JP2002531290A - Digital disk print processing mechanism - Google Patents

Abstract

(57) In a print processing apparatus for printing desired information on a digital disk having an ink jet print head (6), the apparatus further comprises a linear movement for driving the ink jet print head along a radial axis. The mechanism (8) and the laser means are installed on the disk surface opposite to the disk surface on which the read / write processing of the disk is performed, or on the disk surface opposite to the disk surface on which the read / write processing of the disk is intended to be performed. And a mechanism (2) for rotating the disk. The upper surface of the disk is the side opposite to the disk surface on which read / write processing is performed by the laser means or the disk surface opposite to the disk surface on which read / write processing is intended to be performed. The inkjet printhead is mounted on the top of the disk in such a manner that ink droplets are ejected vertically onto the surface of the disk. The inkjet printhead includes a plurality of nozzles (7) arranged in a row on a radial axis of the disk. In the inkjet print head, a plurality of ink containers may be further arranged on the surface on which the plurality of nozzles arranged in a line are arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] Technical Field The present invention relates to a method of printing desired information on the printing processing mechanism and a digital disk.

[0002] Data, voice, images for a recording medium of the disk (while discs) type high-density, large capacity, well known and, CDROM, an optical disk, a magneto-optical disk, a digital video disc (DVD), It is known in the world as Laser Disc (registered trademark).

[0003] These disc-type recording media have in common that they are all made of plastic (usually polycarbonate) and are flat, thinly formed discs. The recording process is performed by optically stimulating or magnetically stimulating a photosensitive substrate embedded in the plastic substrate.

[0004] Initially, all such discs were already provided with data recorded therein, but at last digital data could be recorded, and furthermore,
Devices that can repeatedly record and erase digital data have become available.
At present, as a recordable disc on the market, a CD-R in which data can be recorded only once, and the recorded data cannot be erased, or data can be repeatedly read and written, and it is possible to erase written data. CD-WR is known. Other new types of writable discs in the early stages of marketing include magneto-optical discs and DVD-Ram discs.

[0005] These new types of writable discs have a very large data storage capacity (CD-R and CD-WR have a data storage capacity of 650 MB, DVD-Ram
Has a 5.2 GB storage device and a new magneto-optical disk with 17 GB memory has been announced. ), In the near future, the new mass storage disk will replace the traditional dynamic storage device known as the floppy disk (FD), which has a very small storage capacity (only 1.44 megabytes). Would.

[0006] Thus, mass storage disks will play a role similar to FDs. The mass storage disk is used particularly for recording and storage of computer files, and is very convenient for storing data of a specific item individually taken out of a hard disk built in the computer and storing the processed data; Mass storage disks will provide a low cost backup storage device. Further, in many cases, such a storage device is effective from the viewpoint of protection of personal information and data assurance. In that sense, such new flexible storage devices, especially inexpensive CD-Rs and somewhat more expensive DC-RWs,
It has already established a solid presence base in the PC market. In addition, manufacturers
Aiming at the realization of universal drives that can accommodate all disk types, such new flexible storage devices will be convenient and commonly used.

In the case of a disc such as a CD-Rom in which data is already recorded, the disc describing the recorded data content is printed on a plastic disc and sold. All such discs use one side to read and write data with a laser beam and cannot be marked externally to block the laser beam, but do not use it to access data. On the other side, print processing is therefore possible.

[0008] As a common sense, in the case of a disc on which data is recorded on a PC, such as the above-described device, the mark is naturally marked so that the user can visually confirm the data content stored on the disc. King processing should be done.

In the present situation, there are three methods of marking a content stored on a disc, such as a pen, a label, and a printer, when performing marking processing on the disc. Among them, the handwriting processing is clearly not the best in appearance. The glued label can be printed separately, and the separately printed label can be affixed to a plastic disc. This is almost any PC
But since it's connected to a printer, it can be run almost anywhere. However, the label is not so preferable because if it is peeled off, the delicate recording device may be damaged. One reason for strongly opposing the use of labels is that CDs are spinning at very high speeds, requiring very high precision during the read / write process. If the disc is not properly attached and the disc is slightly unbalanced, the read / write processing will be hindered. Therefore, the best method is to print directly on a disk, but the problem is whether printing on a disk can be performed easily and at a reasonable price.

