WO2012147817A1 - Instrument électronique - Google Patents

Instrument électronique Download PDF

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Publication number
WO2012147817A1
WO2012147817A1 PCT/JP2012/061139 JP2012061139W WO2012147817A1 WO 2012147817 A1 WO2012147817 A1 WO 2012147817A1 JP 2012061139 W JP2012061139 W JP 2012061139W WO 2012147817 A1 WO2012147817 A1 WO 2012147817A1
Authority
WO
WIPO (PCT)
Prior art keywords
electronic device
antenna element
case
display device
disposed
Prior art date
Application number
PCT/JP2012/061139
Other languages
English (en)
Japanese (ja)
Inventor
河原　秀規
Original Assignee
株式会社Ｊｖｃケンウッド
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 株式会社Ｊｖｃケンウッド filed Critical 株式会社Ｊｖｃケンウッド
Publication of WO2012147817A1 publication Critical patent/WO2012147817A1/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
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • 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
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/22—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of a single substantially straight conductive element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

  • the present invention relates to an electronic device having an antenna.
  • antennas having parasitic elements are used (parasitic elements) (see, for example, Patent Documents 1 and 2).
  • the parasitic element is arranged so as to be separated from the radiating element (parasitic element) connected to the feeder line by an electrical length of 1 ⁇ 4 wavelength of the operating frequency.
  • the parasitic element functions as a director or a resonator, and contributes to improvement of the directivity pattern of the antenna, higher gain, or wider bandwidth.
  • the electronic device may continuously perform transmission and reception while being placed in the bag.
  • an electronic device may be required to continuously receive radio waves from a GPS (Global Positioning System) satellite regardless of which direction the electronic device is facing.
  • An antenna mounted on such an electronic device is required to have a directivity pattern with little directivity.
  • an antenna When disposing a radiating element on a printed circuit board, an antenna may be formed using a printed wiring pattern, but the use of a chip antenna is effective for reducing the mounting area.
  • a chip antenna is an antenna product that is modularized so that it can be mounted on the surface of a printed circuit board.
  • the chip antenna is small by using a material with a large relative permittivity and relative permeability (that is, a large wavelength shortening effect) as a base material. Sizing is planned.
  • a printed circuit board is generally disposed at a position facing the back surface of the display device.
  • the back and side surfaces of the display device are covered with a metal shielding case.
  • the shield case of the display device functions as an antenna (waveguide or reflector) and the electric field radiated from the shield case becomes relatively strong.
  • the electric field radiated in the direction where the shield case does not exist is relatively weak.
  • the ground wiring pattern provided on the printed circuit board also functions as an antenna and affects the directivity pattern.
  • the present invention has been made on the basis of the above-described examination by the inventors of the present application.
  • an antenna radiatating element
  • a directivity pattern is formed. The purpose is to improve.
  • the electronic apparatus includes a case, a display device, a circuit board, and first and second antenna elements.
  • the case has an opening.
  • the display device is disposed in the case and has a display surface visible from the outside through the opening and a back surface covered with a conductive shield material.
  • the circuit board is disposed in the case so as to face the back surface of the display device, and an electronic component including a wireless communication circuit is mounted thereon.
  • the first antenna element is disposed on the circuit board so as to be positioned in a frame region that does not overlap the display device when viewed from a front side of the electronic device perpendicular to the display surface, and the wireless communication circuit And are connected by a feeder line.
  • the second antenna element is at least partially located in the frame region when viewed from the front side, and at least part of the second antenna element when viewed from the side of the electronic device.
  • the parasitic element is a parasitic element arranged so as to be located on the display surface side from the back surface.
  • the first antenna element has an elongated shape, and the at least part of the second antenna element is substantially parallel to a longitudinal direction of the first antenna element. May be arranged.
  • the frame region may have four sides surrounding the opening.
  • the second antenna element may have an L-shape and may be disposed across two adjacent sides of the frame region when viewed from the front side.
  • the second antenna element may be provided in contact with the outer surface of the case.
  • the case may include a frame member surrounding the opening.
  • the at least part of the second antenna element may be provided in contact with a portion of the frame member that is located outside the first antenna element when viewed from the front side.
  • the second antenna element may be a conductive film attached to the case.
  • the electronic device may further include a dielectric cover member that covers at least a portion of the case where the second antenna element is provided.
