KR20110065260A - Touch panel and liquid crystal display device including touch panel - Google Patents

Abstract

PURPOSE: A touch panel and a liquid crystal display integrated with a touch panel are provided to prevent an RC delay due to an increase of a resistance. CONSTITUTION: A plurality of first sensors include first transparent electrodes and first bridge electrodes(120). The first sensors are arranged in a second direction. A plurality of second sensors include second electrodes(110) and second bridge electrodes(105). The second sensors are arranged in a first direction. Metal patterns(130,135) are overlapped with the first bridge electrodes.

Description

Touch Panel and Touch Panel Integrated Liquid Crystal Display {Touch Panel and Liquid Crystal Display Device including Touch Panel}

The present invention relates to a touch panel, and in particular, when a capacitive touch panel is provided, a touch panel having reduced resistance at a portion where each electrode crosses, preventing a signal delay and a sensing delay caused by the resistance, thereby improving touch sensitivity. And a touch panel integrated liquid crystal display device.

In recent years, the display field for visually expressing electrical information signals has been rapidly developed as the information age has been developed, and various flat panel display devices having excellent performance of thinning, light weight, and low power consumption have been developed. Flat Display Device has been developed and is rapidly replacing the existing Cathode Ray Tube (CRT).

Specific examples of such a flat panel display include a liquid crystal display device (LCD), a plasma display panel device (PDP), a field emission display device (FED), and an electroluminescent display device. (Electro luminescence Display Device: ELD) and the like, these are commonly used as an essential component of a flat panel display panel that implements an image, a flat panel display panel has a pair of light emitting or polarizing material layer in between It has a configuration in which a transparent insulating substrate is faced and bonded together.

The dual liquid crystal display displays an image by adjusting the light transmittance of the liquid crystal using an electric field. To this end, the image display device includes a display panel having a liquid crystal cell, a backlight unit for irradiating light to the display panel, and a driving circuit for driving the liquid crystal cell.

The display panel is formed such that a plurality of unit pixel regions are defined by crossing a plurality of gate lines and a plurality of data lines. In this case, each pixel area includes a thin film transistor array substrate and a color filter array substrate facing each other, a spacer positioned to maintain a constant cell gap between the two substrates, and a liquid crystal filled in the cell gap.

The thin film transistor array substrate includes a gate line and a data line, a thin film transistor formed of a switch element at each intersection of the gate lines and the data lines, a pixel electrode formed of a liquid crystal cell and connected to the thin film transistor, and the like. It consists of the applied alignment film. The gate lines and the data lines receive signals from the driving circuits through the respective pad parts.

The thin film transistor supplies the pixel voltage signal supplied to the data line to the pixel electrode in response to the scan signal supplied to the gate line.

The color filter array substrate includes color filters formed in units of liquid crystal cells, a black matrix for distinguishing between color filters and reflecting external light, a common electrode for supplying a reference voltage to the liquid crystal cells in common, and an alignment layer applied thereon. It consists of.

The thin film transistor substrate and the color filter array substrate manufactured separately are aligned and then bonded to each other, and then the liquid crystal is injected and encapsulated.

As described above, there is an increasing demand for a liquid crystal display device having a touch panel capable of recognizing a touch portion through a hand of a person or a separate input means and transmitting separate information corresponding thereto. Currently, such a touch panel is applied in the form of attaching to an outer surface of a liquid crystal display.

In addition, the touch sensing method is divided into a resistive method, a capacitive method, and an infrared sensing prevention method. In view of the convenience and sensing force of the manufacturing method, the capacitive method has recently attracted attention.

Hereinafter, a conventional capacitive touch panel will be described with reference to the accompanying drawings.

1 is a plan view illustrating an electrode intersection of a conventional touch panel, and FIG. 2 is a structural cross-sectional view taken along line II ′ of FIG. 1.

1 and 2, the conventional capacitive touch panel includes a first electrode 13 and a second electrode 14 formed in different directions on the substrate 10.

Here, the second electrode 14 is formed by connecting patterns of diamonds (diamond shapes) having a smaller width to each other in the longitudinal direction, and the first electrode 13 is connected to the second electrode 14. At the intersection of the is formed separated from each other. The patterns and connection portions of the lozenges in the second electrode 14 are integrated, and the first electrode 13 is formed by separating the lozenge patterns from each other.

In this case, an insulating film 12 is formed below the first electrode 13 and the second electrode 14, and is connected to the substrate 10 corresponding to the separated first electrodes 13. A first electrode, in which the metal 11 is further formed, in which the connection metal 11 and the first electrode 13 are electrically contacted and separated from each other in the contact hole 12a partially exposing the connection metal 11. The common signal may be applied to 13).

The first and second electrodes 13 and 14 are transparent electrodes.

In this case, the second electrode 14 is rhombic except for the connecting portion, and in fact, the width of the connecting portion connecting the lozenges of the second electrode 14 is very small, and the resistance value at the connecting portion is very large.

