CN100527234C - Method for setting laser power in optical disc drive - Google Patents

Method for setting laser power in optical disc drive Download PDF

Info

Publication number
CN100527234C
CN100527234C CNB2006100776554A CN200610077655A CN100527234C CN 100527234 C CN100527234 C CN 100527234C CN B2006100776554 A CNB2006100776554 A CN B2006100776554A CN 200610077655 A CN200610077655 A CN 200610077655A CN 100527234 C CN100527234 C CN 100527234C
Authority
CN
China
Prior art keywords
data
power
laser power
fpdo
previously stored
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNB2006100776554A
Other languages
Chinese (zh)
Other versions
CN1892843A (en
Inventor
卢尚澈
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi LG Data Storage Korea Inc
Original Assignee
Hitachi LG Data Storage Korea Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi LG Data Storage Korea Inc filed Critical Hitachi LG Data Storage Korea Inc
Publication of CN1892843A publication Critical patent/CN1892843A/en
Application granted granted Critical
Publication of CN100527234C publication Critical patent/CN100527234C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
    • A43B13/18—Resilient soles
    • A43B13/181—Resiliency achieved by the structure of the sole
    • A43B13/182—Helicoidal springs
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
    • A43B13/18—Resilient soles
    • A43B13/187—Resiliency achieved by the features of the material, e.g. foam, non liquid materials
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
    • A43B13/18—Resilient soles
    • A43B13/20—Pneumatic soles filled with a compressible fluid, e.g. air, gas
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/38—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process
    • A43B13/40—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process with cushions

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)

Abstract

A method for setting a laser power of an optical disc drive is provided. To perform a label-printing operation on a label surface of an optical disc, an optical pickup unit is shifted to a control feature zone of the label surface, and a laser power operation is performed prior to initiating label printing using power setup data and sensitivity related to an internal laser diode sensor of the optical pickup unit detected during manufacture of the optical disc drive. Alternatively, power setup data associated both a data surface and a label surface of the optical disc may be detected and stored during manufacture of the optical disc drive, and a laser power of predetermined magnitude may determined based on the power setup data previously stored in association with the seated surface of the optical disc. The power setup data may be represented by a substantially linear equation relating the input voltage to the output laser power. Therefore, an optimum laser power for a label surface may be determined prior to actually printing an image on the label surface, thus minimizing error associated with the output laser power, and enhancing label-printing quality.

