JPH02210617A - Optical card recording and reproducing device - Google Patents

Abstract

PURPOSE:To shorten the access time at the time of recording by detecting the relative position of an optical card with respect to a head by the output signal from a device for transporting the optical card and selecting the start point for recording in accordance with the detected result. CONSTITUTION:A sector position detecting circuit 27 outputs the prescribed value corresponding to the segmenting position of the sector on the optical card 1 according to a format selection signal 36 inputted thereto by a format selector 32 to a comparator 33. A counter 34 counts the output from an encoder 26. The output count value from the counter 34 and the prescribed value outputted from the format selector 32 are compared by a comparator 33. The comparator 33 outputs the sector position detection signal when the values coincide. This sector position detection signal is outputted to a controller 30. The controller 30 is able to select the start point for recording as desired by counting this signal.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an optical card recording/reproducing device.

[Prior Art] A data recording/reproducing device using an optical card as a recording medium includes an optical card having a plurality of mutually parallel tracks, and an optical head for optically recording and reproducing data on the optical card. Data is recorded and reproduced by relatively reciprocating movement in the track direction and in a direction perpendicular thereto.

FIG. 5 shows an example of the configuration of an optical card used in such an optical card recording/reproducing device.

The optical card 1 has a plurality of tracks 2 extending in the card longitudinal direction and parallel to the card width direction.

Conventionally, in such an optical card, a format is formed in track 2 in advance.

As an example of this pre-record format is shown in FIG. 6, it consists of an ID section at both ends and a data section in which data is recorded between. It has IDs 4a and 4b in which track information is recorded, and the data portion has, for example, four sectors 6a s 6 b s 6c and 5d divided by five sector marks 5.

Usually, these ID parts and sector marks are prerecorded. Note that such an optical card does not have an ID section for each sector in order to obtain a wide data recording area.

In optical cards, the amount of data recorded at one time varies depending on the application, and in order to effectively use the limited recording area, it is necessary to prepare a track format with a sector size suitable for the application. Therefore, as a countermeasure, it is possible to pre-record multiple types of sector marks, etc., as described above, so that track formats with multiple different sector sizes can be configured on a single card. There is a problem in that tracks with a track format that has a sector size that does not suit the application become unused and wasted.

In order to solve this problem, Japanese Patent Laid-Open No. 63-4476 discloses an example in which an optical card having a track without a pre-record area for dividing sectors as described above is used. Here, two types of track formats are used for recording on any track: a data track in which one entire track is recorded as one sector, and a directory track in which the recording information written on this data track is managed. This directory track is recorded in three blocks on one track, and the method will be explained with reference to FIG. FIG. 7(a) shows the reproduced data signal, and FIG. 7(b)
) is the output of the retriggerable one-shot vibrator which receives the reproduced data signal (a) as input, and this signal is Hl
gh indicates that the area where data is recorded is being reproduced. (C) is a signal that detects the falling edge of (b) and becomes High for a certain period of time. (d) is a recording data signal, which is output upon detecting the falling edge of (C). That is, in this recording method, the recording start point is determined based on the end point of the immediately previous recorded block.

[Problems to be Solved by the Invention] In order to shorten the access time for optical cards, it has been considered to record and reproduce data in both directions of relative reciprocating motion between the optical card and the optical head. However, in the conventional optical card recording/reproducing device using an optical card consisting of a track without a pre-record area for dividing the track into sectors as described above, data is recorded in a desired sector using the previously recorded data. Since the recording start point was determined based on the end point of the sector, the relative movement direction of the optical card and optical head during recording was restricted to one direction, which resulted in the problem of slow access time. .

Furthermore, since it is not possible to record, for example, in the third sector after the first sector, the order of recording is restricted, and there is also the problem that it is not possible to record stripes in any sector.

The present invention enables data to be stored in both directions of the relative reciprocating motion between the optical card and the optical head, even when using an optical card having a track without a pre-record area for dividing the data recording area within the track into a plurality of sectors. It is our intention to provide an optical card recording and reproducing apparatus that can perform recording and reproducing of 100% of optical data, thereby shortening the access time during recording, and that is also capable of recording to any sector.

c. Means and operation for solving the problem In order to achieve the above object, the present invention provides at least an optical card that includes a track without a pre-record area for dividing the data recording area in the track into a plurality of sectors. In an optical card recording and reproducing device that records and/or reproduces data in sectors by relative reciprocating motion between the optical card and the optical head, the relative reciprocation of the optical card with respect to the optical head in the direction in which tracks extend is performed. The position is detected using an output signal from the means for transporting the optical card, and the recording start point is arbitrarily selected based on the detected result.

According to such an optical card recording and reproducing device, the recording start point for each sector is determined based on the relative positional relationship between the optical head and the optical card, based on the output signal from the optical card transport means that does not depend on the status of recorded sectors. So you can get
Even when using an optical card consisting of a track without a pre-record area such as a sector mark for dividing the data recording area within the track into multiple sectors, you can still use an optical card with a pre-record area such as a conventional sector mark. Data can be recorded and reproduced in both directions of the relative reciprocating motion between the optical card and the optical head, which shortens the access time during recording, and allows recording to any sector. becomes possible.

[Embodiment] First, an example of the configuration of a pre-record format of a track of an optical card used in the optical card recording/reproducing apparatus of the present invention will be described with reference to FIG. Note that the overall configuration of the optical card is the same as that shown in FIG. 5. This track consists of an ID section at both ends and a data section for recording data between them, as in FIG. 6, and the ID section has an ID mark 7 indicating the ID starting point.
a, 7b, and ID8a, 8b in which track information such as a track address is recorded. What differs from FIG. 6 is the data section, which eliminates the pre-record area such as sector marks for each sector so that it can be used with various applications.

FIG. 2 shows an embodiment of the optical card recording and reproducing apparatus according to the present invention using the optical card as described above. In this example, data is recorded and reproduced by moving the optical card 1 across the tracks and moving the optical card 21 in a direction perpendicular to the tracks. The optical card 1 is attached to a predetermined position on the conveyor belt 23 that is passed between the pulleys 22a and 22b, and the motor drive circuit 2
4 drives the motor 25 to reciprocate in the track direction.

An encoder 26 is attached to the motor 25 to detect the position of the optical card 1 with respect to the optical head 21, and its output is supplied to a sector position detection circuit 27.

The optical head 21 is configured to project writing or reading light from a laser diode 21a onto the optical card 1 via an optical system 21b, and make the reflected light enter a detector 21c. The output of the detector 21c is supplied to the demodulation circuit 28 to obtain a readout signal 35, and is also supplied to two focus/track servo circuits to detect a focus error signal and a track error signal, thereby controlling the optical head 21 to focus and Control is performed so that the incident light always follows the tracking direction in a focused state.

The read signal 35 is supplied to the feed troller 30 to detect a data reproduction signal and track address information.

When reproducing data, the controller 30 first outputs a format selection signal 36 indicating the type of track format to the sector position detection circuit 27, and selects the track format. The laser diode 21a outputs low-power reading light via the laser drive circuit 31, controls the drive of the motor drive circuit 24, and outputs the track address information demodulated by the demodulation circuit 28 and the sector position detection circuit 27. Based on the sector position detection signal 37 corresponding to the track format from , a desired sector of a desired track is sought and accessed, and data is reproduced. In addition, in data recording, similarly to the above, first the format selection signal 36 is output to the sector position detection circuit 27, a track format is selected, a desired sector of a desired track on which data is to be recorded is sought, and then the laser High-power writing light is modulated and output from the laser diode 21a via the drive circuit 31 according to the data to be recorded, thereby recording data in the sector.

The sector position detection circuit 27 outputs a sector position detection signal when the optical head approaches a position on the optical card corresponding to a sector division according to the track format selected by the format selection signal 36 from the controller 30. FIG. 3 shows an example of the circuit configuration. This sector position detection circuit 27 includes a format selector 32 that outputs a predetermined value corresponding to the position of the sector break on the optical card to a comparator 33 according to an input format selection signal 36, and an output from the encoder 26. It is comprised of a counter 34 that counts signals, and a comparator 33 that compares the output count value from the counter 34 and a predetermined value output from the format selector 32, and outputs a sector position detection signal when they match. The counter 34 is a reference point for the position of the optical card relative to the optical head (for example, the edge of the optical card or I in FIG.
D mark 7a s 7b etc.). This sector position detection signal is
The controller 30 can determine the desired sector by counting this signal. Of course, such a counter is provided in the sector position detection circuit 27,
The counter value may be given to the controller as a sector number.

Note that the encoder 26 can easily output pulses with a pitch of about 50-100 μm in terms of the length on the optical card, so data can be reproduced from the optical card and recorded on the optical card. The positioning accuracy is sufficient for this purpose.

In addition, in FIG. 2, the encoder 2 attached to the motor 25
Although the position signal of the optical card relative to the optical head is obtained from 6, the position signal may be obtained by attaching a linear encoder to the member that holds the optical card on the conveyor belt.

FIG. 4 shows a flow chart of an example of accessing a specific sector of a specific track in the above-mentioned optical card recording/reproducing apparatus using an optical card having a track in the pre-record format shown in FIG. First, a format selection signal 36 is applied to the sector position detection circuit 27 in order to select the track format of a target specific track.

Next, the ID section shown in FIG. 1 is read to recognize the position of the track on which the optical head is currently irradiating light. The optical head is moved in a direction across the track by the difference from the target specific track position. The ID section is read again and it is recognized whether the optical head has reached the target specific track or not. The optical head is moved repeatedly until it reaches the desired specific track. When recognizing a track, the optical head 21 moves from left to right in the track direction with respect to the optical card 1 shown in FIG. , when moving from right to left (hereinafter referred to as reverse direction)
will recognize the track by reading ID8b. Subsequently, the optical head and the optical card are relatively moved in the track direction on the specific track, and the sector position detection signals output from the sector position detection circuit 27 are counted.

A counter for counting this sector position detection signal is reset in advance each time the direction of movement changes. When the count value matches the target sector number, access to that sector ends. Here, sector numbers are recognized as follows. That is, for example, when accessing a sector in a track with a track format in which one track consists of four sectors, if the access is in the forward direction, the count value = 1 becomes the sector number = 1, and the count value =
2 is sector number = 2, count value = 3 is sector number =
3, and the count value=4 corresponds to the sex number=4, respectively. Also, if the same access is performed in the opposite direction, the count value =
1 is sector number = 4, count value = 2 is sector number =
3, the count value=3 corresponds to the sector number=2, and the count value=4 corresponds to the sector number=1. Motor drive circuit 2 recognizes whether forward direction access is reverse direction access.
4, it can be easily done from a signal instructing in which direction the motor should be rotated.

According to such an optical card recording/reproducing device, even if an optical card is used that has a track without a pre-record area for dividing the data recording area within the track into multiple sectors, multiple sectors can be recorded on one track. Furthermore, since the recording start point for each sector is determined based on the output of a sector position detection circuit that does not depend on the status of recorded sectors, it is possible to record to any sector within one track. . Furthermore, when recording and reproducing data in both forward and reverse directions to shorten access time, when recognizing a sector number from the count value of the output of the sector position detection circuit, the method of recognition is either forward access or reverse access. This can be easily achieved by simply switching.

[Effects of the Invention] According to the optical card recording/reproducing device as described above, the relative positional relationship between the optical head and the optical card is determined based on the output signal from the optical card transport means that does not depend on the state of recorded sectors. Since the recording start point for each sector can be obtained, even when using an optical card consisting of a track without a pre-record area such as a sector mark for dividing the data recording area within a track into multiple sectors, it is possible to obtain a recording start point using conventional sector marks. As in the case of using an optical card with a pre-record area such as, data can be recorded and reproduced in both directions of relative reciprocating motion between the optical card and the optical head, thereby shortening the access time during recording. It also allows recording to any sector.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of prerecording of an optical card; FIG. 2 is a diagram showing an embodiment of the present invention; and FIG. 3 is a block diagram showing an example of the construction of the sector position detection circuit in FIG. 4 is a flowchart showing the ACCEF operation, FIG. 5 is a diagram showing an optical card, FIG. 6 is a diagram showing an example of pre-recording of a conventionally used optical card, and FIG.
FIG. 3 is a diagram illustrating a conventional recording method. 1... Optical card, 2... Track, 27... Sector position detection circuit, 36... Format selection signal 37
... Sector position detection signal patent applicant Olympus Optical Industry Co., Ltd. Co1 1J1 Figure 2 ε Miku! Figure 3 Happy Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1. Relative reciprocation between the optical card and the optical head for an optical card including at least a track without a pre-record area for dividing the data recording area in the track into a plurality of sectors. In an optical card recording and reproducing device that records and/or reproduces data in sectors by movement, the relative position of the optical card with respect to the optical head in the direction in which the track extends is determined by an output signal from a means for transporting the optical card. An optical card recording/reproducing device characterized by detecting and arbitrarily selecting a recording start point based on the detected result. 2. The optical card recording and reproducing method according to claim 1, wherein the relative position of the optical card with respect to the optical head is detected from the rotation degree of a motor that drives a carrier that transports the optical card. Device. 3. The optical card recording/reproduction according to claim 1, characterized in that a position detector is provided on a member that holds the optical card on a carrier to detect the relative position of the optical card with respect to the optical head. Device. 4. Based on the recording format selected when recording data on the optical card, determine the position of the sector on the optical card, count the number of sectors that the optical head should pass as the optical card is transported, and calculate the count number. Claim 1, characterized in that a desired recording start point is determined from
, 2 or 3. The optical card recording and reproducing device according to item 2 or 3. 5. When reproducing data from the optical card, determine the position of the sector on the optical card based on the recording format of the track to be reproduced, count the number of sectors that the optical head passes as the optical card is transported, 4. The optical card recording and reproducing apparatus according to claim 1, wherein the desired reproduction start point is determined from the count number. 6. The transport direction of the optical card is detected from a drive signal for driving a transport body that transports the optical card, and the sector number corresponding to the sector number counter value is determined based on the transport direction. The optical card recording/reproducing device according to scope 1. 7. Number of sectors n determined by the selected recording format
Based on the transport direction of the optical card, the count number is 1, 2, etc.
...n in one direction, sector numbers 1, 2, ...n
and sector numbers n, n-1,... in the other direction.
1. The optical card recording and reproducing apparatus according to claim 6, wherein the optical card recording and reproducing apparatus corresponds to