TWI660296B - Touch apparatus - Google Patents

Abstract

A touch device includes a substrate, a plurality of sensing electrodes, a plurality of first leads, and a plurality of second leads. The substrate has a display area and a peripheral area, wherein the peripheral area surrounds the display area. The sensing electrode is located in the display area and includes a plurality of first sensing electrodes and a plurality of second sensing electrodes. The second sensing electrode is closer to the peripheral region than the first sensing electrode. The first wire is located in the peripheral area, and the first wire is connected to a part of the second sensing electrode, respectively. The first wire has a first portion closer to the second sensing electrode and a second portion connected to the first portion. The second wire is located in the peripheral area. The first part is not covered by the second wire, and the second part is covered by the second wire. The conductivity of the second wire is higher than that of the first wire.

Description

Touch device

This disclosure relates to the field of touch technology, and more particularly to a touch device.

Touch display technology can be applied to electronic screens, computers, mobile phones or various wearable technology devices. The touch panel has a visible area and a non-visible area. The non-visible area surrounds the periphery of the visible area. A transparent touch sensing array is provided in the visible area for the user to touch and operate. The touch panel's wiring is set in the non-visible area. Viewable area.

Because the design of wearable technology often aims at miniaturization, in the design of products, it is hoped that the frame can be as narrow as possible. However, the touch display device with a narrow frame is prone to exposed lines and affects the appearance of the product.

The embodiments of the present disclosure provide a touch panel, in which the wires in the peripheral area of the outer edge of the display area are changed to transparent wires, so that the design requirements for narrowing the frame and the appearance can be met at the same time.

In some embodiments, a touch device includes a substrate, a plurality of sensing electrodes, a plurality of first leads, and a plurality of second leads. The substrate has a display A display area and a surrounding area, wherein the surrounding area surrounds the display area. The sensing electrode is located in the display area and includes a plurality of first sensing electrodes and a plurality of second sensing electrodes. The second sensing electrode is closer to the peripheral region than the first sensing electrode. The first wire is located in the peripheral area, and the first wire is connected to a part of the second sensing electrode, respectively. The first wire has a first portion closer to the second sensing electrode and a second portion connected to the first portion. The second wire is located in the peripheral area. The first part is not covered by the second wire, and the second part is covered by the second wire. The conductivity of the second wire is higher than that of the first wire.

In some embodiments, the touch device further includes a plurality of third wires and a plurality of fourth wires. The third wires are located in the peripheral area and connected to the second sensing electrodes of the other parts. The plurality of fourth wires are located in the peripheral area and are connected to the first sensing electrode. The conductivity of the fourth wire is higher than that of the third wire. The third wire is located between the fourth wire and the second sensing electrode.

In some embodiments, the line width of the third conductive line is greater than the line width of the fourth conductive line.

In some embodiments, the materials of the first and third wires are the same, and the materials of the second and fourth wires are the same.

In some embodiments, the materials of the first lead and the third lead are the same as those of the first and second sensing electrodes.

In some embodiments, the materials of the first and third wires are transparent conductive materials, and the materials of the second and fourth wires are copper.

In some embodiments, a touch device includes a substrate, a processing wafer, a plurality of first sensing electrodes, a plurality of second sensing electrodes, a transparent circuit layer, a first metal circuit layer, and a second metal circuit layer. The substrate has a display area and a peripheral area, wherein the peripheral area surrounds the display area. Processing wafer is set on the substrate The side. The first sensing electrode is located in a display area of the substrate. The second sensing electrode is located in a display area of the substrate, wherein a distance between the first sensing electrode and the processing wafer is larger or smaller than a distance between the second sensing electrode and the processing wafer. The transparent circuit layer is located in a peripheral region of the substrate, wherein the transparent circuit layer is connected to the second sensing electrode. The first metal circuit layer is located in the peripheral area. The first metal circuit layer is connected to the first sensing electrode, and the transparent circuit layer is located between the second sensing electrode and the first metal circuit layer. The second metal circuit layer is connected to the processing wafer and partially covers the transparent circuit layer.

