CN202956748U - Co-connected capacitive touch panel - Google Patents

Abstract

The utility model relates to a connect formula altogether and walk capacitanc touch panel of line, capacitanc touch panel includes: an insulating substrate, which comprises a sensing area and at least one routing area; a plurality of touch electrodes disposed in the sensing region of the insulating substrate; the plurality of transparent wires are respectively and electrically connected with the plurality of touch electrodes and extend to the at least one routing area; a plurality of insulating pads formed in the at least one routing area of the insulating substrate and partially covering the plurality of transparent conductive lines; and a plurality of common connecting wires arranged in the at least one wiring area of the insulating substrate, wherein the plurality of common connecting wires are formed and cross over the plurality of insulating pads, and each common connecting wire is electrically connected with at least 2 transparent wires in the plurality of transparent wires. The utility model can be completed only by adopting general insulation printing and silver paste printing manufacturing processes without the need of the known expensive metal coating manufacturing process or the jumper bridging of the flexible printed circuit board.

Description

Co-connected capacitive touch panel

technical field

The utility model relates to a capacitive touch panel with common wiring, in particular to a touch panel suitable for mutual sensing.

Background technique

In general capacitive touch panels, X-axis sensing electrodes and Y-axis sensing electrodes are respectively arranged on two separate layers of electrodes. When the surface of the touch panel is touched or approached by an object (such as a finger), the capacitance value between the sensing electrodes will change correspondingly, and thus the position of the touch point can be measured by measuring the change of the capacitance value. However, the generally known two-layer sensing electrode requires two etching processes and complex lamination technology, and its fabrication process is complicated and expensive.

Please refer to FIG. 1 . FIG. 1 is a schematic diagram of a known single-layer capacitive touch panel. As shown in FIG. 1 , it discloses a touch sensing element made of a single-layer conductor, which includes a plurality of driving electrodes 91 , a plurality of sensing electrodes 92 , and a plurality of wires 93 . Each electrode is connected to the edge of the sensing element by an independent wire 93, and then connected to the driving element by a flexible printed circuit board.

Although the known single-layer capacitive touch panel shown in FIG. 1 can simultaneously manufacture the driving electrodes 91 and the sensing electrodes 92 on the same layer of conductors, but also because the single-layer conductors cannot alternately connect each electrode, so that the connection of each electrode The number of wires 93 and the number of connection terminals are greatly increased.

For example, taking a 7-inch touch panel as an example, the number of connecting terminals and wires 93 will reach 700-800 (bars); and taking a 13.3-inch touch panel as an example, the number of connecting terminals and wires 93 The quantity of 93 more reaches about 1800 (articles). Therefore, the large number of wires and the number of connection terminals not only increase the required area of the flexible printed circuit board, but also increase the difficulty of the flexible printed circuit board and the sensing element.

Utility model content

The main purpose of the present invention is to provide a capacitive touch panel with common wiring, which can greatly reduce the number of wiring and the number of connecting terminals. In addition, the utility model can be completed only by using common insulating printing and silver paste printing manufacturing processes, and does not need known expensive metal coating manufacturing processes or flexible printed circuit boards to implement jumpers.

In order to achieve the above purpose, the utility model provides a capacitive touch panel with common connection wiring, which mainly includes an insulating substrate, a plurality of touch electrodes, a plurality of transparent wires, a plurality of insulating pads and a plurality of common connection wire. Wherein, the insulating substrate includes a sensing area and at least one routing area; a plurality of touch electrodes are arranged in the sensing area of the insulating substrate; a plurality of transparent wires are respectively electrically connected to the plurality of touch electrodes and extend to at least one routing area; A plurality of insulating pads are formed in at least one routing area of the insulating substrate, and partially cover the plurality of transparent wires; and a plurality of common connecting wires are arranged in at least one routing area of the insulating substrate, and the plurality of common connecting wires Formed and straddled on a plurality of insulating pads, each common connection wire is electrically connected to at least two of the plurality of transparent wires.

In order to achieve the above-mentioned purpose, another capacitive touch panel of the utility model also includes an insulating substrate, a plurality of touch electrodes, a plurality of transparent wires, a plurality of insulating pads and a plurality of common connection wire. Wherein, the insulating substrate includes a sensing region and a routing region; a plurality of common wires are located on at least one routing region of the insulating substrate; a plurality of insulating pads are formed in at least one routing region of the insulating substrate, and partially cover On the plurality of common wires; the plurality of touch electrodes are arranged in the sensing area of the insulating substrate; and the plurality of transparent wires are respectively electrically connected to the plurality of touch electrodes and extend to the plurality of insulating pads in at least one wiring area; and , each common wire is electrically connected to at least two of the plurality of transparent wires.

