KR101444118B1 - Improved one layer capacitive touch panel - Google Patents

Abstract

According to an embodiment of the present invention, there is provided an electrostatic touch panel including a plurality of touch pattern groups, wherein the touch pattern group includes a plurality of touch pads disposed on a single surface within a display area, Some of the pads are connected by an outer wiring outside the display area and the rest of the pads are connected by the first inner wiring in the display area and some of the touch pads connected in the second axial direction are connected to each other in the display area And connected by a second internal wiring which does not overlap with the first internal wiring.

Description

Improved One Layer Capacitive Touch Panel {IMPROVED ONE LAYER CAPACITIVE TOUCH PANEL}

The present invention relates to an improved one-layer capacitive touch panel, and more particularly, to a one-layer capacitive touch panel in which a wiring area is simplified.

The touch screen panel is an input device for touching a user's hand or other contact means based on the contents displayed by the image display device so as to input a command of the user. To this end, the touch screen panel is provided on the front face of the image display device and converts the contact position, which is in direct contact with a human hand or other contact means, into an electrical signal. Accordingly, the instruction content selected at the contact position is accepted as the input signal.

As a method of implementing a touch screen panel, a resistive film type, a light sensing type, and a capacitive type are known. Among them, the capacitive touch panel converts the contact position into an electrical signal by sensing a change in the capacitance that the conductive sensing pattern forms with other peripheral sensing patterns or the ground electrode when a human hand or an object touches.

1 is a plan view of a conventional electrostatic touch screen panel.

1A, the capacitive touch screen panel according to the prior art includes a linear linear touch pad 5a, a linear linear touch pad 5b, and a touch drive IC for analyzing a touch signal. This touch screen panel detects the magnitude of the capacitance formed between the linear touch pad 5 and the fingers. The horizontal linear touch pad 5a and the longitudinal linear touch pad 5b are scanned, So that a plurality of touch points can be recognized.

However, in the electrostatic touch screen panel according to the related art, the horizontal linear touch pad 5a and the linear linear touch pad 5b in the horizontal direction are formed of the expensive ITO layer, which increases the cost of the product , A process of forming the respective touch pads on both sides with the substrate interposed therebetween requires a complicated manufacturing process.

1B is a plan view of another example of a capacitive touch screen panel according to the related art.

As shown in FIG. 1B, in the electrostatic touch screen panel, a first touch pad 7a and a second touch pad 7b are formed on one layer unlike FIG. However, since the first touch pads 7a are connected in the longitudinal direction and the second touch pads 7b are connected in the horizontal direction, they have substantially the same connection relationship as the touch screen panel shown in Fig. That is, the embodiment shown in FIG. 1B has a feature that the wiring region is formed into a plurality of layers instead of forming the touch pads 7a and 7b on a single surface (single layer).

Therefore, the embodiment shown in FIG. 1B is also substantially the same as the embodiment shown in FIG. 1A and the driving and sensing principle. Accordingly, the touch screen panel can control the magnitude of the capacitance formed between the first touch pad 7a and the second touch pad 7b and the fingers based on the charge amount of the charge, the discharge amount, the charge time, or the number of pulses of the drive signal within the predetermined time So that the touch points can be recognized by extracting the positions of the contact positions with respect to the first axis direction and the second axis direction.

As such conventional techniques, Patent Document 1 and Patent Document 2 are disclosed as follows.

1B, the thickness of the touch screen panel can be reduced by forming a touch pad on a single surface. However, since a region where the respective wires overlap each other occurs, There is a problem in that the number of jumps between wirings is increased by using a bridge or a via hole or the like. Even if the display area of the touch screen panel is formed as a single surface due to the complicated structure in the wiring area, there arises a problem that the overall thickness of the touch panel increases, the edge width increases, and the yield decreases due to the process complexity.

Therefore, it is necessary to develop a single layer touch screen panel that reduces the complexity in the wiring area.

(Patent Document 1) KR885730 B

(Patent Document 2) US2009-0091551 A

SUMMARY OF THE INVENTION The present invention provides a single-layer touch screen panel with improved complexity in a wiring region.