Relatively, the first electrode 13 has a large difference in resistance due to the difference in the material and the structural difference between the connection part of the first electrode 13 and the connection part of the second electrode 14 with the connecting metal 11 as a metal component. This results in the fact that the actual panel has an electrode including a plurality of such connection parts, which reduces the effective driving voltage due to the RC delay and consequently makes the touch insensitive so that the sensing sensitivity is lowered. You can. In particular, at the connection of the second electrode 14, the resistance occupies 20% or more of the resistance of one lozenge pattern, and the resistance value is larger than its area.

In addition, the connecting portion of the second electrode 14, which structurally exhibits a high resistance value of the transparent electrode component, is susceptible to damage in an electrostatic test, and may cause short or non-renewable damage, in which case the use of a panel This difficult case also occurs.

The conventional touch panel as described above has the following problems.

In the first electrode and the second electrode formed to cross each other, one of them is long connected in one direction, the other is formed spaced apart from each connecting portion, it is provided with a second bridge electrode under the connection.

In this case, the first and second electrodes are transparent electrode components, and the electrodes formed long in one direction have very small widths at the connecting portions, and have very large resistance values.

Due to the large resistance, the RC delay of the electrodes causes the sensing sensitivity to decrease, and the effective driving voltage decreases due to the RC delay, thereby preventing the touch sensing from being sensitive.

In addition, the connection part of the electrode structurally showing the high resistance value of the transparent electrode component is likely to be damaged by an electrostatic test, and may cause short or unrenewable damage, in which case the use of the panel is difficult. .

The present invention has been made to solve the above problems, when provided with a capacitive touch panel, by reducing the resistance at the cross portion of each electrode, to prevent the signal delay and sensing delay caused by the resistance to increase the touch sensitivity There is an object to provide an improved touch panel and a touch panel integrated liquid crystal display device.

The touch panel of the present invention for achieving the above object consists of a plurality of transparent first electrodes spaced apart in a first direction on the substrate, and a first bridge electrode for integrally connecting the adjacent first electrodes, A plurality of first sensors arranged in a second direction crossing the first direction; a plurality of transparent second electrodes spaced apart from each other on the substrate in the second direction, and a metal connecting the adjacent second electrodes; A plurality of second sensors arranged in the first direction, the second bridge electrodes being arranged in the first direction; And a metal pattern connected to the first bridge electrode in a superimposed manner.

The metal pattern is formed of the same material on the same layer as the second bridge electrode. In this case, an insulating film may be further included between the first sensor and the second electrode and the layer of the second bridge electrode. In addition, corresponding to both ends of the second bridge electrode, the second bridge electrode and the second electrode may be connected to the insulating layer by providing a first contact portion.

The second bridge electrode may be formed in the second direction, and the metal pattern may be spaced apart from each other with the second bridge electrode interposed therebetween, and each of the first and second metal patterns may be formed in the first direction. Can be. Corresponding to both ends of the first and second metal patterns, a second contact portion is provided on the insulating film to connect the first and second metal patterns to the first bridge electrode.

The first metal pattern and the second metal pattern may be divided into a plurality.

In another example, the metal pattern may be formed on a layer different from the second bridge electrode, and the metal pattern may be formed on the first bridge electrode by directly contacting the first bridge electrode without interposing an insulating layer. have. In this case, an insulating film is further included between the first sensor and the second electrode and the layer of the second bridge electrode, and the insulating film has a first contact portion corresponding to both ends of the second bridge electrode.

The second bridge electrode and the metal pattern may include at least one of molybdenum (Mo), copper (Cu), silver (Ag), chromium (Cr), aluminum (Al), aluminum neodium (AlNd), and molybdenum titanium (MoTi). It may be a laminate including any one metal or the at least one metal. As a preferred example, the second bridge electrode and the metal pattern may be formed by sequentially stacking a chromium film and a chromium oxide film.

The apparatus may further include a routing wire connecting one side of the pad electrode, the pad electrode, and ends of the first sensor and the second sensor to one side of the substrate, wherein the second bridge electrode, the metal pattern, and the pad electrode are provided. And the routing wiring may be formed of the same metal on the same layer.

Here, the width of the metal pattern is 3 ~ 20㎛, the width of the first bridge electrode is wider than the metal pattern, it is 10㎛ to 500㎛.

In addition, the touch panel of the present invention for achieving the same object, a substrate; an insulating film formed on the substrate; a plurality of first electrodes spaced apart on the insulating film in a first direction, and the adjacent first A plurality of first sensors disposed in a second direction intersecting the first direction, the first sensor including an integral first bridge electrode connecting the first electrodes; and a plurality of transparent electrodes formed in the second direction on the insulating film. A plurality of second sensors disposed in the first direction, including two spaced apart second electrodes and a second bridge electrode made of a metal connecting the adjacent second electrodes on the substrate; A metal pattern formed to overlap the first bridge electrode; And a first contact portion formed at the insulating film and connecting both ends of the second bridge electrode and the adjacent second electrodes, and a second contact portion connecting both ends of the metal pattern and the first bridge electrode. There is a characteristic.

The liquid crystal display including the touch panel and the touch panel of the present invention as described above has the following effects.

