JP4453663B2 - Optical disk recording device - Google Patents

Description

  The present invention relates to an optical disk recording apparatus, and more particularly to an optical disk recording apparatus that records and deletes visible characters, symbols, and the like in a clamp area designated on the optical disk.

A non-recording area called a clamp area is provided in an inner peripheral area of an optical disk such as a DVD-RAM or DVD-RW in order to fix the optical disk by a clamp mechanism of an optical disk recording apparatus.
Since the installation surface of the clamp area is the reference surface of the optical disk with respect to the disk rotation unit provided in the drive device, if a label or the like indicating the content of the information recorded on the optical disk is attached, the surface vibration will occur when the optical disk is driven to rotate. Or the slippage of the optical disc with respect to the disc rotating part increases, making it difficult to normally record information recorded on the optical disc. It is not preferable to display the displayed information.

For this reason, conventionally, as described in Patent Document 1, a thermal recording material is formed on the inner surface of a clamp area of an optical disc, and the content of information recorded on the optical disc is displayed by heating the thermal recording material. It was.
FIG. 8 shows an outline of the optical disk recording apparatus described in Patent Document 1.

As shown in FIG. 8, the conventional optical disc recording apparatus 100 includes a clamp mechanism 101, an optical disc 102, a turntable 103, a print recording head 104, and an optical head 105.
The clamp mechanism 101 includes a locking claw storage portion 101a, an elastic body 101b, and a locking claw 101c.
The optical disk 102 includes a transparent substrate 102a, an information recording unit 102b, a thermal recording material 102c, and an adhesive material 102d.
The print recording head 104 includes a heating laser 104a and a condenser lens 104b.
The optical head 105 includes a recording laser 105a and a focusing lens 105b.

The clamp mechanism 101 fixes the optical disk 102 to the turntable 103 by an elastic body 101b and a locking claw 101c stored in a locking claw storage portion 101a attached on a rotating shaft attached to the turntable 103. To do.
In other words, when the optical disk 102 is inserted, when the optical disk 102 moves along the inclination of the locking claw 101c, it is pushed by the locking claw 101c and the elastic body 101b is contracted inward to the locking claw storage portion 101a to temporarily engage the locking claw 101c. When the optical disk 102 reaches the top of the turntable 103 via the opposite inclination after passing through the top of the inclination of the locking claw 101c, the elastic body 101b is stored in the locking claw. The optical disk 102 is fixed to the turntable 103 by moving the locking claw 101c on the optical disk 102 extending from the inside of the portion 101a.

In the optical disk 102, an information recording unit 102b and a thermal recording material 102c are installed on two transparent substrates 102a, respectively, and the adhesive 102d is then placed with the information recording unit 102b and the thermal recording material 102c installed next inside. To create one optical disk.
The print recording head 104 heats the thermal recording material 102 c to print characters / symbols to be displayed, and the optical head 105 records information in the information recording unit.

The turntable 103 is connected to a spindle motor, and rotates the optical disk 102 fixed on the turntable 103 by the rotation of the spindle motor.
The print recording head 104 emits laser light from the heating laser 104a, condenses and heats the laser light emitted from the condenser lens 104b on the surface of the thermal recording material 102c, and displays characters, symbols, and the like.
The optical head 105 emits laser light from the recording laser 105a during recording, and records information by focusing the laser light emitted from the focusing lens 105b on the information recording unit 102b surface of the optical disc 102. The optical head 105 also reproduces recorded information by irradiating a portion of the optical recording medium 102 where information on the information recording unit 102b surface is recorded with laser light to reflect it and generating a light reception signal using the reflected light. I do.

Next, the operation of the optical disc recording apparatus 100 will be described.
First, when the center hole on one surface side of the optical disk 102 is inserted from the clamp mechanism 101 side toward the turntable 103, the optical disk 102 moves along the initial inclination of the locking claw 101c of the clamp mechanism 101. The claw 101c is pushed and moves in the storage portion 101a, and when the optical disk 102 is further moved, the claw 101c passes through the tip of the locking claw 101c and this time along the next inclination of the locking claw 101c, the inside of the storage portion 101a. When the optical disk 102 returns to the original position from the direction and the optical disk 102 reaches the turntable 103, the locking claw 101 c moves onto the other surface of the optical disk 102 to fix the optical disk 102 to the turntable 103.

