Antenna element and display device including the same

Abstract

The present invention relates to an antenna element and a display device including the same. The antenna element according to an embodiment may include: a dielectric layer; a first radiator in a rhombus shape, which is disposed on the upper surface of the dielectric layer; a transmission line connected to the first radiator; a signal pad connected to one end of the transmission line; a ground pad disposed around the signal pad; and a second radiator extending from the ground pad along the bottom side of the first radiator.

Description

Technical Field

[0001] The present invention relates to an antenna element and a display device including the same. Background Art

[0002] Recently, with the development of the information society, wireless communication technologies such as Wi-Fi and Bluetooth are combined with display devices and implemented in the form of, for example, smart phones. In this case, an antenna may be combined with the display device to perform a communication function.

[0003] Recently, with the development of mobile communication technologies, an antenna for performing communication in a high frequency or ultra-high frequency band needs to be combined with a display device.

[0004] As display devices equipped with antennas become thinner and lighter, the space occupied by the antenna may also be reduced. Thus, it is not easy to simultaneously achieve the transmission and reception of high frequency and wideband signals in a limited space.

[0005] For example, in the case of recent 5G high frequency band communication, as the wavelength becomes shorter, signal transmission and reception may be blocked, and it may be necessary to achieve the transmission and reception of multi-band signals.

[0006] It is necessary to apply an antenna in the form of a film or a patch to a display device, and in order to achieve the above high frequency communication, even in a thin structure, it is necessary to design an antenna structure for ensuring the reliability of radiation characteristics.

[0007] For example, Korean Patent Publication No. 2010-0114091 discloses a dual patch antenna module, but since it is made thin in a limited space, it may not be sufficient for application to small devices. Summary of the Invention

[0008] Technical Problem

[0009] An object of the present invention is to provide an antenna element and a display device including the same.

[0010] Technical Solution

[0011] 1. An antenna element, comprising: a dielectric layer; a first radiator having a rhombus shape, which is disposed on an upper surface of the dielectric layer; a transmission line, which is connected to the first radiator; a signal pad, which is connected to one end of the transmission line; a ground pad, which is disposed around the signal pad; and a second radiator, which extends from the ground pad along a bottom side of the first radiator.

[0012] 2. The antenna element according to 1 above, wherein the second radiator extends in parallel with the bottom side of the first radiator at a predetermined interval.

[0013] 3. The antenna element according to 1 above, wherein the first radiator has a shape in which one or more corners are cut off.

[0014] 4. The antenna element according to 1 above, wherein the second radiator has a shape in which one or more corners are cut off.

[0015] 5. The antenna element according to 1 above, wherein the resonance frequency of the first radiator is different from the resonance frequency of the second radiator.

[0016] 6. The antenna element according to 1 above, wherein the second radiator is electrically and physically separated from the first radiator and the transmission line.

[0017] 7. The antenna element according to 1 above, wherein the second radiator and the ground pad are formed as a single component.

[0018] 8. The antenna element according to 1 above, wherein at least one of the first radiator, the second radiator, and the transmission line is formed as a mesh structure, and at least one of the signal pad and the ground pad is formed as a solid structure.

[0019] 9. The antenna element according to 1 above, wherein the second radiator includes a pair of second radiators, and the pair of second radiators are arranged to face each other across the transmission line on the upper surface of the dielectric layer.

[0020] 10. The antenna element according to 1 above, further comprising: dummy patterns disposed on the upper surface of the dielectric layer around the first radiator and the second radiator.

[0021] 11. The antenna element according to 10 above, wherein the dummy patterns are formed as a mesh structure Antenna element.

[0022] 12. A display device, comprising the antenna element of the above embodiment.

[0023] Effects of the invention

[0024] By arranging the first radiator and the second radiator adjacent to each other on the upper surface of the dielectric layer, a dual-band antenna with coupling between the first radiator and the second radiator can be realized.

[0025] In addition, by providing the second radiator along the bottom side of the diamond-shaped first radiator, the antenna gain can be increased.

[0026] In addition, by forming the antenna conductive layer of the antenna element located in the display portion of the display device as a mesh structure, the transmittance of the antenna element can be increased, and visibility by the user when the antenna element is mounted on the display device can be suppressed. Description of the Drawings

[0027] Figure 1 FIG. is a schematic cross-sectional view showing an antenna element of an embodiment.

