JP2000090637A - Cassette label, videotape cassette and ic card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cassette label with a built-in transmitting/receiving circuit which can transmit/receive information satisfactorily between itslef and a body- side apparatus such as a videotape recorder or the like without increasing the power consumption. SOLUTION: An integrated circuit 2 which comprises a storage part and a signal processing part is provided. A printed antenna coil 4 which is connected to the integrated circuit 2 and which transmits a signal generated by the signal processing part is provided. A label base body 1 which supports the integrated circuit 2 and the printed antenna coil 4, which is placed on the outer face part of a videotape cassette 101 and which is situated directly under the printed antenna coil 4 is provided. The label body 2 is formed of a soft magnetic material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video tape cassette mounted on a video tape cassette or the like.
The present invention relates to a cassette label capable of receiving a signal from a writer and a video tape cassette to which the cassette label is attached.

[0002]

2. Description of the Related Art Video tape recorders for recording video data output from a video camera or a television receiver using a video tape cassette have been proposed. In such a video tape cassette, there is a demand to make it possible to easily confirm the recorded contents after recording. In particular, when used for interviews at television broadcasting stations, it is necessary to quickly select and edit the necessary cuts from a large number of cuts taken and recorded by a video camera, making the recorded content easy. It is very important to be able to confirm quickly.

In conventional video tape recorders, a memo is separately recorded on the paper at the time of recording (at the time of photographing) and the memo is recorded at the time of reproduction or editing. Searching for desired video data while watching is performed. When a large number of video tape cassettes are handled as in a so-called cassette library, a bar code is printed on a cassette label to be attached to the video tape cassette, and the bar code is used to manage the location of each video tape cassette. It is carried out.

A video tape in which a semiconductor memory device such as a flash memory is attached to a cassette containing a video tape, and various information such as recording time, recorded content, and title can be recorded on the semiconductor memory device. Cassettes have been proposed. In such a video tape cassette, the recording and reproduction of information with respect to the semiconductor memory device may be performed in a contact manner via terminal pins provided on the back surface of the cassette or the like. Gazette and Japanese Patent Laid-Open No. 10-14404
As described in Japanese Patent Application Publication No. 8 (1996), it may be performed in a non-contact manner via a transmission / reception circuit provided in a cassette label.

A transmitting / receiving circuit provided in a cassette label is a semiconductor memory device (for example, an EP having a capacity of about 1 KB).
ROM) connected to a printed antenna coil of several turns. On the video tape recorder side, a transmission / reception circuit including a print antenna coil, a driver, and the like is provided. The content of the information transmitted from the transmission / reception circuit in the cassette label and received by the video tape recorder is displayed on the video tape recorder.

[0006]

By the way, as described above, in a cassette label configured to transmit various information such as recording time, recorded content, and title to a video tape recorder side in a non-contact manner, The communication distance between the transmitting / receiving circuit in the cassette label and the video tape recorder depends on the sensitivity and magnetic field strength of both the cassette label side and the video tape recorder side. The maximum is about 50 mm. If the antennas on both the cassette label side and the video tape recorder side face each other not parallel but inclined, there is a possibility that communication becomes impossible. If the power supplied to the transmitting antenna is increased, the transmission / reception sensitivity is increased, but a problem of increased power consumption is caused, and there is a possibility of violating regulations such as the Radio Law.

In the antenna coil on the video tape recorder side, since a metal member is present around the antenna coil, the antenna sensitivity is effectively deteriorated due to eddy current loss, and the reliability of communication may be impaired. is there. Also in this case, the power supplied to the antenna cannot be unnecessarily increased.

Accordingly, the present invention has been proposed in view of the above-described circumstances, and enables good transmission and reception of information to and from a main unit such as a video tape recorder without increasing power consumption. It is intended to provide a cassette label having a built-in transmission / reception circuit. Another object of the present invention is to provide a video tape cassette to which such a cassette label is attached.

[0009]

In order to solve the above-mentioned problems, a cassette label according to the present invention transmits an integrated circuit having a storage unit and a signal processing unit and a signal connected to the integrated circuit and emitted from the signal processing unit. Alternatively, a printed antenna coil for receiving a signal from a reader / writer, a label substrate supporting the integrated circuit and the printed antenna coil and mounted on the outer surface of the video tape cassette, and a print antenna coil are provided immediately below the printed antenna coil. And a member made of a soft magnetic material.

A cassette label according to the present invention is an integrated circuit having a storage unit and a signal processing unit, and is connected to the integrated circuit to transmit a signal generated by the signal processing unit or to receive a signal from a reader / writer. A printed antenna coil, a label substrate that supports the integrated circuit and the printed antenna coil and is mounted on the outer surface of the video tape cassette,
And a member made of a soft magnetic material located inside the printed antenna coil in the same plane as the printed antenna coil.