Then, the print recording head 104 is moved to the position of the surface of the thermal recording material 102c of the optical disk 102 fixed to the turntable 103, the laser beam is emitted from the heating laser 104a, and condensed and heated on the surface of the thermal recording material 102c. And print characters and symbols.
When recording on the optical disk 102, the optical head 105 is moved to the surface of the information recording unit 102b opposite to the optical disk surface on which the print recording head 104 is installed to record information.

In this way, visible characters, symbols, and the like are recorded without attaching a label or the like to the clamp area designated on the optical disc.
JP 2001-184730 A

However, as shown in FIG. 8, the locking claw 101 c of the clamp mechanism 101 is positioned on the optical disk 102 when the optical disk 102 is fixed on the turntable 103, so that the thermal recording material 102 c in the clamp area is located. The laser beam emitted from the print recording head 104 is interrupted and part of the heat recording material 102c cannot be printed on the entire surface of the thermal recording material 102c.
Furthermore, in addition to the optical head 105, in order to print on the thermal recording material 102c in the clamp area, a print recording head 104 must be additionally installed, and the recording and printing are performed on both sides of the optical disk surface. Since the print recording head 104 and the optical head 105 are positioned, there has been a problem that the operation of attaching and detaching the optical disk is complicated and the shape of the optical disk recording apparatus is increased.

  Therefore, the present invention has been made to solve the above-described problems, the optical disk can be easily attached and detached, and printing can be performed in the clamp area of the optical disk without adding the print recording head 104. An object of the present invention is to provide a small-sized optical disk recording apparatus.

In order to solve the above-described problems, the present invention provides an optical disc recording apparatus having the configurations (a) to (c).
(A) In an optical disc recording apparatus that records data using a laser beam on an optical disc having a data area and a clamp area formed on the inner surface side of the data area on the same plane as the data area, the data area is recorded in the data area. A data recording unit having recording data to be recorded, a print data recording unit having printing data to be recorded in the clamp area, and generating a position signal based on the position where the laser beam is focused in the data area and the clamp area A driving unit that reads out the recording data from the data recording unit when the position signal indicates the data region, and a switching unit that reads out the printing data from the printing data recording unit when the position signal indicates the clamp region; When the position signal indicates the data area, the spot diameter of the laser beam is used as a recording spot diameter, When the position signal indicates the clamp area, a spot diameter adjusting unit for making the print data spot diameter larger than the recording spot diameter, and when the position signal indicates the data area, the optical disk is rotated at the recording rotational speed. A rotation control unit that rotates at a printing data rotation speed slower than the recording rotation speed when the position signal indicates the clamp area, and when recording the recording data in the data area, The laser beam is irradiated to the data area with the recording spot diameter based on the recording data read by the switching unit while rotating the optical disk at the recording rotational speed, and the print data is recorded in the clamp area. In this case, based on the print data read by the switching unit while rotating the optical disc at the rotation speed for the print data. Optical disk recording apparatus characterized by the spot diameter for the serial print data by irradiating the laser light to the clamp area.
(B) a light receiving unit that receives the laser beam irradiated on the optical disc, and forming a linear reference line toward the center of the optical disc in the clamp region with the laser beam, The optical disc recording apparatus according to (a), wherein when the reference line formed in the clamp area is detected, the switching unit reads the print data from the print data recording unit.
(C) a light receiving unit that receives the laser beam irradiated on the optical disc, and when the light receiving unit detects a reference line formed in the clamp area, the switching unit receives the print data from the print data recording unit. The optical disk recording apparatus according to (a), wherein

