WO2023171718A1 - Antenne et dispositif d'affichage - Google Patents

Antenne et dispositif d'affichage Download PDF

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Publication number
WO2023171718A1
WO2023171718A1 PCT/JP2023/008871 JP2023008871W WO2023171718A1 WO 2023171718 A1 WO2023171718 A1 WO 2023171718A1 JP 2023008871 W JP2023008871 W JP 2023008871W WO 2023171718 A1 WO2023171718 A1 WO 2023171718A1
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WO
WIPO (PCT)
Prior art keywords
conductor
terminal
antenna
pattern
layer
Prior art date
Application number
PCT/JP2023/008871
Other languages
English (en)
Japanese (ja)
Inventor
謙一 手塚
康正 張原
智之 五井
芽衣 深谷
Original Assignee
Tdk株式会社
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.)
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Application filed by Tdk株式会社 filed Critical Tdk株式会社
Publication of WO2023171718A1 publication Critical patent/WO2023171718A1/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
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction

Definitions

  • the present disclosure relates to an antenna and a display device.
  • an antenna including a radiation pattern and a power feeding transmission line connected to the radiation pattern is known (for example, Patent Document 1).
  • a ground pad portion is formed at the end of the transmission line opposite to the radiation pattern.
  • the ground pad portions are arranged separately for each antenna. Such antennas are required to ensure electrical stability.
  • an object of the present disclosure is to provide an antenna and a display device that can ensure electrical stability.
  • An antenna includes a base material, an antenna pattern configured of a conductor pattern arranged on one main surface of the base material, and a conductor pattern arranged on one main surface of the base material.
  • the antenna pattern includes a radiation conductor, a first feed line and a second feed line that are drawn out from the radiation conductor toward the end side of the base material and feed the radiation conductor. It has a line, and a first terminal and a second terminal connected to the first feed line and the second feed line, respectively, and the ground pattern is between the first terminal and the second terminal. a first side portion arranged to sandwich the first terminal between the center portion; and a first side portion arranged to sandwich the second terminal between the center portion.
  • first connecting portion connecting the central portion and the first side portion; and a second connecting portion connecting the central portion and the second side portion;
  • the connecting portion extends between the first terminal and the end of the base material on one main surface of the base material, and the second connecting portion extends on one main surface of the base material. , extending between the second terminal and the end of the substrate.
  • a display device includes the above-described antenna.
  • an antenna and a display device that can ensure electrical stability.
  • FIG. 1 is a plan view showing an embodiment of a conductive film including an antenna.
  • 2 is a sectional view taken along line II-II in FIG. 1.
  • FIG. FIG. 7 is a cross-sectional view showing an antenna according to a modification.
  • FIG. 1 is a cross-sectional view showing an embodiment of a display device.
  • FIG. 3 is a plan view of the antenna.
  • 6 is a sectional view taken along line VI-VI in FIG. 5.
  • FIG. This is an antenna with a plurality of antenna patterns and ground patterns lined up.
  • FIG. 7 is a plan view of an antenna according to a modified example.
  • FIG. 1 is a plan view showing a conductive film including an antenna according to an embodiment of the present disclosure
  • FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1.
  • the conductive film 20 shown in FIGS. 1 and 2 includes a film-like light-transmitting base material 1 (base material) and a conductive layer 5 provided on one main surface 1S of the light-transmitting base material 1. and a light-transparent resin layer 7B provided on one main surface 1S of the light-transparent base material 1.
  • the conductive layer 5 includes a conductor portion 3 including a portion having a pattern that extends in a direction along the main surface 1S of the light-transmitting substrate 1 and includes a plurality of openings 3a, and fills the inside of the opening 3a of the conductor portion 3. It has an insulating resin part 7A.
  • the conductive layer 5 is shown in a deformed state, and the width of the conductor portion 3 is shown in an emphasized state.
  • the thickness of each layer is also shown in a deformed state. Details of the thickness of each layer will be described later. Further, in the example shown in FIG. 1, the conductive layer 5 is formed near one short side of the conductive film 20, but the position where the conductive layer 5 is formed is not particularly limited, and is formed near the long side. A conductive layer 5 may also be formed.
  • the light-transmitting base material 1 has a level of light-transmitting property required when the conductive film 20 is incorporated into a display device. Specifically, the total light transmittance of the light-transmitting substrate 1 may be 90 to 100%. The haze of the light-transmitting substrate 1 may be 0 to 5%.
  • the light-transmitting substrate 1 may be, for example, a transparent resin film, and examples thereof include polyethylene terephthalate (PET), polycarbonate (PC), polyethylene naphthalate (PEN), cycloolefin polymer (COP), or polyimide. (PI) film is mentioned.
  • the light-transmissive base material 1 may be a glass substrate.
  • the light-transmitting substrate 1 is a laminate including a light-transmitting support film 11, and an intermediate resin layer 12 and a base layer 13 provided in this order on the support film 11. Good too.
  • the support film 11 may be the transparent resin film described above.
  • the base layer 13 is a layer provided to form the conductor portion 3 by electroless plating or the like. When forming the conductor portion 3 by another method, the base layer 13 does not necessarily need to be provided.
