JP2766712B2 - Track jump control device of information recording / reproducing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a track jump control device of an information recording / reproducing device that moves a light spot to a target track of an information recording medium.

[Related Art] In recent years, with the development of various information industries, an optical disk device has been receiving attention as a mass storage device. In such an optical disk device, a track jump control system for moving a light spot to a target track on the optical disk is disclosed in, for example, Japanese Patent Application Laid-Open No. 63-1404.
No. 27 discloses this. That is, in this track jump control system, the end point of the kick pulse for accelerating the light spot is regulated by the zero-cross point which is the turning point of the tracking error signal during the track jump, and the braking for decelerating the light spot is performed. The end point of the pulse is regulated by the magnitude of the rate of change of the tracking error signal near the positive / negative conversion zero cross point.

FIG. 3 shows an example of a track jump control device of an optical disk device described in Japanese Patent Application Laid-Open No. 63-140427. In the figure, 1 is a track of an information recording medium (optical disk), 2 is a main spot which is a light converging spot for reproducing a signal from the track 1, and 3 is arranged before and after this main spot 2. A sub-spot, which is a light converging spot for obtaining track groove position control information of the optical disc, is a sub-spot 4. After obtaining optical information by a photodetector in an optical system (not shown), the optical information is photoelectrically converted into an electric signal, and It is a reproduction signal amplifier for amplifying.

Further, from the electrical signal photoelectrically converted after the optical information is obtained from the sub-spot 3, an error signal voltage generation differential amplifier 5 obtains the signal voltage difference to obtain the voltage of the tracking error signal. Voltage S of tracking error signal output from error signal voltage generation differential amplifier 5
_V is amplified by the servo signal amplifier 6. The output signal of the servo signal amplifier 6 is output to the adder 8 via the servo switch 7 for turning on / off the output signal and opening / closing the track servo control system. This adder 8
This is for adding a kick pulse and a brake pulse to the servo switch output signal, and the addition result is output to the current amplifier 9. The current amplifier 9 has a tracking actuator 10 for moving the main spot 2 and the sub spot 3 in a direction perpendicular to the track 1.
Is connected.

The error signal voltage reproducing differential amplifier 5 is connected to a zero-crossing detection circuit 11 for detecting a zero voltage level, which is a turning point of the tracking error signal between positive and negative signs. Reference numeral 12 denotes a jump control sequence circuit for generating an open / close command and a track jump command for the track servo control system. The servo switch 7 is controlled by the open / close command. Further, a kick pulse generating circuit 13 for generating a kick pulse in response to a command from the jump control sequence circuit 12 and a brake pulse generating circuit 14 for generating a brake pulse in response to a command from the zero-cross detecting circuit 11 include the jump control. It is connected to the sequence circuit 12. The outputs of the kick pulse generation circuit 13 and the brake pulse generation circuit 14 are applied to the adder 8.

Also, 16 is the slope detection circuit for detecting the tilt is a spot rate of change with respect to the moving direction of the voltage S _V the tracking error signal. A brake pulse width control circuit 17 whose output is connected to the brake pulse generation circuit 14 is connected to the inclination detection circuit 16.

Reference numeral 18 denotes a pulse generation circuit for determining the operation time of the inclination detection circuit 16. The pulse generating circuit 18, the output signal of the positive and negative conversion zero-cross detection circuit 11 of the voltage S _V tracking error signal and generates a pulse having a constant width T _j. Tracking error signal voltage S _V slope detection circuit 16
, The tracking error signal voltage _SV and the output signal of the pulse generation circuit 18 are input. Here is the output signal of the pulse generating circuit 18, in the interval defined by the leading and trailing edges of the gradient extraction pulse S _P, the inclination is detected for the track position spot movement direction of the tracking error signal.

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

In the track jump control system, the tracking information obtained from the sub spot 3 is converted into a tracking error signal by the error signal voltage generation differential amplifier 5 in a normal reproduction state. The tracking control is performed by the tracking error signal.

That is, at the time of this tracking control, a command is issued from the jump sequence control circuit 12 to close the servo switch 7, and the servo switch 7 is closed. Therefore, the tracking error signal is applied to the tracking actuator 10 via the servo signal amplifier 6, the servo switch 7, the adder 8, and the current amplifier 9. As a result, the tracking actuator 10 controls the main spot 2 so as to be located at the center of the track 1. Then, an appropriate reproduction signal can be obtained from the reproduction signal amplifier 4.