According to an embodiment of the present invention, there is provided an electrostatic touch panel including a plurality of touch pattern groups, wherein the touch pattern group includes a plurality of touch pads disposed on a single surface within a display area Wherein a part of the touch pads connected in the first axis direction is connected by an outer wire outside the display area and the remainder is connected by a first inner wire in the display area, Wherein a part of the first internal wiring is connected by a second internal wiring which does not overlap with the first internal wiring in the display area.

In one embodiment of the present invention, the touch pads connected in the first axial direction belonging to mutually different touch pattern groups are connected by the outline wiring, and the touch pads connected in the first axial direction belonging to the same touch pattern group And can be connected by the first internal wiring.

In one embodiment of the present invention, the first axis direction and the second axis direction may be orthogonal to each other.

In one embodiment of the present invention, the first internal wiring and the second internal wiring may be made of the same material as the touch pad.

In an embodiment of the present invention, the touch pad may be formed of a transparent conductive material.

In an embodiment of the present invention, the touch pad may further include a touch sensing unit that senses a touch through a change in capacitance generated during a touch.

In one embodiment of the present invention, a personal portable terminal including an electrostatic touch panel may be included.

According to the present invention, since the electrostatic touch panel is formed as a single layer, the production cost can be reduced and the manufacturing process can be simplified.

In addition, according to the present invention, the area where the wirings connected to the touch pad are overlapped with each other is reduced, so that the number of jumps between wirings can be greatly reduced.

It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims.

FIG. 1A is a plan view of a conventional electrostatic touch screen panel. FIG.
1B is a plan view of another example of a capacitive touch screen panel according to the related art.
FIG. 2 is a view showing a touch pattern group of the capacitive touch panel according to an embodiment of the present invention.
3 is a diagram illustrating an example of a touch pattern group of the capacitive touch panel according to another embodiment of the present invention.
4 is a view showing an example of a touch pattern group of the electrostatic touch panel according to another embodiment of the present invention.
5 is a view showing an example of a touch pattern group of the electrostatic touch panel according to another embodiment of the present invention.
6 is a diagram illustrating an example of a touch pattern group of the electrostatic touch panel according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "including" an element, it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise. Also, the terms "part," " module, "and the like described in the specification mean units for processing at least one function or operation, which may be implemented in hardware or software or a combination of hardware and software .

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "indirectly connected" . Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a view showing a touch pattern group of the capacitive touch panel according to an embodiment of the present invention.

Referring to FIG. 2, the electrostatic touch panel according to an embodiment of the present invention includes a plurality of touch pattern groups 100.

The touch pattern group 100 includes a plurality of touch pads 200 disposed on a single surface within a display area.

At this time, the touch pad 200 can form a capacitance between the finger and the touch input tool such as a finger or a conductor as a patterned electrode on the substrate to detect the touch input.

In addition, the touch pad 200 may be formed of a transparent conductive material. For example, the touch pad 200 may be formed of a transparent conductive material such as ITO (Indium Tin Oxide), ATO (Antimony Tin Oxide), CNT (Carbon Nano Tube), IZO (Indium Zinc Oxide) However, in another example, the touch pad 200 may be formed of metal. Here, the plurality of touch pads 200 are arranged in the form of independent polygons across the entire surface of the touch screen.

A part of the touch pads connected in the Y-axis direction are connected by the outer wiring lines A1, A2, A3 and A4 outside the display area and the rest are connected to the first inner wiring lines B1, B2, B3 and B4 in the display area, Lt; / RTI > Some of the touch pads connected in the X-axis direction are connected by the second internal wiring C1 that does not overlap with the first internal wirings B1, B2, B3, B4.

The touch pads connected to each other in the Y-axis direction belonging to different touch pattern groups are connected by the outer wires A1, A2, A3, A4, and the touch pads connected to the same touch pattern group in the Y- And can be connected by the wires B1, B2, B3, and B4.

For example, the touch pads connected in the Y-axis direction inside the same touch pattern group 100 are connected by the first internal wirings B1, B2, B3, and B4. However, the touch pads in the T axis direction of different touch pattern groups (not shown) can be connected by the outer wiring lines A1, A2, A3, and A4. In another example, the touch pads connected in the Y-axis direction within the same touch pattern group 100 are connected by the first internal wirings B1, B2, B3, and B4, A1, A2, A3 and A4 from the touch pads of the pattern group (not shown).

