KR20160116743A - Touch panel - Google Patents

Abstract

According to an embodiment, a touch panel comprises: a first sensing electrode including multiple first electrode patterns; a second sensing electrode including multiple second electrode patterns; a bridge electrode connecting adjacent first electrode pattern; and an auxiliary electrode formed on the same layer as the bridge electrode and formed on at least any one electrode pattern among the first electrode pattern and the second electrode pattern.

Description

TOUCH PANEL {TOUCH PANEL}

The embodiment relates to a touch panel.

2. Description of the Related Art In recent years, a touch panel has been applied to an image displayed on a display device in various electronic products by a method of touching an input device such as a finger or a stylus.

Such a touch panel can largely be divided into a resistance film type touch panel and a capacitive type touch panel. In the resistive touch panel, the glass and the electrode are short-circuited by the pressure of the input device and the position is detected. A capacitance type touch panel senses a change in electrostatic capacitance between electrodes when a finger touches them, thereby detecting the position.

The resistance film type touch panel may be deteriorated in performance by repeated use, and scratch may occur. As a result, there is a growing interest in a capacitive touch panel having excellent durability and long life span.

The capacitive touch panel is defined as a valid region capable of inputting a touch command and a non-valid region outside the valid region. The electrode pattern formed in the effective region is formed of a transparent conductive material so as to transmit light from the display device.

The electrode pattern is formed of a transparent conductive material and has a relatively high resistance as compared with a metal material. Particularly, there is a problem that an edge region of the electrode pattern has a large resistance, an RC delay occurs due to the resistance of the electrode pattern, a response speed is lowered, and a signal is distorted.

Embodiments provide a touch panel capable of improving response speed and preventing signal distortion.

A touch panel according to an embodiment includes: a first sensing electrode including a plurality of first electrode patterns; A second sensing electrode including a plurality of second electrode patterns; A bridge electrode connecting the adjacent first electrode patterns; And an auxiliary electrode formed on the same layer as the bridge electrode and formed on at least one of the first electrode pattern and the second electrode pattern.

The touch panel according to the embodiment can reduce the resistance value by forming the auxiliary electrode in the edge area of the electrode pattern, thereby preventing signal distortion and increasing the touch sensitivity.

1 is a top view showing a touch panel according to the first embodiment.
Fig. 2 is an enlarged view of the X region in Fig. 1. Fig.
3 is a cross-sectional view of the sensing electrode of FIG. 2 taken along the line AA '.
4 is a cross-sectional view of the sensing electrode of FIG. 2 cut in the direction BB '.
FIG. 5 is a cross-sectional view of the sensing electrode of FIG. 2 cut in the CC 'direction.
6 is an enlarged view of the X region of the touch panel according to the second embodiment.
7 is a cross-sectional view of the sensing electrode of FIG. 6 cut in the direction AA '.
8 is a cross-sectional view of the sensing electrode of FIG. 6 cut in the direction BB '.
FIG. 9 is a cross-sectional view of the sensing electrode of FIG. 6 cut in the CC 'direction.
10 is an enlarged view of the X region of the touch panel according to the third embodiment.
11 is a cross-sectional view of the sensing electrode of FIG. 10 taken along the CC 'direction.
12 is a diagram showing changes in resistance values of Tx and Rx in the prior art and the first to third embodiments.
13 is a diagram showing the amount of change in capacitance of the prior art and the first to third embodiments.
14 is an enlarged view of the touch panel according to the fourth embodiment.
15 is a cross-sectional view of the sensing electrode of FIG. 14 cut in the direction AA '.
FIG. 16 is a cross-sectional view of the sensing electrode of FIG. 14 taken along the line BB ''.
17 is a top view of the touch panel according to the fifth embodiment.
18 is a perspective view of a display device to which a touch panel according to the first to fifth embodiments is applied.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. 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 inventive concept. Other embodiments falling within the scope of the inventive concept may readily be suggested, but are also considered to be within the scope of the present invention.

The same reference numerals are used to designate the same components in the same reference numerals in the drawings of the embodiments.

A touch panel according to an embodiment includes: a first sensing electrode including a plurality of first electrode patterns; A second sensing electrode including a plurality of second electrode patterns; A bridge electrode connecting the adjacent first electrode patterns; And an auxiliary electrode formed on the same layer as the bridge electrode and formed on at least one of the first electrode pattern and the second electrode pattern.

The auxiliary electrode may be formed in an edge region of the electrode pattern.

And an insulating layer formed between the bridge electrode and the second sensing electrode.

The auxiliary electrode may be formed on the insulating layer.

The insulating layer may be formed only in a region corresponding to a region where the auxiliary electrode and the bridge electrode are formed.

The auxiliary electrode may be formed on the second alignment axis of the second electrode pattern.

The auxiliary electrode may be electrically connected to the electrode pattern.

The auxiliary electrode may be electrically connected to the electrode pattern through at least one contact hole.

And a dummy pattern positioned between the first electrode pattern and the second electrode pattern.

The first electrode pattern and the second electrode pattern may be rhombic.

The first electrode pattern and the second electrode pattern may be bar-shaped.

The auxiliary electrode may be spaced apart from the outer boundary of the electrode pattern by a predetermined distance.

Hereinafter, a touch panel according to an embodiment will be described with reference to the drawings.

1 is a top view showing a touch panel according to the first embodiment.

Referring to FIG. 1, the touch panel 1 according to the first embodiment may include a valid area AA and a non-valid area UA.

The valid area AA is an area where a user can input a touch command. The non-valid area UA is not activated even when a user located outside the valid area AA is touched, Which is not realized.