First, in the capacitive touch panel in which the diamond patterns are arranged in the form of electrodes intersecting with each other, one sensor is formed of diamond-shaped electrodes and a bridge electrode connecting the same as an integrated transparent electrode, and the other sensor is a diamond. After forming the electrodes of the type spaced apart, using the metal bridge electrode in the other layer to be electrically connected to the electrodes of other adjacent sensors. In this case, a metal pattern is further provided below the bridge electrode of the transparent electrode component, and the metal pattern and the bridge electrode are contacted to lower the resistance value generated at the bridge electrode, thereby primarily reducing the RC delay due to the increase in resistance. prevent. Through this, the sensing speed of each electrode can be made uniform, thereby improving the sensing sensitivity and the touch sensitivity.

Second, when the lengths of the sensors are different, the resistance difference between the sensors is minimized by adjusting the length and width of the metal pattern at the lower side of the sensor with the higher resistance, so that the level of sensing sensitivity between the sensors is similar. It is possible to improve the accuracy of touch detection.

Third, when the metal pattern is provided, the resistance of the bridge electrode portion of the transparent electrode component may be substantially reduced by the metal component having a specific resistance of 1/20 or less relative to the transparent electrode.

Fourth, chromium having a high absorption of external light or a laminate including the same includes the metal bridge electrode and the metal pattern, thereby preventing the surface from shining by externally reflected light, thereby improving visibility.

Fifth, it is possible to prevent the bridge electrode of the transparent electrode component from being damaged in the electrostatic test by reducing the resistance value at the transparent electrode connection portion between the diamond patterns.

Sixth, ultimately by reducing the total resistance value of the electrodes, by minimizing the resistance difference in the connection portion to minimize the sensing delay caused by the resistance, it is possible to apply the capacitive method in a large area.

1 is a plan view showing an electrode intersection of a conventional touch panel
2 is a structural cross-sectional view taken along line II ′ of FIG. 1.
3A is a plan view illustrating electrode intersections of a touch panel according to a first exemplary embodiment of the present invention.
3B and 3C are structural cross-sectional views taken along lines II-II 'and III-III' of FIG. 3A.
4 is a plan view illustrating electrode intersections of a touch panel according to a second exemplary embodiment of the present invention.
5 is a plan view illustrating electrode intersections of a touch panel according to a third exemplary embodiment of the present invention.
6A to 6C are process plan views illustrating a method of manufacturing a touch panel of the present invention.
7A to 7C are cross-sectional views corresponding to FIGS. 6A to 6C, respectively.
8 is a cross-sectional view showing a modification of the electrode of the touch panel of the present invention.
9 is a plan view illustrating electrode intersections of a touch panel according to a fourth exemplary embodiment of the present invention.
FIG. 10 is an enlarged view of the electrode intersection of FIG. 9; FIG.

Hereinafter, a liquid crystal display including a touch panel and a touch panel of the present invention will be described in detail with reference to the accompanying drawings.

3A is a plan view illustrating electrode intersections of a touch panel according to a first exemplary embodiment of the present invention, and FIGS. 3B and 3C are cross-sectional views taken along lines II to II 'and III to III' of FIG. 3A.

3A to 3C, the touch panel according to the first embodiment of the present invention includes a first sensor (see 1200 of FIG. 6C) and a second sensor (FIG. 6C) formed on the substrate 100 in a large, intersecting direction. 1c of FIG. 6c), and further includes metal patterns 130 and 135 of a metal component for reducing resistance in the bridge (channel) portion of the first sensor 1200. 6A to 6C and 3A, the first direction is the Y-axis direction, the second direction is the X-axis direction, and in some cases, may be the opposite direction.

The first sensor 1200 may be formed on the insulating layer 106 formed on the substrate 100, in a first direction, with a plurality of first electrodes of a diamond pattern spaced apart from each other (see 125 of FIG. 6C). The first bridge electrode 120 connecting the adjacent first electrodes is integrally formed as a transparent electrode.

The second sensor 1100 is a transparent second electrode having a plurality of spaced apart diamond patterns formed in regions in which the first electrode 125 is not formed in the second direction on the insulating layer 106. And a second bridge electrode 105 of metal connecting the adjacent second electrodes 110.

Here, the first bridge electrode 120 is a transparent electrode, the second bridge electrode 105 is formed of a different metal layer formed on different layers, each of the adjacent first or second electrodes It is provided to connect with.

However, since the transparent electrode component has a relative resistivity of 20 times or more relative to that of the metal, a resistance difference occurs in the first and second bridge electrodes 120 and 105 according to the component. That is, the first bridge electrode 120 of the transparent electrode component has a relatively high resistance. In order to reduce the resistance of the first bridge electrode 120, first and second metal patterns 130 and 135 are formed on the same layer as the second bridge electrode 105.

The first and second metal patterns 130 and 135 are formed to correspond to the adjacent first bridge electrodes 120. The first and second metal patterns 130 and 135 may be formed of transparent electrodes having high resistance values. The resistance is reduced to have a resistance value similar to that of the metal second bridge electrode 105 connecting the second electrodes 110 spaced from each other. In addition, the resistance of the larger resistance is induced to compensate for the RC delay difference between the first sensor 1200 and the second sensor 1100.

Here, the first electrodes 125, the first bridge electrode 120, and the second electrode 110 of the second sensor 1100 constituting the first sensor 1200 are transparent electrode components.

