JP2006099815A - Disk-shaped recording medium and tape-shaped recording medium cassette - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To print/erase index information of recorded contents and to eliminate disadvantage and inconvenience of a conventional label sticking system in a rewritable disk recording medium such as a recording type DVD and a CD-RW. <P>SOLUTION: An annular printing region 13 between a read-in region and a center hole of the DVD 11 is formed by using a thermally reversible coloring layer and the contents information obtained from recorded data is printed/erased in the printing region 13 by using a printing head 123a and an erasing head 124a to be thermal heads. As the thermally reversible coloring layer, a material which is formed by dispersing an organic low molecular substance such as a higher fatty acid in a polymer matrix and whose transparent state and whitening state are reversibly changed depending on temperature may be used. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a rewritable disk-shaped recording medium such as a recordable DVD (Digital Versatile Disk) (DVD + RW, DVD-RW, DVD + R, DVD-R, etc.), CD-RW (Compact Disk Rewritable), a video tape cassette, and the like. In particular, the present invention relates to an improvement in a system for printing contents and the like stored in a recording medium.

Conventionally, when recording and storing / managing various contents on a disk-shaped recording medium such as a recordable DVD or CD-RW, or a tape-shaped recording medium such as a video tape, the title, time information, and appearance of the recorded content In the case of a disc-shaped recording medium, information such as a person or genre (hereinafter referred to as “content information”) is written on a label by hand, or the content information is printed on a label by a dedicated printing device. By sticking to the annular area between the lead-in area of the disc and the center hole, or in the case of a tape-like recording medium, to a predetermined area of the cassette, it is possible to confirm what content is recorded on the recording medium. ing.

For example, in Patent Document 1 below, a desired tape-like label is simply and quickly used with a tape having an optimum width for a target recording medium for the purpose of sticking to a video tape cassette or its package. A tape-shaped label producing apparatus that can be produced has been proposed. In Patent Document 2 below, in a rotary printing apparatus that prints a desired image on a printing surface of a disk-shaped recording medium while rotating the disk-shaped recording medium by a print head in which the radial direction of the disk-shaped recording medium is set to the main scanning direction There has been proposed a method of printing a high-quality image so as not to cause density unevenness due to the peripheral speed difference.
JP-A-8-25710 JP 2000-127516 A

By the way, in the case of a write-once optical disc such as a CD-R (Compact Disk Recordable) that can record data only once, there is no problem because the recorded content cannot be changed. In the case of a recording medium that can be rewritten a plurality of times, such as a CD-RW or a video tape, the label must be replaced each time the content is rewritten or added. Therefore, each time you re-create the label and re-apply it, if you do it a lot, the previous label will not be completely removed and some will remain on the surface of the disc or cassette. In addition, the disk or cassette becomes unsightly due to the adhesive remaining and dirt. In particular, in the case of a disc-shaped recording medium, there is a problem that if there is any unremoved label, the moment of inertia with respect to the center of the disc is unbalanced and blurring tends to occur during rotation. Note that the rotary printing apparatus as in Patent Document 2 generally cannot perform overlapping printing on a disc, and is not suitable for printing content information on a rewritable disc-shaped recording medium.

Accordingly, in view of the problems found in the label sticking method, the present invention was created for the purpose of providing a disk-shaped recording medium or a tape-shaped recording medium cassette having a rewritable content information printing area. It was.

The present invention irradiates a disk-shaped recording medium with a thermoreversible coloring layer that repeats a coloring state and a decoloring state each time it is heated to a certain temperature or higher and returned to room temperature, or light having a wavelength in a predetermined range. The present invention relates to a disc-shaped recording medium in which a printing region composed of a photoreversible coloring layer that repeats a coloring state and a decoloring state each time is formed. Further, the present invention relates to a tape-shaped recording medium cassette, wherein a printing region comprising the thermoreversible color forming layer or the photoreversible color forming layer is formed on the surface thereof.

According to the present invention, the printing area of the disk-shaped recording medium and the tape-shaped recording medium cassette is formed of a thermoreversible color developing layer or a photoreversible color developing layer, so that characters or characters can be controlled by controlling heating or light irradiation on the printing area. A figure or the like can be repeatedly printed / erased. In particular, by providing a thermal recording device or optical recording device for printing with respect to the printing area in a data recording system for a recording medium, content information is automatically obtained from recorded data as well as print data created by operation input. Printing using the extracted data as print data is also possible.

A data recording system or a dedicated printing system that is capable of repeatedly printing / erasing characters, figures, etc. in the printing area of a disk-like recording medium and a tape-like recording medium cassette, and is provided with a thermal recording device or optical recording device for printing. By using the system, it is possible to provide a recording medium that can easily cope with the necessity of rewriting the content information in the print area based on the change or addition of the recording data.

Embodiments of a disk-shaped recording medium and a tape-shaped recording medium cassette according to the present invention will be described below in detail with reference to the drawings.
[Embodiment 1]
This embodiment relates to a disk-shaped recording medium, and here, a description will be given by taking DVD + RW (hereinafter simply referred to as “DVD”) as an example. First, FIG. 1A is an external perspective view of the DVD 11, and the board surface is formed by an information area 12 and a printing area 13. The information area 12 includes an innermost lead-in area 14, an outermost lead-out area 15, and a data recording area 16 between the areas 14, 15, and the print area 13 is the lead-in area. 14 and the center hole 17.

A feature of the DVD 11 of this embodiment is that the print area 13 is formed of a thermoreversible color forming layer. Specifically, as shown in FIG. 1B, which is a cross-sectional view of the print region 13, a thermoreversible coloring layer 18 is interposed between the substrate portion 11a and the transparent protective layer 11b. Also. FIG. 1C shows a structure in which thermoreversible coloring layers 18a and 18b are interposed on both sides of the printing area 13, and the thermoreversible coloring layers 18a and 18b are formed by transparent protective layers 11b and 11c on the front and back sides. If it is covered but the DVD 11 has an information area only on one side, the entire other side can be used as a print area.

As a material of the thermoreversible coloring layers 18, 18a and 18b, an organic low molecular weight substance such as a higher fatty acid is dispersed in a polymer matrix which is a resin matrix, and a transparent state and a cloudy state are reversible depending on temperature. Changeable materials (for example, a reversible superheated recording material disclosed in JP-A-5-169808) can be applied. The coloring / decoloring characteristics of the thermoreversible coloring layers 18, 18a, 18b are shown in FIG. First, in the thermoreversible coloring layers 18, 18a, 18b, organic low-molecular substances such as higher fatty acids having the property of changing the crystal form when subjected to thermal energy are dispersed, as shown by A in FIG. In the state, since a large single crystal is formed, light is transmitted and looks transparent, but in the state indicated by B, since it is polycrystalline, the light is scattered and appears cloudy.

In the temperature-transmittance relationship, when heating is performed in the transparent state of A, white turbidity starts at 90 to 100 ° C., and when the state is cooled to room temperature, the complete white turbid state of B is stabilized. On the other hand, when heated from the cloudy state of B, it becomes transparent at around 80 ° C., and when cooled from that state to room temperature, it returns to the transparent state of A and stabilizes. Therefore, the thermoreversible coloring layers 18, 18a, 18b can reversibly perform the coloring (white turbidity) / decoloring (transparent) state by controlling the heating temperature as described above. Etc. can be made cloudy and other backgrounds can be made transparent, or vice versa, information can be displayed.

Next, a block circuit diagram of a data recording / reproducing system for the DVD 11 is shown in FIG. This system has not only an original data recording / reproducing function but also a function of printing content information on the printing area 13 of the DVD 11, content information automatically acquired from recorded data on the DVD 11, or manual input. The content information thus obtained can be automatically printed on the print area 13 of the DVD 11.

