JP2007221419A - Cellular phone - Google Patents

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JP2007221419A
JP2007221419A JP2006039041A JP2006039041A JP2007221419A JP 2007221419 A JP2007221419 A JP 2007221419A JP 2006039041 A JP2006039041 A JP 2006039041A JP 2006039041 A JP2006039041 A JP 2006039041A JP 2007221419 A JP2007221419 A JP 2007221419A
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mobile phone
antenna coil
built
writer
antenna
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JP4780652B2 (en
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Masayuki Waki
正之 脇
Hideyo Tanaka
秀世 田中
Hiroyuki Nagase
博之 長瀬
Naoto Kii
直人 紀伊
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JR East Mechatronics Co Ltd
Panasonic Holdings Corp
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JR East Mechatronics Co Ltd
Matsushita Electric Industrial Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a cellular phone with a built-in IC card functions, in which communication success rate on a surface in which an antenna coil is not built in is high. <P>SOLUTION: The cellular phone with built-in IC card functions incorporates an antenna coil 2 other than an antenna for communicating with a base station. Since a correcting resonance circuit composed of a correcting coil 5 and a tuning capacitor 6 is built in the surface in which the antenna coil 2 is not built, the communication success rate on the surface in which the antenna coil is not built can be improved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ＩＣカード機能内蔵の携帯電話機のアンテナコイルが配されていない面での通信成功率を向上させる技術に関する。   The present invention relates to a technique for improving a communication success rate in a surface where an antenna coil of a mobile phone with a built-in IC card function is not provided.

公共交通機関における自動改札機の入札、出札等に、近年、リサイクル使用できるＩＣカードが利用され始めている。このようなＩＣカードは、自動改札機等に内蔵されたカードリーダライタとの間で、非接触式で無線通信を行うように設定されている非接触式ＩＣカードであり、例えば、定期券としての価値情報や乗車券をプリペイドするための金額情報が書き込まれていて、『Ｓｕｉｃａ（登録商標）』などと呼ばれ、定期券やストアードフェア型の乗車券として広く普及し始めている。一方、携帯電話機は広く一般に普及しており、通勤・通学者の大半も所持していることから、携帯電話機に、前記のようなＩＣカードの機能を持たせることが検討されている。   In recent years, recyclable IC cards have begun to be used for bidding and ticketing of automatic ticket gates in public transportation. Such an IC card is a non-contact type IC card that is set to perform wireless communication in a non-contact manner with a card reader / writer built in an automatic ticket gate or the like. Value information and money amount information for prepaid the ticket are written, which is called “Suica (registered trademark)”, and is beginning to spread widely as a commuter pass or a stored fair type ticket. On the other hand, since mobile phones are widely spread and generally possessed by most commuters / commuters, it is considered that the mobile phone has the IC card function as described above.

このようなＩＣカード機能内蔵携帯電話機としては、例えば、特許文献１（特開２００５−２０４１８８号公報）に、携帯電話機能を有する通信デバイス内に、接触、非接触両用ＳＩＭを装着し、デバイス内に有するアンテナコイルを介して外部機器との間で交通運賃や取引の決済処理を可能にした非接触通信デバイスであって、ＳＩＭ内の取引データを表示する表示機能面を当該デバイスの一面に有し、当該表示機能面とは反対側のデバイス面の一部もしくは全面に、クッション性素材を付与して外部機器受信部と接触した際の衝撃を緩和したことを特徴とする携帯可能な非接触通信デバイスが開示されている。
特開２００５−２０４１８８号公報 As such a mobile phone with a built-in IC card function, for example, in Patent Document 1 (Japanese Patent Laid-Open No. 2005-204188), a contact / non-contact SIM is mounted in a communication device having a mobile phone function. Non-contact communication device that enables payment processing of traffic fares and transactions with an external device via an antenna coil included in the device, and has a display function surface for displaying transaction data in the SIM on one side of the device. A portable non-contact, characterized in that a cushioning material is applied to part or all of the device surface opposite to the display function surface to reduce the impact when contacting the external device receiver. A communication device is disclosed.
JP-A-2005-204188

