KR20220099840A - Antenna device and display device including the same - Google Patents

Abstract

According to embodiments of the present invention, an antenna device includes: a dielectric layer comprising an upper dielectric layer, a side dielectric layer integrally connected to the upper dielectric layer on one side, and a lower dielectric layer integrally connected to the other side of the side dielectric layer; and an antenna pattern which has a structure which continuously extends and bends on the upper dielectric layer, the side dielectric layer, and the lower dielectric layer, and includes a first radiation pattern disposed on the upper dielectric layer, a second radiation pattern disposed on the side dielectric layer, and a third radiation pattern disposed on the lower dielectric layer. The present invention provides an antenna device having improved gain and signal transmission/reception efficiency.

Description

Antenna element and display device including the same

The present invention relates to an antenna element and a display device including the same. More particularly, it relates to an antenna element including a dielectric layer and an antenna pattern, and a display device including the same.

With the recent development of an information society, wireless communication technologies such as Wi-Fi and Bluetooth are combined with a display device and implemented in the form of, for example, a smart phone. In this case, an antenna may be coupled to the display device to perform a communication function.

As mobile communication technology evolves in recent years, an antenna for performing communication in a high frequency or very high frequency band needs to be coupled to the display device. In addition, as the display device on which the antenna is mounted becomes thinner and lighter, the space occupied by the antenna may also be reduced. Therefore, there is a limit to simultaneously realizing high frequency and wideband signal transmission and reception in a limited space. For example, in the case of communication in the high-frequency band of 5G recently, as the wavelength becomes shorter, signal transmission/reception may be blocked, and it may be necessary to implement multi-axis signal transmission/reception in order to reduce signal loss.

In addition, when the antenna is applied in the form of a thin display device film or patch, it is not easy to secure radiation reliability in the above-described high frequency or ultra high frequency communication.

For example, Korean Patent Application Laid-Open No. 2016-0059291 discloses an antenna integrated into a display panel, but it may not be sufficient to secure sufficient high-frequency radiation reliability within a limited space.

Korea Patent Publication No. 2016-0059291

An object of the present invention is to provide an antenna element having improved gain and signal transmission/reception efficiency.

An object of the present invention is to provide a display device including an antenna element having improved gain and signal transmission/reception efficiency.

1. A dielectric layer comprising an upper dielectric layer, a side dielectric layer integrally connected with the upper dielectric layer on one side, and a lower dielectric layer integrally connected with the other side of the side dielectric layer; and a first radiation pattern disposed on the upper dielectric layer, a second radiation pattern disposed on the side dielectric layer, and a lower dielectric layer having a structure continuously extending and bent over the upper dielectric layer, the side dielectric layer, and the lower dielectric layer. An antenna element comprising an antenna pattern comprising a third radiation pattern disposed thereon.

2. The antenna element according to the above 1, wherein the side dielectric layer has a curved or bent shape.

3. The antenna element according to 1 above, wherein the first radiation pattern has a mesh structure.

4. The antenna element according to the above 3, wherein the first radiation pattern further comprises a dummy mesh pattern arranged to be spaced apart from the first radiation pattern on the periphery.

5. The antenna element according to 1 above, wherein at least one of the second radiation pattern and the third radiation pattern has a solid structure.

6. The antenna element according to the above 1, wherein at least one of the first radiation pattern, the second radiation pattern, and the third radiation pattern has a different resonance frequency.

7. The antenna element according to the above 6, wherein resonant frequencies of all of the first radiation pattern, the second radiation pattern, and the third radiation pattern are different from each other.

8. The method of 1 above, wherein the antenna pattern comprises: a first transmission line extending between the first radiation pattern and the second radiation pattern; a second transmission line extending between the second radiation pattern and the third radiation pattern; a third transmission line branching and extending from the third radiation pattern; and a signal pad connected to an end of the third transmission line.

9. The antenna element according to 8 above, wherein at least one of the first transmission line, the second transmission line, and the third transmission line has a solid structure.

10. The antenna element according to 8 above, wherein the antenna pattern further includes a ground pad disposed to be spaced apart from the third transmission line and the signal pad in the vicinity of the signal pad.

11. The antenna element of 1 above, further comprising a ground pattern disposed inside the side dielectric layer and disposed with the second radiation pattern and the side dielectric layer interposed therebetween.

12. The antenna element according to the above 1, wherein the plurality of antenna patterns are physically spaced apart from each other and arranged in an array form along the width direction.

