JP3383771B2 - Disk recording device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DVD (Digital
The present invention relates to a disk recording device that records information on a disk such as a Versatile Disk, and more particularly, to a disk recording device that allows character data relating to recorded information to be viewed on the disk. 2. Description of the Related Art In recent years, many recording / reproducing apparatuses using media such as video discs have appeared, and their application range is wide. As a result, the management of recorded disks has become very complicated. [0003] For example, Japanese Utility Model Laid-Open Publication No. 5-73713 proposes a recording apparatus for a write-once optical disc which saves the trouble of recording the recorded contents and allows the recorded contents to be checked at a glance. As shown in FIG. 5, a writing device 4a for writing digitized image information on a recording surface 5a of an optical disk 5 using a thermal effect of a laser beam,
An optical pickup 4b for detecting recording information recorded on a recording surface 5a of an optical disk 5, and a color paper 6 on which the image information and the recording information are reproduced by a printer
And a paper sticking device 4c for sticking the label on the display surface 5b of the optical disk 5. According to this, the display surface 5b of the optical disk 5
, The image recorded on the recording surface 5a and the remaining capacity can be known, and the image information is additionally recorded on the recording surface 5a of the optical disk 5 while checking the recorded image and the remaining capacity. It becomes possible. Further, the publication discloses that as a method of displaying the number of recorded sheets or the number of remaining sheets, a method may be used in which a heat-sensitive material is applied on the surface in advance and the recorded area is painted black. . [0007] However, the printer disclosed in Japanese Utility Model Laid-Open No. 5-73713 described above reproduces image information and recorded information on a color paper 6 and a color paper. Paper sticker 4 for sticking 6 to display surface 5b of optical disk 5
Since c is necessary, there is a problem that the configuration is complicated and the size of the apparatus is increased. Further, in a method of displaying the number of recordings or the remaining number of sheets by coating a heat-sensitive material on the surface in advance and painting out the recorded portions in black, character data relating to recording information cannot be written. However, there is a problem that the contents of the record information cannot be checked at a glance. SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to provide a disk recording apparatus capable of writing character data relating to recording information on a disk with a simple configuration. And [0010] Means for Solving the Problems A disc recording apparatus according to the present gun onset Ming, by the optical pickup, the information recording area of the disc, the disc recording apparatus for recording information, the information of the disc A heat-sensitive rewritable material is provided in a portion other than the recording area, and character data writing means for writing character data relating to information recorded in the information recording area of the disc to the heat-sensitive rewritable material using the optical pickup is provided. It is a thing. [0011] Thus, it is possible to write character data relating to the recorded information to a heat-sensitive rewritable material provided on the disk by using an optical pickup for recording information in an information recording area of the disk. Since it is possible, with a very simple configuration, it is possible to record character data relating to recording information on a disk, visually check the recorded contents of the disk, and facilitate handling of the disk. [0012] The disk recording apparatus according to the present gun onset Ming,
The portion provided with the thermal rewritable material before SL disk,
The character data comprising a land groove having a pitch wider than a land groove for tracking guide in an information recording area of the disk, and a control means for variably controlling a spot diameter of a laser beam of an optical pickup in the character data writing means. The writing means is provided with control means for variably controlling the spot diameter of the laser beam of the optical pickup. This makes it possible to control the rotation of the disk at the time of writing the character data by using the servo system used at the time of normal information recording, and to control the laser of the optical pickup at the time of writing the character data. Since the spot diameter of the light is variable, it is possible to record character data of a size that can be visually recognized in a short time. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a disk recording apparatus according to the present invention will be described below with reference to FIGS. Here, FIG. 1 is a block diagram showing a disk recording device of the present embodiment, FIG. 2 is an enlarged view of a main part showing an optical pickup peripheral portion in the disk recording device of the present embodiment, and FIG. 3 is a disk recording device of the present embodiment. OSD of display in
FIG. 4 is an explanatory diagram showing a display example, and FIG. 4 is an explanatory diagram showing an example of a non-recording area in which visible characters are written in the disk recording device of the present embodiment. In FIG. 1, reference numeral 10 denotes a disk on which digital data is written / recorded / read / reproduced, and a heat-sensitive rewritable material is provided in a non-recording area on an inner peripheral portion or an outer peripheral portion other than a normal information recording area. . Reference numeral 11 denotes a spindle motor that is directly connected to the disk 10 and drives the disk 10 to rotate. Reference numeral 12 denotes a spin motor driver that controls driving of the spindle motor 11 in accordance with a control signal from a servo circuit 13. Reference numeral 14 denotes an optical pickup having a laser diode for writing / recording / reading / reading data to / from the disk 10, reference numeral 15 denotes a thread motor for driving the optical pickup 14 from the inner periphery to outer periphery of the disk 10, and 16 denotes a servo. A pick control unit 17 performs tracking control of a small area of the optical pickup 11 in accordance with a control signal from the circuit 13. A pick control unit 17 performs tracking control of the optical pickup 11 when exceeding the small area. ,
This is a thread motor driver that controls the drive of the thread motor 15. Reference numeral 18 denotes an A / A for processing input video and audio signals.