  According to the present invention, in an optical disk recording apparatus that records print data using a laser beam in a print area of an optical disk having a print area and a data area on the same surface, a data recording unit that records data in the data area; A print data recording section for recording print data in the print area, a switching section for selecting between the data recording section and the print data recording section by a signal supplied from the outside, and a spot diameter for adjusting the spot diameter of the laser beam When the adjustment unit, the rotation unit that rotates the optical disk, and the data recording unit are selected by the selection of the switching unit, the spot diameter adjustment unit sets the spot diameter of the laser beam to the recording spot diameter, When the rotation of the optical disk is controlled to be the number of rotations for recording in the rotating unit and the print data recording unit is selected, the laser is applied to the spot diameter adjusting unit. And a rotation control unit for setting the rotation part of the optical disk to a rotation speed slower than the rotation speed for recording. Can be printed, and the optical disk can be easily attached and detached, and can have a small shape.

Hereinafter, an optical disc recording apparatus according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a diagram showing the overall configuration of an optical disc recording apparatus according to an embodiment of the present invention.
2A and 2B are cross-sectional views of the optical disk recording apparatus according to the embodiment of the present invention. FIG. 2A is a diagram for explaining an operation of recording in the data recording unit, and FIG. It is a figure for demonstrating the operation | movement which performs printing in a part.
3A and 3B are diagrams illustrating a clamp mechanism of the optical disk recording apparatus according to the embodiment of the present invention, in which FIG. 3A is a diagram viewed from the upper surface, and FIG. (C) is a view showing a cross section viewed from the side surface after the optical disc is mounted.
4A and 4B are diagrams for explaining the structure of an optical disc used in the optical disc recording apparatus according to the embodiment of the present invention. FIG. 4A is a view from the top, and FIG. FIG.
FIG. 5 is a diagram for explaining characters / symbols, etc. printed on the optical disc, (A) is a diagram showing printed characters printed in the print area, and (B) is installed in the print area. It is a figure which shows a reference line.
FIG. 6 is a diagram showing spot diameters and reference lines of data recorded on the optical disc, (A) is a diagram showing spot diameters recorded in the data recording unit based on the data, and (B) is It is a figure which shows the reference line currently recorded on the print data recording part.
FIG. 7 is a diagram for explaining the spot diameter of characters recorded in the print data recording unit.

  As shown in FIG. 1, an optical disc recording apparatus 1 according to an embodiment of the present invention includes a data recording unit 2 (data recording unit), a print data recording unit 3, a print position control unit 4, a switching unit 5, and an optical unit. A head 6, an optical disk recording medium 7, a received light signal selection unit 8, a mark position detection unit 9, a reproduction data generation unit 10, a pickup position detection unit 11, a spot diameter adjustment unit 12, a rotation unit 13, The rotation control unit 14, the turntable 15, and the clamp mechanism 16 are configured.

The switching unit 5 is composed of SW1 having terminals a, b, and c.
The optical head 6 includes a laser light emitting unit 6a, a laser light receiving unit 6b, and a driving unit 6c.
As shown in FIG. 2, the optical disk recording medium 7 includes an information recording unit 7a, a thermal recording material 7b, a transparent substrate 7c, and an adhesive 7d.
As shown in FIG. 3, the clamp mechanism 16 includes a locking spring 16a-0 to a locking spring 16a-4 and a housing 16b.

The data recording unit 2 inputs and stores data of information generated by the data generation unit 17 such as an external personal computer or a digital camera, and the stored data is read according to the rotational speed recorded on the optical disc.
The print data recording unit 3 inputs and stores the print data generated by the data generation unit 17 such as an external personal computer or digital camera, and the stored print data is read in accordance with the rotation speed for printing on the optical disk.

The print position control unit 4 reads the print data stored in the print data storage unit based on the mark position signal generated according to the mark position on the reference line formed in advance on the print unit of the optical disc. Control.
The switching unit 5 detects the data to be recorded on the optical disk read from the data recording unit 2 or is read from the print data recording unit 3 by the switching signal generated by detecting the positions of the data area and the clamp area of the optical disk. To print data to be printed on the optical disk.

