JP2011170738A - Ic card with display function, substrate for display, and data display method in ic card - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate the manufacturing of an IC card with a display function, and to provide a data display method suitable in the IC card with the display function or the like. <P>SOLUTION: The non-contact IC card 1A with the display function includes: a display part 5; an IC chip 2 for display control; a non-contact type IC chip 7 (IC chip for communication); and an antenna coil 6 (transmission I/F part), etc. An external input/output terminal of the IC chip 2 for display is connected to the antenna coil 6 exposed to the substrate surface of a non-contact communication substrate 13. Thus, the IC chip 2 for display control can acquire data outputted from the antenna coil 6 to the outside, and the substrate 11 for display and the non-contact communication substrate 13 can be developed as independent members, respectively. Especially, it becomes possible to utilize an existing antenna sheet etc. as it is for the non-contact communication substrate 13. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a wiring structure of an IC card having a display function and a data display method suitable for an IC card with a display function.

In recent years, an IC card body having a display function has been developed. For example, Patent Document 1 proposes a method of providing a non-contact IC card with a display device using ferroelectric liquid crystal.
Further, in Patent Document 2, in a contact / non-contact type IC card having a display function, an antenna for supplying power to a display unit is provided separately from an antenna for non-contact communication, and contact / non-contact is performed during non-contact communication. The contact IC chip obtains display data from an external IC card reader / writer, and outputs the display data from the contact / non-contact IC chip to the display CPU in a state where non-contact communication is interrupted. An IC card to be displayed is proposed.

  In such an IC card with a display function, display data to be displayed on the display unit is acquired from the communication IC chip. For example, in Patent Document 1, display data acquired by a communication IC chip (non-contact type IC chip) during communication with an external IC card reader / writer is directly passed to the display unit, and the display data is controlled by the control of the communication IC chip. Is displayed on the display. Further, for example, as disclosed in Patent Document 2, in an IC card with a display function including an IC chip for display control separately from an IC chip for communication, an I / O terminal of a contact / non-contact IC chip and display control are provided. There is a description that the CPU is connected.

Japanese Patent Laid-Open No. 10-154215 JP 2009-122877 A

  However, as in the above-mentioned Patent Document 2, when a communication IC chip and a display control CPU are connected to obtain display data, a display data output terminal (I / O terminal) is a communication IC chip. It is necessary to be provided in. Therefore, it is necessary to develop and manufacture a communication IC chip for an IC card with a display function separately from the communication IC chip used for an IC card having no display function. However, the standard of the communication IC chip has already been standardized, and it is difficult to change the standard. Therefore, there is a problem that it is desired to easily manufacture an IC card with a display function by using an existing communication IC chip as it is.

  The present invention has been made in view of such problems, and it is an object of the present invention to facilitate the manufacture of an IC card with a display function and to provide a data display method suitable for the IC card with a display function.

  In order to solve the above-described problem, a first invention is a communication IC chip that performs communication with an IC card reader / writer and executes data processing according to a stored program, and the communication IC chip is electrically connected. A transmission I / F unit that transmits data to the IC card reader / writer, a display unit provided in the IC card body, a display control IC chip that drives and controls the display unit, And a memory for storing data displayed on the display unit, wherein the display control IC chip is connected to the transmission I / F unit. It is.

According to the first invention, since the display control IC chip of the IC card with a display function is connected to the transmission I / F unit, it is transmitted from the communication IC chip to the IC card reader / writer via the transmission I / F unit. Data can be read out.
Therefore, the data in the communication IC chip can be acquired and displayed on the display unit without providing a display data output terminal on the communication IC chip. In addition, an existing communication IC chip, an antenna sheet, or the like can be used as it is for creating an IC card with a display function. As a result, there is no need to newly develop and manufacture a communication IC chip, so that manufacturing costs can be reduced and manufacturing time can be shortened.