A V input processing circuit 19 is a Moving Picture Experts Group (MPEG) for compressing input video and audio signals. A
/ V encoder, 20 is a predetermined program stream conforming to the disc format, a program stream / ECC adding circuit for adding ECC, 21 is a changeover switch for switching an input signal, and 22 is a disc which converts an output signal from the changeover switch 21 into digital data as digital data. Is a driver power control unit that optimally controls the power for driving the optical pickup 14 so that the data is recorded on the optical pickup 14. Reference numeral 23 denotes an RF. 23 for amplifying the reflected signal read by the optical pickup 14. AMP EQ circuit, 24
Is an ECC circuit, 25 is an MPEG. An A / V decoder 26 is an A / V for outputting reproduced video and audio signals to the outside.
An output processing circuit. Note that RF. AMP EQ circuit 23
Signals necessary for tracking control etc.
Output to Reference numeral 27 denotes a key input unit, and 28 denotes a key input unit 27.
Control of the changeover switch 21 based on the command from the
This is a system controller that controls the switching of the power and reads out character or numeric data stored in a character generator 29 composed of a ROM (read only memory). An OSD (On Screen Display) controller 30 controls mixing of character and numeric data from the character generator 29 to A / V output.
Is a visual information conversion unit for converting character and numeric data from the character generator 29 into visual information for writing on the disk 10 so as to be visible. In the above configuration, as the heat-sensitive rewritable material provided in the non-recording area of the disk 10, a generally known color developing / erasing type leuco dye such as a TC film manufactured by Ricoh Company, Ltd. may be used. Can be used. This utilizes a phenomenon in which a leuco dye and a reversible color developing material are mixed into a polyester film or the like, and the molecular arrangement of both is changed by heating and quenching to change between a transparent state and a colored state. In the non-recording area provided with the heat-sensitive rewritable material, the pitch of the tracking guide land groove (0.6 micron) in the normal information recording area shown in FIG. As shown in FIG. 2B, land grooves having a wide pitch are formed. Further, the optical pickup 14 and the disc 1
In accordance with a control signal from the system controller 28, a lens 32 movably provided is interposed between 0 and 0. By changing the position of the lens 32, it is possible to match the pitch of the land groove described above. In addition, the configuration is such that the spot diameter of the laser beam of the optical pickup 14 can be changed. The operation of the disk recording apparatus configured as described above will be described. First, in the case of normal information recording,
The video and audio signals input via the A / V input processing circuit 18 are MPEG. The signal is input to the driver power control unit 21 via the A / V encoder 19, the program stream / ECC addition circuit 20, and the terminal a of the changeover switch 21. The driver power control unit 21 controls the power applied to the optical pickup 14, and the input video and audio signals are recorded in the information recording area of the disk 10 by the optical pickup 14 in an optimum state. At this time,
The lens 32 is moving toward the optical pickup 14 as shown in FIG. 2A, and the laser beam of the optical pickup 14 has a spot diameter corresponding to the land groove pitch in the information recording area. Next, when writing the character data relating to the recording information to the heat-sensitive rewritable material on the disk 10, when the key input unit 27 instructs the writing of the character data,
The servo circuit 13 controls the thread motor driver 17 so that the optical pickup 14 is located at a position facing the heat-sensitive rewritable material. The system controller 28 switches the changeover switch 21 from the terminal a to the terminal b and switches the driver power control unit 21 to increase the power for driving the optical pickup 14. Further, as shown in FIG. 2B, the lens 32 is moved toward the disk 10 so that the laser beam of the optical pickup 14 is controlled to have a spot diameter corresponding to the land groove pitch in the non-recording area. . Then, an arbitrary character is selected from the key input section 27, and desired character and numeric data are read out from the character generator 29. Character generator 2
The character and numeric data from 9 are stored in the OSD controller 30
A / V output processing circuit 26 uses MPEG. The signal is combined with the signal from the A / V decoder 25 and displayed on an external display such as a TV receiver as shown in FIG. 3, for example. The character and numeric data from the character generator 29 are converted by the visual information conversion unit 31 as shown in FIG.