At this time, the first internal wirings (B1, B2, B3, B4) and the second internal wirings (C1) can be arranged on the same plane. Here, the display area indicates an area for recognizing a touch on the touch panel and displaying a corresponding screen, and may include an area for sensing a touch, for example, excluding the bezel.

The outer wiring lines A1, A2, A3, and A4, the first inner wiring B1, B2, B3, and B4, and the second inner wiring C1 may be made of the same material as the touch pad 200. [ For example, when the touch pad 200 is a transparent conductive material such as ITO, the outer wiring A1, A2, A3, A4, the first inner wiring B1, B2, B3, B4, And may be formed of the same material. On the other hand, when the outer edge of the touch screen is covered by the bezel, the outer wiring A1, A2, A3, and A4 may be formed of a metal material having low resistance.

However, the form in which the touch pads included in the touch pattern group are connected by the outer wiring A1, A2, A3, A4, the first inner wiring B1, B2, B3, B4 and the second inner wiring C1, And the like can be implemented in various embodiments.

 The touch pad 200 is connected to a touch sensing unit (not shown) to be described later by the outer wiring A1, A2, A3, A4, the first inner wiring B1, B2, B3, B4 and the second inner wiring C1, Lt; / RTI >

Meanwhile, the capacitive touch panel according to an embodiment of the present invention may further include a touch sensing unit (not shown).

The touch sensing unit can sense a touch through a change in capacitance caused when the touch pad 200 is touched. For example, when a driving signal is sequentially supplied to a touch pad connected to the X axis and a touch pad connected to the Y axis sequentially senses the driving signal, The coordinates can be detected.

1B and FIG. 2, each of the first touch pads 7a arranged in the same column in FIG. 1B is connected by wiring, and the bar-shaped second touch pad 7b is connected by a separate wiring, The regions where the wirings overlap each other occur in the region where the wirings are connected.

2, the touch pads connected in the Y-axis direction are also connected to the touch pads arranged in the same column via wiring, but the touch pads arranged in the same column are connected to the adjacent pair of touch pads and the first internal wirings B1 and B2 , B3, B4). In addition, the touch pads connected in the X-axis direction are connected to each other by the second internal wiring C1 to be similar to the second touch pad 7b in Fig. 1B. At this time, the first internal wirings (B1, B2, B3, B4) and the second internal wirings (C1) do not overlap and can be arranged on the same plane.

That is, in the touch pattern group 100 shown in FIG. 2, touch pads are arranged and wirings are connected similarly to the touch panel shown in FIG. 1B. However, in FIG. 1B, regions where the wirings overlap each other occur, whereas in FIG. 2, regions where the wirings overlap do not occur.

Therefore, when the entire touch pad is formed like the touch pattern group 100, the phenomenon that the wirings overlap each other in the wiring region can be remarkably reduced as compared with the structure of Fig. 1B. Simplification in this wiring area can result in reduced thickness of the touch panel and improved process yield.

That is, in the conventional single-layer capacitive touch panel according to the related art, even if the touch pad is disposed on the same surface, a region where the wiring connected to the touch pad overlaps is generated, and a short circuit between the wiring is prevented by using a bridge or a via hole The capacitive touch panel according to the embodiment of the present invention does not overlap the wirings of the touch pads in the touch pattern group. Therefore, bridges, via holes, and the like are required to prevent short- There is no need to form. Therefore, when the touch screen panel is implemented with a plurality of touch pattern groups according to the present embodiment, the number of points to jump between wirings can be greatly reduced.

In the embodiment shown in Fig. 2, the space between the touch pad and the wiring is shown to be very large, but this is exaggerated for easy understanding of the invention. The actual touchpad and wiring will be arranged fairly tightly and will occupy almost all of the display area of the touch screen.

In addition, each of the wirings may be connected to the edge of the touch pad to minimize unnecessary space. This practical configuration can be applied to all of the embodiments of Figs. 3 to 6 to be described later.

3 is a diagram illustrating an example of a touch pattern group of the capacitive touch panel according to another embodiment of the present invention.

