CN101661764B - Distinguishing method and distinguishing device of optical discs - Google Patents
Distinguishing method and distinguishing device of optical discs Download PDFInfo
- Publication number
- CN101661764B CN101661764B CN2009101731766A CN200910173176A CN101661764B CN 101661764 B CN101661764 B CN 101661764B CN 2009101731766 A CN2009101731766 A CN 2009101731766A CN 200910173176 A CN200910173176 A CN 200910173176A CN 101661764 B CN101661764 B CN 101661764B
- Authority
- CN
- China
- Prior art keywords
- discs
- signal
- pulse wave
- laser
- lens
- 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
Images
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Abstract
The invention discloses a distinguishing method and a distinguishing device of optical discs. The distinguishing device of optical discs comprises an optical read/write head, a digital signal processor and a radio frequency amplifier, wherein the optical read/write head has a plurality of lasers and a lens, when the optical read/write head is driven by a startup program, lasers except blue laser are lightened and shined to one optical disc to generate an electrical signal, the digital signal processor is used to output a driving signal to ensure that an electrical motor driver controls the lens to move along a focusing direction, when the lens is in movement, the radio frequency amplifier is used to receive the electrical signal and generate a first signal; in addition, the digital signal processor comprises a detection unit, the detection unit can generate a pulse wave number according to the first signal and a cutting signal and according to the pulse wave number, that whether the optical disc is a blue light disc or not can be judged. The distinguishing method of the invention can not only prolong the service life of the blue laser, but also effectively prevent the friction between the lens and the surface of the optical disc.
Description
Technical field
The present invention relates to a kind of detection method and device of discs, and be particularly related to the detection method and the device of a kind of blue light disk (blue-ray disc) and non-blue light disk.
Background technology
Please refer to first figure, it is the function block diagram of a CD drive.Wherein The CD drive (optical disc drive) 100 mainly has an optical read/write head (optical pickup head, be called for short PUH) 10, and have a center hole (center hole) can be fixed on the rotating disc (turn table) 122 on the discs 110 and be subjected to the drive of a spindle drive motor (spindle motor) 120 and rotate.Carry out the mechanism that discs moves radially and have two and drive this optical read/write head 10, first is to drive coaster 14 to grow the coaster motor 130 (sled motor) that distance moves, second be drive that lens 12 carry out that trace moves follow path circle 140 (tracking coil).In addition, drive these lens 12 and then be the focusing coil 145 shown in the figure toward the mechanism that focus direction moves.In general, comprise a plurality of laser in the optical read/write head 10, the blue laser of the DVD laser of the CD laser of wavelength 780nm, wavelength 650nm, wavelength 405nm for example, each laser can be used to read corresponding discs.
Moreover, the ultra-weak electronic signal that produces during the enterprising line access of 10 pairs of discs of optical read/write head 110, produce once light after will handling by radio frequency amplifier (radio-frequency amplifier) 150 and add resultant signal SBAD (sub-beam added signal), one radiofrequency signal RF (Radio-Frequency signal), after tracking error signal TE (tracking error signal) and the focus error signal FE output signals such as (Focusing error signal), the digital signal processor 170 (digital signal processor) of sending into the rear end is again handled and is used.First motor driver 160 (motor driver) then is subjected to digital signal processor 170 to export three drive signals according to the variation of tracking error signal TE and focus error signal FE, and then divide acute to this coaster motor 130, follow path circle 140 and send suitable driving force with focusing coil 145, make this optical read/write head 10 can maintain suitable focal position and along the moving radially of discs, and the control of first motor driver follow path circle 140 and comes the signal of mobile lens 12 to be referred to as to follow rail output signal TRO (tracking output signal) to correct orbital position.Export a drive signal as for 165 of second motor drivers also are subjected to the control of digital signal processor 170, this spindle drive motor 120 is sent suitable driving force, make this disc with a suitable rotating speed rotation.
After discs was written into CD drive, CD drive can be carried out a start-up routine (start-up procedure), and the discs that is written into difference is the discs that belongs to which kind of type.The type of discs can be CD discs, DVD discs or blue light disk.After CD drive is learnt the type of discs, but promptly can obtain corresponding controlled variable and access discs.