Therefore, the utility model utilizes insulating pads to isolate common-connected wires and transparent wires, and implements three-dimensional stacking on local insulating substrates to form a multi-layer circuit structure. In addition to effectively forming insulation and avoiding circuit short circuits In addition, each common wire is electrically connected to a plurality of transparent wires, which is used to improve the large number of wires and connection terminals caused by the known single touch electrode having to have independent wires, and can effectively reduce the number of wires due to the huge number. The volume occupied by wires and connecting terminals.

Preferably, the insulating substrate of the capacitive touch panel with common wiring of the present invention can include two wiring areas, which can be respectively located on two corresponding sides of the sensing area, such as the upper and lower sides, or the left and right sides. side. Therefore, the areas occupied by the transparent wires and the common wires can be evenly distributed, and the wiring space between the rows and columns of the touch electrodes is reduced, which is more conducive to improving the sensing accuracy.

Preferably, the plurality of touch electrodes in the present invention may include a plurality of driving electrodes and a plurality of sensing electrodes, and a plurality of transparent wires electrically connected to the plurality of common wires extend from the plurality of sensing electrodes. Therefore, the utility model utilizes a plurality of sensing electrodes with the same electrical characteristics to be connected to the common wire, so as to reduce the number of wires that must be routed separately and the occupied area.

Preferably, the insulating substrate of the present invention may further include a plurality of connection terminals, and the plurality of transparent wires electrically connected to the plurality of common wires and the plurality of driving electrodes are respectively electrically connected to the plurality of connection terminals. Therefore, since the present invention only uses the common wire and the transparent wire electrically connected to the driving electrodes to be electrically connected to the connecting terminals, the number of connecting terminals can be greatly reduced.

Preferably, the plurality of transparent wires electrically connected to the plurality of sensing electrodes of the present invention may respectively include a connection section and a bending section. Wherein, the connecting section is overlapped above or below the corresponding common wire to achieve electrical connection; and the bending section is bent orthogonally so that the connecting section overlaps above or below the corresponding common wire to achieve an electrical connection. Therefore, the transparent wires and common wires of the present invention are electrically connected in such a way that the entire wire junction overlaps, which can significantly improve the stability of the electrical connection compared with the point or line electrical connection. Degree and durability of use.

Preferably, the insulation pad of the capacitive touch panel with common wiring of the present invention can be a ladder-shaped insulation pad, but not limited thereto, other insulation pad shapes that can also achieve the effect of electrical connection, such as ladder Shapes, geometric polygons, or other arbitrary shapes are fine.

Description of drawings

FIG. 1 is a schematic diagram of a known single-layer capacitive touch panel.

FIG. 2A is a multi-layer exploded view of the first preferred embodiment of the present invention.

Fig. 2B is a front view of the first preferred embodiment of the present invention.

Fig. 2C is a sectional view of line A-A of the first preferred embodiment of the present invention.

Fig. 3 is a front view of the second preferred embodiment of the present utility model.

Fig. 4A is a partial enlarged view of the third preferred embodiment of the present invention.

Fig. 4B is a cross-sectional view of line B-B of the third preferred embodiment of the present invention.

The reference signs are explained as follows:

Insulating substrate 2, touch electrode 3, transparent wire 4, insulating pad 5, common wire 6, connecting terminal 7, sensing area 21, routing area 22, driving electrode 31, sensing electrode 32, connecting section 41, bending section 42. Driving electrodes 91, sensing electrodes 92, and wires 93.

Detailed ways

In order to enable the examiner to further understand the structure, features and other purposes of the utility model, the attached preferred embodiments are now attached with accompanying drawings in detail as follows, and the embodiments illustrated using the accompanying drawings are only used to illustrate the utility model The technical solution is not to limit the utility model.

Please refer to Fig. 2A, Fig. 2B and Fig. 2C at the same time, Fig. 2A is the multi-layer exploded view of the first preferred embodiment of the present utility model, Fig. 2B is the front view of the first preferred embodiment of the present utility model, Fig. 2C is a sectional view of line A-A of the first preferred embodiment of the present invention.

As shown in the figure, the common wiring capacitive touch panel of this embodiment mainly includes an insulating substrate 2, a plurality of touch electrodes 3, a plurality of transparent wires 4, a plurality of insulating pads 5, a plurality of The wire 6 and the plurality of connection terminals 7 are connected in common. Wherein, the insulating substrate 2 has a sensing area 21 and a wiring area 22 , and the sensing area 21 is mainly used for arranging a plurality of touch electrodes 3 and the transparent wires 4 connected thereto. In addition, the plurality of touch electrodes 3 includes a plurality of driving electrodes 31 and a plurality of sensing electrodes 32 , each sensing electrode 32 achieves mutual sensing with a driving electrode 31 to form a function of touch sensing.

