JP2004127279A - Non-contact ic chip mounting body and its display unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate bad influence such as deflection of a resonance frequency due to electromagnetic connection between an electrode or a conductive layer, which is used in a display part capable of rewriting information display by impression of voltage, and an antenna of an RFID. <P>SOLUTION: This non-contact IC chip mounting body is provided with a display unit 1 having a display part 2, which can rewrite the information display by impression of a voltage, and an RFID unit 6 having a circuit part including an antenna circuit 7. Since the display part 2 and the circuit part are arranged not to be overlapped by each other, no bad influence occurs. <P>COPYRIGHT: (C)2004,JPO

Description

(4) The present invention relates to a non-contact IC chip mounted body. More specifically, the present invention relates to a non-contact IC chip mounted body including a display unit having a display unit, an RFID (Radio Frequency Identification) (RFID) unit using an IC chip and an antenna. Further, the present invention relates to a display unit obtained by removing the RFID unit from the package.

In recent years, RFID such as IC cards and IC tags that can exchange data without contact has been put into practical use. Membership cards, identification cards, railway commuter passes and prepaid cards have been developed using electronic information embedded in IC chips. Has begun to be used in a wide range of applications, such as air baggage management.

However, since electronic information such as the balance of a prepaid card, which is embedded in an IC chip, cannot be confirmed directly by the five senses, it must be inserted into a card reader and confirmed. Further, for commuter pass applications, rewrite printing by leuco thermal method has been put to practical use on the face of a ticket. However, there is no sufficient durability, and the number of practical rewriting is limited to 100 at most, and it is not suitable for constant rewriting such as displaying the balance of a prepaid card.
One method for solving the above problems is a card using a liquid crystal / polymer composite film (for example, see Patent Document 1).
JP-A-7-306398 (page 2-3, FIG. 1)

(4) In order to solve the above problems, in addition to the cards using these liquid crystal / polymer composite films, the present inventor tried to use so-called electronic paper for displaying a non-contact IC chip mounted body.

A display unit having a display portion over which information can be rewritten by applying a voltage; and an RFID unit having a circuit portion including an antenna circuit, wherein the display portion and the circuit portion are arranged without overlapping. In the contact IC chip mounted body, by arranging the display unit and the antenna circuit of the RFID unit so as not to overlap with each other, it is possible to reduce the influence of the communication radio waves and the noise radio waves generated from the display unit and the like. Thus, suitable electronic paper and RFID can be freely combined according to the application, and the electronic paper and RFID can be operated at the same time, and the time required for operation can be shortened.
Further, by disposing the antenna circuit around the periphery of the display portion, the opening area of the antenna circuit can be made larger, so that it is possible to combine a higher sensitivity RFID unit with a relatively smaller projection area.
In addition, since a sufficient distance is provided between the IC chip mounted in the RFID unit and the display unit, it is possible to prevent image information on the display unit from deteriorating due to heat generated by the operating IC chip.

The display unit is constituted by electronic paper described later.
Since the display unit and the RFID unit are held by the integrated support member, it can be stably handled like a panel.
The display unit and the RFID unit are detachably combined. Therefore, the display unit can be used as an IC card holder or an IC tag holder. By using this, it is possible to combine electronic paper with an existing IC card or the like, and it is possible to easily add an electronic display function to an already constructed IC card system, RFID medium system, or the like as necessary. Become.

It is preferable that the display unit is an electronic paper of a type in which information is rewritten by information projection from the information projection unit in a state where a voltage is applied to the electrodes, in order to contactlessly communicate information between the units. Here, light includes ultraviolet light, infrared light, electromagnetic waves, and the like in addition to visible light.
The display unit has a trigger signal receiving means, and the trigger signal receiving means receives the trigger signal and starts a rewriting operation of the display unit. The trigger signal receiving means is a means independent of the RFID unit and for generating an electric signal upon receiving a specific trigger signal from the outside.
By using at least a part of the information light from the information projection means as a trigger signal, it is not necessary to provide a trigger signal transmission unit.

The fact that the display unit has a power supply for driving means that a power supply for applying a voltage for rewriting information display is built-in, which makes it necessary to connect a driving power supply from the outside when rewriting electronic paper. This is particularly effective when combined with a non-contact RFID unit, which enables communication without performing electrode contact or the like.
When the display on the display unit substantially includes at least the display based on the presence or absence of color, and when the access time between the non-contact IC chip mounted body and the reader / writer terminal is short in a use such as a commuter pass, the approximate remaining amount is colored. Can be easily displayed depending on the presence or absence of.

