JP2008152822A - Information recording / reproducing apparatus and trial writing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information recording / reproducing apparatus capable of surely performing trial writing on a hybrid disk having a multi-layer structure and a trial writing method therefor.
In an information recording / reproducing apparatus capable of recording / reproducing information by irradiating a multi-layered hybrid disk with laser light of a predetermined wavelength, the multi-layered hybrid disk is placed in the apparatus. At the start of the first recording after mounting, the test writing is performed on all recording / playback layers in the test writing area on the inner circumference of the disc to determine the optimum power of the laser beam, and the test writing on the outer circumference is performed. Even in the area, trial writing is performed on all the recording / reproducing layers to determine the optimum power of the laser beam, and the optimum power of the determined laser beam is recorded, so that the laser beam in the subsequent recording operation is recorded. It is used to control the power.
[Selection] Figure 5

Description

  The present invention relates to an information recording / reproducing apparatus for recording / reproducing information on / from an optical disc, and more particularly to a so-called hybrid disc in which a plurality of types of information recording / reproducing layers are laminated on the same surface. The present invention relates to an information recording / reproducing apparatus capable of recording / reproducing optimum information with an appropriate recording power for each layer, and a test writing method therefor.

  In a so-called information recording / reproducing apparatus, which is an optical disk apparatus that uses a disk-shaped optical recording medium (hereinafter referred to as “optical disk”) to optically reproduce / record a signal recorded on the information recording surface, The optical disk is mounted on the tray of the optical disk apparatus and taken into (mounted on) the optical disk apparatus, and recording control such as test writing is performed at the start of the recording operation. This is because control for setting various conditions in the recording operation is necessary in order to ensure high recording quality capable of guaranteeing compatibility in reproduction.

  In recent years, with the advent of blue laser diodes, optical discs (for example, BD or HD-DVD) using blue lasers have appeared as optical information recording media having a higher density recording capacity. Thus, an optical information recording medium called a hybrid disc that combines a conventional optical disc using a red laser beam, such as a DVD or a CD, and an optical disc using the blue laser has been devised. In such an optical disc, a BD or HD-DVD layer is formed on the same information recording surface as well as a DVD or / and CD layer (two-layer or three-layer structure).

  By the way, when recording / reproducing information to / from the above-described hybrid disk having a multi-layer structure, information recording / reproduction is necessary in a state where the disk is inserted into a drive which is an optical disk recording / reproducing apparatus, as in a normal disk. It is possible to switch the focus of the optical pickup with respect to various layers. However, in that case, an independent test writing is required. This test writing is performed after recording in the “Calibration area” on the optical disc called “Power Calibration”, and is reproduced based on the characteristics of the reproduced signal. This is a process of learning recording power (OPC process).

  Conventionally, for example, according to Patent Document 1 below, for the purpose of improving usability in trial writing on a multi-layer disc, “trial writing” is performed on two layers for the first time, and the subsequent 2 It is disclosed that the trial writing after the first time is performed only in one layer, and the optimum recording power of the other layer is obtained by using the ratio obtained in the first trial writing.

Further, for example, according to Patent Document 2 below, unlike the optical disc having the multi-layer structure, trial writing is performed on the inner and outer circumferences of the optical disc having a single (1) layer structure, and thereafter at each radial position. A method for calculating the optimum recording power and an optical disc apparatus are disclosed.
JP 2005-259257 A JP 2004-86999 A

  As described above, when recording / reproducing information on a hybrid disc having a multi-layer structure, the recording power suitable for each layer is obtained by performing independent test writing on each layer with the optical disc inserted into the drive. OPC processing for learning the above is executed. In such a case, in the above hybrid disc in which discs of different standards overlap, each layer exists on the same surface, however, the laser beam used for information recording / reproduction and its recording capacity are completely different, so switching Sometimes, completely different trial writing learning is required, that is, the drive side needs an operation for handling a completely different disk. At this time, the OPC processing time for each layer or a seek error at the time of executing the OPC processing takes time until the start of the recording operation at the time of layer switching, which is uncomfortable for the user. It was pointed out.

