CN103425307A - Sensing circuit structure of touch panel - Google Patents

Abstract

The invention discloses an induction circuit structure of a touch panel, which is formed by arranging X-axis carbon beams and Y-axis carbon beams which are mutually staggered on a transparent substrate with a cementing layer, wherein each X-axis carbon beam and each Y-axis carbon beam are respectively provided with a conductive wire and one is coated by an insulating layer. In the manufacturing process of the sensing circuit, the purposes of simplifying the manufacturing steps and reducing the manufacturing cost are achieved without carrying out insulation isolation treatment.

Description

Sensing circuit structure of touch panel

technical field

The present invention relates to a touch panel, in particular to a sensing circuit structure of a touch panel.

Background technique

According to the sensing principle, the touch panel can be mainly divided into capacitive type and resistive type, among which the capacitive touch panel is the mainstream control method at present.

Referring to Fig. 1 and Fig. 2, the capacitive touch panel mainly uses a piece of transparent glass as the substrate 11, and the first circuit layer 12 with a plurality of X-axis sensing electrodes 121 arranged in parallel is arranged on the substrate 11, and a first circuit layer 12 with parallel arranged The second circuit layer 13 of a plurality of Y-axis sensing electrodes 131 , and each X-axis sensing electrode 121 and each Y-axis sensing electrode 131 are interlaced to form a checkerboard-like sensing array. In order to ensure the normal operation of the overlapping parts of each X-axis sensing electrode 121 and each Y-axis sensing electrode 131, an insulating layer 14 is used to electrically insulate each overlapping part, so as to use the electrostatic field change in the sensing array to calculate the contact. point location. Of course, the capacitive touch panel further includes other insulating layers 15 and grounding layers 16 .

However, in terms of the manufacturing process of the sensing circuit of the touch panel, the first circuit layer 12 of the plurality of X-axis sensing electrodes 121 and the second circuit layer of the plurality of Y-axis sensing electrodes 131 are respectively formed on one side of the single transparent substrate 11. 13. Since the X-axis and Y-axis sensing electrodes 121 and 131 are arranged in a matrix, each X-axis sensing electrode 121 and each Y-axis sensing electrode 131 will overlap and overlap, so insulation and isolation treatment must be performed, but the insulation isolation treatment will increase The process steps highlight the defects of the complicated process of the sensing circuit of the touch panel.

In addition, another known manufacturing process of the sensing circuit of the touch panel is to sputter a plurality of linear X-axis sensing electrodes on the substrate, and between each X-axis sensing electrodes to sputter with X-axis sensing electrodes. The Y-axis sensing electrode line segment that the sensing electrode does not touch is then coated with an insulating layer on the X-axis sensing electrode, and the insulating layer is located on the path where each Y-axis sensing electrode line segment is connected. Finally, each line segment is made Y by sputtering. The shaft sensing electrodes are electrically connected, and this kind of manufacturing process highlights the defects of complicated and lengthy manufacturing process and high cost.

Contents of the invention

The technical problem to be solved by the present invention is to provide a sensing circuit structure of a touch panel, which can simplify the process steps, reduce the process cost, and improve the sensitivity of touch sensing.

In order to solve the above technical problems, the present invention provides a sensing circuit structure of a touch panel, comprising: a transparent substrate having a use end surface and a bonding end surface opposite to the use end surface; The joint end surface of the transparent substrate; a plurality of X-axis carbon bundles are arranged in parallel on the joint end surface and are fixed by the adhesive layer, and each X-axis carbon bundle has a first conductive wire and a covering of the first conductive wire The first insulating film; a plurality of Y-axis carbon bundles, arranged in parallel on the joint end surface and interlaced with each X-axis carbon bundle and bonded by the adhesive layer, each Y-axis carbon bundle has a second conductive wire and a A second insulating film covering the second conductive wire.

Preferably, the adhesive layer is an ultraviolet curable adhesive.

Preferably, the first conductive wire is carbon fiber.

Preferably, the second conductive wire is carbon fiber.

The present invention is mainly composed of interlaced X-axis carbon bundles and Y-axis carbon bundles arranged on a transparent substrate with a glued layer, and each X-axis carbon bundle and Y-axis carbon bundle has a conductive wire (carbon fiber) and an insulated Therefore, the induction circuit can interleave the X-axis carbon beam and the Y-axis carbon beam in the manufacturing process, and then directly set it on the transparent substrate with the glued layer. Finally, the glued layer is cured by irradiating ultraviolet rays (UV) and the X The axis carbon beam, the Y axis carbon beam and the transparent substrate are combined into one body, and the induction circuit does not need to be insulated and isolated during the production process, which simplifies the process steps and reduces the process cost.

Description of drawings

FIG. 1 is a three-dimensional exploded view of a known touch panel;

2 is a partial sectional view of a sensing circuit of a known touch panel;

Fig. 3 is a three-dimensional exploded view of the present invention;

Fig. 4 is a three-dimensional combined view of the present invention;

Fig. 5 is a side view of Fig. 4;

Fig. 6 is a side view of another angle of view of Fig. 4;

Fig. 7 is a partially enlarged view of another implementation state of the present invention, showing a state in which X-axis carbon bundles and Y-axis carbon bundles are woven into a mesh.