Description

The method of laser power is set in CD-ROM drive
Technical field
The present invention relates to the method to set up of laser power, relate in particular to the method that the laser output power level is set in CD-ROM drive.
Background technology
Recently, the label of having developed on the data surface that permission is recorded in data disc and will having had a desired design is imprinted on the reverse side on disc data surface or the CD on non-data or the label surface.The disc surface that is printed on label thereon is called as the label surface of disc.Usually use laser ablation technology (often being called as light carving LightScribe) can be with label transfer to the label surface of disc, and wherein laser is ablated image or etched on specially prepd on the CD, the non-data one side.
In general, must change with other recording medium characteristics based on writing speed in the laser power of CD identifying recording layer.Usually use controlled integrated circuit (IC) radio frequency (R/F) input voltage (DAC) on the magnitude of expectation, laser power to be set.Yet the laser power of given input voltage (DAC) is exported actual magnitude can be based on the difference of optical pickup apparatus and R/F IC characteristic and deviation and change.Therefore, during CD-ROM drive is made, just for each device measuring input voltage (DAC) be relevant to the relation between the actual output laser power (P) of this input voltage (DAC) and it is stored among the ROM (ROM (read-only memory)), thereby can output laser power that expect magnitude be set based on measurement result.
Usually during making, measures CD-ROM drive actual output laser power in order to calculate the relation between input voltage and the output laser power, just use the equipment (for example laser powermeter) that aims at this purpose design.The relation that imposes between the laser power that the input voltage of R/F IC and optical pickup apparatus generate is linear to small part usually.Therefore, set up this kind relation by the linear equation about input voltage (DAC) and laser power (P) of the power setting of reconnaissance in the widely-used reflection manufacture process.
When the label printed at the label surface of CD such as above-mentioned light carving, with regard to use input voltage and in the CD-ROM drive manufacture process linear relationship between the detected expectation laser power calculate input voltage corresponding to the expectation laser power.The input voltage of calculating is imposed on R/F IC, thereby can use the laser power of predetermined magnitude to carry out the label preparation operation.
Yet the operation of this kind label preparation requires the output power of laser instrument to be much higher than the required power of the common operation of executive logging on the disc data surface.If as shown in Figure 1, the output valve of laser instrument surpasses predetermined value based on the increase of input voltage, be linear relationship no longer just between input voltage and the laser power then, and the output laser power just reduces gradually to input voltage ratio (being slope).Thus, if input voltage and the linear relationship of output between the laser power change, then can set up in the process and produce by formula Δ P in laser power Error=P Actual-P DesirableShown non-anticipation error, this has just caused the deterioration of printing quality on the disc label surface.
Foregoing is included in this with for referencial use, is applicable to other or optionally details, characteristic and/or technical background.
Summary of the invention
The objective of the invention is to address the above problem at least and/or shortcoming and hereinafter described advantage is provided at least.
Therefore, thus the object of the present invention is to provide a kind of laser power that is provided with to carve on the disc method of printing the high-quality label at light.
Another object of the present invention is to provide a kind of method that is used to be provided with laser diodes power, can correctly export desired high output laser power when making on light carving disc prints labels.
According in this specific implementation and broadly described the present invention, but being used to be provided with storage power wherein sets up the laser power method of CD-ROM drive of the sensitivity data of data and laser diode internal sensor and comprise: control uses power to set up data and the sensitivity data presumptive area inner control laser power at label surface, if and, just carry out the label preparation operation in the label area in label surface if light carving disc is positioned on the label surface of CD-ROM drive.
In certain embodiments, can during the CD-ROM drive manufacturing, detect and storage power is set up data and sensitivity, and the linear equation that roughly is that can use that indication input value and output concerns between the laser power represents that described power sets up data.
In certain embodiments, presumptive area can be with by laser power control caused by operations laser not export the zone that reacts, such as the control characteristic zone.
In certain embodiments, the control of laser power is comprised: the desired value of calculating sensor output valve, the output valve of wherein said sensor is corresponding to the output laser power that will use sensitivity data to be provided with; Calculating is used to generate the input value that will use power to set up the output laser power of data setting, the input value operation laser diode that use is calculated, the sensor output value that the desired value that detecting sensor output valve and use simultaneously calculated is relatively measured, being higher than under the situation of calculating desired value subsequently according to comparative result control laser power, and at the survey sensor output value increases laser power.
In certain embodiments, can during the CD-ROM drive manufacturing, detect and storage power set up data and sensitivity, and the linear equation that roughly is that can use that indication input value and output concerns between the laser power represents that described power sets up data, detect simultaneously and store with at least one preferably the power that is associated of at least two output laser power zones set up data.
In certain embodiments, output laser power territorial classification can be become comprise the first area and the second area that comprises second recording power that is used for light carving disc label surface of first recording power that is used for the video disc recording surface.
In certain embodiments, detecting power independently in the output laser power zone of predetermined number sets up data cell and store detected power and set up data cell and can comprise: the value in hope is included in respective regions will be generated the output laser power that generation place detects two predetermined input values, and on the basis of two predetermined input values and the described output laser power that records, calculate linear equation, and store the linear equation of calculating about input value and output laser power relation.
