KR101853025B1 - Touch screen panel - Google Patents

Abstract

The present invention provides a touch screen panel capable of reducing a noise component induced in driving electrode lines and sensing electrode lines when a display device is driven, thereby improving a touch performance. A plurality of first electrode rows arranged on the substrate in parallel in a first direction; A plurality of second electrode rows arranged on the substrate in parallel in a second direction intersecting with the first electrode rows; And an insulating layer formed between the first electrode row and the second electrode row so that the first electrode row and the second electrode row are not in contact with each other at an intersection of the first electrode row and the second electrode row, Each of the first electrode rows of the first electrode rows includes a plurality of first electrode patterns and a plurality of first connection patterns connecting the neighboring first electrode patterns, Patterns and a plurality of second connection patterns connecting the neighboring second electrode patterns, wherein the area of the first electrode pattern is larger than the area of the second electrode pattern.

Description

A touch screen panel {TOUCH SCREEN PANEL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch screen panel, and more particularly, to a touch screen panel for a display device capable of reducing noise induced in a touch screen by a driving voltage of the display device.

In recent years, display devices such as liquid crystal displays (LCDs), electroluminescent displays (ELwctroluminescent displays), and plasma display panels have attracted attention because of their high response speed, low power consumption and excellent color recall . Such display devices have been used in a variety of electronic products such as televisions, computer monitors, notebook computers, mobile phones (mobiLw phones), display parts of refrigerators, personal digital assistants, and automated teller machines. Generally, these display devices constitute an interface with a user by using various input devices such as a keyboard, a mouse, and a digitizer.

However, the use of a separate input device such as a keyboard and a mouse has a problem in that it requires the user to learn how to use the device and occupies a space, thereby inconveniencing the user. Therefore, there is a growing demand for an input device that is convenient and simple and can reduce malfunctions. In accordance with such a demand, a touch screen panel has been proposed in which a user directly touches the screen with a hand or a pen to input information.

The touch screen panel is simple, has little malfunction, can be input without using a separate input device, and can be operated quickly and easily through the contents displayed on the screen. .

Hereinafter, a conventional touch screen panel will be described with reference to FIG. 1 is a plan view schematically showing a conventional touch screen panel.

1, a touch screen panel includes a substrate 10, a plurality of driving electrode columns 20 formed in parallel on the substrate 10 in a first direction (e.g., x direction), a substrate 10 And a plurality of sensing electrode rows 30 formed in a second direction (for example, y direction) so as to intersect the plurality of driving electrode rows 20 with an insulating film (not shown) A plurality of first routing wiring lines 40 connected to the plurality of drive electrode lines 20 respectively, a plurality of second routing wiring lines 50 connected to the plurality of sensing electrode lines, And a pad portion 60 to which the first and second routing wirings 40 and 50 are connected.

In the above structure, each of the plurality of driving electrode rows 20 and the plurality of sensing electrode rows 30 is formed by connecting a plurality of hexagonal electrode patterns and is formed on the same plane.

The conventional touch screen panel generally has a structure in which a signal is given to the driving electrode row 20 and a signal is received through the sensing electrode row 30. [ That is, when a finger or the like is touched on the touch screen panel, a signal transmitted to the sensing electrode row 30 is changed, and the touch screen panel can recognize whether the touch is performed by sensing the change. Since such a touch screen panel is generally used in combination with a display device, it is inevitable that noise is generated in the driving electrode row 20 and the sensing electrode row 30 due to the voltage supplied for driving the display device. When noise is generated in the driving electrode row 20 of the touch screen panel, the noise is only detected when the sensing electrode row 30 is transmitted to the sensing electrode row 30, but when noises are directly generated in the sensing electrode row 30 The noise can be sensed at a level similar to that of the touch sensing signal, thereby deteriorating the touch performance.

In addition, since the electrode patterns constituting the driving electrode row 20 and the sensing electrode row 30 of the touch screen panel are generally formed in the same size, there is a problem that it is difficult to reduce the noise due to the driving voltage supplied for driving the display device there was. In addition, when the electrode patterns have a hexagonal shape, there is a problem that the transmission efficiency of the touch signal is very low because the resistance of the connection portion (bridge) connecting the neighboring electrode patterns is increased to increase the resistance.

Accordingly, there is a need for a new touch screen panel capable of solving the problems of the prior art.

It is an object of the present invention to provide a touch screen panel capable of reducing noise components induced in driving electrode lines and sensing electrode lines when a display device is driven to improve touch performance.

According to an aspect of the present invention, there is provided a touch screen panel including: a substrate having an electrode forming portion; A plurality of first electrode rows arranged on the substrate in parallel in a first direction; A plurality of second electrode rows arranged on the substrate in parallel in a second direction intersecting with the first electrode rows; And an insulating layer formed between the first electrode row and the second electrode row so that the first electrode row and the second electrode row are not in contact with each other at an intersection of the first electrode row and the second electrode row, Each of the first electrode rows of the first electrode rows includes a plurality of first electrode patterns and a plurality of first connection patterns connecting the neighboring first electrode patterns, Patterns and a plurality of second connection patterns connecting the neighboring second electrode patterns, wherein the area of the first electrode pattern is larger than the area of the second electrode pattern.

In the above structure, the first electrode pattern has a hexagonal structure, and the second electrode pattern has a rhombic structure.

Also, the area of the first electrode pattern is formed to be 1.7 to 4.0 times larger than the area of the second electrode pattern, and the area of the second electrode row is formed to have a size of 0.1 to 0.4 of the total area of the electrode forming unit.

Further, the first electrode pattern includes a first opening penetrating itself, and the second electrode pattern is formed to include a second opening penetrating through the first electrode pattern.

The first opening is formed to have a range of 40% to 60% of the area of the first electrode pattern, and the second opening is formed to have a range of 40% to 60% of the area of the second electrode pattern.

A first dummy pattern is formed in the first opening, the first dummy pattern is formed to have a size of 0.3 to 0.6 of the first electrode pattern, a second dummy pattern is formed in the second opening, The dummy pattern is formed to have a size of 0.3 to 0.6 of the second electrode pattern.

According to the touch screen panel of the present invention, the area of the electrode pattern of the second electrode row (sensing electrode row) is made smaller than the electrode pattern of the first electrode row (driving electrode row), thereby reducing the noise component directly generated in the sensing electrode row So that the effect of improving the touch performance can be obtained.

The first electrode pattern of the first electrode array is formed in a hexagonal shape and the second electrode pattern of the second electrode array is formed in a diamond shape to form a first connection pattern connecting the neighboring first electrode patterns, The length of the second connection pattern connecting the two-electrode patterns can be reduced. Therefore, since the resistance of the first and second connection patterns can be reduced, an effect of increasing the transmission efficiency of the touch signal can be obtained.

1 is a plan view schematically showing a conventional touch screen panel,
2 is a plan view of a touch screen panel according to an embodiment of the present invention,
3 is a cross-sectional view taken along line I-I 'of FIG. 2,
FIG. 4 is a plan view showing a first electrode row of a touch screen panel according to an embodiment of the present invention shown in FIG. 1,
FIG. 5 is a plan view showing a second electrode row of the touch screen panel according to the embodiment of the present invention shown in FIG. 1,
6A to 6G illustrate various embodiments of a unit touch pixel including first electrode patterns constituting a first electrode line and second electrode patterns constituting a second electrode line according to an embodiment of the present invention Floor plan,
FIG. 7 is a graph illustrating a relationship between a first noise component and a second noise component occurring in the first electrode pattern and the second electrode pattern, respectively, when the area of the electrode pattern constituting the second electrode array is 0.05 to 0.45 of the unit touch pixel area, A graph showing the total noise component as a voltage value,
8 is a graph illustrating an effect of noise improvement of a touch screen panel according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals refer to like elements throughout the specification.

A touch screen panel according to an embodiment of the present invention will be described with reference to FIGS. 2 to 6G. FIG. 2 is a plan view of a touch screen panel according to an embodiment of the present invention, FIG. 3 is a cross-sectional view taken along line I-I 'of FIG. 2, FIG. 5 is a plan view showing a second electrode line of the touch screen panel according to the embodiment of the present invention shown in FIG. 1, and FIGS. 6A to 6G are cross- FIG. 5 is a plan view showing various embodiments of electrode patterns constituting the first and second electrode rows according to the example.

Referring to FIG. 2, the touch screen panel according to the embodiment of the present invention includes an electrode forming portion A, a routing wiring forming portion B, and a pad forming portion C.

2 to 5, the electrode forming portion A includes a plurality of first electrode rows 130 arranged in parallel in a first direction (e.g., x-axis direction) on a substrate 100, And a plurality of second electrode rows 135 arranged in parallel in a second direction (e.g., the y-axis direction) intersecting the first electrode rows 130 on the substrate 100. As shown in FIG. 3, the first electrode row 130 and the second electrode row 135 are formed at intersections of the first electrode row 130 and the second electrode row 135 so that the first electrode row 130 and the second electrode row 135 do not contact each other. An insulating pattern 120 is formed between the first electrode lines 130 and the second electrode lines 135. In the embodiment of the present invention, the driving electrode row of the touch screen panel is referred to as a first electrode row 130, and the sensing electrode row is referred to as a second electrode row 135.

As shown in FIG. 4, each of the first electrode lines 130 includes a plurality of first electrode patterns 131 and a plurality of first connection patterns 131 connecting the adjacent first electrode patterns 131, (132). The first electrode patterns 131 and the first connection patterns 132 are integrally formed and the first electrode patterns 131 have a hexagonal structure and the first connection patterns 132 are connected to the first electrode patterns 131 The first electrode pattern 131 and the second electrode pattern 131 overlap each other.

Each of the second electrode lines 135 includes a plurality of second connection patterns 136 connecting the plurality of second electrode patterns 136 and the adjacent second electrode patterns 136, 137). The second electrode patterns 136 and the second connection patterns 137 are integrally formed and the second electrode patterns 136 have a rhombic structure and the second connection patterns 137 are formed on the second electrode patterns 136 The second electrode pattern 136 is formed in a bar shape extending to a position where two sides of the neighboring second electrode pattern 136 meet. In addition, in the embodiment of the present invention, the total area of the second electrode rows 135 is 0.1 to 0.4 of the total area of the electrode forming portion A.

The first and second electrode patterns 131 and 136 constituting the first electrode row 130 and the second electrode row 135 of the electrode forming portion A and the first and second connection patterns 132 and 132, And 137 are formed of the same material and are formed of a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), or gallium-doped zinc oxide (GZO).

2, the routing wiring forming portion B includes a plurality of first routing wirings 112 (not shown) formed at the outer portion of the electrode forming portion A and connected to the plurality of first electrode lines 130, And a plurality of second routing lines 114 connected to the plurality of second electrode lines 135, respectively. Each of the first and second routing wirings 112 and 114 is formed of a metal material such as Al, AlNd, Mo, MoTi, Cu, or Cr.

The pad forming portion C includes a plurality of first pads 116 connected to the plurality of first electrode lines 130 via the plurality of first routing interconnections 112, And a plurality of second pads 118 connected to the plurality of second electrode lines 135 through the plurality of first electrode lines 114. Each of the first and second pads 116 and 118 is formed of a metal material such as Al, AlNd, Mo, MoTi, Cu, or Cr.

Next, the first and second electrode patterns 131 and 136 according to the embodiment of the present invention will be described in detail with reference to FIGS. 6A to 6G.

6A to 6G illustrate first electrode patterns 131 constituting the first electrode column 130 and second electrode patterns 136 constituting the second electrode column 135 according to the embodiment of the present invention, FIG. 2 is a plan view showing various embodiments of a unit touch pixel made up of a plurality of touch pixels.

Referring to FIG. 6A, the unit touch pixel of the first embodiment includes two first electrode patterns 131, a first connection pattern 132 connecting the first electrode patterns 131 and the second electrode patterns 131, two second electrode patterns 136, The second connection pattern 137 is formed. In the unit pixel of the first embodiment, the area of the hexagonal first electrode pattern 131 is wider than the area of the second electrode pattern 136 of the rhombic shape, and the area of the first electrode pattern 131 is larger than that of the second electrode pattern 136. [ Is formed to be about 1.7 to about 4.0 times larger than the area of the opening (136).

When the area of the first electrode pattern 131 serving as the driving electrode is formed to be larger than the area of the second electrode pattern 136 serving as the sensing electrode, the second electrode pattern 136 is formed by the driving voltage of the display device, It is possible to obtain an effect of improving the touch performance.

The first electrode pattern 131 is formed in a hexagon and the second electrode pattern 136 is formed in a diamond shape to form a first connection pattern 132 connecting adjacent first electrode patterns 131, The length of the second connection pattern 137 connecting the adjacent second electrode patterns 136 can be reduced. Therefore, since the resistance of the first and second connection patterns 132 and 137 can be reduced, an effect of increasing the transmission efficiency of the touch signal can be obtained.

6B, the unit touch pixel of the second embodiment includes two first electrode patterns 131, a first connection pattern 132 connecting the first electrode patterns 131 and the second electrode patterns 131, two second electrode patterns 136, The second connection pattern 137 is formed. In the unit pixel of the second embodiment, the hexagonal first electrode pattern 131 is formed with a first opening H1 that passes through the first electrode pattern 131 itself. Since the area of the first electrode pattern 131 can be further reduced by forming the first opening H1 in the first electrode pattern 131 serving as the driving electrode as described above, It is possible to obtain an effect of reducing the noise component generated in the light emitting element 131.

Referring to FIG. 6C, the unit touch pixel of the third embodiment includes two first electrode patterns 131, a first connection pattern 132 connecting the first electrode patterns 131 and the second electrode patterns 131, two second electrode patterns 136, The second connection pattern 137 is formed. In the unit pixel of the third embodiment, a second opening H2 is formed at the center of the second electrode pattern 136 in a rhombus shape. Since the area of the second electrode pattern 136 can be further reduced by forming the second opening H2 inside the second electrode pattern 136 serving as the sensing electrode as described above, It is possible to obtain an effect of reducing the noise component generated in the electrode pattern 136. [

Referring to FIG. 6D, the unit touch pixel of the fourth embodiment includes two first electrode patterns 131, a first connection pattern 132 connecting the first electrode patterns 131 and the second electrode patterns 131, two second electrode patterns 136, The second connection pattern 137 is formed. In the unit pixel of the fourth embodiment, the hexagonal first electrode pattern 131 is formed with a first opening H1 that passes through the first electrode pattern 131, and the second electrode pattern 136, which has a rhombic shape, (H2) is formed. In this manner, the first opening H1 passing through the first electrode pattern serving as the driving electrode is formed, and the second electrode pattern 136 serving as the sensing electrode is provided with the second opening H2 The area of the first and second electrode patterns 131 and 136 can be further reduced. Therefore, the noise components generated in the first and second electrode patterns 131 and 136 by the driving voltage of the display device A reduction effect can be obtained.

Referring to FIG. 6E, the unit touch pixel of the fifth embodiment has a structure in which a first dummy pattern D1 is formed in the first opening H1 of the first electrode pattern 131 of the unit touch pixel of FIG. 6B. The first dummy pattern D1 has a size of 0.3 to 0.6 of the first electrode pattern 131. By forming the first dummy pattern D1 in the first opening H1 as described above, it is possible to prevent the appearance of a stain generated due to the difference in height between the portion where the first opening H1 is formed and the peripheral portion, So that an effect of improving the visibility can be obtained.

Referring to FIG. 6F, the unit touch pixel of the sixth embodiment has a structure in which a second dummy pattern D2 is formed in the second opening H2 of the second electrode pattern 136 of the unit touch pixel of FIG. 6C. The second dummy pattern D2 is formed to have a size of 0.3 to 0.6 of the second electrode pattern 136. By forming the second dummy pattern D2 in the second opening H2 as described above, it is possible to prevent the appearance of a stain shape due to the difference in height between the portion where the second opening H2 is formed and the peripheral portion, So that an effect of improving the visibility can be obtained.

Referring to FIG. 6G, the unit touch pixel of the seventh embodiment forms a first dummy pattern D1 in the first opening H1 of the first electrode pattern 131 of the unit touch pixel of FIG. 6D, And a second dummy pattern D2 is formed in the second opening H2 of the pattern 136. [ The first dummy pattern D 1 is formed to have a size of 0.3 to 0.6 of the first electrode pattern 131 and the second dummy pattern D 2 has a size of 0.3 to 0.6 of the second electrode pattern 136. By forming the first dummy pattern D1 and the second dummy pattern D2 in the first opening H1 and the second opening H2 as described above, the first opening H1 and the second opening H2 are formed It is possible to prevent the appearance of a stain shape caused by the difference in height between the formed portion and the peripheral portion and the difference in the material, so that the effect of improving the visibility can be obtained.

Next, the effect of the touch screen panel according to the second embodiment of the present invention will be described with reference to FIGS. 7 and 8. FIG.

7 is a graph illustrating a relationship between a first noise component generated in each of the first electrode pattern 131 and the second electrode pattern 136 and a second noise component occurring in the second electrode pattern 136 when the area of the second electrode pattern 136 is 0.05 to 0.45, Is a graph showing the noise component and the total noise component as a voltage value (Volt). From FIG. 7, it can be seen that the first noise component decreases as the area of the second electrode pattern increases, but the second noise component increases in proportion as the area of the second electrode pattern increases. Also, the total noise component of the second electrode pattern 136 decreases in the range of 0.05 to 0.20 of the unit touch pixel area, but increases gradually in the range of 0.20 to 0.45, but does not increase greatly.

8 is a graph illustrating an effect of noise improvement of a touch screen panel according to an embodiment of the present invention. 8, the noise component transmitted to the second electrode pattern 136 serving as the sensing electrode due to the noise component generated in the first electrode pattern 131 serving as the driving electrode is increased as compared with the prior art. However, The noise component directly generated in the second electrode pattern 136 is remarkably reduced compared to the conventional one, and as a result, the total noise component is reduced.

A touch screen panel according to an exemplary embodiment of the present invention includes a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), an electroluminescent display device Electroluminescence Device, EL), an electrophoretic display device, and the like.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

100: substrate 112: first routing wiring
114: second routing wiring 116: first pad
118: second pad 120: insulating layer
130: first electrode row 131: first electrode pattern
135: second electrode row 136: second electrode pattern
137: second connection pattern A: electrode forming portion
B: routing wiring forming portion C: pad forming portion
D1, D2: dummy pattern H1, H2:

Claims (9)

A substrate having an electrode forming portion;
A plurality of first electrode rows arranged on the substrate in parallel in a first direction;
A plurality of second electrode rows arranged on the substrate in parallel in a second direction intersecting with the first electrode rows; And
And an insulating layer formed between the first electrode row and the second electrode row so that the first electrode row and the second electrode row are not in contact with each other at an intersection of the first electrode row and the second electrode row,
Wherein each of the plurality of first electrode columns includes a plurality of first electrode patterns and a plurality of first connection patterns connecting adjacent first electrode patterns,
Wherein each of the second electrode rows includes a plurality of second electrode patterns and a plurality of second connection patterns connecting the neighboring second electrode patterns,
Wherein the insulating layer includes a plurality of insulating patterns disposed between the plurality of first connection patterns and the plurality of second electrode patterns,
The plurality of first electrode patterns constituting each of the plurality of first electrode columns and the plurality of first connection patterns are integrally formed,
The plurality of second electrode patterns and the plurality of second connection patterns constituting each of the plurality of second electrode columns are integrally formed,
Each of the plurality of first electrode patterns includes a first opening penetrating the first electrode pattern so that a dummy pattern is not disposed between the first electrode pattern and the second electrode pattern adjacent thereto,
Wherein the area of the first electrode pattern is larger than the area of the second electrode pattern.
The method according to claim 1,
Wherein the first electrode pattern has a hexagonal structure and the second electrode pattern has a diamond-like structure.
3. The method of claim 2,
Wherein the area of the first electrode pattern is formed to be 1.7 times to 4.0 times larger than the area of the second electrode pattern.
3. The method of claim 2,
And the area of the second electrode row is formed to have a size of 0.1 to 0.4 of the total area of the electrode formation unit.
3. The method of claim 2,
Wherein the second electrode pattern comprises a second opening through which the second electrode pattern passes.
6. The method of claim 5,
Wherein the first opening is formed to have a range of 0.4 to 0.6 of the first electrode pattern area and the second opening is formed to have a range of 0.4 to 0.6 of the second electrode pattern area. .
6. The method of claim 5,
Wherein a first dummy pattern is formed in the first opening portion and a second dummy pattern is formed in the second opening portion.
8. The method of claim 7,
Wherein the first dummy pattern is formed to have a size of 0.3 to 0.6 of the first electrode pattern and the second dummy pattern has a size of 0.3 to 0.6 of the second electrode pattern.
3. The method of claim 2,
Wherein the first and second electrode patterns, the first connection pattern, and the first and second dummy patterns are formed of the same material and include one of ITO, IZO, and GZO.

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