WO2007060579A1 - Systeme et procede pour minimiser la dissipation de puissance lors de l'enregistrement de donnees sur un disque optique - Google Patents

Systeme et procede pour minimiser la dissipation de puissance lors de l'enregistrement de donnees sur un disque optique Download PDF

Info

Publication number
WO2007060579A1
WO2007060579A1 PCT/IB2006/054289 IB2006054289W WO2007060579A1 WO 2007060579 A1 WO2007060579 A1 WO 2007060579A1 IB 2006054289 W IB2006054289 W IB 2006054289W WO 2007060579 A1 WO2007060579 A1 WO 2007060579A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency
reading
rotating
data
record carrier
Prior art date
Application number
PCT/IB2006/054289
Other languages
English (en)
Inventor
Tony Petrus Van Endert
Original Assignee
Koninklijke Philips Electronics N.V.
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 Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Priority to EP06821469A priority Critical patent/EP1958193A1/fr
Priority to JP2008541862A priority patent/JP2009517789A/ja
Publication of WO2007060579A1 publication Critical patent/WO2007060579A1/fr

Links

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
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/28—Speed controlling, regulating, or indicating
    • 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
    • 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
    • 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
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/26—Speed-changing arrangements; Reversing arrangements; Drive-transfer means therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing

Definitions

  • the invention relates to a method of operating a data recording device and a data recording device implementing such a method.
  • a particular application of the invention relates to an optical data recording device using a laser for both reading and writing of data on an optical disk.
  • V r . ⁇
  • r the distance between the data point and the center of the optical disk, namely a radius
  • ⁇ is the rotating speed of the spindle motor that rotates the optical disk.
  • V, r, ⁇ has to be constant. Since the radius r varies with the position of the data point, only V or ⁇ can be constant. Therefore, the spindle motor can generally rotate the optical disk according to either a constant linear velocity mode or a constant angular velocity mode.
  • the rotation mode of the spindle motor is called constant linear velocity.
  • the advantages of this mode are that the data transfer rate is kept fixed, and that a phase lock loop can maintain the correct data readout only by locking a fixed frequency.
  • the rotating speed of the spindle motor has to change synchronously with respect to the position of the optical head. If the rotating speed keeps increasing to some extent, it shall be put into consideration that whether the spindle motor can achieve the predetermined high speed when the optical head is in inner tracks.
  • the rotation mode is called constant angular velocity. It is easier to control the spindle motor in this mode since the spindle motor rotates with a fixed angular velocity, which is just different from constant linear velocity. However, the data transfer rate in outer tracks is higher than that in inner tracks. Therefore, the phase lock loop has to follow the data readout to modify the fundamental frequency that should be locked when in constant angular velocity mode.
  • Optical drive systems are usually calibrated to get a maximum system margins (i.e. handling disturbances like offset without reading/writing errors), a maximum data transfer rate or a short access time.
  • the constant angular velocity mode or the constant linear velocity mode result in an increase of the power consumption of the optical drive systems and, thus, of the power dissipation into the optical drive systems.
  • DRD data recording device
  • OH reading/writing head
  • TM turntable motor
  • This method comprises the step of generating a control signal (S TM ) for varying the rotating frequency (f) of said turntable motor (TM) according to a frequency profile defining the rotating frequency as a function of a position (R) of the reading/writing head (OH) on the data record carrier (OM), said frequency profile comprising a first portion (CLV) during which the rotating frequency is decreased from a starting frequency to an intermediate frequency, said first portion (CLV) being followed by a second portion (VLV) during which the rotating frequency is increased from said intermediate frequency to a final frequency.
  • S TM control signal
  • the rotating frequency may be decreased substantially linearly along the first portion.
  • the rotating frequency may be increased substantially linearly along the second portion.
  • the intermediate frequency corresponds to a determined position of the reading/writing head on the data record carrier.
  • the determined position of the reading/writing head is adjustable.
  • the determined position of the reading/writing head may correspond to an outside area of the data record carrier.
  • the invention relates to a computer program product for a data recording device, the computer program product comprising a set of instructions that, when loaded into the data recording device, causes the data recording device to carry out the method according to the invention.
  • the invention relates to a data recording device comprising a reading/writing head for reading/writing data on a data record carrier insertable into the data recording device, a turntable motor for rotating the data record carrier and an electronic arrangement coupled to the turntable motor.
  • the electronic arrangement operates the turntable motor according to the steps of the method according to the invention.
  • the rotating frequency may be decreased from the starting frequency to the intermediate frequency so that a core current of the electronic arrangement is maintained constant.
  • the adaptive frequency profile of the invention enables reducing the power dissipation in the driving module controlling the turntable motor. Due to the electronic arrangement clock frequency reduction and core current reduction linked to the adaptive frequency profile of the invention, the invention further enables reducing power dissipation in the driving module that controls the other components of the data record device (e.g. sled motor, reading/writing head components, etc).