After being converted into pulsed visual information which can be written on the heat-sensitive rewritable material on the disk 10 as shown in FIG. 1A, the information is input to the driver power control unit 21 via the terminal b of the changeover switch 21. The driver power control unit 21 controls the optical pickup 14 so that a stronger power is applied to the optical pickup 14 than during normal information recording. That is, a strong power is applied to the optical pickup 14 so that a temperature necessary for writing visual information on the thermosensitive rewritable material on the disk 10 is obtained. At this time, the lens 32 is moving toward the disk 10 as shown in FIG.
The laser light of No. 4 has a spot diameter corresponding to the pitch of the land groove in the non-recording area. Here, the spin motor driver 12, the pick control unit 16, and the sled motor driver 17 perform tracking control in accordance with the land groove in the non-recording area of the disk 1.
As shown in (b), characters that can be visually observed accurately can be written on the thermosensitive rewritable material. As described above, in the disk recording apparatus according to the present embodiment, the optical pickup 14 for performing normal information recording and the servo system are used to convert visible characters related to the recorded information into the heat-sensitive rewritable material. Since writing is possible, the disk 1 has a very simple configuration.
It is possible to check the recorded contents of 0 visually to facilitate handling of the disk 10. Also, since the pitch of the land groove in the non-recording area is widened and the spot diameter of the laser beam of the optical pickup 14 is largely changed according to this pitch, it is possible to write visual information with large dots. Thus, visual information can be written in a short time. In the above-described embodiment, the character data is written into the heat-sensitive rewritable material in accordance with an instruction from the key input section 27. However, when the normal information recording is completed and the disk 10 is taken out, or While the recording is temporarily stopped, predetermined character data may be automatically written to the heat-sensitive rewritable material. That is, in general, this type of apparatus holds the current date and time data, and the current date and time can be displayed on the external display as appropriate by OSD. When the disc 10 is taken out, or while recording is temporarily stopped, the character and numeric data corresponding to the current date and time are read out from the character generator 29 and written on the heat-sensitive rewritable material by the optical pickup 14. It is possible to visually confirm the recording date and time. In addition to the characters and numeric data read from the character generator 29, characters and the like included in the recorded information are automatically extracted and written into the thermosensitive rewritable material as visible information. good. Further, in the above embodiment, one lens 32 is provided so as to be movable in order to change the spot diameter of the laser beam of the optical pickup 14.
Obviously, the spot diameter may be changed using a bifocal lens. Since the disk recording apparatus according to the first aspect of the present invention has the above-described configuration, an optical pickup for recording information in the information recording area of the disk. Utilizing, it is possible to write the character data relating to the recorded information on the heat-sensitive rewritable material provided on the disk, so with a very simple configuration, record the character data relating to the recording information on the disk, It is possible to visually check the recorded contents of the above to facilitate handling of the disk. Further disk recording apparatus according to the invention described in the claims 1, by using the servo system used for normal information recording, it is possible to control the rotation of the disk for writing character data, Further, when writing the character data, the spot diameter of the laser beam of the optical pickup is changed, so that it is possible to record the character data of a visually recognizable size in a short time.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a disk recording device according to the present invention. FIG. 2 is an enlarged view of a main part showing a portion around an optical pickup in an embodiment of the disk recording apparatus of the present invention. FIG. 3 is an explanatory diagram showing an example of an OSD display on a display in one embodiment of the disc recording device of the present invention. 4A and 4B are explanatory diagrams showing a relationship between laser light of visual information and a track of a non-recording area in an embodiment of the disk recording apparatus of the present invention, and FIG. It is explanatory drawing which shows an example. FIG. 5 is a block diagram showing a schematic configuration of a conventional disk recording device. [Description of Signs] 10 Disk 11 Spindle motor 12 Spin motor driver 13 Servo circuit 14 Optical pickup 15 Thread motor 16 Pick control unit 17 Thread motor driver 18 A / V input processing circuit 19 MPEG. A / V encoder 20 ECC / program stream addition circuit 21 Changeover switch 22 Driver power control unit 23 RF. AMP EQ circuit 24 Demodulation, ECC circuit 25 MPEG. A / V decoder 26 A / V output processing circuit 27 Key input unit 28 System controller 29 Character generator 30 OSD controller 31 Visual information conversion unit 32 Lens

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 23/38 G11B 7/00 G11B 7/24 561

Claims (1)

(57) [Claim 1] In a disc recording apparatus for recording information in an information recording area of a disc by an optical pickup, a thermo-sensitive type is applied to a portion other than the information recording area of the disc. A rewritable material is provided.Character data writing means for writing character data relating to information recorded in the information recording area of the disc to the thermosensitive rewritable material using the optical pickup is provided , and the thermosensitive rewritable material of the disc is provided . In the part provided,
Tracking guide in the information recording area of the disc
Land groove with a wider pitch than the land groove for
And the character data writing means is provided with an optical pickup laser.
A disk recording device provided with control means for variably controlling a spot diameter of laser light .