The touch pattern group 100 included in the capacitive touch panel according to another embodiment of the present invention may include a plurality of touch pads 200. For example, the touch pattern group 100 may include a touch pad 200 disposed on the same surface.

Here, the touch pad 200 may be formed of a transparent conductive material. For example, the touch pad 200 may be formed of a transparent conductive material such as ITO (Indium Tin Oxide), ATO (Antimony Tin Oxide), CNT (Carbon Nano Tube), IZO (Indium Zinc Oxide)

3, the touch pattern group of the capacitive touch panel according to another embodiment of the present invention is a matrix in which the 3x4 matrix of the touch pattern group shown in FIG. 2 is changed to a 4x3 matrix in the form of rows and columns. 2 is the same as the touch pattern group shown in Fig. That is, the touch pattern group shown in Fig. 3 has a structure similar to that of the touch pattern group shown in Fig. 2 rotated by 90 degrees.

3 includes a structure similar to that of the touch pattern group shown in Fig. 2, so that the content of the touch pattern group shown in Fig. 2 is not limited to that shown in Fig. 3 It is also applied to the touch pattern group.

4 is a view showing an example of a touch pattern group of the electrostatic touch panel according to another embodiment of the present invention.

As shown in FIG. 4, the touch pattern group of the electrostatic touch panel according to another embodiment of the present invention may include a touch pad 200 arranged in a matrix of 4x4 and arranged on the same plane. At this time, the touch pad 200 may be formed of a transparent conductive material. For example, the touch pad 200 may be formed of a transparent conductive material such as ITO (Indium Tin Oxide), ATO (Antimony Tin Oxide), CNT (Carbon Nano Tube), IZO (Indium Zinc Oxide)

Touch pads arranged similarly to the touch pattern group shown in FIG. 2 and touch pads connected to the lower side in the X-axis direction are added. That is, the touch pads connected in the Y-axis direction and the touch pads connected in the X-axis direction in the touch pattern group shown in Fig. 2 are connected to the respective wirings, and some of the touch pads connected in the X- B2, B3, and B4, which are connected by the second internal wiring C2 and do not overlap with the first internal wirings B1, B2, B3, and B4. The touch pads in the X-axis direction connected by the second internal wiring C2 may not be connected by wiring but may be implemented in the form of a rod in the X-axis direction.

The touch pattern group shown in FIG. 4 includes a structure similar to that of the touch pattern group shown in FIG. 2, so that even if omitted below, the contents of the touch pattern group shown in FIG. 2 correspond to the touch pattern group .

5 is a view showing an example of a touch pattern group of the electrostatic touch panel according to another embodiment of the present invention.

The touch pattern group of the electrostatic touch panel according to another embodiment of the present invention may include a touch pad 200 disposed on the same surface as shown in FIG.

The touch pattern group shown in FIG. 5 is an expanded form of the touch pattern group shown in FIG. 2, and some of the touch pads connected in the Y-axis direction include outer wiring lines A1, A2, A3, A4 , A5, A6, A7, and A8 and the remainder may be connected by the first internal wirings B1, B2, B3, B4, B5, B6, B7, B8 in the display area. 5, a part of the touch pads connected in the X-axis direction is connected to the second internal wiring lines B1, B2, B3, B4, B5, B6, B7, B8, (C1).

At this time, the Y-axis direction and the X-axis direction are orthogonal to each other, and the first internal wirings B1, B2, B3, B4, B5, B6, B7, B8 and the second internal wirings C1 are arranged on the same plane . The first internal wirings B1, B2, B3, B4, B5, B6, B7, B8 and the second internal wirings C1 may be made of the same material as the touch pad 200. [

Fig. 5 shows a modified example thereof based on the embodiment shown in Fig. 2, and it is obvious that it can be applied to the embodiment shown in Fig. 3 to Fig.

6 is a diagram illustrating an example of a touch pattern group of the electrostatic touch panel according to another embodiment of the present invention.

Referring to FIG. 6, in the capacitive touch panel according to another embodiment of the present invention, a plurality of touch pattern groups may be arranged in a row or column direction. At this time, a plurality of touch pattern groups may be arranged in various embodiments according to the application in which the electrostatic touch panel is used.