The effective area AA and the non-effective area UA of the touch panel 1 may correspond to the display area and the non-display area of the display device when the touch panel 1 is attached to the display panel. The display area is an area for displaying an image and the non-display area is an area for not displaying an image. Therefore, the effective area AA of the touch panel should be a region that can transmit light, and the non-effective area UA of the touch panel may be a region that does not transmit light.

A plurality of electrode patterns may be formed in the effective area AA. The first sensing electrode 20 and the second sensing electrode 30 may be formed in the effective region AA of the substrate 10. [

The first sensing electrode 20 may include a plurality of first electrode patterns 21 and the second sensing electrode 30 may include a plurality of second electrode patterns 31. The plurality of first electrode patterns 21 may be arranged in a first direction and the plurality of second electrode patterns 31 may be arranged in a second direction. The second direction may be a direction intersecting with the first direction.

Each of the first electrode patterns 21 can be electrically connected to the adjacent first electrode patterns 21 and each second electrode pattern 31 can be electrically connected to the adjacent second electrode patterns 31. [ have. The first electrode pattern 21 and the second electrode pattern 31 may be defined as a unit conductive pattern. A touch pixel may be constituted by at least one unit conductive pattern.

The first sensing electrode 20 may intersect the second sensing electrode 30 at an intersecting region 40. In the crossing region 40, the first sensing electrode 20 and the second sensing electrode 30 may intersect in an electrically insulated state.

A plurality of wiring patterns may be formed in the non-effective area UA. A plurality of first wiring patterns 41 and a plurality of second wiring patterns 43 may be formed in the ineffective area UA of the substrate 10. [

The first sensing electrode 20 may be electrically connected to the first wiring pattern 41. The first sensing electrode 20 may be formed integrally with the first wiring pattern 41 and the first sensing electrode 20 may be formed separately from the first wiring pattern 41.

The second sensing electrode 30 may be electrically connected to the second wiring pattern 43. The second sensing electrode 30 may be formed integrally with the second wiring pattern 43 and the second sensing electrode 30 may be formed separately from the second wiring pattern 43.

The first and second sensing electrodes 20 and 30 and the first and second wiring patterns 41 and 43 may include a conductive material. The first and second sensing electrodes 20 and 30 may be formed of a transparent conductive material.

FIG. 2 is an enlarged view of the X region of FIG. 1, FIG. 3 is a cross-sectional view of the sensing electrode of FIG. 2 cut along the AA 'direction, FIG. 4 is a cross- FIG. 5 is a cross-sectional view of the sensing electrode of FIG. 2 cut in the CC 'direction.

2 to 5, a portion of the sensing electrode of the touch panel 1 according to the first embodiment is enlarged. A first sensing electrode 20 and a second sensing electrode 30 Is formed. The first sensing electrode 20 includes a plurality of first electrode patterns 21 and the second sensing electrode 30 includes a plurality of second electrode patterns 31 and a connecting electrode 33.

Each first electrode pattern 21 and the second electrode pattern 31 may be formed in a rhombic shape. The connection electrode 33 may be formed in the intersection region 40 where the first sensing electrode 20 and the second sensing electrode 30 intersect. The connection electrode 33 may be formed between the adjacent second electrode patterns 31. The connecting electrode 33 may electrically connect the adjacent second electrode patterns 31. [

The first electrode pattern 21, the second electrode pattern 31, and the connection electrode 33 may be formed on the substrate 10. The first electrode pattern 21, the second electrode pattern 31, and the connection electrode 33 may be formed on the same layer. The first electrode pattern 21, the second electrode pattern 31, and the connection electrode 33 may be formed of the same material.

The first electrode pattern 21, the second electrode pattern 31 and the connection electrode 33 may be formed of indium tin oxide (ITO), copper oxide, carbon nano tube (CNT) Ag nanowire, PEDOT and nano fiber, Ag, Molybdenum, Ni and Indium Zinc Oxide (IZO) are used as the material of the electrode. ), ≪ / RTI > and at least one < RTI ID = 0.0 > conductive < / RTI >

The second electrode pattern 31 and the connection electrode 33 may be integrally formed.

An insulating layer 70 may be formed on the substrate 10 on which the first electrode pattern 21, the second electrode pattern 31 and the connecting electrode 33 are formed. A plurality of contact holes 71 may be formed in the insulating layer 70.

The plurality of contact holes 71 may be formed through the insulating layer 70. The plurality of contact holes 71 may be formed to expose a portion of the first electrode pattern 21, the second electrode pattern 31, or the connection electrode 33. The plurality of contact holes 71 may be formed between the first electrode pattern 21 and the second electrode pattern 31.

The insulating layer 70 may be formed in the crossing region 40. The insulating layer 70 electrically isolates the first electrode pattern 21, the second electrode pattern 31 and the connecting electrode 33 from the bridge electrode 51 and the auxiliary electrode 60 to be formed later Can play a role.

The bridge electrode 51 and the auxiliary electrode 60 may be formed on the insulating layer 70.

The bridge electrode 51 may be formed along a first direction that is an arrangement direction of the first sensing electrodes 20. [ The bridge electrode 51 may electrically connect the adjacent first electrode patterns 21. The bridge electrode 51 may extend from the first electrode pattern 21 to the intersection region 40 and may be formed on the adjacent first electrode pattern 21. The bridge electrode 51 may be formed on the plurality of contact holes 71. The bridge electrode 51 may be filled in the contact hole 71. The bridge electrode 51 may be electrically connected to the first electrode pattern 21 through the plurality of contact holes 71. The bridge electrode 51 is electrically connected to the first electrode pattern 21 through the plurality of contact holes 71, thereby increasing the contact area and reducing the contact resistance.

