WO2021246672A1 - Élément d'antenne - Google Patents

Élément d'antenne Download PDF

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Publication number
WO2021246672A1
WO2021246672A1 PCT/KR2021/005875 KR2021005875W WO2021246672A1 WO 2021246672 A1 WO2021246672 A1 WO 2021246672A1 KR 2021005875 W KR2021005875 W KR 2021005875W WO 2021246672 A1 WO2021246672 A1 WO 2021246672A1
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WO
WIPO (PCT)
Prior art keywords
antenna element
antenna
dielectric layer
antenna unit
disposed
Prior art date
Application number
PCT/KR2021/005875
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English (en)
Korean (ko)
Inventor
안유미
박민혁
오윤석
Original Assignee
동우화인켐 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 동우화인켐 주식회사 filed Critical 동우화인켐 주식회사
Publication of WO2021246672A1 publication Critical patent/WO2021246672A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles

Definitions

  • the present invention relates to an antenna element. More particularly, it relates to an antenna device including a conductive polymer and a metal nanowire.
  • 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.
  • an antenna may be coupled to the display device to perform a communication function.
  • an antenna for performing communication in a high-frequency or ultra-high frequency band needs to be coupled to the display device.
  • the space occupied by the antenna may also be reduced. Therefore, there is a limit to simultaneously realizing high-frequency, ultra-high frequency, and wideband signal transmission and reception in a limited space. For example, in the case of recent 5G or higher high-frequency or ultra-high frequency band communication, as the wavelength becomes shorter, the signal transmission/reception efficiency may decrease. something may be needed
  • the antenna element also needs to have improved flexibility.
  • sensing electrodes formed of a conventional metal pattern, an indium tin oxide (ITO) pattern, etc. may have mechanical defects such as cracks during a severe bending operation.
  • An object of the present invention is to provide an antenna device having excellent electrical, mechanical and optical properties.
  • An object of the present invention is to provide a display device including an antenna element having excellent electrical, mechanical and optical properties.
  • dielectric layer and an antenna unit formed on the upper surface of the dielectric layer and including a conductive polymer and a metal nanowire.
  • the conductive polymer comprises PEDOT-PSS (poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate)).
  • the antenna unit includes a radiator, a transmission line branched by being connected to the radiator, and a signal pad connected to an end of the transmission line.
  • radiator and the transmission line include the conductive polymer and the metal nanowire, and the signal pad has a solid metal pattern structure.
  • the upper surface of the dielectric layer includes a first portion and a curved second portion facing the first portion in a thickness direction, and the curved surface is between the first portion and the second portion provided as an intermediary surface to the antenna element.
  • the antenna element according to 1 above further comprising a dummy pattern disposed around the antenna unit on the upper surface of the dielectric layer.
  • the inorganic intermediate layer includes a metal oxide or a silicon oxide.
  • a display device comprising the above antenna element of 1 stacked on the display panel.
  • the antenna device is formed on the upper surface of the dielectric layer and may include an antenna unit including a conductive polymer and a metal nanowire, and may have improved flexibility, electrical conductivity, and optical properties.
  • the upper surface of the dielectric layer may include a curved surface, and the antenna unit may be curved together along the curved surface.
  • the antenna unit due to the excellent flexibility of the antenna unit including the conductive polymer and the metal nanowire, it may have resistance to bending and may be advantageous for application to flexible displays as well as flat panel displays.
  • the antenna element may further include a dummy pattern disposed around it.
  • the antenna unit may exhibit improved flexibility and optical characteristics, it is possible to more effectively prevent the user from seeing the antenna element in a display device to which the antenna element is applied.
  • FIG. 1 is a schematic plan view showing an antenna element according to exemplary embodiments.
  • FIG. 2 is a schematic plan view illustrating an antenna element according to some exemplary embodiments.
  • 3 and 4 are schematic side views illustrating an antenna element according to some exemplary embodiments.
  • 5 to 7 are schematic cross-sectional views illustrating an antenna element according to some exemplary embodiments.
  • FIG. 8 is a schematic side view illustrating a display device according to example embodiments.
  • FIG. 9 is a schematic plan view illustrating a display device according to example embodiments.
  • Embodiments of the present invention provide an antenna element formed on an upper surface of a dielectric layer and including an antenna unit including a conductive polymer and a metal nanowire. Also, embodiments of the present invention provide a display device including the antenna element. .
  • the antenna element may be, for example, a microstrip patch antenna manufactured in the form of a transparent film.
  • the film antenna may be applied to, for example, a communication device for 3G, 4G, or 5G mobile communication.
