JP3188869B2 - Optical information recording medium package and method for providing optical information recording medium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information recording medium on which information as a digital signal readable by an optical method such as a compact disk is recorded.

[0002]

2. Description of the Related Art As conventional optical information recording media from which information can be read by an optical method, compact discs, laser discs, and the like are widely known. In recent years, such an optical information recording medium has been widely used not only for appreciating music and video but also for recording computer software. Recently, these optical information recording media are often provided as appendices to books and magazines.

The configuration of such a conventional optical information recording medium will be described with reference to FIG. 4 taking a compact disc as an example. FIG. 4 is a schematic sectional view showing a configuration of a conventional optical information recording medium. The conventional optical information recording medium shown in FIG. 4 is composed entirely of a disc 1 having a disk shape. Then, light is made incident from one surface 10 of the disk 1 to read information. Hereinafter, the one surface 10 is referred to as a “reading side surface”. The surface 11 opposite to the reading side surface 10 is a printing surface on which characters and the like are printed with respect to recorded information.

An information recording section 12 that records digital signals as information is usually provided inside the thickness of the disk 1. The information recording section 12 has a configuration in which small concave portions called pits are formed along a spiral track. Information is digitally recorded by the length and interval of the pit in the track direction.

On the printing surface side of the information recording section 12, a reflective layer 1 is provided.
3 are formed. The reflection layer 13 is made of a metal film such as aluminum applied along the unevenness of the information recording unit 12. The reading surface side of the information recording unit 12 is a protective layer 14. The protective layer 14 is provided so that the information recording section 12 is not exposed on the surface of the disk 1, and is formed of a translucent resin or the like.

[0006] The light from the laser is pick amplifier lens 2
When the light is condensed and enters the disk 1, the incident light is reflected back to the reflection layer 13. At this time, the manner of reflection changes depending on the presence or absence of the pits in the information recording unit 12, and the change is detected by detecting the intensity of the reflected light with the detector through the pick amplifier lens 2, and the information is read as a digital signal.

[0007]

In the optical information recording medium according to the above construction and operation, most of the thickness of the disk 1 is the thickness of the protective layer 14, and the material is plastic such as polycarbonate or acrylic. is there. Disc 1
Is determined to be 1.2 mm in the case of a compact disc. For this reason, the conventional optical information recording medium has a hard plate shape and has little flexibility. For this reason, when a conventional optical information recording medium is externally applied with a bending force having a radius of curvature of, for example, 1 m or smaller, the information recording unit 12 or the reflective layer 13 is deformed, and There was a problem that could not be read or cracked. In order to prevent such a problem and to protect the reading side surface, they are housed in a dedicated plastic hard case and packaged and provided to consumers. Therefore, packaging and distribution costs are relatively high in this area.

When an optical information recording medium is provided as an appendix to a book or magazine, it is provided in a form sandwiched between the book and magazine. Since the optical information recording medium is provided as an appendix, it is necessary to reduce the cost as much as possible.However, in order to prevent cracking of the optical information recording medium, the optical information recording medium is protected by a protective member using cardboard or the like. Is wrapped and sandwiched. For this reason, an automatic wrapping machine using dedicated cardboard or the like is required, and there is a problem that the cost increases.
Further, when the book or magazine is protected and sandwiched by a dedicated cardboard or the like, the book or magazine cannot be bent. Careless bending may also break the optical information recording medium, which is inconvenient to handle.

The invention of the present application has been made to solve such a problem in the conventional optical information recording medium, and it is possible to reduce the cost of the optical information recording medium and to provide various forms of consumer information. The purpose is to be able to provide.

[0010]

To solve the above object, according to an aspect of, the present application according to claim 1 invention, the information recording portion in which information as a digital signal that can be read by optical method is recorded An information recording medium comprising an optical information recording medium comprising a medium sheet having flexibility not less than a degree capable of being bent into an arc having a radius of curvature of 1 m, and a protection sheet having flexibility while protecting the information recording section. Is provided on the reading side of the media sheet, the protection sheet is attached to the reading side of the media sheet so as to cover the reading side of the media sheet, and the protection sheet can be peeled by human hands of the media sheet The media sheet and the protection sheet have the same thickness.
To solve the above problems, the invention of the second aspect, provides the consumer with paste while bending an optical recording medium package according to claim 1, wherein along the surface is other curved items It has the structure of. In order to solve the above-mentioned problem, the invention according to claim 3 of the present application has an information recording section in which information is recorded as a digital signal that can be read by an optical method, and bends into an arc having a curvature radius of 1 m. The optical information recording medium, which is formed of a medium sheet having a degree of flexibility higher than that of the other products, can be provided to the consumer by sticking while bending along the surface of another product.

