CN1167059C - Optical head device - Google Patents
Optical head device Download PDFInfo
- Publication number
- CN1167059C CN1167059C CNB011439912A CN01143991A CN1167059C CN 1167059 C CN1167059 C CN 1167059C CN B011439912 A CNB011439912 A CN B011439912A CN 01143991 A CN01143991 A CN 01143991A CN 1167059 C CN1167059 C CN 1167059C
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- CN
- China
- Prior art keywords
- objective carrier
- drive coil
- optical
- solenoid
- head apparatus
- 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
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- Optical Recording Or Reproduction (AREA)
Abstract
The present invention provides an optical head device for which the addition of a power supplying wire to a lens holder is not required and also no scale expansion and no weight increase of a lens holder are required, when the tilt control is performed. In the optical head device 1, two electromagnetic coils 17A, 17B for tilt control facing to the invalidated part 130 of a focusing drive coil 13 are arranged at two places on both sides of the tracking direction with respect to the lens holder 10. When power is supplied to the tilt controlling electromagnetic coils 17A, 17B under the prescribed condition in accordance with an HF amplitude signal or a jitter signal, the magnetic fluxes intersecting the null part 130 of the drive coil 13 are generated by these solenoid coils 17A, 17B, thereby couple of force is applied to the lens holder 10, and the tilt is adjusted.
Description
Technical field
The present invention relates to the record of optical recording media and the optical-head apparatus of resetting and using.More specifically, relate to the inclination control technology of in this optical-head apparatus, adjusting the inclination usefulness of the objective carrier that keeps object lens.
Background technology
The optical recording media to CD, CD-R, DVD etc. write down and the optical-head apparatus reset in, as shown in Figure 4, have the objective carrier 10 that keeps object lens 4, the fixed component 12 by 4 one metal wires, 11 these objective carriers 10 of supporting, be fixed on the drive coil 13,14 on this objective carrier 10, and the drive magnet 15 that produces the magnetic flux that this drive coil 13,14 relatively intersects.
If the optical-head apparatus 1A of Gou Chenging to focusing on drive coil 13 and following the tracks of with drive coil 14 energisings, then owing to the Lorentz force that therefore produces, can will keep the objective carrier 10 of object lens 4 to drive to focus direction (directions X) and tracking direction (Y direction) like this.
In addition, in this optical-head apparatus 1A, if optical axis 9 run-off the straights of the object lens 4 of optical recording media relatively then can hinder record and playback to optical recording media.Therefore, a kind of like this formation is disclosed in the special fair 6-68844 communique of Japan: the coil 20 of installing control usefulness in the bottom of objective carrier 10 in advance, both sides at objective carrier 10, configuration produces permanent magnet 21A, the 21B of the magnetic flux of these coil 20 intersections relatively, to these coil 20 energisings, promptly objective carrier 10 is produced the couple of the axis that extends around the Z direction, adjust the inclination of objective carrier 10.
But.Optical-head apparatus 1A shown in Figure 4 because to objective carrier 10, except focusing on drive coil 13 and following the tracks of with the drive coil 14, also is equipped with control with coil 20, so there are the following problems.At first, because added the coil 20 of control usefulness that tilts on the objective carrier 10, so must connect lead 11 again to this coil 20 power supply usefulness.Add such lead 11, cause cost to improve, and mode of resonance complicates possible deviations such as open loop characteristic.In addition, because objective carrier 10 has added the coil 20 of the control usefulness that tilts, it is heavy that objective carrier 10 correspondingly becomes therewith, so thrust descends, can not adapt to high speed.Also have, because add the coil 20 of the control usefulness that tilts, so objective carrier 10 corresponding thickenings at the downside of objective carrier 10.
Summary of the invention
In view of the problem that above prior art exists, problem of the present invention is, a kind of like this optical-head apparatus is provided, and it needn't add the lead to objective carrier power supply usefulness, and can not cause the maximization of objective carrier and the increase of weight when tilting control.
In order to solve above-mentioned problem, optical-head apparatus of the present invention, have the objective carrier that keeps object lens, by several wire elastic supporting pieces support this objective carrier fixed component, be fixed on the drive coil on the described objective carrier, and produce the magnetic flux that intersects with this drive coil, with the drive magnet of described objective carrier to focus direction or tracking direction driving, it is characterized in that also having the inclination control solenoid that the generation reaction component not relative with described drive magnet is intersected among described drive coil magnetic flux is used the inclination of adjusting described objective carrier.
