JPH087297A - Optical information recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent the delay of operation for information recording/ reproducing by providing a light shielding plate in a carriage and a position detector for detecting the change of a relative position between an optical head part and an optical card. CONSTITUTION:This device comprises an optical head part (1-10) converging a light beam on an optical card 101 and performing information recording or reproduction and an oscillating wave driving means composed of the oscillator (USM) 21 of an ultrasonic wave driving device relatively moving the optical head part and the optical card. A position detecting means comprises a position detector 13 and a light shielding plate 12 on the inner surface of a carriage 11 and detects the change of the relative position between the optical head part and the optical card. A control means MPU 5 drives the oscillating wave driving means at the time of start up by the driving frequency complied with a relative velocity at the time of ordinary driving. When the position detecting means does not detect the prescribed positions of the optical head part and the optical card 101 in a prescribed time, the driving frequency at the time of start up is further changed to a driving frequency complied with high-speed drive.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information recording / reproducing apparatus for optically recording or reproducing information by scanning a light beam on an information track by relatively reciprocating an information recording medium and an optical head. It is about.

[0002]

2. Description of the Related Art In recent years, as an information recording / reproducing apparatus for recording / reproducing information on / from a recording medium, an optical information recording / reproducing apparatus for optically recording / reproducing by using a light beam has been attracting attention. There are disc-shaped and card-shaped recording media for optically recording and reproducing information. Among them, the card-shaped recording medium (hereinafter referred to as an optical card) has high productivity, portability, and accessibility. It is excellent and has a wide range of uses. As a method of relative scanning between the optical beam and the optical card, one of the methods conventionally proposed is to mount the optical card on a carriage and use an optical head that emits the optical beam using a voice coil motor on the optical card. Scanning is carried out in the direction parallel to the track, while the carriage is moved in a direction perpendicular to the scanning direction by using an ultrasonic driving device. In this ultrasonic driving device, for example, an elliptical vibrator is attached to a carriage,
A linear portion on one side of the vibrator is brought into pressure contact with a guide plate, which is a rail-shaped stator provided in the main body of the information recording / reproducing apparatus, and frequency voltages having different phases are applied to the driving piezoelectric element of the vibrator. As a result, a traveling wave is formed in the elastic body to which the piezoelectric element is joined, and the vibrator is moved with respect to the guide plate. The oscillator of the ultrasonic driving device is hereinafter referred to as USM.

As an optical information recording / reproducing apparatus having the above-mentioned structure, Japanese Patent Application No. 5-289804 has been proposed by the present applicant.

FIG. 8 is a block diagram showing this optical information recording / reproducing apparatus. In FIG. 8, reference numeral 1 denotes a photodetector for detecting reflected light from two light spots for tracking control, which are emitted from a semiconductor laser as a light source to an optical card. The two light spots for tracking control are generated, for example, by dividing a light beam of a semiconductor laser into a main beam and two side beams, and two of these side beams are used as an optical card for tracking control. 2 on each side of the information track
The tracking track of the book is illuminated. The photodetector 1 includes detection pieces 1a and 1b corresponding to the two light spots, and the reflected lights of the two light spots reflected from the tracking track are detected by the detection pieces 1a and 1b, respectively. The detection signals of the detection pieces 1a and 1b are differentially detected by the differential amplifier 2 and output as a tracking error signal. The tracking error signal is binarized by the comparator 10 at a predetermined slice level and output to the MPU 5. The MPU 5 is a microprocessor circuit for controlling each part of the device.

Reference numeral 3 is a differential amplifier to which a predetermined voltage is input from the MPU 5 via the D / A converter 4 when a track jump is performed by the objective lens 9. However, at the time of track jump, the tracking servo loop is turned off by a switch (not shown). Also, at the time of this track jump, the tracking error signal of the differential amplifier 2 is binarized by the comparator 10 and input to the MPU 5.
Based on this input signal, the MPU 5 controls the light beam to be drawn into the target information track again at the zero cross point. Reference numeral 6 is a phase compensator for stabilizing the tracking servo loop, and 7 is power amplification of a tracking error signal to perform a tracking actuator coil (AT coil) 8
Is an AT coil driver for driving the light source, and 9 is an objective lens for condensing the light beam of the semiconductor laser of the light source and irradiating it as a minute light spot on the optical card. The tracking error signal detected by the differential amplifier 2 is passed through the differential amplifier 3, the phase compensator 6, and the AT coil driver 7 to A
Tracking control is performed in which the light spot is output to the T coil 8 and the AT coil 8 is driven by a tracking error signal, and the objective lens 9 is finely moved in the tracking direction to scan the light spot by following the information track.

