CN101546584B - Track seeking servo control method and information playing device - Google Patents
Track seeking servo control method and information playing device Download PDFInfo
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- CN101546584B CN101546584B CN200810089832XA CN200810089832A CN101546584B CN 101546584 B CN101546584 B CN 101546584B CN 200810089832X A CN200810089832X A CN 200810089832XA CN 200810089832 A CN200810089832 A CN 200810089832A CN 101546584 B CN101546584 B CN 101546584B
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Abstract
The invention relates to a track seeking servo control method, which comprises the following steps: driving a track seeking drive in a state that a carriage motor is turned off, and reading out information on an optical disc; and if preset information is acquired from the read-out information on the optical disc, starting servo control after the track seeking is successful. The invention also provides an information playing device. In the step of performing the track seeking by the track seeking driver, the carriage motor is set in an off state to prevent the carriage motor from driving an optical head to run away, reduce the power consumption, and simultaneously prevent the optical disc from being popped off and falling to the ground in a vehicle-mounted optical disc driving system.
Description
Technical field
The present invention relates to a kind of track seeking servo control method and information play apparatus.
Background technology
In disk driving system, behind loading optical disk, need be to having or not recorded information to judge on disc types and the CD, only under discernible disc types and recorded information condition, CD can correctly be play.
Prior art discloses a kind of method of judging disc types, 1 is described in detail with reference to the accompanying drawings:
At first, power-on, execution in step S1 allows to insert CD; Does execution in step S2 judge the optical disc reproducing position of CD in regulation? if, execution in step S15; If not, do not have loading optical disk, execution in step S3 shows on display and does not insert compact disc states; Execution in step S4 has judged whether that dish inserts, if do not have, shows no plate-like attitude; By the time insert after the CD, execution in step S5, driving control unit drives the load units loading optical disk; Execution in step S6 judges whether sale at reduced prices finishes, and if not, detects the loading optical disk position, finishes until sale at reduced prices; Execution in step S7 stops sale at reduced prices; Execution in step S8, the no dish on the cancellation display shows.
Then, execution in step S9, beginning disc types identification treatment step; Execution in step S10 judges whether disc types identification is successful, if success, execution in step S14; If unsuccessful, execution in step S11 adds 1 with disc types identification step variable i; Execution in step S12 judges whether disc types identification step variable i reaches default value, if also do not reach, in order to repeat the disc types identification step, execution in step S9 is until the success of identification disc types; If reach default value, disc types identification is still unsuccessful, and execution in step S13 shows error message on display, execution in step S21 then, and powered-down finishes to read dish.
If in the success of step S10 optical disc recognition step, execution in step S14, microprocessor registration disc types identifying information is to storer; When judging that in step S2 CD is in regulation optical disc reproducing position; Execution in step S15, microprocessor read the disc types identifying information that is stored in the there from storer, execution in step S16 then, and microprocessor reads the regeneration condition parameter information according to the disc types identifying information from storer, transmits and stores signal processor into.
Execution in step S17, the kind of the CD of the current loading of demonstration in display at step S18, shows standby condition; At step S19, wait for that the user imports activation bit, until operation signal is arranged; Execution in step S20 carries out the processing corresponding with operation signal, if powered-down, all carry out end.
In opening the Japanese patent application of 2001-256716, the spy can also find more information relevant with technique scheme.
Whether in technique scheme, CD is judged the kind of CD when inserting, and promptly carries out playback action after confirming as the video disc that can play, but can discern the information that whether has write down information or record on the CD in the technique scheme do not judge.