非接触式ＩＣカードは、定期券入れ等に入れたままで自動改札機のカードリーダライタ部にかざすだけで、カードリーダライタ部との間で無線通信ができるようになっている。このような非接触式ＩＣカードには、ＩＣカード面全体をほぼカバーするようなコイル状のアンテナが内蔵されており、従って、自動改札機のカードリーダライタの無線通信可能エリアをそれほど意識することなく、カードの表面でも裏面でも、或いは定期券入れ等に入れたままで、といったような使い方をすることができる。   The non-contact type IC card can be wirelessly communicated with the card reader / writer unit by simply holding it over the card reader / writer unit of the automatic ticket gate while being put in a commuter pass. Such a non-contact type IC card has a built-in coil-shaped antenna that covers almost the entire IC card surface, so that the wireless communication area of the card reader / writer of the automatic ticket checker is so conscious. The card can be used on the front or back side of the card or in a commuter pass compartment.

これに対して、特許文献１に記載されているような携帯電話機の場合には、利用者は携帯電話機に内蔵されているアンテナコイルの位置の概略を認識しておいた上で、これを自動改札機のカードリーダライタ部にかざす、という作業を意識的に行わなければならない。非接触式ＩＣカードの場合では、カード表裏両面でカードリーダライタによる認識が可能であったのに対して、携帯電話機の場合には、コイルアンテナが内蔵されている面での認識確率は高いが、もう一方の面での認識確率がきわめて低く、通信不能に陥るという状況があり、この点、利用者が非常に不便に感じるという、問題があった。   On the other hand, in the case of a mobile phone as described in Patent Document 1, the user recognizes the outline of the position of the antenna coil built in the mobile phone and It must be done consciously to hold it over the card reader / writer section of the ticket gate. In the case of a non-contact type IC card, the card reader / writer can recognize both sides of the card, whereas in the case of a mobile phone, the recognition probability is high on the surface where the coil antenna is built. However, there is a situation where the recognition probability on the other side is very low and communication is impossible. In this respect, there is a problem that the user feels very inconvenient.

このような課題を解決するために、請求項１に係る発明は、基地局との通信を行うためのアンテナ以外のアンテナコイルを内蔵し、該アンテナコイルで外部のカードリーダライタと非接触で通信を行う携帯電話機において、該アンテナコイルが内蔵されていない面に補正用共振回路を内蔵することを特徴とする。   In order to solve such a problem, the invention according to claim 1 incorporates an antenna coil other than the antenna for communicating with the base station, and communicates with an external card reader / writer in a non-contact manner using the antenna coil. In the cellular phone that performs the above, a correction resonance circuit is built in a surface where the antenna coil is not built.

また、請求項２に係る発明は、基地局との通信を行うためのアンテナ以外のアンテナコイルを内蔵し、該アンテナコイルで外部のカードリーダライタと非接触で通信を行う携帯電話機において、着脱式交換カバーに補正用共振回路を内蔵することを特徴とする。   According to a second aspect of the present invention, there is provided a portable telephone having a built-in antenna coil other than an antenna for performing communication with a base station and performing non-contact communication with an external card reader / writer using the antenna coil. A correction resonance circuit is built in the replacement cover.

また、請求項３に係る発明は、請求項１又は請求項２に記載の携帯電話機において、該補正用共振回路は、補正用コイルと同調コンデンサとからなることを特徴とする。   According to a third aspect of the present invention, in the mobile phone according to the first or second aspect, the correction resonance circuit includes a correction coil and a tuning capacitor.

本発明によれば、携帯電話機のアンテナコイルが内蔵されていない方の面に補正用共振回路を設けるだけの単純で安価な構成により、アンテナコイルが内蔵されていない方の面をカードリーダライタにかざす際の、通信の成功率を高めることができる。   According to the present invention, the card reader / writer is provided with the surface without the antenna coil by a simple and inexpensive configuration in which the correction resonance circuit is provided on the surface without the antenna coil of the mobile phone. The success rate of communication when you hold it over can be increased.

また、本発明によれば、補正用共振回路を内蔵した着脱式交換カバーを携帯電話機に取り付けるだけで、アンテナコイルが内蔵されていない方の面である携帯電話機の正面での、通信の成功率を高めることができるように携帯電話機を改良することができる。   In addition, according to the present invention, the communication success rate on the front surface of the mobile phone, which is the side where the antenna coil is not installed, is simply attached to the mobile phone with the detachable replacement cover containing the correction resonance circuit. Thus, the mobile phone can be improved.

以下、本発明の実施の形態を図面を参照しつつ説明する。図１は、本発明の実施の形態に係る携帯電話機の外観図である。本実施形態を、折りたたみ式の携帯電話機に基づいて説明するが、本発明は、折りたたみ式携帯電話機以外の携帯電話機にも適用し得るものである。図1（ａ）は、本実施形態の携帯電話機を折りたたんだ状態で正面から見たものである。また、図1（ｂ）は、本実施形態の携帯電話機を折りたたんだ状態で裏面から見たものである。また、図1（ｃ）は、本実施形態の携帯電話機を折りたたんだ状態で側面から見たものである。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external view of a mobile phone according to an embodiment of the present invention. Although this embodiment is described based on a foldable mobile phone, the present invention can also be applied to mobile phones other than the foldable mobile phone. FIG. 1A is a front view of the cellular phone according to the present embodiment in a folded state. FIG. 1B shows the cellular phone according to this embodiment viewed from the back side in a folded state. FIG. 1 (c) is a side view of the cellular phone according to the present embodiment folded.

図1において、１は本実施形態に係る携帯電話機であり、２はアンテナコイル、３はこのアンテナコイル２に接続されたＩＣチップ、４はヒンジ、５は補正用コイル、６は同調コンデンサである。アンテナコイル２は、自動改札機等に内蔵されたカードリーダライタとの間で通信を行うためのアンテナであり、このアンテナコイル２に接続されたＩＣチップ３にはＩＣチップ３毎の識別番号や金銭情報等が記憶されている。携帯電話機１は、アンテナコイル２以外に、基地局との間の通信のために用いる、図示しない通信用メインアンテナを備えている。   In FIG. 1, 1 is a mobile phone according to the present embodiment, 2 is an antenna coil, 3 is an IC chip connected to the antenna coil 2, 4 is a hinge, 5 is a correction coil, and 6 is a tuning capacitor. . The antenna coil 2 is an antenna for communicating with a card reader / writer built in an automatic ticket gate, etc. The IC chip 3 connected to the antenna coil 2 has an identification number for each IC chip 3 and the like. Money information and the like are stored. In addition to the antenna coil 2, the mobile phone 1 includes a communication main antenna (not shown) used for communication with a base station.

携帯電話機１はヒンジ４を利用し開閉できるようになっており、通話時には開状態として利用し、携帯電話機１を携行する際には閉状態とする。自動改札機等を通過する際には、携行している携帯電話機１をカードリーダライタにかざすように用いるので、このときは図1に示すように携帯電話機１は、折りたたんだ状態である、閉状態となっている。携帯電話が折りたたまれた状態であると、携帯電話機１の正面か裏面かの見分けがつきにくい。アンテナコイル２は携帯電話機１の裏面に設けられているので、裏面の方をカードリーダライタにかざすと通信の成功確率が高いわけであるが、上述のように見分けがつきにくいため利用者は、携帯電話機１の正面側をカードリーダライタにかざすことがままある。   The mobile phone 1 can be opened and closed using the hinge 4, and is used in an open state during a call, and is closed when the mobile phone 1 is carried. When passing through an automatic ticket gate or the like, the mobile phone 1 that is being carried is used so as to be held over the card reader / writer. At this time, as shown in FIG. 1, the mobile phone 1 is in a folded state. It is in a state. When the mobile phone is in a folded state, it is difficult to distinguish between the front side and the back side of the mobile phone 1. Since the antenna coil 2 is provided on the back side of the mobile phone 1, if the back side is held over a card reader / writer, the success probability of communication is high. However, as described above, it is difficult to distinguish the user. There are cases where the front side of the mobile phone 1 is held over a card reader / writer.

そこで本実施形態においては、図1に示すように携帯電話機１の正面側に、補正用コイル５と同調コンデンサ６とが並列接続されてなる補正用共振回路を内蔵しておくことによりこれに対処する。なお、本明細書において、「コイルが内蔵される面」とは、そのコイルから最も近い携帯電話機の表面のことをいう。   Therefore, in the present embodiment, as shown in FIG. 1, a correction resonance circuit in which a correction coil 5 and a tuning capacitor 6 are connected in parallel is built in on the front side of the mobile phone 1. To do. In this specification, the “surface in which the coil is built” refers to the surface of the mobile phone closest to the coil.