[0011]

Embodiments of the present invention will be described below. FIG. 1 is a schematic perspective view showing an optical information recording medium according to an embodiment of the present invention and an optical information recording medium package provided with the optical information recording medium.
FIG. 2 is a schematic sectional partial view of the optical information recording medium and the optical information recording medium package shown in FIG. 1.

First, the optical information recording medium according to the present embodiment is entirely composed of a flexible medium sheet 3. The medium sheet 3 is formed of a material such as polycarbonate, and has a thickness of about 0.1 to 0.3 mm. The medium sheet 3 has the same dimensions and shape as the compact disk described above except for the thickness.

The flexibility of the medium sheet 3 is such that when a bending force is applied to the conventional optical information recording medium so that the radius of curvature is 1 m or smaller, the information recording section 1 has a large curvature.
2 and the reflective layer 13 are deformed or the optical information recording medium is cracked. Therefore, when the medium sheet 3 is bent, the bent portion coincides with or inscribes an arc having a radius of curvature of 1 m.

The medium sheet 3 has an information recording section 31. The information recording unit 31 is slightly different from a conventional compact disk or the like. The information recording unit 31 includes the medium sheet 3
Is exposed on one side of the substrate. The information recording unit 31
This is a configuration in which a digital information pattern (hereinafter, referred to as an information pattern) 310 is provided in a layer provided with a constant thickness from one side. The information pattern 310 has a configuration in which the light reflectance is partially increased, and is formed at a predetermined pitch along a spiral track, like the pits in a conventional compact disk.

The optical information recording medium of the present embodiment also, the information is read similar to the conventional mechanism. That is, while rotating the optical information recording medium at a predetermined number of revolutions, a laser beam is applied to the information recording section 31 via the pickup lens as in the conventional case. The focus of the pickup lens is set on the surface of the information recording unit 31. When the laser light is applied to the portion of the information pattern 310, the intensity of the reflected light increases, and this is detected via the pickup lens. The intensity of the reflected light changes periodically reflecting the configuration of the information pattern, and by performing signal processing on this change, a large amount of information such as music and computer programs can be obtained.

Next, a method for forming the information recording section 31 will be described. First, a film (hereinafter, referred to as a master film) on which the same pattern as the information pattern 310 is drawn is prepared. This master film transmits light in the same pattern as the information pattern 310. Then, a photosensitive agent is applied to the surface of the medium sheet 3 that will become the information recording section 31. Next, the master film and the surface coated with the photosensitive agent are overlapped, and light is irradiated from the master film side. As the photosensitive agent, those whose properties change due to a reaction when exposed to light and which enhance light reflectivity are used. Therefore, the configuration of the information recording unit 31 including the information pattern 310 having the partially improved reflectivity as described above is obtained. Note that the surface of the information recording section 31 may be covered with a transparent resin or the like to form a protective layer.

On the other hand, the optical information recording medium package is
The optical information recording medium of the present embodiment including the medium sheet 3 described above, a protective sheet 4 covering the optical information recording medium, and two auxiliary sheets 51 and 52 provided flush with the medium sheet 3. It is configured. The optical information recording medium package of the present embodiment has a rectangular sheet shape shown in FIG. The shape of the optical information recording medium package can be any shape other than a square.

The auxiliary sheets 51 and 52 are made of polycarbonate or the like similarly to the medium sheet 3 of the optical information recording medium described above, and have a thickness of 0.1 to 0.3 mm.
It is about. For the auxiliary sheets 51 and 52, it is more advantageous to use the same material and the same thickness as the medium sheet 3 in terms of manufacturing. The protection sheet 4 is formed of a flexible material such as paper or a plastic film. As shown in FIG.
The protective sheet 4 has the same thickness as the medium sheet 3.
However, different thicknesses may be used. The protective sheet 4 is a medium
The same material as the sheet 3 may be used.

As can be seen from FIG. 1, the protective sheet 4 is larger than the medium sheet 3 and has an arbitrary size capable of covering the information recording section 31.
× 297 mm). On the other hand, two auxiliary sheets 5
One of 51, 52 has the same contour as the protective sheet 4 and a circular opening formed in the center.
The diameter of this opening is slightly larger (for example, about 0.1 mm) than the diameter of the medium sheet 3. The medium sheet 3 is located in the center opening of the auxiliary sheet 51. The other auxiliary sheet 52 is a medium sheet 3
A circular sheet slightly smaller than the central opening of
It is located in the central opening of the media sheet 3.

