WO2008053513A1 - Disc drive device and semiconductor device - Google Patents

Disc drive device and semiconductor device Download PDF

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Publication number
WO2008053513A1
WO2008053513A1 PCT/JP2006/321606 JP2006321606W WO2008053513A1 WO 2008053513 A1 WO2008053513 A1 WO 2008053513A1 JP 2006321606 W JP2006321606 W JP 2006321606W WO 2008053513 A1 WO2008053513 A1 WO 2008053513A1
Authority
WO
WIPO (PCT)
Prior art keywords
recording
disk
signal
disc
laser light
Prior art date
Application number
PCT/JP2006/321606
Other languages
French (fr)
Japanese (ja)
Inventor
Toshiya Matsuda
Yoshimi Iso
Hiroshi Tadokoro
Mikihiko Ishii
Original Assignee
Renesas Technology Corp.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renesas Technology Corp. filed Critical Renesas Technology Corp.
Priority to PCT/JP2006/321606 priority Critical patent/WO2008053513A1/en
Priority to JP2008541927A priority patent/JPWO2008053513A1/en
Priority to TW096140339A priority patent/TW200832378A/en
Publication of WO2008053513A1 publication Critical patent/WO2008053513A1/en

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
    • G11B19/128—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark involving the detection of track pitch or recording density
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
    • G11B19/127—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark involving detection of the number of sides, e.g. single or double, or layers, e.g. for multiple recording or reproducing layers

Definitions

  • the present invention relates to a technique for discriminating between a signal recording surface (data recording surface) and a non-signal recording surface of a recording disk in addition to a disk drive device, and further, is sensitive to laser light on the opposite surface of the data recording surface.
  • the present invention relates to a technique for discriminating a data recording surface and a drawing recording surface from a recording disc having a visible information recording surface (drawing recording surface) capable of recording visible information, for example, a multi-disc corresponding to a plurality of types of recording discs.
  • the present invention relates to a technology effective when applied to a drive device. Background art
  • Disk drive devices that are PC (personal computer) peripheral devices tend to support multiple media.
  • multi-disk drive devices play so-called CD-ROM playback and CD-R / RW recording.
  • Playback, DVD—ROM playback, DVD-R / RW, DVD + R / RW, DVD—RAM recording and playback are possible.
  • the multi-disk drive performs disk discrimination processing to determine the loaded media.
  • the reflected light of the disk surface force can be obtained by the amount of reflected light of each recording disk when irradiated with laser light and the focus search operation that moves the objective lens of the optical pickup up and down. Force Determines the type of recording disk based on the measurement time until the reflected light from the data recording surface is obtained.
  • a specific discrimination method is disclosed in Patent Documents 1 and 2.
  • Patent Document 1 JP 2000-311427 A
  • Patent Document 2 JP-A-2005-259252
  • Some disk drive devices have a laser label printing function.
  • the laser label printing function is a function for drawing a visible image such as a title or a photograph by irradiating the drawing recording surface made of laser-sensitive paint on the back surface of the data recording surface of the recording disk.
  • High-sensitivity drawing recording surface for the purpose of shortening drawing time by laser label printing
  • a recording disk having high sensitivity is provided, and a drawing surface having high sensitivity is high and has a reflectance, so that it is difficult to distinguish it from a data recording surface in terms of reflectance.
  • the data recording surface force The distance from the disc surface to the disc surface is almost equal to the distance from the drawing recording surface to the disc surface. It may be difficult to distinguish the faces.
  • An object of the present invention is to provide a disk drive device that can accurately distinguish a non-signal recording surface or a drawing recording surface of a loaded recording disk in a short time.
  • Another object of the present invention is to provide a semiconductor device suitable for control for accurately distinguishing a non-signal recording surface or a drawing / recording surface of a recording disk in a short time by irradiating a laser beam.
  • the non-signal recording surface of the recording disk mounted on the disk drive device can be accurately distinguished in a short time.
  • FIG. 1 is a block diagram generally showing a multi-disk drive device which is an example of a disk drive device according to the present invention.
  • FIG. 2 is a circuit diagram showing a detailed example of a photodetector and a high-frequency amplifier.
  • FIG. 3 is a waveform diagram illustrating a tracking error signal and a TZC signal.
  • FIG. 4 is a schematic longitudinal sectional view illustrating the basic structure of a DVD recording disk (DVD disk).
  • FIG. 5 is a schematic longitudinal sectional view illustrating the basic structure of a CD recording disk (CD disk).
  • FIG. 6 is a timing chart illustrating the principle of disc discrimination by focus search.
  • FIG. 7 is a waveform diagram illustrating a tracking error signal TER and a TZC signal obtained by drawing drawing surface force.
  • FIG. 8 is an operation flowchart of disk discrimination processing under the control of a microcontroller.
  • FIG. 9 is a circuit diagram showing another example relating to the presence / absence of track crossing in steps S7 and S8 in FIG.
  • FIG. 10 is a circuit diagram showing still another example relating to the determination of the presence or absence of track crossing in steps S7 and S8 in FIG.
  • FCA 9 Focus Actuator
  • Threadactivator TAA
  • RF A High frequency amplifier
  • FCNT Focus servo control circuit
  • a disk drive device (1) includes: an optical pickup (4) force applied to a recording disk (2) mounted; According to the determination result, focus servo control and tracking servo control are performed to record and reproduce information on the signal recording surface (DL) of the recording disk, and non-signal of the recording disk. Visible information can be recorded by irradiating the recording surface (VL) with laser light. In the disk discrimination process, the recording disk is irradiated with laser light to perform the focus servo control and to keep the distance between the pickup objective lens (7) and the laser light receiving surface constant without performing the tracking servo control.
  • a tracking error signal (TER) is generated, and when a track crossing is not detected within a predetermined time based on the tracking error signal, the laser light receiving surface of the recording disk Discriminant result signal (27) indicating that is other than the signal recording surface.
  • Output from the host interface circuit (25).
  • the host interface circuit power discrimination result signal is output, the host device can perform appropriate processing on the discrimination result.
  • a laser is applied to the non-signal recording surface of the recording disc. Visible information recording operation that records visible information by irradiating light is enabled.
  • the number of pulses (TER-P) obtained by binarizing the tracking error signal is equal to or less than a predetermined number within a predetermined time during the disc discrimination process, It is determined that the laser beam irradiation surface is other than the signal recording surface. Judgment using the tracking error signal can be facilitated.
  • it further includes a hysteresis comparator (23) for binarizing the tracking error signal, and in the disc discrimination processing, the discrimination is performed using the noise output from the hysteresis comparator. .
  • the effect of noise can be reduced compared to a simple binary key.
  • the disc discriminating process when the amplitude of the tracking error signal is below a certain level within a predetermined time, it is discriminated that the laser light irradiation surface of the recording disc is other than the signal recording surface. To do.
  • the CPU can make a distinction by calculating the AZD conversion result of the tracking error signal.
  • the number of pulses of the binarized tracking error signal is less than a certain number within a predetermined time, and the amplitude of the tracking error signal is within a predetermined time. Is below a certain level, it is determined that the laser light irradiation surface of the recording disk is other than the signal recording surface. Remarkably high in discrimination results! ⁇ Reliability can be obtained.
  • the disk drive device irradiates the mounted recording disk with laser light via an objective lens, and photoelectrically converts the reflected light of the recording disk force with a photodetector (8).
  • An optical pickup that enables the objective lens to be moved within the focal depth by the first character (9), and the pickup is moved in the radial direction of the recording disk.
  • a focus servo control circuit for controlling the first character so as to keep the distance between the recording disk and the laser light receiving surface of the recording disk constant, and the pickup is connected to the recording disk based on the tracking error signal.
  • the disc discriminating process is performed by irradiating the mounted recording disc with laser light. As a result, information can be recorded and reproduced on the signal recording surface of the recording disk according to the determination result.
  • the data processing circuit irradiates the recording disk with laser light, and the focus servo control circuit keeps the distance between the pickup lens and the laser light receiving surface of the recording disk constant.
  • a semiconductor used for servo control for irradiating a fixed position of a recording disk with laser light and signal processing for recording and reproducing information on a signal recording surface of the recording disk includes an amplifier (12) that generates a focus error signal and a tracking error signal based on the photoelectric conversion signal of the reflected light of the recording disk force irradiated with the laser beam, and based on the focus error signal.
  • a focus servo control circuit (15) for performing servo control to keep the distance between the objective lens and the laser light receiving surface of the recording disk constant, and an optical pickup having the objective lens and a laser light source are tracked.
  • the arithmetic processing unit irradiates the recording disk with laser light, and the focus servo control circuit maintains the distance between the pickup lens and the laser light receiving surface of the recording disk constant.
  • the amplifier, the focus servo control circuit, the tracking servo control circuit, the arithmetic processing device, and the single chip or multichip constituting the nonvolatile memory are provided as one piece. It is sealed in a package.
  • FIG. 1 shows an overall configuration of a multi-disk drive device 1 which is an example of a disk drive device according to the present invention.
  • the recording disk 2 to be played and recorded by the multi-disc drive 1 shown in the figure is CD-ROM, CD-R / RW, DVD-ROM, DVD-R / RW, DVD + R / RW, DVD—
  • a laser label printing function for drawing a visible image by irradiating a laser beam onto a drawing recording surface made of a laser-sensitive paint provided on the back surface of the data recording surface of the recording disk 2 Prepare.
  • the multi-disk drive 1 shown in the figure includes an optical pickup (optical pickup) 4 that irradiates a recording disk 2 rotated by a disk motor (DM) 3 with laser light.
  • DM disk motor
  • the optical pickup 4 includes a laser light source 5, a beam splitter 6, an objective lens 7 (also referred to as a condensing lens), and an optical system having an isotropic force, and a mechanical focus checker for displacing the objective lens 7. (FCA) 9 and tracking actuator (TRA) 10.
  • the focus actuator 9 is supported in an inertial manner so that the objective lens 5 can be moved in the thickness direction of the recording disk.
  • the tracking actuator 10 enables the objective lens 5 that is supported by inertia to move in the radial direction of the recording disk 2 (in the transverse direction of the information track).
  • the pickup 4 itself can be reciprocated along the radial direction of the recording disk 2 by a thread actuator (THA) 11.
  • a laser light source 5 in the optical pickup 4 includes a laser diode (not shown), a drive circuit for emitting a laser diode, and a not-shown for converting the divergent laser light emitted from the laser diode into parallel light. It has a collimating lens and emits parallel laser light.
  • the laser beam is incident on the objective lens 7 with its optical path bent by the beam splitter 6.
  • the objective lens 7 converges the light beam of the laser beam on the data recording surface or drawing / recording surface of the recording disk 2.
  • the light reflected by the recording disk 2 enters the photodetector 8 via the objective lens 7 and the beam splitter 6.
  • the photodetector 8 receives a change in intensity of the reflected light from the recording disk 1 and supplies a photoelectrically converted signal to a high frequency amplifier (RFA) 12.
  • the high-frequency amplifier 12 converts the output signal of the optical detector 8 from current to voltage, then adds and subtracts it, and generates a tracking error signal TER whose signal level and polarity change according to the amount of deviation between the objective lens 5 and the information track. Generate.
  • the high-frequency amplifier 12 includes a focus error signal FER whose signal level is changed according to the defocus amount (deviation amount from the focus) of the laser beam from the output signal of the photodetector 8, and the polarization plane of the return light. Generates a data playback signal (EFM signal) RF that changes its signal level in response to changes in.
  • EFM signal data playback signal
  • the tracking error signal TER and the focus error signal FER are used for position control of the pickup 4 with respect to the radial direction of the recording disk 2 and position control of the objective lens 7 with respect to the pickup 4.
  • the position control is servo control or program control.
  • Servo control uses focus servo control circuit (FCNT) 15 and tracking servo control circuit (TCN T) 16.
  • Microcontroller (SCNT) 17 is used for program control.
  • the selectors 1, 8, 19, 20 selectively form a serve loop.
  • the microcontroller 17 causes the selector 1 8 to supply the output of the focus servo control circuit 15 to the focus actuator 5, a focus servo loop including the photodetectors 8, RFA12, FER, FCNT15, and FCA9 is formed.
  • the FCA 9 is driven so that the objective lens 7 is positioned within the depth of focus.
  • the microcontroller 17 causes the selectors 19 and 20 to supply the output of the tracking servo control circuit 16 to the tracking actuator 10 and the thread actuator 11 so that the photodetectors 8, RFA12, TER, TCNT16, TRA10, A tracking servo loop including THAI 1 is formed so that the objective lens follows the information track on the data recording surface.
  • TRA10 and THA11 are driven.
  • the microcontroller 17 controls the overall operation of the disk drive device 1 by reading the program stored in the flash memory (FL ASH) 22 and sequentially executing the program.
  • the microphone port controller 17 When performing position control by program control, the microphone port controller 17 causes the selectors 18, 19, and 20 to select the drive signal output from the microcontroller 17.
  • the microcontroller 17 refers to the focus error signal FER while moving the objective lens 7 in the front / back direction of the recording disk 2 so that the objective lens is focused on the data recording surface or the drawing recording surface within the depth of focus range. Can be detected.
  • the microcontroller 17 can detect the crossing of the information track based on the tracking error signal TER while moving the objective lens 7 in the radial direction of the recording disk 2.
  • the tracking error signal TER is supplied to the microcontroller 17 as a tracking error pulse TER-P binarized by a pulse generation circuit (PLS) 23.
  • PLS pulse generation circuit
  • the data reproduction signal RF is supplied to a signal processing / reproduction circuit (SIG) 24, subjected to binary signal filtering and filtering by digital signal processing, and subjected to decoding, error correction, format conversion, etc.
  • SIG signal processing / reproduction circuit
  • the data recorded in 2 is played back.
  • the reproduced data is given from a microcontroller 17 to a host device (HST) 26 such as a personal computer or workstation via a host interface (HIS) 25.
  • HST host device
  • HAT host device
  • HAT host interface
  • the host device 34 gives operation commands and control data to the disk drive device and instructs the microcontroller 1 to operate the multi-disk drive device 1.
  • the basic operations of the multi-disk drive unit 1 are disc discriminating operation for discriminating the type of the recording disc loaded, data recording operation for the data recording surface of the disc for which the disc type is discriminated, and recording disc for which the disc type has been discriminated. This is the data reproduction operation for reading the data and the laser label printing operation for the drawing and recording surface of the recording disk. The details of the discrimination operation will be described later. Basically, the amount of reflected light from the recording disk 2 irradiated with laser light, and the focus search operation in which the pickup objective lens is moved in the vertical direction from the surface of the disk. The disc type is discriminated based on the measurement time until the reflected light from the force data recording surface is obtained.