このような補正用共振回路が内蔵されていない場合の現象につき説明する。携帯電話機の正面側の筐体部分の金属部品が、カードリーダライタのアンテナに近づくことによって、カードリーダライタのアンテナの共振周波数が高くずれてしまい、このアンテナと送信回路終段部とのインピーダンスの整合がとれなくなってしまう。そうすると送信信号に反射が生じ、結果としてカードリーダライタからの送信信号の変調波形にひずみが生じて通信不能となっていた。   A phenomenon in the case where such a correcting resonance circuit is not incorporated will be described. When the metal part of the housing part on the front side of the cellular phone approaches the antenna of the card reader / writer, the resonance frequency of the antenna of the card reader / writer is shifted to a high level, and the impedance of this antenna and the transmission circuit final stage portion is shifted. It will not be possible to match. Then, the transmission signal is reflected, and as a result, the modulation waveform of the transmission signal from the card reader / writer is distorted and communication is impossible.

このように携帯電話機の正面側の筐体部分の金属部品がリーダライタに近づくと、リーダライタのアンテナの共振周波数は高くずれる。一方、共振回路に、他の共振回路が近づき相互誘導が生じると共振周波数は下がることが知られている。本実施形態では、この現象を利用して、携帯電話機内に補正用コイル５と同調コンデンサ６とからなる補正用共振回路を設け、筐体の金属によるリーダライタのアンテナの共振周波数の上側への偏移を、相互誘導によって打ち消すように構成することによって、リーダライタの送信信号の変調波形のひずみを軽減する。   As described above, when the metal part of the casing portion on the front side of the mobile phone approaches the reader / writer, the resonance frequency of the antenna of the reader / writer shifts high. On the other hand, it is known that the resonance frequency is lowered when another resonance circuit approaches the resonance circuit and mutual induction occurs. In the present embodiment, by utilizing this phenomenon, a correction resonance circuit including a correction coil 5 and a tuning capacitor 6 is provided in the mobile phone, and the resonance frequency of the antenna of the reader / writer by the metal of the casing is increased. By configuring so that the shift is canceled by mutual induction, distortion of the modulation waveform of the transmission signal of the reader / writer is reduced.

次に、本実施形態のように携帯電話機に補正用共振回路を設ける効果について図3乃至図5を用いて説明する。図3は、補正用共振回路が設けられていない携帯電話機の裏面（アンテナコイル内蔵側）をカードリーダライタで読み取った場合の信号波形である。また、図4は、補正用共振回路が設けられていない携帯電話機の正面（アンテナコイル非内蔵側）をカードリーダライタで読み取った場合の信号波形である。また、図5は、本実施形態に係る補正用共振回路が内蔵された携帯電話機１の正面（アンテナコイル非内蔵側）をカードリーダライタで読み取った場合の信号波形である。図3乃至図5において、縦軸は、１Ｖ／ｄｉｖ、横軸は４μｓ／ｄｉｖである。また、カードリーダライタ面から１０ｍｍでの測定結果である。   Next, the effect of providing the correcting resonance circuit in the mobile phone as in this embodiment will be described with reference to FIGS. FIG. 3 shows signal waveforms when a card reader / writer is used to read the back surface (the side with the built-in antenna coil) of a mobile phone not provided with a correction resonance circuit. FIG. 4 shows signal waveforms when a card reader / writer is used to read the front side (the antenna coil non-built-in side) of the mobile phone not provided with the correction resonance circuit. FIG. 5 shows signal waveforms when the card reader / writer reads the front surface (the side without the antenna coil) of the mobile phone 1 in which the correction resonance circuit according to the present embodiment is built. 3 to 5, the vertical axis represents 1 V / div, and the horizontal axis represents 4 μs / div. Moreover, it is a measurement result at 10 mm from the card reader / writer surface.

図3に示されるように、携帯電話機の裏面（アンテナコイル内蔵側）をカードリーダライタで読み取った場合については、問題なく信号波形を読み取ることができることが分かる。これに対して、図4に示されるように、携帯電話機の正面（アンテナコイル非内蔵側）をカードリーダライタで読み取った場合については、位相が反転していることに加え、信号レベルが小さすぎて通信不能状態となることがわかる。図5の本実施形態のように、補正用共振回路が設けられていれば、例えアンテナコイル非内蔵側をカードリーダライタで読み取ったとしても、位相反転を起こすことなく、通信可能なレベルの信号波形を得ることができる。   As shown in FIG. 3, it can be seen that the signal waveform can be read without any problem when the back side of the mobile phone (the side with the built-in antenna coil) is read with a card reader / writer. On the other hand, as shown in FIG. 4, when the front side of the mobile phone (side without the antenna coil) is read with a card reader / writer, the signal level is too low in addition to the phase being reversed. It turns out that communication becomes impossible. If a correction resonance circuit is provided as in the present embodiment of FIG. 5, even if the antenna coil non-built-in side is read by a card reader / writer, a signal at a level that allows communication without causing phase inversion A waveform can be obtained.

このように、本実施形態では、携帯電話機１のアンテナコイルが内蔵されていない方の面に補正用共振回路を設けるだけの単純で安価な構成により、アンテナコイルが内蔵されていない方の面をカードリーダライタにかざす際の、通信の成功率を高めることができる。   As described above, in the present embodiment, the surface of the cellular phone 1 that does not have the antenna coil built-in is simply and inexpensively configured by simply providing the correction resonance circuit on the surface that does not have the antenna coil built-in. The success rate of communication when holding the card reader / writer over can be increased.

次に、本発明の他の実施の形態を図面を参照しつつ説明する。図２は、本発明の他の実施の形態に係る携帯電話機の外観図である。この実施形態でも、折りたたみ式の携帯電話機に基づいて説明する。図1（ａ）は、本実施形態の携帯電話機を折りたたんだ状態で正面から見たものである。また、図1（ｂ）は、本実施形態の携帯電話機を折りたたんだ状態で裏面から見たものである。また、図1（ｃ）は、本実施形態の携帯電話機を折りたたんだ状態で側面から見たものである。   Next, another embodiment of the present invention will be described with reference to the drawings. FIG. 2 is an external view of a mobile phone according to another embodiment of the present invention. This embodiment will also be described based on a folding mobile phone. FIG. 1A is a front view of the cellular phone according to the present embodiment in a folded state. FIG. 1B shows the cellular phone according to this embodiment viewed from the back side in a folded state. FIG. 1 (c) is a side view of the cellular phone according to the present embodiment folded.

図２において、１は他の実施形態に係る携帯電話機であり、２はアンテナコイル、３はこのアンテナコイル２に接続されたＩＣチップ、４はヒンジ、５は補正用コイル、６は同調コンデンサ、７は着脱式交換カバーである。   In FIG. 2, 1 is a mobile phone according to another embodiment, 2 is an antenna coil, 3 is an IC chip connected to the antenna coil 2, 4 is a hinge, 5 is a correction coil, 6 is a tuning capacitor, Reference numeral 7 denotes a detachable exchange cover.

この実施形態は、５は補正用コイルと６は同調コンデンサとからなる補正用共振回路が着脱式交換カバー７に設けられている点が、先の実施形態と異なる。着脱式交換カバー７は、図1（ａ）に示すように、携帯電話機１の正面に取り付けるようにして用いる。このような着脱式交換カバー７は、様々なデザインのものと交換することにより携帯電話機１のデザインを楽しむための利用が本来的な利用方法であるが、着脱式交換カバー７に本発明の補正用共振回路を内蔵することにより、カードリーダライタとの通信の成功率が低かった、アンテナコイルが内蔵されていない方の面である携帯電話機１の正面での、通信の成功率を高めることができる。このような着脱式交換カバー７に本発明の補正用共振回路を内蔵するようにして用いても、図3乃至図5で説明したのと同様の効果を得ることができる。   This embodiment is different from the previous embodiment in that a correction resonance circuit including a correction coil 5 and a tuning capacitor 6 is provided on the detachable exchange cover 7. The detachable exchange cover 7 is used so as to be attached to the front surface of the mobile phone 1 as shown in FIG. Such a detachable exchange cover 7 is essentially used for enjoying the design of the mobile phone 1 by exchanging it with ones of various designs. By incorporating the resonant circuit for use, it is possible to increase the success rate of communication on the front surface of the mobile phone 1, which is the side where the antenna coil is not built, in which the success rate of communication with the card reader / writer is low. it can. Even if such a detachable exchange cover 7 is used so as to incorporate the correction resonance circuit of the present invention, the same effects as described in FIGS. 3 to 5 can be obtained.