Reference numeral 14 is a D / A converter for applying an analog voltage to a voltage controlled oscillator (VCO) 15 based on an instruction from the MPU 5. The VCO 15 performs voltage / frequency conversion by changing the frequency of the output signal according to the input voltage, and outputs the output signal f having a frequency corresponding to the input voltage.
d is output. 16 is VC based on the instruction of MPU5
A pulse width setting circuit for converting the pulse width of the output signal fd of O15 into an output signal fw having a predetermined pulse width. Reference numeral 17 divides the output signal fw of the pulse width setting circuit 16 by 4 and divides the divided signal. It is a ring counter for dividing into four sets of signals and for shifting the phases of the four sets of signals by 90 degrees and outputting them. 18 is the US output from MPU5
ON to instruct M21 to drive or stop
/ OFF drive signal and USM21 forward rotation,
It is a changeover switch for selectively outputting the output signal of the ring counter 17 based on the FWD / REV signal indicating the reverse rotation or the rotation direction. Reference numeral 19 is a drive circuit for power amplifying the output of the changeover switch 18, 20 is a booster circuit for boosting the output of the drive circuit 19, 2
Reference numeral 1 is a USM for moving the carriage on which the optical card 101 is mounted in the track crossing direction.

FIG. 12 is a plan view showing the recording surface of such an optical card. 101 is an optical card, 102 is an information recording area, 103 is an information track, 104 and 104 'are track selection areas respectively, and 105 is an optical disk. This is the home position of the spot. Reference numeral 106 denotes an area where the recording layer exists, and the home position 105 is included in this area.

Next, the operation of the above conventional example will be described.

First, when the optical card is inserted into the device,
An optical card is introduced into the apparatus by a loading motor (not shown) and mounted on the carriage.

Next, the USM 21 is driven to drive the carriage on which the optical card is placed in the transverse direction of the track on the optical card to set the position of the light beam to the home position 105 in FIG.
Located in.

The control operation of the USM 21 will be described. First, FIG. 9 is a time chart showing the signals of the respective parts of the control circuit for controlling the drive of the USM 21.
Is the output signal of the VCO 15, and (b) is the pulse width setting circuit 1.
6 output signal. During operation of the device, a predetermined voltage is input from the MPU 5 to the VCO 15 via the D / A converter 14, and the VCO 15 converts the input voltage into a frequency as shown in FIG. A pulse signal having a predetermined frequency is output. Also, MP
A control signal for instructing the pulse width is output from U5 to the pulse width setting circuit 16, the pulse width setting circuit 16 sets the pulse width based on the instruction, and the pulse width of the instructed pulse width is set as shown in (b). A pulse signal is output. The ring counter 17 divides this pulse signal by four and divides the phase of the divided signal by 9 as shown in (c) to (f) of the figure.
It is separated into four sets of signals that are shifted by 0 degrees, and this is signal A
It is output as ₁ , A ₂ , and B ₁ , B ₂ . The output signal of the ring counter 17 is output to the changeover switch 18,
With the changeover switch 18, an O command for driving from the MPU 5 is issued.
N / OFF drive signal, FWD / RE indicating the direction of rotation
The USM 21 is driven based on the V signal. When the normal USM 21 is not driven, the MPU 5 outputs an off signal to the changeover switch 18, and the changeover switch 18 does not output a signal to the drive circuit 19 according to this instruction.
USM 21 is maintained in a stopped state. The MPU 5 outputs an ON signal for instructing the drive of the USM 21 to the changeover switch 18. At the same time, the MPU 5 outputs a signal indicating the direction of the USM 21 to the changeover switch 18. Although the signal indicating the direction is shown as the FWD / REV signal in FIG. 8, the FWD signal is output when the forward direction is specified, and the REV signal is output when the reverse direction is specified. Furthermore, MPU5
Then, when outputting an ON signal for instructing to drive the USM 21, a control signal is output to the pulse width setting circuit 16 so as to gradually widen the pulse width for a fixed time. Further, even when the USM 21 is stopped, the control signal is output so that the pulse width is gradually narrowed for a fixed time.

