CN101046992B - Suspension CDROM on-line regulating method and equipment - Google Patents
Suspension CDROM on-line regulating method and equipment Download PDFInfo
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- CN101046992B CN101046992B CN200610134307A CN200610134307A CN101046992B CN 101046992 B CN101046992 B CN 101046992B CN 200610134307 A CN200610134307 A CN 200610134307A CN 200610134307 A CN200610134307 A CN 200610134307A CN 101046992 B CN101046992 B CN 101046992B
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- rom drive
- torquer
- multidimensional
- base station
- joins
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- 230000001105 regulatory Effects 0.000 title claims abstract description 9
- 239000000725 suspension Substances 0.000 title claims description 18
- 230000003287 optical Effects 0.000 claims abstract description 38
- 238000003825 pressing Methods 0.000 claims description 24
- 210000001847 Jaw Anatomy 0.000 claims description 23
- 210000000078 Claw Anatomy 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 238000005304 joining Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims 1
- 238000007689 inspection Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 239000000700 tracer Substances 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
Abstract
The present invention discloses a suspended optical drive on-line regulation method and its equipment. Said regulation method includes the following steps: (a), assembling suspended optical drive, including optical drive base seat, optical head base station, ACT suspended over the optical head base station and main shaft motor; (b), fixing optical drive, making ACT be connected with precision regulation device, making upper surface centre of optical head object lens on the ACT be positioned in the crossed position of the tax axis and thetay axis of precision regulation device, making optical head be connected with DVD playback machine; (c), placing optical disk, utilizing DVD playback machine to drive optical drive, coarse-adjusting height of ACT, adding focusing servo, fine-adjusting height of ACT, making direct component of current flowing through focusing coil be zero; adjusting RF output maximum value, regulating horizontal position of ACT, making PD offset parameter be qualified;adding tracking servo, regulating inclined angle of ACT, and making dither value of optical head be minimum; and (d), making ACT be fixed on optical head base station.
Description
Technical field:
The present invention relates to a kind of CD-ROM drive method of adjustment and equipment, especially a kind of multidimensional torquer (ACT) is in suspended state, utilize the DVD complete machine to drive shaven head, the method and apparatus of adjusting for the parameter value of height, inclination angle and the photodetector of object lens.
Background technology:
Tracer signal or when playing the signal write down on the CD signal record surface must guarantee to shine on the CD signal record surface from the laser vertical that shaven head shines out, and promptly object lens on the shaven head and CD signal record surface will keep being parallel to each other; In addition, for disk reading capacity that improves laser head and the accuracy that reads information, will be under focusing coil have situation that electric current flows through, the focus that sees through the object lens light beam is dropped on the CD signal record surface, like this, in the CD-ROM drive production run, all need the depth of parallelism between bare headed object lens and the CD signal record surface and highly adjust, be i.e. tilt adjustments and height control.
At present, existing method of adjustment is earlier head assemblies (comprise bare headed base station and be fixed on multidimensional torquer on the bare headed base station etc.) to be adjusted to its various performance parameters the best on optical head adjustment machine, and then optical head assembly and CD-ROM drive base, spindle motor etc. be assembled into CD-ROM drive, carry out tilt adjustments, height control.The CD-ROM drive tilt adjustments is mainly taked following dual mode: a kind of is the inclination screw of adjusting on the spindle motor, makes the plane parallel at plane, rotary-tray place (cd side) and spindle in optical disc drive and countershaft place; Another kind is the inclination screw of adjusting on spindle in optical disc drive and the countershaft, makes main shaft parallel with rotary-tray plane (cd side) with plane, countershaft place.Yet existing CD-ROM drive method of adjustment exists following problem:
1. the optical head assembly is adjusted on optical head adjustment machine, what the motor on the optical head adjustment machine adopted is precision electric motor, optical disc tray also has strict technical requirement, so CD mechanism on the optical head adjustment machine, no matter be to shake or on off-centre at face, therefore all to be better than spindle motor and rotary-tray on the CD-ROM drive far away, on optical head inspection accent machine, adjust to the optical head of optimum condition, install on the CD-ROM drive and can not reach perfect condition;
2. the optical head assembly will be adjusted (inspection) and CD adjustment (inspection) two adjustment (inspection) process through DVD, adds the CD-ROM drive adjustment, needs more high precision to adjust equipment, production cost height;
3. existing CD-ROM drive by adjustment screw on adjustment main shaft and the countershaft is adjusted mode can not guarantee that height control reaches best, make a mistake when making the information of optical head on reading CD even can not read out information on the CD, cause reading the ability drop of optical disc information.
Summary of the invention:
The present invention is in order to solve existing in prior technology the problems referred to above, a kind of adjusting process is simple, precision is high, cost is few suspension CDROM on-line regulating method and equipment to be provided.
Technical solution of the present invention is: a kind of suspension CDROM on-line regulating method is characterized in that having the following steps:
A. assemble suspension CDROM, comprise CD-ROM drive base, bare headed base station, be suspended in multidimensional torquer and spindle motor on the bare headed base station;
B. fixing CD-ROM drive joins multidimensional torquer and precision adjustment unit, makes the bare headed object lens upper surface on the multidimensional torquer be centered close to precision adjustment unit θ x axle and θ y axis quadrature place, and shaven head and DVD player are joined;
C. place CD, DVD player drives CD-ROM drive, and it is servo to add focusing after the coarse adjustment multidimensional torquer height, accurate adjustment multidimensional torquer height, and making the DC component that flows through focus coil current is zero; Transfer radiofrequency signal output maximal value, adjust multidimensional torquer horizontal level, make the offset parameter of photodetector qualified; Add tracking servo, adjust multidimensional torquer angle of inclination, make the jitter value minimum of shaven head;
D. the multidimensional torquer is fixed on the bare headed base station.
The DVD player of can computerizeing control detects and also shows DC component value that flows through focus coil current and the offset parameter that calculates photodetector.
The online adjustment equipment of a kind of suspension CDROM, substrate 1 is arranged, slide rail 2 is arranged on the substrate 1, slide rail 2 is provided with precision adjustment unit pedestal 3, the pull bar of the precision adjustment unit pedestal 3 and first cylinder 4 joins, the pull bar and the 3rd cylinder 8 that are connected to second cylinder, 6, the second cylinders 6 with the movable adjustment platform 5 of precision adjustment unit join, and the claw of the pull bar of the 3rd cylinder 8 and multidimensional torquer jaw 7 joins with the folding of control claw; Be provided with CD-ROM drive fixed station 9, on CD-ROM drive fixed station 9, be fixed with CD-ROM drive support column 10, spindle in optical disc drive register pin 11 and bare headed base station locating piece 12, on CD-ROM drive fixed station 9, also be provided with the upright pressure device 15 of bare headed base station side-pressing device 13, CD-ROM drive base side-pressing device 14 and CD-ROM drive base; Be provided with the DVD player of joining, be connected to computing machine with DVD player with shaven head; Be connected to the low-pass filter that joins with shaven head with computing machine, be connected to oscillograph with low-pass filter.
Described bare headed base station side-pressing device 13 is to be provided with the axle sleeve mechanism 16 that is fixedly connected with CD-ROM drive fixed station 9, rotation axis 17 passes axle sleeve mechanism 16, the front end of rotation axis 17 and base station side pressure jaw 18 join, the other end and bull stick 19 join, bull stick 19 is connected on the push rod 21 by hinge 20, be connected to first extension spring 22 between bull stick 19 and the push rod 21, push rod 21 and the 6th air cylinder tie rod 23 join.
Described CD-ROM drive base side-pressing device 14 is to be provided with the four-cylinder 24 that joins with CD-ROM drive fixed station 9, be connected to horizontal movable block 25 with four-cylinder 24, laterally on the movable block 25 upright guide rail 26 is arranged, be equipped with vertical movable block 27 on the upright guide rail 26, be fixed with side pressure jaw 28 on the vertical movable block 27, the lower end of vertical movable block 27 is connected with roller 29, roller 29 places on the curve boss 30 that is fixed on CD-ROM drive fixed station 9, is connected to second extension spring 31 of vertical setting between vertical movable block 27 and the horizontal movable block 25.