In some embodiments, the transparent circuit layer has a first portion closer to the second sensing electrode and a second portion connected to the first portion, and the first portion of the transparent circuit layer is not located below the second metal circuit layer. And the second part of the transparent circuit layer is located below the second metal circuit layer.

In some embodiments, the second metal circuit layer does not directly contact the second sensing electrode.

In some embodiments, the transparent circuit layer has a plurality of transparent wires, and the line width of the transparent wires ranges from about 0.1 mm to about 0.2 mm.

In the above embodiments, the touch device has a transparent wire in addition to a metal wire. For example, since the transparent wire is transparent, the problem of being seen by the user can be avoided. In this way, the transparent wire can be set about 0.015 mm away from the display area. At the same time, since the number of wires in the peripheral area is fixed, by providing transparent wires within about 0.4 mm away from the display area, it is possible to reduce the wires outside the display area by about 0.4 mm, so that the above embodiment can achieve a narrow Design requirements of the border.

The above is only used to explain the problem to be solved by the present invention, the technical means for solving the problem, and the effects produced by it, etc. The specific details of the present invention It will be described in detail in the following embodiments and related drawings.

10‧‧‧ touch device

100‧‧‧ substrate

102‧‧‧display area

104‧‧‧Peripheral area

106‧‧‧ Handling Wafers

110‧‧‧first sensing electrode

112‧‧‧Second sensing electrode

113A‧‧‧Central route area

113B‧‧‧ Peripheral circuit area

114‧‧‧first lead

115‧‧‧Second Lead

116‧‧‧Third Lead

118‧‧‧ fifth lead

120‧‧‧ Fourth wire

122‧‧‧ ground wire

1141‧‧‧Part I

1143‧‧‧Part II

1161‧‧‧Part 1

1163‧‧‧Part II

S‧‧‧line spacing

W‧‧‧line width

Read the following detailed description and the corresponding drawings to understand the multiple aspects of this disclosure. It should be noted that many features in the drawings are not drawn according to the standard practice in the industry. In fact, the dimensions of the features can be arbitrarily increased or decreased to facilitate the clarity of the discussion.

FIG. 1 is a top view of a touch device according to some embodiments of the present disclosure; FIG. 2 is an enlarged schematic view of a region V1 shown in FIG. 1; and FIG. 3 is an enlarged view of an area V2 shown in FIG. 1. 4 is a schematic cross-sectional view taken along line II of FIG. 2; and FIG. 5 is a schematic cross-sectional view taken along line II-II of FIG. 2.

The following will clearly illustrate the spirit of this disclosure with drawings and detailed descriptions. Any person with ordinary knowledge in the technical field who understands the embodiments of this disclosure can be changed and modified by the techniques taught in this disclosure. Depart from the spirit and scope of this disclosure. For example, describing "the first feature is formed on or above the second feature", in the embodiment will include the first feature and the second feature having direct contact; and will also include the first feature and the second feature as indirect The contact has additional features formed between the first feature and the second feature. In addition, the disclosure will reuse component numbers and / or text in multiple examples. The purpose of repetition is to simplify and clarify, and does not itself determine multiple embodiments and / Or the relationship between the configurations in question.

In addition, relative vocabulary such as "below", "below", "below", "above" or "up" or similar words are used in this article to facilitate the description of an element shown in the drawings Or relationship to another element or feature. In addition to describing the orientation of the device in the drawings, the term relative orientation includes different orientations of the device under use or operation. When the device is additionally set (rotated 90 degrees or other facing orientation), the relative vocabulary of orientation used in this article can also be interpreted accordingly.

FIG. 1 is a top view of a touch device 10 according to some embodiments of the present disclosure, FIG. 2 is an enlarged schematic view of a region V1 shown in FIG. 1, and FIG. 3 is an enlarged view of an area V2 shown in FIG. 1. schematic diagram. Referring to FIG. 1, the touch device 10 includes a substrate 100 and a processing wafer 106 disposed on the substrate 100 side. In some embodiments, the material of the substrate 100 may be glass, polymethylmethacrylate (PMMA), polycarbonate (PC), polyimide (PI), or sapphire. , Silicon or other suitable transparent materials. The substrate 100 has a display area 102 and a peripheral area 104 surrounding the display area 102. The display area 102 is a light-transmitting area for displaying an image. The peripheral area 104 is a non-light-transmitting area. A light-shielding layer (not shown) is disposed in the peripheral area. 104, for shielding the wires to prevent the wires from affecting the visual effect of the touch device 10. In some embodiments, the processing chip 106 is an integrated circuit (IC).

