CN100570544C - Wiring structure of a touch panel - Google Patents

Abstract

A wiring structure of a touch panel, comprising: the glass substrate is provided with a transparent conducting layer on one surface; a plurality of electric control lines which are arranged at the frame position of the glass substrate in a winding way; the flexible circuit board is arranged between one side edge of the transparent conducting layer and the electric control circuit on the same side, extends out of the edge of the glass substrate and is connected to a control circuit arranged on the circuit board of the touch panel; and the plurality of lead terminals are arranged on the transparent conductive layer and positioned between each electric control circuit and the flexible circuit board. The flexible circuit board has the beneficial effects that the flexible circuit board replaces the traditional wiring of the conducting wire, the wiring area is reduced, and the purpose of narrowing the wiring of the touch panel is achieved.

Description

Wiring structure of a touch panel

technical field

The invention relates to a touch panel, specifically a wiring structure of a touch panel, which uses a flexible circuit board to replace the wires of the glass substrate, or transfers the wires to the back of the glass substrate to narrow the wiring of the touch panel the goal of.

Background technique

In recent years, tactile man-machine interface, such as: touch panel (Touch Panel), has been widely used in global positioning system (GPS), personal digital assistant (PDA), cellular phone (cellular phone) and palmtop computer (Hand-held PC) and other electronic products, replacing traditional input devices (such as: keyboard and mouse, etc.). This significant change in design not only improves the human-machine interface affinity of the above electronic devices, but also omits traditional input devices, freeing up more space for installing large display panels, which is convenient for users to browse data.

Generally speaking, the traditional resistive touch panel can be divided into four-wire (4Wire), five-wire or six-wire according to the different wiring methods of the electric control circuit. Take the panel as an example, as shown in Figure 1, the four electric control lines of the transparent conductive glass substrate 1 (such as: ITO Glass) of the touch panel in the X and Y axis directions and the transparent conductive film (such as: ITO Film, not shown in the figure) ) an electric control circuit for sampling the voltage values of the X and Y axes, a total of 5 electric control circuits are arranged on the frame position between the edge of the touch panel and the transparent action area 11 . When the user touches the touch panel with a finger or a pen (assuming the position of touching P), a control circuit provided on the circuit board of the touch panel will control the two ends of the electric control circuit 10 on the transparent conductive glass substrate. Supply a power supply of 5 volts, and make another electric control line 16 be in a ground state (ground, that is, the voltage at both ends is equal to zero). The control circuit can sample the voltage value of the Y-axis Vpy, otherwise, when the control circuit supplies a 5-volt power supply to both ends of the electric control circuit 14 of the transparent conductive glass substrate, and makes the other electric control circuit 12 be in a grounded state ( ground, that is, the voltage at both ends is equal to zero), the electric control circuit on the transparent conductive film will sample the voltage value of Vpx in the X-axis, and the voltage value of Vpx and Vpy can be quickly known by the calculation and comparison of the control circuit. The position of the coordinate P of the collision.

In addition, one end of the electric control circuit 10, 12, 14 and 16 is respectively connected to the wire 20, 22, 24 and 26, and the other end extends to the transparent conductive glass substrate 1 and the transparent conductive film along the edge of the transparent conductive glass substrate 1 and the transparent conductive film. The same side of the conductive film is meanderingly extended to the central position of the side, and the other ends of the conductors 20, 22, 24 and 26 are respectively connected to one end of a flexible circuit board (not shown). The other end of the flexible circuit board extends beyond the edge of the transparent conductive glass substrate 1 and the transparent conductive film, and is connected to a control circuit provided on the circuit board of the touch panel. In other words, the The wires 20 , 22 , 24 and 26 of the touch panel and the wiring areas of the electric control circuits 10 , 12 , 14 and 16 are located between the edge of the touch panel and the border of the transparent action area.

Due to the continuous improvement of the production technology of the LCD panel and the demand for large windows, the frame design of the LCD panel is getting narrower and narrower, so that the width of the frame of the touch panel needs to be changed along with the frame of the LCD panel, and the wiring and the electric control The sharp reduction of the routing area of the circuit not only directly tests the ability of the touch panel circuit design, but even becomes a design obstacle. Therefore, the following methods are currently used to solve the routing problem caused by the narrow frame:

1. The line width is thinned to reduce the wiring area. However, this method has the disadvantages of increasing the resistance and increasing the drop, which will attenuate the signal and be susceptible to interference. In addition, the finer line width increases the difficulty of processing and reduces the yield rate.

