CN1147858C - Tracking controller - Google Patents
Tracking controllerInfo
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- CN1147858C CN1147858C CNB981020917A CN98102091A CN1147858C CN 1147858 C CN1147858 C CN 1147858C CN B981020917 A CNB981020917 A CN B981020917A CN 98102091 A CN98102091 A CN 98102091A CN 1147858 C CN1147858 C CN 1147858C
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- tracking error
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- adjusting gear
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Abstract
The invention provides a tracking control unit capable of stably adjusting the off-set and balance of tracking error signal and acculately adjusting in a short time within one second. An operation parameter corresponding to the type of disk is set, in that situation the tracking servomotor is put to off state, and the light beam is exited in vibration in the radial direction of disk (step S5); after that the tracking error signal is integrated several times in a prescribed time and in a prescribed area as well (step S8-S12), and the average is calculated (step S14). Control is executed so that this value is settled within a prescribed range (steps S16, S17) and after that the tracking servomotor is put to be on.
Description
Technical field
The present invention relates in the optical recording/reproduction apparatus of the dish such, adjust automatically deviation and the tracking means of balance (they are called as the state of tracking error) and the dish devices such as MD player that use it of tracking error signal with predetermined piece chronomere record, reproduction digital data signal to MD (mini disk), in more detail, relate to the tracking means that the mensuration precision that makes tracking error is improved.
Background technology
Generally speaking, in this optical recording/reproduction apparatus, during record, the output power of laser that light beam spot is provided to dish (below call laser power) and the incompatible multistage adjustment of carrying out that matches by the specified wattage of the kind of dish, playback time, the multiple magneto-optic disks different for reflectivity come multistage change laser power, are suitable in order to make playback light, come handoff gain, carry out this switching at every turn and all will adjust deviation.At this moment, consider the interchangeability with other devices, must correctly adjust the deviation of tracking error signal and balance etc. and adjust object.
In the prior art, as when writing down, automatically adjusting the deviation of tracking error signal and the method for balance, following method is disclosed: promptly, when laser power is risen, data necessary can disappear, therefore, when being connected, focus servo mechanism disconnects under the state of tracking servo, at the last frequency excitation vibration executive component of tracking direction (dish radial direction) with 200Hz, thus, light beam spot is for example crossed ± several information tracks, adjusted the deviation and the balance of tracking error signal, become identical from the peak value up and down of the resulting replay signal of this reflected light so that make.
And, also have such method: after disconnecting tracking servo, be that unit carries out information track and jumps with the information track, then, connect tracking servo (the open communique spy of Jap.P. opens flat 7-225955) and do not destroy data necessary.
But, in above-mentioned existing method, owing to be the data pick-up by carrying out peak value and relatively they both carry out the adjustment that needs, therefore, be used to carry out under the dirty situations such as (adhering to of dust) of error, surperficial runout and dish of the A/D converter that the reference voltage of the mensuration of tracking error causes because of temperature variation etc. the problem that exists the precision correctness measured to suffer damage in existence.
In the conventional method, also exist can not carry out the A/D conversion continuously and in processing time taking problem.In the MD player, the user once carries out the switch of power switch and record or power switch and playback by " once pressing the button " function in record or playback, when such device is main flow, just requires certainly and can in instantaneous, write down or reset.But in reality, the such highdensity dish of MD is along with the type of dish and manufacturer is different, and there is very big deviation in product, then needs the project adjusted a lot, and the adjustment time separately is elongated and become the degree that can not ignore.Particularly, the tracking adjustment time will spend several seconds to tens seconds under adjusting difficulty and can not adjusting or adjust than long situation.Therefore, can carry out certain adjustment with regard to expectation in the prior art and adjust with high precision and short time.
Summary of the invention
In view of the above problems, the dish device that the purpose of this invention is to provide a kind of follow-up control apparatus and have this follow-up control apparatus, this follow-up control apparatus can be stablized deviation and the balance of adjusting tracking error signal, adjusts accurately in the interior short time at one second.
To achieve these goals, in the present invention, set the corresponding driving parameters of type with dish, under this state, make tracking servo become off-state and come excited oscillation light beam on the radial direction of dish, in the schedule time then He in the presumptive area, tracking error signal is carried out repeatedly integration, calculate its mean value, control so that this value falls into preset range, then, tracking servo is connected.
That is, according to the present invention, the follow-up control apparatus that provides a kind of optical disc apparatus to use can write down or replay signal by illumination beam on CD, it is characterized in that, comprising:
Discriminating gear, the type of the CD that differentiation should drive are ROM or RAM;
Parameter setting apparatus, according to the type of the CD of differentiating by above-mentioned discriminating gear,, then can set predetermined driving parameters to the ROM zone if type is ROM, if type is RAM, then can set different predetermined drive parameter respectively with ram region to the ROM zone;
Detect adjusting gear, can be on the basis of the predetermined driving parameters that sets by the above-mentioned parameter setting device, detect the tracking error integrated signal to carrying out integration, simultaneously, adjust the state of above-mentioned tracking error signal by the resultant tracking error signal of the signal of resetting from above-mentioned CD;
The excited oscillation device in order to detect above-mentioned tracking error signal, carries out positive energize vibration and negative energize vibration to above-mentioned light beam;
The tracking error arithmetic unit, tracking error integrated signal to detected continuous predetermined quantity in the zone that should measure after vibration of the positive energize that undertaken by above-mentioned excited oscillation device or negative energize vibration averages computing, exports average tracking error intergal signal;
Control device is according to the above-mentioned detection adjusting gear of being controlled the tracing positional that should adjust above-mentioned light beam by the above-mentioned average tracking error intergal signal of above-mentioned tracking error arithmetic unit institute computing.
According to the present invention, the follow-up control apparatus that provides a kind of optical disc apparatus to use can write down or replay signal by illumination beam on CD, it is characterized in that, comprising:
Detect adjusting gear, type according to the CD that should drive is that ROM or RAM come with different parameter detecting by the resulting tracking error integrated signal with the tracking error signal integration of the signal of being reset from above-mentioned CD, simultaneously, can adjust the state of above-mentioned tracking error signal, it has the A/D converter of the reference voltage of the mensuration that is used to carry out above-mentioned tracking error;
The reference voltage means for correcting can be proofreaied and correct above-mentioned A/D converter reference voltage;
The tracking error arithmetic unit, after by said reference voltage correction device correction said reference voltage, tracking error integrated signal by detected predetermined quantity in the zone that should measure of above-mentioned detection adjusting gear after positive energize vibration or negative energize vibration is averaged computing, output average tracking error intergal signal;
Control device is according to controlling above-mentioned detection adjusting gear by the above-mentioned average tracking error intergal signal of above-mentioned tracking error arithmetic unit institute computing, to adjust the tracing positional of above-mentioned light beam.
According to the present invention, the follow-up control apparatus that provides a kind of optical disc apparatus to use can write down or replay signal by illumination beam on CD, it is characterized in that, comprising:
Detect adjusting gear, can detect, simultaneously, adjust the state of above-mentioned tracking error signal by the resulting tracking error integrated signal of the signal of resetting from above-mentioned CD with the tracking error signal integration;
The excited oscillation device carries out excited oscillation in order to detect above-mentioned tracking error signal;
The tracking error arithmetic unit, carry out once at least a of above positive energize vibration and negative energize vibration by above-mentioned excited oscillation device, so that above-mentioned detection adjusting gear works, moving of a direction that causes by a kind of vibration wherein, the tracking error integrated signal of the predetermined quantity that institute's continuous detecting in the mensuration zone of not returning is thereafter gone out averages computing, output average tracking error intergal signal;
Control device, carry out the above-mentioned excited oscillation and the tracking error computing of necessary number of times, so that the above-mentioned average tracking error intergal signal that is calculated by above-mentioned tracking error arithmetic unit enters in the preset range, control above-mentioned detection adjusting gear so that adjust the tracing positional of above-mentioned light beam.
According to the present invention, the follow-up control apparatus that provides a kind of optical disc apparatus to use can write down or replay signal by illumination beam on CD, it is characterized in that, comprising:
Detect adjusting gear, can detect by the resulting tracking error integrated signal of the signal of resetting from above-mentioned CD the tracking error signal integration, simultaneously, adjust the state of above-mentioned tracking error signal, it has the A/D converter of the reference voltage of the mensuration that is used to carry out above-mentioned tracking error;
The reference voltage means for correcting can be proofreaied and correct above-mentioned A/D converter reference voltage;
The tracking error arithmetic unit, after by said reference voltage correction device correction said reference voltage, carry out at least a of positive energize vibration or negative energize vibration by above-mentioned detection adjusting gear, cause moving of a direction by a kind of vibration wherein, tracking error integrated signal to detected predetermined quantity in the zone of thereafter mensuration averages computing, output average tracking error intergal signal;
Control device, carry out the above-mentioned excited oscillation and the tracking error computing of necessary number of times, so that the above-mentioned average tracking error intergal signal that is calculated by above-mentioned tracking error arithmetic unit enters in the preset range, control above-mentioned detection adjusting gear so that adjust the tracing positional of above-mentioned light beam.