The display control IC chip includes reading means for reading response data transmitted from the communication IC chip to the IC card reader / writer among data transmitted in the transmission I / F unit; and the response data It is desirable to include holding means for extracting predetermined data from the memory and holding it in the memory, and display control means for displaying the predetermined data held by the holding means on the display unit.
As a result, the data to be displayed on the display unit can be extracted from the response data transmitted from the communication IC chip to the IC card reader / writer, held in the memory, and displayed. Part or all of the data to be displayed can be used as display data.

The IC card main body further includes an operation unit that transmits an operation signal corresponding to a user operation to the display control IC chip, and the display control unit stores the predetermined data according to an operation from the operation unit. It is desirable to display on the display unit.
As a result, it is possible to display data on the display unit of the IC card at the user's preferred timing.

A detecting unit configured to detect a communication time between the IC card reader / writer and the communication IC chip; Is preferably displayed on the display unit.
This makes it possible to display data on the display unit when communicating with the IC card reader / writer for a predetermined time or longer, so that the display content can be updated at the timing of communication with the IC card reader / writer, which is practical. . It is also suitable from the viewpoint of power supply to the IC card.

It is desirable to further include a battery for supplying power to the display unit and the display control IC chip.
Accordingly, even when data is displayed on the display unit of the IC card in a place where there is no IC card reader / writer, it is possible to obtain power from the battery provided in the IC card.

  According to a second aspect of the present invention, there is provided a communication IC chip that performs communication with an IC card reader / writer and executes data processing according to a stored program, and is electrically connected to the communication IC chip. A display substrate superimposed on a communication substrate including a transmission I / F unit for transmitting data to a card reader / writer, the display unit, and a display control IC chip for controlling the display unit, A display substrate of an IC card with a display function, comprising: a connection portion for connecting a display control IC chip to the transmission I / F portion.

  According to the second aspect of the present invention, the display unit includes a display unit, a display control IC chip for controlling the display unit, and a connection unit for connecting the display control IC chip to the transmission I / F unit. By superimposing the substrate on the communication substrate, the display control IC chip and the transmission I / F unit can be brought into conduction via the connection unit. As a result, it is possible to easily manufacture an IC card with a display function by using a communication substrate or a communication IC chip of a conventionally used IC card as it is.

The display control IC chip includes reading means for reading response data transmitted from the communication IC chip to the IC card reader / writer among data transmitted in the transmission I / F unit; and the response data It is desirable to include display control means for extracting predetermined data from the data and displaying the data on the display unit.
As a result, data to be displayed on the display unit can be extracted from response data transmitted from the communication IC chip to the IC card reader / writer and displayed on the display unit. It becomes possible to use part or all of the display data.

  According to a third aspect of the present invention, there is provided a communication IC chip that performs communication with an IC card reader / writer and executes data processing according to a stored program, and is electrically connected to the communication IC chip. A transmission I / F unit for transmitting data to a card reader / writer, a display unit provided in the IC card body, a display control IC chip for driving and controlling the display unit, and data displayed on the display unit A data display method in an IC card in which the display control IC chip is connected to the transmission I / F unit, wherein the display control IC chip includes the transmission I / F unit. Reading the response data transmitted from the communication IC chip to the IC card reader / writer among the data transmitted in the Extracting a constant data, comprising the steps of holding in the memory, and a step to display the predetermined data stored in said display unit, a data display method in the IC card, which comprises a.

According to the third invention, the display control IC chip is connected to the transmission I / F unit, and the response data is transmitted from the communication IC chip to the IC card reader / writer via the transmission I / F unit. Data to be read and displayed on the display unit can be extracted and stored in the memory and displayed.
Thereby, in the IC card with a display function, part or all of the data output from the communication IC chip to the outside can be displayed as display data.

  According to the present invention, an IC card with a display function can be easily manufactured, and a data display method suitable for the IC card with a display function can be provided.

