CN1210709C - Apparatus for checking disc inserting fault and method thereof - Google Patents
Apparatus for checking disc inserting fault and method thereof Download PDFInfo
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- CN1210709C CN1210709C CN 03122907 CN03122907A CN1210709C CN 1210709 C CN1210709 C CN 1210709C CN 03122907 CN03122907 CN 03122907 CN 03122907 A CN03122907 A CN 03122907A CN 1210709 C CN1210709 C CN 1210709C
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims description 24
- 238000003780 insertion Methods 0.000 claims description 19
- 230000037431 insertion Effects 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 15
- 239000004744 fabric Substances 0.000 claims description 14
- 230000000052 comparative effect Effects 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 230000004069 differentiation Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 1
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Abstract
The invention relates to an apparatus for checking disc inserting fault and method thereof, which can decide whether the disc like high density DVD (HD-DVE) insert falsely into the disc drive apparatus in a overturning state. The invention compares an impulse wave form of the Frequency Generate Signal output from electric rotating machine to a normal in order to decide whether the disc insert correctly. When deciding the disc inserting fault, it stops the focus servo operation for running the disc and furthermore radically prevents the damage due to the collision between the lens of the pick-up device and disc and the focus servo fault.
Description
(1) technical field
The present invention relates to a kind of devices and methods therefor that the CD mistake is inserted that detects, be used to differentiate the same CD of image height density D VD (HD-DVD:High Density Digital Versatile Disc) and in optical disc apparatus, whether insert with the rollover states mistake.
(2) background technology
Existing C D CD (hereinafter to be referred as CD or CD CD), its thickness is that 1.2mm, diameter are 120mm, and be provided with the center pit of 15mm diameter, and the clamper zone that clamper has the 44mm diameter that is used for of leaning on interior rotating disk of optical disc apparatus and clamp device composition.The data record layer that is recorded in above-mentioned CD with record pit pattern (pit pattern) is, be arranged on above-mentioned optical disc apparatus in the relative direction of object lens (OL:0bject Lens) of light picker, at interval on the position of about 1.2mm, above-mentioned CD is with pick-up NA (Numerical Aperture: numerical aperture) less (the NA value is 0.45).
In addition, the disk thickness of existing DVD is that 1.2mm, cd diameter are 120mm, also is provided with the center pit that diameter is 15mm, and the clamper zone that clamper has the 44mm diameter that is used for of leaning on interior rotating disk of optical disc apparatus and clamp device composition.With the data record layer of record pit mode record on DVD be, be arranged on above-mentioned optical disc apparatus in the relative direction of object lens (OL) of light picker, at interval on the position of about 0.6mm, above-mentioned DVD is with the numerical aperture of pick-up (NA=0.6) greatly.
As shown in Figure 1, existing HD-DVD disk thickness is 1.2mm, and diameter is 12mm, also is provided with the center pit of 15mm diameter, and the clamper zone that clamper has the 44mm diameter that is used for of leaning on interior rotating disk of optical disc apparatus and clamp device composition.But, the data record layer that on above-mentioned existing HD-DVD, writes down with the record pit pattern, be arranged on above-mentioned optical disc apparatus in the relative direction of object lens (OL) of light picker, at interval on about 0.1mm position.Above-mentioned HD-DVD, can only use than above-mentioned CD and the shorter short wavelength laser beam of DVD wavelength in order to read or write down the data with the record pit shape of high density recording with pick-up numerical aperture maximum (NA=0.85) comparatively speaking.
Therefore, make the object lens (OL) of the light picker that HD-DVD uses more approach the data record layer of HD-DVD, in the emission short wavelength laser beam, also increased the numeric aperture values of object lens, thereby the laser beam of more light quantities is formed on the record pit with high density recording with little beam spot (Beam Spot).In addition, short wavelength's laser beam is shortened to bee-line, reduce the possibility that the character of laser beam repeatedly changes as far as possible by transparent photic zone.