  • the intermediate resin layer 12 may not be provided between the support film 11 and the base layer 13.
  • the thickness of the light-transmitting substrate 1 or the support film 11 constituting it may be 10 ⁇ m or more, 20 ⁇ m or more, or 35 ⁇ m or more, and may be 500 ⁇ m or less, 200 ⁇ m or less, or 100 ⁇ m or less.
  • the adhesion between the support film 11 and the base layer 13 can be improved.
  • the intermediate resin layer 12 is provided between the support film 11 and the light-transparent resin layer 7B, thereby improving the adhesion between the support film 11 and the light-transparent resin layer 7B. It can be improved.
  • the intermediate resin layer 12 may be a layer containing a resin and an inorganic filler.
  • An example of the resin constituting the intermediate resin layer 12 is acrylic resin.
  • An example of an inorganic filler is silica.
  • the thickness of the intermediate resin layer 12 may be, for example, 5 nm or more, 100 nm or more, or 200 nm or more, or 10 ⁇ m or less, 5 ⁇ m or less, or 2 ⁇ m or less.
  • the base layer 13 may be a layer containing a catalyst and a resin.
  • the resin may be a cured product of a curable resin composition.
  • curable resins contained in the curable resin composition include amino resins, cyanate resins, isocyanate resins, polyimide resins, epoxy resins, oxetane resins, polyesters, allyl resins, phenolic resins, benzoxazine resins, xylene resins, and ketones.
  • Resin furan resin, COPNA resin, silicone resin, dichloropentadiene resin, benzocyclobutene resin, episulfide resin, ene-thiol resin, polyazomethine resin, polyvinylbenzyl ether compound, acenaphthylene, as well as unsaturated double bond, cyclic ether, and ultraviolet curing resins containing a functional group that causes a polymerization reaction with ultraviolet light, such as vinyl ether.
  • the catalyst included in the base layer 13 may be an electroless plating catalyst.
  • the electroless plating catalyst may be a metal selected from Pd, Cu, Ni, Co, Au, Ag, Pd, Rh, Pt, In, and Sn, or may be Pd.
  • the catalyst may be used alone or in combination of two or more types. Typically, the catalyst is dispersed in the resin as catalyst particles.
  • the content of the catalyst in the base layer 13 may be 3% by mass or more, 4% by mass or more, or 5% by mass or more, and 50% by mass or less, 40% by mass or less, or It may be 25% by mass or less.
  • the thickness of the base layer 13 may be 10 nm or more, 20 nm or more, or 30 nm or more, and may be 500 nm or less, 300 nm or less, or 150 nm or less.
  • the light-transmitting base material 1 may further include a protective layer provided on the main surface of the support film 11 on the opposite side to the light-transmitting resin layer 7B and the conductor portion 3. By providing the protective layer, damage to the support film 11 is suppressed.
  • the protective layer can be a layer similar to the intermediate resin layer 12.
  • the thickness of the protective layer may be 5 nm or more, 50 nm or more, or 500 nm or more, and may be 10 ⁇ m or less, 5 ⁇ m or less, or 2 ⁇ m or less.
  • the conductor portion 3 constituting the conductive layer 5 includes a portion having a pattern including an opening 3a.
  • the pattern including the openings 3a includes a mesh pattern including a plurality of regularly arranged openings 3a formed by a plurality of linear portions that intersect with each other.
  • the conductor portion 3 having a mesh-like pattern functions as a radiation conductor and a feed line of an antenna 200, which will be described later.
  • the conductor portion 3 includes a solid planar pattern without openings 3a, or a pattern that is a combination of a solid planar pattern on a mesh pattern.
  • the conductor portion 3 having a planar pattern functions as a terminal pad portion and a ground pattern, which will be described later. Note that details of the structure of the pattern of the conductor portion 3 in the conductive layer 5 will be described later.
  • the conductor portion 3 may contain metal.
  • the conductor portion 3 may contain at least one metal selected from copper, nickel, cobalt, palladium, silver, gold, platinum, and tin, and may also contain copper.
  • the conductor portion 3 may be metal plated by a plating method.
  • the conductor portion 3 may further contain a nonmetallic element such as phosphorus within a range where appropriate conductivity is maintained.
  • the conductor portion 3 may be a laminate composed of multiple layers. Further, the conductor portion 3 may have a blackened layer as a surface layer portion on the opposite side from the light-transmitting base material 1. The blackening layer can contribute to improving the visibility of a display device incorporating a conductive film.
  • the insulating resin part 7A is made of a resin having light transmittance, and is provided to fill the opening 3a of the conductor part 3. Usually, the insulating resin part 7A and the conductor part 3 form a flat surface. has been done.
  • the light-transmitting resin layer 7B is formed of a resin having light-transmitting properties.
  • the total light transmittance of the light-transmitting resin layer 7B may be 90 to 100%.
  • the haze of the light-transmitting resin layer 7B may be 0 to 5%.
  • the difference between the refractive index of the light-transmissive base material 1 (or the refractive index of the support film constituting the light-transparent base material 1) and the refractive index of the light-transparent resin layer 7B may be 0.1 or less. This makes it easier to ensure good visibility of the displayed image.