The upright pressure device 15 of described CD-ROM drive base is to be provided with the base 32 that joins with CD-ROM drive fixed station 9, the upright jaw 33 of pressing joins by hinge 34 and base 32, the upright jaw 33 of pressing is provided with deep-slotted chip breaker 35, the pin 37 that is fixed on the 5th air cylinder tie rod 36 places in the deep-slotted chip breaker 35, and the 5th air cylinder tie rod 36 joins with cylinder 38.
The present invention compares with prior art, has following advantage:
1. driving CD-ROM drive by DVD player adjusts, promptly be under real work (online) state and adjust at CD-ROM drive, can avoid the error of using the adjustment of optical head adjustment machine to bring, can make the parameters reach best, improve optical head reads information on the discs on the DVD complete machine ability widely;
2. only need once to adjust, need not to adjust steps such as (inspection) shaven head, CD-ROM drive adjustment, not only simplified adjusting process but also reduced the input of made with high precision equipment, thereby reduced production cost of products through CD with DVD player.
Description of drawings:
Fig. 1 is an embodiment of the invention device structure synoptic diagram.
Fig. 2 is an embodiment of the invention device structure vertical view.
Fig. 3 is an embodiment of the invention schematic block circuit diagram.
Fig. 4 is an embodiment of the invention base station side-pressing device structural representation.
Fig. 5 is an embodiment of the invention CD-ROM drive base side-pressing device structural perspective.
Fig. 6 is the front elevation of embodiment of the invention CD-ROM drive base side-pressing device structure.
Fig. 7 is the upright pressure device structural representation of embodiment of the invention CD-ROM drive base.
Fig. 8 is an embodiment of the invention suspension CDROM structural representation.
Embodiment:
Below in conjunction with description of drawings the specific embodiment of the present invention.As shown in Figure 1, 2, 3: adjustment equipment of the present invention is that substrate 1 is arranged, slide rail 2 is arranged on the substrate 1, slide rail 2 is provided with precision adjustment unit pedestal 3, the pull bar of the precision adjustment unit pedestal 3 and first cylinder 4 joins, be connected to second cylinder 6 with the movable adjustment platform 5 of precision adjustment unit, the pull bar of second cylinder 6 and the 3rd cylinder 8 join, and the claw of the pull bar of the 3rd cylinder 8 and multidimensional torquer jaw 7 joins with the folding of control claw; Be provided with CD-ROM drive fixed station 9, on CD-ROM drive fixed station 9, be fixed with CD-ROM drive support column 10, spindle in optical disc drive register pin 11 and bare headed base station locating piece 12, on CD-ROM drive fixed station 9, also be provided with the upright pressure device 15 of bare headed base station side-pressing device 13, CD-ROM drive base side-pressing device 14 and CD-ROM drive base; Be provided with the DVD player of joining with shaven head, be connected to computing machine with DVD player, the decoding circuit and the shaven head of DVD player join, and control circuit and computing machine join; Be connected to the low-pass filter that joins with shaven head with computing machine, be connected to oscillograph with low-pass filter.
Spindle in optical disc drive register pin 11 and bare headed base station locating piece 12 are assurances of sub-base of CD-ROM drive and bare headed base station location thereof, must be benchmark with spindle in optical disc drive register pin 11 and bare headed base station locating piece 12, be in identical position to guarantee the bare headed base station on every suspension CDROM.
For being in course of adjustment, make the bare headed object lens upper surface on the multidimensional torquer be centered close to precision adjustment unit θ x axle and θ y axis quadrature place, in assembling process, use calliper and guarantee that multidimensional torquer jaw 7 is in above-mentioned position.
Precision adjustment unit adopts Japan to produce the accurate platform of adjusting of E2600N-R type, and wherein each sequence number knob is respectively: the coarse regulation of 39-X direction, and the accurate adjustment of 40X direction is whole, the coarse regulation of 41Y direction, the accurate adjustment of 42Y direction is whole, the coarse regulation of 43-height (Z) direction; The accurate adjustment of 44-height (Z) direction is whole; The tilt adjustments of 45-θ y direction; The tilt adjustments of 46-θ x direction.
Shaven head base station side-pressing device 13, CD-ROM drive base side-pressing device 14, the upright pressure device 15 of CD-ROM drive base can be prior aries, as long as bare headed base station, CD-ROM drive base can be fixed.
Shaven head base station side-pressing device 13 also can be as shown in Figure 4: be provided with the axle sleeve mechanism 16 that is fixedly connected with CD-ROM drive fixed station 9, rotation axis 17 passes axle sleeve mechanism 16, the front end of rotation axis 17 and base station side pressure jaw 18 join, the other end and bull stick 19 join, bull stick 19 is connected on the push rod 21 by hinge 20, be connected to first extension spring 22 between bull stick 19 and the push rod 21, push rod 21 and the 6th air cylinder tie rod 23 join.
CD-ROM drive base side-pressing device 14 also can be shown in Fig. 5,6: be to be provided with the four-cylinder 24 that joins with CD-ROM drive fixed station 9, be connected to horizontal movable block 25 with four-cylinder 24, laterally on the movable block 25 upright guide rail 26 is arranged, be equipped with vertical movable block 27 on the upright guide rail 26, be fixed with side pressure jaw 28 on the vertical movable block 27, the lower end of vertical movable block 27 is connected with roller 29, roller 29 places on the curve boss 30 that is fixed on CD-ROM drive fixed station 9, is connected to second extension spring 31 of vertical setting between vertical movable block 27 and the horizontal movable block 25.
The upright pressure device 15 of CD-ROM drive base also can be as shown in Figure 7: be provided with the base 32 that joins with CD-ROM drive fixed station 9, the upright jaw 33 of pressing joins by hinge 34 and base 32, the upright jaw 33 of pressing is provided with deep-slotted chip breaker 35, and the pin 37 that is fixed on the 5th air cylinder tie rod 36 places in the deep-slotted chip breaker 35.
The structure of suspension CDROM is as shown in Figure 8: comprise that CD-ROM drive base, bare headed base station 48 and spindle motor are equal to the identical CD-ROM drive assembly of prior art, in fact be exactly to be placed on the bare headed base station multidimensional torquer 49 unfixing, just by four leads focusing coil, the tracking coil of multidimensional torquer 49 and the optical head circuit part that is installed in bare headed base station bottom are linked to each other, multidimensional torquer wherein (English Actuator) is abbreviated as the multidimensional torquer.
Concrete method of adjustment is:
A. assemble suspension CDROM, comprise CD-ROM drive base, bare headed base station 48, be suspended in multidimensional torquer 49 and spindle motor on the bare headed base station 48,
B. suspension CDROM to be adjusted is put on the CD-ROM drive support column 10 on the CD-ROM drive fixed station 9 and and locatees by spindle in optical disc drive register pin 11.At this moment, the horizontal movable block 25 of four-cylinder 24 drivings that joins with CD-ROM drive fixed station 9 moves, when the recess that moves to curve boss 30, vertical movable block 27 is along laterally having upright guide rail 26 to move down on the movable block 25, and the pulling force of extension spring 31 makes side pressure jaw 28 push down the CD-ROM drive base; The 5th cylinder 38 drives the 5th air cylinder tie rod 36, the five air cylinder tie rods 36 drive pins 37 and slides in deep-slotted chip breaker 35, drives the upright jaw 33 of pressing and pushes down the CD-ROM drive base downwards.
The running motor that the DVD player of joining with shaven head drives on the CD-ROM drive makes bare headed base station partly move to the position that bare headed base station locating piece 12 limits, the 6th cylinder 47 drives the 6th air cylinder tie rod 23 and moves ahead, the 6th air cylinder tie rod 23 drives push rod 21 and moves ahead, under the effect of extension spring 22, bull stick 19 rotates along hinge 20, and base station side pressure jaw 18 is fixed bare headed base station.