According to the present invention, the follow-up control apparatus that provides a kind of optical disc apparatus to use can be that illumination beam writes down or replay signal on ROM or the CD of RAM distinguishing type in advance, it is characterized in that, comprising:
Parameter setting apparatus according to the type of above-mentioned CD, if type is ROM, then can be set predetermined driving parameters to the ROM zone, if type is RAM, then can set different predetermined drive parameter respectively with ram region to the ROM zone;
Detect adjusting gear, can be on the basis of the predetermined driving parameters that sets by the above-mentioned parameter setting device, to carrying out integration and detect the tracking error integrated signal by the resultant tracking error signal that obtains of the signal of resetting from above-mentioned CD, simultaneously, adjust the state of above-mentioned tracking error signal;
The TOC access device in order to detect above-mentioned tracking error signal, makes above-mentioned light beam jump to interior week from the periphery of above-mentioned CD, comes TOC is carried out access;
The tracking error arithmetic unit averages computing, output average tracking error intergal signal to the tracking error integrated signal of the continuous predetermined quantity that detected during the above-mentioned jump that is produced by above-mentioned TOC access device;
Control device is according to controlling above-mentioned detection adjusting gear to adjust the tracing positional of above-mentioned light beam by the above-mentioned average tracking error intergal signal of above-mentioned tracking error arithmetic unit institute computing.
According to the present invention, provide the device of the dish with any above-mentioned follow-up control apparatus.
The present invention has above-mentioned formation, use integrated value and raising to obtain the average S/N of continuous abundant data, improve the mensuration precision, this integrated value obtains like this: after carrying out excited oscillation, integration is carried out to resulting tracking error signal in this mensuration zone in the mensuration zone that selection is not returned.Integrated value and the practical necessary enough predetermined values (for example 3%) that are compared, if more than it, it is different with magneto-optic disk that the EF balance is carried out ± 1 CD), repeat mensuration and just can be appended in the predetermined value.Therefore,, provide precision, simultaneously, obtain data continuously, therefore, can finish at short notice being in such " runout " the averaging that is used for as on the peak value of integrated value.At this moment, by proofreading and correct the reference voltage of A/D converter, just can further improve the mensuration precision.When the present invention is used for the MD player, on cost and performance, can play the effect (can carry out with utmost point short time high precision) that does not have in the prior art at record or in resetting.
Description of drawings
These and other purpose, advantage and feature of the present invention will be in conjunction with the drawings to the description of embodiments of the invention and further specified.In these accompanying drawings:
The block scheme of the embodiment of the MD device for reproducing recorded (player) of the tracking means that the expression use is involved in the present invention;
The circuit diagram of the major part of the prime amplifier of presentation graphs 1;
The synoptic diagram that information track in the expression first embodiment of the present invention jumps;
Be used for illustrating the deviation of the tracking error signal of adjusting the first embodiment of the present invention and the action timing diagram of balance;
The circuit diagram of the major part of the prime amplifier of the Fig. 1 in the expression second embodiment of the present invention;
Expression is as the process flow diagram of the handling procedure in the MD player of the third embodiment of the present invention;
The first half of the process flow diagram of the process flow diagram part of presentation graphs 6 particularly;
The latter half of the process flow diagram of the process flow diagram part of presentation graphs 6 particularly;
Represent the synoptic diagram that the tracking among the embodiment of Fig. 5 of the present invention is jumped;
The sequential chart of the action when being used for illustrating the deviation of the tracking error signal of adjusting fifth embodiment of the invention and balance;
Expression is as the process flow diagram of the handling procedure in the MD player of the fifth embodiment of the present invention;
The process flow diagram of the process flow diagram part of presentation graphs 6 particularly;
Expression is as the process flow diagram of the handling procedure in the MD player of the sixth embodiment of the present invention that partly changes Figure 12 process flow diagram.
The preferred embodiments of the present invention are described below with reference to the accompanying drawings.
Preferred implementation
First embodiment
Fig. 1 is the block scheme that the MD device for reproducing recorded of tracking means involved in the present invention is used in expression, Fig. 2 is the circuit diagram of major part of the prime amplifier of presentation graphs 1, Fig. 3 is the synoptic diagram that the information track in the presentation graphs 1 jumps, and Fig. 4 is the action timing diagram when being used to illustrate the deviation of adjusting tracking error signal and balance (so-called information track position).
In Fig. 1, in dish 1, have from the inside all formed information tracks of periphery as recording medium, light picker 2 is by giving this information track application of force laser beam spot and write down optically and/or text message, acoustic information, the picture information of the predetermined format of resetting.This dish 1 rotates with CLV (constant linear velocity) by spindle drive motor 3 and motor driver/tracking focus control circuit 4 according to the signal of being read and being reset by light picker 2.Light picker 2 has overlapping device 5 and horizontal travel motor 6, and with magnetic field modulation 7 for moving integratedly.
