KR100653006B1 - Disc medium with location-identifying pattern on label side, and method and apparatus for printing on the label side - Google Patents

Abstract

A disc medium having a pattern for position identification on a label surface, a printing method on the label surface, and an apparatus therefor are provided to shorten a time required for printing a picture for which a user wishes on the label surface by using the pattern capable of recognizing a position. A control unit moves a beam of a recording part to skip an area in which a picture is not printed on a label surface of a disc medium(S701). The control unit detects a width of a pulse reflected from a line of a radial direction having a uniform width on the label surface of the disc medium by the beam, and discriminates whether the beam is located in a movement target point on the basis of the width of the pulse.

Description

Disc medium with location-identifying pattern on label side, and method and apparatus for printing on the label side}

1A shows the label side of a disc medium that supports write scribe,

FIG. 1B illustrates some patterns of the control feature zone of FIG. 1A,

Fig. 1C shows each divided area of the label surface of the disc medium supporting write scribe,

2 shows an example in which a picture is printed by a light scribe according to a conventional method,

3 illustrates a disk medium in which lines different from the label surface and the light reflection amount are engraved in the radial direction, according to an embodiment of the present invention.

4 shows a partial configuration of a disc recording apparatus for detecting a radial position of a disc medium from the radial line of FIG. 3, according to one embodiment of the present invention;

FIG. 5A shows the shape of a pulse detected as the beam traverses the radial line of FIG. 3,

5B illustrates a process of finding a target position based on a width of a pulse detected from a radial line in a CAV mode according to an embodiment of the present invention.

6 illustrates a process of finding a target position based on a width of a pulse detected from a radial line in a CLV mode according to another embodiment of the present invention.

7A is a diagram schematically illustrating a method of performing a light scribe while skipping an inner circumference without a picture according to an embodiment of the present invention.

7B is a diagram schematically illustrating a method in which a light scribe is performed while an inner circumference without a picture is skipped according to another embodiment of the present invention.

8 illustrates an example in which every section without a picture is skipped during a light scribe according to the present invention.

Explanation of symbols on the main parts of the drawings

10,11: light sensor 12,13: slice part

21: optical pickup 22: servo unit

23: optical drive 24: RF section

30: control unit 31: buffer

100: LS Application

The present invention relates to a disc recording medium having a pattern for identifying a position on a label surface, and a method and apparatus for printing a picture or the like on the label surface.

With the development of disc recording media and digital technology, many users have recorded their favorite video or audio contents on disc recording media to watch or listen to them through the player. It is included in.

As the number of disk recording media containing contents increases, the user may feel the necessity of distinguishing each disk media, and may also indicate that his or her favorite video or audio contents are recorded. To this end, manufacturers of disc media provide stickers and the like so that letters and the like can be recorded on the stickers and attached to the label surface or the case of the disc media.

However, when the disk medium is separated from the case, the information contained in the medium cannot be recognized, and when the sticker is attached to the label surface of the disk medium, the interface becomes dirty due to the adhesive.

For this reason, a method of writing a desired picture or letter by irradiating a recording beam directly onto a label surface of a disk medium coated with a material burned by light has been proposed. This is called a 'LightScribe'. .

Disc media supporting write scribes have a control feature zone 2 on the label side, after the clamping zone 1 as shown in Fig. 1A. The control feature zone 2 is composed of a speed control feature band 2a, a control feature outer ring 2b, and a mirror region 2c, as shown in FIG. 1B. 400 spokes are marked on the speed control feature band 2a, and a spherical or serrated pattern is formed on the outer ring 2b of the control feature. The media ID field 1, the sawtooth wave, the media ID field 2, the sawtooth wave, and the media ID field 3 are respectively divided into areas.

The pattern formed in the control feature zone 2 is detected by an encoder located at the inner circumference of the disk seating surface of the recording apparatus, which is a spherical pulse detected by the encoder from the spoke when the disk medium of FIG. 1A rotates. Depending on the period of the disk rotation speed can be identified. Therefore, the input data is synchronized (recorded) on the label surface based on the end point 2d of the index mark.