  Therefore, in the present invention, for such a multi-layer hybrid disc, the OPC processing time for each layer is shortened, the seek error (SEEK Error) is reduced when the OPC processing is executed, and the recording is started when the layers are switched. The purpose is to provide an information recording / reproducing apparatus capable of reliably performing trial writing without causing discomfort to the user and a trial writing method therefor. And

  In order to achieve the above object, according to the present invention, first, a spindle motor that rotates a disk-shaped disk at a predetermined rotational speed, and a radius of the hybrid disk having the multi-layer structure that is rotated by the spindle motor. An optical pickup which is provided so as to be movable in the direction, records information by irradiating a laser beam of a predetermined wavelength to the information recording layer of the disc, and receives the reflected light to reproduce the recorded information; An actuator for controlling the position of the optical pickup in the radial direction of the disk and a controller for controlling at least the spindle motor and the actuator are provided, and the optical pickup irradiates at least two laser beams having different wavelengths. For a hybrid disk with a multi-layer structure with a laser generator. An information recording / reproducing apparatus capable of recording / reproducing information by irradiating each information recording layer having a plurality of structures with a laser beam having a predetermined wavelength, wherein the control device is a hybrid having the multi-layer structure. At the start of the first recording after the disk is installed in the apparatus, the actuator is moved by the actuator, and all the recording / recording data constituting the disk are recorded in one of the test writing areas on the inner and outer circumferences of the disk. Test writing is performed on the playback layer to determine the optimum power of the laser beam, and in the other test writing area of the disc, test writing is performed on all recording / playback layers constituting the disc. And determine the optimum power of the laser beam, record the determined optimum power of the laser beam, and record these recorded powers in the subsequent recording operation. Information recording / reproducing apparatus for executing the recording is provided using the optimum power of the laser light.

  In the present invention, in the information recording / reproducing apparatus described above, the control device includes a memory for recording the optimum power of the laser beam determined for all the recording / reproducing layers. Preferably, the optical pickup includes at least a laser generating element that generates laser light having a wavelength of 405 nm, a laser generating element that generates laser light having a wavelength of 650 nm, and a laser generating element that generates laser light having a wavelength of 780 nm. It is preferable to include either one or both of the elements. Furthermore, it is preferable that the optical pickup includes means for switching irradiation of laser light from the plurality of laser generating elements.

  According to the present invention, there is also provided a trial writing method for performing trial writing on a hybrid disk having a multi-layer structure in order to achieve the above object. At the start of the first recording after the mounting, in one of the test writing areas on the inner and outer circumferences of the disc, trial writing is executed on all the recording / reproducing layers constituting the disc to optimize the laser beam. The power is determined, and in the other trial writing area of the disc, trial writing is performed on all the recording / reproducing layers constituting the disc to determine the optimum power of the laser beam, and the above determination is made. Write method for information recording / reproducing apparatus for recording the optimum power of the laser beam and using it to control the power of the laser beam in the subsequent recording operation There is provided.

  In the present invention, in the test writing method described above, if an error occurs during the test writing, the test writing is executed by reducing the rotational drive speed of the hybrid disk having the multi-layer structure. Preferably, the hybrid disk having a multi-layer structure for performing the test writing method described above has at least a BD or HD-DVD blue laser recording layer and a DVD layer and CD layer red laser recording. It is preferable to provide one or both of the layers.

  As described above, according to the present invention, for a hybrid disk having a multi-layer structure, the OPC processing time for each layer is shortened, the seek error (SEEK Error) at the time of executing the OPC processing is reduced, and further, layer switching is performed. Providing an information recording / reproducing device that can shorten the time until the start of recording at the time, and can reliably perform trial writing without causing discomfort to the user, and a trial writing method therefor It also has an excellent practical effect of making it possible.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  First, FIG. 1 attached herewith is a block diagram showing an example of the configuration of an optical disk apparatus according to an embodiment of the present invention. In this figure, reference numeral 1 indicates the entire optical disk apparatus according to the embodiment of the present invention. Yes. Reference numeral 2 in the figure, as will be described later, is a so-called hybrid having a plurality of recording layers of different standards, for example, a blue laser recording layer and a red laser recording layer on the same recording surface side. A type optical disk is shown. The hybrid type optical disc 2 is mounted on a turntable 33 attached to the tip of a rotation output shaft of a spindle motor 3 provided in the optical disc apparatus 1 and is driven to rotate at a predetermined rotational speed.

  An optical pickup 4 is further provided in the optical disc apparatus 1 so as to be movable in the radial direction of the optical disc 2. The optical pickup has an objective lens 5 for recording or reproduction. A laser diode 6 for generating a laser beam having a predetermined intensity required, a laser drive circuit 7 (LDD) for driving the laser diode, and reflected light from the recording surface of the optical disc 2 are received through the objective lens 5. The light receiving unit 8 converts the electric signal into an electric signal and outputs it, and the actuator 9 moves and displaces the objective lens 5 with respect to the optical disk surface and changes the posture of the objective lens 5. Further, an actuator drive circuit 10 is provided to drive the actuator 9 constituting the optical pickup 4.

  Reference numeral 11 in the figure denotes a movement / guide mechanism section for moving the optical pickup 4 in the substantially radial direction of the optical disk 2 including a movement mechanism composed of a linear guide member and a lead screw member (not shown). The slide motor 12 which rotationally drives the lead screw member which comprises the said moving mechanism is shown in the inside.

  Reference numeral 13 in the drawing indicates a loading mechanism unit for loading and unloading (loading or unloading) the hybrid type optical disc 2 in the apparatus main body. Although not shown in the drawing, the hybrid type optical disc 2 is placed therein. And a loading motor 14 for moving and driving the tray. The spindle motor 3, the slide motor 12, and the loading motor 14 are rotated by being supplied with a driving current / voltage via a motor driving circuit 15.

  Further, reference numeral 16 in the figure denotes a recording signal generation unit for generating a recording signal to be recorded on the recording layer of the hybrid optical disc 2, and the generated recording signal is sent to the laser drive circuit 7 ( LDD). Reference numeral 17 denotes a reproduction / error signal processing unit for detecting and processing an RF signal, tracking error signal, and focus error signal from the reproduction signal from the light receiving unit 8 of the optical pickup 4. Reference numeral 18 denotes a focus / tracking control unit for generating a focus control signal and a tracking control signal and outputting them to the actuator 9.

  In addition, reference numeral 20 in the figure generates a servo signal to be supplied to the motor drive circuit 15, generates a signal for controlling the recording signal generation unit 16, and generates a signal from the reproduction / error signal processing unit 17. At the same time, the reproduction signal (RF signal) is demodulated, and at the same time, a control signal is generated based on the detected tracking error signal and focus error signal and supplied to the focus / tracking control unit 18. DSP (Digital Signal Processor) as a control means for controlling the level of the signal. The DSP 20 is a microcomputer (hereinafter simply “microcomputer”) 30 as control means for executing control of the entire apparatus, and the microcomputer stores storage means for storing information processed therein. The memory 31 is provided. The DSP 20 is connected to the host computer 50 that issues a write request by outputting a write request signal to the optical disc apparatus via the interface 40, and takes in the write request signal.

  In the above-described configuration, the laser diode 6 constituting the optical pickup 4 corresponds to the blue laser recording layer and the red laser recording layer constituting the recording surface of the hybrid optical disc 2, respectively. A blue laser diode that generates and emits blue laser light and a red laser diode that generates and emits red laser light are provided.

  FIG. 2 attached herewith is a diagram showing a detailed structure inside the optical pickup 4 in the optical disk apparatus having the overall configuration described above. In this figure, the pickup records / reproduces information on the optical disk 2. Along with an optical system including the objective lens 5 and the beam expander 51 arranged facing the layer (the lower surface side in the figure), laser generating elements 52 and 53 each of which generates laser light having different wavelengths, for example, composed of a laser diode. , 54. Furthermore, for example, a light receiving element 55 (corresponding to the light receiving unit 8 in FIG. 1) configured by a photodiode or the like is provided. The objective lens 5 is a three-wavelength compatible objective lens. Along with a beam expander 51 composed of a plurality of lenses, for example, a direction perpendicular to the surface of the optical disc 2 by an actuator 9 using electromagnetic force (see FIG. It is possible to move to (see arrow).

  The laser generating elements 52, 53, and 54 respond to commands from the microcomputer 30, and the driving of light emission is controlled by the respective driving circuits 521, 531, and 541. For example, the element 52 is BD or HD-DVD. The laser beam having a wavelength of 405 nm is generated, the element 53 generates a laser beam having a wavelength of 650 nm for DVD, and the element 54 generates a laser beam having a wavelength of 780 nm for CD. Reference numeral 56 in the figure reflects the laser light generated from each of the laser generating elements 52 to 54, and passes through the objective lens 5 and the beam expander 51 to record / record information on the optical disc 2 (the lower surface in the figure). And a so-called half mirror (or a deflecting beam splitter) for guiding the reflected light from the surface of the optical disc 2 and guiding it to the light receiving element 55. The reflected light detected by the light receiving element 55 is detected by a detection circuit 57 (corresponding to the light receiving unit 8 in FIG. 1) and converted into an electric signal.

  Furthermore, the hybrid type optical disc 2 in which information is written and read (recorded / reproduced) by the optical disc apparatus according to the present invention has different types of optical discs such as a BD or HD-DVD layer, a DVD layer, and a CD layer. Different recording / reproducing layers (two or three layers in this example) are stacked. Each recording / reproducing layer has a different distance d from the disk-shaped disk surface (lower surface in the figure) irradiated with laser light to the information recording surface on which data is recorded. That is, in BD, d = about 0.1 mm (see FIG. 3A), in HD-DVD layer or DVD layer, d = about 0.6 mm (see FIG. 3B), and in CD layer, d = about 1.2 mm (see FIG. 3C). These recording / reproducing layers are, for example, a BD or HD-DVD layer and a DVD layer (two layers), a BD or HD-DVD layer and a CD layer (two layers), or Like the BD or HD-DVD layer, the DVD layer, and the CD layer (three layers), they are formed so as to overlap the recording / reproducing surface of the hybrid optical disc 2 in the vertical direction. In the following description, the BD or HD-DVD layer is also referred to as a blue laser recording layer, and the DVD or CD layer is also referred to as a red laser recording layer.

  The laser diode (LD) 6 shown in FIG. 1 includes a blue laser recording layer (specifically, an HD-DVD or BD layer) that constitutes the recording surface of the hybrid optical disc 2 described above. And a blue laser diode (see reference numeral 52 in FIG. 2) for generating and emitting a blue laser beam corresponding to a red laser recording layer (specifically, a DVD or CD layer) and a red laser diode It consists of a red laser diode (see reference numeral 53 or 54 in FIG. 2) that generates and emits laser light.

  That is, the blue laser beam is emitted from the blue laser diode 52 in the laser diode 6 to the blue laser recording layer (BD or HD-DVD layer) of the hybrid optical disc 2, and the objective lens 5. The information is recorded or reproduced by irradiating the blue laser recording layer (BD or HD-DVD layer) through (see FIG. 4A). On the other hand, for the red laser recording layer (DVD layer or / and CD layer), red laser light is emitted from the red laser diode 53 or 54 in the laser diode 6 and information is recorded through the objective lens 5. / Reproduction is performed (see FIG. 4B or FIG. 4C). The switching between the blue laser diode and the red laser diode corresponds to the switching operation of the recording / reproducing layer. Specifically, the microcomputer 30 as the control means controls the DSP 20. The switching is performed by switching the driving circuits 521, 531, 541 (see FIG. 2) of the respective laser diodes in the laser driving circuit 7.

  The DSP 20 receives a command from the microcomputer 30 and controls the motor drive circuit 15, the recording signal generation unit 16, the laser drive circuit 7, the focus / tracking control unit 18, etc. The laser diode 6, the intensity of the laser light, the position of the objective lens 5 and the like are set in a state corresponding to the recording layer for the blue laser or the recording layer for the red laser. Further, the microcomputer 30 and the DSP 20 as control means record or state such as scratches and dirt on the recording surface (one or both of the blue laser recording layer and the red laser recording layer) of the hybrid optical disc 2. If there is a factor that deteriorates the value above the reference value, the motor drive circuit 15 is controlled to reduce the rotational speed (double speed) of the hybrid optical disc 2 in order to ensure recording or reproduction performance ( The rotation speed of the spindle motor 3 is decreased so that the rotation speed is reduced (= down the double speed value).