In addition, the plurality of transparent wires 4 are respectively electrically connected to the plurality of sensing electrodes 32 and the plurality of driving electrodes 31 and extend to the wiring area 22 . In addition, a plurality of insulating pads 5 are formed in the wiring area 22 of the insulating substrate 2 and partially cover the plurality of transparent wires 4 . At the same time, a plurality of common wires 6 are also arranged in the wiring area 22 of the insulating substrate 2, and a plurality of common wires 6 are formed and straddle a plurality of insulating pads 5, and each common wire 6 is electrically connected to multiple A transparent wire 4.

Wherein, each common wire 6 is electrically connected to the sensing electrodes 32 having the same electrical characteristics. In this embodiment, the sensing electrodes 32 located in the same row are electrically connected to the same common wire 6 synchronously. Of course, this is only one embodiment of the present invention, and the present invention is not limited to the common connection of the sensing electrodes 32 in the same row, and the common connection of other arrangement positions is within the scope of the present invention.

In addition, in this embodiment, there are a total of six insulating pads 5, which are partially overlapped on the plurality of transparent wires 4 in the form of three-dimensional space, and the common wire 6 is also formed in the form of three-dimensional space and spans On top of the six insulating pads 5 , the cross-sectional view of its detailed structure can be referred to FIG. 2C . Moreover, the insulating pad 5 in this embodiment is a ladder-shaped insulating pad, but it is not limited thereto. Other shapes of the insulating pad 5 that can also achieve the function of electrical connection, such as stepped shape, geometric polygonal shape, or other arbitrary shapes are all available.

In addition, because a plurality of transparent wires 4 are longitudinally extended to the wiring area 22, and common wires 6 are arranged horizontally for common connection, a bent section 42 is provided on each transparent wire 4 to be connected together. , which uses an orthogonal bend. At the same time, after each transparent wire 4 to be connected passes through a bending section 42, a connection section 41 protrudes from the bottom of the insulating pad 5, and the connection section 41 is overlapped and arranged on the corresponding common connection wire. 6 to achieve electrical connection. In other words, the main purpose of the specially designed connection section 41 in this embodiment is to increase the connection area of the electrical connection, thereby significantly improving the stability and durability of the electrical connection.

In addition, as shown in FIG. 2A and FIG. 2B , there are a plurality of connection terminals 7 for electrically connecting the plurality of common wires 6 and the plurality of transparent wires 4 electrically connected to the plurality of driving electrodes 31 . That is to say, the number of connection terminals 7 has been greatly reduced because it only includes the required number of common wires 6 and driving electrodes 31 .

For example, taking the 7-inch touch panel adopting the innovative technology provided by the utility model as an example, the number of connecting terminals and wires will be greatly reduced from 700 to 800 (bars) in the known non-joint mode to 50~ 60 (bar); Simultaneously, take the 13.3-inch touch panel adopting the innovative technology provided by the utility model as an example, the quantity of its connecting terminals and wires will be changed from 1800 (bar) of the well-known non-joint mode It is amazingly reduced to about 90 (articles).

The manufacturing process of this embodiment is described as follows. First, ITO glass is used as the insulating substrate 2 and etched to form the touch electrodes 3 and the transparent wires 4 . Next, the insulating printing manufacturing process is carried out, and the insulating pad 5 is printed by screen printing, and an insulating material with a thickness of 10-15 um is coated. Then, silver paste is used to print the common wire 6 , which is overlapped on the transparent wire 4 to be electrically connected to form an electrical connection. Of course, it is also possible to add a final step, that is, to perform insulating printing of a highly transparent body on the top of the transparent wire 4 and the common wire 6 to protect these two layers of conductors. Therefore, the utility model can be completed only by common insulating printing and silver paste printing manufacturing processes, without the need for known expensive metal coating manufacturing processes or flexible printed circuit boards to implement jumpers.

Please refer to Fig. 3, which is a front view of the second preferred embodiment of the present utility model. However, the main difference between the second embodiment and the first embodiment is that the second embodiment specifically divides the routing area 22 into two, which are respectively located on the upper and lower sides of the sensing area 21 corresponding to each other. At the same time, the connection direction of the transparent wire 4 , the insulating pad 5 , and the common wire 6 are evenly distributed in the upper and lower routing areas 22 . As a result, the areas occupied by the transparent wires 4 and the common wires 6 can be evenly distributed, and the routing space between the rows and columns of the touch electrodes 3 is reduced, which is more conducive to improving the sensing accuracy.