Alternatively, detecting power independently in the output laser power zone of predetermined number sets up data cell and store detected power and set up data cell and can comprise: the value in hope is included in respective regions will be generated the output laser power that generation place detects predetermined input value, and on the basis of slope characteristics between the output laser power of being scheduled to input value, detection and input value and the output laser power, calculate linear equation, and store the linear equation of calculating about input value and output laser power relation.
Alternatively, detecting power independently in the output laser power zone of predetermined number sets up data cell and stores detected power and set up data cell and can comprise: detect the output laser power that is associated with predetermined input value, second input value of the measured laser power that search generates from the storage curve data, calculate the difference between second input value and the predetermined input value, calculate the linear equation that concerns about CD input value and output laser power in this difference on the linear equations based with storing, and store the linear equation of calculating.
Additional advantages of the present invention, purpose and characteristic will obtain part in the following description and illustrate, and can be clear that these advantages of the present invention, purpose and characteristic when the content of those skilled in the art below checking or by enforcement the present invention.Objects and advantages of the present invention can accomplished and acquisition the specifically noted in appending claims.
Description of drawings
With reference to following accompanying drawing, will describe the present invention in detail, wherein identical numeral refers to components identical, wherein:
Fig. 1 is the graph of a relation between input voltage (DAC) and the laser power (P);
Fig. 2 is the CD-ROM drive block diagram that can realize therein according to the laser power method for building up of the embodiment of the invention;
Fig. 3 is a kind of according to an embodiment of the invention method flow diagram that is used to be provided with the CD-ROM drive laser power;
Fig. 4 shows the layout of typical CD label surface;
Fig. 5 is the graph of a relation between laser power (P) and the FPDO voltage;
Fig. 6 shows the layout in the control characteristic zone of typical CD shown in Figure 4;
Fig. 7 is a kind of according to an embodiment of the invention method flow diagram that is used to be provided with the CD-ROM drive laser power;
Fig. 8 is the graph of a relation between input voltage and the laser power according to an embodiment of the invention, wherein uses described laser power to determine at minimum and the highest linear function with reference to the laser power level place;
Fig. 9 is an input voltage and be relevant to nonlinear relationship figure between the laser power of three equipment according to an embodiment of the invention;
Figure 10 is the form that the practical laser power when realizing method is according to an embodiment of the invention compared with the laser power output of using classic method; And
Figure 11 is the diagram of list data shown in Figure 10.
Embodiment
Fig. 2 is the block diagram that can realize therein according to the CD drive (ODD) of the laser power method for building up of the embodiment of the invention.ODD can comprise having Zeng Yi ﹠amp; Automated power control (APC) circuit 20 of S/H (sampling/maintenance) unit 21 and amplifier (OP-AMP); Optical pick-up unit 30 with laser diode (LD) driver 31 and preceding photoelectric detector (FPD) 32; Be used to detect preceding Photoelectric Detection output (FPDO) by the signal level of FPD32 output; Storer 51 such as flash rom; And microprocessor 50.
APC circuit 20 generates laser power voltage (VMDC) on the basis of input FPDO signal and input voltage (WDAC) signal.LD drives the light beam of 31 outputs corresponding to output laser power voltage VWDC.The light beams that the FPD32 detection is generated by LD driving 31 are also exported the FPDO signal corresponding to tested light beam.Detected power was set up data during storer 51 was stored in the ODD manufacturing, and the sensitivity data " m " of storage LD sensor (not shown), and described sensor comprises in the LD of optical pick-up unit 30 (not shown).Microprocessor 50 uses the above-mentioned value that is stored in the storer 51 to carry out power on the label surface of CD 10 and sets up operation, and carries out the label preparation operation by the output laser power that above-mentioned power foundation operation is determined.
According to a further embodiment of the invention, can during ODD makes, detect the power that is relevant to disc data surface and label surface and set up data cell and it is stored in the storer 51.Microprocessor 50 can be set up the laser power level that data determine to be relevant to these CD 10 data surfaces or label surface based on the above-mentioned power that is stored in the storer 51 subsequently.
Suppose to set up laser power and equal recording power substantially, so just can impose on recording power and reproducing power to the method that is used to be provided with the output laser power according to one embodiment of the invention in the above-mentioned identical mode of laser power of setting up.
APC 20 is included in the interior laser power of predetermined magnitude that also requires of R/F IC of ODD so that ODD carries out data recording operation on disc 10.Laser power is determined by the input voltage (WDAC) of APC 20, and can be remained on the level of constant by APC 20.
The FPDO signal is corresponding to the laser beam output power that is driven 31 generations and presented back by FPD32 by LD.Input voltage (WDAC) is corresponding to setting up laser power.APC 20 generates the FPDO signal of present back from FPD 32, and corresponding to the laser power output signal (VWDC) via the input voltage (WDAC) of external number weighted-voltage D/A converter (DAC) (not shown) reception.
Fig. 3 is a kind of according to an embodiment of the invention method flow diagram that is used to be provided with the CD-ROM drive laser power.
During making, sets up ODD the linear equation of a laser power that generates about the input voltage WDAC that imposes on R/F IC with by optical pick-up unit 30.If optical pick-up unit 30 generates laser power (P1) based on the input voltage that imposes on R/FIC (WDAC1), microprocessor 50 Laser Measurement power (P1) then are simultaneously based on calculate the sensitivity m that is associated with optical pick-up unit 30 by FPDO detecting device 40 detected FPDO values (F1) after being generated by FPD 32.
Microprocessor 50 can use appropriate measuring equipment (for example laser powermeter) Laser Measurement power (P1), and use is determined sensitivity m with the information that optical pick-up unit 30 each assembly (for example LD sensor) are associated.Microprocessor 50 can use the predetermined equation of formula 1 expression to come meter sensitivity m.