  • first direction and second direction two directions parallel to the upper surface 105 of the dielectric layer 100 and intersecting each other are defined as a first direction and a second direction.
  • first direction and the second direction may cross each other perpendicularly.
  • a direction perpendicular to the top surface of the dielectric layer 100 is defined as a third direction.
  • 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
  • third direction may correspond to a thickness direction of the antenna element.
  • 1 and 2 are schematic plan views illustrating an antenna element according to exemplary embodiments.
  • the antenna element may include a dielectric layer 100 and an antenna unit 120 .
  • the dielectric layer 100 may include an insulating material having a predetermined dielectric constant.
  • it may include a transparent resin material having flexibility to be folded. Accordingly, it is possible to easily implement the dielectric layer 100 including a curved surface through bending.
  • 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-based
  • 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 .
  • OCA optically clear adhesive
  • OCR optically clear resin
  • the dielectric layer 100 may include an inorganic insulating material such as glass, silicon oxide, silicon nitride, silicon oxynitride, glass, or the like.
  • 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, the driving frequency is excessively reduced, so that driving in a desired high frequency band may not be realized.
  • the dielectric constant of the dielectric layer 100 may range from about 2 to 10.
  • the antenna unit 120 may be formed on the top surface 105 of the dielectric layer.
  • the antenna unit 120 may include a conductive polymer and a metal nanowire.
  • optical properties (light transmittance, etc.) and mechanical properties (flexibility, etc.) derived from the conductive polymer compound and electrical properties (low resistance properties, electrical durability, etc.) derived from the metal nanowire may be implemented together.
  • the conductive polymer a material commonly used in the display field and the sensor field may be used without any particular limitation.
  • the conductive polymer may include a polythiophene-based compound, a polypyrrole-based compound, or a polyaniline-based compound.
  • the conductive polymer may include a polythiophene-based compound.
  • the conductive polymer may include PEDOT-PSS (poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate)). In this case, light transmittance, haze, and low resistance characteristics may be improved together.
  • the polythiophene-based compound may include poly(stryrenesulfonate) (PSS).
  • PSS poly(stryrenesulfonate)
  • the polythiophene-based compound may form a complex with PSS.
  • the polythiophene-based compound may include a PEDOT:PSS complex to implement excellent electrical conductivity and light transmittance.
  • the metal nanowire a material commonly used in the display field and the sensor field may be used without any particular limitation.
  • the metal nanowire may include a silver (Ag) nanowire.
  • the metal nanowire may improve electrical conductivity and electrical durability of the antenna unit 120 .
  • the metal nanowire may be substantially uniformly mixed with the conductive polymer, and may be uniformly distributed over the entire area of the antenna unit 120 .
  • the average diameter of the metal nanowires may be 50 nm or less. When the average diameter exceeds 50 nm, light transmittance of the antenna unit 120 may decrease and reflectance may increase.
  • the average length of the metal nanowires may be 10 ⁇ m or more.
  • the average length is less than 10 ⁇ m, the formation of a conductive path in which a plurality of silver nanowires are directly or indirectly connected may be inhibited. Accordingly, durability against electrical overload of the antenna unit 120 may be reduced.
  • the thickness of the antenna unit 120 may be about 20 to 500 nm, preferably about 30 to 200 nm.
  • the sheet resistance of the antenna unit 120 may be about 100 ⁇ / ⁇ or less, for example, about 10 to 100 ⁇ / ⁇ .
  • the antenna unit 120 includes a radiator 122 , a transmission line 124 connected to and branching from the radiator 122 , and a signal pad 126 connected to an end of the transmission line 124 . can do.
  • the antenna unit 120 includes the conductive polymer and the metal nanowire and may have a solid structure.
  • the antenna unit 120 may have a solid island pattern shape, a polygonal pattern shape, or the like. Accordingly, it is possible to prevent a moiré phenomenon due to interference with other electronic devices such as display pixels and suppress an increase in electrode visibility.
  • the radiator 122 and the transmission line 124 may include the conductive polymer and the metal nanowire, and the signal pad 126 may have a solid metal pattern structure.
  • metal electrodes used in the art may be used without limitation, and in this case, low resistance and reduced signal loss may be realized in the connection between the antenna unit and the integrated circuit chip.
  • the radiator 122 , the transmission line 124 , and the signal pad 126 may include the conductive polymer and the metal nanowire as a whole. In this case, the manufacturing process of the antenna element including the antenna unit 120 may be further simplified.
  • FIGS. 3 and 4 are schematic side views illustrating an antenna element according to some exemplary embodiments. A detailed description of structures and configurations substantially the same as or similar to those described with reference to FIGS. 1 and 2 will be omitted.
