JP2000099663A - Hybrid card reader and writer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the harmful effects caused by the electromagnetic induction to the auto-tracking/auto-focusing control by providing a constitution where the commands given from a host computer are not received at one of both recording parts, etc., while a recording or reproducing command is executed at the other recording part. SOLUTION: An MPU 203 contained in a hybrid card reader/writer 200 monitors the commands given from a host computer 201 and discriminates the type of a received command. If a recording/reproducing command is received against an IC memory part, the MPU 203 judges whether the received command is currently executed to an optical recording part. Then it's decided that the recording/reproducing command is not executed to the optical recording part, the recording/reproducing command is started to the IC memory part. Then the communication of information is carried out between the antenna coils to record or reproduce the information to the IC memory part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid card reader / writer which records information on a hybrid card having two different recording areas having different characteristics or reproduces recorded information.

[0002]

2. Description of the Related Art In recent years, many optical information recording / reproducing apparatuses using a recording medium such as an optical file and a compact disk have been proposed, but they are more portable than these recording media and have a smaller size. Therefore, a large-capacity optical information recording medium in the form of a card (hereinafter referred to as an optical card) has attracted attention. The advantages of optical cards are not only large capacity, but also easy and inexpensive copying. Further, the optical card is a write-once type storage medium and cannot be falsified because information once recorded cannot be rewritten, and is a highly reliable recording medium. Furthermore, it is a small and light credit card size, large-capacity recording medium that is easy to carry, and large demand is expected.

An optical card is a medium for recording or reproducing information by literally irradiating light onto the optical card. Recorded information is reproduced by reciprocating a minutely focused light spot on an optical card, and information is recorded as an optically detectable record pit array by modulating the light spot according to the record information. can do. At this time, auto-focusing (hereinafter referred to as AF) is a technique for accurately recording information in a predetermined area.
Control and automatic tracking (hereinafter, referred to as AT) control. The AT control controls the light spot position in a direction orthogonal to the scanning direction in the optical card surface. Also, A
The F control controls the light spot position in a direction perpendicular to the optical card surface. Of course, both controls are necessary even during reproduction.

[0004] In recent years, IC cards having excellent security features have also attracted attention. It is well known that IC cards include a contact type and a non-contact type. A non-contact type IC card uses electromagnetic waves as a medium for transmitting information between the IC card and the recording / reproducing device. That is, this is a method of transmitting information using the induction electromagnetic field as a transmission medium with the coils facing each other. This IC card is IC
Laminate the chip and coil with vinyl chloride and mount. The power supply is divided into two types, one with and one without, but a batteryless type without a power supply for recording and reproduction (only batteries for storing and storing information Some have) are becoming mainstream.

Accordingly, the applicant of the present application has proposed a hybrid card having a non-contact IC memory unit and an optical recording unit which combines the advantages of both of the above cards and a hybrid card for recording and reproducing information on and from the hybrid card. An application for a reader / writer has been filed as Japanese Patent Application No. 9-192366. FIG. 3 is an external view of the hybrid card in which the IC memory section of the IC card, the antenna coil, and the optical recording section of the optical card coexist on one card-shaped medium.
FIG. 3A shows the non-contact IC memory portion side (front side) of the hybrid card, and FIG. 3B shows the optical recording portion side (back side).

First, an IC memory section of a hybrid card will be described with reference to FIG. In FIG. 3A, 100 is a hybrid card, 101 is a CP.
U, an IC memory unit including a memory and a power supply unit, and 102 is an antenna coil. The IC memory unit 101 is connected to the antenna coil 102. The IC memory unit 101 and the antenna coil 102 are mounted by laminating.

Next, the principle of recording and reproducing information in the IC memory unit 101 of the hybrid card 100 will be briefly described with reference to FIG. 4, reference numeral 101 denotes an IC memory unit, and reference numeral 102 denotes an antenna coil on the hybrid card side. The IC memory unit 101 and the antenna coil 102 shown in FIG.
Respectively. Reference numeral 110 denotes an antenna coil on the device side electromagnetically coupled to the antenna coil 102;
Reference numeral 1 denotes an IC memory unit reader / writer.