The optical head 6 emits a laser beam from the laser emission unit 6a based on data recorded on the optical disk supplied from the switching unit 5 or print data. When reproducing the data recorded on the optical disk, the laser light emitted from the laser light emitting unit 6a with a constant light amount is reflected by the data recording surface of the optical disk, and the reflected light reflected according to the data by the laser light receiving unit 6b is received. Then, a light reception signal is generated.
The drive unit 6 c controls the movement position of the pickup portion, which is the laser beam focal position of the optical head 6, and generates a pickup position signal indicating whether the pickup position is the data recording unit 2 or the print data recording unit 3. Further, the drive unit 6c controls the spot diameter of the laser light irradiated onto the optical disc by the spot diameter adjustment signal generated based on the pickup position signal, with respect to the focal position of the laser light.

As shown in FIG. 2, the optical disk recording medium 7 is mainly composed of a recording unit 7a for recording data and a printing unit 7b for printing characters / symbols. The recording unit 7a and the printing unit 7b are composed of two transparent sheets. By forming each on the substrate 7c and arranging the two transparent substrates 7c so as to be on the outside and bonding them together with an adhesive 7d, recording and printing on both sides is possible.
The recording unit 7a and the printing unit 7b may be erasable thermoreversible recording media and thermoreversible printing media. In addition, the printing position may be determined by forming a plurality of marks on the reference line in advance on the printing unit 7b.

The received light signal selection unit 8 selects whether the optical head is at the recording unit 7a or the printing unit 7b from the received light signal generated by the laser receiving unit. If the position of the recording unit 7a is selected, data is generated and printed. When the part 7b is selected, a mark signal indicating the mark position of the reference line is generated.
The mark position detection unit 9 generates a mark position signal indicating a printing start position when printing characters / symbols or the like on the optical disk from the mark signal generated by the received light signal selection unit 8, and the print position control unit 4 prints the print data. Is used for the timing of reading.

The reproduction data generation unit 10 arranges the data generated by the received light signal selection unit 8 into display data and sends it to the data display unit 18 installed outside for display.
The pickup position detection unit 11 generates a switching signal for switching between the recording unit 7 a and the printing unit 7 b from the pickup position signal generated by the optical head 6.
The spot diameter adjusting unit 12 generates a spot diameter adjusting signal for adjusting the spot diameter so as to be small at the position of the recording unit 7a and large at the printing unit 7b based on the switching signal generated by the pickup position detecting unit 11.

The rotating unit 13 includes a spindle motor or the like, and generates a driving force for rotating the optical disc 7.
The rotation control unit 14 causes the driving force for rotating the optical disc 7 generated by the rotation unit 13 to be faster at the position of the recording unit 7a and slower at the printing unit 7b based on the switching signal generated by the pickup position detection unit 11. A rotational driving force control signal to be controlled is generated.
The turntable 15 installs the optical disk 7 and rotates the optical disk by the driving force supplied from the rotating unit 13.

In the clamp mechanism 16, the housing 16b shown in FIG. 3A is fixed to the turntable 15, and the optical disk 7 is attached and detached by the locking springs 16a-0 to 16a-4. FIG. 3B is a cross-sectional view of the clamp mechanism 16 before the optical disc 7 is mounted, and the locking springs 16a-0 to 16a-4 maintain the state of the width t0.
FIG. 3C is a cross-sectional view of the clamp mechanism 16 when the optical disk 7 is mounted. The locking springs 16 a-0 to 16 a-4 have a width t 1 that is contracted along the clamp hole of the optical disk 7. The optical disk 7 is held on the turntable 15 fixed to the clamp mechanism 16 by the repulsive force generated when the contraction is performed.

The data generation unit 17 includes an information data generation device that generates data and print data such as information from a personal computer and a digital camera. The data generation unit 17 sends the generated data and print data to the optical disc recording device 1 to record or print on the optical disc 7. .
The data display unit 18 is composed of a CRT or liquid crystal display device, and displays data reproduced by the optical disc recording apparatus 1.