  • the refractive index (nd25) of the light-transmitting resin layer 7B may be, for example, 1.0 or more, 1.7 or less, 1.6 or less, or 1.5 or less.
  • the refractive index can be measured using a reflection spectroscopic film thickness meter. From the viewpoint of uniformity of optical path length, the conductor portion 3, the insulating resin portion 7A, and the light-transmitting resin layer 7B may have substantially the same thickness.
  • the resin forming the insulating resin portion 7A and the light-transmitting resin layer 7B may be a cured product of a curable resin composition (a photocurable resin composition or a thermosetting resin composition).
  • the curable resin composition forming the insulating resin portion 7A and/or the light-transmitting resin layer 7B includes a curable resin, and examples thereof include acrylic resin, amino resin, cyanate resin, isocyanate resin, polyimide resin, and epoxy resin.
  • Resin oxetane resin, polyester, allyl resin, phenolic resin, benzoxazine resin, xylene resin, ketone resin, furan resin, COPNA resin, silicon resin, dichloropentadiene resin, benzocyclobutene resin, episulfide resin, ene-thiol resin, poly
  • examples include azomethine resin, polyvinylbenzyl ether compound, acenaphthylene, and ultraviolet curable resins containing functional groups that cause a polymerization reaction with ultraviolet rays, such as unsaturated double bonds, cyclic ethers, and vinyl ethers.
  • the resin forming the insulating resin portion 7A and the resin forming the light-transmitting resin layer 7B may be the same. Since the insulating resin portion 7A and the light-transmitting resin layer 7B made of the same resin have the same refractive index, the uniformity of the optical path length passing through the conductive film 20 can be further improved.
  • the insulating resin portion 7A and the resin forming the light-transmitting resin layer 7B are the same, the insulating resin portion 7A can be formed by forming a pattern from one curable resin layer by imprinting or the like, for example. and the light-transmitting resin layer 7B can be easily formed all at once.
  • the conductive film 20 can be manufactured, for example, by a method including pattern formation using an imprint method.
  • An example of a method for manufacturing the conductive film 20 is to prepare a light-transmitting base material 1 having a support film and a base layer containing an intermediate resin layer and a catalyst provided on one main surface of the support film.
  • a curable resin layer is formed on the main surface 1S of the light-transmitting substrate 1 on the base layer side, and a trench in which the base layer is exposed is formed by an imprint method using a mold having a convex portion. and forming the conductor portion 3 filling the trench by an electroless plating method in which metal plating is grown from a base layer.
  • the insulating resin part 7A and the light-transmitting resin layer 7B having a pattern including openings having an inverted shape of the convex parts of the mold are formed. Formed all at once.
  • the method for forming the insulating resin portion 7A having a pattern including openings is not limited to the imprint method, and any method such as photolithography can be applied.
  • FIG. 4 is a cross-sectional view showing one embodiment of a display device incorporating a conductive film.
  • the display device 100 shown in FIG. 4 includes an image display section 10 having an image display area 10S, a dielectric layer 15, a conductive film 20 (antenna 200), a polarizing plate 30, and a cover glass 40.
  • the image display section 10 functions as a ground conductor for the antenna 200 of the conductive film 20.
  • the planar transparent antenna 200 has a configuration of a patch antenna.
  • the dielectric layer 15, the conductive film 20, the polarizing plate 30, and the cover glass 40 are laminated in this order from the image display section 10 side on the image display area 10S side of the image display section 10.
  • the configuration of the display device is not limited to the form shown in FIG. 4, and can be modified as necessary.
  • the polarizing plate 30 may be provided between the image display section 10 and the conductive film 20.
  • the image display section 10 may be, for example, a liquid crystal display section.
  • the polarizing plate 30 and the cover glass 40 those commonly used in display devices can be used.
  • the polarizing plate 30 and the cover glass 40 do not necessarily need to be provided.
  • Light for image display emitted from the image display area 10S of the image display section 10 passes through a path including the conductive film 20 and having a highly uniform optical path length. Thereby, it is possible to display a good image with high uniformity in which moire is suppressed.
  • Antenna 200 includes the conductive layer 5 described above.
  • FIG. 5 is a plan view of antenna 200.
  • FIG. 5 shows an enlarged portion of the antenna.
  • the XY coordinates are set on a plane parallel to the main surface 1S.
  • the X-axis direction is a direction parallel to the main surface 1S, and a direction along the end 1a of the light-transmitting base material 1.
  • the Y-axis direction is a direction parallel to the main surface 1S and perpendicular to the X-axis direction.
  • the center side of the conductive film 20 is defined as the positive side in the Y-axis direction, and the outer peripheral side of the conductive film 20 is defined as the negative side in the Y-axis direction.
  • the X-axis direction is a direction perpendicular to the Y-axis direction along the main surface 1S, and one side on which the end portion 1a extends is defined as the positive side in the X-axis direction, and the other side is defined as the negative side in the X-axis direction.
  • the conductive layer 5 of the antenna 200 includes an antenna pattern 201 and a ground pattern 202.
  • the antenna pattern 201 is a pattern composed of a conductive pattern arranged on one main surface 1S of the light-transmissive base material 1.
  • the ground pattern 202 is a pattern composed of a conductor pattern arranged on one main surface 1S of the light-transmissive base material 1.
