WO2008053513A1 - Dispositif de commande de disque et dispositif à semi-conducteur - Google Patents

Dispositif de commande de disque et dispositif à semi-conducteur 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
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WO
WIPO (PCT)
Prior art keywords
recording
disk
signal
disc
laser light
Prior art date
Application number
PCT/JP2006/321606
Other languages
English (en)
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/fr
Priority to JP2008541927A priority patent/JPWO2008053513A1/ja
Priority to TW096140339A priority patent/TW200832378A/zh
Publication of WO2008053513A1 publication Critical patent/WO2008053513A1/fr

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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.

Landscapes

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

Abstract

L'invention concerne un dispositif de commande de disque (1) dans lequel est mis en oeuvre un procédé de distinction de disque par exposition d'un disque d'enregistrement (2) mis en place, à un rayonnement laser émanant d'un lecteur optique (4). Sur la base des résultats de distinction, une servocommande de focalisation et une servocommande de poursuite sont effectuées. L'enregistrement et la reproduction des informations peuvent être effectués de et vers une surface d'enregistrement de signaux du disque d'enregistrement. Lorsque le lecteur optique est décalé dans une direction de rayon du disque d'enregistrement et que simultanément la servocommande de focalisation est utilisée dans le procédé de distinction de disque, on détecte la présence d'une traversée de piste sur la base d'un signal d'erreur de poursuite (TER) dans les limites d'un temps prédéterminé. En l'absence d'erreur, la surface est reconnue en tant que surface d'enregistrement de signaux, par exemple, une surface d'impression laser revêtue d'une matière de revêtement photosensitible au laser. L'utilisation d'un signal d'erreur de piste permet d'exécuter la commande de distinction correcte de la surface d'enregistrement de signaux du disque d'enregistrement dans un temps court.
PCT/JP2006/321606 2006-10-30 2006-10-30 Dispositif de commande de disque et dispositif à semi-conducteur WO2008053513A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2006/321606 WO2008053513A1 (fr) 2006-10-30 2006-10-30 Dispositif de commande de disque et dispositif à semi-conducteur
JP2008541927A JPWO2008053513A1 (ja) 2006-10-30 2006-10-30 ディスクドライブ装置及び半導体装置
TW096140339A TW200832378A (en) 2006-10-30 2007-10-26 Disc drive device and semiconductor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2006/321606 WO2008053513A1 (fr) 2006-10-30 2006-10-30 Dispositif de commande de disque et dispositif à semi-conducteur

Publications (1)

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WO2008053513A1 true WO2008053513A1 (fr) 2008-05-08

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PCT/JP2006/321606 WO2008053513A1 (fr) 2006-10-30 2006-10-30 Dispositif de commande de disque et dispositif à semi-conducteur

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JP (1) JPWO2008053513A1 (fr)
TW (1) TW200832378A (fr)
WO (1) WO2008053513A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03130932A (ja) * 1989-10-14 1991-06-04 Omron Corp 光カード処理装置
JP2000285477A (ja) * 1999-03-26 2000-10-13 Seiko Epson Corp 光記録装置およびトラッククロス信号生成方法
JP2002324380A (ja) * 2001-04-26 2002-11-08 Ricoh Co Ltd 光ディスクシステム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03130932A (ja) * 1989-10-14 1991-06-04 Omron Corp 光カード処理装置
JP2000285477A (ja) * 1999-03-26 2000-10-13 Seiko Epson Corp 光記録装置およびトラッククロス信号生成方法
JP2002324380A (ja) * 2001-04-26 2002-11-08 Ricoh Co Ltd 光ディスクシステム

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TW200832378A (en) 2008-08-01

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