Prior art is improved above-mentioned technology, a kind of track seeking servo control method of judging on the CD that information on recorded information whether and the CD is whether discernible is disclosed, with reference to Fig. 3, execution in step S31 at first, microprocessor sends opens the drive command that tracks, and carries motor simultaneously and closes; Execution in step S32, the driver drives that tracks optical head reads in CD track number, and this track number is sent to microprocessor, in the driver drives optical head that tracks, carries motor and opens; Execution in step S33, microprocessor is compared the track number of this time acquisition with the critical value that is preset in microprocessor internal, if this track number is less than critical value, then execution in step S34 tracks successfully, the servocontrol after the success that begins to track; If this track number is greater than critical value, execution in step S35 then, carry out number of times and judge, promptly judge whether to surpass the pre-determined number that is preset at microprocessor internal, if "No", the microprocessor instructs driver that tracks reads in CD track number (S32) once more, repeat above-mentioned steps, until in pre-determined number, obtaining the track number, if the track number is all greater than critical value in pre-determined number less than critical value, then execution in step S36 stops tracking servocontrol.
In technique scheme, in the driver drives optical head that tracks, carry motor and be in opening, if the CD information that do not write down or write down can not discern, carry motor and can drive optical head and walk cruelly, increase power consumption; Simultaneously, walk cruelly in the process also and may the CD mistake be ejected lead agency carrying motor, in the vehicle optical disk drive system, can make the CD bullet land face.
Simultaneously, in technique scheme, adopt the track number of bare headed process in the schedule time to compare to judge whether the driver that tracks tracks successfully with critical value, judge by accident occurring easily in some cases, can cause that optical head walks cruelly.
Summary of the invention
The problem that the present invention solves provides a kind of determination methods and device thereof as a result of tracking, and prevents to carry motor drive optical head and walks cruelly.
For addressing the above problem, the invention provides a kind of track seeking servo control method, described method be have from the optical disc information record surface read optical disc information optical head, drive carrying motor and movably object lens being remained on the used method of playing device of the driver that tracks in the optical head of this optical head, comprise: carrying the described driver that tracks of driving under the motor closed condition, the information of reading described CD; If when from the information of the described CD read, obtaining predetermined information, the servocontrol after the success that begins to track.
Alternatively, described carrying carried motor and do not had driving electric to supply with when motor is in closed condition.
Alternatively, do not obtaining under the situation of described predetermined information, repeating described driver drives step and the optical disc information read step of tracking.
Alternatively, still can not obtain under the situation of described predetermined information after described track the driver drives step and the described optical disc information read step of pre-determined number repeating, stop tracking servocontrol.
Alternatively, described predetermined information is the identifying information of described CD.
Correspondingly, the present invention also provides a kind of information play apparatus, comprising: optical head is used for reading optical disc information from the optical disc information record surface; Carry motor, be used to drive the motor that carries of optical head; The driver that tracks is used for movably objective lens being remained in the optical head; Also comprise: carry motor control unit, be used to control described opening and closing of carrying motor; The driver control that tracks unit is used for driving the described driver that tracks under the motor closed condition described carrying, to read the information of described CD; Control module is used to control, if when from the information of the described CD read, obtaining predetermined information, and the servocontrol after the success that begins to track.
Alternatively, described carrying carried motor control unit control and carried motor and do not have driving electric to supply with when motor is in closed condition.
Alternatively, described control module also is used for not obtaining under the situation of described predetermined information, controls the described driver control unit that tracks to repeat to drive the described driver that tracks, the information of reading described CD.
Alternatively, described control module also is used in described multiplicity greater than pre-determined number, and still can not obtain under the situation of described predetermined information, finishes to track servocontrol.
Alternatively, described predetermined information is the identifying information of described CD.
Compared with prior art, the technical program has the following advantages: by in the servocontrol process that tracks, to carry motor (carriage motor) and be changed to the state of closing (off), preventing to carry motor drive optical head walks cruelly, reduced power consumption, simultaneously in the vehicle optical disk drive system, prevented that CD is landed face by bullet.
The technical program adds in disk driving system carries the motor channel selector, in the driver that tracks tracks process, will carry motor and close, and prevent to carry motor drive optical head and walk cruelly, reduce power consumption, simultaneously in the vehicle optical disk drive system, prevented that CD is landed face by bullet.
