CN1331135C - Power compensation circuit and method optical device having same - Google Patents
Power compensation circuit and method optical device having same Download PDFInfo
- Publication number
- CN1331135C CN1331135C CNB021424071A CN02142407A CN1331135C CN 1331135 C CN1331135 C CN 1331135C CN B021424071 A CNB021424071 A CN B021424071A CN 02142407 A CN02142407 A CN 02142407A CN 1331135 C CN1331135 C CN 1331135C
- Authority
- CN
- China
- Prior art keywords
- error signal
- servo error
- power
- value
- limit voltage
- 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
Links
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
The present invention relates to a power compensation circuit, a method and an optical device with the power compensation circuit which is used for compensating the power of a writing signal. The power compensation circuit comprises a signal pick-up circuit which is provided with a critical voltage value which can pick up values of parts of which the servo error signal exceeds the critical voltage value, the values of the parts of which the servo error signal exceeds the critical voltage value are regulated by a gaining value of a gaining set point station to generate a compensating signal, and an adder is used for adding the compensation signal to the power of the writing signal.
Description
Technical field
The present invention relates to a kind of power compensating circuit and method and have the optical devices of this power compensating circuit, more particularly, relate to use servo error signal, the power compensating circuit and the method for compensation write signal power and have the optical devices of this power compensating circuit.
Background technology
In present known optical devices, the operation that can utilize laser-optical disk (Compact Disc, beneath abbreviation CD) for example to keep a record and write is so that store needed data.The for example present known compact disc recordable (CD-Recordable is called for short CD-R) or the CD of rewritable (CD-ReWritable, CD-RW) or the like, the method for recording/reproducing data is that the utilization light beam writes or reading of data CD.
Write fashionablely for data, the Writing power of this light beam (Write Power) will be because of the factor of some operation, for example the dust that the surface had of CD or because finger touch residual finger trace or the like, and reduce or unstable.And tradition is for the compensation method of light beam Writing power, for example utilizes to write the power compensating method that radio frequency (Write Radio Frequency) signal carries out an operation best power control (Running OptimumPower Control, under be called ROPC).Yet, for some factor, for example become greatly because of the bad institute of the CD compacting servo error signal that causes, the situation that makes effective light beam Writing power minimizing, this operation best power control (ROPC) can't be in real time and is promptly obtained to compensate.
Especially after the speed or doubly fast raising of the imprinting action that keeps a record for CD at present, when just the rotating speed of Spindle Motor improves, can be because the bad unsettled phenomenon of the servo-drive system that CD caused of pressing process can get more and more, for example coil noise (Vertical orradial Noise) in vertical or radial direction, vertical missing dish (Vertical Deviation Disc), or eccentric disc (Eccentric Disc) or the like situation, then traditional power compensating method, for example above-mentioned operation best power control (ROPC) is because of can't be in real time and promptly obtain the situation generation that compensation makes the mistake.
Summary of the invention
In view of this, fundamental purpose of the present invention is to provide a kind of power compensating circuit, in order to compensate a Writing power, this power compensating circuit comprises: a servo error signal pick-up circuit, has a limit voltage value, this servo error signal pick-up circuit is in order to receiving a servo error signal, and picks up the value that this servo error signal surpasses this limit voltage value part according to this limit voltage value; One gain setting device in order to receive the value that this servo error signal surpasses this limit voltage value part, according to the value of this servo error signal above this limit voltage value part, is set yield value; And a totalizer, in order to this yield value is compensated to this Writing power.
In view of this, fundamental purpose of the present invention is to provide a kind of power compensating method, in order to compensate a Writing power, this power compensating method comprises: receive a servo error signal, and pick up the value that this servo error signal surpasses this limit voltage value part according to a limit voltage value; Receive the value that this servo error signal surpasses this limit voltage value part,, set yield value according to the value of this servo error signal above this limit voltage value part; And this yield value compensated in this Writing power.
