CN100421164C - Rotation speed control method for disk reading device - Google Patents
Rotation speed control method for disk reading device Download PDFInfo
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- CN100421164C CN100421164C CNB2004100287686A CN200410028768A CN100421164C CN 100421164 C CN100421164 C CN 100421164C CN B2004100287686 A CNB2004100287686 A CN B2004100287686A CN 200410028768 A CN200410028768 A CN 200410028768A CN 100421164 C CN100421164 C CN 100421164C
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- disk reading
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Abstract
The present invention provides a rotary speed control method applied between a disc reading device and a disc to be read. The disk reading device comprises a rotary motor. The rotary speed control method comprises the procedures: a startup program is executed after the disc to be read is placed in the disc reading device; the disc reading device decides whether a defect mark is lifted or not in the startup program; the disc reading device stops the startup program and enters a reading preparation completion state. When the defect mark is lifted, the rotary speed of the rotary actuator is kept to be a preset speed, and the function that the rotary speed is lowered is closed.
Description
Technical field
The present invention relates to a kind of method for controlling number of revolution, particularly relate to the method for controlling number of revolution that is applied between a disk reading device and a disc to be read.
Background technology
See also Fig. 1, it is that an optical read head 10 is arranged at the direction of motion synoptic diagram in the optical pickup device of CD-ROM drive for example, it mainly moves along two kinds of directions, first kind of direction is perpendicular to focus direction (the focusing direction on discs surface, be called for short F), and second kind of direction is the tracking direction (tracking direction is called for short T) that is parallel to the discs surface.
See also Fig. 2, it is the basic framework function block schematic diagram of a CD-ROM drive, this CD-ROM drive (opticaldisc drive) 100 mainly has an optical read head (optical pickup head is called for short PUH) 10, and discs 110 is subjected to the drive of a rotation motor 120 and rotates.Carry out the mechanism that tracking direction moves and have two and drive this optical read head 10, first is to drive this CD ROM reading-writing head 10 to grow the sled motor 130 (sled motor) that distance moves, and second is to drive this CD ROM reading-writing head 10 to carry out the tracking coil 140 (tracking coil) that trace moves.And 10 pairs of discs 110 of optical read head read and the electronic signal that produces, will by radio frequency amplifier (radio-frequencyamplifier) 150 handle produce radiofrequency signal RF (Radio-Frequency signal) and tracking error signal TE output signals such as (tracking error signal) after, the digital signal processor 170 (digital signal processor) of sending into the rear end is again handled and is used.Motor driver 160 (motor driver) then is subjected to the control of two the control signal FMO and the TRO of digital signal processor 170 output, and then respectively this sled motor 130 is sent suitable driving force with tracking coil 140, make this optical read head 10 move to correct orbital position along tracking direction.And wherein this control signal TRO comes tracking coil 140 is produced driving force in order to control this motor driver 160.
See also Fig. 3 again, it is one to have the discs synoptic diagram of defective (defect), wherein on behalf of a surface, hatched example areas 30 damage the optical disc surface of (for example scratch or be stained with pigment), because the width of hatched example areas 30 is very big (as shown in the figure, there is width to reach the 3mm part), therefore make optical read head 10 when inswept this hatched example areas 30, to will read for some time, and make radiofrequency signal (RFsignal) produce amplitude and narrow down to almost nil signal spacing 40 (see Fig. 4 shown in radiofrequency signal and tracking error signal waveform synoptic diagram) less than data.And the optical read head 10 that utilizes closed loop (closed-loop) mode to carry out tracking Control also can't effectively be finished the tracking action, because in ideal state, tracking error signal (TE) is that a direct current composition is zero ac voltage signal, and when the amplitude of tracking error signal (TE) is zero, represent the optimum condition of tracking, but the tracking error signal TE (tracking error signal) that exports by radio frequency amplifier 150 this moment and can't effectively keep a steady state (SS) and produce big ups and downs (see Fig. 4 shown in radiofrequency signal and tracking error signal waveform synoptic diagram).
In the time of can't effectively carrying out tracking Control when running into above-mentioned situation, conventional art just stops to utilize closed loop (closed-loop) mode to produce control signal TRO, but make control signal TRO before keeping numerical value and do not produce change, or utilize the low-pass filter (not shown) that the radio-frequency component of tracking error signal TE is removed, magnitude of voltage in the hope of control signal TRO can not produce big ups and downs in this section period, and then keeps the position of optical read head 10 and non-reason driving force is excessive and produce and slide or collision.After optical read head 10 passes through this hatched example areas 30, can read data again and make when radiofrequency signal (RF signal) is recovered normal (see Fig. 4 shown in radiofrequency signal and tracking error signal waveform synoptic diagram), just utilize closed loop (closed-loop) mode to produce control signal TRO once again, and then optical read head 10 is controlled on the correct track again.