The technical program does not have the servocontrol that tracks under the driving electric supply condition carrying motor, prevents to carry motor and drives optical head and walk cruelly, has reduced power consumption, simultaneously in the vehicle optical disk drive system, has prevented that CD is landed face by bullet.
Whether the technical program is judged the whether success that tracks by the identifying information that adopts CD, avoid adopting the judgement of prior art to track occurring erroneous judgement easily in the successful methods and will carry motor and open, and causes that optical head walks cruelly.
Description of drawings
Fig. 1 to Fig. 2 is the optical disc identified method flow synoptic diagram that reads in of prior art;
Fig. 3 is the schematic flow sheet of the track seeking servo control method of prior art;
Fig. 4 is the module diagram of the information play apparatus of one embodiment of the present of invention;
Fig. 5 is the internal module structural representation of the control module of one embodiment of the present of invention;
Fig. 6 is the information play apparatus of one embodiment of the present of invention;
Fig. 7 is the information play apparatus of one embodiment of the present of invention;
Fig. 8 is the schematic flow sheet of an embodiment of track seeking servo control method of the present invention;
Fig. 9 (a) is that track waveform, (b) of drive signal Std is that the driver that tracks tracks when judging, carries the waveform of motor drive signal Smd, (c) carries motor drive signal Smd when being normal play waveform.
Embodiment
The present invention is by in the servocontrol process that tracks, to carry motor (carriage motor) and be changed to the state of closing (off), and prevent to carry motor drive optical head and walk cruelly, reduce power consumption, simultaneously in the vehicle optical disk drive system, prevented that CD is landed face by bullet.
The present invention adds in disk driving system and carries the motor channel selector, in the driver that tracks tracks process, will carry motor and close, and prevent to carry motor drive optical head and walk cruelly, reduce power consumption, simultaneously in the vehicle optical disk drive system, prevented that CD is landed face by bullet.
The present invention does not have the servocontrol that tracks under the driving electric supply condition carrying motor, prevents to carry motor and drives optical head and walk cruelly, has reduced power consumption, simultaneously in the vehicle optical disk drive system, has prevented that CD is landed face by bullet.
Whether the present invention judges the whether success that tracks by the identifying information that adopts CD, avoid adopting the judgement of prior art to track occurring erroneous judgement easily in the successful methods and will carry motor and open, and causes that optical head walks cruelly.
The present invention at first provides a kind of embodiment of information play apparatus, and the module diagram with reference to Fig. 4 provides information play apparatus of the present invention comprises: optical head 1 is used for reading optical disc information from the optical disc information record surface; Carry motor 8, be used to drive the motor that carries of optical head; The driver 101 that tracks is used for movably objective lens being remained in the optical head; Also comprise: carry motor control unit 102, be used to control described opening and closing of carrying motor 8; The driver control that tracks unit 103 is used for driving the described driver that tracks under motor 8 closed conditions described carrying, to read the information of described CD; Control module 104 is used to control, if when from the information of the described CD read, obtaining predetermined information, and the servocontrol after the success that begins to track.
Described carrying carried motor control unit 102 control and carried motor 8 and do not have driving electric to supply with when motor 8 is in closed condition.
Fig. 5 provides the internal module of control module 104, and described control module 104 further comprises:
Obtain check information unit 105, be used for carrying the check information that motor 8 cuts out the back, obtains optical disc information;
The judgement of comparing with pre-determined number of number of times judging unit 107, the number of times that is used for that check information is compared with predetermined information.Described pre-determined number is 3 to 10 times, and relatively the pre-determined number of You Huaing is 4 to 8 times, can be 5 times, 6 times, 7 times.
If the result of number of times judging unit 107 is not for reaching pre-determined number, control module 104 repeats to drive the described driver 101 that tracks and reads the information of described CD, obtains check information, judges whether check information is consistent with predetermined information.If after reaching pre-determined number, check information and predetermined information are still inconsistent, illustrate still to obtain predetermined information, stop tracking servocontrol.
In actual applications, described motor control unit 102, the driver control that tracks unit 103 and the control module 104 of carrying is integrated in the microprocessor usually.