  In addition, in addition to the above-described control, the microcomputer 30 learns setup information at the time of setup in the recording layer immediately before switching of the recording layer of the hybrid optical disc 2, that is, the determination result of the type of the hybrid optical disc 2. The measurement result of the eccentricity, the measurement result of the eccentric center of gravity, the correction result of the same surface shake, and the adjustment result of the apparatus part other than the hybrid optical disc 2, for example, the recording signal output from the recording signal generation unit 16 Part or all of them are learned including the level adjustment result and the level adjustment result of the output signal output from the reproduction / error signal processing unit 17. Further, the microcomputer 30 learns error information at the time of recording or reproduction in the recording layer before switching, that is, whether there is a decrease in the double speed value at the time of recording or reproduction, a factor of the double speed value at the time of recording or reproduction, A part or all of the address is learned including the address where the double speed value is down during recording or reproduction. Further, the microcomputer 30 stores the learning results in a memory 31 as a storage unit. Thereafter, when the recording layer of the hybrid type optical disc 2 is switched, the microcomputer 30 uses the information of the learning result in the recording layer before the switching also in the recording layer after the switching, and the setup operation and the recording or reproducing operation. To do. When information obtained by reducing the rotation speed value of the hybrid optical disc 2 is stored in the memory 31 as the learning result information, the microcomputer 30 controls the motor drive circuit 15 to rotate the rotation speed of the spindle motor 3. Accordingly, the rotational speed of the hybrid optical disc 2 is reduced.

  Subsequently, the operation of the optical disc apparatus according to the embodiment of the present invention, the configuration of which has been described in detail above, in particular, the details of the trial writing operation on the hybrid type optical disc (Hybrid Disc) 2 in which recording / reproducing layers of different standards are overlapped. This will be described below with reference to the flowchart of FIG.

  First, the disc is taken into the optical disc apparatus, and at the start of recording, trial writing is performed on the plurality of recording / reproducing layers, for example, a BD or HD-DVD blue laser recording layer, and then another standard layer is recorded. For example, when the DVD layer or the CD layer is switched to the red laser recording layer, it is necessary to perform test writing on the layer again. This is because each recording / reproducing layer of the hybrid type optical disc (Hybrid Disc) 2 has a different standard, and therefore includes the nature of each recording / reproducing layer and the type of laser light used, This is because they are all different. Then, when a layer is switched during recording on the hybrid optical disc, and then recording is immediately started on the switched layer, trial writing on the layer is required. However, in order to perform test writing, it is necessary to move the position of the optical pickup 4 from the position on the layer where recording has been performed to the inner or outer periphery of the switched layer. For this reason, it takes time until the actual recording operation starts, and the possibility of a seek error (SEEK Error) also increases. Furthermore, every time when the optical pickup 4 is moved to the inner or outer periphery of the disc 2 on the hybrid type optical disc (Hybrid Disc) and the test writing is performed, all the data for that purpose are written. If the test writing time is combined, it takes a considerable amount of time, which may be uncomfortable for the user.

  By the way, the above-described hybrid type optical disc is formed by overlapping a plurality of recording / reproducing layers having different standards, so that the recording / reproducing layer exists on the same surface of the disc, and therefore, jumps between different layers. By performing the (Jump) operation, it is possible to immediately move to a layer of a different standard and execute recording / reproduction immediately. That is, if the result of the trial writing when the trial writing is performed on one layer when the disc is taken into the optical disc apparatus is saved, then after switching to the other layer once, the original writing is performed again. When you return to the layer, you can start recording immediately.

  Therefore, in the present invention, when the hybrid type optical disc is loaded (mounted) into the optical disc apparatus, trial writing is performed on all the different layers at the start of the first recording, and the result is obtained, for example, by the microcomputer 30. It is recorded in the memory 31. According to this, even if the recording layer is changed after that, recording / reproduction can be performed immediately. In addition, the optical pickup 4 seeks (SEEK) for the test writing procedure. For the distance, it is possible to shorten the time required for all trial writings in each layer by performing the procedure that minimizes the distance. As a result, the possibility of the above-mentioned seek error (SEEK Error) This has been achieved on the basis of the knowledge of the inventors that it can be reduced as much as possible.

  That is, referring to the flowchart of FIG. 5, when trial writing is started, as the procedure, at the time of the first trial writing, the trial writing is performed by moving to the inner trial writing area. Test writing is also performed on the inner circumference of all the different layers.

  More specifically, the optical pickup 4 is moved to the test writing area on the inner periphery of the optical disc, and test writing on the inner periphery is started (step S51). That is, in this trial writing, after writing (recording) with a plurality of laser beams having different intensities, the recorded information is read (reproduced), and the resulting beta (β) value is used. The optimum power of the laser beam is determined so as to match the value stored in the apparatus in advance for each disk.

  Thereafter, it is determined whether or not the loaded optical disk is a hybrid optical disk (Hybrid Disc) (step S52). As a result, when the optical disc is not a hybrid type optical disc (“No”), the process proceeds to the following step S57. When the optical disc is a hybrid type optical disc (“Yes”), the test write area in the inner periphery is further moved. It is determined whether or not an error (Error) has occurred in the trial writing (step S53). If an error (Error) has occurred as a result ("Yes"), the speed of the trial writing is reduced by one step. (Down) (step S54), next, the test writing in the other layer is started in the test writing area on the inner periphery in the same manner as described above (step S55). On the other hand, in step S53, if no error has occurred in the trial writing in the inner test writing area ("No"), the inner writing speed is not increased at the same speed without reducing the speed of the test writing. It starts in the test writing area (step S55). Thereafter, it is confirmed that the trial writing in the inner circumference trial writing area in all layers is completed (step S56), and the process proceeds to the trial writing operation on the outer circumference. That is, for example, in a hybrid type optical disc composed of three layers of BD or HD-DVD, DVD layer, and CD layer, the determination in step S56 is “No”, and as a result, the process returns to step S53 again. Furthermore, trial writing is performed on the inner periphery up to the third layer.

  After the above-described test writing on the inner circumference is completed (“Yes” in determination step S56), the optical pickup 4 is moved to the test writing area on the outer circumference of the optical disc, and trial writing on the outer circumference is started (step S57). Thereafter, it is determined whether or not the loaded optical disc is a hybrid type optical disc (Hybrid Disc) (step S58). As a result, if the optical disc is not a hybrid type optical disc ("No"), a series of processing is terminated. On the other hand, if the optical disc is a hybrid type optical disc (“Yes”), it is determined whether or not an error has occurred in the test writing on the inner circumference (step S59). If an error has occurred (“ “Yes”), the double speed of the test writing is decreased by one step (step S60), which is the same as the above steps S52 to S56. It starts in the trial writing area (step S61). The same applies to the case where there is no error (“No”) in step S59. Thereafter, it is confirmed that the trial writing in the outer peripheral trial writing area in all the layers is completed (step S62). As a result, in the case of “Yes”, the series of processing is terminated.

  That is, normally, it is seek (SEEK) movement that takes the most time in the trial writing in the hybrid type optical disc. Therefore, as described above, the trial writing of all the layers is performed in advance on the inner circumference, and further, Thereafter, if trial writing is performed on all the layers on the outer periphery, the time required for the seek (SEEK) movement in the subsequent recording operation can be shortened. In addition, as the number of seek (SEEK) movements and the distance increases, the risk of a seek error will inevitably increase. However, test writing should be performed according to the above procedure. As a result, the number of seek (SEEK) movements and the possibility of occurrence of a seek error (SEEK Error) associated therewith can be reduced at the same time.

  In addition, as described above, when trial writing is performed on the inner and outer circumferences of a hybrid type optical disc, an error (Error) occurs due to a seek error (SEEK Error) or the like in one layer. When it becomes necessary to perform trial writing at a lower speed, an error may occur in other layers as well. Therefore, in the test writing method described above, in such a case, the test writing is performed with the speed reduced (Down) in advance. That is, by lowering the double speed (Down) in advance, it is possible to reduce the possibility that an error (Error) occurs and test writing is started again (Retry). That is, once trial writing is performed at the double speed, then the trial writing is performed by reducing the double speed (Down) from the trial writing, thereby reducing the increased trial writing time. In the above embodiment, when an error occurs in the test writing performed on either the inner or outer periphery of the disc, the double speed is similarly applied to the test writing of the other layers. The test writing is done with a one step lower. Alternatively, when an error occurs in the test writing on the inner circumference or the outer circumference of the disc, it is possible to perform the trial writing by reducing the double speed in the trial writing of the other layers by one step. In the above example, the trial writing is performed from the inner periphery side of the hybrid optical disc. However, instead of this, the test writing can be performed from the outer periphery side.

1 is a block diagram for illustrating a schematic configuration of an optical disc apparatus according to an embodiment of the present invention. It is a block diagram which shows the internal detailed structure of the optical pick-up of the said optical disk apparatus. It is a figure for demonstrating the composition of the information recording / reproducing layer of the hybrid type optical disk which can be recorded / reproduced with the said optical disk apparatus. It is a figure for demonstrating recording operation | movement to the information recording / reproducing layer of the said hybrid type optical disk. It is a flowchart for demonstrating the detail of the test writing method in the said optical disk apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Optical disk apparatus, 2 ... Hybrid type optical disk, 3 ... Spindle motor, 4 ... Optical pick-up, 5 ... Objective lens, 6, 52, 53, 54 ... Laser diode, 7, 521, 531, 541 ... Laser drive circuit, 8 , 55 ... light receiving part, 57 ... detection circuit, 9 ... actuator, 10 ... actuator driving circuit, 11 ... movement / guide mechanism part, 13 ... loading mechanism part, 15 ... motor drive circuit, 16 ... recording signal generation part, 17 ... Reproduction / error signal processing unit, 18 ... focus / tracking control unit, 20 ... DSP, 30 ... microcomputer, 31 ... memory, 40 ... interface, 50 ... host computer

Claims (7)

A spindle motor that drives a disk-shaped disk to rotate at a predetermined rotational speed;
Provided to be movable in the radial direction of the multi-layer hybrid disk driven to rotate by the spindle motor, record information by irradiating the information recording layer of the disk with laser light of a predetermined wavelength, and reflect An optical pickup capable of reproducing information recorded by receiving light;
An actuator for controlling the position of the optical pickup in the radial direction of the disk;
A control device for controlling at least the spindle motor and the actuator;
The optical pickup includes a laser generating element that irradiates laser light having at least two different wavelengths, and irradiates a multi-layer hybrid disk with laser light having a predetermined wavelength to each information recording layer having the plurality of structures. An information recording / reproducing apparatus capable of recording / reproducing information,
The control device moves the optical pickup by the actuator at the start of the first recording after the hybrid disc having the multi-layer structure is installed in the device, and the test writing area on one of the inner circumference and the outer circumference of the disc In step (2), trial writing is performed on all the recording / reproducing layers constituting the disk to determine the optimum power of the laser beam, and all of the disks constituting the disk are determined in the other trial writing area of the disk. Test writing is performed on the recording / reproducing layer of the recording medium to determine the optimum power of the laser beam, and the determined optimum power of the laser beam is recorded, and these recorded lasers are recorded in the subsequent recording operation. An information recording / reproducing apparatus characterized in that the recording is performed by using the optimum power of light.   2. The information recording / reproducing apparatus according to claim 1, wherein the control device includes a memory for recording an optimum power of the laser beam determined for all the recording / reproducing layers. Information recording / reproducing apparatus.   2. The information recording / reproducing apparatus according to claim 1, wherein the optical pickup includes at least a laser generating element that generates a laser beam having a wavelength of 405 nm, a laser generating element that generates a laser beam having a wavelength of 650 nm, and a wavelength. An information recording / reproducing apparatus comprising one or both of laser generating elements for generating 780 nm laser light.   4. The information recording / reproducing apparatus according to claim 3, wherein the optical pickup includes means for switching irradiation of laser light from the plurality of laser generating elements. A test writing method for performing test writing on a hybrid disc having a multi-layer structure,
At the beginning of the first recording after mounting the multi-layer hybrid disc in the apparatus,
In one test writing area on the inner periphery and outer periphery of the disc, trial writing is performed on all recording / reproducing layers constituting the disc to determine the optimum power of the laser beam,
In the other trial writing area of the disc, trial writing is performed on all the recording / reproducing layers constituting the disc to determine the optimum power of the laser beam,
A test writing method for an information recording / reproducing apparatus, wherein the optimum power of the laser beam determined above is recorded and used for controlling the power of the laser beam in a subsequent recording operation.   6. The test writing method according to claim 5, wherein when an error occurs during the execution of the test writing, the test writing is executed by reducing the rotational drive speed of the hybrid disk having the multi-layer structure. A trial writing method for an information recording / reproducing apparatus.   A hybrid disk having a multi-layer structure for performing the test writing method according to claim 5 is provided with at least one of a blue laser recording layer of BD or HD-DVD and one of a red laser recording layer of a DVD layer and a CD layer. Or a test writing method for an information recording / reproducing apparatus, characterized by comprising both of them.

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