Since the bridge electrode 51 is formed on the insulating layer 70 in the intersecting region 40, the intersecting first sensing electrode 20 and the second sensing electrode 30 are electrically insulated The adjacent first electrode patterns 21 may be electrically connected.

The auxiliary electrode 60 may include a first auxiliary electrode 61, a connection pattern 62, a second auxiliary electrode 63, and a third auxiliary electrode 65.

The first auxiliary electrode 61 may be formed on a region where the first electrode pattern 21 is formed. The first auxiliary electrode 61 may be formed at an edge of the first electrode pattern 21. The first auxiliary electrode 61 may be formed at an edge region of the first electrode pattern 21.

The first auxiliary electrode 61 may be electrically connected to the first electrode pattern 21. The first auxiliary electrode 61 may be electrically connected to the first electrode pattern 21 through a plurality of contact holes 71. The first auxiliary electrode 61 may be formed on the first electrode pattern 21 and electrically connected to the first electrode pattern 21 to serve as a path for transferring charges. The charge can move through the first auxiliary electrode 61 and the resistance of the first sensing electrode 20 can be reduced. As the resistance of the first sensing electrode 20 decreases, the RC delay is attenuated to prevent distortion of the signal, thereby improving the response speed and increasing the touch sensitivity.

Particularly, since the first auxiliary electrode 61 is formed in the edge region having a relatively large resistance value in the first electrode pattern 21, a low resistance value of the edge region of the first electrode pattern 21 can be compensated Thereby, the response speed is improved and the touch sensitivity is increased.

Further, a characteristic such as a crack is generated in a partial area of the first electrode pattern 21 Even when a change occurs, the first auxiliary electrode 61 is used as an auxiliary movement path of the electric charge, thereby preventing the electrical opening, thereby preventing defects.

A plurality of connection patterns 62 may be formed in the intersection region 40. The plurality of connection patterns 62 may be formed in a direction parallel to the bridge electrodes 51. The plurality of connection patterns 62 may be located on both sides of the bridge electrode 51. That is, the bridge electrode 51 may be located between the connection patterns 62.

The connection pattern 62 may electrically connect the first auxiliary electrode 61 of the adjacent first electrode pattern 21. The connection pattern 62 may be integrally connected to the first auxiliary electrode 61. The first auxiliary electrode 61 formed on the adjacent first electrode pattern 21 is electrically connected through the connection pattern 62 to electrically connect the connection pattern 62 to the adjacent first electrode patterns 21. [ It can be used as an auxiliary transfer path of charge. Therefore, even if the bridge electrode 51 is damaged and electrically opened, the electrical connection between the adjacent first electrode patterns 21 can be maintained. This can prevent the entirety of the touch panel 1 from being defective.

The second auxiliary electrode 63 may be formed on a region where the second electrode pattern 31 is formed. The second auxiliary electrode 63 may be formed at the edge of the second electrode pattern 31. The second auxiliary electrode 63 may be formed in an edge region of the second electrode pattern 31.

The second auxiliary electrode 63 may be electrically connected to the second electrode pattern 31. The second auxiliary electrode 63 may be electrically connected to the second electrode pattern 31 through a plurality of contact holes 71. The second auxiliary electrode 63 may be formed on the second electrode pattern 31 and electrically connected to the second electrode pattern 31 to serve as a path for transferring charges. The charge can move through the second auxiliary electrode 63 and the resistance of the second sensing electrode 30 can be reduced. As the resistance of the second sensing electrode 30 is reduced, the RC delay is attenuated to prevent distortion of the signal, thereby improving the response speed and increasing the touch sensitivity.

Particularly, since the second auxiliary electrode 63 is formed in the edge region having a relatively large resistance value in the second electrode pattern 31, a low resistance value of the edge region of the second electrode pattern 31 can be compensated Thereby, the response speed is improved and the touch sensitivity is increased.

In addition, a characteristic such as a crack is generated in a partial area of the second electrode pattern 31 Even when a change occurs, the second auxiliary electrode 31 is used as an auxiliary movement path of the electric charge, thereby preventing electrical opening, thereby preventing defects.

The first electrode pattern 21 and the second electrode pattern 31 are electrically insulated from each other by a dielectric material between the first electrode pattern 21 and the second electrode pattern 31, And the value of the first capacitor is changed by a touch of the user's finger or the like, so that the touch can be sensed.

Since the first auxiliary electrode 61 and the second auxiliary electrode 63 are also insulated and the dielectric material is located between the first auxiliary electrode 61 and the second auxiliary electrode 63, The auxiliary electrode 61 and the second auxiliary electrode 63 may also function as a second capacitor. Since the first capacitor and the second capacitor are connected in parallel, the total capacitor value increases, so that the touch sensitivity can be improved.

Since the first auxiliary electrode 61 and the second auxiliary electrode 63 are located in a region close to the area where the user's finger or the like contacts the first auxiliary electrode 61 and the second auxiliary electrode 63, It is possible to minimize the deterioration of the touch sensitivity by the substrate that can be applied on the substrate.

The third auxiliary electrode 65 may be formed on a region where the second electrode pattern 31 is formed. The third auxiliary electrode 65 may be formed in a central region of the second electrode pattern 31. The third auxiliary electrode 65 may be formed along a second direction, which is an arrangement direction of the second sensing electrodes 30. The third auxiliary electrode 65 may be formed in a direction crossing the bridge electrode 51.