However, in order to print graphics or text on the label side of the disc recording medium, the radial position on the disc (hereinafter, the term 'position' means 'radial position' unless otherwise specified) must be correctly recognized. However, the information formed in the control feature zone 2 does not provide information about the radial position. Since it is necessary to accurately determine an arbitrary position on the disc to record the graphic or character desired by the user without any error on the label surface, the recording device does not know the current position. By moving as much as, the part of the figure to be drawn on the circumference of the moved position is recorded.

This movement operation is performed by controlling the actuator in the optical pickup to shift the recording beam, but when the shifted amount is out of the allowable range of the actuator's movable range, the sled motor is driven to transfer the optical pickup as desired. However, in such a transfer operation, there may occur a case where the transfer is more than or less than the transfer request due to the temperature rise or other disturbance factor of the current recording apparatus. However, even in this case, since the current position cannot be recognized from the label surface of the disc medium, it is not known that the beam is incorrectly moved, and thus recording is continued at the moved position. When this happens, the graphic or text that the user wanted to print on the label side is printed in the wrong format.

Further, even when no transfer error occurs during the transfer of the optical pickup, a section in which no picture or the like is drawn, for example, the section from the innermost circumference of the print area to the point where the icon 3a to be printed is located in the example of FIG. 2. As for (3b), each print line (printing circle) is moved to the outer periphery side by one printing line while passing through the recording speed (for example, 1/4 times (X / 4)). It takes time to print.

Accordingly, an object of the present invention is to solve the above problems, and to provide a recording medium having a pattern for recognizing an arbitrary position on a label surface and a method and apparatus for determining a position from the pattern. There is this.

In addition, another object of the present invention is to provide a printing method and apparatus for shortening the time required to print a picture desired by a user on a label surface by using a pattern that can recognize a position.

Disc disk according to the present invention for achieving the above object has a label surface comprising a layer burned by the incident beam, the label surface, a predetermined width reflecting the amount of light different from the label surface with respect to the incident beam At least one line having a characteristic feature is formed in the radial direction.

Further, the method and apparatus for printing a picture on a label surface according to the present invention includes moving a beam of recording means so as to skip an area where a picture is not printed on a label surface of a disc medium, and by means of the beam, The width of a pulse reflected from a line in a radial direction having a predetermined width on a label surface is detected, and it is characterized by determining whether the beam is located at a moving target point based on the width of the pulse.

In one embodiment according to the invention, one radial line is engraved on the label surface in which the amount of light reflection for the incident beam is larger than that of the label surface.

In one embodiment according to the invention, the disc medium is driven in CAV mode and the current position is determined from a given equation whose radius is inversely proportional to the width of the pulse by the line in the radial direction.

In another embodiment according to the present invention, the disk medium is driven in the CLV mode, and at the time of the movement of the beam, the disk medium is driven at a rotational speed corresponding to the target point to be moved (rotational speed to be a predetermined linear speed at the target point). The width of the pulse by the line in the radial direction is moved to a point at which the width of the pulse becomes equal to the detected pulse reference width.

In one embodiment according to the present invention, data indicating that there is no picture in the received data is discarded, and after skipping an area corresponding to the discarded data, a recording beam according to the input data is incident on the label surface to print the picture.

In another embodiment according to the present invention, after skipping the area according to a command to skip the area where the picture is not printed, the picture is printed by entering a recording beam according to the input data onto the label surface.

In one embodiment according to the present invention, the disk medium is rotated in the CLV mode when printing a picture.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 illustrates a label surface of a disk medium supporting light scribe according to an embodiment of the present invention.