  • the antenna pattern 201 includes a radiation conductor 21, a first feed line 22A, a second feed line 22B, a first terminal pad part 23A (first terminal), and a second terminal pad part 23B (first terminal). 2 terminals).
  • the ground pattern 202 has a center portion 24A, a first side portion 24B, a second side portion 24C, a first connection portion 24D, and a second connection portion 24E.
  • the antenna 200 has a configuration that is axisymmetric with respect to a center line CL that is parallel to the Y-axis direction.
  • the radiation conductor 21 is a region that radiates signals as an antenna.
  • the radiation conductor 21 has a circular shape.
  • the center of the radiation conductor 21 is placed on the center line CL.
  • the radiation conductor 21 is arranged at a position spaced apart from the end portion 1a of the light-transmitting substrate 1 toward the positive side in the Y-axis direction.
  • the radiation conductor 21 has a diameter R. Note that the radiation conductor 21 does not need to have a circular shape, and may have a rectangular shape or a square shape, or may have a polygonal shape other than a rectangle or a square.
  • the feed lines 22A and 22B are lines that feed power to the radiation conductor 21.
  • antenna 200 functions as a dual polarization antenna.
  • a diagonally polarized signal in the direction in which the inclined portion 22b of the first feed line 22A extends is fed via the first feed line 22A, and a diagonally polarized signal in the direction in which the inclined portion 22b of the second feed line 22B extends.
  • the wave signal can be fed via the second feed line 22B.
  • the feed lines 22A, 22B have a vertical portion 22a extending perpendicularly to the end 1a of the light-transmissive base material 1, and an inclined portion 22b inclined with respect to the Y-axis direction.
  • the vertical portion 22a of the first feed line 22A extends from the terminal pad portion 23A formed on the end portion 1a side of the light-transmitting substrate 1 toward the positive side in the Y-axis direction.
  • the vertical portion 22a of the first feed line 22A extends parallel to the center line CL (ie, the Y-axis direction) at a position spaced apart from the center line CL on the negative side in the X-axis direction.
  • the inclined portion 22b of the first feed line 22A moves from the positive end of the vertical portion 22a in the Y-axis direction toward the center line CL (i.e., toward the positive side in the X-axis direction) as it goes toward the positive side in the Y-axis direction. Lean closer.
  • the positive end of the inclined portion 22b of the first feed line 22A in the Y-axis direction is connected to the outer peripheral edge 21a of the radiation conductor 21.
  • the first feed line 22A has a constant width W1 in the vertical portion 22a and the inclined portion 22b. Further, the first feed line 22A has a line length L1 that is the total length of the vertical portion 22a and the inclined portion 22b.
  • the width dimension W1 is the dimension in the in-plane direction of the planar antenna 200 in a direction perpendicular to the extending direction of the vertical portion 22a and the inclined portion 22b
  • the line length L1 is the dimension in the in-plane direction of the planar antenna 200. This is the dimension along the extending direction of the vertical portion 22a and the inclined portion 22b in the inward direction.
  • the vertical portion 22a of the first feed line 22A is arranged at a position farther away from the negative end of the radiation conductor 21 in the X-axis direction toward the negative side in the X-axis direction. Ru. Further, the positive end of the vertical portion 22a of the first feed line 22A in the Y-axis direction (i.e., the connection portion with the inclined portion 22b) is smaller than the negative end of the radiation conductor 21 in the Y-axis direction. It is arranged at a position spaced apart toward the negative side in the Y-axis direction.
  • the arrangement and shape of the vertical portion 22a and the inclined portion 22b are not particularly limited.
  • the second feed line 22B has a line-symmetrical structure with the first feed line 22A with respect to the center line CL.
  • the inclined part 22b of the first feed line 22A and the inclined part 22b of the second feed line 22B are connected to a virtual line extending the inclined part 22b of the first feed line 22A and the second feed line 22B.
  • the radiating conductor 21 is connected to the outer peripheral edge 21a of the radiation conductor 21 so that the imaginary line extending from the inclined portion 22b is perpendicular to the imaginary line.
  • the angle formed by the imaginary line extending the inclined portion 22b of the first feed line 22A and the imaginary line extending the inclined portion 22b of the second feed line 22B is 90 degrees.
  • the terminal pad portions 23A and 23B are terminals connected to the power supply lines 22A and 22B, respectively.
  • the terminal pad portions 23A, 23B are connected to external input/output terminals to feed power to the radiation conductor 21 via the power feed lines 22A, 22B.
  • the terminal pad portions 23A and 23B are arranged near the end portion 1a of the light-transmissive base material 1.
  • the terminal pad portions 23A, 23B extend from the negative end in the Y-axis direction of the vertical portion 22a of the feed lines 22A, 22B toward the end 1a toward the negative side in the Y-axis direction.
  • the terminal pad portions 23A and 23B extend in the Y-axis direction with a constant width dimension W2.
  • the terminal pad portions 23A and 23B extend in the X-axis direction with a width dimension L2.
  • the ground pattern 202 is an area that is electrically grounded.
  • the ground pattern 202 is connected to a ground terminal (not shown).
  • the ground pattern 202 is insulated from the terminal pad parts 23A, 23B by being arranged with a gap between them.