By the way, it is frequently necessary to instantaneously change the signal to be reproduced from the track signal to a signal of an adjacent track. In such a case, the following control is performed.

FIGS. 4 (a) to 4 (d) are for explaining the track jump control operation of the track jump control system. FIG. 4 (a) is a sectional view of a high density information recording medium (optical disc). Figure (b) is a characteristic diagram of voltage S _V of a tracking error signal, and FIG. (c) is a characteristic diagram of the jump voltage applied, Fig. (d) is a characteristic diagram of gradient extraction pulse voltage.

In FIG. 4 (a), a first track 20 currently playing back and a second track 21 scheduled to be played back next.
Is expressed as a spot movement direction distance, that is, a track pitch _PW . Reference numeral 22 denotes a mirror surface sandwiched between the first and second tracks 20 and 21, and W denotes the first surface.
This is the movement width of the spot shown on the track 1 in the figure.

When normal reproduction is performed on the first track 20, the voltage S _V of the tracking error signal becomes equal to that shown in FIG.
At the position indicated by point A in the waveform of the tracking error signal. In the figure, the sub spot 3 is the first track 20
FIG. 7 is a characteristic diagram of the voltage of a tracking error signal obtained when the light-emitting element moves in the direction perpendicular to the track (in the direction of arrow F in FIG. 4A) in order from the mirror surface 22 to the second track 21. When the kick pulse in this state is applied to the servo system, the waveform indicating the voltage S _V of a tracking error signal, the track position in order that the point A → B point → C point → D point in FIG, namely with respect to the spot moving direction Change. Then, the jump applied voltage at each point is as shown in FIG.
As shown in, first kick pulse S _K of the voltage value -V _K is added to the adder 8, the time kick pulse S _K is generated (t ₁ ~t _2), sustained by (pulse width T _KW ). The kick pulse S _K duration (t ₁ ~t _2), the voltage S _V of at tracking error signal to the mirror surface 22, is restricted by zero volts position, i.e. the point B (FIG. (B)) Will be. The output of the zero-cross detection circuit 11 detects the point B applied to the brake pulse generating circuit 14, the voltage applied to the adder 8 is inverted, the brake pulse having a voltage value V _B
S _B. The brake pulse S _B is sustained between t ₂ ~t ₃ (pulse width T _BW).

Such set the brake pulse S duration _B (t ₂ ~t _3), the voltage S _V of first tracking error signal
Positive and negative turning zero-cross point, i.e. at point B in FIG. 4 (b), the slope extraction pulse S _P is, the time t ₂ ~ a width T _j
It occurs between t _4. Is In the tilt detection circuit 16, FIG front edge slope extraction pulse S _P shown in (d) M and a trailing edge N
At a timing based on, for extracting a tracking error signal voltage S _V shown in FIG. (B). Then, in the difference of the two values of the tracking error signal voltage value corresponding to the leading edge M and the trailing edge N of the gradient extraction pulse S _P, the change rate serving inclination j
Is detected with respect to the track position, that is, the spot moving direction.

That is, the tracking error signal voltage in FIG.
Of characteristic points of S _V, it detects a tilt characteristic j between the point B and point E. Tilt information detected is sent from the slope detecting circuit 16 to the brake pulse width control circuit 17, a signal for changing the width of the brake pulse S _B is generated by the magnitude of the inclined-out j. Then, when the slope j becomes larger than a predetermined value,
The width of the brake pulse S _B is narrower, the inclination j is the predetermined smaller than the value when the brake pulse S _B are command is issued so that wider.

Signal for controlling the width of the brake pulse S _B is
The output signal of the brake pulse width control circuit 17 is transmitted to the brake pulse generation circuit 14. Then, as shown in FIG. 4 (c), a predetermined time (t ₂ ~t _3), after persisting the brake pulse, causing an action to terminate the brake pulse.

As described above, the brake pulse width T _BW shown in FIG. 4C corresponds to the track pitch shown in FIG. 4A, and the brake pulse end point C in FIG. It is near the center of the second track 21.

The pulse generation circuit 18 includes a brake pulse generation circuit.
A brake pulse signal is also input from 14, and the gradient extraction pulse _SP is generated only within the brake pulse duration.

As described above, in the pulse generating circuit 18, only in the positive and negative turning zero-cross point near the voltage S _V of at tracking error signal to the mirror surface 22, had become possible to generate a slope extraction pulse S _P.