At present, several manufacturers offer stand-alone printers that can print directly to a disk. Fargo Elector in Minnesota
onics sells the Signature, an inkjet CD printer. A similar product (Superimage's Media Prin
ter, Affex's Multimedia printer) are also on sale from two other American manufacturers. As another inkjet printer, Opal7 is marketed by a Japanese company, Chugai-Boyeki. These products, which are essentially modifications of the standard inkjet printer, sell for $ 800- $ 2,000. A monochrome thermal transfer printer from Rimage (USA) is relatively expensive (about $ 3000).

According to the present invention, in particular, a cheaper, simpler, and smaller ink jet printing mechanism for printing marks (letters, characters, graphics) directly on a disk.
ism).

Since the print processing mechanism of the present invention is designed as described above, it is not only used as a stand-alone printer but also occupied by a standard CD drive of a PC, like the other products described above. It can be used by incorporating it in the space where it is made.

Furthermore, unlike stand-alone printers, which need to have their own motor and drive for moving the printhead in the X-Y direction above the disk, the present invention simplifies assembly and reduces cost. For this purpose, some parts inherent in the disk drive processing mechanism are used as a part of the drive of the print processing mechanism.

[0014] printing apparatus for printing desired information on a digital disk disclosed according to the invention of the invention has an ink jet print head, the ink jet print head includes a linear moving mechanism for moving along said ink jet print head in the radial axis A surface on which the read / write processing of the disk is performed by the laser means, or a surface opposite to the surface on which the read / write processing of the disk is intended to be performed, and a mechanism for rotating the disk; Is provided.

The printing device may be incorporated in a space occupied by a standard CD-RW or CD-R. At least a part of the linear moving mechanism is a part of a mechanism for driving the laser head in the read / write processing, and / or a mechanism for rotating the disk drives the disk in the read / write processing. Desirably part of the mechanism.

In one embodiment of the present invention, the ink-jet printhead has a plurality of nozzles and a plurality of ink containers, and is slidably mounted on a slide rod, and is a detachably mounted replacement. Configure possible cartridges.

The present invention further comprises a printing method for printing desired information on a digital disk using an inkjet printhead, wherein the inkjet printhead is read from and written to the disk by laser means. Placed on the surface of the disk opposite to the surface on which the process is performed, or the surface on which the read / write process of the disk is performed, and while the inkjet printhead is transposed linearly along the radial axis, ,
While the disk is rotating, the inkjet print head is driven to eject ink droplets onto the disk.

Prior to the printing of the desired information, at least one coordinate point is printed on the disk to determine the sector coordinates of the inkjet printhead during the printing of the desired information. Preferably, the one or more coordinate points are printed on the inner or outer boundary of the annular configuration of the disk.

[0019] mentioned the best mode for carrying out the invention, also other, features and advantages of the present invention, described below with reference to FIG, embodiment of the invention, an illustrative The non-limiting detailed description can be further understood.

The drive mechanism of the disc is configured such that its read / write laser element can move with respect to a spiral mode disc in a CD-ROM or a concentric disc in a writable device. ing. The arrangement is based on a rotation (circular) movement.
This is achieved by two related movements: t) and linear movement. These movements allow the read / write element of the laser to access any point on the disk surface under software control. Further, with this arrangement, this access operation can be performed instantaneously. FIG. 1 is a schematic diagram of a drive mechanism of a disk having two motors and one laser read / write head. A disk surface (disc data surface) 1 used for accessing data is scanned by a laser head 5. In the laser head 5 described above, the disk is a rotary motor (r
During rotation by the motor 2, a linear stepping motor 3 drives a radial axis on a sliding rod 4.
move linearly along s).

FIG. 2 is a diagram showing a disk surface used for a printing process, which is opposite to the disk surface 1 described above. The ink jet print head 6 includes a plurality of nozzles 7 arranged in a line on a radial axis. The ink jet head 6
The slide rod 8 driven by the linear step motor 9 moves along the radial axis.

The two kinds of operations of the read / write processing and the print processing are executed separately,
It does not happen at the same time. However, during the execution of the printing process, any specific reading process is performed by the laser head in order to supply predetermined data for any spatial coordinates of the disk. The laser head reads track data that provides section information while remaining stationary at a predetermined known point along the radius of the disk.

The circular movement of the disk at a fixed speed is such that the dc continuously rotates at a constant speed.
It is performed by a continuous dc motor or by a dc motor that rotates continuously at a speed related to its angular position and at a speed that is the inherent part of the CD drive. You. In the data read mode and the data write mode, this rotational movement enables the laser head to access all the sectors of the disk. The use of similar movements and similar motors allows the printhead 6 to access all sectors of the printable side of the disk. In the data read / write mode, linear movement is achieved by a high precision stepper motor that performs a radial movement of the disk that allows the laser head to be positioned anywhere at a point along the radius of the disk. Thus, the combination of the two movements allows the laser head to access any point on the disk surface.

Spatial positioning of the laser head
g) is a coding mechanism (en) that feeds back the linear position of the laser head.
It can be controlled precisely by using coding mechanism and by feedback from track data embedded in the disc, which supplies sector information.

The mechanical precision required of a laser beam is very high, measured in sub-micron units in both rotational and linear directions.

In the present invention, another substantially similar linear moving mechanism is additionally used. However, this additional mechanism is arranged on the disk surface opposite to the laser head. The data side disk surface used by the laser source is usually the lower side of the data. The opposite, printable disk surface is the upper side of the disk. Such an arrangement is advantageous for the droplet dropping process of the ink jet mechanism of the present invention. In the ink jet mechanism of the present invention, in order to discharge a droplet of ink and put it on the substrate, it is desirable to drop the ink droplet downward from above, and the ink jet nozzle is disposed above the substrate, and the ink jet nozzle is disposed above the substrate. It is desirable that the droplet is discharged and dropped vertically toward the substrate. By doing so, the ejection speed of the droplet, i.e., the parameters required to accurately position the droplet on the substrate, is increased.

FIG. 3 is a diagram showing a nozzle row 10 including a plurality of nozzles, and an inkjet head 6 having a plurality of ink containers 11 arranged on both sides of the nozzle row 10. The nozzle row 10 may be a case where each row has one nozzle. Further, the ink jet head is provided with a flash (flat) to which the optical sensor 12 is attached.
sh). In order to increase the accuracy of drop placement, in the first embodiment of the present invention, all of the plurality of nozzles are arranged in a line along the radius of the disk. With such an arrangement, the distance between neighboring nozzles is known, and the positioning of all of the plurality of nozzles arranged along the radius of the disk is also accurately known from the encoding mechanism incorporated in the linear moving mechanism. During the printing process, the sector information is known from the track data read by the stationary laser beam, and the time it takes for the droplet to reach the disk surface is determined by the drop velocity and the distance of the nozzle from the substrate. Therefore, the calculation of the discharge time of the droplet becomes easy, and the droplet can be accurately positioned on the substrate. Since the track is configured as a single continuous spiral, or as a plurality of rings with coax, additional information is needed to accurately determine the sector coordinates on the disk. Such additional information is first printed on at least one coordinate point to be coded, either on the outer circumference or on the inner circumference of the annular disc, and the coordinates of the coordinates are printed. Obtaining a point by reading with an optical sensor attached to the inner or outer end of the inkjet printhead, such that the nozzles are centered on the radial axis, as are the nozzles. Can be. When one or more coordinate points are detected, the track data is counted and calculated.

FIG. 4 shows that, as a possibility of marking, when a mark is applied to one place (single marker), marks are applied in four directions on the circumference in the compass direction of a compass (4).
In the case of mark compass, a plurality of marks are provided in a ring shape (ring).
of markers) case. As such, by detecting the printed coordinate (s) along with the track data, at any time during the rotation of the disc, the spatial position of any nozzle relative to the printed surface is accurately determined. Can be.

There are two necessary conditions for performing this processing. First, the coordinate point (s) must be printed on a new disk prior to other printing operations. Next, the optical sensor that detects the coordinate point (s) must be placed stationary on the radial axis along the circumferential line on which the coordinate points are printed. All such data is used to accurately calculate when to eject a droplet so that the droplet reaches a predetermined point on the rotating substrate.