  • the central portion 24A is arranged between the first terminal pad portion 23A and the second terminal pad portion 23B.
  • the center portion 24A is formed to extend in the X-axis direction along the end portion 1a in a region between the terminal pad portions 23A and 23B.
  • the first side portion 24B is arranged to sandwich the first terminal pad portion 23A between the first side portion 24B and the center portion 24A.
  • the first side portion 24B is formed to extend in the X-axis direction along the end portion 1a in the negative side region of the first terminal pad portion 23A in the X-axis direction.
  • the second side portion 24C is arranged to sandwich the second terminal pad portion 23B between the second side portion 24C and the center portion 24A.
  • the second side portion 24C is formed to extend in the X-axis direction along the end portion 1a in a region on the positive side of the second terminal pad portion 23B in the X-axis direction.
  • the center portion 24A and the side portions 24B and 24C extend in a band shape in the X-axis direction with a constant width dimension in the Y-axis direction.
  • the end portions of the center portion 24A and the side portions 24B and 24C on the positive side in the Y-axis direction extend parallel to the X-axis direction.
  • the positive ends of the center portion 24A and the side portions 24B and 24C in the Y-axis direction are arranged at the same position in the Y-axis direction as the positive ends of the terminal pad portions 23A and 23B in the Y-axis direction. .
  • the first connecting portion 24D connects the center portion 24A and the first side portion 24B.
  • the first connecting portion 24D extends between the first terminal pad portion 23A and the end portion 1a of the light-transmitting substrate 1 on one main surface 1S of the light-transmitting substrate 1.
  • the first connection portion 24D is formed to extend in the X-axis direction along the end portion 1a in the negative side region of the first terminal pad portion 23A in the Y-axis direction.
  • the second connecting portion 24E connects the center portion 24A and the second side portion 24C.
  • the second connecting portion 24E extends between the second terminal pad portion 23B and the end portion 1a of the light-transmitting substrate 1 on one main surface 1S of the light-transmitting substrate 1.
  • the second connection portion 24E is formed to extend in the X-axis direction along the end portion 1a in the negative side region of the second terminal pad portion 23B in the Y-axis direction.
  • the connecting portions 24D and 24E extend in a band shape in the X-axis direction with a constant width L3 in the Y-axis direction.
  • the negative ends of the central portion 24A, the side portions 24B, 24C, and the connecting portions 24D, 24E in the Y-axis direction extend parallel to the X-axis direction.
  • the negative end portions of the center portion 24A, the side portions 24B, 24C, and the connecting portions 24D, 24E in the Y-axis direction are arranged at the same position as the end portion 1a in the Y-axis direction.
  • the negative end portions of the central portion 24A, the side portions 24B, 24C, and the connecting portions 24D, 24E in the Y-axis direction are on one main surface 1S of the light-transmitting base material 1. It extends to the end 1a. Note that the ends of the central part 24A, the side parts 24B, 24C, and the connecting parts 24D, 24E on the negative side in the Y-axis direction are located on the positive side in the Y-axis direction from the end 1a of the light-transmitting base material 1. It doesn't matter if you do.
  • a width L3 of the connecting portions 24D and 24E in the Y-axis direction is smaller than a width L2 of the terminal pad portions 23A and 23B in the Y-axis direction.
  • the antenna 200 has, as the conductor portion 3, a planar conductor pattern 54 formed by solidly coating a conductive material.
  • the terminal pad portions 23A, 23B and the ground pattern 202 have a planar conductor pattern 54.
  • FIG. 6 is a schematic cross-sectional view taken along line VI-VI shown in FIG.
  • a resin layer 7 is arranged on one main surface 1S of the light-transmissive base material 1.
  • the terminal pad portions 23A, 23B include a mesh conductor layer 70 provided in a mesh-shaped trench of the resin layer 7, and a planar first plane conductor layer 71 disposed on the mesh conductor layer 70.
  • the mesh conductor layer 70 is an example of a conductor layer having a conductor pattern including a plurality of openings.
  • the mesh conductor layer 70 is a layer containing the aforementioned mesh-like conductor pattern 50.
  • a resin layer 7 is placed in the opening between the power lines.
  • the ground pattern 202 includes a second planar conductor layer 72 arranged on the resin layer 7 . Only the resin layer 7 exists in the lower layer where the second planar conductor layer 72 is arranged, and the mesh-like conductor pattern 50 does not exist.
  • the planar conductor layers 71 and 72 are planar conductor patterns formed by solidly coating a conductive material. The planar conductor layers 71 and 72 extend parallel to the main surface 1S so as to have a width wider than each conductive line of the mesh conductor layer 70.
  • FIG. 6(b) shows a layer structure with a different pattern from that in FIG. 6(a).
  • a resin layer 7 is arranged on one main surface 1S of the light-transmissive base material 1.
  • the terminal pad portions 23A, 23B and the ground pattern 202 are formed by a mesh conductor layer 70 provided in a mesh-shaped trench of the resin layer 7, and a planar first plane conductor layer 71 disposed on the mesh conductor layer 70. and has.
  • the mesh conductor layer 70 is an example of a conductor layer having a conductor pattern including a plurality of openings.