In general, known CD drive can utilize the top layer (surface layer) of discs and the distance between the data Layer (data layer) to decide discs.Please refer to Fig. 2 A and Fig. 2 B, the signal schematic representation that it is shown when detecting DVD discs and CD discs for optical read/write head.Shown in Fig. 2 A, the top layer of DVD discs 200 and the distance between the data Layer are 0.6mm.Therefore, when CD drive control focusing coil made that lens 202 move toward DVD discs direction, Focus Club was in regular turn through top layer and data Layer.When focus during through the top layer, radiofrequency signal RF can produce the less peak value of amplitude; When focus process data Layer, radiofrequency signal RF can produce the bigger peak value of amplitude.Moreover when focus during through the top layer, focus error signal FE can produce the peak S curve (S curve) less to peak value (peak-to-peak value); When focus process data Layer, focus error signal FE can produce the peak S curve bigger to peak value.Moreover inferior light adds two peak values that resultant signal SBAD also can produce similar radiofrequency signal RF, therefore repeats no more.
Shown in Fig. 2 B, the top layer of CD discs and the distance between the data Layer are 1.2mm, and when CD drive control focusing coil made that lens 202 move toward CD discs direction, Focus Club was in regular turn through top layer and data Layer.In like manner, radiofrequency signal also can two peak values of corresponding generation, and focus error signal also can produce two S curves.
By Fig. 2 A and Fig. 2 B as can be known, under the speed that lens 202 move is fixing, the distance when being written into the CD discs between the radiofrequency signal peak value can be when being written into the DVD discs distance between the radiofrequency signal peak value.Distance when in like manner, being written into the CD discs between the focus error signal S curve can be when being written into the DVD discs distance between the focus error signal S curve.Use above-mentioned characteristic can distinguish CD discs and DVD discs.
Yet, because the speed potentially unstable that lens move causes CD discs and the misjudgment of DVD discs.United States Patent (USP) number US7149169 and United States Patent (USP) number US7161886 are with based on above-mentioned characteristic, increase separately and confirm step, in order to strengthen the judgement success ratio of CD discs and DVD discs.
Wherein, United States Patent (USP) number US7149169 control lens are opened different laser when different directions moves, and judge that according to the characteristic that inferior light adds resultant signal SBAD discs is CD discs or DVD discs.
Wherein, United States Patent (USP) number US7161886 control lens are opened different laser when different directions moves, and judge that according to the relation between radio frequency rf signal and the focusing error FE signal discs is CD discs or DVD discs.The above technology that discloses all is to be used for differentiating CD discs and DVD discs, and CD discs and DVD discs can be classified as non-blue light disk.
After the blue light disk of new generation came out, CD drive just must can be told CD discs, DVD discs and blue light disk when start-up routine.Please refer to Fig. 3 A and Fig. 3 B, it is shown to be the synoptic diagram of known differentiation blue light disk and non-blue light disk.This method is disclosed in the early stage publication number US2006/0104176 of United States Patent (USP).This method is to utilize the data Layer of discs (data layer) and the operating distance (working distance) of surface distance of (surface) and lens to judge the kind of discs.By Fig. 3 A as can be known, the thickness of blue light disk 310 is 1.2mm, and the distance on data Layer 313 and top layer 311 is 0.1mm; The thickness of DVD discs 330 is 1.2mm, and the distance on data Layer 333 and top layer 331 is 0.6mm; The thickness of CD discs 350 is 1.2mm, and the distance on data Layer 353 and top layer 351 is 1.2mm.
Because in the optical read head, blue light source has high-NA (NA, numerical aperture) characteristic of low wavelength, therefore the optical phenomena that has short focal distance f produces, make the operating distance (working distance) of blue laser light source less than DVD and CD superficial layer to the distance between data Layer, less than 0.6mm, and the lens that so-called operating distance is the blue light optical read/write head distance that moves of disc direction in the past.Therefore, shown in Fig. 3 B, utilize the blue laser light-resource fousing to move in blue light disk 310 and between operating distance.Because focus can be through the top layer 311 and the data Layer 313 of blue light disk 310, so can produce two reflected signals (reflection signal), first reflected signal 381 is that top layer 311 reflection by blue light disk 310 is produced, second reflected signal 382 be the data Layer 313 by blue light disk reflect produced.
