WO2020213403A1 - Display device - Google Patents

Display device Download PDF

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Publication number
WO2020213403A1
WO2020213403A1 PCT/JP2020/015073 JP2020015073W WO2020213403A1 WO 2020213403 A1 WO2020213403 A1 WO 2020213403A1 JP 2020015073 W JP2020015073 W JP 2020015073W WO 2020213403 A1 WO2020213403 A1 WO 2020213403A1
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WO
WIPO (PCT)
Prior art keywords
display
antenna
antenna element
display device
touch sensor
Prior art date
Application number
PCT/JP2020/015073
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French (fr)
Japanese (ja)
Inventor
寿文 黒▲崎▼
寅烈 文
祥平 森本
Original Assignee
Ｎｉｓｓｈａ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.)
Filing date
Publication date
Application filed by Ｎｉｓｓｈａ株式会社 filed Critical Ｎｉｓｓｈａ株式会社
Publication of WO2020213403A1 publication Critical patent/WO2020213403A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • 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
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture

Definitions

  • the present invention relates to a display device, particularly a display device having an antenna and a touch sensor.
  • a touch panel is used as an input unit for devices such as smartphones, mobile phones, and tablet terminals. Further, these devices include antennas for transmitting and receiving wireless communication (for example, WiFi, GPS, Bluetooth (registered trademark), 3G, LTE, etc.) (see, for example, Patent Document 1).
  • wireless communication for example, WiFi, GPS, Bluetooth (registered trademark), 3G, LTE, etc.
  • 5G antennas (drive frequency: 28 GHz) are required to have beamforming (beam steering) performance.
  • As a kind of antenna for 5G there is a patch array antenna in which a plurality of patch antennas (1 ⁇ 4, 2 ⁇ 4, 8 ⁇ 8, etc.) are arranged.
  • the electrode material of the patch antenna is a metal such as Cu or Ag, an alloy thereof, or a metal ink (Ag paste) containing a resin.
  • the patch antenna When the patch antenna and peripheral circuits such as RFIC can be arranged on the same plane, the patch antenna has a two-layer structure.
  • a non-contact fed (Aperture coupled fed) structure is adopted, and the patch antenna and the feeding line are connected by a capacitive coupling.
  • a non-contact fed (Proximity coupled Feed) structure can be adopted.
  • the 5G antenna has a three-layer multi-layer structure.
  • An object of the present invention is to find an appropriate arrangement space for an antenna in a display device.
  • the display device includes a display, a touch sensor, a substrate, an antenna structure, and peripheral circuits.
  • the display has a first surface and a second surface.
  • the touch sensor is arranged on the first surface side of the display.
  • the substrate is arranged on the second side of the display.
  • the antenna structure includes an antenna element arranged on the first surface side of the display in the stacking direction, a ground electrode arranged opposite to the antenna element on the display side, and a feeding line arranged on the second surface side of the display. have.
  • the peripheral circuit is connected to the power supply line.
  • the antenna element can be provided with a placement space.
  • the antenna element is arranged on the first surface side of the display in the stacking direction, the antenna element is not easily affected by the metal structure, and good antenna characteristics can be obtained.
  • the connection between the antenna structure and peripheral circuits such as RFIC will be a robust design that does not cause deterioration or wear of the connection part while suppressing the cost associated with the increase in parts and mounting. be able to.
  • the antenna element may be provided on the side opposite to the display of the touch sensor. In this device, the antenna element is not easily affected by the metal structure, and good antenna characteristics can be obtained.
  • the display device may further include an air layer arranged between the antenna element and the ground electrode.
  • the display device may further include a dielectric layer disposed between the antenna element and the ground electrode.
  • a dielectric layer disposed between the antenna element and the ground electrode.
  • the power supply line and peripheral circuits may be provided on the surface opposite to the board with respect to the display.
  • the power supply line and peripheral circuits may be provided on the surface opposite to the touch sensor with respect to the display.
  • an arrangement space for an antenna is provided.
  • FIG. 3 is a schematic cross-sectional view of the display device according to the fourth embodiment.
  • the schematic sectional view of the display apparatus which concerns on 5th Embodiment.
  • the schematic sectional view of the display apparatus which concerns on 6th Embodiment.
  • the schematic plan view which shows the position of the antenna element in the display apparatus which concerns on 7th Embodiment.
  • the schematic plan view which shows the position of the antenna element in the display apparatus which concerns on 8th Embodiment.
  • FIG. 1 is a schematic plan view of the display device according to the first embodiment.
  • FIG. 2 is a schematic cross-sectional view of the display device according to the first embodiment.
  • the display device 1 includes a substrate 3, a display 5, a touch sensor 7, and a cover member 9. These members are laminated in the above order from the lower side to the upper side in FIG.
  • the substrate 3 (an example of a substrate) is a main board PCB (Printed Circuit Board) formed in a flat plate shape.
  • the substrate 3 has a first surface 3a on the upper side of FIG. 2 and a second surface 3b on the lower side of FIG.
  • the substrate 3 is arranged on the opposite side of the display 5 from the touch sensor 7.
  • the display 5 (an example of a display) is, for example, a liquid crystal display device or an organic EL display device.
  • the display 5 displays various information to the operator.
  • the display 5 has a first surface 5a on the upper side of FIG. 2 and a second surface 5b on the lower side of FIG.
  • the display 5 is arranged apart from the upper part of the drawing of the substrate 3. That is, the substrate 3 is arranged on the second surface 5b side of the display 5.
  • the touch sensor 7 (an example of the touch sensor) is laminated on the display 5.
  • the touch sensor 7 enables various input operations by the operator.
  • the touch sensor 7 has a first surface 7a on the upper side of FIG. 2 and a second surface 7b on the lower side of FIG.
  • the touch sensor 7 is laminated on the first surface 5a of the display 5 via the first adhesive layer 6.
  • the touch sensor 7 is, for example, a capacitance type.
  • the cover member 9 is laminated on the touch sensor 7.
  • the cover member 9 is, for example, a cover glass.
  • the cover member 9 has a first surface 9a on the upper side of FIG. 2 and a second surface 9b on the lower side of FIG.
  • the cover member 9 is laminated on the touch sensor 7 via the second adhesive layer 8.
  • the cover member 9 has a display area 9c and a frame area 9d in a plan view.
  • the display area 9c corresponds to an operation area including a display unit of the display 5 and a plurality of electrodes of the touch sensor 7.
  • the frame area 9d corresponds to the frame portion of the display 5 and the frame portion of the touch sensor 7, and is located on the peripheral edge portion of the display area 9c.
  • the display device 1 has, for example, two antenna structures 31 (an example of the antenna structure).
  • Each antenna structure 31 is, for example, a 5G antenna.
  • the antenna structure 31 is a phased array antenna composed of two or more antenna elements. As a result, beamforming performance is realized, that is, directivity and radial direction can be controlled.
  • the number of antenna elements is not limited to two.
  • the frequency bands used by the 5G antenna are the following two. 1) sub6: 6 GHz or less (especially Japan is considering 3.48 to 4.2 GHz, 4.4 to 4.9 GHz) 2) mmWave: 25 to 80 GHz (especially Japan is considering 43.5 GHz or less)
  • one element of a 5G antenna generally has a size equivalent to ⁇ / 2 on one side.
  • the antenna structure 31 adopts a non-contact fed (appearance group fed) structure (described later).
  • the antenna structure 31 is arranged at a position corresponding to the frame region 9d of the cover member 9 in a plan view.
  • the antenna structure 31 is usually visible light opaque. This is because the antenna structure 31 is arranged in the frame region of the cover member 9, so that it is not necessary to make the visible light transparent.
  • FIG. 3 is a schematic exploded view showing the basic structure of the antenna structure.
  • the antenna structure 31 has a plurality of antenna elements 33 (an example of an antenna element).
  • the planar shape of the antenna element 33 is circular, but it may be formed in any shape such as various polygons and ellipses.
  • the antenna element 33 is made of a conductive paste (for example, a paste composed of metal particles and a binder resin), a copper thin film, or the like. Radio waves are output from the plurality of antenna elements 33. Further, the phases, amplitudes, etc.
  • the antenna structure 31 can actively adjust the radiation direction of the radio wave.
  • a total of six antenna elements 33 are formed in a matrix of 2 rows and 3 columns.
  • the number and arrangement of the antenna elements 33 can be appropriately set.
  • the antenna elements 33 are not limited to a two-dimensional matrix, but may be arranged in a one-dimensional column.