In view of this, fundamental purpose of the present invention is to provide a kind of optical devices, be applicable to the laser beam recording/reproducing information in a record carrier of using, wherein these optical devices comprise that a power compensating circuit is in order to control the luminous power of this laser beam, wherein this power compensating circuit comprises: a servo error signal pick-up circuit, has a limit voltage value, this servo error signal pick-up circuit is in order to receiving a servo error signal, and picks up the value that this servo error signal surpasses this limit voltage value part according to this limit voltage value; One gain setting device in order to receive the value that this servo error signal surpasses this limit voltage value part, according to the value of this servo error signal above this limit voltage value part, is set yield value; And a totalizer, in order to this yield value is compensated to this Writing power.
Above-mentioned power compensating circuit or have the optical devices of this power compensator, its servo error signal comprises a focus error signal or tracking error signal (Tracking Error Signal) or the like.
In view of this, fundamental purpose of the present invention is to provide a kind of optical devices, be applicable to the light beam recording/reproducing information in a record carrier of using, wherein these optical devices comprise that a power compensating circuit is to control the luminous power of this light beam, wherein this power compensating circuit is in order to receive a servo error signal, and according to a limit voltage value, pick up the value of this servo error signal above this limit voltage value part, the value that surpasses this limit voltage value part according to this servo error signal, set yield value, and this yield value is compensated to the luminous power of this light beam.
Therefore, can be in real time according to the present invention and promptly obtain power back-off.And after the speed or doubly fast raising of the current imprinting action that keeps a record for CD, when just the rotating speed of Spindle Motor improved, the power compensating method that the invention solves prior art was because of can't be in real time and promptly obtain the situation generation that compensation makes the mistake.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 shows has the optical devices of power compensating circuit according to the preferred embodiment of the invention.
Label declaration:
Optical devices 100
Servo error signal pick-up circuit 110
Gain setting device 120
Totalizer 130
Optical recording/regenerating unit 140
Record carrier 150
Embodiment
With reference to the preferred embodiments of the present invention, its example is to be shown in the accompanying drawing in detail.During same reference numeral is used in icon and describes, to point to same or analogous part.
Of the present inventionly provide a kind of power compensating circuit, in order to compensate the power of a write signal.This power compensating circuit comprises signal pickup circuit, and it has a limit voltage value, can pick up the value that an error signal surpasses the limit voltage value part, and utilizes a gain setting device according to the value of this error signal above the limit voltage value part, sets yield value.And this yield value is compensated to the power of write signal.The error that this error signal is then produced when operating for system.
A preferred embodiment of the present invention for example can be used in the optical devices, and these optical devices are to use light beam, and for example a laser light or laser beam, to an optical record carrier, for example CD carries out recording/reproducing) device of information.And the method for this recording/reproducing is to use light beam that CD is write or reading of data.
In the optical devices of the preferred embodiment of the present invention, comprise a power compensating circuit, can be in order to the luminous power of compensation laser beam.And this power compensating circuit comprises a servo error signal pick-up circuit and a gain setting device.This servo error signal pick-up circuit in order to receiving a servo error signal, and according to having a limit voltage value, picks up the value that this servo error signal surpasses this limit voltage value part.And the error signal that this servo error signal is a servo-drive system to be produced, the servo error signal of exporting from radio frequency amplifier for example, and be to be example with the focus error signal in this embodiment.Then, this gain setting device then receive the servo error signal that picks up surpass the value of limit voltage value part, and set a yield value according to this, and this yield value is compensated to the luminous power of laser beam, use this luminous power of compensation because the influence that servo error signal caused.And the method for this compensation can be added to laser beam with yield value by a totalizer, to compensate this Writing power.
For clearly demonstrating the preferred embodiments of the present invention more, please refer to the described circuit block diagram of Fig. 1, apply to a power compensating circuit in the optical devices 100 with explanation.In these optical devices 100, comprise a power compensating circuit, can be in order to the luminous power of compensation laser beam.And this power compensating circuit comprises a servo error signal pick-up circuit 110 and a gain setting device 120.This servo error signal pick-up circuit 110 is in order to receiving a servo error signal 102, and according to have a limit voltage value, picks up the value that servo error signal 102 surpasses this limit voltage value part.And this servo error signal is the servo error signal of for example exporting from radio frequency amplifier, is example with the focus error signal at this.Then, 120 of this gain setting devices receive the value of institute's servo error signal that picks up 102 above the limit voltage value part, and set a yield value according to this, and this yield value are compensated to the luminous power of laser beam 124.And the method for this compensation can be added to laser beam 124 with yield value 122 by a totalizer 130, offers optical recording/regenerating unit 140 so that will obtain the laser beam 132 of compensation.This optical recording/regenerating unit 140 then can be according to this to record carrier 150, and for example erasable optical disk (CR-RW) is done an operation of reading or writing.
In a preferred embodiment of the present invention, gain setting device 120 is more adjusted yield value according to the characteristic of the laser optical power of optical read head (Pick-up Head) except the foundation of value as the adjustment yield value that receives institute's servo error signal that picks up 102 and surpass the limit voltage value part.
In sum; though the present invention with preferred embodiment openly as above; yet it is not in order to limit the present invention; those skilled in the art; without departing from the spirit and scope of the present invention; can do various modifications and retouching, thus protection scope of the present invention should with claim scope was defined is as the criterion.
Claims (12)
1. power compensating circuit, in order to compensate a Writing power, this power compensating circuit comprises:
One servo error signal pick-up circuit has a limit voltage value, and this servo error signal pick-up circuit is in order to receiving a servo error signal, and picks up the value that this servo error signal surpasses this limit voltage value part according to this limit voltage value;
One gain setting device in order to receive the value that this servo error signal surpasses this limit voltage value part, according to the value of this servo error signal above this limit voltage value part, is set yield value; And
One totalizer is in order to compensate to this Writing power with this yield value.
2. power compensating circuit as claimed in claim 1, wherein this servo error signal comprises a focus error signal (Focus Error Signal).
3. power compensating circuit as claimed in claim 1, wherein this servo error signal comprises a read head error signal (Pickup Head Error Signal).
4. power compensating circuit as claimed in claim 1, wherein this Writing power is the luminous power that writes that applies to one optical recording/regenerating unit.
5. power compensating method, in order to compensate a Writing power, this power compensating method comprises:
Receive a servo error signal, and pick up the value that this servo error signal surpasses this limit voltage value part according to a limit voltage value;
Receive the value that this servo error signal surpasses this limit voltage value part,, set yield value according to the value of this servo error signal above this limit voltage value part; And
This yield value is compensated in this Writing power.
6. power compensating method as claimed in claim 5, wherein this servo error signal comprises a focus error signal.
7. power compensating method as claimed in claim 5, wherein this servo error signal comprises a read head error signal.
8. power compensating method as claimed in claim 5, wherein this Writing power is the luminous power that writes that applies to one optical recording/regenerating unit.
9. optical devices are applicable to and use laser beam recording/reproducing information in a record carrier (Record Carrier), and wherein these optical devices comprise a power compensating circuit in order to control the luminous power of this laser beam, and wherein this power compensating circuit comprises:
One servo error signal pick-up circuit has a limit voltage value, and this servo error signal pick-up circuit is in order to receiving a servo error signal, and picks up the value that this servo error signal surpasses this limit voltage value part according to this limit voltage value;
One gain setting device in order to receive the value that this servo error signal surpasses this limit voltage value part, according to the value of this servo error signal above this limit voltage value part, is set yield value; And
One totalizer is in order to compensate to this Writing power with this yield value.
10. optical devices as claimed in claim 9, wherein said totalizer compensates said write power by yield value being added to laser beam.
11. optical devices as claimed in claim 9, wherein this servo error signal comprises a focus error signal.