As shown in Figure 2, when normally being inserted HD-DVD10 on the rotating disk 11 in being arranged on optical disc apparatus, after clamp device 16 clampers, common servo operation is: for example rely on electric rotating machine 12 and drive motor 13, and drive HD-DVD10 according to the servo operation of servo controller 15 and carry out high speed rotating, and, just normally read or write down high density data after the focusing operation in specific opereating specification (OD:Operating Distance) with record pit shape record by the focusing operation that the object lens (OL) of pick-up (P/U) 14 move up and down.
But, as shown in Figure 3, when the HD-DVD10 on the rotating disk 11 in being arranged on optical disc apparatus is wrong the insertion, be that HD-DVD10 is reversed when inserting, as previously mentioned, after clamp device 16 clampers, lean on the servo operation drive HD-DVD10 of electric rotating machine 12 and drive motor 13 and servo controller 15 to carry out high speed rotating.At this moment, the 1.1mm far away at least during than normal insertion by the distance of the object lens (OL) of the recording layer of the wrong HD-DVD that inserts and pick-up 14.
Then, the object lens of above-mentioned pick-up 14 (OL) can't be carried out normal data read or record by the focusing operation that moves up and down.Therefore, in servo controller 15 inside of the above-mentioned focusing operation of control, the object lens (OL) of above-mentioned pick-up 14 can be moved vertically to maximum operating distance (OD towards the recording layer direction of HD-DVD10
Max), producing collision as a result between object lens of pick-up (OL) and the HD-DVD10 each other, fatal problems such as mistake perhaps take place to servo operation in the object lens breakage of high density compact disc or pick-up.
Thus, done following improvement, as shown in Figure 4, the lower surface in the clamper zone of HD-DVD20 is provided with the ring groove H of certain depth D2, at a side surface of clamp device 160, then is provided with the annular projection P (D1＜D2) of certain thickness D1.Above-mentioned HD-DVD20, when in optical disc apparatus, inserting with the rollover states mistake, as shown in Figure 5, and can only be with imperfect state clamper, thus normal state that inserts of above-mentioned HD-DVD and the wrong state that inserts can be distinguished.
In addition, done improvement as shown in Figure 6 again,, set certain thickness D in the clamper region upper surface of HD-DVD21
2Annular projection P
2, certain thickness D is set in the side in clamper portion 161
1Annular projection P
1(D
1＞D
2), when above-mentioned HD-DVD21 inserts with the rollover states mistake in optical disc apparatus, as shown in Figure 7, because of clamper fully, so can distinguish normal state that inserts of above-mentioned HD-DVD and the wrong state that inserts.
In addition, except that above-mentioned improvement project, set ring groove, on the rotating disk 11 that above-mentioned HD-DVD is installed, set annular projection in the clamper zone of above-mentioned HD-DVD; Perhaps, on the rotating disk 11 that above-mentioned HD-DVD is installed, set ring groove, annular projection is set in clamper zone at above-mentioned HD-DVD, as previously mentioned, when CD inserts in the optical disc apparatus with the rollover states mistake, cause is clamper fully, so the state difference of normal state that inserts of above-mentioned HD-DVD and wrong insertion can be come.This type of scheme is diversified.
But in fact, about the state of clamper fully as mentioned above, that is, CD is put into effect as yet with the concrete effectively decision scheme of the state that rollover states is inserted by mistake.
(3) summary of the invention
The present invention proposes for addressing the above problem just, and its purpose is to provide a kind of and whether a kind ofly detects the devices and methods therefor that the CD mistake is inserted with what the rollover states mistake was inserted by detecting and utilize CD that FG signal (the Frequency Generate signal) pulse waveform of electric rotating machine output judges simply exactly similar image height density D VD (HD-DVD).
The object of the present invention is achieved like this:
A kind of method that detects the insertion of CD mistake is characterized in may further comprise the steps:
A kind of device that detects the insertion of CD mistake is characterized in that described device comprises:
Be used to insert the placing device of laying CD;
The above-mentioned CD of having laid is carried out the clamp device of clamper;
With the above-mentioned CD rotation of clamper and the whirligig that stops;
Drive the drive motor of described whirligig;
The light picker of the described CD signal of reading and recording;
Calculation element is input to stop signal on the described whirligig, and the FG pulse signal of above-mentioned CD output when the rotation of described whirligig of taking a sample from that time of importing above-mentioned stop signal calculates the standard deviation value of the FG signal pulse width of cloth; And
Control device, according to the standard deviation value of calculating, standard deviation value of calculating and predefined reference value are compared, according to comparative result, differentiate the insertion state of the right and wrong of described CD, and according to differentiating the result, optionally carry out the focus servo operation of described CD and focus on shut-down operation, the standard deviation value of calculating when described calculation element is during greater than described predefined reference value, judge that described CD is to insert with the rollover states mistake, and stop focus servo operation described CD.