[Problem to be Solved by the Invention] By the way, in the track jump control system described above, an information recording medium (optical disk) having a track
Of the target track, when attempting to perform a track jump, the fluctuation of the offset of the tracking error signal voltage S _V, the following problems arise. In FIG. 5, the same parts as those in FIG. 4 are denoted by the same reference numerals.

5 (a) to 5 (d) show a case where an offset of a tracking error signal occurs due to an optical system or an electrical system of the information recording apparatus, and FIGS. 4 (a) to 4 (d) respectively. ). according to this,
The width of the kick pulse S _K shown in FIG. 5 (c) is changing with T _KW1 the width T _KW normal values by the offset. This is because the tracking error signal changes from the curve (normal value) represented by the solid line (normal value) in FIG.
This is because the points (A, B) have changed. As a result, the variation width of the kick pulse S _K is shortened from T _KW to T _KW1.
However, the correction of the brake pulse S _B having a width T _BW corresponding to the kick pulse S _K has not been made. Therefore, in such a case, the stability of the track jump operation is impaired.

As described above, in the related art, the occurrence of an offset or the like of the tracking error signal makes it impossible to generate an optimal kick pulse or brake pulse, and there has been a problem that the track jump operation cannot be performed stably.

The present invention has been made in view of the above points,
Even if an offset or the like of a tracking error signal caused by an information recording medium, an optical system or an electric system occurs,
It is an object of the present invention to provide a track jump control device of an information recording / reproducing device capable of generating an appropriate kick pulse and executing a stable track jump operation.

[Means for Solving the Problems] That is, the present invention relates to a reading unit for optically reading a tracking error signal from a track of an optical information recording medium in which a plurality of tracks are arranged adjacent to each other; Kick pulse generating means for generating a kick pulse for causing a light spot irradiated on a track to jump from a first track adjacent to the track to a second track, and a brake for generating a brake pulse following the kick pulse Pulse generating means, middle point detecting means for detecting a middle point between the peak value and bottom value of the tracking error signal read by the reading means, and middle point detecting means for detecting the tracking error signal during the track jump. The kick pulse generator generates the kick pulse Track jump control means for controlling the end point of the kick pulse duration so that the end point of the generated kick pulse duration is regulated at an intermediate position between the first track and the second track; An actuator for moving the reading unit based on the kick pulse and the brake pulse controlled by the jump control unit is provided.

[Operation] In the track jump control device of the information recording / reproducing device according to the present invention, the tracking error signal is obtained by the reading means from the track of the optical information recording medium in which a plurality of tracks are arranged adjacently. In the tracking error signal obtained by the reading means, the middle point between the peak value and the bottom value is detected by the middle point detecting means. A kick pulse is generated by the kick pulse generating means for causing the light spot emitted from the reading means to irradiate the track from the adjacent first track to the second track, and a brake pulse following the kick pulse is generated. When a pulse is generated by the brake pulse generating means, the kick pulse duration generated by the kick pulse generating means depends on the time when the tracking error signal reaches the output level of the midpoint detecting means during a track jump. End points of adjacent first track and second track
The end point of the duration of the kick pulse is controlled by the track jump control means so as to be regulated at the middle position of the track. Then, based on the kick pulse and the brake pulse controlled by the track jump control means, the actuator means moves the reading means.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 relates to one embodiment of the present invention, and is a block diagram of a track jump control device of an information recording / reproducing device. FIGS. 2 (a) to 2 (d) explain the operation of the first embodiment. 2A is a cross-sectional view of an information recording medium (optical disk) showing the location of a track, FIG. 2B is a characteristic diagram of a tracking error signal voltage, and FIG. FIG. 2 (d) is a characteristic diagram of the jump applied voltage, and FIG. 1 and 2
3 (a) to 3 (d), the same parts as those in FIGS. 3 to 5 are denoted by the same reference numerals.

In FIG. 1, 1 is a track, 2 is a main spot which is a light converging spot for reproducing a signal from the track 1, and 3 is an information recording medium (optical disk) arranged before and after the main spot 2. A sub-spot, which is a light convergence spot for obtaining track groove position control information, is a reproduction signal amplifier 4 for obtaining optical information, photoelectrically converting the optical information into an electric signal, and amplifying it.

The electrical signal photoelectrically converted after the optical information is obtained from the sub-spot 3 is used as the error signal voltage generating differential amplifier 5.
In the voltage of the signal voltage difference is taken tracking error signal S _T is obtained. The tracking error signal voltage output from the error signal voltage generation differential amplifier 5 is amplified by the servo signal amplifier 6. The output signal of the servo signal amplifier 6 is output to the adder 8 via the servo switch 7 for turning on / off the output signal to open / close the track servo control system. The adder 8 is for adding a kick pulse and a brake pulse to the servo switch output signal, and the result of the addition is output to the current amplifier 9. The current amplifier 9 has a main spot 2
A known tracking actuator 10 for moving the sub spot 3 in a direction perpendicular to the track 1 is connected.

The aforementioned error signal voltage generating differential amplifier 5, a peak detection circuit for detecting a peak value of the tracking error signal S _T
23, and the bottom detecting circuit 24 for detecting a bottom value of the tracking error signal S _T is connected. Then, the peak value and the bottom value detected by the peak detection circuit 23 and the bottom detection circuit 24 are output to an addition circuit 26 that calculates the sum of the peak value and the bottom value. Note that the peak detection circuit 23 and the bottom detection circuit 24 are controlled by the jump sequence control circuit 12. The output of the addition circuit 26 is
It is supplied to the tracking error signal S _T timing pulse generator 28 with. The timing pulse generating circuit 28, when the tracking error signal S _T in the track jump has reached the potential corresponding to the sum of the peak value and the bottom value, kick pulse width control circuit generates a pulse
Output to 30. The kick pulse width control circuit 30 receives the timing pulse from the timing pulse generation circuit 28 and controls the kick pulse width. The output of the kick pulse width control circuit 30 is output to the kick pulse generation circuit 13.

The output of the error signal voltage generating differential amplifier 5 is a zero-crossing detection circuit 11 for detecting a zero voltage level, which is a turning point between the positive and negative signs of the tracking error signal.
Is also output to The detection output of the zero cross detection circuit 11 is output to the timing pulse generation circuit 27. The output of the timing pulse generating circuit 27, together with the tracking error signal S _T, is output to the tilt detection circuit 16 for detecting the tilt is a spot rate of change with respect to the moving direction of the voltage of the tracking error signal S _T. A brake pulse width control circuit 17 whose output is connected to the brake pulse generation circuit 14 is connected to the inclination detection circuit 16.

The jump control sequence circuit 12 is for generating an open / close command and a track jump command for the track servo control system. The servo switch 7, the zero-cross detection circuit 11, the kick pulse generation circuit 13, the brake pulse generation circuit 14, The control of the detection circuit 23 and the bottom detection circuit 24 is performed. Further, the kick pulse generation circuit 13 and the brake pulse generation circuit 14 output the generated pulses to the adder 8.

Next, the operation of this embodiment will be described with reference to FIGS. 2 (a) to 2 (d).

Offset occurs in the tracking error signal S _T, the ordinary normal waveform as shown by a solid line In Fig. 2 (b), negative as indicated by the dashed line (-) in the side Δ
Consider a waveform shifted by V. here,
The peak value and the bottom value of the waveform of a normal tracking error signal S _T, respectively and a and -a.

Here, the threshold value for determining a kick pulse S _K and timing of the brake pulse S _B of the tracking signal is obtained as follows.

When the power of the information recording / reproducing apparatus is turned on, first, focus control is performed to control the main spot 2 focused on the optical disc to be in a focused state. Next, on the optical disk, the main spot 2 is moved to a home position provided on the inner peripheral side of the user area. The movement to the home position is performed by first emitting light outside the user area so that the power control mechanism of the main spot 2 does not break down and emit light with an abnormally large amount of light to destroy the user area. The main purpose is to make sure. With the movement to the home position, the main spot 2 crosses several tracks. At this time, the peak value and the bottom value are detected as an initial setting, and the kick pulse _SK and / or the kick pulse SK are detected. or threshold that determines when the brake pulse S _B is held is calculated.

Also, the main spot 2 once moved to the home position is moved to the user area as the next stage. This operation is performed by moving an optical pickup (not shown) at a very low speed by a predetermined pitch of an external scale in the outer peripheral direction of the optical disk by a voice coil motor (VCM). Here, the external scale is a position scale having a pitch of several tens of track pitches such as a moire scale, a magnetic scale, and a potentiometer. The above-mentioned predetermined pitch set here may be any value that is sufficient to enable the main spot 2 to move into the user area. By moving to the user area, an address signal provided on a track in the user area can be read, and the irradiation position of the main spot 2 in the user area can be recognized. In this way, by recognizing the current position of the main spot 2, the difference between the current position and the target position is calculated, and by moving the main spot 2 by the difference, the movement to an arbitrary target track is performed. Becomes possible. With the move to these user area, since the cross the How many of the tracks on the optical disc, detects the peak value and bottom value at this time, the timing of the kick pulse S _K and / or the brake pulse S _B The threshold to be determined may be calculated and stored.

Furthermore, instead of detecting the peak and bottom values as moving between tracks for other purposes, as in the two methods described above, the forced operation is performed only for detecting the peak and bottom values. It is also possible to set a sequence that performs a jump operation.

That is, when the power is turned on, a threshold is first set as the main spot 2 moves as an initial setting. Specifically, as shown in FIG. 2A, the peak value (a-ΔV) and the bottom value (-a-
ΔV) is detected by the peak detection circuit 23 and the bottom detection circuit 24, respectively. On the basis of these values, a potential obtained by adding the values detected by the peak detection circuit 23 and the bottom detection circuit 24 in the addition circuit 26, that is, (a−ΔV) + (− a
−ΔV) = − 2ΔV is calculated and stored in the timing pulse generation circuit 28 as a threshold value.

Then, when the track jumps after setting the threshold value, that is, as shown in FIG.
Second track adjacent to the track with a track pitch _PW
The track jump for moving to 21 is executed as follows.

That is, when the tracking error signal _ST is offset as shown by the above-mentioned broken line, the light beam on the first track 20 is slightly shifted with respect to the center position X1 of the _first track 20. It follows the shifted position X ₁ ′. Similarly, it is considered that an equivalent offset exists in the second track 21 adjacent to the first track 20. Therefore, the light beam on the second track 21 is
A position slightly shifted from the center position X2 of the _second track 21
It is expected to follow X ₂ '. Thus, the track jumping operation, the target position instead X _2, preferably controlled as X ₂ '.

Here, when a track jump command is input from a higher-level controller (not shown) to the jump sequence control circuit 12, the command is received from the jump sequence control circuit 12 and kicking is performed as shown in FIG. pulse generation circuit 13 starts to output the kick pulse S _K. As a result, the light converging spot moves to the position X ₁ ′ shown in FIG.
From the direction shown by arrow F. At the same time, the tracking error signal S _T is changed to the waveform as indicated by the dashed line from point A 'in FIG. (B).

Incidentally, the timing generating circuit 28, the tracking error signal S _T is at point B 'it reaches the the sum of the peak value and the bottom value mentioned above -2DerutaV (FIG. 2 (b)),
As the kick pulse S kick pulse width control circuit 30 Beku ends the output (see FIG. (C)) that the _K outputs a timing pulse. Thus, the kick pulse width control circuit 30
The kick pulse generation circuit 13 is controlled to generate a kick pulse having a width T _KW ′.

Thus, the kick pulse width T shown in FIG.
_KW 'corresponds to the track pitch shown in FIG.

Meanwhile, B of the timing pulse generator circuit 28 'detects the output of the point is also added to the jump sequence control circuit 12, B by driving the brake pulse generating circuit 1' to rise a brake pulse S _B at the point.

The tracking error signal S _T is, the zero-cross point where the polarity is converted, i.e. if reaches the point B in FIG. (B), pulse to tilt detection circuit 16 receives this from the timing pulse generating circuit 28 Is generated. Thus, the timing pulse generating circuit 27, T _j times the generated gradient extraction pulse S _P is, in the tilt detection circuit 16, a tracking error signal corresponding to the leading edge M and the trailing edge N
At the difference between the voltage value binary value of S _T, it is detected as the gradient characteristic j. Tilt information detected is sent from the slope detecting circuit 16 to the brake pulse width control circuit 17, a timing signal for changing the width of the brake pulse S _B is generated by the magnitude of the inclined-out j. When the inclination j is greater than a predetermined value, the width of the brake pulse S _B is narrower, the inclination j is the predetermined smaller than the value when the brake pulse S _B are command is issued so that wider.