2. Overlapping lines (making the wires overlap with the electric control lines) reduces the wiring area (such as: Taiwan Patent No. 544824). In this method, the circuit is overlapped on the transparent conductive glass substrate, so that the risk of short circuit between the wire and the electric control circuit is increased, the processing difficulty is increased, the yield rate is reduced, the working procedure and time are increased, and the production cost is increased.

3. Transfer part of the wires to the transparent conductive film to reduce the wiring area. Since the transparent conductive film is not resistant to high temperature, and the adhesion and durability of the circuit formed on the transparent conductive film is not as good as that processed on the transparent conductive glass substrate, the work procedure and time will be increased, which will increase the production cost.

Therefore, how to develop a better structure for arranging electric control circuits and wires between narrow frames has become an important issue that designers and manufacturers of touch panels need to solve urgently.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the object of the present invention is to provide a wiring structure of a touch panel.

The present invention provides: a wiring structure of a touch panel, characterized in that it comprises:

A glass substrate, one side of the glass substrate is provided with a transparent conductive layer;

A plurality of electric control circuits are meanderingly arranged at the frame position of the glass substrate;

A flexible circuit board is arranged between one edge of the transparent conductive layer and the electric control circuit on the same side, the flexible circuit board extends beyond the edge of the glass substrate and is connected to the a control circuit provided on the circuit board of the touch panel;

A plurality of wire terminals are arranged on the transparent conductive layer, and are located between each of the electric control circuits and the flexible circuit board.

On the transparent conductive layer, the electric control circuit not adjacent to the flexible circuit board is provided with an extension wire, and the extension wire extends to the adjacent flexible circuit board, and the extension wire Also connected to one of the wire ends.

The flexible circuit board is provided with a plurality of conducting lines, and the conducting lines are respectively connected to a wire terminal.

The frame of the glass substrate is located between the edge of the transparent conductive layer and the transparent action area set on the glass substrate.

The present invention also provides: a wiring structure of a touch panel, characterized in that it comprises:

A glass substrate, one side of the glass substrate is provided with a transparent conductive layer;

A plurality of electric control circuits meanderingly arranged at the frame position along the edge of the glass substrate;

A plurality of wires are arranged on the side of the glass substrate facing away from the transparent conductive layer, one end of each of the wires extends to a position close to one side edge of the glass substrate, and the other end extends to the side edge of the glass substrate respectively. The corresponding position of an electric control circuit;

A plurality of conductive materials are arranged on the side of the glass substrate, between the electric control circuit and the other end of a wire corresponding to the electric control circuit.

The conductive material can be a flexible circuit board.

The frame of the glass substrate is located between the edge of the transparent conductive layer and the transparent action area set on the glass substrate.

The present invention also provides: a wiring structure of a touch panel, characterized in that it comprises:

A glass substrate, one side of the glass substrate is provided with a transparent conductive layer;

A plurality of electric control circuits meanderingly arranged at the frame position along the edge of the glass substrate;

A plurality of wires are arranged on the side of the glass substrate facing away from the transparent conductive layer, one end of each of the wires extends to a position close to one side edge of the glass substrate, and the other end extends to the edge of the glass substrate respectively. The position of an electric control circuit corresponding to the wire;

A plurality of conductive holes are arranged between the conductive wires on the glass substrate and the electric control circuits corresponding to the conductive wires, and the conductive holes are provided with electrical connections between the conductive wires and the conductive wires. A conductive material for the electric control circuit.

The frame of the glass substrate is located between the edge of the transparent conductive layer and the transparent action area set on the glass substrate.

The beneficial effect of the present invention is that the wiring area is reduced by using the flexible circuit board instead of the traditional wiring; and the problem of laying the traditional wiring and the electric control circuit on the glass substrate is solved, the wiring area on the same surface is reduced, and the wiring area is achieved. The purpose of narrowing the touch panel wiring.