And in conventional art, when digital signal processor 170 detects the abnormal waveform of this radiofrequency signal (RFsignal) generation again and again, just can think that the discs that is read is not suitable for reading with high rotating speed, and rotating speed down can be adjusted automatically, for example originally ran on 24 times of speed, just progressively be adjusted to 15 times of speed even 10 times of lower speed downwards, in the hope of can be to improve the phenomenon that abnormal waveform takes place radiofrequency signal (RFsignal) than the slow-speed of revolution.But, so the practice is for the disc with defective as shown in Figure 2, and can't effectively improve it and read effect, on the contrary because rotating speed is crossed the overlong time that makes slowly by this hatched example areas 30, the optical read head 10 that can't lock rail is with the substantial deviation track, the error of required correction is bigger when causing system again optical read head 10 to be controlled at correct track again, make that locking rail again need spend more time, and how to improve the defective of this conventional art, be fundamental purpose of the present invention.
Summary of the invention
The invention provides a kind of method for controlling number of revolution, be applied between a disk reading device and the disc to be read, include a rotation motor in this disk reading device, and this method for controlling number of revolution comprises the following step: carry out a start-up routine after should disc to be read inserting this disk reading device; This disk reading device determines in this start-up routine whether an indicia of defects is picked up; And finish this start-up routine in this disk reading device and enter one and read the state of being ready to complete, and this indicia of defects is when also being picked up, the rotating speed of keeping this rotation motor is in a desired speed and close the function of downward adjustment rotating speed.
According to method for controlling number of revolution of the present invention, wherein be the voltage level of in this start-up routine, observing the radiofrequency signal that this disk reading device produced, after the voltage level of this radiofrequency signal is lower than a threshold value and reaches a schedule time, just lift this indicia of defects.
According to method for controlling number of revolution of the present invention, wherein this desired speed be lower than this disk reading device maximum speed but more than or equal to the intermediate value of this disk reading device range of speeds.
According to method for controlling number of revolution of the present invention, its applied this disk reading device is a DVD drive and a DVD discs with this disc to be read.
According to method for controlling number of revolution of the present invention, its applied this disk reading device is a CD drive and a CD discs with this disc to be read.
According to method for controlling number of revolution of the present invention, wherein be the voltage level of in this start-up routine, observing the tracking error signal TE that this disk reading device produced, reach a schedule time when excessive shake takes place for the voltage level of this tracking error signal TE.
Description of drawings
Below in conjunction with accompanying drawing the present invention is elaborated, in the accompanying drawing:
Fig. 1 is that an optical read head is arranged at the direction of motion synoptic diagram in the optical pickup device of CD-ROM drive for example;
Fig. 2 is the basic framework function block schematic diagram of a CD-ROM drive;
Fig. 3 one has the discs synoptic diagram of defective (defect);
This radiofrequency signal and tracking error signal waveform synoptic diagram when Fig. 4 is the inswept discs with defective (defect) of an optical read head;
Fig. 5 is the waveform synoptic diagram of the present invention indicia of defects, radiofrequency signal and the tracking error signal that use; With
Fig. 6 is the control method process flow diagram of preferred embodiment of the present invention.
The reference numeral explanation
Optical read head 10 CD-ROM drives 100
Discs 110 rotation motors 120
Sled motor 130 tracking coils 140
Embodiment
When disc to be read insert a disk reading device at the beginning the time, this disk reading device is to be in a start-up routine (start-up), and this start-up routine (start-up) is the fixing kind class method of carrying out (i) differentiation disc with minimum speed setting (this example is 10 times of speed), be called for short the voltage level declare sheet, (ii) to carry out radiofrequency signal and proofread and correct and (iii) read contents table (Table of Contents on the disc, abbreviation TOC) behind the supervisor, enters reading of next stage again and be ready to complete (ready) state.
And be typically provided with an indicia of defects (flag for defect) in the digital signal processor 170, at the voltage level timing that carries out radiofrequency signal RF (Radio-Frequency signal), digital signal processor 170 is after the voltage level of radiofrequency signal RF is lower than a threshold value and reaches a schedule time, just lift this indicia of defects, its coherent signal waveform synoptic diagram see also Fig. 5 shown in.
So, when disk reading device enters reading of next stage when being ready to complete (ready) state, this indicia of defects is when being in upborne state, just can judging this disc to be read of being inserted and be the discs with defective (defect) as shown in Figure 3.So technical characterictic of the present invention is to finish this start-up routine at this disk reading device to enter this and read the state of being ready to complete, and when this indicia of defects also is picked up, assert that this disc to be read is the discs with defective (defect) as shown in Figure 3, and then enter one and keep the rotating speed state, and this to keep the rotating speed state be the function that the rotating speed of this rotation motor 120 is maintained at a desired speed and closes downward adjustment rotating speed, its control method process flow diagram see also Fig. 6 shown in.