External configuration of non-contact IC card 1A with display function The block diagram which shows the internal structure of non-contact IC card 1A with a display function Cross-sectional view of contactless IC card 1A with display function The flowchart which shows the flow of the display process performed with IC chip 2 for display control External configuration diagram of a non-contact IC card 10A with a display function provided with a solar panel 8 and an operation unit 9 External configuration of contact IC card 1B with display function The block diagram which shows the internal structure of the contact type IC card 1B with a display function Cross-sectional view of contact IC card 1B with display function

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
[First Embodiment]
In the first embodiment, a non-contact type (non-contact IC card with display function 1A) of the IC card with display function 1 according to the present invention will be described.
FIG. 1 is a diagram showing an external configuration of a contactless IC card 1A with a display function, FIG. 2 is a block diagram showing an internal configuration of the contactless IC card 1A with a display function, and FIG. 3 is a contactless IC card with a display function. It is a figure which shows schematic sectional structure of 1A.

As shown in FIG. 1, the non-contact IC card with a display function 1 </ b> A is provided with a display unit 5 so that display contents are exposed on the surface of the card substrate 10. The display unit 5 can employ, for example, electronic paper, and displays display data such as characters and images.
Electronic paper includes, for example, one that is applied to a film substrate in which a matrix circuit is formed of cholesteric liquid crystal and passively driven, or one that uses an electronic powder fluid, and any of them may be employed. In the case of an electronic powder fluid, two-color display of black letters and white background is performed, and in the case of a cholesteric liquid crystal, two-color display or color display of green letters and black letters can be performed.

  Electric power consumption of electronic paper is performed only at the time of display rewriting, and the rewritten display screen can be held without power consumption, and the visibility of the display can be ensured. The display screen can be held for about 30 days under normal temperature (0 to 40 ° C.) and humidity (40 to 60%). The time required for rewriting one screen of electronic paper is within 10 seconds from the start of execution. Electronic paper can be rewritten 10,000 times or more.

  Further, in the non-contact IC card 1A with a display function, as shown in FIG. 2, a non-contact IC chip 7, an antenna coil 6 (transmission I / F unit) for non-contact communication, a display control IC A chip 2, a driver 3, a memory 4, and a display unit 5 are provided. Furthermore, you may provide the battery 8 as needed.

  In addition, as shown in FIG. 3, the non-contact IC card with display function 1A has a display substrate 11 and a non-contact communication substrate 13 as a central layer, and exterior films 15 and 17 are laminated on both sides thereof to form a card base. 10 is configured.

As described above, the electronic paper 5 (display unit 5), the display control IC chip 2, the driver 3, and the memory 4 are mounted on the display substrate 11.
The display control IC chip 2 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an EEPROM (Electronically Erasable and Programmable ROM), and an external interface (input / output ROM). It is connected to the memory 4, the driver 3, the battery 8, and the antenna coil 6 through an external interface. A display unit 5 is connected to the driver 3. Thereby, the display control IC chip 2 can drive the driver 3 to display the data held in the memory 4 on the display unit 5.

Of the external interface of the display control IC chip 2, a connection portion for connecting to the antenna coil 6 is formed by a conductive wire L1 or a bump described later. The conductor L1 or the bump of the display control IC chip 2 is formed at a position and a conductor length or a bump height that are in contact with the antenna coil 6 when the display substrate 11 and the non-contact communication substrate 13 are overlapped. The
The external dimensions of the display control IC chip 2 are about 7 mm × 7 mm, and the thickness of a commercially available product is about 1 mm. However, when used for the IC card 1 with a display function of the present invention, the back surface is polished to 300 μm. It is necessary to use it to the extent.

The driver 3 is a drive circuit for driving the display unit 5. Usually, it is provided integrally with the matrix wiring at the edge of the display unit 5. The external dimensions of the driver 3 are, for example, about 1.5 mm × 10.0 mm or 2.0 mm × 22.5 mm. Since the thickness is considerable, the back surface needs to be polished to about 300 μm in the same manner as the display control IC chip 2.
The memory 4 is a non-volatile semiconductor memory, and is composed of an EPROM (Erasable Programmable ROM), a flash memory, or the like. The memory 4 has a thickness of about 300 μm or less.