EFM modulation/error correction/ADIP/ servo circuit 10 was encoded to record data in when record, was modulated into the EFM signal, exported to magnetic field modulation 7 by driver 7a.Circuit 10 carries out demodulation and carries out error correction decoding the EFM signal from prime amplifier 9 at playback time, simultaneously, come to control according to focus error signal FEO and tracking error signal TEO, so that the predetermined information road of 2 pairs of dishes 1 of light picker is followed the tracks of and focused on by motor driver/tracking focus control circuit 4.
Describe the formation of prime amplifier 9 in detail below with reference to Fig. 2.The signal RF1, the RF2 that import by read head amplifier 8 from light picker 2 are used as EFM signal, ADIP signal etc. through information playback signal output apparatus 21 and export to EFM modulation/error correction/ADIP/ servo circuit 10.In order to adjust the focusing balance, detect the envelope signal EFMENV of EFM signal by EFMENV testing circuit 21a, and export to the A/D converter 11a in the microcomputer 11.Output signal A～the D of 4 standalone sensors (omitting among the figure) of focus error signal detection usefulness is applied in to focusing on balance and comes computing (A+C-B-D) with differential amplifier 23F.This differential amplifier 23F+apply on the terminal by focusing on the focusing balanced voltage that balance is determined with variable resistor device 24F1,24F2.The focus error signal FE of therefore, this differential amplifier 23F output { (α (A+C)-B-D) } (α be and focus on the corresponding coefficient of balance adjustment amount).
Wherein, focusing on that balance gains with variable resistor device 28T with variable resistor device 24T1,24T2, tracking with variable resistor device 28F, tracking balance with variable resistor device 26F and focusing deviation with variable resistor device 24F1,24F2, following focusing gain all is that variable ladder and analog switch by multistage constituted.The focusing balance is carried out interlock control with two variohms, the tracking balance of variable resistor device 24F1 and 24F2 with two variohms of variable resistor device 24T1 and 24T2.
Each analog switch group of these variable resistor devices 24F, 26F, 28F, 24T, 26T, 28T is according to switching on and off selectively with the corresponding focusing balanced signal of data FBAL, the focusing gain signal FG, the focusing deviation signal TOFS that set in the register (RAM 11c) of microcomputer shown in Figure 1 11.Therefore, the resistance value multiple step format changes, and just can adjust balance (BAL), gain (G) and deviation (OFS), the balance (BAL) of following the tracks of (T) signal, gain (G) and the deviation (OFS) of focusing (F) signal.
The output signal FE of differential amplifier 23F is amplified according to focusing gain signal FG with amplifier 25F and variable resistor device 26F by focusing gain, then, adjust focusing deviation with amplifier 27F and variable resistor device 28F according to focusing deviation signal TOFS by focusing deviation.This signal is exported to the A/D converter 11a in servo circuit 10 and the microcomputer 11 as focus error signal FEO.
The polarity of output signal E, F that detects two standalone sensors (omitting among the figure) of usefulness from the tracking error signal of light picker 2 can be according to switching in direct connection or the cross connection one from the polarity selection signal TESEL of microcomputer 11 by polarity switching circuit 29.The output signal E of polarity switching circuit 29, F are applied to tracking balance with on the differential amplifier 23T, by this differential amplifier 23T and variable resistor device 24T1,24T2 according to tracking balance signal TBAL, at signal TESEL is under the direct-connected situation, generates tracking error signal (β F-E) (β is the tracking balance adjustment amount); And be under the cross-coupled situation at signal TESEL, generate tracking error signal (β E-F).
This output voltage amplifies according to following the tracks of gain signal TG with amplifier 25T and variable resistor device 26T by following the tracks of gain, then, according to focusing deviation signal TOFS deviation is adjusted with differential amplifier 27T and variable resistor device 28T by tracing deviation.This signal is exported to A/D converter 11a in servo circuit 10 and the microcomputer 11 as tracking error signal TEO.
For balance and the deviation of adjusting tracking error signal TEO, the voltage of tracking error signal TEO carries out integration by the integrating circuit 30 of working as integrating gear.Its integral voltage SE is exported to the A/D converter 11a in the microcomputer 11.Integrating circuit 30 can reset by the reset signal from microcomputer 11 after integral voltage SE measures.