Moreover, when the blue laser light-resource fousing moves in DVD discs 330 and between operating distance, only can produce a reflected signal (reflection signal) 383.Because the data Layer 333 of DVD discs is 0.6mm with the distance on top layer 331, so reflected signal 383 is that top layer 331 reflections by DVD discs 330 are produced.Also promptly, the focus of blue laser light source can't arrive the data Layer 333 of DVD discs 330 and can't produce other reflected signal.In like manner, the CD discs also only can produce a reflected signal.
Therefore, can to decide discs according to the number of reflected signal be to belong to non-blue light disk (CD discs, DVD discs) or blue light disk in this invention.Also promptly, when producing two reflected signals, discs is blue light disk; When only producing a reflected signal, discs is non-blue light disk (CD discs, DVD discs).
Yet because the costing an arm and a leg of blue laser, and known CD drive all must be opened blue laser and distinguished non-blue light disk and blue light disk when each discs is written into CD drive, so will cause the lost of life of blue laser.Moreover, because the operating distance of blue laser light source is very short, therefore might be when non-blue light disk of difference and blue light disk, because the mobile of lens causes the friction on lens and discs surface to make discs and lens by scratch.
Summary of the invention
The objective of the invention is to propose a kind of difference apparatus and method of discs.It can utilize the cheaper non-blue laser of price to judge that the discs that is written into is non-blue light disk and blue light disk, and can prolong the life-span of blue laser and prevent lens and the friction on discs surface.
Therefore, the present invention proposes a kind of difference device of discs, comprising: an optical read/write head has a plurality of laser and lens, wherein this optical read/write head is when a start-up routine, lights a non-blue laser in described a plurality of laser and shines on a discs and produce an electric signal; One digital signal processor produces a cutting signal of fixed value and exports a drive signal so that a motor driver is controlled these lens moves in a focus direction; And a radio frequency amplifier receives this electric signal, processing and produces one first signal in this lens moving process, and this first signal adds a resultant signal or a radiofrequency signal for light once; Wherein this digital signal processor comprises that a detecting unit comprises a comparer and a pulse wave counter, and a positive input terminal of this comparer receives this first signal, and a negative input end of this comparer receives this cutoff signal; This pulse wave counter is connected to an output terminal of this comparer and produces a pulse wave number according to this, makes this digital signal processor judge that according to this pulse wave number this discs is a blue light disk or a non-blue light disk.
Therefore, the present invention proposes a kind of difference device of discs, comprising: an optical read/write head has a plurality of laser and lens, wherein this optical read/write head is when a start-up routine, lights a non-blue laser in described a plurality of laser and shines on a discs and produce an electric signal; One digital signal processor produces a cutting signal of fixed value and exports a drive signal so that a motor driver is controlled these lens moves in a focus direction; And a radio frequency amplifier, in this lens moving process, receiving, handle this electric signal and produce one first signal, this first signal adds a resultant signal or a radiofrequency signal for light once; Wherein this digital signal processor comprises a detecting unit, and this detecting unit comprises a comparer, a blink-off circuit and a pulse wave counter, and a positive input terminal of this comparer receives this first signal, and a negative input end of this comparer receives this cutoff signal; One input end of this blink-off circuit is connected to an output terminal of this comparer; One input end of this pulse wave counter is connected to an output terminal of this blink-off circuit and produces a pulse wave number, makes this digital signal processor judge that according to this pulse wave number this discs is a blue light disk or a non-blue light disk.
Therefore, the present invention also proposes a kind of detection method of discs, applies to a discs and is written into a CD drive start-up routine afterwards, comprises the following steps: to open the non-blue laser in the optical read/write head; Lens of controlling in this optical read/write head move toward focus direction, and produce one first signal according to this, and this first signal adds a resultant signal or a radiofrequency signal for light once; Utilize a digital signal processor to produce a cutting signal of fixed value; Utilize a comparer relatively to utilize a pulse wave counter to obtain a pulse wave number behind this first signal and this cutoff signal; When this pulse wave number is 1, confirm that this discs is a blue light disk; And, when this pulse wave number is not 1, confirm that this discs is a non-blue light disk.