The non-contact communication substrate 13 is configured by disposing a non-contact type IC chip 7 on an antenna sheet on which the antenna coil 6 is formed. As the antenna sheet, an antenna sheet of any existing type non-contact IC card may be used. The antenna coil 6 is exposed on the surface of the antenna sheet and formed in a form that circulates in the surface. For forming the antenna coil 6, any of a winding method, a silk screen printing method, an etching method, a plating method, and the like may be used. Both ends of the antenna coil 6 are connected to the non-contact type IC chip 7.
The non-contact type IC chip 7 includes a CPU, a ROM, a RAM, and an EEPROM, communicates with an external IC card reader / writer 20, and executes data processing according to a program stored in the ROM.

  The non-contact type IC chip 7 usually has a plane size within 4.0 mm square and a thickness within about 200 μm, although depending on the function. Since the antenna coil 6 is exposed on the surface of the antenna sheet, a conductor L1 described later can be connected to any part of the antenna coil 6.

Next, with reference to FIG.2 and FIG.3, the wiring of non-contact IC card 1A with a display function is demonstrated.
As shown in FIG. 2, in the non-contact IC card 1A with a display function of the present invention, the display control IC chip 2 is connected to the antenna coil 6.
That is, the external interface (input / output terminal) of the display control IC chip 2 and an arbitrary portion of the antenna coil 6 are connected by the conductive wire L1 or the bump. Since both ends of the antenna coil 6 are connected to the non-contact type IC chip 7, data transmitted and received by the non-contact type IC chip 7 is transmitted during communication with the external IC card reader / writer 20.
As a result, the display control IC chip 2 can acquire data for the non-contact type IC chip 7 to communicate with the external IC card reader / writer 20.

The connection by the conducting wire L1 between the display control IC chip 2 and the antenna coil 6 is realized, for example, as in the example shown in FIG.
In the example of FIG. 3A, the antenna coil 6 and the display control IC chip 2 are formed by forming a through hole H1 through which the conducting wire L1 passes in a part of the display substrate 11, and passing the conducting wire L1 through the through hole H1. Connect to the external input / output terminal.

  Further, as shown in FIG. 3B, the surface of the display substrate 11 on which the display control IC chip 2 and the like are disposed faces the surface of the non-contact communication substrate 13 on which the antenna coil 6 is disposed. The antenna coil 6 and the external input / output terminal of the display control IC chip 2 may be connected to each other by a conductive wire L1 or a bump. In this case, each member is arranged so that the member on the display substrate 11 and the member on the non-contact communication substrate 13 do not overlap. In the example of FIG. 3B, it is not necessary to form the through hole H1 in the display substrate 11, and the display substrate 11 can be generated more easily.

  The layers of the exterior films 15 and 17, the display substrate 11, and the non-contact communication substrate 13 in FIG. 3 are filled with a liquid resin such as an epoxy or urethane after wiring, and are bonded and cured.

  The thickness of the exterior films 15 and 17 is about 100 μm. The display substrate 11 has a substrate portion thickness of about 50 μm, and the display control IC chip 2, driver 3, memory 4, and display portion 5 have a thickness of about 300 μm. The non-contact IC card substrate 13 has a substrate portion thickness of 50 μm, and the non-contact IC chip 7 has a thickness of about 200 μm. The convex portions of the display control IC chip 2, the driver 3, the non-contact type IC chip 7 and the like have a configuration in which a portion overlapping the upper portion is drilled to escape, and the laminated structure of the IC card 1 with a display function is 0.68 mm as a whole. To a thickness of 0.84 mm.

  As described above, the non-contact IC card 1A with a display function of the present invention has the antenna coil 6 (transmission I / F unit) in which the external input / output terminals of the display control IC chip 2 are exposed on the substrate surface of the non-contact communication substrate 13. ), The display substrate 11 and the non-contact communication substrate 13 can be developed as independent members. In particular, since the non-contact communication substrate 13 can use an existing antenna sheet as it is, it is possible to shorten the development period and the manufacturing period, and it is possible to reduce the manufacturing cost.

