JP2005202710A - Uim reader/writer with liquid crystal display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To charge a secondary battery as a battery with an electromagnetic induction charger in a UIM reader/writer mountable with a contact/contactless dual interface UIM and having a liquid crystal display. <P>SOLUTION: The UIM reader/writer 1 with a liquid crystal display, which is mounted with a removable UIM having contact and contactless interfaces specified by ISO 7816-2 and ISO 7816-3 and by ISO 14443 respectively, has the liquid crystal display, a winding antenna coil for contactless communication, a contact terminal plate, and the secondary battery used for the display and drive of the liquid crystal display. The secondary battery can be charged with an electromagnetic induction charger via the antenna coil except when the UIM reader/writer with the liquid crystal display establishes contactless communication with an external device. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention is a UIM reader / writer having a liquid crystal display and a UIM having both contact and non-contact functions detachably attached. In particular, a secondary battery for displaying and driving a liquid crystal display is of an electromagnetic induction type. The present invention relates to a UIM reader / writer that can be charged by a charger.
Such a UIM reader / writer can be used first for settlement transactions such as contactless gate management and contactless shopping for facilities, transportation facilities, etc., and secondly, various information can be displayed on a liquid crystal display. It can be suitably used for a medium that requires such information display, for example, a record display of various transactions, a commuter pass, a boarding ticket, various facility admission tickets, and the like. Furthermore, if a USB connector is provided, it can also be used for access authority authentication applications such as a personal computer (PC).

In recent years, an IC card having a contact defined by ISO 7816-2 and ISO 7816-3 and a non-contact interface defined by ISO 14443 has been put into practical use.
On the other hand, a dual interface IC card with USB (Universal Serial Bus) contact has been developed (Patent Document 1). An IC card having a USB interface facilitates connection with a USB compatible device such as a personal computer, and has begun to attract attention as an ID card for network access such as an employee ID card.

On the other hand, security ID modules called small SIMs, UIMs, and USIM cards have been incorporated in mobile phones, and they have already been put into practical use by being incorporated in the latest mobile phones in Japan.
A UIM (User Identity Module) is a small IC card in which contractor information issued by a mobile phone company is recorded, and is incorporated into a mobile phone and used to identify a user. For example, a UIM is considered to be inserted into an American cdma2000 mobile phone and receive an international roaming service.

The applicant of the present application has previously proposed a SIM holder with a USB connector having a contact defined in ISO 7816-2 and ISO 7816-3 and a non-contact interface of ISO 14443 in Patent Document 2.
Patent Documents 3 and 4 propose a SIM reader / writer with a liquid crystal display.

5A and 5B are diagrams illustrating a SIM reader / writer with a liquid crystal display, in which FIG. 5A is a perspective view and FIG. 5B is a cross-sectional view taken along line AA in FIG.
As shown in FIG. 5A, the SIM reader / writer 1S with a liquid crystal display has a liquid crystal display 4 on the surface of the main body, and can display various information held by the SIM2. In addition, the USB connector 20 is provided on the left side, and the insertion slot 15 for the SIM 2 is provided on the right side. The SIM 2 can be inserted from the insertion port 15 along the step portion 16. If the USB connector 20 is provided, access authority authentication can be performed by inserting the USB connector 20 into a PC or the like with the SIM 2 mounted, and data is exchanged with the PC after authentication.
The LED display 14 indicates whether or not the power is on, and the switch buttons 41 and 42 are used for power on / off, display selection, operation determination, and the like.

As shown in FIG. 5B, the SIM 2 inserted from the right side of the reader / writer is fixed to the lower side of the R / W (reader / writer) terminal board 12. Usually, the SIM reader / writer 1S is composed of an upper lid portion 18 and a lower case portion 19, and has an antenna coil and a battery for non-contact communication therein, which are not shown. The antenna coil is connected to the C4 and C8 terminals of the contact terminal plate 2t of the SIM through the terminal plate 12.
The UIM reader / writer with a liquid crystal display of the present invention also has the same appearance and function as the SIM reader / writer 1S of Patent Document 4.
In this specification, UIM that is increasingly used than SIM is used as the name of the invention, but UIM has the same function as SIM. Therefore, in this specification, UIM is a generic term for small IC cards including SIMs and USIMs (Universal SIMs).

The UIM reader / writer of the present invention is characterized in that the battery is charged without a terminal by an electromagnetic induction method. Regarding such a charging method, there are prior documents such as Patent Documents 5 to 8. Patent Document 5 relates to a non-contact IC card using a primary battery (dry battery) and a capacitor as a power source, and attempts to charge the capacitor in a non-contact manner.
Patent Document 6 relates to a “rechargeable non-contact IC card system” and proposes a system that takes out electric power from AC magnetic field energy and charges a rechargeable battery.
Patent Document 7 proposes a non-contact type IC card that detects whether or not the electric power obtained from the antenna coil is movable as an IC card and switches the operating state with respect to the “non-contact type IC card”. Patent Document 8 relates to “electromagnetic induction charging device, electronic device to be charged, and electric toothbrush”.

JP-T-2002-525720 Japanese Patent Application No. 2002-284825 Japanese Patent Application No. 2003-046656 Japanese Patent Application No. 2003-0466657 JP-A-8-69513 JP-A-10-307898 JP 2000-90221 A JP-A-9-19078

As described in Patent Documents 5 to 8, there are many terminalless charging techniques in the fields of non-contact type IC cards, electric toothbrushes, watches, etc., but as in the present invention, a UIM reader with a liquid crystal display. There is no example applied to a writer.
In the case of a non-contact type IC card, the opportunity to communicate with an external non-contact communication device is limited to a very short time, and during that time, it is practically difficult to charge enough power to be used for liquid crystal display display. it is conceivable that. Especially in the case of a small card such as UIM, efficient charging is even more difficult even if a minute antenna is provided in the card.
Therefore, in the case of a UIM reader / writer, generally, a primary battery such as a dry battery is used as a power source, or a secondary battery is used and charged by an AC adapter.

However, when a primary battery is used, frequent battery replacement is required, which causes environmental problems due to disposal of used batteries. In the case of an AC adapter, there is a problem that it is heavy and bulky and inconvenient to carry and expensive, and a UIM reader / writer needs a charging terminal. Since the terminal for charging is exposed to the outside, there is a problem that contact failure occurs due to contamination, oxidation, corrosion, friction, breakage, etc. of the contact portion of the terminal.
Therefore, the inventors of the present application charge a battery (secondary battery) by an electromagnetic induction method using a wire antenna coil provided in a UIM reader / writer with a liquid crystal display without using a primary battery or an AC adapter. It has been researched and the present invention has been completed.

  The gist of the present invention for solving the above problems is that a UIM having a contact defined by ISO 7816-2 and ISO 7816-3 and a non-contact interface defined by ISO 14443 is detachably mounted. 2) In a UIM reader / writer having a non-contact communication wire antenna coil, (3) a UIM contact terminal plate, and (4) a secondary battery used for displaying and driving the liquid crystal display. The secondary battery is made rechargeable by an electromagnetic induction charger via the wire antenna coil when the UIM reader / writer with a liquid crystal display is not in contact with an external device. And a UIM reader / writer with a liquid crystal display.

  In the above, when charging the UIM reader / writer with a liquid crystal display, it is preferable that the UIM non-contact interface connection is disconnected by operating the changeover switch. The UIM reader / writer with a liquid crystal display may include a USB connector.

The UIM reader / writer with a liquid crystal display of the present invention is provided with a wire antenna coil for ISO 14443 non-contact communication function, and a secondary battery is obtained by electromagnetic induction using the antenna coil using a dedicated charger. It can be charged for a long time, so the liquid crystal display can display for a long time.
Since the UIM reader / writer with a liquid crystal display of the present invention does not require a connection cord or a charging terminal when charging, disconnection or poor contact does not occur.
In addition, since the charging terminal is not used, charging can be performed even in an environment that easily gets wet. Furthermore, there is no corrosion or malfunction caused by dirt or wetness of terminals.
If the charging and non-charging states can be separated by operating the changeover switch, it is not necessary to employ a complicated circuit configuration that charges excessive current during non-contact communication, simplifying the circuit. it can.

A UIM reader / writer with a liquid crystal display of the present invention (hereinafter referred to as “UIM reader / writer”) will be described with reference to the drawings.
FIG. 1 is a block diagram of a UIM reader / writer according to the present invention, FIG. 2 is a diagram showing a circuit configuration when connected to a charger, and FIG. 3 is a diagram showing a state in which the UIM reader / writer is charged by a charger. 4 is a diagram showing a display example of a liquid crystal display.

  As shown in FIG. 1, a UIM reader / writer 1 according to the present invention has a control IC chip 3 that is detachably mounted on a UIM 2 and controls the UIM reader / writer. The control IC chip 3 has a CPU and a memory, and also has an ISO 7816 driver 31 and a liquid crystal driver 32 for driving a liquid crystal display. However, not all of these are integrated into an IC chip. The UIM 2 signal is connected to the control IC chip 3 via the UIM contact terminal plate 12 and the relay 8.

  When the UIM reader / writer has a USB connector, it can be connected to a USB port 30 such as a PC. The USB connector includes two data pins (D +, D−), a power pin 23 and a ground pin 24. The two data pins are connected to the USB7816 conversion IC 10 and the signal is transmitted to the control IC chip 3 via the USB / ISO7816 conversion IC10 and the relay 8. Bus power is supplied from the power pin 23. That is, when the USB connector is connected to a PC or the like, the driving power can be supplied from the PC or the like.

The UIM contact terminal plate 12 has a structure connected to 8 terminals of the contact terminal plate 2t provided in the UIM2. In the UIM contact terminal plate 12, C4 and C8 terminals, which are spare terminals, are connected to the wire antenna coil 11 in the casing of the UIM reader / writer.
The antenna coil 11 is for performing non-contact communication in conformity with ISO14443 Type A, B. Thereby, even when UIM2 itself does not have an antenna coil, non-contact communication can be performed through the antenna coil 11.
The UIM reader / writer 1 includes a battery (secondary battery) 7 as a drive power source for the liquid crystal display 4 and the control IC chip 3. As the battery 7, a lithium ion battery or a lithium polymer battery can be preferably used. If it is a lithium secondary battery, since the voltage of about 3.3-3.5V can be supplied, it is preferable in the electric power supply which drives an IC chip.

  The wire antenna coil 11 is for performing non-contact communication as described above. However, the UIM reader / writer 1 of the present invention has a feature of serving as a power receiving coil when charging from a charger at the same time. The UIM reader / writer 1 has a changeover switch 9. When the antenna coil 11 is used for charging, the non-contact interface of the UIM 2 is disconnected and connected to the battery 7 via the charging control circuit 6. At the time of non-charging normal state, it is connected to UIM2. The change-over switch 9 may be one that is artificially changed, but is preferably one that is switched to be connected to the battery 7 structurally or electrically automatically only when used in a charger.

The switch button 41 is used for power on / off, and the switch button 42 is used for display selection and operation determination. The liquid crystal display 4 sequentially displays information held by the IC chip of the UIM 2 by operating the switch button 42.
As the liquid crystal display 4, a dot matrix type reflective color liquid crystal display can be adopted, and a graphic display is also possible. The thickness of the liquid crystal display 4 is about 1.0 mm to 1.5 mm. The display area can be from about 20 to 30 mm in width to about 40 to 70 mm in length.

When the UIM reader / writer 1 is connected to the charger 5, it becomes as shown in FIG.
The charger 5 uses a commercial power supply, and includes, for example, a power supply unit 51, an electromagnetic induction circuit 52, a timer 53, and a main body detection means 54. The main body detection means 54 is means for detecting that the UIM reader / writer 1 as the main body is mounted, and the timer 53 is reset by a detection signal of the main body detection means and starts and operates for a set time. Send the signal to the electromagnetic induction circuit. The electromagnetic induction circuit 52 includes a transformer and a feeding coil 55 and generates an alternating magnetic field while receiving an operation signal.

  When connected to the charger 5, the changeover switch 9 is turned off from the UIM contact terminal plate 12, so that the feeder antenna coil 11 is connected to the charging control circuit 6. The antenna coil (receiving coil) 11 detects an alternating magnetic field radiated from the charger 5 and generates an alternating voltage. In the charging control circuit 6, the alternating current obtained by the antenna coil 11 is stored in the secondary battery 7.

When charging is started, an AC voltage is induced in the power receiving coil (coiled antenna coil 11) of the UIM reader / writer 1. The battery 7 is charged via the charging control circuit 6 with the alternating current of the power receiving coil. The charging control circuit 6 includes a rectifier 61 that rectifies alternating current, and a battery charger 62 that satisfies the charging condition of the battery 7 using direct current obtained by rectification.
When the UIM reader / writer 1 is detached from the charger 5, the main body detection means 54 of the charger 5 detects the attachment / detachment and turns off the power.
The battery 7 is connected to a charge detection unit 13 (see FIG. 1), detects the charge amount by voltage (may be other elements), and sends a signal corresponding to the charge amount to the control IC chip 3. And displayed on the liquid crystal display 4.

When the UIM reader / writer 1 communicates with an external reader / writer (not shown) to obtain a signal during non-charging, the changeover switch 9 is normally connected to the UIM contact terminal plate 12. In this case, the received signal is transmitted to the UIM 2 via the UIM contact terminal board 12.
The UIM 2 includes a receiving unit 2r that converts a signal into data, a microprocessor 2m that stores and processes the converted data in a memory, and a transmitting unit 2s that converts and transmits data generated by the microprocessor 2m. And perform the necessary processing.

FIG. 3 is a diagram illustrating a state in which the UIM reader / writer is charged by a charger. FIG. 3A is a perspective view, FIG. 3B is a perspective view from a plane, and FIG. It is an AA line schematic sectional drawing of FIG. 3 (A).
The UIM reader / writer 1 with a liquid crystal display includes an upper lid portion 18 and a lower case portion 19 formed by injection molding of polycarbonate resin or the like. The UIM 2 is inserted from the insertion port 15 opened between the upper lid portion 18 and the lower case portion 19 and stopped at the lower surface of the contact terminal plate 12, and the contact pin of the contact terminal plate 12 and the contact terminal 2 t of the UIM 2 come into contact with each other. .
Although the antenna coil 11 can be wired along the inner periphery of the upper lid portion 18 and the lower case portion 19 of the casing, in the case of FIG. 3, in order to increase the degree of coupling of the charger 5 with the power supply coil 55, the charger 5 Is provided in the lower case portion 19 in contact with.

For example, the wire antenna coil 11 is arranged in a rectangular ring shape on the lower surface of the circuit board 17 of the UIM reader / writer 1. The antenna wire is a coated copper wire having a diameter of about 0.3 mm and can be wound about 8 times (8 turns).
It is preferable that the corresponding feeding coil 55 on the charger 5 side has a shape that surrounds the power receiving coil (antenna coil 11) in order to increase the degree of coupling between the coils.

When charging the UIM reader / writer 1 with the charger 5, the UIM reader / writer 1 is placed on the charger 5 as shown in FIG. 3. The UIM 2 may not be attached.
The charger 5 is provided with a recess so as to fit the UIM reader / writer 1 at a depth of about 1 to 2 mm. When the UIM reader / writer 1 is fitted into the recess, the feeding coil 55 is inserted. And the antenna coil (power receiving coil) 11 are closest to each other.
In this state, if a commercial power supply is turned on to the power supply unit of the charger 5, an electromagnetic wave is radiated from the feeding coil 55, the feeding coil and the receiving coil are electromagnetically coupled, and an AC voltage is induced in the receiving coil (wire antenna coil 11). The

Although 13.56 MHz is adopted as the communication frequency of the non-contact IC card, a different frequency may be adopted at the time of charging.
Since the driving voltage of components has been reduced in accordance with the recent trend of lower power consumption, about 3.3V is secured as the supply voltage for the control IC chip 3, the liquid crystal display 4, and other system loads. That's fine.

FIG. 4 is a diagram illustrating a display example of the liquid crystal display. The display of FIG. 4 is a menu selection screen, and (1) Edy (electronic money) balance, (2) Safety Pass ticket, and (3) Safety Pass balance can be selected.
The remaining amount 4b of the battery is arranged at the top. The remaining amount is displayed in a rectangular shape inside the battery-shaped frame, but when the charge detection unit detects that the remaining amount is low, the display can blink to prompt charging. . In addition, the charging progress can be displayed during charging.

It is a block diagram which shows the example of the UIM reader / writer of this invention. It is a figure which shows the circuit structure at the time of connecting to a charger. It is a figure which shows the state which charges a UIM reader / writer with a charger. It is a figure which shows the example of a display of a liquid crystal display. It is a figure which shows the SIM reader / writer with a liquid crystal display.

Explanation of symbols

1 UIM reader / writer 2 UIM, SIM
2t contact terminal board 3 IC chip for control 4 Liquid crystal display 5 Charger 6 Charge control circuit 7 Battery (secondary battery)
8 Relay 9 Changeover switch 10 USB / ISO7816 conversion IC
11 Antenna coil (receiving coil)
12 UIM Contact Terminal Board 13 Charge Detection Unit 15 Insertion Port 17 Circuit Board 18 Upper Cover Part 19 Lower Case Part 20 USB Connector 23 Power Pin 24 Earth Pin 30 USB Port 41, 42 Switch Button

Claims (3)

A UIM having a contact defined by ISO 7816-2 and ISO 7816-3 and a non-contact interface defined by ISO 14443 is detachably mounted.
(1) a liquid crystal display; (2) a contactless antenna antenna coil for contactless communication; (3) a contact terminal board for UIM; and (4) a secondary battery used for displaying and driving the liquid crystal display. If the UIM reader / writer with a liquid crystal display is not in contactless communication with an external device, the secondary battery is charged by an electromagnetic induction charger via the wire antenna coil. A UIM reader / writer with a liquid crystal display characterized by being enabled. 2. The UIM reader / writer with a liquid crystal display according to claim 1, wherein when the UIM reader / writer with a liquid crystal display is charged, the non-contact interface connection of the UIM is disconnected by operating a changeover switch. The UIM reader / writer with a liquid crystal display according to claim 1, further comprising a USB connector.

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