  • the antenna unit 120 is formed on the upper surface 105 of the dielectric layer and may be bent together with the dielectric layer.
  • the upper surface 105 of the dielectric layer includes a first portion 105a and a second portion 105b that is curved to face the first portion 105a in a thickness direction, and the curved surface ( 105c may be provided as an intermediate surface between the first portion 105a and the second portion 105b.
  • the antenna unit 120 is disposed on at least two of the first portion 105a, the second portion 105b, and the curved surface 105c of the upper surface 105 of the dielectric layer to have a bent structure. .
  • the upper surface 105 of the dielectric layer 100 includes a curved surface 105c, and the antenna unit 120 may be curved together along the curved surface 105c.
  • the flexibility of the antenna unit 120 including the conductive polymer and the metal nanowire may be improved. Accordingly, the occurrence of cracks due to bending can be prevented.
  • the antenna unit 120 is formed on the upper surface 105 of the dielectric layer and is disposed on at least two of the first portion 105a, the second portion 105b, and the curved surface 105c to have a bent structure.
  • the positions of the radiator 122 , the transmission line 124 , and the signal pad 126 are not particularly limited.
  • the radiator 122 is disposed on the first portion 105a
  • the transmission line 124 is disposed on the intermediate surface 105c
  • the signal pad 126 is disposed on the second portion 105b ) can be placed on
  • the radiator 122 is disposed on the intermediate surface 105c
  • the signal pad 126 is disposed on the second portion 105b
  • the transmission line 124 is disposed on the intermediate surface 105c. and over the second portion 105b.
  • the curved surface (eg, the intermediate surface 105c) of the dielectric layer 100 may have a curved shape.
  • the perimeter of the side of the dielectric layer 100 may have a curved profile substantially like a semicircle.
  • the antenna element may be formed in a curved shape along the flat or curved LCD panel and the OLED panel.
  • FIGS. 5 to 7 are schematic cross-sectional views illustrating an antenna element according to some exemplary embodiments. Detailed descriptions of structures and configurations substantially the same as or similar to those described with reference to FIGS. 1 to 4 will be omitted.
  • the antenna element may further include a dummy pattern 130 .
  • the dummy pattern 130 is formed on the upper surface 105 of the dielectric layer and may be disposed around the antenna unit 120 .
  • the dummy pattern 130 and the antenna unit 120 may be formed on the same level.
  • the dummy pattern 130 may include etched metal nanowires.
  • the dummy pattern 130 has higher resistance and lower electrical conductivity than the antenna unit 120 , and for example, may be substantially provided as an insulator.
  • the dummy pattern 130 may include a conductive polymer that is substantially the same as or similar to that of the antenna unit 120 .
  • the number of metal nanowires included per unit volume of the antenna unit 120 may be greater than the number of metal nanowires included in the dummy pattern 130 .
  • the metal nanowires may be substantially removed or excluded from the dummy pattern 130 .
  • the conductive polymer layer included in the dummy pattern 130 may include cracks therein.
  • the cracks block the electron movement path of the conductive polymer layer, so that the dummy pattern 130 may have low conductivity or substantially non-conductivity.
  • the dummy patterns 130 may be disposed to be spaced apart from each other around the antenna unit 120 .
  • the dummy pattern 130 may include a solid structure having substantially the same physical properties and shape as those of the antenna unit 120 . Accordingly, by uniformizing the electrode arrangement around the antenna unit 120 , it is possible to prevent the user of the display device to which the antenna element is applied from being visually recognized. Also, since the dummy pattern 130 is spaced apart from the antenna unit 120 , it may not be electrically connected.
  • sidewalls of the antenna unit 120 and the dummy pattern 130 may contact each other, and the antenna unit 120 and the dummy pattern 130 may have the same height as each other. can have
  • a space between the neighboring antenna units 120 may be filled by the dummy pattern 130 .
  • the plurality of antenna units 120 and the dummy patterns 130 may be alternately arranged in contact with each other.
  • the electrode visibility phenomenon may be reduced or suppressed.
  • the metal nanowire may be substantially excluded from the dummy pattern 130 , it is possible to prevent electrode visibility caused by light reflection of the metal nanowire.
  • an intermediate layer 110 may be further disposed between the dielectric layer 100 and the antenna unit 120 .
  • the intermediate layer 110 may be disposed on the top surface 105 of the dielectric layer 100
  • the antenna unit 120 may be disposed on the top surface of the intermediate layer 110 .
  • the intermediate layer 110 may be an organic intermediate layer or an inorganic intermediate layer.
  • the organic intermediate layer may include an epoxy-based resin, an acrylic resin, or a melanin-based resin formed through thermal curing or UV curing.
  • a transparent coating layer using a siloxane-based resin such as polydimethylsiloxane (PDMS), a polyimide-based resin, or a polyurethane-based resin may be included.
