CN100428336C - CD-RW and control device for writing volume label optical disc - Google Patents
CD-RW and control device for writing volume label optical disc Download PDFInfo
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- CN100428336C CN100428336C CNB2006100049013A CN200610004901A CN100428336C CN 100428336 C CN100428336 C CN 100428336C CN B2006100049013 A CNB2006100049013 A CN B2006100049013A CN 200610004901 A CN200610004901 A CN 200610004901A CN 100428336 C CN100428336 C CN 100428336C
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Abstract
A control device used on optical disc with writing volume label consists of a digital signal processor for outputting a focusing servo control signal, a D/A signal converter for converting said servo control signal to be an analog output signal, a low-pass filter for receiving said analog output signal and form removing high frequency in said analog output signal off, a driving circuit for receiving and amplifying said analog output signal with no high frequency, and an optical read/write head actuator for controlling a lens according to amplified analog output signal with no high frequency.
Description
Technical field
The present invention for a kind of CD writer be applied to the control device of writable label face discs, finger utilizes the control device of optical read/write head in the process that a CD writer describes the label face on the writable label face discs especially.
Background technology
With regard to present computer industry, have the CD writer that a large amount of computer datas can be backed up, be that a kind of indispensable basic computer is equipped with.Carry out the user of data backup for often using CD writer, be after having backed up important data on the write formula discs of set pattern in appearance, regular meeting feel not only dull and but also the discs back side of the special individualized pattern of tool not, the data that can't represent burning of own institute and backup to finish appositely; And conventional practice is to utilize Mike's pen or CD special pens, directly indicates the title of the data of finishing that back up at the back side of discs; Yet, just utilize the printer that now can be used to print discs back side label more on the market at last, carry out the specified printing of representing the pattern or the literal of its file data of user, also might be because the weight distribution inequality of print paper, or the paper of being printed is pasted insecure at the back side of this discs, generation comes off and blocks the situation of CD-ROM drive, causes the difficulty that reads in the running.
Therefore, the manufacturer that partly makes discs is just arranged on the market at present, develop on the back side (or being called label surface) that a kind of particular dye layer and be coated on general optical disk, form writable label face discs (hereinafter to be referred as the special light disc).And the optical read/write head that utilizes CD writer is coated with pattern or the literal of drawing this special light disc filemark surface.The picture and text of this special light disc filemark surface describe technology be meant data write data surface (Data Layer) on this special light disc after, turn-over and putting back in the former CD writer separately again, and with this label face at the back side of this data surface in this CD writer in order to carry out the optical read/write head that data write, with the laser beam of using this identical optical read/write head to be got, be radiated at the particular dye layer on the label surface, make this layer to produce chemical reaction and show pattern or the literal that the user wants; Yet the restriction that this technology is present only can be drawn out the pattern of serigraphy or GTG on this particular dye layer, promptly is the pattern that can only present pattern with the difference of the shade of single colour system.
Seeing also Fig. 1 (a), is the label face synoptic diagram of a special light disc 100.From the above as can be known, on this label surface, has the particular dye layer that can demonstrate picture and text, and the picture and text of this kind discs label face describe technology can data write finish after, directly with disc turn-over and putting back in the former CD-ROM drive (this figure is not shown) separately, and use same optical read/write head to carry out describing of label face.Owing on the label face of this special light disc 100, do not have as the groove on the data surface (groove) and exist, therefore in order can on label surface, to locate, just being provided with 400 spokes that exist in the equal angles mode (spoke) as shown in this figure on the inner ring of this special light disc 100 indicates, and this CD driver that can support this kind to describe technology just is provided with a spoke code translator, in order to the position control as the angle of special light disc rotation.And this optical read head is to utilize the step motor (Stepping Motor) in this CD-ROM drive to move radially, and therefore position control is radially just carried out by this step motor.So, when utilizing this spoke code translator and this step motor can provide optical read/write head on this label face, to describe, as the usefulness of the location of relative position on the special light disc.