By displaying a barcode or a two-dimensional barcode on the display unit, it becomes possible to mechanically read information such as the contents and history of luggage and goods.
By displaying all or a part of the information stored in the RFID unit in a visible manner on the display unit, the internal information of the RFID can be easily confirmed.
The display unit in which the RFID unit is detachable from the non-contact IC chip mounted body and in which the RFID unit can be detached can be connected to an existing IC card, tag, or the like so that the internal information can be easily checked.

An electrode or a conductive layer used in a display portion in which information display can be rewritten by applying a voltage is electromagnetically coupled to an RFID antenna, and there is no adverse effect such as a shift in resonance frequency.
Noise is generated by the voltage application at the time of rewriting the electronic paper, and the problem that the RFID antenna picks up the noise and the IC chip malfunctions does not occur.

In the present specification, the electronic paper includes a transparent electrode, a metal electrode, and a conductive layer on at least one surface of a display layer.By applying a voltage to these electrodes, the optical characteristics of the liquid crystal are changed, or a solid or liquid The contrast is formed by attracting the charged particles to the electrodes or rotating the black and white particles so that the display can be freely rewritten. Unlike a normal liquid crystal display or a CRT, a self-luminous light source is not built in, and a backup power supply for maintaining a display is not required. The form of display can be both transmission light and reflection light.
Further, unlike the conventional leuco heat-sensitive rewrite, the thermal head or the erasing roll does not physically come into contact with the display surface, and the system has no movable parts, so that the reliability is high. The electronic paper referred to in the present invention includes a device that externally applies an electromagnetic wave such as light while the voltage is being applied as an image driving unit.

Some of these electronic papers have tens of thousands of rewrites, and do not require a power source except when rewriting images. Therefore, they do not consume power except during rewriting, so they are suitable as RFID display media. is there.
However, electronic paper requires voltage application during rewriting, so transparent electrodes such as ITO (indium tin oxide), ATO (antimony tin oxide) and nesa film (conductive SnO ₂ film), and PDP (plasma display) Impedance changes due to opaque metal (mainly silver and copper etc.) thick film, metal (aluminum, copper or chromium / copper / chromium three-layer structure etc.) thin film used for bus electrodes, and light reception A photoconductive layer is required. It has been discovered that these conductive layers have the following adverse effects: (1) Interaction, such as formation of a capacitor at a portion where the conductive layer and the RFID antenna circuit overlap, electromagnetic coupling and a resonance frequency shift, so that the communication distance does not increase. In the case of a large conductive layer that covers the antenna, the conductive layer becomes a shield and communication becomes impossible. (2) Noise is generated by voltage application at the time of electronic paper rewriting, and the noise is picked up by the RFID antenna and the IC chip malfunctions. In the worst case, the IC chip is destroyed. In order to solve the above problems (1) and (2), optimize the resonance frequency in terms of antenna design, layer configuration, etc., assuming a specific combination of electronic paper and RFID, or rewrite electronic paper and RFID communication May be shifted, but there are problems that the combination of the electronic paper and the RFID is limited and that the time required for the operation becomes long.

(3) When the IC chip mounted on the RFID and the electronic paper unit are close to each other, there is a case where a problem occurs in that the image of the electronic paper unit is thermally deteriorated due to the heat generated by the operating IC chip.
An object of the present invention is to provide a non-contact IC chip package that solves these problems.

ＲＦRFID in the present invention is mainly formed of a circuit portion including an IC chip on which electronic information is recorded and an antenna circuit bonded to the IC chip. In RFID, when the antenna receives a specific electromagnetic wave from an external reader / writer, power is supplied to the IC chip by an electromagnetic induction effect or an electrostatic coupling effect, and electronic information corresponding to a system mounted on the IC chip is transmitted. The exchange is performed between the RFID and the reader / writer by an electromagnetic wave. In the present specification, the RFID is similar to a medium generally called a non-contact IC card or a non-contact IC tag, and includes a combination type IC card and the like.

The electronic paper unit referred to in the present invention can also be called a display unit, and generally has an electrode such as a transparent electrode or a conductive layer on at least one surface, a display unit using various methods described below, a control circuit for controlling display, It is composed of terminals for power supply and signal input.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of an example of a non-contact IC chip mounted body according to the present invention. In this embodiment, image information can be transferred from various projectors, CRTs, and the like to electronic paper. An example in which electronic paper of a type using a liquid crystal light scattering mode described later is used will be described. The display unit 1 includes the following units. The display unit 2 includes a cholesteric liquid crystal layer, a photoconductive layer, a transparent electrode, and the like. The control circuit 3 has a timer function based on a signal from the trigger receiving unit 4 as a trigger signal receiving unit and a function of applying a pulse voltage to the transparent electrode and the photoconductive layer of the display unit 2 after waiting for a predetermined time. The display unit 2 is controlled. The driving power supply 5 supplies power for driving the display unit 2 via the control circuit 3. A battery or external power supply is used. The trigger receiving section 4 is an element configured by an infrared light receiving section or the like, and detecting a trigger signal transmitted from the trigger transmitting section 15 of the information projection unit 11.