  • the antenna element 33 is arranged on the first surface 5a side (that is, the touch sensor 7 side) of the display 5. Specifically, the antenna element 33 is provided on the side opposite to the display 5 with respect to the touch sensor 7. In this case, the antenna element 33 is not easily affected by the metal structure, and good antenna characteristics can be obtained. More specifically, the antenna element 33 is formed on the first surface 7a (the surface opposite to the display 5) of the touch sensor 7.
  • the antenna structure 31 has a ground electrode 35 (an example of a ground electrode).
  • the ground electrode 35 functions as a ground surface of the antenna element 33.
  • the ground electrode 35 is arranged so as to face the display 5 side away from the antenna element 33.
  • the ground electrode 35 is formed on the first surface 3a (the surface on the display 5 side) of the substrate 3, and an air layer 38 is formed between the antenna element 33 and the ground electrode 35.
  • the position of the air layer 38 in the stacking direction is the same as that of the display 5. That is, the display 5 is partially cut out and forms the air layer 38.
  • the air layer 38 may be formed by making the area of the display 5 smaller than that of the touch sensor 7 or the cover member 9, for example, by making any side shorter.
  • the ground electrode 35 is formed with an opening 35a.
  • the antenna structure 31 has a feeding line 37 (an example of a feeding line).
  • the power supply line 37 is arranged on the second surface 5b side (that is, the side opposite to the touch sensor 7) of the display 5. That is, the power feeding line 37 is formed at a position in the stacking direction different from that of the ground electrode 35. Specifically, the power supply line 37 is formed on the second surface 3b (the surface opposite to the display 5) of the substrate 3.
  • the feeding line 37 is, for example, a microstrip line, and supplies a high frequency signal RF to the antenna element 33. As shown in FIG. 3, the power feeding line 37 is connected to the antenna element 33 by a capacitive coupling through the opening 35a of the ground electrode 35.
  • the display device 1 has a peripheral circuit 39 (an example of a peripheral circuit).
  • the peripheral circuit 39 is connected to the power supply line 37.
  • the power feeding line 37 is provided on the same plane as the peripheral circuit 39, that is, on the second surface 3b of the substrate 3.
  • the antenna structure 31 can be provided with the arrangement space. Secondly, since the antenna element 33 is arranged on the touch sensor 7 side with respect to the display 5, the antenna element 33 is not easily affected by the metal structure, and good antenna characteristics can be obtained. Thirdly, by using non-contact power supply, the connection between the antenna element 33 and the peripheral circuit 39 such as RFIC is a robust design that does not cause deterioration or wear of the connection part while suppressing the cost associated with the increase in parts and mounting. Can be. In addition, it is possible to suppress a decrease in efficiency due to power loss of the coaxial connector and the coaxial cable. As an additional effect, the antenna element 33 can be manufactured at the same time as the electrodes and wiring of the touch sensor 7. Therefore, it becomes cheap.
  • the antenna element 33 is formed on the first surface 7a of the touch sensor 7, but the antenna element 33 is formed on the side opposite to the display 5 with respect to the touch sensor 7. Therefore, the antenna element 33 may be provided at a position different from that of the first embodiment as long as it is within the range. This is because if the above conditions are satisfied, the effect that the antenna element 33 is less affected by the metal structure can be obtained.
  • FIG. 4 is a schematic cross-sectional view of the display device according to the second embodiment.
  • the basic structure of this embodiment is the same as that of the first embodiment.
  • the difference is that the antenna element 33A is formed on the cover member 9.
  • the antenna element 33A is provided on the second surface 9b of the cover member 9. The same effect as that of the first embodiment can be obtained in this embodiment as well.
  • the antenna element 33 is arranged on the side opposite to the display 5 with respect to the touch sensor 7, but the patch array antenna is formed on the touch sensor 7 side with respect to the display 5.
  • the antenna element 33 may be provided at a position different from that of the first embodiment and the second embodiment. This is because, within that range, the antenna element 33 can be provided with an arrangement space, and the antenna element 33 is less likely to be affected by the metal structure.
  • FIG. 5 is a schematic cross-sectional view of the display device according to the third embodiment.
  • the basic structure is the same as in the first embodiment.
  • the difference is that the antenna element 33B is formed on the second surface 7b (the surface on the display 5 side) of the touch sensor 7. Also in this embodiment, the same effects as those in the first embodiment and the second embodiment can be obtained.
  • an air layer 38 is provided between the antenna element 33 and the ground electrode 35 in a portion corresponding to the display 5, but if an appropriate relative permittivity can be obtained, Since it is good, a configuration other than the air layer may be used here.
  • FIG. 6 is a schematic cross-sectional view of the display device according to the fourth embodiment.
  • the display device 1 further includes a dielectric layer 40 arranged between the antenna element 33 and the ground electrode 35.
  • the position of the dielectric layer 40 in the stacking direction is the same as that of the display 5. That is, the display 5 is in a state of being cut out in a part, and the dielectric layer 40 is filled in the part.
  • the space filled with the dielectric layer 40 may be formed by making the area of the display 5 smaller than that of the touch sensor 7 or the cover member 9, for example, by making any side shorter.
  • the dielectric layer 40 is a plastic film, OCA, or the like. When filling with a film or the like, the distance between the antenna element 33 and the ground electrode 35 is fixed, so that desired antenna characteristics (resonance frequency, Return Loss, radiation efficiency, etc.) can be realized.
  • the relative permittivity of the dielectric layer 40 is usually more than 1.0 and 2.5 or less, preferably 1.5 or more and 2.5 or less. When the relative permittivity of the low dielectric constant layer is in this range, the degree of electrical coupling between the antenna element 33 and the feeding line 37 can be further reduced.
  • the dielectric layer may be provided in the first to third embodiments.
  • FIG. 7 is a schematic cross-sectional view of the display device according to the fifth embodiment.
  • the basic structure of the fifth embodiment is the same as that of the first to fourth embodiments.
  • the display device 1 has a first substrate 41 and a second substrate 43 instead of the substrate 3.
  • the first substrate 41 is made of, for example, PCB or FPC (Flexible printed circuits).
  • a power supply line 37 and a peripheral circuit 39 are provided on the first substrate 41.
  • the second board 43 is a main board, for example, a PCB.
  • the first substrate 41 and the second substrate 43 are electrically connected.
  • the dielectric layer 40A is arranged between the antenna element 33 and the ground electrode 35.
  • the dielectric layer 40A is the same as the dielectric layer 40 of the fourth embodiment. Also in this embodiment, the same effect as that of the first to fourth embodiments can be obtained.
  • FIG. 8 is a schematic cross-sectional view of the display device according to the sixth embodiment.
  • the basic structure of the sixth embodiment is the same as that of the first to fifth embodiments.
  • the ground electrode 35 is formed on the first surface 5a of the display 5. Therefore, in this embodiment, the air layer and the dielectric layer corresponding to the position in the stacking direction of the display 5 are not formed.
  • the power supply line 37 and the peripheral circuit 39 are provided on the second surface 5b (the surface opposite to the touch sensor 7) of the display 5.
  • the ground electrode 35 and the feeding line 37 are formed on the display 5 by using the electrodes of the display 5. Specifically, the ground electrode 35 is formed on the first surface 5a of the display 5, and the feeding line 37 and the peripheral circuit 39 are formed on the second surface 5b of the display 5.
  • the power supply line 37 is connected to the peripheral circuit 39. Further, the peripheral circuit 39 and the substrate 3A are electrically connected.
  • the peripheral circuit may be formed on the FPC connected to the display. Also in this embodiment, the same effect as in the first to fifth embodiments can be obtained.
  • FIG. 9 is a schematic plan view showing the position of the antenna in the display device according to the seventh embodiment.
  • the antenna element 33A is arranged so as to overlap the frame region 9d of the cover member 9 in a plan view.
  • L and W of the antenna element 33A the component parallel to the feeding line is defined as L and the component perpendicular to the feeding line is defined as W
  • L is an important dimension for determining the resonance frequency, so the adjustment range is small.
  • W it is possible to set W ⁇ L.
  • the power feeding line 37 is arranged horizontally with respect to the extending direction of the frame region 9d of the cover member 9 and is connected to the antenna element 33A. Therefore, the W of the antenna element 33A can be reduced, and an efficient antenna can be designed even when the width of the frame region 9d of the cover member 9 is narrow, for example.
  • the frame region 9d of the cover member 9 can be narrowed.
  • the ante element 33A is a single patch antenna, but a patch array antenna may also be used.
  • FIG. 10 is a schematic plan view showing the positions of the antenna elements in the display device according to the eighth embodiment.
