JP2010204794A - Ic medium with display function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an IC medium with a display function that protects a display part from damage, and increases the area of the display part to the maximum. <P>SOLUTION: The IC medium with the display function is provided with: a base material 2, a display part 3 prepared on one side of the base material; and a contact terminal 4 connected to an IC chip capable of contact communication, the contact terminal being prepared on the side opposite to that where the display part is disposed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an IC medium such as an IC card, and more particularly to a multifunctional IC medium having a display function composed of liquid crystal, electronic paper, organic EL, or the like on the surface.

  With the development of card technology in recent years, IC media using IC chips with high security and a large amount of information that can be stored are used in various communication systems.

  Further, in recent years, with the CPU being mounted on the IC medium, the function has been advanced, and an IC medium having a display function has also appeared. A new method of using an IC medium using the display function has been proposed, and a wider field It is considered that an IC medium is used.

JP-A-01-218894

  However, in the case of an IC medium in which the contact terminal for the IC chip to communicate with the outside and the display unit are arranged on the same surface, when the IC medium is inserted into the reader / writer for contact communication, the communication of the reader / writer There is a problem that the display portion is damaged by the terminals.

  Further, as IC media with a display function are adopted in various fields, there is an increasing demand for IC media having a display area with a larger area. However, an IC medium in which a contact terminal and a display section are arranged on the same surface. However, it has been impossible to enlarge the display area beyond a certain area.

  The present invention has been made to solve the above-mentioned problems, and the object of the present invention is to provide an IC medium with a display function that protects the display portion from damage and maximizes the area of the display portion. There is to do.

  In order to solve the above-described problems, the present invention includes a base material, a display unit provided on one side of the base material, and a contact terminal connected to an IC chip capable of contact communication. However, the present invention provides an IC medium with a display function, wherein the IC medium is provided on the side opposite to the side on which the display portion is provided.

  Further, according to the present invention, the display unit and the control circuit are disposed at a position where they do not overlap in the thickness direction, and the contact terminal overlaps at least a part of the display unit and / or the control circuit in the thickness direction. This is an IC medium with a display function characterized by being provided at a position.

According to the present invention, there is provided an IC medium with a display function, wherein the contact terminal is provided at a position that does not overlap with the control circuit in the thickness direction but overlaps only with the display portion in the thickness direction. It is a thing.

  According to the present invention, the display unit and the contact terminal are disposed at a position where at least a portion thereof overlaps in the thickness direction, and the display portion and the control circuit are disposed at a position where at least a portion thereof overlaps in the thickness direction. Thus, an IC medium with a display function is provided.

  According to another aspect of the present invention, there is provided an IC medium with a display function, wherein the contact terminal and the control circuit are arranged at positions that do not overlap in the thickness direction.

  Since the present invention is configured as described above, the following effects can be obtained.

  In other words, the IC medium with a display function according to the present invention maximizes the area of the display unit by disposing the contact terminals for external communication on the surface opposite to the display unit of the IC medium. In addition, since the communication terminal of the reader / writer and the display unit do not come into contact with each other, it is possible to prevent the display unit from being damaged.

It is a block diagram of an IC medium with a display function in the present invention. It is a figure which shows one Example of IC medium with a display function in this invention. It is a figure which shows another example of embodiment of the IC medium with a display function in this invention. It is a figure which shows the example of embodiment which provided the solar cell in IC medium with a display function shown in FIG. It is a figure explaining the structure of the contact terminal in this invention. It is a figure which shows the embodiment example of the circuit film in this invention. It is a figure explaining the manufacturing method of the IC medium with a display function shown in FIG.

  Hereinafter, an IC medium with a display function according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of an IC medium with a display function according to the present invention.

  As shown in FIG. 1, the IC medium with a display function according to the present invention includes a contact terminal, a display unit, and a control circuit for controlling display on the display unit.

  The contact terminal is a part that communicates with an external reader / writer by contact. As shown in FIG. 6, the external terminal, the module substrate, and the IC chip are connected and laminated, and the IC chip part is made of resin if necessary. It is sealed. Moreover, it has an internal terminal for connection with a control circuit etc. The number of internal terminals may be appropriately determined depending on the number of terminals such as members to be connected.

  The IC medium and the external reader / writer can perform various communications such as operations such as writing and calling information to the IC chip and changing display contents of the display unit through the contact terminals.

  The display unit is a member capable of displaying various information such as a communication state of the IC medium, a communication result, information stored in the IC chip, and other information to be displayed. The information displayed on the display unit is not particularly limited in the present invention.

  As a display part, if it is a member which has display functions, such as a liquid crystal, electronic paper, and organic EL, it can utilize without being specifically limited. Since electronic paper can be displayed in a non-volatile manner, it is effective for suppressing the power required for the display when the IC medium is not particularly equipped with a power source or a battery.

  The control circuit controls display on the display unit, and a circuit corresponding to the type of display unit, information displayed on the display unit, display control method, and the like is formed and used. The control circuit may include a CPU, an IC chip, a memory, and the like as appropriate.

  The IC medium with a display function according to the present invention is provided with the above-described display portion on one side of a base material and the above-described contact terminals on the surface opposite to the side on which the display portion is provided. With this configuration, the display unit can be installed without limiting the area occupied by the display function-equipped IC medium. Further, even when an IC medium with a display function is inserted into an external reader / writer, the display unit is prevented from being damaged to the maximum by the reader / writer communication terminal that is in contact with the contact terminal.

  The substrate may be formed by appropriately selecting a material depending on the intended use of the IC medium, and synthetic resins such as PET, PETG, and PEN can be used alone or in combination, but are not particularly limited to these materials. .

  2A and 2B are diagrams showing another embodiment of the IC medium with a display function according to the present invention. FIG. 2A is a front view, FIG. 2B is a back view, and FIG.

  The IC medium with a display function shown in FIG. 2 is arranged at a position where the display unit and the control circuit do not overlap in the thickness direction, and the contact terminal is arranged at a position where it overlaps at least a part of the display unit and / or the control circuit. ing. For this reason, it is possible to ensure a large area occupied by the display unit with respect to the IC medium. Furthermore, the thickness of the display unit can be appropriately selected according to the thickness of the IC medium.

  Note that the contact terminal may be arranged at a position overlapping the display unit in the thickness direction or at a position overlapping the control circuit in the thickness direction. Since the thickness of the control circuit is large, it is desirable to dispose the contact terminal at a position overlapping the display portion in the thickness direction because the IC member can be made thinner.

  The control circuit is disposed on the circuit film. Fig.7 (a) is the surface (side by which the control circuit is arrange | positioned) of a circuit film, FIG.7 (b) is a figure which shows a back surface.

  The circuit film has a film as a base material, and as shown in FIG. 7, when laminated on an IC medium, a hole is provided in a portion corresponding to the contact terminal. In FIG. 7, the hole is provided through the film, but the surface side may be closed.

  As a film material, synthetic resins such as PET, PEN, and polyimide can be used. In particular, in consideration of heat resistance and positional accuracy of components to be laminated, polyimide can be preferably used. The thickness of the film is preferably 60 to 80 μm.

  Circuit wiring for connecting to the internal terminals of the contact terminals is provided on the back surface of the circuit film, which is electrically connected to the circuit wiring on the front surface via a conductive portion. The conduction part may form a through hole, or may be formed as a so-called caulking in which portions where circuit wirings on the front and back sides overlap are made conductive, or may be performed by laser welding or the like. The formation method is not limited as long as the wiring is conductive.

  The circuit wiring on the surface of the circuit film is arranged so as to connect the conduction portion and the control circuit, and also connect the control circuit and the display wiring. The circuit wiring may be a conductive wire having conductivity, or a conductive material may be provided by etching or printing. The display wiring is a conductive wire for connecting the display portion and the circuit film, and an appropriate display wiring determined from the type of the display portion or the like may be used as appropriate.

  Naturally, the shape of the arrangement is not limited to the shape shown in FIG. 7, and the position of the display wiring may be changed depending on the position where the display portion is provided, the terminal portion of the control circuit, and the like. The shape of the circuit wiring may be freely changed depending on the position of the display wiring.

  3A and 3B are diagrams showing another embodiment of the IC medium with a display function according to the present invention. FIG. 3A is a front view, FIG. 3B is a rear view, and FIG.

  The display-equipped IC medium shown in FIG. 3 is arranged at a position where the contact terminal and the control circuit do not overlap with each other in the thickness direction, and the display unit is at a position where at least a part thereof overlaps with the contact terminal and the control circuit in the thickness direction. Has been placed.

  With the configuration shown in FIG. 3, it is possible to secure the maximum occupied area of the display unit with respect to the IC medium, but it is necessary to use a display unit with a small thickness due to the limitation of the thickness of the IC medium. For example, since electronic paper is currently thin and about 0.2 mm, and organic EL is currently thin and about 0.05 mm, these can be suitably used. When the IC medium is an IC card, it is preferable that the thickness is set to 0.68 to 0.84 mm according to the standard.

  Next, an example of how to assemble the IC medium with a display function shown in FIG. 3 will be described with reference to FIG.

  First, the lowermost base material 21 is provided with holes having the same size as the external terminals of the contact terminals and the module substrate. The base material 21 has a thickness equivalent to that of the external terminal of the contact terminal and the module substrate.

  As described above, the circuit film laminated on the base material 21 is provided with a hole having the same size as the IC chip of the contact terminal or the IC chip sealed with resin. The hole may penetrate through the base material 22 or may not penetrate as long as it has a height sufficient to accommodate the IC chip portion.

  Therefore, the holes provided in the base material 21 and the circuit film are stacked so that the contact terminals can be fitted therein. And when a contact terminal fits in this hole, the internal terminal which a contact terminal has, and the circuit wiring provided in the back surface of a circuit film are connected.

  The substrate 22 to be laminated on the circuit film is laminated in order to make the unevenness of the surface of the circuit film flush. Although not shown, the side of the substrate 22 that contacts the circuit film is the circuit film. The shape follows the irregularities. Moreover, the hole part which penetrates the display wiring which connects a circuit film and a display part is provided. Alternatively, the substrate 22 may be solidified after being poured in a liquid form so that the unevenness on the surface of the circuit film is flush.

  And on the base material 22, the display part connected to the display wiring is laminated | stacked. The base material 23 to be laminated next is provided with a hole portion that can accommodate the display portion and the display wiring, and the base material 24 is provided with a hole portion having an area equivalent to that of the display portion. Thereby, the display wiring is not visually recognized from the surface of the IC medium, and only the display portion appears on the surface, and the IC medium with a display function is obtained.

  The base materials 23 and 24 may be a single integrated base material. In this case, only the display portion appears on the surface, and the display wiring connected to the display portion can be accommodated. It is preferable to provide a hole having a step. Alternatively, the base materials 23 and 24 may be solidified after being poured in a liquid state so that the display wirings are covered and only the display portion appears on the surface, similarly to the base material 22.

  Further, although not shown, a protective layer, a printed layer, a diffractive structure, a magnetic recording layer, and the like may be appropriately formed on the front and back surfaces, and may be freely designed.

  In addition, even when an adhesive is used for laminating these base materials and circuit films, known laminating methods such as thermal laminating, low-temperature fusing, and resin filling can be used, but the display unit is vulnerable to heat. For this reason, thermal lamination may be used until the previous step of laminating the display portion, but in the subsequent step, a method such as low-frequency fusion that can be laminated at a low temperature, a resin filling method, or the like may be employed.

  In addition, the manufacturing method of the IC medium with a display function in the present invention is not limited to the above-described method, and various manufacturing methods may be appropriately employed as long as the structure of the IC medium with a display function can be achieved. .

  FIG. 5 is a diagram showing an embodiment in which a solar cell is further provided on the side of the IC medium with a display function shown in FIG. 3 where the display unit is provided. The solar cell is connected to the circuit film. Accordingly, the display unit can be driven using the power obtained from the solar cell even when the reader / writer is not in communication.

  In the IC medium described above, an IC chip integrated with an external terminal for contact communication is used. However, if the external terminal and the IC chip are electrically connected, they are physically separated. Alternatively, an IC chip capable of both contact communication and non-contact communication may be used. In this case, as shown in FIG. 7B ', a non-contact communication antenna may be formed on the back surface of the circuit film by etching or the like. In addition to the contact terminal IC chip, a multi-chip type IC medium having an IC chip may be used, and this IC chip may be used for non-contact communication.

  Although not shown, the IC medium with a display function in the present invention may appropriately include an internal power supply, a rechargeable battery, and the like. Further, when a switch is provided and information is to be displayed on the display unit, the display unit may be turned on by pressing the switch.

DESCRIPTION OF SYMBOLS 1 ... IC medium with a display function 2, 21, 22, 23, 24 ... Base material 3 ... Display part 4 ... Contact terminal 5 ... Control circuit 6 ... Circuit film 7 ... -Display part wiring 8 ... Solar cell 9 ... External terminal 10 ... Module substrate 11 ... IC chip 12 ... Internal terminal 13 ... Film 14 ... Hole 15 ... Circuit Wiring 16 ... Conduction part 17 ... Non-contact communication antenna

Claims (5)

A substrate, a display unit provided on one side of the substrate, and a contact terminal connected to an IC chip capable of contact communication;
An IC medium with a display function, wherein the contact terminal is provided on a side opposite to the side on which the display portion of the substrate is provided.   The display unit and the control circuit are arranged at a position where they do not overlap in the thickness direction, and the contact terminal is provided at a position where the display unit and / or at least a part of the control circuit overlaps in the thickness direction. The IC medium with a display function according to claim 1.   3. The IC medium with a display function according to claim 2, wherein the contact terminal is provided at a position that does not overlap with the control circuit in the thickness direction but only overlaps with the display unit in the thickness direction. .   The display unit and the contact terminal are disposed at a position where at least a portion thereof overlaps in the thickness direction, and the display portion and the control circuit are disposed at a position where at least a portion thereof overlaps in the thickness direction. The IC medium with a display function according to claim 1.   5. The IC medium with a display function according to claim 4, wherein the contact terminal and the control circuit are arranged at positions that do not overlap in the thickness direction.

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