When the change-over switch 18 receives the ON signal and the signal instructing the rotation direction from the MPU 5, the combination of the four output signals of the ring counter 17 is changed based on the ON signal and the signal is output to the drive circuit 19. MPU
When the rotation in the forward direction is instructed from 5, the changeover switch 18 sets the output signals A ₁ , B ₁ of the ring counter 17 to C, D, A ₂ and B ₂ as E and F as shown in FIG. Output. In addition, when the reverse rotation is instructed,
As shown in FIG. 1, A ₂ of the output signal of the ring counter 17,
B ₂ is output as C, D, A ₁ and B ₁ are output as E, F. As a result, in the drive circuit 19, the phase of 90 is determined based on the signals C, D and E, F of the output signal of the changeover switch 18.
Two sinusoidal drive signals that are deviated from each other are generated, and sinusoidal voltage amplitudes corresponding to the pulse widths are applied to the terminals G and H of the USM 21 via the booster coil 20.

Then, a light beam emitted from a semiconductor laser (not shown) is divided into three beams by a grating (diffraction grating), and of the light beams reflected by the optical card 101, a focusing (AF) spot which is a center light. Focusing at. Next, the USM 21 is driven again, the carriage is further moved, the light beam is driven so as to cross the information track 103, and the predetermined track position is accessed by counting the number of crossed tracks with the output of the comparator 10 by the MPU 5. . Then, the tracking servo is closed by a switch (not shown) to bring it into a tracking state, and the driving device (not shown) scans the optical head in the direction parallel to the track to record or reproduce information.

[0014]

In the above-mentioned conventional example, after the optical card 101 is introduced into the apparatus, the carriage 11 on which the optical card is mounted is moved in the track traversing direction on the optical card 101 to set the light beam position to the home position 105. However, the carriage 11 is moved by giving the USM 21 a pulse width corresponding to a constant drive frequency and drive voltage amplitude.

However, due to the characteristic of the USM 21 that it rotates by pressure contact, if it is left in a stopped state for a long time, a sticking phenomenon may occur in which the motor does not rotate even when a voltage is applied.

FIG. 2 is an fv diagram showing the relationship between the drive frequency (f) of the USM 21 and the moving speed (v) of the carriage. This is the relationship at constant drive voltage amplitude (constant pulse width). Now, when v ₀ is required as the carriage movement speed and the drive frequency is set to f ₀ , normally the drive frequency is f ₀ and the carriage movement speed is the maximum v _0.
Occurs, and by adjusting the drive voltage with the pulse width, v
_It can be driven at a speed of ₀ or less. However, if the USM 21 is left in a stopped state for a long time, it may not start at the drive frequency f ₀ , or smooth rotation may not be possible. In this case, the target carriage movement speed cannot be obtained. Since the shuttle moving speed is lower than the target speed, the seek time for relatively moving the objective lens and the information track at the time of recording / reproducing information increases the moving time to the target information track. was there.

[0017]

According to a first aspect of the present invention, there is provided an optical head section for recording or reproducing information by converging a light beam on an optical information recording medium having a large number of tracks. In an optical information recording and / or reproducing apparatus having a vibration wave driving means for relatively moving the optical head section and the optical information recording medium, and a control means for drivingly controlling the vibration wave driving means, the optical head Position detecting means for detecting a change in relative position between the optical information recording medium and the optical information recording medium, and the control means sets the drive frequency given to the vibration wave driving means to the relative speed at the time of normal driving at the time of starting. When driving at a corresponding driving frequency and the position detecting means does not detect a predetermined position of the optical head portion and the optical information recording medium within a predetermined time, the driving frequency at start-up corresponds to higher speed driving. Do And wherein the changing the dynamic frequency.