Above-mentioned predetermined information is the identifying information of described CD.For the CD CD, described predetermined information is the Q sub-code frame of CD, and the described check information unit 105 that obtains further comprises: the separative element and the screening unit that is used for filtering out from the control-code display signal check information that are used for isolating from optical disc information the control-code display signal.
For the DVD CD, described predetermined information is an identifier, and the described check information unit 105 that obtains further comprises: be used for the screening unit isolating the separative element of management information and be used for filtering out from management information check information from optical disc information.
Fig. 6 provides the circuit module of the information play apparatus of one embodiment of the present of invention, comprising:
Carry bare headed support 5, be used for support of optical 1, and drive optical head 1 along guide rail 12 moving radially to CD 4.The above-mentioned driver 102 that tracks is positioned at and carries bare headed support 5 and be used to drive optical head 1 and read CD 4 information.
Amplifying unit 7 comprises amplifier 7a, 7b, 7c and 7d, be used for seek burnt driver (not shown), the driver (not shown) that tracks, the drive signal of carrying motor 8, rotation motor 13 amplify.
Carry motor 8, be used for driving and carry bare headed support 5 and drive optical heads 1 and move along guide rail 12.
D/A conversion unit 10 is used for the Voice ﹠ Video conversion of signals of signal processor 9 is become simulating signal and mails to sound equipment and display respectively.
Carry bare headed stent range transducers (carriage home position sensing device) 23, be used for detecting and carry bare headed support 5 positions, describedly carry bare headed stent range transducers 23 and comprise button 23a, described button 23a is used for judging whether carry bare headed support 5 is in 4 interior weeks of CD.
Servo equalizer unit SE (servo equalizer), described servo equalizer unit SE is used for according to different frequencies, regulates amplification, further comprises:
Focus on balanced device 17, be used for, regulate the amplification of focus servosystem according to different frequencies;
Rotation motor control module 18 is used to control the rotation of rotation motor 13;
The balanced device (tracking equalizer) 3 that tracks is used for according to different frequencies, regulates the amplification of the servo-drive system that tracks;
The control module 15 that tracks is used for the control driver that tracks;
Carry motor balanced device 22, be used for according to different frequencies, motor servo-drive system (carriage servo) amplification is carried in adjusting, the described motor servo-drive system of carrying comprises amplifier 7c, switch element 16 among Fig. 7, carries motor balanced device 22 and the balanced device 3 etc. that tracks, and motor servo-drive system path is carried in described switch element 16 controls;
Wherein, in the switch element 16 among Fig. 6 carry motor channel selector 20 receive microprocessors 14 inside the control module that carries motor control unit 101 104 carry motor signal Svz, under this signal, carry the 20 closed or disconnections of motor channel selector, if carrying motor channel selector 20 disconnects, then carrying motor 8 does not have driving electric to supply with, and carry motor 8 and close this moment.Carry the drive signal Sa that motor control switch 21 receives the control module that carries motor control unit 101 104 of microprocessor 14 inside, under drive signal Sa effect, carry 21 dozens of motor control switch to drive signal Sa one side, under no drive signal Sa effect, carry 21 dozens of motor control switch to carrying bare headed bracket signal Scq one side.
Simultaneously, disk driving system among the present invention can also be out of shape to some extent, as shown in Figure 7, described switch element 16 only comprises and carries motor control switch 21, i.e. control is carried motor control switch 21 and controlled by the motor signal Svz that carries of the control module that carries motor control unit 101 104 of microprocessor 14 inside, carrying under the motor signal Svz, carry motor control switch 21 place in the middle of or beat to carrying bare headed bracket signal Scq one side, promptly carry motor servo-drive system path and be in disconnection or closure state, under the drive signal Sa effect of the control module 104 of microprocessor 14 inside, carry 21 dozens of motor control switch to drive signal Sa one side.
Other parts structure among Fig. 7 and information transmission are identical with information play apparatus among Fig. 6, do not add at this and give unnecessary details.
