JP5423974B2 - Non-contact data carrier with display function - Google Patents

Description

  The present invention relates to a non-contact type data carrier with a display function provided with a display unit capable of changing display without contact.

  In recent years, non-contact data carriers that read and write data in cards such as Suica (registered trademark) in a non-contact manner using RF-ID technology have become widespread. Currently, a writing method using heat is adopted for the display unit in such a non-contact type data carrier, but in such a method, it is impossible to change the display in a non-contact manner. There was a problem. Thus, a technique has been proposed in which a display unit that can be changed in a non-contact manner is provided on the display unit of the non-contact type data carrier.

As one of such things, for example, in Patent Document 1 (Japanese Patent Laid-Open No. 2005-165814), non-contact data exchange configured to wirelessly transmit and / or receive data is performed. An RF-ID device capable of displaying data-related information, which includes a display having a display memory property as a display unit, is disclosed.
JP 2005-165814 A

  In a non-contact type data carrier equipped with a display unit such as electronic paper as described in Patent Document 1, when the data carrier is held over a reader / writer, radio waves used by the reader / writer function as noise, and the display There was a problem of adversely affecting the above image rewriting.

The present invention is for solving the above problems, and the invention according to claim 1 includes a first main surface, and a second main surface in a front-back relationship with the first main surface. A card-like base material having an antenna coil, an antenna coil disposed on the second main surface, and a jumper conductor disposed on the first main surface and electrically connected to both ends of the antenna coil through a through hole And a display unit comprising a base material part and a display pixel constituent part, and arranged on either the first main surface or the second main surface, the first main surface or the second main surface A conductive shield part disposed on any one of the surfaces, and when the projection is performed from the first main surface toward the second main surface, the projection formed by the display unit is the conductive shield portion is included in the projection to be formed, the display unit is arranged on the first main surface The base portion also serves as the conductive shield portion and has a second counter electrode provided so as to extend from the antenna coil, from the first main surface toward the second main surface When the projection is performed, the projection formed by the base portion of the display portion overlaps with a part of the projection formed by the second counter electrode, and is adjusted by the base portion and the second counter electrode. A non-contact data carrier with a display function, characterized in that it constitutes a capacitor .

Moreover, the invention which concerns on Claim 2 has a card-shaped base material which has a 1st main surface, and the 2nd main surface in the front-and-back relationship with the said 1st main surface, and said 2nd main surface An antenna coil that is disposed, a jumper conductor that is disposed on the first main surface and that is electrically connected to both ends of the antenna coil through a through hole, a base portion, and a display pixel component portion, A display unit disposed on either the first main surface or the second main surface; and a conductive shield unit disposed on either the first main surface or the second main surface. And the projection formed by the display unit when projected from the first main surface toward the second main surface is included in the projection formed by the conductive shield unit, and the display unit Is disposed on the first main surface, and the base portion also serves as the conductive shield portion. A first counter electrode provided to extend from the jumper conductor; a second counter electrode provided to extend from the antenna coil; and an adhesive dielectric layer disposed on the first counter electrode; And the base material portion of the display unit is provided on the adhesive dielectric layer, and the base material is projected from the first main surface toward the second main surface. A part of any one of the projection formed by the portion, the projection formed by the first counter electrode, and the projection formed by the second counter electrode overlap, and the base portion, the first counter electrode, and the projection A non-contact type data carrier with a display function, characterized in that an adjustment capacitor is constituted by any one of the second counter electrodes.

According to a third aspect of the present invention, in the non-contact type data carrier with a display function according to the first or second aspect, 16.84 MHz is used in a reader / writer corresponding to the non-contact type data carrier with a display function. In this case, the inductance of the antenna coil is set to 1.58 μH or more and 8.86 μH or less.

According to a fourth aspect of the present invention, in the non-contact type data carrier with a display function according to any one of the first to third aspects, 16.84 MHz is used in a reader / writer corresponding to the non-contact type data carrier with a display function. In this case, the capacitance of the adjustment capacitor is set to 0.38 pF or more and 39.83 pF or less.

The invention according to claim 5 is the non-contact type data carrier with display function according to claim 1 or claim 2 , wherein 13.56 MHz is used in the reader / writer corresponding to the non-contact type data carrier with display function. In this case, the inductance of the antenna coil is set to 2.33 μH or more and 13.36 μH or less.

The invention according to claim 6 is a reader / writer corresponding to the non-contact type data carrier with display function in the non-contact type data carrier with display function according to claim 1, claim 2 or claim 5. When .56 MHz is used, the capacitance of the adjustment capacitor is set to 1.32 pF or more and 55.46 pF or less.

According to a seventh aspect of the present invention, in the non-contact type data carrier with a display function according to the first to sixth aspects, a display unit mounting reference line is provided on the second main surface, and the display unit mounting reference is provided. The wire is made of the same material as the antenna coil.

  According to the non-contact type data carrier with a display function of the present invention, when the projection is performed, the projection formed by the display unit is configured to be included in the projection formed by the conductive shield unit. The influence of the radio wave on the display unit can be blocked by the conductive shield, and the image rewriting of the display unit can be performed stably.

It is a figure which shows typically the outline of the internal structure of the non-contact-type data carrier with a display function which concerns on 1st Embodiment of this invention. It is a figure which shows typically the outline of the internal structure of the non-contact-type data carrier with a display function which concerns on 2nd Embodiment of this invention. It is a figure which shows typically the outline of the internal structure of the non-contact-type data carrier with a display function which concerns on 3rd Embodiment of this invention. It is a figure which shows typically the outline of the internal structure of the non-contact-type data carrier with a display function which concerns on 4th Embodiment of this invention. It is a figure which shows perspectively the adjustment capacitor | condenser part formed in the non-contact-type data carrier with a display function which concerns on 4th Embodiment of this invention. It is a figure which shows typically the outline of the internal structure of the non-contact-type data carrier with a display function which concerns on 5th Embodiment of this invention. It is a figure which shows typically the outline of the internal structure of the non-contact-type data carrier with a display function which concerns on 6th Embodiment of this invention. It is a figure which shows the resonant frequency measurement result of the non-contact-type data carrier with a display function in which the electroconductive shield part is not provided. It is a figure which shows the resonant frequency measurement result of the non-contact-type data carrier with a display function which concerns on this invention provided with the electroconductive shield part. It is a figure which shows the resonant frequency measurement result of the non-contact-type data carrier with a display function which concerns on this invention provided with the electroconductive shield part. It is a figure which shows the calculation result of an inductance value suitable as an antenna coil of the non-contact-type data carrier with a display function which concerns on this invention. It is a figure which shows the calculation result of a suitable capacitance value as an adjustment capacitor | condenser part of the non-contact-type data carrier with a display function which concerns on this invention. It is a figure which shows the calculation result of an inductance value suitable as an antenna coil of the non-contact-type data carrier with a display function which concerns on this invention. It is a figure which shows the calculation result of a suitable capacitance value as an adjustment capacitor | condenser part of the non-contact-type data carrier with a display function which concerns on this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view schematically showing an outline of the internal structure of a non-contact data carrier with a display function according to the first embodiment of the present invention. FIG. 1 (A) is a view of the internal structure seen from the first main surface side of the card-like substrate constituting the non-contact data carrier with a display function, and FIG. 1 (B) is in FIG. 1 (A). It is a figure which shows a XX 'cross section typically.

  In FIG. 1, 100 is a non-contact data carrier with a display function, 110 is a card-like substrate, 111 is a first main surface, 112 is a second main surface, 120 is an antenna coil, and 121 is an antenna coil first end. , 122 is the antenna coil second end, 130 is the jumper conductor, 131 is the jumper conductor first end, 132 is the jumper conductor second end, 133 is the first end through hole, and 134 is the second end through. Reference numeral 135 denotes an IC chip, 140 denotes a conductive shield part, 150 denotes a display part, 151 denotes a base part, and 155 denotes a display pixel constituent part.

A non-contact type data carrier 100 with a display function according to this embodiment includes an RFID (Radio Frequency) having a short-range wireless communication function called a non-contact type IC card or the like.
In the non-contact data carrier 100 with a display function, various configurations are incorporated on the basis of a card-like substrate 110 made of a material such as PET. . This card-like substrate 110 has two main surfaces that are in a front-back relationship, one of which is referred to as a first main surface 111, and the other main surface is referred to as a second main surface 112. To do.

  The basic RFID function provided in the non-contact data carrier 100 with a display function according to the present embodiment will be described. The antenna coil 120 for performing short-range wireless communication with a reader / writer is provided. The antenna coil 120 is formed of an aluminum thin film layer, a copper thin film layer, or the like on the second main surface 112 of the card-like substrate 110.

  An antenna coil first end 121 and an antenna coil second end 122 are provided at each end of the antenna coil 120 on the second main surface 112. On the other hand, a jumper conductor 130 is provided on the first main surface 111 of the card-like substrate 110 by an aluminum thin film layer, a copper thin film layer, or the like, and a jumper conductor first end portion that is both ends of the jumper conductor 130. The first end through-hole 133 and the second end that pass through the card-like base material 110 and connect the first main surface 111 side and the second main surface 112 to the 131 and the jumper conductor second end portion 132. Each through hole 134 is provided.

  The antenna coil first end 121 and the jumper conductor first end 131 are electrically connected by the first end through hole 133 and the second end through hole 134, and the antenna coil second end 122 is connected to the jumper conductor second. When the end 132 is conductive, the antenna coil 120 functions as a coiled loop antenna.

  An IC chip 135 is provided in the loop of the antenna coil 120 configured as described above. The IC chip 135 receives a power from a reader / writer (not shown) and accumulates it to obtain a power source, a transmission / reception circuit that transmits / receives data to / from the reader / writer, and processes received data and data to be transmitted. Built-in data processing circuit, encryption / decryption circuit for processing encryption / decryption of data to be transmitted / received, memory for storing data held by RFID, display control circuit for controlling display on display unit 150, etc. It is.

  The display unit 150 can exchange signals with the IC chip 135 through wiring (not shown), and is driven by a control signal from the IC chip 135 to reproduce a display visible from the first main surface 111 side. It is a display part that can. Such a display unit 150 includes a base part 151 such as PET or PEN, and a display pixel constituent part 155 formed on the base part 151. Note that there are various types of display principles that can be employed in the display pixel configuration unit 155. For example, by adopting a display principle similar to that of electronic paper, display having a memory property can be performed.

A conductive shield portion 140 is provided on the second main surface 112 so as to correspond to the display portion 150 provided on the first main surface 111 side. More specifically, when the projection from the first main surface 111 to the second main surface 112 is performed, the projection formed by the display unit 150 is included in the projection formed by the conductive shield unit 140. It is a serious arrangement relationship. Since the conductive shield part 140 is provided so as to correspond to the display part 150, the conductive shield part 140 can block the influence of the reader / writer radio waves on the display part 150. Display unit 15
0 image rewriting can be performed stably.

  In the present specification and claims, the relevance between planar components such as the display unit 150 and the conductive shield unit 140 is described using the concept of “projection” as described above. . More specifically, in the present specification and claims, virtual projection is performed when projection is performed from the first major surface 111 toward the second major surface 112 (that is, when projection is performed in the vertical direction). By comparing the projections of the plane components such as the display unit 150 and the conductive shield unit 140 formed on a horizontal plane, the size relationship of the respective plane components, and when viewed transparently from the vertical direction Represents the inclusive relation of each plane component in.

  In addition, the conductive shield part 140 is preferably made of the same material as the antenna coil 120. The antenna coil 120 provided on the second main surface 112 of the card-like substrate 110 is composed of, for example, an aluminum thin film layer or a copper thin film layer, but the same aluminum thin film layer or copper thin film layer as the antenna coil 120 is used. If the conductive shield part 140 is configured by the above, the antenna coil 120 and the conductive shield part 140 can be manufactured at the same time, and the manufacturing process can be simplified.

  Next, another embodiment of the present invention will be described. FIG. 2 is a view schematically showing an outline of the internal structure of the non-contact data carrier 100 with a display function according to the second embodiment of the present invention. The difference of the second embodiment from the first embodiment is the configuration of the display unit 150 and the configuration of the conductive shield unit 140. The other points are the same, and the description of the other points is omitted. To do. In FIG. 2, the same reference numerals as those in FIG. 1 denote the same components.

  As the display unit 150 of the non-contact data carrier 100 with a display function according to the first embodiment, an insulating synthetic resin such as PET or PEN has been used. On the other hand, a conductive metal is used as a base material part of the display part 150 in the non-contact data carrier 100 with a display function according to the second embodiment. More specifically, a stainless steel substrate 152 is used as a substrate on which the display pixel component 155 of the display unit 150 is provided. Accordingly, the shield portion provided on the second main surface 112 side in the first embodiment is abolished, and in this embodiment, the stainless steel base portion 152 of the display portion 150 also serves as a conductive shield portion. ing.

  According to the second embodiment in which the stainless steel base portion 152 also serving as the conductive shield portion is provided, the influence of the reader / writer radio wave on the display portion 150 is affected by the stainless steel base material also serving as the conductive shield portion. It is possible to block by the unit 152, and image rewriting of the display unit 150 can be performed stably. Moreover, since it becomes unnecessary to provide a shield part in the 2nd main surface 112 side like 1st Embodiment, according to 2nd Embodiment, the merit that a manufacturing process is simplified can be enjoyed.

  Next, another embodiment of the present invention will be described. FIG. 3 is a view schematically showing an outline of the internal structure of the non-contact type data carrier 100 with a display function according to the third embodiment of the present invention. The third embodiment is different from the second embodiment in that the main surface on which the display unit 150 is provided is different. More specifically, the display unit 150 is disposed on the second main surface 112, and the stainless steel base member 152 also serves as a conductive shield unit. Note that in FIG. 3, configurations denoted by the same reference numerals as in FIG. 2 indicate similar configurations.

In the third embodiment shown in FIG. 3, the top of the display surface of the display unit 150 is covered with the card-like base material 110. That is, the display unit 150 is referred to via the transparent card-like substrate 110. Generally, it is necessary to provide a protective layer for protecting the display pixels and the like on the top layer of the display pixel configuration unit 155 of the display unit 150. According to the configuration of the third embodiment, such a configuration is used. It is not necessary to provide a protective layer, and the configuration can be simplified. Further, according to the third embodiment, the influence of the reader / writer radio wave on the display unit 150 can be blocked by the stainless steel base material unit 152 also serving as a conductive shield unit, and image rewriting of the display unit 150 can be performed. It can be performed stably. Moreover, since it becomes unnecessary to provide a shield part on the 2nd main surface 112 side like 1st Embodiment, according to 3rd Embodiment, the merit that a manufacturing process is simplified can be enjoyed.

  In the third embodiment, the display unit attachment reference line 125 is provided on the second main surface 112 side by the same aluminum thin film layer or copper thin film layer as the antenna coil 120. Thus, the display part attachment reference line 125 is made of the same material as the antenna coil 120, thereby simplifying the process of providing the display part attachment reference line 125 and at the same time attaching the display part 150 by the display part attachment reference line 125. By providing such a display unit attachment reference line 125, the manufacturing efficiency can be improved. In addition, providing such a display unit attachment reference line 125 can be applied to other embodiments.

  Next, another embodiment of the present invention will be described. FIG. 4 is a diagram schematically showing an outline of the internal structure of the non-contact data carrier 100 with a display function according to the fourth embodiment of the present invention. FIG. 5 is a perspective view of the adjustment capacitor unit 170 formed in the non-contact data carrier 100 with a display function according to the fourth embodiment of the present invention. The fourth embodiment is different from the first embodiment in that an adjustment capacitor unit 170 for adjusting the resonance frequency is formed. That is, the non-contact type data carrier 100 with a display function according to the fourth embodiment includes a first counter electrode provided so as to extend from the jumper conductor 130 and a first counter electrode provided so as to extend from the antenna coil 120. When the projection is performed from the first main surface 111 toward the first main surface 112, the projection formed by the first counter electrode and the second counter electrode are formed. A part of the projection is overlapped, and the adjustment capacitor unit 170 is configured by the first counter electrode and the second counter electrode.

  The adjustment capacitor unit 170 of the non-contact data carrier 100 with a display function according to the fourth embodiment will be described in more detail with reference to FIG.

  The adjustment capacitor unit 170 includes a first electrode 171 provided so as to extend from the jumper conductor 130 and a second electrode 175 provided so as to extend from the antenna coil 120. Both the first electrode 171 and the second electrode 175 are preferably made of the same material as the jumper conductor 130 and the antenna coil 120. This is because the manufacturing process can be simplified by manufacturing the first electrode 171 and the second electrode 175 with the same material as the jumper conductor 130 and the antenna coil 120.

  The first electrode 171 includes a first counter electrode portion 172 that functions as a counter electrode of the capacitor, and a connecting electrode portion 173 that connects between the counter electrode portions and the jumper conductor. Similarly, the 2nd electrode 175 has the 2nd counter electrode 176 which functions as a counter electrode of a capacitor | condenser, and the connection electrode part 177 which connects between between an opposing electrode part and an antenna coil. Thereby, the adjustment capacitor unit 170 is configured by the card-like substrate 110 between the first counter electrode unit 172 and the second counter electrode 176 functioning as a dielectric. Note that, by removing the connection electrode portion 173 or the connection electrode portion 177, the capacitance of the adjustment capacitor portion 170 can be appropriately adjusted.

  According to the fourth embodiment as described above, since the conductive shield part 140 is provided so as to correspond to the display part 150, the influence of the reader / writer's radio wave on the display part 150 is reduced. It is possible to block by the unit 140, the image rewriting of the display unit 150 can be performed stably, and the resonance frequency that varies due to the provision of the conductive shield unit 140 is adjusted by the adjusting capacitor unit 170. It becomes possible.

  Next, another embodiment of the present invention will be described. FIG. 6 is a diagram schematically showing an outline of the internal structure of the non-contact data carrier 100 with a display function according to the fifth embodiment of the present invention. The fifth embodiment is different from the first embodiment in the configuration of the display unit 150 and the configuration of the conductive shield unit 140. The other points are the same, and the description of the other points is omitted. To do. In FIG. 6, the same reference numerals as those in FIG. 1 denote the same components.

  As the display unit 150 of the non-contact data carrier 100 with a display function according to the first embodiment, an insulating synthetic resin such as PET or PEN has been used. In contrast, a conductive metal is used as the base material portion of the display unit 150 in the non-contact data carrier 100 with a display function according to the fifth embodiment. More specifically, a stainless steel substrate 152 is used as a substrate on which the display pixel component 155 of the display unit 150 is provided. Accordingly, the shield portion provided on the fifth main surface 112 side in the first embodiment is abolished, and in this embodiment, the stainless steel base portion 152 of the display portion 150 also serves as a conductive shield portion. ing.

  In the non-contact type data carrier 100 with a display function according to the fifth embodiment, the stainless steel base portion 152 is electrically connected to the connection electrode portion 173 extending from the jumper conductor 130 on the first main surface 111. It has become. In addition, a second counter electrode 176 that is electrically connected to the connecting electrode portion 177 extending from the antenna coil 120 is provided so as to face this. When the projection is performed from the first main surface 111 toward the second main surface 112, the projection formed by the stainless steel base portion 152 of the display unit 150 and the projection formed by the second counter electrode 176 are performed. A part of them overlaps, and the adjustment capacitor 170 is configured by the stainless steel base portion 152 and the second counter electrode 176. That is, in the present embodiment, the adjustment capacitor unit 170 is configured by the card-shaped substrate 110 between the stainless steel substrate unit 152 and the second counter electrode 176 functioning as a dielectric.

  According to the above-described embodiment, according to the fifth embodiment in which the stainless steel base portion 152 that also serves as the conductive shield portion is provided, the influence of the reader / writer's radio waves on the display portion 150 is reduced. It is possible to block by the stainless steel base material part 152 that also serves as a part, and the image rewriting of the display part 150 can be performed stably. Moreover, since it is not necessary to provide a shield part on the second main surface 112 side as in the fourth embodiment, according to the fifth embodiment, it is possible to enjoy the advantage that the manufacturing process is simplified. In addition, according to the fifth embodiment, it is possible to adjust the resonance frequency that varies due to the provision of the conductive shield portion by the adjustment capacitor portion 170. In addition, the adjustment capacitor unit 170 shares the configuration with the shield unit, and thus it is possible to simplify the manufacturing and to efficiently use the space on the card-like substrate 110. .

Next, another embodiment of the present invention will be described. FIG. 7 is a view schematically showing an outline of the internal structure of the non-contact data carrier 100 with a display function according to the sixth embodiment of the present invention. The sixth embodiment is different from the fifth embodiment in that a first counter electrode portion 172 that is electrically connected to a connection electrode portion 173 extending from the jumper conductor 130 is provided at a position where the display portion 150 is disposed. Further, an adhesive dielectric layer 179 is provided on the first counter electrode portion 172. The display unit 150 manufactured on the stainless steel base member 152 is attached to the adhesive dielectric layer 179.

  In the non-contact type data carrier 100 with a display function according to the sixth embodiment, the stainless steel base portion 152 is electrically connected to the connection electrode portion 173 extending from the jumper conductor 130 on the first main surface 111. It has become. In addition, a second counter electrode 176 that is electrically connected to the connecting electrode portion 177 extending from the antenna coil 120 is provided so as to face this. When projection is performed from the first main surface 111 toward the second main surface 112, the projection formed by the stainless steel base material portion 152, the projection formed by the first counter electrode portion 172, and the second counter electrode A part of any two projections of the projection formed by 176 overlaps, and the adjustment capacitor 170 is configured by any one of the stainless steel base portion 152, the first counter electrode portion 172, and the second counter electrode 176. It comes to be a feature. That is, in this embodiment, the adhesive dielectric layer 179 between the stainless steel base material portion 152 and the first counter electrode portion 172, and the card between the stainless steel base material portion 152 and the second counter electrode 176. The adjustment capacitor portion 170 is configured by the substrate 110 functioning as a dielectric.

  According to the embodiment as described above, according to the sixth embodiment in which the stainless steel base portion 152 that also serves as the conductive shield portion is provided, the influence of the reader / writer radio wave on the display portion 150 is reduced. It is possible to block by the stainless steel base material part 152 that also serves as a part, and the image rewriting of the display part 150 can be performed stably. In addition, according to the sixth embodiment, it is possible to adjust the resonance frequency that varies due to the provision of the conductive shield portion by the adjustment capacitor portion 170. In addition, the adjustment capacitor unit 170 shares the configuration with the shield unit, and thus it is possible to simplify the manufacturing and to efficiently use the space on the card-like substrate 110. . Further, the adjustment capacitor unit 170 uses the adhesive dielectric layer 179 and the card-like substrate 110 as dielectrics, and many degrees of freedom are created by setting the capacitance.

  Next, a preferable value as the inductance value of the antenna coil 120 and a preferable value as the capacitance value of the adjustment capacitor unit 170 will be examined. FIG. 8 is a diagram showing a resonance frequency measurement result of a non-contact type data carrier with a display function that is not provided with a conductive shield part. FIG. 8A is a diagram showing the resonance frequency measurement conditions, and FIG. 8B is a graph showing the measurement results.

  The measurement of the resonance frequency shown in FIG. 8A is a measurement of how the resonance frequency changes in accordance with the position of the display unit 150 when 16.84 MHz is used in the reader / writer. is there. When the left corner of the display unit 150 is positioned at the points (1), (2), and (3) in the figure and the resonance frequency is measured, as shown in FIG. 8 (B), the resonance frequency starts from 16.84 MHz. There was no big difference.

  On the other hand, FIG. 9 is a diagram showing a resonance frequency measurement result of the non-contact type data carrier 100 with a display function according to the present invention in which the conductive shield portion is provided. FIG. 9A is a diagram showing the resonance frequency measurement conditions, and FIGS. 9B and 9C are graphs showing the measurement results.

In the measurement of the resonance frequency shown in FIG. 9A, when 16.84 MHz is used in the reader / writer, it depends on the position of the display unit 150 provided with the stainless steel base member 152 also serving as a conductive shield unit. Thus, how the resonance frequency changes is measured. FIG. 9B shows a measurement result obtained by installing the display unit 150 while changing the distance from the left corner of the non-contact type data carrier 100 with a display function. The display unit 150 is also obtained by changing the distance from the right corner. FIG. 9C shows a measurement result obtained by installing and acquiring. As shown in FIGS. 9B and 9C, it was found that the resonance frequency deviates from 16.84 MHz and takes a value in the range of 17.7 MHz to 19.5 MHz.

  FIG. 10 shows a measurement similar to the measurement in FIG. 9 performed by the display unit 150 provided on the stainless steel substrate 152 having a size of 35 mm × 25 mm. 10 (B) and (c), it was found that the resonance frequency deviates from 16.84 MHz and takes a value in the range of 17.1 MHz to 18.0 MHz.

  Based on the above results, preferable values were calculated as the inductance value of the antenna coil 120 and the capacitance value of the adjustment capacitor unit 170. FIG. 11 is a diagram showing a calculation result of an inductance value suitable for the antenna coil 120 of the non-contact data carrier 100 with a display function according to the present invention. FIG. 11A shows an inductance value of the antenna coil 120 necessary for dealing with a resonance frequency of 20 MHz (a value obtained by adding a margin to the previous measurement result), and FIG. This is the inductance value of the antenna coil 120 required to correspond to the value obtained by subtracting the tolerance from the measurement result of (1). Note that the internal capacitance of the IC chip 135 is assumed to be 20 pF, 30 pF, or 97 pF.

  To sum up the results of FIG. 11, when 16.84 MHz is used in the reader / writer corresponding to the non-contact data carrier 100 with a display function, the inductance of the antenna coil 120 should be set to 1.58 μH or more and 8.86 μH or less. Is preferable.

  FIG. 12 is a diagram showing a calculation result of a capacitance value suitable as the adjustment capacitor unit 170 of the non-contact data carrier 100 with a display function according to the present invention. FIG. 12A shows a capacitance value of the adjustment capacitor unit 170 necessary to cope with a resonance frequency of 20 MHz (a value obtained by adding a margin to the previous measurement result), and FIG. 12B shows a resonance frequency of 17 MHz. This is the capacitance value of the adjustment capacitor unit 170 necessary to cope with (a value obtained by subtracting the margin from the previous measurement result).

  To summarize the results of FIG. 12, when 16.84 MHz is used in the reader / writer corresponding to the non-contact data carrier 100 with a display function, the capacitance of the adjustment capacitor 170 is set to 0.38 pF or more and 39.83 pF or less. It turns out that it is preferable.

  The same measurements as those shown in FIGS. 8 to 10 were performed on a 13.56 MHz reader / writer, and preferable values were calculated as the inductance value of the antenna coil 120 and the capacitance value of the adjustment capacitor unit 170. The results are shown below.

  FIG. 13 is a diagram showing a calculation result of an inductance value suitable for the antenna coil 120 of the non-contact data carrier 100 with a display function according to the present invention. FIG. 13A shows an inductance value of the antenna coil 120 necessary for dealing with a resonance frequency of 17 MHz (a value obtained by adding a margin to the measurement result), and FIG. 13B shows a resonance frequency of 14 MHz (from the measurement result). This is the inductance value of the antenna coil 120 necessary to correspond to the value obtained by subtracting the tolerance. Note that the internal capacitance of the IC chip 135 is assumed to be 20 pF, 30 pF, or 97 pF.

  To summarize the results of FIG. 13, when 13.56 MHz is used in the reader / writer corresponding to the non-contact type data carrier 100 with a display function, the inductance of the antenna coil 120 should be set to 2.33 μH or more and 13.36 μH or less. Is preferable.

Further, FIG. 14 in the case where 13.56 MHz is used in the reader / writer is a diagram showing a calculation result of a capacitance value suitable as the adjustment capacitor unit 170 of the non-contact data carrier 100 with a display function according to the present invention. FIG. 14A shows a capacitance value of the adjustment capacitor unit 170 necessary to correspond to a resonance frequency of 17 MHz (a value obtained by adding a margin to the measurement result), and FIG. 14B shows a resonance frequency of 14 MHz (measurement). This is the capacitance value of the adjustment capacitor unit 170 necessary to correspond to the value obtained by subtracting the margin from the result.

  To summarize the results of FIG. 14, when 13.56 MHz is used in the reader / writer corresponding to the non-contact data carrier 100 with a display function, the capacitance of the adjustment capacitor 170 is set to 1.32 pF or more and 55.46 pF or less. It turns out that it is preferable.

  As described above, according to the non-contact data carrier with a display function of the present invention, when the projection is performed, the projection formed by the display unit is configured to be included in the projection formed by the conductive shield unit. The influence of the reader / writer's radio wave on the display unit can be blocked by the conductive shield, and the image rewriting of the display unit can be performed stably.

DESCRIPTION OF SYMBOLS 100 ... Non-contact-type data carrier with a display function, 110 ... Card-shaped base material, 111 ... 1st main surface, 112 ... 2nd main surface, 120 ... Antenna coil, 121 ... Antenna coil first end, 122 ... Antenna coil second end, 125 ... Display unit mounting reference line, 130 ... Jumper conductor, 131 ... Jumper conductor first end, 132 ... Jumper conductor second end, 133 ... First end through hole, 134 ... Second end through hole, 135 ... IC chip, 140 ... Conductive shield, 150 ..Display unit, 151... Base material unit, 152... Stainless steel base material unit, 155... Display pixel constituent unit, 170... Adjustment capacitor unit, 171. ... First counter-current Parts, 173 ... connecting electrode portion, 175 ... second electrode, 176 ... second opposed electrode, 177 ... connecting electrode portion, 179 ... adhesive dielectric layer

Claims (7)

A card-like base material having a first main surface and a second main surface in a front-back relationship with the first main surface;
An antenna coil disposed on the second main surface;
A jumper conductor disposed on the first main surface and electrically connected to both ends of the antenna coil through a through hole;
A display unit comprising a base material unit and a display pixel configuration unit, and arranged on either the first main surface or the second main surface;
A conductive shield portion disposed on either the first main surface or the second main surface,
When the projection is performed from the first main surface toward the second main surface, the projection formed by the display unit is included in the projection formed by the conductive shield unit ,
The display unit is disposed on the first main surface,
The base part also serves as the conductive shield part,
A second counter electrode provided so as to extend from the antenna coil,
When projection is performed from the first main surface toward the second main surface, a projection formed by the base material portion of the display unit and a part of the projection formed by the second counter electrode overlap. And
A non-contact type data carrier with a display function , wherein an adjustment capacitor is constituted by the base portion and the second counter electrode . A card-like base material having a first main surface and a second main surface in a front-back relationship with the first main surface;
An antenna coil disposed on the second main surface;
A jumper conductor disposed on the first main surface and electrically connected to both ends of the antenna coil through a through hole;
A display unit comprising a base material unit and a display pixel configuration unit, and arranged on either the first main surface or the second main surface;
A conductive shield portion disposed on either the first main surface or the second main surface,
When the projection is performed from the first main surface toward the second main surface, the projection formed by the display unit is included in the projection formed by the conductive shield unit,
The display unit is disposed on the first main surface,
The base part also serves as the conductive shield part,
A first counter electrode provided to extend from the jumper conductor;
A second counter electrode provided to extend from the antenna coil;
An adhesive dielectric layer disposed on the first counter electrode;
The base part of the display part is provided on the adhesive dielectric layer,
When projection is performed from the first main surface toward the second main surface, the projection formed by the base material portion, the projection formed by the first counter electrode, and the projection formed by the second counter electrode A part of any two projections of
A non-contact type data carrier with a display function, wherein an adjustment capacitor is configured by any of the base material portion, the first counter electrode, and the second counter electrode. If the 16.84MHz leader writer corresponding to the display function non-contact data carrier is utilized, according to claim 1 or, characterized in that setting the inductance of the antenna coil below 8.86μH more 1.58μH The non-contact type data carrier with a display function according to claim 2 . If the display function 16.84MHz in a non-contact type reader writer corresponding to the data carrier is utilized, according to claim 1, characterized in that setting the capacitance of the adjusting capacitor below 39.83pF more 0.38pF A non-contact type data carrier with a display function according to claim 3 . If 13.56MHz leader writer corresponding to the non-contact data carrier with the display function is utilized, according to claim 1 or, characterized in that setting the inductance of the antenna coil below 13.36μH more 2.33μH The non-contact type data carrier with a display function according to claim 2 . If 13.56MHz leader writer corresponding to the non-contact data carrier with the display function is utilized, according to claim 1, characterized in that setting the capacitance of the adjusting capacitor below 55.46pF more 1.32pF A non-contact data carrier with a display function according to claim 2 or 5 . Wherein the second main surface provided with a display portion mounting reference line, the display unit according to claim 1 to display function non according to claim 6 mounting reference line, characterized in that the same material as the antenna coil Contact data carrier.

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