In the disc medium of FIG. 3, a line 20 having a predetermined width d is drawn on the label surface in a radial direction, and the radial line 20 has a light reflection amount different from that of the label surface with respect to the incident beam. . That is, the amount of reflection may be large or small. In a preferred embodiment according to the present invention, the reflection amount is avoided in order to avoid confusion with the pulse detection by the area, taking into account that the reflection amount is reduced in the picture printed on the label surface (the portion where the coated material is burned by the recording beam). The radial line 20 is formed by coating with many substances.

In another embodiment according to the present invention, two or more lines having the same width may be drawn on the label surface, but this is only for allowing the recording device to quickly identify the position on the label surface. Same as when a line is drawn. When multiple radial lines are drawn on the label surface, they are all arranged at equal intervals.

FIG. 4 shows a part of a disc recording apparatus capable of determining a position based on a pulse detected from the radial line 20 engraved on the label surface of FIG. 3 according to an embodiment of the present invention. 4 shows only the components related to the light scribe, and the configuration of the disc recording apparatus related to the recording or reproducing of data not directly related to the present invention is omitted. In the following, description of general known operations of the recording apparatus not related to the present invention will be omitted.

4, a spoke optical sensor 11 for detecting a beam reflected from a speed control feature zone of a light scribe supporting disk medium, and a ring optical sensor for detecting a beam reflected from a pattern formed in the outer ring of the control feature ( 10) the slice units 12 and 13 for converting and outputting the electric signals detected and pre-amplified from each of the optical sensors 10 and 11 into square waves, respectively, by comparing with the reference level Vref, according to the input recording signal. An optical drive 23 for outputting an optical beam driving signal, an optical pickup 21 for irradiating a disk medium with an optical beam corresponding to the optical beam driving signal, and converting reflected light of a recording beam or a reading beam into an electrical RF signal; An actuator of the optical pickup 21 according to a binarized signal from the electrical RF signal, an RF unit 24 for outputting a focusing error (FE) signal and a tracking error (TE), a servo error signal or a control signal (actuator) And a servo unit 22 for controlling a sled motor for moving the optical pickup 21 and a spindle motor for rotating the mounted disk, and determining a beam position from the binarized signal of the RF unit 24. And a control unit 30 for performing a light scribe operation based on each square wave, a buffer 31 for exchanging data and commands / response with a host (not shown), and a picture for a light scribe provided by a user. And a Light Scribe (LS) application 100 which is an application program executed on the host for converting the data into data in a recording format.

First, a description will be given of how the control section 30 determines the position on the label surface of the disk medium.

The control unit 30 controls the servo unit 22 to rotate the mounted disk. The rotational speed of the disk can be maintained at a desired speed based on the number of pulses per unit time detected from the spoke light sensor 11. Meanwhile, the position determination method according to the present invention may be performed in a constant angular velocity (CAV) mode or a constant linear velocity (CLV) mode. First, a method of performing in a CAV mode will be described.

Since the CAV mode is a mode in which the rotational speed of the disc is constant (ω0) regardless of the current recording position, the crossing time of the radial line 20 of the recording beam or the reading beam emitted from the optical pickup 21 is the outer periphery. It gets shorter to the side. Therefore, the width td of the pulse corresponding to the crossing section of the radial line 20 of FIG. 5A, which is output from the RF unit 24, is the radius of the current position (the position where the recording beam or the reading beam is located). Inversely proportional to r).

Therefore, the control unit 30 transmits the exit beam of the optical pickup 21 through the servo unit 22 during the initial operation for the light scribe, the innermost circumference of the printing area, for example, just outside the mirror area. The width T0 of the pulse along the crossing of the radial line 20 at that position is detected and stored.

Since the outer diameter r0 of the mirror area is already known as a specification, the controller 30 detects the width td of the pulse along the crossing of the radial line 20 detected at an arbitrary position. The current position, that is, the radius r can be known according to the following equation (1).

r = r0 * T0 / td expression (1)

When the radius r of the current position is known, the number Nc of the printing line at that position can be known from the following equation (2).