Description of drawings

Figure 1 is a schematic diagram of the layout of electric control circuits and wires on a traditional glass substrate;

Fig. 2 is a schematic diagram of the layout of the electric control circuit and wires of a glass substrate of the present invention;

Fig. 3 is a schematic diagram of the connection between the wire and the flexible circuit board in Fig. 2;

4 is a schematic diagram of an electric control circuit provided on one side of another glass substrate of the present invention;

Fig. 5 is a schematic diagram of wires provided on the other side of another glass substrate in Fig. 4;

Fig. 6 is a schematic diagram of conductive material of another glass substrate in Fig. 4;

FIG. 7 is a schematic diagram of a conductive material of another glass substrate in FIG. 5;

Fig. 8 is a schematic diagram of a conductive hole of an electric control circuit of another glass substrate;

FIG. 9 is a schematic diagram of conductive holes of wires in yet another glass substrate of FIG. 8 .

Description of main component symbols:

Glass substrate 3 Electric control circuit 30 Transparent action area 32

Wire terminal 34 Wire 35 Extension wire 36

Conductive material 37 Conductive hole 38 Flexible circuit board 4

Detailed ways

Fig. 2 and Fig. 3 show the wiring structure of a kind of touch panel of the present invention, one side of a glass substrate 3 is provided with a transparent conductive layer (not shown in the figure), the glass substrate 3 moves along the edge of the transparent conductive layer and transparent A plurality of electric control circuits 30 are meanderingly arranged around the frame position between the regions 32, and a flexible circuit board 4 is provided between one edge of the transparent conductive layer and the electric control circuit 30 on the same side, and the flexible circuit board 4 extends to The edge of the glass substrate 3 is connected to a control circuit of the circuit board of the touch panel, and the transparent conductive layer is respectively provided with a wire terminal 34 between each electric control circuit 30 and the flexible circuit board 4, so, through the flexible circuit board 4 The permanent circuit board 4 replaces the existing multiple wires arranged in parallel to reduce the wiring area and achieve the purpose of narrowing the wiring of the touch panel.

In the present invention, on the transparent conductive layer, the electric control circuit 30 not adjacent to the flexible circuit board 4 is provided with an extension wire 36, the extension wire 36 extends to the adjacent flexible circuit board 4, and the extension wire 36 is also connected to it On one wire end point 34 , the flexible circuit board 4 is provided with a plurality of conducting lines (not shown in the figure), and the conducting lines are respectively connected to a wire end point 34 .

Figure 4 and Figure 5 show another wiring structure of the touch panel of the present invention, a transparent conductive layer is arranged on one side of a glass substrate 3, and the glass substrate 3 is along the edge of the transparent conductive layer and between the transparent action area 32 A plurality of electric control lines 30 are meanderingly wound around the frame position of the glass substrate 3, and a plurality of wires 35 are arranged on the side of the glass substrate 3 facing away from the transparent conductive layer, and one end of each wire 35 extends to an edge position close to the side of the glass substrate 3, The other end then extends to a position corresponding to an electric control circuit 30 respectively. On the side of the glass substrate 3, a conductive material 37 is provided between the electric control circuit 30 and the other end of a lead 35 corresponding to the electric control circuit (as shown in FIG. 6 7), in this way, the area where the electric control circuit 30 can be arranged on the transparent conductive layer of the glass substrate 3 will not be occupied by wires, so as to reduce the wiring area on the same surface and achieve the purpose of narrowing the wiring of the touch panel .

In the present invention, the conductive material 37 can be a flexible circuit board, or it can be printed or coated with conductive ink, or a metal conductive layer can be formed by physical or chemical vapor deposition, and it can be connected to and connected to the electric control circuit. between the other ends of a corresponding wire.

Fig. 8 and Fig. 9 show yet another wiring structure of the touch panel of the invention, a glass substrate 3 is provided with a transparent conductive layer on one side, and the glass substrate 3 is along the frame between the edge of the transparent conductive layer and the transparent action area 32 A plurality of electric control circuits 30 are arranged in a meandering position, and a plurality of wires 35 are arranged on the side of the glass substrate 3 facing away from the transparent conductive layer. Then respectively extend to a position corresponding to an electric control circuit 30, and one end corresponding to the electric control circuit 30 of the lead 35 on the glass substrate 3 and the electric control circuit 30 corresponding to the lead 35 are respectively provided with a conductive hole 38, the conductive hole 38 is provided with a conductive material that can electrically connect the wire 35 and the electric control circuit 30 . In this way, similar to the provision of the conductive material on the side of the glass substrate, the wiring area on the same surface can be reduced to achieve the purpose of narrowing the wiring of the touch panel.