With this configuration, when the vibration drive means cannot be driven at the drive frequency during normal startup, the drive frequency is sequentially changed so as to increase the drive speed, so that the vibration wave drive means can be reliably driven.

According to a second aspect of the present invention, in the first aspect, at the time of start-up controlled by the control means, the drive power source is turned on.

In this configuration, the vibration wave driving device can be driven in advance before the use of the device to which the driving power source is turned on,
The vibration wave driving device can be driven for recording and reproduction.

According to a third aspect of the present invention, in the first aspect, the starting time controlled by the control means is the first starting time each time the optical information recording medium is inserted into the apparatus main body. Characterize.

In this configuration, since the drive frequency change control that enables the driving of the vibration wave driving device is performed at the first start-up each time the optical information recording medium is inserted into the apparatus body, the optical information recording is performed last time. It takes a long time to insert the next optical information recording medium after taking out the medium from the main body of the device.
Even if various changes occur in the vibration wave drive during that period,
It is possible to reliably drive the vibration wave driving device.

According to a fourth aspect of the present invention, in the first, second or third aspect, the control means, when the position detecting means detects a predetermined position of the optical head portion and the optical information recording medium,
It is characterized in that the drive frequency is changed to a drive frequency corresponding to the normal drive.

In this structure, if the vibration wave drive device moves,
The vibration wave driving device can be driven at a normal speed.

The invention described in claim 5 is the same as in claim 1,
In 3 or 4, the position detecting means detects the position of the means for mounting the optical information recording medium.

With this configuration, it is possible to detect the position of the means for mounting the optical information recording medium that moves with respect to the main body of the apparatus, for example, the position of the carriage, which simplifies the configuration. You can use interrupters.

According to a seventh aspect of the present invention, an optical head section for recording or reproducing information by condensing a light beam on an optical information recording medium having a large number of tracks, the optical head section and the optical head section are provided. In an optical information recording and / or reproducing apparatus having a vibration wave driving means for relatively moving an information recording medium and a control means for driving and controlling the vibration wave driving means, the optical head section and the optical information recording medium. And a position detecting means for detecting a change in relative position between the vibration wave driving means and the vibration wave driving means when the vibration wave driving means is not driven for a predetermined time. However, when the position detecting means detects a change in the relative position between the optical head portion and the optical information recording medium, the driving of the vibration wave driving means is stopped and the original position is reversely driven. And

With this configuration, the driving state of the vibration wave driving device can be always kept in a good condition and can stand by, and an increase in the moving time to the target information track can be prevented when recording or reproducing information. You can

The invention described in claim 8 is characterized in that in claim 7, the position detecting means is an encoder.

[0030]

1 is a block diagram showing a first embodiment of an optical information recording / reproducing apparatus of the present invention.

In FIG. 1, the same parts as those in FIG. 8 are designated by the same reference numerals and the description thereof will be omitted.

Reference numeral 11 denotes a carriage on which the optical card 101 is placed. The position of a light shielding plate 12 provided on the carriage is detected by a position detector 13, and a position detection signal is sent to the MPU 5
Send to.

FIG. 3 is a layout view of the carriage and the position detector used in the first embodiment. Reference numeral 22 denotes a shaft for holding the carriage 11, which has a structure capable of scanning the carriage 11 in the Y direction. There is. Reference numeral 23 is a guide plate, and the USM 21 is in pressure contact with it, so that a driving force can be obtained. When the carriage 11 moves in the Y direction, one end point P of the light shielding plate 12 is detected by the position detector 13.

FIG. 4 is a circuit diagram showing the configuration of the position detector 13 of the embodiment. A current is caused to flow through the light emitting diode PD through the limiting resistor R ₁ to cause light emission, and the phototransistor PTR
To receive light. When the light shielding plate 12 passes by, the PTR receives light, the current flows through R _2, and the potential at the point M rises to near V. Reference numeral 24 is a comparator, which binarizes the signal M and outputs the output signal N to the MPU 5.