The first and second sensors 1200, the first and second metal patterns 130 and 135 and the second bridge electrode 105 formed on different layers from the second electrodes 110 may contact the insulating layer 106. Provide holes to make connections. That is, the first contact hole 107 exposing both ends of the second bridge electrode 105 is exposed in the insulating layer 106, so that the second electrodes 110 adjacent to the second bridge electrode 105 are provided. The second contact holes 132 and 137 exposing both ends of the first and second metal patterns 130 and 135 to the insulating layer 106. The first bridge electrode 120 overlapping the patterns 130 and 135 is connected.

In this case, the first and second metal patterns 130 and 135 are positioned on the same layer as the second bridge electrode 105, and thus, the second bridge electrode 105 is disposed in the first direction. The first metal pattern 130 and the second metal pattern 135 spaced apart therebetween are separated from each other.

In this case, the second contact holes 132 and 137 may be formed at both ends of the first metal pattern 130 and the second metal pattern 135. In some cases, contact holes may be provided at only one end of each of the first metal pattern 130 and the second metal pattern 135, not at both ends thereof.

In this case, the second bridge electrode 105 and the first and second metal patterns 130 and 135 may include molybdenum (Mo), copper (Cu), silver (Ag), chromium (Cr), aluminum (Al), It may be a laminate including at least one metal of aluminum neodium (AlNd) and molybdenum titanium (MoTi) or at least one metal.

The metal component has a relatively low resistivity of 1/20 times or less than that of the first bridge electrode 120 of the transparent electrode component, so that the first bridge electrode 120 has a smaller area than the first electrode 125. Therefore, the resistance value can be reduced considerably.

In addition, as a preferable example, the second bridge electrode 105 and the first and second metal patterns 130 and 135 may be formed by stacking a chromium (Cr) film and a chromium oxide film (CrOx) in a double layer. This is because the chromium component has a good absorption rate of light, thereby preventing reflection of external light and thus preventing shinyness of the metal surface, thereby preventing the user from seeing the pattern of the metal component.

Here, the widths of the first and second metal patterns 130 and 135 are 3 to 20 μm, respectively, and the width of the first bridge electrode 125 is wider than the width of the metal patterns 130 and 135. , 10 µm to 500 µm.

In this case, the lower limit of 3 μm of the first and second metal patterns 130 and 135 is a level that the resolution allows, and may be formed to have a smaller width when the technology is improved and the resolution is improved. In addition, the upper limit of 20 μm is the maximum width that will not be viewed, and it is preferable that both the metal patterns 130 and 135 and the second bridge electrode 105 are formed smaller than 20 μm. In some cases, the width of the first and second metal patterns 130 and 135 may be determined in a range where the resistance may be reduced in consideration of the resistance of the first bridge electrode 120.

Here, the first sensor 1200 and the second sensor 1100 may be positioned in the Y-axis direction, the X-axis direction as shown, or vice versa. These first and second electrodes 125 and 110 and the first bridge electrode 120 are made of a transparent electrode, and the first sensor formed by integrating a transparent electrode on the shorter electrode length in the Y-axis direction or the X-axis direction. It is preferable to apply a from the viewpoint of lowering the resistance.

Meanwhile, the first embodiment described above shows an example in which the first and second metal patterns 130 and 135 and the second bridge electrode 105 are formed on the same layer, but the first and second metal patterns ( 130 and 135 and the second bridge electrode 105 may be formed in different layers. In this case, one of the first and second metal patterns 130 and 135 and the second bridge electrode 105 formed in another layer does not have an insulating film therebetween, and directly the second electrode 110 or the first bridge electrode. Connection with 120 may be made. That is, the first and second metal patterns 130 and 135 may be directly overlapped and formed on the first bridge electrode 120 and the first electrode 110, respectively.

4 is a plan view illustrating electrode intersections of a touch panel according to a second exemplary embodiment of the present invention.

As shown in FIG. 4, the touch panel according to the second embodiment of the present invention is divided into the first metal patterns 231 and 232 and the second metal patterns 234 and 235 as compared with the first embodiment described above. A third contact portion 233 and a fourth formed of two deep metals and connecting the corresponding metal patterns to both ends of the divided first metal patterns 231 and 232 and the second metal patterns 234 and 235, respectively. The difference is that the contact portion 236 is formed.

Here, the shape of the first electrode (not shown) and the second electrode 210, the configuration of the first bridge electrode 220 and the second bridge electrode 205, and the second bridge electrode 205 The configuration of the first contact hole 207 of the second electrode 210 is the same as the first embodiment described above.

In this second embodiment, the electrical contact is strengthened by providing a plurality of metal patterns 231, 232/234, and 235 divided below each other in the lower portion of the first bridge electrode 220 as compared with the first embodiment described above. By reducing the resistance can be induced, thereby the sensing delay prevention effect can be greater.

Here, the third contact portion 233 or the fourth contact portion 236 may be defined as one by connecting end portions of the plurality of metal patterns, respectively, between each metal pattern and the first electrode thereon. The insulating film may be formed by providing contact holes for each metal pattern.

5 is a plan view illustrating electrode intersections of a touch panel according to a third exemplary embodiment of the present invention.

