JP2000021075A - Method and device to control jumping retrieval and recording and/or reproducing device of optical disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct a fast and accurate jumping retrieval employing a simple constitution. SOLUTION: Optical beams 4 illuminate the recording surface of an optical disk 1 through an objective lens 3 of an optical pickup device 2. The lens 3 is moved by an objective lens accelerating device 6. An objective lens accelerating signal FCS+ is supplied to the device 6 from an acceleration signal generating device 7. A photodetector 8 of the device 2 detects the reflected light beams of the beams 4 and a defocus signal FE, which indicates that the focus of the lens 3 is deviated from the recording surface, is taken out. Moreover, three state signal F3ST from a microcomputer 11 is supplied to the device 7 and is superimposed to the signal FCS+. Furthermore, a focus position detection signal FZC is formed from the signal FE in a focus position detecting device 12 and is supplied to the microcomputer 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skip search control method and control apparatus suitable for use in, for example, recording / reproducing of an optical disk, and an optical disk recording / reproducing apparatus. More specifically, the present invention quickly and satisfactorily searches for jumps between these layers or tracks on an optical disc provided with multiple layers or a large number of recording tracks.

[0002]

2. Description of the Related Art For example, in the recording / reproducing of an optical disk provided with a multi-layer or a large number of recording tracks, when performing the above-described jump search between layers or tracks, a device having a structure as shown in FIG. The control was performed using. FIG. 6 shows an apparatus for performing an inter-layer jump search in recording / reproducing a multi-layer optical disk. However, FIG. 6 also shows a case in which an inter-track inter-track search is performed on an optical disk having a large number of recording tracks. The same is done.

[0006] That is, in FIG. 6, an optical pickup device 62 is provided to face the recording surface of an optical disk 61. The optical pickup device 62 is provided with an objective lens 63. A light beam 64 for reproducing recorded information from a light source device (not shown) through the objective lens 63 or a light beam 64 modulated with the recorded information is formed on the optical disk 61. The recording surface is irradiated. Thus, recording / reproduction of information on the recording surface of the optical disk 61 is performed.

The objective lens 63 is supported, for example, by a spring 65 and is moved back and forth with respect to the recording surface of the optical disk 61 by an objective lens accelerator 66. Thus, the light beam 64 irradiated on the recording surface
The position (depth) of the focal point is changed. Further, the objective lens accelerating device 66 has an objective lens accelerating signal FCS from an objective lens accelerating signal generating device 67 described later.
+ Is supplied.

Further, the photodetector 68 of the optical pickup device 62 detects the reflected light of the light beam 64 applied to the recording surface of the optical disk 61. The signal from the photodetector 68 is supplied to the RF amplifier 69, for example, a reproduction signal of information recorded on the recording surface is extracted (not shown), and the fact that the focus of the objective lens 63 is deviated from the recording surface, for example. The indicated defocus signal FE is taken out.

The defocus signal FE from the RF amplifier 69 is supplied to a servo signal generator 70. Thereby, for example, a servo signal is generated such that the defocus signal FE becomes a reference value. Then, the generated servo signal is supplied to the objective lens acceleration signal generation device 67, and for example, the objective lens acceleration signal FCS + for controlling the focus of the objective lens 63 to coincide with the layer of the desired recording surface.
Is generated.

In this apparatus, for example, when a skip search between layers is performed, for example, the microcomputer 7
The control signal FJMP for jump formed in step 1 is D / A
The signal is converted into an analog signal by the converter 72 and supplied to the objective lens acceleration signal generation device 67. RF amplifier 6
9 from the A / D converter 73
Is converted into a digital signal by the microcomputer 71
Supplied to

As a result, the control signal FJMP from the microcomputer 71 is transmitted to the objective lens acceleration signal generator 6.
7, is superimposed on the objective lens acceleration signal FCS +, the focal point of the objective lens 63 is skipped toward a desired recording surface layer, and the defocus signal FE from the RF amplifier 69 is output.
Is detected by the microcomputer 71, it is determined that the focal point of the objective lens 63 coincides with the layer of the desired recording surface, and a skip search between the layers of the desired recording surface is performed.

[0009]

However, in this device, a D / A converter 72 and an A / D converter 73 are required for output of a signal from the microcomputer 71 and input of a signal to the microcomputer 71, respectively. ing. Providing these circuits 72 and 73 is not preferable in the manufacture of the device, because it increases the size and the number of components of the device and increases the power consumption for placing these circuit components.