The RFID unit 6 is configured as follows. A circuit section including an antenna circuit 7 is connected to an IC chip 8 having a memory. In this example, the IC chip used was Infineon I-code used for a non-contact IC card. The antenna circuit used a three-turn loop antenna. Here, the RFID unit and the display unit are arranged on the integrated support member without overlapping the display unit and the circuit unit in a plane. This state is shown in FIG. FIG. 8 is a sectional view of an example of the present non-contact IC chip mounted body. The display unit 1 and the RFID unit 6 are mounted side by side on the integrated support member 20 via an adhesive layer 21.

(4) The display unit 1 displays information on the display unit 2 by irradiating light from an information projection unit 11 which is an information projection unit placed outside the non-contact IC chip mounting body 9. The information projection unit 11 drives the trigger transmission unit 15 and the projector 12 based on an instruction from a projector 12 that projects information light, an RFID reader / writer (hereinafter referred to as R / W) unit 10 and an external information input terminal 14. And a trigger transmitting unit 15 for transmitting a trigger signal to the non-contact IC chip mounting body 9. In addition, a power supply unit 16 that mainly supplies power to the projector 12 through the control circuit 13 is separately provided. In this example, the R / W unit 10 and the information projection unit 11 are integrated to form an R / W + information projection device 17. As the projector 12, a general projector is used. It can also be formed by a filter such as a liquid crystal interposed between the light source and the IC chip mounting body. Here, when rewriting the information on the display unit 2, it is preferable that the projector 12 be as close as possible to the display unit 2 and that the two be temporarily fixed together to display fine information. In some cases, at least a part of the display unit 2 and the control circuit 3 are formed integrally on the same substrate or the like. In such a case, the display unit is considered to include the control circuit.

This example is configured as described above, and in particular, by having a display portion and a circuit portion including an antenna circuit that does not overlap with the display portion, to prevent a change in stray capacitance due to a capacitor effect, The effect of maintaining the communication frequency is obtained.
In addition, by including a display unit including a display portion and a circuit portion including an antenna circuit that does not overlap with the display portion, a component of a noise electromagnetic wave generated at the time of rewriting of the display unit that passes through the antenna coil circuit of the RFID unit is significantly reduced. Since this can be reduced, the electromotive force generated in the antenna coil can be suppressed, and malfunction or destruction of the IC chip can be prevented.
As a specific example of the arrangement of the display unit and the antenna circuit which does not overlap with the display unit, an arrangement in which the display unit and the RFID unit are juxtaposed as shown in FIG. . As another example, there is also an example in which an antenna unit is arranged around a display unit and an RFID unit is arranged. Such an example is shown in FIG. FIG. 9 is a plan view of another example of the non-contact IC chip mounted body according to the present invention. With the arrangement as in this example, it is possible to increase the opening of the antenna circuit, so that it is easy to increase the communication distance. When the antenna circuit 7 is arranged around the display unit 2, the control circuit 3, the driving power supply 5, and the like, which are the components of the display unit 1, are surrounded by the antenna circuit similarly to the display unit. Or it may be located outside the antenna circuit.

FIG. 2 is a schematic time-series flowchart for displaying the non-contact IC chip mounted body shown in FIG.
When a radio wave is transmitted from the R / W unit 10 to the RFID unit 6, an electromotive force is generated in the antenna circuit 7 of the RFID unit due to an electromagnetic induction effect, the power is supplied to the IC chip 8, and the IC chip is activated. Communication is established between the W unit and the IC chip. This stage is Step 1.

(4) According to the information input from the information input terminal 14 such as a personal computer, the information is sent from the R / W unit 10 to the RFID unit 6, and the electronic information in the IC chip is rewritten. For example, in the case of a use such as a prepaid card, the usage amount is rewritten to the remaining amount information obtained by subtracting the used amount from the initial remaining amount. This stage is Step 2.

After confirming that the rewriting of the electronic information has been performed properly, the R / W unit 10 uses the trigger transmitting unit 15 via the control circuit 13 to rewrite the electronic paper information. And a timer for emitting light from the projector 12 on the information projection unit 11 side is started. This stage is steps 3 and 4.

(4) The information projection unit 11 irradiates the display unit 2 with information light for rewriting electronic paper at a preset timing by the timer. This is step 7.