  • the first antenna element may be disposed on a surface of the two main surfaces of the circuit board that does not face the display device.
  • an interval between the first antenna element and the second antenna element is preferably an electrical length of 1 ⁇ 4 wavelength or less at a use frequency.
  • the length of the second antenna element in the longitudinal direction may be an electrical length of 1 ⁇ 2 wavelength or less at the use frequency.
  • the directivity pattern can be improved when an antenna (radiating element) is disposed on a circuit board positioned opposite to the back surface of the display device.
  • FIG. 1 is a block diagram illustrating a functional configuration example of the electronic apparatus according to the first embodiment.
  • FIG. 2 is a projection view illustrating an external configuration example of the electronic apparatus according to the first embodiment.
  • 3A is a front perspective view of the electronic apparatus according to Embodiment 1.
  • FIG. 3B is a cross-sectional perspective view of the electronic apparatus according to Embodiment 1.
  • FIG. 4 is a perspective view illustrating an external configuration example of the electronic apparatus according to the first embodiment.
  • FIG. 5A is a diagram showing a measurement result of antenna directivity (yz plane) of the electronic apparatus according to Embodiment 1.
  • FIG. 5B is a diagram showing a measurement result of antenna directivity (yz plane) of the electronic device according to Embodiment 1.
  • 5C is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic device according to Embodiment 1.
  • 6A is a diagram showing a measurement result of antenna directivity (zx plane) of the electronic apparatus according to Embodiment 1.
  • FIG. 6B is a diagram showing a measurement result of antenna directivity (zx plane) of the electronic device according to Embodiment 1.
  • FIG. 6C is a diagram illustrating a measurement result of antenna directivity (zx plane) of the electronic device according to Embodiment 1.
  • FIG. FIG. 7A is a diagram showing a measurement result of antenna directivity (xy plane) of the electronic device according to Embodiment 1.
  • FIG. 7B is a diagram showing a measurement result of antenna directivity (xy plane) of the electronic device according to Embodiment 1.
  • FIG. 7C is a diagram illustrating a measurement result of antenna directivity (xy plane) of the electronic device according to Embodiment 1.
  • FIG. 8A is a diagram illustrating a measurement result of antenna directivity (yz plane) of an electronic device according to a comparative example.
  • FIG. 8B is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic device according to the comparative example.
  • FIG. 8C is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic device according to the comparative example.
  • FIG. 8A is a diagram illustrating a measurement result of antenna directivity (yz plane) of an electronic device according to a comparative example.
  • FIG. 8B is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic device according to the comparative example.
  • FIG. 9A is a diagram illustrating a measurement result of antenna directivity (zx plane) of an electronic device according to a comparative example.
  • FIG. 9B is a diagram illustrating a measurement result of antenna directivity (zx plane) of the electronic device according to the comparative example.
  • FIG. 9C is a diagram illustrating a measurement result of antenna directivity (zx plane) of the electronic device according to the comparative example.
  • FIG. 10A is a diagram illustrating a measurement result of antenna directivity (xy plane) of an electronic device according to a comparative example.
  • FIG. 10B is a diagram illustrating a measurement result of the antenna directivity (xy plane) of the electronic device according to the comparative example.
  • FIG. 10A is a diagram illustrating a measurement result of antenna directivity (xy plane) of an electronic device according to a comparative example.
  • FIG. 10B is a diagram illustrating a measurement result of the antenna directivity (xy plane) of the electronic device according to the comparative example
  • FIG. 10C is a diagram illustrating a measurement result of the antenna directivity (xy plane) of the electronic device according to the comparative example.
  • FIG. 11A is a front perspective view of the electronic apparatus according to Embodiment 2.
  • FIG. 11B is a cross-sectional perspective view of the electronic apparatus according to Embodiment 2.
  • 12A is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic apparatus according to Embodiment 2.
  • FIG. FIG. 12B is a diagram illustrating a measurement result of antenna directivity (yz plane) of the electronic device according to Embodiment 2.
  • FIG. 13A is a front perspective view of an electronic apparatus according to another embodiment.
  • FIG. 13B is a side perspective view of an electronic apparatus according to another embodiment.
  • FIG. 14A is a front perspective view of an electronic apparatus according to another embodiment.
  • FIG. 14B is a side perspective view of an electronic apparatus according to another embodiment.
  • FIG. 15A is a front perspective view of an electronic apparatus according to another embodiment.