  • the above-described resin material included in the organic intermediate layer may be combined with a conductive polymer and/or binder resin included in the antenna unit 120 with high affinity. Accordingly, the organic intermediate layer may be formed between the dielectric layer 100 and the antenna unit 120 to support the antenna unit 120 . Accordingly, since the antenna unit 120 is supported by the organic intermediate layer 110 even when the antenna element is bent, the antenna unit 120 can be prevented from falling off, and the flexible characteristic of the antenna element can be improved. .
  • the inorganic intermediate layer 110 may include an inorganic oxide such as a metal oxide or a silicon oxide.
  • an inorganic oxide such as a metal oxide or a silicon oxide.
  • Aluminum oxide, zirconium oxide, titanium oxide, indium oxide, tin oxide, etc. are mentioned as an example of the said metal oxide.
  • the metal nanowires included in the antenna unit 120 may be concentrated to be adjacent to the inorganic oxide layer. Accordingly, a concentration gradient in which the number or concentration of the metal nanowires decreases from the interface between the antenna unit 120 and the inorganic oxide layer toward the upper surface of the antenna unit 120 may be formed.
  • FIG. 8 is a schematic side view illustrating a display device according to example embodiments.
  • the above-described antenna element may be disposed on the display panel 50 .
  • the dielectric layer 100 may be curved along a sidewall profile of the display panel 50 .
  • the antenna unit 120 formed on the dielectric layer 100 is also bent along the sidewall of the display panel 50 , and the antenna element may be mounted on the side surface of the display device.
  • the display panel 50 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 50 . Accordingly, the conductive member of the display panel 50 may be used as the ground layer without the need to separately form the ground layer of the antenna unit 120 by using the curved OLED as the display panel 50 .
  • FIG. 9 is a schematic plan view illustrating a display device according to example embodiments.
  • the display apparatus 200 may include a display area 210 and a peripheral area 220 .
  • the peripheral area 220 may be disposed on both sides and/or both ends of the display area 210 .
  • the peripheral region 220 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 220 .
  • the antenna element according to the above-described exemplary embodiments may be inserted into the peripheral region 220 in the form of, for example, an antenna film or an antenna patch. Since the antenna element can be arranged three-dimensionally through the side surface as described above, the area or volume of the peripheral region 220 can be reduced and the size of the display region 210 on which an image is displayed can be relatively increased. have.
  • the antenna element may be located at least partially in the display area 210 .
  • the antenna unit 120 having a solid structure is not easily recognized by the user, and thus image quality may be prevented from being deteriorated by the antenna unit.
  • An antenna unit was formed by coating and patterning a composition containing silver nanowires (AgNW, average diameter 20 nm, average length 20 ⁇ m) and PEDOT:PSS on the top surface of the dielectric layer having a thickness of 100 nm.
  • the content of PEDOT:PSS and AgNW in the composition was 0.5% by weight, respectively, based on the solid content, and the binder resin was a mixture of water and a solvent of alcohol.
  • An antenna element was manufactured while changing the thickness of the antenna unit.
  • An antenna unit having a mesh structure having unit cells in a rhombus shape was formed using an alloy (APC) of silver (Ag), palladium (Pd) and copper (Cu) on the upper surface of the dielectric layer having a thickness of 100 nm.
  • the line width of the electrode line included in the mesh structure was 2.5 ⁇ m, and the electrode pattern was prepared while changing the thickness.
  • compositions for forming an antenna unit of Examples 1 to 4 an antenna unit having a thickness of 200 nm was formed in the same manner except that PEDOT:PSS was omitted and the content of AgNW was changed to 1% by weight.
  • antenna element bending characteristics, sheet resistance and visibility of conductive patterns were evaluated.
  • the bending characteristics were measured by bending the antenna element from 5R to 0.5R 100 times and then measuring the radius of curvature at which cracks occur when observing the surface.
  • the visibility was assigned a score by observing the antenna element to 10 panelists, with 0 points indicating that the antenna element was visually recognized and 10 points indicating that the antenna element was not recognized at all. Thereafter, the evaluation scores were averaged to evaluate the visibility.
  • Example 1 Film thickness (nm) cracking curvature Sheet resistance ( ⁇ / ⁇ ) poet evaluation
  • Example 1 200 no cracks 10.1 9
  • Example 2 100 no cracks 25.6 9
  • Example 3 60 no cracks 37.9 9.5
  • Example 4 35 no cracks 67.5 10
  • Comparative Example 1 200 2R 10.0 5.5
  • Comparative Example 2 100 2.5R 24.2 5.5
  • Comparative Example 3 200 1R 35.6 5
  • the electrode visibility was remarkably improved while maintaining the transmittance and sheet resistance similar to those of the comparative examples.
  • resistance to repeated bending was significantly improved in the case of the antenna elements of the Examples.