Referring to FIG. 2 and FIG. 3, the substrate 100 includes a plurality of first sensing electrodes 110 and a plurality of second sensing electrodes 112 formed on the substrate 100, a central wiring area 113A, and peripheries opposite to the central wiring area 113A. Circuit area 113B. In some embodiments, the ground line 122 is disposed in the peripheral circuit area 113B and is connected to an external ground line (such as the ground line of the processing chip 106) to achieve the effect of electrostatic protection. The material of the ground line 122 is metal. The first and second sensing electrodes 110 and 112 are located in the display area 102, and the peripheral circuit area 113B is located in the peripheral area 104. The second sensing electrode 112 is closer to the peripheral region 104 than the first sensing electrode 110, and the first sensing electrode 110 and the second sensing electrode 112 are electrically connected to the processing chip 106 through the central and peripheral wiring regions 113A and 113B. In some embodiments, the material of the first and second sensing electrodes 110 and 112 may be Indium Tin Oxide (ITO) or other transparent conductive materials.

The central circuit region 113A has a first conductive line 114 and a second conductive line 115 adjacent to the first conductive line 114. One end of the first conductive line 114 is connected to the second conductive line 115, and the other end (not shown) is connected to the second sensing electrode 112. The second conductive line 115 does not directly contact the second sensing electrode 112. In some embodiments, the distance between the first sensing electrode 110 and the processing wafer 106 is smaller than the distance between the second sensing electrode 112 and the processing wafer 106. In other embodiments, the distance between the first sensing electrode 110 and the processing wafer 106 is greater than the distance between the second sensing electrode 112 and the processing wafer 106.

Referring to FIG. 4, which is a schematic cross-sectional view taken along line II of FIG. 2, the first lead wires 114 are respectively connected to the second sensing electrodes 112, and the first lead wires 114 are respectively closer to the second sensing electrodes. The first part 1141 of 112 and the second part 1143 connected to the first part 1141, that is, the first part 1141 of the first wire 114 is closer to the display area 102 than the second part 1143, and the first part of the first wire 114 The portion 1141 is not located below the second conductive line 115, and the second portion 1143 of the first conductive line 114 is located below the second conductive line 115, that is, the The first portion 1141 is not covered by the second lead 115, and the second portion 1143 is covered by the second lead 115. In other words, the second lead 115 partially covers the first lead 114, and one end of the second lead 115 is connected to the processing chip 106 . In some embodiments, the material of the first wire 114 is different from the material of the second wire 115. In some embodiments, the conductivity of the second conductive line 115 is higher than the conductivity of the first conductive line 114.

The third conductive line 116 and the fifth conductive line 118 adjacent to the third conductive line 116 are located in the peripheral circuit area 113B of the peripheral area 104. One end of the third conductive line 116 is connected to the fifth conductive line 118, and the other end is connected to the second sensing electrode of the other part. 112 (see Figure 3). The fifth lead 118 does not directly contact the second sensing electrode 112.

The third wire 116 has a first portion 1161 and a second portion 1163. Referring to FIG. 5, FIG. 5 is a schematic cross-sectional view taken along the line II-II in FIG. 2. The first portion 1161 of the third wire 116 is not located in the first portion. Below the fifth wire 118, and the second portion 1163 of the third wire 116 is located below the fifth wire 118, that is, the first portion 1161 of the third wire 116 is not covered by the fifth wire 118, and the second portion 1163 is covered by the fifth The conductive line 118 covers, in other words, the fifth conductive line 118 partially covers the second conductive line 116, and the first portion 1161 of the third conductive line 116 is closer to the display area 102 than the second portion 1163. In some embodiments, the material of the third wire 116 is different from the material of the fifth wire 118. In some embodiments, the conductivity of the fifth conductive line 118 is higher than the conductivity of the third conductive line 116.