  • the plurality of power feeding lines 37 are arranged horizontally with respect to the extending direction of the frame region 9d of the cover member 9 and are connected to each of the plurality of antenna elements 33B. Therefore, the W of the antenna element 33B can be reduced, and an efficient antenna can be designed even when the width of the frame region 9d of the cover member 9 is narrow.
  • FIG. 11 is a schematic plan view showing the position of the antenna in the display device according to the ninth embodiment.
  • the power feeding line 37 extends perpendicularly to the frame region 9d of the cover member 9 and is connected to the antenna element 33C.
  • the antenna elements 33C are formed in an array, high integration is possible, and the degree of freedom in designing the array is increased by increasing the adjustment allowance for the distance between the antenna elements 33C.
  • the tenth embodiment antenna element 33 may be arranged in the display area 9c of the cover member 9.
  • the antenna element 33 is preferably made of a conductive film that is transparent to visible light.
  • the antenna element 33 may be formed of ITO (indium tin oxide) or transparent conductive ink (for example, silver nanowire ink).
  • the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the invention.
  • the plurality of embodiments and modifications described herein can be arbitrarily combined as needed.
  • the present invention can be applied to other than the capacitance type touch panel, and can be implemented, for example, in a resistive touch panel.
  • the present invention can be applied to antennas other than 5G antennas, and can also be used as antennas for other communication methods such as 3G, 4G, and Wifi.
  • the present invention can be widely applied to a display device having an antenna and a touch sensor.
  • Display device 3 Substrate 5: Display 7: Touch sensor 8: Second adhesive layer 9: Cover member 31: Antenna structure 33: Antenna element 35: Ground electrode 37: Power supply line 38: Air layer 39: Peripheral circuit 40: Dielectric layer

Abstract

[Problem] To provide an arrangement space to an antenna in a display device. [Solution] A display device 1 is provided with a display 5, a touch sensor 7, a substrate 3, an antenna structure 31, and a peripheral circuit 39. The display 5 has a first surface 5a and a second surface 5b. The touch sensor 7 is disposed on the first surface 5a side of the display 5. The substrate 3 is disposed on the second surface 5b side of the display 5. The antenna structure 31 has, in the lamination direction, an antenna element 33 that is disposed on the first surface 5a side of the display 5, a ground electrode 35 spaced apart from and opposing the antenna element 33 on the display 5 side, and a power feed line 37 disposed on the second surface 5b side of the display 5. The peripheral circuit 39 is connected to the power feed line 37.

Description

ディスプレイ装置Display device
　本発明は、ディスプレイ装置、特に、アンテナ及びタッチセンサを有するディスプレイ装置に関する。 The present invention relates to a display device, particularly a display device having an antenna and a touch sensor.
　スマートホン、携帯電話、タブレット端末などの機器の入力部としてタッチパネルが使用されている。また、これら機器は、無線通信（例えば、ＷｉＦｉ、ＧＰＳ、Ｂｌｕｅｔｏｏｔｈ（登録商標）、３Ｇ、ＬＴＥ等）の送受信用アンテナを備えている（例えば、特許文献１を参照）。 A touch panel is used as an input unit for devices such as smartphones, mobile phones, and tablet terminals. Further, these devices include antennas for transmitting and receiving wireless communication (for example, WiFi, GPS, Bluetooth (registered trademark), 3G, LTE, etc.) (see, for example, Patent Document 1).
　現在実用化が進んでいる５Ｇシステムにおいて、５Ｇ用のアンテナ（駆動周波数：２８ＧＨｚ）は、ビームフォーミング（ビームステアリング）性能が求められる。５Ｇ用のアンテナの一種として、パッチアンテナを複数個（１×４や２×４や８×８等）配列した、パッチアレーアンテナがある。パッチアンテナの電極材料はＣｕやＡｇ等の金属やその合金、樹脂を含んだ金属インキ（Ａｇペースト）などである。パッチアンテナの１辺の寸法は、例えば、λ／２＝５ｍｍ（２８ＧＨｚ）程度である。 In 5G systems that are currently in practical use, 5G antennas (drive frequency: 28 GHz) are required to have beamforming (beam steering) performance. As a kind of antenna for 5G, there is a patch array antenna in which a plurality of patch antennas (1 × 4, 2 × 4, 8 × 8, etc.) are arranged. The electrode material of the patch antenna is a metal such as Cu or Ag, an alloy thereof, or a metal ink (Ag paste) containing a resin. The size of one side of the patch antenna is, for example, about λ / 2 = 5 mm (28 GHz).
　パッチアンテナとＲＦＩＣ等の周辺回路が同一平面上に配置できる場合には、パッチアンテナは、２層構造をとる。
　パッチアンテナと周辺回路が同一平面上に取れない場合や、帯域幅を増やす目的の場合、非接触給電（Ａｐｅｒｔｕｒｅ　ｃｏｕｐｌｅｄ　ｆｅｅｄ）構造をとり、パッチアンテナと給電線路とを容量性結合で接続させる。また、非接触給電（Ｐｒｏｘｉｍｉｔｙ　ｃｏｕｐｌｅｄ　Ｆｅｅｄ）構造をとることもできる。これらの場合は、５Ｇ用アンテナは、３層のマルチレイヤー構造になる。 When the patch antenna and peripheral circuits such as RFIC can be arranged on the same plane, the patch antenna has a two-layer structure.
When the patch antenna and the peripheral circuit cannot be taken on the same plane, or when the purpose is to increase the bandwidth, a non-contact fed (Aperture coupled fed) structure is adopted, and the patch antenna and the feeding line are connected by a capacitive coupling. In addition, a non-contact fed (Proximity coupled Feed) structure can be adopted. In these cases, the 5G antenna has a three-layer multi-layer structure.
特開２０１５－７９３９９号公報JP-A-2015-79399
　５Ｇアンテナの問題として、複数個のパッチアンテナを基板（メインボード）上に配置するスペースが不足している。これは、現在、携帯端末機の小型化・薄型化・高性能化・アンテナの多搭載化が進んでいるためである。
　また、アンテナは周りの構造物（特に金属構造物）の影響を受け特性が劣化するので、そのような影響を無くすために周辺には金属構造物が無いことが望ましい。そのため、アンテナをメインボード上に設ける場合は、基板上のアンテナ周辺にメタル開口部を設ける必要がある。 As a problem of 5G antennas, there is insufficient space for arranging a plurality of patch antennas on a board (main board). This is because mobile terminals are currently becoming smaller, thinner, higher in performance, and more antennas are installed.
In addition, since the antenna is affected by surrounding structures (particularly metal structures) and its characteristics deteriorate, it is desirable that there are no metal structures in the vicinity in order to eliminate such effects. Therefore, when the antenna is provided on the main board, it is necessary to provide a metal opening around the antenna on the board.
　本発明の課題は、ディスプレイ装置において、アンテナ用に適切な配置スペースを見つけ出すことにある。 An object of the present invention is to find an appropriate arrangement space for an antenna in a display device.
　以下に、課題を解決するための手段として複数の態様を説明する。これら態様は、必要に応じて任意に組み合せることができる。 Below, a plurality of aspects will be described as means for solving the problem. These aspects can be arbitrarily combined as needed.
　本発明の一見地に係るディスプレイ装置は、ディスプレイと、タッチセンサと、基板と、アンテナ構造と、周辺回路とを備えていている。
　ディスプレイは、第１面と第２面を有する。
　タッチセンサは、ディスプレイの第１面側に配置されている。
　基板は、ディスプレイの第２面側に配置されている。
　アンテナ構造は、積層方向においてディスプレイの第１面側に配置されたアンテナ素子と、アンテナ素子からディスプレイ側に離れて対向配置されたグラウンド電極と、ディスプレイの第２面側に配置された給電線路とを有している。
　周辺回路は、給電線路に接続されている。 The display device according to the first aspect of the present invention includes a display, a touch sensor, a substrate, an antenna structure, and peripheral circuits.
The display has a first surface and a second surface.
The touch sensor is arranged on the first surface side of the display.
The substrate is arranged on the second side of the display.
The antenna structure includes an antenna element arranged on the first surface side of the display in the stacking direction, a ground electrode arranged opposite to the antenna element on the display side, and a feeding line arranged on the second surface side of the display. have.
The peripheral circuit is connected to the power supply line.
　この装置では、以下の効果が得られる。
　第１に、配置場所が限定されているディスプレイ装置において、アンテナ素子に配置スペースを与えることができる。
　第２に、アンテナ素子が積層方向においてディスプレイの第１面側に配置されているので、アンテナ素子が金属構造物の影響を受けにくく、良好なアンテナ特性が得られる。
　第３に、非接触給電を用いることで、アンテナ構造とＲＦＩＣ等の周辺回路との接続について、部品増加や実装に伴うコストを抑えつつ、接続部分の劣化・消耗が起きないロバストな設計にすることができる。また同軸コネクタや同軸ケーブルの電力ロスに起因する効率の低下を抑えることができる。 The following effects can be obtained with this device.