The invention has the advantages that and utilize the cheaper non-blue laser of price to judge that the discs that is written into is non-blue light disk and blue light disk.So, except the life-span that can prolong blue laser, also can effectively prevent the friction on lens and discs surface.
In order further to understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet accompanying drawing only provide with reference to and explanation, be not to be used for the present invention is limited.
Description of drawings
Fig. 1 is the function block diagram of a CD drive.
The signal schematic representation that Fig. 2 A and Fig. 2 B are shown when detecting DVD discs and CD discs for optical read/write head.
Fig. 3 A and Fig. 3 B are shown to be the synoptic diagram of known differentiation blue light disk and non-blue light disk.
Shown in Figure 4ly go out for sphere to differ synoptic diagram.
Shown in Figure 5ly go out for non-blue laser to shine synoptic diagram in blue light disk.
Fig. 6 A is shown to be difference device first embodiment of discs of the present invention.
The shown signal schematic representation when being written into blue light disk of Fig. 6 B.
The shown signal schematic representation when being written into non-blue light disk of Fig. 6 C.
The detection method that goes out for discs of the present invention shown in Figure 7.
Fig. 8 A is shown to be difference device second embodiment of discs of the present invention.
The shown signal schematic representation when being written into blue light disk of Fig. 8 B.
The shown signal schematic representation when being written into non-blue light disk of Fig. 8 C.
Description of reference numerals in the above-mentioned accompanying drawing is as follows:
10 optical read/write heads, 12 lens
14 coasters, 100 CD drive
110 discs, 120 spindle drive motors
122 rotating discs, 130 coaster motor
140 follow path circle 145 focusing coils
150 radio frequency amplifier, 160 first motor drivers
165 second motor drivers, 170 digital signal processors
311 top layers, 313 data Layers
333 data Layer 350CD discs
351 top layers, 353 data Layers
381-383 reflected signal 400 planes
500 blue light disks, 502 lens
511 top layers, 513 data Layers
610 optical read/write heads, 620 radio frequency amplifier
630 digital signal processors, 632 detecting units
635 comparers, 636 blink-off circuit
637 pulse wave counters, 640 motor drivers
Embodiment
According to embodiments of the invention, after being written into discs, CD drive is opened CD laser or DVD laser, and adding resultant signal SBAD according to the inferior light that produces, to distinguish the discs that is written into be to belong to non-blue light disk or blue light disk.Moreover it is to belong to non-blue light disk or blue light disk that the characteristic that the present invention utilizes sphere to differ (spherical aberration effect) is distinguished the discs that is written into.
Please refer to Fig. 4, it is shown to differ synoptic diagram for sphere.When sphere differed generation, light was through behind the outer collar region A1 of lens, and its focus A focuses on the plane 400.And light is through the inner circle area B1 of lens at this moment, and its focus B focuses on before this plane 400.Also promptly, when light through lens, the focus of its inner circle area and outer collar region does not have when overlapping, i.e. representative generation sphere differs.In fact, also have many focuses between Fig. 4 focus A and the B simultaneously, therefore when sphere differed generation, when lens were moved toward the plane, can be considered had a plurality of focuses in regular turn by this plane 400.
Moreover CD drive is utilized DVD laser or CD laser radiation can produce serious sphere when blue light disk and is differed, and differs and utilize DVD laser or CD laser radiation can not produce serious sphere when the video disc that is fit to separately.And promptly distinguishing discs according to above-mentioned characteristic, the present invention belongs to non-blue light disk or blue light disk.
Please refer to Fig. 5, it is shown to be that non-blue laser shines the synoptic diagram in blue light disk.When non-blue laser (DVD laser or CD laser) passes through blue light disk 500 top layers 511 with data Layer 513,, therefore can be considered a plurality of focuses continuously by blue light disk 500 top layers 511 and data Layers 513 because sphere differs seriously.
Owing to when a focus is passed through blue light disk 500 top layers 511 with data Layer 513, can produce two peak values.When a plurality of focuses are passed through blue light disk 500 top layers 511 continuously with data Layer 513, can be considered a plurality of signals stacks.Therefore, the inferior light of formation adds resultant signal SBAD (perhaps radiofrequency signal RF) promptly as shown in Figure 5.