  • the thickness of the first planar conductor layer 71 is thicker than the thickness of the mesh conductor layer 70.
  • the thickness of the second planar conductor layer 72 is greater than the thickness of the mesh conductor layer 70.
  • the radiation conductor 21 and the feed lines 22A, 22B of the antenna pattern 201 are constituted only by the mesh conductor layer 70, and do not have the first plane conductor layer 71 on top. That is, the conductor thickness of the radiation conductor 21 of the antenna pattern 201 and the feed lines 22A, 22B corresponds to the thickness of the mesh conductor layer 70. Therefore, the conductor thickness of the ground pattern 202 is thicker than the thickness of the radiation conductor 21 of the antenna pattern 201 and the feed lines 22A and 22B.
  • connection parts 24D and 24E are not shown in FIG. 6, they have the same layer structure as the center part 24A and the side parts 24B and 24C. Further, in the mesh conductor layer 70, some of the conductive wires forming the mesh conductor pattern may be disconnected.
  • terminal pad portions 23A, 23B and the ground pattern 202 have a mesh-like conductor pattern 50 instead of the solid planar conductor pattern 54, similar to the radiation conductor 21 and the feed lines 22A, 22B. It may be.
  • each antenna pattern 201 is arranged so as to be spaced apart from each other at a predetermined pitch in the X-axis direction.
  • a plurality of ground patterns 202 are arranged at the position of the end portion 1a so as to extend in the X-axis direction.
  • the first side portion 24B for one of the antenna patterns 201 adjacent to each other corresponds to the second side portion 24C for the other antenna pattern 201 adjacent to each other.
  • the side portion between the first terminal pad portion 23A of one antenna pattern 201 and the second terminal pad portion 23B of the adjacent antenna pattern 201 on the negative side in the X-axis direction is It is commonly used as the side portion 24B and the second side portion 23C.
  • an antenna 200 shown in FIG. 8 may be employed.
  • An antenna 200 shown in FIG. 8 employs a radiation conductor 21 and feed lines 22A, 22B made of a solid planar conductor pattern 54 instead of the mesh-like radiation conductor 21 and feed lines 22A, 22B shown in FIG. It is something.
  • the other configuration of the antenna 200 shown in FIG. 8 is the same as that of the antenna 200 shown in FIG. 5.
  • the ground pattern 202 is arranged between the center portion 24A and the center portion 24A disposed between the first terminal pad portion 23A and the second terminal pad portion 23B.
  • a first side portion 24B is arranged to sandwich the first terminal pad portion 23A
  • a second side portion 24C is arranged to sandwich the second terminal pad portion 23B between the center portion 24A.
  • the ground pattern 202 includes a first connection portion 24D that connects the center portion 24A and the first side portion 24B, and a second connection portion 24E that connects the center portion 24A and the second side portion 24C. , has.
  • the first connecting portion 24D extends between the first terminal pad portion 23A and the end portion 1a of the light-transmitting substrate 1 on one main surface 1S of the light-transmitting substrate 1. .
  • the second connecting portion 24E extends between the second terminal pad portion 23B and the end portion 1a of the light-transmitting base material 1 on one main surface 1S of the light-transmitting base material 1. do.
  • the center of the ground pattern 202 is formed using the area between the terminal pad portions 23A, 23B and the end portion 1a of the light transmitting base material 1 on one main surface 1S of the light transmitting base material 1.
  • the portion 24A, the first side portion 24B, and the second side portion 23C can be electrically connected by the connecting portions 24D and 24E. As a result, each part of the ground pattern 202 is not electrically separated and is electrically connected, so that electrical stability in the ground pattern 202 can be ensured.
  • the ground pattern is shared on the other main surface of the base material (the main surface on the back side of the main surface 1S) (for example, Japanese Patent Publication No. 2021-518070).
  • a part of such a ground pattern is formed on the same main surface as the antenna pattern, goes around to the back side, and another part is provided on the back side of the antenna pattern.
  • the ground pattern needs to be configured with a mesh-like conductor pattern from the viewpoint of visibility, which reduces the stability of connection with the cable and causes moiré. may occur.
  • the ground pattern 202 and the antenna pattern 201 are shared on the same main surface 1S, so it is possible to reduce the manufacturing effort and cost. . Further, since the ground pattern 202 is arranged near the edge 1a of the substrate, visibility is not affected. Therefore, the ground pattern 202 can be formed of a planar conductor layer, and grounding stability can be improved. Moreover, since each part of the ground pattern 202 is connected near the terminal pad parts 23A and 23B, a large joint area with the cable can be taken, and connection reliability can be improved.
  • the width dimension L3 of the first connecting portion 24D and the second connecting portion 24E in the Y-axis direction perpendicular to the X-axis direction along the end portion 1a of the light-transmitting substrate 1 is the width dimension L3 of the first terminal in the Y-axis direction. It may be smaller than the width dimension L2 of the pad portion 23A and the second terminal pad portion 23B. In this case, the first connecting portion 24D and the second connecting portion 24E become thicker between the first terminal pad portion 23A and the second terminal pad portion 23B and the end portion 1a of the light-transmitting base material 1. You can prevent too much.