First, in a display device in which the placement location is limited, the antenna element can be provided with a placement space.
Secondly, since the antenna element is arranged on the first surface side of the display in the stacking direction, the antenna element is not easily affected by the metal structure, and good antenna characteristics can be obtained.
Thirdly, by using non-contact power supply, the connection between the antenna structure and peripheral circuits such as RFIC will be a robust design that does not cause deterioration or wear of the connection part while suppressing the cost associated with the increase in parts and mounting. be able to. In addition, it is possible to suppress a decrease in efficiency due to power loss of the coaxial connector or the coaxial cable.
　アンテナ素子は、タッチセンサのディスプレイと反対側に設けられていてもよい。
　この装置では、アンテナ素子が金属構造物の影響を受けにくく、良好なアンテナ特性が得られる。 The antenna element may be provided on the side opposite to the display of the touch sensor.
In this device, the antenna element is not easily affected by the metal structure, and good antenna characteristics can be obtained.
　ディスプレイ装置は、アンテナ素子とグラウンド電極との間に配置された空気層をさらに備えていてもよい。
　この装置では、簡単な構造で、電磁結合による給電を実現できる。 The display device may further include an air layer arranged between the antenna element and the ground electrode.
With this device, it is possible to realize power supply by electromagnetic coupling with a simple structure.
　ディスプレイ装置は、アンテナ素子とグラウンド電極との間に配置された誘電体層をさらに備えていてもよい。
　この装置では、誘電体層によってアンテナ素子とグラウンド電極との間の距離が固定されるので、所望のアンテナ特性（共振周波数やＲｅｔｕｒｎ　Ｌｏｓｓ、放射効率等）を実現できる。 The display device may further include a dielectric layer disposed between the antenna element and the ground electrode.
In this device, since the distance between the antenna element and the ground electrode is fixed by the dielectric layer, desired antenna characteristics (resonance frequency, Return Loss, radiation efficiency, etc.) can be realized.
　給電線路と周辺回路は、ディスプレイに対して基板と反対側の面に設けられていてもよい。 The power supply line and peripheral circuits may be provided on the surface opposite to the board with respect to the display.
　給電線路と周辺回路は、ディスプレイに対してタッチセンサと反対側の面に設けられていてもよい。 The power supply line and peripheral circuits may be provided on the surface opposite to the touch sensor with respect to the display.
　本発明に係るディスプレイ装置では、アンテナ用の配置スペースが与えられる。 In the display device according to the present invention, an arrangement space for an antenna is provided.
第１実施形態に係るディスプレイ装置の模式的平面図。The schematic plan view of the display apparatus which concerns on 1st Embodiment. 第１実施形態に係るディスプレイ装置の模式的断面図。The schematic sectional view of the display apparatus which concerns on 1st Embodiment. アンテナ構造の基本構造を示す模式的分解図。Schematic exploded view showing the basic structure of the antenna structure. 第２実施形態に係るディスプレイ装置の模式的断面図。The schematic sectional view of the display apparatus which concerns on 2nd Embodiment. 第３実施形態に係るディスプレイ装置の模式的断面図。The schematic sectional view of the display apparatus which concerns on 3rd Embodiment. 第４実施形態に係るディスプレイ装置の模式的断面図。FIG. 3 is a schematic cross-sectional view of the display device according to the fourth embodiment. 第５実施形態に係るディスプレイ装置の模式的断面図。The schematic sectional view of the display apparatus which concerns on 5th Embodiment. 第６実施形態に係るディスプレイ装置の模式的断面図。The schematic sectional view of the display apparatus which concerns on 6th Embodiment. 第７実施形態に係るディスプレイ装置におけるアンテナ素子の位置を示す模式的平面図。The schematic plan view which shows the position of the antenna element in the display apparatus which concerns on 7th Embodiment. 第８実施形態に係るディスプレイ装置におけるアンテナ素子の位置を示す模式的平面図。The schematic plan view which shows the position of the antenna element in the display apparatus which concerns on 8th Embodiment. 第９実施形態に係るディスプレイ装置におけるアンテナ素子の位置を示す模式的平面図。The schematic plan view which shows the position of the antenna element in the display apparatus which concerns on 9th Embodiment.
１．第１実施形態
（１）基本構成
　図１及び図２を用いて、ディスプレイ装置１（ディスプレイ装置の一例）を説明する。
図１は、第１実施形態に係るディスプレイ装置の模式的平面図である。図２は、第１実施形態に係るディスプレイ装置の模式的断面図である。
　ディスプレイ装置１は、図２に示すように、基板３と、ディスプレイ５と、タッチセンサ７と、カバー部材９とを有している。これら部材は、図２下側から上側に向けて上記の順番で積層されている。 1. 1. First Embodiment (1) Basic Configuration A display device 1 (an example of a display device) will be described with reference to FIGS. 1 and 2.
FIG. 1 is a schematic plan view of the display device according to the first embodiment. FIG. 2 is a schematic cross-sectional view of the display device according to the first embodiment.
As shown in FIG. 2, the display device 1 includes a substrate 3, a display 5, a touch sensor 7, and a cover member 9. These members are laminated in the above order from the lower side to the upper side in FIG.
（２）基板
　基板３（基板の一例）は、平板状に形成されたメインボードＰＣＢ（Ｐｒｉｎｔｅｄ　Ｃｉｒｃｕｉｔ　Ｂｏａｒｄ）である。基板３は、図２上側の第１面３ａと図２下側の第２面３ｂとを有している。基板３は、ディスプレイ５のタッチセンサ７と反対側に配置されている。 (2) Substrate The substrate 3 (an example of a substrate) is a main board PCB (Printed Circuit Board) formed in a flat plate shape. The substrate 3 has a first surface 3a on the upper side of FIG. 2 and a second surface 3b on the lower side of FIG. The substrate 3 is arranged on the opposite side of the display 5 from the touch sensor 7.
（３）ディスプレイ
　ディスプレイ５（ディスプレイの一例）は、例えば、液晶表示装置、有機ＥＬ表示装置である。ディスプレイ５は、操作者に各種の情報を表示する。
　ディスプレイ５は、図２上側の第１面５ａと図２下側の第２面５ｂとを有している。ディスプレイ５は、基板３の図上方に離れて配置されている。つまり、基板３はディスプレイ５の第２面５ｂ側に配置されている。 (3) Display The display 5 (an example of a display) is, for example, a liquid crystal display device or an organic EL display device. The display 5 displays various information to the operator.
The display 5 has a first surface 5a on the upper side of FIG. 2 and a second surface 5b on the lower side of FIG. The display 5 is arranged apart from the upper part of the drawing of the substrate 3. That is, the substrate 3 is arranged on the second surface 5b side of the display 5.
（４）タッチセンサ
　タッチセンサ７（タッチセンサの一例）は、ディスプレイ５に積層されている。タッチセンサ７によって、操作者による各種の入力操作が可能である。タッチセンサ７は、図２上側の第１面７ａと図２下側の第２面７ｂとを有している。
　タッチセンサ７は、第１接着層６を介してディスプレイ５の第１面５ａ上に積層されている。
　タッチセンサ７は、例えば、静電容量方式である。 (4) Touch sensor The touch sensor 7 (an example of the touch sensor) is laminated on the display 5. The touch sensor 7 enables various input operations by the operator. The touch sensor 7 has a first surface 7a on the upper side of FIG. 2 and a second surface 7b on the lower side of FIG.
The touch sensor 7 is laminated on the first surface 5a of the display 5 via the first adhesive layer 6.
The touch sensor 7 is, for example, a capacitance type.
（５）カバー部材
　カバー部材９は、タッチセンサ７の上に積層されている。カバー部材９は、例えば、カバーガラスである。カバー部材９は、図２上側の第１面９ａと図２下側の第２面９ｂとを有している。
　カバー部材９は、第２接着層８を介してタッチセンサ７の上に積層されている。
　カバー部材９は、図１に示すように、平面視で、表示領域９ｃと額縁領域９ｄとを有している。表示領域９ｃは、ディスプレイ５の表示部及びタッチセンサ７の複数の電極を含む操作領域に対応している。額縁領域９ｄは、ディスプレイ５の額縁部及びタッチセンサ７の額縁部に対応しており、表示領域９ｃの周縁部にある。 (5) Cover member The cover member 9 is laminated on the touch sensor 7. The cover member 9 is, for example, a cover glass. The cover member 9 has a first surface 9a on the upper side of FIG. 2 and a second surface 9b on the lower side of FIG.