The third auxiliary electrode 65 may connect the second auxiliary electrode 63 formed along the edge region of one second electrode pattern 31 across the second electrode pattern 31. The third auxiliary electrode 65 may be electrically connected to the second electrode pattern 31. The third auxiliary electrode 65 may be electrically connected to the second electrode pattern 31 through a plurality of contact holes 71. The third auxiliary electrode 65 may be formed on the second electrode pattern 31 and electrically connected to the second electrode pattern 31 to serve as a path for transferring charges. The charge can move through the third auxiliary electrode 65 and the resistance of the second sensing electrode 30 can be reduced. As the resistance of the second sensing electrode 30 is reduced, the RC delay is attenuated to prevent distortion of the signal, thereby improving the response speed and increasing the touch sensitivity.

The bridge electrode 51 and the auxiliary electrode 60 may be formed of the same material. The bridge electrode 51 and the auxiliary electrode 60 may be formed of a transparent conductive material. When the bridge electrode 51 and the auxiliary electrode 60 include a transparent conductive material, a conductive material such as indium tin oxide (ITO), copper oxide, carbon nano tube (CNT), metal mesh ), Silver nano wire, conductive film (PEDOT: PSS), and nanofibers of silver (Ag), molybdenum, nickel (Ni) and indium zinc oxide (IZO) And may include at least one selected conductive material.

Alternatively, the bridge electrode 51 and the auxiliary electrode 60 may include a metal material having a low resistance. When the bridge electrode 51 and the auxiliary electrode 60 include a metal material having a low resistance, chromium (Cr), nickel (Ni), aluminum (Al), platinum (Pt), gold (Au), tungsten ), Copper (Cu), and molybdenum (Mo).

The bridge electrode 51 and the auxiliary electrode 60 may be formed of the same material as the first wiring pattern 41 and the second wiring pattern 43. The bridge electrode 51 and the auxiliary electrode 60 may be formed through the same process as the first wiring pattern 41 and the second wiring pattern 43. The bridge electrode 51 and the auxiliary electrode 60 may be formed simultaneously with the first wiring pattern 41 and the second wiring pattern 43. When the bridge electrode 51 and the auxiliary electrode 60 are formed simultaneously with the first wiring pattern 41 and the second wiring pattern 43, the formation process of the separate bridge electrode 51 and the auxiliary electrode 60 It is possible to simplify the process so that the manufacturing cost can be reduced and the manufacturing yield can be improved.

6 is an enlarged view of the X region of the touch panel according to the second embodiment, FIG. 7 is a cross-sectional view of the sensing electrode of FIG. 6 cut in the direction of AA ', FIG. 8 is a cross- And FIG. 9 is a cross-sectional view of the sensing electrode of FIG. 6 cut in the CC 'direction.

The touch panel according to the second embodiment differs from the first embodiment in the structure of the intersection area and further includes a dummy pattern as compared with the first embodiment. Therefore, in describing the second embodiment, the same reference numerals are assigned to the same components as those of the first embodiment, and a detailed description thereof is omitted.

Referring to FIGS. 6 to 9, the touch panel 101 according to the second embodiment includes a first sensing electrode 120 and a second sensing electrode 130 formed on a substrate 110.

The first sensing electrode 120 includes a plurality of first electrode patterns 121 and the second sensing electrode 130 includes a plurality of second electrode patterns 131 and a connection electrode 133.

The connection electrode 133 may be formed in the intersection region 140 where the first sensing electrode 120 and the second sensing electrode 130 intersect. The connection electrode 133 may be formed between adjacent second electrode patterns 131.

The first electrode pattern 121, the second electrode pattern 131, and the connection electrode 133 may be formed on the substrate 110. A dummy pattern 180 may be formed on the substrate 110.

The dummy pattern 180 may be formed in a region between the first electrode pattern 121 and the second electrode pattern 131. The dummy pattern 180 may be electrically opened to the first electrode pattern 121 and the second electrode pattern 131. The dummy pattern 180 may be formed of the same material as the first electrode pattern 121 and the second electrode pattern 131.

The dummy pattern 180 is formed in a region adjacent to the edge regions of the first electrode pattern 121 and the second electrode pattern 131 so that the dummy patterns 180 are formed on the first electrode pattern 121 and the second electrode pattern 131, The low resistance value of the edge can be compensated. The dummy patterns 180 are formed of the same material as the first electrode patterns 121 and the second electrode patterns 131 and are formed in the regions where the first electrode patterns 121 and the second electrode patterns 131 are formed The first electrode pattern 121 and the second electrode pattern 131 can be prevented from being visually recognized by compensating for the difference in transmittance and refractive index between the first electrode pattern 121 and the second electrode pattern 131.

The insulating layer 170 may be formed on the substrate 110 on which the first electrode pattern 121, the second electrode pattern 131, the connection electrode 133, and the dummy pattern 180 are formed. A plurality of contact holes 171 may be formed in the insulating layer 170.

The insulating layer 170 may be formed in the intersection region 140. The insulating layer 170 is formed on the first electrode pattern 121, the second electrode pattern 131, the connecting electrode 133 and the dummy pattern 180 and the bridge electrode 151 and the auxiliary electrode 160 To electrically isolate the electrodes.

The bridge electrode 151 and the auxiliary electrode 160 may be formed on the insulating layer 170.

The bridge electrode 151 may be formed along a first direction that is an arrangement direction of the first sensing electrodes 120. The bridge electrode 151 may electrically connect adjacent first electrode patterns 121. The bridge electrode 151 may extend from the first electrode pattern 121 to the intersection region 140 and may be formed on the adjacent first electrode pattern 121. The bridge electrode 151 may be formed on the plurality of contact holes 171. The bridge electrode 151 may be filled in the contact hole 171. The bridge electrode 151 may be electrically connected to the first electrode pattern 121 through the plurality of contact holes 171. The bridge electrode 151 is electrically connected to the first electrode pattern 121 through the plurality of contact holes 171, thereby increasing the contact area and reducing the contact resistance.