FIG. 5 shows the operation of this embodiment, the horizontal axis shows the position in the Y direction, and the vertical axis shows the voltage of the output M in (b).
FIG. 6C is a diagram showing a carriage moving speed, FIG. 7D is a logical level of an output N, and FIG. 9A is a positional relationship between the light shielding plate 12 and a light flux of a position detector 13 using a photo interrupter.

The operation of this embodiment will be described below with reference to FIG.

First, it is assumed that the carriage 11 is located at the initial position before the power of the apparatus is turned on. This position is the position of the carriage 11 when the optical card 101 on the carriage 11 is ejected to the outside of the apparatus.

Here, the operation of moving the carriage to the initial position when the optical card is ejected will be described.

The carriage 11 is moved in the Y direction at a speed v ₀ from the direction of the point A by the USM 21. The position detector 13 is shielded by the light shielding plate 12 up to the point B, the output M is 0 V as shown in (b), and the output N is at H level as shown in (d). At point B, the end point P of the light shielding plate 12 approaches the end portion of the light beam 25 of the position detector 13, and the light beam P
The incidence on TR begins, and the output M gradually increases.
At the point C where M = V _T , the output of the comparator 24 is inverted and the output N becomes L level as shown in (d).

When the MPU 5 receives the output N and becomes the L level, the MPU 5 sends pulse width data for reducing the pulse width to the pulse width setting circuit 16 at a constant rate, decelerates the carriage 21, and then turns it ON. / OFF drive signal O
The FF signal is sent to the switching SW 18 to stop the carriage 11. The stop position is point D. The drive frequency of the USM 21 is f ₀ in FIG. This is the initial position when ejecting the card.

At this point, the power of the device is turned off. Next, when the power is turned on, first, the output N of the position detector 13 is detected by the MPU 5, it is confirmed that the output N is at the L level, and the process proceeds to the next operation.

The MPU 5 sends a voltage corresponding to the driving frequency f ₀ to the D / A converter 14, sets the FWD / REV signal in the -Y direction, turns the ON / OFF signal ON, and sets the USM.
The driving of 21 is started. Since the normal is carriage speed v ₀ at the drive frequency f ₀ is capable of generating, in the start-up after standing may not be able to start in the driving frequency f _0,
The output N of the position detector is detected by the MPU 5 until a predetermined time has elapsed. When the carriage 11 moves in the -Y direction from the point D, the output M decreases, and when it becomes V _T or less at the point C, the output N of the comparator 24 becomes the H level, so that determination can be performed.

If the position detector 13 does not detect the activation of the carriage until the predetermined time has elapsed, it is determined that the activation is not possible at the drive frequency f ₀ , then the drive frequency is set to f _1, and the drive force with stronger thrust is set to the USM 21. Give to.

After that, the position detector 13 is similarly operated until a predetermined time elapses.
The output N of is detected. If it is not started even at f _1, it is changed to f ₂ and the same operation is performed.

If the start can be confirmed at the driving frequency f ₂ at the point C, the operation is stopped and the carriage is moved in the Y direction to stand by at the initial position. When the optical card is introduced, the drive frequency f ₂ is switched to the drive frequency f ₀ that gives a normal speed, the carriage is driven in the −Y direction, stopped at the home position, and emitted from a semiconductor laser (not shown). The light beam is divided into three beams by the grating, and the light beam reflected by the optical card 101 is focused by the focusing (AF) spot which is the center light. Next, the USM 21 is driven again, the carriage is further moved, the light beam is driven so as to traverse the information track 103, and the number of traversing tracks is counted by the output of the comparator 10 by the MPU 5, thereby accessing a predetermined track position. To do.

Then, the tracking servo is closed by a switch (not shown) to bring the tracking state into a tracking state, and the driving device (not shown) causes the optical head to scan in the direction parallel to the track to record or reproduce information.

FIG. 13 is a flow chart showing the operation of this embodiment.

In the above description, when the carriage is at the initial position, the operation from the time when the power is turned on to the standby time is shown.

The power is turned on in step (hereinafter abbreviated as S), and if the output N is at L level in S2, the process proceeds to the next step.
When it is at H level, it is notified to the MPU as an error.

In S3, the -Y direction is designated by the FWD / REV signal, and the process proceeds to S4.