The cover member 9 is laminated on the touch sensor 7 via the second adhesive layer 8.
As shown in FIG. 1, the cover member 9 has a display area 9c and a frame area 9d in a plan view. The display area 9c corresponds to an operation area including a display unit of the display 5 and a plurality of electrodes of the touch sensor 7. The frame area 9d corresponds to the frame portion of the display 5 and the frame portion of the touch sensor 7, and is located on the peripheral edge portion of the display area 9c.
（６）パッチアレイアンテナ
　ディスプレイ装置１は、例えば、２個のアンテナ構造３１（アンテナ構造の一例）を有している。各アンテナ構造３１は、例えば５Ｇ用アンテナである。アンテナ構造３１は、２個以上のアンテナ素子からなるフェーズドアレイアンテナである。これにより、ビームフォーミング性能が実現され、つまり指向性及び放射方向のコントロールができる。なお、アンテナ素子の数は２個に限定されない。 (6) Patch Array Antenna The display device 1 has, for example, two antenna structures 31 (an example of the antenna structure). Each antenna structure 31 is, for example, a 5G antenna. The antenna structure 31 is a phased array antenna composed of two or more antenna elements. As a result, beamforming performance is realized, that is, directivity and radial direction can be controlled. The number of antenna elements is not limited to two.
　さらに、５Ｇ用アンテナが使用する周波数帯域は下記の２つである。
　１）ｓｕｂ６：　６ＧＨｚ以下（特に日本は３．４８～４．２ＧＨｚ、４．４～４．９ＧＨｚを検討中）
　２）ｍｍＷａｖｅ　：２５～８０ＧＨｚ（特に日本は４３．５ＧＨｚ以下を検討中）　また、５Ｇ用アンテナの１つの素子は、一般的に、一辺がλ／２に準ずるサイズである。
　アンテナ構造３１は、非接触給電（ａｐｅｒｔｕｒｅ　ｃｏｕｐｌｅｄ　ｆｅｅｄ）構造（後述）を採用している。 Further, the frequency bands used by the 5G antenna are the following two.
1) sub6: 6 GHz or less (especially Japan is considering 3.48 to 4.2 GHz, 4.4 to 4.9 GHz)
2) mmWave: 25 to 80 GHz (especially Japan is considering 43.5 GHz or less) In addition, one element of a 5G antenna generally has a size equivalent to λ / 2 on one side.
The antenna structure 31 adopts a non-contact fed (appearance group fed) structure (described later).
　アンテナ構造３１は、図１に示すように、平面視で、カバー部材９の額縁領域９ｄに対応する位置に配置されている。この実施形態では、アンテナ構造３１は通常、可視光不透明である。アンテナ構造３１がカバー部材９の額縁領域に配置されるので、可視光透明とする必要性が無いからである。 As shown in FIG. 1, the antenna structure 31 is arranged at a position corresponding to the frame region 9d of the cover member 9 in a plan view. In this embodiment, the antenna structure 31 is usually visible light opaque. This is because the antenna structure 31 is arranged in the frame region of the cover member 9, so that it is not necessary to make the visible light transparent.
　（６－１）アンテナ構造
　図３を用いて、アンテナ構造３１を詳細に説明する。図３は、アンテナ構造の基本構造を示す模式的分解図である。
　アンテナ構造３１は、図１及び図３に示すように、複数のアンテナ素子３３（アンテナ素子の一例）を有している。図３に示すように、アンテナ素子３３の平面形状は円形であるが、各種の多角形、楕円形等のような任意の形状に形成してもよい。アンテナ素子３３は、導電性ペースト（例えば金属粒子とバインダー樹脂からなるペースト）、銅薄膜等で作製される。
　複数のアンテナ素子３３から電波が出力される。また、複数のアンテナ素子３３から放射される電波は、互いの位相、振幅等が適宜調整される。これにより、アンテナ構造３１は、電波の放射方向を能動的に調整することができる。
　アンテナ素子３３は、例えば、２行３列のマトリクス状で合計６個形成されている。なお、アンテナ素子３３の個数や配置は、適宜設定できる。なお、アンテナ素子３３は、２次元のマトリクス状に限らず、１次元の列状に並べてもよい。 (6-1) Antenna Structure The antenna structure 31 will be described in detail with reference to FIG. FIG. 3 is a schematic exploded view showing the basic structure of the antenna structure.
As shown in FIGS. 1 and 3, the antenna structure 31 has a plurality of antenna elements 33 (an example of an antenna element). As shown in FIG. 3, the planar shape of the antenna element 33 is circular, but it may be formed in any shape such as various polygons and ellipses. The antenna element 33 is made of a conductive paste (for example, a paste composed of metal particles and a binder resin), a copper thin film, or the like.
Radio waves are output from the plurality of antenna elements 33. Further, the phases, amplitudes, etc. of the radio waves radiated from the plurality of antenna elements 33 are appropriately adjusted. As a result, the antenna structure 31 can actively adjust the radiation direction of the radio wave.
For example, a total of six antenna elements 33 are formed in a matrix of 2 rows and 3 columns. The number and arrangement of the antenna elements 33 can be appropriately set. The antenna elements 33 are not limited to a two-dimensional matrix, but may be arranged in a one-dimensional column.
　次に、図２を用いて、アンテナ素子３３の積層方向位置を説明する。アンテナ素子３３は、ディスプレイ５の第１面５ａ側（つまり、タッチセンサ７側）に配置されている。具体的には、アンテナ素子３３は、タッチセンサ７に対してディスプレイ５と反対側に設けられている。この場合、アンテナ素子３３が金属構造物の影響を受けにくく、良好なアンテナ特性が得られる。さらに具体的には、アンテナ素子３３は、タッチセンサ７の第１面７ａ（ディスプレイ５と反対側の面）に形成されている。 Next, the position of the antenna element 33 in the stacking direction will be described with reference to FIG. The antenna element 33 is arranged on the first surface 5a side (that is, the touch sensor 7 side) of the display 5. Specifically, the antenna element 33 is provided on the side opposite to the display 5 with respect to the touch sensor 7. In this case, the antenna element 33 is not easily affected by the metal structure, and good antenna characteristics can be obtained. More specifically, the antenna element 33 is formed on the first surface 7a (the surface opposite to the display 5) of the touch sensor 7.
　アンテナ構造３１は、グラウンド電極３５（グラウンド電極の一例）を有している。グラウンド電極３５は、アンテナ素子３３のアース面として機能する。
　次に、図２を用いて、グラウンド電極３５の積層方向位置を説明する。グラウンド電極３５は、アンテナ素子３３からディスプレイ５側に離れて対向配置されている。具体的には、グラウンド電極３５は、基板３の第１面３ａ（ディスプレイ５側の面）に形成されており、アンテナ素子３３とグラウンド電極３５との間に空気層３８が形成されている。空気層３８は、積層方向位置がディスプレイ５と同じである。つまり、ディスプレイ５は、一部において切り欠かれた状態になっており、空気層３８を形成している。なお、空気層３８は、ディスプレイ５がタッチセンサ７やカバー部材９より例えばいずれかの辺を短くする等で面積を小さくすることによって形成されてもよい。
なお、グラウンド電極３５には、図３に示すように、開口部３５ａが形成されている。 The antenna structure 31 has a ground electrode 35 (an example of a ground electrode). The ground electrode 35 functions as a ground surface of the antenna element 33.
Next, the position of the ground electrode 35 in the stacking direction will be described with reference to FIG. The ground electrode 35 is arranged so as to face the display 5 side away from the antenna element 33. Specifically, the ground electrode 35 is formed on the first surface 3a (the surface on the display 5 side) of the substrate 3, and an air layer 38 is formed between the antenna element 33 and the ground electrode 35. The position of the air layer 38 in the stacking direction is the same as that of the display 5. That is, the display 5 is partially cut out and forms the air layer 38. The air layer 38 may be formed by making the area of the display 5 smaller than that of the touch sensor 7 or the cover member 9, for example, by making any side shorter.
As shown in FIG. 3, the ground electrode 35 is formed with an opening 35a.