Next, the operation of recording data on the recording unit 7a of the optical disc recording medium 7 will be described.
First, as shown in FIG. 2A, the optical disk recording medium 7 is inserted from the clamp mechanism 16 side and fixed to the turntable 15, and then the optical disk recording medium 7 is moved via the turntable 15 by driving the rotating unit 13. Rotate at a predetermined rotation speed.
Then, the optical head 6 is moved to the recording position of the recording unit 7 a of the optical disk recording medium 7.
When the optical head 6 is positioned on the recording unit 7a, the pickup position signal of the drive unit 6c indicates the recording unit 7a, so that the switching signal generated by the pickup position detection unit 11 is also used for the recording unit 7a. A terminal a and a terminal b of SW1 of the switching unit 5 are connected by a switching signal, and the spot diameter adjusting unit 12 has a predetermined diameter for recording data on the recording unit 7a so that the spot diameter of the laser light emitted from the laser light emitting unit 6a is recorded. A spot diameter adjustment signal is generated so as to have a size diameter, and the rotation control unit 14 generates a rotation driving force control signal for rotating the optical disc recording medium 7 at a predetermined rotation speed.

  Then, the information data generated in the data generation unit 17 composed of an external personal computer or a digital camera is stored in the data recording unit 2 of the optical disk recording apparatus 1 and then stored in accordance with a predetermined rotation speed of the optical disk. Based on the switching signal generated by the pickup position detector 11, the laser a of the optical head 6 is connected from the terminal a and the terminal b of the SW1 of the switching unit 5 based on the switching signal. By adding the read data to the light emitting unit 6a, the laser beam having the recording energy based on the data read from the laser light emitting unit 6a is emitted, and the data is recorded on the recording unit 7a of the optical disc recording medium 7. .

In order to record data on the recording part 7a of the optical disc recording medium 7, the laser light emitting part 6a emits a laser beam having an intensity for recording so that the recording part has a temperature of about 600 ° C. The recording material 7a is changed from a crystalline layer to an amorphous layer. Since this non-crystalline layer does not reflect the laser beam for reproduction, it is used as a data recording portion.
Further, when the data recording portion is heated to 200 ° C. and then slowly cooled, the data recording portion is erased again from the non-crystalline layer to the crystalline layer.
In this manner, data in the recording unit is recorded and erased.

The data recorded in the recording unit 7a of the optical disc recording medium 7 is emitted from the laser light emitting unit 6a with a reproducing laser beam that is weaker than the recording energy intensity and applied to the data recording part of the recording unit 7a of the optical disc recording medium 7. Reflected light is generated based on the recorded data, and the generated reflected light is received by the laser light receiving unit 6b to generate a received light signal.
Then, the received light signal is selected by the received light signal selecting unit 8 to generate data, and the generated data is arranged as display data of the data display unit 18 by the reproduction data generating unit 10 and installed outside the optical disc recording apparatus 1. The data is displayed on the data display unit 18.

Next, after data is recorded on the recording unit 7a of the optical disc recording medium 7 by the optical disc recording apparatus 1, the optical head 6 is moved to the printing unit 7b of the optical disc recording medium 7 as shown in FIG. .
When the optical head 6 is positioned at the printing unit 7b, the pickup position signal of the driving unit 6c indicates the printing unit 7b. Therefore, the switching signal generated by the pickup position detecting unit 11 is for the printing unit 7b. With this switching signal, the terminal a and the terminal c of the SW1 of the switching unit 5 are connected, and the spot diameter adjusting unit 12 prints characters and symbols on the printing unit 7b with the spot diameter of the laser beam emitted from the laser emitting unit 6a. A spot diameter adjustment signal is generated so as to be the diameter of the print dot size to be generated, and the rotation control unit 14 has a low rotation speed so as to obtain energy capable of printing characters and symbols on the printing unit 7b of the optical disc recording medium 7. Thus, a rotational driving force control signal for rotating the optical disk recording medium 7 is generated.

