insulating layer 643 is sandwiched between the first electrode 641 and the second electrode 642, and the plurality of first electrodes 641 and The plurality of second electrodes 642 intersect with each other to form a plurality of capacitors. It can be understood that the sensor structure detects the position of the touch action applied to the touch area by detecting a change in an electrical signal caused by the touch action applied to the touch area by the plurality of capacitors.

The first electrode 641 may include a metal mesh structure composed of metal microwires, and a material thereof may be a metal, such as nano-silver, copper, or the like. The second electrode 642 may also be composed of the first electrode 641. The same metal grid structure.

Each first electrode 641 includes a plurality of first electrode portions 641a and a plurality of first connection portions 641b. The plurality of first electrode portions 641a are arranged along the first direction X, and two adjacent first electrode portions 641a They are connected by a corresponding first connection portion 641b. Each second electrode 642 includes a plurality of second electrode portions 642a and a plurality of second connecting portions 642b. The plurality of second electrode portions 642a are arranged along the second direction Y, and two adjacent second electrode portions 642a The two are connected by a corresponding second connection portion 642b. The first connection portion 641b of the first electrode 641 and the second electrode 642 overlap the second connection portion 641a.

Each first electrode 641 is connected to a corresponding peripheral trace 65, and each second electrode 642 is also connected to a corresponding peripheral trace 65. The plurality of peripheral traces 65 include a first portion 651 corresponding to the indicating portion. Viewed from a plane (that is, viewed in a direction perpendicular to the touch screen), the first portion 651 overlaps with the slot of the dielectric layer.

Of course, the present invention is not limited to the above-disclosed embodiments, and the present invention may also be variously modified to the above-mentioned embodiments. Those skilled in the art can understand that, as long as it is within the scope of the essential spirit of the present invention, appropriate changes and modifications made to the above embodiments fall within the scope of protection of the present invention.

Claims (10)

A touch screen includes a cover plate including a touch area and a border area located around the touch area; a decoration layer disposed on an inner surface of the frame area of the cover plate; and a dielectric layer located far from the decoration layer. A side of the cover plate; a sensor structure corresponding to the touch area setting; and a peripheral wiring corresponding to the frame area and located on a side of the dielectric layer away from the decoration layer, the peripheral wiring It is also electrically connected to the sensor structure; its improvement is that the decorative layer includes a shielding portion and an instruction portion, the instruction portion forms a predetermined character or pattern, and the shielding portion is located around the instruction portion and is vertically arranged. Viewed from the direction of the touch screen, the first portion of the peripheral wiring overlaps the indicating portion, and the dielectric layer includes a slot, and the slot is located between the first portion of the peripheral routing and the indicating portion. Meanwhile, the dielectric constant of the medium in the slot is smaller than the dielectric constant of the dielectric layer. The touch screen according to claim 1, wherein the medium in the slot is air. The touch screen according to claim 1, wherein a dielectric constant of the medium in the slot is less than 2. The touch screen according to claim 1, wherein the edge of the indicating portion and the edge of the dielectric layer have a predetermined interval. The touch screen according to claim 4, wherein the predetermined interval is greater than 0.15 mm. The touch screen according to claim 1, wherein the insulation resistance of the material of the indication portion is less than 10 ¹² ohms. The touch screen according to claim 1, wherein the dielectric layer is an optical adhesive layer. The touch screen according to claim 1, wherein the dielectric layer is further located between the sensor structure and the cover plate. The touch screen according to claim 1, wherein the sensor structure includes a plurality of electrodes, and the number of the peripheral traces is plural, and each electrode is connected to a corresponding one of the peripheral traces. Viewed from the direction of the touch screen, the first portion of the plurality of peripheral traces overlaps the indication portion. The touch screen according to claim 1, wherein the plurality of electrodes include a plurality of first electrodes extending along a first direction, and a plurality of second electrodes that intersect with the plurality of first electrodes and intersect with each other. The plurality of first electrodes and the plurality of second electrodes constitute a plurality of capacitors; the first electrode includes a conductive electrode of a transparent conductive material or a metal grid structure including a plurality of metal microwires; the second electrode A conductive electrode including a transparent conductive material or a metal grid structure composed of a plurality of metal microwires.