CN102024466B - Operating method and device for initializing optical device - Google Patents
Operating method and device for initializing optical device Download PDFInfo
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- CN102024466B CN102024466B CN200910170756A CN200910170756A CN102024466B CN 102024466 B CN102024466 B CN 102024466B CN 200910170756 A CN200910170756 A CN 200910170756A CN 200910170756 A CN200910170756 A CN 200910170756A CN 102024466 B CN102024466 B CN 102024466B
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- radial
- radial error
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- error correcting
- play amount
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Abstract
The invention relates to operating method and device for initializing an optical device. The method comprises the steps of: generating an initial radial error signal by an optical read head unit; receiving the initial radial error signal by a radial error correction unit; generating a radial driver drive signal by the radial error correction unit; receiving a corrected radial error signal by a radial controller; generating a radial error correction result by the radial controller; and controlling a radial driver to promote rail crossing according to the radial driver drive signal and the radial error correction result.
Description
Technical field
The application is relevant for the optimization operation of optical devices; Obtain preferable operating parameter when relating in particular to initialization; Help the operation of optical devices, especially after optical devices got into normal running, these operating parameters helped the correction of radial tracking error.
Background technology
Before beginning to read the data of optical storage medium; The AFE(analog front end) of the CD player first initialization chip of meeting (CD/DVD chip); In this initialization step, obtain a plurality of operating parameters; So that proofread and correct focusing, radial tracking (radial tracking error, RE), turntable motor control and data retrieval etc.
A correction of wherein carrying out is adjustment radial tracking error (being called for short radial error thereafter); Be mainly used in and when the normal play CD, can keep reading luminous point and focus on the track bar; Measure the initial minimum value and the original maximum of the radial error signal when striding rail when proofreading and correct calculation earlier; Calculate average minimum and average maximal value in a period of time then,, just can calculate the also intensity and the side-play amount of correct radial error signal according to these values.
When striding rail for the adjustment degree of calculating radial error, (opticalpick-up unit's optically read head unit OPU) must focus; Therefore, focus controller switches to ON, turntable motor (turntable motor; TTM) also start with rotary optical storage medium/disc, during initialization/calculating mean value, need enough rail numbers of striding; Could obtain reliable data, but reality not so usually.First kind of situation is that disc is when having off-centre; To read luminous point be zero with respect to the speed of track striding rail point place, because be zero with respect to the speed of track, just unreliable at all mean values of these points; Second kind of situation is not have under the off-centre when disc; During calculating mean value, possibly have only seldom stride the rail number or even do not stride rail, therefore enough information can't be provided; This can cause the measurement of mean radial error intensity and side-play amount inaccurate, and bad radial error signal is proofreaied and correct to influence and play usefulness.
See also Fig. 1 a; It shows that the conventional optical disc machine carries out radially several signals of correction error when startup/initialization; Between two dotted lines, being and carrying out the radially time of correction error, is respectively that focus driver signal FA, radial actuator drive signal RA, four optics receiving-member A, B, C, D detecting devices calculate signal HF and the radial error signal RE that merges from top to bottom.During radial error is proofreaied and correct, can drive focus controller with focus driver signal FA, disc rotation carrying out HF proofreaies and correct, and can observe the radial error signal that rail is striden in representative, but radial actuator signal RA is zero, therefore radially controller does not act on.
Fig. 1 b is the partial enlarged drawing of Fig. 1 a; Show the fore-end during radial error is proofreaied and correct; The dotted line place of enclosing has shown the turning point of optical disc eccentricity among Fig. 1 b; Read exactly that relative velocity between luminous point and disc becomes extremely slow even be zero place, can quicken in the opposite direction after this relative velocity.
Oversize when these turning point consumed time, just can influence the fiduciary level that radial error is proofreaied and correct, in addition; If these turning points occur between two rails, the acquisition circuit just can not detect concave point (pit), if can't detect concave point; Just can miss the HF signal, thereby trigger the HF recovery routine, then force and restart the radial error correction; This chain reaction meeting prolongs initialized program, delays the normal operation of optical devices.
If the degree of eccentricity of CD is lower or almost do not have off-centre, the fiduciary level that radial error is proofreaied and correct also can reduce.Under the situation of hanging down degree of eccentricity or spending without acceptance of persons; Because during proofreading and correct to stride the rail number not enough; The radial error correction program possibly fall flat, and perhaps obtains not good radial error correction parameter, can not make CD player to play even bad radial error is proofreaied and correct; Neither optimum value or right value but stride the not enough resulting operating parameter of rail number, still have influence on the usefulness of CD player.
Summary of the invention
The present invention when the radial error correction program active drive radial actuator to address the above problem; Even if be positioned at eccentric turning point; Also force to stride rail and take place, so, the present invention just can obtain correct radial error correction parameter to increase the broadcast usefulness of CD player.
The object of the invention provides one to improve and optimization optical devices method of operating and device; Especially the present invention overcomes foregoing problems; Can when initialization, obtain operating parameter more reliably; Optical devices radial error when helping normal running is proofreaied and correct, and in addition, the operating parameter that is provided can provide better correction to revise radial error when the optical devices normal running.
In order to reach above-mentioned advantage and to accomplish the object of the invention, the present invention provides a kind of optical devices, the operation usefulness that can improve; The radial error signal correction also has more reliable; Wherein optical devices during initialization or any calculating radial error signal correction parameter in, enough rail numbers of striding are provided, so that improve the fiduciary level that radial error signal is proofreaied and correct; The preferably; These optical devices also comprise a controller radially, can be during initialization or any calculating radial error signal correction parameter in, the control radial actuator.
The present invention also provides a kind of method that increases CD player operation usefulness; It is utilize to increase the fiduciary level that radial error signal is proofreaied and correct, this method during initialization or any calculating radial error signal correction parameter in, enough rail numbers of striding are provided; And the fiduciary level of improving the radial error signal correction; One preferred optical device also comprises a controller radially, can be during initialization or any calculating radial error signal correction parameter in, the control radial actuator.
According to the object of the invention, have the optical system that strengthens initialization usefulness and comprise an optically read head unit, produce an initial radial error signal; One radial error correcting unit receives this initial radial error signal and produces a radial actuator drive signal; One controller radially receives one and revises radial error signal, and produces a radial error correcting result; And a radial actuator, wherein this optically read head unit is controlled this radial actuator according to this radial actuator drive signal and this radial error correcting result, impels to stride rail and take place.
According to the object of the invention, the method that strengthens the optics initialization operation comprises: an optically read head unit produces an initial radial error signal; One radial error correcting unit receives this initial radial error signal; This radial error correcting unit produces a radial actuator drive signal; One radially controller receive one and revise radial error signal; This radially controller produce a radial error correcting result; And, control a radial actuator according to this radial actuator drive signal and this radial error correcting result, impel and stride the rail generation.
Description of drawings
Fig. 1 a and Fig. 1 b show the signal analysis ifm diagram of known technology when the CD player initialization, and it is to utilize the survey instrument of Agilent Technologies (Agilent Technologies) measured.
Fig. 2 a and Fig. 2 b show the signal analysis ifm diagram of the present invention when the CD player initialization, and it is to utilize the survey instrument of Agilent Technologies measured.
Fig. 3 is the synoptic diagram according to first embodiment of the invention, carries out radial error when being used for the optical devices initialization and proofreaies and correct.
Fig. 4 is the synoptic diagram according to second embodiment of the invention, carries out radial error when being used for the optical devices initialization and proofreaies and correct.
Wherein, description of reference numerals is following:
10 radial error correcting units 20 are controller radially
30 optical read head cell S 40, S1, S2 switch
50 side-play amount regulators, 60 yield value regulators
70 totalizer 80a initial radial error signals
80b revises radial error signal 90 radial actuator signals
100 radial actuator drive signals
Embodiment
See also Fig. 2, explain that the present invention is applied to the result during radial error is proofreaied and correct, during proofreading and correct,, can produce at eccentric turning point and stride rail, reduce in the turning point consumed time for example with 1300Hz sine wave signal active drive radial actuator.Fig. 2 b is the partial enlarged drawing of Fig. 2 a, shows the fore-end during radial error is proofreaied and correct, and compares with Fig. 1 b, between two rails, does not produce eccentric turning point, and therefore system of the present invention can provide more accurate radial error signal in during this period.
Utilize existing most optical devices (CD/DVD) chip, (automatic gain control, AGC) oscillator of circuit is in the radial error timing, injects signal to control loop radially, just practicable the present invention to make the control of automatic gain value.See also the Fig. 3 that shows its implementation principle, in the present invention, must start focus controller; To read luminous point focuses on the CD; Must rotate disc simultaneously, switch S 40 conductings this moment are seen initial radial error signal RE 80a off and are given radial error correcting unit 10.In another embodiment, switch S 40 can proofread and correct selectivity to transmit initial radial error signal 80a to give side-play amount regulator 50 or radial error correcting unit 10 according to whether carrying out radial error.In another embodiment, when radial error surpasses a predetermined value, system can make switch S 40 conductings, continues the correct radial error signal, to increase the usefulness of CD player.
Radial error correcting unit 10 is used to carry out the radial error correction program, can produce the radial actuator that radial actuator drive signal 100 drives optically read head unit 30, to produce enough rail numbers of striding, is convenient for measuring.After the intensity and side-play amount of the initial radial error signal 80a of radial error correcting unit in 10 average a period of times of meeting; Side-play amount and yield value according to average result adjustment radial error; Produce correction radial error signal RE ' 80b and give radially controller 20, and the side-play amount of this adjustment and yield value can be stored in side-play amount regulator 50 and the yield value regulator 60.Wherein this side-play amount regulator 50 receives a radial error correction signal to produce a side-play amount conditioning signal from this radial error correcting unit 10; And this yield value regulator 60 receives this radial error correction signal and receives this side-play amount conditioning signal, yield value regulator 60 from this side-play amount regulator 50 from this radial error correcting unit 10
According to this radial error correction signal and this side-play amount conditioning signal, produce and revise radial error signal and send radially controller 20 to.Radially controller 20 produces the radial error correcting result to drive radial actuator according to revising radial error signal 80b.
Fig. 4 shows the second embodiment of the present invention; So advanced at the beginning conduct is opened circuit and switch S 2 conductings to error correction switch S 1; Initial radial error signal 80a can deliver to radial error correcting unit 10, and radial error correcting unit 10 produces radial actuator drive signal 100, to drive the radial actuator of optically read head unit 30; Produce enough rail numbers of striding, so that measure.After the intensity and side-play amount of initial radial error signal 80a in 10 average a period of times of radial error correcting unit; Side-play amount and yield value according to average result adjustment radial error signal; Produce and revise radial error signal RE ' 80b; Offer radially controller 20, and the side-play amount of this adjustment and yield value can be stored in side-play amount regulator 50 and the yield value regulator 60.Radially controller 20 produces the radial error correcting result according to revising radial error signal 80b; Totalizer 70 respectively from radial error correcting unit 10 and radially controller 20 receive radial actuator drive signals 100 and radial error correcting result; According to the radial error correcting result radial actuator drive signal 100 is sent to optically read head unit 30, produces enough rail numbers of striding so that drive the radial actuator of optically read head unit 30.
After the radial error correction finishes, just determined the side-play amount and the yield value of radial error signal, just need not pass through radial error correcting unit 10 afterwards and proofread and correct, so actuating switch S2 and interrupt switch S1.The initial radial error signal 80a that will newly produce afterwards delivers to side-play amount regulator 50 to produce a side-play amount conditioning signal; After yield value regulator 60 receives this side-play amount conditioning signal; Can produce and revise radial error signal 80b, will revise radial error signal 80b and deliver to radially controller 20 control radial actuators.If after operation in have and need (for example in a schedule time or play usefulness when not good), can carry out radial error again and proofread and correct, that is interrupt switch S1 and actuating switch S2, utilize radial error correcting unit 10 to adjust side-play amount and yield value once more.
More than in the radial error correction program, initiatively produce the mode of striding rail, can be applied to all optical devices that need the correct radial tracking error signal (CD, DVD or the like).
Though the present invention discusses and describes some preferred embodiment in literary composition; But teaching of the present invention can modified or use to various equivalent modifications and other embodiment that derive; Those skilled in the art must carry out many modifications to the present invention, right neither taking off as attaching the scope of claims.
Claims (7)
1. an optical system is characterized in that, this optical system comprises:
One optically read head unit produces an initial radial error signal;
One radial error correcting unit receives this initial radial error signal from this optically read head unit, and produces a radial actuator drive signal;
One side-play amount regulator is used for:
Receive a radial error correction signal to produce a side-play amount conditioning signal from this radial error correcting unit;
One yield value regulator is used for:
Receive this radial error correction signal from this radial error correcting unit;
Receive this side-play amount conditioning signal from this side-play amount regulator; And
According to this radial error correction signal and this side-play amount conditioning signal, produce one and revise radial error signal;
One controller radially receives and should revise radial error signal, and produces a radial error correcting result; And
One radial actuator,
Wherein this optically read head unit is controlled this radial actuator according to this radial actuator drive signal and this radial error correcting result, impels and strides the rail generation.
2. optical system as claimed in claim 1 is characterized in that, this optical system also comprises:
One switch is used for:
Receive this initial radial error signal from this optically read head unit; And
Transmit this initial radial error signal and give this side-play amount regulator, proofread and correct, or stopping to transmit this initial radial error signal gives this side-play amount regulator, proofread and correct to stop radial error to carry out radial error.
3. optical system as claimed in claim 1 is characterized in that, this optical system also comprises:
One totalizer is used for
From this radially controller receive this radial error correcting result;
Receive this radial actuator drive signal from this radial error correcting unit; And
According to this radial error correcting result, judge whether to transmit this radial actuator drive signal and give this optically read head unit, so that control this radial actuator, impel and stride the rail generation.
4. the initialized method of operating of optical system is characterized in that this method comprises the following steps:
One optically read head unit produces an initial radial error signal;
One radial error correcting unit receives this initial radial error signal;
This radial error correcting unit produces a radial actuator drive signal;
This radial error correcting unit produces a radial error correction signal;
One side-play amount regulator receives this radial error correction signal and produces a side-play amount conditioning signal;
One yield value regulator receives this radial error correction signal;
This side-play amount regulator transmits this side-play amount conditioning signal and gives this yield value regulator;
This yield value regulator produces one and revises radial error signal according to this radial error correction signal and this side-play amount conditioning signal;
One radially controller receive and should revise radial error signal;
This radially controller produce a radial error correcting result; And
According to this radial actuator drive signal and this radial error correcting result, control a radial actuator, impel and stride the rail generation.
5. method as claimed in claim 4 is characterized in that this method also comprises the following steps:
One totalizer from this radially controller receive this radial error correcting result;
This totalizer receives this radial actuator drive signal from this radial error correcting unit; And
This totalizer judges whether to transmit this radial actuator drive signal and gives this optically read head unit according to this radial error correcting result, so that control this radial actuator, impels and strides the rail generation.
6. the device of an optical system initialization operation is characterized in that, this device comprises:
One radial error correcting element is used for:
Receive an initial radial error signal;
According to this initial radial error signal, produce a radial error correction signal; And
Produce a radial actuator drive signal;
One side-play amount regulating element is used for:
Receive a radial error correction signal to produce a side-play amount conditioning signal from this radial error correcting element; And
One yield value regulating element is used for:
Receive this radial error correction signal from this radial error correcting element;
Receive this side-play amount conditioning signal from this side-play amount regulating element; And
According to this radial error correction signal and this side-play amount conditioning signal, produce one and revise radial error signal;
One control element radially is used for:
Receive and to revise radial error signal; And
Produce a radial error correcting result;
One radial drive element is used for:
Impel and stride the rail generation; And
One optically read element is used for:
Produce this initial radial error signal; And
According to this radial actuator drive signal and this radial error correcting result, control this radial drive element.
7. device as claimed in claim 6 is characterized in that, this device also comprises:
One totalizer is used for:
From this radially control element receive this radial error correcting result;
Receive this radial actuator drive signal from this radial error correcting element; And
According to this radial error correcting result, judge whether to transmit this radial actuator drive signal and give this optically read element, so that control this radial drive element, impel and stride the rail generation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910170756A CN102024466B (en) | 2009-09-09 | 2009-09-09 | Operating method and device for initializing optical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910170756A CN102024466B (en) | 2009-09-09 | 2009-09-09 | Operating method and device for initializing optical device |
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| Publication Number | Publication Date |
|---|---|
| CN102024466A CN102024466A (en) | 2011-04-20 |
| CN102024466B true CN102024466B (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910170756A Expired - Fee Related CN102024466B (en) | 2009-09-09 | 2009-09-09 | Operating method and device for initializing optical device |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1864211A (en) * | 2003-10-06 | 2006-11-15 | 皇家飞利浦电子股份有限公司 | Optical disc drive and method for controlling the position of a lens |
| CN101145356A (en) * | 2006-09-14 | 2008-03-19 | 三洋电机株式会社 | Track jump control circuit |
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2009
- 2009-09-09 CN CN200910170756A patent/CN102024466B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1864211A (en) * | 2003-10-06 | 2006-11-15 | 皇家飞利浦电子股份有限公司 | Optical disc drive and method for controlling the position of a lens |
| CN101145356A (en) * | 2006-09-14 | 2008-03-19 | 三洋电机株式会社 | Track jump control circuit |
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| Publication number | Publication date |
|---|---|
| CN102024466A (en) | 2011-04-20 |
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