First cylinder, 4 driving precision adjustment unit pedestals 3 move ahead along slide rail 2 and put in place, the upper-lower position of second cylinder, 6 control multidimensional torquer jaws 7, the 3rd cylinder 8 control multidimensional torquer jaws 7 are clamped the multidimensional torquer that is in suspended state afterwards, and the bare headed object lens upper surface on the multidimensional torquer is centered close to precision adjustment unit θ x axle and θ y axis quadrature place.
C. place CD, DVD player drives CD-ROM drive, after treating that DVD player is returned parameter values about the relative CD position of multidimensional torquer object lens, by adjusting the knob 43 of precision adjustment unit, i.e. coarse adjustment multidimensional torquer height makes the waveform on the display that joins with computing machine equidistant; This computer-chronograph sends to add to the DVD player machine and focuses on servo order, and continuation adjustment accurate adjustment knob 44 makes and shows on the display that the current dc component that flows through focusing coil is approximately zero.Adjust knob 45,46, detect by oscillograph, the radiofrequency signal RF amplitude maximum that shaven head is sent, deliver to electric signal Va, Vb, Vc, Vd on the shaven head of computing machine by observing by low-pass filter, whether the parameter PDX and the PDY that confirm photodetection sensor in the optical head exceed standard, exceed standard, then the respective knob in the rotary knob 39,40,41,42 compensates.The computer command DVD player adds tracking servo afterwards, continues to adjust knob 45,46 and makes the jitter value (Jitter) of optical head reach minimum simultaneously on θ x direction and θ y direction.
The d.DVD player stops action, removes CD, makes the glue sclerosis to injecting glue position injecting glue, UV irradiation, and multidimensional torquer jaw 7 unclamps and withdraws from, and carries out the inspection of an optical head performance parameter again.
For easy to adjust, can before adjusting, demarcate CD-ROM drive, with master gauge to the movable adjustment platform 5 that is used to adjust precision adjustment unit in the horizontal direction four knobs 39,40,41,42 of position carry out the benchmark location, consistent with the distance that arrives bare headed base station reference field to guarantee the object lens center with design load to the distance of bare headed main shaft, and write down this moment scale value A, carry out mark, be decided to be the reference position of these several knobs, need to reset after each the adjustment.
For multidimensional torquer jaw can clamp the multidimensional torquer smoothly, usually knob 43,44,45,46 also needs to reset carrying out next CD-ROM drive when adjusting.The precision of coarse adjustment knob 39,41,43 reaches 100um, and the precision of accurate adjustment knob 40,42,44 reaches 2um.
Claims (6)
1. suspension CDROM on-line regulating method is characterized in that having the following steps:
A. assemble suspension CDROM, comprise CD-ROM drive base, bare headed base station, be suspended in multidimensional torquer and spindle motor on the bare headed base station;
B. fixing CD-ROM drive joins multidimensional torquer and precision adjustment unit, makes the bare headed object lens upper surface on the multidimensional torquer be centered close to precision adjustment unit θ x axle and θ y axis quadrature place, and shaven head and DVD player are joined;
C. place CD, DVD player drives CD-ROM drive, and it is servo to add focusing after the coarse adjustment multidimensional torquer height, accurate adjustment multidimensional torquer height, and making the DC component that flows through focus coil current is zero; Transfer radiofrequency signal output maximal value, adjust multidimensional torquer horizontal level, make the offset parameter of photodetector qualified; Add tracking servo, adjust multidimensional torquer angle of inclination, make the jitter value minimum of shaven head;
D. the multidimensional torquer is fixed on the bare headed base station.
2. suspension CDROM on-line regulating method according to claim 1 is characterized in that: the computer control DVD player, detection also shows the DC component value that flows through focus coil current and the offset parameter that calculates photodetector.