It is unit with per 100 respectively that its 400 spokes indicate, and is evenly distributed in four quadrants on this special light disc 100, can be distinguished by spoke S0, S100, S200 and S300 respectively, wherein and successively is defined as spoke S0 to spoke S399.When optical read/write head was described on this label face, its track was constituted with a plurality of concentric circles.Be to be that unit sends when therefore, host side (Host) transmits and to describe data with track and spoke.Can learn the data of describing that ad-hoc location will write on the special light disc according to the information of track and spoke.As the first track T1 among Fig. 1 (a) and the second track T2,, the required data of describing of each track are drawn in regular turn form one by one to such an extent as to n track Tn afterwards and is written to the mode of spoke S399 from spoke S0.
Aforesaid way is the location of method CD writer is done to(for) the optional position on the special light disc filemark surface.Yet CD writer is in the process of describing, and focus control also is a very important ring.In general, the data surface of discs is because reflection potential is fairly good, therefore, utilize focusing servo-drive system (Focusing Servo System) to do closed loop control, the lens (Lens) that make CD-ROM drive can control on the optical read/write head are positioned at the focus of laser beam on the data face.Yet the label of special light disc can't use closed loop control in the face of burnt control, must use and open circuit controls.Therefore, CD writer must be carried out a learning procedure (Learning Step) before beginning to describe the label face, in order to learn discs when rotated, and the relation between the amplitude of beat and the discs anglec of rotation up and down.That is after the special light disc was inserted CD writer, discs can begin rotation.And before beginning to describe, optical read/write head can be launched the label face of lower-powered laser beam in the special light disc, in order to decide the control mode of lens on the optical read/write head (Lens) according to the situation that reflects and the mode of controlling is recorded in the internal memory, this step is learning procedure.That is to say, after learning procedure is finished, the CD burning chance is clearly known spoke and the discs relation of beat up and down, and obtains one and make up for voltage (Offset Voltage), in order to superposition (Superpose) on focus servo control signal (Focusservo control Signal).
Shown in Fig. 1 (b), its for CD writer through the synoptic diagram that concerns between the amplitude of the beat up and down that obtained behind the learning procedure and the spoke.In Fig. 1 (b), transverse axis unit is a spoke, and the longitudinal axis then is the discs amplitude of beat up and down, that is, after learning procedure was finished, CD writer can be determined on each specific spoke of special light disc 100, the lens of optical read/write head and the distance relation between the discs.As Fig. 1 (b) is example, when the Sa of spoke, Sb, Sc, Sd, Se were special light disc 100 beats, the focus of lens just was positioned on the special light disc 100, and the beat of discs can be near lens between Sa and Sb, and the beat of Sb and Sc discs can be away from lens, and the rest may be inferred.And the utilization above-mentioned relation, CD writer must produce makes up for the lens that voltage is controlled optical read/write head, make when reality is drawn, between each specific spoke lens and discs, can keep equidistant, that is, lens can move up and down along with the beat up and down of discs, make that the pattern color that forms on the label surface is even.
Seeing also Fig. 1 (c), is the function block schematic diagram of a CD-ROM drive 10.This CD-ROM drive 10 can be described technology to the picture and text that this special light disc 100 carries out above-mentioned label surface.Thus shown in the figure as can be known, the inside of this CD-ROM drive 10 mainly has the actuator (Actuator) 14 in a Digital System Processor 11, a digital-to-analog signal converter 12, one drive circuit (Power Drive) 13 and one optical read/write head.In general, when this CD-ROM drive 10 was described the label face, Digital System Processor 11 can produce the focus servo control signal.Because CD-ROM drive 10 finished learning procedure, this focus servo control signal can comprise simultaneously and makes up for voltage.Yet because Digital System Processor 11 output signals are digital form, and digital-to-analog signal converter 12 can be converted into a simulation output signal according to the focus servo control signal of Digital System Processor 11 outputs.This simulation output signal is that actuator 14 in the may command optical read/write head is in order to the lens in the mobile optical read/write head again after overdrive circuit 13 amplifies.