Come the balance of adjustment tracking error signal TEO and the action of deviation are described below with reference to Fig. 3 and Fig. 4.At first, read necessary information on the TOC of the dish 1 that the laser beam of light picker 2 is moved, after the initial setting of the gain of having carried out laser beam and each differential amplifier etc., adjust the balance of tracking error signal TEO.In the case, shown in Fig. 3 (a) and (b) like that, in stage " 1 ", make light beam move to+information track of side in, in stage " 2 ", make light beam move to-information track of side in, in stage " 3 ", make light beam move to+information track of side in.+ side ,-side is respectively to point to peripheral direction, interior Zhou Fangxiang from present information track, be+side or-judgement of side is by the tracking error signal decision of being measured before this.N+1 shown in Figure 3, n represent the center of information track.The solid line of Fig. 3 (a) and dotted line are represented the opposite polarity waveform of tracking error signal TE, are positioned by servo circuit 10 in an information track, and the center of the bottom right of (about 700Hz or more than) is in the center of information track so that the sine wave of a ripple.
Be described in detail below with reference to Fig. 4, at first, adjust focusing deviation signal TOFS,, then, use this adjusted value, come to adjust tracking gain signal TG to become predetermined value with respect to Vref so that TE=(E-F) becomes reference voltage V ref.Then, continuing to make focus servo mechanism is on-state, simultaneously, shown in Fig. 4 (b) like that, the polarity of E, F signal is fixed on the positive dirction, and, shown in Fig. 4 (c) like that, the current settings of in stage " 1 "～" 4 ", respectively the coil midstream of following the tracks of executive component being crossed by access signal for+direction ,-direction ,+direction ,-direction.In stage " 1 ", as Fig. 4 (a), (d) shown in like that, in information track " n ", under the unequal hypothesis state of the positive and negative integrated value of tracking error signal TE, making tracking servo is connection, then, break so that (m-n) information track that jumped (for example 100 information tracks) simultaneously, stops access signal in its process at 5ms, and rely on elastic force to turn back to naturally in the mensuration zone of the 5ms to 10ms on the limit n near, press shown in Fig. 4 (e) like that, be taken into the voltage that carries out integration by integrating circuit 30 by A/D converter 11a, then, shown in Fig. 4 (f) like that, integrating circuit 30 is resetted.The enough big number of times that carries out this to be taken into continuously and be scheduled to for example 128 times.Then, making mean value is tracking error integrated signal SE, if not 3% of the poorest integrated value that does not reach anticipation, then adjusts tracking balance (E-F balance) TBAL (being+1 or-1 according to type as following), moves on to the follow-up stage.
Below identical, in stage " 2 "～" 4 ", respectively near information track " n ", make tracking servo (m-n) information track that jumped, in this process, stop access signal, come to be taken into for 128 times by A/D converter 11a and carry out the integral voltage SE that integration obtains by integrating circuit 30.Then, if mean value less than 3% is adjusted focusing deviation signal TOFS to eliminate its poor (deviation).
Therefore, according to above-mentioned first embodiment, when jumping a plurality of information track when tracking servo is disconnected, tracking servo is connected, and therefore, shorten the trip time of tracking servo, like this, even external shock takes place, also can move in the predetermined information track in addition.Adjust in the short time of the shortest 10ms at 5ms+5ms and finish.
Second embodiment
Below, come the second embodiment of the present invention is described with reference to Fig. 5.Second embodiment realizes as the follow-up control apparatus of MD device for reproducing recorded illustrated in figures 1 and 2.In this embodiment, have means for correcting, before A/D converter 11a detects tracking error signal, proofread and correct the reference voltage that in this conversion, uses.At first, when power connection, microcomputer 11 be reset (system reset), in the time can having finished the preparation of detection tracking error signal, input is switched to 0V (no signal condition), under this state, carrying out pre-determined number N (=256) measures, come calculating mean value, deduct this mean value from reference voltage, and finish processing.
The 3rd embodiment
Below with reference to the process flow diagram of Fig. 6 MD player as the 3rd embodiment is described.At first, in step S31, make system initialization, in step S32, judge that the dish of being packed into is RAM type (can carry out the MO of record reproducing) or ROM type (the special-purpose プ リ マ ス -De of resetting), if ROM type, then preset RF amplifier (step S33A), remove tracing deviation (step S34A), information track jump voltage is set at+excited oscillation (step S35A), adjust (step S36A), (step S37A) then resets.On the other hand, in step S32, when being judged as the RAM type, then preset RF amplifier (step S33B), remove tracing deviation (step S34B), information track jump voltage is set at+excited oscillation (step S35B), adjusts (step S36B), (step S37B) then resets or records.
Come step S36A, S36B to be elaborated below by the process flow diagram among Fig. 7 and Fig. 8 to Fig. 6.At first, at+direction (advancing) jump (step S5), wait for 5ms (step S6), information track is jumped stop (+excited oscillation end: step S7), 5ms timer (step S8) is set, SE counter that integral number of times is counted and prolongation counter are all carried out zero clearing (step S9), between 5ms, read SE integrated value (step S10,11,12) continuous 128 times, in step S11, make the SE counter increase progressively counting (+1), then, judge whether count value is more than 128.In step S12, judge whether the 5ms timer is below zero.
If step S12 is Y (being), finish owing to passed through 5ms128 time do not read, then know under the influence of off-centre etc., to measure and do not finish in the given time, make the prolongation counter increase progressively counting (+1), then, judge whether count value is 2 (step S13).If not reading when Y (in step S12) for 128 times, and then prolong 5ms and carry out 128 times and read.If 128 times are read when Y (in step S11), the then value of averaging computing (step S14).If the absolute value less than 3% of this mean value when Y (among the step S15) finishes the integration measurement process, carry out the correction (step S16) of tracing deviation.
If the absolute value of this mean value more than 3% and mean value be+time, make RF EF balance for-1 (step S17), return step S5.If the absolute value of this mean value more than 3% and mean value be-time, make RF EF balance for+1 (step S17), return step S5.If be N (denying), then return step S10 in step S13.If in step S13, be Y, then enter step S18, information track is jumped to be become-direction (falling back), enters-excited oscillation.At this, 128 mensuration integrated value SE also average, and thus, carry out 3% relatively.Because the S19～S26 after step S18 is identical with above-mentioned steps S8～S11, then omit explanation.
If the RAM type,, then they are carried out above-mentioned tracing deviation adjustment balance adjustment (promptly carrying out 2 times with different parameters at least) respectively owing to be " ROM " (zone) and in addition " RAM " partly (zone) partly in interior week.In the program of " adjustment " that be used for Fig. 7, Fig. 8, in ROM and RAM, except the parameter of for example reflectivity, exist because the polarity of EF balance becomes the difference of opposite grade then to make the different situation of being selected to of step S17.
The 4th embodiment
In the information track that should write down and/or reset, carry out above tracing deviation adjustment at record and/or before resetting.That is, for example from the information track of periphery begin to write down and or playback time, in this information track, measure.In the above description, though be make+the excited oscillation time is 5ms, this only is an example, can be 1/2nd 2.5ms in 1ms jumps with interior high speed, and, also can be the shorter time.
The 5th embodiment
Below with the various embodiments described above difference be that the center is come the fifth embodiment of the present invention is described.The 5th embodiment is following different with first embodiment that uses Fig. 3, Fig. 4 explanation on some.Come the balance of adjustment tracking error signal TEO and the action of deviation are described with reference to Fig. 9～Figure 12.Fig. 9～Figure 12 is corresponding with Fig. 3, Fig. 4, Fig. 6～Fig. 8 of front.That is, the process flow diagram of Figure 12 is the step S36A in the process flow diagram of expression Figure 11 and the figure of the handling procedure of step S36B.In corresponding process flow diagram, represent identical processing with identical step numbers, and omit explanation.In the initial step S28 of Figure 12, different with the situation of the Fig. 7 that illustrates previously, make light beam jump to periphery.
At first, carry out the initial setting of the gain of the laser power of light picker 2 and each differential amplifier, then, adjust the balance of tracking error signal TEO.In the case, shown in Fig. 9 (a) and (b) like that, light beam is moved in the information track of stage-side continuously.N shown in Figure 9, n-2 ... the center of expression information track.The solid line of Fig. 9 (a) and dotted line are represented the opposite polarity waveform of tracking error signal TE, are positioned by servo circuit 10 in an information track, and the center of the bottom right of (about 700Hz or more than) is in the center of information track so that the sine wave of a ripple.
Be described in detail below with reference to Figure 10, at first, adjust focusing deviation signal TOFS,, then, use this adjusted value, come to adjust tracking gain signal TG to become predetermined value with respect to Vref so that TE=(E-F) becomes reference voltage V ref.Then, continue to make focus servo mechanism to become on-state, simultaneously, shown in Figure 10 (b) like that, the polarity of E, F signal is fixed on the positive dirction, and, shown in Figure 10 (c) like that, a current settings of the coil midstream of following the tracks of executive component being crossed by access signal is-direction.Under the unequal hypothesis state of the positive and negative integrated value of tracking error signal TE, tracking servo is connected, then, in the mensuration zone of 5ms to 10ms, press shown in Figure 10 (e) like that, by A/D converter 11a be taken into by integrating circuit 30 carry out integration voltage (Figure 12: step S11), then, shown in Figure 10 (f) like that, integrating circuit 30 is resetted.The enough big number of times that carries out this to be taken into continuously and be scheduled to for example 128 times.Then, arithmetic average value (step S14), making resulting mean value is tracking error integrated signal SE, if not less than 3%, then adjusts tracking balance (E-F balance) TBAL (step S17: be+1 or-1 according to type), moves on to the follow-up stage.
Below identical, come to be taken into for 128 times by A/D converter 11a and carry out the integral voltage SE that integration obtains by integrating circuit 30.Then, if mean value less than 3% is adjusted focusing deviation signal TOFS to eliminate its poor (deviation).In the 5th embodiment, tracking servo is alternately disconnected connect, and during moving to TOC, adjustment is finished like this.Owing to can learn ROM or RAM from the difference of reflectivity of dish,, just can set suitable driving parameters respectively then in the type of reading just to know between the TOC dish.If the RAM type owing to be the ROM zone and the ram region in addition in interior week, then used different driving parameters to carry out above-mentioned tracing deviation respectively and is adjusted the balance adjustment.When the processing of Figure 12 finishes, in the step S38A of Figure 11 or step S38B, read in TOC, move on in playback/recording of the playback of step S27A or step S37B.
The 6th embodiment
Below with the various embodiments described above difference be that the center is come the sixth embodiment of the present invention is described.The 6th embodiment shown in the process flow diagram of Figure 13 like that, when the process flow diagram with Figure 12 compares, step S6, step S7 have been saved, and the information track of step S18 jumps and falls back, it or not accurate access to pick up, but, make tracking servo under off-state, carry out the processing of Figure 12 so that the thick access that light picker integral body moves on the radial direction of dish is carried out always.
As described above, according to the present invention, provide a kind of MD player, the automatic adjustment that can follow the tracks of at short notice simultaneously, can easily provide precision.Therefore, can adapt to requirement fully, carry out the stable what is called of adjusting at short notice and once press the button function.
Claims (6)
1. the follow-up control apparatus that optical disc apparatus is used can write down or replay signal by radiation laser beam on CD, it is characterized in that, comprising:
Discriminating gear, the type of the CD that differentiation should drive are ROM or RAM;
Parameter setting apparatus, according to the type of the CD of differentiating by above-mentioned discriminating gear,, then can set predetermined driving parameters to the ROM zone if type is ROM, if type is RAM, then can set different predetermined drive parameter respectively with ram region to the ROM zone;
Detect adjusting gear, can be on the basis of the predetermined driving parameters that sets by the above-mentioned parameter setting device, detect the tracking error integrated signal to carrying out integration, simultaneously, adjust the state of above-mentioned tracking error signal by the resultant tracking error signal of the signal of resetting from above-mentioned CD;
The excited oscillation device in order to detect above-mentioned tracking error signal, carries out positive energize vibration and negative energize vibration to above-mentioned light beam;
The tracking error arithmetic unit, tracking error integrated signal to detected continuous predetermined quantity in the zone that should measure after vibration of the positive energize that undertaken by above-mentioned excited oscillation device or negative energize vibration averages computing, exports average tracking error intergal signal;
Control device is according to the above-mentioned detection adjusting gear of being controlled the tracing positional that should adjust above-mentioned light beam by the above-mentioned average tracking error intergal signal of above-mentioned tracking error arithmetic unit institute computing.
2. the follow-up control apparatus that optical disc apparatus is used can write down or replay signal by radiation laser beam on CD, it is characterized in that, comprising:
Detect adjusting gear, type according to the CD that should drive is that ROM or RAM come with different parameter detecting by the resulting tracking error integrated signal with the tracking error signal integration of the signal of being reset from above-mentioned CD, simultaneously, can adjust the state of above-mentioned tracking error signal, it has the A/D converter of the reference voltage of the mensuration that is used to carry out above-mentioned tracking error;
The reference voltage means for correcting can be proofreaied and correct above-mentioned A/D converter reference voltage;
The tracking error arithmetic unit, after by said reference voltage correction device correction said reference voltage, tracking error integrated signal by detected predetermined quantity in the zone that should measure of above-mentioned detection adjusting gear after positive energize vibration or negative energize vibration is averaged computing, output average tracking error intergal signal;
Control device is according to controlling above-mentioned detection adjusting gear by the above-mentioned average tracking error intergal signal of above-mentioned tracking error arithmetic unit institute computing, to adjust the tracing positional of above-mentioned light beam.
3. follow-up control apparatus according to claim 1 and 2 is characterized in that, the information track of the above-mentioned zone that should measure for writing down therein.
4. the follow-up control apparatus that optical disc apparatus is used can write down or replay signal by radiation laser beam on CD, it is characterized in that, comprising:
Detect adjusting gear, can detect, simultaneously, adjust the state of above-mentioned tracking error signal by the resulting tracking error integrated signal of the signal of resetting from above-mentioned CD with the tracking error signal integration;
The excited oscillation device carries out excited oscillation in order to detect above-mentioned tracking error signal;
The tracking error arithmetic unit, carry out once at least a of above positive energize vibration and negative energize vibration by above-mentioned excited oscillation device, so that above-mentioned detection adjusting gear works, moving of a direction that causes by a kind of vibration wherein, the tracking error integrated signal of the predetermined quantity that institute's continuous detecting in the mensuration zone of not returning is thereafter gone out averages computing, output average tracking error intergal signal;
Control device, carry out the above-mentioned excited oscillation and the tracking error computing of necessary number of times, so that the above-mentioned average tracking error intergal signal that is calculated by above-mentioned tracking error arithmetic unit enters in the preset range, control above-mentioned detection adjusting gear so that adjust the tracing positional of above-mentioned light beam.
5. the follow-up control apparatus that optical disc apparatus is used can write down or replay signal by radiation laser beam on CD, it is characterized in that, comprising:
Detect adjusting gear, can detect by resulting tracking error integrated signal the signal of resetting from above-mentioned CD the tracking error signal integration, simultaneously, adjust the state of above-mentioned tracking error signal, it has the A/D converter of the reference voltage of the mensuration that is used to carry out above-mentioned tracking error;
The reference voltage means for correcting can be proofreaied and correct above-mentioned A/D converter reference voltage;
The tracking error arithmetic unit, after by said reference voltage correction device correction said reference voltage, carry out at least a of positive energize vibration or negative energize vibration by above-mentioned detection adjusting gear, cause moving of a direction by a kind of vibration wherein, tracking error integrated signal to detected predetermined quantity in the zone of thereafter mensuration averages computing, output average tracking error intergal signal;
Control device, carry out the above-mentioned excited oscillation and the tracking error computing of necessary number of times, so that the above-mentioned average tracking error intergal signal that is calculated by above-mentioned tracking error arithmetic unit enters in the preset range, control above-mentioned detection adjusting gear so that adjust the tracing positional of above-mentioned light beam.
6. the follow-up control apparatus that optical disc apparatus is used can be that illumination beam writes down or replay signal on ROM or the CD of RAM distinguishing type in advance, it is characterized in that, comprising:
Parameter setting apparatus according to the type of above-mentioned CD, if type is ROM, then can be set predetermined driving parameters to the ROM zone, if type is RAM, then can set different predetermined drive parameter respectively with ram region to the ROM zone;
Detect adjusting gear, can be on the basis of the predetermined driving parameters that sets by the above-mentioned parameter setting device, detect the tracking error integrated signal to carrying out integration, simultaneously, adjust the state of above-mentioned tracking error signal by the resulting tracking error signal of the signal of resetting from above-mentioned CD;
The TOC access device in order to detect above-mentioned tracking error signal, makes above-mentioned light beam jump to interior week from the periphery of above-mentioned CD, comes TOC is carried out access;
The tracking error arithmetic unit averages computing, output average tracking error intergal signal to the tracking error integrated signal of the continuous predetermined quantity that detected during the above-mentioned jump that is produced by above-mentioned TOC access device;
Control device is according to controlling above-mentioned detection adjusting gear to adjust the tracing positional of above-mentioned light beam by the above-mentioned average tracking error intergal signal of above-mentioned tracking error arithmetic unit institute computing.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP97173280 | 1997-06-13 | ||
| JP173280/97 | 1997-06-13 | ||
| JP17328097A JPH117639A (en) | 1997-06-13 | 1997-06-13 | Tracking control unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1204115A CN1204115A (en) | 1999-01-06 |
| CN1147858C true CN1147858C (en) | 2004-04-28 |
Family
ID=15957533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB981020917A Expired - Fee Related CN1147858C (en) | 1997-06-13 | 1998-06-11 | Tracking controller |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH117639A (en) |
| CN (1) | CN1147858C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW484128B (en) * | 2000-01-12 | 2002-04-21 | Sony Corp | Optical disc apparatus |
| KR100676354B1 (en) | 2000-03-02 | 2007-01-31 | 산요덴키가부시키가이샤 | Variable resistance circuit, operational amplification circuit, semiconductor integrated circuit, time constant switching circuit and waveform shaping circuit |
| JP2004022077A (en) | 2002-06-17 | 2004-01-22 | Funai Electric Co Ltd | Optical disk recording and reproducing device |
| JP4077696B2 (en) * | 2002-09-05 | 2008-04-16 | 松下電器産業株式会社 | Tracking control device |
| KR100546306B1 (en) * | 2002-11-20 | 2006-01-26 | 삼성전자주식회사 | Method and apparatus for discriminating optical disc |
-
1997
- 1997-06-13 JP JP17328097A patent/JPH117639A/en active Pending
-
1998
- 1998-06-11 CN CNB981020917A patent/CN1147858C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1204115A (en) | 1999-01-06 |
| JPH117639A (en) | 1999-01-12 |
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| SE01 | Entry into force of request for substantive examination | ||
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Granted publication date: 20040428 Termination date: 20130611 |