Then, the data generation unit 17 generates print data indicating the contents of the data recorded in the recording unit 7 a of the optical disc recording medium 7.
The print data generated by the data generation unit 17 is stored in the print data recording unit 3 of the optical disc recording apparatus 1, and then the stored print data is read in accordance with the rotation speed of the optical disc, and the read print data is switched. By connecting the terminal a and the terminal c of the SW 1 of the unit 5 based on the switching signal generated by the pickup position detecting unit 11 and adding the terminal a to the laser emitting unit 6 a of the optical head 6, the laser emitting unit A laser beam having an intensity and a diameter having printing energy based on the print data is emitted from 6a to print characters / symbols or the like based on the print data on the printing unit 7b of the optical disc recording medium 7.

Next, the optical disk recording medium 7 will be described in detail.
As shown in FIG. 4B, the optical disc recording medium 7 includes a recording unit 7a for recording data, a printing unit 7b for printing characters and symbols, and the recording unit 7a and the printing unit 7b on a transparent substrate 7c. The two transparent substrates 7c are arranged so that the respective transparent substrates 7c are on the outside and are bonded together with the adhesive 7d, and then the clamp hole is penetrated in the center. The printing unit 7b is installed in the clamp area.

The printing part 7b is formed of a heat-sensitive rewritable material that can be printed and erased.
For the heat-sensitive rewritable material, a leuco dye and a dielectric for protecting the leuco dye are used. It is applied with a thickness of about 10 microns on the transparent substrate 7c.
The leuco dye develops color at approximately 170 ° C., maintains its colored state as soon as it is cooled rapidly after heating, and decolors when it is slowly cooled after coloring. Therefore, printing and erasing are performed using this property.
In the reversible thermosensitive recording medium which is the thermosensitive rewritable material according to the present invention, a photothermal conversion layer may be used. Such a photothermal conversion layer is provided in order to absorb light such as laser light and convert it into heat, and to develop or decolor the adjacent reversible thermosensitive recording layer. In general, such a light-to-heat conversion layer is preferably used by mixing or dispersing, for example, a dye having a large light absorption coefficient in the vicinity of the laser light wavelength in a resin or the like.
Such dyes include cyanine dyes, polymethine dyes, phthalocyanine dyes such as copper phthalocyanine dyes, naphthalocyanine dyes, dithiol metal complex dyes, triphenylmethane dyes, aminium dyes, diimonium dyes. Near infrared absorbing dyes such as dyes can be used. These pigments are preferably used in combination with a resin, and examples thereof include resins used for the above-mentioned base materials.

For example, the optical disk recording medium 7 for DVD-R is rotated at a linear speed of 55.84 m / sec, which is 16 × speed, and laser light is emitted from the laser light emitting section 6 a of the optical head 6 to record the recording section of the optical disk recording medium 7. 7a is heated at 600 ° C., and when printing is performed using the energy of laser light necessary to form a recording mark having a pitch of about 0.5 micron (recording track is 0.74 micron pitch), For example, when the laser beam diameter is 85 micron pitch, the required energy is 85 / 0.5, which is about 170 times. However, the layer thickness is about 10 microns with a data recording layer of 0.08 microns and a photothermal change layer for leuco of 0.8 microns. If there is double energy, it will be 1700 times in total.
Since the color development temperature is approximately 170 ° C./600° C., taking this into account, approximately 482 times more energy is required for printing on the printing unit 7b.
For this reason, in order to perform printing of the printing unit 7b using the optical head 6 used for the recording unit 7a of the optical disc recording medium 7 as it is, the laser emission power is approximately doubled and the linear velocity of 55.84 m / sec is 1 /. What is necessary is just to drop to 241 linear velocity 0.232 m / sec (equivalent to 177 rpm).
In order to perform print erasure, the energy of the print portion may be reduced by increasing the linear velocity of the print erasure portion, increasing the spot diameter, or lowering the laser emission power.