When recording information, a radio frequency current of several hundred kHz is applied to the antenna coil 110 according to a recording command of the IC memory unit reader / writer 111. This causes a change in the magnetic field near the antenna coil, and the same signal as the signal applied to the antenna coil 110 by electromagnetic induction is induced in the antenna coil 102 of the hybrid card. The signal induced in the antenna coil 102 is
IC memory unit 101 including CPU, memory, and power supply circuit
The write command and the write information are identified by the IC memory unit 101, and the information is stored in the memory.

When information is reproduced, a reproduction command of the IC memory unit reader / writer 111 is transmitted to the antenna coil 1 of the IC memory unit reader / writer 111 according to the same principle as recording.
10 to the antenna coil 102 of the hybrid card, and information is read from the specified data memory area from the IC memory unit 101. The read information is modulated by an oscillator (not shown) of the IC memory unit 101, transmitted from the antenna coil 102 to the antenna coil 110 of the IC memory unit reader / writer 111 by electromagnetic induction, and demodulated by the IC memory unit reader / writer 111. Become information. Although simple, the above is the principle of recording and reproducing information using electromagnetic induction.

Next, the optical recording unit 10 of the hybrid card
3 will be described. As shown in FIG. 3B, an optical recording unit 103 is provided on the back surface of the hybrid card 100. FIG. 5 is a schematic plan view showing the optical recording unit 103 in detail. In FIG. 5, a large number of information tracks 2 and tracking tracks 4 are alternately arranged on the recording surface of the optical recording unit 103. The optical recording unit 103 is provided with a home position 3 which is a reference position for accessing the information track 2. The information tracks 2 are arranged in order from 2-1 to 2-2, 2-3,. As shown in FIG. 5, tracking tracks are arranged adjacent to these information tracks 2 in the order of 4-1 4-2-3. These tracking tracks are used as a guide for AT control for controlling the light spot so as not to deviate from the target information track during light spot scanning during information recording and reproduction.

Such AT control detects a deviation (AT error) of a light spot from an information track in an optical head, and feeds the detected information back to a tracking actuator that drives an objective lens in a tracking direction. This is done by the circuit. That is,
By moving the objective lens with respect to the optical head body in the tracking direction (D direction), control is performed so that the light spot does not deviate from the target information track.

Also, in scanning information tracks on an information track at the time of information recording and reproduction, an objective lens is formed on the recording surface of the hybrid card in order to form a spot of an appropriate size (focusing). Then, AF control is performed.
In such AF control, a deviation (AF error) of a light spot from an in-focus state is detected in an optical head, and this detection signal is fed back to a focus actuator that moves an objective lens along the optical axis direction, and the By moving the objective lens with respect to the head body in the focus direction, the light spot is controlled so as to focus on the recording layer of the hybrid card. Further, in the AT / AF control, even when conditions such as external vibration and medium defect occur at the time of design, a light spot does not deviate from a target information track or a spot of an appropriate size is formed on a recording surface. Gain control is performed to amplify each AT / AF error signal.

[0013]

In the prior art, at the time of recording / reproducing to / from the optical recording area on the hybrid card 100, the light spot does not deviate from a target information track, or the light spot does not deviate from the hybrid card. AT / AF control is performed by a servo control circuit so as to focus on the recording layer. However, during recording / reproducing to / from the optical recording unit of the hybrid card, a recording / reproducing command to the IC memory unit is issued or
When a recording / reproducing command to the optical recording unit is issued during recording / reproducing to / from the C memory unit, the recording / reproducing operation to the IC memory unit is performed by using the electromagnetic induction by the antenna coil. An erroneous error signal may be generated due to the influence of electromagnetic induction. Therefore, AT based on the erroneous error signal
When the / AF control is performed, the light spot is controlled so that the light spot deviates from the target track even though the light spot is originally located on the target information track, or the light spot is originally recorded on the hybrid card. There is a problem that the objective lens is controlled so that the light spot deviates from the recording layer even though the layer is in focus, and recording and reproduction cannot be performed normally.