Effect of the present invention:
The devices and methods therefor that detection CD mistake of the present invention is inserted, whether the CD that is used to differentiate similar image height density D VD (HD-DVD) is inserted in the optical disc apparatus with the rollover states mistake, by detecting and utilizing from the pulse waveform of the FG signal (Frequency Generate Signal) of electric rotating machine output, come simply to differentiate exactly the mistake of CD and insert state, stop focusing operation then in view of the above, thus essence prevent to collide each other between the object lens OL of light picker and the CD and cause the generation of breakage and mortality servo operation mistake.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
(4) description of drawings
Fig. 1 is the CD structure of existing high density DVD (HD-DVD);
Fig. 2 and Fig. 3 are depicted as normal insertion state and the wrong insertion state of existing HD-DVD in optical disc apparatus separately;
Fig. 4 and Fig. 5 are relevant HD-DVD and the sectional view of clamp device and the state of HD-DVD wrong insertion in optical disc apparatus thereof that is made improvements by motion;
Fig. 6 and Fig. 7 are relevant HD-DVD and the sectional view of clamp device and the state of HD-DVD wrong insertion in optical disc apparatus thereof that another is made improvements by motion.
Fig. 8 inserts state according to device and HD-DVD mistake that detection CD mistake of the present invention is inserted;
Fig. 9 is the operational flowchart according to the method for detection CD mistake insertion of the present invention;
Figure 10 (a) and (b) are the timing chart according to the detected FG signal of the device of detection CD mistake insertion of the present invention;
Figure 11 is the chart of calculating the standard deviation of the relevant FG deration of signal according to the method that detection CD mistake of the present invention is inserted.
(5) embodiment
At first, Figure 8 shows that the structural representation of the device that related detection CD mistake of the present invention is inserted, the device that above-mentioned decision error inserts comprises: be used to insert the rotating disk (placing device) 11 of laying picture HD-DVD class CD 20; The clamp device 160 of CD 20 clampers of above-mentioned rotating disk 11 will be placed in; Be used to rotate the electric rotating machine (whirligig) 12 of the CD of above-mentioned clamp device clamper; Be used to rotate, drive the drive motor 13 of above-mentioned electric rotating machine; Be used to read or write down the light picker (P/U) 14 of above-mentioned CD 20 data-signals; For driving, control the servo controller (control device) 35 of above-mentioned light picker 14 and drive motor; Be used to calculate the deviation calculator (calculation element) 30 of standard deviation (FGSD:FG Standard deviation) of the pulse width of cloth of the relevant FG signal that above-mentioned electric rotating machine exports when rotated.
Above-mentioned CD 20 and clamp device 160 to shown in Figure 7, are respectively equipped with ring groove or annular projection etc. with reference to figure 4, and perhaps above-mentioned CD 20 and rotating disk 11 are respectively equipped with ring groove or annular projection etc.In an embodiment of the present invention, as shown in Figure 8, ring groove and annular projection are set respectively at above-mentioned CD 20 and clamp device 160, when above-mentioned CD 20 inserts with the rollover states mistake, may be clamper fully, illustrate as follows.
Figure 9 shows that the operational flowchart of the method for inserting according to detection CD mistake of the present invention, and be described below with reference to structure as shown in Figure 8:
S11: above-mentioned similar CD 20 insertions as HD-DVD that have ring groove in the clamper zone are placed on the rotating disk 11.
S12: be placed in CD 20 on the above-mentioned rotating disk through above-mentioned clamp device 160 clampers that are provided with annular projection.
S13: by servo controller 35 control operation drive motor 13, (Spindle KickVoltage) is input to electric rotating machine 12 with driving voltage, makes electric rotating machine 12 high speed rotating.