Nc = (r-r0) / Lw equation (2)

Where Lw is the width of the printing line (corresponding to one or several tracks of the recording layer of the disc medium), and each printing line is a virtual concentric circle whose radius is increased by the width of Lw starting from the inner diameter of the printing area on the label surface. Corresponds to the circle.

Therefore, when moving to the target printing line, the control unit 30 moves the beam position of the optical pickup 21 to the target printing line through the servo unit 22 and is detected at that position. The pulse width td1 by the line 20 and the radius (or number of the printing line) of the position moved from the equations (1) and (2) can be grasped. If the identified position re is not the radius rt at which the target printing line is located, as shown in FIG. 5B, the optical pickup 21 may be spaced at an interval corresponding to the position error rt-re. After the driving for moving the beam position is performed through the servo unit 22 (S401), the process of identifying the moved position in the same manner is repeated to finally carry out the optical pickup at the radius rt of the target printing line. Let the exit beam of (21) be located.

Hereinafter, a method of performing position determination in the CLV mode will be described.

The CLV mode is a method in which the rotational speed of the disc is varied according to the current recording position so that the linear velocity at an arbitrary recording position, that is, the recording speed is always constant v0. By the way, as mentioned above, the absolute information for confirming the current position, ie, the radius, is not recorded on the label surface of the disk medium. Therefore, after moving the beam of the optical pickup 21 to the target print line to be moved, the moved position is adjusted based on the width td of the pulse detected from the radial line 20. This will be described in detail as follows.

When the control unit 30 moves to the position rt where the target printing line Nt is located, the control unit 30 applies a driving signal necessary for moving from the current position to the position of the target printing line through the servo unit 22. Then, on the assumption that the beam is located at the target position rt, the rotational speed omega t of the disk medium is adjusted according to the following equation (3).

ωt = r0 * ω0 / rt (3)

Where rt = r0 + Nt * Lw, Lw is the width of the printing line determined by the recording device, r0 is the value of the standard corresponding to the outer diameter of the mirror area, and ω0 is the value already known by the recording device. This is also the preset value of the recording device when the picture is printed at the position, which is the rotational speed at which the recording speed v0 is set, for example, 1/4 of the basic speed (i.e., X / 4).

However, if the position in which the beam is moved according to the movement request is a position (re = rt + Δr) deviated from the target position rt as in the example of FIG. 6, the linear velocity v1 at the moved position is determined. It becomes faster by Δv (= ωt Δr) than the recording speed v0. Therefore, the width of the pulse detected from the radial line 20 through the optical pickup 21 at the current position is reduced. However, since the width of the radial line 20 is constant, the time taken to traverse the width along the arc at the same linear velocity at any position is the same, so the detected pulse width must be constant. Therefore, since the reduced pulse width is based on an error of the moving position, the controller 30 may control the pulse width td by the radial line 20 currently detected through the optical pickup 21 until T0 becomes T0. The predetermined rotational speed (ωt) is moved inward little by little while maintaining it (S501). T0 is a value for the pulse width of the radial line detected when the disc was rotated to have an X / 4 recording speed at the outer diameter of the mirror area (start position of the print area on the label surface) before the start of the scribe to the disk medium.

When the detected pulse width td is greater than T0, the controller 30 moves the beam position of the optical pickup 21 little by little while maintaining the predetermined rotational speed? T as it is. During this movement, the width of the pulse detected from the radial line 20 is continuously monitored. When the width reaches T0, the movement is stopped and the position is determined to be the target movement position rt.

A light scribing method according to an embodiment of the present invention will be described on the assumption of the target position shifting and discriminating method described in detail above.