13. The method of 12 above, wherein the first radiation patterns included in the plurality of antenna patterns on the dielectric layer are arranged along the width direction on the upper dielectric layer, and the second radiation patterns included in the plurality of antenna patterns are arranged on the upper dielectric layer. patterns are arranged along the width direction on the side dielectric layer, and the third radiation patterns included in the plurality of antenna patterns are arranged along the width direction on the lower dielectric layer.

14. The above 1, wherein the dielectric layer is a planar preliminary dielectric layer including a first region, a second region, and a third region, and the second region is bent so that a bottom surface of the first region and a bottom surface of the third region The antenna element is formed by being folded to face each other, and the surface of the second region of the preliminary dielectric layer corresponds to the side dielectric layer.

15. The antenna element according to the above 14, wherein the upper dielectric layer is disposed on an electrode structure included in the display panel, and the electrode structure is provided as a ground layer of the antenna pattern.

16. A display device comprising the antenna element according to 1 above.

An antenna element according to embodiments of the present invention may include a dielectric layer including an upper dielectric layer, a side dielectric layer, and a lower dielectric layer, and an antenna pattern including radiation patterns disposed on the upper dielectric layer, the side dielectric layer, and the lower dielectric layer, respectively. Accordingly, double polarization or multi-axis signal transmission/reception can be implemented in a limited space, and high-frequency, ultra-high parking, and wideband signal transmission and reception can be simultaneously implemented.

The first radiation pattern positioned on the upper dielectric layer of the antenna element according to some embodiments may have a mesh structure, and the second and third radiation patterns positioned on the side dielectric layer and the lower dielectric layer may have a solid structure. have. Accordingly, it is possible to secure excellent signal efficiency and antenna gain characteristics while preventing the display user from seeing the antenna pattern.

The antenna element according to some embodiments may include a plurality of antenna patterns arranged in an array form. In this case, the first radiation patterns may be arranged along the width direction on the upper dielectric layer, the second radiation patterns may be arranged along the width direction on the side dielectric layer, and the third radiation patterns may be arranged along the width direction on the lower dielectric layer. Accordingly, radiation interference or signal interference between radiation patterns having different resonant frequencies may be suppressed to improve radiation reliability and directivity at a frequency of a desired band.

1 and 2 are schematic side views and cross-sectional views illustrating antenna elements according to exemplary embodiments.
3 is a plan view illustrating an antenna element in a planar state before being bent in exemplary embodiments.
4 is a schematic cross-sectional view illustrating an antenna element according to some exemplary embodiments.
5 is a cross-sectional view illustrating an antenna element in a planar state before being bent in some exemplary embodiments.
6 is a plan view illustrating an antenna element in a planar state before being bent in some exemplary embodiments.
7 is a schematic cross-sectional view illustrating an antenna element according to some exemplary embodiments.
8 and 9 are schematic plan views for explaining a display apparatus according to example embodiments.

Embodiments of the present invention provide an antenna element including an antenna pattern including a plurality of radiation patterns.

The antenna element may be, for example, a microstrip patch antenna manufactured in the form of a transparent film. The antenna element may be applied to, for example, a communication device for mobile communication in a high-frequency or ultra-high frequency band (eg, 3G, 4G, 5G or higher). However, the use of the antenna element is not limited to a display device, and the antenna element may be applied to various structures such as vehicles, home appliances, and buildings.

In addition, embodiments of the present invention provide a display device including the antenna element.

Hereinafter, with reference to the drawings, embodiments of the present invention will be described in more detail. However, the following drawings attached to the present specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the above-described content of the present invention, so the present invention is described in such drawings It should not be construed as being limited only to the matters.

1 and 2 are schematic side views and cross-sectional views illustrating antenna elements according to exemplary embodiments.

1 and 2 , two directions parallel to the upper surface of the upper dielectric layer 100a and intersecting each other are defined as a first direction and a second direction. For example, the first direction and the second direction may cross each other perpendicularly. A direction perpendicular to the top surface of the upper dielectric layer 100a is defined as a third direction. For example, the first direction may correspond to a width direction of the antenna element, the second direction may correspond to a length direction of the antenna element, and the third direction may correspond to a thickness direction of the antenna element. The definition of the direction may be equally applied to the remaining drawings.