The touch pattern group shown in FIG. 6 is an expanded form of the touch pattern group shown in FIG. 4, and some of the touch pads connected in the Y-axis direction include outer wiring lines A1, A2, A3, A4 And the rest are connected by the first internal wirings B1, B2, B3, B4, B1 ', B2', B3 'and B4' in the display area. At this time, the touch pads arranged in the same column among the touch pads connected in the Y-axis direction are connected to a pair of adjacent touch pads and the first internal wirings B1, B2, B3, B4, B1 ', B2', B3 ' ). ≪ / RTI > For example, the touch pads arranged in the first row first column connected in the Y-axis direction and the touch pads in the third row first column adjacent to each other can be connected by the first internal wiring B1, The touch pad arranged in the row first column and the touch pad in the sixth row first column adjacent to each other can be connected by the first internal wiring B1 '.

The touch pads connected to each other in the Y-axis direction belonging to different touch pattern groups are connected by the outer wires A1, A2, A3, A4, and the touch pads connected to the same touch pattern group in the Y- Can be connected by the wires B1, B2, B3, B4, B1 ', B2', B3 ', B4'.

The first touch pattern group includes the touch pads arranged in the first to fourth rows and the second touch pattern group includes the touch pads arranged in the fifth to eighth rows.

First, since the touch pads arranged in the first row first column connected in the Y-axis direction and the touch pads arranged in the fifth row first column are the first touch pattern group and the second touch pattern group, respectively, And is connected to the touch pad in the Y axis direction by the outer wiring A1. Likewise, the touch pads arranged in the first row second column connected in the Y-axis direction and the touch pads arranged in the fifth row second column may be connected by the outer wiring line A2.

The touch pads arranged in the first row first column and the touch pads arranged in the third row first column, which are connected in the Y-axis direction belonging to the same touch pattern group, may be connected by the first internal wiring B1. Likewise, the touch pads arranged in the fifth row first column and the touch pads arranged in the seventh row first column, which are connected to each other in the Y-axis direction belonging to the same touch pattern group, can be connected by the first internal wiring B1 '.

6, some of the touch pads connected in the X-axis direction do not overlap with the first internal wirings B1, B2, B3, B4, B1 ', B2', B3 'and B4' Are connected by the second internal wirings (C1, C2, C3, C4).

At this time, the first internal wirings B1, B2, B3, B4, B1 ', B2', B3 'and B4' and the second internal wirings C1, C2, C3 and C4 may be arranged on the same plane . The first internal wirings B1, B2, B3, B4, B1 ', B2', B3 'and B4' and the second internal wirings C1, C2, C3 and C4 are made of the same material as the touch pad 200 ≪ / RTI >

In the touch pattern group shown in Fig. 6, which is an extension of Fig. 4, an area where wiring overlaps occurs, but it can be seen that the wiring overlaps much less than the conventional one. Accordingly, there is an advantage that the number of jumps between wirings is required to be smaller than that of the conventional touch panel.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

Claims (7)

1. A capacitive touch panel comprising a plurality of touch pattern groups,
Wherein the touch pattern group includes a plurality of touch pads disposed on a single surface within a display area,
Some of the touch pads connected in the first axis direction are connected by an outer wire outside the display area and the rest are connected by the first inner wire in the display area,
Some of the touch pads connected in the second axial direction are connected by the second internal wiring which does not overlap with the first internal wiring in the display area,
The touch pads connected in the first axis direction belonging to different touch pattern groups are connected by the outer wire,
Wherein the touch pad connected in the first axis direction belonging to the same touch pattern group is connected by a first internal wiring.
delete The method according to claim 1,
Wherein the first axis direction and the second axis direction are orthogonal to each other.
The method according to claim 1,
Wherein the first internal wiring and the second internal wiring are made of the same material as the touch pad.
The method according to claim 1,
Wherein the touchpad is formed of a transparent conductive material.
The method according to claim 1,
Wherein the touch pad further comprises a touch sensing unit for sensing a touch through a change in capacitance caused when the touch occurs.
A personal portable terminal comprising the electrostatic touch panel according to any one of claims 1 to 6.

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