In the conventional technology, based on tolerance considerations, in order to prevent users from seeing the metal wires and to meet the requirements of the overlap width of the metal wires and the sensing electrodes, the metal wires must be set from about 0.4 mm away from the display area 102, but in this disclosure In addition to providing metal wires, transparent wires are also used. For example, by Since the third wire 116 is transparent, the problem of being seen by the user can be avoided. In this way, the third wire 116 can be set about 0.015 mm away from the display area 102. At the same time, since the number of wires on the peripheral area 104 is fixed, by setting a third wire 116 on the peripheral area 104 within 0.4 mm from the display area 102, the wires from the area outside the display area 102 by about 0.4 mm can be reduced. Can meet the design requirements of narrow borders.

The fourth conductive line 120 is located in the peripheral circuit area 113B of the peripheral area 104. One end (not shown) of the fourth conductive line 120 is connected to the first sensing electrode 110, and the other end is connected to the processing chip 106. In some embodiments, the fourth conductive line 120 is farther from the display area 102 than the third conductive line 116 and the fifth conductive line 118. That is, the third conductive line 116 is located between the second sensing electrode 112 and the fourth conductive line 120. The five wires 118 are also located between the second sensing electrode 112 and the fourth wire 120. In some embodiments, the length of the fourth conductive line 120 is greater than the sum of the length of the third conductive line 116 and the length of the fifth conductive line 118. The material of the fourth wire 120 is different from that of the first and third wires 114 and 116. In some embodiments, the electrical conductivity of the fourth conductive line 120 is higher than the electrical conductivity of the third conductive line 116.

In some embodiments, the materials of the first and third wires 114 and 116 are the same, such as indium tin oxide or other transparent conductive materials. In some embodiments, the materials of the first and third wires 114 and 116 are the same as those of the first and second sensing electrodes 110 and 112. When the materials of the first and second sensing electrodes 110 and 112 are indium oxide In the case of tin, the material of the first and third wires 114 and 116 is also indium tin oxide.

In some embodiments, the materials of the second, fourth, and fifth wires 115, 120, and 118 may be silver, copper, aluminum, gold, nickel, or titanium, but this disclosure does not This is the limit. In some embodiments, the second, fourth, and fifth wires 115, 120, and 118 include the same material. The second, fourth, and fifth wires 115, 120, and 118 may be formed by screen printing or coating, but the disclosure is not limited thereto.

Referring to FIG. 3, the third wires 116 each have a line width W, and the size of the line width W can satisfy a low channel impedance. In some embodiments, the line width W ranges from about 0.1 mm to about 0.2 mm. The distance between two adjacent third wires 116 is the line distance S. In actual use, the line distance S can be adjusted according to the process capability of the device. In this embodiment, the line distance S is about 0.015 mm. The number of the third wires 116 depends on the line width W and the line spacing S. The number of the third wires 116 is equal to 0.4 / (line width W (mm) + 0.015). If there is a decimal point in the calculation result, the unconditional rounding method is used. And the line width W is an integer. In this embodiment, the third conductive line 116 and the fifth conductive line 118 connected to the third conductive line 116 are disposed on the peripheral area 104 located within about 0.4 millimeters away from the display area 102, and the fourth conductive line 120 is located about 0.4 away from the display area 102. On the peripheral area 104 other than millimeters, since the number of wires on the peripheral area 104 is fixed, by arranging the third wire 116 on the peripheral area 104 within 0.4 mm away from the display area 102, it is possible to reduce The number of the fourth wires 120 in the peripheral area 104 beyond 0.4 mm can meet the design requirements of the narrow frame. In some embodiments, when the line width W is equal to 0.185 mm, the number of the third conductive lines 116 is two, that is, the number of the third conductive lines 116 far from the peripheral area 104 about 0.4 mm away from the display area 102 can be reduced by 2 Strips while narrowing the border. In some embodiments, the line width of the third conductive line 116 is greater than the line width of the fourth conductive line 120.

