JP4398835B2 - Passbook for personal authentication - Google Patents

Description

  The present invention relates to a booklet type personal identification passbook with a face image used for authenticating an individual's identity such as a student ID card, employee ID card, bankbook, etc. The present invention relates to a passbook for personal authentication provided with a wireless IC module for performing transmission / reception by.

Conventionally, as an unauthorized access prevention method for this type of personal authentication passbook,
(1) When the wireless IC module is arranged on the front cover of the passbooks, and at the same time the passbooks are closed by arranging a conductive sheet made of a conductor having an area larger than the area of the antenna coil on the back cover. Communication with the outside is prevented (for example, refer to Patent Document 1).

  (2) The antenna coil is placed symmetrically across the front cover and the back cover, and the loop shape of the antenna coil collapses when the passbooks are closed. Communication is prevented (see, for example, Patent Document 1).

  (3) Access to the outside is prevented when the passbooks are closed by using a shield member that is difficult to block or pass electromagnetic waves on at least one page of the passbooks (see, for example, Patent Document 2).

It has been known.
Japanese Patent Laid-Open No. 10-203551 JP 11-348471 A

  The problem with the method of blocking radio waves by using the conductive sheet or the shield member that does not easily block or pass electromagnetic waves is that when the passbook is held over the antenna portion of the reader in an open state. The conductive sheet or shield member is close to or in close contact with the antenna portion of the reader.

  When the conductive sheet or shield member receives an alternating magnetic field radiated from the antenna of the reading device, the conductive sheet or shield member generates an “eddy current” due to the lines of magnetic force. At this time, the current consumed by the conductive sheet or the shield member is, of course, supplied by the AC magnetic field radiated from the reading device, so that the reading device flows more than a normal current.

  Further, there is a possibility that the antenna resonance frequency on the reading device side is shifted due to the conductive sheet or the shield member approaching the vicinity of the antenna portion of the reading device. As a result, there is a possibility that the antenna of the reading device may lead to a decrease in communication stability due to a resonance frequency shift, inability to communicate, or destruction of the antenna circuit due to an overcurrent on the reading device side.

  In addition, the problem with the method (2) is that the central part (back part) of the passbooks is not only accessed during reading with the reading device, but also when the passbooks are opened and closed during normal use. ) And the like, there is a risk that the antenna coil will be cut, and if the antenna coil is cut, communication becomes impossible.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a passbook for personal authentication that can prevent unauthorized access from the outside and prevent personal information from being falsified or forged.

  The passbooks for personal authentication of the present invention are formed into a booklet of a plurality of pages, and an IC chip in which personal information related to the owner of the passbooks for personal authentication is stored on a predetermined page and the IC chip A personal authentication passbook having a wireless IC module embedded in a wireless IC module for wirelessly transmitting / receiving to / from an external device, in a state where the personal authentication passbook is wide open, It is configured to have an antenna coil and a load corresponding to the IC chip connected to the antenna coil on a page that is symmetrical with the page where the IC module is embedded, and is tuned to the same resonance frequency as the wireless IC module. The quasi-resonant circuit portion is embedded.

  According to the passbook for personal authentication of the present invention, a wireless IC module is embedded in one page of the passbook, and a quasi-resonant that is tuned to the same resonance frequency as that of the wireless IC module on another page that is symmetrical with the wireless IC module. By burying the circuit portion, the wireless IC module can sufficiently receive power from the outside and can communicate with the bankbook opened. However, when the passbooks are closed, the wireless IC module and the quasi-resonant circuit unit overlap each other, so that each antenna coil has strong electromagnetic coupling. Therefore, the wireless IC module is affected by the quasi-resonant circuit unit, and the resonance frequency The effect of shifting occurs. For this reason, communication with the outside becomes difficult, unauthorized access from the outside becomes difficult, and personal information can be prevented from being falsified or forged.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, the first embodiment will be described.
1 and 2 schematically show the configuration of a passbook for personal authentication according to the first embodiment. This personal authentication passbook 11 is used for authenticating the personal status of a student ID card, employee ID card, bankbook, etc., for example, between two cover sheets 12 and 13 and these cover sheets 12 and 13. It consists of a plurality of bound pages (sheets) 14. For example, the inside of one cover (cover cover) 12 has a printing surface 12a, and on this printing surface 12a, the face image (face photo) 15 of the owner of the personal authentication passbook 11, ID Sheet information 16 such as a number, name, date of birth, gender, address, date of issue, expiration date, signature, etc. is printed. The face image 15 is obtained by, for example, printing a photograph by applying an image receiving layer on the surface, and color printing can also be performed as necessary. The contents of the ticket information 16 vary depending on the type of passbook for personal authentication.

  One cover (cover cover) 12 has a multilayer structure, and a wireless IC module 17 is embedded in an intermediate layer. The wireless IC module 17 performs wireless transmission and reception with a reading device (wireless reader / writer) as an external device, and stores the face image and personal information of the owner of the personal authentication passbook 11. The IC chip 18 and an antenna coil 19 connected to the IC chip 18 are configured.