Provide the process that the driver that tracks that adopts above-mentioned Fig. 6 disc drives circuit module tracks and starts below:
After will carrying motor 8 and closing, the driver that tracks starts action, and in the meantime, the internal drive that tracks is carried out self-coordination so that can follow the tracks of track in the CD, simultaneously, the check information unit 105 that obtains of microprocessor 14 inside obtains check information in the optical disc information; Then, the judging unit 106 of microprocessor 14 inside judges in pre-determined number whether check information is consistent with predetermined information; Wherein, each judgement is finished in the given time.Described optical disc information is through the optical disc information of handling, such as processing such as process amplification, denoising, analog to digital conversion before being sent to microprocessor 14.
If in pre-determined number, obtain predetermined information, the driver that tracks tracks successfully, control module 104 in the microprocessor 14 sends to switch element 16 and carries motor signal Svz, closure is carried motor channel selector 20, motor 8 is carried in unlatching, at this moment, carry motor servo-drive system path closure, the servocontrol after the success that tracks; If in pre-determined number, all do not obtain under the predetermined information situation, then stop tracking servocontrol.In the present embodiment, control module 104 in the microprocessor 14 sends to switch element 16 and carries motor signal Svz and drive signal Sa, closure is carried motor channel selector 20, simultaneously, carry motor control switch 21 and beat one side to drive signal Sa by original beating to carrying bare headed bracket signal Scq one side commentaries on classics, motor 8 is carried in unlatching, it is stronger that drive signal Sa ratio carries bare headed bracket signal Scq, under stronger drive signal Sa effect, carry motor 8 and will carry the interior week that bare headed support 5 is pulled to CD 4, the transducing signal Shq that carries bare headed stent range transducers 23 transmissions is to microprocessor 14, and CDs are ejected in microprocessor 14 controls.In other embodiments, if in pre-determined number, all do not obtain not eject CD under the predetermined information situation, only on display, show no CD information.
After the servocontrol success that tracks, can carry out a series of adjustment, read optical disc information then,, provide the process that the disc drives circuit module that adopts Fig. 6 is play optical disc information below for the co-ordination situation of each circuit module of describing Fig. 6 or Fig. 7 in detail.
At first, CD 4 is loaded on the rotating disc (not shown) of rotation motor 13, and optical head 1 emission light beam is to the information recording surface of CD 4.
It is optical disc information that optical head 1 is converted to electric signal Spp with the folded light beam of the information recording surface of CD, and this electric signal Spp is sent to prime amplifier 2.
Next, prime amplifier 2 is according to the electric signal Spp of input, generation is reflected in perpendicular to the focus error signal of the position deviation between the position of beam focusing position on the information recording surface direction and above-mentioned information recording surface (focus error signal) Sfe, and this signal is sent to focusing balanced device 2.
Optical disc information after prime amplifier 2 also will amplify sends to signal processor 9 with the form of information regeneration signal (reproductionsignal) Srf.
D/A conversion unit 10 converts output signal So to simulating signal, be divided into left output signal Sol that is used for left side output and the right output signal Sor that is used for the right output, and these signals are exported to left speaker (not shown) and right loudspeaker (not shown).
Simultaneously, the 17 couples of focus error signal Sfe of focusing balanced device in the servo equalizer unit SE carry out the amplification adjustment, produce focus control signal Sfq to drive focus driver and to output signal to amplifier 7a.
On the other hand, the rotation motor control module 18 in the servo equalizer unit SE produces the rotation of rotation control signal Sss with control rotation motor 13 according to rotation control signal Ssc, and exports amplifier 7d to.
Next, 3 pairs in the balanced device that tracks in the servo equalizer unit SE rub-out signal Ste that tracks carries out the amplification adjustment, produce drive control signal Stq, with track driver and carry motor 8 of driving, and the balanced device 3 that tracks sends drive control signal Stq respectively to tracking control module 15 and carry motor balanced device 22.
The control module 15 that tracks produces tracking control signals therefor Stc with the control driving of driver that tracks according to drive control signal Stq, and exports amplifier 7b to.
Then, amplifier 7b amplifies tracking control signals therefor Stc, and tracking control signals therefor Stc changes the drive signal Std that tracks into, with the track driving of driver of control.
On the other hand, carry motor balanced device 22 and produce according to drive control signal Stq and carry bare headed bracket signal Scq and carry motor 8, and output is carried bare headed bracket signal Scq to switch element 16 with driving.Through carrying motor channel selector 20, carry bare headed bracket signal Scq and become and carry switching signal Ssw; Through carrying motor control switch 21, convert to and carry motor control signal Scc then.
Then, amplifier 7c amplifies and to carry motor control signal Scc, carries motor control signal Scc and changes into and carry motor drive signal Smd, the driving of carrying motor 8 with control.
Whole control signal processor 9 and servo equalizer unit SE in the control signal Smc of microprocessor 14 between received signal processor 9 and servo equalizer unit SE.
The disc drives circuit module mode of operation of Fig. 7 and Fig. 6's is similar, does not add detailed description here.
The present invention carries motor control switch 21 by carry motor signal Svz disconnection by microprocessor 14 transmissions in the driver that tracks tracks process, close and carry motor 8, having prevented to carry motor 8 drive optical heads 1 walks cruelly, reduced power consumption, simultaneously in the vehicle optical disk drive system, prevented that CD is landed face by bullet.
The motor channel selector is carried in the adding of the present invention in disk driving system, in the driver that tracks tracks process, will carry motor and close, and prevent to carry motor drive optical head and walk cruelly, reduce power consumption, simultaneously in the vehicle optical disk drive system, prevented that CD is landed face by bullet.
Fig. 8 provides the schematic flow sheet of a specific embodiment of the present invention, (a) provides in the waveform, Fig. 9 of the drive signal Std that tracks (b) and provides the driver that tracks and track when judging among Fig. 9, and waveform, Fig. 9 (c) of carrying motor drive signal Smd carry motor drive signal Smd waveform when providing normal play.Describe the servocontrol process that tracks of the present invention in detail below in conjunction with Fig. 6 or Fig. 7, Fig. 8 and Fig. 9.
Execution in step S21, microprocessor 14 sends the order of opening the driver that tracks.
Then, execution in step S22, the motor control unit 101 that carries of microprocessor 14 inside makes and carries motor 8 and close by carrying motor signal Svz, be that the motor control switch 21 that carries that carries among Fig. 6 among 20 disconnections of motor channel selector or Fig. 7 places the centre, carry the waveform of motor drive signal Smd this moment shown in (b) among Fig. 9.
Under the order that the driver that will track starts, the driver that tracks starts, and this step is the egosyntonic process of driver that tracks, and the driver that tracks is adjusted moving of self according to the offset of CD, comprises translational speed, direction etc.
Execution in step S24, optical head reads optical disc information, specifically comprise: it is above-mentioned electric signal Spp that optical head 1 reads data of optical disk, optical head 1 is sent to prime amplifier 2 with electric signal Spp and amplifies, prime amplifier 2 produces information regeneration signal Srf and is sent to signal processor 9, processing such as the digitizing of process signal processor 9, modified tone, correction, the optical disc information after signal processor 9 will be handled by control signal Smc then is sent to microprocessor 14.
Execution in step S25, obtain the check information in the optical disc information, for the CD CD, the described check information process of obtaining in the optical disc information comprises: isolate the control-code display signal from optical disc information, from the control-code display signal, filter out the Q sub-code frame, for the DVD CD, comprise and from CD, isolate management information, from management information, filter out the identifier of CD.
Execution in step S26, the judging unit 103 of microprocessor 14 judge the predetermined information of check information and microprocessor 14 inside, and whether number of times consistent and that will judge is sent to the number of times judging unit 104 conduct data first time.
