CN112688065B

CN112688065B - Antenna device and display device including the same

Info

Publication number: CN112688065B
Application number: CN202011109593.7A
Authority: CN
Inventors: 崔秉搢; 朴东必; 李元熙
Original assignee: Dongwoo Fine Chem Co Ltd
Current assignee: Dongwoo Fine Chem Co Ltd
Priority date: 2019-10-18
Filing date: 2020-10-16
Publication date: 2023-09-22
Anticipated expiration: 2040-10-16
Also published as: KR102380753B1; CN112688065A; KR20210046185A; CN213584167U; WO2021075865A1

Abstract

An antenna device according to an embodiment of the present application includes: a first electrode layer having a first mesh structure including first electrode lines and second electrode lines intersecting each other; a second electrode layer disposed at a level higher than the first electrode layer, the second electrode layer having a second mesh structure including third electrode lines and fourth electrode lines intersecting each other; and a contact region where an end portion of the first electrode layer and an end portion of the second electrode layer are electrically connected to each other. The second mesh structure and the first mesh structure are entirely overlapped in the contact area in a plan view.

Description

Antenna device and display device including the same

Cross Reference to Related Applications

The present application claims priority from korean patent application No. 10-2019-0129954 filed in the Korean Intellectual Property Office (KIPO) on 10 month 18 of 2019, the disclosure of which is incorporated herein by reference.

Technical Field

The present application relates to an antenna device and a display device including the same. More particularly, the present application relates to an antenna device including a radiation pattern and a feed line, and a display device including the antenna device.

Background

With the development of information technology, wireless communication technology such as Wi-Fi, bluetooth, etc. is combined with a display device in the form of, for example, a smart phone. In this case, the antenna may be combined with the display device to provide a communication function.

As mobile communication technology has been rapidly developed, an antenna capable of high frequency or ultra high frequency communication is required in a display device.

As the size of the display device becomes smaller, the antenna may be disposed at the display area of the display device. In this case, the user can visually recognize the conductive pattern included in the antenna, thereby causing degradation in image quality.

However, when the material or structure of the antenna is changed in order to reduce the visibility of the conductive pattern included in the antenna, the resistance of the conductive pattern may increase, resulting in a reduction in the radiation characteristics of the antenna.

Disclosure of Invention

According to one aspect of the present application, an antenna device having improved optical and electrical characteristics is provided.

According to one aspect of the present application, there is provided a display device including an antenna device having improved optical and electrical characteristics.

(1) An antenna device, comprising: a first electrode layer having a first mesh structure including first electrode lines and second electrode lines intersecting each other; a second electrode layer disposed at an upper level with respect to the first electrode layer height, the second electrode layer having a second mesh structure including third and fourth electrode lines intersecting each other; and a contact region where end portions of the first electrode layer and the second electrode layer are electrically connected to each other, wherein the second mesh structure and the first mesh structure are entirely overlapped in the contact region in a plan view.

(2) The antenna device according to the above (1), wherein the second mesh structure entirely covers the first mesh structure in the contact region in the plan view.

(3) The antenna device according to the above 2, wherein the contact region includes a second intersecting region where the third electrode line and the fourth electrode line meet each other, and a first intersecting region where the first electrode line and the second electrode line meet each other, wherein the first intersecting region is entirely covered by the second intersecting region in the plan view.

(4) The antenna device according to the above (3), wherein the third electrode line includes a third enlarged portion having an increased width and extending from the second intersection region in the contact region, and the fourth electrode line includes a fourth enlarged portion having an increased width and extending from the second intersection region in the contact region.

(5) The antenna device according to the above (4), wherein the first electrode line is entirely covered by the third enlarged portion in the contact region, and the second electrode line is entirely covered by the fourth enlarged portion in the contact region.

(6) The antenna device according to the above (4), wherein the third enlarged portion and the fourth enlarged portion further extend to the outside of the contact area.