  • a plurality of antenna patterns 201 and ground patterns 202 are provided along the end portion 1a of the light-transmissive base material 1, and the first side portion 24B for one of the mutually adjacent antenna patterns 201 is a plurality of the antenna patterns 201 and the ground pattern 202. 201 may correspond to the second side 24C relative to the other side.
  • the ground patterns 202 for each antenna pattern 201 can be electrically connected to each other. Thereby, electrical stability in the ground pattern 202 can be ensured.
  • the conductor thickness of the ground pattern 202 may be thicker than the thickness of the radiation conductor 21 of the antenna pattern 201, the first feed line 22A, and the second feed line 22B. In this case, since the amount of conductors in the ground pattern 202 increases, grounding stability can be improved.
  • a resin layer 7 is arranged on one main surface 1S of the light-transmissive base material 1, and the first terminal pad section 23A and the second terminal pad section 23B are a conductive layer having a conductive pattern including a plurality of openings. and a first planar conductor layer 71 disposed on the conductor layer, and the ground pattern 202 has a second planar conductor layer 72 disposed on the resin layer 7. You may do so. In this case, the amount of conductor used in the ground pattern 202 can be reduced, and good connection with external terminals can be achieved.
  • a resin layer 7 is arranged on one main surface 1S of the light-transmissive base material 1, and the first terminal pad section 23A, the second terminal pad section 23B, and the ground pattern 202 are made of a conductor including a plurality of openings. It may include a conductor layer having a pattern and a first planar conductor layer 71 disposed on the conductor layer. In this case, the ground pattern 202 can be created by using a mesh conductor pattern.
  • the thickness of the first planar conductor layer 71 may be greater than the thickness of the conductor layer. In this case, the electrical resistance value will be reduced, and an improvement in electrical characteristics can be expected.
  • the thickness of the second planar conductor layer 72 may be greater than the thickness of the conductor layer. In this case, the electrical resistance value will be reduced, and an improvement in electrical characteristics can be expected.
  • the conductor layer may be a mesh conductor layer 70 provided in a mesh-like trench of the resin layer 7.
  • the mesh conductor layer 70 can be fabricated by using the mesh conductor pattern.
  • the display device 100 includes the antenna 200 described above.
  • a mesh conductor layer is exemplified as a conductor layer having a conductor pattern including openings.
  • the conductor pattern including openings is not limited to the mesh, and a conductor pattern including honeycomb-shaped openings or a conductor pattern including dot-shaped openings may be employed.
  • the technology according to the present disclosure includes, but is not limited to, the following configuration examples.
  • An antenna includes a base material, an antenna pattern configured of a conductor pattern arranged on one main surface of the base material, and a conductor pattern arranged on one main surface of the base material.
  • the antenna pattern includes a radiation conductor, a first feed line and a second feed line that are drawn out from the radiation conductor toward the end side of the base material and feed the radiation conductor. It has a line, and a first terminal and a second terminal connected to the first feed line and the second feed line, respectively, and the ground pattern is between the first terminal and the second terminal. a first side portion arranged to sandwich the first terminal between the center portion; and a first side portion arranged to sandwich the second terminal between the center portion.
  • first connecting portion connecting the central portion and the first side portion; and a second connecting portion connecting the central portion and the second side portion;
  • the connecting portion extends between the first terminal and the end of the base material on one main surface of the base material, and the second connecting portion extends on one main surface of the base material. , extending between the second terminal and the end of the substrate.
  • the ground pattern includes a central portion disposed between the first terminal and the second terminal, and a first ground pattern disposed such that the first terminal is sandwiched between the central portion. and a second side portion arranged to sandwich the second terminal between the center portion and the second side portion. Further, the ground pattern has a first connection portion that connects the center portion and the first side portion, and a second connection portion that connects the center portion and the second side portion.
  • the first connection portion extends between the first terminal and the end of the base on one main surface of the base. Further, the second connection portion extends between the second terminal and the end of the base material on one main surface of the base material.
  • the center, first side, and second side of the ground pattern are connected using the area between the terminal and the end of the base on one main surface of the base. It can be electrically connected by the part. As a result, each part of the ground pattern is not electrically separated and is electrically connected, so that electrical stability in the ground pattern can be ensured.
  • the width dimension of the first connection part and the second connection part in the second direction perpendicular to the first direction along the edge of the base material is the width of the first terminal and the second terminal in the second direction. It may be smaller than the width dimension of. In this case, it is possible to prevent the first connection portion and the second connection portion from becoming too thick between the first terminal and the second terminal and the end portion of the base material.
  • a plurality of antenna patterns and ground patterns are provided along the edge of the base material, and a first side of one of the adjacent antenna patterns is a second side of the other of the adjacent antenna patterns. This may apply.
  • the ground patterns for each antenna pattern can be electrically connected to each other. Thereby, electrical stability in the ground pattern can be ensured.
  • the conductor thickness of the ground pattern may be thicker than the thickness of the radiation conductor of the antenna pattern, the first feed line, and the second feed line. In this case, since the amount of conductors in the ground pattern increases, grounding stability can be improved.
  • a resin layer is disposed on one main surface of the base material, and the first terminal and the second terminal include a conductor layer having a conductor pattern including a plurality of openings, and a planar resin layer disposed on the conductor layer.
