WO2020213403A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage 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
Authority
WO
WIPO (PCT)
Prior art keywords
display
antenna
antenna element
display device
touch sensor
Prior art date
Application number
PCT/JP2020/015073
Other languages
English (en)
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/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
    • H01Q1/12—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

Le problème décrit par la présente invention est de fournir un espace d'agencement à une antenne dans un dispositif d'affichage. La solution selon l'invention porte sur un dispositif d'affichage 1 qui comporte un afficheur 5, un capteur tactile 7, un substrat 3, une structure d'antenne 31 et un circuit périphérique 39. L'afficheur 5 comporte une première surface 5a et une seconde surface 5b. Le capteur tactile 7 est disposé sur le côté de première surface 5a de l'afficheur 5. Le substrat 3 est disposé sur le second côté de surface 5b de l'afficheur 5. La structure d'antenne 31 présente, dans la direction de stratification, un élément d'antenne 33 qui est disposé sur le côté de première surface 5a de l'afficheur 5, une électrode de masse 35 espacée de l'élément d'antenne 33 et opposée à celui-ci sur le côté de l'afficheur 5, et une ligne d'alimentation électrique 37 disposée sur le second côté de surface 5b de l'afficheur 5. Le circuit périphérique 39 est connecté à la ligne d'alimentation électrique 37.
PCT/JP2020/015073 2019-04-17 2020-04-01 Dispositif d'affichage WO2020213403A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-078721 2019-04-17
JP2019078721A JP6902064B2 (ja) 2019-04-17 2019-04-17 ディスプレイ装置

Publications (1)

Publication Number Publication Date
WO2020213403A1 true WO2020213403A1 (fr) 2020-10-22

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JP (1) JP6902064B2 (fr)
TW (1) TW202105833A (fr)
WO (1) WO2020213403A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016086260A (ja) * 2014-10-24 2016-05-19 株式会社村田製作所 アンテナ装置
WO2016190506A1 (fr) * 2015-05-22 2016-12-01 Samsung Electronics Co., Ltd. Module d'affichage et procédé de fabrication associé
WO2017126863A1 (fr) * 2016-01-21 2017-07-27 삼성전자 주식회사 Dispositif d'antenne, et dispositif électronique comprenant celui-ci
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 (ja) * 2014-10-24 2016-05-19 株式会社村田製作所 アンテナ装置
WO2016190506A1 (fr) * 2015-05-22 2016-12-01 Samsung Electronics Co., Ltd. Module d'affichage et procédé de fabrication associé
WO2017126863A1 (fr) * 2016-01-21 2017-07-27 삼성전자 주식회사 Dispositif d'antenne, et dispositif électronique comprenant celui-ci
US20180034130A1 (en) * 2016-07-28 2018-02-01 Samsung Display Co., Ltd. Display device for mobile electronic device

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JP2020178217A (ja) 2020-10-29
JP6902064B2 (ja) 2021-07-14

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