Since the bridge electrode 151 is formed on the insulating layer 170 in the intersecting region 140, the intersecting first sensing electrode 120 and the second sensing electrode 130 are electrically insulated from each other The first electrode pattern 121 may be electrically connected.

The auxiliary electrode 160 may include a first auxiliary electrode 161, a second auxiliary electrode 163, and a third auxiliary electrode 165.

The first auxiliary electrode 161 may be formed on a region where the first electrode pattern 121 is formed. The first auxiliary electrode 161 may be formed in an edge region of the first electrode pattern 121. The first auxiliary electrode 161 may be formed along an outer boundary surface of the first electrode pattern 121. The first auxiliary electrode 161 may be spaced apart from the outer boundary of the first electrode pattern 121 by a predetermined distance. The first auxiliary electrode 161 is spaced apart from the outer boundary of the first electrode pattern 121 by a predetermined distance so that even if the mask is misaligned at the time of forming the first auxiliary electrode 161, 161 may be formed on the first electrode pattern 121. [

The first auxiliary electrode 161 may be electrically connected to the first electrode pattern 121. The first auxiliary electrode 161 may be electrically connected to the first electrode pattern 121 through a plurality of contact holes 171. The first auxiliary electrode 161 may be electrically connected to the bridge electrode 151.

The second auxiliary electrode 163 may be formed on a region where the second electrode pattern 131 is formed. The second auxiliary electrode 163 may be formed at an edge region of the second electrode pattern 131. The second auxiliary electrode 163 may be formed along an outer boundary surface of the second electrode pattern 131. The second auxiliary electrode 163 may be spaced apart from the outer boundary of the second electrode pattern 131 by a predetermined distance. The second auxiliary electrode 163 is spaced apart from the outer boundary surface of the second electrode pattern 131 by a predetermined distance so that even if the mask is misaligned at the time of forming the second auxiliary electrode 163, 163 may be formed on the second electrode pattern 121.

The second auxiliary electrode 163 may be electrically connected to the second electrode pattern 131. The second auxiliary electrode 163 may be electrically connected to the second electrode pattern 131 through a plurality of contact holes 171.

The third auxiliary electrode 165 may be formed on a region where the second electrode pattern 131 is formed. The third auxiliary electrode 165 may be formed in a central region of the second electrode pattern 131. The third auxiliary electrode 165 may be formed along a second direction, which is an arrangement direction of the second sensing electrodes 130. The third auxiliary electrode 165 may be formed in a direction crossing the bridge electrode 151.

The third auxiliary electrode 165 may connect the second auxiliary electrode 163 formed along the edge region of one second electrode pattern 131 across the second electrode pattern 131. The third auxiliary electrode 165 may extend to the connection region 140 across the second electrode pattern 131. The third auxiliary electrode 165 may be electrically connected to the second electrode pattern 131. The third auxiliary electrode 165 may be electrically connected to the second electrode pattern 131 through a plurality of contact holes 171. The third auxiliary electrode 165 extends to the connection region 140 and may be electrically connected to the connection electrode 133 through the contact hole 171 in the connection region 140. The bridge electrode 151 and the third auxiliary electrode 165 may be spaced apart from each other on the connection region 140. The bridge electrode 151 and the third auxiliary electrode 165 may be spaced apart from each other on the connection region 140 to function as a capacitor. The bridge electrode 151 and the third auxiliary electrode 165 act as capacitors and the touch sensitivity of the touch panel 101 can be increased.

The third auxiliary electrode 165 may be formed on the second electrode pattern 131 and electrically connected to the second electrode pattern 131 to serve as a path for transferring charges.

FIG. 10 is an enlarged view of the X region of the touch panel according to the third embodiment, and FIG. 11 is a cross-sectional view of the sensing electrode taken along the line CC 'in FIG.

The touch panel according to the third embodiment differs from the first embodiment in the shape of the insulating layer and the remaining components are the same. Therefore, in describing the touch panel according to the third embodiment, the same reference numerals are assigned to the components common to those of the first embodiment, and a detailed description thereof will be omitted.

10 and 11, a first sensing electrode 220 and a second sensing electrode 230 are formed on the substrate 210 of the touch panel 201 according to the third embodiment.

The first sensing electrode 220 includes a plurality of first electrode patterns 221 and the second sensing electrode 230 includes a plurality of second electrode patterns 231 and a connecting electrode 233.

The connection electrode 233 may be formed in the intersection region 240 where the first sensing electrode 220 and the second sensing electrode 230 intersect. The connection electrode 233 may be formed between adjacent second electrode patterns 231.

The insulating layer 270 may be formed on the substrate 210 on which the first electrode pattern 221, the second electrode pattern 231 and the connecting electrode 233 are formed. A plurality of contact holes 271 and a plurality of openings 273 may be formed in the insulating layer 270.

The insulating layer 270 may be formed in the intersection region 240. The insulating layer 270 electrically isolates the first electrode pattern 221, the second electrode pattern 231 and the connecting electrode 233 from the bridge electrode 251 and the auxiliary electrode 260 to be formed later Can play a role.

The plurality of openings 273 may be formed on a partial area of the first electrode pattern 221 and the second electrode pattern 231. The plurality of openings 273 may be formed through the insulating layer 270. The plurality of openings 273 may be formed to expose the first electrode pattern 221 or the second electrode pattern 231.

A bridge electrode 251 and an auxiliary electrode 260 may be formed on the insulating layer 270. The auxiliary electrode 260 may include a first auxiliary electrode 261, a second auxiliary electrode 263, and a third auxiliary electrode 265.