[0028] Figure 2 FIG. is a schematic plan view showing an antenna element of an embodiment.

[0029] Figure 3 FIG. is a schematic plan view showing an antenna element of another embodiment.

[0030] Figure 4 FIG. is a schematic plan view showing an antenna element of yet another embodiment.

[0031] Figure 5 FIG. is a schematic plan view showing an antenna element of yet another embodiment.

[0032] Figure 6 FIG. is a schematic plan view showing an antenna element of yet another embodiment.

[0033] Figure 7 FIG. is a schematic plan view for explaining a display device of an embodiment. Detailed Description of the Embodiments

[0034] Hereinafter, embodiments will be described in detail with reference to the drawings. When attaching reference numerals to the components of each figure, it should be noted that for the same components, even if they are shown in different figures, the same reference numerals are used as much as possible.

[0035] When describing the embodiments, when it is determined that a detailed description of related well-known techniques may unnecessarily obscure the gist of the embodiments, the detailed description thereof will be omitted. In addition, the following terms are terms defined in consideration of the functions in the embodiments, and thus may vary depending on the intentions or customs of users, operators, etc. Therefore, the definitions should be determined based on the entire content of the specification.

[0036] Terms such as first, second, etc. may be used to describe various components, but are only for the purpose of distinguishing one component from another. Unless otherwise clearly defined in the context, singular expressions include plural expressions, and terms such as "including" or "having" should be understood as being used to specify the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and do not preclude the presence or additivity of one or more other features, numbers, steps, actions, components, parts, or combinations thereof in advance.

[0037] In addition, directional terms such as "one side", "the other side", "upper part", "lower part", etc. are used in accordance with the orientation of the disclosed figures. Since the components of the embodiments of the present invention can be set in various orientations, the directional terms are used for illustrative purposes and are not intended to limit them.

[0038] In addition, the distinction of components in this specification is only made according to the main functions responsible for each component. That is, two or more components can be combined into one component, or one component can be divided into two or more components with more refined functions. In addition, each component can execute part or all of the functions responsible for other components in addition to executing its own main function, and part of the main function responsible for each component can also be specifically responsible for execution by other components.

[0039] The antenna element described in this specification can be a patch antenna or a microstrip antenna made in the form of a transparent film. The antenna element can be applied to communication devices for high-frequency to ultra-high-frequency (e.g., 3G, 4G, 5G or higher) mobile communication, Wi-fi, Bluetooth, NFC (Near Field Communication), GPS (Global Positioning System), etc., but is not limited thereto. In addition, the antenna element can be applied to various objects or structures such as vehicles and buildings.

[0040] In the following figures, two directions parallel to the upper surface of the dielectric layer and intersecting each other are defined as the first direction and the second direction. At this time, the first direction and the second direction can intersect perpendicularly to each other. In addition, the direction perpendicular to the upper surface of the dielectric layer is defined as the third direction. For example, the first direction can correspond to the length direction of the antenna element, the second direction can correspond to the width direction of the antenna element, and the third direction can correspond to the thickness direction of the antenna element.

[0041] Figure 1 is a schematic cross-sectional view showing an antenna element of an embodiment.

[0042] Referring to Figure 1 , the antenna element 100 can include a dielectric layer 110 and an antenna conductive layer 120.

[0043] The dielectric layer 110 may include an insulating material having a specified dielectric constant. According to one embodiment, the dielectric layer 110 may include an inorganic insulating material such as glass, silicon oxide, silicon nitride, and metal oxide, or an organic insulating material such as epoxy resin, acrylic resin, and imide-based resin. The dielectric layer 110 may function as a film base material of an antenna element for forming the antenna conductive layer 120.