In S4, the MPU 5 sets a value corresponding to the driving frequency f ₀ in the normal state in the D / A converter 14 as the driving frequency f _d , and proceeds to S5.

In S5, the ON / OFF signal is turned ON to start driving the USM 21, the timer is started, and the process proceeds to S6.

In S6, the timer detects whether or not a predetermined time has elapsed. If it is within the predetermined time, the process proceeds to S7, the output N is continuously detected until it becomes H, and if it becomes H, the process proceeds to next S9. However, if a timeout occurs in S6, the process proceeds to S8, it is determined that the drive cannot be started at the drive frequency of f _d = f ₀ , and f _d = f + Δf is set. In the above description, f _d + Δf = f ₁ . Thereafter, Δf is added within a predetermined range to increase the driving speed until moving, f ₁ + Δ
If it is assumed that f = f _{2 and the} activation is detected at f _d = f ₂ as in the above description, the process proceeds to S9 and the ON / OFF signal is turned off.
Stop as F, go to S10, and FWD / REV +
In the Y direction, drive toward the initial position (S1
1) When the output N becomes L level (S12), S13
At, the ON / OFF signal is turned off and the operation is stopped.
The carriage is now in the initial position. Then, it waits until the drive command when the optical card is introduced.

FIG. 6 is a second embodiment showing a circuit in the case where the comparator is provided with hysteresis as the structure of the position detector, and FIG. 7 is a case where the position detector of the second embodiment is used. 6 is a signal diagram showing the operation of FIG. VH is a comparator 25 when the output M changes from a low voltage to a high voltage.
Is the detection level of. _VL is the detection level of the comparator 25 when the output M changes from a high voltage to a low voltage. Then, V _H, V _L is determined by the resistor R ₃ ~ _5.

(D) shows the level of the output N of the position detector 13 when the carriage is moved in the + Y direction, and it is changed from H level to L level at the position H. (E) is the case where the carriage moves in the -Y direction, and the level changes from L to H at position G.

It is assumed that the motor is stopped at point J which is the initial position when the power is turned on. After the MPU 5 detects the output N and confirms that it is at the L level, the USM 21 is driven in the −Y direction at the drive frequency f ₀ and the output N is detected until a predetermined time. When it is determined not to start, the drive frequency is set to f as in the embodiment.
Change it to ₁ , and follow the same procedure to confirm the startup and startup.

In the first and second embodiments, the driving of the optical card by USM is performed in the track crossing direction on the optical card, but it may be in the track traveling direction.

Further, in the first and second embodiments, the driving frequency changing operation is carried out at the time of turning on the power source, but it is also possible to carry out it every time the recording medium such as an optical card is introduced into the apparatus.

In the first and second embodiments, the predetermined position of the optical card is detected by detecting the position of the carriage on which the optical card is placed, but the position of the optical card may be directly detected.

FIG. 14 shows a third embodiment. FIG. 14 is a block diagram showing a third embodiment of the optical information recording / reproducing apparatus of the present invention. In FIG. 14, 101 is an MPU for controlling each device. Reference numeral 102 denotes a time measuring timer built in the MPU 101 or provided externally, and 103 denotes a D / A converter for converting a signal output from the MPU 101 to a voltage controlled oscillator (hereinafter abbreviated as VCO) 104 from a digital signal to an analog signal. , 104
Is a VCO that outputs a frequency according to the output voltage from the D / A converter 103, and 105 is an ON / OFF signal for the USM.
To turn off or divide the signal from the VCO 104 to generate a signal whose phase is shifted by 90 degrees, combine the signals to determine the USM rotation direction, further boost the voltage to an appropriate voltage and send it to the USM 106 Drive circuit, 106
Is a USM for moving the carriage on which the optical card described in the above-mentioned embodiment is mounted in the information track direction,
Reference numeral 07 denotes a carriage for mounting an optical card, reference numeral 108 denotes a linear encoder for generating a carriage movement signal, and reference numeral 109 denotes a carriage position detection circuit for detecting a carriage position signal from the linear encoder.