  • Positioning by focus servo and tracking servo is used in recording and playback operations. Read and write recorded information.
  • the microcontroller 17 controls the objective lens 7 by program control to the innermost circumference of the drawing recording surface. Force Move toward the outermost circumference in small increments, and in synchronization with this, turn on the laser light source or control the emission intensity according to the drawing data.
  • FIG. 2 shows a detailed example of the photodetector and the high frequency amplifier.
  • Fig. 2 focuses on the circuit configuration that functions in the disc discrimination operation.
  • the photodetector 8 detects the reflected light spot by dividing it into four photodiodes A, B, C, and D. Photoelectric conversion signals from the photodiodes A, B, C, and D are supplied to the high-frequency amplifier 12 through the buffers 31-A, 31-B, 31-C, and 31-D.
  • the current adding circuit 37 adds the current signals for all the photodiodes A to C to generate the data reproduction signal RF.
  • the data reproduction signal RF is converted from an analog signal to a digital signal by the AZD unit 38 and supplied to the SIG 24.
  • the current signals related to the photodiodes A and C arranged diagonally are added by the current adding circuit 32—AC and converted into a voltage signal.
  • the current signals related to the photodiodes B and D arranged diagonally are added by the current adding circuit 32-BD and converted into a voltage signal.
  • the output voltage of the current adder circuit 32—AC, 32—BD is subtracted by the subtractor circuit 33 to obtain the force error signal FER.
  • the focus error signal FER is converted to a digital signal by the AZD converter 34 and supplied to the FCNT 15 and the like.
  • the main spot is formed into a circular shape that uniformly converges on each photodiode A to D by the action of the optical system. If it is too close, the main spot is shaped like an ellipse condensing on the photodiodes A and C side due to the action of the optical system. When the distance is too far, the optical system has an elliptical shape condensing on the photodiodes B and D side. Therefore, when the depth of focus is met, the output of the subtraction circuit 33 is set to zero, and takes values with different polarities before and after that.
  • the focus error signal FER has an amplitude corresponding to the shift amount from the focal position and a polarity corresponding to the shift direction.
  • the focus actuator 9 is operated so that the focus error signal F ER becomes zero.
  • the output of FCNT15 is D
  • the digital signal is converted into an analog signal by ZA conversion 39 and supplied to FCA9.
  • the current signals related to the photodiodes D and D arranged on the left side of the light spot are added by the current addition circuit 32-AD and converted into a voltage signal.
  • the current signals related to the photodiodes B and C arranged on the right side of the light spot are added by the current adding circuit 32-BC and converted into a voltage signal.
  • the output voltage of the current adder circuit 32—AD, 32—BC is subtracted by the subtractor circuit 35 and used as the tracking error signal TER.
  • the output of the subtracting circuit 34 is set to zero if the light spot is symmetrical with respect to the information track, the amplitude changes according to the amount of deviation to the left and right, and the polarity of the amplitude differs between the left and right. .
  • the tracking actuator 10 is operated so that the tracking error signal TER becomes zero.
  • the pulse generation circuit 23 that receives the tracking error signal TER includes, for example, a hysteresis comparator. As shown in Fig. 3, when the tracking servo is deactivated and the focus servo is applied, the tracking error that approximates a sine waveform when the pickup is crossed the information track on the data recording surface by program control. Signal TER is formed.
  • the threshold level on the high level side of hysteresis comparator 23 is VTH
  • the threshold level on the low level side is VTL
  • the tracking error pulse TRER—P is essentially a TZC (tracking zero cross) signal.
  • the microcontroller 17 uses the thread actuator 11 to move the pickup in the radial direction of the optical disk, and thereby counts the number of crossing tracks by counting the number of clocks of the tracking error pulse TRER-P. Can be gripped.
  • the tracking error pulse TRER-P is also used in the disk discrimination operation. The control for disc discrimination is described in detail below.
  • FIG. 4 illustrates the basic structure of a DVD recording disk (DVD disk)
  • FIG. 5 illustrates the basic structure of a CD recording disk (CD disk).
  • FF is the front surface of the recording disk
  • BF is the back surface of the recording disk
  • DL is the data recording surface
  • VL is the drawing recording surface.
  • Both DVD discs and CD discs have a standardized thickness of 1.2 mm.
  • the distance from the disc surface FF to the data recording surface DL is also standardized as 0.6 mm for DVD discs and 1.1 mm for CD discs.
  • the surface reflectance of the recording disk and the reflectance of the data recording surface are greatly different between DVD-ROM and DVD player R and other recording disks.
  • DVD Player RW has a large difference in reflectance from other recording discs.
  • DVD-RAM has a disc management area different from other recording discs, and between CD discs. There are differences in the standards described in Fig. 4 and Fig. 5. In the disc discrimination process, the disc type is discriminated in accordance with the difference in reflectance, disc management area, and standard.
  • FIG. 6 illustrates the principle of discriminating using focus search.
  • the focus search focuses on the front surface FF (rear surface BF), and then Focus on data recording surface DL (drawing recording surface VL). Since the amount of reflected light increases when focused, the position at which the focus is focused and the reflection level at that position can be obtained by measuring the level of the amount of reflected light based on the signal RF. Based on the difference between the first detection time and the next detection time, the distance between the front surface FF (back surface BF) and the data recording surface DL (drawing recording surface VL) can be determined.
  • Waveform Wa is the waveform of the amount of reflected light when focus search is performed by irradiating laser light from the surface FF of the DVD disk.
  • Waveform Wd is when focus search is performed by irradiating laser light from the surface FF of the CD disk. This is the waveform of the amount of reflected light.
  • the difference between the surface FF force and the data recording surface DL is large between DVD discs and CD discs.
  • the difference between the measurement times Ta and Td can be distinguished by the threshold time Tth-H.
  • Wb is the waveform of the amount of reflected light when the focus search is performed by irradiating the laser beam from the back surface BF of the DVD disc.
  • the recording / recording surface VL with high photosensitivity like the waveform Wb has substantially the same reflectivity as the data recording surface DL of the DVD player RW. It is difficult to distinguish between the recording surface DL and the drawing recording surface VB.
  • the image recording surface VL with a low photosensitivity like the waveform Wc the reflectivity is lower than that of the data recording surface DL, so there is a difference in the amount of reflected light. It is possible to identify the data recording surface DL and the drawing recording surface VL.
  • DVD discs include DVD-ROM, DV D ⁇ R, DVD player RW, and DVD-RAM, but DVD-ROM and DVD player R have more data than surface reflectivity compared to DVD player RW and DVD-RAM. Since the reflectance of the recording surface is 3 to 4 times higher, it can be distinguished from each other by the difference in the amount of reflected light. However, since the reflectivity of the drawing recording surface is smaller than that of the data recording surface, it is possible to distinguish the data recording surface of the DVD-ROM and DVD player R from the drawing recording surface. Of particular concern is the reflectivity of the drawing / recording surface VL with high photosensitivity that approximates the reflectivity of the data recording surface of DVD RW.
  • the data recording surface DL can be distinguished from the drawing recording surface VL by taking into account the level difference in the amount of reflected light.
  • Waveform We is the waveform of the amount of reflected light when focus search is performed by irradiating the laser beam from the back surface BF of the CD disc. Since the measurement time Te is very short, the judgment threshold time Tth-L can be used.
  • the data recording surface DL of the disc as well as the data recording surface DL and the drawing recording surface VL of the DVD disc can be easily distinguished.
  • the tracking error signal TER is used to enable the distinction between the high-sensitivity drawing / recording surface VL and the data recording surface DL of the DVD RW disc, which are difficult to distinguish in the focus search. That is, as shown in FIG. 7, since there is no information track on the drawing / recording surface VL, the periodic signal component as shown in FIG. 3 does not occur in the tracking error signal TER, and it fluctuates slightly depending on the noise component. It is. High level of hysteresis comparator 23 If the amplitude of the noise component is between the threshold level VTH on the bell side and the threshold level VTL on the low level side, the tracking error pulse TER—P (TZC) is fixed at the low level.
  • the microcontroller 17 moves the pickup 4 in the radial direction of the recording disk 2 with the focus servo applied, and the number of pulses obtained within a predetermined time such as the tracking error pulse TER-P must reach a predetermined value. In other words, it is determined that the data is not recorded.
  • the disc discrimination process uses both the focus search and the determination based on the tracking error pulse TER-P, so that the high-sensitivity drawing / recording surface VL and the data recording surface DL of the DVD RW disc can be used. Can also be distinguished.
  • FIG. 8 illustrates a disk discrimination process flow under the control of the microcontroller 17.
  • the microcontroller 17 starts disc discrimination processing when the recording disc 2 is inserted.
  • a DVD laser is emitted (Sl), and a focus search is started (S2).
  • S3 the time between the increase in the amount of reflected light that increases on the front surface FF (back surface BF) and the data recording surface DL (drawing recording surface VL) of the loaded recording disk 2 and the reflected light are measured.
  • Level detection is performed (S3).
  • the reflected light level is also detected during the focus search operation.
  • disc determination processing is performed (S4).
  • the data recording surface DL of CD discs indicates that the front side FF (back side BF) when the focus search is performed. ) And data recording surface DL (drawing recording surface VL).
  • the data recording surface DL of a DVD-ROM or DVD player R can be identified by its reflected light level.
  • the data recording surface DL of a DVD-RAM disk is also managed with other media. Because the areas are different, they can be identified. As mentioned above, it is not possible to identify whether the DV D player RW disc is the data recording surface DL by the reflected light level. This is because there is no big difference between the reflectance of the data recording surface DL and the reflectance of the high-sensitivity drawing / recording surface VL on the DVD RW disc!
  • the result is that the recording disk loaded is one of the data recording surfaces DL of DVD-ROM, DVD ⁇ R, DVD-RAM, CD-ROM, CD-R, or CD-RW.
  • the result is notified to the host device (S5).
  • the result is obtained when the drawing recording surface VL is on the DVD player RW or any recording disk 2.
  • confirm that tracking servo control is not being performed S6
  • force servo control move the pickup 4 in the radial direction of the recording disk 2 while moving the tracking error pulse TER_P.
  • Reference for a certain period (S7).
  • the fixed period needs to be a time that can cross at least a plurality of information tracks, for example, 30 msec.
  • the reference is, for example, counting the number of tracking error pulses TER-P. It is determined whether or not there is a track crossing with respect to the counting result (S8). For example, if the count value is smaller than the number n of tracks that can be traversed during the measurement time and is less than several m (0 ⁇ m ⁇ n), it is determined that there is no track crossing. If there is a crossing of the track, it is determined that the data recording surface of the DVD player RW is DL (S9), and the determination result is notified to the host device (S10). If there is no crossing of the track, it is determined that the drawing recording surface of any recording disk (S11), and the determination result is notified to the host device (S12).
  • This notification is given to the host device 26 as the discrimination result signal 27 via the host interface 25 of FIG.
  • the microcontroller 17 is instructed to print the laser label. 17 starts control for recording visible information by irradiating the drawing / recording surface VL of the recording disk 2 with laser light.
  • the host device 26 is executing a support program for reproducing recorded data or recording data, an error is displayed in response to the determination result signal 27.
  • the data recording surface and the drawing recording surface of the recording disk can be accurately determined.
  • it is possible to detect the presence or absence of track crossing based on the tracking error signal only when the focus servo is turned on it is possible to shorten the processing time for data recording force drawing and recording force.
  • the focus search and reflected light measurement accuracy do not have to be particularly high, it is not necessary to prepare an AZD change with extremely high conversion accuracy, and the measurement does not take much time.
  • hysteresis comparator 23 is used, it is not easily affected by noise.
  • FIG. 9 shows another example relating to the determination of the presence or absence of track crossing in steps S 7 and S 8 of FIG.
  • the tracking error signal TER is converted from an analog signal to a digital signal by AZD conversion 40, and the converted tracking error data TER D is converted to a microcomputer. Entered by Trawler 17A.
  • the microcontroller 17A discriminates from the tracking error data TER-D whether the amplitude of the tracking error signal is below a certain level within a predetermined time (for example, 30 msec) after step S6 in FIG.
  • the constant level is, for example, a level that is smaller than the amplitude of the tracking error signal obtained by crossing the track and larger than the amplitude due to noise, for example, 200 mV.
  • Microcontroller 17A determines that there is no track crossing when it detects that the amplitude of the tracking error signal is below a certain level, and it determines that there is track crossing when it detects that it exceeds a certain level. Since the other configuration is the same as before, detailed description thereof is omitted. This also provides the same effect as described above. Noise effects can be eliminated without using a hysteresis comparator.
  • FIG. 10 shows still another example relating to the presence / absence of track crossing in steps S7 and S8 in FIG. Figure 10 has the configuration of Figure 9 and Figure 2 together.
  • the microcontroller 17B receives the tracking error pulse TER—P output from the hysteresis comparator 23 and the tracking error data TER_D output from the A / D conversion 40. In the disc discrimination process, the microcontroller 17B counts the tracking error pulse TER-P for a certain period in the same manner as steps S7 and S8 in FIG. 8 to determine whether or not there is a track crossing, and from the tracking error data TER-D.
  • the presence or absence of track crossing is determined by determining whether the amplitude of the tracking error signal is below a certain level within a predetermined time. If both judgment results match, the judgment result is adopted, and if they do not match, the judgment process is repeated. Compared to the previous examples, higher accuracy can be obtained in the judgment results.
  • the circuit block shown by 42 is not particularly limited, but may be a SOC (system 'on' chip) LSI formed on a single semiconductor chip.
  • SOC system 'on' chip
  • the flash memory 22 is configured with another semiconductor chip for the LSI 42, a SIP (system-in-package) semiconductor device in which a multi-chip of the LSI 42 and the flash memory 22 is sealed in a single package.
  • Adopt 28 when the flash memory 22 is configured with another semiconductor chip for the LSI 42, a SIP (system-in-package) semiconductor device in which a multi-chip of the LSI 42 and the flash memory 22 is sealed in a single package.
  • Adopt 28 the circuit block shown by 42 is not particularly limited, but may be a SOC (system 'on' chip) LSI formed on a single semiconductor chip.
  • the microcontroller 17 may be a microcomputer having a CPU (central processing unit) and its peripheral circuits.