  • FIG. 15B is a cross-sectional perspective view of an electronic apparatus according to another embodiment.
  • FIG. 16A is a front perspective view of an electronic device according to another embodiment.
  • FIG. 16B is a side perspective view of an electronic apparatus according to another embodiment.
  • the electronic device 1 is a portable electronic device having a wireless communication circuit.
  • the electronic device 1 is, for example, a smartphone or a tablet PC.
  • FIG. 1 is a block diagram illustrating a functional configuration example of the electronic device 1.
  • the wireless communication circuit 11 is a wireless transmitter, a wireless receiver, or a wireless transceiver. That is, the wireless communication circuit 11 performs protocol processing and signal processing related to wireless communication, and performs at least one of transmission and reception of a wireless signal using the antenna 10.
  • the wireless communication circuit 11 is, for example, a GPS receiver chip or a wireless LAN (Local Area Network) chip.
  • the display device 12 has a display surface capable of displaying an image.
  • Specific examples of the display device 12 include an LCD (Liquid Crystal Display) and an organic EL (Electroluminescence) display.
  • the display device 12 has a structure in which a display panel (eg, a liquid crystal panel or an organic EL panel) and a circuit board on which semiconductor electronic components including a driver for driving the display panel are mounted are accommodated in a conductive shield case. . That is, the back surface facing the display surface of the display device 12 and the side surface of the display device 12 are covered with the conductive shield material.
  • the input device 13 is a device for accepting a user operation on the electronic device 1. Specific examples of the input device 13 include operation buttons and switches having physical entities, a touch panel, a microphone, and a camera. When the input device 13 is a touch panel, the touch panel is integrally disposed on the display surface of the display device 12.
  • the microprocessor 14 executes an OS (Operating System) and application programs, and performs overall control of the electronic device 1 and provision of functions desired by the user.
  • the OS and application program are loaded from a ROM (Read Only Memory) 16 or a flash memory 17 into a RAM (Random Access Memory) 15.
  • the microprocessor 14 executes a program loaded on the RAM 15.
  • the above-described semiconductor electronic components including the wireless communication circuit 11, the microprocessor 14, the RAM 15, the ROM 16, and the flash memory 17 may be integrally disposed on one printed wiring board or on a plurality of printed wiring boards. It may be distributed.
  • FIGS. 2A to 2C are projection views showing an example of the external configuration of the electronic apparatus 1.
  • FIG. FIG. 2A is a front view of the display device 12 as viewed from the display surface 120 side.
  • 2B is a left side view
  • FIG. 2C is a top view.
  • the three buttons 130 shown in FIG. 2 are specific examples of the input device 13.
  • the case 2 has an opening 20 and frame members 21 to 24 surrounding the opening 20.
  • the case 2 is made of, for example, a synthetic resin or a carbon fiber reinforced resin.
  • a cavity having an opening 20 is formed by the frame members 21 to 24.
  • a circuit board on which semiconductor devices including the display device 12 and the wireless communication circuit 11 are mounted is disposed.
  • the display device 12 is disposed in the cavity of the case 2 so that the display surface 120 can be visually recognized from the outside through the opening 20.
  • the display surface 120 may be protected by a front panel (not shown) formed of glass or synthetic resin that transmits visible light.
  • a circuit board on which semiconductor electronic components including the wireless communication circuit 11 are mounted is disposed in the cavity of the case 2 so as to face the back surface of the display device 12.
  • the antenna 10 includes a radiating element (feeding element) 101 and a parasitic element 102 without feeding.
  • the radiating element 101 is disposed on a printed circuit board on which the wireless communication circuit 11 is mounted.
  • the radiating element 101 may be a chip antenna mounted on the surface of the circuit board, or an antenna pattern formed on the circuit board by printed wiring.
  • the radiating element 101 is connected to the wireless communication circuit 11 arranged on the circuit board by a feeder line formed by a pattern on the board.
  • the polarization characteristics of the radiating element 101 may be linearly polarized waves or circularly polarized waves. *
  • the parasitic element 102 is disposed away from the radiating element 101.
  • the parasitic element 102 may be a thin plate (for example, a sheet metal) or a film (for example, a metal tape having a thin metal and a paste) formed of a conductive material such as metal. What is necessary is just to adjust suitably the space
  • the distance between the radiating element 101 and the parasitic element 102 may be set to an electrical length of 1 ⁇ 4 wavelength of the use frequency or less so that the parasitic element 102 effectively functions as a director.