Next, the operation of this embodiment will be described with reference to FIG. FIG. 15 is a flowchart showing the operation of this embodiment. First, in step (hereinafter abbreviated as “S”) 101, when the start-up process after power-on of the device is completed, or when the MPU 101 drive circuit 105 is set to USM1
From the time when the output of the drive voltage to 07 was stopped (command),
The MPU 101 issues a command to the timer to measure the set time (S
102). Therefore, in S102, when the timer 102 measures the time for the set time, the MPU 101
A measurement end signal is output to and measurement for the set time starts again.
Here, if the MPU 101 commands the drive circuit 105 to output a signal to the USM 106 during the set time measurement, the set time measurement is stopped. And
When the timer 102 outputs an end signal for measuring the set time to the MPU 101, the MPU 101 sends a signal for the preliminary operation preset in order to make the USM 106 perform the preliminary operation in S103.
Through the VCO 104. As a result, the VCO 104
Drives the pulse output of the frequency for preliminary operation
5 and the voltage output from the drive circuit 105 causes the USM 106 to perform a preliminary operation. When the USM 106 performs the preliminary operation, the carriage 107 starts moving in the information track crossing direction, and the linear encoder 108 outputs a pulse signal to the carriage position detection circuit 109.

The carriage position detection circuit 109 detects the movement of the carriage by the input of the pulse signal, and in S104, counts the number of pulses to detect the position of the carriage and outputs it to the MPU 101. Therefore, when the MPU 101 determines that the count has reached a predetermined amount and the carriage has moved by a certain amount, the MPU 101 performs the S
At 105, the USM control circuit 105 is instructed to stop the USM6.

Next, in order to return the carriage to the original position before the movement, in S106, the MPU 101 specifies the direction to the drive circuit 105, and commands the drive circuit 105 to move in the direction opposite to the movement direction so far. The carriage has moved in the opposite direction, and in S106, the carriage movement amount is counted by the shuttle position detection circuit 109 for the pulse signal from the linear encoder 108, and the count has reached a predetermined amount, and the carriage has returned to the original position before movement. After the MPU 101 confirms, the MPU 101 commands the drive circuit 105 to stop the movement of the carriage in S108,
At 108, the carriage is stopped. And S10
Return to 1 timer start.

Although the carriage is moved in the information track crossing direction in the third embodiment, the carriage is fixed in the information track crossing direction and the optical head may be moved in the information track crossing direction by driving the USM. Good.

If the above preliminary operation causes a disadvantage in other operations in the optical information recording / reproducing apparatus, a preliminary operation inhibition period is provided, and if the set time measurement end falls within the inhibition period, the preliminary operation is performed. This should be done after the operation prohibition period ends.

Further, the carriage position detecting means is not limited to the linear encoder and may be any means capable of detecting the position of the carriage.

[0067]

According to the invention described in claim 1, when the vibration driving means cannot be driven at the driving frequency at the time of normal startup,
Since the driving frequency is sequentially changed so as to increase the driving speed, the vibration wave driving means can be driven reliably, and the vibration wave driving device for recording or reproducing information can be surely started.

According to the second aspect of the invention, the vibration wave driving device can be driven in advance before the use of the device to which the driving power source is turned on, and the vibration wave driving device can be driven for recording and reproduction. .

According to the third aspect of the invention, the drive frequency change control that enables the driving of the vibration wave drive device is performed at the first start-up each time the optical information recording medium is inserted into the device body. , It takes a long time until the next optical information recording medium is inserted after the optical information recording medium was taken out from the device body last time, and even if various changes occur in the vibration wave driving device during that time, the The wave drive can be driven.

According to the fourth aspect of the invention, if the vibration wave driving device moves, the vibration wave driving device can be driven at a normal speed thereafter, and information recording or reproduction can be performed as it is.

According to the invention described in claim 5, means for mounting the optical information recording medium which moves with respect to the apparatus main body,
For example, because the position of the carriage can be detected,
The configuration is simplified, and a photo interrupter can be used as this concrete example.

According to the invention described in claim 7, the driving state of the vibration wave driving device can always be kept good and can stand by, and at the time of recording or reproducing information, the information track of the target information track is read. It is possible to prevent an increase in travel time.