Please refer to Fig. 4A and Fig. 4B at the same time. Fig. 4A is a partially enlarged view of the third preferred embodiment of the present invention, and Fig. 4B is a sectional view of line B-B of the third preferred embodiment of the present invention. However, the main difference between the third embodiment and the first embodiment is that the overlapping positions of the transparent wire 4 and the common-connection wire 6 in three-dimensional space are reversed. Of course, the order of the steps in the production process is also changed synchronously. The sequence of the production process has been described in detail in the previous paragraph, so it will not be repeated here.

Regarding the structural configuration, as shown in the figure, the main difference is that the six insulating pads 5 are formed in the wiring area 22 of the insulating substrate 2 and partially cover the common wire 6 . Moreover, the plurality of transparent wires 4 are respectively electrically connected to the plurality of touch electrodes 3 and extend to the plurality of insulating pads 5 in the wiring area 22 . In other words, in this embodiment, the common wire 6 is located at the bottom layer, while the transparent wire 4 is located at the top layer, and the others remain unchanged. Thus, this embodiment also achieves the same effect as that of the first embodiment. In addition, the insulating pad 5 of this embodiment adopts a stepped shape, which can further be used to illustrate that the shape of the insulating pad 5 of the present invention is not limited by the trapezoidal shape.

It should be declared that the content of the above utility model and specific implementation methods are intended to prove the practical application of the technical solutions provided by the utility model, and should not be interpreted as limiting the scope of protection of the utility model. Those skilled in the art may make various modifications, equivalent replacements, or improvements within the spirit and principles of the present utility model. The scope of protection of the utility model shall be determined by the appended claims.

Claims (8)

1. A capacitive touch panel with common wiring, characterized in that, the capacitive touch panel comprises: an insulating substrate, which includes a sensing area and at least one wiring area; a plurality of touch electrodes arranged in the sensing area of the insulating substrate; A plurality of transparent wires are respectively electrically connected to the plurality of touch electrodes and extend to the at least one wiring area; a plurality of insulating pads formed in the at least one wiring area of the insulating substrate and partially covering the plurality of transparent wires; and A plurality of common connection wires are arranged in the at least one wiring area of the insulating substrate, the plurality of common connection wires are formed and straddle the plurality of insulating pads, and each common connection wire is electrically connected to the at least two of the plurality of transparent wires. 2. A capacitive touch panel with common wiring, characterized in that, the capacitive touch panel comprises: an insulating substrate, which includes a sensing area and at least one wiring area; A plurality of common wires are located on the at least one wiring area of the insulating substrate; A plurality of insulating pads are formed in the at least one wiring area of the insulating substrate and partially cover the plurality of common wires; a plurality of touch electrodes arranged on the sensing area of the insulating substrate; and A plurality of transparent wires are respectively electrically connected to the plurality of touch electrodes and extended to the plurality of insulating pads in the at least one wiring area; wherein, each common wire is electrically connected to the plurality of transparent wires At least 2 of them. 3 . The capacitive touch panel according to claim 1 or 2 , wherein the insulating substrate comprises two wiring areas, which are respectively located on two corresponding side surfaces of the sensing area. 4 . 4. The capacitive touch panel according to claim 1 or 2, wherein the plurality of touch electrodes include a plurality of driving electrodes and a plurality of sensing electrodes, and the electrical properties of the plurality of common wires are The plurality of connected transparent wires extend from the plurality of sensing electrodes. 5. The capacitive touch panel according to claim 4, wherein the insulating substrate further comprises a plurality of connection terminals, and the plurality of common wires are electrically connected to the plurality of driving electrodes. The plurality of transparent wires are respectively electrically connected to the plurality of connection terminals. 6. The capacitive touch panel according to claim 4, wherein the plurality of transparent wires electrically connected to the plurality of sensing electrodes respectively comprise a connecting section, which overlaps the corresponding above or below the above-mentioned common ground wire to achieve electrical connection. 7. The capacitive touch panel according to claim 6, wherein the plurality of transparent wires electrically connected to the plurality of sensing electrodes each include a bending section, which is bent orthogonally so that the plurality of transparent wires The connecting segments are overlapped above or below the corresponding common wires to achieve electrical connection. 8. The capacitive touch panel according to claim 1 or 2, wherein each insulating pad is a ladder-shaped insulating pad.

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