Please refer to Fig. 1 (d), it is shown to be a simulation output signal synoptic diagram of digital-to-analog signal converter 12 outputs.Make up for voltage owing to comprise in the focus servo control signal, in order to the distance between control lens and the discs.Therefore, can continue to produce the voltage transformation that height does not wait in the simulation output signal of digital-to-analog signal converter 12.As everyone knows, digital-to-analog signal converter 12 utilizes a plurality of voltage quasi positions to approach actual analog signal.Therefore, a simulation output signal of digital-to-analog signal converter 12 outputs is actually between different voltage quasi positions and beats.Observing this signal more further can find, in order be apace to skip to another voltage quasi position, just when can being produced the reforming phenomena of high frequency when jumping another voltage quasi position initial by a voltage quasi position after, the simulation output signal can arrive another voltage quasi position by a voltage quasi position wherein.And above-mentioned simulation output signal can cause the machinery concussion of the actuator 14 generation rules of optical read head after overdrive circuit 13 amplifies.
See also Fig. 1 (e), when the actuator 14 of optical read/write head produces the machinery concussion of rule, the synoptic diagram that the label face of this special light disc 100 is described to finish.By as can be known aforementioned, the concussion of actuator 14 pests occurrence rules of this optical read/write head, make lens near focus, to shake, therefore cause the label face of this special light disc 100 to describe just can be created in different angles depth regular patterns, and therefore caused between the obvious depth contrast every existence, this phenomenon stays the flaw that is observed easily to the label surface picture and text of completing and exists can be remarkable especially when describing with color stage.Shown in Fig. 1 (e), we describe the part zone of this special light disc 100 label faces coming with the mode of color stage, yet, can find shown in the figure thus, presenting on this label surface has certain rule and the generation of striped at interval of the tangible depth is arranged, in each pocket that is surrounded as in the figure dotted line scope, just relative darker of the color range that it presented, yet the zone between dotted line scope and dotted line scope, be crack between the left and right sides of its each pocket, the color range that it presented is then more shallow relatively.
How to propose the picture and text that can effectively solve this discs label face and describe the problem that technology is produced in describing process so that the whole picture and text describing to finish indicate can be more attractive in appearance, just become fundamental purpose of the present invention.
Summary of the invention
The object of the present invention is to provide a kind of CD writer and the control device that is applied to writable label face discs.
For achieving the above object, CD writer provided by the invention is applied in can be in order on the label surface described on the discs, and this CD writer includes:
One Digital System Processor, this Digital System Processor can be exported a focus servo control signal, and comprise one in this focus servo control signal and make up for voltage;
One digital-to-analog signal converter is linked to this Digital System Processor, in order to this focus servo control signal is converted to a simulation output signal;
One low-pass filter is linked to this digital-to-analog signal converter, in order to receive this simulation output signal and to remove a HFS in this simulation output signal;
One drive circuit is linked to this low-pass filter, in order to receive and to amplify this simulation output signal that this HFS is removed; And
The actuator of one optical read/write head is linked to this driving circuit, controls lens in order to this simulation output signal that this HFS after amplifying according to this driving circuit is removed.
Described CD writer, wherein this low-pass filter is a simulation low-pass filter.
CD writer provided by the invention is applied in can be in order on the label face of describing on the discs, and this CD writer includes:
One Digital System Processor, this Digital System Processor can be exported a focus servo control signal, and comprise one in this focus servo control signal and make up for voltage;
One wave digital lowpass filter is linked to this Digital System Processor, in order to receive this focus servo control signal and to remove a HFS in this focus servo control signal;
One digital-to-analog signal converter is linked to this wave digital lowpass filter, in order to receiving this focus servo control signal that removes HFS of this wave digital lowpass filter output, and produces a simulation output signal;
One drive circuit is linked to the digital-to-analog signal converter, in order to receive and to amplify this simulation output signal; And
The actuator of one optical read/write head is linked to this driving circuit, controls lens in order to this simulation output signal after amplifying according to this driving circuit.
By the present invention, utilize this low-pass filter can eliminate the characteristic of high frequency noise, make when the special light disc is described, produce the problem of rule vibrations in the time of can not causing the actuator control lens of this optical read/write head because of the conversion of voltage, thereby it is fixing to make distance between lens and the special light disc keep, and can avoid producing when describing the obvious depth flaw of striped at interval described in prior art.
Description of drawings
Fig. 1 (a) is the label face synoptic diagram of special light disc.
Fig. 1 (b), for CD writer through the synoptic diagram that concerns between the amplitude of the beat up and down that obtained behind the learning procedure and the spoke.
Fig. 1 (c) is the function block schematic diagram of known CD-ROM drive.