In detail, in method of the present invention, when disk reading device enter one keep the rotating speed state after, when even abnormal waveform takes place in this radiofrequency signal (RF signal) that this digital signal processor 170 detects in reading the state of being ready to complete again and again, still the rotating speed of this rotation motor 120 can be maintained at this desired speed and reduction of speed not, this desired speed be lower than this disk reading device maximum speed but more than or equal to the intermediate value of this disk reading device range of speeds.For example maximum speed is 24 times of speed, and this desired speed will be made as 20 times of speed.Thus, after using technical scheme proposed by the invention, stable and the enough fast rotating speed time by this hatched example areas 30 that will make significantly shortens, make that the optical read head 10 that can't lock rail is too many with unlikely offset track, only need revise a little error when making system again optical read head 10 is controlled at correct track again, make and to lock the rail effectively shortening of taking time again, and then improve the defective of aforesaid conventional art, realize fundamental purpose of the present invention.
And this above-mentioned disk reading device can be respectively a DVD drive and a DVD discs with this disc to be read, or is respectively a CD drive and a CD discs.In addition, whether upborne judgment standard still can utilize alternate manner to carry out to this indicia of defects (flag fordefect), for example, observe the voltage level of the tracking error signal TE that this disk reading device produces, after the excessive shake of voltage level generation of tracking error signal TE reaches a schedule time, just lift this indicia of defects, its coherent signal waveform synoptic diagram also sees also shown in Figure 5.Those skilled in the art can carry out some modifications and variation under the prerequisite that does not exceed scope of the present invention, so protection scope of the present invention is defined by claim of the present invention.
Claims (5)
1. method for controlling number of revolution is applied to include a rotation motor in this disk reading device, and this method for controlling number of revolution comprise the following step between a disk reading device and the disc to be read:
Carry out a start-up routine after should disc to be read inserting this disk reading device;
This disk reading device determines in this start-up routine whether an indicia of defects is picked up; And
Finish this start-up routine in this disk reading device and enter one and read the state of being ready to complete, and this indicia of defects is when also being picked up, the rotating speed of keeping this rotation motor is in a desired speed and close the function of downward adjustment rotating speed,
Wherein, this desired speed be lower than this disk reading device maximum speed but more than or equal to the intermediate value of this disk reading device range of speeds.
2. method for controlling number of revolution as claimed in claim 1, wherein in this start-up routine, observe the voltage level of the radiofrequency signal that this disk reading device produced, after the voltage level of this radiofrequency signal is lower than a threshold value and reaches a schedule time, just lift this indicia of defects.
3. method for controlling number of revolution as claimed in claim 1, its applied this disk reading device is a DVD drive and a DVD discs with this disc to be read.
4. method for controlling number of revolution as claimed in claim 1, its applied this disk reading device is a CD drive and a CD discs with this disc to be read.
5. method for controlling number of revolution as claimed in claim 1, wherein in this start-up routine, observe the voltage level of the tracking error signal TE that this disk reading device produced, reach a schedule time when excessive shake takes place for the voltage level of this tracking error signal TE, just lift this indicia of defects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100287686A CN100421164C (en) | 2004-03-17 | 2004-03-17 | Rotation speed control method for disk reading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100287686A CN100421164C (en) | 2004-03-17 | 2004-03-17 | Rotation speed control method for disk reading device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1670851A CN1670851A (en) | 2005-09-21 |
| CN100421164C true CN100421164C (en) | 2008-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100287686A Expired - Fee Related CN100421164C (en) | 2004-03-17 | 2004-03-17 | Rotation speed control method for disk reading device |
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| Country | Link |
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| CN (1) | CN100421164C (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1368635A (en) * | 2001-02-05 | 2002-09-11 | 三星电子株式会社 | Detecting method for disk rent and method for control speed of disk driver |
| JP2003331536A (en) * | 2002-05-08 | 2003-11-21 | Sony Corp | Disk player and disk playing-back method |
| CN1459787A (en) * | 2002-05-21 | 2003-12-03 | 三星电子株式会社 | Apparatus and method for updating filter tap coefficient of balancer |
-
2004
- 2004-03-17 CN CNB2004100287686A patent/CN100421164C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1368635A (en) * | 2001-02-05 | 2002-09-11 | 三星电子株式会社 | Detecting method for disk rent and method for control speed of disk driver |
| JP2003331536A (en) * | 2002-05-08 | 2003-11-21 | Sony Corp | Disk player and disk playing-back method |
| CN1459787A (en) * | 2002-05-21 | 2003-12-03 | 三星电子株式会社 | Apparatus and method for updating filter tap coefficient of balancer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1670851A (en) | 2005-09-21 |
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Granted publication date: 20080924 Termination date: 20100317 |