According to the invention described in claim 8, since the encoder is also used as the position detecting means, the position can be detected with high accuracy.

[Brief description of drawings]

FIG. 1 is a block diagram of an optical information recording / reproducing apparatus showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between a USM driving frequency and a carriage moving speed.

FIG. 3 is a plan view showing a positional relationship between a carriage and a position detector in FIG.

FIG. 4 is a circuit diagram of the position detector in FIG.

5 is a signal line diagram showing the operation of the first embodiment of FIG. 1. FIG.

FIG. 6 is a circuit diagram showing a configuration of a second embodiment of the position detector.

7 is a signal diagram using the position detector of FIG.

FIG. 8 is a block diagram of a conventional optical information recording / reproducing apparatus.

9 is a timing chart of USM driving in the apparatus of FIG.

FIG. 10 is a diagram showing an output signal of a ring counter.

FIG. 11 is a diagram showing an output signal of a ring counter.

FIG. 12 is a plan view of an optical card.

FIG. 13 is a flowchart showing the operation of the first embodiment.

FIG. 14 is a block diagram showing a third embodiment.

FIG. 15 is a flowchart showing the operation of the third embodiment.

[Explanation of Codes] 1 ... Photodetector 2, 3 ... Differential amplifier 4 ... D / A converter 6 ... Phase compensator 7 ... AT coil driver 8 ... AT coil 9 ... Objective lens 10 Comparator 11 ... Carriage 12 ... Shading plate 13 ... Position detector 14 ... D / A converter 16 ... Pulse width setting circuit 17 ... Ring counter 20 ... Boosting coil 21 ... USM

Claims (8)

[Claims] 1. An optical head section for recording or reproducing information by converging a light beam on an optical information recording medium having a large number of tracks, and a relative movement between the optical head section and the optical information recording medium. In an optical information recording and / or reproducing apparatus having a vibration wave driving means for controlling the vibration wave driving means and a control means for driving and controlling the vibration wave driving means, a change in relative position between the optical head part and the optical information recording medium is performed. Position detecting means for detecting
The drive frequency given to the vibration wave drive means is driven at a drive frequency corresponding to the relative speed at the time of normal drive at the start,
When the position detecting means does not detect the predetermined positions of the optical head unit and the optical information recording medium within a predetermined time, the drive frequency at the time of start is changed to a drive frequency corresponding to higher speed drive. Optical information recording / reproducing device. 2. The optical information recording / reproducing apparatus according to claim 1, wherein at the time of activation controlled by the control means, the drive power is turned on. 3. The optical information recording according to claim 1, wherein the start-up under the control of the control means is the first start-up each time the optical information recording medium is inserted into the apparatus main body. Playback device. 4. The drive means according to claim 1, 2 or 3, wherein when the position detecting means detects a predetermined position of the optical head section and the optical information recording medium, the drive frequency corresponds to a normal drive frequency. An optical information recording / reproducing apparatus characterized by being changed to. 5. The optical information recording / reproducing apparatus according to claim 1, 2, 3 or 4, wherein the position detecting means detects the position of the means for mounting the optical information recording medium. 6. The method according to claim 1, 2, 3, 4, or 5,
The optical information recording / reproducing apparatus, wherein the position detecting means is a photo interrupter. 7. An optical head part for recording or reproducing information by condensing a light beam on an optical information recording medium having a large number of tracks, and a relative movement of the optical head part and the optical information recording medium. In an optical information recording and / or reproducing apparatus having a vibration wave driving means for controlling the vibration wave driving means and a control means for driving and controlling the vibration wave driving means, a change in relative position between the optical head part and the optical information recording medium is performed. Position detecting means for detecting
If the vibration wave driving means is not driven for a predetermined time, the vibration wave driving means is driven by applying a predetermined driving frequency, and the position detecting means moves the relative position between the optical head section and the optical information recording medium. An optical information recording / reproducing apparatus, characterized in that, when a change in position is detected, the driving of the vibration wave driving means is stopped, and the vibration wave driving means is reversely driven to the original position. 8. The optical information recording / reproducing apparatus according to claim 7, wherein the position detecting means is an encoder.