On the other hand, in the above-described apparatus, for example, in order to continuously and seamlessly reproduce information recorded over a plurality of layers on the recording surface of the optical disk 61, for example, a predetermined information before jumping between layers is required. During the period, the information of the last layer is read in advance and stored in a memory or the like, and the above-described skip search is terminated while the information of this memory is being read, so that the information of the next layer can be obtained. Playback is performed seamlessly from the beginning.

Therefore, in order to perform such seamless reproduction, the above-described jump search must be completed while the information in the memory is being read. For this purpose, a high-speed jump and a quick search are performed. Is required. Further, when the objective lens 63 is supported by the spring 65 as described above, since the restoring force of the spring 65 has a characteristic that increases in proportion to time, it is necessary to jump over in this plane in a short time. Is what is done.

However, when jumping is performed at high speed, it is difficult to accurately search each layer, and it is not easy to perform recording / reproducing of the layer after searching for the layer from high-speed jumping. . On the other hand, if the jump is performed at a low speed, it is difficult to perform the jump in a short time, for example, to end the above-described jump search while the information in the memory is being read.

The present invention has been made in view of the above points, and the problem to be solved is that the conventional means requires many circuit components and is preferable in the production of devices. Rather, it is difficult to realize the jump in a short time and the accurate search of each layer at the same time.

[0014]

Therefore, in the present invention, jumping and braking of the optical pickup device are controlled by using three-state outputs from a microcomputer. Good jump and braking control can be performed with a simple configuration.

Further, in the present invention, jump control and braking of the optical pickup device are controlled by a control signal having a long time width and a control having a short time width. And can perform a quick and accurate jump search.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS That is, the present invention relates to a control method for skipping an arbitrary layer or track on an optical disc provided with multiple layers or a large number of recording tracks.
A control device and a recording and / or reproducing device for an optical disk, comprising a microcomputer, which controls the jumping and braking of the optical pickup device by using three-state outputs from the microcomputer, and that the optical pickup device has The microcomputer is controlled using a determination signal as to whether or not the layer or the track has been reached.

Further, according to the present invention, in the above-described jump search control method, control apparatus and optical disk recording and / or reproducing apparatus, a signal for controlling jump and braking is a set of long time corresponding to the jump distance. Formed by signals of one and the other polarity of width and one or more sets of short time width signals of one or more sets of detectable signals for determining whether a layer or a track has been reached. It is.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing an example of a configuration of a main part of an apparatus to which a jump search control method, a control apparatus, and an optical disk recording and / or reproducing apparatus according to the present invention are applied. FIG. 1 shows an apparatus for performing a jump search between layers in recording / reproducing of a multi-layer optical disc. However, a skip search between tracks is also performed in an optical disc having a large number of recording tracks. The same is done.

In FIG. 1, an optical pickup device 2 is provided so as to face a recording surface of an optical disk 1. The optical pickup device 2 is provided with an objective lens 3 through which a light beam 4 for reproducing recorded information from a light source device (not shown) or modulated with the recorded information is applied to the optical disk 1. The recording surface is irradiated. Thus, recording / reproduction of information on the recording surface of the optical disc 1 is performed.

The objective lens 3 is supported by, for example, a spring 5 and moved back and forth with respect to the recording surface of the optical disk 1 by an objective lens accelerator 6. Thereby, the position (depth) of the focal point of the light beam 4 irradiated on the recording surface is changed. Further, the objective lens acceleration signal 6 is supplied to the objective lens acceleration device 6 from an objective lens acceleration signal generation device 7 described later.

Further, the photodetector 8 of the optical pickup device 2 detects the reflected light of the light beam 4 applied to the recording surface of the optical disk 1. This photo detector 8
Is supplied to the RF amplifier 9 and, for example, a reproduction signal of information recorded on the recording surface is extracted (not shown).
At the same time, for example, a defocus signal FE indicating that the focus of the objective lens 3 is shifted from the recording surface is extracted.

The defocus signal FE from the RF amplifier 9 is supplied to a servo signal generator 10. Thereby, for example, a servo signal is generated such that the defocus signal FE becomes a reference value. Then, the generated servo signal is supplied to the objective lens acceleration signal generation device 7 to generate an objective lens acceleration signal FCS + for controlling, for example, the focus of the objective lens 3 to coincide with a desired recording layer. You.

Further, for example, a microcomputer 11 is provided. In the microcomputer 11, a three-state signal F3ST that changes to positive and negative polarities, which will be described later, is formed. Then, the three-state signal F3ST is supplied to the objective lens acceleration signal generation device 7, and is superimposed on the above-described objective lens acceleration signal FCS +.

Further, the defocus signal FE from the RF amplifier 9 is supplied to a focus position detection device 12 provided together with the servo signal generation device 10, and the focus position detection signal FZC, which determines the defocus signal FE at an arbitrary threshold level. Is formed. Then, the focus position detection signal FZC is supplied to the microcomputer 11.

In this apparatus, for example, when performing a jump search between layers, the microcomputer 1
In step 1, for example, processing as shown in the flowcharts of FIGS. 2 and 3 is performed. FIG. 2 shows an example of processing for performing an upward search (in the direction opposite to the restoring force of the spring 5), and FIG. 3 shows an example of performing a downward search (in the same direction as the restoring force of the spring 5). 3 shows an example of the processing.

That is, when the process is started in FIG. 2, first, in step [11], the output three-state signal F is output.
3ST is set to a predetermined level of positive polarity, and an arbitrary value c = 0. Next, in step [12], a wait process is performed, and the value c is set to c = c + 1. Then, in step [13], the value c: tl1 is determined. If the value c <tl1, the process returns to step [12] and returns to step [12].
The process of [13] is repeated.

When the value c = tl1 in step [13], the output three-state signal F3ST is output in step [14].
Is set to a predetermined level of negative polarity and the value c = 0. Further, in step [15], a wait process is performed, and the value c is set to c = c + 1. And step [1
In step 6], the value c: tl2 is determined. When the value c <tl2, the process returns to step [15] and the processes of steps [15] and [16] are repeated.

Further, when the value c = tl2 in step [16], the focus servo is turned on and the flag F is set to 0 in step [17]. Step [1
8], the output 3-state signal F3ST is set to a predetermined level of positive polarity, and the value c is set to 0. Then, in step [19], the level of the focus position detection signal FZC is determined. When the level is high (H), step [20] is performed.
At the same time, the value is set to c = c + 1.

In step [21], the value c: ts1 is determined. If the value c <ts1, the process returns to step [19] and the processes in steps [19] to [21] are repeated. Further, in step [19], the focus position detection signal FZC
Is low (L), the flag F is set to 1 in step [22].

When the value c = ts1 in step [21], and when the focus position detection signal FZC is low (L) in step [19] and the flag F = 1 in step [22]. In step [23], the output three-state signal F3ST is set to a predetermined level of negative polarity, and the value c is set to c = ts1-c. Further, in step [24], a wait process is performed, and the value c = c +
It is set to 1.

In step [25], the value c: ts2 is determined. If the value c <ts2, the process returns to step [24], and the processes in steps [24] and [25] are repeated. Further, when the value c = ts2 at step [25], the flag F is determined at step [26], and when the flag F = 0, the process returns to step [18]. If the flag F = 1 in step [26], the output of the three-state signal F3ST is turned off in step [27], and the process is terminated (stopped).

Further, when the processing is started in FIG. 3, first, in step [31], the output 3-state signal F is output.
3ST is set to a predetermined level of negative polarity, and an arbitrary value c = 0. Next, in step [32], a wait process is performed, and the value c is set to c = c + 1. Then, in step [33], the value c: tl3 is determined, and if the value c <tl3, the process returns to step [32] to return to step [32].
The process of [33] is repeated.

When the value c = tl3 in step [33], the output three-state signal F3ST is output in step [34].
Is set to a predetermined level of positive polarity, and the value c = 0. Further, in step [35], a wait process is performed, and the value c is set to c = c + 1. And step [3
In step 6], the value c: tl4 is determined. If the value c <tl4, the process returns to step [35] and the processing of steps [35] and [36] is repeated.

Further, when the value c = tl4 in step [36], the focus servo is turned on and the flag F is set to 0 in step [37]. Step [3
8], the output 3-state signal F3ST is set to a predetermined level of negative polarity, and the value c is set to 0. Then, in step [39], the level of the focus position detection signal FZC is determined. When the level is low (L), step [40] is performed.
At the same time, the value is set to c = c + 1.

In step [41], the value c: ts3 is determined. If the value c <ts3, the process returns to step [39] and the processes of steps [39] to [41] are repeated. Further, in step [39], the focus position detection signal FZC
Is high (H), the flag F is set to 1 in step [42].

When the value c = ts3 at step [41], and when the focus position detection signal FZC is at the high level (H) at step [39] and the flag F = 1 at step [42]. In step [43], the output three-state signal F3ST is set to a predetermined level of positive polarity, and the value c is set to c = ts3-c. Further, in step [44], a wait process is performed, and the value c = c +
It is set to 1.