First, the LS application 100 converts a given or selected picture from a user into a bit stream for write scribe. A method of converting is illustrated in FIG. 7A, with a drawing on each print line (ie, a printing circle) relative to an arbitrary baseline, for example, an upper vertical line 7b of the space in which the picture is to be printed. A bit stream that corresponds to bit '1' in the part and bit '0' in the part without a picture is generated (or vice versa) and stored in a storage means, for example, a hard disk. Since each printed line has a different circle circumference, a different amount of data is allocated. If K bytes are processed per second at a writing speed of v0 during a write scribe, the bits allocated by the LS application 100 to each print line Nc are used. The number fn (Nc) is shown in the following equation (4).

fn (Nc) = 8K2π (NcLw + r0) / v0 (bits) Equation (4)

That is, the LS application 100 allocates fn (Nc) bits for each print line Nc according to Equation (4) starting from the print line of the inner circle, and if there is a picture at the corresponding bit position, the bits are allocated. If is not set to '1', the data 71 for write scribing (for LS) allocated to '0' (or vice versa) is constituted. At this time, data may not be generated for the outer circumferential region 7a without a picture. Then, at the end of the constructed data, a message of the end command of the write scribe is added.

The LS data generated and stored as described above is sequentially read from the storage means and provided to the controller 30 through the buffer 31. Then, the control unit 30 reads the data buffered in the buffer 31 in the unit corresponding to the printing line according to Equation (4) and prints a bit value indicating that there is a picture. Discard the read data until it is. At this time, the number of printed lines corresponding to the discarded data is stored. The operation of reading out data from the buffer 31 is significantly faster than the operation of processing a recording signal according to the data by entering the label surface of the disk medium at a recording speed.

When the controller 30 encounters data of a print line having a bit value indicating that there is a picture in the buffer 31, the controller 30 controls the number of print lines stored by the initial operation for light scribing by the number of previously stored print lines. The beam of the optical pickup 21 is moved from the innermost circumference r0 to the outer circumference side (S701). That is, if the number of stored printed lines is Nskip, the beam is moved to the point rt corresponding to (Nskip · Lw + r0). The movement to the target point rt is performed according to the above-described method, and when it is determined that the target point rt has been reached, the controller 30 switches to CLV mode driving when the current CAV mode driving is performed. The rotational speed is adjusted so as to be a predetermined linear velocity v0 at the corresponding position, and it is monitored whether the index mark is detected from the pattern of the signal detected from the ring optical sensor 10. When the index mark is detected, the picture is printed while sequentially applying the recording signal according to the data of the printing line having a bit value indicating that there is a picture and the subsequent data to the optical drive 23 starting from the end point. . This printing operation proceeds until a write scribe end command message is received.

By the above method, the inner circumferential side print area 7d without data is not performed at all, and the entire print time for the light scribe is significantly reduced by skipping the area while performing only data reading. .

Hereinafter, a light scribing method according to another embodiment of the present invention will be described.

First, the LS application 100 converts a given or selected picture from a user into a bit stream for write scribe. At this time, as shown in Fig. 7B, no data is generated for the area 7d without a picture from the innermost circumference of the print area. When scanning a circle in the unit of a printing line having a width of Lw and encountering an area with a picture, the bit '1' is displayed from the print line (that is, the print circle) and the bit '0' is used for the non-picture area. The corresponding bit stream 72 is generated and stored in the storage means. As in the above embodiment, the LS application 100 allocates the number of bits fn (Nc) to each print line according to Equation (4).

On the other hand, the LS application 100 also stores the number of skipped lines Nskip without generating data from the innermost circumference of the print area and generates an Nskip line jump command accordingly, thereby generating the Nskip line jump command. Place it in

Also in this embodiment, data may not be generated for the outer circumferential region 7a without a picture. Then, at the end of the constructed data, a message of the end command of the write scribe is added.