In the present invention, objective carrier is not reinstalled the coil that tilts to control usefulness, and will in drive coil, the reaction component not relative be used for tilting control, replace at objective carrier next door configuration inclination control solenoid with drive magnet.Therefore, if to the control of tilting with the solenoid energising, this solenoid just produces the magnetic flux that the reaction component of relative drive coil is intersected, so objective carrier is subjected to the effect of couple (revolving force), the inclination of objective carrier obtains adjusting.Therefore, when tilting control, needn't on objective carrier etc., add coil etc.So, needn't add and connect wire elastic supporting piece to objective carrier power supply usefulness, and the control of under the situation that does not cause objective carrier to increase volume and gain in weight, tilting.
In the present invention, it is 2 places, both sides of tracking direction side that described inclination control is configured in for described objective carrier with solenoid, makes to produce the couple of adjusting described objective carrier inclination usefulness.
In the present invention, the magnetic flux that utilizes described inclination control to produce with solenoid, described reaction component is adjusted the described drive coil that described objective carrier tilts, and for example is the focusing drive coil that described objective carrier is driven usefulness to focus direction.
In the present invention, described object lens make the record surface of the relative optical recording media of optical axis vertical by utilizing the inclination control of described inclination control with solenoid.Therefore, use optical-head apparatus of the present invention if adopt, can fine record and the playback of carrying out optical recording media.
Description of drawings
Figure 1 shows that the concise and to the point pie graph of using optical-head apparatus of the present invention.
Figure 2 shows that and use the objective carrier formation key diagram on every side that optical-head apparatus of the present invention uses.
Figure 3 shows that and use another objective carrier formation key diagram on every side that optical-head apparatus of the present invention uses.
Figure 4 shows that the other objective carrier formation key diagram on every side that existing optical-head apparatus uses.
Embodiment
With reference to accompanying drawing, example of the present invention is described.
Fig. 1 and Fig. 2 are the concise and to the point pie graph of application optical-head apparatus of the present invention, and the objective carrier formation key diagram on every side of using this optical-head apparatus.
In Fig. 1, reflected by semi-permeable mirror 3 from LASER Light Source 2 emitting lasers of optical-head apparatus 1, by object lens 4 optically focused, on the information recording surface of optical recording 5, form focus.At this, object lens are kept by objective carrier described later.By object lens 4 and semi-permeable mirror 3, incided photodetector 6 by the light that returns after optical recording 5 reflections.The light that incides photodetector 6 is transformed into electric signal in this photodetector 6, be transformed into acoustic information and image information.In this device,, under must be at the optical axis of the relative record surface object lens 4 of the optical recording 5 vertical situation, make the deflecting facet or the off-centre of object lens 4 tracking illumination indicators 5 for correct playback information.That is, to focusing on mistake, must with object lens up and down direction (focus direction) drive this revised, and, object lens must be driven to horizontal direction (tracking direction) and revise this to trail-and-error.
The formation of the optical-head apparatus 1 of this form as shown in Figure 2, keep the objective carrier 10 of object lens 4 to be in and be bearing in state on the base 16 by fixed component 12 by 4 wire 11 (wire elastic supporting piece), by being fixed on the drive coil 13,14 on this objective carrier 10, and produce the drive magnet 15 of the magnetic flux of these drive coil 13,14 intersections relatively, objective carrier 10 is driven to focus direction and tracking direction.
At this, if establish focus direction, tracking direction and be respectively directions X, Y direction and Z direction with the direction of this both direction quadrature, then among the drive coil 13,14, focus on drive coil 13 relative objective carriers 10 and reel, and the side of drive magnet 15 relative objective carriers 10 is relative in Z direction side along Y direction and Z direction.Therefore, focus on in the drive coil 13, objective carrier 10 is relative with drive magnet 15 along the part of Y direction coiling relatively, and the part of reeling along the Z direction becomes the reaction component 130 not relative with drive magnet 15.
In addition, follow the tracks of and be fixed with 4 with drive coil 14 at the end face that is positioned at the Z direction of objective carrier 10, one side of each coil is relative with drive magnet 15.