In order to explain the dripping situation in the ink jet mechanism of the present invention, reference will be made to actual typical parameters. The maximum distance between the nozzle and the substrate is 1 millimeter, and the typical drop speed is 6 meters per second. That is, the time from when the droplet starts dropping to when it reaches the surface is 1/6000 second or 0.15 microseconds. If one drop is positioned for high quality printing of one drop of 600 dpi dots having a diameter of 43 microns, the deviation of the drop is 5-1.
It must not exceed 0 microns. The radial position when positioning is guaranteed by the linear step motor, but positioning in the sector,
Based on whether the rotational movement can be accurately detected. The sector information is a plurality of data bits 1 micron wide and 3 microns long along the tracks (such bits are located in multiple physical holes or holes) located along the spiral tracks of the disk. physical bits and through, or a plurality of optically modified points). Based on the case where the deviation of the droplet is 10 microns, for rotational movement, the margin error of the droplet positioning timing is 3 times the accuracy of the sector track data.
It is twice. In this way, the track data can be read more accurately than the precision required to minimize the positioning error.

Other factors that can cause errors include delays in reading, transmitting, or processing track data. However, it is possible to control the rotation speed, and it is possible to calculate the maximum speed in the allowable range and stop the occurrence of an error exceeding the allowable range. As an extreme case, in this embodiment, the case where the rotation speed of the disk at the time of discharging the droplet is zero or more than zero is taken. The case where the rotation speed is zero is defined as a stop and go mode, that is, when the disk is rotated and the sector is correctly aligned, the rotation of the disk is stopped and droplets are ejected. Is the case. However, since this extreme case is not expected, any speed that enables efficient rotation for high-speed print processing may be used.

As noted above, the present invention, among other objects, is primarily directed to incorporating the inkjet printhead into a standard CD drive mechanism. In such a standard CD drive, the space provided above the disc is very small. Therefore, the inkjet mechanism is flat and very low (low).
profile).

[0033] In another embodiment, the inkjet mechanism is an Israeli Sci.
Similar to those made by tex Corporation. The mechanical device of the ink jet mechanism of this embodiment is formed as a thin wafer having a thickness of 1.8 mm, a plurality of nozzles occupy the bottom surface of the wafer, and the top surface of the wafer is a piezo element. Is occupied. The width and length of the wafer are determined by the number of nozzles used. In this ink jet mechanism, since the distance between the nozzles is 2.3 mm, the width of the wafer is required to be 3 mm for one row having a plurality of nozzles (there may be one nozzle in each row). For a row with eight nozzles, the length of the wafer would need to be 20 mm. As such, the inkjet mechanism is very small, so it can be installed in a space very close to the space allowed by a standard CD drive, and the inkjet mechanism moves along the radius of the disk. It is also possible. However, the present invention is not limited to the Scitex ink jet head mechanism, and can be similarly configured by employing other ink jet mechanisms.

In another embodiment, the bar-shaped mechanism is
A small ink container having the same thickness and length as the bar is mounted on each side of the mechanism. The ink jet mechanism and the ink container are sealed and integrated, and its length and width meet the space limitations and the requirements of ink capacity, and are easy to use and practical, 3 mm thick wafer-shaped ink jet. It is molded into a cartridge.

The advantage of the arrangement of the ink jet mechanism is not only that it can be adapted to a very small space, but also that the ink jet head and the ink supply portion constitute a thin cartridge in the form of a completed wafer. There is also.

For example, in the case of a Scitex apparatus having eight nozzles, the printing capacity is 0.15 ml of ink capacity (each of 6 × 6 cm areas of 50 discs at a black density of 10% like a conventional text). The surface of the wafer has a total of 20 × 40 mm and a 2 mm deep ink container.

These numbers indicate that such an ink jet cartridge is sufficient for printing on a disc at many user sites. For users who require frequent printing or print graphics that use a large amount of ink, such as grayscale or halftone, the present invention provides a cartridge replacement solution.