[0044] According to one embodiment, a transparent film may be provided as the dielectric layer 110. At this time, the transparent film may include polyester resins such as polyethylene terephthalate, polyethylene isophthalate, polyethylene naphthalate, and polybutylene terephthalate; cellulose resins such as diacetyl cellulose and triacetyl cellulose; polycarbonate resin; acrylic resins such as poly(methyl)methacrylate and poly(methyl)ethyl acrylate; styrene resins such as polystyrene and acrylonitrile-styrene copolymer; polyolefin resins such as polyethylene, polypropylene, polyolefin having a cyclic group or a norbornene structure, and ethylene-propylene copolymer; vinyl chloride resin; amino resins such as nylon and aromatic polyamide; imide resin; polyethersulfone resin; sulfone resin; polyetheretherketone resin; polyphenylene sulfone resin; vinyl alcohol resin; vinylidene chloride resin; vinyl butyral resin; acrylate resin; polyoxymethylene resin; thermoplastic resins such as epoxy resin, etc. These may be used alone or in combination of two or more. In addition, a transparent film made of a thermosetting resin or an ultraviolet curable resin such as (meth)acrylic group, urethane group, acrylic urethane group, epoxy group, and silicon group may be used as the dielectric layer 110.

[0045] According to one embodiment, the dielectric layer 110 may include an adhesive film such as an optically clear adhesive (OCA) and an optically clear resin (OCR).

[0046] According to one embodiment, the dielectric layer 110 may be substantially formed as a single layer, or may include a multilayer structure of at least two layers or more.

[0047] A capacitance or an inductance may be formed through the dielectric layer 110, thereby adjusting a frequency band that the antenna element 100 can drive or sense. When the dielectric constant of the dielectric layer 110 exceeds about 12, the driving frequency is excessively reduced, so that driving in a desired high frequency band may not be achieved. Therefore, according to one embodiment, the dielectric constant of the dielectric layer 110 may be adjusted to a range of about 1.5 to 12, preferably, a range of about 2 to 12.

[0048] According to an embodiment, the insulating layer (e.g., the encapsulation layer, the passivation layer, etc. of the display panel) inside the display device on which the antenna element 100 is mounted may be provided as the dielectric layer 110.

[0049] The antenna conductive layer 120 may be disposed on the upper surface of the dielectric layer 110. The antenna conductive layer 120 may include one or more antenna patterns, and the antenna pattern includes a first radiator and a second radiator.

[0050] The antenna conductive layer 120 may include a low-resistance metal such as 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), etc., or an alloy containing at least one of them. These may be used alone or in combination of two or more. For example, in order to achieve low resistance, the antenna conductive layer 120 may include silver (Ag) or a silver alloy (e.g., silver-palladium-copper (APC) alloy). Again, for example, considering low resistance and fine linewidth patterning, the antenna conductive layer 120 may include copper (Cu) or a copper alloy (e.g., copper-calcium (CuCa) alloy).

[0051] According to an embodiment, the antenna conductive layer 120 may include a transparent conductive metal oxide such as indium tin oxide (ITO), indium zinc oxide (IZO), indium zinc tin oxide (ITZO), zinc oxide (ZnOx), copper oxide (CuO), etc.

[0052] According to an embodiment, the antenna conductive layer 120 may include a stacked structure of a transparent conductive oxide layer and a metal layer, and may, for example, have a two-layer structure of a transparent conductive oxide layer - metal layer or a three-layer structure of a transparent conductive oxide layer - metal layer - transparent conductive oxide layer. In this case, while the flexibility characteristics can be improved by the metal layer, the resistance can be reduced to increase the signal transmission speed, and the corrosion resistance and transparency can be improved by the transparent conductive oxide layer.

[0053] According to an exemplary embodiment, the antenna conductive layer 120 may include a blackening treatment portion. Thus, the reflectance on the surface of the antenna conductive layer 120 can be reduced to reduce the pattern visibility caused by light reflection.

[0054] According to an embodiment, the surface of the metal layer included in the antenna conductive layer 120 may be converted into a metal oxide or a metal sulfide to form a blackening layer. According to an embodiment, a black material coating or a blackening layer such as a gold plating layer may be formed on the antenna conductive layer 120 or the metal layer. Here, the black material or the gold plating layer may include oxides, sulfides, alloys, etc. containing silicon, carbon, copper, molybdenum, tin, chromium, molybdenum, nickel, cobalt, or at least one of these.

[0055] The composition and thickness of the blackening layer may be adjusted in consideration of the reflectance reduction effect and the antenna radiation characteristics.