  In the non-contact IC card with a display function 1A configured as described above, the display control IC chip 2 receives data (response data) output from the non-contact type IC chip 7 and transmitted to the IC card reader / writer 20 from the antenna. Reading is performed by a conductive wire L1 connected to the coil 6. Further, the display control IC chip 2 extracts predetermined display data from the read response data and holds it in the memory 4. Then, the display control IC chip 2 drives the driver 3 at a predetermined timing to display data held in the memory 4 on the display unit 5.

Next, with reference to the flowchart of FIG. 4, the operation | movement regarding the display in non-contact IC card 1A with a display function is demonstrated.
When the user holds the contactless IC card 1A with a display function over the IC card reader / writer 20 and the contactless IC card 1A with a display function starts communication with the IC card reader / writer 20 (step S101; Yes), display control is performed. The IC chip 2 acquires response data from the antenna coil 6 (transmission I / F) (step S102). The response data is data transmitted from the non-contact type IC chip 7 to the external IC card reader / writer 20. Data transmitted from the external IC card reader / writer 20 to the non-contact type IC chip 7 is called a command.

  When the non-contact IC chip 7 receives a command from the external IC card reader / writer 20, it transmits response data corresponding to the command to the IC card reader / writer 20. The contents of data transmitted and received as commands and responses are determined according to the usage mode of the IC card, such as finance, transportation, settlement, and points. In the present embodiment, it is assumed that the data format is generated so that the response data includes data of contents to be displayed on the IC card 1 with a display function, such as the accumulated amount.

  The response data includes various data according to the command requested from the IC card reader / writer 20. In this example, the display control IC chip 2 extracts the accumulated amount data from the response data (step S103). Is held in the memory 4 (step S104).

  When the user stops holding the non-contact IC card with display function 1A over the IC card reader / writer 20 immediately after the start of communication, the communication is terminated (step S105; Yes), and the next communication start is awaited.

  When the communication between the non-contact IC card with display function 1A and the IC card reader / writer 20 continues (step S105; No), for example, when a predetermined time elapses such as 5 seconds or more (step S106; Yes), the display control IC The chip 2 controls the driver 3 to display the data (cumulative amount etc.) held in the memory 4 on the display unit 5 (step S107). When the contents of the display unit 5 are rewritten, the process returns to step S101, and the display control IC chip 2 waits for the start of the next communication.

  The above-described processing flow is an example suitable for the non-contact IC card 1A with a display function in which the battery 8 is not mounted. In the non-contact IC card with a display function 1A in which the battery 8 is not mounted, power is supplied to the display control IC chip 2 and the display unit 5 during communication with the IC card reader / writer 20. Therefore, for example, when the user holds the contactless non-contact IC card 1A with a display function over the IC card reader / writer 20 for a predetermined time or longer, the display control IC chip 2 is preferably controlled to display on the display unit 5.

  In the non-contact IC card with a display function 1A on which the battery 8 is mounted, the data held in the memory 4 can be displayed on the display unit 5 at an arbitrary timing. For example, like the IC card 10A shown in FIG. 5, the battery 8 and the operation part 9 are further provided in the non-contact IC card 1A with a display function shown in FIGS. The battery 8 drives the display control IC chip 2 and the driver 3 and is constituted by, for example, a solar battery. The operation unit 9 is configured by, for example, a touch sensor, detects a touch operation on the operation unit 9, and outputs an ON signal to the display control IC chip 2. The display control IC chip 2 displays data in the memory 4 on the display unit 5 in response to an ON signal input from the operation unit 9.

  As shown in the flowchart of FIG. 4, even when communication is not started (step S <b> 101; No), the display control IC chip 2 determines whether there is a touch operation on the operation unit 9, and there is a touch operation. In such a case (step S108; Yes), the cumulative amount stored in the memory 4 is displayed on the display unit 5 (step S107).