In this embodiment, the cartridge described above is configured to hold the cartridge along a slide rod, much like a laser element is held along a slide rod in a CD drive. Is held in the holder. Since the opening is provided on the upper front surface of the CD drive case, the cartridge can be inserted or pulled out. As described above, when the ink becomes insufficient during use of the cartridge, the cartridge is pulled out, and a new cartridge is inserted and installed. FIG. 5 shows this arrangement. However, the invention is not limited to cartridges as thin as wafers. If there is room in the CD drive, other configurations are conceivable, including a configuration in which an independent ink supply is connected to the inkjet head by a flexible tube.

When performing the printing process on a circular substrate, there is a problem that does not occur when the printing process is performed on a rectangular substrate used in almost all office printers and PC printers. It is simply a problem that there is no orienting coordinates. If the print process is performed only once, a reader (rea) should be provided so that the printed text can be read.
Since der) determines the direction of the disk, there is no problem. However, the present invention
Since the purpose is to enable more than one print process, the present invention also provides a solution and a solution therefor. For those who are familiar with the data storage operation, it should be known that the print processing of the content is repeatedly executed, and the occurrence of the print processing varies in time. For example, each time a file is written to a disc, the user will print the file name on the disc.

Therefore, according to the present invention, whenever a new disc is used, first, an orientation coordinator is attached to the new disc.
es) is provided with software means for printing. These orientation coordinates are preferably printed along the outer or inner circumference of an annular boundary on the surface of the disc to be printed (the disc has a hole in the center). The orientation coordinates are then determined by the photo-sensitive element of a light sensor attached to the end of the holder of the inkjet cartridge.
element). Small photosensitive elements with emitters and sensors are available from HP, Motorola and many other manufacturers, some of which are fairly small for use.

Prior to the subsequent printing process, the disc is rotated and the cartridge holder is moved stepwise along the radius, scanning the orientation marks as well as all other already printed information. Next, the scanned information is displayed on a computer screen. In addition, the user types new information into the computer and selects fonts, sizes, and print processing locations as deemed appropriate. The software program displays the appearance desired by the user. When the displayed appearance is confirmed, it is processed by software and sent to the print processing mechanism under position control derived from linear motion encoder and track decoder information.

Those skilled in the art will know that creating such software is part of a routine. Also, since such a technician scans the entire surface of the disc by the means provided by the present invention, the subsequent printing process displays not only the coordinates but also all the information printed before that. You will see that it is possible. Such a display could tell the user where to put the new information, avoid overprinting, or print the printed information by overlaying lines and other graphics on top of the information already printed. Provide tools to eliminate

[Brief description of the drawings]

FIG. 1 is a schematic structural diagram showing a print processing mechanism having two motors and a laser read / write head according to one embodiment of the present invention.

FIG. 2 shows a diagram of FIG. 1 used in a printing process according to one embodiment of the present invention.
FIG. 4 is a diagram showing the surface of the disk opposite to the disk surface shown by.

FIG. 3 is a diagram illustrating an inkjet head having a plurality of nozzles arranged in a line and a plurality of ink containers installed on the same surface according to an embodiment of the present invention.

FIG. 4 shows a single marker, a 4-mark compass, and a ring according to one embodiment of the present invention.
FIG. 4 is a diagram showing types of markings applicable to the present invention, such as of markers.

FIG. 5 is a schematic view showing an arrangement for pulling out an empty cartridge and inserting a new cartridge.

[Procedural Amendment] Submission of translation of Article 34 Amendment of the Patent Cooperation Treaty

[Submission date] February 12, 2001 (2001.1.22)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

──────────────────────────────────────────────────続 き Continuation of front page (81) Designated country EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE ), OA (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG), AP (GH, GM, KE, LS, MW, SD, SL, SZ, TZ, UG, ZW), EA (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), AE, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CR, CU, CZ, DE, DK, DM, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID , IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZWF terms (Reference) 2C056 EB36 FA04 FA09 FB01 HA38 KC01 2C062 RA01 5D121 AA03 JJ05 [Continued from the abstract] Multiple ink containers may be arranged on the surface.