As shown in FIG. 5, the touch panel according to the third embodiment of the present invention includes a first bridge electrode 315 connecting the first electrode 310 of the diamond pattern and the adjacent first electrode 310 in a thin width. A first sensor 1200 provided therein, a second electrode 320 divided in a direction crossing the first sensor 1200, and a second bridge electrode 330 connecting the adjacent second electrodes 320. Pass in a direction intersecting the second sensor 1100 including the second sensor 1100, the contact portion 335 between the second bridge electrode 330 and the second electrode 320, and the second bridge electrode 330. It includes a metal pattern 340.

Here, both ends of the metal pattern 340 have electrical connections through the first electrode 310 and the contact hole 341, respectively. Compared with the above-described first embodiment, the metal pattern 340 is not divided into one, and the metal pattern 340 is formed on a different layer from the second bridge electrode 330 to form the metal pattern. The difference is that it has an intersection with 340.

In addition, the metal pattern 340 is longer than the first and second embodiments so as to pass through the first bridge electrode 315 and pass through the first electrode 310 located above and below. This is a way to reduce the resistance by making the length as long as possible so that it is not visible to the eye.

In this case, since the metal pattern 340 and the second bridge electrode 330 have intersections, the metal patterns 340 and the second bridge electrodes 330 are formed on different layers, and thus, different masks may be required. In this case, the metal pattern 340 may directly contact the first electrode 310 without interposing an insulating layer, or the second bridge electrode 330 may be in contact with the first electrodes 320. Can be contacted. In the former case, when formed of molybdenum or molybdenum alloy on the first electrode 310, a contact process between the separate metal pattern 340 and the first electrode 310 may not be required.

Meanwhile, the metal pattern 340 may be formed on a layer different from the second bridge electrode 330. In this case, the metal pattern 340 is directly contacted on the first electrode 310 and formed of a metal material of molybdenum or molybdenum alloy. can do.

In addition, the interval between the first electrode 310 and the second electrode 320 is preferably 10 ~ 30㎛.

Hereinafter, a manufacturing method of the touch panel of the present invention will be described with reference to the drawings.

6A to 6C are process plan views illustrating a method of manufacturing a touch panel of the present invention, and FIGS. 7A to 7C are process cross-sectional views corresponding to FIGS. 6A to 6C, respectively.

Here, the substrate 100 is defined as diamond patterns for which sensing is performed, and a plurality of formation regions of the first electrode and the second electrode for sensing are defined. Here, the first electrode formation region and the second electrode formation region are defined at different portions crossing each other. The intersection of the first and second electrode forming regions is defined as a channel portion (bridge electrode forming portion). In addition, the substrate 100 largely includes an active region of a central portion in which the electrode formations are defined, and a non-display region of an outer portion of the substrate 100. Here, the non-display area includes a pad area on one side.

First, as shown in FIGS. 6A and 7A, a metal material is deposited on the substrate 100, and selectively removed, and the first metal pattern 130 spaced apart from each other in a first direction corresponding to the channel part. And a second metal pattern 135 are formed, and a second bridge electrode 105 is formed between the first and second metal patterns 130 and 135 in a second direction crossing the first direction.

In this case, the pad region of the substrate 100 is defined as a FPC pad connection portion, and a plurality of pad electrodes 146 are formed, and the second metal pattern 135 and the second metal pattern 135 positioned at each edge of the substrate 100 are formed. Routing wires 145 are simultaneously formed between the bridge electrode 105 and the FPC pad connection portion.

The metal material may include at least one of molybdenum (Mo), copper (Cu), silver (Ag), chromium (Cr), aluminum (Al), aluminum neodium (AlNd), and molybdenum titanium (MoTi). Using a laminate comprising the at least one metal, it is formed to a thickness of about 2000 ~ 3500 ~.

6B and 7B, on the substrate 100 including the first and second metal patterns 130 and 135, the second bridge electrode 105, the routing wire 145, and the pad electrode 146. The insulating film 106 is deposited on the insulating film 106, and the insulating film 106 is selectively removed to form first contact holes 107 and the first and second metal patterns 130 at both ends of the second bridge electrode 105. And a third contact hole 147a and a pad electrode open hole 147b defining a second contact hole (refer to 132 and 137 of FIG. 3C) and a connection portion of the routing wire 145 at each of both ends of the 135. do.

The insulating film 106 is formed of, for example, an inorganic film of a nitride film (SiNx), an oxide film (SiOx), or a nitride oxide film (SiNxOy), or an organic film of a resin component of a thin film. It is formed to the thickness of. In some cases, an insulating film having a sufficient thickness of 1 to 2 µm may be formed of an organic film such as photoacrylic.

6C and 7C, a front surface including the first contact hole 107, the second contact hole (see 132 and 137 of FIG. 3A), the third contact hole 147a, and the pad electrode open hole 147b is provided. After depositing the transparent electrode, patterning is performed to form a first electrode 125 and a second electrode 110 in a second direction crossing the first electrode 125 in a first direction, respectively, in the electrode regions, and the adjacent first electrode. A first bridge electrode 120 connecting the 125 is formed. At the same time, the routing lines include the first electrodes 120 positioned at one end of the adjacent first sensor 1200 and the second electrodes 110 positioned at one end of the second sensor 110. The routing contact electrode 148 connected to the third contact hole 147a and the pad electrode terminal 149 formed on the pad electrodes 146 are formed so as to be connected to the ends of each of the plurality of contact holes 147a.