Please refer to Fig. 6 A, it is shown to be difference device first embodiment of discs of the present invention.It comprises: an optical read/write head 610, a radio frequency amplifier 620, a digital signal processor 630, motor driver 640.Wherein, comprise a detecting unit 632 in the digital signal processor 630, it is blue light disk or non-blue light disk that this detecting unit 632 can be distinguished the discs that is written into.Moreover detecting unit 632 comprises a comparer 635 and a pulse wave counter (pulse counter) 637.
After discs is written into CD drive, when start-up routine, open the non-blue laser in the optical read/write head 610.Then, digital signal processor 630 control motor drivers make the lens in the optical read/write head move toward focus direction.Therefore, the exportable electric signal of optical read/write head to radio frequency amplifier 620 and generation time light adds resultant signal SBAD.
Moreover the detecting unit 632 in the digital signal processor 630 can receive time light and add resultant signal SBAD, and judges that the discs that is written into is non-blue light disk or blue light disk.And the positive input terminal of comparer 635 reception time light adds resultant signal SBAD in the detecting unit 632, and the negative input end reception one cutting signal of comparer 635 (slicing signal, Vth); And pulse wave counter 637 is connected to comparer 635 output terminals.
Please refer to Fig. 6 B, its shown signal schematic representation when being written into blue light disk.Clearly, when non-blue laser shines behind blue light disk, the inferior light that is produced in the process that lens move adds resultant signal SBAD and cutoff signal relatively, can make the single pulse wave of comparer 635 outputs, therefore, and 637 outputs " 1 " of pulse wave counter.Please refer to Fig. 6 C, its shown signal schematic representation when being written into non-blue light disk.Clearly, when non-blue laser shines behind non-blue light disk, the inferior light that is produced in the process that lens move adds resultant signal SBAD and cutoff signal relatively, can make two pulse waves of comparer 635 outputs, therefore, and 637 outputs " 2 " of pulse wave counter.Therefore, can to decide the discs that is written into according to the numeral of pulse wave counter in the detecting unit 632 637 output be non-blue light disk or blue light disk to digital signal processor 630.
Moreover, because adding resultant signal SBAD with time light, radiofrequency signal RF has similar waveform, above-mentioned inferior light adds resultant signal SBAD and also can replace with radiofrequency signal RF and also have identical judged result.
Please refer to Fig. 7, it is shown for the detection method of discs of the present invention.After discs is written into CD drive, when start-up routine, open the non-blue laser in the optical read/write head, as step S70.Then, the control lens move toward focus direction, and as step S72, so-called focus direction moves and can be lens position and move to position near discs by the position away from discs, perhaps, move to position away from discs by the position near discs.
The process that moves in lens can produce time light and add resultant signal SBAD, and can produce pulse wave after relatively time light adds resultant signal SBAD and cutoff signal, and the number of count enable pulse wave, as step S74).Then, when the pulse wave number is 1,, confirm that the discs that is written into is a blue light disk, as step S78 as step S76; When the pulse wave number is not 1,, confirm that the discs that is written into is non-blue light disk, as step S77 as step S76.
Moreover after the discs of determining to be written into was non-blue light disk, CD drive can also be proceeded the determining step of DVD discs or CD discs.And the mode of the determining step of DVD discs or CD discs is a lot, therefore repeats no more.
Please refer to Fig. 8 A, it is shown to be difference device second embodiment of discs of the present invention.In order to prevent that the disturbance that inferior light adds resultant signal SBAD from causing comparer 635 output terminal O to produce scintillation (glitch).Therefore, the second embodiment of the present invention increases a blink-off circuit (deglitch circuit) between comparer 635 output terminals and pulse wave counter 637, produces scintillation to prevent comparer 635 output terminal O.