  • the present invention can also be applied to control for discriminating a non-signal recording surface such as a title printing surface in a recorded DVD-ROM that is not only based on the discrimination of the drawing / recording surface, and the processing can be accurately performed in a short time. It becomes possible to do.
  • the present invention is applicable to recording disk drive devices for PC peripheral devices such as CD-R, DVD-R, and DVD-RAM. It can also be applied to consumer DVD recorders.

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  • Optical Recording Or Reproduction (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

In a disc drive device (1), disc discriminating process is performed by irradiating a mounted recording disc (2) with laser beams from an optical pickup (4), focus servo control and tracking servo control are performed based on the discrimination results, and information recording and reproduction can be performed to and from a signal recording surface of the recording disc. When the optical pickup is shifted in the radius direction of the recording disc while using focus servo in the disc discriminating process, existence of track traverse is detected based on a tracking error signal (TER) within a prescribed time, and when there is not, the surface is recognized as a non signal recording surface, for instance, a laser label printing surface coated with a laser-photosensitive coat material. By using the tracking error signal, control for correctly discriminating the non signal recording surface of the recording disc can be performed in a short time.

Description

明 細 書  Specification
ディスクドライブ装置及び半導体装置  Disk drive device and semiconductor device
技術分野  Technical field
[0001] 本発明はディスクドライブ装置にぉ 、て記録ディスクの信号記録面 (データ記録面） と非信号記録面とを判別する技術、更には、データ記録面の反対面にレーザ光に感 光して可視情報を記録可能な可視情報記録面 (描画記録面)を有する記録ディスク に対してデータ記録面と描画記録面とを判別する技術に関し、例えば複数種類の記 録ディスクに対応したマルチディスクドライブ装置に適用して有効な技術に関する。 背景技術  [0001] The present invention relates to a technique for discriminating between a signal recording surface (data recording surface) and a non-signal recording surface of a recording disk in addition to a disk drive device, and further, is sensitive to laser light on the opposite surface of the data recording surface. The present invention relates to a technique for discriminating a data recording surface and a drawing recording surface from a recording disc having a visible information recording surface (drawing recording surface) capable of recording visible information, for example, a multi-disc corresponding to a plurality of types of recording discs. The present invention relates to a technology effective when applied to a drive device. Background art
[0002] PC (パーソナルコンピュータ)周辺機器であるディスクドライブ装置は複数のメディ ァに対応する傾向にあり、例えば、マルチディスクドライブ装置は、いわゆる CD— R OMの再生、 CD— R/RWの記録再生、 DVD— ROMの再生、 DVD-R/RW, D VD+R/RW, DVD— RAMの記録再生が可能である。マルチディスクドライブは 装着されたメディアを判定するためのディスク判別処理を行なう。例えばレーザ光が 照射されたときの各種記録ディスクの反射光量の大きさ、さらに光学的なピックアップ の対物レンズを上下方向に移動させるフォーカスサーチ動作にぉ 、てディスク表面 力 の反射光が得られて力 データ記録面からの反射光が得られるまでの計測時間 を基に、記録ディスクの種類を判別する。具体的な判別手法については特許文献 1 及び 2に開示がある。  [0002] Disk drive devices that are PC (personal computer) peripheral devices tend to support multiple media. For example, multi-disk drive devices play so-called CD-ROM playback and CD-R / RW recording. Playback, DVD—ROM playback, DVD-R / RW, DVD + R / RW, DVD—RAM recording and playback are possible. The multi-disk drive performs disk discrimination processing to determine the loaded media. For example, the reflected light of the disk surface force can be obtained by the amount of reflected light of each recording disk when irradiated with laser light and the focus search operation that moves the objective lens of the optical pickup up and down. Force Determines the type of recording disk based on the measurement time until the reflected light from the data recording surface is obtained. A specific discrimination method is disclosed in Patent Documents 1 and 2.
[0003] 特許文献 1：特開 2000-311427号公報  [0003] Patent Document 1: JP 2000-311427 A
特許文献 2：特開 2005-259252号公報  Patent Document 2: JP-A-2005-259252
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0004] ディスクドライブ装置の中にはレーザラベル印刷機能を備えたものもある。レーザラ ベル印刷機能とは、記録ディスクのデータ記録面の裏面にレーザ感光性の塗料から 成る描画記録面にレーザ光を照射してタイトルや写真等の可視像を描画する機能で ある。レーザラベル印刷による描画時間の短縮を目的として高感光度の描画記録面 を有する記録ディスクが提供されおり、高感光度の描画記録面は高 、反射率を有す ることから、反射率の点でデータ記録面と区別し難いものがある。また、 DVD系の記 録ディスクではデータ記録面力 ディスク表面までの距離と、描画記録面からディスク 表面までの距離とがほぼ等しいことから、フォーカスサーチ動作による計測時間では 、データ記録面と描画記録面を区別し難い場合がある。このように、ディスク判別処 理の対象に描画記録面を有する記録ディスクも加わると、その反射率の点でデータ 記録面と区別がつきにくぐさらに記録ディスク裏面力も描画記録面までの距離も複 数種類に亘り、ディスク判別処理が複雑になってしまう。 [0004] Some disk drive devices have a laser label printing function. The laser label printing function is a function for drawing a visible image such as a title or a photograph by irradiating the drawing recording surface made of laser-sensitive paint on the back surface of the data recording surface of the recording disk. High-sensitivity drawing recording surface for the purpose of shortening drawing time by laser label printing A recording disk having high sensitivity is provided, and a drawing surface having high sensitivity is high and has a reflectance, so that it is difficult to distinguish it from a data recording surface in terms of reflectance. Also, for DVD recording discs, the data recording surface force The distance from the disc surface to the disc surface is almost equal to the distance from the drawing recording surface to the disc surface. It may be difficult to distinguish the faces. As described above, when a recording disk having a drawing recording surface is added to the disc discrimination processing target, it is difficult to distinguish it from the data recording surface in terms of the reflectance. Further, the recording disk back surface force and the distance to the drawing recording surface are also complicated. There are several types of disc identification processes that are complicated.
[0005] 本発明の目的は、装着された記録ディスクの非信号記録面若しくは描画記録面を 短時間で正確に区別することができるディスクドライブ装置を提供することにある。本 発明の別の目的はレーザ光を照射して記録ディスクの非信号記録面若しくは描画記 録面を短時間で正確に区別する制御に好適な半導体装置を提供することにある。  [0005] An object of the present invention is to provide a disk drive device that can accurately distinguish a non-signal recording surface or a drawing recording surface of a loaded recording disk in a short time. Another object of the present invention is to provide a semiconductor device suitable for control for accurately distinguishing a non-signal recording surface or a drawing / recording surface of a recording disk in a short time by irradiating a laser beam.
[0006] 本発明の前記並びにその他の目的と新規な特徴は本明細書の記述及び添付図面 力 明らかになるであろう。  [0006] The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.
課題を解決するための手段  Means for solving the problem
[0007] 本願において開示される発明のうち代表的なものを簡単に説明すれば下記のとお りである。 [0007] A representative one of the inventions disclosed in the present application will be briefly described as follows.
[0008] すなわち、ディスク判別処理にぉ 、てフォーカスサーボをかけながら光学的なピック アップを記録ディスクの半径方向に移動したとき、一定時間内にトラッキング誤差信 号に基づいてトラック横断の有無を検出し、無ければ非信号記録面と判断する。トラ ッキング誤差信号を用いることにより、記録ディスクの非信号記録面を短時間で正確 に区別する制御が可能になる。  [0008] That is, when the optical pickup is moved in the radial direction of the recording disk while applying the focus servo during the disc discrimination process, the presence / absence of track crossing is detected based on the tracking error signal within a certain time. If not, it is determined as a non-signal recording surface. By using the tracking error signal, it becomes possible to accurately control the non-signal recording surface of the recording disk in a short time.
発明の効果  The invention's effect
[0009] 本願において開示される発明のうち代表的なものによって得られる効果を簡単に説 明すれば下記の通りである。  [0009] The effects obtained by the representative ones of the inventions disclosed in the present application will be briefly described as follows.
[0010] すなわち、ディスクドライブ装置に装着された記録ディスクの非信号記録面を短時 間で正確に区別することができる。 That is, the non-signal recording surface of the recording disk mounted on the disk drive device can be accurately distinguished in a short time.
図面の簡単な説明 [0011] [図 1]本発明に係るディスクドライブ装置の一例であるマルチディスクドライブ装置を 全体的に示すブロック図である。 Brief Description of Drawings FIG. 1 is a block diagram generally showing a multi-disk drive device which is an example of a disk drive device according to the present invention.
[図 2]光検出器及び高周波アンプの詳細な一例を示す回路図である。  FIG. 2 is a circuit diagram showing a detailed example of a photodetector and a high-frequency amplifier.
[図 3]トラッキング誤差信号と TZC信号を例示する波形図である。  FIG. 3 is a waveform diagram illustrating a tracking error signal and a TZC signal.
[図 4]DVD系の記録ディスク（DVDディスク）の基本構造を例示する概略縦断面図で ある。  FIG. 4 is a schematic longitudinal sectional view illustrating the basic structure of a DVD recording disk (DVD disk).
[図 5]CD系の記録ディスク（CDディスク）の基本構造を例示する概略縦断面図である  FIG. 5 is a schematic longitudinal sectional view illustrating the basic structure of a CD recording disk (CD disk).
[図 6]フォーカスサーチによるディス判別の原理を例示するタイミングチャートである。 FIG. 6 is a timing chart illustrating the principle of disc discrimination by focus search.
[図 7]描画記録面力 得られるトラキング誤差信号 TERと TZC信号を例示する波形 図である。  FIG. 7 is a waveform diagram illustrating a tracking error signal TER and a TZC signal obtained by drawing drawing surface force.
[図 8]マイクロコントローラの制御によるディスク判別処理の動作フローチャートである  FIG. 8 is an operation flowchart of disk discrimination processing under the control of a microcontroller.
[図 9]図 8のステップ S7、 S8におけるトラック横断の有無判定に関する別の例を示す 回路図である。 FIG. 9 is a circuit diagram showing another example relating to the presence / absence of track crossing in steps S7 and S8 in FIG.
[図 10]図 8のステップ S7、 S8におけるトラック横断の有無判定に関する更に別の例を 示す回路図である。  FIG. 10 is a circuit diagram showing still another example relating to the determination of the presence or absence of track crossing in steps S7 and S8 in FIG.
符号の説明  Explanation of symbols
[0012] 1 マルチディスクドライブ装置 [0012] 1 Multi-disk drive device
2 記録ディスク  2 Recording disc
3 ディスクモータ（DM)  3 Disc motor (DM)
4 光学的なピックアップ  4 Optical pickup
5 レーザ光源  5 Laser light source
6 ビームスプリッタ  6 Beam splitter
7 対物レンズ  7 Objective lens
9 フォーカスァクチエータ（FCA)  9 Focus Actuator (FCA)
10 トラッキングァクチエータ (TRA)  10 Tracking Actuator (TRA)
11 スレッドァクチエータ（THA) 12 高周波アンプ (RF A) 11 Threadactivator (THA) 12 High frequency amplifier (RF A)
TER トラッキング誤差信号  TER tracking error signal
FER フォーカス誤差信号  FER Focus error signal
RF データ再生信号 (EFM信号）  RF data playback signal (EFM signal)
15 フォーカスサーボ制御回路（FCNT)  15 Focus servo control circuit (FCNT)
16 トラッキングサーボ制御回路 (TCNT) 16  16 Tracking servo control circuit (TCNT) 16
17 マイクロコントローラ (SCNT)  17 Microcontroller (SCNT)
18, 19, 20 セレクタ  18, 19, 20 selector
23 パルス発生回路（ヒステリシスコンパレータ）  23 Pulse generator (hysteresis comparator)
25 ホストインタフェース（HIS)  25 Host interface (HIS)
27 判別結果信号  27 Discrimination result signal
28 半導体装置  28 Semiconductor devices
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0013] 1.代表的な実施の形態  [0013] 1. Representative Embodiment
先ず、本願において開示される発明の代表的な実施の形態について概要を説明 する。代表的な実施の形態についての概要説明で括弧を付して参照する図面の参 照符号はそれが付された構成要素の概念に含まれるものを例示するに過ぎない。  First, an outline of typical embodiments of the invention disclosed in the present application will be described. Reference numerals in the drawings referred to in parentheses in the outline description of the representative embodiments merely exemplify what are included in the concept of components to which the reference numerals are attached.
[0014] 〔1〕本発明の代表的な実施の形態に係るディスクドライブ装置（1)は、装着された 記録ディスク（2)に光学的なピックアップ (4)力 レーザ光を照射してディスク判別処 理を行ない、その判別結果に従って、フォーカスサーボ制御とトラッキングサーボ制 御を行って前記記録ディスクの信号記録面 (DL)には情報の記録と再生が可能であり 、且つ前記記録ディスクの非信号記録面 (VL)にはレーザ光を照射して可視情報を 記録可能である。前記ディスク判別処理は、レーザ光を前記記録ディスクに照射して 前記フォーカスサーボ制御を行い且つ前記トラッキングサーボ制御を行わずにピック アップの対物レンズ（7)とレーザ光受光面との距離を一定に保ちながらピックアップを 前記記録ディスクの半径方向に移動させてトラッキング誤差信号 (TER)を生成し、トラ ッキング誤差信号に基づいて所定時間内にトラック横断を検出しないとき、前記記録 ディスクのレーザ光受光面が信号記録面以外であることを示す判別結果信号 (27)を ホストインタフェース回路 (25)から出力する。トラッキング誤差信号を用いることにより 、記録ディスクの非信号記録面を短時間で正確に区別する制御が可能になる。ホスト インタフェース回路力 判別結果信が出力されるので、判別結果に対してホスト装置 は適切な処理を行うことが可能になる。 [1] A disk drive device (1) according to a typical embodiment of the present invention includes: an optical pickup (4) force applied to a recording disk (2) mounted; According to the determination result, focus servo control and tracking servo control are performed to record and reproduce information on the signal recording surface (DL) of the recording disk, and non-signal of the recording disk. Visible information can be recorded by irradiating the recording surface (VL) with laser light. In the disk discrimination process, the recording disk is irradiated with laser light to perform the focus servo control and to keep the distance between the pickup objective lens (7) and the laser light receiving surface constant without performing the tracking servo control. When the pickup is moved in the radial direction of the recording disk while keeping it, a tracking error signal (TER) is generated, and when a track crossing is not detected within a predetermined time based on the tracking error signal, the laser light receiving surface of the recording disk Discriminant result signal (27) indicating that is other than the signal recording surface. Output from the host interface circuit (25). By using the tracking error signal, it is possible to accurately control the non-signal recording surface of the recording disk in a short time. Since the host interface circuit power discrimination result signal is output, the host device can perform appropriate processing on the discrimination result.