  • the ground pattern may include a second planar conductor layer disposed on the resin layer. In this case, the amount of conductor used in the ground pattern can be reduced, and good connection with external terminals can be achieved.
  • a resin layer is disposed on one main surface of the base material, and the first terminal, the second terminal, and the ground pattern are disposed on the conductor layer and the conductor layer having a conductor pattern including a plurality of openings.
  • the ground pattern can be created by using the mesh conductor pattern.
  • the thickness of the first planar conductor layer may be greater than the thickness of the conductor layer. In this case, the electrical resistance value will be reduced, and an improvement in electrical characteristics can be expected.
  • the thickness of the second planar conductor layer may be greater than the thickness of the conductor layer. In this case, the electrical resistance value will be reduced, and an improvement in electrical characteristics can be expected.
  • the conductor layer may be a mesh conductor layer provided in a mesh-like trench in the resin layer.
  • the mesh conductor layer can be fabricated by using the mesh conductor pattern.
  • a display device includes the above-described antenna.
  • the antenna pattern is a radiating conductor; a first feed line and a second feed line that are drawn out from the radiation conductor toward the end side of the base material and feed power to the radiation conductor; a first terminal and a second terminal connected to the first feed line and the second feed line, respectively;
  • the ground pattern is a central portion disposed between the first terminal and the second terminal; a first side portion arranged to sandwich the first terminal between the first side portion and the center portion; a second side portion arranged to sandwich the second terminal between the second side portion and the center portion; a first connecting portion connecting the central portion and the first side portion; a second connecting part connecting the central part and the second side part,
  • the first connecting portion extends between the first terminal and the end of the base on the one main surface of the base,
  • the second connecting portion is
  • the width dimension of the first connection part and the second connection part in the second direction perpendicular to the first direction along the end of the base material is equal to the width of the first connection part in the second direction.
  • the antenna according to Form 1 wherein the antenna is smaller than a width dimension of the terminal and the second terminal.
  • a plurality of the antenna patterns and the ground pattern are arranged along the edge of the base material, The antenna according to form 1 or 2, wherein the first side portion of one of the antenna patterns adjacent to each other corresponds to the second side portion of the other of the antenna patterns adjacent to each other.
  • a resin layer is arranged on the one main surface of the base material, The first terminal and the second terminal include a conductor layer having a conductor pattern including a plurality of openings, and a flat first planar conductor layer disposed on the conductor layer, 5.
  • a resin layer is arranged on the one main surface of the base material,
  • the first terminal, the second terminal, and the ground pattern each include a conductor layer having a conductor pattern including a plurality of openings, and a planar first planar conductor layer disposed on the conductor layer.

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  • Details Of Aerials (AREA)

Abstract

Dans la présente invention, un diagramme d'antenne comprend : un conducteur de rayonnement ; une première ligne d'alimentation électrique et une seconde ligne d'alimentation électrique qui sont tirées du conducteur de rayonnement vers un côté de la partie d'extrémité d'un substrat et qui alimentent le conducteur de rayonnement ; et une première borne et une seconde borne respectivement connectées à la première ligne d'alimentation électrique et à la seconde ligne d'alimentation électrique. Un diagramme de masse comprend : une partie centrale disposée entre la première et la seconde borne ; une première partie latérale disposée de manière à prendre en sandwich la première borne entre la première partie latérale et la partie centrale ; une seconde partie latérale disposée de manière à prendre en sandwich la seconde borne entre la seconde partie latérale et la partie centrale ; une première partie de connexion pour connecter la partie centrale et la première partie latérale l'une à l'autre ; et une seconde partie de connexion pour connecter la partie centrale et la seconde partie latérale l'une à l'autre. La première partie de connexion s'étend entre la première borne et la partie d'extrémité du substrat, sur une surface principale du substrat. La seconde partie de connexion s'étend entre la seconde borne et la partie d'extrémité du substrat, sur la surface principale du substrat.
PCT/JP2023/008871 2022-03-11 2023-03-08 Antenne et dispositif d'affichage WO2023171718A1 (fr)

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JP2022037868 2022-03-11
JP2022-037868 2022-03-11

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197544A (en) * 1977-09-28 1980-04-08 The United States Of America As Represented By The Secretary Of The Navy Windowed dual ground plane microstrip antennas
US20200243959A1 (en) * 2019-01-22 2020-07-30 Dongwoo Fine-Chem Co., Ltd. Antenna structure and display device including the same
WO2021147945A1 (fr) * 2020-01-22 2021-07-29 京东方科技集团股份有限公司 Unité d'antenne et son procédé de fabrication, dispositif d'affichage et appareil électronique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197544A (en) * 1977-09-28 1980-04-08 The United States Of America As Represented By The Secretary Of The Navy Windowed dual ground plane microstrip antennas
US20200243959A1 (en) * 2019-01-22 2020-07-30 Dongwoo Fine-Chem Co., Ltd. Antenna structure and display device including the same
WO2021147945A1 (fr) * 2020-01-22 2021-07-29 京东方科技集团股份有限公司 Unité d'antenne et son procédé de fabrication, dispositif d'affichage et appareil électronique

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