An IC card according to the present invention comprises: an integrated circuit having a storage unit and a signal processing unit; and a signal connected to the integrated circuit and transmitted by the signal processing unit.
An antenna coil for receiving a signal from a reader / writer, a card base supporting the integrated circuit and the antenna coil, and a member made of a soft magnetic material disposed immediately below the antenna coil are provided. Things.

Further, an IC card according to the present invention includes an integrated circuit having a storage unit and a signal processing unit, and a signal transmitted from the signal processing unit connected to the integrated circuit.
An antenna coil for receiving a signal from a reader / writer, a card base supporting the integrated circuit and the antenna coil, and a member made of a soft magnetic material located inside the antenna coil on the same plane as the antenna coil It is characterized by having.

In these cassette labels and IC cards, the presence of a member made of a soft magnetic material allows
The intensity of the magnetic field generated from the antenna coil is increased.

A video tape cassette according to the present invention comprises a cassette, a pair of tape reels rotatably stored in the cassette, and a video tape wound around these tape reels. An integrated circuit having a processing unit and a label base supporting a printed antenna coil connected to the integrated circuit and transmitting a signal generated by the signal processing unit, or receiving a signal from a reader / writer, and a position directly below the printed antenna coil. And a cassette label provided with a member made of a soft magnetic material disposed on the outer surface of the cassette.

Further, a video tape cassette according to the present invention comprises a cassette, a pair of tape reels rotatably housed in the cassette, and a video tape wound on these tape reels, and a storage unit and a signal An integrated circuit having a processing unit and a label base supporting a printed antenna coil connected to the integrated circuit and transmitting a signal emitted by the signal processing unit, or receiving a signal from a reader / writer, and in the same plane as the antenna coil; A cassette label including a soft magnetic member located inside the antenna coil is mounted on the outer surface of the cassette.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the cassette label according to the present invention is attached to the back of the video tape cassette 101, and the title of the video data recorded on the video tape cassette 101 is described. It is a strip-shaped label that can be used. Video tape cassette 101
Comprises a cassette 102, a pair of tape reels (not shown) rotatably housed in the cassette 102, and a video tape (not shown) wound around the tape reels.

This cassette label has a label base 1 as shown in FIGS. 2 and 3. As shown in FIG. 4, the label substrate 1 is prepared by mixing a soft magnetic powder, a binder, a solvent, and other additives with a synthetic resin material, coating and curing the resultant, and laminating a double-sided adhesive paper thereon. It is cut to the size of. As the soft magnetic material powder, ferrite-based powder (Mn-Zn
System, Ni-Zn system) or metal system (FeAlSi)
System, SiFe system). The label base 1 may be either a rigid one or a flexible one. The label substrate 1 has
Drilling is performed corresponding to a position where an integrated circuit described later is mounted.

As shown in FIGS. 2 and 3, the cassette label has an IC chip 2 serving as an integrated circuit having a storage unit and a signal processing unit. This IC chip 2
Is mounted on a polyimide base film 3 provided on a label substrate 1. In the storage unit (for example, an EPROM having a capacity of about 1 KB) of the IC chip 2, the recording time, the recorded contents, and the like of the video tape cassette 101 are stored.
Various information such as a title can be recorded.

As shown in FIG. 4, a polyimide base film 3 is formed by applying a photosensitive agent to a polyimide copper-clad base,
Exposure, development, and etching are performed to form a predetermined copper foil pattern. This copper foil pattern has an antenna coil section 4 serving as a printed antenna coil, and a chip mount section 5 to which the IC chip 2 is attached and to which the IC chip 2 and the antenna coil section 4 are connected. .

The polyimide base film 3 is coated with a pressure-sensitive adhesive 6, and the pressure-sensitive adhesive 6
The label substrate 1 is attached (laminated). And, on this polyimide base film 3,
The IC chip 2 is mounted. At this time, as shown in FIG. 3, the IC chip 2 is attached to a position corresponding to the through hole 7 formed by the boring process.

This cassette label is completed by laminating coated paper with double-sided adhesive paper and laminating release paper.

In this cassette label, the antenna coil unit 4 is configured to transmit a signal generated by the signal processing unit of the IC chip 2 according to the information signal stored in the storage unit to an antenna coil of a main unit such as a video tape recorder. It is transmitted by the electromagnetic coupling effect between the two. In this cassette label, the antenna coil unit 4 receives a signal transmitted by an electromagnetic coupling action from an antenna coil of a main unit such as a video tape recorder and sends the signal to the signal processing unit of the IC chip 2. Remember.