[0015] 具体的な一つの形態として、前記ディスク判別処理において前記記録ディスクのレ 一ザ光受光面が信号記録面以外であることを検出したとき、前記記録ディスクの非信 号記録面にレーザ光を照射して可視情報を記録する可視情報記録動作が可能にさ れる。 As a specific form, when it is detected in the disc discrimination process that the laser light receiving surface of the recording disc is other than the signal recording surface, a laser is applied to the non-signal recording surface of the recording disc. Visible information recording operation that records visible information by irradiating light is enabled.
[0016] 別の形態として、前記ディスク判別処理にぉ 、て、トラッキング誤差信号を 2値ィ匕し たパルス (TER— P)のパルス数が所定時間内に一定数以下であるとき、記録ディスク のレーザ光照射面が信号記録面以外であると判別する。トラッキング誤差信号を用 いた判定を容易化することができる。更に具体的な形態として、前記トラッキング誤差 信号を 2値ィ匕するヒステリシスコンパレータ (23)を更に有し、前記ディスク判別処理に おいて、ヒステリシスコンパレータから出力されるノ ルスを用いて前記判別を行う。単 なる 2値ィ匕に比べてノイズの影響を小さくすることができる。  [0016] As another form, when the number of pulses (TER-P) obtained by binarizing the tracking error signal is equal to or less than a predetermined number within a predetermined time during the disc discrimination process, It is determined that the laser beam irradiation surface is other than the signal recording surface. Judgment using the tracking error signal can be facilitated. As a more specific form, it further includes a hysteresis comparator (23) for binarizing the tracking error signal, and in the disc discrimination processing, the discrimination is performed using the noise output from the hysteresis comparator. . The effect of noise can be reduced compared to a simple binary key.
[0017] 更に別の形態として、前記ディスク判別処理において、トラッキング誤差信号の振 幅が所定時間内に一定レベル以下であるとき、記録ディスクのレーザ光照射面が信 号記録面以外であると判別する。 CPUがトラッキング誤差信号の AZD変換結果を 演算することによって判別を行うことが可能になる。  [0017] As yet another form, in the disc discriminating process, when the amplitude of the tracking error signal is below a certain level within a predetermined time, it is discriminated that the laser light irradiation surface of the recording disc is other than the signal recording surface. To do. The CPU can make a distinction by calculating the AZD conversion result of the tracking error signal.
[0018] 更に別の形態として、前記ディスク判別処理において、トラッキング誤差信号を 2値 化したノ ルスのパルス数が所定時間内に一定数以下で、且つ、トラッキング誤差信 号の振幅が所定時間内に一定レベル以下であるとき、記録ディスクのレーザ光照射 面が信号記録面以外であると判別する。判別結果に著しく高！ヽ信頼性を得ることが できる。  [0018] As yet another form, in the disc discrimination process, the number of pulses of the binarized tracking error signal is less than a certain number within a predetermined time, and the amplitude of the tracking error signal is within a predetermined time. Is below a certain level, it is determined that the laser light irradiation surface of the recording disk is other than the signal recording surface. Remarkably high in discrimination results!ヽ Reliability can be obtained.
[0019] 〔2〕更に詳しくは、ディスクドライブ装置は、装着された記録ディスクに対物レンズを 介してレーザ光を照射し、前記記録ディスク力 の反射光を光検出器 (8)で光電変 換し、第 1ァクチ ータ（9)により前記対物レンズをその焦点深度内に移動可能とす る光学的なピックアップと、前記ピックアップを前記記録ディスクの半径方向に移動す る第 2ァクチヱータ (11)と、前記光検出器の出力に基づ!/、てフォーカス誤差信号及び トラッキング誤差信号を生成するアンプ回路 (12)と、前記フォーカス誤差信号に基づ いて前記対物レンズと前記記録ディスクのレーザ光受光面との距離を一定に保つよ うに前記第 1ァクチ ータを制御するフォーカスサーボ制御回路 (15)と、前記トラツキ ング誤差信号に基づいて前記ピックアップを前記記録ディスクのトラックに追従させる ように前記第 2ァクチエータを制御するトラッキングサーボ回路 (16)と、データ処理回 路 (17)とを有し、装着された前記記録ディスクにレーザ光を照射してディスク判別処 理を行な 、、その判別結果に従って前記記録ディスクの信号記録面に情報の記録と 再生が可能である。前記データ処理回路は、ディスク判別処理において、レーザ光 を前記記録ディスクに照射し前記フォーカスサーボ制御回路によりピックアップのレン ズと前記記録ディスクのレーザ光受光面との距離を一定に保ちながら前記ピックアツ プを前記記録ディスクの半径方向に移動させ、それによつて形成されるトラッキング 誤差信号に基づいて所定時間内にトラック横断を検出しないとき、前記記録ディスク のレーザ光受光面が信号記録面以外であることを示す判別結果信号 (27)を生成す る。トラッキング誤差信号を用いることにより、記録ディスクの非信号記録面を短時間 で正確に区別する制御が可能になる。 [2] In more detail, the disk drive device irradiates the mounted recording disk with laser light via an objective lens, and photoelectrically converts the reflected light of the recording disk force with a photodetector (8). An optical pickup that enables the objective lens to be moved within the focal depth by the first character (9), and the pickup is moved in the radial direction of the recording disk. A second actuator (11), an amplifier circuit (12) for generating a focus error signal and a tracking error signal based on the output of the photodetector, and the objective lens based on the focus error signal. And a focus servo control circuit (15) for controlling the first character so as to keep the distance between the recording disk and the laser light receiving surface of the recording disk constant, and the pickup is connected to the recording disk based on the tracking error signal. A tracking servo circuit (16) for controlling the second actuator so as to follow the track of the track, and a data processing circuit (17). The disc discriminating process is performed by irradiating the mounted recording disc with laser light. As a result, information can be recorded and reproduced on the signal recording surface of the recording disk according to the determination result. In the disc discrimination process, the data processing circuit irradiates the recording disk with laser light, and the focus servo control circuit keeps the distance between the pickup lens and the laser light receiving surface of the recording disk constant. When the track crossing is not detected within a predetermined time based on the tracking error signal formed by moving the recording disk in the radial direction of the recording disk, the laser light receiving surface of the recording disk is other than the signal recording surface A discrimination result signal (27) is generated. By using the tracking error signal, it becomes possible to accurately control the non-signal recording surface of the recording disk in a short time.
〔3〕別の観点によれば、記録ディスクの定位置にレーザ光を照射するためのサーボ 制御と、記録ディスクの信号記録面に情報の記録と再生を行うための信号処理とに 用いられる半導体装置 (28)は、レーザ光が照射された記録ディスク力 の反射光の 光電変換信号に基づいてフォーカス誤差信号及びトラッキング誤差信号を生成する アンプ (12)と、前記フォーカス誤差信号に基づ 、て対物レンズと前記記録ディスクの レーザ光受光面との距離を一定に保っためのサーボ制御を行うフォーカスサーボ制 御回路 (15)と、前記対物レンズとレーザ光源を有する光学的なピックアップを前記トラ ッキング誤差信号に基づいて前記記録ディスクのトラックに追従させるサーボ制御を 行うトラッキングサーボ制御回路 (16)と、プログラムを実行する演算処理装置 (17)と、 前記プログラムを格納する不揮発性メモリ (22)と、を有する。前記演算処理装置は、 レーザ光を前記記録ディスクに照射し前記フォーカスサーボ制御回路によりピックァ ップのレンズと前記記録ディスクのレーザ光受光面との距離を一定に保ちながら前記 ピックアップを前記記録ディスクの半径方向に移動させ、それによつて形成されるトラ ッキング誤差信号に基づいて所定時間内にトラック横断を検出しないとき、前記記録 ディスクのレーザ光受光面が信号記録面以外であると判定し、この判定結果を得るこ とを条件に、前記記録ディスクの非信号記録面にレーザ光を照射して可視情報を記 録する可視情報記録動作を可能にする。トラッキング誤差信号を用いることにより、記 録ディスクの非信号記録面を短時間で正確に区別する制御が可能になる。 [3] According to another aspect, a semiconductor used for servo control for irradiating a fixed position of a recording disk with laser light and signal processing for recording and reproducing information on a signal recording surface of the recording disk The device (28) includes an amplifier (12) that generates a focus error signal and a tracking error signal based on the photoelectric conversion signal of the reflected light of the recording disk force irradiated with the laser beam, and based on the focus error signal. A focus servo control circuit (15) for performing servo control to keep the distance between the objective lens and the laser light receiving surface of the recording disk constant, and an optical pickup having the objective lens and a laser light source are tracked. A tracking servo control circuit (16) for performing servo control to follow the track of the recording disk based on the error signal, and an arithmetic process for executing the program And a non-volatile memory (22) for storing the program. The arithmetic processing unit irradiates the recording disk with laser light, and the focus servo control circuit maintains the distance between the pickup lens and the laser light receiving surface of the recording disk constant. When the pickup is moved in the radial direction of the recording disk and the track crossing is not detected within a predetermined time based on the tracking error signal formed thereby, the laser light receiving surface of the recording disk is other than the signal recording surface. On the condition that the determination result is obtained and this determination result is obtained, a visible information recording operation for recording visible information by irradiating the non-signal recording surface of the recording disk with laser light is enabled. By using the tracking error signal, it is possible to accurately control the non-signal recording surface of the recording disk in a short time.
[0021] 一つの具体的な形態として、前記アンプ、前記フォーカスサーボ制御回路、前記ト ラッキングサーボ制御回路、前記演算処理装置、及び前記不揮発性メモリを構成す るシングルチップ又はマルチチップを 1個のパッケージに封止して成る。  [0021] As one specific form, the amplifier, the focus servo control circuit, the tracking servo control circuit, the arithmetic processing device, and the single chip or multichip constituting the nonvolatile memory are provided as one piece. It is sealed in a package.
[0022] 2.実施の形態の説明  [0022] 2. Description of Embodiment
次に、実施の形態について更に詳述する。  Next, the embodiment will be described in more detail.
[0023] 《マルチディスクドライブ装置》  [0023] <Multi-disk drive device>
図 1には本発明に係るディスクドライブ装置の一例であるマルチディスクドライブ装 置 1の全体的な構成が示される。同図に示されるマルチディスクドライブ装置 1が再 生及び記録対象とする記録ディスク 2は CD— ROM、 CD-R/RW, DVD-ROM 、 DVD-R/RW, DVD+R/RW, DVD— RAM等とされ、更に、前記記録ディス ク 2のデータ記録面の裏面に設けられたレーザ感光性の塗料から成る描画記録面に レーザ光を照射して可視像を描画するレーザラベル印刷機能を備える。同図に示さ れるマルチディスクドライブ 1はディスクモータ（DM) 3で回転される記録ディスク 2に レーザ光を照射する光学的なピックアップ (光ピックアップ) 4を備える。光ピックアップ 4は、レーザ光源 5、ビームスプリッタ 6、対物レンズ 7 (集光レンズとも称する）、及び光 検出器 8等力 なる光学系と、対物レンズ 7を変位させる機械系のフォーカスァクチェ ータ（FCA) 9及びトラッキングァクチエータ (TRA)10とより構成される。フォーカスァ クチエータ 9は弹性的に支持されて 、る対物レンズ 5を記録ディスクの厚さ方向に移 動可能とする。トラッキングァクチエータ 10は弹性的に支持されている対物レンズ 5を 記録ディスク 2の半径方向（情報トラックの横断方向）へ移動可能とする。ピックアップ 4それ自体はスレッドァクチエータ（THA) 11により記録ディスク 2の半径方向に沿つ て往復移動可能になって 、る。 [0024] 前記光ピックアップ 4内のレーザ光源 5は、図示しないレーザダイオード、レーザダ ィオードを発光させるための駆動回路、及びレーザダイオードより出射される発散性 のレーザ光を平行光に直すための図示しないコリメートレンズ等を有し、平行なレー ザ光を出射する。レーザ光は、前記ビームスプリッタ 6により光路が曲げられて、対物 レンズ 7に入射する。対物レンズ 7は、記録ディスク 2のデータ記録面または描画記録 面にレーザ光の光束を収束させる。 FIG. 1 shows an overall configuration of a multi-disk drive device 1 which is an example of a disk drive device according to the present invention. The recording disk 2 to be played and recorded by the multi-disc drive 1 shown in the figure is CD-ROM, CD-R / RW, DVD-ROM, DVD-R / RW, DVD + R / RW, DVD— A laser label printing function for drawing a visible image by irradiating a laser beam onto a drawing recording surface made of a laser-sensitive paint provided on the back surface of the data recording surface of the recording disk 2 Prepare. The multi-disk drive 1 shown in the figure includes an optical pickup (optical pickup) 4 that irradiates a recording disk 2 rotated by a disk motor (DM) 3 with laser light. The optical pickup 4 includes a laser light source 5, a beam splitter 6, an objective lens 7 (also referred to as a condensing lens), and an optical system having an isotropic force, and a mechanical focus checker for displacing the objective lens 7. (FCA) 9 and tracking actuator (TRA) 10. The focus actuator 9 is supported in an inertial manner so that the objective lens 5 can be moved in the thickness direction of the recording disk. The tracking actuator 10 enables the objective lens 5 that is supported by inertia to move in the radial direction of the recording disk 2 (in the transverse direction of the information track). The pickup 4 itself can be reciprocated along the radial direction of the recording disk 2 by a thread actuator (THA) 11. [0024] A laser light source 5 in the optical pickup 4 includes a laser diode (not shown), a drive circuit for emitting a laser diode, and a not-shown for converting the divergent laser light emitted from the laser diode into parallel light. It has a collimating lens and emits parallel laser light. The laser beam is incident on the objective lens 7 with its optical path bent by the beam splitter 6. The objective lens 7 converges the light beam of the laser beam on the data recording surface or drawing / recording surface of the recording disk 2.