Here, the first bridge electrode 120 is formed to pass through the first metal pattern 130, the second bridge electrode 105, and the second metal pattern 135 in the first direction.

In addition, the transparent electrode is formed of, for example, ITO, IZO or ITZO, and has a thickness of about 100 to 700 kPa and 1000 to 2000 kPa.

Here, the configuration of the pad unit is divided into two regions so as to be driven into two divided regions when the substrate 100 is driven in two, and in this case, different in each divided region of the pad portion. The driving chip may correspond.

In some cases, the substrate 100 may be formed in one region, and the substrate 100 may be extended to this region and dividedly driven. The division of the pad area may be determined according to the number of pins of the chip to be used.

By the above-described manufacturing method, it is possible to confirm that the touch panel of the present invention can be formed with at least three masks without increasing the number of layers and masks as compared with the conventional structure.

In some cases, as in the third embodiment of FIG. 5 described above, when the metal pattern is formed as a separate layer from the second bridge electrode, the number of masks may be further increased.

8 is a cross-sectional view showing a modification of the electrode of the touch panel of the present invention.

FIG. 8 illustrates an example in which the second bridge electrode 505 and the metal pattern (not shown) are formed by sequentially stacking the chromium film 501a and the chromium oxide film 501b from below.

In this case, as shown, the routing line 545 and the pad electrode 546 formed on the same layer as the second bridge electrode 505 may also have the same stacked structure.

In this way, the second bridge electrode 505 and the metal pattern formed of the metal component including the chromium component, the chromium component has a good absorption of external light, the sparkling due to the reflection of external light that may occur on the metal surface This is because it is possible to prevent the metal pattern from being recognized by the user.

The laminated structure of the chromium film 501a and the chromium oxide film 501b also has the following effects. For example, when the chromium film 501a is present, it reflects about 50% of the ambient light, but the chromium oxide film 501b has a reflectance of about 4%, similar to the black matrix level. Therefore, compared with other metals, the effect which can prevent the visibility of the metal electrode component by reflection of external light is large. In order to solve the visibility caused by external light using another metal, a method of reducing the reflectance may be possible by depositing a thick insulating film component.

In addition, the specific resistance of chromium itself is higher than that of other metals such as aluminum and molybdenum, but even lower than 1/20 of the transparent electrode. In this case, the design can be performed without increasing the wiring resistance.

In the area where the contact between the bridge pattern, the routing wires, the pad electrode and the transparent electrode component is required, in the chromium / chromium oxide layered structure, the side contact is used to directly contact the underlying chromium film in order to lower the contact resistance. Will be more advantageous.

 The metal material may be at least one metal of molybdenum (Mo), copper (Cu), silver (Ag), chromium (Cr), aluminum (Al), aluminum neodium (AlNd), and molybdenum titanium (MoTi) or at least any of the above. Using a laminate comprising a single metal, it is formed to a thickness of about 2000 ~ 3500Å.

9 is a plan view illustrating electrode intersections of a touch panel according to a fourth exemplary embodiment of the present invention, and FIG. 10 is an enlarged view illustrating electrode intersections of FIG. 9.

9 and 10, the touch panel according to the fourth exemplary embodiment of the present invention has a first direction in the X-axis direction and a second direction in the Y-axis direction unlike the above-described embodiments. That is, the first sensor 1200 includes a first electrode 410 in a first direction and a first bridge electrode 407 connecting the adjacent first electrodes 410 as an integrated transparent electrode. The second electrode 420 spaced apart in two directions and the second electrode 420 are included as the second sensor 1100 including the second bridge electrode 405 of another layer. Here, the first and second metal patterns 415 and 416 spaced apart from each other are the same layer as the second bridge electrode 405 and the first bridge electrode 407 and the second contact holes 417a and 417b are spaced apart from each other. Is electrically connected via In addition, the second bridge electrode 405 is connected to the second electrodes 420 adjacent to both ends thereof through the first contact holes 406a and 406b, respectively.

In addition, as shown in FIG. 9, when the intersections of the first and second sensors 1100 and 1200 are enlarged, the second electrode 420 and the first electrode 410 / the first bridge electrode 407 are enlarged. It can be seen that the dummy pattern 430 is further formed in the region.

In this case, the dummy pattern 430 is in a floating state, and is a pattern having no connection with the routing line, and the second electrode 420 and the first electrode 410 / the first bridge electrode 407. Between the layers, the first and second electrodes 410 and 420 spaced apart from each other to further prevent the visibility of the pattern caused by reflection.

In this case, the dummy pattern 430 is a transparent electrode component, the width of which is 10 ~ 300㎛. In addition, the distance between the first and second electrodes 410 and 420 and the first bridge electrode 407 from the outline is preferably 10 ~ 30㎛, accordingly, the first and second electrodes 410, The pattern of the 420 and the first bridge pattern 407 may be prevented, and the capacitance sensing may not be inhibited.