This data recording / reproducing system reads a signal input / output processing unit 110 that receives a broadcast signal and performs electrical signal processing, reads data recorded on the DVD 11, and outputs a signal output from the signal input / output processing unit 110 to the DVD 11. And a recording / reproducing unit 120 that performs writing and erasing on the printing area 13 of the DVD 11, a control unit 130 that controls the entire system, an operation unit 140, a communication unit 150, a monitor 160, and a speaker 170. Has been.

The signal input / output processing unit 110 receives a broadcast signal such as terrestrial broadcast, satellite broadcast (BS), and satellite communication (CS) of a desired channel, and broadcast signals and recordings output from the tuner unit 111. A signal processing unit 112 that separates a reproduction signal output from the optical pickup 123a of the reproduction unit 120 into image / audio data, data broadcast data, EPG (Electronic Program Guide) data, etc. according to purpose, and is output from the signal processing unit 112. The image / sound processing unit 113 performs necessary processing on each of the image / sound data.

The broadcast signal of a desired channel output from the tuner unit 111 is separated into the data by the signal processing unit 112, but the image / audio data is transmitted to the image / audio processing unit 113, and the data broadcast data and EPG data are controlled by the control unit 130. Is output. When the broadcast signal is an analog signal, if the separated image data is a video signal that can be displayed on the monitor 160, the signal processing unit 112 outputs the video signal to the monitor 160, and the separated audio data is transmitted from the speaker. If the audio signal is reproducible at 170, the signal processing unit 112 outputs the audio signal to the speaker 170. For example, the image / audio processing unit 113 is a moving picture experts group phase (MPEG-2) in which the image / audio data output from the signal processing unit 112 is defined by ISO / IEC (the International Organization for Standardization / the International Electrotechnical Commision). In the case of 2), the image data is converted into a video signal that can be displayed on the monitor 160, and the audio data is converted into an audio signal that can be reproduced by the speaker 170, and output to the monitor 160 and the speaker 170, respectively. The signal processing unit 112 and the audio / video processing unit 113 are controlled by the control unit 130.

The recording / reproducing unit 120 records the data in the data recording area 16 of the DVD 11 and reads the data from the data recording area 16 and the optical pickup 121a as in the case of a normal DVD recording / reproducing apparatus. The optical pickup driving unit 121b for driving, the spindle motor 122a for rotating the DVD 11, and the SP motor driving unit 122b for driving the spindle motor 122a are included. A print head 123a for printing in the print area 13, a print head drive unit 123b for driving the print head 123a, an erase head 124a for erasing information printed on the print area 13 of the DVD 11, and an erase head 124a. The erasing head driving unit 124b and the printing mode Rollers 125a-1 to 125a-3 for supporting the peripheral edge of the DVD 11 at three locations during the recording, a roller attaching / detaching drive part 125b for attaching / detaching the rollers 125a-1 to 125a to the peripheral edge of the DVD 11, and a rotating shaft of the roller 125a-1 Are provided with a speed reduction mechanism 126, a printing motor 127 a that rotates the roller 125 a-1 through the speed reduction mechanism 126, and a printing motor drive unit 127 b that drives the printing motor 127 a.

The print head 123a and the erasure head 124a use a thermal head in which a large number of heating elements are aligned over a section corresponding to the width of the print area 13 of the DVD 11, and are separated from the DVD 11 in a non-printing state. At the time of printing, the print area 13 of the DVD 11 is set with a predetermined nip pressure, and in this state, the energizing elements are selectively energized corresponding to the print data from the print head driving unit 123b. In this embodiment, the print head 123a and the erasing head 124a are set in the print area 13 at a position symmetrical to the center of the DVD 11.

The three rollers 125a-1 to 125a-3 are separated from the peripheral edge of the DVD 11 in a non-printing state, but are simultaneously moved in the central direction of the DVD 11 by the roller attaching / detaching driving part 125b during printing to move the peripheral edge of the DVD 11 To support. During printing, the spindle motor 122a is set in an idling state in advance, and the printing motor driving unit 127b drives the printing motor 127a in this state, whereby the roller 125a-1 is rotated through the speed reduction mechanism 126. Therefore, even if the print head 123a and the erasing head 124a are brought into contact with the print area 13 of the DVD 11, the DVD 11 can be rotated with a strong torque.

The control unit 130 has a microcomputer configuration, stores various programs and fixed data in a built-in memory, and controls the entire data recording / reproducing system by executing these programs by the CPU. The operation unit 140 includes a display unit 141 and an input unit 142. The display unit 141 is a liquid crystal display and displays various information and input information necessary for operation. The input unit 142 is configured as a touch panel attached to the display unit 141, and is used to input setting information for recording reservation and print information for the DVD 11. The communication unit 150 is a part that acquires image / audio data and EPG data by connecting to the Internet or other video equipment.

Based on the above configuration, the data recording / reproducing system prints content information such as program data recorded on the DVD 11 in the print area 13 of the DVD 11 according to the procedure shown in the flowchart of FIG. First, when the recording start time of the recording reservation set by the user is reached, or when a recording start instruction is input from the input unit 142, the optical pickup driving unit is based on the write signal output from the signal processing unit 112. 121b is controlled, and the content data of the broadcast program received by the tuner unit 111 is recorded on the DVD 11 (S11). Then, when the broadcast program reserved for recording by the user ends, or when a recording end instruction is input from the input unit 142, the recording of the content data ends (S12).

Here, the control unit 130 confirms whether content information to be printed has been detected from the set recording reservation information or EPG data obtained from the signal processing unit 112 (S13). When the print data is detected, the control unit 130 causes the display unit 141 to display a selection screen as to whether or not to automatically acquire the print data from the recording data, and select “automatic acquisition” on the screen. Then, the screen is switched to a print data automatic acquisition setting screen as shown in FIG. 5 (S13 to S15). The user sets the print data with the input unit (touch panel) 142 while looking at the print data automatic acquisition setting screen. However, when acquiring from the recording reservation information, the options of “date / channel” and “recording time” are selected from the EPG. In the case of acquisition, options of “program name / date / recording time” and “genre / channel / performer” are provided, and by selecting one of the four buttons provided in the center, Set one of the options.

On the other hand, if the print data cannot be detected, or if the print data can be detected and automatic acquisition is not performed, the print data input mode can be set by giving an instruction from the input unit 142, and the mode is set. Then, the print data input screen shown in FIG. 6 is displayed on the display unit 141 (S17). The user performs character input from the input unit 142 for each item shown on the print data input screen and inputs and sets print data. However, as shown in FIG. 6, the user can also set printing on / off for each item. (S18).

When the print data setting is completed, the user gives a print start instruction from the input unit 142 (S19). Based on the instruction input, the control unit 130 controls the SP motor driving unit 122b to switch the spindle motor 122a to the idling state, and controls the roller attaching / detaching driving unit 125b, so that each of them is separated from the DVD 11. The rollers 125a-1 to 3 are simultaneously moved inward, and the peripheral edge of the DVD 11 is gripped by the rollers 125a-1 to 3 (S20, S21).

Next, the control unit 130 controls the print head driving unit 123b and the erasing head driving unit 124b to set the printing head 123a and the erasing head 124a in the printing area 13 of the DVD 11 (S22). That is, at the stage where each of the rollers 125a-1 to 3 grips the DVD 11, the clamper that fixes the DVD 11 to the turntable is released at the time of recording / reproducing the content data, and the upper side of the print area 13 is opened. Thus, the print head 123a and the erasing head 124a are brought into contact with the opened print area 13 at a predetermined nip pressure.

When the setting of each head 123a, 124a is completed, the control unit 130 controls the printing motor driving unit 127b to rotate the printing motor 127a (S23). Accordingly, the roller 125a-1 is rotated via the speed reduction mechanism 126, and the DVD 11 rotates while being held by the rollers 125a-1 to 3; however, the control unit 130 is in the rotated state and the erasing head driving unit 124b. To turn on all the heating elements of the erasing head 124a (energized state). As a result, the print area 13 is sequentially heated in the circumferential direction as the DVD 11 rotates, but the overheat temperature is always set to about 80 ° C., and the thermoreversible coloring layer 18 in the print area 13 is set. Is in the transparent state of A based on the erasing characteristics described with reference to FIG. That is, when the DVD 11 is rotated once, all print information in the print area 13 is erased (S23).

When the erasure of the print information is completed, the process proceeds to a data print procedure while maintaining the rotation of the DVD 11, and the control unit 130 drives the print head to automatically print or input and store the print data stored in the built-in memory. The data is read to the unit 123b, and the heat reversible coloring layer 18 in the print region 13 of the DVD 11 is selectively energized to each heating element of the print head 123a based on the print data while synchronizing with the rotation speed of the DVD 11. Print (S24). That is, although the entire print area 13 is in the transparent state A in FIG. 2 in step S23, energization control for each heating element is executed by a method of forming dots of print data characters in the circumferential direction of the print area 13. Then, each dot is heated to 90 to 100 ° C. at a required timing and then returned to room temperature, thereby changing the dots constituting the character to the cloudy state of B in FIG. Therefore, when printing is performed based on the setting data shown in FIG. 6, the character portion of the print area 13 of the DVD 11 shown in FIG. 7 becomes a cloudy white line and the other portion becomes transparent. Will be able to.

When the printing is completed, the control unit 130 stops the rotation of the roller 125a-1, causes the print head 123a and the erasing head 124a to be released from the contact state with respect to the print region 13 of the DVD 11, and each of the rollers 125a-1 to 3-3. Is released from the peripheral edge of the DVD 11, and the print data in the built-in memory is cleared (S26). For example, when recording a sequel to a previously recorded serial drama, the content information is already printed in the print area 13 and there is no need to change it. In step S19, a print cancel instruction operation is performed without giving a print start instruction, and even if print data is set, it is cleared (S19 → S27, S28).

[Embodiment 2]
This embodiment relates to a DVD in which a print area is formed with a photoreversible color forming layer. If described with reference to FIG. 1, the layers indicated by 18, 18a, and 18b in the print area 13 are formed of a photochromic material. There is a feature in that. This photochromic material is converted to compound X ′ by irradiating compound X with light of wavelength λ1, and reversible photoisomerization is returned to compound X by irradiating compound X ′ with wavelength λ2. It shows a reaction. Here, Compound X and Compound X ′ are isomers having different absorption spectra, and text / image information can be visually displayed by the difference in transmittance.

FIG. 8 is a block circuit diagram of the recording / reproducing unit of the data recording / reproducing system for the DVD 21 to which the photoreversible coloring layer is applied. The data recording / reproducing system in this case is the same as the configuration of the first embodiment except for the recording / reproducing unit 120 ′, and since the print area 13 ′ of the DVD 21 is formed of a photoreversible coloring layer, the recording / reproducing unit The print head 128a at 120 'is configured as a laser beam emitting unit capable of switching and emitting laser beams of wavelengths λ1 and λ2, and the print head driving unit 128b corresponds thereto. In the first embodiment, the erasing head 124a and its driving unit 124b, rollers 125a-1 to 3 and its attaching / detaching driving unit 125b, the speed reduction mechanism 126, the printing motor 127a and its driving unit 127b are provided. In the embodiment, they are not necessary.

In this embodiment, when there is a print start instruction for print data that is automatically acquired or input after content data is recorded on the DVD 21, the control unit 130 controls the spindle motor 122a via the SP motor drive unit 122b. Thus, the rotation speed of the DVD 21 is set to a constant low speed, and the print head driving unit 128b is controlled to move the print area 13 ′ of the DVD 21 in the radial direction while keeping the print head 128a in the laser beam emitting state of the wavelength λ1. As a result, the photochromic material in the print area 13 ′ becomes a compound X having a high transmittance, and even if content information is recorded in the print area 13 ′, all the print information is erased.

Next, the process proceeds to the start of printing of print data. The control unit 130 controls the print head driving unit 128b while synchronizing the rotation speed while maintaining the rotation speed of the DVD 21 at the low speed, The on / off of the print head 128a and the movement of the print head 128a in the radial direction based on the print data are controlled. However, in this case, the print head 128a is preset to be switched to the laser beam emission state of wavelength λ2.

In this embodiment, the print head 128a is controlled to be turned on / off at a required timing by a method of forming dots in the print area 13 ′, and the low-transmittance compound X is irradiated with the laser beam of wavelength λ2. The print character is composed of dots that become '. That is, in this embodiment, the print region 13 ′ of the DVD 21 is configured with a high-transmittance compound X portion and a low-transmittance compound X ′ portion by laser beam irradiation control, thereby making the character information visible. It is like that.

[Embodiment 3]
In this embodiment, a printing region composed of a thermoreversible coloring layer is formed on a VTR cassette which is a tape-like recording medium cassette. For example, as shown in FIG. 9, the print areas 32 and 33 corresponding to the label attaching area in the conventional VTR cassette 31 are formed by the thermoreversible coloring layer described in the first embodiment.

FIG. 10 is a block circuit diagram of a data recording / reproducing system for the VTR cassette 31. As is apparent from a comparison between FIG. 1 and FIG. 1, the recording / reproducing unit 200 is the same as that of the first embodiment except for the recording / reproducing unit 200. However, the recording / reproducing unit 200 corresponds to the VTR cassette 31 and the video mechanism unit 201. A print head 203a for printing on the print area 32 of the VTR cassette 31 and its drive section 203b, and an erasing head for erasing print information printed on the area 32. It is characterized in that it includes 204a and its drive unit 204b.

Here, the video mechanism unit 201 is a part for moving the video tape along a predetermined route, and includes various sensors such as a tape end sensor in addition to a capstan motor, a cylinder motor, a reel motor, and the like. Execute the operation. The video head unit 202 is a part that records video / audio signals on a video tape or reproduces video / audio signals from the video tape, and is composed of various video heads such as a drum head and a control head.

As for the print head 203a and the erasing head 204a, thermal heads are used in the same manner as in the first embodiment, and in each of the heads 203a and 204a, each heating element is perpendicular to the longitudinal direction of the print area 32 of the VTR cassette 31. Aligned in the direction. When erasing character information that has already been printed in the print area 32 of the VTR cassette 31, the erasing head driving unit 204b turns on all the heating elements of the erasing head 204a and keeps them in sliding contact with the printing area 32. Scan in the longitudinal direction of region 32. In addition, when printing characters related to content information in the print area 32, the print head drive unit 203b is controlled so that each heating element of the print head 203a is automatically acquired while synchronizing with its scanning speed. Alternatively, the ON / OFF setting is selectively performed based on the input print data.

Accordingly, in this embodiment, printing / erasing is performed while the print head 203a and the erasing head 204a are scanned along the printing area 32 of the VTR cassette 31, but the thermoreversible is performed on the same principle as in the first embodiment. The content information can be printed on the print area 32 formed by the sexual coloring layer. In FIG. 10, the print / erase mechanism for the print area 32 of the VTR cassette 31 is configured. However, the print / erase mechanism for the print area 33 (FIG. 9) may be configured.

[Embodiment 4]
In this embodiment, a printing region composed of a photoreversible color-developing layer is formed on a VTR cassette, and the layer composed of the photochromic material described in Embodiment 2 is formed in the printing regions 32 and 33 in FIG.

The recording / reproducing unit of the data recording / reproducing system for the VTR cassette will be described below with reference to FIG. The print head 203a and the erasing head 204a are light in which LEDs (Light Emitting Diodes) that emit light with light of wavelength λ2 and light of wavelength λ1 are aligned in a direction perpendicular to the longitudinal direction of the print region 32 of the VTR cassette 31, respectively. The recording unit is configured to move the print head 203a and the erasing head 204a and turn on / off each LED by the print head driving unit 203b and the erasing head driving unit 204b.

Therefore, as compared with the case of the third embodiment, the printing / erasing method using the print head 203a and the erasing head 204a is different from the heating method using the thermal head because the printing region 32 of the VTR cassette is formed of a photoreversible coloring layer. Only the light irradiation method by the optical recording unit is changed, and in principle, dot printing based on print data in the print area 32 can be performed as in the case of the third embodiment. That is, when erasing already printed characters in the printing area 32, all the LEDs of the erasing head 204a are in a light emitting state and scanned in the longitudinal direction of the area 32 while sliding in contact with the printing area 32. When characters related to content information are printed on 32, each LED of the print head 203a is selectively turned on / off based on automatically acquired or input set print data while synchronizing with the scanning speed. .

The present invention can be applied to a rewritable disc-shaped recording medium such as a recordable DVD or CD-RW, and a tape-shaped recording medium cassette such as a VTR cassette.

(A) is an external perspective view of a DVD + RW according to Embodiment 1 of the disk-shaped recording medium of the present invention, (B) is a cross-sectional view of a printing area, and (C) is a thermoreversible coloring layer interposed on both sides of the printing area. FIG. It is a graph which shows the coloring / decoloring characteristic of a thermoreversible coloring layer. 1 is a block circuit diagram of a data recording / reproducing system for DVD + RW according to Embodiment 1. FIG. It is a flowchart which shows the printing procedure of the content information with respect to the printing area | region of DVD + RW by a data recording / reproducing system. It is a figure which shows a print data automatic acquisition setting screen. It is a figure which shows a printing data input screen. FIG. 7 is a plan view of a DVD + RW when character information is printed in a print area based on the print data of FIG. 6. FIG. 6 is a block circuit diagram of a recording / reproducing unit of a data recording / reproducing system for DVD + RW (printing area is a photoreversible coloring layer) according to the second embodiment. FIG. 6 is an external perspective view of a tape-shaped recording medium cassette (VTR cassette) according to Embodiment 3. FIG. 10 is a block circuit diagram of a data recording / reproducing system for the tape-shaped recording medium cassette (VTR cassette) of FIG. 9.

Explanation of symbols

11, 21 ... DVD + RW, 11a ... substrate part, 11b ... transparent protective layer, 12 ... information area, 13, 13 ', 32, 33 ... print area, 14 ... lead-in area, 15 ... lead-out area, 16 ... data recording Area, 17 ... center hole, 18, 18a, 18b ... thermoreversible coloring layer, 31 ... VTR cassette, 110 ... signal input / output processing section, 111 ... tuner section, 112 ... signal processing section, 113 ... video / audio processing section, 120, 120 ', 200 ... recording / reproducing unit, 121a ... optical pickup, 121b ... optical pickup driving unit, 122a ... spindle motor, 122b ... SP motor driving unit, 123a, 128a, 203a ... print head, 122b, 128b, 203b ... Print head drive unit, 124a, 204a ... erase head, 124b, 204b ... erase head drive unit, 125a-1 to 3 ... roller, 126 ... Speed mechanism, 127a ... printing motor, 127b ... printing motor drive unit, 130 ... control unit, 140 ... operation unit, 141 ... display unit, 142 ... input unit, 150 ... communication unit, 160 ... monitor, 170 ... speaker, 201: Video mechanism part, 202 ... Video head part.

Claims (2)

In disc-shaped recording media,
A thermoreversible coloring layer that repeats a colored state and a decolored state each time the panel surface is heated to a certain temperature and returned to room temperature, or a colored state and a decolored state each time light of a predetermined wavelength range is irradiated. A disc-shaped recording medium characterized in that a printing area comprising a photoreversible color-developing layer repeating the above is formed. In a tape-shaped recording medium cassette,
A thermoreversible coloring layer that repeats a colored state and a decolored state each time the surface is heated to a certain temperature and returned to room temperature, or a colored state and a decolored state each time light of a predetermined wavelength range is irradiated. A tape-shaped recording medium cassette characterized in that a print area comprising a photoreversible color-developing layer that repeats the above is formed.

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