[0056] Specific descriptions of the antenna conductive layer 120 will be referred to in Sections 2 to Figure 7 and will be described later.

[0057] According to an embodiment, the antenna element 100 may further include a ground layer 130. Since the antenna element 100 includes the ground layer 130, vertical radiation characteristics may be achieved.

[0058] The ground layer 130 may be formed on the bottom surface of the dielectric layer 110. The ground layer 130 may be configured to at least partially overlap with the antenna conductive layer 120 across the dielectric layer 110. For example, the ground layer 130 may overlap with the radiators (see Figure 2 210 and 230) of the antenna conductive layer 120.

[0059] According to an embodiment, the conductive components of the display device or the display panel on which the antenna element 100 is mounted may be set as the ground layer 130. For example, the conductive components may include electrodes or wirings such as gates, source / drain electrodes, pixel electrodes, common electrodes, data lines, scan lines, etc. of thin film transistors (TFTs) included in the display panel, as well as stainless steel (SUS) plates, heat sinks, digitizers, electromagnetic wave shielding layers, pressure sensors, fingerprint sensors, etc. of the display device.

[0060] Figure 2 is a schematic plan view showing an antenna element according to an embodiment.

[0061] Referring to Figure 1 and Figure 2 , an antenna element 100 according to an embodiment may include an antenna conductive layer 120 formed on the upper surface of a dielectric layer 110, and the antenna conductive layer 120 may include: an antenna pattern including a first radiator 210 and a second radiator 230, a transmission line 220, and a pad electrode 240.

[0062] The first radiator 210 can radiate or receive wireless signals. The first radiator 210 can be formed into a mesh structure. Thereby, the transmittance of the first radiator 210 can be increased, and the flexibility of the antenna element 100 can be improved. Therefore, the antenna element 100 can be effectively applied to a flexible display device.

[0063] The first radiator 210 can be implemented to be capable of driving or operating at a first resonance frequency. For example, the lengths of the first direction and the second direction of the first radiator 210 can be determined according to the desired first resonance frequency, radiation resistance, and gain of the first radiator 210. Here, the first resonance frequency can be in the 28 GHz band, but is not limited thereto.

[0064] According to an embodiment, as Figure 2 shown, the first radiator 210 can be implemented as a rhombus or diamond shape in which the bottom side connecting the transmission line 220 has an inclination angle with respect to a straight line parallel to the second direction. However, this is only one embodiment, and there is no special limitation on the shape of the first radiator 210. That is, the first radiator 210 can be implemented in various shapes such as a rectangle, a circle, etc.

[0065] The transmission line 220 can supply signals to the first radiator 210. The transmission line 220 can be disposed between the first radiator 210 and the signal pad 241 of the pad electrode 240, and diverge from the first radiator 210 to electrically connect the first radiator 210 and the signal pad 241.

[0066] According to an embodiment, the transmission line 220 can include a conductive material substantially the same as that of the first radiator 210. In addition, the transmission line 220 can be integrally connected to the first radiator 210 to be substantially formed as a single component, or formed as a component independent of the first radiator 210.

[0067] According to an embodiment, the transmission line 220 can be formed into a mesh structure having substantially the same shape (e.g., the same line width, the same pitch, etc.) as the first radiator 210.

[0068] The second radiator 230 can radiate or receive wireless signals. The first radiator 210 and the transmission line 220 can be electrically separated, physically separated, and coupled to the first radiator 210 and the transmission line 220 to be powered.

[0069] The second radiator 230 may extend parallel to the first radiator 210 from the ground pad 242 of the pad electrode 240. In addition, the angle on the first radiator 210 side of the second radiator 230 has a cut-off shape, extends along the bottom side of the diamond-shaped first radiator 210, and the cut-off portion 231 of the angle of the second radiator 230 may be spaced apart from the first radiator 210 by a predetermined distance D and parallel to the opposite side of the first radiator 210. Here, the predetermined distance D may be determined within a range that does not substantially affect the first radiator 210 due to the electric field generated between the second radiator 220 and the first radiator 210. For example, the predetermined distance D is constant at all positions and may be 50 μm to 125 μm.