The bridge electrode 251 and the auxiliary electrode 260 may be spaced apart from the opening 273. The bridge electrode 251 and the auxiliary electrode 260 may be formed only in the region where the insulating layer 270 is formed. That is, the insulating layer 270 may be formed at a position corresponding to the bridge electrode 251 and the auxiliary electrode 260.

The opening 273 may be formed only in a region where the bridge electrode 251 and the auxiliary electrode 260 are not formed to expose the first electrode pattern 221 and the second electrode pattern 231. A part of the first electrode pattern 221 and the second electrode pattern 231 are exposed by the opening 273 to reduce light blocked by the insulating layer 270. That is, the light transmittance of the touch panel 201 can be increased by the opening 273. The light transmittance of the touch panel 201 is increased and the image quality of the display device to which the touch panel 201 is coupled is improved.

Table 1 shows Tx and Rx resistances and capacitance change amounts in the prior art and the first to third embodiments, FIG. 12 shows changes in Tx and Rx resistance values in the prior art and the first to third embodiments, And Fig. 13 is a graph showing the amount of change in capacitance of the prior art and the first to third embodiments.

Referring to Table 1, FIG. 12 and FIG. 13, any one of the first sensing electrode 20 and the second sensing electrode 30 in the first to third embodiments can be used as an Rx electrode, Tx electrode. The amount of capacitance change refers to a capacitance that changes when an external conductor contacts a user's finger or the like.

The first embodiment shows a touch panel in which an auxiliary electrode is formed on a first electrode pattern and a second electrode pattern. The second embodiment differs from the first embodiment in the structure of the intersection area and further includes a dummy pattern And the third embodiment shows a touch panel in which an opening for exposing the first electrode pattern and the second electrode pattern is formed on the touch panel according to the first embodiment.

Conventional technology First Embodiment Second Embodiment Third Embodiment Rx Resistance (Ω) 472.43 37.61 47.768 37.778 Rx Resistance Ratio (%) 100 8 10 8 Tx Resistance (Ω) 587.28 201.77 117.08 203.99 Tx Resistance Ratio (%) 100 34 30 35 Capacitance change (pF) 0.14213 0.14348 0.14458 0.1453

As shown in Table 1, the Rx resistance in the prior art is 472.43?, The Rx resistance in the first embodiment is 37.61?, And the Rx resistance in the first embodiment is 8% of that in the prior art. In addition, the Rx resistance in the second embodiment is 47.768?, Which is 10% of that in the prior art, and the Rx resistance in the third embodiment is 37.778?, Which is 8% of that of the prior art.

In addition, the Tx resistance in the prior art is 587.28?, The Tx resistance in the first embodiment is 201.77?, The resistance value is 34% as compared with the prior art, the Tx resistance in the second embodiment is 117.08? Has a resistance value of 30% with respect to the technology, and the Tx resistance in the third embodiment is 203.99Ω, which is 35% of that of the conventional art.

The first sensing electrode and the second sensing electrode of the touch panel of the first to third embodiments have a lower resistance value than that of the conventional art, so that the RC delay is attenuated to prevent distortion of the signal, Can be increased.

In the prior art, the amount of change in capacitance upon contact with an external conductor is 0.14213 pF, the amount of capacitance change in the first embodiment is 0.14348 pF, the amount of capacitance change in the second embodiment is 0.14458 pF, and the capacitance in the third embodiment The variation is 0.14458 pF.

The capacitors constituted by the auxiliary electrodes are connected in parallel with the capacitors between the adjacent electrode patterns in the first embodiment as compared with the prior art, so that the total capacitor value increases and the amount of capacitance variation increases.

In the second embodiment, the capacitance value is increased by the dummy pattern, and the capacitance variation is increased.

In the third embodiment, a portion of the insulating layer is removed by the opening region, and the configuration for interrupting the electric field between the external conductor and the electrode pattern is eliminated, thereby increasing the amount of capacitance change.

The capacitance variation amount when the external conductor contacts the touch panel in the first to third embodiments with respect to the prior art has a large value, and when the same contact is made, the changed capacitance value increases and the touch sensitivity increases.

FIG. 14 is an enlarged view of the touch panel according to the fourth embodiment, FIG. 15 is a cross-sectional view of the sensing electrode taken along line AA 'in FIG. 14, and FIG. Fig.

The touch panel according to the fourth embodiment differs from the first embodiment in the shape of the sensing electrode and the auxiliary electrode, and the remaining components are the same. Therefore, in describing the touch panel according to the fourth embodiment, the same reference numerals are assigned to the components common to those of the first embodiment, and a detailed description thereof will be omitted.

14 to 16, a first sensing electrode 320 and a second sensing electrode 330 are formed on a substrate 310 of the touch panel 301 according to the fourth embodiment.

The first sensing electrode 320 includes a plurality of first electrode patterns 321 and the second sensing electrode 330 includes a plurality of second electrode patterns 331 and a connecting electrode 333.

The first electrode pattern 321 and the second electrode pattern 331 may have a rectangular shape. The first electrode pattern 321 and the second electrode pattern 331 may be formed in a bar shape.

The connection electrode 333 may be formed in the intersection region 340 where the first sensing electrode 320 and the second sensing electrode 330 intersect. The connection electrode 333 may be formed between adjacent second electrode patterns 331.

An insulating layer 370 may be formed on the substrate 310 on which the first electrode pattern 321, the second electrode pattern 331 and the connecting electrode 333 are formed. A plurality of contact holes 371 may be formed in the insulating layer 370.

The insulating layer 370 may be formed in the intersection region 340. The insulating layer 370 electrically isolates the first electrode pattern 321, the second electrode pattern 331 and the connection electrode 333 from the bridge electrode 351 and the auxiliary electrode 360 to be formed later Can play a role.