For example, after forming the touch panel, the first electrode 410 / the first bridge electrode 407 and the second electrode (when varying angles of looking at the panel and testing the degree of reflection of the surface) When 420 is spaced apart by a predetermined width or more, reflection may occur at an outline thereof. In addition, when the distance between the first and second electrodes 410 and 420 is very close, a diffraction phenomenon may occur at the interface and the boundary line may be viewed. In consideration of this point, the dummy pattern 430 is formed in a floating state without applying an electrical signal to prevent the pattern recognition of the first and second electrodes 410 and 420.

Compared to the above-described first embodiment, the fourth embodiment has a difference in that only the positions of the first and second electrodes are rotated by 90 degrees and the dummy pattern 430 is further provided.

As described above, in the structure having the connection pattern as the transparent electrode, by providing the metal pattern electrically connected to the transparent electrode, the RC delay can be reduced by reducing the resistance of the connection pattern itself. As a result of the measurement, a resistance reduction of about 10 to 20% compared to the structure without the metal pattern could be achieved.

This means that the connection pattern of the transparent electrode component may be further reduced, and the size of the diamond pattern of the transparent electrode component may be reduced in the remaining sensing region.

As a result, the current cell phone can be large in size, PDA, notebook, and large in size, even in a large area of the monitor, sufficient resistance can be reduced, and a large-area capacitive touch panel can be realized.

Currently, the sensing electrode area has a diagonal length of about 7.5 mm, and the sensing electrode may be sized to 6 mm or less for higher resolution. Accordingly, the resistance of the electrode portion formed of the transparent electrode will be further increased, and the effect of reducing the resistance will be more pronounced when the metal pattern of the present invention is provided.

In addition, when the performance of the chip is improved, and one-chip driving becomes possible, the need to reduce the resistance will be increased even when driving in the same method with the same size, and in this case, the effect of the above-described resistance reduction is greater. will be.

In addition, it can be implemented by maintaining the same number of masks without additional mask cost and process cost.

In addition, the resistance of the transparent electrode connection pattern can be reduced to prevent damage easily during the electrostatic test.

Meanwhile, the above-described touch panel may be formed by being attached to the liquid crystal panel, or directly formed with an electrode or the like on the rear side of the upper plate of the liquid crystal panel.

In other words, the substrate 100 is used as one substrate of the liquid crystal panel (mainly, the second substrate having the color filter array), and the back side of the liquid crystal layer is not used.

In this case, the liquid crystal panel (not shown) includes a first and a second substrate (not shown) facing each other, a liquid crystal layer (not shown) filled therebetween, and a first substrate facing the liquid crystal layer. And a thin film transistor array formed on the second substrate, and a color filter array formed on the second substrate facing the liquid crystal layer.

In this case, the thin film transistor array may include a gate line (Gate) and a data line (Data) that cross each other to define a pixel region, a thin film transistor (TFT) formed at an intersection of the gate line and the data line, and the The pixel region includes a pixel electrode (not shown).

In addition, the color filter array includes a black matrix layer, a color filter layer, and a common electrode (not shown, Vcom (applied voltage)).

In addition, after the touch panel including the first and second electrodes is provided on the second substrate, a cover glass (not shown) may be further provided on the upper part for damage from the outside or protection of the electrode. .

As described above, the touch panel integrated liquid crystal display device of the present invention is formed in a form in which the touch panel is mounted on the liquid crystal panel, preferably in an on-cell capacitive manner. The substrate may reduce the number of substrates used by using the second substrate of the liquid crystal panel.

In addition, the method used in the touch panel may be applicable to both a mutual capacitive type and a self capacitive type. For example, a case in which a driving voltage is applied to a first electrode and a second electrode senses a change in a voltage, an amount of charge, or a capacitance changed depending on whether it is touched is called a mutual capacitive type. It is a self-capacitance method in which a voltage is sequentially applied to the first and second electrodes, and a change in voltage, charged charge, or capacitance according to whether or not a touch is detected for each of the first and second electrodes is detected. do.

In addition, the electrodes described above are not limited to the diamond shape described above, and may be transformed into various types of polygons or circles including squares, parallelograms, octagons, and hexagons.

On the other hand, the present invention described above is not limited to the above-described embodiment and the accompanying drawings, it is possible that various substitutions, modifications and changes within the scope without departing from the technical spirit of the present invention. It will be apparent to those of ordinary skill in Esau.

100 substrate 105 second bridge electrode
106: insulating film 107: first contact hole
110, 210, 320, 420: second electrode 120, 220, 315: first bridge electrode
310, 410: first electrode
130, 231, and 232: first metal pattern 132: second contact hole
135, 234, and 245: second metal pattern 137: second contact hole
140: routing wiring 146: pad electrode
147a: third contact hole 147b: pad electrode open hole
148: routing contact electrode 149: pad electrode terminal
340: metal pattern 430: dummy pattern

Claims (24)