In view of the above, can high speed rotating through the CD 20 of clamp device 160 clampers, but this moment, described servo controller 35 is normal insertion in optical disc apparatus in order to differentiate above-mentioned CD 20, still insert with the rollover states mistake, the electric rotating machine 12 of high speed rotating is stopped operating after setting-up time.
S14: by described servo controller 35 operation control electric rotating machines 12, stop signal is input on the electric rotating machine 12 of high speed rotating, electric rotating machine 12 stops operating.If above-mentioned CD 20 is being inserted in the optical disc apparatus with the rollover states mistake, and with partial state during by clamper, the noise that high speed rotating produces just strengthens, the rotational time of above-mentioned electric rotating machine 12 is condensed to the shortest as far as possible, such as rotates about 0.5 second to 2 seconds just should import stop signal after the interior time.
S15:, calculate the standard deviation of the pulse width of cloth of the relevant FG signal of above-mentioned electric rotating machine 12 outputs by the above-mentioned deviation calculator 30 of above-mentioned servo controller 35 operation controls.Then, above-mentioned deviation calculator 30 above-mentioned electric rotating machine 12 in setting-up time (as: 0.5 second), be rotated stop then after, export the FG signal and carry out " sampling " that time that will stop (Brake) signal from input, calculates the standard deviation of the FG signal pulse width of cloth of sampling.
At this moment, shown in Figure 10 (a) and (b), above-mentioned electric rotating machine 12 is exported the FG signal from that time of input stop signal, whether insert [Figure 10 (b)] according to the normal insertion [Figure 10 (a)] or the mistake of CD 20, can export different each other waveform.
That is to say, if above-mentioned CD 20 normally is inserted in the optical disc apparatus, and with complete state during by clamper, after stop signal is input to above-mentioned electric rotating machine, the pulse width of cloth of the FG signal that is output, (unit of each data is its data among the figure: ms), almost evenly increase progressively as shown in figure 11; If above-mentioned CD 20 is when being inserted in the optical disc apparatus with the rollover states mistake, can be with partial state by clamper, like this, and the pulse width of cloth of above-mentioned FG signal, its data are seen on the whole, just seem bigger and inhomogeneous.
S16: the pulse width of cloth standard deviation (FGsd) of the FG signal of calculating by above-mentioned deviation calculator 30 as shown in figure 11, can preestablish reference value (FGref), such as set reference value is " FGref=7 ", at CD normally under the insertion state, its standard deviation value is littler than " FGref=7 ", and under CD mistake insertion state, its standard deviation value is bigger than said reference value " FGref=7 ".
S17: the standard deviation of the relevant pulse width of cloth of the standard deviation value FGsd signal of above-mentioned deviation calculator 30 being calculated by above-mentioned servo controller 35 compares with the reference value FGref that sets in advance, when above-mentioned comparative result is that the standard deviation of calculating is during less than the said reference value, the above-mentioned CD of decidable be normally be inserted in the optical disc apparatus and with complete state by clamper, like this, can make focus servo operation that the object lens OL of above-mentioned light picker 14 moves up and down and the servo operation normally operation together that drives above-mentioned electric rotating machine 12 again.
S18: the focusing operation of the object lens OL by above-mentioned light picker 14, can read/write down the data that write down on the above-mentioned CD normally.
S19: in contrast, when comparative result among the S16 is the standard deviation FGsd that calculates during greater than said reference value FGref, the above-mentioned CD of decidable is to be inserted in the optical disc apparatus with the rollover states mistake, and with partial state by clamper.
S20: stop the focus servo operation that the object lens OL of light picker 14 moves up and down this moment, and the information inserted of output error, thereby prevent CD 20 and object lens collision each other.
Reference is because of the arithmetic expression of relevant above-mentioned standard deviation is well-known general arithmetic expression, so in this omission.
The above embodiments of the invention is created for the purpose of indication, above-mentioned CD is high density DVD, certainly also be applicable to the polytype CD, certainly, those of ordinary skill in the art will be appreciated that above embodiment is used for illustrating the present invention, and is not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.