3. suspension CDROM on-line regulating method equipment according to claim 1, it is characterized in that: substrate (1) is arranged, slide rail (2) is arranged on the substrate (1), slide rail (2) is provided with precision adjustment unit pedestal (3), precision adjustment unit pedestal (3) joins with the pull bar of first cylinder (4), be connected to second cylinder (6) with the movable adjustment platform (5) of precision adjustment unit, the pull bar of second cylinder (6) and the 3rd cylinder (8) join, and the claw of the pull bar of the 3rd cylinder (8) and multidimensional torquer jaw (7) joins with the folding of control claw; Be provided with CD-ROM drive fixed station (9), on CD-ROM drive fixed station (9), be fixed with CD-ROM drive support column (10), spindle in optical disc drive register pin (11) and bare headed base station locating piece (12), on CD-ROM drive fixed station (9), also be provided with the upright pressure device (15) of bare headed base station side-pressing device (13), CD-ROM drive base side-pressing device (14) and CD-ROM drive base; Be provided with the DVD player of joining, be connected to computing machine with DVD player with shaven head; Be connected to the low-pass filter that joins with shaven head with computing machine, be connected to oscillograph with low-pass filter.
4. the online adjustment equipment of suspension CDROM according to claim 3, it is characterized in that: described bare headed base station side-pressing device (13) is to be provided with the axle sleeve mechanism (16) that is fixedly connected with CD-ROM drive fixed station (9), rotation axis (17) passes axle sleeve mechanism (16), the front end of rotation axis (17) and base station side pressure jaw (18) join, the other end and bull stick (19) join, bull stick (19) is connected on the push rod (21) by hinge (20), be connected to first extension spring (22) between bull stick (19) and the push rod (21), push rod (21) joins with the 6th air cylinder tie rod (23).
5. according to claim 3 or the online adjustment equipment of 4 described suspension CDROMs, it is characterized in that: described CD-ROM drive base side-pressing device (14) is to be provided with the four-cylinder (24) that joins with CD-ROM drive fixed station (9), be connected to horizontal movable block (25) with four-cylinder (24), laterally on the movable block (25) upright guide rail (26) is arranged, be equipped with vertical movable block (27) on the upright guide rail (26), be fixed with side pressure jaw (28) on the vertical movable block (27), the lower end of vertical movable block (27) is connected with roller (29), roller (29) places on the curve boss (30) that is fixed on CD-ROM drive fixed station (9), is connected to second extension spring (31) of vertical setting between vertical movable block (27) and the horizontal movable block (25).
6. the online adjustment equipment of suspension CDROM according to claim 5, it is characterized in that: the upright pressure device (15) of described CD-ROM drive base is to be provided with the base (32) that joins with CD-ROM drive fixed station (9), the upright jaw (33) of pressing joins by hinge (34) and base (32), the upright jaw (33) of pressing is provided with deep-slotted chip breaker (35), and the pin (37) that is fixed on the 5th air cylinder tie rod (36) places in the deep-slotted chip breaker (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610134307A CN101046992B (en) | 2006-11-20 | 2006-11-20 | Suspension CDROM on-line regulating method and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610134307A CN101046992B (en) | 2006-11-20 | 2006-11-20 | Suspension CDROM on-line regulating method and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101046992A CN101046992A (en) | 2007-10-03 |
| CN101046992B true CN101046992B (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610134307A Active CN101046992B (en) | 2006-11-20 | 2006-11-20 | Suspension CDROM on-line regulating method and equipment |
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| Country | Link |
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| CN (1) | CN101046992B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001331948A (en) * | 2000-05-22 | 2001-11-30 | Sony Corp | Device for adjusting lens skew and method for adjusting lens skew |
| KR20020076925A (en) * | 2001-03-31 | 2002-10-11 | 삼성전기주식회사 | Tilt Detector and Tilt Detection Method |
| CN1423257A (en) * | 2001-12-01 | 2003-06-11 | 三星电子株式会社 | Driver for optical pick-up device |
-
2006
- 2006-11-20 CN CN200610134307A patent/CN101046992B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001331948A (en) * | 2000-05-22 | 2001-11-30 | Sony Corp | Device for adjusting lens skew and method for adjusting lens skew |
| KR20020076925A (en) * | 2001-03-31 | 2002-10-11 | 삼성전기주식회사 | Tilt Detector and Tilt Detection Method |
| CN1423257A (en) * | 2001-12-01 | 2003-06-11 | 三星电子株式会社 | Driver for optical pick-up device |
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| Publication number | Publication date |
|---|---|
| CN101046992A (en) | 2007-10-03 |
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