Fig. 1 (d), its shown simulation output signal synoptic diagram for the output of digital-to-analog signal converter.
Fig. 1 (e), the synoptic diagram of describing to finish for the label face of known special light disc.
Fig. 2 (a) is the label face synoptic diagram of special light disc.
Fig. 2 (b) is the function block schematic diagram of CD-ROM drive of the present invention.
Fig. 2 (c), its shown simulation output signal synoptic diagram for low-pass filter output.
Embodiment
The present invention embodiment in conjunction with the accompanying drawings elaborates, and making has more deep understanding to the present invention.
Please consult Fig. 2 (a) and Fig. 2 (b) simultaneously.In Fig. 2 (a), be the label face synoptic diagram of a special light disc 200; And in Fig. 2 (b), be the function block schematic diagram of CD-ROM drive 20 of the present invention.In preferred embodiment of the present invention, we represent the discs of the present invention in inventing with this special light disc 200, represent CD writer of the present invention with this CD-ROM drive 20 simultaneously.This special light disc 200 is described in prior art, can carry out except having that data write, the data surface of burning, and the reverse side of its data surface is to can be used to support that this CD-ROM drive 20 carries out the label surface that its discs back side picture and text are described technology.
In preferred embodiment of the present invention, the label face of this special light disc 200 has the particular dye layer that can draw out serigraphy or grey scale pattern equally, and has the spoke sign of describing to locate usefulness equally.In addition, by shown in Fig. 2 (b) as can be known, the inside of this CD-ROM drive 20 mainly includes: the actuator 24 of a Digital System Processor 21, a digital-to-analog signal converter 22, one drive circuit 23, an optical read/write head and a low-pass filter 25 (low pass filter); Thus shown in the figure as can be known, Fig. 1 (c) difference in itself and the prior art is to add in this CD-ROM drive 20 of the present invention into a low-pass filter 25, and the setting of this low-pass filter 25, be arranged between this digital-to-analog signal converter 22 and this driving circuit 23, and signal is linked to this digital-to-analog signal converter 22 and this driving circuit 23 simultaneously.
From the above, before this CD-ROM drive 20 will be described the label face of this special light disc 200 in this preferred embodiment, same meeting is carried out learning procedure (learning step) described in prior art to this label surface earlier, detects with the situation of beat up and down to this special light disc 200.
When learning procedure was finished, representative began to describe this label face of this special light disc 200, and the lens of optical read/write head (this figure is not shown) can be kept distance between lens and this special light disc 200 via the control of actuator.Therefore, this focus servo control signal of Digital System Processor 21 output can comprise simultaneously and makes up for voltage.Yet,, and when each voltage quasi position initial, produce the reforming phenomena of high frequency because digital-to-analog signal converter 22 can produce stair-stepping simulation output signal.
At above-mentioned defective, the present invention's HFS that increase by one low-pass filter 25 will be simulated in the output signal between digital-to-analog signal converter 22 and driving circuit 23 is especially eliminated.Therefore, shown in Fig. 2 (c), after the HFS in the simulation output signal was removed, its signal can be more smooth-going.And via after driving circuit 23 amplifications, the reforming phenomena of actuator 24 rules of optical read/write head can reduce, that is to say, label face at this special light disc 200 is being described process, the focus of the lens of optical read/write head can be radiated on the label face of special light disc 200, makes the label face of known special light disc can disappear at the pattern of describing the back depth rule that is produced.
Moreover removing of the HFS of focus servo control signal can also utilize the mode of digital signal processing to realize.For instance, between the Digital System Processor 11 of Fig. 1 (c) and digital-to-analog signal converter 12, insert a wave digital lowpass filter, can reach the effect of low-pass filter 25 analog among Fig. 2 (b).The resolution of the focus servo control signal that wave digital lowpass filter can be exported Digital System Processor improves again.For example, between two voltage quasi positions of focus servo control signal, provide plural height accurate position again, and the digital-to-analog signal converter will be converted to simulation during output signal, the simulation output signal can be more level and smooth, and HFS equally can reduce, and then make the reforming phenomena of actuator rule of optical read/write head reduce, and then reach problem to be solved by this invention.