Please refer to Fig. 8 B, its shown signal schematic representation when being written into blue light disk.When non-blue laser shines behind blue light disk, the inferior light that mobile lens produced add resultant signal SBAD and cutoff signal relatively after, comparer 635 output terminal O produce scintillation, therefore, blink-off circuit 636 can be removed scintillation and produce single pulse wave in output terminal O ' and make pulse wave counter 637 export " 1 ".Please refer to Fig. 8 C, its shown signal schematic representation when being written into non-blue light disk.When non-blue laser shines behind non-blue light disk, the inferior light that mobile lens produced add resultant signal SBAD and cutoff signal relatively after, comparer 635 can be exported two pulse waves, and because scintillation does not take place comparer 635 output terminal O, therefore, blink-off circuit 636 is failure to actuate and is made 637 outputs " 2 " of pulse wave counter.Therefore, can to decide the discs that is written into according to the numeral of pulse wave counter in the detecting unit 632 637 output be non-blue light disk or blue light disk to digital signal processor 630.
By embodiments of the invention as can be known, the present invention utilizes CD laser or DVD laser radiation can produce the characteristic that serious sphere differs on blue light disk, and then judges that the discs that is written into is to belong to non-blue light disk or blue light disk.Moreover, the invention has the advantages that and utilize the cheaper non-blue laser of price to judge that the discs that is written into is non-blue light disk and blue light disk.So, except the life-span that can prolong blue laser, also can effectively prevent the friction on lens and discs surface.
In sum; though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any those of ordinary skills; without departing from the spirit and scope of the present invention; when can doing various changes and retouching, so protection scope of the present invention is as the criterion when looking the scope that accompanying Claim defines.
Claims (7)
1. the difference device of a discs comprises:
One optical read/write head has a plurality of laser and lens, and wherein this optical read/write head is lighted a non-blue laser in described a plurality of laser and shone on a discs and produce an electric signal when a start-up routine;
One digital signal processor produces a cutting signal of fixed value and exports a drive signal so that a motor driver is controlled these lens moves in a focus direction; And
One radio frequency amplifier receives in this lens moving process, handles this electric signal and produce one first signal, and this first signal adds a resultant signal or a radiofrequency signal for light once;
Wherein this digital signal processor comprises a detecting unit, and this detecting unit comprises a comparer and a pulse wave counter, and a positive input terminal of this comparer receives this first signal, and a negative input end of this comparer receives this cutoff signal; This pulse wave counter is connected to an output terminal of this comparer and produces a pulse wave number according to this, makes this digital signal processor judge that according to this pulse wave number this discs is a blue light disk or a non-blue light disk.
2. device as claimed in claim 1, wherein this non-blue laser is DVD laser or a CD laser, and this non-blue light disk is a DVD discs or a CD discs.
3. device as claimed in claim 1, wherein to be this lens position move to position near this discs by the position away from this discs to this focus direction, perhaps, moves to position away from this discs by the position near this discs.
4. the difference device of a discs comprises:
One optical read/write head has a plurality of laser and lens, and wherein this optical read/write head is lighted a non-blue laser in described a plurality of laser and shone on a discs and produce an electric signal when a start-up routine;
One digital signal processor produces a cutting signal of fixed value and exports a drive signal so that a motor driver is controlled these lens moves in a focus direction; And
One radio frequency amplifier receives in this lens moving process, handles this electric signal and produce one first signal, and this first signal adds a resultant signal or a radiofrequency signal for light once;
Wherein this digital signal processor comprises a detecting unit, and this detecting unit comprises a comparer, a blink-off circuit and a pulse wave counter, and a positive input terminal of this comparer receives this first signal, and a negative input end of this comparer receives this cutoff signal; One input end of this blink-off circuit is connected to an output terminal of this comparer; One input end of this pulse wave counter is connected to an output terminal of this blink-off circuit and produces a pulse wave number, makes this digital signal processor judge that according to this pulse wave number this discs is a blue light disk or a non-blue light disk.
5. the detection method of a discs applies to a discs and is written into a CD drive start-up routine afterwards, comprises the following steps:
Open the non-blue laser in the optical read/write head;
Lens of controlling in this optical read/write head move toward focus direction, and produce one first signal according to this, and this first signal adds a resultant signal or a radiofrequency signal for light once;
Utilize a digital signal processor to produce a cutting signal of fixed value;
Utilize a comparer relatively to utilize a pulse wave counter to obtain a pulse wave number behind this first signal and this cutoff signal;
When this pulse wave number is 1, confirm that this discs is a blue light disk; And
When this pulse wave number is not 1, confirm that this discs is a non-blue light disk.