As described above, the contactless IC card with a display function 1A according to the first embodiment communicates with the IC card reader / writer 20 and performs data processing according to the stored program. IC chip 7, antenna coil 6 connected to non-contact IC chip 7 and serving as a data transmission path between IC card reader / writer 20 and non-contact IC card 1A, and display unit provided on card base 10 5 (electronic paper and driver 3), a display control IC chip 2 that drives and controls the display unit 5, and a memory 4 that stores data to be displayed on the display unit 5. The input / output terminal is connected to the antenna coil 6.
Then, the display control IC chip 7 reads the data transmitted to the antenna coil 6, extracts predetermined data such as the accumulated amount from the read data, holds it in the memory 4, and stores the data held at a predetermined timing. It is displayed on the display unit 5.

  As a result, the display control IC chip 2 can acquire display data from the data transmitted through the antenna coil 6, so that it is not necessary to provide a display data output terminal on the non-contact type IC chip 7. Therefore, the IC card 1 with a display function can be created by using the existing non-contact type IC chip 7 or the antenna sheet as it is.

  Further, the display control IC chip 2 determines the communication time between the IC card reader / writer 20 and the non-contact type IC chip 7, and when the communication for a predetermined time or more is detected, the data held in the memory 4 is stored. It is displayed on the display unit 5. In addition, when electronic paper is used for the display unit 5, the display content once rewritten has the property that the display state is maintained for a long period of time, so that the display content can be displayed even when it is not held over the IC card reader / writer 20. Can be confirmed.

  Further, when the operation unit 9 such as a touch sensor is further provided, the display control IC chip 2 causes the display unit 5 to display the data held in the memory 4 according to the operation from the operation unit 9. Is also possible. In this case, it is preferable to further include a battery 8 that supplies power to the display unit 4.

  In the above-described example, the data read from the antenna coil 6 and displayed on the display unit 5 is the accumulated amount, but is not limited thereto. For example, for IC cards used in transportation, the balance and charge history, etc. For IC cards used in financial institutions such as credit cards and cash cards, transaction history, scheduled settlement date, account balance, etc. In the case of a card, a point total, a point expiration date, an update history, etc. can be considered. In any case, as the response data output from the non-contact type IC chip 7 to the IC card reader / writer 20, a data format including these data needs to be formed.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
In the second embodiment, a contact type IC card 1 with a display function (contact IC card with a display function 1B) will be described among the IC cards 1 with a display function according to the present invention.
6 is a diagram showing an external configuration of a contact IC card 1B with a display function, FIG. 7 is a block diagram showing an internal configuration of the contact IC card 1B with a display function, and FIG. 8 is a contact IC card with a display function. It is a figure which shows schematic sectional structure of 1B.

  As shown in FIG. 6, the contact IC card with display function 1 </ b> B includes a display unit 5 on the surface of the card substrate 10, similarly to the contactless IC card with display function 1 </ b> A of the first embodiment. The contact IC card 1B with a display function includes a contact terminal 21 on the surface. The contact terminal 21 is formed with eight external connection terminals C1 to C8 based on the ISO standard. C1 is a circuit voltage terminal, C2 is a reset signal terminal, C3 is a clock signal terminal, C5 is a ground terminal, C6 is a program supply voltage terminal, C7 is a data input / output terminal, and C4 and C8 are spare terminals.

  As shown in FIG. 7, the contact IC card 1B with a display function includes a contact IC chip 23, a contact terminal 21 (transmission I / F unit), a display control IC chip 2, a driver 3, a memory 4, and A display unit 5 is provided.

  Further, as shown in the sectional view of FIG. 8, the contact type IC card 1B with a display function has the display substrate 29 and the contact communication substrate 25 as the central layers, and the exterior films 15 and 17 are laminated on both sides thereof. The card base 10 is configured.

  Similar to the display substrate 11 of the first embodiment, the electronic paper 5 (display unit 5), the display control IC chip 2, the driver 3, and the memory 4 are mounted on the display substrate 29. In FIG. 8, it is assumed that the memory 4 is disposed at different cross-sectional positions and is not shown. Since each part of the display unit 5, the driver 3, the memory 4, and the display control IC chip 2 is the same as that of the first embodiment, the description thereof is omitted.