In the present invention, the conductive hole 38 is formed on the glass substrate by drilling with tools such as laser (Laser) drilling (CO2, YAG, Excimer, Plasma, UV, etc.), water jet drilling, and mechanical cutter.

In the above embodiments, the electric control circuit 30, the wire 35, and the extension wire 36 can be formed by conductive ink printing, spraying (for example: silver glue, graphite, copper glue, etc.), physical or chemical vapor deposition.

The above description is only the best specific embodiment of the present invention, but the structural features of the present invention are not limited thereto, and any changes or modifications that can be easily conceived by those skilled in the art in the field of the present invention can be covered in the present invention. within the protection scope of the present invention.

Claims (9)

1, a kind of wire structures of contact panel is characterized in that, comprising:

One glass substrate, the one side of described glass substrate is provided with a transparency conducting layer;

A plurality of automatically controlled circuits, the ground that wriggles is around the bezel locations that is arranged on described glass substrate;

One flexible circuit board is arranged between the automatically controlled circuit of lateral edges of described transparency conducting layer and homonymy, and described flexible circuit board extends to outside the edge of described glass substrate, and is connected to the set control circuit of circuit board of described contact panel;

A plurality of lead end points are arranged on described transparency conducting layer, are positioned between each described automatically controlled circuit and described flexible circuit board.

2, wire structures as claimed in claim 1, it is characterized in that, on the described transparency conducting layer, not adjacent with described flexible circuit board automatically controlled circuit is provided with an extension wire, described extension wire extends to adjacent described flexible circuit board, and described extension wire also is connected on one of them lead end points.

3, wire structures as claimed in claim 1 is characterized in that, described flexible circuit board is provided with a plurality of circuits that connect, and the described circuit that connects is connected with a lead end points respectively.

4, wire structures as claimed in claim 1 is characterized in that, between the transparent active region that the frame of described glass substrate is provided with to the described glass substrate at the edge of described transparency conducting layer.

5, a kind of wire structures of contact panel is characterized in that, comprising:

One glass substrate, the one side of described glass substrate is provided with a transparency conducting layer;

A plurality of automatically controlled circuits, the ground that wriggles is around the bezel locations that is arranged on described glass substrate edge;

A plurality of leads are arranged on the one side of described glass substrate back to described transparency conducting layer, and an end of each described lead extends to the lateral edges position near described glass substrate, and the other end then extends to respectively and a position that automatically controlled circuit is corresponding;

A plurality of conductive materials are arranged on the side of described glass substrate, are positioned between the other end of described automatically controlled circuit and a lead corresponding with described automatically controlled circuit.

6, wire structures as claimed in claim 5 is characterized in that, described conductive material can be a flexible circuit board.

7, wire structures as claimed in claim 5 is characterized in that, between the transparent active region that the frame of described glass substrate is provided with to the described glass substrate at the edge of described transparency conducting layer.

8, a kind of wire structures of contact panel is characterized in that, comprising:

One glass substrate, the one side of described glass substrate is provided with a transparency conducting layer;

A plurality of automatically controlled circuits, the ground that wriggles is around the bezel locations that is arranged on described glass substrate edge;

A plurality of leads, be arranged on the one side of described glass substrate back to described transparency conducting layer, one end of each described lead extends to the lateral edges position near described glass substrate, and the other end then extends to the position of an automatically controlled circuit corresponding with lead respectively;

A plurality of conductive holes are arranged between the described lead and the automatically controlled circuit corresponding with described lead on the described glass substrate, are provided with in the described conductive hole and can electrically connect a described conductive material that waits lead and described automatically controlled circuit.

9, wire structures as claimed in claim 8 is characterized in that, the frame of described glass substrate at the edge of described transparency conducting layer to the described glass substrate between the set transparent active region.

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