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Abstract

Des modes de réalisation de la présente invention concernent un élément d'antenne comprenant des unités d'antenne formées sur une surface supérieure d'une couche diélectrique et comportant un polymère conducteur et un nanofil métallique. De plus, des modes de réalisation de la présente invention concernent un dispositif d'affichage comportant l'élément d'antenne.
PCT/KR2021/005875 2020-06-01 2021-05-11 Élément d'antenne WO2021246672A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020200065822A KR102180953B1 (ko) 2020-06-01 2020-06-01 안테나 소자
KR10-2020-0065822 2020-06-01

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WO2021246672A1 true WO2021246672A1 (fr) 2021-12-09

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WO (1) WO2021246672A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102180953B1 (ko) * 2020-06-01 2020-11-19 동우 화인켐 주식회사 안테나 소자
KR102285108B1 (ko) * 2021-01-05 2021-08-02 동우 화인켐 주식회사 안테나 패키지 및 이를 포함하는 화상 표시 장치
KR102258790B1 (ko) * 2021-01-14 2021-05-28 동우 화인켐 주식회사 안테나 소자 및 이를 포함하는 화상 표시 장치
KR20230084389A (ko) 2021-12-03 2023-06-13 삼성디스플레이 주식회사 표시 장치

Citations (5)

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Publication number Priority date Publication date Assignee Title
US20120268338A1 (en) * 2006-09-25 2012-10-25 Seunghyup Yoo Conducting polymer antenna
KR20190027929A (ko) * 2016-09-23 2019-03-15 후지필름 가부시키가이샤 휴대 통신 단말
KR20190105813A (ko) * 2018-03-06 2019-09-18 동우 화인켐 주식회사 필름 안테나 및 이를 포함하는 디스플레이 장치
KR20200016003A (ko) * 2018-08-06 2020-02-14 동우 화인켐 주식회사 고주파용 필름 전송 선로, 이를 포함하는 안테나 및 안테나가 결합된 화상 표시 장치
KR102180953B1 (ko) * 2020-06-01 2020-11-19 동우 화인켐 주식회사 안테나 소자

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KR20160059291A (ko) 2014-11-18 2016-05-26 주식회사 에이치시티엠 디스플레이 점착층에 형성된 안테나 장치 및 그 제조방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120268338A1 (en) * 2006-09-25 2012-10-25 Seunghyup Yoo Conducting polymer antenna
KR20190027929A (ko) * 2016-09-23 2019-03-15 후지필름 가부시키가이샤 휴대 통신 단말
KR20190105813A (ko) * 2018-03-06 2019-09-18 동우 화인켐 주식회사 필름 안테나 및 이를 포함하는 디스플레이 장치
KR20200016003A (ko) * 2018-08-06 2020-02-14 동우 화인켐 주식회사 고주파용 필름 전송 선로, 이를 포함하는 안테나 및 안테나가 결합된 화상 표시 장치
KR102180953B1 (ko) * 2020-06-01 2020-11-19 동우 화인켐 주식회사 안테나 소자

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