WO2011121957A1 - 無線通信装置、インピーダンス調整方法、筐体位置検出方法および情報表示方法 - Google Patents
無線通信装置、インピーダンス調整方法、筐体位置検出方法および情報表示方法 Download PDFInfo
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- WO2011121957A1 WO2011121957A1 PCT/JP2011/001761 JP2011001761W WO2011121957A1 WO 2011121957 A1 WO2011121957 A1 WO 2011121957A1 JP 2011001761 W JP2011001761 W JP 2011001761W WO 2011121957 A1 WO2011121957 A1 WO 2011121957A1
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- conductor
- state
- wireless communication
- housing
- communication device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
- H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
- H04M1/0225—Rotatable telephones, i.e. the body parts pivoting to an open position around an axis perpendicular to the plane they define in closed position
- H04M1/0227—Rotatable in one plane, i.e. using a one degree of freedom hinge
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/006—Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2250/00—Details of telephonic subscriber devices
- H04M2250/12—Details of telephonic subscriber devices including a sensor for measuring a physical value, e.g. temperature or motion
Definitions
- the present invention relates to a wireless communication device, an impedance adjustment method, a housing position detection method, and an information display method.
- Patent Document 1 discloses a mobile phone that can displace two cases between three stable states by providing a hinge mechanism that rotates and slides an attachment shaft with respect to a bifurcated groove. Are listed. Specifically, the crossing angle between the longitudinal directions of the two casings can be displaced to three of 0 degree (closed state), 90 degrees (T-shaped crossing state), or 180 degrees (open state). It is.
- the base plate having the groove and the movable plate that slides with the mounting shaft with respect to the base plate are formed of metal members. Then, the base plate is fixed to one housing, and the movable plate is fixed to the other housing, whereby the two housings are displaced to a closed state, a crossed state, or an open state.
- Patent Document 2 describes a wireless communication device that combines a folding type and a horizontal rotation type with the short axis direction of two housings as a rotation axis. This device switches between a half-folded closed state and a vertically long open state by a folding operation, and further performs horizontal rotation in the open state to bring the casings into a T-shaped crossing state.
- the housing generally includes various conductors such as a metal member of the hinge mechanism as described above, a metal plate (insert metal plate) embedded in a resin material by insert molding, or a conductor layer in various circuit boards. Is.
- an insert sheet metal is often provided around the hinge mechanism from the viewpoint of securing rigidity and strength.
- the hinge mechanism at any displacement position resonates at the communication frequency of the wireless communication device.
- the resonance frequency and the communication frequency may be close to each other by changing the relative position between the hinge mechanism and the insert metal plate or between the insert metal plates of each housing.
- the antenna characteristics of the antenna element may change and adversely affect communication quality.
- the present invention has been made in view of the above-described problems, and can reduce the adverse effect on the antenna characteristics of the antenna element when a plurality of casings that are rotationally displaced with respect to each other around the plane perpendicular axis are relatively displaced. Provide technology.
- the wireless communication device of the present invention includes a first housing including a first conductor and a conductor element connected to the first conductor, a second housing including a second conductor, the first housing, and the second housing. And a coupling mechanism that couples the casings to each other around a surface perpendicular axis so as to be capable of rotational displacement, and the first casing and the second casing are rotationally displaced from each other, so that at least in the second conductor Switching between a first state in which the predetermined region and the conductor element are in an opposing position and the conductor element and the second conductor are conducted at a predetermined frequency, and a second state in which the conduction state is different from the first state. It is characterized by being able to.
- the impedance adjusting method of the present invention includes a first housing including a first conductor and a conductor element connected to the first conductor, a second housing including a second conductor, the first housing, and the first housing.
- a coupling mechanism that couples two housings to each other so as to be rotationally displaceable around a plane axis, wherein the first housing and the second housing rotate. Displacement and transition between an open state and a closed state, and in the open state or the closed state, the conductor element that is opposed to the second conductor at a predetermined interval is resonated at a communication frequency of the wireless communication device.
- the impedance of the wireless communication device at the communication frequency is reduced.
- the various components of the present invention do not have to be individually independent, that a plurality of components are formed as one member, and one component is formed of a plurality of members. It may be that a certain component is a part of another component, a part of a certain component overlaps a part of another component, and the like.
- the wireless communication device and the impedance adjustment method of the present invention it is possible to reduce adverse effects on the antenna characteristics of the antenna element when a plurality of housings are relatively displaced.
- FIG. 1A is a schematic diagram illustrating a first state of the wireless communication device according to the first embodiment.
- FIG. 1B is a schematic diagram illustrating a second state of the wireless communication device. It is a figure which shows the equivalent circuit schematic of the radio
- FIG. 3A is a schematic plan view illustrating a closed state of the wireless communication device according to the second embodiment.
- FIG. 3B is a schematic plan view showing a state in which the closed second housing is rotated approximately 45 degrees counterclockwise with respect to the first housing.
- FIG. 3C is a schematic plan view illustrating an intersecting state of the wireless communication devices.
- FIG. 3A is a schematic plan view illustrating a first state of the wireless communication device according to the first embodiment.
- FIG. 1B is a schematic diagram illustrating a second state of the wireless communication device. It is a figure which shows the equivalent circuit schematic of the radio
- FIG. 3A is a schematic plan view illustrating a
- FIG. 3D is a schematic plan view showing a state where the second housing in the intersecting state is further rotated approximately 45 degrees counterclockwise with respect to the first housing.
- FIG. 3E is a schematic plan view illustrating an open state of the wireless communication device.
- FIG. 4A is a schematic plan view illustrating a closed state of the wireless communication device according to the third embodiment.
- FIG. 4B is a schematic plan view illustrating an open state of the wireless communication device.
- 5A is a cross-sectional view taken along the line IIa-IIa in FIG. 4A.
- 5B is a cross-sectional view taken along the line IIb-IIb in FIG. 4B. It is a figure which shows the equivalent circuit schematic of the radio
- FIG. 7A is a schematic plan view illustrating a first transition state of the wireless communication apparatus according to the fourth embodiment.
- FIG. 7B is a schematic plan view illustrating an intersecting state of the wireless communication devices.
- FIG. 7C is a schematic plan view illustrating a second transition state of the wireless communication device. It is the VV sectional view taken on the line of FIG. 7B.
- FIG. 9A is a perspective view for explaining a first modification of the unit cell.
- FIG. 9B is a plan view of the facing portion.
- FIG. 9C is an explanatory diagram of an equivalent circuit of a unit cell.
- FIG. 10A is a perspective view for explaining a second modification of the unit cell.
- FIG. 10B is a perspective view for explaining a third modification of the unit cell.
- FIG. 11A is a perspective view for explaining a fourth modification of the unit cell.
- FIG. 11B is an explanatory diagram of an equivalent circuit of a unit cell.
- FIG. 12A is a perspective view for explaining a fifth modification of the unit cell.
- FIG. 12B is an explanatory diagram of an equivalent circuit of a unit cell.
- FIG. 1A and 1B are schematic longitudinal sectional views of the wireless communication device 100 according to the present embodiment cut in the thickness direction.
- 1A shows a first state of the wireless communication apparatus 100
- FIG. 1B is a schematic view showing a second state of the wireless communication apparatus 100.
- the wireless communication device 100 includes a first housing 10, a second housing 20, and a coupling mechanism 60 that couples the first housing 10 and the second housing 20 to each other so as to be rotationally displaceable about a plane perpendicular axis. It is equipped with. And the 1st housing
- the first housing 10 includes a first conductor 15 (first circuit board 14) and a conductor element 36a connected to the first conductor 15 (first circuit board 14).
- the second housing 20 includes a second conductor 25. In the first state (see FIG.
- the second state is a state where the conduction state is different from the first state.
- the predetermined region (opposing region 241) and the conductor element 36a are in a non-facing position.
- the wireless communication device 100 of this embodiment will be described in detail.
- the vertical direction on the paper surface corresponding to the direction of the operation key 12 of the first housing 10 is defined as the front-rear direction
- the horizontal direction on the paper surface corresponding to the longitudinal direction of the wireless communication device 100 is defined. It is defined as the vertical direction.
- this is a direction defined for the sake of convenience in order to explain the relative relationship between the components, and does not limit the direction when the wireless communication device 100 is manufactured or used.
- the wireless communication device 100 is, for example, a mobile phone.
- the first housing 10 of the present embodiment is an operation-side housing that a user grips with a hand and operates a key, and is provided with an operation key 12, a first circuit board 14, and a power source (not shown).
- the operation key 12 is an input interface through which a user performs an input operation with a finger or the like.
- the first casing 10 is provided with an antenna element 40 that transmits and receives radio waves of a predetermined communication frequency.
- the antenna element 40 may be provided in the second housing 20, may be provided in the coupling mechanism (hinge mechanism) 60, or may be provided across these.
- the second casing 20 of the present embodiment is a display-side casing that includes a display panel 22 and a second circuit board 24.
- the display panel 22 is a display that performs various display outputs.
- the second circuit board 24 receives a signal from the first circuit board 14 through a wiring (not shown) inserted through the coupling mechanism 60 and controls the display panel 22.
- a second conductor element 36b described later is connected to the second circuit board 24.
- the second conductor 25 provided in the second housing 20 is composed of the second circuit board 24 and the second conductor element 36b.
- the casing provided with the conductor element 36a is referred to as the first casing 10. Therefore, when the conductor element 36 a is provided in the display-side casing, the display-side casing corresponds to the first casing 10.
- the wireless communication device 100 includes a first housing 10 and a second housing 20, and a connection mechanism 60 that connects the first housing 10 and the second housing 20, an antenna, and other components are It is assumed that either the first casing 10 or the second casing 20 is included.
- the wireless communication device 100 may have a plurality of operating frequencies. Examples of the operating frequency include the clock frequency of the elements mounted on the first circuit board 14 and the second circuit board 24 and the communication frequency of the antenna element 40.
- Examples of the communication frequency of the antenna element 40 include a frequency band of a positioning system and a digital television, in addition to a call or communication frequency band of a mobile phone or a wireless communication system. Specific examples include a 800 MHz band, a 1.5 GHz band, and a 2 GHz band for a mobile communication system, and a 2.4 GHz band and a 5 GHz band for a wireless LAN (Local Area Network).
- the connecting mechanism 60 includes a member that connects the first housing 10 and the second housing 20 so as to be capable of rotational displacement.
- a laterally rotating hinge that couples the first housing 10 and the second housing 20 so as to be rotatable around a plane perpendicular axis is exemplified.
- the surface perpendicular axis here refers to the normal direction of either the first housing 10 or the second housing 20.
- the wireless communication device 100 of the present embodiment a case where the first housing 10 and the second housing 20 are parallel to each other and the plane perpendicular axes coincide is illustrated.
- the hinge is not limited to a hinge-type opening / closing operation, and includes a slide type that relatively slides the first housing 10 and the second housing 20.
- the connecting mechanism 60 may be formed by forming the first casing 10 and the second casing 20 in a concave / convex shape that can be fitted to each other, or a hinge mechanism that is created separately from the casing. What was assembled in the housing
- casing may be used.
- the method includes a first housing 10 including a first conductor 15 (first circuit board 14) and a conductor element 36a connected to the first conductor 15, and a second conductor 25 (second circuit board 24 and second circuit board 24).
- a wireless communication device comprising: a second housing 20 including a conductor element 36b); and a coupling mechanism 60 that couples the first housing 10 and the second housing 20 to each other so as to be rotatable and displaceable about a plane perpendicular axis.
- the present invention relates to a method for reducing the impedance of 100.
- the first housing 10 and the second housing 20 are rotationally displaced to make a transition between an open state and a closed state, and in the open state or the closed state, the second conductor 25 is not interposed.
- the impedance of the wireless communication device 100 at the communication frequency is reduced by resonating the conductor element 36a facing each other at a predetermined interval with the communication frequency of the wireless communication device 100.
- the wireless communication apparatus 100 when the wireless communication apparatus 100 is in the open state (FIG. 1A), the first state in which the facing region 241 of the second conductor 25 and the conductor element 36a face each other is taken. And in the closed state (FIG. 1B) of the radio
- FIG. 2 is a diagram showing an equivalent circuit diagram of the wireless communication device 100 in the open state (first state).
- the conductor element 36a and the second conductor 25 constitute a so-called right-handed electromagnetic band-gap (EBG) structure.
- ESG electromagnetic band-gap
- the right-handed metamaterial refers to an artificial material having both positive dielectric constant and magnetic permeability and positive refractive index.
- the unit cell 50 having an EBG structure includes at least a pair of conductor planes parallel to each other and a conductor element 36a electrically connected to one of the conductor planes.
- the first conductor 15 to which the conductor element 36a is connected and the second conductor 25 facing the conductor element 36a respectively correspond to the conductor plane.
- the first conductor 15 is a planar conductor existing in the casing (first casing 10) on the same side as the conductor element 36a.
- the planar shape here includes a planar shape and a curved surface shape.
- the conductor layer of the first circuit board 14 is exemplified as the first conductor 15, but is not limited thereto.
- the first conductor 15 may be a base plate or a movable plate constituting the coupling mechanism 60, or an insert sheet metal of the housing.
- the first conductor 15 may be built in the first casing 10, or a part or all of the first conductor 15 may be exposed from the first casing 10.
- the second conductor 25 is a conductor present in the casing (second casing 20) opposite to the conductor element 36a.
- the second housing 20 includes a conductor plane.
- the second conductor 25 of the present embodiment includes a second conductor element 36b in a predetermined facing region 241 that faces the conductor element 36a in the first state. That is, the second conductor 25 of the present embodiment is configured by the second circuit board 24 and the second conductor element 36b.
- the conductor element 36a provided on the first circuit board 14 is referred to as a first conductor element 36a and is distinguished from the second conductor element 36b.
- a base plate or a movable plate constituting the coupling mechanism 60, or an insert sheet metal of the housing can be used as the conductor plane included in the second conductor 25, in addition to the second circuit board 24, a base plate or a movable plate constituting the coupling mechanism 60, or an insert sheet metal of the housing can be used.
- the present embodiment is a so-called mushroom type EBG structure
- the unit cell 50 includes a conductor element 36a and a counter area 241 facing the conductor element 36a of the first circuit board 14 and the second circuit board 24.
- the flat opposing portion 361 in the conductor element 36a corresponds to the head portion of the mushroom
- the connection member 362 corresponds to the inductance portion of the mushroom.
- the second circuit board 24 corresponds to the upper conductor plane
- the first circuit board 14 corresponds to the lower conductor plane.
- the conductor element 36a may be formed in a different layer from the conductor plane as in this embodiment, or may be formed in the same layer.
- the first conductor element 36a and the second conductor element 36b are opposed to each other when viewed from the direction perpendicular to the surface (normal direction) of at least one of the first circuit board 14 and the second circuit board 24. It means that part or all of one conductor element 36a and second conductor element 36b overlap each other.
- the second conductor element 36b of the present embodiment is a mushroom type, and includes a flat plate-like facing portion 365 corresponding to the head portion and a connection member 366 corresponding to the inductance portion. .
- the connection member 366 is connected to the second circuit board 24.
- the first conductor element 36a and the second conductor element 36b protrude to the inside of the first conductor 15 (first circuit board 14) and the second conductor 25 (second circuit board 24) that face each other in the first state. Is provided. Thereby, the space
- the planar first conductor 15 (first circuit board 14), the first conductor element 36a, and the second conductor 25 constitute at least a part of the metamaterial.
- This metamaterial electrically connects the first conductor element 36a in the first state and the second conductor (second circuit board 24) at the communication frequency of the wireless communication device 100.
- the first material element 36a, the second conductor element 36b, and the first circuit board 14 and the second circuit board 24 belonging to the facing region 241 constitute a metamaterial unit cell 50.
- the first conductor element 36a and the second conductor element 36b in the first state are physically separated from each other with a predetermined interval, but are short-circuited with respect to the electromagnetic wave of the communication frequency. .
- connection members 362 and 366 function as the inductance L of the unit cell 50. Further, the facing portions 361 and 365 function as the first capacitance C1 of the unit cell 50. The first circuit board 14 and the second circuit board 24 function as the second capacitance C2 of the unit cell 50.
- the third opposing conductors 361 are adjacent to each other. Capacitance is formed. The same applies to the second conductor element 36b. In FIG. 2, the inductance and capacitance formed by the coupling mechanism 60 are omitted.
- the unit cell 50 does not include the communication frequency of the wireless communication device 100 in the bandgap frequency, and with respect to electromagnetic waves of the frequency.
- the first circuit board 14 and the second circuit board 24 are brought into conduction.
- the first circuit board 14 and the second circuit board 24 can be regarded as one conductor at the communication frequency of the wireless communication device 100.
- the radio wave emitted from the antenna element 40 is prevented from being out of phase between the first circuit board 14 and the second circuit board 24, and adverse effects on the antenna characteristics of the antenna element 40 are reduced.
- the metamaterial unit cell 50 is one, the first circuit board 14 and the second circuit board 24 can be short-circuited. However, it is preferable to arrange a plurality of unit cells 50 repeatedly because the above effect is increased.
- the arrangement pattern when the plurality of unit cells 50 are repeatedly arranged is not limited, but is preferably arranged periodically, for example.
- the interval (distance between the centers) of the connection members 362 is the wavelength ⁇ of the electromagnetic wave at the communication frequency (if any). It is preferable to make it within 1/2.
- “repetition” includes a case where a part of the configuration is missing in any unit cell 50.
- “repetition” includes a case where the unit cell 50 is partially missing.
- “periodic” includes a case where some of the constituent elements are deviated in some unit cells 50 and a case where the arrangement of some unit cells 50 themselves is deviated.
- the periodicity in the strict sense collapses if the unit cells 50 are repeatedly arranged, the characteristics as a metamaterial can be obtained, so that “periodicity” has a certain amount of defects. Permissible. The cause of these defects includes manufacturing reasons when wiring, vias, and connecting members 362 and 366 are passed between the unit cells 50. In addition, when adding a metamaterial structure to an existing wiring layout or inter-board connection structure, if unit cells cannot be placed due to existing vias, patterns, or connecting members, or manufacturing errors, existing vias, patterns, or connecting members Is used as a part of the unit cell.
- the second conductor element 36b is illustrated as a mushroom type like the first conductor element 36a, but the present invention is not limited to this.
- the opposing parts 361 and 365 of this embodiment are formed in the substantially same shape and the substantially same dimension, it is not necessarily restricted to this.
- the impedance value of the wireless communication device 100 may vary. Specifically, in the open state in which the first housing 10 and the second housing 20 extend in a straight line in opposite directions, the impedance values of the first housing 10 and the second housing 20 are larger than those in the closed state. Generally larger.
- the impedance value means a value when the first conductor element 36a is excluded.
- the impedance value of the first conductor 15 and the second conductor 25 in the first state is larger than the impedance value in the second state.
- the impedance value of the wireless communication device 100 for the communication frequency is reduced, and the first state and The difference in impedance value between the second state and the second state is reduced.
- the antenna element 40 is disposed on the upper end side of the connection mechanism 60 in the first housing 10. Therefore, as shown in FIG. 1A, the second conductor of the second housing 20 is in an open state in which the longitudinal directions of the first housing 10 and the second housing 20 are opposite to each other with the coupling mechanism 60 as the center. 25 (second circuit board 24) faces the antenna element 40, and the influence on the antenna characteristics becomes significant. In other words, the facing area of the second conductor 25 with respect to the antenna element 40 is larger in the open state than in the closed state.
- the term “a conductor is directly facing the antenna element 40” means that a perpendicular line extending from the antenna element 40 to the conductor intersects the conductor. Further, the area of the conductor facing the antenna element 40 is a size corresponding to the viewing angle when the entire conductor is viewed from the antenna element 40.
- the EBG structure including the first conductor element 36a and the second conductor element 36b short-circuits the electromagnetic wave of the communication frequency, so that the first conductor 15 and the second conductor 15 in the open state and the closed state
- the impedance value with the conductor 25 is equalized. Thereby, the communication quality by the antenna element 40 is stabilized.
- the first conductor element 36a and the second conductor element 36b are provided so as to protrude from the first circuit board 14 and the second circuit board 24 in the direction perpendicular to the surface, respectively.
- the surface perpendicular distance between the first conductor element 36a and the second conductor 25 (that is, the second conductor element 36b) is a desired facing distance.
- the first housing 10 and the second housing 20 are relatively displaced and the first conductor element 36a is separated from the facing region 241 (second conductor element 36b), the first conductor element 36a and the second conductor element 36a are separated from each other. The distance between the conductor 25 and the conductor 25 increases.
- the second capacitance C2 formed between the first conductor element 36a and the second conductor 25 takes a desired value only when the first conductor element 36a exists in the facing region 241. For this reason, the electromagnetic wave of the specific communication frequency of the wireless communication apparatus 100 is conducted between the first circuit board 14 and the second circuit board 24 in the open state, and is not conducted in the closed state.
- the first and second conductor elements 36a and 36b are illustrated so as to protrude inside the first conductor 15 and the second conductor 25, but the present invention is not limited thereto. Absent. At least one of the first conductor element 36 a or the second conductor element 36 b may be provided in the same layer as the first conductor 15 or the second conductor 25. Furthermore, both the first conductor element 36a and the second conductor element 36b may be provided in the same layer as the first conductor 15 and the second conductor 25, respectively.
- the second conductor element 36b in the second conductor 25 constituted by the second circuit board 24 and the second conductor element 36b, the second conductor element 36b is provided in the same layer as the second conductor 25. Means that at least part of the second conductor element 36b and the second circuit board 24 overlap each other in the thickness direction.
- all of the plurality of conductor elements may be provided in the same layer as the conductor. Thereby, the dimension of the conductor in the thickness direction can be suppressed, and the wireless communication device 100 can be thinned as a whole.
- a member existing on the surface of the casing such as an insert sheet metal (metal shell) or a coupling mechanism 60 constituting the outer shell of the first casing 10 or the second casing 20, is referred to as the first conductor 15 or the second conductor 25. Also in this case, since the conductor element does not protrude outside from the housing, the operation of the coupling mechanism 60 is not impaired.
- the first conductor element 36a is formed in the same layer as the first conductor 15 (conductor plane) will be described later with reference to FIGS. 10B and 11.
- the opposing portion 365 of the second conductor element 36b is locally island-shaped with respect to the conductor layer of the second circuit board 24. It may be provided and surrounded by an insulating material. The conductor layer and the facing portion 365 may be connected to each other by a linear connecting member in the same layer.
- the second conductor element 36b is disposed in the same layer as the second conductor 25 by locally disposing the second conductor element 36b in the facing region 241 facing the first conductor element 36a in the first state. Also when formed, the first conductor 15 and the second conductor 25 can be made conductive at the communication frequency of the wireless communication apparatus 100.
- connection mechanism 60 of the present embodiment includes at least one of the first conductor 15 and the second conductor 25 and connects the first housing 10 and the second housing 20 so as to be displaceable.
- 3A to 3E are schematic plan views showing the rotation operation of the wireless communication apparatus 100 of the present embodiment.
- the display panel 22 is not shown.
- the connecting mechanism 60 includes a movable plate 61 having a mounting shaft 62 projecting therefrom, and a base plate 63 having a bifurcated groove 64.
- the movable plate 61 is provided in the second housing 20, and the base plate 63 is provided in the first housing 10.
- the movable plate 61 and the base plate 63 are fixed near the end portions of the second casing 20 and the first casing 10, respectively.
- casing 20 are assembled
- the groove portion 64 has two partial arc shapes, and guide pins (not shown) serving as rotation axes of the first housing 10 and the second housing 20 are provided in the vicinity of the respective origins with respect to the arc. .
- the guide pin is fixed to one of the first housing 10 and the second housing 20 and can be engaged and disengaged to the other.
- the movable plate 61 and the base plate 63 are made of the same or different metal materials and are both conductive.
- the first conductor element 36 a is connected to the base plate 63. That is, in the present embodiment, the base plate 63 corresponds to the first conductor 15.
- the movable plate 61 facing the first conductor element 36 a corresponds to the second conductor 25.
- the second conductor element 36b is connected to the movable plate 61 (second conductor 25).
- the first conductor element 36 a and the second conductor element 36 b are provided so as to protrude inside the base plate 63 and the movable plate 61.
- the first conductor element 36a and the second conductor element 36b are provided on the circuit boards (the first circuit board 14 and the second circuit board 24). These conductor elements are different in that they are provided in the coupling mechanism 60.
- the antenna element 40 is disposed on the end side (the upper end side in FIG. 3A) of the base plate 63 in the first housing 10.
- the connecting mechanism 60 has a plurality of stable states corresponding to the first state and the second state, respectively. More specifically, the wireless communication device 100 according to the present embodiment is in a closed state (FIG. 3A) in which the longitudinal directions of the first housing 10 and the second housing 20 are oriented in the same direction with the coupling mechanism 60 as the center. An open state (FIG. 3E) in which the longitudinal directions are opposite to each other and an intersecting state (FIG. 3C) in which the longitudinal directions are substantially orthogonal to each other are provided as stable states.
- FIGA corresponds to the longitudinal direction of the first housing 10 and the second housing 20, and the left-right direction corresponds to the width direction. The same applies to FIGS. 3B to 3E, and illustration of the direction instruction is omitted.
- the first conductor element 36a provided in the first housing 10 and the second conductor element 36b provided in the second housing 20 are in a non-opposing position. That is, the closed state of the present embodiment corresponds to a second state in which the EBG structure is not established.
- the attachment shaft 62 in the closed state shown in FIG. 3A is located at the first end portion 64a of the groove portion 64 (see FIG. 3E).
- the mounting shaft 62 is biased toward the end portion 64a by an elastic member (not shown), and the first housing 10 and the second housing 20 are in the first stable state.
- FIG. 3B shows a state where the closed second housing 20 is rotated approximately 45 degrees counterclockwise with respect to the first housing 10.
- FIG. 3C shows a crossing state in which the mounting shaft 62 reaches the second end portion 64b (see FIG. 3E) of the groove portion 64 and the second housing 20 is substantially orthogonal to the first housing 10. Yes.
- the mounting shaft 62 is urged toward the end portion 64b by an elastic member (not shown), and the first housing 10 and the second housing 20 are in the second stable state.
- the intersecting state the first conductor element 36a and the second conductor element 36b are still in the non-opposing positions. That is, the intersection state of the present embodiment also corresponds to the second state where the EBG structure is not established.
- FIG. 3D shows a state in which the second housing 20 in an intersecting state is further rotated approximately 45 degrees counterclockwise with respect to the first housing 10.
- FIG. 3E shows an open state in which the mounting shaft 62 has reached the third end 64c (see FIG. 3C) of the bifurcated groove 64.
- FIG. 3C shows the mounting shaft 62 is urged toward the end portion 64c by an elastic member (not shown), and the first housing 10 and the second housing 20 are in the third stable state.
- the first conductor element 36a and the second conductor element 36b are in opposing positions.
- an EBG structure including the first conductor element 36 a and the second conductor element 36 b is established, and the electromagnetic wave having the communication frequency of the wireless communication device 100 is conducted between the movable plate 61 and the base plate 63. That is, the open state of this embodiment corresponds to the first state in which the EBG structure is established.
- the equivalent circuit diagram of this EBG structure is common to the first embodiment (see FIG. 2).
- the impedance value of the coupling mechanism 60 when the relative positions of the conductive movable plate 61 and the base plate 63 (the first conductor 15 and the second conductor 25) constituting the coupling mechanism (hinge mechanism) 60 change. Is reduced by the establishment of the EBG structure.
- the relative position between the first conductor 15 and the second conductor 25 refers to their relative translational position and rotation angle.
- this invention is not limited to this. That is, a plurality of conductor elements may be provided on one or both of the first conductor 15 and the second conductor 25, and different sets of conductor elements may be opposed to each other in a plurality of stable states of the wireless communication device 100.
- the first conductor 15 or the second conductor 25 may include a third conductor element.
- the first conductor element 36a or the second conductor element 36b and the third conductor element are It is good also as comprising at least one part of a metamaterial facing.
- inductance L and the second capacitance C2 in the EBG structure respectively established in a plurality of stable states different from each other, a difference in impedance value of the wireless communication device 100 in each stable state is obtained. Further reduction can be achieved.
- other inductance elements or capacitance elements may be connected to any or all of the first to third conductor elements. This makes it possible to make the inductance L and the second capacitance C2 of the EBG structure made of different sets of conductor elements different from each other while improving the moldability by making the first to third conductor elements the same shape.
- the antenna of the antenna element 40 when the first housing 10 and the second housing 20 that are rotationally displaced with respect to each other about the plane perpendicular axis are relatively displaced.
- the adverse effect on the characteristics is reduced.
- the relative position and angle between the case that the user grips with the hand and the other case connected to the case are hereinafter referred to as the case state or the case style.
- various controls are performed according to the state of the housing. For example, the direction of the display information such as characters and images on the display display unit intersects 90 degrees between the case where the casing is in a T-shaped crossing state and the vertically long (I-shaped) open state, Control is performed so that the display information always faces the user.
- the casing style can be detected suitably, and fluctuations in antenna characteristics during rotation of the casing can be suppressed.
- FIGS. 4A and 4B are schematic plan views illustrating the closed state and the open state of the wireless communication device 100 according to the present embodiment, respectively.
- 5A is a cross-sectional view taken along the line IIa-IIa in FIG. 4A
- FIG. 5B is a cross-sectional view taken along the line IIb-IIb in FIG. 4B.
- 5A and 5B are longitudinal sectional views of FIGS. 4A and 4B cut in the thickness direction, respectively.
- the wireless communication apparatus 100 further includes a detection unit 70 that detects a conduction state between the first conductor element 36a and the second conductor 25.
- a detection unit 70 that detects a conduction state between the first conductor element 36a and the second conductor 25.
- the wireless communication device 100 of this embodiment will be described in detail.
- the first housing 10 and the second housing 20 have a substantially rectangular shape in plan view.
- the longitudinal direction in the closed state shown in FIG. 4A is the up-down direction
- the short direction of the first housing 10 is the width direction (left-right direction).
- the front-rear direction of the paper corresponding to the direction perpendicular to the operation key 12 is defined as the front-rear direction of the wireless communication apparatus 100.
- the first housing 10 is provided with a first circuit board 14 connected to the operation key 12 and an antenna element 40 for transmitting and receiving radio waves of a predetermined communication frequency.
- casing 20 is a display side housing
- the display output unit 22 is a display panel such as a liquid crystal display device.
- the display output unit 22 of the present embodiment is provided on substantially the entire front surface of the second housing 20.
- the second housing 20 includes a second circuit board 24 connected to the display output unit 22.
- the display control unit 26 mounted on the second circuit board 24 receives a signal from the first circuit board 14 through a wiring (not shown) inserted through the coupling mechanism 60 and controls the display output unit 22.
- the housing provided with the first conductor element 36a is referred to as the first housing 10. Therefore, when the first conductor element 36 a is provided in the display-side casing, the display-side casing corresponds to the first casing 10.
- the wireless communication device 100 includes a first housing 10 and a second housing 20, and a connection mechanism 60 that connects the first housing 10 and the second housing 20, an antenna, and other components are It is assumed that either the first casing 10 or the second casing 20 is included.
- first circuit board 14 and the second circuit board 24 signals of various operating frequencies of the wireless communication device 100 are transmitted.
- conductor layers to which a constant potential such as a ground potential is applied are provided on substantially the entire surface of each substrate.
- the connection mechanism 60 is a laterally rotating hinge that connects the first housing 10 and the second housing 20 to each other so as to be rotatable around a plane perpendicular axis.
- the connection mechanism 60 of the present embodiment includes a plurality of stable states that respectively correspond to the first state and the second state.
- the first state includes a closed state in which the longitudinal directions of the first housing 10 and the second housing 20 face in the same direction around the coupling mechanism 60 and an open state in which the longitudinal directions face in opposite directions. Or it is provided as either of the second states. More specifically, FIG. 4A and FIG. 5A have shown the 1st state corresponding to the closed state of a housing
- the case that the casing takes a plurality of states (styles) means that the connection state between the first casing 10 and the second casing 20 has a plurality of stable states.
- the connection mechanism 60 of the present embodiment includes a movable plate 61 having a mounting shaft 62 projecting therefrom, and a base plate 63 having a bifurcated groove 64.
- the movable plate 61 and the base plate 63 are made of the same or different metal materials and are both conductive.
- the movable plate 61 is provided in the second housing 20, and the base plate 63 is provided in the first housing 10.
- the movable plate 61 and the base plate 63 are fixed near the end portions of the second casing 20 and the first casing 10, respectively.
- the first housing 10 and the second housing 20 are assembled so as to be displaceable by making the movable plate 61 and the base plate 63 face each other with the mounting shaft 62 inserted into the groove portion 64.
- the mounting shaft 62 is slidably fitted to the groove portion 64.
- the movable plate 61 is electrically connected to the conductor layer (constant potential layer) of the second circuit board 24, and the base plate 63 is electrically connected to the conductor layer (constant potential layer) of the first circuit board 14.
- the bifurcated groove 64 has two partial arcs, and guide pins 66 and 67 serving as rotation axes of the first casing 10 and the second casing 20 are provided in the vicinity of the respective origins with respect to the arc. ing.
- the guide pins 66 and 67 are fixed to one of the first casing 10 or the second casing 20 and can be engaged and disengaged to the other. More specifically, the guide pins 66 and 67 shown in FIGS. 4A and 4B are pivotally supported with respect to the base plate 63 so as to be detachable. As a result, the movable plate 61 and the base plate 63 move relatively by translational movement along the groove portion 64 and rotational movement about one of the two guide pins 66 and 67. 5B, illustration of the movable plate 61, the mounting shaft 62, and the guide pin 66 is omitted for the sake of convenience.
- the mounting shaft 62 in the closed state shown in FIG. 4A is located at the first end portion 64a of the groove portion 64 (see FIG. 4B).
- the mounting shaft 62 is biased toward the end portion 64a by an elastic member (not shown), and the first housing 10 and the second housing 20 are in the first stable state.
- 4B shows an open state in which the second housing 20 is rotated 180 degrees clockwise with respect to the first housing 10 from the closed state of FIG. 4A.
- FIGS. 7A to 7C A specific operation of the second housing 20 using the mounting shaft 62 and the guide pins 66 and 67 will be described later with reference to FIGS. 7A to 7C.
- the first housing 10 includes a first conductor 15 and a first conductor element 36a. These may be built in the first housing 10 or may be partially or entirely exposed to the outside.
- the first conductor 15 is a planar conductor that is present in the casing on the same side as the first conductor element 36a (the first casing 10 in the present embodiment).
- the planar shape includes a planar shape and a curved surface shape.
- the base plate 63 is exemplified as the first conductor 15, but is not limited thereto.
- the ground layer of the first circuit board 14 built in the first housing 10 may be used.
- the metal plate (insert metal plate) embedded in the resin material can also be used as the 1st conductor 15.
- the first conductor 15 of this embodiment includes a second conductor element 36b and a third conductor element 36c in addition to the first conductor element 36a.
- the first to third conductor elements 36 a to 36 c are provided in the same layer as the base plate 63 or in different layers protruding to the front side from the base plate 63.
- the first to third conductor elements 36a to 36c each have a mushroom shape and are provided to protrude from the front surface side of the base plate 63.
- first conductor 15 of the present embodiment may be composed of two or more conductor surfaces.
- the first conductor 15 provided with the first conductor element 36a and the first conductor 15 provided with the second conductor element 36b and the third conductor element 36c may be on the same conductor surface, and Two or more conductor surfaces separated from each other may be used.
- a mode in which the first to third conductor elements 36a to 36c are provided on the common base plate 63 is illustrated.
- the second housing 20 includes a second conductor 25.
- the second conductor 25 is a conductor that faces the first conductor element 36a in at least the first state.
- the ground layer of the second circuit board 24 is exemplified as the second conductor 25.
- the movable plate 61 of the coupling mechanism 60 may be used as the second conductor 25, or the insert metal plate of the second housing 20 may be used. More specifically, as shown in FIGS. 5A and 5B, the second conductor 25 of the present embodiment includes a second circuit board 24 and opposing elements 37a, 37b, and 37c that protrude from the rear surface side. Consists of.
- the movable plate 61 on which the opposing elements 37a, 37b, and 37c are formed is exemplified as the second conductor 25.
- the second conductor 25 may also include a plurality of spaced apart conductor surfaces, and the opposing elements 37a, 37b, and 37c may be provided on different conductor surfaces.
- the present detection method includes a first housing 10 including a first conductor 15 and a first conductor element 36a connected to the first conductor 15, a second housing 20 including a second conductor 25,
- each of the first housing 10 and the second housing 20 is connected to the first housing 10 and the second housing 20 so as to be rotatable and displaceable about a plane perpendicular axis.
- the present invention relates to a method for detecting a relative position. In the first state, as described above, the first conductor element 36a and the second conductor 25 face each other with a predetermined interval, and the first conductor element 36a and the second conductor 25 are electrically connected at a predetermined frequency. It is.
- the second state is a state where the conduction state between the first conductor element 36a and the second conductor 25 is different from the first state.
- this detection method detects the conduction
- the relative position between the first housing 10 and the second housing 20 refers to their relative translational position and rotation angle.
- the wireless communication device 100 in the closed state, has a first element 15a connected to the first element 15 and a counter element 37a formed to protrude to the rear surface side of the second conductor 25.
- the conductor element 36a is opposed to the conductor element 36a with a predetermined interval without passing through another conductor. That is, the opposing element 37a is formed in the partial region (opposing region 241) of the second circuit board 24 facing the first conductor element 36a in the first state.
- Such a state is the first state in the present embodiment.
- the opposing distance between the first conductor element 36a and the second conductor 25 corresponds to the distance between the first conductor element 36a and the opposing element 37a.
- FIG. 6 is a diagram showing an equivalent circuit diagram of the wireless communication device 100 in the open state (first state).
- the movable plate 61 and the guide pin 66 are not shown as appropriate.
- the first conductor element 36a and the second conductor 25 constitute a so-called right-handed electromagnetic band-gap (EBG) structure.
- ESG electromagnetic band-gap
- the unit cell 50 having an EBG structure includes at least a pair of conductor planes parallel to each other and a first conductor element 36a connected to one of the conductor planes.
- the first conductor 15 to which the first conductor element 36a is connected and the second conductor 25 facing the first conductor element 36a correspond to the pair of conductor planes, respectively.
- This embodiment has a so-called mushroom-type EBG structure, and the unit cell 50 faces the first conductor element 36a and the first conductor element 36a of the base plate 63 and the second circuit board 24, respectively. And a counter area 241.
- the flat opposing portion 361 in the first conductor element 36a corresponds to the head portion of the mushroom, and the connection member 362 corresponds to the inductance portion of the mushroom.
- the opposing region 241 in the conductor layer (constant potential layer) of the second circuit board 24 corresponds to the upper conductor plane.
- region 241 in the base board 63 is equivalent to a lower conductor plane.
- the first conductor element 36a may be formed in a different layer from the conductor plane as in the present embodiment, or may be formed in the same layer.
- the first conductor element 36a and the opposing element 37a are opposed to each other when the first conductor element 36a is viewed from at least one of the first conductor 15 and the second conductor 25 in the direction perpendicular to the surface (normal direction). And part or all of the opposing elements 37a overlap each other.
- the opposing element 37a of the present embodiment is a mushroom type like the first conductor element 36a, and includes a flat opposing part 371 corresponding to the head part and a connecting member 372 corresponding to the inductance part.
- the connection member 372 is connected to the second circuit board 24. That is, the opposing element 37a is another conductor element that constitutes the unit cell 50 of the EBG structure together with the first conductor element 36a, the base plate 63 (first conductor 15), and the second circuit board 24.
- the planar first conductor 15 (base plate 63), the first conductor element 36a, and the second conductor 25 constitute at least a part of the metamaterial. More specifically, the first material 15 (base plate 63), the first conductor element 36a, and the second conductor 25 (second circuit board 24 and counter element 37a) constitute a metamaterial.
- This metamaterial electrically connects the first conductor element 36a and the second conductor 25 at a predetermined frequency.
- the first conductor element 36a and the opposing element 37a in the first state are physically separated from each other with a predetermined interval, but are short-circuited with respect to an electromagnetic wave having a predetermined frequency.
- this frequency may be referred to as a short circuit frequency.
- connection members 362 and 372 function as the inductance L of the unit cell 50. Further, the facing portions 361 and 371 function as the first capacitance C1 of the unit cell 50.
- the base plate 63 and the second circuit board 24 function as the second capacitance C2 of the unit cell 50.
- a third capacitance is formed between the adjacent opposing portions 361. Is formed. The same applies to the counter element 37a. When the plurality of counter elements 37a are opposed to the first conductor element 36a, another capacitance is formed between the adjacent counter portions 371.
- the unit cell 50 makes the first conductor 15 and the second conductor 25 conductive to electromagnetic waves having a predetermined short-circuit frequency.
- the detection unit 70 applies an electric current (detection current) having a predetermined short-circuit frequency between the first conductor element 36a and the second conductor 25, and the first conductor element 36a and the second conductor 25. And a current detection unit 74 that detects a current between them.
- the current detection unit 74 detects the current between the first conductor element 36a and the second conductor 25, the first conductor element 36a and the second conductor 25 are electrically connected to each other so that predetermined electrical characteristics are obtained. It means being detected. Specifically, the current detection unit 74 has a function of detecting the magnitude of electrical characteristics such as voltage and impedance between the first conductor element 36a and the second conductor 25 in addition to the function of an ammeter. Circuit or sensor. The current detection unit 74 may be a device that quantitatively measures a predetermined electrical characteristic, or may be a device that detects that a desired electrical characteristic is greater than or less than a threshold value.
- the current detection unit 74 of the detection unit 70 includes the first conductor element 36a and the second conductor 25 (the second circuit board 24 or the opposing element 37a) with respect to the current having a predetermined short-circuit frequency applied by the application unit 72. Whether or not it is conducting or the degree of conduction is detected.
- the application unit 72 is provided on the first circuit board 14 and the current detection unit 74 is provided on the second circuit board 24 exemplarily, but is not limited thereto.
- the short-circuit frequency between the first conductor element 36a and the second conductor 25 is not particularly limited. It may be the clock frequency of the wireless communication device 100, the communication frequency of the antenna element 40, or any frequency for detection by the current detection unit 74.
- the predetermined short-circuit frequency is set as the communication frequency of the antenna element 40 included in the wireless communication device 100. Accordingly, the first circuit board 14, the base plate 63, the movable plate 61, and the second circuit board 24 can be regarded as one conductor at the communication frequency of the wireless communication device 100 (if there are a plurality of them). it can. For this reason, it is prevented that the current noise resulting from the radio wave emitted from the antenna element 40 flows in the opposite phase between the first circuit board 14 and the second circuit board 24, and the adverse effect on the antenna characteristics of the antenna element 40 is reduced. Is done.
- the current detection unit 74 detects current noise from the antenna element 40 to detect the first conductor element 36a and the second conductor 25, more specifically, between the first conductor element 36a and the opposing element 37a. Detect continuity between. Thereby, without applying the detection current by the application unit 72, or the power required for the detection current is extremely reduced, the conduction state between the first conductor element 36a and the second conductor 25 in the first state is changed to the current detection unit. 74 can be detected.
- the unit cell 50 of metamaterial is one, it is possible to short-circuit the 1st conductor 15 and the 2nd conductor 25.
- FIG. it is preferable to arrange a plurality of unit cells 50 repeatedly because the above effect is increased.
- the arrangement pattern when the plurality of unit cells 50 are repeatedly arranged is not limited, but is preferably arranged periodically, for example.
- the opposing element 37a is illustrated as a mushroom type like the first conductor element 36a, but the present invention is not limited to this. Moreover, although it is preferable that the opposing parts 361 and 371 of this embodiment are formed in the substantially same shape and the substantially same dimension, it is not necessarily restricted to this.
- the first conductor element 36 a and the counter element 37 a are not opposed to each other because the second casing 20 is displaced with respect to the first casing 10. That is, a predetermined region (opposing region 241) facing the conductor element 36a in the first state in the second conductor 25 is in a position not facing the conductor element 36a in the second state.
- the opposing elements 37b and 37c are also formed in a region different from the opposing region 241. For this reason, the opposing distance between the first conductor element 36 a and the second conductor 25 corresponds to the distance between the first conductor element 36 a and the second circuit board 24.
- the facing distance between the first conductor element 36a and the second conductor 25 in the open state of the housing is larger than the facing distance in the closed state (first state) of the housing.
- the first conductor element 36a does not constitute the predetermined first capacitance C1 and the second capacitance C2
- the first conductor element 36a and the second conductor 25 are insulated with respect to the short-circuit frequency.
- the conduction state changes from the first state. This open state corresponds to the second state of the housing.
- the current detection unit 74 can know the state (style) of the housing by detecting the electrical characteristics between the first conductor element 36a and the second conductor 25 in the first state and the second state.
- the wireless communication device 100 includes a display output unit 22 and a display control unit 26.
- the display output unit 22 is a display unit that displays output information including characters or images
- the display control unit 26 is a control unit that switches the direction of the output information displayed on the display output unit 22 in a plurality of ways.
- the display control unit 26 according to the present embodiment switches the direction of the output information between the first state and the second state based on the detection result by the detection unit 70.
- the output information is directional information, and by switching the output direction according to the state (style) of the housing, the user's vertical direction and the direction of the output information can always be matched.
- the display output unit 22 in the first state (closed state) shown in FIG. 4A, as an example, the display output unit 22 has the connection mechanism 60 side (hinge side) above FIG. The output information may be displayed and output with the above.
- the 2nd state (open state) shown in Drawing 4B it is good to display-output output information by making the hinge side among display output parts 22 below.
- the wireless communication device 100 of the present embodiment the following information display method (hereinafter sometimes referred to as the present display method) is realized.
- the present display method includes a first housing 10 including a first conductor 15 and a first conductor element 36a connected to the first conductor 15, a second housing 20 including a second conductor 25,
- the wireless communication device 100 which includes a connection mechanism 60 that connects the one housing 10 and the second housing 20 so as to be capable of rotational displacement with respect to each other about a plane perpendicular axis, either the first housing 10 or the second housing 20
- the present invention relates to a method of displaying output information in a display output unit 22 provided in the above. In this display method, the detection step performed in each of the first state and the second state, and the display for switching the direction of the output information displayed on the display output unit 22 between the first state and the second state based on the detected result Steps.
- the relative position between the first housing 10 and the second housing 20 is either the first state or the second state. Is detected.
- the first state as described above, the first conductor element 36a and the second conductor 25 face each other with a predetermined interval, and the first conductor element 36a and the second conductor 25 are electrically connected at a predetermined frequency. It is.
- the second state is a state where the conduction state between the first conductor element 36a and the second conductor 25 is different from the first state.
- the display control unit 26 switches the direction of the output information displayed on the display output unit 22.
- the display control unit 26 switches the direction of the output information when the direction of the output information is changed between the first state and the second state, from the first state to the second state, or the second state. This includes the case where the direction of the output information is changed only when the casing changes from the state to the first state. That is, in the display step of this display method, the display control unit 26 displays the output information in different directions in the first state and the second state based on the result detected by the current detection unit 74.
- the casing has two styles of the closed state and the open state has been described as an example, but the present invention is not limited to this.
- the housing may take three or more styles. Hereinafter, this will be described in the fourth embodiment.
- the longitudinal directions of the first housing 10 and the second housing 20 are substantially the same with the coupling mechanism 60 as the center. It has an orthogonal crossing state as a third state.
- FIG. 7A, 7B, and 7C are schematic plan views of the wireless communication device 100 according to the present embodiment.
- FIG. 7B shows the crossed state of the housing.
- 7A shows the first transition state in the middle of the transition from the closed state (FIG. 4A) to the cross state
- FIG. 7C shows the second transition state in the middle of the transition from the cross state to the open state (FIG. 4B).
- Yes. 8 is a cross-sectional view taken along line VV in FIG. 7B, and corresponds to a vertical cross-sectional view of FIG. 7B cut in the thickness direction.
- the third state is a state in which the conductive state between the first conductor element 36a and the second conductor 25 is different from the first state and the second state.
- the coupling mechanism 60 further includes another stable state corresponding to the third state.
- the state where the second housing 20 is rotated approximately 45 degrees clockwise relative to the first housing 10 from the closed state of FIG. 4A is the first transition state of FIG. 7B.
- the first housing 10 and the second housing 20 rotate around the guide pin 66, and the mounting shaft 62 slides along the groove 64. .
- the movable plate 61 and the base plate 63 rotate around the guide pin 66 while keeping parallel to each other.
- the first conductor element 36a and the opposing element 37a are separated from each other, and the first to third conductor elements 36a to 36c and the opposing elements 37a to 37c do not face each other.
- the attachment shaft 62 reaches the second end portion 64b (see FIG. 4A) of the groove portion 64, and the second housing 20 is substantially orthogonal to the first housing 10.
- the mounting shaft 62 is urged toward the end portion 64b by an elastic member (not shown), and the first housing 10 and the second housing 20 are in a stable state.
- the first conductor element 36a and the opposing element 37b, and the third conductor element 36c and the opposing element 37c are in opposing positions. That is, in the intersecting state of the present embodiment, the unit cell 50 having the EBG structure including the third conductor element 36c is established. In the intersecting state, the unit cell 50 having the EBG structure including the first conductor element 36a is also established at the same time, but this is optional.
- the establishment of the EBG structure means that a predetermined electromagnetic band gap is generated.
- the state where the second housing 20 is rotated approximately 45 degrees clockwise relative to the first housing 10 from the intersecting state of FIG. 7B is the second transition state of FIG. 7C.
- the second housing 20 rotates around the first housing 10 around the guide pin 67, and the mounting shaft 62 extends from the end portion 64b to the end portion 64c (see FIG. 4A) along the groove portion 64. Slide.
- an elastic member (not shown) urges the attachment shaft 62 toward the end portion 64c, and the housing is stabilized in the open state.
- the second conductor element 36b and the opposing element 37a are opposed to each other to form the unit cell 50 having the EBG structure (see FIG. 5B).
- the first conductor element 36a, the first conductor 15, and the second conductor 25 constitute at least a part of the metamaterial.
- the second conductor element 36b, the first conductor 15 and the second conductor 25 constitute at least a part of the metamaterial.
- These metamaterials include the first conductor 15 and the second conductor 25 at a predetermined frequency in at least one of the second state (open state) and the third state (crossed state) in addition to the first state (closed state). And electrically connect.
- the opposing elements 37a to 37c protrude into a region facing the first conductor element 36a in the first state and a region facing the second conductor element 36b in the second state or the third state, respectively. It is another conductor element provided.
- the second conductor element 36b constitutes a metamaterial in the second state (open state)
- the third conductor element 36c constitutes a metamaterial in the third state (crossing state).
- the detection part 70 can judge that a housing
- the detection part 70 detects conduction
- the detection part 70 can judge that a housing
- electrical_connection with the 3rd conductor element 36c and the opposing element 37c the detection part 70 can judge that a housing
- the wireless communication device 100 of the present embodiment further includes the third conductor element 36c connected to the first conductor 15 or the second conductor 25, and in the first state, the second state, and the third state,
- One or more different elements among the first conductor element 36a, the second conductor element 36b, and the third conductor element 36c constitute a metamaterial.
- one or more conductor elements different in the first to third states constitute a metamaterial means that a combination of opposing pairs of the first to third conductor elements 36a to 36c and the opposing elements 37a to 37c, It means that they are not completely identical in any two or more of the first to third states. For example, when the pair of the first conductor element 36a and the facing element 37a faces in two states, it is necessary that the two states can be distinguished from each other by facing the other pair simultaneously.
- the current detection unit 74 can identify the three styles of the casing by detecting the detection current of the short-circuit frequency with respect to the unit cell 50 having the EBG structure established in the first to third states.
- the housing style is 4 or more, and conductor elements are provided in one or both of the first housing 10 and the second housing 20 so that the EBG structure formed in each state or a combination thereof is not completely the same. May be arranged.
- the second conductor element 36b connected to either the first conductor 15 or the second conductor 25 (the first conductor 15 in the present embodiment) is further provided.
- the second conductor element 36b and either the first conductor 15 or the second conductor 25 (the second conductor 25 in the present embodiment) face each other at a predetermined frequency.
- the first conductor 15 and the second conductor 25 are electrically connected.
- a total of four housing styles are identified. be able to.
- by further including the third conductor element 36c various styles of the housing can be detected, and the detection reliability can be improved.
- the current detection unit 74 may be individually provided for the first to third conductor elements 36a to 36c.
- the first conductor 15 to which the first to third conductor elements 36a to 36c are connected may be a different conductor plane.
- both the short-circuit frequency applied to the metamaterial formed by the first conductor 15 in the first state and the short-circuit frequency applied to the metamaterial formed by the second conductor 25 in the second state or the third state are both wireless communication devices 100. May be the communication frequency of the antenna element 40 included.
- the short-circuit frequency conducted by the metamaterial established in each state is the communication frequency, as described above, the state of the housing is obtained by detecting that the current noise caused by the antenna element 40 conducts the conductor element. be able to.
- these short-circuit frequencies may be common or may be different from each other.
- the first conductor element 36a, the second conductor element 36b, and the third conductor element 36c are three different ones in at least one of the first conductor 15 and the second conductor 25 (first conductor 15 in the present embodiment). Arranged in the area.
- the first conductor element 36a and the second conductor element 36b are provided so as to protrude inwardly facing each other in the first conductor 15 or the second conductor 25 (first conductor 15 in the present embodiment).
- the third conductor element 36c is also provided so as to protrude inwardly in the first conductor 15 or the second conductor 25, respectively.
- the electroconductive opposing element 37a is provided in the predetermined area
- the first conductor element 36 a and the opposing element 37 a are provided so as to protrude inwardly facing each other in the first conductor 15 and the second conductor 25.
- the EBG structure is formed only in the stable state in which any one of the first to third conductor elements 36a to 36c and the opposing elements 37a to 37c face each other, and in the transition state of the housing (FIGS. 7A and 7C).
- the EBG structure is not established. Thereby, the detection part 70 can know the transition state of a housing
- At least one of the first conductor element 36a or the opposing element 37a may be provided in the same layer as the first conductor 15 or the second conductor 25.
- the opposing elements 37a to 37c are provided in the same layer as the second conductor 25. It means that at least a part of each of 37a to 37c and the second circuit board 24 overlaps each other in the thickness direction.
- all the conductor elements or opposing elements provided on the first conductor 15 or the second conductor 25 may be provided in the same layer as the conductor. Thereby, the dimension of the conductor in the thickness direction can be suppressed, and the wireless communication device 100 can be thinned as a whole.
- a member existing on the surface of the casing such as an insert sheet metal (metal shell) or a coupling mechanism 60 constituting the outer shell of the first casing 10 or the second casing 20, is referred to as the first conductor 15 or the second conductor 25. Even in this case, since the conductor element and the opposing element do not protrude outside from the housing, the operation of the coupling mechanism 60 is not impaired.
- the conductor elements 36a to 36c are formed in the same layer as the first conductor 15 (conductor plane) will be described later with reference to FIGS. 10B, 11A, and 11B.
- the opposing elements 37a to 37c are formed in the same layer as the second conductor 25, the opposing portion 371 is locally provided in an island shape with respect to the conductor layer of the second circuit board 24, and the periphery thereof is insulated. It is good to go with a material.
- the conductor layer and the facing portion 371 may be connected to each other by a linear connecting member in the same layer.
- the opposing elements 37a to 37c are locally arranged at positions facing one of the conductor elements 36a to 36c in the first state to the third state, so that the opposing elements 37a to 37c are connected to the second conductor 25. Even when formed in the same layer, the state (style) of the housing can be detected.
- the style of the housing can be detected without using a permanent magnet. For this reason, there are no restrictions on the placement of electronic components that are generally susceptible to magnetism in the wireless communication device 100. Therefore, it is possible to reduce the size of the wireless communication device 100 and complicate the operation of the hinge mechanism.
- the impedance value of the wireless communication device 100 may vary. Specifically, compared to the closed state (FIG. 4A) in which the first housing 10 and the second housing 20 overlap each other, the open state (FIG. 4B) in which these extend in a straight line in the opposite direction, or substantially orthogonal In the crossed state (FIG. 7B), the impedance values of the first housing 10 and the second housing 20 may increase.
- the impedance values of the first casing 10 and the second casing 20 are different from each other in the first to third states with respect to the electromagnetic wave having a predetermined short-circuit frequency.
- the impedance value here means a value when the first to third conductor elements 36a to 36c are excluded.
- an EBG structure is formed by at least one of the first conductor element 36a, the second conductor element 36b, and the third conductor element 36c.
- the impedance values of the first housing 10 and the second housing 20 with respect to the communication frequency of the wireless communication device 100 are different between the first state and the second state (and the third state).
- the conductor element 36a that is opposed to the second conductor 25 at a predetermined interval in the open state or the closed state (or the crossed state) resonates at the communication frequency of the wireless communication device 100.
- an impedance adjustment method for reducing the impedance of the wireless communication device 100 at the communication frequency is provided.
- the amount of change in the impedance value of the coupling mechanism 60 due to the displacement of the first housing 10 and the second housing 20 between the closed state, the crossing state, and the open state. Can be reduced by an EBG structure that is alternatively established in the open state.
- a so-called mushroom-type conductor element 36a shown in FIGS. 1A, 1B, 2, and 6 is provided with a flat plate-like facing portion 361 provided in a layer different from that of the first conductor 15, and standing on this. And a columnar connecting member 362.
- Such an EBG structure may be referred to as a patch type.
- a microstrip line provided with a linear transmission line can be used instead of the patch type.
- an open stub structure is adopted in which one end of the microstrip line is connected to the first conductor 15 and the other end is an open end.
- an EBG structure may be referred to as an open stub type.
- the facing portion 361 may be formed in the same layer as the first conductor 15 in an island shape, or the facing portion 361 may be formed in a different layer from the first conductor 15 as in the above embodiment. May be.
- a linear element for increasing inductance may be added to the facing portion 361 or the connection member 362.
- the EBG structure of this embodiment is allowed to slide between layers within the unit cell 50.
- FIG. 9A is a perspective view for explaining a first modification of the unit cell 50
- FIG. 9B is a plan view of the facing portion 361 shown in FIG. 9A.
- the unit cell 50 is different from the conductor element 36a shown in FIG. 2 in that the facing portion 361 is separated into a first conductor piece 3611 and a second conductor piece 3612.
- the first conductor piece 3611 and the second conductor piece 3612 are patches formed in the same layer.
- a rectangular first conductor piece 3611 is provided in an island shape inside the opening 363 of the second conductor piece 3612 formed in a rectangular frame shape.
- the first conductor piece 3611 and the second conductor piece 3612 are connected by a wiring 3613 provided in the same layer as these.
- the width dimension of the wiring 3613 (the vertical dimension in FIG. 9B) is smaller than the dimension of the first conductor piece 3611.
- the connecting member 362 is connected to the first conductor piece 3611.
- FIG. 9C is an explanatory diagram of an equivalent circuit of the unit cell 50 shown in FIG. 9A.
- the connection member 362 functions as a first inductance element of the unit cell 50.
- the first conductor piece 3611 and the second conductor 25 function as a first capacitance
- the first conductor 15 and the second conductor 25 function as a second capacitance of the unit cell 50.
- FIG. 9A when the unit cells 50 are arranged adjacent to each other, a third capacitance is formed between the adjacent facing portions 361 (not shown in FIG. 9C).
- the second conductor piece 3612 and the second conductor 25 function as a fourth capacitance of the unit cell 50.
- the wiring 3613 functions as a second inductance element. This inductance element is provided in series with the fourth capacitance.
- the second inductance element and the fourth capacitance are in parallel with the first capacitance (first conductor piece 3611).
- FIG. 10A is a perspective view for explaining a second modification of the unit cell 50.
- the unit cell 50 has an opening 363 formed in a region facing the facing portion 361 in the first conductor 15, and the connection member 362 and the first conductor 15 are connected by a wiring 3621 in FIG. This is different from the conductor element 36a shown in FIG.
- the lower end position of the connection member 362 shown in FIG. 10A, that is, the position of the connection member 362 in the layer of the first conductor 15 is located inside the opening 363.
- the size of the opening 363 and the facing portion 361 is not particularly limited.
- the facing portion 361 is made larger than the opening 363, and the facing portion 361 includes the opening 363 when the first conductor 15 is viewed in the direction perpendicular to the plane.
- the equivalent circuit of the unit cell 50 of the second modification shown in FIG. 10A is almost the same as that of FIG. Specifically, the wiring 3621 functions as an inductance element of the unit cell 50 together with the connection member 362. That is, in this modification, the inductance value of the unit cell 50 can be increased by providing the opening 363 and the wiring 3621.
- FIG. 10B is a perspective view for explaining a third modification of the unit cell 50.
- the unit cell 50 in the present modification is different from the second modification in that the facing portion 361 is formed in the opening 363 so as to be separated in an island shape. That is, the facing portion 361 of this modification is provided in the same layer as the first conductor 15 and is connected to the first conductor 15 by the wiring 3621 having a narrower width than this.
- the equivalent circuit of the unit cell 50 of the third modification is almost the same as that shown in FIG. Specifically, the wiring 3621 functions as an inductance element of the unit cell 50 instead of the connection member 362.
- the conductor element 36 a (opposing portion 361) of this modification is formed in the same layer as the first conductor 15. Also by this modification, the same effect as the second modification can be obtained. Since the unit cell 50 can be formed of two layers of the first conductor 15 and the second conductor 25, the wireless communication device 100 can be thinned.
- FIG. 11A is a perspective view for explaining a fourth modification of the unit cell 50.
- This unit cell 50 is different from the third modification shown in FIG. 10B in that the facing portion 361 is an open stub type in which the opposing portion 361 is not a patch but is linear.
- FIG. 11B is an explanatory diagram of an equivalent circuit of the unit cell 50 according to the fourth modification.
- This equivalent circuit has an open stub instead of the LC series resonance circuit in FIGS. 2 and 6, and other configurations are the same as those in FIGS. 2 and 6.
- the linear opposing portion 361 is electrically coupled to the opposing second conductor 25 to form a microstrip line having the second conductor 25 as a return path.
- One end of the microstrip line is an open end, and is configured to function as an open stub.
- the unit cell 50 configured in this way can be expressed by the equivalent circuit of FIG. 11B in which a parallel plate composed of the first conductor 15 and the second conductor 25 is shunted by an open stub.
- the conductor 15 and the second conductor 25 are short-circuited. Since the frequency to be short-circuited can be controlled by the stub length of the open stub, adjustment is easy, and the unit cell 50 can be downsized.
- the facing portion 361 can be curved or bent in addition to a straight line.
- the dimension of the linear facing portion 361 in the length direction is larger than the dimension in the width direction perpendicular to the dimension.
- the aspect ratio of the facing portion 361 is not particularly limited.
- FIG. 12A is a perspective view for explaining a fifth modification of the unit cell 50.
- This unit cell 50 has the same configuration as that of the unit cell 50 shown in FIGS. 2 and 6 except that the facing portion 361 is linear.
- the facing portion 361 of the present modification extends in parallel with the first conductor 15. One end of the facing portion 361 is connected to the connection member 362, and the other end is an open end.
- FIG. 12B is an explanatory diagram of an equivalent circuit of the unit cell 50 according to the fifth modification.
- the unit cell 50 of the fifth modification is shown in FIGS. 2 and 6 except that it has an open stub instead of the first capacitance formed by the facing portion 361 and the second conductor 25. This is the same as the equivalent circuit.
- the open stub is formed by a linear facing portion 361 and a portion of the second conductor 25 facing the facing portion 361.
- the unit cell 50 is given a large inductance. For this reason, the adjustment range of the characteristic of a metamaterial becomes large.
- metamaterial characteristics such as inductance can be adjusted by changing the positions and dimensions of the facing portion 361 and the connecting member 362 of the conductor element 36a. For this reason, it is good to provide the conductor element 36a from which an appropriate metamaterial characteristic is acquired according to the impedance value of the 1st conductor 15 and the 2nd conductor 25 in the open state or closed state of the radio
- the EBG structure is in two or more states of a closed state (FIG. 3A), a crossed state (FIG. 3C), or an open state (FIG. 3E).
- a plurality of conductor elements 36a (unit cells 50) may be provided in the first housing 10 or the second housing 20 so as to be established.
- the metamaterial characteristics (inductance) of the established EBG structure may be different from each other. Thereby, the difference of the impedance value of the 1st conductor 15 and the 2nd conductor 25 in a closed state, a crossing state, and an open state can be reduced suitably.
- a different type may be selected from the unit cells 50 illustrated in FIGS. 2, 6 and 9A to 12B. Or after selecting the same kind of unit cell 50, you may change the position and dimension of the opposing part 361 and the connection member 362 for every EBG structure.
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Abstract
Description
図1A、Bは、本実施形態にかかる無線通信装置100を厚み方向に切った縦断面模式図である。図1Aは無線通信装置100の第一状態を示し、図1Bは無線通信装置100の第二状態を示す模式図である。
無線通信装置100は、第一筐体10と、第二筐体20と、これらの第一筐体10および第二筐体20を面直軸まわりに互いに回転変位可能に連結する連結機構60と、を備えている。そして、第一筐体10と第二筐体20とが互いに回転変位することより、少なくとも以下の第一状態と第二状態とに切り替えられる。
第一筐体10は、第一導体15(第一回路基板14)と、この第一導体15(第一回路基板14)に接続された導体要素36aと、を含んでいる。第二筐体20は、第二導体25を含んでいる。
そして、第一状態(図1Aを参照)では、第二導体25における所定領域(対向領域241)と導体要素36aとが対向位置にあり、所定の周波数においてこの導体要素36aと第二導体25とが導通する。第二状態(図1Bを参照)は、導通状態が第一状態と異なる状態である。
本実施形態の第一筐体10は、ユーザが手で把持してキー操作する操作側筐体であり、操作キー12、第一回路基板14および電源(図示せず)が設けられている。操作キー12はユーザが指等で入力操作を行う入力インタフェースである。
本方法は、第一導体15(第一回路基板14)および第一導体15に接続された導体要素36aを含む第一筐体10と、第二導体25(第二回路基板24および第二の導体要素36b)を含む第二筐体20と、これらの第一筐体10と第二筐体20とを面直軸まわりに互いに回転変位可能に連結する連結機構60と、を備える無線通信装置100のインピーダンスを低減する方法に関する。本方法では、第一筐体10と第二筐体20とが回転変位して開放状態と閉止状態とに遷移するとともに、開放状態または閉止状態において、他の導体を介さずに第二導体25と所定の間隔で対向させた導体要素36aを無線通信装置100の通信周波数で共振させることにより、当該通信周波数における無線通信装置100のインピーダンスを低減することを特徴とする。
また、第二導体25が含む導体平面としては、第二回路基板24のほか、連結機構60を構成するベース板や可動板、または筐体のインサート板金を用いることもできる。
なお、EBG構造は各種が存在する。導体要素36aは、本実施形態のように導体平面と異層に形成される場合と、同層に形成される場合とがある。
なお、これらの欠陥が生じる要因としては、単位セル50間に配線やビア、接続部材362、366を通す場合の製造上の理由が挙げられる。このほか、既存の配線レイアウトや基板間接続構造にメタマテリアル構造を追加する場合において、既存のビアやパターン、接続部材によって単位セルが配置できない場合、または製造誤差、既存のビアやパターン、接続部材を単位セルの一部として用いる場合などが挙げられる。
第一実施形態では、メタマテリアルの単位セル50を構成する一対の導体平面として、第一回路基板14と第二回路基板24を用いる態様を例示した。これに対し、第二実施形態では、連結機構(ヒンジ機構)60を構成する一対の金属部材を導体平面として用いる態様を説明する。
第一の導体要素36aはベース板63に接続されている。すなわち、本実施形態においては、ベース板63が第一導体15にあたる。そして、第一の導体要素36aに対向する可動板61が第二導体25にあたる。また、第一実施形態と同様に、可動板61(第二導体25)には第二の導体要素36bが接続されている。第一の導体要素36aと第二の導体要素36bとは、ベース板63と可動板61の各内側に突出して設けられている。
この開放状態で、第一の導体要素36aと第二の導体要素36bとは対向位置にある。これにより、第一の導体要素36aと第二の導体要素36bとを含むEBG構造が成立し、無線通信装置100の通信周波数の電磁波を可動板61とベース板63との間で導通させる。すなわち、本実施形態の開放状態はEBG構造が成立した第一状態にあたる。このEBG構造の等価回路図は第一実施形態と共通である(図2を参照)。
ここで、第一導体15と第二導体25との相対位置とは、これらの相対的な並進位置と回転角度をいうものである。
図4A、図4Bは、本実施形態にかかる無線通信装置100の閉止状態と開放状態をそれぞれ示す平面模式図である。
図5Aは図4AのIIa-IIa線断面図であり、図5Bは図4BのIIb-IIb線断面図である。図5A、図5Bは、それぞれ図4A、図4Bを厚み方向に切った縦断面図である。
図5A、図5Bに示すように、第二筐体20は、表示出力部22に接続された第二回路基板24を内蔵している。第二回路基板24に搭載された表示制御部26は、連結機構60に挿通された配線(図示せず)を通じて第一回路基板14から信号を受信して表示出力部22の制御を行う。
より具体的には、図4Aおよび図5Aは、筐体の閉止状態に対応する第一状態を示している。そして、図4Bおよび図5Bは、筐体の開放状態に対応する第二状態を示している。本実施形態において筐体が複数の状態(スタイル)をとるとは、第一筐体10と第二筐体20との連結状態が異なる複数の安定状態を有することをいう。
より具体的には、図4A、図4Bに示すガイドピン66、67は、ベース板63に対して係脱可能に軸支されている。これにより、可動板61とベース板63とは、溝部64に沿う並進移動と、二本のガイドピン66、67のいずれかを軸心とする回転移動によって相対的に移動する。なお、図5Bにおいては、便宜上、可動板61、取付軸62およびガイドピン66は図示を省略している。
図4Bは、図4Aの閉止状態から第二筐体20を第一筐体10に対して時計回りに180度回転させた開放状態を示している。取付軸62とガイドピン66、67を用いた第二筐体20の具体的な動作は、図7Aから図7Cを用いて後述する。
第一導体15は、第一の導体要素36aと同じ側の筐体(本実施形態では第一筐体10)に存在する面状の導体である。本実施形態で面状とは、平面状と曲面状とを含む。
本実施形態ではベース板63を第一導体15として例示するが、これに限られない。例えば、第一筐体10に内蔵された第一回路基板14のグランド層を用いてもよい。または、第一筐体10がインサート成型で作成されている場合には、樹脂材料に埋め込まれた金属板(インサート板金)を第一導体15とすることもできる。
より具体的には、本実施形態の第二導体25は、図5A、図5Bに示すように、第二回路基板24と、その後面側に突出して形成された対向エレメント37a、37b、37cとからなる。
第一状態は、上述のように、第一の導体要素36aと第二導体25とが所定の間隔をもって対向し、所定の周波数において第一の導体要素36aと第二導体25とが導通した状態である。
第二状態は、第一の導体要素36aと第二導体25との導通状態が第一状態と異なる状態である。
そして本検出方法は、第一状態と第二状態とで、それぞれ第一の導体要素36aと第二導体25との導通状態を検知することにより、第一筐体10と第二筐体20との相対位置が第一状態または第二状態のいずれであるかを検知することを特徴とする。
第一の導体要素36aにおける平板状の対向部361はマッシュルームのヘッド部分に相当し、接続部材362はマッシュルームのインダクタンス部分に相当する。また、第二回路基板24の導体層(定電位層)における対向領域241が上側の導体平面に相当する。そして、ベース板63における対向領域241が下側の導体平面に相当する。
なお、EBG構造は各種が存在する。第一の導体要素36aは、本実施形態のように導体平面と異層に形成される場合と、同層に形成される場合とがある。
このメタマテリアルは、所定の周波数において第一の導体要素36aと第二導体25とを電気的に接続する。これにより、第一状態における第一の導体要素36aと対向エレメント37aとは、物理的には所定の間隔をもって離間しているものの、所定の周波数の電磁波に対して短絡された状態にある。以下、この周波数を短絡周波数という場合がある。
対向エレメント37aに関しても同様であり、複数個の対向エレメント37aがそれぞれ第一の導体要素36aと対向している場合、隣り合う対向部371の相互間で他のキャパシタンスが形成される。
そして、検知部70の電流検知部74は、印加部72が印加した所定の短絡周波数の電流に対して第一の導体要素36aと第二導体25(第二回路基板24または対向エレメント37a)が導通しているか否か、またはその導通の度合いを検知する。
図6では印加部72が第一回路基板14に設けられ、電流検知部74が第二回路基板24に設けられている状態を例示的に図示しているが、これに限られない。
ここで、電流検知部74は、このアンテナ素子40からの電流ノイズを検知して第一の導体要素36aと第二導体25、より具体的には第一の導体要素36aと対向エレメント37aとの間の導通を検知する。これにより、印加部72により検知電流を印加することなく、または検知電流に要する電力をきわめて低減して、第一状態における第一の導体要素36aと第二導体25との導通状態を電流検知部74で検知することができる。
これにより、第一の導体要素36aは所定の第一のキャパシタンスC1および第二のキャパシタンスC2を構成せず、上記短絡周波数に関して第一の導体要素36aと第二導体25とは絶縁しているか、または第一状態とは導通状態(電気特性)が変化する。かかる開放状態が、筐体の第二状態にあたる。
本実施形態の表示制御部26は、検知部70による検知結果に基づいて、出力情報の向きを第一状態と第二状態とで切り替える。
本表示方法では、第一状態と第二状態とでそれぞれ行う検知ステップと、検知された結果に基づいて表示出力部22に表示する出力情報の向きを第一状態と第二状態とで切り替える表示ステップと、を含む。
検知ステップでは、第一の導体要素36aと第二導体25との導通状態を検知することにより、第一筐体10と第二筐体20との相対位置が第一状態または第二状態のいずれであるかを検知する。
第一状態は、上述のように、第一の導体要素36aと第二導体25とが所定の間隔をもって対向し、所定の周波数において第一の導体要素36aと第二導体25とが導通した状態である。そして第二状態は、第一の導体要素36aと第二導体25との導通状態が第一状態と異なる状態である。
すなわち本表示方法の表示ステップでは、表示制御部26は、電流検知部74により検知された結果に基づいて、第一状態と第二状態とで互いに異なる向きに出力情報を表示する。
本実施形態の無線通信装置100は、図4A、図4Bに示した閉止状態と開放状態に加えて、連結機構60を中心に第一筐体10と第二筐体20の長手方向同士が略直交した交差状態を第三状態として有する。
図7Bは筐体の交差状態を示している。そして、図7Aは閉止状態(図4A)から交差状態に遷移する途中の第一遷移状態を示し、図7Cは交差状態から開放状態(図4B)に遷移する途中の第二遷移状態を示している。
図8は、図7BのV-V線断面図であり、図7Bを厚み方向に切った縦断面図に対応している。
第一遷移状態では、第一の導体要素36aと対向エレメント37aとは離間し、第一から第三の導体要素36a~36cと、対向エレメント37a~37cとは、いずれも対向しない。
これらのメタマテリアルは、第一状態(閉止状態)に加えて、第二状態(開放状態)または第三状態(交差状態)の少なくとも一方で、所定の周波数において第一導体15と第二導体25とを電気的に接続する。言い換えると、対向エレメント37a~37cは、第一状態で第一の導体要素36aに対向する領域と、第二状態または第三状態で第二の導体要素36bに対向する領域とに、それぞれ突出して設けられた他の導体要素である。
ここで、第一から第三状態で異なる一以上の導体要素がメタマテリアルを構成するとは、第一から第三の導体要素36a~36cと対向エレメント37a~37cとの対向するペアの組み合わせが、第一から第三状態のいずれか二つ以上において完全同一ではないことを意味する。例えば、第一の導体要素36aと対向エレメント37aとのペアが二つの状態で対向する場合には、他のペアが同時に対向することで、この二つの状態が互いに識別できることを要する。
筐体のスタイルが4以上の場合も同様であり、各状態で成立するEBG構造またはその組み合わせが完全同一とならないように、第一筐体10または第二筐体20の一方または両方に導体要素を配置すればよい。
本実施形態では、さらに第三の導体要素36cを備えることにより、筐体の多様なスタイルを検知することができ、また検出の信頼性を高めることができる。
各状態で成立するメタマテリアルが導通させる短絡周波数が通信周波数である場合、上述のように、アンテナ素子40に起因する電流ノイズが導体要素を導通することを検知して筐体の状態を知得することができる。なお、無線通信装置100が複数の通信周波数を備える場合において、これらの短絡周波数は共通でもよく、または互いに相違してもよい。
これにより、第一から第三の導体要素36a~36cと対向エレメント37a~37cとのいずれか同士が対向した安定状態のみEBG構造が成立し、筐体の遷移状態(図7Aおよび図7C)ではEBG構造が不成立となる。これにより、検知部70は筐体の遷移状態を正確に知得することができる。
本実施形態に用いられる導体要素についてより詳細に説明する。
図1A、図1B、図2、図6に示した、いわゆるマッシュルーム型の導体要素36aは、第一導体15と異層に積層して設けられた平板状の対向部361と、これに立設された柱状の接続部材362とを備えている。かかるEBG構造をパッチ型という場合がある。
本実施形態に用いられるEBG構造としては、パッチ型に代えて、線状の伝送線路を設けたマイクロストリップ線路を用いることもできる。具体的には、マイクロストリップ線路の一端を第一導体15に接続し、他端をオープン端とするオープンスタブ構造とする。以下、かかるEBG構造をオープンスタブ型という場合がある。
パッチ型、オープンスタブ型とも、対向部361を第一導体15と同層で島状に形成してもよく、または上記実施形態のように対向部361を第一導体15と異層で形成してもよい。さらに、対向部361または接続部材362に対して、インダクタンスを増加するための線状要素を付加してもよい。
これらのEBG構造を、本実施形態の変形例として以下に説明する。
そして、配線3613は第二のインダクタンス要素として機能する。このインダクタンス要素は、第四のキャパシタンスと直列に設けられている。また、この第二のインダクタンス要素および第四のキャパシタンスは、第一のキャパシタンス(第一導体片3611)と並列になっている。
Claims (32)
- 第一導体および前記第一導体に接続された導体要素を含む第一筐体と、第二導体を含む第二筐体と、前記第一筐体と前記第二筐体とを面直軸まわりに互いに回転変位可能に連結する連結機構と、を備え、
前記第一筐体と前記第二筐体とが互いに回転変位することより、少なくとも、前記第二導体における所定領域と前記導体要素とが対向位置にあり所定の周波数において前記導体要素と前記第二導体とが導通した第一状態と、前記導通状態が前記第一状態と異なる第二状態と、に切り替えられることを特徴とする無線通信装置。 - 前記第二状態において、前記所定領域と前記導体要素とが非対向位置にある請求項1に記載の無線通信装置。
- 前記第一状態において、前記第一導体、前記導体要素および前記第二導体がメタマテリアルの少なくとも一部を構成し、
前記メタマテリアルが、前記無線通信装置の通信周波数において、前記第一状態の前記導体要素と前記第二導体とを電気的に接続する請求項1または2に記載の無線通信装置。 - 前記第二導体が、前記所定領域に第二の導体要素を備える請求項3に記載の無線通信装置。
- 前記導体要素と前記第二の導体要素が、前記第一状態において対向する前記第一導体と前記第二導体の内側にそれぞれ突出して設けられている請求項4に記載の無線通信装置。
- 前記導体要素または前記第二の導体要素の少なくとも一方が、前記第一導体または前記第二導体と同層に設けられている請求項4に記載の無線通信装置。
- 前記第一導体または前記第二導体が第三の導体要素を備え、前記第二状態において、前記導体要素または前記第二の導体要素と、前記第三の導体要素とが対向してメタマテリアルの少なくとも一部を構成する請求項4から6のいずれか一項に記載の無線通信装置。
- 前記通信周波数に対する前記第一導体と前記第二導体とのインピーダンス値が、前記第一状態と前記第二状態とで互いに相違する請求項7に記載の無線通信装置。
- 前記連結機構が、前記第一状態と前記第二状態にそれぞれ対応する複数の安定状態を備える請求項1から8のいずれか一項に記載の無線通信装置。
- 前記連結機構を中心に前記第一筐体と前記第二筐体の長手方向同士が同方向を向いた閉止状態と、前記長手方向同士が逆方向を向いた開放状態と、前記長手方向同士が略直交した交差状態と、を前記安定状態として備える請求項9に記載の無線通信装置。
- 前記開放状態において前記第一状態をとることを特徴とする請求項10に記載の無線通信装置。
- 前記所定の周波数が、前記無線通信装置が備えるアンテナ素子の通信周波数である請求項1から11のいずれか一項に記載の無線通信装置。
- 前記導体要素と前記第二導体との導通状態を検知する検知手段をさらに備える請求項1から12のいずれか一項に記載の無線通信装置。
- 出力情報を表示する表示出力部と、前記表示出力部に表示する前記出力情報の向きを複数通りに切り替える表示制御手段と、をさらに備え、
前記表示制御手段は、前記検知手段による検知結果に基づいて、前記出力情報の向きを前記第一状態と前記第二状態とで切り替えることを特徴とする請求項13に記載の無線通信装置。 - 前記第二導体のうち前記第一状態で前記導体要素に対向する所定領域が、前記第二状態で前記導体要素と非対向位置にある請求項13または14に記載の無線通信装置。
- 前記検知手段が、前記導体要素と前記第二導体との間に前記周波数の電流を印加する印加手段と、前記導体要素と前記第二導体との間の前記電流を検知する電流検知手段と、を備える請求項13から15のいずれか一項に記載の無線通信装置。
- 前記連結機構が、前記第一状態と前記第二状態にそれぞれ対応する複数の安定状態を備える請求項13から16のいずれか一項に記載の無線通信装置。
- 前記連結機構を中心に前記第一筐体と前記第二筐体の長手方向同士が同方向を向いた閉止状態と、前記長手方向同士が逆方向を向いた開放状態と、を前記第一状態または前記第二状態のいずれかとして備える請求項17に記載の無線通信装置。
- 前記導通状態が前記第一状態および前記第二状態と異なる第三状態を有し、
前記連結機構が、前記第三状態に対応する他の安定状態をさらに備える請求項17または18に記載の無線通信装置。 - 前記第三状態は、前記連結機構を中心に前記第一筐体と前記第二筐体の長手方向同士が略直交した交差状態である請求項19に記載の無線通信装置。
- 前記第一導体または前記第二導体のいずれか一方に接続された第二の導体要素をさらに備え、
前記第二状態または前記第三状態において、前記第二の導体要素と、前記第一導体または前記第二導体のいずれか他方とが対向し所定の周波数において前記第一導体と前記第二導体とが導通することを特徴とする請求項19または20に記載の無線通信装置。 - 前記第一状態において、前記導体要素、前記第一導体および前記第二導体がメタマテリアルの少なくとも一部を構成し、
前記第二状態または前記第三状態において、前記第二の導体要素、前記第一導体および前記第二導体がメタマテリアルの少なくとも一部を構成し、
前記メタマテリアルが、前記第一状態ならびに前記第二状態もしくは前記第三状態で、所定の周波数において前記第一導体と前記第二導体とを電気的に接続する請求項21に記載の無線通信装置。 - 前記第一状態で前記導体要素が構成する前記メタマテリアルにかかる前記周波数と、前記第二状態または前記第三状態で前記第二導体が構成する前記メタマテリアルにかかる前記周波数とが、前記無線通信装置が備えるアンテナ素子の通信周波数である請求項22に記載の無線通信装置。
- 前記第一導体または前記第二導体に接続された第三の導体要素をさらに備え、
前記第一状態、前記第二状態および前記第三状態で、前記導体要素と前記第二の導体要素と前記第三の導体要素のうち異なる一以上がメタマテリアルを構成する請求項22または23に記載の無線通信装置。 - 前記第一導体または前記第二導体のうち少なくとも一方における異なる3つの領域に、前記導体要素と前記第二の導体要素と前記第三の導体要素とが配置されている請求項24に記載の無線通信装置。
- 前記導体要素と前記第二の導体要素と前記第三の導体要素とが、前記第一導体または前記第二導体において対向する内側にそれぞれ突出して設けられている請求項24または25に記載の無線通信装置。
- 前記第二導体のうち前記第一状態で前記導体要素に対向する所定領域に導電性の対向エレメントが設けられている請求項13から26のいずれか一項に記載の無線通信装置。
- 前記導体要素と前記対向エレメントとが、前記第一導体と前記第二導体において対向する内側にそれぞれ突出して設けられている請求項27に記載の無線通信装置。
- 前記導体要素または前記対向エレメントの少なくとも一方が、前記第一導体または前記第二導体と同層に設けられている請求項27に記載の無線通信装置。
- 第一導体および前記第一導体に接続された導体要素を含む第一筐体と、第二導体を含む第二筐体と、前記第一筐体と前記第二筐体とを面直軸まわりに互いに回転変位可能に連結する連結機構と、を備える無線通信装置のインピーダンスを低減する方法であって、
前記第一筐体と前記第二筐体とが回転変位して開放状態と閉止状態とに遷移するとともに、前記開放状態または前記閉止状態において、前記第二導体と所定の間隔で対向させた前記導体要素を前記無線通信装置の通信周波数で共振させることにより、当該通信周波数における前記無線通信装置のインピーダンスを低減することを特徴とするインピーダンス調整方法。 - 第一導体および前記第一導体に接続された導体要素を含む第一筐体と、第二導体を含む第二筐体と、前記第一筐体と前記第二筐体とを面直軸まわりに互いに回転変位可能に連結する連結機構と、を備える無線通信装置における前記第一筐体と前記第二筐体との相対位置を検出する方法であって、
前記導体要素と前記第二導体とが所定の間隔をもって対向し、所定の周波数において前記導体要素と前記第二導体とが導通した第一状態と、
導通状態が前記第一状態と異なる第二状態と、でそれぞれ前記導体要素と前記第二導体との前記導通状態を検知することにより、前記第一筐体と前記第二筐体との相対位置が前記第一状態または前記第二状態のいずれであるかを検知することを特徴とする筐体位置検出方法。 - 第一導体および前記第一導体に接続された導体要素を含む第一筐体と、第二導体を含む第二筐体と、前記第一筐体と前記第二筐体とを面直軸まわりに互いに回転変位可能に連結する連結機構と、を備える無線通信装置における前記第一筐体または前記第二筐体のいずれかに設けられた表示出力部において出力情報を表示する方法であって、
前記導体要素と前記第二導体とが所定の間隔をもって対向し、所定の周波数において前記導体要素と前記第二導体とが導通した第一状態と、
導通状態が前記第一状態と異なる第二状態と、でそれぞれ前記導体要素と前記第二導体との前記導通状態を検知することにより、前記第一筐体と前記第二筐体との相対位置が前記第一状態または前記第二状態のいずれであるかを検知するステップと、
検知された結果に基づいて、前記表示出力部に表示する前記出力情報の向きを前記第一状態と前記第二状態とで切り替えるステップと、
を含む情報表示方法。
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EP2555318A1 (en) | 2013-02-06 |
US8855721B2 (en) | 2014-10-07 |
JPWO2011121957A1 (ja) | 2013-07-04 |
CN102859788A (zh) | 2013-01-02 |
US20120295666A1 (en) | 2012-11-22 |
EP2555318A4 (en) | 2015-09-09 |
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