M=(2.5-F1)/P1 (formula 1)
The power that detects during ODD makes and comprise the sensitivity m of linear equation relevant with input voltage and laser power and LD sensor is set up data and can be stored in the storer 51.
Referring now to Fig. 3 a kind of according to an embodiment of the invention method that is used to be provided with the CD-ROM drive laser power is described.
Put into ODD if will comprise the CD 10 of label surface (such as above-mentioned light carving), then determine at step S10 microprocessor 50 whether the surface of putting into of CD 10 is label surfaces.As shown in Figure 4, the label surface of disc 10 comprises control characteristic zone that wherein records speed control information and media information and the label area of carrying out the label preparation operation therein.If what put at step S10 place is label surface, then optical pick-up unit 30 is switched to the control characteristic zone of CD 10 at step S11 place microprocessor 50, and according to carrying out the power trace operation at embodiments of the invention that describe in detail thereafter.
Microprocessor 50 is arranged on carries out the required output laser power of label preparation operation on the label surface of disc 10, and calculates corresponding to this at step S12 place the target FPDO value of exporting laser power is set.In one embodiment of the invention, this output laser power can be 60mW.Yet other value also is suitable.Can be by the predetermined Equation for Calculating target FPDO of formula 2 expressions.
F (X)=-m*X+2.5 (formula 2)
In formula 2, X equals to export laser power, and m equals the LD transducer sensitivity, and f (X) equals the FPDO value corresponding to output laser power X.Can be in the value of storer 51 stored X and m.Relation between output laser power and the FPDO as shown in Figure 5.
At step S12 place, microprocessor 50 uses the power that is stored in the storer 51 to set up data and calculates corresponding to the input electricity (WDAC) of exporting laser power.In the case, power is set up data just corresponding to the linear equation of setting up during making at ODD about input voltage and laser power.
Microprocessor 50 is given the OP Amp 22 of APC 20 input voltage (WDAC) of calculating.The laser power voltage (VWDC) that APC 20 generates corresponding to this input voltage.At step S13 place, the luminous bundle that LD driver 31 generates corresponding to output laser power voltage (VWDC).
FPD 32 detects the luminous bundle that is generated by LD driver 31 and exports corresponding FPDO signal.At step S14 place, FPDO detecting device 40 detects the value of output FPDO signal, and sending to microprocessor 50 by the convenient FPDO value of being surveyed that is called as current FPDO is discussed.
At step S20 place, the value of microprocessor 50 comparison object FPDO and the value of current FPDO.If the value of target FPDO is greater than the value of current FPDO, microprocessor 50 is not done variation with regard to keeping the output laser power of having set up.Yet,, increase the output laser power with regard to the difference between the value of the value of based target FPDO and current FPDO by the increase predetermined value at step S21 place microprocessor 50 if the value of target FPDO is equal to or less than the value of current FPDO.Repeat the aforesaid operations step to set up the laser power of expectation.
Need be higher than the required output laser power of data surface in label preparation operating period.Usually surpass predetermined value if make laser output increase based on the increase of input voltage, just as above with reference to the figure 1 described linear relationship that can't set up between input signal and the output signal, this has just caused laser power to set up non-anticipation error in the process.Though provide high output laser power so can be label preparation, but still can realize that above-mentioned power foundation operation is used for laser output power and roughly free from error optimum value with foundation.
Fig. 6 shows the detailed structure in the control characteristic zone of CD (such as above-mentioned light carving disc) label surface.The control characteristic zone comprises the speed control characteristic zone, control characteristic outer region and mirror area.
Microprocessor 50 moves to the control characteristic zone with optical pick-up unit 30 and carries out above-mentioned laser power and set up operation in the control characteristic zone.The index marker that microprocessor 50 control optical pick-up units 30 detect from index marker pattern in the control characteristic outer region, detecting the spoke value at index marker pattern section start is 0 spoke, and carries out the synchronous operation of reading the medium id information from a series of medium id fields.
Determine best output laser power if set up operation by above-mentioned power, then optical pick-up unit 30 is moved to the label area of CD 10, and use the output laser power of being adjusted by above-mentioned power establishment step S14, S20 and S21 to carry out label preparation at step S23 place and operate at step S22 place microprocessor 50.In the label preparation operating process, will be determined the level that the output laser power remains on constant by APC 20.
Even because when power is set up operation, also may on label surface, generate the track or the mark of non-expectation,, optical pick-up unit 30 sets up operation to carry out power so moving to the control characteristic zone of label surface.Only the label preparation operation guide can be gone into the label area that has deposited at first on it the responsive dyestuff of laser output.Dyestuff only can be deposited on the label area part of disc label surface, and can not be deposited on the control characteristic zone.
According to another embodiment of the invention, can during ODD make, detect and be stored in the first required power of disc data surface recording data and set up data and set up data at the second required power of disc label surface prints labels.Set up data by the power of selecting of classifying based on the difference of recording operation, determine corresponding laser power.
The magnitude of the input voltage (DAC) that is associated with input voltage (DAC) can be based on the difference of optical pickup apparatus and R/F IC feature and is changed.At these contradiction, can be during ODD makes carry out laser power and set up and operate for each equipment, detect and store input voltage simultaneously and corresponding to the relation between the practical laser power of input voltage.Can carry out laser power at the first reference record power place that is used for the data of optical disk surface and set up operation, and this operation also can be carried out at the second reference record power place that be used for the CD label surface, sets up data thereby can detect and store second power that first power that is used for the data surface record sets up data and be used for the label surface record.In one embodiment of the invention, the first reference record power is about 20mW, and the second reference record power is about 40mW.Yet also can use other suitable values.
Fig. 7 is a kind of according to an embodiment of the invention method flow diagram that is used to be provided with CD-ROM drive (ODD) laser power, also will be described with reference to figure 2 thereafter.
During ODD makes, be based upon the low output reference record power (P that CD 10 data surfaces use L) carry out laser power foundation operation, still can be based upon the height output reference record power (P that CD 10 label surfaces use H) carry out this operation.As shown in Figure 8, based on reference record performance number P LAnd P HDetection is used for the output laser power value P1-P4 of predetermined input voltage DAC1-DAC4 accordingly.Can be confirmed as power corresponding to the linear function of tested output laser power value P1-P4 sets up data and is respectively stored in the storer 51 at step S30 place.
More specifically, be separated from each other and can be imposed on R/F IC in proper order by predetermined value DAC_L, and can detect actual output laser power value P1 and P2 by equipment such as laser powermeter at this two the input voltage DAC1 and DAC2 that can generate expectation low output reference record power (such as 20mW).Above-mentioned two input voltage DAC1 and DAC2 should be near the values low output reference laser power.If for the purpose of discussing, suppose that low output reference laser power is 20mW, then DAC1 and DAC2 just can be for example 15mW and 25mW.Two are used for linear equation
Y=ax+b (formula 3)
Value a and b, y=output laser power wherein, and x=output voltage, can by 2 points (DAC1, P1) and (DAC2, P2) definite y and x calculate, and the result that will calculate is stored in the storer 51 and sets up data as the power that is used for data surface.Can simply calculate the input voltage (for example 20mW) that generates low output reference laser power based on above-mentioned function, and the input voltage value of calculating is set up data storage in storer 51 as power.
Be separated from each other and can be imposed on R/F IC in proper order by predetermined value DAC_H, and can detect actual output laser power value P3 and P4 at this two the input voltage DAC3 and DAC4 that can generate expectation high output reference record power (such as 40mW).Above-mentioned two input voltage DAC3 and DAC4 should be near the values height output reference laser power.If for the purpose of discussing, suppose that high output reference laser power is 40mW, then DAC3 and DAC4 just can be for example 35mW and 45mW.Two are used for linear equation
Y=cx+d (formula 4)
Value c and d can by 2 points (DAC3, P3) and (DAC4, P4) determined value is calculated, and the result that will calculate is stored in the storer 51 and sets up data as the power that is used for label surface.Similarly, can simply calculate the input voltage (for example 40mW) that generates high output reference laser power based on above-mentioned function, and the input voltage value of calculating is set up data storage in storer 51 as power.Though export the reference record power that reference record power is called label surface for convenient height with 40mW is discussed, maximal value also is suitable for conduct with reference to recording power less than other values of the output laser power of about 70mW.
So, have the power of in manufacture process, storing and be used for data surface and label surface and set up the CD-ROM drive (ODD) of data and can set up data based on above-mentioned power suitable laser output power level is set, and can carry out the label preparation operation in the operation of data surface executive logging and/or at label surface.
At step 40 place CD 10 is put into CD-ROM drive, and determine at step 50 place microprocessor 50 whether the CD 10 that is placed into comprises data surface and label surface (such as above-mentioned light carving disc).If the CD 10 that is placed at step 50 place comprises data surface and label surface, then determine at step 60 place microprocessor 50 whether the surface that CD 10 is put into is label surface.The position of reflecting surface is with different from those of the light volume reflection of incident label surface laser beam and data surface, so just can determine the surface of putting into of CD 10 based on different reflecting surface positions and reflected light easily.
Microprocessor 50 subsequently based on correspondingly put into the data that the surface is associated from what be stored in that a plurality of power in the storer 51 set up data cell, the laser power with expectation tolerance is set, and carries out appropriate recording operation.More specifically, if determine that at step S60 place the surface of putting into of CD 10 is label surfaces, then detect input voltage (DAC) corresponding to recording laser power at step S61 place microprocessor 50, wherein said recording laser power be associated from being stored in the label surface that storer 51 interior a plurality of power set up in the data cell.Detected input voltage (DAC) is applied to the OPAmp 22 that is included in the APC 20.APC 20 generates the FPDO signal present back by FPD32 and corresponding to the laser power voltage (VWDC) of input voltage, thereby is in the recording operation that execution such as label preparation is operated on the label surface of CD 10 at step S62.
If determine that at step S70 place the surface of putting into of CD 10 is data surfaces, then microprocessor 50 detects the input voltage (DAC) corresponding to recording laser power at step S71 place, wherein said recording laser power be associated from being stored in the label surface that storer 51 interior a plurality of power set up in the data cell.Detected input voltage (DAC) is applied to the OP Amp 22 of APC 20.Generation is by the laser power voltage (VWDC) corresponding to input voltage (DAC), and in step S72 executive logging operation on data surface.
The laser power that can carry out in a different manner during CD is made is set up operation.
Fig. 9 is an input voltage (DAC) and be used for nonlinear relationship figure between the laser power (P) of three equipment according to an embodiment of the invention.To small part because the feature that is associated with optical pick-up unit, and more specifically because the laser diode feature of optical pick-up unit, so three curves are more or less similar mutually.Suppose to discern the slope characteristics of the linear function of indicating input voltage and output laser power relation, so just can under the situation that only detects the output laser power that is associated with predetermined input voltage in each equipment, discern described linear function.Based on the result of aforementioned analysis, just can detect and store the slope characteristics that is associated with each data surface and label surface in advance.When carrying out laser power foundation operation, just can be each data surface and label surface and detect the output laser power that is used for predetermined input voltage.