The touch device 10 has transparent wires in addition to metal wires. For example, in some embodiments, when the third wire of the touch device 10 is The material of 116 is a transparent conductive material, which can avoid the problem of being seen by the user. In this way, the third wire 116 can be set at a distance of about 0.015 mm away from the display area 102. At the same time, since the number of wires on the peripheral area 104 is fixed, by disposing the third wire 116 within 0.4 mm away from the display area 102, the number of fourth wires 120 away from the display area by about 0.4 mm can be reduced. Then, the foregoing implementation manner can meet the design requirement of narrowing the frame.

The features of several implementations or examples are summarized above, so that those with ordinary knowledge in the art can better understand this disclosure from various aspects. Those with ordinary knowledge in the technical field should understand and can easily design or modify other processes and structures based on this disclosure, and thereby achieve the same purpose and / or achieve the implementation methods or embodiments described herein. The same advantages. Those of ordinary skill in the art should also understand that these equivalent structures do not depart from the spirit and scope of the disclosure. Without departing from the spirit and scope of this disclosure, various changes, substitutions or modifications can be made to this disclosure.

Claims (9)

A touch device includes: a substrate having a display area and a peripheral area, wherein the peripheral area surrounds the display area; a plurality of sensing electrodes located in the display area and including a plurality of first sensing electrodes and a plurality of second sensing areas Electrodes, the second sensing electrodes are closer to the peripheral region than the first sensing electrodes; a plurality of first wires are located in the peripheral region, and the first wires are respectively connected to the second sensing electrodes Each of the first wires has a first portion relatively close to the second sensing electrodes and a second portion connected to the first portion; a plurality of second wires are located in the peripheral area, and the first portions Not covered by the second wires, the second portions are covered by the second wires, and the conductivity of the second wires is higher than the conductivity of the first wires; the plurality of third wires are located in the peripheral area And are respectively connected to the second sensing electrodes of another part; and a plurality of fourth wires are located in the peripheral area and connected to the first sensing electrodes, and the conductivity of the fourth wires is higher than that of the third wires Conductivity, the third wire positions The plurality of wires and the fourth second sensing electrode. The touch device according to claim 1, wherein a line width of the third conductive lines is greater than a line width of the fourth conductive lines. The touch device according to claim 1, wherein the materials of the first wires and the third wires are the same, and the materials of the second wires and the fourth wires are the same. The touch device according to claim 1, wherein the materials of the first wires and the third wires are the same as the materials of the first and the second sensing electrodes. The touch device according to claim 1, wherein the materials of the first wires and the third wires are transparent conductive materials, and the materials of the second wires and the fourth wires are copper. A touch device includes: a substrate having a display area and a peripheral area, wherein the peripheral area surrounds the display area; a processing wafer is disposed on one side of the substrate; and a plurality of first sensing electrodes are disposed on the substrate. The display area; a plurality of second sensing electrodes located in the display area of the substrate, wherein a distance between the first sensing electrodes and the processing wafer is larger or smaller than a distance between the second sensing electrodes and the processing wafer Distance; a transparent circuit layer located in the peripheral region of the substrate, wherein the transparent circuit layer is connected to the second sensing electrodes; a first metal circuit layer located in the peripheral region, wherein the first metal circuit layer The first sensing electrodes are connected, wherein the transparent circuit layer is located between the second sensing electrodes and the first metal circuit layer; and a second metal circuit layer is connected to the processing chip and partially covers the transparent layer. Line layer. The touch device according to claim 6, wherein the transparent circuit layer has a first portion relatively close to the second sensing electrodes and a second portion connected to the first portion, and wherein the transparent circuit The first portion of the layer is not located below the second metal circuit layer, and wherein the second portion of the transparent circuit layer is located below the second metal circuit layer. The touch device according to claim 6, wherein the second metal circuit layer does not directly contact the second sensing electrodes. The touch device according to claim 6, wherein the transparent circuit layer has a plurality of transparent wires, and a line width of each of the transparent wires ranges from about 0.1 mm to about 0.2 mm.