The present invention has been made in view of the above-mentioned conventional problems, and provides a hybrid card reader / writer capable of preventing adverse effects on AT / AF control due to electromagnetic induction and stably performing recording / reproduction on a hybrid card. The purpose is to:

[0015]

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical recording section for recording or reproducing information by irradiating a light beam and an IC memory section for recording or reproducing information by communication between antenna coils. A hybrid card reader / writer that uses a hybrid card having two recording units and records information or reproduces recorded information in the two recording units based on a command from a host computer. When a recording or reproducing command for one of the recording units of the recording unit or the IC memory unit is received, a command from the host computer is not accepted when the recording or reproducing command is being executed on the other recording unit. Achieved by the characteristic hybrid card reader / writer.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention. In FIG.
First, reference numeral 200 denotes the optical recording unit 1 of the hybrid card 100.
03 and a hybrid card reader / writer for recording / reproducing information in / from the IC memory unit 101, and 201 is a host computer of an external control device. The hybrid card reader / writer 200 is connected to the host computer 201 via the interface 202, and records information on the hybrid card 100 or reproduces recorded information under the control of the host computer 200. 3 is used as the hybrid card 100, and an IC memory unit 10 including a CPU, a memory, and a power supply unit is provided on the front side.
1, an antenna coil 102, and an optical recording unit 103 on the back side. As shown in FIG. 1, the hybrid card 100 is placed on the card tray 212, and is placed such that the antenna coil 102 on the front side of the card 100 faces down and the optical recording unit 103 on the back side faces up.

The hybrid card reader / writer 200 is provided with an MPU 203 having a built-in ROM and RAM, and performs data communication and control with the host computer 200. The MPU 203 controls each unit such as a card feed motor 204, a head feed motor 205, an AT / AF control circuit 206, and a modulation / demodulation circuit 210 according to the type of command from the host computer 200. The card feed motor 204 drives a transport mechanism under the control of the MPU 203, transports the hybrid card 100 to the card tray 212, reciprocates the card tray 212 in the R direction, and discharges the card 100 out of the machine.

Reference numeral 211 denotes a light beam irradiating optical system including a semiconductor laser as a light source. When recording and reproducing information, the light beam from the light source is focused on a minute light spot and irradiated onto the optical recording unit 103 of the card 100. Reference numeral 207 denotes a photodetector that detects light reflected from the optical recording unit 103, and 208 drives a part of the light beam irradiation optical system 38 to shift the focus position of a light spot on the surface of the optical recording unit 103 in the Z direction, that is, AF for performing auto focus control by moving in the direction perpendicular to the optical card surface
The actuator 209 drives a part of the light beam irradiation optical system 211 to move the light spot on the optical recording unit 103 in the Y direction, that is, the direction perpendicular to the information track of the optical recording unit 103, and performs auto tracking control. AT for
Actuator.

An optical head includes the light beam irradiation optical system 211, the photodetector 207, the AF actuator 208, and the AT actuator 209. The head feed motor 205 moves the optical head in the Y direction based on the control of the MPU 203 to change the light spot to the optical recording unit 10.
3 access the desired track. AT / AF
The control circuit 206 controls the AF actuator 208 and the AT actuator 20 based on the output signal from the photodetector 207.
9 and auto-focus control so that the light spot from the light beam irradiation optical system 211 is focused on the recording surface of the optical recording unit 103 and the light spot scans following the information track. Perform auto tracking control.

The modulation / demodulation circuit 210 is a circuit for modulating recording information under the control of the MPU 203 and demodulating reproduction information. When recording information, the host computer 20
1 is modulated by the modulation / demodulation circuit 210, the light source in the light beam irradiation optical system 211 is driven in accordance with the modulation signal, and the intensity-modulated light beam is scanned on the information track, whereby the optical recording unit 103 is modulated. Record information on top.
In reproducing information, the light beam irradiation optical system 211 scans the information track of the optical recording unit 103 with a reproducing light beam, and the photodetector 207 detects reflected light from the optical recording unit 103. Then, in the modulation / demodulation circuit 210, the photodetector 2
The recording information is reproduced by performing predetermined signal processing such as binarization and demodulation based on the signal 07.

In the card tray 212, an I / O for recording / reproducing information in / from the IC memory section 101 of the card 100 is provided.
C memory section reader / writer 111, antenna coil 110 for communicating with antenna coil 102 of card 100
Is provided. The IC memory unit 10 includes the IC memory unit reader / writer 111 and the antenna coil 110.
The principle of recording / reproducing to 1 is as described in FIG. M
The PU 203 controls the IC memory unit reader / writer 111 in response to a command from the host computer 201, and records / reproduces information in / from the IC memory unit 101 of the card 100. The major feature of such a hybrid card reader / writer 200 is that the MPU 20 has different reader / writers for the optical recording unit 103 of the card 100 and the two recording units of the IC memory unit 101.
3 can access respective information.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. In FIG. 2, first, the MPU 203 in the hybrid card reader / writer 200
Monitors a command from the host computer 201 (S300). When a command is received, the type of the command is determined (S301).
If it is a recording / playback command for the memory unit 101,
It is determined whether a recording / reproducing command is currently being executed for the optical recording unit 103 (S302). At this time, if it is determined that the recording / reproducing command is not being executed for the optical recording unit 103 at present, the recording / reproducing command for the IC memory unit 101 is started, and information is exchanged between the antenna coils. Recording or reproduction of information is performed on 101 (S304).

Next, it is determined whether or not the command has been completed (S313). If the command has been completed, it is determined whether or not there is an end status (S314). S315), and returns to S300. If the command has not been completed in S313, the process returns to S300 to wait for the command. If a recording / reproducing command is being executed on the optical recording unit 101 in S302, an error is notified to the host computer 201 (S303), and the command from the host computer 201 is not accepted. Next, the process proceeds to S313, and S313 to S3 are performed in the same manner as described above.
15 is completed.

On the other hand, when the command received in S301 is a recording / reproduction command for the optical recording unit 103,
It is determined whether a recording / reproduction command to the IC memory unit 101 is currently being executed (S307). If no recording / reproduction command is being executed to the IC memory unit 101, the optical recording unit 103 Then, a recording / reproducing command is started (S309), and an optical head irradiates a light beam to record information on the optical recording unit 103 or reproduce recorded information. If a recording / reproducing command is being executed on the IC memory unit 101 in S307, an error is notified to the host computer 201 (S308), and the host computer 201 command is not accepted. Further, the command received in S301 is
1. If the command is not a recording / reproducing command to the optical recording unit 103, the process of the command is executed in S311. In addition,
After the processing of S308, S309, and S311, the process proceeds to S313, and the same processing is performed.

[0025]

As described above, according to the present invention, when a recording or reproducing command for either the optical recording unit or the IC memory unit is received, the recording or reproducing command is being executed on the other recording unit. When there is, since the command from the host computer is not accepted,
Electromagnetic induction due to antenna coil communication can be prevented from adversely affecting the AT / AF control, and the light spot does not deviate from the target information track or become out of focus on the recording layer. Operation can be stabilized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment of FIG.

FIG. 3 is a plan view illustrating a configuration of an IC memory unit side and an optical recording unit side of the hybrid card.

FIG. 4 is a diagram for explaining the principle of recording / reproducing information in an IC memory unit of a hybrid card in a non-contact manner.

FIG. 5 is a diagram showing an optical recording unit of the hybrid card.

[Explanation of symbols]

 Reference Signs List 100 hybrid card 101 IC memory unit 102 antenna coil 103 optical recording unit 110 antenna coil 111 IC memory unit reader / writer 200 hybrid card reader / writer 201 host computer 203 MPU

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G11B 20/10 G06K 19/00 F

Claims (1)

[Claims] 1. A hybrid card having two recording units, an optical recording unit for recording or reproducing information by irradiating a light beam, and an IC memory unit for recording or reproducing information by communication between antenna coils. Used, in a hybrid card reader / writer that records information in the two recording units or reproduces recorded information based on a command from the host computer, wherein the host computer sends either the optical recording unit or the IC memory unit. A hybrid card reader / writer which, when receiving a recording or reproducing command for a recording unit, does not accept a command from the host computer when a recording or reproducing command is being executed on the other recording unit.