The judgement check information step (S26) of described judging unit 103 is to carry out in the given time, schedule time scope of the present invention is 200 to 1000ms, for the CD CD, can obtain 15 to 75 sectors of data at this moment, if the schedule time is 500ms, it is consistent with predetermined information that microprocessor 14 is judged check information at 300ms, get access to predetermined information, the servocontrol success that tracks is described, then microprocessor 14 is no longer judged whether consistent step (S26) of check information and predetermined information, directly turn to step S27, will carry motor and open.
If do not get access to predetermined information at the fixed time, the driver that tracks is proceeded the oneself and is adjusted under the order of microprocessor 14, to drive the track that optical head 1 is sought on the CD 4, then carry out number of times determining step S29, judgement is compared check information with predetermined information number of times is compared with subscribing number of times, and described pre-determined number is 3 to 10 times.Here suppose that pre-determined number is 5 times, because this is for the first time check information and predetermined information to be compared, number of times determining step S28 result is a "No", turn to step S24, continue to read optical disc information, obtain check information (S25), microprocessor 14 is judged control signal and predetermined information whether consistent (S26), if after reaching pre-determined number, the built-in predetermined information of check information and microprocessor 14 is all inconsistent, promptly all can not get access to predetermined information, the driver that then the tracks failure that tracks, such as under the unreadable situation of information of CD 4 no record information or record, the failure that tracks occurring, then turn to execution in step S30, stop tracking servocontrol.
In the present embodiment, when stopping tracking servocontrol, carry motor 8 if open, for the disc drives circuit module among Fig. 6, following operation: the control module that carries motor control unit 101 104 of microprocessor 14 carries motor signal Svz to carrying 20 transmissions of motor channel selector, carry motor channel selector 20 closures, the control module that carries motor control unit 101 104 of microprocessor 14 sends drive signal Sa to carrying motor control switch 21, carry 21 dozens of motor control switch to drive signal Sa one side, carry motor and open; For the disc drives circuit module among Fig. 7, following operation: the control module 104 of microprocessor 14 sends drive signal Sa to carrying motor control switch 21, carries 21 dozens of motor control switch to drive signal Sa one side, carries motor and opens; Execution in step S31 ejects CD 4.
If in pre-determined number, certain reads in data cell judges that the built-in predetermined information of check information and microprocessor 14 is consistent, and microprocessor 14 can be read optical disc information, and promptly judged result is that CD 4 has recorded information, execution in step S27 then, the servocontrol after the success that tracks.
In the present embodiment, servocontrol after the success that tracks is carried motor 8 if open, for the disc drives circuit module among Fig. 6, following operation: first control module of microprocessor 14 carries motor signal Svz to carrying 20 transmissions of motor channel selector, carrying motor control switch 21 has been positioned at and has carried bare headed bracket signal Scq one side, then carry the servo path closure of motor, carry motor 8 and open; For the disc drives circuit module among Fig. 7, following operation: first control module of microprocessor 14 carries motor signal Svz to carrying motor control switch 21 transmissions, carry 21 dozens of motor control switch to carrying bare headed bracket signal Scq one side, then track servocontrol after the success, carry the waveform of motor drive signal Smd this moment shown in (c) among Fig. 9.
The present invention does not have the servocontrol that tracks under the driving electric supply condition carrying motor, prevents to carry motor and drives optical head and walk cruelly, has reduced power consumption, simultaneously in the vehicle optical disk drive system, has prevented that CD is landed face by bullet.
Whether the present invention judges the whether success that tracks by the identifying information that adopts CD, avoid adopting the judgement of prior art to track occurring erroneous judgement easily in the successful methods and will carry motor and open, and causes that optical head walks cruelly.
Though oneself discloses the present invention as above with preferred embodiment, the present invention is defined in this.Any those skilled in the art without departing from the spirit and scope of the present invention, all can do various changes and modification, so protection scope of the present invention should be as the criterion with claim institute restricted portion.
Claims (8)
1. track seeking servo control method, described method be have from the optical disc information record surface read optical disc information optical head, drive carrying motor and movably object lens being remained on the used method of playing device of the driver that tracks in the optical head of this optical head, it is characterized in that, comprising:
Transmission begins to track to close after the drive command and carries motor;
Carrying the described driver that tracks of driving under the motor closed condition, the information of reading described CD;
If when obtaining predetermined information from the information of the described CD read, described predetermined information is the identifying information of described CD, starts and carry motor, the servocontrol after the success that begins to track.
2. track seeking servo control method according to claim 1 is characterized in that, described carrying carried motor and do not had driving electric to supply with when motor is in closed condition.
3. track seeking servo control method according to claim 2 is characterized in that, is not obtaining under the situation of described predetermined information, repeats the described driver drives step and the optical disc information read step of tracking of pre-determined number.
4. track seeking servo control method according to claim 3, it is characterized in that, still can not obtain under the situation of described predetermined information after described track the driver drives step and the described optical disc information read step of pre-determined number repeating, stop tracking servocontrol.
5. information play apparatus comprises:
Optical head is used for reading optical disc information from the optical disc information record surface;
Carry motor, be used to drive the motor that carries of optical head;
The driver that tracks is used for movably objective lens being remained in the optical head;
It is characterized in that, also comprise:
Carry motor control unit, being used for controlling after transmission begins to track drive command the described motor that carries closes, if the described motor that carries of control is opened when obtaining predetermined information from the information of the described CD read, described predetermined information is the identifying information of described CD;
The driver control that tracks unit is used for driving the described driver that tracks under the motor closed condition described carrying, to read the information of described CD;
Control module is used to control, if when from the information of the described CD read, obtaining predetermined information, and the servocontrol after the success that begins to track.
6. information play apparatus according to claim 5 is characterized in that, described carrying carried motor control unit control and carried motor and do not have driving electric to supply with when motor is in closed condition.
7. information play apparatus according to claim 6, it is characterized in that, described control module also is used for not obtaining under the situation of described predetermined information, controls the described driver control unit that tracks to repeat the described driver that tracks of driving of pre-determined number, the information of reading described CD.
8. information play apparatus according to claim 7 is characterized in that, also comprises: described control module also is used in described multiplicity greater than pre-determined number, and still can not obtain under the situation of described predetermined information, finishes to track servocontrol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810089832XA CN101546584B (en) | 2008-03-28 | 2008-03-28 | Track seeking servo control method and information playing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810089832XA CN101546584B (en) | 2008-03-28 | 2008-03-28 | Track seeking servo control method and information playing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101546584A CN101546584A (en) | 2009-09-30 |
| CN101546584B true CN101546584B (en) | 2011-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810089832XA Expired - Fee Related CN101546584B (en) | 2008-03-28 | 2008-03-28 | Track seeking servo control method and information playing device |
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| Country | Link |
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| CN (1) | CN101546584B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083616A (en) * | 1992-04-06 | 1994-03-09 | 三星电子株式会社 | The early stage braking and driving method and the circuit of disc system |
| CN1702749A (en) * | 2004-05-24 | 2005-11-30 | 建兴电子科技股份有限公司 | Method for restarting servo control system |
| EP1855279A1 (en) * | 2005-02-28 | 2007-11-14 | Matsushita Electric Industrial Co., Ltd. | Recording medium reproducing device |
-
2008
- 2008-03-28 CN CN200810089832XA patent/CN101546584B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083616A (en) * | 1992-04-06 | 1994-03-09 | 三星电子株式会社 | The early stage braking and driving method and the circuit of disc system |
| CN1702749A (en) * | 2004-05-24 | 2005-11-30 | 建兴电子科技股份有限公司 | Method for restarting servo control system |
| EP1855279A1 (en) * | 2005-02-28 | 2007-11-14 | Matsushita Electric Industrial Co., Ltd. | Recording medium reproducing device |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2001-209954A 2001.08.03 |
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|---|---|
| CN101546584A (en) | 2009-09-30 |
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