In step [45], the value c: ts4 is determined. If the value c <ts4, the process returns to step [44] and the processes in steps [44] and [45] are repeated. Further, when the value c = ts4 at step [45], the flag F is determined at step [46], and when the flag F = 0, the process returns to step [38]. If the flag F = 1 in step [46], the output of the three-state signal F3ST is turned off in step [47], and the process ends.

As a result, the three-state signal F3ST, which changes from the microcomputer 11 to positive or negative polarity, is generated in the objective lens acceleration signal generator 7 by the objective lens acceleration signal F3ST.
Superimposed on CS +, the focal point of the objective lens 3 is skipped toward a layer of a desired recording surface. And the defocus signal F
E, a focus position detection signal FZC indicating that the focal point of the objective lens 3 coincides with the layer of the desired recording surface.
Is supplied to the microcomputer 11, the jump is stopped, and a jump search of a desired layer is performed.

In this apparatus, for example, in the process of FIG. 2 for performing an upward jump search, the microcomputer 11 outputs, for example, a three-state signal F3ST as shown in FIG. 4A. Here, the length of the period of the first positive pulse is the value tl1 shown in the above-described flowchart, and the length of the period of the next negative pulse is the value tl2. Further, the length of the period of the subsequent positive polarity pulse is the value t.
s1 and the length of the period of the last negative pulse is the value ts2
It is.

The three-state signal F3ST is supplied to the objective lens acceleration signal generation device 7 so that
The objective lens acceleration signal FCS + as shown in FIG. 4B, for example, is supplied from the objective lens acceleration signal generation device 7 to the objective lens acceleration device 6 of the optical pickup device 2.

As a result, the objective lens 3 of the optical pickup device 2 performs a large upward movement (jump) with the first positive pulse, and the movement (jump) is braked with the next negative pulse. Further, a small upward movement is performed by a subsequent positive pulse, and this movement is braked by the last negative pulse.

The movement (jump) of these objective lenses 3
And braking, the RF amplifier 9 outputs, for example, D in FIG.
Is obtained, and the defocus signal FE is determined at an arbitrary threshold level to form a focus position detection signal FZC as shown in FIG. 4C, for example.

Similarly, in the processing of FIG. 3 for performing a downward jump search, for example, the microcomputer 11 outputs a three-state signal F3ST as shown in FIG. 5A, for example. Here, the length of the period of the first negative pulse is the value tl3 shown in the above-described flowchart, and the length of the period of the next positive pulse is the value tl4. Further, the length of the period of the subsequent negative pulse is ts3, and the length of the last positive pulse is ts4.

The three-state signal F3ST is supplied to the objective lens acceleration signal generation device 7 so that
The objective lens acceleration signal FCS + as shown in FIG. 5B, for example, is supplied from the objective lens acceleration signal generation device 7 to the objective lens acceleration device 6 of the optical pickup device 2.

As a result, the objective lens 3 of the optical pickup device 2 performs a large downward movement (jump) with the first negative pulse, and the movement (jump) is braked with the next positive pulse. Further, a small downward movement is performed by a subsequent negative pulse, and this movement is braked by the last positive pulse.

The movement (jump) of these objective lenses 3
And braking, the RF amplifier 9 outputs, for example, D in FIG.
Is obtained, and the defocus signal FE is determined at an arbitrary threshold level to form a focus position detection signal FZC as shown in FIG. 5C, for example.

Thus, in this apparatus, for example, the focal point is moved (jumped) from a state in which an arbitrary layer is focused to a point slightly before the desired layer above or below by the first large pulse, and the small pulse in the latter half is moved. Is focused on the desired layer, and a skip search between layers is performed, for example, in recording / reproducing of a multilayer optical disc.

In this case, the control using the three-state signal F3ST of the microcomputer 11 eliminates the need for the conventional D / A conversion converter, and the conventional control by discriminating the focus position detection signal FZC. An A / D converter is not required, the size and the number of parts of the device are reduced, and the power consumption is reduced, so that a favorable device can be provided.

According to the above-described apparatus, complicated speed control is not performed by determining only the focus position detection signal FZC, and the control itself can be simplified.

Further, according to the above-mentioned device, the movement (jump) is performed at a high speed by the first large pulse, and the focus is adjusted at a low speed by the second small pulse. In addition to skipping over time, accurate search of each layer and recording / reproduction after searching the layer can be performed quickly and well.

In the above-described apparatus, if the values tl1 and tl2, the values ts1 and ts2, the values tl3 and tl4, and the values ts3 and ts4 shown in the above-described flowchart are theoretically equal, the respective movements are performed. However, if there is an effect of the restoring force of the spring 5 or the like, a different value can be set in consideration of the influence. The respective values also differ depending on the difference between the upward control and the downward control, and these values are determined by experiments and the like.

Further, in the above-described examples of FIGS. 4 and 5, the focus position detection signal FZC is inverted by one small movement, but each of these small movements is repeated a plurality of times until the focus position detection signal FZC is inverted. Is performed. As a result, it is possible to absorb the variation with time or disturbance. Further, the values ts1 and ts2 and the values ts3 and ts4 may be changed according to the number of these small movements.

Further, in the above-mentioned apparatus, as shown in the above-mentioned flowchart, by turning on the focus servo after the movement (jump) with a large pulse, it is possible to eliminate unnecessary movement during operation.

Therefore, in this apparatus, by controlling the jump and braking of the optical pickup device by using the three-state output from the microcomputer, good jump and braking control can be performed with a simple configuration.

In this apparatus, the jump and braking of the optical pickup device are controlled by the control signal having a long time width and the control of the short time width, so that a quick and accurate jump search can be performed with a simple configuration. I can do it.

As a result, the conventional means requires a large number of circuit components, which is not preferable in terms of the manufacture of the device. In addition, jumping in a short time and accurate search of each layer can be realized simultaneously. According to the present invention, these difficulties can be easily solved.

As described above, according to the above-described jump search control method, control apparatus, and optical disk recording and / or playback apparatus, an arbitrary layer or track can be jump-searched on an optical disk having a plurality of recording tracks. At this time, a microcomputer is provided, which controls the jumping and braking of the optical pickup device using three-state outputs from the microcomputer, and determines whether the optical pickup device has reached a desired layer or track. By controlling a microcomputer using a signal, a quick and accurate jump search can be performed with a simple configuration.

Further, in the above-described jump search control method, control apparatus, and optical disk recording and / or playback apparatus, a signal for controlling jump and braking includes one of a set of long time widths corresponding to the jump distance. By forming a signal of the other polarity and one or more sets of one or more short time width signals capable of detecting a determination signal indicating whether or not a layer or a track has been reached, a signal having a simple configuration is provided. A quick and accurate jump search can be performed.

The present invention is not limited to the case of performing the inter-layer jump search in the recording / reproducing of the above-mentioned multilayer optical disc, but also the case of performing the inter-track jump search in an optical disc having a large number of recording tracks. Is similarly implemented. In addition, the present invention can be implemented by only a part of the procedures without providing all the procedures described above.

Further, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0061]

As described above, according to the present invention, the jumping and braking of the optical pickup device are controlled by using the three-state output from the microcomputer, so that the jumping and braking can be favorably controlled with a simple configuration. Is what you can do.

Further, according to the present invention, the jump and braking of the optical pickup device are controlled by the control signal having the long time width and the control of the short time width, so that a quick and accurate jump search can be performed with a simple configuration. What you can do.

As a result, the conventional means requires a large number of circuit components, which is not preferable in terms of the manufacture of the apparatus. In addition, jumping in a short time and accurate search of each layer can be realized simultaneously. According to the present invention, these difficulties can be easily solved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an example of a main part of an apparatus to which a jump search control method, a control apparatus, and an optical disk recording and / or reproducing apparatus according to the present invention are applied.

FIG. 2 is a flowchart for explaining the operation.

FIG. 3 is a flowchart for explaining the operation.

FIG. 4 is a waveform chart for the explanation.

FIG. 5 is a waveform chart for the explanation.

FIG. 6 is a diagram for explaining a conventional jump search control method, control device, and optical disk recording and / or reproducing device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical disk, 2 ... Optical pickup device, 3 ... Objective lens, 4 ... Light beam, 5 ... Spring, 6 ... Objective lens acceleration device, 7 ... Objective lens acceleration signal generation device, 8 ... Photodetector, 9 ... RF amplifier, 10 … Servo signal generator,
11 microcomputer, 12 focus position detecting device

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D090 AA01 CC01 CC04 CC18 DD03 DD05 FF02 FF12 HH01 JJ03 5D117 AA02 CC01 CC04 EE10 EE13 FF13 FF25

Claims (18)

[Claims] 1. A control method for skipping and searching for an arbitrary layer or track on an optical disc having a multi-layer or a large number of recording tracks, comprising: a microcomputer; Controlling the jump and braking of the optical pickup device using the output of the optical pickup device, and controlling the microcomputer using a determination signal as to whether the optical pickup device has reached the desired layer or track. A control method for skip search. 2. The jump search control method according to claim 1, wherein the signal for controlling the jump and braking is formed by combining one of the three-state outputs and a signal having the other polarity. How to control jumping. 3. The jump search control method according to claim 1, wherein the signal for controlling the jump and braking is formed in accordance with the position of the optical pickup device. . 4. The jump search control method according to claim 1, wherein the signal for controlling the jump and braking is formed by a plurality of signals. 5. The jump search control method according to claim 1, wherein the signal for controlling the jump and the braking includes a signal having one and the other polarity of a set of long time widths corresponding to the jump distance. And a signal having one or more short time widths of at least one set of detectable detection signals for determining whether the layer or the track has been reached. 6. The jump search control method according to claim 5, wherein the servo means for determining whether or not the layer or the track has been reached is controlled by the long time width signal. Is performed, before the control of the jump and braking by the signal of the short time width is started, and whether or not the layer or the track is reached at the time of control by the signal of the short time width. A skip jump search control method characterized in that a discrimination is made. 7. A control device for performing a jump search of an arbitrary layer or track on an optical disc provided with a multi-layer or a large number of recording tracks, comprising a microcomputer, which controls jumping and braking of an optical pickup device. Control is performed using three-state output from the microcomputer, and a determination signal as to whether or not the optical pickup device has reached the desired layer or track is supplied to the microcomputer to control the optical pickup device. A jump search control device, which controls jump and braking. 8. The jump search control device according to claim 7, wherein the signal for controlling the jump and braking is formed by combining signals of one polarity and the other polarity of the outputs of the three states. Control device for jump search. 9. The jump search control device according to claim 7, wherein the signal for controlling the jump and braking is formed according to the position of the optical pickup device. . 10. The jumping search control device according to claim 7, wherein the jumping and braking control signals are formed by a plurality of signals. 11. The jump search control device according to claim 7, wherein the signal for controlling the jump and the braking includes a signal of one and the other polarity of a set of long time widths corresponding to the jump distance. , A control signal for jump search, which is formed by one or more sets of short time width signals of one and the other polarities which can detect a determination signal as to whether or not the layer or the track has been reached. 12. The jump search control device according to claim 11, wherein the servo means for determining whether the layer or the track has been reached is controlled by the long time width signal. Is performed, before the control of the jump and braking by the signal of the short time width is started, and whether or not the layer or the track is reached at the time of control by the signal of the short time width. A control device for jump search, wherein the control device performs a determination of a jump. 13. A recording and / or reproducing apparatus for an optical disk provided with a multi-layer or a large number of recording tracks, comprising a microcomputer, wherein jumping and braking of the optical pickup device are controlled by three-states from the microcomputer. In addition to using the output, a determination signal as to whether or not the optical pickup device has reached the desired layer or track is supplied to the microcomputer to control jumping and braking of the optical pickup device. Recording and / or reproducing apparatus for an optical disk. 14. The recording and / or reproducing apparatus for an optical disk according to claim 13, wherein the signal for controlling the jump and braking is formed by combining signals of one polarity and the other polarity of the outputs of the three states. An optical disc recording and / or reproducing apparatus characterized by the above-mentioned. 15. The optical disc recording and / or reproducing apparatus according to claim 13, wherein the signal for controlling the jump and braking is formed in accordance with the position of the optical pickup device. Recording and / or playback device. 16. The optical disk recording and / or reproducing apparatus according to claim 13, wherein the signal for controlling the jump and braking is formed by a plurality of signals. apparatus. 17. The recording and / or reproducing apparatus for an optical disk according to claim 13, wherein the signal for controlling jumping and braking is one of a pair of long time widths corresponding to the jumping distance and the other polarity. And a signal having one or more short time widths of one or more sets of short time widths capable of detecting a signal for determining whether or not the layer or the track has been reached. And / or a playback device. 18. The optical disk recording and / or reproducing apparatus according to claim 17, wherein a servo means for judging whether or not the layer or the track has been reached is provided by the signal having a long time width. After the control of the braking is performed, the control is started before the control of the jump and the braking after the signal of the short time width is started, and the layer or the track is reached at the time of the control by the signal of the short time width. A recording and / or reproducing apparatus for an optical disc, characterized in that it is determined whether or not the disc is recorded.