  • the data record device e.g. sled motor, reading/writing head components, etc.
  • Fig.l is a block diagram schematically and partially illustrating a data recording device comprising an electronic arrangement performing the method according to the invention
  • Fig.2 illustrates two frequency profiles indicating the rotating frequency as a function of the position of the reading/writing head on the data record carrier
  • Fig.3 shows two curves illustrating a core current of the electronic arrangement as a function of the position of the reading/writing head on the data record carrier; and Fig.4 illustrates alternatives of frequency profiles indicating the rotating frequency as a function of the position of the reading/writing head on the data record carrier.
  • Fig.l is a block diagram schematically and partially illustrating a data recording device DRD.
  • the data recording device DRD carries out operations that relates to both reading and writing of information on a data record carrier OM.
  • the data recording device comprises a reading/writing head OH, a turntable motor TM (also called a spindle motor), a sled motor SM and an electronic arrangement EA.
  • a data record carrier OM is shown inserted in the recording device.
  • the data record carrier OM is shown inserted in the recording device.
  • OM may be an optical disk.
  • the surface of the optical disk may comprise a single spiral circling from the inside of the disk to the outside of the disk.
  • the binary information recorded on the track is represented by optically detectable portions, namely marks and spaces. The marks and spaces are detectable due to their different optical properties, e.g. variation in reflection of a laser beam.
  • the reading/writing head OH comprises radiation source, e.g. a laser diode, generating a radiation beam, e.g. a laser beam. By controlling the power of the laser beam, it is possible to read or write information on the data record carrier OM.
  • the reading/writing head OH also comprises various optical elements for guiding and focusing the laser beam on the track of the data record carrier OM.
  • the reading/writing head OH further comprises a detector, e.g. a four-quadrant diode, for detecting and measuring the laser beam reflected by the optically detectable portions on the data record carrier track.
  • the turntable motor TM rotates the data record carrier OM according to an angular speed m proportional to a rotating frequency. The rotating frequency determines the reading/writing mode and speed associated with the data recording device DRD.
  • the sled motor SM controls the radius R, namely the position of the reading/writing head OH with respect to the track.
  • the position R designates the distance between the central axis AX of the data record carrier OM and the focusing spot FS of the laser beam emitted towards the track of the data record carrier.
  • the data recording device DRD may further comprise a loading unit (not shown) for inserting or removing the data record carrier.
  • the electronic arrangement EA comprises a processing module PRO and a driving module DRV.
  • the processing module PRO may comprise a data encoding module, a control module, and a laser power control module that are connected together through a bus (these elements have been omitted in the figure for clarity reasons).
  • the data encoding module function is to encode and decode data according to predefined recording format.
  • the data encoding module provides signals used to write marks on the optical record carrier OM, and also timing signals.
  • the processing module PRO may receive commands from a consumer electronic device (audio device, video device, computer, television, etc .).
  • the laser power control module provides a laser power control signal to the reading/writing head OH in order to set the reading/writing power of the laser source.
  • a laser power control module operates in dependence of three input signals in order to control the laser power.
  • the input signals are known as the delta signal, the threshold signal and the alpha signal.
  • the processing module PRO may also be connected to an interface module (not shown).
  • the interface module allows connecting the data recording device DRD with other electronic circuits which are generally comprised in the consumer electronic device.
  • the operation of the processing module requires a clock frequency elk and a core current Ic.
  • the driving module DRV is coupled to the processing module PRO.
  • the driving module DRV controls the turntable TM and sled SM motors, and the elements of the reading/writing head OH of the data recording device DRD. More precisely, the driving module DRV provides a first motor signal S TM to the turntable motor TM for controlling the rotating frequency of the optical disk OM.
  • the driving module DRV provides a second motor signal S SM to the sled motor SM for controlling the position of the reading/writing head OH and thus the scanning of the track of the optical disk OM.
  • the driving module DRV provides a plurality of reading/writing head signals S OH to the reading/writing head OH for controlling the focusing, collimating and tilting parameters of the reading/writing head OH.
  • Fig.2 illustrates two frequency profiles CAV and (CLV, VLV) corresponding to the rotating frequency of the turntable motor TM as a function of the position of the reading/writing head on the data record carrier.
  • the rotating frequency is proportional to the angular speed ⁇ J of the turntable motor.
  • a first frequency profile CAV corresponds to a typical operating mode according to the prior art (dotted line).
  • a second frequency profile corresponds to an operating mode according to the invention (plain line), namely a combination of a constant linear velocity portion CLV and a variable linear velocity portion VLV.
  • the first frequency profile CAV is associated to a turntable motor operating according to a constant angular velocity.
  • the constant angular velocity corresponds, for example, to a rotating frequency f of 155 Hz.
  • the first frequency profile CAV evolves from a starting data transfer rate SSx to a final data transfer rate SFx.
  • the starting data transfer rate SSx may correspond to a standardized six time speed.
  • the final data transfer rate SFx may correspond to a standardized sixteen time speed.