Wherein the reference signs are explained as follows:

Substrate 11 The first circuit layer 12

X-axis sensing electrode 121 Second circuit layer 13

Y-axis induction electrode 131 insulation layer 14, 15

Ground plane 16

Transparent substrate 20 Use end face 21

Combined end face 22

glued layer 30

X-axis carbon beam 40 The first conductive wire 41

first insulating film 42

Y-axis carbon beam 50 Second conductive wire 51

second insulating film 52

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 3 and Fig. 4, a sensing circuit structure of a touch panel provided by an embodiment of the present invention is mainly composed of a transparent substrate 20, a glue layer 30, a plurality of X-axis carbon bundles 40 and a plurality of Y-axis carbon bundles. Bundle of 50 compositions.

The transparent substrate 20 has a use end surface 21 and a joint end surface 22 opposite to the use end surface 21 ; the transparent substrate 20 can be glass or a transparent polymer plate.

The adhesive layer 30 is coated on the bonding end surface 22 of the transparent substrate 20; the adhesive layer 30 in this embodiment is an ultraviolet curable adhesive.

Referring to FIG. 5 , each X-axis carbon bundle 40 is arranged parallel to the joint end surface 22 and is fixed by the glue layer 30 . Each X-axis carbon bundle 40 has a first conductive wire 41 and a first insulating layer covering the first conductive wire 41. Membrane 42; in this embodiment, the first conductive wire 41 is carbon fiber.

Referring to FIG. 6, each Y-axis carbon bundle 50 is arranged parallel to the joint end surface 22 and intersects with each X-axis carbon bundle 40 and is bonded by the glue layer 30. Each Y-axis carbon bundle 50 has a second conductive wire 51 and a coating The second insulating film 52 of the second conductive wire 51; in this embodiment, the second conductive wire 51 is carbon fiber.

The above is the description of the structure and configuration of each main component of the embodiment of the present invention, and the functions of the present invention are described below.

The induction circuit structure of the present invention is mainly composed of interlaced X-axis carbon bundles 40 and Y-axis carbon bundles 50 arranged on a transparent substrate 20 with an adhesive layer 30. Due to the conductive wires of the X-axis carbon bundles 40 and Y-axis carbon bundles 50 (Carbon fiber) is covered by an insulating layer. Therefore, the induction circuit can be directly arranged on the transparent substrate 20 with the adhesive layer 30 after the X-axis carbon beam 40 and the Y-axis carbon beam 50 are interlaced in the manufacturing process, and finally irradiated Ultraviolet (UV) cures the adhesive layer 30 to combine the X-axis carbon bundles 40 , Y-axis carbon bundles 50 and the transparent substrate 20 into one, thus completing the sensing circuit structure of the touch panel. Therefore, in the process of manufacturing the induction circuit of the present invention, it is not necessary to perform insulation and isolation treatment, and it is not necessary to combine the X-axis carbon beam 40, the Y-axis carbon beam 50 and the transparent substrate 20 through a sputtering process. Therefore, , can indeed achieve the purpose of simplifying the process steps and reducing the process cost.

It is worth mentioning that, in terms of signal transmission and reception, the induction circuit structure of the present invention, in addition to using the X-axis carbon beam 40 as the transmitting end, and the Y-axis carbon beam 50 as the receiving end, or vice versa, please refer to FIG. 7 As shown, since the conductive wires (carbon fibers) of the X-axis carbon bundles 40 and Y-axis carbon bundles 50 are covered by an insulating layer, the X-axis carbon bundles 40 and the Y-axis carbon bundles 50 can be directly woven into a mesh without They will be in electrical contact with each other, and in the transmission and reception of signals, odd-numbered carbon beams can be used as the transmitting end, and even-numbered carbon beams can be used as the receiving end, or vice versa. Rapidly changing capacitance improves the sensitivity of touch sensing.

In summary, the above-mentioned embodiments and accompanying drawings are only preferred embodiments of the present invention, and are not intended to limit the present invention. The equivalent changes and modifications made in the scope of the patent all belong to the scope covered by the patent of the present invention.

Claims (4)

1. the sensor circuit structure of a contact panel, is characterized in that, comprises:

One transparency carrier, have a use end face and be in reverse to described use end face in conjunction with end face;

One cementing layer, be located at described transparency carrier in conjunction with end face;

A plurality of X-axis carbon bundles, be set in parallel in describedly in conjunction with end face and cemented by described cementing layer, and each X-axis carbon bundle has the first dielectric film that one first conductor wire and coats described the first conductor wire;

A plurality of Y-axis carbon bundles, be set in parallel in describedly in conjunction with end face and staggered and cemented by described cementing layer with each X-axis carbon bundle, and each Y-axis carbon bundle has the second dielectric film that one second conductor wire and coats described the second conductor wire.

2. the sensor circuit structure of contact panel as claimed in claim 1, it is characterized in that: described cementing layer is a ultraviolet-curing adhesive agent.

3. the sensor circuit structure of contact panel as claimed in claim 1, it is characterized in that: described the first conductor wire is carbon fiber.

4. the sensor circuit structure of contact panel as claimed in claim 1, it is characterized in that: described the second conductor wire is carbon fiber.

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