A contact type IC chip 23 is connected to the back surface of the contact terminal 21. The connection structure of the contact terminal 21 and the contact type IC chip 23 may be the same as the conventional one. For example, as shown in FIG. 8, the terminals C1 to C8 of the contact terminal 21 are electrically connected to the terminals of the contact IC chip 23 by conducting wires L3 and L4 passing through the conduction holes H3 and H4 or a conductive adhesive. The
When the contact IC chip 23 is inserted into the IC card reader / writer 20, the contact IC chip 23 communicates with the IC card reader / writer 20 via the contact terminal 21, and data corresponding to the program stored in the contact communication IC chip 23. Execute the process.

Next, with reference to FIG.7 and FIG.8, the wiring of the contact type IC card 1B with a display function is demonstrated.
As shown in FIG. 7, in the contact type IC card 1 </ b> B with a display function of the present invention, the display control IC chip 2 is connected to the contact terminal 21.
That is, the input / output terminal of the display control IC chip 2 and the C7 terminal (data input / output terminal) of the contact terminal 21 of the contact IC card 1B with a display function are connected by the lead L2. Or you may connect conducting wire L2 to what is connected to C7 terminal (data input / output terminal) among conducting wires L3 and L4 which connect contact terminal 21 and contact type IC chip 23.
The contact IC chip 23 configures the data format so that display data is included in data input / output from the C7 terminal. As in the first embodiment, the display data is displayed on a display unit such as a cumulative amount, remaining amount, charge history, transaction history, settlement date, account balance, point total, point expiration date, update history, and others. It is assumed that the desired data to be displayed is included.

  As described above, in the contact type IC card 1B with a display function, the external input / output terminals of the display control IC chip 2 are connected to the spare terminals C4 and C8 already formed on the contact terminal 21. The IC chip 2 can acquire the data output from the contact IC chip 23 as display data.

The connection between the display control IC chip 2 and the contact terminal 21 is realized, for example, as in the example shown in FIG.
That is, as shown in FIG. 8, the surface of the display substrate 29 on which the display control IC chip 2 and the like are disposed faces the back side of the contact terminal of the contact communication substrate 25 and contacts the display control IC chip 2. The C7 terminal of the terminal 21 is connected by a conducting wire L2 or a bump. Alternatively, the conductor L2 or the bump is connected to the conductor L3 or L4 connected to the C7 terminal. The communication substrate 25 is formed with a conduction hole H3 through which the conducting wire L2 passes.

  As described above, the contact type IC card 1B with a display function is configured such that the display control IC chip 2 is electrically connected to the contact terminal 21 by using the lead wire L2. The substrate 25 can be developed as an independent member. In particular, it is possible to use an existing arbitrary type of contact communication substrate 25 as it is, and it is possible to shorten the development period and the manufacturing period, and to suppress the manufacturing cost.

The operation of the contact type IC card 1B with a display function of the second embodiment is the same as the operation of the contactless IC card 1A with a display function of the first embodiment.
That is, in the contact IC card 1B with a display function, the display control IC chip 2 connects the data (response data) output from the contact IC chip 23 and transmitted to the IC card reader / writer 20 to the contact terminal 21. Read out by the conducting wire L2. Further, the display control IC chip 2 extracts predetermined display data from the read response data and holds it in the memory 4. Then, the display control IC chip 2 drives the driver 3 at a predetermined timing to display data held in the memory 4 on the display unit 5.

As described above, the contact type IC card with display function 1B according to the second embodiment communicates with the IC card reader / writer 20 and executes data processing according to the stored program. IC chip 23, contact terminal 21 connected to contact IC chip 23 and serving as a data transmission path between IC card reader / writer 20 and contact IC card 1B with a display function, and display provided on card base 10 A display control IC chip 2 that drives and controls the display unit 5, and a memory 4 that stores data displayed on the display unit 5. The display control IC chip 2 is connected to the contact terminal 21. Is done.
Then, the display control IC chip 7 reads the data transmitted via the contact terminal 21, extracts predetermined data such as the accumulated amount from the read data, holds it in the memory 4, and holds it at a predetermined timing. Data is displayed on the display unit 5.

  Thereby, the display control IC chip 2 can acquire display data from the data transmitted by the contact terminals 21. Therefore, it is not necessary to provide a display data output terminal on the contact type IC chip 23. Therefore, the IC card 1 with a display function can be created by using the existing contact IC chip 23 and the contact communication substrate 25 as they are.

  Note that the cross-sectional structure of the IC card 1 shown in FIGS. 3 and 8 is an example, and the arrangement, wiring, and the like of each part are not limited to these examples.

  The preferred embodiments of the IC card with a display function and the like according to the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these are naturally within the technical scope of the present invention. Understood.

1 ... IC card with display function 1A ... Non-contact IC card with display function 1B ... Contact type IC card with display function 2 ... Display control IC chip 3 ... Driver 4 ... Memory 5 ... Display 6 ... Antenna coil 7 ... Non Contact type IC chips L1, L2... Conductive wire 10 ... Card base 11 ... Display substrate 13 ... Non-contact communication substrates 15 and 17 ... Exterior film 21 ... Contact terminal 23 ... Contact IC chip 25 ... Contact communication substrate 29 ... Display substrate

Claims (8)

A communication IC chip that performs communication with an IC card reader / writer and executes data processing according to a stored program;
A transmission I / F unit that is electrically connected to the communication IC chip and transmits data to the IC card reader / writer;
A display unit provided on the IC card body;
A display control IC chip for driving and controlling the display unit;
A memory for storing data to be displayed on the display unit,
The IC card with a display function, wherein the display control IC chip is connected to the transmission I / F unit. The display control IC chip is:
Reading means for reading response data transmitted from the communication IC chip to the IC card reader / writer among data transmitted in the transmission I / F unit;
Holding means for extracting predetermined data from the response data and holding it in the memory;
Display control means for displaying predetermined data held by the holding means on the display unit;
The IC card with a display function according to claim 1. The IC card body further includes an operation unit that transmits an operation signal corresponding to a user operation to the display control IC chip,
The IC card with a display function according to claim 2, wherein the display control unit displays the predetermined data on the display unit in response to an operation from the operation unit. A detecting means for detecting a communication time between the IC card reader / writer and the communication IC chip;
The IC card with a display function according to claim 2, wherein the display control unit displays the predetermined data on the display unit when communication for a predetermined time or more is detected by the detection unit.   The IC card with a display function according to claim 1, further comprising a battery that supplies power to the display unit and the display control IC chip. A communication IC chip that communicates with an IC card reader / writer and executes data processing according to a stored program, and is electrically connected to the communication IC chip, to the IC card reader / writer A display substrate that is superimposed on a communication substrate including a transmission I / F unit that transmits data,
A display unit;
A display control IC chip for controlling the display unit;
A connection unit for connecting a display control IC chip to the transmission I / F unit;
A display substrate for an IC card with a display function, comprising: The display control IC chip is:
Reading means for reading response data transmitted from the communication IC chip to the IC card reader / writer among data transmitted in the transmission I / F unit;
Display control means for extracting predetermined data from the response data and displaying the data on the display unit;
A display substrate for an IC card with a display function according to claim 6. A communication IC chip that communicates with an IC card reader / writer and executes data processing according to a stored program, and is electrically connected to the communication IC chip, to the IC card reader / writer A transmission I / F unit for transmitting data, a display unit provided in the IC card body, a display control IC chip for driving and controlling the display unit, a memory for storing data displayed on the display unit, A data display method in an IC card in which the display control IC chip is connected to the transmission I / F unit,
The display control IC chip is:
Of the data transmitted in the transmission I / F unit, reading response data transmitted from the communication IC chip to the IC card reader / writer;
Extracting predetermined data from the response data and holding it in the memory;
Displaying the stored predetermined data on the display unit;
A data display method comprising:

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