(4) Upon receiving the trigger signal, the trigger receiving unit 4 of the display unit 1 starts the timer. This is steps 5 and 6. At a predetermined timing, a pulse voltage is applied from the control circuit 3 to the photoconductive layer of the display unit 2 to which the information light is irradiated. Thereby, the information of the information light that has been irradiated in advance in step 7 is fixed on the display unit. This is step 8. According to such a timing, the irradiation is thereafter terminated, and the information of the information light is fixed on the display unit as shown in step 9.

(1) The example of FIG. 1 is characterized in that the display unit 1 is completely independent of the RFID unit 6 by mounting the trigger receiving unit 4 and the driving power source 5 of the display unit on the IC chip mounting body.

General electronic paper requires a control IC chip for image display by forming pixels with electrodes such as a simple matrix or TFT using transparent electrodes. In many cases, the image control IC chip can be used also as the RFID unit IC chip due to cost and other problems. In this case, however, it is necessary to connect the RFID unit and the display unit with a wired circuit. However, when both are detachably combined, a physical connection terminal is indispensable. In actual operation, one of the problems is to maintain the connection terminal portion in a good state due to contamination, rust and foreign matter.

(3) FIG. 3 shows a configuration diagram of a non-contact IC chip mounted body using another type of electronic paper. In the drawings, the components denoted by the same reference numerals are basically the same. This example is not a method of rewriting information by information projection but an example of a non-contact IC chip mounting body having a display unit of a type in which a matrix is formed by transparent electrodes. Since it is necessary to send information from the IC chip 8 of the RFID unit 6 to the control circuit 3 of the display unit 1 by wire, a physical connection terminal is provided to operate the display unit 1 and the RFID unit 6 independently. There is a need. Further, since the formation of the matrix of the transparent electrodes and the display drive circuit 17 are required, the configuration and the like are likely to be complicated.

In the example of the non-contact IC chip mounting body shown in FIG. 1, since the display unit has a trigger for rewriting display by unique electromagnetic wave stimulation, it is completely independent of the RFID unit. This is more preferable because it does not occur.
Each element technology exemplified in the above description will be described in detail below.

・ Electronic paper The electronic paper is explained in more detail. As basic performance, it can be viewed without the need for a light source inside the electronic paper, digital and analog information can be displayed and rewritten, energy for maintaining the display (backup power supply) is unnecessary, and rewriting energy is small. It is mentioned as a feature. In addition, it has portability like printed matter, and has flexibility that can be bent or wound depending on the type. Generally, display is performed by changing the optical properties of liquid crystal by applying a voltage to electrodes or conductive parts on the display unit, attracting solid or liquid charged particles to the electrodes, and causing particle inversion. There are many things. The electronic paper referred to in the present invention includes an image driving unit that externally applies an electromagnetic wave including light or the like in a voltage application state disclosed in Japanese Patent No. 3038635 or the like. Since electronic paper can display a high-definition image, it is preferable to display a barcode, a two-dimensional barcode, or the like. This is very convenient for a kanban system for logistics use and product management.
Specific examples of electronic paper are shown below, but the present invention is not limited to these examples.

(1) Electrophoretic display using microcapsules Inside microscopic microcapsules of several μm to several tens μm, particles such as inorganic and organic pigments, dyes, metal powders, glass and resin powders, and hydrocarbons and halogenated carbon Hydrogen, a dispersion medium such as alcohols, a coloring agent such as anthraquinone dye, triphenylmethane dye, and a surfactant as a particle dispersant are made into a paint, and a coating film is formed on the upper and lower electrodes. Insert it in the board. For the upper and lower electrodes, pixels such as a simple matrix or a TFT are formed using a material such as ITO. Considering a system in which white titanium oxide particles that tend to be negatively charged in a blue dye are dispersed, by applying a negative charge to the upper electrode part of the pixel and the lower electrode, the titanium oxide particles , And a pixel which becomes white when viewed from above is formed. Conversely, if a positive charge is applied to the upper electrode portion and the lower electrode, the titanium oxide particles move to the lower electrode side, and a pixel which becomes blue when viewed from above is formed. By using such a technique, a contrast is generated in each pixel to form an image. For details, refer to (Electrophoretic Ink: A Printable Display Material, SID 97 Digest, pp. 75-76 (1997)).

(2) Electronic paper using two-color fine particles painted on a hemisphere basis. Microspheres painted on a white and black basis for each hemisphere are formed into spherical pores formed in a transparent resin layer. Enclose inside. The space between the holes and the microspheres is filled with a lubricating liquid as required. For example, when the white portion of the microsphere is formed of a coating material which is easily charged negatively and the black portion is formed of a coating material which is easily charged positively, the upper electrode portion of the pixel, the lower electrode has a negative electrode. By applying an electric charge, the white side of the microsphere is rotated and attracted to the upper electrode side, and a pixel which becomes white when viewed from above is formed. Conversely, if a positive charge is applied to the upper electrode part minus and the lower electrode, the black side of the microsphere is rotated and suctioned to the upper electrode side, and a pixel that becomes black when viewed from above is formed. . By using such a technique, a contrast is generated in each pixel to form an image.
For details, see (The Gyricon as an Electric Paper Medium, Japan Hardcopy '98, pp. 96-97 (1998)).