As shown in FIG. 2, the protective sheet 4 and the medium sheet 3 and the protective sheet 4 and the auxiliary sheets 51 and 5 are provided.
2 is bonded with an adhesive 6. As the adhesive 6, an adhesive having such an adhesive strength that the medium sheet 3 can be peeled from the protective sheet 4 by a human hand is used. Specifically, as the adhesive 6, for example, an acrylic polymer such as DuroTak by Kanebo NSC is used.

The adhesive 6 has a considerably higher adhesion to the protective sheet 4 than to the medium sheet 3. Therefore, when the medium sheet 3 is peeled from the protection sheet 4, the adhesive 6 does not remain on the surface of the information recording section 31 of the medium sheet 3 but remains on the protection sheet 4 side. The difference in adhesion is often caused by the difference in material. However, when the medium sheet 3 and the protective sheet 4 are made of the same material, the difference in adhesion is changed by changing the state of the surface in contact with the adhesive 6 or the like. Is caused.

As the adhesive 6 in the present embodiment, in addition to a reactive adhesive which bonds by a chemical reaction, a non-reactive adhesive, for example, an adhesive which is applied by applying an adhesive force to a contacted object. In some cases, an adhesive is used. As the adhesive, the same material as that used for the peelable sticky notes manufactured by 3M can be used. In addition, on the surfaces of the medium sheet 3, the protection sheet 4, and the auxiliary sheets 51 and 52 exposed to the outside, printing of items related to information recorded in the information recording unit 31 of the medium sheet 3 is performed. .

A method of using the optical information recording medium package according to the present embodiment having the above-described configuration will be described by taking a compact disc as an example. First, two hard disks satisfying the current standard of the compact disk when the optical information recording medium composed of the medium sheet 3 is sandwiched are prepared. This disk has a disk shape with the same dimensions and shape as the compact disk, and the entire thickness becomes the same as that of the compact disk when the medium sheet 3 is sandwiched therebetween. At least one of the two disks is translucent.

As described above, the medium sheet 3 is peeled off from the protective sheet 4 and is sandwiched between two disks so that the side on which the information recording section 31 is formed is in contact with the translucent disk. Then, the information recording unit 31 is mounted on a CD player so that the information recording unit 31 faces the pick amplifier lens, and reproduces information. The two disks are fixed as required by a method such as fitting or bonding.

The above-mentioned method of use is for the case where a current CD player is used. However, if the CD player is improved in the future, it is possible to directly reproduce the optical information recording medium including the medium sheet 3 described above. . That is, a CD in which the above-mentioned two disks are provided inside, and the medium sheet 3 is automatically inserted between the two disks.
A player.

Since the optical information recording medium in the above-described embodiment is constituted by the flexible medium sheet 3, there is no problem of cracking as in the prior art, and there is no need to put it in a plastic hard case. Further, even when the book or the magazine is provided in a sandwiched manner, it is not necessary to protect the card with a cardboard or the like, and there is no problem even if the book or the magazine is bent to some extent. Therefore, the cost of providing it to consumers is lower,
There are fewer restrictions on the delivery method. That is, in the present embodiment ,
The optical information recording medium has a significance like a digital version of a conventional sonosheet of an LP record.

The optical information recording medium of this embodiment is suitable for computer software that does not require much durability. That is, in the case of an optical information recording medium for computer software, after reading the information and transferring it to the hard disk of the computer, it is rarely used again and does not require much durability. Therefore, the present embodiment is particularly suitable as an inexpensive medium for such computer software. Further, in the optical information recording medium package of the present embodiment described above, when the medium sheet 3 is peeled off from the protective sheet 4, the adhesive 6 remains on the protective sheet 4 side instead of the medium sheet 3 side. The problem that dust easily adheres to the surface does not occur.

The configuration of another embodiment of the optical information recording medium package of the present invention is as follows. First, the auxiliary sheet may be a single sheet having a circular opening in the center, and the medium sheet may be provided flush with the inside of the opening. In this case, there is a slight gap between the edge of the opening of the auxiliary sheet and the peripheral edge of the medium sheet, and several small connecting portions are provided so as to connect them. When used, the medium sheet is separated from the auxiliary sheet by cutting the connecting portion with scissors or the like.

The information recording section may be formed by the following method. One method is the same as the method for creating a master disc of a conventional compact disc. That is, a metal film for reflection is formed on the surface of the sheet, and the sheet is placed on a turntable. While rotating the turntable, an intense laser beam is condensed and irradiated on a predetermined small spot, and the metal film is partially evaporated to form a pit. In together when the on and off the irradiation of the laser beam in a predetermined pattern in accordance with a signal to be recorded, as pits along a spiral track is formed, displaced the irradiation position of the laser beam in accordance with the rotation of the turntable Let it do. Thereby, the configuration of the information recording section in which pits as information patterns are formed in the metal film is obtained.