In this way, the recording and erasing of the recording unit 7a of the optical disc recording medium 7 and the printing and erasing of the printing unit 7b can be performed by setting the linear velocity of rotation of the optical disc recording medium 7 to be suitable for each. The head 6 can be used.
Therefore, it is possible to print data and characters / symbols that display data contents on the same surface of the optical disc recording medium 7, and to record and erase data and to print and erase characters / symbols almost simultaneously.

In order to easily print characters and symbols on the printing unit 7b of the optical disc recording medium 7, a plurality of marks are set on the printing unit 7b in advance with a predetermined width W and a predetermined length L on a reference line. The timing for reading the print data stored in the print data storage unit 3 is controlled by the mark position.
The mark placed on the reference line may be printed by the optical head unit 6 before printing data is printed on the printing unit 7b. In this case, marks are printed on the reference line by sequentially moving the optical head 6 to the center of the optical disk without rotating the optical disk recording medium 7.

 As shown in FIG. 5, the reference line marks are formed in a straight line on the printing unit 7 b toward the center of the optical disk recording medium 7. For example, the size of each mark is from the far side of the center of the optical disk 7. W0 × L0, W1 × L1, W2 × L2, W3 × L3, W4 × L4, W0> W1> W2> W3> W4, and L0 = L1 = L2 = L3 = L4.

As shown in FIG. 6B, the size of the mark placed on the printing unit 7b is set to be much larger than the recording dots of the data recorded in the recording unit 7a shown in FIG. The mark position during printing can be accurately detected.
That is,
Dmax << W, T << L
And

Also, as shown in FIG. 7, for example, when a character is printed with vertical 12 dots × horizontal 12 dots, the size of one character is 1 dot (φ0) and 1 dot interval (p0) is 85 microns. .020 mm × 1.020 mm (85 μm corresponds to about 300 dpi as the resolution at the time of printing. Dpi: dot per inch).
Therefore, the minimum mark size must be larger than the size of this single character.
W> 1.020mm, L> 1.020mm
And
When setting the size of one character according to the mark size of each position,
Minimum size mark (W4, L4 standard)> Maximum single character size (W0, L0 standard)
And
Of course, the dot size of the character is not limited to 300 dpi. For example, it may be 200 dpi (127 microns), 240 dpi (105 microns), or the like.

The number of characters that can be printed on the printing unit 7b is, for example, when the clamp area is in the range of 15 mm to 26 mm in diameter, for example, when the dot size of the character is 85 microns when the diameter is 20 mm, one character is 1.020 mm. .14) /1.020 mm = 61, but if the mark is subtracted for two characters, 59 characters can be printed.
By setting the dot size of the character at the minimum diameter to 15 mm / 20 mm × 85 microns = 63.75 microns, the same number of characters as at the maximum diameter is obtained.
Since the number of character dots is (20 mm × 3.14) / 85 microns = 738 when the diameter is 20 mm, the optical disk is accurate with a step feed angle of 360 ° / 738 = 0.49 ° around the circumference of the optical disk. The recording medium 7 is rotated.

 In this way, the size of characters and symbols printed on the printing unit 7b and the printing position are determined by the mark position. The closer to the center of the optical disk, the smaller the size, and the number of printed characters is almost constant. Since the print start position is fixed at a fixed angle, the arrangement of characters to be printed can be designated in advance.

Needless to say, a label coated with a heat-sensitive rewritable material may be bonded to set the printing portion in the clamp area.
In this case, since the clamp area is the reference surface of the optical disk recording medium 7, the surface deflection does not increase when the optical disk recording medium 7 is rotationally driven, and the slip of the optical disk recording medium 7 does not increase when the turntable is fixed. The label thickness is set to 100 microns or less.

 As described above, according to the optical disk recording apparatus in the embodiment of the present invention, data recording / erasing and printing on the recording unit 7a installed on the same surface of the optical disk recording medium 7 using the same optical head 6 are performed. Since the print data can be printed / erased on 7b, an optical disk recording apparatus having a small shape that can be easily attached to and detached from the optical disk and can be printed in the clamp area can be obtained.