(3) Like a light control layer containing electronic paper liquid crystal as a component using the light scattering mode of liquid crystal, and hydrogenated amorphous silicon placed under the light control layer, the impedance of which changes according to the received light. A photoconductive layer that generates both electron and hole carriers by appropriate exposure, and changes the light transmittance of the light control layer by exposing the photoconductive layer while applying a voltage. By coloring the photoconductive layer, a portion having a high light transmittance where the liquid crystal is vertically aligned when viewed from above is black, and a portion having a low light transmittance where the liquid crystal is randomly aligned is white (scattering). Light). The impedance, that is, the conductivity of the photoconductive layer changes according to the intensity (modulation degree) of the light applied to the photoconductive layer, and the voltage from the voltage applying means is applied to the dimming layer by an amount corresponding to the impedance. The light transmittance of the light control layer, that is, the gradient, is determined by the applied voltage. That is, it is possible to transfer image information from various projectors, CRTs, and the like to electronic paper. The details of the present technology are disclosed in Japanese Patent No. 3038835 or the like. This type of electronic paper mainly used in the present invention is suitable.

As a specific example, a case is considered in which a cholesteric liquid crystal layer in an electrically bistable state is laminated between a photoconductive layer whose resistance value changes by receiving light in a voltage applied state and a transparent electrode.
When the resistance value of the photoconductive layer changes according to the received energy, the electric field intensity applied to each pixel of the cholesteric liquid crystal layer sandwiched between the photoconductive layer and the transparent electrode changes. The alignment state of the cholesteric liquid crystal changes due to the difference in the electric field strength. In a pixel having an appropriate electric field strength, focal conic alignment is established, and extraneous light passes through, and the color of the photoconductive layer is visually recognized. Pixels to which no electric field is applied (light is not applied) are in a planar orientation, and extraneous light is scattered and visually recognized as white.
If a process of maintaining an electric bistable state is performed by adding a small amount of a polymer to the liquid crystal or depositing an alignment film, these bistable states are maintained even after the electric field is removed. You. Depending on the orientation state of the liquid crystal layer, the external light is transmitted and scattered to form a contrast so that image information can be visually recognized. Such an electronic paper display unit is provided between a transparent substrate formed by sputtering a transparent electrode such as ITO (indium tin oxide) over a substrate such as glass, PET (polyethylene terephthalate), or PC (polycarbonate). The layers forming the photoconductive layer are sequentially laminated by means of vapor deposition, spin coating, etc., and an intermediate layer such as PVA and a cholesteric liquid crystal layer which is a display element are laminated thereon by means of die coating or the like. Is done. (March 31, 2001, Fuji Xerox Presentation Materials of the Japan Society of Applied Physics and Journal of the Japan Society of Applied Physics, March 31, 2000 Proceedings of Fuji Xerox NBC Electronic paper using cholesteric liquid crystal-from optical image rewriting by organic photoreceptor)

(4) Other electronic papers By sandwiching a thin layer mixed with powders of different colors, which are easily charged to plus and minus, with electrodes forming a matrix from above and below, and controlling the direction of electric charge applied to each pixel There are a type that forms an image, a type that opens and closes a minute mechanical blind using electric charges, and a type that uses the memory property of a ferroelectric liquid crystal.

The RFID unit communicates with a reader / writer through electromagnetic waves of various specific frequencies such as 125 kHz, 13.56 MHz, UHF band, microwave band, etc., and transmits and receives information through an antenna provided. If a material that reflects or absorbs electromagnetic waves including carbon black is nearby, the floating capacitance changes due to the interaction with the RFID antenna circuit, and the frequency at which the antenna transmits and receives deviates from the specified center frequency. Occurs. For this reason, the communication distance is shortened, and in the worst case, communication becomes impossible. When the electronic paper and the RFID are overlapped, the same phenomenon occurs when the electrode portion or the conductive layer, which is a constituent material of the display portion, interacts with the antenna of the RFID unit. Such a phenomenon does not occur in a non-contact IC chip mounted body in which a display unit and a circuit unit including an antenna circuit are arranged without overlapping as in the present invention.

一般 Generally, when rewriting electronic paper, a voltage of several tens to several hundreds of volts is applied to the electrodes. It is conceivable that noise radio waves generated at this time induce an electromotive force in the antenna of the RFID unit or a circuit inside the IC chip, causing the IC chip to malfunction or, in the worst case, to destroy the IC chip. Such voltage induction hardly occurs due to the above arrangement.

-RFID unit The RFID unit is composed of an IC chip and an antenna bonded to the IC chip. An IC chip conforming to ISO15693 or ISO14443 can be used. The antenna may be formed by etching a thin film of aluminum, copper, or the like, may be formed by etching a copper wire, a platinum wire, or the like, or may be formed by screen printing using an ink containing silver particles. A printed antenna that can be used can be used. The bonding between the IC bare chip and the antenna is often formed by a flip chip method. In addition to NCP bonding using a non-conductive adhesive, ACF and ACP bonding using a conductive adhesive in which fine particles such as silver are dispersed are used. No. A modularized IC chip formed by encapsulating a bare chip with a lead frame and a gold wire, etc., and encapsulating it in epoxy resin or the like can be used. In this case, a welding method using a laser or a large current may be used. It is possible.

Also, an IC card generally called a combination card or a hybrid card having both non-contact and contact functions can be used as the RFID unit according to the present invention. Since this type of card has contact terminals in advance, a physical connection terminal is provided between the control circuit 3 and the IC chip 8 rather than a type in which information is rewritten by information projection as shown in FIG. It can be said that the card is suitable for the required type.

As the trigger signal receiving means, a sensor that can detect electromagnetic waves such as radio waves, magnetic fields, and infrared rays, as well as sound waves and ultrasonic waves, can be used. In the case of infrared rays, a sensor capable of detecting a slight change in thermal energy due to infrared rays as a change in electric charge, such as a pyroelectric ceramic sensor, can be used. In the case of a magnetic field, a trigger can be formed by a method in which a coil is formed using a ceramic or metal generally called soft ferrite as a magnetic core, and an induced current generated by a change in magnetic flux density therein is detected. In the case of a sound wave or a sound wave, a film obtained by laminating a film of silver or the like as electrodes on both surfaces of a piezoelectric ceramic thin plate such as lead zirconate titanate and bonding to a thin diaphragm of stainless steel or brass can be used.
In any case, the voltage application to the electrodes of the display unit is controlled by a circuit configuration such as a sensor + amplifier circuit + control circuit + timer circuit so as to match the timing of receiving the rewriting electromagnetic wave.

It is preferable that the display unit and the RFID unit are mounted on a support member integrated so that the region of the RFID unit including the circuit portion including the antenna circuit and the display portion of the electronic paper do not overlap with each other. Mounting methods include two-component curing type, thermosetting type, and method of bonding with solvent-evaporating type adhesive or adhesive, method of fixing with double-sided tape, method of thermocompression bonding using thermoplastic resin, bonding by ultrasonic bonding. Etc. are possible. The display unit may be mounted on an RFID unit having a sufficient surplus area in advance, or the RFID unit may be mounted on the display unit.

FIG. 4 is a configuration diagram of an example of another embodiment of the non-contact IC chip mounted body according to the present invention.
In FIG. 4, the configuration is basically the same as that of the non-contact IC chip mounted body of FIG. 1, and the units denoted by the same reference numerals in the figure are basically the same. The difference between this example and the example of FIG. 1 resides in that the information light itself emitted by the information projection unit 11 is used as a trigger signal received by the trigger receiving unit. In this case, it is not necessary to attach a trigger transmitting unit to the information projection unit 11 side. A light receiving unit serving as a trigger receiving unit is mounted near the display unit of the non-contact IC card mounting body. Various methods can be used as a method for the light receiving section to actually trigger. For example, the information light is pre-irradiated from the R / W, and the timer is started when the trigger light receiver receives the information light. After a predetermined timing delay, a pulse voltage is applied to the photoconductive layer of the display unit to which the optical information has been irradiated. Thus, the information light can be fixed on the display unit.

複数 Also, a plurality of light receiving units are installed as trigger receiving units, and signals from all the light receiving units can be used to confirm that the projection light from the information projection unit is reliably applied to the display unit. In addition, the light receiving element of the light receiving unit should be installed deep from the surface of the display unit, and it should be determined that the information light is irradiated to the predetermined position without being affected by the light of disturbance light, and triggering should be performed. Is possible. In this case, it is preferable to dispose the light receiving section around the display section 2 in order to secure more reliable image fixation on the display section.

In each of the examples shown in FIGS. 1, 3 and 4, examples in which the display unit incorporates a drive power source 5 for driving the display unit are introduced. Although it is possible to supply the driving power supply externally, if the driving power supply is not built in the non-contact IC chip mounting body 9, the power supply from the outside such as a rewriter for rewriting the display unit is performed. The electrode connection for receiving must be performed with high accuracy, and the advantage of the non-contact IC chip mounted body cannot be utilized. By incorporating a power supply, it is possible to perform rewriting without electrode bonding with high accuracy, which is preferable in that the original function of the non-contact IC chip mounted body can be exhibited.

FIG. 5 shows an example of a non-contact IC chip mounted body having a structure in which an RFID unit and a display unit can be detachably combined. FIG. 5 is a perspective view of an example of the non-contact IC chip mounted body of the present invention. The configuration is the same as the non-contact IC chip mounting body shown in FIGS. When confirming the internal information of the RFID unit, as shown in FIG. 5, the RFID unit 6 is inserted into the insertion hole 1a provided in the display unit 1 to integrate the two, and the R / R is formed by the method described above. Necessary information can be displayed on the display unit by the W + information projection device 17. By detachably attaching the display unit to an existing RFID medium such as a non-contact IC card, the electronic information stored in the IC chip can be visually recognized as necessary.

For example, a Kanban system is used for logistics, but if it is operated and stored in an outdoor exposure environment, the RFID unit is often sealed with a relatively durable material. Although it is thought to have sufficient durability against impact, the display unit is more robust than the RFID unit because it often uses a transparent electrode such as ITO or a liquid or liquid crystal encapsulated in microcapsules. In many cases, there is a concern that a failure is likely to occur.
In such a case, when the RFID unit and the display unit are detachably combined as described above, the display unit is a display unit that rewrites information by information projection, and has a configuration shown in FIGS. 1 and 4. In the case of the non-contact IC chip mounted body, as described above, since the electrical connection between the RFID unit and the display unit is not required, the RFID is required in a situation where robustness is required such as transportation or outdoor storage. Only the unit is used, and it is connected to the display unit only when visual confirmation is required in a factory or the like, so that it is possible to use the visual control together.

The display unit shown in FIG. 6 assumes that the display unit separated from the above-mentioned RFID unit is used independently. FIG. 6 is a perspective view of the display unit separated from the RFID unit. This is a so-called holder unit with a display unit. It can be used as it is as a stand-alone electronic paper, and instead of a non-contact IC chip mounting part (RFID unit), it is used to bond advertising media and papers on which title papers, sticky notes, department names, etc. are printed, such as conferences and exhibitions , Can be used as a ticket, a guide medium, and a contact slip.
Further, when the holder is used after being processed into a pass case, a wallet, a bag, or the like, or when displaying the remaining balance in an assumed automatic ticket gate, it is not necessary to take out the IC card from the wallet, which is convenient.

FIG. 7 shows an example in which a cholesteric liquid crystal is used for the display unit of the display unit of the non-contact IC chip mounted body shown in FIG. 1 and a plurality of types of cholesteric liquid crystals are used for at least a part of the display unit. FIG. 7 is a plan view of an example of a display unit using individual display units using different liquid crystals for a part of the display unit. The display portion is preferably provided in a relatively small area as shown in the figure, and may be called a display window. A plurality of liquid crystals having a large difference in the threshold value of each cholesteric liquid crystal with respect to the pulse voltage applied from the control circuit 3, that is, a large difference in the voltage value at which the alignment state of each liquid crystal in the display portion changes, is used. Thus, each of the display portions is constituted.

(7) Such display portions are arranged in a block shape, for example, as shown in FIG. 7, and a rough reference of the remaining balance is printed in the vicinity. The partial display portions (display windows) a, b, c, and d composed of different liquid crystals arranged in a block form serve as indicators, and are used for rewriting, such as a railway automatic ticket gate. If you do not have enough time, touch the electronic paper rewriting part of the automatic ticket gate, and not a detailed image, but a rough indication depending on which part of the display part (display window) is colored. Display the balance. That is, when a small amount of light, light from the information projection unit 11 or external light enters the display unit, a threshold value suitable for the display portion (display window) of the money area based on the balance information from the RFID unit, for example, FIG. In this case, the control circuit 3 applies a voltage corresponding to the threshold value of the display portion in the area 3000 indicated by c. Therefore, in this case, the control circuit 3 generates a simple information indicating to the trigger receiving section 15 which of the control circuit 3 should generate a voltage suitable for the threshold value, together with the information on the timing for fixing the optical information to the display section. That is, it is necessary to transmit rough balance information from the trigger transmission unit 15. In such a case, in particular, the area of the display portion (display window), which is a part of the display portion, is configured to have a relatively small area, and the electrodes and the like are made independent to operate independently with other display portions. Is preferred. For example, at the time of instantaneous communication such as passing through an automatic ticket gate, only a trigger signal is received from the information projection unit 11 and minimum information required by using external light is used to determine whether a certain area is colored. In other words, it is possible to simply display the image with the presence / absence of a color like a monochrome display. When specialized for such an operation, the information projection unit 11 has a simple configuration that no longer requires the projector 12.

By using a liquid crystal layer or a colored layer having a different color for each of the display portions described above, it is possible to configure a display portion in which the display of the display portion includes at least a substantially color-only display. . In this case, similarly to the above, when sufficient time for rewriting is not taken as in a railway automatic ticket gate, by touching the electronic paper rewriting unit of the automatic ticket gate, a fine image is displayed. The display is performed according to which color of the partial display portion is colored. For example, considering the remaining amount display, the operation is performed such that 70% or more of the charge upper limit remains for cyan, 40% or more for yellow, and less than 40% for magenta and needs to be recharged.

When a color display is required, a three-layer liquid crystal having three primary colors of red, yellow, and magenta, which has a difference in the threshold of each cholesteric liquid crystal with respect to a pulse voltage applied from the outside. Layers can be stacked, and various colors can be realized by additive mixing in combination of the planar and focal conic alignment states of each layer according to the applied voltage. For details of the color display, refer to the Japan Hardcopy 2000 June 13 proceedings.

Since the non-contact IC chip mounting body has a rewritable and always visible display portion, the information in the IC chip can always be referred to, so that it can be used as a name tag, a sign card, or the like.

FIG. 1 is a configuration diagram of an example of a non-contact IC chip mounted body according to the present invention. FIG. 2 is a schematic time-series flowchart for displaying the non-contact IC chip mounted body shown in FIG. 1. FIG. 9 is a configuration diagram of a non-contact IC chip mounted body of an example using another type of electronic paper. FIG. 10 is a configuration diagram of an example of another embodiment of a non-contact IC chip mounted body according to the present invention. FIG. 4 is a perspective view of an example of a non-contact IC chip mounted body having a configuration in which an RFID unit and a display unit can be detachably combined. FIG. 4 is a perspective view of a display unit separated from an RFID unit. FIG. 7 is a plan view of an example of a display unit in which individual display units using different liquid crystals are used for a part of the display unit. FIG. 2 is a cross-sectional view of an example of the non-contact IC chip mounted body of the present invention. Plan view of another example of the non-contact IC chip mounted body according to the present invention

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Display unit 2 Display part 4 Trigger receiving part 6 RFID unit 7 Antenna circuit 8 IC chip 9 Non-contact IC chip mounting body 17 R / W + information projection device 20 Holder-shaped display unit from which RFID unit was removed

Claims (14)

A display unit having a display portion over which information can be rewritten by applying a voltage; and an RFID unit having a circuit portion including an antenna circuit, wherein the display portion and the circuit portion are arranged without overlapping. Contact IC chip mounted body. (2) The non-contact IC chip mounted body according to (1), wherein the antenna circuit is arranged around the display unit. (3) The non-contact IC chip package according to claim 1 or 2, wherein the display unit is electronic paper. The non-contact IC chip mounted body according to any one of claims 1 to 3, wherein the display unit and the RFID unit are held by an integrated support member. The non-contact IC chip mounted body according to any one of claims 1 to 4, wherein the display unit and the RFID unit are detachably combined. The non-contact IC chip mounted body according to any one of claims 1 to 5, wherein the display unit is an electronic paper of a type in which information is rewritten by information projection from information projection means in a state where a voltage is applied to the electrodes of the display unit. 7. The non-contact IC chip mounted body according to claim 6, wherein the display unit has trigger signal receiving means, and the trigger signal receiving means receives the trigger signal and starts the operation of rewriting the display unit. 8. The non-contact IC chip mounted body according to claim 7, wherein at least a part of the information light from the information projection means is used as a trigger signal. The non-contact IC chip mounted body according to any one of claims 1 to 8, wherein the display unit has a power supply for driving. 10. The non-contact IC chip mounted body according to any one of claims 1 to 9, wherein the display on the display unit substantially includes at least a display based on the presence or absence of a color. The non-contact IC chip mounted body according to any one of claims 1 to 10, wherein a bar code or a two-dimensional bar code is displayed on the display unit. The non-contact IC chip mounted body according to any one of claims 1 to 11, wherein the display unit is an electronic paper using cholesteric liquid crystal. The non-contact IC chip mounted body according to any one of claims 1 to 12, wherein all or a part of the information stored in the FRID part is visually displayed on the display part. A display unit to which the RFID unit is detachable, wherein the RFID unit is detached from the non-contact IC chip mounted body according to any one of claims 5 to 13.

Images