A bridge electrode 351 and an auxiliary electrode 360 may be formed on the insulating layer 370.

The bridge electrode 351 may be formed along a first direction that is an arrangement direction of the first sensing electrodes 320. The bridge electrode 351 may electrically connect adjacent first electrode patterns 321. The bridge electrode 351 may extend from the first electrode pattern 321 to the intersection region 340 and may be formed on the adjacent first electrode pattern 321. The bridge electrode 351 may be electrically connected to the first electrode pattern 321 through a plurality of contact holes 371.

The auxiliary electrode 360 may include a first auxiliary electrode 361, a second auxiliary electrode 363, and a third auxiliary electrode 365.

The first auxiliary electrode 361 may be formed on a region where the first electrode pattern 321 is formed. The first auxiliary electrode 361 may be formed in an edge region of the first electrode pattern 321. The first auxiliary electrode 361 may be formed along the outer boundary surface of the first electrode pattern 321. The first auxiliary electrode 361 may be formed in a rectangular band shape along the outer boundary surface of the first electrode pattern 321.

The first auxiliary electrode 361 may be electrically connected to the first electrode pattern 321. The first auxiliary electrode 361 may be electrically connected to the first electrode pattern 321 through a plurality of contact holes 371. Also, the first auxiliary electrode 361 may be electrically connected to the bridge electrode 351.

The second auxiliary electrode 363 may be formed on a region where the second electrode pattern 331 is formed. The second auxiliary electrode 363 may be formed in an edge region of the second electrode pattern 331. The second auxiliary electrode 363 may be formed along an outer boundary surface of the second electrode pattern 331. The second auxiliary electrode 363 may be formed in a rectangular band shape along the outer boundary surface of the second electrode pattern 331.

The second auxiliary electrode 363 may be electrically connected to the second electrode pattern 331. The second auxiliary electrode 363 may be electrically connected to the second electrode pattern 331 through a plurality of contact holes 371.

The third auxiliary electrode 365 may be formed on a region where the second electrode pattern 331 is formed. The third auxiliary electrode 365 may be formed in a central region of the second electrode pattern 331. The third auxiliary electrode 365 may be formed along a second direction, which is an arrangement direction of the second sensing electrodes 330. The third auxiliary electrode 365 may be formed to cross the bridge electrode 351.

The third auxiliary electrode 365 may connect the second auxiliary electrode 363 formed along the edge region of one second electrode pattern 331 across the second electrode pattern 331. The third auxiliary electrode 365 may extend to the connection region 340 across the second electrode pattern 331. The third auxiliary electrode 365 may be electrically connected to the second electrode pattern 331. The third auxiliary electrode 365 may be electrically connected to the second electrode pattern 331 through a plurality of contact holes 371.

The resistance values of the first sensing electrode 320 and the second sensing electrode 330 are reduced through the auxiliary electrode 360 to thereby attenuate the RC delay to thereby prevent distortion of the signal, And the touch sensitivity is increased.

17 is a top view of the touch panel according to the fifth embodiment.

The touch panel according to the fifth embodiment differs from the first embodiment in the shape of the auxiliary electrode, and the remaining components are the same. Therefore, in describing the fifth embodiment, the same reference numerals are assigned to the components common to those of the first embodiment, and a detailed description thereof will be omitted.

Referring to FIG. 17, a first sensing electrode 20 and a second sensing electrode 30 are formed on a substrate 10 of a touch panel 1 according to the fifth embodiment.

The first sensing electrode 20 includes a plurality of first electrode patterns 21 and the second sensing electrode 30 includes a plurality of second electrode patterns 31 and a connecting electrode 33.

The connection electrode 33 may be formed in the intersection region 40 where the first sensing electrode 20 and the second sensing electrode 30 intersect. The connection electrode 33 may be formed between the adjacent second electrode patterns 31.

An insulating layer 70 may be formed on the substrate 10 on which the first electrode pattern 21, the second electrode pattern 31 and the connecting electrode 33 are formed. A plurality of contact holes 71 may be formed in the insulating layer 70.

The insulating layer 70 may be formed in the crossing region 40. The insulating layer 70 electrically isolates the first electrode pattern 21, the second electrode pattern 31 and the connecting electrode 33 from the bridge electrode 51 and the auxiliary electrode 60 to be formed later can do.

The bridge electrode 51 and the auxiliary electrode 60 may be formed on the insulating layer 70. The auxiliary electrode 60 may include a first auxiliary electrode 61, a second auxiliary electrode 63, a third auxiliary electrode 65, a fourth auxiliary electrode 67 and a fifth auxiliary electrode 69 have.

The first auxiliary electrode 61 may be formed on a region where the first electrode pattern 21 is formed. The first auxiliary electrode 61 may be formed at an edge of the first electrode pattern 21. The first auxiliary electrode 61 may be formed at an edge region of the first electrode pattern 21.

The second auxiliary electrode 63 may be formed on a region where the second electrode pattern 31 is formed. The second auxiliary electrode 63 may be formed at the edge of the second electrode pattern 31. The second auxiliary electrode 63 may be formed in an edge region of the second electrode pattern 31.

The third auxiliary electrode 65 may be formed on a region where the second electrode pattern 31 is formed. The third auxiliary electrode 65 may be formed in a central region of the second electrode pattern 31. The third auxiliary electrode 65 may be formed along a second direction, which is an arrangement direction of the second sensing electrodes 30. The third auxiliary electrode 65 may be formed in a direction crossing the bridge electrode 51.

The fourth auxiliary electrode 67 may be formed on a region where the first electrode pattern 21 is formed. The fourth auxiliary electrode 67 may be formed in a central region of the first electrode pattern 21. The fourth auxiliary electrode 67 may be formed along a second direction, which is an arrangement direction of the second sensing electrodes 30. [ The fourth auxiliary electrode 67 may be formed in a direction crossing the bridge electrode 51.