Referring to FIG. 1 , an antenna element according to exemplary embodiments includes a dielectric layer 100 , and an antenna pattern including a first radiation pattern 110 , a second radiation pattern 120 , and a third radiation pattern 130 . may include

The dielectric layer 100 may include an upper dielectric layer 100a, a side dielectric layer 100b integrally connected with the upper dielectric layer on one side, and a lower dielectric layer 100c integrally connected with the other side of the side dielectric layer.

For example, the upper dielectric layer 100a, the side dielectric layer 100b, and the lower dielectric layer 100c are each included in the dielectric layer 100 as one region of one dielectric layer 100 and are integrally formed, and in the dielectric layer 100 The region disposed on the upper surface of the display panel is defined as the upper dielectric layer 100a, the region disposed on the side surface of the display panel is defined as the side dielectric layer 100b, and the region disposed on the lower surface of the display panel is defined as the lower dielectric layer 100c, respectively. can do.

For example, FIG. 1 is a side view of the side dielectric layer 100b viewed from the second direction.

The side dielectric layer 100b of the dielectric layer 100 may have a curved or bent shape.

The dielectric layer 100 may include an insulating material having a predetermined dielectric constant. For example, it may include a transparent resin material having flexibility to be folded. For example, the dielectric layer 100 may include a polyester-based resin such as polyethylene terephthalate, polyethylene isophthalate, polyethylene naphthalate, and polybutylene terephthalate; Cellulose resins, such as a diacetyl cellulose and a triacetyl cellulose; polycarbonate-based resin; acrylic resins such as polymethyl (meth)acrylate and polyethyl (meth)acrylate; styrenic resins such as polystyrene and acrylonitrile-styrene copolymer; polyolefin-based resins such as polyethylene, polypropylene, polyolefin having a cyclo-based or norbornene structure, and an ethylene-propylene copolymer; vinyl chloride-based resin; amide-based resins such as nylon and aromatic polyamide; imide-based resin; polyether sulfone-based resin; sulfone-based resins; polyether ether ketone resin; sulfide polyphenylene-based resin; vinyl alcohol-based resin; vinylidene chloride-based resin; vinyl butyral-based resin; allylate-based resin; polyoxymethylene-based resins; epoxy resin; urethane-based or acrylic urethane-based resin; and silicone-based resins. These may be used alone or in combination of two or more.

In some embodiments, an adhesive film such as an optically clear adhesive (OCA), an optically clear resin (OCR), etc. may also be included in the dielectric layer 100 .

In some embodiments, the dielectric layer 100 may include an inorganic insulating material such as glass, silicon oxide, silicon nitride, silicon oxynitride, or the like.

In some embodiments, the dielectric constant of the dielectric layer 100 may be adjusted in the range of about 1.5 to 12. When the dielectric constant exceeds about 12, signal loss of the transmission line is excessively increased, and signal sensitivity and signal efficiency may decrease during high frequency or ultra high frequency band communication.

The radiation patterns 110 , 120 , and 130 may have, for example, a polygonal plate shape as shown in FIG. 1 . The shapes of the radiation patterns 110 , 120 , and 130 shown in FIG. 1 are exemplary and may be appropriately changed in consideration of radiation efficiency and the like.

In some embodiments, the radiation patterns 110 , 120 , and 130 may have a mesh structure or a solid structure.

For example, the first radiation pattern 110 positioned on the upper dielectric layer 100 may have a mesh structure. In this case, the transmittance of the antenna pattern on the display may be increased. Accordingly, it is possible to prevent the antenna pattern from being recognized by the user of the display device to which the antenna element is applied.

For example, at least one of the second and third radiation patterns 120 and 130 may have a hollow structure. In this case, since the second and third radiation patterns 120 and 130 are disposed on the side and lower surfaces of the display, the antenna radiation performance can be improved without fear of being recognized by the display user. Accordingly, an antenna gain characteristic in a high frequency band may be improved.

For example, one of the second and third radiation patterns 120 and 130 may have a mesh structure, and the other may have a hollow structure.

In some embodiments, the first radiation pattern 110 disposed on the display has a mesh structure, and the second and third radiation patterns 120 and 130 disposed on the side surface and lower surface of the display have a solid structure. can be formed

In this case, it is possible to secure excellent antenna radiation characteristics and antenna gain while preventing external visibility of the antenna element.

FIG. 2 is a cross-sectional view taken along line I-I' shown in FIG. 1 .