(7) The antenna device according to the above (3), wherein each of the third electrode line and the fourth electrode line has an increased width in the entire contact region.

(8) The antenna device according to the above (7), wherein the first electrode line includes a first extension portion protruding from the first intersecting region in the contact region, and the second electrode line includes a second extension portion protruding from the first intersecting region in the contact region.

(9) The antenna device according to the above (8), wherein in the plan view, the first extension portion is entirely covered by the third electrode line, and the second extension portion is entirely covered by the fourth electrode line.

(10) The antenna device according to the above (1), wherein the first electrode layer includes a transmission line, and the second electrode layer includes a radiation pattern.

(11) The antenna device according to the above (10), wherein the radiation pattern has a stacked structure including a transparent conductive oxide layer and a metal layer, and the transmission line is composed of the metal layer.

(12) The antenna device according to the above (11), wherein the radiation pattern has a sequential stacked structure including a first transparent conductive oxide layer, the metal layer, and a second transparent conductive oxide layer.

(13) The antenna device according to the above (11), further comprising a signal pad connected to an end of the transmission line and having a three-dimensional metal pattern structure (solid metal pattern structure).

(14) The antenna device according to the above (13), further comprising a ground pad provided around the signal pad and separated from the transmission line and the signal pad.

(15) The antenna device according to the above (14), wherein the ground pad includes a first portion having a mesh structure and a second portion having a three-dimensional metal pattern.

(16) A display device comprising an antenna device according to the embodiments described above.

According to an embodiment of the present application, the first electrode layer including the transmission line and the second electrode layer including the radiation pattern may be disposed at different layers to be electrically connected to each other through the contact region. In the contact region, the electrode line positioned at the upper level may be formed to be wider, thereby preventing etching damage to the electrode line positioned at the lower level while increasing the contact area.

Therefore, the resistance in the contact region can be reduced, and the radiation characteristic of the antenna can be improved.

In some embodiments, the radiation pattern may include a transparent conductive oxide layer to have improved transparency, and the transmission line may be formed of a metal layer to reduce a feeding resistance. Thus, an antenna device having improved transparency and low resistance can be realized.

Drawings

Fig. 1 is a schematic cross-sectional view illustrating an antenna device according to an exemplary embodiment.

Fig. 2 is a schematic top plan view illustrating an antenna device according to an exemplary embodiment.

Fig. 3 is a schematic top plan view illustrating an antenna arrangement according to some exemplary embodiments.

Fig. 4 is a partial enlarged top plan view showing the shape and configuration of an electrode line in a contact region according to an exemplary embodiment.

Fig. 5 is a partial enlarged top plan view illustrating the shape and configuration of electrode wires in a contact region according to some example embodiments.

Fig. 6 is a partially enlarged top plan view showing the shape and arrangement of electrode lines in contact areas according to a comparative example.

Fig. 7 is a schematic top plan view illustrating a display device according to an exemplary embodiment.

Detailed Description

According to an exemplary embodiment of the present application, an antenna device is provided, which includes a radiation pattern and a transmission line, which may have a mesh structure, and may be disposed at different layers or different levels to be electrically connected to each other.

The antenna device may be a microstrip patch antenna, for example, manufactured in the form of a transparent film. The antenna device may be applied to a communication device for mobile communication of a high or ultra-high frequency band (e.g., 3G, 4G, 5G, or higher).

According to an exemplary embodiment of the present application, there is also provided a display device including an antenna device. However, the application of the antenna device is not limited to the display device, and the antenna device may be applied to various objects or structures, such as a vehicle, a home appliance, a building, and the like.

The terms "first," "second," "upper," and "lower" as used herein are not intended to specify an absolute position or orientation, but rather are used to indicate a relative position and orientation or to indicate different elements.

Referring to fig. 1, the antenna device may include a lower insulating layer 90, an insulating interlayer 120, a first electrode layer 100, and a second electrode layer 140.

The lower insulating layer 90 may serve as a base layer or a substrate layer for forming the first electrode layer 100, for example. The insulating interlayer 120 may serve as an intermediate layer for separating the first electrode layer 100 and the second electrode layer 140 at different level heights.

The lower insulating layer 90 and/or the interlayer insulating layer 120 may serve as a dielectric layer of the antenna device. For example, the lower insulating layer 90 and/or the interlayer insulating layer 120 may include: polyester-based resins such as polyethylene terephthalate, polyethylene isophthalate, polyethylene naphthalate, and polybutylene terephthalate; cellulose-based resins such as diacetyl cellulose and triacetyl cellulose; a polycarbonate-based resin; acrylic resins such as polymethyl (meth) acrylate and polyethyl (meth) acrylate; styrene-based resins such as polystyrene and acrylonitrile-styrene copolymer; polyolefin-based resins such as polyethylene, polypropylene, cycloolefin or polyolefin having a norbornene structure and ethylene-propylene copolymer; a vinyl chloride-based resin; amide-based resins such as nylon and aramid; an imide-based resin; polyether sulfone-based resins; a sulfone-based resin; polyether-ether-ketone-based resin; polyphenylene sulfide resin; a vinyl alcohol-based resin; vinylidene chloride resin; vinyl butyral based resins; allyl salt-based resins; a polyoxymethylene-based resin; an epoxy-based resin; urethane or acrylic urethane-based resins; silicone, and the like. These may be used alone or in combination of two or more thereof.

In some embodiments, an adhesive film such as solid transparent optical adhesive (OCA), optically transparent resin (OCR), or the like may be included in the lower insulating layer 90 and/or the interlayer insulating layer 120.

A capacitance or inductance may be formed by the lower insulating layer 90 and/or the insulating interlayer 120 so that a frequency band at which the antenna device may be driven or operated may be adjusted. In some embodiments, the dielectric constant of the lower insulating layer 90 and/or the insulating interlayer 120 may be adjusted in the range of about 1.5 to about 12, preferably in the range of about 2 to about 12. If the dielectric constant exceeds about 12, the driving frequency may be excessively lowered, resulting in that the desired driving of high frequency or ultra-high frequency band may not be achieved.

In some embodiments, an insulating layer (e.g., an encapsulation layer, a passivation layer, etc. of a display panel) located inside a display device in which the antenna device is applied may be used as the lower insulating layer 90.

The first electrode layer 100 may be formed on the lower insulating layer 90. The first electrode layer 100 may include silver (Ag), gold (Au), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), chromium (Cr), titanium (Ti), tungsten (W), niobium (Nb), tantalum (Ta), vanadium (V), iron (Fe), manganese (Mn), cobalt (Co), nickel (Ni), zinc (Zn), tin (Sn), molybdenum (Mo), calcium (Ca), or an alloy including at least one thereof. These may be used alone or in combination thereof.

In one embodiment, the first electrode layer 100 may include silver (Ag) or a silver alloy (e.g., silver-palladium-copper (APC) alloy), or copper (Cu) or a copper alloy (e.g., copper-calcium (CuCa) alloy) in view of low resistance and a fine line width pattern.

In some embodiments, as described below with reference to fig. 2, the first electrode layer 100 may include a transmission line 112 and a signal pad 114 of an antenna device. In this case, the first electrode layer 100 may have a single-layer structure formed of the above-described metal or alloy.

An insulating interlayer 120 may be formed on the lower insulating layer 90 to cover the first electrode layer 100.

The second electrode layer 140 may be formed on the insulating interlayer 120. In some embodiments, the second electrode layer 140 may include a radiation pattern 150, as described below with reference to fig. 2.

In this case, the second electrode layer 140 may include a transparent conductive oxide such as Indium Tin Oxide (ITO), indium Zinc Oxide (IZO), zinc oxide (ZnOx), indium Zinc Tin Oxide (IZTO), tin oxide (SnOx). For example, the second electrode layer 140 may have a stacked structure having a transparent conductive oxide layer and a metal layer including the above-described metal or alloy.

In one embodiment, the second electrode layer 140 may include, for example, a first transparent conductive oxide layer 143, a metal layer 145, and a second transparent conductive oxide layer 147 sequentially stacked from the insulating interlayer 120, as shown in fig. 1.

The flexibility of the second electrode layer 140 may be improved by the metal layer 145, and the signal transmission speed may also be improved by the low resistance of the metal layer 145. In addition, the metal layer 145 may be sandwiched between the transparent conductive oxide layers 143 and 147, so that corrosion resistance and transparency of the second electrode layer 140 may be improved.

The first electrode layer 100 and the second electrode layer 140 may be electrically connected to each other. In an exemplary embodiment, the first electrode layer 100 and the second electrode layer 140 may be electrically connected to each other through the contact 130 formed in the insulating interlayer 120.

For example, a contact hole or a contact region partially exposing the top surface of the first electrode layer 100 may be formed in the insulating interlayer 120, and a conductive layer for forming the second electrode layer 140 may be formed on the top surface of the insulating interlayer 120. The conductive layer may fill the contact hole or the contact region to form the contact 130. In this case, the contact 130 may be substantially integrally connected to the second electrode layer 140 to be provided as a single member.

In some embodiments, a protective layer 160 covering the second electrode layer 140 may be formed on the insulating interlayer 120. The protective layer 160 may include, for example, an inorganic insulating material (such as silicon oxide, silicon oxynitride, silicon nitride, or the like), an organic insulating material (such as an acrylic resin or a siloxane resin), or an organic/inorganic composite insulating film.

Fig. 2 is a schematic top plan view illustrating an antenna device according to an exemplary embodiment. For convenience of description, the illustration of the insulating interlayer 120 is omitted here.

Referring to fig. 2, as described above, the second electrode layer 140 may include the radiation pattern 150, and the first electrode layer 100 may include the transmission line 112. In some embodiments, the radiation pattern 150 may be formed on the insulating interlayer 120, and may be disposed at an upper level of the transmission line 112.

In an exemplary embodiment, the radiation pattern 150 and the transmission line 112 may include a mesh structure. For example, the mesh structure may include electrode lines intersecting each other in the mesh structure.

As shown in fig. 2, the lower insulating layer 90 or the top surface of the antenna device may be divided into a viewing area VA and a bonding area BA. For example, the viewing area VA may be included in a display area of a display device to which the antenna device is applied.

In the bonding area BA, the antenna device and an antenna driving Integrated Circuit (IC) chip may be combined or connected. For example, the bonding area BA may be included in a peripheral area or a bezel area of the display device.

According to the embodiment shown in fig. 2, the radiation pattern 150 and the transmission line 112 may be disposed on the viewing area VA. Accordingly, the radiation pattern 150 and the transmission line 112 may be formed to include a mesh structure to improve transmittance in the viewing area VA.

The radiation pattern 150 and the transmission line 112 may be electrically connected to each other through the contact region 135. For example, a contact 130 may be formed in the contact region 135 between an electrode line of a mesh structure (e.g., a second mesh structure) located on one side of the radiation pattern 150 and an electrode line of a mesh structure (e.g., a first mesh structure) located at one end of the transmission line 112.

The signal pads 114 may be connected to terminals of the transmission line 112. As described above, the signal pads 114 may be disposed in the bonding area BA, and may serve as connection pads to the antenna driving IC chip.

For example, the signal pad 114 and the antenna driving IC chip may be bonded to each other through a circuit intermediate structure such as a Flexible Printed Circuit Board (FPCB) and an Anisotropic Conductive Film (ACF).

The signal pad 114 may be formed in a stereoscopic pattern including the above-described metal or alloy to reduce a feeding resistance. In one embodiment, the signal pad 114 may be used as a single member that is substantially integrally connected to the terminal portion of the transmission line 112.

In some embodiments, the first electrode layer 100 may further include a ground pad 115 disposed around the signal pad 114. For example, as shown in fig. 2, a pair of ground pads 115 may face each other with a signal pad 114 interposed therebetween while being electrically and physically separated from the transmission line 112 and the signal pad 114.

In some embodiments, the ground pad 115 may include a first portion 111 having a mesh structure (e.g., a first mesh structure), and a second portion 113 having a three-dimensional pattern structure.

The first portion 111 may be positioned on the viewing area VA together with, for example, the transmission line 112. The second portion 113 may be disposed on the bonding area BA together with the signal pad 114.

As described above, as shown in fig. 1, the radiation pattern 150 may have a three-layer structure including, for example, the first transparent conductive oxide layer 143, the metal layer 145, and the second transparent conductive oxide layer 147. Accordingly, the transmittance of the radiation pattern 150 may be improved to prevent the electrode visibility and image quality from being deteriorated in the viewing area VA.

For example, the transmission line 112 may be formed to include only a metal layer (e.g., a metal mesh layer), thereby reducing a feeding resistance. The signal pad 114 and the ground pad 115 may also include only a metal layer.

The length or area of the transmission line 112 and the signal pad 114 may be adjusted according to the length or area of the viewing area VA and the bonding area BA.

Fig. 3 is a schematic top plan view illustrating an antenna arrangement according to some exemplary embodiments. A detailed description of configurations, structures and materials substantially the same or similar to those described with reference to fig. 2 is omitted herein.

Referring to fig. 3, a protrusion 150a extending from the radiation pattern 150 toward the transmission line 112 may be formed. The protrusion 150a may be integrally connected with the radiation pattern 150, and may include the same material and structure as those of the radiation pattern 150.

An end portion of the protrusion 150a may be electrically connected to one end of the transmission line 112 via the contact region 135.

Fig. 4 is a partial enlarged top plan view showing the shape and configuration of electrode lines in a contact region according to an exemplary embodiment.

Referring to fig. 4, as described above, a portion of the second mesh structure at one side of the radiation pattern 150 in the contact region 135 and a portion of the first mesh structure at one end of the transmission line 112 may be electrically connected to each other.

For example, the first mesh structure may include first electrode lines 101 and second electrode lines 103 intersecting each other. The second mesh structure may include third and fourth electrode lines 151 and 153 crossing each other.

The first electrode line 101 and the third electrode line 151 may extend in substantially the same direction, and the second electrode line 103 and the fourth electrode line 153 may extend in substantially the same direction.

The contact region 135 may include an intersection region in which electrode lines meet each other. For example, when the first intersection region 105 of the first mesh structure and the second intersection region 155 of the second mesh structure are observed or projected in a plan view, the first intersection region 105 and the second intersection region 155 may overlap each other within the contact region 135.

In an exemplary embodiment, the first mesh structure and the second mesh structure may completely overlap each other in the contact region 135 in a plan view. The term "fully overlapped" as used herein may indicate a structure in which one of the first and second mesh structures is fully covered by the other mesh structure.

The mesh structures may be aligned to overlap entirely in the contact region 135 so that alignment of the upper mesh structure may be easily achieved. Furthermore, a sufficient contact area can be obtained in the contact region 135.

In some embodiments, in the contact region 135, the first mesh structure of the transmission line 112 at the lower level may be completely covered by the second mesh structure of the radiation pattern 150 at the upper level.

For example, the third electrode line 151 may include a third enlarged portion 151a extending from the second intersection region 155 in the direction of the first electrode line 101 and having an increased width. The fourth electrode line 153 may include a fourth enlarged portion 153a extending from the second intersection region 155 in the direction of the second electrode line 103 and having an increased width.

In the contact region 135, the third enlarged portion 151a may have a width larger than that of the first electrode line 101, and may substantially entirely cover the first electrode line 101 in a plan view. The fourth enlarged portion 153a may have a width greater than that of the second electrode line 103 and may substantially entirely cover the second electrode line 101 in a plan view.

As described above, the electrode lines 101 and 103 of the first mesh structure located at the lower level may be entirely covered by the electrode lines 151 and 153 of the second mesh structure located at the upper level in the contact region 135. Accordingly, when the conductive layer for forming the second mesh structure is etched to form the radiation pattern 150 and the contact 130, damage of the transmission line 112 due to exposure of the first mesh structure can be prevented.

In addition, in the contact region 135, the electrode lines 151 and 153 of the second mesh structure may include an enlarged portion, so that contact resistance may be reduced. Further, electrical contact may be made between the intersecting regions 105 and 155 where the electrode lines meet in the contact region 135, so that the contact area may be increased to reduce the contact resistance or the feeding resistance.

In some embodiments, the third and fourth enlarged portions 151a and 153a may additionally extend outside of the contact region 135 to further reduce contact resistance or feed resistance.

Fig. 5 is a partial enlarged top plan view illustrating the shape and arrangement of electrode wires in a contact region according to some example embodiments.

Referring to fig. 5, the portions of the electrode lines 151 and 153 of the second mesh structure in the contact region 135 may have an overall increased width as compared to the portions outside the contact region 135.

In this case, the electrode lines 101 and 103 of the first mesh structure at the lower level may include extension portions 101a and 103a protruding from the first intersection region 105. For example, the first electrode line 101 may include a first extension portion 101a protruding from the first intersection region 105 in the direction of the third electrode line 151 in the contact region 135. The second electrode line 103 may include a second extension portion 103a protruding from the first intersection region 105 in the direction of the fourth electrode line 153 in the contact region 135.

Both the first extension portion 101a and the second extension portion 103a may be covered by the enlarged electrode wire included in the second mesh structure.

In the embodiment of fig. 1-5, the radiation pattern 150 may be disposed on the transmission line 112. However, the radiation pattern 150 may be formed under the transmission line 112, and the contact 130 with the radiation pattern 150 may be formed simultaneously with the formation of the transmission line 112. For example, in fig. 1, the positions of the first electrode layer 100 and the second electrode layer 140 may be changed.

In this case, the electrode line included in the transmission line 112 may include an enlarged portion in the contact region 135 and substantially entirely cover the electrode line included in the radiation pattern 150 in a plan view.

In fig. 4 and 5, the contact area 135 is shown as circular. However, the shape of the contact region 135 may be appropriately changed to, for example, square, hexagonal, octagonal, etc., in consideration of the etching process.

Referring to fig. 6, in the contact region 135 of the comparative example, the first crossing region 105 in which the first electrode line 101 and the second electrode line 103 of the first mesh structure meet each other and the second crossing region 155 in which the third electrode line 151 and the fourth electrode line 153 of the second mesh structure meet each other may overlap each other with the same size. Specifically, the first to fourth electrode lines 101, 103, 151, and 153 may have the same width in the contact region 135.

In this case, the first electrode line 101 and the second electrode line 103 in the contact region 135 may be exposed and etched together while performing the etching process of the second mesh structure positioned at the upper level. Accordingly, the feeding resistance through the transmission line 112 can be increased, and disconnection may occur.

However, according to the above-described exemplary embodiment, by forming the enlarged portion having the increased width in the second mesh structure, the first mesh structure may not be exposed during the etching process, so that etching damage of the transmission line 112 may be prevented. Additionally, the contact area may be increased by increasing the portion to further reduce the feeding resistance.

Fig. 7 is a schematic top plan view illustrating a display device according to an exemplary embodiment. For example, fig. 7 shows an outline of a display device including a window.