In this cassette label,
As shown in FIG. 5, since the label base 1 located immediately below the antenna coil section 4 is made of a soft magnetic powder mixed therein, the axial direction of the antenna coil section 4 radiated by the antenna coil section 4, as shown in FIG. (Z-axis direction) magnetic field strength (Hz)
However, as compared with the case where the label substrate 1 is not made of a soft magnetic material, it is enhanced about two to three times. Therefore, in this cassette label, the magnetic field strength (H
If z) is kept constant, power consumption can be reduced.

For example, when the thickness of the label substrate 1 is 0.4 mm
In the case of Sendust (FeAlSi), 2.1 g /
In the case of mixing cm3 or 3.3 g / cm3, as shown in FIGS. 5 and 6, it was confirmed that the strength of the magnetic field generated from the antenna coil unit 4 was increased.

Further, in this cassette label, since the label base 1 is made by mixing the soft magnetic powder, unnecessary radiation (for example, a high frequency of 13.56 MHz of a carrier frequency) radiated from the IC chip 2 is generated. Is absorbed, suppressed and reduced by the label substrate 1.

It should be noted that the provision of the member made of a soft magnetic material directly below the antenna coil portion as described above is not only required on the cassette label side, but also on a main body of a video tape recorder or the like which receives a transmission signal from the cassette label. It may be performed also in the receiving circuit on the side. As described above, when the members made of the soft magnetic material are provided on both the transmission side and the reception side, the sensitivity of transmission and reception can be further improved.

In this cassette label,
As shown in FIG. 7, a member 8 made of a soft magnetic material may be provided at a position inside the antenna coil unit 4 substantially in the same plane as the antenna coil unit 4. Further, in this cassette label, as shown in FIG. 8, the IC package 9 holding the IC chip 2 may be formed as a member made of a soft magnetic material from a synthetic resin material mixed with a soft magnetic material. .

As shown in FIG. 9, the cassette label has a soft magnetic sheet 10 made of a soft magnetic material adhered to the back of the cassette 102, and the soft magnetic sheet 10
The polyimide base film 3 on which the antenna coil portion 4 is formed and the IC chip 2 is attached is made of a synthetic resin (for example,
Polyethylene terephthalate (PET: Polyethylenete)
It is also possible to dispose a structure mounted on a base 11 made of rephthalate).

Further, as shown in FIG. 10, the cassette label is provided on at least the rear portion 10a of the cassette 102.
Is formed of a soft magnetic material, and an antenna coil portion 4 is formed on the back surface of the cassette 102 so that the IC chip 2
Can be configured by disposing a polyimide base film 3 to which is attached a base 11 made of synthetic resin.

Further, as shown in FIG. 11, the label base of the cassette label may be formed by sticking a sheet 13 made of a synthetic resin material on a sheet 12 made of a soft magnetic material. Further, as shown in FIG. 12, a sheet 13 made of a soft magnetic material may be attached to a sheet 13 made of a synthetic resin material.

Note that, in the above-described embodiment, I
Although the C chip 2 is disposed on the inner side of the antenna coil unit 4, the IC chip 2 may be disposed on the outer side of the antenna coil unit 4.

Then, the present invention, as shown in FIG.
It can be applied to a so-called IC card. That is, the IC card is, as shown in FIG.
And an antenna coil 14 connected to the IC chip 2
Is sandwiched between the card substrates 15 and 16 on the front and back, and at least one of the card substrates 15 and 16 is formed of a soft magnetic material. With the card base made of this soft magnetic material, the transmission / reception sensitivity is improved.

In this IC card, FIG.
As shown in (1), a member 17 made of a soft magnetic material may be provided at a position inside the antenna coil 14 substantially in the same plane as the antenna coil 14. Further, in this IC card, as shown in FIG. 15, the IC package holding the IC chip 2 may be formed as a member made of a soft magnetic material from a synthetic resin material mixed with a soft magnetic material.

In this IC card, FIG.
As shown in FIG. 6, a member 17 made of a soft magnetic material is provided at a position inside the antenna coil 14 substantially in the same plane as the antenna coil 14, and at least one of the card bases 15, 16 is made of a soft magnetic material. It may be formed by.

[0036]

As described above, in the cassette label and the IC card according to the present invention, the strength of the magnetic field generated from the antenna coil is enhanced by the presence of the member made of the soft magnetic material. Therefore, the sensitivity of signal transmission and reception is improved, and good reliability and performance can be secured. Further, power consumption can be reduced and the driving voltage of the integrated circuit can be reduced.

Further, in the cassette label and the IC card, unnecessary radiation radiated from the integrated circuit can be absorbed and reduced, which is an effective EMC measure.

That is, the present invention provides a cassette label and an IC card having a built-in transmission / reception circuit capable of transmitting / receiving good information to / from a main unit such as a video tape recorder without increasing power consumption. Can be done.

Further, the present invention can provide a video tape cassette to which such a cassette label is attached.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a video tape cassette on which a cassette label according to the present invention is mounted.