Claims (9)
1. one kind is detected the method that the CD mistake is inserted, and it is characterized in that said method comprising the steps of:
Step 1, the CD that insertion is placed in the optical disc apparatus carries out clamper;
Step 2, after the CD rotation certain hour with described clamper, the input stop signal; And
Step 3, after the input stop signal, calculate the standard deviation of the pulse width of cloth of the FG signal that described CD exports when whirligig rotates, standard deviation value of calculating and predefined reference value are compared, when described standard deviation value during, judge that then described CD is to insert with the rollover states mistake greater than described reference value.
2. the method that detection CD mistake as claimed in claim 1 is inserted is characterized in that also comprising step 4, according to differentiating the focus servo operation that the result optionally stops described CD.
3. the method that detection CD mistake as claimed in claim 1 is inserted is characterized in that in the described step 2, and when CD inserted with the rollover states mistake, the noise that is sent when considering rotation will be imported stop signal in 0.5 second～2 seconds.
4. the method that detection CD mistake as claimed in claim 1 is inserted, it is characterized in that in the described step 3, the standard deviation of the pulse width of cloth of the FG signal that described CD is exported when rotated, be when described CD rotates, after the FG pulse signal of whirligig output is taken a sample, calculate standard deviation value to the pulse width of cloth of the FG signal of its sampling.
5. the method for inserting as claim 1,2 described detection CD mistakes, it is characterized in that in the described step 4, according to differentiating the result whether described CD mistake is inserted, be meant when the result inserts with the rollover states mistake for differentiating described CD, then the focus servo operation of described CD out of service.
6. the method that detection CD mistake as claimed in claim 1 is inserted, it is characterized in that in the described step 3, the waveform of the pulse signal of exporting when rotated according to described CD, whether differentiate described CD mistake inserts, when the described CD of rotation, after the FG pulse signal of whirligig output is taken a sample, calculate the standard deviation value of the sampling FG signal pulse width of cloth, standard deviation value of calculating and predefined reference value are compared, when described standard deviation value during, judge that described CD inserts for correct less than described reference value.
7. the method for inserting as claim 1,6 described detection CD mistakes, it is characterized in that in the described step 4, according to differentiating the result whether described CD mistake is inserted, when the result correctly inserts for the described CD of judgement, carry out the focus servo operation of described CD.
8. applied device of method that detection CD mistake as claimed in claim 1 is inserted is characterized in that described device comprises:
Be used to insert the placing device of laying CD;
The described CD of having laid is carried out the clamp device of clamper;
The whirligig that the described CD of clamper is rotated and stops;
Drive the drive motor of described whirligig;
The light picker of the described CD signal of reading and recording;
Calculation element is input to stop signal on the described whirligig, from importing that time of described stop signal, and the FG pulse signal of the described CD output when described whirligig rotates of taking a sample, and the standard deviation value of the calculating FG signal pulse width of cloth; And
Control device, according to the standard deviation value of being calculated, standard deviation value of calculating and predefined reference value are compared, differentiate the insertion state of the right and wrong of described CD according to comparative result, and according to its differentiation result, optionally carry out the focus servo operation of described CD or stop focus servo operation, the standard deviation value of calculating when described calculation element is during greater than described predefined reference value, judge that described CD is to insert with the rollover states mistake, and stop focus servo operation described CD.
9. the device that detection CD mistake as claimed in claim 8 is inserted, it is characterized in that described control device is, the standard deviation value of calculating at described calculation element is during smaller or equal to described predefined reference value, judge that described CD inserts for correct, and carry out the focus servo operation of described CD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03122907 CN1210709C (en) | 2002-10-18 | 2003-04-18 | Apparatus for checking disc inserting fault and method thereof |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02137513.5 | 2002-10-18 | ||
| CN02137513 | 2002-10-18 | ||
| CN 03122907 CN1210709C (en) | 2002-10-18 | 2003-04-18 | Apparatus for checking disc inserting fault and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1490809A CN1490809A (en) | 2004-04-21 |
| CN1210709C true CN1210709C (en) | 2005-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03122907 Expired - Fee Related CN1210709C (en) | 2002-10-18 | 2003-04-18 | Apparatus for checking disc inserting fault and method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN1210709C (en) |
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- 2003-04-18 CN CN 03122907 patent/CN1210709C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1490809A (en) | 2004-04-21 |
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