1 is a diagram illustrating an overall configuration of an optical disc recording apparatus according to an embodiment of the present invention. It is a figure which shows sectional drawing of the optical disk recording device in embodiment of this invention, (A) is a figure for demonstrating the operation | movement which records in a data recording part, (B) is printing in a print data recording part. It is a figure for demonstrating operation | movement to perform. It is a figure which shows the clamp mechanism of the optical disk recording device in embodiment of this invention, (A) is the figure seen from the upper surface, (B) is the figure which shows the cross section seen from the side surface before optical disk mounting, C) is a view showing a cross section viewed from the side after the optical disk is mounted. It is a figure for demonstrating the structure of the optical disk used for the optical disk recording device in embodiment of this invention, (A) is the figure seen from the upper surface, (B) is a figure which shows the cross section seen from the side surface. It is a figure for demonstrating the character and symbol etc. which were printed on the optical disk, (A) is a figure which shows the printed character printed on the printing area, (B) shows the reference line installed in the printing area. FIG. It is a figure which shows the spot diameter and reference line of the data which were recorded on the optical disk, (A) is a figure which shows the spot diameter recorded on the data recording part based on data, (B) is a printing data recording part. It is a figure which shows the reference line currently recorded previously. It is a figure for demonstrating the spot diameter of the character recorded on the printing data recording part. It is a figure which shows the conventional optical disk recording device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Optical disk recording device, 2 ... Data recording part (data recording part), 3 ... Print data recording part, 4 ... Print position control part, 5 ... Switching part, 6 ... Optical head, 6a... Laser emitting section, 6b... Laser receiving section, 6c... Driving section, 7... Optical disc recording medium (optical disc), 7a. Recording material, 7c ... transparent substrate, 7d ... adhesive, 8 ... received light signal selector, 9 ... mark position detector, 10 ... reproduction data generator, 11 ... pickup position Detection part, 12 ... Spot diameter adjustment part, 13 ... Rotation part, 14 ... Rotation control part, 15 ... Turntable, 16 ... Clamp mechanism, 16a-0 to 16a-4 ...・ Locking spring, 16b ... Case

Claims (3)

In the optical disc recording apparatus for recording data using a laser beam to the optical disc having a data area and the data area in the same plane in the data area the inner peripheral side formed clamping area of
A data recording unit comprising a recording data to be recorded in the data area,
And Printout data recording section including a printing data to be recorded before Symbol clamping area,
A drive unit that generates a position signal based on a position where the laser beam is focused in the data region and the clamp region;
The position signal is reading the recorded data from the data recording unit and indicating the data area, and the switching Rikae portion to which the position signal is read out the print data from the print data recording unit to indicate the clamping region,
When the position signal indicates the data area, the spot diameter of the laser beam is used as a recording spot diameter, and when the position signal indicates the clamp area, the spot diameter for printing data is larger than the recording spot diameter. A pot diameter adjusting section;
When the position signal is indicative of the data area, the optical disc is rotated at a recording speed the the position signal indicates the clamp area, rotation of rotating in the recording slower than the rotational speed for the print data rotation speed A control unit ,
When recording the recording data in the data area, the laser beam is emitted with the recording spot diameter based on the recording data read by the switching unit while rotating the optical disc at the recording rotational speed. When the print data is recorded in the clamp area, the print data spot diameter is set based on the print data read by the switching unit while rotating the optical disk at the print data rotation speed. An optical disk recording apparatus characterized by irradiating the clamp area with a laser beam . A light receiving portion for receiving the laser beam irradiated on the optical disc;
Forming a linear reference line toward the center of the optical disc in the clamp area with the laser beam;
2. The optical disk recording apparatus according to claim 1, wherein when the light receiving unit detects a reference line formed in the clamp area, the switching unit reads the print data from the print data recording unit. A light receiving portion for receiving the laser beam irradiated on the optical disc;
2. The optical disk recording apparatus according to claim 1, wherein when the light receiving unit detects a reference line formed in the clamp area, the switching unit reads the print data from the print data recording unit.

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