[0025] 記録ディスク 2で反射された光は、対物レンズ 7及びビームスプリッタ 6を経て光検出 器 8に入射する。光検出器 8は、記録ディスク 1上からの反射光の強度変化を受光し 、光電変換した信号を高周波アンプ (RFA)12に供給する。高周波アンプ 12は、光検 出器 8の出力信号を電流電圧変換した後、加減算処理し、対物レンズ 5と情報トラッ クとのずれ量に応じて信号レベルと極性が変化するトラッキング誤差信号 TERを生 成する。更に前記高周波アンプ 12は、光検出器 8の出力信号から、レーザビームの デフォーカス量 (焦点からのずれ量）に応じて信号レベルが変化されるフォーカス誤 差信号 FERと、戻り光の偏波面の変化に応じて信号レベルが変化するデータ再生 信号 (EFM信号) RFを生成する。  The light reflected by the recording disk 2 enters the photodetector 8 via the objective lens 7 and the beam splitter 6. The photodetector 8 receives a change in intensity of the reflected light from the recording disk 1 and supplies a photoelectrically converted signal to a high frequency amplifier (RFA) 12. The high-frequency amplifier 12 converts the output signal of the optical detector 8 from current to voltage, then adds and subtracts it, and generates a tracking error signal TER whose signal level and polarity change according to the amount of deviation between the objective lens 5 and the information track. Generate. Further, the high-frequency amplifier 12 includes a focus error signal FER whose signal level is changed according to the defocus amount (deviation amount from the focus) of the laser beam from the output signal of the photodetector 8, and the polarization plane of the return light. Generates a data playback signal (EFM signal) RF that changes its signal level in response to changes in.
[0026] 前記トラッキング誤差信号 TER及びフォーカス誤差信号 FERは記録ディスク 2の半 径方向に対するピックアップ 4の位置制御とピックアップ 4に対する対物レンズ 7の位 置制御に用いられる。位置制御はサーボ制御又はプログラム制御とされる。サーボ制 御はフォーカスサーボ制御回路 (FCNT) 15及びトラッキングサーボ制御回路 (TCN T) 16を用いる。プログラム制御はマイクロコントローラ (SCNT) 17を用いる。セレクタ 1 8, 19, 20は選択的にサーブループを形成する。マイクロコントローラ 17がセレクタ 1 8にフォーカスサーボ制御回路 15の出力をフォーカスァクチエータ 5に供給させること により、光検出器 8、 RFA12、 FER、 FCNT15、 FCA9を含むフォーカスサーボル ープが形成され、対物レンズ 7が焦点深度内に位置するように FCA9が駆動される。 一方、マイクロコントローラ 17がセレクタ 19, 20にトラッキングサーボ制御回路 16の 出力をトラッキングァクチエータ 10およびスレッドァクチエータ 11に供給させることに より、光検出器 8、 RFA12、 TER、 TCNT16、 TRA10、 THAI 1を含むトラッキング サーボループが形成され、対物レンズがデータ記録面の情報トラックに追従するよう に TRA10及び THA11が駆動される。マイクロコントローラ 17はフラッシュメモリ（FL ASH) 22に格納されたプログラムを読み込んで順次実行することによりディスクドライ ブ装置 1の動作を全体的に制御する。位置制御をプログラム制御で行う場合には、マ イク口コントローラ 17はセレクタ 18, 19, 20にマイクロコントローラ 17が出力する駆動 信号を選択させる。マイクロコントローラ 17は対物レンズ 7を記録ディスク 2の表裏方 向に移動させながらフォーカス誤差信号 FERを参照することによりデータ記録面又 は描画記録面に焦点深度の範囲内で対物レンズの焦点が合う位置を検出したりする ことができる。また、マイクロコントローラ 17は対物レンズ 7を記録ディスク 2の半径方 向に移動させながらトラッキング誤差信号 TERに基づいて情報トラックの横断を検出 することができる。特に図 1においてトラッキング誤差信号 TERはパルス発生回路 (P LS) 23で 2値化されたトラキング誤差パルス TER—Pとしてマイクロコントローラ 17に 供給される。 The tracking error signal TER and the focus error signal FER are used for position control of the pickup 4 with respect to the radial direction of the recording disk 2 and position control of the objective lens 7 with respect to the pickup 4. The position control is servo control or program control. Servo control uses focus servo control circuit (FCNT) 15 and tracking servo control circuit (TCN T) 16. Microcontroller (SCNT) 17 is used for program control. The selectors 1, 8, 19, 20 selectively form a serve loop. When the microcontroller 17 causes the selector 1 8 to supply the output of the focus servo control circuit 15 to the focus actuator 5, a focus servo loop including the photodetectors 8, RFA12, FER, FCNT15, and FCA9 is formed. The FCA 9 is driven so that the objective lens 7 is positioned within the depth of focus. On the other hand, the microcontroller 17 causes the selectors 19 and 20 to supply the output of the tracking servo control circuit 16 to the tracking actuator 10 and the thread actuator 11 so that the photodetectors 8, RFA12, TER, TCNT16, TRA10, A tracking servo loop including THAI 1 is formed so that the objective lens follows the information track on the data recording surface. TRA10 and THA11 are driven. The microcontroller 17 controls the overall operation of the disk drive device 1 by reading the program stored in the flash memory (FL ASH) 22 and sequentially executing the program. When performing position control by program control, the microphone port controller 17 causes the selectors 18, 19, and 20 to select the drive signal output from the microcontroller 17. The microcontroller 17 refers to the focus error signal FER while moving the objective lens 7 in the front / back direction of the recording disk 2 so that the objective lens is focused on the data recording surface or the drawing recording surface within the depth of focus range. Can be detected. The microcontroller 17 can detect the crossing of the information track based on the tracking error signal TER while moving the objective lens 7 in the radial direction of the recording disk 2. In particular, in FIG. 1, the tracking error signal TER is supplied to the microcontroller 17 as a tracking error pulse TER-P binarized by a pulse generation circuit (PLS) 23.
データ再生信号 RFは信号処理'再生回路 (SIG) 24に供給され、ディジタル信号 処理によって 2値ィヒ並びにフィルタリング処理が施されると共に復号化、エラー訂正、 フォーマット変換などが行なわれて、記録ディスク 2に記録されて 、るデータが再生さ れる。再生されたデータは、マイクロコントローラ 17からホストインタフェース（HIS) 25 を経て、パーソナルコンピュータやワークステーションなどのホスト装置（HST) 26に 与えられる。ホスト装置 34はディスクドライブ装置に動作コマンドや制御データを与え て、マイクロコントローラ 1にマルチディスクドライブ装置 1の動作を指示する。マルチ ディスクドライブ装置 1の基本的な動作は、装着された記録ディスクの種類を判別す るディスク判別動作、種類が判別された記録ディスクのデータ記録面に対するデータ 記録動作、種類が判別された記録ディスクのデータ記録面力 データを読み出すデ ータ再生動作、記録ディスクの描画記録面に対するレーザラベル印刷動作である。 判別動作の詳細は後述するが、基本的にはレーザ光が照射された記録ディスク 2か らの反射光量の大きさ、さらにピックアップの対物レンズを上下方向に移動させるフォ 一カスサーチ動作においてディスク表面からの反射光が得られて力 データ記録面 からの反射光が得られるまでの計測時間を基に、ディスクの種類を判別する。記録動 作及び再生動作においてはフォーカスサーボ及びトラッキングサーボによる位置制 御を行いながら、記録情報の読み取りや書き込みを行う。レーザラベル印刷動作で は、フォーカスサーボを行って描画記録面に焦点深度の範囲内で対物レンズ 7の焦 点を合わせながら、マイクロコントローラ 17がプログラム制御によって対物レンズ 7を 描画記録面の最内周力 最外周に向けて逐次微小刻みで移動させ、これに同期し て描画データに従ってレーザ光源を点灯若しくは発光強度を制御する。 The data reproduction signal RF is supplied to a signal processing / reproduction circuit (SIG) 24, subjected to binary signal filtering and filtering by digital signal processing, and subjected to decoding, error correction, format conversion, etc. The data recorded in 2 is played back. The reproduced data is given from a microcontroller 17 to a host device (HST) 26 such as a personal computer or workstation via a host interface (HIS) 25. The host device 34 gives operation commands and control data to the disk drive device and instructs the microcontroller 1 to operate the multi-disk drive device 1. The basic operations of the multi-disk drive unit 1 are disc discriminating operation for discriminating the type of the recording disc loaded, data recording operation for the data recording surface of the disc for which the disc type is discriminated, and recording disc for which the disc type has been discriminated. This is the data reproduction operation for reading the data and the laser label printing operation for the drawing and recording surface of the recording disk. The details of the discrimination operation will be described later. Basically, the amount of reflected light from the recording disk 2 irradiated with laser light, and the focus search operation in which the pickup objective lens is moved in the vertical direction from the surface of the disk. The disc type is discriminated based on the measurement time until the reflected light from the force data recording surface is obtained. Positioning by focus servo and tracking servo is used in recording and playback operations. Read and write recorded information. In the laser label printing operation, while the focus servo is performed and the objective lens 7 is focused on the drawing recording surface within the range of the focal depth, the microcontroller 17 controls the objective lens 7 by program control to the innermost circumference of the drawing recording surface. Force Move toward the outermost circumference in small increments, and in synchronization with this, turn on the laser light source or control the emission intensity according to the drawing data.
[0028] 図 2には光検出器及び高周波アンプの詳細な一例が示される。特に図 2はディスク 判別動作において機能される回路構成に着目している。光検出器 8は反射光の光ス ポットを 4個のフォトダイオード A, B, C, Dで 4分割して検出する。フォトダイオード A , B, C, Dからの光電変換信号はバッファ 31— A, 31— B, 31— C, 31— Dを介して 高周波アンプ 12に供給される。  FIG. 2 shows a detailed example of the photodetector and the high frequency amplifier. In particular, Fig. 2 focuses on the circuit configuration that functions in the disc discrimination operation. The photodetector 8 detects the reflected light spot by dividing it into four photodiodes A, B, C, and D. Photoelectric conversion signals from the photodiodes A, B, C, and D are supplied to the high-frequency amplifier 12 through the buffers 31-A, 31-B, 31-C, and 31-D.
[0029] 電流加算回路 37は全てのフォトダイオード A〜Cに関する電流信号を加算してデ ータ再生信号 RFを生成する。データ再生信号 RFは AZD器 38でアナログ信号から ディジタル信号に変換されて SIG24に供給される。  [0029] The current adding circuit 37 adds the current signals for all the photodiodes A to C to generate the data reproduction signal RF. The data reproduction signal RF is converted from an analog signal to a digital signal by the AZD unit 38 and supplied to the SIG 24.
[0030] 対角配置されたフォトダイオード Aと Cに関する電流信号は電流加算回路 32— AC で加算されて電圧信号に変換される。同様に対角配置されたフォトダイオード Bと D に関する電流信号は電流加算回路 32— BDで加算されて電圧信号に変換される。 電流加算回路 32— AC, 32— BDの出力電圧は減算回路 33で減算されてフォー力 ス誤差信号 FERにされる。フォーカス誤差信号 FERは AZD変 34でアナログ信 号力もディジタル信号に変換されて FCNT15等に供給される。ピックアップ 3の対物 レンズ 7が焦点深度に合っている場合にはその光学系の作用によりメインスポットは 各フォトダイオード A〜Dに均一に集光する円形とされるようになって 、る。近すぎる 場合にはその光学系の作用によりメインスポットはフォトダイオード A, C側に集光す る楕円形状とされるようになつている。遠すぎる場合にはその光学系の作用によりフォ トダイオード B, D側に集光する楕円形状とされるようになつている。したがって、焦点 深度に合っているとき減算回路 33の出力はゼロにされ、その前後で極性の異なる値 を採る。要するに、フォーカス誤差信号 FERは焦点位置からのずれ量に応じた振幅 とずれ方向に応じた極性を有する。フォーカスサーボ制御ではフォーカス誤差信号 F ERがゼロになるようにフォーカスァクチエータ 9が動作される。 FCNT15の出力は D ZA変 39によってディジタル信号カゝらアナログ信号に変換されて FCA9に供給 される。 [0030] The current signals related to the photodiodes A and C arranged diagonally are added by the current adding circuit 32—AC and converted into a voltage signal. Similarly, the current signals related to the photodiodes B and D arranged diagonally are added by the current adding circuit 32-BD and converted into a voltage signal. The output voltage of the current adder circuit 32—AC, 32—BD is subtracted by the subtractor circuit 33 to obtain the force error signal FER. The focus error signal FER is converted to a digital signal by the AZD converter 34 and supplied to the FCNT 15 and the like. When the objective lens 7 of the pickup 3 matches the depth of focus, the main spot is formed into a circular shape that uniformly converges on each photodiode A to D by the action of the optical system. If it is too close, the main spot is shaped like an ellipse condensing on the photodiodes A and C side due to the action of the optical system. When the distance is too far, the optical system has an elliptical shape condensing on the photodiodes B and D side. Therefore, when the depth of focus is met, the output of the subtraction circuit 33 is set to zero, and takes values with different polarities before and after that. In short, the focus error signal FER has an amplitude corresponding to the shift amount from the focal position and a polarity corresponding to the shift direction. In the focus servo control, the focus actuator 9 is operated so that the focus error signal F ER becomes zero. The output of FCNT15 is D The digital signal is converted into an analog signal by ZA conversion 39 and supplied to FCA9.