Referring to FIG. 2 , the antenna pattern includes a first transmission line 115 extending between a first radiation pattern 110 and a second radiation pattern 120 , a second radiation pattern 120 , and a third radiation pattern ( 130), a second transmission line 125 extending between, a third transmission line 135 branching and extending from the third radiation pattern 130, and a signal pad 140 connected to an end of the third transmission line 135. ) may be further included.

In exemplary embodiments, as shown in FIGS. 1 and 2 , the first radiation pattern 110 of the antenna pattern is disposed on the upper dielectric layer 100a, and the first transmission line 115 is the first It may branch from one side of the radiation pattern 110 and extend along the profile of the side dielectric layer 100b.

In some embodiments, the second radiation pattern 120 may be disposed on the side dielectric layer 100b and may be connected to an end of the first transmission line 115 . The second transmission line 125 may branch from one side of the second radiation pattern 120 and extend along the profile of the side dielectric layer 100b.

Accordingly, the radiation coverage of the antenna pattern may be further expanded through the curved second radiation pattern 120 , and multi-axial radiation characteristics may be substantially implemented.

For example, the third radiation pattern 130 may be disposed on the lower dielectric layer 100c and connected to an end of the second transmission line 125 . The third transmission line 135 may be branched from one side of the third radiation pattern 130 and extend on the lower dielectric layer 100c.

Accordingly, the third radiation pattern 130 may be utilized by patterning the conductive member of the mobile device to which the antenna element is applied. For example, the metal coating layer included in the back cover of the mobile device may be patterned to be utilized as the third radiation pattern 130 . Accordingly, the space occupied by the antenna element can be reduced, and double polarization or multi-axis signal transmission and reception can be implemented in a limited space.

In some embodiments, a separate ground layer may be formed to overlap the third radiation pattern 130 in a vertical direction, and the conductive member, metallic member, or sensor member of the display device to which the antenna element is applied is formed. It may be provided as the ground layer for the third radiation pattern 130 .

For example, the signal pad 140 is connected to an end of the third transmission line 135 and may be disposed on the lower dielectric layer 100c.

The transmission lines 115 , 125 , and 135 may have a mesh structure or a hollow structure.

In some embodiments, at least one of the first transmission line 115 , the second transmission line 125 , and the third transmission line 135 may have a hollow structure. In this case, for example, electrical signal loss may be reduced when a signal is transmitted between the radiation patterns 110 , 120 , and 130 and the signal pad 140 . In addition, since the transmission lines 115 , 125 , and 135 are disposed on the side dielectric layer 100b and the lower dielectric layer 100c , the signal efficiency of the antenna element may be improved without being recognized by a display user.

In some embodiments, the first transmission line 115 may include a mesh structure, and the second and third transmission lines 125 and 135 may include a solid structure. Accordingly, it is possible to sufficiently reduce external visibility while preventing signal loss of the antenna element.

3 is a plan view illustrating an antenna element in a planar state before being bent in exemplary embodiments.

Referring to FIG. 3 , the antenna pattern may further include a ground pad 145 . For example, a third transmission line 135 and a pair of ground pads 145 spaced apart from the signal pad 140 around the signal pad 140 may be disposed to face each other with the signal pad 140 interposed therebetween. can The ground pads 140 may be electrically and physically separated from the third transmission line 135 and the signal pad 140 . Accordingly, noise generated during transmission and reception of a radiation signal by the ground pads 145 may be efficiently filtered or reduced, and a horizontal radiation characteristic may be implemented together.

In some embodiments, the ground pad 145 may also be provided as a ground layer for the first radiation pattern 110 , and the radiation characteristic in the third direction may be implemented through the first radiation pattern 110 . may be

In some embodiments, a separate ground layer may be formed under the first radiation pattern 110 , and the conductive member of the display device including the antenna element is the ground layer for the first radiation pattern 110 . may be provided as

The conductive member may include, for example, various wires such as a gate electrode, a scan line or a data line of a thin film transistor (TFT) included in the display panel, or various electrodes such as a pixel electrode and a common electrode.

In an embodiment, for example, various structures including a conductive material disposed under the display panel may be provided as the ground layer. For example, a metal plate (eg, a stainless steel plate such as a SUS plate), a pressure sensor, a fingerprint sensor, an electromagnetic wave shielding layer, a heat dissipation sheet, a digitizer, or the like may be provided as the second electrode layer.

According to exemplary embodiments, the radiation patterns 110 , 120 , and 130 may provide signal transmission/reception in a high frequency or very high frequency (eg, 3G, 4G, 5G or higher) band. For example, the resonant frequency of the antenna pattern may be about 20 to 45 GHz.