  • the data transfer rate is increased linearly as a function of the radius R from the starting data transfer rate SSx to the final data transfer rate SFx.
  • the starting data transfer rate SSx is associated with the reading/writing head positioned at a radius R corresponding to an inside area of the optical disk OM, for example a radius R around 0.022 m.
  • the final data transfer rate SFx is associated with the reading/writing head positioned at a radius R corresponding to an outside area of the optical disk OM, for example a radius R around 0.058 m.
  • the second frequency profile CLV, VLV corresponds to a turntable motor operating according to a partial linear velocity.
  • the second frequency profile comprises a first portion CLV and a second portion VLV.
  • the data transfer rate evolves from a starting data transfer rate SSx to an intermediate data transfer rate SCP, while the rotating frequency f decreases.
  • the rotating frequency is decreased substantially linearly along the first portion.
  • other kind of decreasing profile may be used, e.g. logarithmic decreasing.
  • the starting data transfer rate SSx may correspond to a standardized six time speed, while the starting rotating frequency fl may be around 155 Hz.
  • the intermediate data transfer rate SCP is lower than the starting data transfer rate SSx, while the intermediate rotating frequency f2 may be around 75 Hz.
  • the data transfer rate is decreased as a function of the radius R from the starting data transfer rate SSx to the intermediate data transfer rate SCP.
  • the data transfer rate evolves from the intermediate data transfer rate to a final data transfer rate, while the rotating frequency f increases.
  • the rotating frequency is increased substantially linearly along the second portion.
  • other kind of increasing profile may be used, e.g. exponential increasing.
  • the final data transfer rate SFx may correspond to a standardized sixteen time speed, while the final rotating frequency O may be around 155 Hz.
  • the data transfer rate is increased from the intermediate data transfer rate SCP to the final data transfer rate SFx.
  • the laser source power and other write strategy parameters may be changed as function of the data transfer rate.
  • the hatched area PSl between the first frequency profile and the second frequency profile is proportional to the power dissipation reduction in the driving module resulting from the frequency profile according to the invention.
  • Fig.4 illustrates alternatives of frequency profiles shown in Fig.2.
  • the determined position of the reading/writing head may be adjustable to various positions. Each position corresponds to a particular intermediate data transfer rate / rotating frequency pair.
  • the particular intermediate data transfer rate / rotating frequency pair defines a determined switching point between the constant linear velocity portion CLV and the variable linear velocity portion VLV of the frequency profile according to the invention.
  • Fig.4 shows four examples of frequency profiles comprising a first SCP 1 ZG 1 , a second SCP 2 ZG 2 , a third
  • the determined switching point may be adjusted as a function of various parameter of the data recording device DRD, e.g. as function of the laser temperature, or defining an acceptable compromise between throughput rate (a whole data record carrier writing speed) and power dissipation.
  • the determined switching point may be adjusted by the processing module and can be made adaptive to the particular consumer electronic device application to which the data recording device is coupled (e.g. through calibration).
  • the switching point will correspond to the fourth SCP n ZG n intermediate data transfer rate Z rotating frequency pair.
  • the frequency profile will be adjusted so that the switching point may correspond to the first SCPiZGi intermediate data transfer rate Z rotating frequency pair.
  • Fig.3 shows two current curves illustrating a core current Ic of the electronic arrangement
  • a first current curve CAVCl, CAVC2 corresponds to the typical operating mode according to the prior art (dotted line).
  • a second current curve CLVC, VLVC corresponds to an operating mode according to the invention (plain line).
  • the first current curve CAVCl, CAVC2 is associated with the first frequency profile CAV shown in Fig.2.
  • the first current curve comprises a first current curve portion CAVCl and a second current curve portion CAVC2.
  • the first current curve portion CAVCl is associated with reading/writing operation at an inside area of the optical disk OM.
  • the data transfer rate is low resulting in a low processing module clock frequency and a low core current.
  • the core current Ic may be around 200 mA for an inside area, namely a radius R between 0.022 m and 0.034 m.
  • the second current curve portion CAVC2 is associated with reading/writing operation out of the inside area of the optical disk OM. Out of the inside area, there is a sudden change of the data transfer rate resulting in a greater processing module clock frequency and a greater core current.
  • the core current Ic may change suddenly to 260 mA and increase slightly to 270 mA for an area between 0.034 m and 0.058 m.
  • the second current curve CLVC, VLVC is associated with the second frequency profile
  • the second current curve comprises a first current curve portion CLVC and a second current curve portion VLVC.
  • the first current curve portion CLVC is associated with the reduction of the rotating frequency f (see Fig.2) and with the reduction of the data transfer rate.
  • the data transfer rate is low resulting in a low processing module clock frequency.
  • the core current Ic may be around 200 mA for a position of the reading/writing head between a radius R of 0.022 m and 0.050 m.
  • the second current curve portion VLVC is associated with reading/writing operation at an outside area of the optical disk OM.
  • the core current Ic may increase from 200 mA to 270 mA for an outside area between 0.050 m and 0.058 m.
  • the hatched area PS2 between the first current curve and the second current curve is proportional to the power dissipation reduction in the driving module resulting from the frequency profile according to the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Rotational Drive Of Disk (AREA)