Therefore, comprehensive the above as can be known, by invention of the present invention, utilize this low-pass filter 25 can eliminate the characteristic of high frequency noise, make when special light disc 200 is described, do not produce the problem of rule vibrations in the time of can not causing the actuator 24 control lens of this optical read/write head because of the conversion of voltage, thereby it is fixing to make distance between lens and the special light disc 200 keep, can avoids when describing, producing the flaw of the obvious depth interval striped described in prior art.Hereat, can successfully solve the problem described in prior art, and reach the fundamental purpose of the present invention's development, but the present invention invents to such an extent that thought and be to modify as all by the personage Ren Shi craftsman who has the knack of this skill, right neitherly take off desire protection content as attached claim institute.
Claims (2)
1. a CD writer is applied in the label face on the discs, and this CD writer includes:
One Digital System Processor, this Digital System Processor can be exported a focus servo control signal, and comprise one in this focus servo control signal and make up for voltage;
One digital-to-analog signal converter is linked to this Digital System Processor, in order to this focus servo control signal is converted to a simulation output signal;
One simulation low-pass filter is linked to this digital-to-analog signal converter, in order to receive this simulation output signal and to remove a HFS in this simulation output signal;
One drive circuit is linked to this simulation low-pass filter, in order to receive and to amplify this simulation output signal that this HFS is removed; And
The actuator of one optical read/write head is linked to this driving circuit, controls lens in order to this simulation output signal that this HFS after amplifying according to this driving circuit is removed.
2. a CD writer is applied in the label face on the discs, and this CD writer includes:
One Digital System Processor, this Digital System Processor can be exported a focus servo control signal, and comprise one in this focus servo control signal and make up for voltage;
One wave digital lowpass filter is linked to this Digital System Processor, in order to receive this focus servo control signal and to remove a HFS in this focus servo control signal;
One digital-to-analog signal converter is linked to this wave digital lowpass filter, in order to receiving this focus servo control signal that removes HFS of this wave digital lowpass filter output, and produces a simulation output signal;
One drive circuit is linked to the digital-to-analog signal converter, in order to receive and to amplify this simulation output signal; And
The actuator of one optical read/write head is linked to this driving circuit, controls lens in order to this simulation output signal after amplifying according to this driving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100049013A CN100428336C (en) | 2006-01-11 | 2006-01-11 | CD-RW and control device for writing volume label optical disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100049013A CN100428336C (en) | 2006-01-11 | 2006-01-11 | CD-RW and control device for writing volume label optical disc |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101000773A CN101000773A (en) | 2007-07-18 |
| CN100428336C true CN100428336C (en) | 2008-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100049013A Expired - Fee Related CN100428336C (en) | 2006-01-11 | 2006-01-11 | CD-RW and control device for writing volume label optical disc |
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| Country | Link |
|---|---|
| CN (1) | CN100428336C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102214478A (en) * | 2010-04-12 | 2011-10-12 | 广明光电股份有限公司 | Method for compensating label surface of optical disk radially |
| CN104269181B (en) * | 2014-09-25 | 2017-08-11 | 河南机电高等专科学校 | A kind of planetary CD writer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1519820A (en) * | 2002-12-26 | 2004-08-11 | 雅马哈株式会社 | Optical disk face identifying system and optical disk driver |
| US20050265145A1 (en) * | 2004-05-31 | 2005-12-01 | Kabushiki Kaisha Toshiba | Disk drive and method of controlling position of the pickup |
| US20050265156A1 (en) * | 2004-05-28 | 2005-12-01 | Kabushiki Kaisha Toshiba | Optical disc label recording method and apparatus using this method |
-
2006
- 2006-01-11 CN CNB2006100049013A patent/CN100428336C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1519820A (en) * | 2002-12-26 | 2004-08-11 | 雅马哈株式会社 | Optical disk face identifying system and optical disk driver |
| US20050265156A1 (en) * | 2004-05-28 | 2005-12-01 | Kabushiki Kaisha Toshiba | Optical disc label recording method and apparatus using this method |
| US20050265145A1 (en) * | 2004-05-31 | 2005-12-01 | Kabushiki Kaisha Toshiba | Disk drive and method of controlling position of the pickup |
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| Publication number | Publication date |
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| CN101000773A (en) | 2007-07-18 |
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