12. optical devices as claimed in claim 9, wherein this record carrier is a CD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021424071A CN1331135C (en) | 2002-09-17 | 2002-09-17 | Power compensation circuit and method optical device having same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021424071A CN1331135C (en) | 2002-09-17 | 2002-09-17 | Power compensation circuit and method optical device having same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1484229A CN1484229A (en) | 2004-03-24 |
| CN1331135C true CN1331135C (en) | 2007-08-08 |
Family
ID=34148041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021424071A Expired - Fee Related CN1331135C (en) | 2002-09-17 | 2002-09-17 | Power compensation circuit and method optical device having same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1331135C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4389880B2 (en) * | 2006-01-25 | 2009-12-24 | ソニー株式会社 | Optical recording medium recording circuit, optical recording medium recording apparatus, and laser beam intensity adjusting method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039919A (en) * | 1988-07-15 | 1990-02-21 | 德国托姆斯-勃兰特有限公司 | The method and the circuit of compensation offset voltage in focusing and/or tracking circuit |
| US5445716A (en) * | 1994-10-18 | 1995-08-29 | Lloyd Berg | Separation of ethanol from isopropanol by extractive distillation |
| US5675568A (en) * | 1996-01-16 | 1997-10-07 | Eastman Kodak Company | Laser power control in an optical recording system to compensate for variations in mark length resulting from a wobbled groove |
| CN1351330A (en) * | 2000-10-27 | 2002-05-29 | 松下电器产业株式会社 | Method and device for control of semiconductor laser |
| CN1368726A (en) * | 2001-02-07 | 2002-09-11 | 三星电子株式会社 | Automatic power control device of disk driver |
-
2002
- 2002-09-17 CN CNB021424071A patent/CN1331135C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039919A (en) * | 1988-07-15 | 1990-02-21 | 德国托姆斯-勃兰特有限公司 | The method and the circuit of compensation offset voltage in focusing and/or tracking circuit |
| US5445716A (en) * | 1994-10-18 | 1995-08-29 | Lloyd Berg | Separation of ethanol from isopropanol by extractive distillation |
| US5675568A (en) * | 1996-01-16 | 1997-10-07 | Eastman Kodak Company | Laser power control in an optical recording system to compensate for variations in mark length resulting from a wobbled groove |
| CN1351330A (en) * | 2000-10-27 | 2002-05-29 | 松下电器产业株式会社 | Method and device for control of semiconductor laser |
| CN1368726A (en) * | 2001-02-07 | 2002-09-11 | 三星电子株式会社 | Automatic power control device of disk driver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1484229A (en) | 2004-03-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6538962B2 (en) | Method and apparatus for recording optical disk in the event of buffer-underrun in optical disk drive | |
| US5410527A (en) | Information recording/reproducing apparatus including setting optimum recording condition or reproducing condition | |
| CN1722241A (en) | Device and method for recording | |
| CN1265361C (en) | Disc device and method of controlling disc rotating speed | |
| CN1331135C (en) | Power compensation circuit and method optical device having same | |
| JP2000311373A (en) | Disk drive | |
| US6873583B2 (en) | Apparatus and method of power compensation and optical device using the same | |
| JP2000285485A (en) | Optical disk recording and reproducing apparatus | |
| US5128920A (en) | Optical disk apparatus with a laser beam controllable in accordance with a specification area on a disk | |
| CN100349218C (en) | Optical disk recording/reproducing apparatus and method for determining optimal reproducing speed thereof | |
| KR20040025028A (en) | Data recording apparatus, and the method therefor | |
| JPH05166187A (en) | Optical information recording/reproducing device | |
| CN100487798C (en) | Record impulse generation device and information record device | |
| CN102087859A (en) | Recording device and recording method for optical recording medium | |
| US7724624B2 (en) | Method and system for signal gain control in optical disc drives | |
| JPH09326522A (en) | Laser beam output control circuit | |
| JPH03296927A (en) | Laser diode output control device | |
| JP2828906B2 (en) | Optical disk recording and playback device | |
| US5617390A (en) | Optical information recording medium having separate information and reference information portions and method using the same | |
| US20040081042A1 (en) | Optical disc drive | |
| JPH10144002A (en) | Optical disk device and optical disk reproducing method | |
| JP2667445B2 (en) | Optical information recording method | |
| JPH064867A (en) | Method for recording optical information and device for recording and reproducing optical information | |
| EP1178482A1 (en) | Optical disc direct copier | |
| JPH0227549A (en) | Magneto-optical disk device |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070808 Termination date: 20160917 |