　アンテナ構造３１は、給電線路３７（給電線路の一例）を有している。給電線路３７は、ディスプレイ５の第２面５ｂ側（つまり、タッチセンサ７と反対側）に配置されている。つまり、給電線路３７は、グラウンド電極３５と別の積層方向位置に形成されている。具体的には、給電線路３７は、基板３の第２面３ｂ（ディスプレイ５と反対側の面）に形成されている。
　給電線路３７は、例えばマイクロストリップ線路であり、アンテナ素子３３に高周波信号ＲＦを供給する。図３に示すように、給電線路３７は、グラウンド電極３５の開口部３５ａを通ってアンテナ素子３３と容量性結合で接続している。 The antenna structure 31 has a feeding line 37 (an example of a feeding line). The power supply line 37 is arranged on the second surface 5b side (that is, the side opposite to the touch sensor 7) of the display 5. That is, the power feeding line 37 is formed at a position in the stacking direction different from that of the ground electrode 35. Specifically, the power supply line 37 is formed on the second surface 3b (the surface opposite to the display 5) of the substrate 3.
The feeding line 37 is, for example, a microstrip line, and supplies a high frequency signal RF to the antenna element 33. As shown in FIG. 3, the power feeding line 37 is connected to the antenna element 33 by a capacitive coupling through the opening 35a of the ground electrode 35.
　ディスプレイ装置１は、周辺回路３９（周辺回路の一例）を有している。周辺回路３９は、給電線路３７に接続されている。具体的には、給電線路３７は、周辺回路３９と同一平面、つまり基板３の第２面３ｂに設けられている。  The display device 1 has a peripheral circuit 39 (an example of a peripheral circuit). The peripheral circuit 39 is connected to the power supply line 37. Specifically, the power feeding line 37 is provided on the same plane as the peripheral circuit 39, that is, on the second surface 3b of the substrate 3.
　（６－２）実施形態の効果
　第１に、配置場所が限定されているディスプレイ装置１において、アンテナ構造３１に配置スペースを与えることができる。
　第２に、アンテナ素子３３がディスプレイ５に対してタッチセンサ７側に配置されているので、アンテナ素子３３が金属構造物の影響を受けにくく、良好なアンテナ特性が得られる。
　第３に、非接触給電を用いることで、アンテナ素子３３とＲＦＩＣ等の周辺回路３９との接続について、部品増加や実装に伴うコストを抑えつつ、接続部分の劣化・消耗が起きないロバストな設計にすることができる。また同軸コネクタや同軸ケーブルの電力ロスによる効率の低下を抑えることができる。
　追加の効果として、アンテナ素子３３をタッチセンサ７の電極や配線と同時に製造できる。このため、安価になる。 (6-2) Effect of Embodiment First, in the display device 1 in which the arrangement place is limited, the antenna structure 31 can be provided with the arrangement space.
Secondly, since the antenna element 33 is arranged on the touch sensor 7 side with respect to the display 5, the antenna element 33 is not easily affected by the metal structure, and good antenna characteristics can be obtained.
Thirdly, by using non-contact power supply, the connection between the antenna element 33 and the peripheral circuit 39 such as RFIC is a robust design that does not cause deterioration or wear of the connection part while suppressing the cost associated with the increase in parts and mounting. Can be. In addition, it is possible to suppress a decrease in efficiency due to power loss of the coaxial connector and the coaxial cable.
As an additional effect, the antenna element 33 can be manufactured at the same time as the electrodes and wiring of the touch sensor 7. Therefore, it becomes cheap.
２．第２実施形態
　第１実施形態ではアンテナ素子３３はタッチセンサ７の第１面７ａに形成されていたが、アンテナ素子３３はタッチセンサ７に対してディスプレイ５と反対側に形成されてさえいればよいので、その範囲であればアンテナ素子３３は第１実施形態と異なる位置に設けられていてもよい。上記条件が満たされれば、アンテナ素子３３が金属構造物の影響を受けにくくなるという効果が得られるからである。 2. 2nd Embodiment In the 1st embodiment, the antenna element 33 is formed on the first surface 7a of the touch sensor 7, but the antenna element 33 is formed on the side opposite to the display 5 with respect to the touch sensor 7. Therefore, the antenna element 33 may be provided at a position different from that of the first embodiment as long as it is within the range. This is because if the above conditions are satisfied, the effect that the antenna element 33 is less affected by the metal structure can be obtained.
　図４を用いて、そのような実施例を第２実施形態として説明する。図４は、第２実施形態に係るディスプレイ装置の模式的断面図である。
　この実施形態の基本構造は、第１実施形態と同じである。
　異なる点として、アンテナ素子３３Ａは、カバー部材９に形成されている。具体的には、アンテナ素子３３Ａは、カバー部材９の第２面９ｂに設けられている。
　この実施形態でも、第１実施形態と同様の効果が得られる。 Such an embodiment will be described as a second embodiment with reference to FIG. FIG. 4 is a schematic cross-sectional view of the display device according to the second embodiment.
The basic structure of this embodiment is the same as that of the first embodiment.
The difference is that the antenna element 33A is formed on the cover member 9. Specifically, the antenna element 33A is provided on the second surface 9b of the cover member 9.
The same effect as that of the first embodiment can be obtained in this embodiment as well.
３．第３実施形態
　第１実施形態及び第２実施形態ではアンテナ素子３３はタッチセンサ７に対してディスプレイ５と反対側に配置されていたが、パッチアレイアンテナはディスプレイ５よりタッチセンサ７側に形成されてさえいれば、アンテナ素子３３は第１実施形態及び第２実施形態と異なる位置に設けられていてもよい。その範囲であれば、アンテナ素子３３に配置スペースを与えることができたり、アンテナ素子３３が金属構造物の影響を受けにくくなったりするという効果が得られるからである。
　図５を用いて、そのような実施例を第３実施形態として説明する。図５は、第３実施形態に係るディスプレイ装置の模式的断面図である。 3. 3. Third Embodiment In the first embodiment and the second embodiment, the antenna element 33 is arranged on the side opposite to the display 5 with respect to the touch sensor 7, but the patch array antenna is formed on the touch sensor 7 side with respect to the display 5. As long as it is, the antenna element 33 may be provided at a position different from that of the first embodiment and the second embodiment. This is because, within that range, the antenna element 33 can be provided with an arrangement space, and the antenna element 33 is less likely to be affected by the metal structure.
Such an embodiment will be described as a third embodiment with reference to FIG. FIG. 5 is a schematic cross-sectional view of the display device according to the third embodiment.
　この実施形態では、基本構造は第１実施形態と同じである。
　異なる点として、アンテナ素子３３Ｂは、タッチセンサ７の第２面７ｂ（ディスプレイ５側の面）に形成されている。
　この実施形態でも、第１実施形態及び第２実施形態と同様の効果が得られる。 In this embodiment, the basic structure is the same as in the first embodiment.
The difference is that the antenna element 33B is formed on the second surface 7b (the surface on the display 5 side) of the touch sensor 7.
Also in this embodiment, the same effects as those in the first embodiment and the second embodiment can be obtained.
４．第４実施形態
　第１～第３実施形態ではアンテナ素子３３とグラウンド電極３５との間でディスプレイ５に相当する部分には空気層３８が設けられていたが、適切な比誘電率が得られれば良いので、ここには空気層以外の構成を用いてもよい。
　図６を用いて、そのような実施例を第４実施形態として説明する。図６は、第４実施形態に係るディスプレイ装置の模式的断面図である。 4. Fourth Embodiment In the first to third embodiments, an air layer 38 is provided between the antenna element 33 and the ground electrode 35 in a portion corresponding to the display 5, but if an appropriate relative permittivity can be obtained, Since it is good, a configuration other than the air layer may be used here.
Such an embodiment will be described as a fourth embodiment with reference to FIG. FIG. 6 is a schematic cross-sectional view of the display device according to the fourth embodiment.
　ディスプレイ装置１は、アンテナ素子３３とグラウンド電極３５との間に配置された誘電体層４０をさらに備えている。誘電体層４０は、積層方向位置がディスプレイ５と同じである。つまり、ディスプレイ５は、一部において切り欠かれた状態になっており、その部分に誘電体層４０が充填されている。なお、誘電体層４０が充填される空間は、ディスプレイ５がタッチセンサ７やカバー部材９より例えばいずれかの辺を短くする等で面積を小さくすることによって形成されてもよい。
　誘電体層４０は、プラスチックフィルムやＯＣＡ等である。フィルム等で充填する場合は、アンテナ素子３３とグラウンド電極３５との間の距離が固定されるので、所望のアンテナ特性（共振周波数やＲｅｔｕｒｎ　Ｌｏｓｓ、放射効率等）を実現できる。また、比誘電率＞１（空気）となるので、波長短縮効果によりアンテナ素子３３のサイズを小さくできる。
　誘電体層４０の比誘電率は、通常、１．０を超えて２．５以下、好ましくは、１．５以上２．５以下である。低誘電率層の比誘電率がこの範囲にあると、アンテナ素子３３と給電線路３７の電気的結合程度をさらに小さくできる。
　なお、第１～第３実施形態に誘電体層を設けてもよい。 The display device 1 further includes a dielectric layer 40 arranged between the antenna element 33 and the ground electrode 35. The position of the dielectric layer 40 in the stacking direction is the same as that of the display 5. That is, the display 5 is in a state of being cut out in a part, and the dielectric layer 40 is filled in the part. The space filled with the dielectric layer 40 may be formed by making the area of the display 5 smaller than that of the touch sensor 7 or the cover member 9, for example, by making any side shorter.
The dielectric layer 40 is a plastic film, OCA, or the like. When filling with a film or the like, the distance between the antenna element 33 and the ground electrode 35 is fixed, so that desired antenna characteristics (resonance frequency, Return Loss, radiation efficiency, etc.) can be realized. Further, since the relative permittivity> 1 (air), the size of the antenna element 33 can be reduced due to the wavelength shortening effect.
The relative permittivity of the dielectric layer 40 is usually more than 1.0 and 2.5 or less, preferably 1.5 or more and 2.5 or less. When the relative permittivity of the low dielectric constant layer is in this range, the degree of electrical coupling between the antenna element 33 and the feeding line 37 can be further reduced.
The dielectric layer may be provided in the first to third embodiments.
５．第５実施形態
　第１～第４実施形態では、給電線路３７及び周辺回路３９が形成された基板はメインボードであったが、上記の基板はメインボードではなくてもよい。
　図７を用いて、そのような実施例を第５実施形態として説明する。図７は、第５実施形態に係るディスプレイ装置の模式的断面図である。
　第５実施形態の基本構造は、第１～第４実施形態と同じである。 5. Fifth Embodiment In the first to fourth embodiments, the board on which the power supply line 37 and the peripheral circuit 39 are formed is the main board, but the above board may not be the main board.
Such an embodiment will be described as a fifth embodiment with reference to FIG. 7. FIG. 7 is a schematic cross-sectional view of the display device according to the fifth embodiment.
The basic structure of the fifth embodiment is the same as that of the first to fourth embodiments.
　ディスプレイ装置１は、基板３の代わりに、第１基板４１と、第２基板４３を有している。
　第１基板４１は、例えば、ＰＣＢ又はＦＰＣ（Ｆｌｅｘｉｂｌｅ　ｐｒｉｎｔｅｄ　ｃｉｒｃｕｉｔｓ）からなる。第１基板４１には、給電線路３７と周辺回路３９が設けられている。 The display device 1 has a first substrate 41 and a second substrate 43 instead of the substrate 3.
The first substrate 41 is made of, for example, PCB or FPC (Flexible printed circuits). A power supply line 37 and a peripheral circuit 39 are provided on the first substrate 41.
　第２基板４３は、メインボードであり、例えばＰＣＢである。第１基板４１と第２基板４３は電気的に接続されている。
　この実施形態では、アンテナ素子３３とグラウンド電極３５の間に、誘電体層４０Ａが配置されている。誘電体層４０Ａは、第４実施形態の誘電体層４０と同じである。
　この実施形態でも、第１～第４実施形態と同様の効果が得られる。 The second board 43 is a main board, for example, a PCB. The first substrate 41 and the second substrate 43 are electrically connected.
In this embodiment, the dielectric layer 40A is arranged between the antenna element 33 and the ground electrode 35. The dielectric layer 40A is the same as the dielectric layer 40 of the fourth embodiment.
Also in this embodiment, the same effect as that of the first to fourth embodiments can be obtained.
６．第６実施形態
　第１～第５実施形態では給電線路３７と周辺回路３９は基板に設けられていたが、他の部材に設けられていてもよい。
　図８を用いて、そのような実施例を第６実施形態として説明する。図８は、第６実施形態に係るディスプレイ装置の模式的断面図である。
　第６実施形態の基本構造は、第１～第５実施形態と同じである。
　グラウンド電極３５は、ディスプレイ５の第１面５ａに形成されている。したがって、この実施形態ではディスプレイ５の積層方向位置に対応する空気層や誘電体層は形成されていない。
　給電線路３７と周辺回路３９は、ディスプレイ５の第２面５ｂ（タッチセンサ７と反対側の面）に設けられている。 6. Sixth Embodiment In the first to fifth embodiments, the power supply line 37 and the peripheral circuit 39 are provided on the substrate, but they may be provided on other members.
Such an embodiment will be described as a sixth embodiment with reference to FIG. FIG. 8 is a schematic cross-sectional view of the display device according to the sixth embodiment.
The basic structure of the sixth embodiment is the same as that of the first to fifth embodiments.
The ground electrode 35 is formed on the first surface 5a of the display 5. Therefore, in this embodiment, the air layer and the dielectric layer corresponding to the position in the stacking direction of the display 5 are not formed.
The power supply line 37 and the peripheral circuit 39 are provided on the second surface 5b (the surface opposite to the touch sensor 7) of the display 5.
　上記のように、ディスプレイ５の電極を利用して、ディスプレイ５に、グラウンド電極３５と給電線路３７を形成している。具体的には、ディスプレイ５の第１面５ａにグラウンド電極３５が形成され、ディスプレイ５の第２面５ｂに給電線路３７及び周辺回路３９が形成される。
　給電線路３７は周辺回路３９に接続されている。また周辺回路３９と基板３Ａとは電気的に接続される。
　なお、周辺回路は、ディスプレイに接続するＦＰＣ上に形成されてもよい。
　この実施形態でも、第１～第５実施形態と同様の効果が得られる。 As described above, the ground electrode 35 and the feeding line 37 are formed on the display 5 by using the electrodes of the display 5. Specifically, the ground electrode 35 is formed on the first surface 5a of the display 5, and the feeding line 37 and the peripheral circuit 39 are formed on the second surface 5b of the display 5.
The power supply line 37 is connected to the peripheral circuit 39. Further, the peripheral circuit 39 and the substrate 3A are electrically connected.
The peripheral circuit may be formed on the FPC connected to the display.
Also in this embodiment, the same effect as in the first to fifth embodiments can be obtained.
７．第７実施形態
　アンテナの種類・形状・配置についての変形例を説明する。
　図９を用いて、そのような実施例として第７実施形態を説明する。図９は、第７実施形態に係るディスプレイ装置におけるアンテナの位置を示す模式的平面図である。なお、以下の説明は第１～第６実施形態に適用可能であり、さらに他の実施形態にも適用可能である。
　図９において、アンテナ素子３３Ａは、平面視でカバー部材９の額縁領域９ｄに重なって配置されている。アンテナ素子３３Ａの寸法ＬとＷ（給電線路に平行な成分をＬ、垂直の成分をＷと定義する）において、Ｌは共振周波数を決める重要な寸法であるので、調整幅が小さい。しかし、ＷについてはＷ＜Ｌとすることが可能である。 7. Seventh Embodiment A modified example of the type, shape, and arrangement of the antenna will be described.
A seventh embodiment will be described as such an embodiment with reference to FIG. FIG. 9 is a schematic plan view showing the position of the antenna in the display device according to the seventh embodiment. The following description is applicable to the first to sixth embodiments, and is also applicable to other embodiments.
In FIG. 9, the antenna element 33A is arranged so as to overlap the frame region 9d of the cover member 9 in a plan view. In the dimensions L and W of the antenna element 33A (the component parallel to the feeding line is defined as L and the component perpendicular to the feeding line is defined as W), L is an important dimension for determining the resonance frequency, so the adjustment range is small. However, for W, it is possible to set W <L.
　この実施形態では、給電線路３７は、カバー部材９の額縁領域９ｄの延びる方向に対して水平に配置されて、アンテナ素子３３Ａに接続している。したがって、アンテナ素子３３ＡのＷを小さくでき、ひいては例えばカバー部材９の額縁領域９ｄの幅が狭い場合でも効率の良いアンテナを設計できる。
　他の効果として、給電線路３７の向きを上記のように設定することで、例えばカバー部材９の額縁領域９ｄを狭くできる。 In this embodiment, the power feeding line 37 is arranged horizontally with respect to the extending direction of the frame region 9d of the cover member 9 and is connected to the antenna element 33A. Therefore, the W of the antenna element 33A can be reduced, and an efficient antenna can be designed even when the width of the frame region 9d of the cover member 9 is narrow, for example.
As another effect, by setting the direction of the power supply line 37 as described above, for example, the frame region 9d of the cover member 9 can be narrowed.