Therefore, if to focusing on drive coil 13 and following the tracks of,, can will keep the objective carrier 10 of object lens 4 to drive to focus direction (directions X) and tracking direction (Y direction) owing to the Lorentz force that therefore produces with drive coil 14 energisings.
In addition, in this form, be 2 places, both sides of tracking direction (Y direction) side at relative objective carrier 10, dispose and focus on the reaction component 130 of drive coil 13 relative two tilt control solenoid 17A, 17B.
The optical-head apparatus 1 of Gou Chenging like this, if according to HF amplitude signal and deviation (jitter) signal, with defined terms the control of tilting is switched on solenoid 17A, 17B, these solenoids 17A, 17B just produce and focus on the magnetic flux that intersects with the reaction component 130 of drive coil 13, therefore, the effect of objective carrier 10 axis that is subjected to the extending couple (revolving force) of rotating around the Z direction.For example, flow through to focus on and represent with arrow i with the electric current of drive coil 13, end towards objective carrier 10 in tilting to control with solenoid 17A is the S utmost point, and the control of tilting is with being the N utmost point towards an end of objective carrier 10 among the solenoid 17B, this moment is in objective carrier 10, a side that tilts to control with solenoid 17A place is subjected to the Lorentz force shown in the arrow F1, and the side of control with solenoid 17B place then is subjected to the Lorentz force shown in the arrow F2 tilting.Therefore, objective carrier 10 rotates the angle of stipulating to the direction shown in arrow F1, the F2, and its inclination obtains adjusting.Therefore, can make the record surface of optical axis 9 relative optical recording medias of object lens 4 vertical all the time, so can write down well and reset to optical recording media.
In this external form, be used for tilting control, so needn't on objective carrier 10, add the coil of the control usefulness that tilts because will focus on reaction component 130 not relative in the drive coil 13 with drive magnet 15.Therefore, needn't add and be connected lead 11 at objective carrier 10, and the volume of objective carrier 10 can not increase, weight can not increase yet.
Other example
In addition as shown in Figure 3, in optical-head apparatus 1, also there is focusing to reel along Y direction and Z direction, and follows the tracks of with the situation of drive coil 14 along Z direction and directions X coiling with drive coil 13 relative objective carriers 10.Under situation about constituting like this, the side of drive magnet 15 relative objective carriers 10 is relative in Z direction side.
Therefore, focus on drive coil 13 relative objective carriers 10, relative in the part that the Y direction is reeled with drive magnet 15, and the part of reeling in the Z direction becomes the reaction component 130 not relative with drive magnet 15.In addition, follow the tracks of and use drive coil 14 relative objective carriers 10 relative with drive magnet 15, and the part of reeling in the Z direction becomes the reaction component 140 not relative with drive magnet 15 in the part of directions X coiling.
Therefore, at 2 places, the both sides configuration inclination control solenoid 17A that relative objective carrier 10 is tracking direction (Y direction) side, during 17B, the control solenoid 17A if configuration is tilted, 17B makes it can produce relative drive coil 13,14 reaction component 130,140 magnetic fluxs that intersect, then use solenoid 17A to tilting to control with defined terms, during the 17B energising, solenoid 17A, 17B just generation focuses on drive coil 13 relatively and follows the tracks of reaction component 130 and 140 magnetic fluxs that intersect of using drive coil 14, therefore, the axle that objective carrier 10 is subjected to extending with the Z direction is the effect of the couple (revolving force) of rotating shaft, and the inclination of objective carrier 10 obtains adjusting.
In addition, to constitute with what illustrated with reference to Fig. 2 be identical to other of the optical-head apparatus 1 shown in here, and common part is put on identical symbol, and omission is to their explanation.
As mentioned above, in the present invention, objective carrier is not reinstalled the coil that tilts to control usefulness, but reaction component not relative with drive magnet in the drive coil is used for tilting control, and replace at the other configuration inclination of objective carrier control solenoid.Therefore, in case the control of tilting is switched on solenoid, this solenoid promptly produces the magnetic flux that intersects with the reaction component of drive coil, and therefore objective carrier is subjected to the effect of couple (revolving force), and the inclination of objective carrier obtains adjusting.Therefore, when tilting control, needn't on objective carrier, add coil etc.So, needn't on objective carrier, add and the wire elastic supporting piece that is connected the usefulness of powering, and can be under the situation that the volume that does not cause objective carrier increases and weight increases, the control of tilting.