The fourth auxiliary electrode 67 may be electrically connected to the first electrode pattern 21. The fourth auxiliary electrode 67 may be electrically connected to the first electrode pattern 21 through a contact hole 71.

The fourth auxiliary electrode 67 may be electrically connected to the bridge electrode 51. The fourth auxiliary electrode 67 may be integrally formed and electrically connected to the bridge electrode 51. The fourth auxiliary electrode 67 may be electrically connected to the bridge electrode 51 through the contact hole 71, .

Also, the fourth auxiliary electrode 67 may be electrically connected to the first auxiliary electrode 61. The fourth auxiliary electrode 67 may be formed integrally with the first auxiliary electrode 51 and electrically connected to the fourth auxiliary electrode 67. The fourth auxiliary electrode 67 may be formed integrally with the first auxiliary electrode 51 and the contact hole 71 ). ≪ / RTI >

The fifth auxiliary electrode 69 may be formed on a region where the second electrode pattern 31 is formed. The fifth auxiliary electrode 69 may be formed in a central region of the second electrode pattern 31. The fifth auxiliary electrode 69 may be formed along a first direction which is an arrangement direction of the first sensing electrodes 20. [ The fifth auxiliary electrode 69 may be formed in a direction parallel to the bridge electrode 51.

The fifth auxiliary electrode 69 may be electrically connected to the second electrode pattern 31. The fifth auxiliary electrode 69 may be electrically connected to the second electrode pattern 31 through a contact hole 71.

The fifth auxiliary electrode 69 may be electrically connected to the second auxiliary electrode 63 and the third auxiliary electrode 65. The fifth auxiliary electrode 69 may be integrally formed and electrically connected to the second auxiliary electrode 63 and the third auxiliary electrode 65 and the fifth auxiliary electrode 69 may be electrically connected to the second auxiliary The electrode 63 and the third auxiliary electrode 65 through the contact hole.

The fourth auxiliary electrode 67 and the fifth auxiliary electrode 69 are formed on the first electrode pattern 21 and the second electrode pattern 31 respectively and are electrically connected to each other to serve as a path for transferring charges have. The charge can move through the fourth auxiliary electrode 67 and the fifth auxiliary electrode 69 and the resistance of the first sensing electrode 20 and the second sensing electrode 30 can be reduced. The resistance of the first sensing electrode 20 and the second sensing electrode 30 is reduced to attenuate the RC delay to prevent distortion of the signal, thereby improving the response speed and increasing the touch sensitivity.

18 is a perspective view of a display device to which a touch panel according to the first to fifth embodiments is applied.

Referring to FIG. 18, the display device 1000 may include an input button 1100 for inputting commands from the outside, a camera 1200 for capturing still images and moving images, and a speaker 1300 for outputting sounds.

The display device 1000 may include the touch panel 1 and a display panel (not shown) as described above. The touch panel 1 may be formed on the entire surface of the display panel (not shown). The display panel (not shown) may be attached to the touch panel 1.

The display panel (not shown) can display an image. The display panel (not shown) may be a liquid crystal display panel or an organic light emitting display panel, and may be applied to various products such as a mobile phone, a TV, and a navigation device.

The present invention is not limited to the display device, but may be applied to other devices such as a keypad, a touchpad for a notebook computer, A touch input device for a vehicle, and the like.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be apparent to those skilled in the art that such modifications or variations are within the scope of the appended claims.

1, 101, 201, 301:
10, 110, 210,
20, 120, 220, 320:
21, 121, 221, 321:
30, 130, 230, 330:
31, 131, 231, 331:
40, 140, 240, 340:
41, 141, 241, 341:
43, 143, 243, 343:
51, 151, 251, 351:
60, 160, 260, 360:
61, 161, 261, 361:
62: Connection pattern
63, 163, 263, 363:
65, 165, 265, 365:
70, 170, 270,
71, 171, 271, 371:

Claims (12)

A first sensing electrode including a plurality of first electrode patterns;
A second sensing electrode including a plurality of second electrode patterns;
A bridge electrode connecting the adjacent first electrode patterns; And
And an auxiliary electrode formed on the same layer as the bridge electrode and formed on at least one of the first electrode pattern and the second electrode pattern,
Touch panel.
The method according to claim 1,
The auxiliary electrode is formed in an edge region of the electrode pattern
Touch panel.
The method according to claim 1,
And an insulating layer formed between the bridge electrode and the second sensing electrode
Touch panel.
The method of claim 3,
Wherein the auxiliary electrode is formed on the insulating layer
Touch panel.
5. The method of claim 4,
The insulating layer is formed only in a region corresponding to a region where the auxiliary electrode and the bridge electrode are formed
Touch panel.
The method according to claim 1,
And the auxiliary electrode is formed on the second alignment axis of the second electrode pattern
Touch panel.
The method according to claim 1,
The auxiliary electrode is electrically connected to the electrode pattern
Touch panel.
8. The method of claim 7,
The auxiliary electrode is electrically connected to the electrode pattern through at least one contact hole
Touch panel.
The method according to claim 1,
And a dummy pattern positioned between the first electrode pattern and the second electrode pattern
Touch panel.
The method according to claim 1,
The first electrode pattern and the second electrode pattern may be rhombic
Touch panel.
The method according to claim 1,
The first electrode pattern and the second electrode pattern are bar-
Touch panel.
3. The method of claim 2,
The auxiliary electrode is formed at a predetermined distance from the outer boundary surface of the electrode pattern
Touch panel.

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