８．第８実施形態
　第７実施形態ではアンテ素子３３Ａは、パッチアンテナ単体であったが、パッチアレーアンテナでもよい。
　図１０を用いて、そのような実施例を第８実施形態として説明する。図１０は、第８実施形態におけるディスプレイ装置におけるアンテナ素子の位置を示す模式的平面図である。
　この実施形態でも、複数の給電線路３７は、カバー部材９の額縁領域９ｄの延びる方向に対して水平に配置されて、複数のアンテナ素子３３Ｂそれぞれに接続している。したがって、アンテナ素子３３ＢはＷを小さくでき、ひいてはカバー部材９の額縁領域９ｄの幅が狭い場合でも効率の良いアンテナを設計できる。 8. Eighth Embodiment In the seventh embodiment, the ante element 33A is a single patch antenna, but a patch array antenna may also be used.
Such an embodiment will be described as an eighth embodiment with reference to FIG. FIG. 10 is a schematic plan view showing the positions of the antenna elements in the display device according to the eighth embodiment.
Also in this embodiment, the plurality of power feeding lines 37 are arranged horizontally with respect to the extending direction of the frame region 9d of the cover member 9 and are connected to each of the plurality of antenna elements 33B. Therefore, the W of the antenna element 33B can be reduced, and an efficient antenna can be designed even when the width of the frame region 9d of the cover member 9 is narrow.
９．第９実施形態
　図１１を用いて、パッチアレーアンテナの他の実施例を第９実施形態として説明する。
図１１は、第９実施形態におけるディスプレイ装置におけるアンテナの位置を示す模式的平面図である。なお、以下の説明は第１～第６実施形態に適用可能であり、さらに他の実施形態にも適用可能である。
　この実施形態では、給電線路３７は、カバー部材９の額縁領域９ｄに対して垂直に延びて、アンテナ素子３３Ｃに接続している。この場合、アンテナ素子３３Ｃをアレイ状に形成する場合に高集積化が可能であり、また、アンテナ素子３３Ｃ間の距離の調整代が増えることでアレイ化の設計自由度が増える。 9. Ninth Embodiment With reference to FIG. 11, another embodiment of the patch array antenna will be described as the ninth embodiment.
FIG. 11 is a schematic plan view showing the position of the antenna in the display device according to the ninth embodiment. The following description is applicable to the first to sixth embodiments, and is also applicable to other embodiments.
In this embodiment, the power feeding line 37 extends perpendicularly to the frame region 9d of the cover member 9 and is connected to the antenna element 33C. In this case, when the antenna elements 33C are formed in an array, high integration is possible, and the degree of freedom in designing the array is increased by increasing the adjustment allowance for the distance between the antenna elements 33C.
１０．第１０実施形態
　アンテナ素子３３は、カバー部材９の表示領域９ｃに配置されてもよい。その場合は、アンテナ素子３３は、可視光透明な導電膜で作成されることが好ましい。例えば、アンテナ素子３３は、ＩＴＯ（酸化インジウム・スズ）、透明導電性インク（例えば銀ナノワイヤーインク）から形成されてもよい。 10. The tenth embodiment antenna element 33 may be arranged in the display area 9c of the cover member 9. In that case, the antenna element 33 is preferably made of a conductive film that is transparent to visible light. For example, the antenna element 33 may be formed of ITO (indium tin oxide) or transparent conductive ink (for example, silver nanowire ink).
１１．他の実施形態
　以上、本発明の一実施形態について説明したが、本発明は上記実施形態に限定されるものではなく、発明の要旨を逸脱しない範囲で種々の変更が可能である。特に、本明細書に書かれた複数の実施形態及び変形例は必要に応じて任意に組み合せ可能である。
　本発明は静電容量方式のタッチパネル以外にも適用でき、例えば抵抗膜式のタッチパネルにおいて実施することができる。
　本発明は５Ｇ用アンテナ以外にも適用でき、３Ｇ、４Ｇ、Ｗｉｆｉ等の他の通信方式のアンテナとしても利用できる。 11. Other Embodiments Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the invention. In particular, the plurality of embodiments and modifications described herein can be arbitrarily combined as needed.
The present invention can be applied to other than the capacitance type touch panel, and can be implemented, for example, in a resistive touch panel.
The present invention can be applied to antennas other than 5G antennas, and can also be used as antennas for other communication methods such as 3G, 4G, and Wifi.
　本発明は、アンテナ及びタッチセンサを有するディスプレイ装置に広く適用できる。 The present invention can be widely applied to a display device having an antenna and a touch sensor.
１　　　：ディスプレイ装置
３　　　：基板
５　　　：ディスプレイ
７　　　：タッチセンサ
８　　　：第２接着層
９　　　：カバー部材
３１　　：アンテナ構造
３３　　：アンテナ素子
３５　　：グラウンド電極
３７　　：給電線路
３８　　：空気層
３９　　：周辺回路
４０　　：誘電体層 1: Display device 3: Substrate 5: Display 7: Touch sensor 8: Second adhesive layer 9: Cover member 31: Antenna structure 33: Antenna element 35: Ground electrode 37: Power supply line 38: Air layer 39: Peripheral circuit 40: Dielectric layer

Claims (6)

  1. 　第１面と第２面を有するディスプレイと、
    　前記ディスプレイの前記第１面側に配置されたタッチセンサと、
    　前記ディスプレイの前記第２面側に配置された基板と、
    　積層方向において前記ディスプレイの前記第１面側に配置されたアンテナ素子と、前記アンテナ素子から前記ディスプレイ側に離れて対向配置されたグラウンド電極と、前記ディスプレイの前記第２面側に配置された給電線路を有するアンテナ構造と、
    　前記給電線路に接続された周辺回路と、
    を備えたディスプレイ装置。     A display with a first side and a second side,
    A touch sensor arranged on the first surface side of the display and
    A substrate arranged on the second surface side of the display and
    An antenna element arranged on the first surface side of the display in the stacking direction, a ground electrode arranged so as to face the display side away from the antenna element, and a power supply arranged on the second surface side of the display. Antenna structure with railroad tracks
    Peripheral circuits connected to the power supply line and
    Display device equipped with.
  2. 　前記アンテナ素子は、前記タッチセンサの前記ディスプレイと反対側に設けられている、請求項１に記載のディスプレイ装置。 The display device according to claim 1, wherein the antenna element is provided on the opposite side of the touch sensor to the display.
  3. 　前記アンテナ素子と前記グラウンド電極との間に配置された空気層をさらに備えている、請求項１又は２に記載のディスプレイ装置。 The display device according to claim 1 or 2, further comprising an air layer arranged between the antenna element and the ground electrode.
  4. 　前記アンテナ素子と前記グラウンド電極との間に配置された誘電体層をさらに備えている、請求項１又は２に記載のディスプレイ装置。 The display device according to claim 1 or 2, further comprising a dielectric layer arranged between the antenna element and the ground electrode.
  5. 　前記給電線路と前記周辺回路は、前記基板の前記ディスプレイと反対側の面に設けられている、請求項１～４のいずれかに記載のディスプレイ装置。 The display device according to any one of claims 1 to 4, wherein the power supply line and the peripheral circuit are provided on a surface of the substrate opposite to the display.
  6. 　前記給電線路と前記周辺回路は、前記ディスプレイの前記第２面側に設けられている、請求項１又は２に記載のディスプレイ装置。 The display device according to claim 1 or 2, wherein the power supply line and the peripheral circuit are provided on the second surface side of the display.
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Citations (4)

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JP2016086260A (en) * 2014-10-24 2016-05-19 株式会社村田製作所 Antenna device
WO2016190506A1 (en) * 2015-05-22 2016-12-01 Samsung Electronics Co., Ltd. Display module and method of manufacturing the same
WO2017126863A1 (en) * 2016-01-21 2017-07-27 삼성전자 주식회사 Antenna device, and electronic device comprising same
US20180034130A1 (en) * 2016-07-28 2018-02-01 Samsung Display Co., Ltd. Display device for mobile electronic device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016086260A (en) * 2014-10-24 2016-05-19 株式会社村田製作所 Antenna device
WO2016190506A1 (en) * 2015-05-22 2016-12-01 Samsung Electronics Co., Ltd. Display module and method of manufacturing the same
WO2017126863A1 (en) * 2016-01-21 2017-07-27 삼성전자 주식회사 Antenna device, and electronic device comprising same
US20180034130A1 (en) * 2016-07-28 2018-02-01 Samsung Display Co., Ltd. Display device for mobile electronic device

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JP6902064B2 (en) 2021-07-14
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