More specifically, set up operating period in laser power, second input voltage (DAC6) that is used for first input voltage (DAC5) of data surface reference record power and is used for label surface reference record power is imposed on R/F IC in proper order, and can use the suitable equipment such as laser powermeter to detect corresponding actual output laser power value P5 and P6.The above-mentioned linear function that is used for data surface and label surface is respectively:
Y=ax+b (formula 3)
Y=cx+d (formula 4)
Wherein x equals DAC, y equals laser power, and a and c represent the slope characteristics of pre-stored, and b and d then can calculate from output laser power value P5 and P6, and can use input voltage DAC5 and DAC6 to calculate corresponding power and set up data, and subsequently it is being stored in the storer 51.
Can carry out the laser power that during CD-ROM drive is made, imports in a different manner and set up operation.
Three curve representations shown in Fig. 9 funtcional relationship independently between input voltage and the laser power, and what some is similar each other.That is to say, if predetermined curve moves along the input voltage axle or along the laser power axle, then with other curves much at one.Therefore, if only measure a point in the pre-stored average or average place that is used for some optical pick-up units being relevant to funtcional relationship between input voltage and the laser power, so just can calculate input voltage easily and be used for funtcional relationship between the laser power of definite optical pick-up unit for predetermined optical pick-up unit.
Can measure and storage package is contained in some spots in the averaged curve or the funtcional relationship between input voltage and the laser power.Calculate first linear function (all) to make near the curve linearization low output reference laser power at least and second linear function (all) that can make near the curve linearization of high output reference laser power at least based on these points, and these result of calculations are stored in the storer suc as formula 4 suc as formula 3.
When carrying out laser power foundation operation, R/F IC is applied predetermined input voltage (DAC7) and detects the actual laser power (P7) of exporting for predetermined CD-ROM drive.As shown in Figure 9, under the situation of averaged curve, the predetermined number of the output laser power indication P7 that when applying predetermined input voltage (DAC7), generates.Predetermined input voltage (DAC7) can be at first input voltage that can generate low output reference laser power and can generate predetermined value between second input voltage of high output reference laser power.
With reference to the curve S among the figure 91, corresponding to the output laser power of predetermined input voltage (DAC7) by a P S1Expression, point (DAC7, P S1) be positioned on the averaged curve S1, and be output laser power P on the averaged curve S1The input voltage that provides is DAC S1Therefore, (be DAC if averaged curve is moved to the left the distance of g1 S1To DAC7), it just roughly overlaps with curve S 1 so.
With reference to the curve S among the figure 92, corresponding to the output laser power of predetermined input voltage (DAC7) by a P S2Expression, point (DAC7, P S2) be positioned under the averaged curve S1, and be output laser power P on the averaged curve S2The input voltage that provides is DAC S2Therefore, the distance of g2 (is DAC7 to DAC if averaged curve moves right S2), it just roughly overlaps with curve S 1 so.
Suppose to be illustrated near the low output reference laser power that is relevant to averaged curve first linear function, and be illustrated near the height output reference laser power that is relevant to averaged curve second linear function by y=cx+d by formula y=ax+b.
The first and second linear function values and correlation curve S1 can be calculated by first equation y=a* (x+g1)+b and the second equation y=c* (x+g1)+d respectively.The result is, represented the value of first linear function and represented the value of second linear function by y=c*x+d+c*g1 by y=a*x+b+a*g1.
The value that is relevant to first and second linear functions of curve S 2 can be calculated by equation y=a* (x-g2)+b and y=c* (x-g2)+d respectively.The result is, represented the value of first linear function and represented the value of second linear function by y=c*x+d-c*g2 by y=a*x+b-a*g2.Therefore, slope a and c do not change, and only are that y y-intercept value b and d change.Under the situation of curve S 1, y y-intercept value is represented by b '=b+a*g1 and d '=d+c*g1.Under the situation of curve S 2, y y-intercept value is by b "=b-a*g2 and d "=d-c*g2 represents.
Therefore, when during CD-ROM drive is made, carrying out laser power foundation operation, just the output laser power that only is associated can be measured easily, and near the linear function each low output reference laser power and high output reference laser power can be calculated easily with an input voltage.
Figure 11 is that the practical laser power when realizing method is according to an embodiment of the invention compared and the diagram shown in the tabulation in Figure 10 with the laser power output of using classic method.As shown in Figure 10 and Figure 11, be better than prior art aspect departing from according to the sum of errors of method between target power and output power of the embodiment of the invention, because the laser power error that the present invention produces is less than prior art.When the height of for example 60mW output laser power is in the label surface record data, according to the actual output laser power of the embodiment of the invention than prior art more near the laser power of 60mW.In addition, the deviation that the present invention who illustrates exports laser power is less than the deviation of prior art.
Apparent from the above description, a kind of method that is used to be provided with the CD-ROM drive laser power according to the present invention can determine that the optimal laser power of label surface need not to form at label surface the error of figure and energy minimization output laser power, thereby causes improving label preparation operation and label quality.
Aforesaid embodiment and advantage only are that exemplary not being interpreted as will limit the present invention.Principle of the present invention can be easy to be applied to the device of other type.Explanation of the present invention be intended to indicative and and the scope of unrestricted claims.It is for a person skilled in the art, many that to substitute, revise and change all will be tangible.In claims, that the means-plus-function clause is intended to cover is described herein, as the structure of carrying out the function of being quoted from, and not only the covered structure equivalence also covers equivalent construction.

Claims (10)

1. method that is used for impressing pattern on the label surface of CD-R comprises:
Optical pickup units is moved to the control characteristic zone of label surface;
Read previously stored power from storer and set up data and previously stored Electrophotosensitive degrees of data, described previously stored Electrophotosensitive degrees of data is the sensitivity data of the laser diode sensor of storage during CD-ROM drive is made, and it is that the power of the linear relationship between expression input voltage of storing during the CD-ROM drive manufacturing and corresponding output laser power is set up data that described previously stored power is set up data;
Set up data and the preceding Photoelectric Detection output of previously stored Electrophotosensitive degrees of data calculating FPDO desired value from described previously stored power;
Detect the FPDO currency;
FPDO desired value and FPDO currency are compared;
Based on the result of described comparison, increase or maintenance foundation output laser power;
To set up the output laser power, carry out label preparation.
2. the method for claim 1, its characteristic are, under the situation of FPDO desired value greater than the FPDO currency, keep described foundation output laser power.
3. the method for claim 1 is characterized in that, under the situation of FPDO desired value less than the FPDO currency, increases described foundation output laser power.
4. the method for claim 1, it is characterized in that previously stored Electrophotosensitive degrees of data that is associated with the laser diode of CD-ROM drive and previously stored power are set up data and comprised that the sensitivity data of the described label surface that relates separately to described CD and power sets up data.
5. the method for claim 1 is characterized in that, described CD-R is a light carving disc.
6. device that is used for impressing pattern on the label surface of CD-R comprises:
Optical pickup units;
Microprocessor, configuration is used to control described optical pickup units; And
Storer, configuration is used for previous storage power and sets up data and previous storage Electrophotosensitive degrees of data, described previously stored Electrophotosensitive degrees of data is the sensitivity data of the laser diode sensor of storage during CD-ROM drive is made, and it is that the power of the linear relationship between expression input voltage of storing during the CD-ROM drive manufacturing and corresponding output laser power is set up data that described previously stored power is set up data;
Wherein, described microprocessor configuration is used for optical pickup units is moved to the control characteristic zone of label surface; Read previously stored power from storer and set up data and previously stored Electrophotosensitive degrees of data; Set up data and the preceding Photoelectric Detection output of previously stored Electrophotosensitive degrees of data calculating FPDO desired value from described previously stored power; Detect the FPDO currency; FPDO desired value and FPDO currency are compared; Based on the result of described comparison, increase or maintenance foundation output laser power; To set up the output laser power, carry out label preparation.
7. device as claimed in claim 6 is characterized in that, described microprocessor, and configuration is used for described foundation output laser power being remained on its current level in the FPDO desired value under greater than the situation of FPDO currency.
8. device as claimed in claim 6 is characterized in that, described microprocessor, and configuration is used for increasing described foundation output laser power by a predetermined value in the FPDO desired value under less than the situation of FPDO currency.
9. device as claimed in claim 6, it is characterized in that, described previously stored sensitivity data that is associated with the CD-ROM drive laser diode and described previously stored power in the storer are set up data, comprise that the previously stored sensitivity data and the power of the described label surface that relates separately to described CD is set up data.
10. device as claimed in claim 6 is characterized in that, described CD-R is a light carving disc.
CNB2006100776554A 2005-04-29 2006-04-24 Method for setting laser power in optical disc drive Expired - Fee Related CN100527234C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1020050035811 2005-04-29
KR1020050035811A KR100653492B1 (en) 2005-04-29 2005-04-29 Method for setting laser power in optical disc drive
KR1020050049095 2005-06-09