Signal for controlling the width of the brake pulse S _B is
The output signal of the brake pulse width control circuit 17 is sent to the brake pulse generation circuit 1. And FIG. 2 (c)
As shown in a predetermined time, for example, the time becomes the width T _BW of the brake pulse, after persisting the brake pulse S _B, causing an action to terminate the brake pulse.

As described above, the brake pulse width _TBW shown in FIG. 2C also corresponds to the track pitch shown in FIG. Accordingly, FIG. (B) brake pulse S 'a point, residual speed of the track jump becomes substantially zero, closing the servo switch 7 D at the end of the brake pulse' end point C of the _B stable servo pull-in point It can be performed. This corresponds to the position X2 'of the second track 21.

As shown in the conventional example of Japanese Patent Application Laid-Open No. 63-140427, a fixed time may be set for the brake pulse in accordance with the design value of the track pitch.

In the above-described embodiment, the track jump control device using the high-density information recording medium as the optical disc has been described. However, the present invention is not limited to this, and may be applied to, for example, a needle-type disc reproducing device or an optical card recording and reproducing device. Good thing.

Further, the present invention is not limited to the above-described embodiments and drawings, and can be variously modified without departing from the gist of the invention.

[Effects of the Invention] As described above, according to the present invention, a stable track jump operation can be performed even when an offset or the like of a tracking error signal due to an information recording medium, an optical system, or an electric system occurs. A track jump control device of an information recording / reproducing device that can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram of a track jump control device of an information recording / reproducing device showing one embodiment of the present invention, and FIGS. 2 (a) to 2 (d) are track jump control devices of the information recording / reproducing device of FIG. 2 (a) is a cross-sectional view of an information recording medium (optical disc) showing the location of a track, FIG. 2 (b) is a characteristic diagram of a tracking error signal voltage, and FIG. 2 (c). ) Is a characteristic diagram of a jump applied voltage, FIG. 2D is a characteristic diagram of a slope detection pulse voltage, FIG. 3 is a block diagram showing an example of a track jump control device of a conventional optical disk device, and FIG. 4 (a) to 4 (d) illustrate a track jump control operation of the track jump control device of FIG. 3, and FIG. 4 (a) is a sectional view of a high-density information recording medium (optical disk), and FIG. 4 (b). Is the tracking error signal voltage FIG. 4 (c) is a characteristic diagram of the voltage applied to the jump, FIG. 4 (d) is a characteristic diagram of the gradient extraction pulse voltage, and FIGS. 5 (a) to (d) are the information recording media of FIG. FIG. 5 (a) is a cross-sectional view of a high-density information recording medium (optical disc) when an offset of a tracking error signal caused by an optical system or an electric system occurs. FIG. 5B shows a characteristic diagram of a tracking error signal voltage, FIG. 5C shows a characteristic diagram of a jump applied voltage, and FIG. 5D shows a characteristic diagram of a gradient extraction pulse voltage. 1 ... track 2 ... main spot 3 ... sub spot 4 ... reproduced signal amplifier 5 ... differential amplifier 6
…… Servo signal amplifier, 7 …… Servo switch, 8 ……
Adder, 9 current amplifier, 10 tracking actuator, 11 zero cross detection circuit, 12 jump sequence control circuit, 13 kick pulse generation circuit, 14
…… Brake pulse generation circuit, 17 …… Brake pulse width control circuit, 20 …… First tracking, 21 …… Second track, 23 …… Peak detection circuit, 24 …… Bottom detection circuit, 26 …… Addition Circuit, 28 timing pulse generation circuit, 30 kick pulse width control circuit

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G11B 21/08 G11B 7/085

Claims (1)

(57) [Claims] 1. A reading means for optically reading a tracking error signal from a track of an optical information recording medium in which a plurality of tracks are arranged adjacent to each other; Kick pulse generating means for generating a kick pulse for causing a track jump from a first track adjacent to a track to a second track; brake pulse generating means for generating a brake pulse following the kick pulse; A middle point detecting means for detecting a middle point between the peak value and the bottom value of the tracking error signal which is read, and according to a point in time when the tracking error signal reaches an output level of the middle point detecting means during the track jump. End of the kick pulse duration generated by the kick pulse generating means. Track jump control means for controlling an end point of the duration of the kick pulse so that a point is regulated at an intermediate position between the first track and the second track; and the kick controlled by the track jump control means. A track jump control device for an information recording / reproducing apparatus, comprising: an actuator means for moving the reading means based on a pulse and the brake pulse.