The LS data generated as described above is sequentially provided to the controller 30 through the buffer 31. Then, the controller 30 recognizes the line jump command located at the head of the data buffered in the buffer 31, and Nskip from the innermost circumference r0 of the print area located by the initial operation for the light scribe. The beam of the optical pickup 21 is moved as much as the number of printed lines in step S702. That is, the beam is moved to a point rt corresponding to (Nskip · Lw + r0). The movement to the target point rt is performed according to the above-described method, and when it is determined that the target point rt has been reached, the controller 30 switches to CLV mode driving when the current CAV mode driving is performed. The rotational speed is adjusted to a predetermined linear velocity at the corresponding position, and the index mark is detected from the pattern of the signal detected by the ring optical sensor 10, and when the index mark is detected, starting from the end point, the buffer ( The printing signal according to the LS data in 31 is sequentially applied to the optical drive 23, and the pictures are printed one by one printing lines. This printing operation proceeds until a write scribe end command message is received.

By the above method, the print area 7d of the inner circumference without data is simply skipped without performing the recording operation, so that the total printing time for the light scribe is significantly reduced.

Up to now, in the printing example illustrated in FIG. 8, the method of skipping the section 81 of the first printing line with a picture from the innermost circumference has been described, but there is a blank section 82 in which no picture is printed between the picture and the picture. Even when there is, the corresponding section may be skipped by applying the method of the embodiment described based on FIG. 7A or 7B.

As mentioned above, preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and those skilled in the art can improve other various embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. Changes, substitutions or additions will be possible.

The present invention described above in detail enables the user to identify the position on the label surface of the disc medium during a light scribe, thereby preventing the user from incorrectly printing a picture and skipping the section where the picture is not printed. This makes it possible to shorten the time of the light scribe.

Claims (13)

In the method for printing on the label side of a disk medium, Moving the beam of the recording means to skip an area where a picture is not printed on the label surface of the disc medium; And Detecting the width of a pulse reflected from a line in a radial direction having a predetermined width on a label surface of the disc medium by the beam, and determining whether the beam is located at a moving target point based on the width of the pulse; Method comprising the steps. The method of claim 1, The first step is to skip an area corresponding to data representing no picture in the received data. The method of claim 1, In the first step, the corresponding area is skipped by a command to skip a section in which a picture is not printed. The method of claim 3, wherein Wherein said command is generated by an application coding a picture to be printed on said label surface into a bit stream for printing. The method of claim 1, And wherein the moving target point is a position of an inner circumferential printing line of a corresponding area on the label surface. The method of claim 1, And positioning the recording beam of the recording means on the label surface in accordance with the input data for the picture printing area, and printing the picture when located at the movement target point. The method of claim 6, And the picture printing in step 3 is performed while driving the disk medium in the CLV mode. An apparatus for printing a picture on a label surface of a disk medium, A recording unit which applies an optical driving signal to the optical pickup according to the recording signal; A buffer for communicating with the host; A reproduction unit for converting the beam of the optical pickup reflected from the label surface into an electrical signal having a binary level; And The rotation of the disk medium is controlled, and in the converted electrical signal, a width of a pulse reflected from a line in a radial direction having a predetermined width on a label surface of the disk medium is detected, and the width of the disk medium is determined based on the width of the pulse medium. It is configured to include a controller for determining the beam position of the optical pickup, And the controller controls the beam movement of the optical pickup to skip an area where a picture is not printed on the label surface of the disc medium in accordance with data or information received through the buffer. The method of claim 8, And the controller discards the data indicating no picture from the data received in the buffer and skips the area corresponding to the discarded data. The method of claim 8, And the controller skips the corresponding area by a command of the host to skip a section in which a picture is not printed, received through the buffer. The method of claim 8, And the controller moves the beam of the optical pickup to a position of an inner circumferential print line of a region in which a picture to be printed corresponds on the label surface according to data or information received through the buffer. The method of claim 1, And when the beam is positioned at a moving target point by the skip operation, the controller prints a picture by causing the recording beam of the optical pickup to be incident on the label surface according to input data to the picture print area. Device. The method of claim 12, And said controller drives said disk medium in CLV mode during said picture printing.

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