FIG. 2 is a plan view showing a configuration of a main part of the cassette label.

FIG. 3 is a longitudinal sectional view showing a configuration of a main part of the cassette label.

FIG. 4 is a flowchart showing a manufacturing process of the cassette label.

FIG. 5 is a graph showing a spatial distribution of a magnetic field intensity generated in the cassette label.

FIG. 6 is a graph showing a relationship between a magnetic field intensity generated in the cassette label and a distance.

FIG. 7 is a perspective view showing a configuration of a cassette label in which a soft magnetic material is disposed in a printed antenna coil.

FIG. 8 is a perspective view showing a configuration of a cassette label in which an IC package is formed from a soft magnetic material.

FIG. 9 is a perspective view showing a configuration of a cassette label in which a sheet made of a soft magnetic material is disposed immediately below a printed antenna coil.

FIG. 10 is a view showing a configuration of the cassette label and the video tape cassette in which a part of the video tape cassette is formed of a soft magnetic material.

FIG. 11 is a longitudinal sectional view showing another embodiment of the configuration of the cassette label.

FIG. 12 is a vertical sectional view showing still another embodiment of the configuration of the cassette label.

FIG. 13 is an exploded perspective view showing a configuration of an IC card according to the present invention.

FIG. 14 is an exploded perspective view showing a configuration of an IC card in which a soft magnetic material is provided in an antenna coil.

FIG. 15 is a view showing an I package formed of a soft magnetic material;
FIG. 3 is a perspective view illustrating a configuration of a C card.

FIG. 16 is an exploded perspective view showing the configuration of an IC card in which a soft magnetic material is provided in an antenna coil and a card base is formed of a soft magnetic material.

[Explanation of symbols]

1 label base, 2 IC chip, 3 polyimide base film, 4 antenna coil, 8, 17 soft magnetic material, 9 IC package, 10 soft magnetic sheet,
14,15 Card base

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Inomata, Inventor Koji Shinagawa 6-7-35, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Eiji Ota 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation F term (reference) 5B035 BB09 BC00 CA08 CA23

Claims (7)

[Claims] An integrated circuit having a storage unit and a signal processing unit; a printed antenna coil connected to the integrated circuit for transmitting a signal generated by the signal processing unit or receiving a signal from a reader / writer; A label substrate that supports the integrated circuit and the printed antenna coil and is mounted on the outer surface of the video tape cassette; and a member made of a soft magnetic material disposed immediately below the printed antenna coil. Cassette label to do. 2. An integrated circuit having a storage unit and a signal processing unit, a print antenna coil connected to the integrated circuit for transmitting a signal generated by the signal processing unit or receiving a signal from a reader / writer, A label base supporting the integrated circuit and the printed antenna coil and mounted on the outer surface of the video tape cassette; and a member made of a soft magnetic material located inside the printed antenna coil on the same plane as the printed antenna coil. A cassette label comprising: 3. The cassette label according to claim 2, wherein the member made of a soft magnetic material is made of a synthetic resin material mixed with a magnetic material, and is a package holding an integrated circuit. 4. An integrated circuit comprising a cassette, a pair of tape reels rotatably housed in the cassette, and a video tape wound on the tape reel, having an integrated circuit having a storage unit and a signal processing unit, and the integrated circuit. A label base supporting a printed antenna coil connected to a circuit for transmitting a signal generated by the signal processing unit or receiving a signal from a reader / writer; and a soft magnetic material disposed immediately below the printed antenna coil. A video tape cassette, characterized in that a cassette label having a member comprising: is mounted on an outer surface of the cassette. 5. An integrated circuit comprising a cassette, a pair of tape reels rotatably housed in the cassette, and a video tape wound on the tape reel, and an integrated circuit having a storage unit and a signal processing unit, and the integrated circuit. A label base supporting a printed antenna coil connected to a circuit and transmitting a signal emitted by the signal processing unit, or receiving a signal from a reader / writer, and inside the antenna coil in the same plane as the antenna coil. A video tape cassette, comprising: a cassette label having a soft magnetic member positioned on the outer surface of the cassette. 6. An integrated circuit having a storage unit and a signal processing unit; an antenna coil connected to the integrated circuit for transmitting a signal generated by the signal processing unit or receiving a signal from a reader / writer; An IC card, comprising: a card base supporting a circuit and an antenna coil; and a member made of a soft magnetic material disposed immediately below the antenna coil. 7. An integrated circuit having a storage unit and a signal processing unit; an antenna coil connected to the integrated circuit for transmitting a signal generated by the signal processing unit or receiving a signal from a reader / writer; An IC card, comprising: a card base supporting a circuit and an antenna coil; and a member made of a soft magnetic material located inside the antenna coil in the same plane as the antenna coil.