In some embodiments, the radiation patterns 110 , 120 , and 130 may provide signal transmission/reception in a low frequency band of 10 GHz or less.

In example embodiments, the radiation patterns 110 , 120 , and 130 may adjust the drivable resonance frequency by adjusting the area of each radiation pattern.

In some embodiments, at least one of the first radiation pattern 110 , the second radiation pattern 120 , and the third radiation pattern 130 may have a different resonance frequency, for example, the radiation patterns ( 110, 120, and 130) may have different resonant frequencies. In this case, the areas of the radiation patterns 110 , 120 , and 130 may be different from each other according to the resonant frequencies of the radiation patterns 110 , 120 , and 130 .

In this case, the drivable frequency range of the antenna pattern may be formed in a dual or triple band. Accordingly, double polarization or multi-axis signal transmission/reception can be implemented in a limited space, and high-frequency or ultra-high frequency and wideband signal transmission and reception can be simultaneously implemented.

That the above-mentioned frequencies are formed in “dual” or “triple” bands may mean that one antenna pattern provides signal transmission/reception in two or three frequency bands at the same time.

As a non-limiting example, the resonant frequencies of the first radiation pattern 110 , the second radiation pattern 120 , and the third radiation pattern 130 may be 24 GHz, 28 GHz, and 38 GHz, respectively. In this case, the area of the first radiation pattern 110 may be larger than that of the second radiation pattern 120 , and the area of the second radiation pattern 120 may be larger than that of the third radiation pattern 130 . Accordingly, the radiation pattern of the high frequency band, which is weak in terms of noise, can be located on the rear surface of the display device, so that excellent antenna gain and radiation characteristics of the antenna pattern in the high frequency or ultra high frequency band can be secured.

The antenna pattern includes silver (Ag), gold (Au), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), chromium (Cr), titanium (Ti), tungsten (W), and niobium. (Nb), tantalum (Ta), vanadium (V), iron (Fe), manganese (Mn), cobalt (Co), nickel (Ni), zinc (Zn), molybdenum (Mo), tin (Sn), calcium (Ca) or an alloy containing at least one of them. These may be used alone or in combination of two or more.

For example, the antenna pattern may include silver (Ag) or a silver alloy to realize low resistance, for example, a silver-palladium-copper (APC) alloy. In an embodiment, the antenna pattern may include copper (Cu) or a copper alloy (eg, a copper-calcium (CuCa) alloy) in consideration of low resistance and fine line width patterning.

In some embodiments, the antenna pattern may include a transparent conductive oxide such as indium tin oxide (ITO), indium zinc oxide (IZO), indium zinc tin oxide (ITZO), or zinc oxide (ZnOx).

In some embodiments, the antenna pattern may include a stacked structure of a transparent conductive oxide layer and a metal layer, for example, a two-layer structure of a transparent conductive oxide layer-metal layer or a transparent conductive oxide layer-metal layer-transparent conductive oxide layer. may have a three-layer structure of In this case, while the flexible characteristic is improved by the metal layer, resistance may be lowered, and corrosion resistance and transparency may be improved by the transparent conductive oxide layer.

The antenna pattern may include a blackening processing unit. Accordingly, it is possible to reduce the reflectance on the surface of the antenna pattern, thereby reducing the visibility of the pattern due to light reflection.

In an embodiment, the blackening layer may be formed by converting the surface of the metal layer included in the antenna pattern into a metal oxide or metal sulfide. In an embodiment, a blackening layer such as a black material coating layer or a plating layer may be formed on the antenna pattern or the metal layer. The black material or plating layer may include silicon, carbon, copper, molybdenum, tin, chromium, molybdenum, nickel, cobalt, or an oxide, sulfide, or alloy containing at least one of these.

The composition and thickness of the blackening layer may be adjusted in consideration of the reflectance reduction effect and antenna radiation characteristics.

In exemplary embodiments, the antenna element in a planar state before being bent may include a preliminary dielectric layer 90 and an antenna pattern formed on the preliminary dielectric layer 90 .

The preliminary dielectric layer 90 may refer to a dielectric layer in a planar state before being bent in the form shown in FIGS. 1 and 2 , and the preliminary dielectric layer 90 includes a first region (I) and a second region (II). and a third region III.