6. method as claimed in claim 5, wherein this non-blue laser is DVD laser or a CD laser, and this non-blue light disk is a DVD discs or a CD discs.
7. method as claimed in claim 5, wherein to be this lens position move to position near this discs by the position away from this discs to this focus direction, perhaps, moves to position away from this discs by the position near this discs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101731766A CN101661764B (en) | 2009-09-14 | 2009-09-14 | Distinguishing method and distinguishing device of optical discs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101731766A CN101661764B (en) | 2009-09-14 | 2009-09-14 | Distinguishing method and distinguishing device of optical discs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101661764A CN101661764A (en) | 2010-03-03 |
| CN101661764B true CN101661764B (en) | 2011-11-02 |
Family
ID=41789728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101731766A Expired - Fee Related CN101661764B (en) | 2009-09-14 | 2009-09-14 | Distinguishing method and distinguishing device of optical discs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101661764B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102402995A (en) * | 2010-09-17 | 2012-04-04 | 凌阳科技股份有限公司 | Method and device for judging number of data layers of optical disk slice |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1510676A (en) * | 2002-12-25 | 2004-07-07 | 建兴电子科技股份有限公司 | Optical medium identification method |
| CN1771550A (en) * | 2003-09-30 | 2006-05-10 | 三星电子株式会社 | Optical disc detecting method and apparatus thereof |
| CN1790519A (en) * | 2004-11-12 | 2006-06-21 | 三星电子株式会社 | Method of determining type of optical disc, and data recording and/or reproducing apparatus therefor |
-
2009
- 2009-09-14 CN CN2009101731766A patent/CN101661764B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1510676A (en) * | 2002-12-25 | 2004-07-07 | 建兴电子科技股份有限公司 | Optical medium identification method |
| CN1771550A (en) * | 2003-09-30 | 2006-05-10 | 三星电子株式会社 | Optical disc detecting method and apparatus thereof |
| CN1790519A (en) * | 2004-11-12 | 2006-06-21 | 三星电子株式会社 | Method of determining type of optical disc, and data recording and/or reproducing apparatus therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101661764A (en) | 2010-03-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6278672B1 (en) | Optical disc discriminating device, optical disc reproducing device and discriminating method | |
| US8149668B2 (en) | Optical disk drive and method for determining disk type | |
| JP2002117534A (en) | Optical disk reproducing device and kind of disk discriminating method | |
| US6952387B2 (en) | Optical disk playing apparatus and method for discriminating optical disk | |
| JP4990157B2 (en) | Combined optical medium, apparatus, and access method thereof | |
| CN101661764B (en) | Distinguishing method and distinguishing device of optical discs | |
| JP4226184B2 (en) | Information recording medium discriminating apparatus and information recording medium discriminating method | |
| JP4993174B2 (en) | Optical disc apparatus and optical disc type discrimination method | |
| CN1643590B (en) | Servo-controlling method of an optical disk apparatus | |
| TWI391923B (en) | Method and apparatus of discriminating opticsl disc | |
| CN100517475C (en) | Focus servo recovery processing method for optical disc device and optical disc device | |
| US7072263B2 (en) | Optical disc recording and playback apparatus | |
| US7548492B2 (en) | Optical disk recording/reproduction device and search method for information recording area of optical disk in the same | |
| KR100643418B1 (en) | Method of discriminating a kind of disc | |
| JP2008165904A (en) | Optical disk device, and medium type discriminating method | |
| JPH09190634A (en) | Optical disk device | |
| JPH1097755A (en) | Optical disk recording and reproducing device | |
| CN101465142B (en) | Optical disc apparatus and optical disc discriminating method | |
| US8031570B2 (en) | Optical disk unit and driving method therefor | |
| CN102194477B (en) | Optical disk drive | |
| CN102314919A (en) | Playback reproducer, back method and program | |
| JP2001126269A (en) | Optical disk device | |
| US20080151707A1 (en) | Optical disk device and control method of optical disk device | |
| JP2004335003A (en) | Thresholding circuit, thresholding method, and optical disk device | |
| KR20050043400A (en) | A control method of opical disk recording/reproducing apparatus |
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 |
Granted publication date: 20111102 Termination date: 20190914 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |