CN100351920C - Optical information recording device - Google Patents
Optical information recording device Download PDFInfo
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- CN100351920C CN100351920C CNB2005100751336A CN200510075133A CN100351920C CN 100351920 C CN100351920 C CN 100351920C CN B2005100751336 A CNB2005100751336 A CN B2005100751336A CN 200510075133 A CN200510075133 A CN 200510075133A CN 100351920 C CN100351920 C CN 100351920C
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Abstract
The invention provides a method effective in detecting a reproduction signal in real time correction in which correction is simultaneously performed with recording. In this method, a laser beam emitted from a laser diode 110 is divided into a plurality of beam spots by a diffraction grating 114. One of the plurality of beam spots is used as a beam spot for recording, and another beam spot is used as a beam spot for reproduction. Reflected light components obtained from these beam spots are independently detected by a detector 122. A period for which a recording laser beam is in an ON state is referred to as a gate signal, and a mask is put on an RF signal obtained from a beam spot for reproduction, thereby selectively detecting pits reproduced when the recording laser beam is in the ON state.
Description
Technical field
The present invention relates to a kind of device for optical information recording, particularly the device for optical information recording of correction entries condition in real time.
Background technology
Information record to optical information recording mediums such as CDs, undertaken by following mode, that is: record data are modulated with EFM (Eight to Fourteen Modulation) form, 8-16 modulation format, form recording impulse according to this modulation signal, intensity or irradiation timing according to this recording impulse control laser form record pit on CD.
Herein, the formation of record pit, owing to be that utilization is undertaken by the heat of the irradiation generation of laser, so recording impulse need have been considered the setting of accumulation of heat effect or heat interference etc.So, with the form of strategy (strategy) a plurality of definition were carried out in the setting of the various parameters of formation recording impulse by the kind of CD in the past, from these strategies, select to be suitable for most the strategy of this record environment, carry out record to CD.
This strategy not only depends on the individual difference of device for optical information recording such as the some footpath deviation, MECHANISM PRECISION deviation of light picker (pick-up) for example, also depend on the manufacturer's classification and the writing speed of the CD when being used for record-playback, therefore set optimal strategy and will improve the record quality.
For this reason, people have proposed such method: obtain the optimal strategy corresponding to the CD of each manufacturer's classification, should store in the storer in advance corresponding to each manufacturer's classification by strategy, to cd-rom recording of information the time, manufacturer's classification of the CD of reading and recording in CD is read the corresponding optimal strategy of manufacturer's classification that is read with this from above-mentioned storer and is used.
But, according to said method, though can carry out best titime for the CD that is stored in the manufacturer's classification in the storer in advance, but for the CD that is not stored in the manufacturer's classification in the storer, then can't carry out best titime, in addition, even be stored in the CD of the manufacturer's classification in the storer in advance, when writing speed not simultaneously, can not carry out best titime.
Therefore, shown in following patent documentation 1～4, like that, proposed to carry out test record in advance, determined optimal strategy according to this test record, thereby can tackle the method for various CDs by record condition.
[patent documentation 1] Japanese kokai publication hei 5-144001 communique
[patent documentation 2] Japanese kokai publication hei 4-137224 communique
[patent documentation 3] Japanese kokai publication hei 5-143999 communique
[patent documentation 4] Japanese kokai publication hei 7-235056 communique
Yet the method shown in the above-mentioned patent documentation 1～4 owing to need to carry out test record before start information record, therefore can't be proofreaied and correct strategy in record, is difficult to carry out the reply of the different situation of the top condition of internal periphery.
As solving since exist CD from interior perimembranous to peripheral part variant, pen recorder one side of several recording characteristics in the different situation of writing speed of interior perimembranous and peripheral part, therefore write down the method that quality produces the such problem of interior heterodyne, following patent documentation has disclosed by adjusting laser and has exported the technology of alleviating interior heterodyne.
[patent documentation 5] Japanese kokai publication sho 53-050707 communique
In this patent documentation 5, the light quantity that discloses by detecting side beam changes, and automatically carries out the method for the optimization of laser output, and this kind method is called as OPC.
Above-mentioned such OPC, owing to be the method for adjusting power, can obtain correcting condition by statistical indexs such as asymmetric (asymmetry) values, therefore also can realize the real-time correction of proofreading and correct while writing down, but when the phase condition of correction pulse width or pulse, owing to needing the detection record pulse and, therefore being difficult to tackle with existing OPC in the side-play amount between the formed hole on the CD.
Therefore, in order to carry out the real-time correction of impulsive condition, just need in record, detect the position in hole or the technology of length.As a method (approach) that addresses this problem, the technology to reproducing with record position position is much at one disclosed in following patent documentation 6.
[patent documentation 6] Japanese kokai publication sho 51-109851 communique
But,, be difficult to be suitable for for the optical recording of not using magnetic though this method can be applicable to magneto-optical recorder.That is, in magneto-optical recorder, because by magnetic modulation carrying out recording of information, therefore the output of laser is unmodulated, but in optical recording, carry out recording of information owing to modulating by the output of laser, the influence that therefore can produce this modulation feeds through to the problem of reproducing a side.
As the method that addresses this problem, the known method that has following document to disclose.
[patent documentation 7] Japanese kokai publication hei 1-287825 communique
[patent documentation 8] Japanese kokai publication hei 7-129956 communique
[patent documentation 9] TOHKEMY 2004-22044 communique
[patent documentation 10] Japanese kokai publication hei 9-147361 communique
Patent documentation 7 is such technology, that is: to posting field and posting field do not shine different light beams, the different signal that obtains by making carries out division calculation each other and takes out reproducing signal, according to this method, can proofread and correct when recorded information because the distortion of the reproducing signal waveform that the light intensity modulation of laser causes.
In addition, patent documentation 8 is following technology, that is: offset the output of having accepted modulation by laser output after suitably being amplified by AGC (Auto GainControl) and inversion clock and obtain reproducing signal.
In addition, patent documentation 9 is following technology, that is: with the distortion of the reproducing signal of the waveform of incident record pulse change, generate the signal of the waveform change that is equivalent to this recording impulse and offset by postponing anti-phase equivalent circuit, thereby eliminate this distortion.
Patent documentation 7 to 9 methods that disclosed all are the technology of eliminating the modulation composition by computing.Though think in theory to offset, on precision of offsetting and arithmetic speed, aspect practicability, have variety of problems.
In addition, patent documentation 10 is following technology, that is: by use after the pulse daley that will be used to write down delayed pulse and with modulated signals the gate signal after anti-phase, together with reproducing pulse input phase comparer, thereby detect the deviation of recording status in real time.
Yet these patent documentation 10 disclosed methods owing to be the reproduction of cheating, therefore under the low situation of the output of side beam (sub beam), are difficult to obtain to have enough high-quality reproducing signal when recording impulse is pass (OFF).Especially generating again by recording main beam (main beam) branch in the structure of used side beam, when branch's ratio becomes 20: 1 or 30: 1 the time, distribute to the enough output of the side beam difficulty that will become.
Promptly, branch's ratio in patent documentation 10 is 8: 1, but be accompanied by the high speed of writing speed, this branching ratio is tended to become bigger and bigger, in addition, be less than or equal to 1mW owing to light beam output when recording impulse is the pass is generally, therefore when recording impulse is the pass, can the catoptrical intensity of detected record surface become very little.Because when can detected light intensity dying down, be subjected to the influence of circuit noise (noise), media noise etc. easily, the result causes and can't obtain the good detection signal.
Summary of the invention
The invention provides a kind of with the record real-time correction of proofreading and correct simultaneously in, to the detection effective method of reproducing signal.
To achieve these goals, the 1st device of the present invention is a kind of device for optical information recording, use laser with laser with reproducing with generating record after the beam of laser branch, use the pulse irradiation of laser on optical recording media, to form the hole by above-mentioned record, carry out the detection in above-mentioned hole simultaneously with the irradiation of laser by above-mentioned reproduction, it is characterized in that: above-mentioned record carries out based on the recording impulse that has high output area and these 2 output areas of low output area at least with the pulse irradiation of laser; The detection in above-mentioned hole, above-mentioned record with laser with above-mentioned high output area irradiation during in carry out.
Herein, so-called high output area refers to the zone that recording impulse becomes out (ON) state; So-called low output area refers to the zone that recording impulse becomes off status.
So, by the detection of cheating with the high output area of laser, even, also can guarantee the output of playback light forming reproduction with under the situation of laser by branch at record.Especially record with laser with reproduce greatly, be difficult to guarantee that with laser under the situation of enough output, this method is effective for reproduction with branch's ratio of laser.
That is, because during the hole is write down, strong laser during output luminous strength ratio normal reproduction therefore by taking out the high condition of this output selectively, and is taken into reproducing signal, just can detect the less high-precision reproducing signal of noise ratio.
Like this according to detected hole information, the correction entries condition can be sought the reply of interior periphery difference in real time by above.In addition, by in the record in the hole longer, reading short hole than detected object, the method of carrying out the optimization of strategy is also contained among the present invention, interruption logging does not move and the firm information that writes down of taking-up at once, detect the deviation of tracer signal, the method for proofreading and correct strategy according to this detected deviation is also contained among the present invention.
In addition, the 2nd device of the present invention is a kind of device for optical information recording, use laser with laser with reproducing with generating record after the beam of laser branch, use the pulse irradiation of laser on optical recording media, to form the hole by above-mentioned record, carry out the detection in above-mentioned hole simultaneously with the irradiation of laser by above-mentioned reproduction, it is characterized in that: above-mentioned record carries out based on the recording impulse that has high output area and these 2 output areas of low output area at least with the pulse irradiation of laser; Above-mentioned reproduction is with the pulse irradiation of laser, to carry out with the synchronous timing of the pulse irradiation of laser with above-mentioned record; The detection in above-mentioned hole is carried out in the high output area of above-mentioned reproduction with laser.
So, use laser synchronous with laser,, can carry out high-precision input reproducing the detection of cheating with the high output area of laser with record by making to reproduce.In addition, as synchronous form, comprise branch, 2 light beam irradiates, two Laser Driven based on diffraction.
In addition, the 3rd device of the present invention is a kind of device for optical information recording, use laser with laser with reproducing with generating record after the beam of laser branch, use the pulse irradiation of laser on optical recording media, to form the hole by above-mentioned record, carry out the detection in above-mentioned hole simultaneously with the irradiation of laser by above-mentioned reproduction, it is characterized in that: above-mentioned record carries out based on the recording impulse that has high output area and these 2 output areas of low output area at least with the pulse irradiation of laser; The constant output zone that the level that above-mentioned high output area has above-mentioned recording impulse becomes constant; The detection in above-mentioned hole, above-mentioned record with laser with above-mentioned constant output area illumination during in carry out.
Herein, so-called constant output zone refers to recording impulse for opening state, and modulates few constant zone, preferably is set at the above zone of no modulation condition certain time.More particularly, the high output area of recording impulse preferably uses long constant output zone as 14T or 11T.
So, by the detection of in the constant output zone of recording impulse, cheating, can avoid the influence of modulating.Promptly, even be to use under the situation of same light source at record and reproduction, recording impulse also can be by using no constant no modulation areas jumpy selectively, and carry out exporting and the detection in the hole of the laser of constant output based on height, consequently can obtain high-precision signal.
In addition, the 4th device of the present invention is a kind of device for optical information recording, use laser with laser with reproducing with generating record after the beam of laser branch, use the pulse irradiation of laser on optical recording media, to form the hole by above-mentioned record, carry out the detection in above-mentioned hole simultaneously with the irradiation of laser by above-mentioned reproduction, it is characterized in that: above-mentioned record carries out based on the recording impulse that has high output area and these 2 output areas of low output area at least with the pulse irradiation of laser; The constant output zone that the level that above-mentioned high output area has above-mentioned recording impulse becomes constant; Above-mentioned reproduction is with the pulse irradiation of laser, to carry out with the synchronous timing of the pulse irradiation of laser with above-mentioned record; The detection in above-mentioned hole is carried out in the constant output zone of above-mentioned reproduction with laser.
So, use laser synchronous with laser,, can carry out high-precision input reproducing the detection of cheating with the constant output zone of laser with record by making to reproduce.
In addition, the 5th device of the present invention is a kind of device for optical information recording, use laser with laser with reproducing with generating record after the beam of laser branch, use the pulse irradiation of laser on optical recording media, to form the hole by this record, carry out the detection in above-mentioned hole simultaneously with the irradiation of laser by above-mentioned reproduction, it is characterized in that, comprising: the pulse generation device that generates the recording impulse that has high output area and these 2 output areas of low output area at least; With the high output area that uses above-mentioned recording impulse, to the shield assembly that shields with the reproducing signal that irradiation obtained of laser by above-mentioned reproduction.
So, the high output area shielding reproducing signal by at recording impulse can take out the signal that laser was reproduced with height output selectively.In addition, as the form of shielding, comprise that shielding is by reproducing the method with the RF signal that laser obtained, the method that shielding is converted to the reproducing signal of 2 systems.
In addition, the 6th device of the present invention is a kind of device for optical information recording, use laser with laser with reproducing with generating record after the beam of laser branch, use the pulse irradiation of laser on optical recording media, to form the hole by this record, carry out the detection in above-mentioned hole simultaneously with the irradiation of laser by above-mentioned reproduction, it is characterized in that, comprising: the pulse generation device that generates the recording impulse that has high output area and these 2 output areas of low output area at least; Determine the device in the constant output zone that level in above-mentioned high output area, above-mentioned recording impulse becomes constant; And the constant output zone of using above-mentioned recording impulse, to the shield assembly that shields with the reproducing signal that irradiation obtained of laser by above-mentioned reproduction.
So, by constant output regions shield reproducing signal, can take out signal selectively with the laser reconstruction of height output and steady state at recording impulse.
In addition, the 7th device of the present invention is a kind of device for optical information recording, use laser with laser with reproducing with generating record after the beam of laser branch, use the pulse irradiation of laser on optical recording media, to form the hole by this record, carry out the detection in above-mentioned hole simultaneously with the irradiation of laser by above-mentioned reproduction, it is characterized in that, comprising: the pulse generation device that generates the recording impulse that has high output area and these 2 output areas of low output area at least; Use the gate signal generating apparatus of the high output area generation gate signal of above-mentioned recording impulse; Determine above-mentioned record laser and the above-mentioned reproduction device of the mistiming of laser; Determine to have the device of the detected object pulse of the length shorter than above-mentioned gate signal; And when having considered above-mentioned mistiming,, obtain by the hole pick-up unit of above-mentioned reproduction with the reproducing signal that irradiation obtained of laser in above-mentioned gate signal, to comprise the timing of above-mentioned detected object pulse.
So, by detecting the length hole shorter selectively, can carry out the detection in more reliable hole than gate signal.That is, under the situation in the long hole of record, compare the situation in the short hole of record, the time that laser output is maintained high state is elongated.Thus,, detect the record pit that has than this shorter writing time selectively with laser, can obtain the length and the phase information in hole exactly to reproduce by in the length of record with the fluorescent lifetime of laser.
In addition, the form of utilizing as gate signal comprises following content.
By generating the corresponding gate signal of recording impulse with the hole longer than detected object, compare with reproducing the detection signal that detects with beam spot (beam spot), only take out the reproducing signal in the record in hole of length selectively.
By generating the corresponding gate signal of recording impulse with relatively long hole than detected object, compare with reproducing the detection signal that detects with beam spot, only take out the recording impulse in the hole of length selectively.
In addition, the 8th device of the present invention is a kind of device for optical information recording, use laser with laser with reproducing with generating record after the beam of laser branch, use the pulse irradiation of laser on optical recording media, to form the hole by this record, carry out the detection in above-mentioned hole simultaneously with the irradiation of laser by above-mentioned reproduction, it is characterized in that, comprising: the logic by getting the 1st pulse and the 2nd pulse and, generate the pulse generation device of recording impulse; According to above-mentioned recording impulse, carry out the device of above-mentioned record with the pulse irradiation of laser; The inversion signal by getting above-mentioned the 1st pulse and the logic product of above-mentioned the 2nd pulse generate the gate pulse generating apparatus of gate pulse; And, obtain by the hole pick-up unit of above-mentioned reproduction with the reproducing signal that irradiation obtained of laser according to above-mentioned gate pulse.
So, be used for the impulse element of activation record, generate the gate pulse of reproducing signal shielding usefulness, thereby can seek the high-level efficiency that gate signal generates with laser by utilization.
As mentioned above, according to the present invention, because therefore the detection that laser is cheated under the state of height output can carry out more high-precision real-time correction.
Description of drawings
Fig. 1 is the block diagram of the inner structure of expression driving of the present invention.
Fig. 2 is the exploded perspective view that expression is loaded into the structure of the light picker in the driving shown in Figure 1.
Fig. 3 is the planimetric map that expression is radiated at the configuration of the point (spot) on the card of CD.
Fig. 4 is that expression is radiated at the point on the card of CD and the concept map of the relation between the wave detector (detector).
Fig. 5 is the concept map of the relation in expression shape of recording impulse and constant zone.
Fig. 6 is the circuit block diagram of the inner structure of expression pulse generation circuit shown in Figure 1.
Fig. 7 is the sequential chart of the generation notion of expression gate signal shown in Figure 6.
Fig. 8 is the circuit diagram of the inner structure of expression LD driver shown in Figure 1.
Fig. 9 is the circuit block diagram of the inner structure of expression screened circuit shown in Figure 1.
Figure 10 is the sequential chart of the relation between expression recording impulse and gate pulse and the reproducing signal.
Figure 11 is the concept map of the generation method of the marking signal carried out of expression CPU shown in Figure 1.
Figure 12 is the sequential chart of the relation between recording main beam of expression and the used again side beam.
Figure 13 is the expression recording impulse and makes the pulse of this recording impulse delay and the sequential chart of the relation between the RF signal.
Figure 14 is the block diagram of example of having represented to detect the method for short hole or space (space) in the record in long hole.
Figure 15 is the block diagram of the relation between the pulse generation circuit 300 of expression counter 256 shown in Figure 14 and Fig. 1.
Figure 16 is the concept map of the example when representing impact damper 250-2 storage bit string shown in Figure 14.
Figure 17 is the concept map that is illustrated in the record in 14T hole as the variation in the 4T space of detected object.
Figure 18 is the block diagram of other examples of having represented to detect the method in short hole or space in the record in long hole.
Figure 19 is the sequential chart of the processing example of expression circuit block shown in Figure 180.
Figure 20 is the concept map of expression by the judgement signal judgment benchmark of the circuit block generation of Figure 18.
Figure 21 is the block diagram of other examples of having represented to detect the method in short hole or space in the record in long hole.
Figure 22 is the sequential chart of the processing example of expression circuit block shown in Figure 21.
Figure 23 is the sequential chart of the processing example of expression reset pulse generative circuit 426 shown in Figure 21.
Embodiment
Below, with reference to accompanying drawing device for optical information recording of the present invention is elaborated.In addition, the present invention is not limited to the form of implementation of following explanation, can carry out suitable change.
Fig. 1 is the block diagram of the inner structure of expression driving of the present invention.As shown in Figure 1, this drives 100, uses the laser by laser diode 110 outputs, and CD 500 is carried out recording of information and reproduction, and carries out the transmitting-receiving of data between the external device (ED) such as personal computer 600.
When CD 500 is carried out recording of information, the record data that received from personal computer 600 via interface circuit 218, encode by EFM coder/decoder 216, by these record data of having encoded being handled with CPU212, thereby determine to become strategy for the record condition of this CD 500, convert this strategy to recording impulse by pulse generation circuit 300, this recording impulse is outputed to LD driver 124.
On the other hand, when the information that is write down on to CD 500 was reproduced, reproduction laser light via collimation lens 112, diffraction grating 114, half-reflecting mirror 116, object lens 118, shone CD 500 from laser diode 110.
At this moment, the low laser of laser intensity when reproduction laser light is used than record from the reflected light based on this reproduction laser light of CD 500, via object lens 118, half-reflecting mirror 116, be subjected to light microscopic 120, is subjected to light by wave detector 122, converts electric signal to.
By the electric signal of wave detector 122 output, corresponding with the logging mode with the hole that is recorded on the CD 500, space, this electric signal, and then is exported as reproducing signal by EFM coder/decoder 216 decoding backs by binaryzation by limiter (slicer) 210.
Fig. 2 is the exploded perspective view that expression is loaded into the structure of the light picker in the driving shown in Figure 1.As shown in Figure 2, be arranged at the diffraction grating between the card of laser diode 110 and CD 500, constitute, on each diffraction grating, be formed with direction different ditch 115-1,115-2 respectively by 2 diffraction grating 114-1,114-2.
When the diffraction grating that laser 20 incidents constitute like this, be branched off into 3 road laser by the 1st diffraction grating 115-1, and then, be branched off into 3 road laser by the 2nd diffraction grating 115-2 again, on the card of CD, irradiate 5 some 20A～20E.
Fig. 3 is the planimetric map that expression is radiated at the configuration of the point on the card of CD.As shown in Figure 2, on the card of CD 500, irradiation have record with main beam 20A, follow the tracks of with preceding side beam 20B, follow the tracks of with back side beam 20C, reproduce with preceding side beam 20D, reproduce use after side beam 20E.
Herein, main beam 20A used in record, is radiated on the groove 502-2 that is formed on the CD 500, by the irradiation of this beam spot, forms hole 506 in groove 502-2.Main beam 20A used in this record, in order to form the hole based on heat pattern, is set at the highest luminous intensity.
Follow the tracks of with preceding side beam 20B, be radiated on bank (land) 504-3 with the groove 502-2 adjacency of being shone by main beam 20A, follow the tracks of with back side beam 20C, be radiated at the bank with the groove 502-2 adjacency of being shone by main beam 20A, promptly be on the bank 504-2 of opposition side with the groove that is shone by side beam 20B.
Reproduce with preceding side beam 20D, be radiated on the identical groove 502-2 of the groove that shone with main beam 20A, than on the forward position of main beam 20A, reproduce with back side beam 20E, be radiated on the position on the groove 502-2 identical, after leaning on than main beam 20A with the groove that is shone by main beam 20A.
Configuration each point like this, thus can detect formed logging mode to reproduce with back side beam 20E by main beam 20A, promptly by the logging mode that combination constituted in hole 506 and space 508.
Fig. 4 is the concept map that expression is radiated at the relation of point on the card of CD and wave detector.As shown in Figure 4, wave detector 122 shown in Figure 1 is made of these 5 light accepting parts of 122A～122E, and the reflected light 22A～22E corresponding with 20A～20E shines each light accepting part respectively, is converted into electric signal.
Fig. 5 is the concept map of the relation in expression shape of recording impulse and constant zone.As shown in Figure 5, drive the recording impulse of 124 outputs by LD shown in Figure 1, various shapes are arranged, have respectively the state of opening of expression recording impulse high output area 50, expression off status low output area 52 and modulate few constant output zone 54 for opening state.
More particularly, (a) of Fig. 5, for under the state of opening, constituting the recording impulse of constant output, (b) of Fig. 5 is at forefront and follow-up the recording impulse that intensity has nothing in common with each other, (c) of Fig. 5, for at forefront, pars intermedia and follow-up the recording impulse that intensity has nothing in common with each other, (d) of Fig. 5 for having formed at forefront after the constant output portion, makes output that the recording impulse that changes for several times take place in follow-up portion.
Therefore the present invention wishes to generate gate signal described later corresponding to high output area 50 because intention under the state that recording impulse becomes out, is taken into reproducing signal, but more wishes to generate corresponding to being difficult for being subjected to the constant output zone 54 of modulation effects.This constant output zone 54 is defined as the interval of the length of the most constant state in the high output area 50 for convenience, still, even the interval short constant zone longer than steady state also can be used as the constant output zone and uses.In addition, in the explanation afterwards, the pulse shape that is called as castle (castle) type in (c) with Fig. 5 is that example describes, but the present invention also goes for other recording impulse.
For example, also can be set at following such structure: when being applicable to the employed recording power of CD of phase-change type as shown in Figure 5, as long as pass through high output and low output repeatedly, reply being equivalent in recording impulse, eliminate the constant output zone 54 of power and generate gate signal, and be taken into the signal that reproduces with side beam to this constant output zone 54 and get final product.Wherein, recording impulse has: high output area 50, the output that becomes amorphous (amorphous) state after the phase-change material quenching is used for the constant output zone 54 of carrying out the low output area 52 of the power about 0.7～1mW of servo-controlled degree and slowly becoming crystalline state after the cooling with main beam.
Fig. 6 is the circuit block diagram of the inner structure of expression pulse generation circuit shown in Figure 1.As shown in Figure 6, in this pulse generation circuit 300, receive policy condition SD1, the SD2 that sends from the CPU212 of Fig. 1 respectively, generate synchronous with clock signal clk pulse signal PW1, PW2 by pulse unit generative circuit 310-1,310-2.
Herein, policy condition SD1, SD2, be with during the opening of pulse and the length during closing, as defining with the represented numeric data of clock number, pulse unit generative circuit 310-1, the 310-2 of these signal datas have been accepted, the clock signal clk that use is generated in driving, the pulse signal of the condition that generation strategy condition SD1, SD2 are represented.
These pulse signals PW1, PW2 are output to the LD driver 124 of Fig. 1, and with the logic product that logical multiply (AND) arithmetical unit 316 is got inversion signal and the pulse signal PW2 of pulse signal PW1, output to the screened circuit 400 of Fig. 1 as gate signal Gate.In addition, the inversion signal of pulse signal PW1 generates by negative circuit 314.
Fig. 7 is the sequential chart of the generation notion of expression gate signal shown in Figure 6.Shown in each figure among Fig. 7 like that, with the corresponding gate signal in constant output zone of recording impulse, use the formation recording impulse inscape pulse signal PW1, PW2 and generate.That is, like that, pulse signal PW1, PW2 generate synchronously with the clock signal clk of Fig. 7 (a) as (b) of Fig. 7 and (c), are generated the inversion signal shown in (d) of Fig. 7 by this pulse signal PW1.
Then, as long as define level between the inversion signal shown in (d) of pulse signal PW2 and Fig. 7 of (c) of Fig. 7 like that shown in each figure among Fig. 7, and fetch logic amasss, and just can obtain the gate signal shown in (e) of Fig. 7.Consequently, such gate signal that obtains will be corresponding with the constant output zone of recording impulse.
Fig. 8 is the circuit diagram of the inner structure of expression LD driver shown in Figure 1.As shown in Figure 8, LD driver 124, has the bleeder circuit that has used resistance R 1, R2, with the compositor 126 of synthetic these output voltages, from pulse signal PW1, the PW2 of pulse generation circuit 300, via resistance R 1, R2, after being amplified to predetermined output level, by compositor 126 combinators and, generate recording impulse PWR, output to the laser diode 110 of Fig. 1.
Fig. 9 is the circuit block diagram of the inner structure of expression screened circuit shown in Figure 1.As shown in Figure 9, screened circuit 400, constitute by 2 logical multiply arithmetical unit 410-1,410-2, the gate signal Gate that generates by the pulse generation circuit 300 of Fig. 1, the elementary logical multiply arithmetical unit 410-1 of marking signal Flag input that generates with the CPU212 of Fig. 1, get the gate signal Gate ' of the logic product of the marking signal Flag that the CPU212 of gate signal Gate that the pulse generation circuit 300 by Fig. 1 generates and Fig. 1 generates, be output to the logical multiply arithmetical unit 410-2 of back level.
Logical multiply arithmetical unit 410-2, use this gate signal Gate ', the reproduction that wave detector 122E by Fig. 4 is exported shields with the RF signal RF-Sub that back side beam 20E reproduces, and extracts the RF signal RF-Sub ' of the part corresponding with gate signal Gate ', outputs to the limiter 210 of Fig. 1.Its result owing to be to extract the RF signal RF-Sub ' that reproduces in the constant output zone of recording impulse selectively, therefore can carry out the detection in high-precision hole.
Then, according to the length and the phase information in this hole that is detected, the CPU212 of Fig. 1 calculates the correcting condition of strategy, and the policy condition that outputs to pulse generation circuit 300 is proofreaied and correct.Consequently can in the record of data, carry out record condition and obtain the real-time correction of proofreading and correct.
Figure 10 is the sequential chart of the relation between expression recording impulse and gate pulse and the reproducing signal.Like that, recording impulse PWR constitutes the pulse mode that ON/OFF changes accordingly with the data pattern of being scheduled to shown in Figure 10 (a).Herein, when hypothesis will have situation about the constant output zone 54 of the hole 14T of the longest no modulation areas using as gate signal, the gate signal Gate by the pulsing circuit 300 of Fig. 1 generates was exported with the timing shown in Figure 10 (b); Marking signal Flag by the CPU212 of Fig. 1 generates is exported with the timing shown in Figure 10 (c); The gate signal Gate ' that is generated in the screened circuit 400 of Fig. 9 by with the timing shown in Figure 10 (d) output, uses this gate signal Gate ', has extracted the result of RF-Sub signal of Figure 10 (e), forms RF-Sub ' signal of this figure (f).
So, because the final reproducing signal RF-Sub ' that extracts is the signal that reproduces in the constant output zone 54 of recording impulse PWR, therefore can carries out the detection in high-precision hole, and then can proofread and correct accurately strategy by using this signal.
Figure 11 is the concept map of the generation method of the marking signal carried out of expression CPU shown in Figure 1.Example shown in this figure, for detect selectively the constant output region memory of hole 14T the example of situation of space 14T.As shown in Figure 11, CPU212 will long value corresponding store in the storer 214 successively with the data of recording impulse, determine (in the figure at hole 14T, be expressed as " P14 ") the constant output region memory at space 4T (in Figure 11, be expressed as " L4 ") data, the data of this hole 14T that determines are set up sign.
Herein, with recording main beam when the mistiming of used side beam is defined as τ again, CPU212 converts to mistiming τ with clock number, will be present in longly from hole 14T to the data the 4T of space to compare with mistiming τ.Consequently, need only, and in the scope in the constant output zone that is equivalent to this hole 14T, have the data of space 4T, just this hole 14T is set up sign, with timing output identification signal Flag shown in Figure 10 in zone from hole 14T time departure difference τ.
Figure 12 is the sequential chart of the relation between recording main beam of expression and the used again side beam.Like that, record for the pulse mode of the needed high output in formation hole, by this pulse irradiation formed hole pattern on CD, forms shown in Figure 12 (b) such with the output of main beam shown in Figure 12 (a).
On the other hand, such shown in Figure 12 (c), reproduce output with side beam, for with record with the identical timing of output mode of main beam, form output and dwindled that part of pulse mode of branch's ratio with main beam than record, reproduce the hole pattern of reproducing with side beam by this, like that, formation has postponed the pattern of mistiming τ by the hole in the record shown in Figure 12 (d).
Therefore, detect the hole 14T record in reproduce space 4T the time, like that, the space 4T of pulse of mistiming τ that become the mode delay that only need determine to make recording impulse gets final product with regional the two position overlapped of constant output of the hole 14T of recording impulse shown in Figure 12 (e).Promptly, constant output zone by long hole in recording impulse generates the 1st gate signal, and recording impulse has been postponed in the pulse mode of mistiming τ, by being equivalent to generate the 2nd gate signal as the hole of the weak point of detected object or the pulse in space, use these the 1st gate signals and the 2nd gate signal, to becoming useful by reproducing the structure that shields with the RF signal that side beam obtained.
Figure 13 is the expression recording impulse and makes the pulse of this recording impulse delay and the sequential chart of the relation between the RF signal.Such shown in each figure of Figure 13, only need to generate to make recording impulse PWR postpone the pulse PWR ' of time τ, in the constant output zone of the hole of recording impulse PWR 14T, the part that will comprise the space 4T of delayed pulse PWR ' is set at gate signal Gate ', just can in the record in long hole, detect short hole or space selectively, consequently can detect the length variation and the phase deviation in hole exactly.
Figure 14 is the block diagram of example of having represented to detect the method in short hole or space in the record in long hole.Figure 14 is the EFM coder/decoder 216 by Fig. 1, during main beam record 14T hole, detects the structure example of the situation in the 4T space that is present under the side beam.
When constituting like this, EFM coder/decoder 216, as shown in the drawing such, will be by 82 system signals of limiter 210 input of Fig. 1, store among the impact damper 250-1 temporarily, to convert 16 data to according to conversion table 252 by 8 bit data of this impact damper output, output to impact damper 250-2.At this moment, based on the delay operation of the time T of delayer 254,, just carries out once revolution for changing once.
Store the data among the impact damper 250-2 into, be output to counter 256, as the data of the long nT of indicating impulse (n=3～14), the CPU212 through shown in Figure 1 outputs to pulse generation circuit 300, generates the recording impulse that conforms to.
Figure 15 is the block diagram of the relation between the pulse generation circuit 300 of expression counter 256 shown in Figure 14 and Fig. 1.As shown in Figure 15, counter 256 have from by impact damper 250-2 towards pulse generation circuit 300 data streams flowing, determine to be equivalent to the 14T demoder 258 of the bit string in 14T hole; 4T demoder 259 with the bit string of determining to be equivalent to the 4T space.
Figure 16 is the concept map of the example when representing impact damper 250-2 storage bit string shown in Figure 14.Shown in Figure 16 (c), like that, in impact damper 250-2, store to represent to cheat with the synchronous form of clock signal shown in (a) of Figure 16 or the data of the length in space.
For example, the length of 3T shows with " 100 "; The length of 4T shows with " 1000 "; The length of 5T shows with " 10000 "; The length of 14T shows with " 10000000000000 ".
Therefore, when importing pulse such shown in Figure 16 (b), store the bit string among the impact damper 250-2 into, such shown in Figure 16 (c), the part that is equivalent to the 4T space is " 10000 ", the part that is equivalent to the 14T hole is " 10000000000000 ", and pulse width separately is by storing with the form of figure place performance.
Herein, at recording main beam when the interval of used side beam is equivalent to 300 again, such shown in Figure 16 (c), in the bit string from be stored in impact damper 250-2, determine the position in the 14T hole in the current record, judge and leaving the bit string that whether has the 4T space on 300 bit positions from this 14T hole.
Consequently, when having the bit string in 4T space, being judged as can be in the record based on the 14T of main beam hole, detects the timing in 4T space by side beam, uses by this signal that regularly obtains and determines the condition of proofreading and correct in real time.
Figure 17 is the concept map that is illustrated in the record in 14T hole as the variation in the 4T space of detected object.Like that, serve as reasons the 2T pulse of the 3T pulse of high output, the 9T pulse of constant output, high output when constituting at the recording impulse in 14T hole shown in Figure 17 (a), the 4T space that is accommodated in the constant output zone becomes detected object.
Thereby, preferably can extract the 4T space that occurs at the central portion of 14T pulse, still since in this case occurrence probability with step-down, therefore set in advance counter circuit, also do not become the extraction object even the constant output zone in 14T hole is not overflowed at the two ends in feasible 4T space.
For example, pulse by the hole of the 14T shown in Figure 17 (a), generate the gate signal shown in (b) of Figure 17, be ready to determine to be accommodated in this gate signal data pattern in advance, extract the bit string consistent with this data pattern with the 4T space of hacures (hatch) expression of Figure 17 (c).
Figure 18 is the block diagram of other examples of having represented to detect the method in short hole or space in the record in long hole.Example shown in this figure, for the umber of pulse that in certain period, produces as benchmark, judge the example that in the record in long hole, whether has short hole or space.
In circuit block shown in Figure 180, will be by 2 system signal SLRF-Sub ' of limiter 210 outputs, via negative circuit 420-1 input logic multiplication device 422, and will be by the gate signal Gate input logic multiplication device 422 of pulse generation circuit shown in Figure 1 300 outputs.
Logical multiply arithmetical unit 422, the logic product of the signal of these inputs is outputed to set (set) terminal of counter 424, accepted the counter 424 of this signal, the umber of pulse that produces in the interval represented by the anti-phase gate signal of negative circuit 420-2 is counted, its result as judging signal Detection Enable, is outputed to the CPU212 of Fig. 1.In addition, by the anti-phase gate signal of negative circuit 420-2, use as the reset signal of counter 424.
Whether CPU212 is not less than predetermined number with this umber of pulse of judging signal indication, for example whether is not less than 2 times for benchmark, judges in the record in 14T hole whether have the 4T space, is being judged as when being, carries out being taken into of the signal that obtained by this 4T space.
Figure 19 is the sequential chart of the processing example of expression circuit block shown in Figure 180.Shown in Figure 19 (a), like that, be input to the signal RF-Sub ' in the limiter 210, be converted into 2 systems, generate pulse signal SL RF-Sub ' such shown in Figure 19 (b) at a certain level.
Then, by the logic product of the inversion signal shown in the gate signal Gate shown in (e) that get Figure 19 and this figure (f), the judgement signal DetectionEnable shown in generation Figure 19 (g).Described gate signal Gate generates from the signal shown in Figure 19 (c) and Figure 19 (d) with pulse generation circuit shown in Figure 1 300; Described inversion signal generates with negative circuit 420-1.
Figure 20 is the concept map of expression by the judgement signal judgment benchmark of the circuit block generation of Figure 18.Shown in each figure among Figure 20 like that, in this embodiment, in the interval inside counting of Figure 20 (a) during more than or equal to 2 times pulse, be judged as space in the gate signal Gate that in the record in 14T hole, has the constant zone that is accommodated in expression 14T, for example have the space of 3T～7T, carry out being taken into of the signal that obtains by this 4T space.
Therefore, such shown in Figure 20 (b),, be judged as space in the gate signal Gate that in the record in 14T hole, has the constant zone that is accommodated in expression 14T, for example have the space of 3T～7T to during 2 subpulses in the gate signal inside counting, be taken into the signal that obtains by this 4T space.On the other hand, like that, when only counting down to 1 time, be judged as in the record in 14T hole and do not have the 4T space as (c) of Figure 20 and (d), do not carry out being taken into of signal.
Figure 21 is the block diagram of other examples of having represented to detect the method in short hole or space in the record in long hole.Example shown in Figure 21 for by measure the length of the pulse that has produced in gate signal, is judged the example that whether has short hole or space in the record in long hole.
In circuit block shown in Figure 21, calculate the 2 system signal SL RF-Sub ' that export by limiter 210 by logical multiply arithmetical unit 422, with the gate signal Gate that exports by the pulse generation circuit 300 of Fig. 1, and this three's of clock signal clk logic product, as the signal Countable Pulse that can count and the set terminal of enter counter 424 is counted by the length of 424 pairs of these signals of counter.In addition, the reset pulse that generated of reset pulse generative circuit 426 is imported in this counter.
Figure 22 is the sequential chart of the processing example of expression circuit block shown in Figure 21.Shown in Figure 22 (a), like that, be input to the signal RF-Sub ' in the limiter 210, be converted into 2 systems, and generate pulse signal SL RF-Sub ' such shown in Figure 22 (b) at a certain level.
Then, by calculating by the gate signal Gate shown in the pulse generation circuit shown in Figure 1 300 (c) that generate, Figure 22, with the logic product of the clock signal clk shown in (d) of Figure 22, generate the signal Countable Pulse that can count shown in (e) of Figure 22.In addition, the clock signal of Ti Chuing uses the situation in " 1T=1 cycle " to be illustrated as an example herein, still, also can use clock more at a high speed, and for example the clock of use " 1T=40 cycle " improves the resolution characteristic of length detection.
Figure 23 is the sequential chart of the processing example of expression reset pulse generative circuit 426 shown in Figure 21.Such as shown in figure 23, reset pulse generative circuit 426, to 1 time in the clock signal clk shown in Figure 23 (a) counting 2 times, M signal CLK/2 shown in generation Figure 23 (b), and then, to 1 time in this M signal CLK/2 counting 2 times, generate the M signal CLK/4 shown in (c) of Figure 23.
Then, such shown in Figure 23 (d), the reset signal Reset that the 2nd time the rising of generation and Figure 23 (c) is synchronously risen, descended when having scanned the length that is equivalent to gate signal Gate.By the reseting terminal of this reset signal input counter 424 shown in Figure 21, the count results of counter is reset.
In addition, under the situation of the signal that uses " 1T=40 cycle " as the clock signal shown in Figure 23 (a), gate signal Gate has the width that is equivalent to 9T, when clock signal has been counted 360 times, reset signal Reset shown in Figure 23 (d) descends, and counter 424 is reset.
Similarly, under the situation of the signal that uses " 1T=2.5 cycle " as the clock signal shown in Figure 23 (a), gate signal Gate has the width that is equivalent to 9T, when clock signal has been counted 22.5 times, reset signal Reset shown in this figure (d) descends, and counter 424 is reset.Just, as " 1T=2.5 cycle ", the cycle of clock signal under the situation for the integral multiple of the long T of unit, does not just handle as integral multiple as " 2T=5 cycle ".
According to the present invention, can carry out more high-precision real-time correction, therefore can expect to apply it in the record environment that the inside and outside Zhou Jilu condition of CD changes.
Claims (9)
1. device for optical information recording, use laser with laser with reproducing with generating record after the beam of laser branch, on optical recording media, form hole and bank with the pulse irradiation of laser by above-mentioned record, carry out the detection of above-mentioned hole and/or bank by above-mentioned reproduction with the irradiation of laser simultaneously, it is characterized in that:
Above-mentioned record carries out based on the recording impulse that has high output area and these 2 output areas of low output area at least with the pulse irradiation of laser;
The detection of above-mentioned hole and/or bank, above-mentioned record shine with above-mentioned high output area with laser during in carry out.
2. device for optical information recording, use laser with laser with reproducing with generating record after the beam of laser branch, on optical recording media, form hole and bank with the pulse irradiation of laser by above-mentioned record, carry out the detection of above-mentioned hole and/or bank by above-mentioned reproduction with the irradiation of laser simultaneously, it is characterized in that:
Above-mentioned record carries out based on the recording impulse that has high output area and these 2 output areas of low output area at least with the pulse irradiation of laser;
Above-mentioned reproduction is with the pulse irradiation of laser, to carry out with the synchronous timing of the pulse irradiation of laser with above-mentioned record;
The detection of above-mentioned hole and/or bank is carried out in the high output area of above-mentioned reproduction with laser.
3. device for optical information recording, use laser with laser with reproducing with generating record after the beam of laser branch, use the pulse irradiation of laser on optical recording media, to form hole and bank by above-mentioned record, carry out the detection of above-mentioned hole and/or bank by above-mentioned reproduction with the irradiation of laser simultaneously, it is characterized in that:
Above-mentioned record carries out based on the recording impulse that has high output area and these 2 output areas of low output area at least with the pulse irradiation of laser,
The constant output zone that the level that above-mentioned high output area has above-mentioned recording impulse becomes constant,
The detection of above-mentioned hole and/or bank, above-mentioned record with laser with above-mentioned constant output area illumination during in carry out.
4. device for optical information recording, use laser with laser with reproducing with generating record after the beam of laser branch, on optical recording media, form hole and bank by above-mentioned record with the pulse irradiation of laser, carry out the detection of above-mentioned hole and/or bank by above-mentioned reproduction with the irradiation of laser simultaneously, it is characterized in that:
Above-mentioned record carries out based on the recording impulse that has high output area and these 2 output areas of low output area at least with the pulse irradiation of laser,
The constant output zone that the level that above-mentioned high output area has above-mentioned recording impulse becomes constant,
Above-mentioned reproduction is with the pulse irradiation of laser, carrying out with the synchronous timing of the pulse irradiation of laser with above-mentioned record,
The detection of above-mentioned hole and/or bank is carried out in the constant output zone of above-mentioned reproduction with laser.
5. device for optical information recording, use laser with laser with reproducing with generating record after the beam of laser branch, use the pulse irradiation of laser on optical recording media, to form hole and bank by this record, carry out the detection of above-mentioned hole and/or bank simultaneously with the irradiation of laser by above-mentioned reproduction, it is characterized in that, comprising:
Generate the pulse generation device of the recording impulse that has high output area and these 2 output areas of low output area at least; With
Use the high output area of above-mentioned recording impulse, to the shield assembly that shields with the reproducing signal that irradiation obtained of laser by above-mentioned reproduction.
6. device for optical information recording, use laser with laser with reproducing with generating record after the beam of laser branch, use the pulse irradiation of laser on optical recording media, to form hole and bank by this record, carry out the detection of above-mentioned hole and/or bank simultaneously with the irradiation of laser by above-mentioned reproduction, it is characterized in that, comprising:
Generate the pulse generation device of the recording impulse that has high output area and these 2 output areas of low output area at least;
Determine the device in the constant output zone that level in above-mentioned high output area, above-mentioned recording impulse becomes constant; And
Use the constant output zone of above-mentioned recording impulse, to the shield assembly that shields with the reproducing signal that irradiation obtained of laser by above-mentioned reproduction.
7. device for optical information recording, use laser with laser with reproducing with generating record after the beam of laser branch, use the pulse irradiation of laser on optical recording media, to form hole and bank by this record, carry out the detection of above-mentioned hole and/or bank simultaneously with the irradiation of laser by above-mentioned reproduction, it is characterized in that, comprising:
Generate the pulse generation device of the recording impulse that has high output area and these 2 output areas of low output area at least;
Use the gate signal generating apparatus of the high output area generation gate signal of above-mentioned recording impulse;
Determine above-mentioned record laser and the above-mentioned reproduction device of the mistiming of laser;
Determine to have the device of the detected object pulse shorter than above-mentioned gate signal length; And
When having considered above-mentioned mistiming,, obtain by the pick-up unit of above-mentioned reproduction with the reproducing signal that irradiation obtained of laser in above-mentioned gate signal, to comprise the timing of above-mentioned detected object pulse.
8. device for optical information recording, use laser with laser with reproducing with generating record after the beam of laser branch, use the pulse irradiation of laser on optical recording media, to form hole and bank by this record, carry out the detection of above-mentioned hole and/or bank simultaneously with the irradiation of laser by above-mentioned reproduction, it is characterized in that, comprising:
Logic by getting the 1st pulse and the 2nd pulse and, generate the pulse generation device of recording impulse;
According to above-mentioned recording impulse, carry out the device of above-mentioned record with the pulse irradiation of laser;
The inversion signal by getting above-mentioned the 1st pulse and the logic product of above-mentioned the 2nd pulse generate the gate pulse generating apparatus of gate pulse; And
According to above-mentioned gate pulse, obtain by the pick-up unit of above-mentioned reproduction with the reproducing signal that irradiation obtained of laser.
9. light information recording method, use laser with laser with reproducing with generating record after the beam of laser branch, use the pulse irradiation of laser on optical recording media, to form hole and bank by above-mentioned record, carry out the detection of above-mentioned hole and/or bank by above-mentioned reproduction with the irradiation of laser simultaneously, it is characterized in that:
Above-mentioned record carries out based on the recording impulse that has high output area and these 2 output areas of low output area at least with the pulse irradiation of laser,
The detection of above-mentioned hole and/or bank, above-mentioned record with laser with above-mentioned high output area irradiation during in carry out.
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| JP2004186496 | 2004-06-24 | ||
| JP186496/2004 | 2004-06-24 | ||
| JP264180/2004 | 2004-09-10 |
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| CN100351920C true CN100351920C (en) | 2007-11-28 |
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| US5267226A (en) * | 1987-12-03 | 1993-11-30 | Canon Kabushiki Kaisha | Optical information recording and reproducing apparatus with switchable spot-functions |
| JPH06111361A (en) * | 1992-09-24 | 1994-04-22 | Canon Inc | Optical information recording and reproducing device |
| EP0698880A2 (en) * | 1994-08-26 | 1996-02-28 | Nippon Conlux Co., Ltd. | Optical information recording device and method |
| JPH09147361A (en) * | 1995-11-28 | 1997-06-06 | Sony Corp | Optical disk recorder |
| CN1395236A (en) * | 2001-05-11 | 2003-02-05 | 索尼公司 | Disk drive device |
| CN1455395A (en) * | 2002-05-02 | 2003-11-12 | 日本先锋公司 | Information recording and reproducing apparatus and information recording method |
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- 2005-06-08 CN CNB2005100751336A patent/CN100351920C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5267226A (en) * | 1987-12-03 | 1993-11-30 | Canon Kabushiki Kaisha | Optical information recording and reproducing apparatus with switchable spot-functions |
| JPH06111361A (en) * | 1992-09-24 | 1994-04-22 | Canon Inc | Optical information recording and reproducing device |
| EP0698880A2 (en) * | 1994-08-26 | 1996-02-28 | Nippon Conlux Co., Ltd. | Optical information recording device and method |
| JPH09147361A (en) * | 1995-11-28 | 1997-06-06 | Sony Corp | Optical disk recorder |
| CN1395236A (en) * | 2001-05-11 | 2003-02-05 | 索尼公司 | Disk drive device |
| CN1455395A (en) * | 2002-05-02 | 2003-11-12 | 日本先锋公司 | Information recording and reproducing apparatus and information recording method |
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