After forming the antenna pattern on the preliminary dielectric layer 90, the preliminary dielectric layer 90 is folded so that the bottom surface of the first region (I) and the bottom surface of the third region (III) face each other through the second region (II). can For example, the second region II may be bent to substantially fold the preliminary dielectric layer.

In this case, the first region I and the third region III may overlap each other in the third direction. Accordingly, after being bent, the first region (I) and the third region (III) may be provided as the upper dielectric layer 100a and the lower dielectric layer 100c, respectively, and the second region (II) may be formed on the side dielectric layer 100b. can be matched.

For example, the first radiation pattern 110 is disposed on the first region (I), the second radiation pattern 120 is disposed on the second region (II), and the third radiation pattern 130 is It may be disposed on the third region III.

For example, the signal pad 140 may be disposed on the third region III.

In example embodiments, a plurality of antenna patterns may be arranged in an array form along a width direction of the preliminary dielectric layer 90 or the antenna element. In this case, since the antenna element may include a plurality of antenna patterns that can be driven in a dual or triple band in a narrow space, excellent antenna radiation characteristics and antenna gain may be realized even with a small area.

When a plurality of antenna patterns are arranged in an array form, for example, the first radiation patterns 110 included in the plurality of antenna patterns on the dielectric layer 100 are arranged along the width direction on the upper dielectric layer 100a, The second radiation patterns 120 included in the antenna patterns are arranged along the width direction on the side dielectric layer 100b, and the third radiation patterns 130 included in the plurality of antenna patterns are on the lower dielectric layer 100c. They may be arranged along the width direction.

In this case, radiation interference or signal interference between the radiation patterns 110 , 120 , and 130 having different resonant frequencies may be suppressed to improve radiation reliability and directivity at a frequency of a desired band. In addition, the radiation concentration may be improved to increase the antenna gain.

According to the above-described exemplary embodiments, an antenna pattern may be designed in three dimensions by utilizing the upper dielectric layer 100a, the side dielectric layer 100b, and the lower dielectric layer 100c. Accordingly, the area occupied by the antenna pattern can be reduced, for example, the bezel area of the image display device on which the antenna element is mounted can be reduced.

4 is a schematic cross-sectional view illustrating an antenna element according to some exemplary embodiments. Specifically, FIG. 4 is a cross-sectional view taken along line I-I' shown in FIG. 1 .

Referring to FIG. 4 , the antenna element according to some exemplary embodiments may further include a ground pattern 150 . The ground pattern 150 may be disposed inside the dielectric layer 100 , with the second radiation pattern 120 and the side dielectric layer 100b interposed therebetween. Accordingly, capacitance or inductance is formed in the longitudinal direction of the antenna element, so that a frequency band capable of being driven or sensed by the antenna element can be adjusted. In addition, side radiation through the side dielectric layer 100b may be implemented.

For example, the distance between the antenna pattern and the ground pattern 150 may be 40 to 1000 μm, and in this case, it is possible to easily implement resonant frequency characteristics of 3G, 4G, 5G or higher high-frequency or ultra-high frequency bands.

5 is a cross-sectional view illustrating an antenna element in a planar state before being bent in some exemplary embodiments.

Referring to FIG. 5 , the second radiation pattern 120 may be formed on the upper surface of the preliminary dielectric layer 90 , and the ground pattern 150 may be formed on the lower surface of the preliminary dielectric layer 90 .

For example, the first radiation pattern 110 is formed on the upper surface of the first region (I) portion of the preliminary dielectric layer 90 , and the second radiation pattern 120 is formed on the second region ( II), the third radiation pattern 130 and the signal pad 140 may be formed on the upper surface of the third region (III) portion of the preliminary dielectric layer 90 .

For example, the first transmission line 115 may connect the first radiation pattern 110 and the second radiation pattern 120 , and the second transmission line 125 may connect the second radiation pattern 120 and the third radiation pattern 120 . The radiation pattern 130 may be connected, and the third transmission line 135 may connect the third radiation pattern 130 and the signal pad 140 .

In some embodiments, the ground pattern 150 may be formed on the lower surface of the second region (II) portion of the preliminary dielectric layer 90 .

The preliminary dielectric layer 90 on which the second radiation pattern 120 and the ground pattern 150 are formed may be bent so that the ground pattern 150 is located inside the dielectric layer 100 through the second region II. Accordingly, the ground pattern 150 may be substantially surrounded by the upper dielectric layer 100a and the lower dielectric layer 100c.