Claims (4)
1. optical-head apparatus, have the objective carrier that keeps object lens, by several wire elastic supporting pieces support this objective carrier fixed component, be fixed on the drive coil on the described objective carrier, and produce the magnetic flux that intersects with this drive coil, with the drive magnet of described objective carrier to focus direction or tracking direction driving, it is characterized in that
Also have the generation reaction component not relative with described drive magnet is intersected among described drive coil magnetic flux and use the inclination control solenoid of the inclination of adjusting described objective carrier.
2. optical-head apparatus according to claim 1 is characterized in that, it is 2 places, both sides of tracking direction side that described inclination control is configured in for described objective carrier with solenoid, makes to produce the couple of adjusting described objective carrier inclination usefulness.
3. optical-head apparatus according to claim 1, it is characterized in that, the magnetic flux that utilizes described inclination control to produce with solenoid, described reaction component is adjusted the described drive coil that described objective carrier tilts, and is the focusing drive coil that described objective carrier is driven usefulness to focus direction.
4. optical-head apparatus according to claim 1 is characterized in that, described object lens make the record surface of the relative optical recording media of optical axis vertical by utilizing the inclination control of described inclination control with solenoid.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP392451/2000 | 2000-12-25 | ||
| JP2000392451A JP2002197698A (en) | 2000-12-25 | 2000-12-25 | Optical head device |
| JP392451/00 | 2000-12-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1366302A CN1366302A (en) | 2002-08-28 |
| CN1167059C true CN1167059C (en) | 2004-09-15 |
Family
ID=18858439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011439912A Expired - Fee Related CN1167059C (en) | 2000-12-25 | 2001-12-24 | Optical head device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2002197698A (en) |
| CN (1) | CN1167059C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7164639B2 (en) | 2002-08-30 | 2007-01-16 | Sanyo Electric Co., Ltd. | Tilt control for optical disc recording and playback apparatus |
| JP2004192754A (en) | 2002-12-13 | 2004-07-08 | Sanyo Electric Co Ltd | Tilt control method for optical disk recording and playback device |
| JP2004199779A (en) | 2002-12-18 | 2004-07-15 | Sanyo Electric Co Ltd | Tilt control method for optical disk recording and reproducing device |
| US20040268373A1 (en) * | 2003-01-29 | 2004-12-30 | Samsung Electronics Co., Ltd. | Tilt drive optical pickup actuator and optical recording and/or reproducing apparatus using the same and method |
| KR100505673B1 (en) | 2003-02-21 | 2005-08-03 | 삼성전자주식회사 | Optical pickup actuator capable of driving tilt and optical recording and/or reproducing apparatus employing it |
| KR100505687B1 (en) * | 2003-06-02 | 2005-08-03 | 삼성전자주식회사 | Optical pickup actuator and optical disc drive adopting the same |
| KR100524980B1 (en) * | 2003-07-28 | 2005-10-31 | 삼성전자주식회사 | Optical actuator, optical pick-up apparatus and optical recording/reproducing apparatus |
| JP3995658B2 (en) * | 2004-02-12 | 2007-10-24 | 三洋電機株式会社 | Information recording / reproducing device |
| CN1664684B (en) * | 2005-04-15 | 2010-04-28 | 友达光电股份有限公司 | Substrate of liquid crystal display device and its manufacture method |
| US7969847B2 (en) | 2007-01-16 | 2011-06-28 | Sanyo Electric Co., Ltd. | Disc apparatus |
-
2000
- 2000-12-25 JP JP2000392451A patent/JP2002197698A/en active Pending
-
2001
- 2001-12-24 CN CNB011439912A patent/CN1167059C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002197698A (en) | 2002-07-12 |
| CN1366302A (en) | 2002-08-28 |
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| C10 | Entry into substantive examination | ||
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| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: NIDEC SANKYO CORP. Free format text: FORMER NAME OR ADDRESS: SANKYO SEIKI MFG. SEISAKUSHO K.K. |
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| CP01 | Change in the name or title of a patent holder |
Address after: Nagano Patentee after: Sankyo Seiki Seisakusho KK Address before: Nagano Patentee before: Sankyo Seiki Manufacturing Co., Ltd. |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |