JPS6173286A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To shift a pick-up to an address position of a desired disk by installing a position detector and a switch to be detected, recording an address at a prescribed number of tracks of a disk for the disk in the initial condition and after that, relating a detecting position of a pick-up to the address. CONSTITUTION:A pair of photodetectors 5 are fitting at a linear motor 4, a scale 6 is installed and plural slits are provided at the interval of 20mum. In an initialized action condition, a limit switch 7 is on, and then, only a prescribed quantity 100mum is shifted in the outer circumferential direction of a light disk 1. In the shifting, the contents of a scale counter 12 become five. A pick-up 2 is shifted in the outer circumferential direction and an address is successively recorded to an address area 1b of respective tracks of the light disk 1. When the initialized action ends, only the prescribed quantity 300mum is shifted in the outer circumferential direction of the light disk 1, and at this time, the contents of the scale counter 12 become 15. An address reading part 11 reads the address from the signal which the pick-up 2 reproduces from the light disk 1.

Description

DETAILED DESCRIPTION OF THE INVENTION B) Industrial Application Field The present invention relates to an apparatus for recording information on a recording medium.

c) In conventional technical information recording and reproducing devices, the optical disc used as the recording medium has a guide groove indicating the information recording position and a track address indicating the physical position formed in advance (59 of Toshiba Review). (Listed in Volume 7, Issue 1984)
In some cases, only a guide groove is formed.

In the case of recording and reproducing information, in the former case, a track address has been formed on the optical disc in advance, so by reproducing this track address, the physical position of the pickup can be easily recognized, and the information can be recorded. and reproduction can be performed appropriately. On the other hand, in the latter case, the physical position of the pickup is recognized by providing a position detector that detects the position of the pickup, and the address signal and information are recorded at the desired position, and the recorded information is then When reproducing, the information is read by reproducing the address signal.

By the way, when an optical disc is mounted, the mounting position may be slightly misaligned, resulting in a misalignment.

The relative relationship between the position of the optical disc and the position of the position detector differs by about 1, for example, 100 μm each time the original disc is loaded. Therefore, even though the position of the pickup is accurately moved to a desired position using a position detector, this position is different from the desired address position of the optical disc.

B) Means for Solving the Problems The present invention provides a position detector for detecting the position of a pickup in a device of a type in which an address is recorded on each track when information is recorded in tracks on a disk; a switch for detecting that the pink-up is located at the reference position of the position detector, and moves the pickup to the reference position in the initial state of the disc;
Addresses are recorded from this position on a predetermined number of tracks on the disk, and when the disk is in a state other than the above-mentioned initial state,
The present invention is characterized in that the address read from the disk is associated with the pickup detection position of the position detector at the time of reading this address, and subsequent movement of the pickup is performed.

(E) Function The present invention records addresses on a predetermined number of tracks on the disk in its initial state, and thereafter, when the disk is loaded, the position detected by the position detector and the pickup position at this time are recorded. By associating the address with
By positioning the disk and the position detector relatively, and using the position detector without being affected by the mounting position of the disk,
The pink-up can be moved to a desired disk address position.

(f) Example FIG. 2 is a schematic diagram showing the structure of an optical disc.

The optical disc (1) has a center hole (1) in order to fix it.
A) is drilled, and concentric or spiral tracks are formed at a pitch of 2 μm in this opening, and one of the radial areas has an address area (where address information for each track is recorded). 1b) is formed, and the other portion is a data area (one) in which document information and the like are recorded. According to the present invention, the address information is recorded when information is recorded on each track. This prevents the reproduction of the address and data contained in the file.

The optical disc (11) is placed on a near motor (4) that moves along a rail (3) arranged in the radial direction.

It was. A pair of optical detectors tf: 1s (5+ (only one shown) is attached to a linear motor (4)K, and these photodetectors (5)
The scale (6) is parallel to the rail (31) between the opposing
) are provided. This scale (61 (420 μm
It has a plurality of slits at intervals, and by counting the number of slits, the amount of movement of the linear motor (4) can be detected.

The limit switch (71 pieces), the optical demoter of the linear motor (4), and the rotating part (8) move the linear motor (4) toward the inner circumference of the optical disk +11 and the outer direction based on the instructions from the control part (9). Move it appropriately.

The word processing unit commander modulates the address generated by the control unit (9) and the data to be recorded, and outputs them to the pickup (2). Along with this output, the address is placed in the address area (1b) of the optical disk (11).

The data is stored in the data area (1C) of the JLA disk (1).
) are recorded respectively.

The address succession unit 0υ reads the address recorded in the address area (1b) of the optical disc (11), and the read address is transferred to the control unit (9).

The scale counter (1'!J) counts the output pulses of the photodetector (51) in the initial state of operation.

Its contents have been cleared and the limit switch (71
After turning on, the above-mentioned counting operation is started. The control section (9) generates an address signal to be recorded on the optical disk fil under the control of the motor drive section (8) as described above.

The operation of this embodiment will be described below with reference to the flowchart of FIG. 5 showing the control program of the control unit (9).

If the loaded optical disc (1) has not yet recorded any information, the control unit (9) enters the initialization state by a key signal from a keyboard (not shown) (step ■), and the motor drive Part (8) is
The linear motor (4) is moved until the inner circumferential helix limit switch (7) of the optical disk (11) is turned on (step ■). When the limit switch (7) is turned on (step ■), the motor drive unit (8) stops the linear motor (4) and moves the optical disk (11) by a predetermined amount toward the outer circumference (step ■). This predetermined amount is 100 μm, and this movement is performed by the scale counter (
This is done by K recognizing that the content of 13 becomes 5.

Next, the control section (9) sequentially generates predetermined addresses and applies them to the signal processing section (1α).

Pick up these addresses at an appropriate time (2
). The pickup (2) moves toward the outer circumference and picks up the address area (
1b) record the addresses sequentially (step ■), such addresses are from 1 to 200, so the addresses are 20
Recorded on 0 tracks.

By the above initialization operation, a single source disk (1) is created.
Address information is recorded on the 200 inner tracks.

Optical disc il+ whose initialization operation has been completed
is installed, the 'J near motor (4
) is moved toward the inner circumference of the optical disk (11 (step ■), and the limit switch (7) is turned on (step ■).

When the limit switch (7) is turned on, the motor drive unit (8) stops the linear motor (4) and moves it by a predetermined amount toward the outer circumference of the optical disk (11) (step ■). This predetermined amount is 500 μm. At this time, the content of the scale counter fi3 becomes 15.

Next, the address reading unit U reads the address from the signal that the Big Atsufgo 2) reproduces from the optical disc (11) (step ■). Here, if the installed state of the optical disc (11) is exactly the same as the installed state at the time of the initialization operation, ,
The address read by the address reading unit (111 is 10
However, as mentioned above, the original disk (1) costs 100. Since a deviation of approximately gm occurs, the address read by the address reading section tt11 is.

It will be one of 50 to 150.

The control unit (9) stores the address read by the address reading unit fi11 in association with the contents of the scale counter at this time (step @), and thereafter uses it as a reference when moving the pickup (2). shall be. IlO, the position of the scale (6) and the position of the optical disc il+ are relatively correlated.

To be more specific, the scale counter (one content 1
5 corresponds to the address n read by the address reading unit (Ill), and when searching for the address N, in this embodiment, if the contents of the scale counter (121 increases by 1, the address increases by 10, so Scale counter Cl
The pickup (2) may be moved until the content of 21 becomes 15←(N-n)/10.

Therefore, regardless of the relative position INK of the optical disc (11) to the scale (6), the scale r (31 is used to pick up the optical disc (11) at any address position (2).
) can be moved.

(G) Effects of the Invention According to the present invention, the pickup can be accurately moved to a desired address position on the disc using a one-position detector without being affected by the mounting state of the optical disc.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, with FIG. 1 being a block diagram, FIG. 2 being a top view of a disk, and FIG. 6 being a flowchart. (11... optical disc, (21... pickup,
(61...Scale, (7)...Limit switch, (9)...Control unit, (12...Scale counter. Question format SANYO Electric Co., Ltd.

Claims (1)

[Claims] (1) In a device that records an address on each track when recording information in the form of tracks on a disk, there is a position detector that detects the position of the pickup, and the pickup is positioned at the reference position of the position detector. In the initial state of the disc, the pickup is moved to the reference position, addresses are recorded from this position on a predetermined number of tracks on the disc, and in a state other than the initial state of the disc, the pickup is moved to the reference position. An information recording and reproducing apparatus characterized in that the address read from the disk is associated with the pickup detection position of the position detector at the time of reading the address, and subsequent movement of the pickup is performed.