  The IC chip 18 is mounted on the mounting substrate 20, and a tuning capacitor (not shown) is connected in parallel to the input terminal of the IC chip 18. The tuning capacitor and the antenna coil 19 constitute a resonance circuit. The antenna coil 19 may be configured, for example, by winding a copper wire that has been subjected to insulation treatment, or by applying a conductive paste directly to a resin sheet.

  The wireless IC module 17 is not limited to one cover (front cover) 12, but may be embedded in the other cover (back cover) 13 or a page (sheet) 14 between the covers 12 and 13, for example. .

  Further, as shown in FIG. 2, a quasi-resonant circuit unit 21 is embedded in the other cover (back cover) 13. The quasi-resonant circuit unit 21 includes an antenna coil 22 and a circuit board 23 including a tuning capacitor connected to the antenna coil 22 and a load resistance (none of which is shown) corresponding to the IC chip 18.

In the state where the personal authentication passbook 11 is closed, the quasi-resonant circuit unit 21 overlaps the wireless IC module 17 and the winding direction (a) of the antenna coil 22 is the antenna coil 19 of the wireless IC module 17. It is arrange | positioned so that it may become a reverse direction with the winding direction (b).
The antenna coil 22 of the quasi-resonant circuit unit 21 is formed with the same area and number of turns as the antenna coil 19 of the wireless IC module 17. Therefore, the same antenna coil 22 as the antenna coil 19 of the wireless IC module 17 may be used.

  Thus, when the personal authentication passbook 11 is closed, the winding direction of the antenna coil 19 of the wireless IC module 17 and the winding direction of the antenna coil 22 of the quasi-resonant circuit unit 21 are opposite to each other. The direction of the lines of magnetic force generated by the respective antenna coils 19 and 22 is canceled, making communication with the reading device difficult.

  The quasi-resonant circuit unit 21 is not limited to the other cover (back cover) 13, and may be embedded in one cover (cover cover) 12 or a page (sheet) 14 between the covers 12 and 13, for example. Good. However, it is a condition that the page is symmetrical with the page in which the wireless IC module 17 is embedded.

Hereinafter, the operation in such a configuration will be described.
It is assumed that the wireless IC module 17 embedded in one cover (cover cover) 12 is tuned to a predetermined resonance frequency f1. Further, when the personal authentication passbook 11 is closed, the antenna coil 22 is wound around the wireless IC module 17 in a position where it overlaps with the wireless IC module 17 when the personal authentication passbook 11 is closed. It is assumed that the quasi-resonant circuit unit 21 disposed so as to have an inverse relationship with the winding direction of the antenna coil 19 is also tuned to the same resonance frequency f1 as that of the wireless IC module 17.

  In a state where the personal authentication passbook 11 is opened, the wireless IC module 17 can sufficiently receive power from the reading device and can communicate. However, when the personal authentication passbook 11 is closed, the wireless IC module 17 and the quasi-resonant circuit unit 21 overlap each other. For this reason, since the mutual antenna coils 19 and 22 have strong electromagnetic coupling, the wireless IC module 17 is affected by the quasi-resonant circuit unit 21 and the resonance frequency is shifted.

により共振周波数ｆ１となる。同様に、擬似共振回路部２１もアンテナコイルＬ２（アンテナコイル２２）と同調コンデンサＣ２により共振周波数ｆ１に共振するものとする。互いのアンテナコイル１９，２２の共振周波数がｆ１と同じであるため、両者の結合度は非常に強くなる。ここで、無線ＩＣモジュール１７の負荷Ｒ１はＩＣチップ１８であり、擬似共振回路部２１の負荷Ｒ２はＩＣチップ１８相当の抵抗負荷とする。互いのアンテナコイル１９，２２の結合度が強くなると、図３（ｂ）に示すように、共振周波数ｆ１を中心に左右に共振点がずれる、いわゆる複同調作用が働く。 FIG. 3A shows an equivalent circuit of the wireless IC module 17 and the quasi-resonant circuit unit 21, which will be described in detail with reference to this figure. The wireless IC module 17 includes an antenna coil L1 (antenna coil 19) and a tuning capacitor C1.

Thus, the resonance frequency f1 is obtained. Similarly, the quasi-resonant circuit unit 21 also resonates at the resonance frequency f1 by the antenna coil L2 (antenna coil 22) and the tuning capacitor C2. Since the resonance frequencies of the antenna coils 19 and 22 are the same as f1, the degree of coupling between them is very strong. Here, the load R1 of the wireless IC module 17 is the IC chip 18, and the load R2 of the quasi-resonant circuit unit 21 is a resistance load corresponding to the IC chip 18. When the degree of coupling between the antenna coils 19 and 22 is increased, as shown in FIG. 3B, a so-called double-tuned action in which the resonance point is shifted to the left and right around the resonance frequency f1 works.

  When the personal authentication passbook 11 is opened, the wireless IC module 17 is not affected by the quasi-resonant circuit unit 21 because the degree of coupling between the antenna coils 19 and 22 is weak. The antenna gain at this time is G1. Next, when the personal authentication passbook 11 is closed, the degree of coupling between the antenna coils 19 and 22 becomes very strong, and the wireless IC module 17 is affected by the quasi-resonant circuit unit 21. The antenna gain at this time is G2. Since the gain decreases from G1 to G2, it is difficult to receive sufficient power from the external reading device, and communication cannot be performed. Accordingly, illegal access from the outside becomes difficult, which is very effective for preventing falsification and forgery of personal information.

  Further, even if the personal authentication passbooks 11 are inadvertently exposed to a strong magnetic field environment, excessive current is not induced in the wireless IC module 17 as long as the personal authentication passbooks 11 are closed. The destruction of the IC chip 18 of the wireless IC module 17 can be prevented.

Next, a second embodiment will be described.
FIG. 4 schematically shows a configuration of a personal authentication passbook according to the second embodiment. As shown in FIG. 4, the second embodiment is different from the first embodiment in that the area of the antenna coil 22 of the quasi-resonant circuit unit 21 is larger than the area of the antenna coil 19 of the wireless IC module 17. The number of turns of the antenna coil 22 of the quasi-resonant circuit unit 21 is made larger than the number of turns of the antenna coil 19 of the wireless IC module 17, and the antenna coil 19 of the wireless IC module 17 is connected to the personal authentication passbook 11. This is in the point that it is formed so as to enter the inside of the antenna coil 22 of the quasi-resonant circuit portion 21 when it is closed.

  Thus, the area of the antenna coil 22 of the quasi-resonant circuit unit 21 is made larger than the area of the antenna coil 19 of the wireless IC module 17, and the number of turns of the antenna coil 22 of the quasi-resonant circuit unit 21 is set to By configuring so that the number of turns of the antenna coil 19 is larger, the pseudo-resonance circuit unit 21 consumes most of the power from the external reading device when the personal authentication passbook 11 is closed. Become. For this reason, a counter electromotive force much larger than the counter electromotive force generated in the wireless IC module 17 is generated in the quasi-resonant circuit unit 21. Compared with the quasi-resonant circuit unit 21, the counter electromotive force generated in the wireless IC module 17 is very small, making it difficult to communicate with an external reader. Therefore, since unauthorized access from the outside becomes difficult, it is extremely effective for preventing falsification and forgery of personal information.

The schematic diagram which shows roughly the structure of the passbook for personal authentication which concerns on the 1st Embodiment of this invention. The schematic diagram which shows roughly the structure of the passbook for personal authentication which concerns on the 1st Embodiment of this invention. FIG. 4A is an equivalent circuit of a wireless IC module and a quasi-resonant circuit unit, and FIG. 4B is a diagram for explaining a double-tuned operation. The schematic diagram which shows schematically the structure of the passbook for personal authentication which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Passbook for personal authentication, 12 ... Cover (front cover), 13 ... Cover (back cover), 14 ... Page (sheet), 12a ... Print surface, 15 ... Face image (face photograph), 16 ... Ticket information, DESCRIPTION OF SYMBOLS 17 ... Wireless IC module, 18 ... IC chip, 19 ... Antenna coil, 20 ... Mounting board, 21 ... Pseudo resonance circuit part, 22 ... Antenna coil, 23 ... Circuit board, L1, L2 ... Antenna coil, C1, C2 ... Tuning Capacitors, R1, R2 ... load.

Claims (7)

An IC chip formed in a multi-page booklet and storing personal information related to the owner of the personal authentication passbook on a predetermined page and an antenna coil connected to the IC chip In the passbook for personal authentication in which a wireless IC module for wireless transmission and reception with an external device is embedded,
In a state where the passbooks for personal authentication are opened, the page having the plane of symmetry with the page in which the wireless IC module is embedded has an antenna coil and a load corresponding to the IC chip connected to the antenna coil. A passbook for personal authentication, characterized in that a quasi-resonant circuit unit configured and tuned to the same resonance frequency as the wireless IC module is embedded.   2. The personal authentication according to claim 1, wherein the antenna coil of the wireless IC module and the antenna coil of the quasi-resonant circuit unit are arranged to overlap each other when the personal authentication passbook is closed. Passbooks for use.   2. The personal authentication passbook according to claim 1, wherein the antenna coil of the quasi-resonant circuit unit has the same area and the same number of turns as the antenna coil of the wireless IC module.   The antenna coil of the wireless IC module and the antenna coil of the quasi-resonant circuit unit are wound so that the winding directions are opposite to each other when the personal authentication passbook is closed. 1. Passbook for personal authentication according to 1.   The passbook for personal authentication according to claim 1, wherein the area and the number of turns of the antenna coil of the quasi-resonant circuit unit are larger than the area and the number of turns of the antenna coil of the wireless IC module, respectively.   6. The antenna coil of the wireless IC module is disposed so as to be positioned inside the antenna coil of the quasi-resonant circuit unit in a state where the passbook for personal authentication is closed. Passbooks for personal authentication.   The passbook for personal authentication according to claim 1, wherein the page includes a front cover and / or a back cover.

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