Claims (21)

[Claims] 1. A printing apparatus having an inkjet printhead for printing desired information on a digital disk, comprising: a linear moving mechanism for moving the inkjet printhead along a radial axis; A printing apparatus provided with a mechanism for rotating the disk, the surface being installed on a surface opposite to a surface on which processing is performed or a surface intended to execute the read / write processing of the disk. 2. The disk according to claim 1, wherein a surface of the disk opposite to a surface on which read / write processing is performed or a surface for performing read / write processing by laser means is an upper part of the disk. The printing apparatus according to claim 1, wherein 3. The ink-jet printhead as claimed in claim 1, wherein the ink-jet printhead is mounted on an upper portion of the disk so that ink droplets are ejected vertically onto a surface of the disk. The printing device according to the above. 4. The printing apparatus according to claim 1, wherein the ink jet print head includes a nozzle row in which one or more nozzles are arranged on a radial axis of the disk. 5. The printing apparatus according to claim 4, wherein the ink jet print head further comprises a plurality of ink containers arranged on both sides of the nozzle row. 6. The printing apparatus according to claim 4, wherein said ink jet print head further comprises an optical sensor. 7. The printing device according to claim 1, wherein the printing device is incorporated in a space occupied by a standard CD drive. 8. A mechanism for driving the laser head in the read / write processing, and / or a mechanism for rotating the disk in the read / write processing. 2. A printing apparatus according to claim 1, wherein said printing apparatus is a part of a mechanism for driving said disk. 9. The printing apparatus according to claim 1, wherein the mechanism for driving the inkjet print head along a radial axis includes a step motor having high precision. 10. The printing apparatus according to claim 1, wherein the mechanism for rotating the disk includes a DC motor. 11. The printing apparatus according to claim 1, wherein said linear moving mechanism includes a coding mechanism for monitoring a radial position of said ink jet head. 12. The ink-jet printhead according to claim 1, wherein the ink-jet printhead is formed as a thin wafer, the plurality of nozzles are arranged on a bottom surface of the wafer, and a plurality of piezo elements are arranged on an upper surface. Printing equipment. 13. The ink-jet printhead having the plurality of nozzles and the plurality of ink containers, wherein the ink-jet printhead constitutes a replaceable cartridge that is slidably and removably mounted on a slide rod. The printing apparatus according to claim 1. 14. The printing apparatus may further include online data from the track read by the read / write laser head and encoded data from the linear moving mechanism to enable precise printing. The printing apparatus according to claim 1, further comprising computer means for analyzing data. 15. The printing apparatus according to claim 1, further comprising computer means for programming a subsequent printing process at a designated position on said disc. 16. A method for printing desired information on a digital disk using an ink jet print head, comprising the steps of: writing the ink jet print head to a surface on which read / write processing of the disk is performed by laser means; When the inkjet print head is placed on the disk surface opposite to the surface on which the read / write processing is intended to be performed, and the inkjet print head is transposed linearly along the radial axis, and when the disk is rotating, A printing method, wherein the inkjet print head is driven to discharge ink droplets onto the disk. 17. The method of printing, further comprising, prior to the printing of the desired information, determining at least one coordinate point for determining sector coordinates of the inkjet printhead during the printing of the desired information. 17. The printing method according to claim 16, wherein printing is performed on the disk. 18. The disk according to claim 18, wherein the disk has an annular configuration, and one or more of the coordinate points are printed on an inner or outer boundary of the annular configuration of the disk. 17. The printing method according to item 17. 19. The one or more coordinate points and the other information already printed on the disk are scanned prior to the print processing of the desired information, and the desired information and the scan are scanned. 18. The method according to claim 17, further comprising: defining a positional relationship of the desired information with respect to the obtained information, thereby controlling an operation of the inkjet print head, a linear transposition of the inkjet print head, and a rotation of the disk. The printing method described. 20. The scanned information is displayed on a computer screen, the desired information is typed in, the position and appearance is determined as desired, and the display results are processed to generate a program. 20. The printing method according to claim 19, wherein the program is used to control the operation of the inkjet printhead, the linear transposition of the inkjet printhead, and the rotation of the disk. 21. The print processing is controlled by analyzing the online data read from the track by the read / write laser head and coded data from the linear moving mechanism. Item 16. The printing method according to Item 15.