このように他の実施形態によれば、補正用共振回路を内蔵した着脱式交換カバー７を携帯電話機１に取り付けるだけで、アンテナコイルが内蔵されていない方の面である携帯電話機１の正面での、通信の成功率を高めることができるように携帯電話機１を改良することができる。
As described above, according to another embodiment, the detachable replacement cover 7 including the correction resonance circuit is simply attached to the mobile phone 1, and the front surface of the mobile phone 1, which is the surface not including the antenna coil, is provided. The mobile phone 1 can be improved so that the success rate of communication can be increased.

本発明の実施の形態に係る携帯電話機の外観図である。1 is an external view of a mobile phone according to an embodiment of the present invention. 本発明の他の実施の形態に係る携帯電話機の外観図である。It is an external view of the mobile phone which concerns on other embodiment of this invention. 補正用共振回路が設けられていない携帯電話機の裏面（アンテナコイル内蔵側）をカードリーダライタで読み取った場合の信号波形である。It is a signal waveform when the card reader / writer reads the back surface (the antenna coil built-in side) of the mobile phone not provided with the correction resonance circuit. 補正用共振回路が設けられていない携帯電話機の正面（アンテナコイル非内蔵側）をカードリーダライタで読み取った場合の信号波形である。It is a signal waveform when a card reader / writer is used to read the front surface (the antenna coil non-built-in side) of a mobile phone not provided with a correction resonance circuit. 本実施形態に係る補正用共振回路が内蔵された携帯電話機１の正面（アンテナコイル非内蔵側）をカードリーダライタで読み取った場合の信号波形である。It is a signal waveform at the time of reading the front side (antenna coil non-incorporation side) of the mobile telephone 1 with which the correction | amendment resonance circuit which concerns on this embodiment was incorporated with the card reader / writer.

符号の説明Explanation of symbols

１・・・携帯電話機、２・・・アンテナコイル、３・・・ＩＣチップ、４・・・ヒンジ、５・・・補正用コイル、６・・・同調コンデンサ、７・・・着脱式交換カバー
DESCRIPTION OF SYMBOLS 1 ... Mobile phone, 2 ... Antenna coil, 3 ... IC chip, 4 ... Hinge, 5 ... Correction coil, 6 ... Tuning capacitor, 7 ... Detachable exchange cover

Claims (3)

基地局との通信を行うためのアンテナ以外のアンテナコイルを内蔵し、該アンテナコイルで外部のカードリーダライタと非接触で通信を行う携帯電話機において、
該アンテナコイルが内蔵されていない面に補正用共振回路を内蔵することを特徴とする携帯電話機。 In a mobile phone that incorporates an antenna coil other than an antenna for communicating with a base station, and communicates with an external card reader / writer with the antenna coil in a contactless manner,
A mobile phone comprising a correction resonance circuit on a surface not including the antenna coil. 基地局との通信を行うためのアンテナ以外のアンテナコイルを内蔵し、該アンテナコイルで外部のカードリーダライタと非接触で通信を行う携帯電話機において、
着脱式交換カバーに補正用共振回路を内蔵することを特徴とする携帯電話機。 In a mobile phone that incorporates an antenna coil other than an antenna for communicating with a base station, and communicates with an external card reader / writer with the antenna coil in a contactless manner,
A mobile phone comprising a correction resonance circuit in a detachable exchange cover. 該補正用共振回路は、補正用コイルと同調コンデンサとからなることを特徴とする請求項１又は請求項２に記載の携帯電話機。
The mobile phone according to claim 1 or 2, wherein the correction resonance circuit includes a correction coil and a tuning capacitor.
JP2006039041A 2006-02-16 2006-02-16 Mobile phone Active JP4780652B2 (en)

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