[0031] 光スポットの左側に配置されたフォトダイオード Αと Dに関する電流信号は電流加算 回路 32— ADで加算されて電圧信号に変換される。同様に、光スポットの右側に配 置されたフォトダイオード Bと Cに関する電流信号は電流加算回路 32— BCで加算さ れて電圧信号に変換される。電流加算回路 32— AD, 32— BCの出力電圧は減算 回路 35で減算されてトラッキング誤差信号 TERにされる。光スポットが情報トラックに 追従して 、るとき、情報トラックに対する分割スポットの食 、込みは左右で等 U、が、 情報トラックに対して光スポットが右に偏倚すれば、その食い込み量も左右で相違す る。したがって、減算回路 34の出力は情報トラックに対して光スポットが左右対称位 置であればゼロにされ、左右への偏倚量に応じて振幅が変化し、左右でその振幅の 極性が相違される。トラッキングサーボ制御ではトラッキング誤差信号 TERがゼロに なるようにトラッキングァクチエータ 10が動作される。トラッキング誤差信号 TERを受 けるパルス発生回路 23は例えばヒステリシスコンパレータカも成る。図 3に例示される ように、トラッキングサーボを非活性にしてフォーカスサーボをかけながら、プログラム 制御によってピックアップにデータ記録面の情報トラックを横断させたとき、サイン波 形に近似されるようなトラッキング誤差信号 TERが形成される。ヒステリシスコンパレ ータ 23のハイレベル側の閾値レベルは VTH、ローレベル側の閾値レベルは VTLで あり、トラッキング誤差パルス TRER— Pは実質的に TZC (トラッキング ·ゼロ ·クロス） 信号になる。例えば再生トラックを切換えるようなとき、マイクロコントローラ 17はスレツ ドアクチエータ 11を使つてピックアップを光ディスクの半径方向に動作させるとき、トラ ッキング誤差パルス TRER—Pのクロック数を計数することによって横断トラック数を把 握することができる。マルチディスクドライブ装置 1において、ディスク判別動作におい てもトラッキング誤差パルス TRER—Pを利用する。以下、ディスク判別のための制御 について詳述する。  [0031] The current signals related to the photodiodes D and D arranged on the left side of the light spot are added by the current addition circuit 32-AD and converted into a voltage signal. Similarly, the current signals related to the photodiodes B and C arranged on the right side of the light spot are added by the current adding circuit 32-BC and converted into a voltage signal. The output voltage of the current adder circuit 32—AD, 32—BC is subtracted by the subtractor circuit 35 and used as the tracking error signal TER. When the light spot follows the information track, the divergence of the divided spot with respect to the information track is left and right, etc.U, but if the light spot is biased to the right with respect to the information track, the amount of penetration will also be left and right. No. Therefore, the output of the subtracting circuit 34 is set to zero if the light spot is symmetrical with respect to the information track, the amplitude changes according to the amount of deviation to the left and right, and the polarity of the amplitude differs between the left and right. . In tracking servo control, the tracking actuator 10 is operated so that the tracking error signal TER becomes zero. The pulse generation circuit 23 that receives the tracking error signal TER includes, for example, a hysteresis comparator. As shown in Fig. 3, when the tracking servo is deactivated and the focus servo is applied, the tracking error that approximates a sine waveform when the pickup is crossed the information track on the data recording surface by program control. Signal TER is formed. The threshold level on the high level side of hysteresis comparator 23 is VTH, the threshold level on the low level side is VTL, and the tracking error pulse TRER—P is essentially a TZC (tracking zero cross) signal. For example, when switching the playback track, the microcontroller 17 uses the thread actuator 11 to move the pickup in the radial direction of the optical disk, and thereby counts the number of crossing tracks by counting the number of clocks of the tracking error pulse TRER-P. Can be gripped. In the multi-disk drive unit 1, the tracking error pulse TRER-P is also used in the disk discrimination operation. The control for disc discrimination is described in detail below.
[0032] 《ディスク判別制御》  [0032] <Disk discrimination control>
図 4には DVD系の記録ディスク（DVDディスク）の基本構造が例示され、図 5には CD系の記録ディスク（CDディスク）の基本構造が例示される。ここではデータ記録面 と描画記録面を有する場合について説明する。 FFは記録ディスクの表面、 BFは記 録ディスクの裏面、 DLはデータ記録面、 VLは描画記録面を意味する。 DVDデイス ク、 CDディスクは共にディスクの厚さは 1. 2mmと規格化されている。ディスク表面 F Fからデータ記録面 DLまでの距離についても、 DVDディスクは 0. 6mm、 CDデイス クは 1. 1mmと規格化されている。裏面 BF力 描画記録面 VLまでの距離について 規格は一般には公開されていないが、 DVDディスクの場合には表面 FFカゝらデータ 記録面 DLまでの距離と大差は無 、。その距離の相違によってデータ記録面 DLがピ ックアップ 4に面している力、描画記録面 VLがピックアップ 4に面しているのかを区別 するのは難しい。 CDディスクのように大差があれば距離の差で区別することができる FIG. 4 illustrates the basic structure of a DVD recording disk (DVD disk), and FIG. 5 illustrates the basic structure of a CD recording disk (CD disk). Here is the data recording surface A case where a drawing recording surface is provided will be described. FF is the front surface of the recording disk, BF is the back surface of the recording disk, DL is the data recording surface, and VL is the drawing recording surface. Both DVD discs and CD discs have a standardized thickness of 1.2 mm. The distance from the disc surface FF to the data recording surface DL is also standardized as 0.6 mm for DVD discs and 1.1 mm for CD discs. Back side BF force Drawing recording surface Distance to VL The standard is not publicly disclosed, but in the case of DVD disc, there is no big difference from the distance from the front FF to the data recording surface DL. It is difficult to distinguish whether the data recording surface DL faces the pickup 4 and the drawing recording surface VL faces the pickup 4 due to the difference in distance. If there is a big difference like a CD disc, it can be distinguished by the difference in distance.
[0033] 記録ディスクの表面反射率及びデータ記録面の反射率は、 DVD— ROM、 DVD 士 Rと、それ以外の記録ディスクの間で大きく相違される。それ以外の記録ディスクの 間では、 DVD士 RWは他の記録ディスクと反射率の相違が大きぐ DVD— RAMは 他の記録ディスクとディスク管理領域が相違し、 CD系ディディスクとの間には図 4及 び図 5で説明した規格上の相違がある。ディスク判別処理では、反射率の相違、ディ スク管理領域の相違、そして規格の相違に則ってディスクの種別を判定する。 The surface reflectance of the recording disk and the reflectance of the data recording surface are greatly different between DVD-ROM and DVD player R and other recording disks. Among other recording discs, DVD Player RW has a large difference in reflectance from other recording discs. DVD-RAM has a disc management area different from other recording discs, and between CD discs. There are differences in the standards described in Fig. 4 and Fig. 5. In the disc discrimination process, the disc type is discriminated in accordance with the difference in reflectance, disc management area, and standard.
[0034] 図 6にはフォーカスサーチを利用したデイス判別の原理が例示される。フォーカスサ ーチは、フォーカスサーボをかけずにプログラム制御によって対物レンズ 7を記録ディ スク 2の平面に徐々に近づけていくと、その途中で表面 FF (裏面 BF)に焦点を結び、 その後に、データ記録面 DL (描画記録面 VL)に焦点を結ぶ。焦点を結ぶと反射光 量が増えるので、信号 RFに基づいて反射光量のレベルを計測することによって焦点 を結んだ位置とその位置での反射レベルを取得することができる。最初の検出時刻と 次の検出時刻との差に基づ 、て表面 FF (裏面 BF)とデータ記録面 DL (描画記録面 VL)との距離を判別することができる。波形 Waは DVDディスクの表面 FFからレーザ 光を照射してフォーカスサーチを行った時の反射光量の波形であり、波形 Wdは CD ディスクの表面 FFからレーザ光を照射してフォーカスサーチを行った時の反射光量 の波形である。図 4と図 5で説明した規格の相違から明らかなように DVDディスクと C Dディスクの間では表面 FF力 データ記録面 DLまでの距離の差が大きいので判定 閾値時間 Tth—Hによって夫々の計測時間 Taと Tdの相違を区別することができる。 これに対し、 Wbは DVDディスクの裏面 BFからレーザ光を照射してフォーカスサーチ を行った時の反射光量の波形であり、 DVDディスクにお!/、て表面 FFからデータ記録 面 DLまでの距離と裏面 BF力 描画記録面 VLまでの距離との差は小さいので計測 時間 Taと Tbの差は殆ど無ぐそれだけで両者を区別することは難しい。特に波形 W bのように高感光度の描画記録面 VLは DVD士 RWのデータ記録面 DLと実質的に 同じ反射率になるので、 DVD士 RWにおいては反射光量の差を考慮してもデータ記 録面 DLと描画記録面 VBとを区別することが難 、。波形 Wcのように低感光度の描 画記録面 VLの場合には、データ記録面 DLよりも反射率が低いので、反射光量に差 を生ずるので、 DVD士 RWディスクであってもそれによつてデータ記録面 DLと描画 記録面 VLを識別することが可能である。 DVDディスクの中には DVD—ROM、 DV D±R、 DVD士 RW、 DVD— RAMがあるが、 DVD— ROM、 DVD士 Rは DVD士 R W、 DVD— RAMに比べて表面反射率はもとよりデータ記録面の反射率が 3乃至 4 倍高いので、反射光量の差によって相互の区別がつく。し力も、描画記録面の反射 率はそのデータ記録面の反射率よりも小さいから、 DVD-ROM, DVD士 Rのデー タ記録面と描画記録面との区別もつく。特に問題となるには、 DVD士 RWのデータ 記録面の反射率と近似する高感光度の描画記録面 VLの反射率である。その他の D VD系ディスクについては反射光量のレベル差も考慮することによってデータ記録面 DLと描画記録面 VLとの区別がつく。波形 Weは CDディスクの裏面 BFからレーザ光 を照射してフォーカスサーチを行った時の反射光量の波形であり、その計測時間 Te も極めて短いので、判定閾値時間 Tth—Lを用いることによって、 CDディスクのデー タ記録面 DLはもとより DVDディスクのデータ記録面 DL及び描画記録面 VLとも容易 に区別がつく。 FIG. 6 illustrates the principle of discriminating using focus search. When the objective lens 7 is gradually brought closer to the plane of the recording disk 2 by program control without applying focus servo, the focus search focuses on the front surface FF (rear surface BF), and then Focus on data recording surface DL (drawing recording surface VL). Since the amount of reflected light increases when focused, the position at which the focus is focused and the reflection level at that position can be obtained by measuring the level of the amount of reflected light based on the signal RF. Based on the difference between the first detection time and the next detection time, the distance between the front surface FF (back surface BF) and the data recording surface DL (drawing recording surface VL) can be determined. Waveform Wa is the waveform of the amount of reflected light when focus search is performed by irradiating laser light from the surface FF of the DVD disk. Waveform Wd is when focus search is performed by irradiating laser light from the surface FF of the CD disk. This is the waveform of the amount of reflected light. As is clear from the differences in the standards explained in Fig. 4 and Fig. 5, the difference between the surface FF force and the data recording surface DL is large between DVD discs and CD discs. The difference between the measurement times Ta and Td can be distinguished by the threshold time Tth-H. On the other hand, Wb is the waveform of the amount of reflected light when the focus search is performed by irradiating the laser beam from the back surface BF of the DVD disc. The distance from the front FF to the data recording surface DL on the DVD disc! Since the difference between the distance to the drawing recording surface VL is small, there is almost no difference between the measurement time Ta and Tb, and it is difficult to distinguish between them. In particular, the recording / recording surface VL with high photosensitivity like the waveform Wb has substantially the same reflectivity as the data recording surface DL of the DVD player RW. It is difficult to distinguish between the recording surface DL and the drawing recording surface VB. In the case of the image recording surface VL with a low photosensitivity like the waveform Wc, the reflectivity is lower than that of the data recording surface DL, so there is a difference in the amount of reflected light. It is possible to identify the data recording surface DL and the drawing recording surface VL. Some DVD discs include DVD-ROM, DV D ± R, DVD player RW, and DVD-RAM, but DVD-ROM and DVD player R have more data than surface reflectivity compared to DVD player RW and DVD-RAM. Since the reflectance of the recording surface is 3 to 4 times higher, it can be distinguished from each other by the difference in the amount of reflected light. However, since the reflectivity of the drawing recording surface is smaller than that of the data recording surface, it is possible to distinguish the data recording surface of the DVD-ROM and DVD player R from the drawing recording surface. Of particular concern is the reflectivity of the drawing / recording surface VL with high photosensitivity that approximates the reflectivity of the data recording surface of DVD RW. For other DVD discs, the data recording surface DL can be distinguished from the drawing recording surface VL by taking into account the level difference in the amount of reflected light. Waveform We is the waveform of the amount of reflected light when focus search is performed by irradiating the laser beam from the back surface BF of the CD disc. Since the measurement time Te is very short, the judgment threshold time Tth-L can be used. The data recording surface DL of the disc as well as the data recording surface DL and the drawing recording surface VL of the DVD disc can be easily distinguished.
上記フォーカスサーチでは区別がつき難い高感光度の描画記録面 VLと DVD士 R Wディスクのデータ記録面 DLとの区別を可能にするのに前記トラッキング誤差信号 TERを用いる。即ち、図 7に例示されるように描画記録面 VLには情報トラックが存在 しないので、トラッキング誤差信号 TERには図 3のような周期信号成分が発生せず、 ノイズ成分によって僅かに変動するだけである。ヒステリシスコンパレータ 23のハイレ ベル側の閾値レベル VTHとローレベル側の閾値レベル VTLとの間にノイズ成分の 振幅が入れば、トラッキング誤差パルス TER—P (TZC)はローレベルに固定される。 マイクロコントローラ 17はフォーカスサーボを掛けた状態でピックアップ 4を記録ディス ク 2の半径方向に移動させながらトラッキング誤差パルス TER—Pカゝら所定時間内に 得られるパルス数が所定値に達して 、なければデータ記録面ではな 、と判定する。 これによつて、ディスク判別処理では上記フォーカスサーチと共にトラキング誤差パル ス TER— Pによる判定を併用することによって高感光度の描画記録面 VLと DVD士 RWディスクのデータ記録面 DLとにつ 、ても区別することができる。 The tracking error signal TER is used to enable the distinction between the high-sensitivity drawing / recording surface VL and the data recording surface DL of the DVD RW disc, which are difficult to distinguish in the focus search. That is, as shown in FIG. 7, since there is no information track on the drawing / recording surface VL, the periodic signal component as shown in FIG. 3 does not occur in the tracking error signal TER, and it fluctuates slightly depending on the noise component. It is. High level of hysteresis comparator 23 If the amplitude of the noise component is between the threshold level VTH on the bell side and the threshold level VTL on the low level side, the tracking error pulse TER—P (TZC) is fixed at the low level. The microcontroller 17 moves the pickup 4 in the radial direction of the recording disk 2 with the focus servo applied, and the number of pulses obtained within a predetermined time such as the tracking error pulse TER-P must reach a predetermined value. In other words, it is determined that the data is not recorded. As a result, the disc discrimination process uses both the focus search and the determination based on the tracking error pulse TER-P, so that the high-sensitivity drawing / recording surface VL and the data recording surface DL of the DVD RW disc can be used. Can also be distinguished.
図 8にはマイクロコントローラ 17の制御によるディスク判別処理フローが例示される。 マイクロコントローラ 17は記録ディスク 2が挿入されるとディスク判別処理を開始する。 先ず、 DVD用レーザを発光させて (Sl)、フォーカスサーチを開始する (S 2)。フォー カスサーチでは、前述の通り、装着された記録ディスク 2の表面 FF (裏面 BF)とデー タ記録面 DL (描画記録面 VL)で増大する反射光量の増大地点間の時間計測と、反 射光のレベル検出を行う (S3)。反射光のレベル検出もフォーカスサーチ動作中に行 う。ステップ S3の検出結果に基づいてディスク判定処理を行なう（S4)。 CD系デイス クか DVD系ディスクかについては図 4、図 5の規格の相違力も識別でき、 CD系ディ スクのデータ記録面 DLであることは、フォーカスサーチを行った時の表面 FF (裏面 B F)とデータ記録面 DL (描画記録面 VL)の計測時間によって識別することができる。 DVD-ROM, DVD士 Rのデータ記録面 DLであることは、その反射光レベルによつ て識別することができ、 DVD— RAMディスクのデータ記録面 DLであることについて も他メディアとデータ管理領域が異なるため、識別することができる。前述の如く DV D士 RWディスクについてはデータ記録面 DLであるのか否かを反射光レベルで識別 することはできな 、。 DVD士 RWディスクにお!/、てデータ記録面 DLの反射率と高感 光度の描画記録面 VLの反射率に大きな差がな 、からである。 RST1では装着され た記録ディスクが DVD— ROM、 DVD±R、 DVD -RAM, CD-ROM, CD-R, 又は CD— RWの内の何れかのデータ記録面 DLであると言う結果を得る。その結果 はホスト装置に通知される（S5)。 RST2では DVD士 RW又は何れかの記録ディスク 2における描画記録面 VLであると 、う結果を得る。判定処理結果が RST2の場合に は、その次に、トラッキングサーボ制御が行われていないことを確認し (S6)、フォー力 スサーボ制御を行 、ながらピックアップ 4を記録ディスク 2の半径方向に移動させなが らトラッキング誤差パルス TER_Pを一定期間参照する (S7)。一定期間とは、少なく とも複数の情報トラックを横断可能な時間であることを要し、例えば 30msecである。 参照とは、例えばトラッキング誤差パルス TER—Pのパルス数を計数することである。 その計数結果に対して、トラック横断があつたかを判定する (S8)。例えば、その計数 値がその計測時間に横断可能なトラック数 nよりも少な 、数 m (0< m< < n)以下で あればトラック横断がな 、と判定する。トラック横断があれば DVD士 RWのデータ記 録面 DLであると判定し (S9)、その判定結果をホスト装置に通知する（S 10)。トラック 横断がなければ何れかの記録ディスクの描画記録面であると判定し (S11)、その判 定結果をホスト装置に通知する（S12)。この通知は図 1のホストインタフェース 25介し て判別結果信号 27としてホスト装置 26に与えられる。このとき、ホスト装置 26がレー ザラベル印刷支援プログラムを実行して 、るときはその判別結果信号 27に応答して マイクロコントローラ 17にレーザラベル印刷を指示し、これによつて、マイクロコント口 ーラ 17は、前記記録ディスク 2の描画記録面 VLにレーザ光を照射して可視情報を 記録する制御を開始する。また、そのとき、ホスト装置 26が記録データの再生若しく はデータ記録動作の支援プログラムを実行しているときはその判別結果信号 27に応 答してエラー表示を行う。 FIG. 8 illustrates a disk discrimination process flow under the control of the microcontroller 17. The microcontroller 17 starts disc discrimination processing when the recording disc 2 is inserted. First, a DVD laser is emitted (Sl), and a focus search is started (S2). In the focus search, as described above, the time between the increase in the amount of reflected light that increases on the front surface FF (back surface BF) and the data recording surface DL (drawing recording surface VL) of the loaded recording disk 2 and the reflected light are measured. Level detection is performed (S3). The reflected light level is also detected during the focus search operation. Based on the detection result of step S3, disc determination processing is performed (S4). The disc discrepancy between the discs in Fig. 4 and Fig. 5 can be identified for CD discs or DVD discs. The data recording surface DL of CD discs indicates that the front side FF (back side BF) when the focus search is performed. ) And data recording surface DL (drawing recording surface VL). The data recording surface DL of a DVD-ROM or DVD player R can be identified by its reflected light level. The data recording surface DL of a DVD-RAM disk is also managed with other media. Because the areas are different, they can be identified. As mentioned above, it is not possible to identify whether the DV D player RW disc is the data recording surface DL by the reflected light level. This is because there is no big difference between the reflectance of the data recording surface DL and the reflectance of the high-sensitivity drawing / recording surface VL on the DVD RW disc! In RST1, the result is that the recording disk loaded is one of the data recording surfaces DL of DVD-ROM, DVD ± R, DVD-RAM, CD-ROM, CD-R, or CD-RW. The result is notified to the host device (S5). In RST2, the result is obtained when the drawing recording surface VL is on the DVD player RW or any recording disk 2. When the judgment processing result is RST2 Next, confirm that tracking servo control is not being performed (S6), and while performing force servo control, move the pickup 4 in the radial direction of the recording disk 2 while moving the tracking error pulse TER_P. Reference for a certain period (S7). The fixed period needs to be a time that can cross at least a plurality of information tracks, for example, 30 msec. The reference is, for example, counting the number of tracking error pulses TER-P. It is determined whether or not there is a track crossing with respect to the counting result (S8). For example, if the count value is smaller than the number n of tracks that can be traversed during the measurement time and is less than several m (0 <m << n), it is determined that there is no track crossing. If there is a crossing of the track, it is determined that the data recording surface of the DVD player RW is DL (S9), and the determination result is notified to the host device (S10). If there is no crossing of the track, it is determined that the drawing recording surface of any recording disk (S11), and the determination result is notified to the host device (S12). This notification is given to the host device 26 as the discrimination result signal 27 via the host interface 25 of FIG. At this time, when the host device 26 executes the laser label printing support program, in response to the determination result signal 27, the microcontroller 17 is instructed to print the laser label. 17 starts control for recording visible information by irradiating the drawing / recording surface VL of the recording disk 2 with laser light. At this time, when the host device 26 is executing a support program for reproducing recorded data or recording data, an error is displayed in response to the determination result signal 27.
[0037] 以上より、記録ディスクのデータ記録面と描画記録面を正確に判定することができる 。また、フォーカスサーボのみをオンさせる状態だけで、トラッキング誤差信号に基づ V、てトラック横断の有無を検出できるので、データ記録面力描画記録面力否かの処 理時間を短縮することができる。フォーカスサーチや反射光量の計測精度を特に高く しなくてもよいから、変換精度が極めて高い AZD変 を用意しなくてもよいし、計 測に多大の時間を要することもない。特にヒステリシスコンパレータ 23を用いるのでノ ィズによる悪影響を受け難い。  As described above, the data recording surface and the drawing recording surface of the recording disk can be accurately determined. In addition, since it is possible to detect the presence or absence of track crossing based on the tracking error signal only when the focus servo is turned on, it is possible to shorten the processing time for data recording force drawing and recording force. . Since the focus search and reflected light measurement accuracy do not have to be particularly high, it is not necessary to prepare an AZD change with extremely high conversion accuracy, and the measurement does not take much time. In particular, since hysteresis comparator 23 is used, it is not easily affected by noise.
[0038] 図 9には図 8のステップ S7、 S8におけるトラック横断の有無判定に関する別の例が 示される。図 9ではトラッキング誤差信号 TERを AZD変翻 40でアナログ信号から ディジタル信号に変換し、変換されたトラッキング誤差データ TER Dをマイクロコン トローラ 17Aが入力する。マイクロコントローラ 17Aはディスク判別処理において、図 8 のステップ S6の次に、トラッキング誤差データ TER—Dからトラッキング誤差信号の 振幅が所定時間（例えば 30msec)内に一定レベル以下であるかを判別する。一定 レベルとは、例えばトラック横断によって得られるトラッキング誤差信号の振幅よりも小 さくノイズによる振幅よりも大きなレベル、例えば 200mVである。マイクロコントローラ 17Aはトラッキング誤差信号の振幅が一定レベル以下であることを検出した時はトラ ック横断無しと判定し、一定レベルを超えたことを検出した時はトラック横断有りと判 別する。その他の構成は今までと同様であるからその詳細な説明は省略する。これに よっても上記同様の効果を得ることができる。ヒステリシスコンパレータを用いることな くノイズの影響を排除することができる。 FIG. 9 shows another example relating to the determination of the presence or absence of track crossing in steps S 7 and S 8 of FIG. In Fig. 9, the tracking error signal TER is converted from an analog signal to a digital signal by AZD conversion 40, and the converted tracking error data TER D is converted to a microcomputer. Entered by Trawler 17A. In the disc discrimination process, the microcontroller 17A discriminates from the tracking error data TER-D whether the amplitude of the tracking error signal is below a certain level within a predetermined time (for example, 30 msec) after step S6 in FIG. The constant level is, for example, a level that is smaller than the amplitude of the tracking error signal obtained by crossing the track and larger than the amplitude due to noise, for example, 200 mV. Microcontroller 17A determines that there is no track crossing when it detects that the amplitude of the tracking error signal is below a certain level, and it determines that there is track crossing when it detects that it exceeds a certain level. Since the other configuration is the same as before, detailed description thereof is omitted. This also provides the same effect as described above. Noise effects can be eliminated without using a hysteresis comparator.
[0039] 図 10には図 8のステップ S7、 S8におけるトラック横断の有無判定に関する更に別 の例が示される。図 10は図 9と図 2の構成を併せ持つ。マイクロコントローラ 17Bは、 ヒステリシスコンパレータ 23から出力されるトラッキング誤差パルス TER—Pと、 A/D 変翻 40から出力されるトラッキング誤差データ TER_Dを入力する。マイクロコント ローラ 17Bはディスク判別処理において、図 8のステップ S7、 S8と同じくトラキング誤 差パルス TER—Pを一定期間計数してトラック横断の有無を判定し、且つ、トラツキン グ誤差データ TER—Dからトラッキング誤差信号の振幅が所定時間内に一定レベル 以下であるかを判別することによってトラック横断の有無を判定する。双方の判定結 果が一致のとき当該判定結果を採用し、不一致のときは判定処理をやり直す。今ま での例に比べて判定結果に高い精度を得ることができる。  FIG. 10 shows still another example relating to the presence / absence of track crossing in steps S7 and S8 in FIG. Figure 10 has the configuration of Figure 9 and Figure 2 together. The microcontroller 17B receives the tracking error pulse TER—P output from the hysteresis comparator 23 and the tracking error data TER_D output from the A / D conversion 40. In the disc discrimination process, the microcontroller 17B counts the tracking error pulse TER-P for a certain period in the same manner as steps S7 and S8 in FIG. 8 to determine whether or not there is a track crossing, and from the tracking error data TER-D. The presence or absence of track crossing is determined by determining whether the amplitude of the tracking error signal is below a certain level within a predetermined time. If both judgment results match, the judgment result is adopted, and if they do not match, the judgment process is repeated. Compared to the previous examples, higher accuracy can be obtained in the judgment results.
[0040] 図 1に示されるマルチディスクドライブ装置において、 42で示される回路ブロックは 、特に制限されないが、単一の半導体チップに形成した SOC (システム'オン'チップ )の LSIであってもよい。このとき、 LSI42に対してフラッシュメモリ 22を別の半導体チ ップで構成するとき、 LSI42とフラッシュメモリ 22のマルチチップを単一のパッケージ に封止した SIP (システム ·イン ·パッケージ)の半導体装置 28を採用してもょ 、。  In the multi-disk drive device shown in FIG. 1, the circuit block shown by 42 is not particularly limited, but may be a SOC (system 'on' chip) LSI formed on a single semiconductor chip. . At this time, when the flash memory 22 is configured with another semiconductor chip for the LSI 42, a SIP (system-in-package) semiconductor device in which a multi-chip of the LSI 42 and the flash memory 22 is sealed in a single package. Adopt 28.
[0041] 以上本発明者によってなされた発明を実施形態に基づいて具体的に説明したが、 本発明はそれに限定されるものではなぐその要旨を逸脱しない範囲において種々 変更可能であることは言うまでもない。例えば、上記説明では DVD士 RWのデータ 記録面と高感光度の描画記録面との反射率の差は小さ ヽ場合を一例としたが、描画 記録面に塗布される感光性塗料によっては更に反射率が高くなる場合もあれば、逆 に低くなる場合もあり、フォーカスサーチによってデータ記録面と描画記録面との識 別が難し 、記録ディスクは DVD士 RWに限定されな 、。 DVD記録ディスクにも限定 されない。マイクロコントローラ 17には CPU (中央処理装置）とその周辺回路を備え たマイクロコンピュータを採用してもよい。本発明は描画記録面の判別だけでなぐ記 録済みの DVD— ROMにおけるタイトル印刷面のような非信号記録面を判別する制 御にも適用することができ、その処理を短時間で正確に行なうことが可能になる。 産業上の利用可能性 [0041] Although the invention made by the present inventor has been specifically described based on the embodiments, it is needless to say that the present invention is not limited thereto and can be variously modified without departing from the gist thereof. . For example, in the above explanation, DVD The difference in reflectivity between the recording surface and the high-sensitivity drawing / recording surface is small. However, depending on the photosensitive paint applied to the drawing / recording surface, the reflectance may be higher or vice versa. However, the focus search makes it difficult to distinguish between the data recording surface and the drawing recording surface, and the recording disk is not limited to DVD RW. It is not limited to DVD recording discs. The microcontroller 17 may be a microcomputer having a CPU (central processing unit) and its peripheral circuits. The present invention can also be applied to control for discriminating a non-signal recording surface such as a title printing surface in a recorded DVD-ROM that is not only based on the discrimination of the drawing / recording surface, and the processing can be accurately performed in a short time. It becomes possible to do. Industrial applicability
本発明は CD— R、 DVD-R, DVD— RAMなどの PC周辺機器の記録ディスクド ライブ装置に適応可能である。また、民生用の DVDレコーダなどにも適応可能であ る。  The present invention is applicable to recording disk drive devices for PC peripheral devices such as CD-R, DVD-R, and DVD-RAM. It can also be applied to consumer DVD recorders.

Claims

請求の範囲 The scope of the claims
[1] 装着された記録ディスクに光学的なピックアップ力 レーザ光を照射してディスク判 別処理を行ない、その判別結果に従って、フォーカスサーボ制御とトラッキングサー ボ制御を行って前記記録ディスクの信号記録面には情報の記録と再生が可能であり 、且つ前記記録ディスクの非信号記録面にはレーザ光を照射して可視情報を記録可 能なディスクドライブ装置であって、  [1] Optical pick-up force on the mounted recording disk The laser disc is irradiated to perform disc discrimination processing, and according to the discrimination result, focus servo control and tracking servo control are performed, and the signal recording surface of the recording disc Is a disk drive device capable of recording and reproducing information and recording visible information by irradiating a laser beam onto the non-signal recording surface of the recording disk,
前記ディスク判別処理は、レーザ光を前記記録ディスクに照射して前記フォーカス サーボ制御を行い且つ前記トラッキングサーボ制御を行わずに前記ピックアップの対 物レンズとレーザ光受光面との距離を一定に保ちながら前記ピックアップを前記記録 ディスクの半径方向に移動させてトラッキング誤差信号を生成し、トラッキング誤差信 号に基づいて所定時間内にトラック横断を検出しないとき、前記記録ディスクのレー ザ光受光面が信号記録面以外であることを示す判別結果信号をホストインタフェース 回路から出力するディスクドライブ装置。  In the disc discrimination process, the focus servo control is performed by irradiating the recording disc with laser light and the distance between the pickup lens and the laser light receiving surface is kept constant without performing the tracking servo control. When the pickup is moved in the radial direction of the recording disk to generate a tracking error signal and the crossing of the track is not detected within a predetermined time based on the tracking error signal, the laser light receiving surface of the recording disk performs signal recording. A disk drive device that outputs a discrimination result signal indicating that it is other than the surface from the host interface circuit.
[2] 前記ディスク判別処理にお!、て前記記録ディスクのレーザ光受光面が信号記録面 以外であることを検出したとき、前記記録ディスクの非信号記録面にレーザ光を照射 して可視情報を記録する可視情報記録動作が可能にされる、請求項 1記載のデイス クドライブ装置。  [2] In the disc discrimination process, when it is detected that the laser light receiving surface of the recording disc is other than the signal recording surface, the non-signal recording surface of the recording disc is irradiated with laser light to make visible information The disk drive device according to claim 1, wherein a visible information recording operation for recording is enabled.
[3] 前記ディスク判別処理において、トラッキング誤差信号を 2値ィ匕したパルスのパルス 数が所定時間内に一定数以下であるとき、記録ディスクのレーザ光照射面が信号記 録面以外であると判別する、請求項 1記載のディスクドライブ装置。  [3] In the disc discrimination process, when the number of pulses obtained by binarizing the tracking error signal is equal to or less than a certain number within a predetermined time, the laser light irradiation surface of the recording disc is other than the signal recording surface. The disk drive device according to claim 1, wherein the disk drive device is determined.
[4] 前記トラッキング誤差信号を 2値ィ匕するヒステリシスコンパレータを更に有し、  [4] It further has a hysteresis comparator for binarizing the tracking error signal,
前記ディスク判別処理において、ヒステリシスコンパレータから出力されるパルスを 用いて前記判別を行う、請求項 3記載のディスクドライブ装置。  4. The disk drive device according to claim 3, wherein, in the disk determination process, the determination is performed using a pulse output from a hysteresis comparator.
[5] 前記ディスク判別処理において、トラッキング誤差信号の振幅が所定時間内に一定 レベル以下であるとき、記録ディスクのレーザ光照射面が信号記録面以外であると判 別する、請求項 1記載のディスクドライブ装置。  [5] The disc discriminating process according to claim 1, wherein, in the disc discrimination processing, when the amplitude of the tracking error signal is below a certain level within a predetermined time, it is discriminated that the laser light irradiation surface of the recording disc is other than the signal recording surface. Disk drive device.
[6] 前記ディスク判別処理において、トラッキング誤差信号を 2値ィ匕したパルスのパルス 数が所定時間内に一定数以下で、且つ、トラッキング誤差信号の振幅が所定時間内 に一定レベル以下であるとき、記録ディスクのレーザ光照射面が信号記録面以外で あると判別する、請求項 1記載のディスクドライブ装置。 [6] In the disc discrimination process, the number of pulses obtained by binarizing the tracking error signal is equal to or less than a certain number within a predetermined time, and the amplitude of the tracking error signal is within a predetermined time. 2. The disk drive device according to claim 1, wherein the laser beam irradiation surface of the recording disk is determined to be other than the signal recording surface when the level is below a certain level.
[7] 装着された記録ディスクに対物レンズを介してレーザ光を照射し、前記記録ディスク 力 の反射光を光検出器で光電変換し、第 1ァクチ ータにより前記対物レンズをそ の焦点深度内に移動可能とする光学的なピックアップと、前記ピックアップを前記記 録ディスクの半径方向に移動する第 2ァクチ ータと、前記光検出器の出力に基づ!/、 てフォーカス誤差信号及びトラッキング誤差信号を生成するアンプ回路と、前記フォ 一カス誤差信号に基づいて前記対物レンズと前記記録ディスクのレーザ光受光面と の距離を一定に保つように前記第 1ァクチエータを制御するフォーカスサーボ制御回 路と、前記トラッキング誤差信号に基づ!ヽて前記ピックアップを前記記録ディスクのト ラックに追従させるように前記第 2ァクチエータを制御するトラッキングサーボ回路と、 データ処理回路とを有し、装着された前記記録ディスクにレーザ光を照射してデイス ク判別処理を行な 、、その判別結果に従って前記記録ディスクの信号記録面に情報 の記録と再生が可能なディスクドライブ装置であって、 [7] The mounted recording disk is irradiated with laser light through the objective lens, the reflected light of the recording disk force is photoelectrically converted by a photodetector, and the objective lens is moved to its focal depth by the first character. An optical pickup that can be moved inward, a second character that moves the pickup in the radial direction of the recording disk, and a focus error signal and tracking based on the output of the photodetector! An amplifier circuit that generates an error signal, and a focus servo control circuit that controls the first actuator so as to keep the distance between the objective lens and the laser light receiving surface of the recording disk constant based on the focus error signal. And the second actuator is controlled based on the path and the tracking error signal so that the pickup follows the track of the recording disk. A racking servo circuit and a data processing circuit are provided to perform disk discrimination processing by irradiating the mounted recording disc with laser light, and record information on the signal recording surface of the recording disc according to the discrimination result. It is a disc drive device that can be played,
前記データ処理回路は、ディスク判別処理において、レーザ光を前記記録ディスク に照射し前記フォーカスサーボ制御回路により前記ピックアップのレンズと前記記録 ディスクのレーザ光受光面との距離を一定に保ちながら前記ピックアップを前記記録 ディスクの半径方向に移動させ、それによつて形成されるトラッキング誤差信号に基 づいて所定時間内にトラック横断を検出しないとき、前記記録ディスクのレーザ光受 光面が信号記録面以外であることを示す判別結果信号を生成する、ディスクドライブ 装置。  In the disk discrimination process, the data processing circuit irradiates the recording disk with laser light, and the focus servo control circuit controls the pickup while keeping the distance between the lens of the pickup and the laser light receiving surface of the recording disk constant. When a track crossing is not detected within a predetermined time based on a tracking error signal formed by moving the recording disk in the radial direction, the laser light receiving surface of the recording disk is other than the signal recording surface A disk drive device that generates a discrimination result signal indicating that
[8] 前記データ処理回路は、ディスク判別処理において前記記録ディスクのレーザ光 受光面が信号記録面以外であることを検出したとき、前記記録ディスクの非信号記録 面にレーザ光を照射して可視情報を記録する可視情報記録動作が可能にされる、 請求項 7記載のディスクドライブ装置。  [8] When the data processing circuit detects that the laser light receiving surface of the recording disk is other than the signal recording surface in the disk discrimination process, the data processing circuit irradiates the non-signal recording surface of the recording disk with laser light and makes it visible. 8. The disk drive device according to claim 7, wherein a visible information recording operation for recording information is enabled.
[9] 前記判別結果信号をディスクドライブ装置の外部に出力するホストインタフェース回 路を有する、請求項 7記載のディスクドライブ装置。  9. The disk drive device according to claim 7, further comprising a host interface circuit that outputs the determination result signal to the outside of the disk drive device.
[10] 前記データ処理回路は前記ディスク判別処理において、トラッキング誤差信号を 2 値ィ匕したノ ルスのパルス数が所定時間内に一定数以下であるとき、記録ディスクのレ 一ザ光照射面が信号記録面以外であると判別する、請求項 7記載のディスクドライブ 装置。 [10] The data processing circuit generates a tracking error signal 2 in the disc discrimination process. 8. The disk drive device according to claim 7, wherein when the number of pulses of the valued noise is equal to or less than a predetermined number within a predetermined time, the laser light irradiation surface of the recording disk is determined to be other than the signal recording surface.
[11] 前記トラッキング誤差信号を 2値ィ匕するヒステリシスコンパレータを更に有し、  [11] It further comprises a hysteresis comparator for binarizing the tracking error signal,
前記データ処理回路は前記ディスク判別処理にぉ ヽて、ヒステリシスコンパレータ 力も出力されるパルスを用いて前記判別を行う、請求項 10記載のディスクドライブ装 置。  11. The disk drive device according to claim 10, wherein the data processing circuit performs the determination using a pulse that also outputs a hysteresis comparator force during the disk determination process.
[12] 前記データ処理回路は前記ディスク判別処理において、トラッキング誤差信号の振 幅が所定時間内に一定レベル以下であるとき、記録ディスクのレーザ光照射面が信 号記録面以外であると判別する、請求項 7記載のディスクドライブ装置。  [12] In the disc discrimination processing, the data processing circuit discriminates that the laser light irradiation surface of the recording disc is other than the signal recording surface when the amplitude of the tracking error signal is below a certain level within a predetermined time. The disk drive device according to claim 7.
[13] 前記データ処理回路は前記ディスク判別処理にぉ 、て、トラッキング誤差信号を 2 値ィ匕したノ ルスのパルス数が所定時間内に一定数以下で、且つ、トラッキング誤差 信号の振幅が所定時間内に一定レベル以下であるとき、記録ディスクのレーザ光照 射面が信号記録面以外であると判別する、請求項 7記載のディスクドライブ装置。  [13] During the disc discrimination process, the data processing circuit has a number of pulses of a binary value obtained by binarizing the tracking error signal within a predetermined time, and the amplitude of the tracking error signal is predetermined. 8. The disk drive device according to claim 7, wherein when it is below a certain level within the time, the laser light irradiation surface of the recording disk is determined to be other than the signal recording surface.
[14] 記録ディスクの定位置にレーザ光を照射するためのサーボ制御と、記録ディスクの 信号記録面に情報の記録と再生を行うための信号処理とに用いられる半導体装置 であって、  [14] A semiconductor device used for servo control for irradiating a laser beam to a fixed position of a recording disk and signal processing for recording and reproducing information on a signal recording surface of the recording disk,
レーザ光が照射された記録ディスク力 の反射光の光電変換信号に基づいてフォ 一カス誤差信号及びトラッキング誤差信号を生成するアンプと、前記フォーカス誤差 信号に基づいて対物レンズと前記記録ディスクのレーザ光受光面との距離を一定に 保っためのサーボ制御を行うフォーカスサーボ制御回路と、前記対物レンズとレーザ 光源を有する光学的なピックアップを前記トラッキング誤差信号に基づいて前記記録 ディスクのトラックに追従させるサーボ制御を行うトラッキングサーボ制御回路と、プロ グラムを実行する演算処理装置と、前記プログラムを格納する不揮発性メモリと、を有 し、  An amplifier that generates a focus error signal and a tracking error signal based on a photoelectric conversion signal of reflected light of the recording disk force irradiated with the laser light, and an objective lens and a laser light of the recording disk based on the focus error signal A focus servo control circuit that performs servo control to keep the distance from the light receiving surface constant, and a servo that causes an optical pickup having the objective lens and a laser light source to follow the track of the recording disk based on the tracking error signal A tracking servo control circuit for performing control, an arithmetic processing unit for executing the program, and a nonvolatile memory for storing the program,
前記演算処理装置は、レーザ光を前記記録ディスクに照射し前記フォーカスサー ボ制御回路により前記ピックアップのレンズと前記記録ディスクのレーザ光受光面と の距離を一定に保ちながら前記ピックアップを前記記録ディスクの半径方向に移動さ せ、それによつて形成されるトラッキング誤差信号に基づいて所定時間内にトラック横 断を検出しな 、とき、前記記録ディスクのレーザ光受光面が信号記録面以外であると 判定し、この判定結果を得ることを条件に、前記記録ディスクの非信号記録面にレー ザ光を照射して可視情報を記録する可視情報記録動作を可能にする、半導体装置 The arithmetic processing unit irradiates the recording disk with laser light, and the focus servo control circuit keeps the distance between the lens of the pickup and the laser light receiving surface of the recording disk constant, and the pickup is attached to the recording disk. Moved in the radial direction If the track crossing is not detected within a predetermined time based on the tracking error signal formed thereby, it is determined that the laser light receiving surface of the recording disk is other than the signal recording surface, and this determination result A semiconductor device capable of recording visible information by irradiating laser light onto the non-signal recording surface of the recording disk on the condition that
[15] 前記アンプ、前記フォーカスサーボ制御回路、前記トラッキングサーボ制御回路、 前記演算処理装置、及び前記不揮発性メモリを構成するシングルチップ又はマルチ チップを 1個のパッケージに封止して成る請求項 1記載の半導体装置。 15. The amplifier, the focus servo control circuit, the tracking servo control circuit, the arithmetic processing unit, and a single chip or a multi chip constituting the nonvolatile memory are sealed in one package. The semiconductor device described.
PCT/JP2006/321606 2006-10-30 2006-10-30 Disc drive device and semiconductor device WO2008053513A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03130932A (en) * 1989-10-14 1991-06-04 Omron Corp Optical card processor
JP2000285477A (en) * 1999-03-26 2000-10-13 Seiko Epson Corp Optical recording apparatus and method of generating track cross signal
JP2002324380A (en) * 2001-04-26 2002-11-08 Ricoh Co Ltd Optical disk system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03130932A (en) * 1989-10-14 1991-06-04 Omron Corp Optical card processor
JP2000285477A (en) * 1999-03-26 2000-10-13 Seiko Epson Corp Optical recording apparatus and method of generating track cross signal
JP2002324380A (en) * 2001-04-26 2002-11-08 Ricoh Co Ltd Optical disk system

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