Referring to fig. 7, the display device 200 may include a display area 210 and a peripheral area 220. The peripheral region 220 may be disposed on both lateral portions and/or both end portions of the display region 210. The peripheral region 220 may correspond to, for example, a light shielding portion or a frame portion of the image display apparatus.

The antenna device described above may be disposed in the entire display region 210 and the peripheral region 220 of the display device 200. For example, the visible area VA of the antenna device shown in fig. 2 may be included in the display area 210, and the coupling area BA of the antenna device may be included in the peripheral area 220.

In this case, the radiation pattern 150 may be configured in the display region 210. As described above, by adopting the mesh structure, the radiation pattern 150 can be prevented from being visually recognized by the user. Additionally, the transmittance of the radiation pattern 150 may be increased by the transparent conductive oxide layer to prevent degradation of image quality in the display region 210.

At least a portion of the transmission line 112 may further include a mesh structure, and the signal pad 114 may be connected to an antenna driving IC chip in the peripheral region 220. The signal pads 114 may include a bump metal pattern to reduce the overlap resistance and the feed resistance.

By the combination of the structure and the material of the antenna device as described above, antenna driving with improved electrical characteristics and optical characteristics can be achieved in the display device 200.

Claims

1. An antenna device, comprising:

a first electrode layer having a first mesh structure including first electrode lines and second electrode lines intersecting each other;

a second electrode layer disposed at an upper level with respect to the first electrode layer, the second electrode layer having a second mesh structure including third and fourth electrode lines intersecting each other; and

a contact region where an end portion of the first electrode layer and an end portion of the second electrode layer are electrically connected to each other,

wherein the second mesh structure and the first mesh structure completely overlap in a plan view in the contact area, and the second mesh structure completely covers the first mesh structure in the plan view in the contact area,

wherein the contact region includes a first intersection region and a second intersection region, the third electrode line and the fourth electrode line meet each other at the second intersection region, and the first electrode line and the second electrode line meet each other at the first intersection region,

wherein the first intersection region is completely covered by the second intersection region in the plan view.

2. The antenna device according to claim 1, wherein the third electrode line comprises a third enlarged portion having an increased width in the contact region and extending from the second intersection region, and the fourth electrode line comprises a fourth enlarged portion having an increased width in the contact region and extending from the second intersection region.

3. The antenna device according to claim 2, wherein the first electrode line is completely covered by the third enlarged portion in the contact region, and the second electrode line is completely covered by the fourth enlarged portion in the contact region.

4. The antenna device according to claim 2, wherein the third enlarged portion and the fourth enlarged portion further extend outside the contact area.

5. The antenna device according to claim 1, wherein each of the third electrode line and the fourth electrode line has an increased width throughout the contact region.

6. The antenna device according to claim 5, wherein the first electrode line comprises a first extension protruding from the first intersection region in the contact region, and the second electrode line comprises a second extension protruding from the first intersection region in the contact region.

7. The antenna device according to claim 6, wherein in the plan view, the first extension portion is entirely covered by the third electrode line, and the second extension portion is entirely covered by the fourth electrode line.

8. The antenna device according to claim 1, wherein the first electrode layer comprises a transmission line and the second electrode layer comprises a radiation pattern.

9. The antenna device according to claim 8, wherein the radiation pattern has a stacked structure including a transparent conductive oxide layer and a metal layer, and the transmission line is composed of the metal layer.

10. The antenna device according to claim 9, wherein the radiation pattern has a sequential stack structure including a first transparent conductive oxide layer, the metal layer, and a second transparent conductive oxide layer.

11. The antenna device of claim 9, further comprising a signal pad connected to an end of the transmission line and having a three-dimensional metal pattern structure.

12. The antenna device of claim 11, further comprising a ground pad disposed around the signal pad and separate from the transmission line and the signal pad.

13. The antenna device of claim 12, wherein the ground pad comprises a first portion having a mesh structure and a second portion having a solid metal pattern.

14. A display device comprising the antenna device according to claim 1.