Publications (2)

Publication Number Publication Date
CN1892843A CN1892843A (en) 2007-01-10
CN100527234C true CN100527234C (en) 2009-08-12

Family

ID=37597614

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2006100776554A Expired - Fee Related CN100527234C (en) 2005-04-29 2006-04-24 Method for setting laser power in optical disc drive

Country Status (2)

Country Link
KR (1) KR100653492B1 (en)
CN (1) CN100527234C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100925215B1 (en) * 2007-12-20 2009-11-06 주식회사 히타치엘지 데이터 스토리지 코리아 Apparatus and method for printing label image
DE102019208760A1 (en) * 2019-06-17 2020-12-17 Carl Zeiss Microscopy Gmbh Method and optical arrangement for determining a resulting power of a radiation in a sample plane

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960029633U (en) * 1995-02-07 1996-09-17 Disk recognition device using bar code
US7671880B2 (en) * 2003-01-17 2010-03-02 Hewlett-Packard Development Company, L.P. Optical disk labeling system and method

Also Published As

Publication number Publication date
KR20060113020A (en) 2006-11-02
CN1892843A (en) 2007-01-10
KR100653492B1 (en) 2006-12-05

Similar Documents

Publication Publication Date Title
CN101010739A (en) Focus control for a medium scanning system
US7301869B2 (en) Spherical aberration correcting method and apparatus
CN101116140A (en) Methods and apparatus to compensate for power output variations over time
CN100505049C (en) Optical information recording device, optical information recording method, and information processing circuit
CN100527234C (en) Method for setting laser power in optical disc drive
US7532228B2 (en) Method for setting laser power in optical disc drive
CN1273981C (en) Method and apparatus for identifying optical record medium type
EP1705658A2 (en) Method for setting laser power in optical disc drive
CN1150551C (en) Optical recording method and apparatus using this method
US20050276212A1 (en) Information record medium, and information record apparatus and method
CN1873791B (en) Light information recording device, light information recording method and signal processing circuit
CN101088120B (en) System for scribing a visible label
US7898915B2 (en) Method and apparatus for determining recording powers for recording on an optical disc
US8094528B2 (en) Method for reading media information from optical recording media
EP1447797B1 (en) Optical disk and optical disk apparatus
US20070247512A1 (en) Track control method for marking label side of optical disc
EP1713068A1 (en) Optical pickup apparatus and controlling method thereof
EP1784823B1 (en) Focus control for a medium scanning system
US20080198711A1 (en) Power Calibration Method For Visible Label Recording
CN101083094A (en) Optical disc apparatus and recording power control method
US7573793B2 (en) Power determining method in optical disk recording apparatus having a plurality of pickups
EP1573724B1 (en) Optical record carriers
RU2375765C2 (en) Method and device for determining recording power
JP2001184689A (en) Optical disk recorder and optical disk recording method
JP4253257B2 (en) Recording power determination method and information recording apparatus

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090812

Termination date: 20120424