4 , the second radiation pattern 120 and the ground pattern 150 may have a curved pattern shape such as a C-shape. Accordingly, the radiation direction can be expanded to increase radiation coverage.

6 is a plan view illustrating an antenna element in a planar state before being bent in some exemplary embodiments.

Referring to FIG. 6 , the antenna element includes a radiation pattern 110 , 120 , 130 formed on the preliminary dielectric layer 90 and a dummy mesh pattern 160 arranged spaced apart around the radiation pattern 110 , 120 , 130 . may include

According to some embodiments, at least one of the radiation patterns 110 , 120 , and 130 may have a mesh structure. For example, the first radiation pattern 110 may have a mesh structure, and the second radiation pattern 120 , the third radiation pattern 130 , and the transmission lines 115 , 125 , and 135 may have a hollow structure. have.

In this case, as shown in FIG. 6 , the dummy mesh pattern 160 is formed on the first region I of the preliminary dielectric layer 90 , and may be spaced apart from the periphery of the first radiation pattern 110 . have.

In some embodiments, the electrode line included in the mesh structure is made of a low-resistance metal such as copper, a copper alloy (eg, CuCa), silver, a silver alloy (eg, silver-palladium-copper (APC)). By forming it, it is possible to suppress an increase in resistance, so that it is possible to effectively implement a low-resistance and high-sensitivity transparent antenna element.

The dummy mesh pattern 160 and the first radiation pattern 110 may include a mesh structure having substantially the same shape. Accordingly, in the first region (I) of the dielectric layer 100 disposed on the display, the electrode arrangement around the antenna pattern is uniformed so that the mesh structure or the electrode line included therein is the user of the display device to which the antenna element is applied. can be prevented from being recognized by

7 is a schematic cross-sectional view illustrating an antenna element according to some exemplary embodiments. Specifically, FIG. 9 is a schematic diagram showing a cross-section taken along the line I-I' shown in FIG. 1 .

Referring to FIG. 7 , the antenna element may be disposed on the display panel 230 . For example, the display panel 230 may include a flat or curved LCD panel and an OLED panel, and the antenna element may be formed in a curved shape along the side surface of the display panel 230 .

In exemplary embodiments, after the antenna pattern is formed on the preliminary dielectric layer 90 , the bottom surface of the first region (I) and the bottom surface of the third region (III) face each other through the second region (II) It can be folded for viewing, and the antenna element can be formed on the display panel 230 . For example, the display panel 230 and the preliminary dielectric layer 90 may be bonded to each other through an adhesive layer, and the adhesive layer may include a material having a dielectric constant.

The display panel 230 may be provided as a ground layer of the antenna pattern. For example, the display panel 230 may include an electrode layer 210 formed on the panel substrate 220 , and a conductive member of the electrode layer 210 may be provided as the ground layer of the antenna pattern.

In example embodiments, the first region (I) of the dielectric layer 100 may be disposed on the electrode layer 210 , and the second region (II) of the dielectric layer 100 is a side surface of the display panel 230 . can be folded along For example, when a curved OLED is used as the display panel 230 , the conductive member of the display panel 230 is disposed on the first region (I) in the first radiation pattern 110 and in the second region (II). It may be used as a ground layer of the second radiation pattern 120 disposed thereon.

In some example embodiments, the third region III of the dielectric layer 100 may be disposed under the display panel 230 . Accordingly, the conductive member formed on the lower surface of the display panel 230 may serve as a ground layer of the third radiation pattern 130 .

8 and 9 are schematic plan views for explaining a display apparatus according to example embodiments. For example, FIG. 8 is a schematic plan view for explaining an electrode structure included in a display panel. 9 illustrates an external shape including a window of the display device.

Referring to FIG. 8 , the display device may include the antenna element formed on the display panel 230 , and the display panel 230 may include a panel substrate 220 and an electrode layer 210 . For example, the display panel 230 may be a display panel such as an LCD panel or an OLED panel.

For example, the electrode layer 210 may include a pixel structure including a thin film transistor (TFT), a wiring structure, and an electrode structure. For example, various wiring structures such as a TFT including an active layer 250 included in the display panel 230 , a scan line 265 , and a data line 260 , a source electrode 262 , a gate electrode 267 , An electrode structure such as the drain electrode 270 and the pixel electrode 280 may be a conductive member of the display panel 230 . Accordingly, a conductive member included in the display panel 230 may be used as a ground layer without the need to form a separate ground layer under the radiation patterns 110 , 120 , and 130 of the antenna element.

Referring to FIG. 9 , the display apparatus 300 may include a display area 310 and a peripheral area 320 . The peripheral area 320 may be disposed on both sides and/or both ends of the display area 310 .

The peripheral area 320 may correspond to, for example, a light blocking part or a bezel part of the image display device. An integrated circuit (IC) chip for controlling driving/radiation characteristics of the antenna element and supplying a power supply signal may be disposed in the peripheral region 320 .

The antenna element according to the above-described exemplary embodiments may be inserted into the peripheral region 320 in the form of, for example, an antenna film or an antenna patch. As described above, the antenna element may be three-dimensionally disposed through the side dielectric layer 100b or the second region (II). Accordingly, the area or volume of the peripheral region 320 may be reduced and the size of the display region 310 on which an image is displayed may be relatively increased.

In some embodiments, the antenna element may be located at least partially in the display area 310 . In this case, as described with reference to FIG. 6 , the antenna pattern may include a mesh structure, thereby preventing image quality from being deteriorated by the antenna pattern.

90: preliminary dielectric layer 100: dielectric layer
110: first radiation pattern 115: first transmission line
120: second radiation pattern 125: second transmission line
130: third radiation pattern 135: third transmission line
140: signal pad 145: ground pad
150: ground pattern 160: dummy mesh pattern
210: electrode layer 220: panel substrate
230: display panel 300: display device

Claims (16)

a dielectric layer comprising an upper dielectric layer, a side dielectric layer integrally connected with the upper dielectric layer on one side, and a lower dielectric layer integrally connected with the other side of the side dielectric layer; and
a first radiation pattern disposed on the upper dielectric layer, a second radiation pattern disposed on the side dielectric layer, and a second radiation pattern disposed on the lower dielectric layer and having a structure continuously extending and bent over the upper dielectric layer, the side dielectric layer, and the lower dielectric layer; An antenna element comprising an antenna pattern comprising a third radiation pattern disposed on the . The antenna element according to claim 1, wherein the side dielectric layer has a curved or bent shape. The antenna element according to claim 1, wherein the first radiation pattern has a mesh structure. The antenna element according to claim 3, wherein the first radiation pattern further comprises a dummy mesh pattern arranged to be spaced apart from the first radiation pattern in a periphery. The antenna element according to claim 1, wherein at least one of the second radiation pattern and the third radiation pattern has a solid structure. The antenna element according to claim 1, wherein at least one of the first radiation pattern, the second radiation pattern, and the third radiation pattern has a different resonance frequency. The antenna element according to claim 6, wherein resonant frequencies of all of the first radiation pattern, the second radiation pattern, and the third radiation pattern are different from each other. The method according to claim 1, The antenna pattern,
a first transmission line extending between the first radiation pattern and the second radiation pattern;
a second transmission line extending between the second radiation pattern and the third radiation pattern;
a third transmission line branching and extending from the third radiation pattern; and
and a signal pad connected to an end of the third transmission line. The antenna element according to claim 8, wherein at least one of the first transmission line, the second transmission line, and the third transmission line has a solid structure. The antenna element of claim 8 , wherein the antenna pattern further comprises a ground pad disposed to be spaced apart from the third transmission line and the signal pad around the signal pad. The antenna element of claim 1, further comprising a ground pattern disposed inside the side dielectric layer and disposed with the second radiation pattern and the side dielectric layer interposed therebetween. The antenna element according to claim 1, wherein the plurality of antenna patterns are physically spaced apart from each other and arranged in an array form along a width direction. The method according to claim 12, wherein the first radiation patterns included in the plurality of antenna patterns on the dielectric layer are arranged along the width direction on the upper dielectric layer,
The second radiation patterns included in the plurality of antenna patterns are arranged along the width direction on the side dielectric layer,
The third radiation patterns included in the plurality of antenna patterns are arranged along the width direction on the lower dielectric layer. The method according to claim 1, wherein the dielectric layer is a preliminary dielectric layer in a planar state including a first region, a second region, and a third region, the second region is bent so that a bottom surface of the first region and a bottom surface of the third region are mutually It is formed by folding to face
and a surface of the second region of the preliminary dielectric layer corresponds to the side dielectric layer. The method according to claim 14, wherein the upper dielectric layer is disposed on the electrode structure included in the display panel,
The electrode structure is provided as a ground layer of the antenna pattern, the antenna element. A display device comprising the antenna element according to claim 1 .

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