A plurality of transparent first electrodes spaced apart from each other and a first bridge electrode integrally connecting the adjacent first electrodes on the substrate in a first direction and arranged in a second direction crossing the first direction; First sensors;
A plurality of second second electrodes arranged in the first direction on the substrate, the second second electrodes including a plurality of transparent second electrodes spaced apart from each other, and a second bridge electrode made of metal connecting the adjacent second electrodes; sensor; And
And a metal pattern connected to the first bridge electrode to overlap the first bridge electrode. The method of claim 1,
And the metal pattern is formed of the same material on the same layer as the second bridge electrode. The method of claim 2,
And an insulating film between the first sensor and the second electrode and the layer of the second bridge electrode. The method of claim 3,
A touch panel according to both ends of the second bridge electrode, wherein the insulating film is provided with a first contact portion to which the second bridge electrode and the second electrode are connected. The method of claim 3,
The second bridge electrode is formed in the second direction, and the metal pattern is spaced apart with the second bridge electrode therebetween, and each of the first metal pattern and the second metal pattern formed in the first direction Touch panel. 6. The method of claim 5,
And a second contact portion in the insulating film so as to correspond to both ends of the first and second metal patterns, thereby connecting the first and second metal patterns and the first bridge electrode. 6. The method of claim 5,
The first and second metal patterns are each divided into a plurality of touch panels, characterized in that formed. The method of claim 1,
The metal pattern is formed on a layer different from the second bridge electrode,
The metal pattern is on the first bridge electrode, the touch panel, characterized in that formed directly in contact with the first bridge electrode. The method of claim 8,
And an insulating film between the first sensor and the second electrode and the layer of the second bridge electrode, wherein the insulating film has a first contact portion corresponding to both ends of the second bridge electrode. The method of claim 1,
The second bridge electrode and the metal pattern may include at least one of molybdenum (Mo), copper (Cu), silver (Ag), chromium (Cr), aluminum (Al), aluminum neodium (AlNd), and molybdenum titanium (MoTi). The touch panel, characterized in that the metal or a laminate comprising the at least one metal. The method of claim 10,
The second bridge electrode and the metal pattern are touch panels, characterized in that the chromium film and the chromium oxide film are sequentially stacked. The method of claim 1,
A pad electrode on one side of the substrate,
Further comprising a routing wire for connecting between the pad electrode and the end of the first sensor and the second sensor,
And the second bridge electrode and the metal pattern, and the pad electrode and the routing line are formed of the same metal on the same layer. The method of claim 1,
The width of the metal pattern is a touch panel, characterized in that 3 ~ 20㎛. The method of claim 13,
The width of the first bridge electrode is wider than the width of the metal pattern, the touch panel, characterized in that 10㎛ to 500㎛. Board;
An insulating film formed on the substrate;
A plurality of transparent first spaced apart electrodes in a first direction on the insulating layer and an integrated first bridge electrode connecting the adjacent first electrodes to be disposed in a second direction crossing the first direction; A plurality of first sensors;
A second bridge electrode formed on the insulating layer in the second direction and including a plurality of transparent spaced apart second electrodes and a metal connecting the adjacent second electrodes on the substrate; A plurality of second sensors disposed;
A metal pattern formed on the substrate to overlap the first bridge electrode; And
And a first contact portion formed on the insulating layer, the first contact portion connecting both ends of the second bridge electrode and the adjacent second electrodes, and a second contact portion connecting both ends of the metal pattern and the first bridge electrode. Touch panel. 16. The method of claim 15,
The metal pattern is located on the same layer as the two bridge electrodes,
The metal pattern may include a first metal pattern and a second metal pattern spaced apart from each other in the first direction with the second bridge electrode interposed therebetween. 17. The method of claim 16,
The first and second metal patterns are each divided into a plurality of touch panels, characterized in that formed. The method of claim 17,
And the second contact portion is positioned at both ends of each of the first metal pattern and the second metal pattern. 16. The method of claim 15,
The second bridge electrode and the metal pattern may include at least one of molybdenum (Mo), copper (Cu), silver (Ag), chromium (Cr), aluminum (Al), aluminum neodium (AlNd), and molybdenum titanium (MoTi). The touch panel, characterized in that the metal or a laminate comprising the at least one metal. 16. The method of claim 15,
The width of the metal pattern is a touch panel, characterized in that 3 ~ 20㎛. 16. The method of claim 15,
And a dummy pattern formed of a transparent electrode between the first electrode and the second electrode adjacent to the first bridge electrode. The method of claim 9,
The dummy pattern is a touch panel, characterized in that spaced apart from the outside of the first electrode, the first bridge electrode and the second electrode of 10 ~ 30㎛ intervals. The method of claim 9,
And the dummy pattern is in a floating state. A liquid crystal panel comprising a first substrate and a second substrate facing each other, and a liquid crystal layer filled between the first and second substrates;
An insulating film formed on the rear surface of the second substrate of the liquid crystal panel;
A plurality of transparent first spaced apart electrodes in a first direction on the insulating layer and an integrated first bridge electrode connecting the adjacent first electrodes to be disposed in a second direction crossing the first direction; A plurality of first sensors;
And a second bridge electrode formed on the insulating layer in the second direction and including a plurality of transparent spaced apart second electrodes and a metal connecting the adjacent second electrodes on the second substrate. A plurality of second sensors disposed in a direction;
A metal pattern formed on the second substrate so as to overlap the first bridge electrode; And
And a first contact portion formed on the insulating layer, the first contact portion connecting both ends of the second bridge electrode and the adjacent second electrodes, and a second contact portion connecting both ends of the metal pattern and the first bridge electrode. Touch panel integrated liquid crystal display device.

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