As another method, information can be directly recorded on a sheet by an ion beam evaporation drawing method. That is, the surface of the transparent sheet is illuminated with an ion beam of a metal material having a sufficient reflection characteristic to be deposited.
At this time, the irradiation diameter of the ion beam is reduced to a predetermined small value by the electron lens, and the ion beam is scanned according to information to be recorded. Thereby, the configuration of the information recording unit in which the same reflection unit as the above-described information pattern is drawn on the sheet surface is obtained. Further, the formation of the information recording section 31 can also be performed by molding the medium sheet 3 using a stamper by an injection molding method, a light curing molding method, or the like, similarly to the production of a conventional optical information recording medium. It is.

Next, an embodiment of the invention of a method for providing an optical information recording medium will be described. FIG. 3 is a schematic perspective view illustrating an embodiment of the invention of a method for providing an optical information recording medium. The method of this embodiment is a method of providing the optical information recording medium package described above. That is, as shown in FIG. 3, the optical information recording medium package 3
0 is attached to the surface of another product and provided to the consumer.

Another product is, for example, whiskey, and the optical information recording medium package 30 is attached along the surface of the whiskey bottle 7. However, the optical information recording medium package 30 is affixed to the bottle 7 while being housed in a protective case 8 formed of a thin cellophane or the like. Adhesion to the bottle 7 may be performed by sticking with a tape or a method in which the optical information recording package 30 is placed on the surface of the bottle 7 and the whole bottle is covered with a film and adhered. Also, the optical information recording medium package 3
If there is no danger of the 0 being damaged, the protection case 8 or the like may be unnecessary. That is, an optical information recording medium or optical
The formula information recording medium package 30 may be directly attached to the surface of the bottle 7.

According to the method of the present embodiment, the optical information recording medium 30 such as a compact disk can be provided to the consumer in an inexpensive manner as an appendix to a product. For this reason, it will exert great power in promoting the sale of the product.

In the above description , a compact disc is taken as an example of an optical information recording medium. However, other optical information recording media such as a laser disc, a mini disc, a DAD, a video disc and the like can be similarly implemented. . Also, it is not limited to the medium on which information is already recorded,
The same can be applied to a medium on which information is recorded after being provided to a consumer, such as a CD-R (CD Recordable).

[0035]

As described above, according to the first aspect of the present invention, since the optical information recording medium has sufficient flexibility, the optical information recording medium does not crack and is protected by a dedicated hard case or a protective member such as a cardboard. Is no longer necessary. For this reason, the cost at the time of providing to the consumer is reduced, and various providing methods can be adopted. Further, since the information recording section is covered with the protective sheet, the information recording section is not scratched or dusty, and high-quality information can be recorded and reproduced. Further, according to the second or third aspect of the present invention, the optical information record can be provided to the consumer in an inexpensive manner as an appendix to the product, etc., and exerts great power in promoting the sales of the product.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an optical information recording medium according to an embodiment of the present invention and an optical information recording medium package provided with the optical information recording medium.

FIG. 2 is a schematic partial cross-sectional view of the optical information recording medium and the optical information recording medium package shown in FIG.

FIG. 3 is a schematic perspective view illustrating an embodiment of the invention of a method for providing an optical information recording medium.

FIG. 4 is a schematic sectional view showing a configuration of a conventional optical information recording medium.

[Explanation of symbols]

 Reference Signs List 3 medium sheet 30 optical information recording medium package 31 information recording section 4 protection sheet 51 auxiliary sheet 52 auxiliary sheet 6 adhesive 7 bottle 8 protection case

Claims (3)

(57) [Claims] 1. A medium sheet having an information recording section in which information as a digital signal readable by an optical method is recorded and having a flexibility of at least as large as an arc having a radius of curvature of 1 m. An optical information recording medium comprising: an optical information recording medium comprising: a protective sheet that protects the information recording section and has flexibility; the information recording section is provided on the reading side of the medium sheet; The media sheet is attached to the reading side of the media sheet so as to cover it, and the protective sheet is attached so that the media sheet can be peeled off by hand, and the media sheet and the protective sheet have the same thickness. An optical information recording medium package characterized by the above-mentioned. Providing wherein optical information recording medium characterized by providing the consumer with paste while bending the other optical recording medium package curved in a claim 1, wherein along the surface of the product Method. 3. A medium sheet having an information recording portion in which information is recorded as a digital signal readable by an optical method and having a degree of flexibility that can be bent into an arc having a radius of curvature of 1 m. A method for providing an optical information recording medium, characterized in that the optical information recording medium is provided to a consumer by bending the optical information recording medium along a surface which is a curved surface of another product.