[0070] According to an embodiment, the second radiator 230 may be integrally connected to the ground pad 242 and substantially formed as a single component, or formed as a component independent of the ground pad 242. In addition, the width of the second radiator 230 may be formed to be less than or equal to or greater than the width of the ground pad 242.

[0071] According to an embodiment, a pair of second radiators 230 may be formed in a CPW (Coplanar Waveguide with Ground) ground structure configured to face each other across the transmission line 220 on the upper surface of the dielectric layer 110 having a ground layer 130 disposed on the bottom surface.

[0072] The length of the second radiator 230 in the first direction may be determined within a range that satisfies Equation 1 in consideration of the desired second resonance frequency. Here, the second resonance frequency may be higher than the first resonance frequency. For example, the second resonance frequency may be in the 38 GHz band, but is not limited thereto.

[0073]

Equation 1

[0074] L1 < L3 ≤ L1 + L2

[0075] Wherein, L1 may represent the length of the transmission line 220 in the first direction, L2 may represent the length of the first radiator 210 in the first direction, and L3 may represent the length of the second radiator 230 in the first direction.

[0076] According to an embodiment, the second radiator 230 may be formed in a grid structure having substantially the same shape as the first radiator 210 (e.g., the same line width, the same spacing, etc.). Thereby, the transmittance of the antenna pattern can be improved, and it can be prevented from being visible to the user when the antenna element 100 is mounted on the display device. The second radiator 23 may include substantially the same conductive material as the first radiator 210.

[0077] As Figure 2As shown, the second radiator 230 may be formed into a CPW (Coplanar Waveguide with Ground) ground structure, and the first radiator 230 and the second radiator 230 of the CPW ground structure divide the supply current of the transmission line 220 into two parts. When the supply current of a transmission line 220 is divided into two parts, the gains of the first radiator 210 and the second radiator 230 may decrease. According to an embodiment, the length of the second radiator 230 in the first direction satisfies the foregoing mathematical formula 1, and is implemented by cutting off the corner on the side of the first radiator 230 of the second radiator 220 so that the cut-off part 231 of the corner is spaced apart from the first radiator 210 by a predetermined distance D and is parallel to the opposite side of the first radiator 210, thereby reducing the coupling distance between the first radiator 210 and the second radiator 230. Thus, the gains of the first radiator 210 and the second radiator 230 can be increased.

[0078] The pad electrode 240 may include a signal pad 241 and a ground pad 242.

[0079] The signal pad 241 may be connected to the end of the transmission line 220 and is electrically connected to the first radiator 210 through the transmission line 220. Thus, the signal pad 241 can electrically connect the driving circuit unit (e.g., an IC chip, etc.) and the first radiator 210. For example, a circuit board such as a flexible printed circuit board (FPCB) may be bonded to the signal pad 241, and the driving circuit unit may be mounted on the flexible printed circuit board. Thus, the first radiator 210 and the driving circuit unit can be electrically connected.

[0080] The ground pad 242 may be disposed around the signal pad 241 and is electrically and physically separated from the signal pad 241. For example, a pair of ground pads 242 may be disposed facing each other across the signal pad 241.

[0081] According to an embodiment, the signal pad 241 and the ground pad 242 may be formed into a solid structure including the above-mentioned metal or alloy in order to reduce the signal resistance.

[0082] On the other hand, for the convenience of illustration, Figure 2 only one antenna pattern is shown, but there may be multiple antenna patterns arranged in an array on the upper surface of the dielectric layer 110. In this case, in order to minimize the radiation interference from each antenna pattern, the spacing distance between the antenna patterns may be greater than half of the wavelength corresponding to the resonance frequency (e.g., the first resonance frequency or the second resonance frequency) of the antenna pattern.

[0083] Figure 3 is a schematic plan view showing an antenna element of another embodiment.

[0084] Reference Figure 1 and Figure 3 , the antenna conductive layer 120 may include: an antenna pattern including a first radiator 310 and a second radiator 230, a transmission line 220, and a pad electrode 240. Here, since the transmission line 220, the second radiator 230, and the pad electrode 240 are the same as those described with reference to Figure 2 above, detailed descriptions thereof are omitted. In addition, since the first radiator 310 is similar to the first radiator 210 of Figure 2 , detailed descriptions thereof are omitted within the scope of repetition.

[0085] As Figure 3 shown, the first radiator 310 may include portions 311 where one or more corners are cut off. That is, in the first radiator 31, one or more corners may be cut off, and at this time, the size or area of the cut may vary depending on the specifications of the desired antenna element. Thereby, the first radiator 310 can generate circular polarization.

[0086] Figure 4 is a schematic plan view showing an antenna element of another embodiment.

[0087] Reference Figure 1 and Figure 4 , the antenna conductive layer 120 may include: an antenna pattern including a first radiator 210 and a second radiator 430, a transmission line 220, and a pad electrode 240. Here, since the first radiator 210, the transmission line 220, and the pad electrode 240 are the same as those described with reference to Figure 2 above, detailed descriptions thereof are omitted. In addition, since the second radiator 430 is similar to the second radiator 230 of Figure 2 , detailed descriptions thereof are omitted within the scope of repetition.

[0088] As Figure 4 shown, in addition to the portion 231 where the corner is cut off, the second radiator 430 may further include portions 432 where the corners are further cut off. That is, in the second radiator 430, in addition to the corners on the side of the first radiator 210, one or more corners may be further cut off, and at this time, the size or area of the cut may be the same as the size and area of the cut of the portion 231 where the corner is cut off. However, not limited thereto, the size or area of the cut of the portion 432 where the corner is cut off may vary depending on the specifications of the desired antenna element.

[0089] Figure 5 is a schematic plan view showing an antenna element of another embodiment.

[0090] Reference Figure 1 and Figure 5, the antenna conductive layer 120 may include: an antenna pattern including a first radiator 310 and a second radiator 430, a transmission line 220, and a pad electrode 240. Here, since the transmission line 220 and the pad electrode 240 are the same as those described with reference to Figure 2 above, the first radiator 310 is the same as Figure 3 above, and the second radiator 430 is the same as that described with reference to Figure 4 above, their detailed descriptions are omitted.

[0091] As Figure 5 shown, in the first radiator 310, one or more corners may be cut off; in the second radiator 430, in addition to the corners on the side of the first radiator 310, one or more corners may be further cut off.

[0092] Figure 6 is a schematic plan view showing an antenna element of another embodiment.

[0093] Referring to Figure 1 and Figure 6 , the antenna conductive layer 120 may include: an antenna pattern including a first radiator 210 and a second radiator 230, a transmission line 220, a pad electrode 240, and a dummy pattern 250. Here, since the first radiator 210, the second radiator 230, the transmission line 220, and the pad electrode 240 are the same as those described with reference to Figure 2 above, their detailed descriptions are omitted.

[0094] The dummy pattern 250 may be arranged around the first radiator 210 and the second radiator 230, and may also be further arranged between the first radiator 210 and the second radiator 230 and / or between the second radiator 230 and the transmission line 220.

[0095] The dummy pattern 250 may be formed into a grid structure having substantially the same shape (e.g., the same line width, the same pitch, etc.) as at least one of the first radiator 210, the second radiator 230, and the transmission line 220, and includes the same metal as at least one of the first radiator 210, the second radiator 230, and the transmission line 220. According to an embodiment, a part of the grid electrode forming the dummy pattern 250 may be segmented.

[0096] The dummy pattern 250 may be configured to be electrically and physically separated from the first radiator 210, the second radiator 230, the transmission line 220, and the pad electrode 240. For example, a separation region 251 may be formed along the side lines or contours of the first radiator 210, the second radiator 230, and the transmission line 220 to separate the dummy pattern 250 from the first radiator 210, the second radiator 230, and the transmission line 220.

[0097] As described above, by arranging dummy patterns 250 having a grid structure substantially the same as at least one of the first radiator 210, the second radiator 230, and the transmission line 220 around the first radiator 210, the second radiator 230, and the transmission line 220, it is possible to prevent the antenna pattern from being visible to the user of the display device equipped with the antenna element due to differences in electrode arrangement at each position.

[0098] Figure 7 is a schematic plan view for explaining a display device according to an embodiment. More specifically, Figure 7 is a view showing the external shape of a window including the display device.

[0099] Referring to Figure 7 , the display device 700 may include a display area 710 and a peripheral area 720. The peripheral area 720 may be disposed, for example, on both side portions and / or both end portions of the display area 710.

[0100] According to an embodiment, the aforementioned antenna element may be inserted into the display device 700 in the form of a film or a patch. For example, the first radiators 210, 310, the second radiators 230, 430, and the transmission line 220 of the antenna element may be configured to at least partially correspond to the display area 710 of the display device 700, and the pad electrodes 240 may be configured to correspond to the peripheral area 720 of the display device 700.

[0101] The peripheral area 720 may correspond to, for example, a light-shielding portion or a border portion of the display device 700. In addition, a drive circuit such as an IC chip of the display device 700 and / or the antenna element may be arranged in the peripheral area 720.

[0102] By arranging the pad electrodes 240 of the antenna element adjacent to the drive circuit, the signal transmission and reception path can be shortened to suppress signal loss.

[0103] When the antenna element includes the dummy pattern 250, the dummy pattern 250 may be configured to at least partially correspond to the display area 710 of the display device 700.

[0104] Since the antenna element includes an antenna pattern and / or a dummy pattern formed in a grid structure, the transmittance can be increased and the electrode visibility can be significantly reduced or suppressed. Therefore, while maintaining or improving the desired communication reliability, the image quality in the display area 710 can also be improved.

[0105] So far, the analysis has been carried out centering on the preferred embodiments. Those of ordinary skill in the art will understand that the present invention can be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the scope of the present invention is not limited to the foregoing embodiments, but should be construed as including various embodiments falling within the scope equivalent to the content recited in the claims.

[0106] [Experimental Example: Performance Evaluation Corresponding to the Spacing Distance D between the First Radiator and the Second Radiator]

[0107] The first radiator and the second radiator in the form shown in Figure 2 were formed on the dielectric layer. While gradually increasing the spacing distance D between the second radiator and the first radiator, the antenna gains of the first radiator and the second radiator were measured.

[0108] [Table 1]

[0109]

[0110] Referring to Table 1, it can be seen that as the spacing distance D between the second radiator and the first radiator increases, the antenna gains of the first radiator and the second radiator increase and then decrease. In particular, it can be seen that when the spacing distance D is 50 μm to 125 μm, the first radiator and the second radiator can respectively obtain excellent levels of antenna gain.

Claims

1. An antenna element, characterized in that, Comprising: A dielectric layer; A first radiator in a rhombus shape, which is disposed on the upper surface of the dielectric layer; A transmission line, which is connected to the first radiator; A signal pad, which is connected to one end of the transmission line; A ground pad, which is disposed around the signal pad; And A second radiator, which extends from the ground pad, The second radiator includes corners in a cut-off shape, The corners extend parallel to the bottom side of the first radiator and maintain a specified spacing at all positions, The spacing is determined within a range of 50 μm to 125 μm where the electric field generated between the first radiator and the second radiator will not affect the first radiator.

2. The antenna element according to claim 1, characterized in that The first radiator is in a shape with one or more corners cut off.

3. The antenna element according to claim 1, characterized in that The second radiator is in a shape with one or more other corners further cut off.

4. The antenna element according to claim 1, characterized in that The resonance frequency of the first radiator is different from the resonance frequency of the second radiator.

5. The antenna element according to claim 1, characterized in that The second radiator is electrically and physically separated from the first radiator and the transmission line.

6. The antenna element according to claim 1, characterized in that The second radiator and the ground pad are formed as a single component.

7. The antenna element according to claim 1, characterized in that At least one of the first radiator, the second radiator, and the transmission line is formed as a grid structure, At least one of the signal pad and the ground pad is formed as a solid structure.

8. The antenna element according to claim 1, characterized in that The second radiator includes a pair of second radiators, and the pair of second radiators are disposed on the upper surface of the dielectric layer to face each other across the transmission line.

9. The antenna element according to claim 1, wherein Further comprising: A dummy pattern, which is disposed on the upper surface of the dielectric layer around the first radiator and the second radiator.

10. The antenna element according to claim 9, characterized in that The dummy pattern is formed as a grid structure.

11. A display device, characterized in that It includes the antenna element according to claim 1.

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