  • FIG. 3A and 3B are diagrams illustrating a specific example of the arrangement of the radiating element 101 and the parasitic element 102.
  • FIG. 3A is a perspective view seen from the front direction of the electronic apparatus 1.
  • the case 2, the display device 12, and the button 130 are indicated by broken lines, and the circuit board 3, the radiating element 101, and the parasitic element 102 located below the case 2 and the display device 12 are illustrated.
  • FIG. 3B is a cross-sectional perspective view showing the inside of the cavity when the case 2 is cut along the cutting line I in FIG.
  • illustration of case 2 is abbreviate
  • the shield case 121 shown in FIG. 3B is a conductive shield material that covers the side surface and the back surface of the display device 12 to prevent noise.
  • the circuit board 3 is a printed circuit board on which semiconductor electronic components including a wireless communication circuit 11 and a microcontroller are mounted.
  • the radiating element 101 is disposed on the circuit board 3 and is connected to the wireless communication circuit 11 by the feeder line 30.
  • the radiating element 101 is a chip antenna that is surface-mounted on the circuit board 3.
  • the radiating element 101 is arranged in a frame region that does not overlap the display device 12 when viewed from the front side of the electronic device 1 perpendicular to the display surface 120. Specifically, the radiating element 101 is located below the frame member 21 located on the left side of the sheet of FIG.
  • the parasitic element 102 is at least partially disposed in a frame region (that is, a region that does not overlap the display device 12 when viewed from the front side). Further, as is apparent from FIG. 3B, the parasitic element 102 is at least partially above the rear surface covered with the shield case 121 of the display device 12 when viewed from the side surface side of the electronic device 1. It arrange
  • the radiating element 101 and the parasitic element 102 are arranged in the frame region, the distance between the radiating element 101 and the parasitic element 102 and the shield case 121 can be increased. For this reason, it can suppress that the shield case 121 operate
  • the parasitic element 102 is disposed on the display surface 120 side above the back surface of the display device 12. For this reason, the parasitic element 102 functioning as a director can efficiently radiate an electric field toward the left side in FIG. 3A. Therefore, the electronic device 1 can obtain a uniform directivity pattern including the front surface, the side surface, and the back surface of the electronic device 1 in the left direction in FIG. 3A.
  • the following may be devised to improve the directivity pattern.
  • at least a part of the parasitic element 102 described above may be disposed substantially parallel to the longitudinal direction of the radiating element 101 having an elongated shape.
  • bonding of the radiation element 101 and the parasitic element 102 can be strengthened.
  • substantially parallel means that the coupling between the radiating element 101 and the parasitic element 102 may not be strictly parallel including a certain error range as long as the coupling between the radiating element 101 and the parasitic element 102 can be enhanced.
  • the length of the parasitic element 102 may be about an electrical length 1 ⁇ 2 wavelength of the used frequency.
  • the parasitic element effectively functions as a waveguide when the electrical length of the parasitic element is slightly shorter (approximately 5%) than the 1 ⁇ 2 wavelength. Therefore, the length of the parasitic element 102 according to the present embodiment may be slightly shorter (approximately about 5%) than the electrical length 1 ⁇ 2 wavelength of the operating frequency.
  • the radiating element 101 may be disposed on a surface that does not oppose the back surface of the display device 12 among the two main surfaces of the circuit board 3. Thereby, since the distance between the radiating element 101 and the shield case 121 covering the back surface of the display device 12 can be further increased, the coupling between the radiating element 101 and the shield case 121 can be weakened.
  • the parasitic element 102 may be disposed so as to contact the inside or the outside of the case 2 (that is, the frame member 21). More specifically, the parasitic element 102 may be disposed by attaching a conductive film or a conductive thin plate to the inside or the outside of the case 2 (that is, the frame member 21).
  • FIG. 4 shows a state in which a conductive film is used as the parasitic element 102 and the parasitic element 102 is attached to the outside of the case 2. As shown in FIG. 4, by adopting a form in which a metal tape is affixed to the outside of the case 2 among the parasitic elements 102, workability is improved and fine adjustment of the directivity pattern is facilitated. In addition, as shown in FIG.
  • the thickness of the parasitic element 102 can be suppressed, so that the parasitic element 102 can be arranged in a limited space of the electronic device 1. Furthermore, by using a metal tape, it can be processed into various shapes and can be attached to an uneven surface, so that workability is further improved and fine adjustment of the directivity pattern is easier. Become.
  • the parasitic element 102 When the parasitic element 102 is attached to the outside of the case 2, the parasitic element 102 may be covered with a cover 25 as shown in FIG.
  • the cover 25 is configured to cover at least a portion of the case 2 where the parasitic element 102 is provided. Thereby, damage to the parasitic element 102 can be prevented.
  • the cover 25 may be formed of a dielectric material such as synthetic resin.
  • the measurement result when the antenna 10 is a GPS receiving antenna is shown.
  • the frequency used is 1575.42 MHz corresponding to the GPS signal.
  • the radiating element 101 is a chip antenna having a helical structure with an electrical length of 1 ⁇ 4 wavelength.
  • the parasitic element 102 is a conductive film in which a conductive film is attached to the outside of the frame member 21. Further, a configuration in which the parasitic element 102 is covered with the cover 25 is employed. At present, the half wavelength at the operating frequency is about 95 mm, but the length of the parasitic element 102 is set to 49 mm in order to obtain the wavelength shortening effect by the cover 25 and the conductive film material.
  • 5B and 5C are diagrams showing directivity patterns of the electronic device 1 according to the present embodiment.
  • 5B and 5C show measurement results on the yz plane (see FIG. 5A) that is horizontal to the display surface 120.
  • FIG. 5B shows the measurement result of vertical polarization
  • FIG. 5C shows the measurement result of horizontal polarization.
  • FIGS. 6B and 6C are diagrams showing directivity patterns of the electronic apparatus 1 according to the present embodiment.
  • 6B and 6C show the measurement results of the zx plane perpendicular to the display surface 120 (see FIG. 6A).
  • FIG. 6B shows the measurement result of vertical polarization
  • FIG. 6C shows the measurement result of horizontal polarization.
  • 7B and 7C are diagrams showing directivity patterns of the electronic apparatus 1 according to the present embodiment.
  • 7B and 7C show the measurement results of the xy plane (see FIG. 7A) perpendicular to the display surface 120.
  • FIG. 7B shows the measurement result of vertical polarization
  • FIG. 7C shows the measurement result of horizontal polarization.
  • FIG. 8B and FIG. 8C are diagrams showing directivity patterns of comparative examples that do not have the parasitic element 102.
  • the comparative example has the same configuration as the electronic device 1 except that the parasitic element 102 is not included.
  • 8B and 8C show the measurement results of the yz plane (see FIG. 8A) that is horizontal with respect to the display surface 120.
  • FIG. 8B shows the measurement result of vertical polarization
  • FIG. 8C shows the measurement result of horizontal polarization.
  • FIG. 9B and FIG. 9C are diagrams showing directivity patterns of comparative examples.
  • 9B and 9C show the measurement results of the zx plane perpendicular to the display surface 120 (see FIG. 9A).
  • FIG. 9B shows the measurement result of vertical polarization
  • FIG. 9C shows the measurement result of horizontal polarization.
  • 10B and 10C are diagrams showing directivity patterns of comparative examples. 10B and 10C show the measurement results of the xy plane (see FIG. 10A) perpendicular to the display surface 120. FIG. FIG. 10B shows the measurement result of vertical polarization, and FIG. 10C shows the measurement result of horizontal polarization.
  • the effect of the parasitic element 102 is remarkable in the measurement result of the horizontal polarization of the yz plane shown in FIG. 5C. Comparing FIG. 5C and FIG. 8C, in FIG. 5C, the gain in the direction from 300 degrees to 0 degrees is improved by about 5 dB. The effect of the parasitic element 102 is also remarkable in the measurement result of the zx-plane vertical polarization shown in FIG. 6B. Comparing FIG. 6B and FIG. 9B, in FIG. 6B, the gains in the 0 to 60 degree direction and the 300 to 0 degree direction are improved by about 4 to 5 dB, and the directivity pattern is improved.
  • FIGS. 11A and 11B are diagrams illustrating specific examples of the arrangement of the radiation element 101 and the parasitic element 102 in the electronic apparatus 4 according to the present embodiment.
  • the parasitic element 102 of the present embodiment has an L shape and is disposed across two adjacent sides of a frame region surrounding the display surface 120 when viewed from the front side. .
  • the parasitic element 102 is disposed across the frame region formed by the frame members 21 and 22 on two adjacent sides.
  • the entire parasitic element 102 does not need to be located in the frame region, and at least a part of the parasitic element 102 may be located in the frame region.
  • FIG. 12B is a diagram showing a directivity pattern of the electronic device 4.
  • FIG. 12B shows the measurement result of the yz plane (see FIG. 12A) that is horizontal to the display surface 120. That is, FIG. 12B corresponds to FIG. 5C of the first embodiment. Comparing FIG. 12B and FIG. 5C, in FIG. 12B, the gain from 300 degrees to 0 degrees is further improved by about 5 dB.
  • the directivity pattern can be further improved by disposing the L-shaped parasitic element 102 across the two sides of the frame region.
  • the L-shaped parasitic element 102 described in this embodiment includes not only a shape bent at a right angle as shown in FIG. 11A but also an element having a bending angle larger than 90 degrees and a small element.
  • the L-shaped parasitic element 102 described in this embodiment includes an element in which a bent portion is curved.
  • FIGS. 13A and 13B show other variations relating to the shape of the parasitic element 102.
  • FIG. The electronic device 5 shown in FIGS. 13A and 13B includes a parasitic element 102 attached on the side surface of the case 2.
  • the electronic device 6 shown in FIGS. 14A and 14B includes an L-shaped parasitic element 102 that is pasted across two adjacent side surfaces of the case 2.
  • the electronic device 7 shown in FIGS. 15A and 15B includes an L-shaped parasitic element 102 that is pasted from the upper surface of the frame member 21 to the side surface of the adjacent frame member 22.
  • 16A and 16B includes an L-shaped parasitic element 102 that is pasted from the side surface of the frame member 21 to the upper surface of the adjacent frame member 22.
  • the electronic device 5 having the linear parasitic element 102 can improve the directivity pattern based on the same principle as the electronic device 1 described in the first embodiment.
  • the electronic devices 6 to 8 having the L-shaped parasitic element 102 can improve the directivity pattern based on the same principle as that of the electronic device 4 described in the second embodiment.
  • a linear shape and an L-shape are shown as specific examples of the shape of the parasitic element 102.
  • the shape of the parasitic element 102 may be other shapes (for example, a meander shape).

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Abstract

La présente invention concerne un dispositif d'affichage (12) qui comporte : une face d'affichage (120) disposée à l'intérieur d'un boîtier (2) d'un instrument électronique (1), et visible à partir de l'extérieur à travers une ouverture (20) ; et une face arrière qui est couverte par un boîtier de blindage conducteur (121). Une carte de circuit imprimé (3) est disposée à l'intérieur du boîtier (2), afin d'être orientée vers la face arrière du dispositif d'affichage (12). Un élément émetteur (101) est disposé sur la carte de circuit imprimé (3), de manière telle à être positionné à l'intérieur d'une zone de cadre qui ne chevauche pas le dispositif d'affichage (12) lorsque l'instrument électronique (1) est vu à partir du côté face avant, et est connecté par une ligne d'alimentation électrique à un circuit de communication sans fil (11). Un élément parasite (102) est disposé de manière telle à ce qu'au moins une partie dudit élément parasite soit positionnée dans la zone de cadre lorsque l'instrument électronique (1) est vu à partir du côté face avant, et positionné sur le côté de la face d'affichage (120) à partir de la face arrière du dispositif d'affichage (12) lorsque l'instrument électronique (1) est vu à partir d'un coté face latérale.
PCT/JP2012/061139 2011-04-28 2012-04-25 Instrument électronique WO2012147817A1 (fr)

Applications Claiming Priority (2)

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JP2011-101275 2011-04-28
JP2011101275A JP2012235224A (ja) 2011-04-28 2011-04-28 電子機器

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WO2012147817A1 true WO2012147817A1 (fr) 2012-11-01

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CN106605335A (zh) * 2014-12-08 2017-04-26 松下知识产权经营株式会社 天线以及电气设备
CN111542966A (zh) * 2018-01-03 2020-08-14 三星电子株式会社 显示设备和天线组件

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JP6179123B2 (ja) 2013-02-21 2017-08-16 セイコーエプソン株式会社 アンテナ内蔵式電子時計
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