Abstract

La présente invention concerne un système et un procédé pour faire fonctionner un dispositif d'enregistrement de données (DRD) qui comprend une tête de lecture/écriture (OH) conçue pour lire/écrire des données sur un support d'enregistrement de données (OM), ainsi qu'un moteur de platine (TM) conçu pour faire tourner ce support d'enregistrement de données (OM). Ledit procédé consiste à produire un signal de commande (STM) pour faire varier la fréquence de rotation (f) du moteur de platine (TM) conformément à un profil de fréquence qui définit la fréquence de rotation en tant que fonction d'une position (R) de la tête de lecture/écriture (OH) sur le support d'enregistrement de données (OM), ce profil de fréquence comprenant une première partie (CLV) durant laquelle la fréquence de rotation est réduite depuis une fréquence de départ jusqu'à une fréquence intermédiaire, suivie d'une seconde partie (VLV) durant laquelle la fréquence de rotation est augmentée depuis la fréquence intermédiaire jusqu'à une fréquence finale.
PCT/IB2006/054289 2005-11-24 2006-11-16 Systeme et procede pour minimiser la dissipation de puissance lors de l'enregistrement de donnees sur un disque optique WO2007060579A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06821469A EP1958193A1 (fr) 2005-11-24 2006-11-16 Systeme et procede pour minimiser la dissipation de puissance lors de l'enregistrement de donnees sur un disque optique
JP2008541862A JP2009517789A (ja) 2005-11-24 2006-11-16 光ディスクにデータを記録する間の電力消費を最小限にするシステム及び方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200510127235 2005-11-24
CN200510127235.8 2005-11-24

Publications (1)

Publication Number Publication Date
WO2007060579A1 true WO2007060579A1 (fr) 2007-05-31

Family

ID=37898784

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/054289 WO2007060579A1 (fr) 2005-11-24 2006-11-16 Systeme et procede pour minimiser la dissipation de puissance lors de l'enregistrement de donnees sur un disque optique

Country Status (6)

Country Link
EP (1) EP1958193A1 (fr)
JP (1) JP2009517789A (fr)
KR (1) KR20080070082A (fr)
CN (1) CN101313360A (fr)
TW (1) TW200823890A (fr)
WO (1) WO2007060579A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004010430A1 (fr) * 2002-07-22 2004-01-29 Koninklijke Philips Electronics N.V. Commande de vitesse de rotation destinee a enregistrer des informations

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004010430A1 (fr) * 2002-07-22 2004-01-29 Koninklijke Philips Electronics N.V. Commande de vitesse de rotation destinee a enregistrer des informations

Also Published As

Publication number Publication date
EP1958193A1 (fr) 2008-08-20
KR20080070082A (ko) 2008-07-29
TW200823890A (en) 2008-06-01
JP2009517789A (ja) 2009-04-30
CN101313360A (zh) 2008-11-26

Similar Documents

Publication Publication Date Title
US6928567B2 (en) Information processing system in which power supply information of a recording/reproducing unit controls operations of a host computer
US6738877B1 (en) Access control method, storage apparatus and storage medium
US6519213B1 (en) Method and apparatus for reading data from a disk
JP2003168216A (ja) 光記録媒体、並びに、光記録媒体に対する記録装置及び方法
US6330212B1 (en) Disk drive device
US6381204B1 (en) Power save mode control method and storage unit
EP1966794B1 (fr) Procede d'exploitation d'un dispositif d'enregistrement de donnees
US6804183B2 (en) Rotation control method for controlling rotation of media having zones in radial direction and employing ZCAV system, and storage apparatus using the rotation control method
US6633523B1 (en) Optical memory apparatus and focus servo control method
WO2007060579A1 (fr) Systeme et procede pour minimiser la dissipation de puissance lors de l'enregistrement de donnees sur un disque optique
US6628575B1 (en) Track jump method for ZCAV system and storage apparatus employing ZCAV system
US7082086B2 (en) Disc apparatus
US20050078567A1 (en) Method of adaptively controlling sled home-in mode and disc drive using the same
JP4349184B2 (ja) ディスクドライブ装置、トラックジャンプ方法
US20030061000A1 (en) Method and system for performing a track search in an optical storage system
KR20010101554A (ko) 광디스크 재생장치
JP5157820B2 (ja) 光ディスク装置
US20040156287A1 (en) Method of accelerating a track-following process for an optical drive
JP2000311341A (ja) 光学的情報記録再生装置
JP2001067707A (ja) レーザ出力装置、及びディスクドライブ装置
JP2005317154A (ja) 再生装置、ゲイン調整方法
JPH11162116A (ja) 光ディスク
JPH06208753A (ja) 光カード記録再生装置

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200680043969.0

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2006821469

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2008541862

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 3208/CHENP/2008

Country of ref document: IN

WWE Wipo information: entry into national phase

Ref document number: 1020087015320

Country of ref document: KR

WWP Wipo information: published in national office

Ref document number: 2006821469

Country of ref document: EP