JPS63121188A - Optical recording and reproducing method for optical card - Google Patents

Abstract

PURPOSE:To realize a high recording density equal to an optical recording medium except a general optical card by charging a laminate film, cutting and removing a sealed part, peeling the charged laminate film by an electrical attraction force and recording and reproducing information in an optical recording member. CONSTITUTION:After the laminate film 2 is charged, the sealed part 3 is cut and removed, then, the charged laminate film 2 is peeled by the electrical attraction force, thereafter, the information is recorded and reproduced on the optical recording member 11, so that the record surface of the optical card is protected by the laminate film 2 and an external flaw or the adhesion of dust is received by the laminate film 2. Accordingly, except at the time of mounting in a writer or reader, the card surface is constantly maintained in a laminated state. Thereby, the high density recording and reproduction can be attained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an optical recording/reproducing method for an optical card, and more particularly to an optical recording/reproducing method for a card-shaped optical recording medium whose surface is protected with a laminate film. be.

[Prior Art] Conventionally, in optical carts, an optical recording layer is formed on a card substrate using a heat-melting medium mixed with a substance with high light reflectance such as silver, and a laser beam is applied to the optical recording layer. Information was recorded by forming bits (holes) by irradiating the device with a light beam.

Further, reading of recorded information was performed using, for example, COD.

However, in these conventional examples, an area of several tens of squares×several tens of squares is used per one bit. Also,
In optical recording such as CDs, generally an area of several pm x several square meters per bit should be sufficient, but the recording surface density is approximately 1 /
The reason why recording is performed using such a large area even though the number is 100 is that reading errors occur due to dust, scratches, etc. adhering to the recording surface.

On the other hand, when it comes to optical carts, it is unavoidable that they must be handled roughly due to their usage conditions, and therefore, conventional optical cards have the drawbacks of lower recording density and lower recording capacity. Ta.

[Problems to be Solved by the Invention] The present invention eliminates the above-mentioned drawbacks of the conventional example, and even in optical cards that are unavoidably handled roughly, Optical recording of card-shaped optical recording media that can achieve high recording density equivalent to that of recording media.
The purpose is to provide a reproduction method.

[Means for Solving the Problems] That is, the present invention provides an optical card in which both sides of a card-shaped optical recording member are covered with a laminate film, and the periphery of the laminate film is sealed to provide a sealing portion. In the method for recording and reproducing information, the laminate film is electrically charged, the sealing portion is cut and removed, and the charged laminate film is then peeled off by electrical attraction, and then information is recorded on the optical recording member.・This is an optical recording/playback method for an optical card, which is characterized by playback.

Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1 is a perspective view showing an example of an optical card according to the present invention. In FIG. 0, 1 is a card-shaped optical recording member that performs recording and reproduction, and 2 is a laminate film that protects the optical recording member.

In FIG. 1, the optical cart according to the present invention covers both sides of a card-shaped optical recording member l with a laminate film 2 having a larger area than the optical recording member 1, and by thermocompression bonding or the like around the laminate v2. The optical recording member l is sealed by providing a sealing portion 3 to protect the optical recording member l.

Specific examples of the laminate film used in the present invention include a laminate film in which PUT, modified acrylic, thermoplastic polyester, ethylene-vinyl acetate copolymer, or the like is coated on a PET film.

In the present invention, in order to protect the recording surface of an optical card from damage and dust, after writing information, it is laminated with a laminate film such as a transparent material, and the laminate film is removed once when reading or rewriting. It is separated, read or rewritten, and then laminated again and sent outside.

When information is recorded and played back on the optical cart in this way, it is always laminated except when the writing or reading device is installed inside the optical cart, so scratches and dirt from the outside will be removed from the laminate. Since it adheres to the film, it does not interfere with reading or writing on the recording surface, allowing high-density recording and reproduction.

[Function] The optical recording/reproducing method for an optical card according to the present invention covers both sides of a card-shaped optical recording member with a laminate film, and seals the periphery of the laminate film to provide a sealing part. In the method for recording and reproducing information, the laminate film is electrically charged, the sealing portion is cut and removed, and the charged laminate film is then peeled off by electrical attraction, and then information is recorded on the optical recording member.・For playback, the recording surface of the optical card is protected by a laminate film, and the laminate film protects it from scratches and dirt from the outside.During recording and playback, the laminate film is charged, and the laminate film is charged with a charge opposite to that of the laminate film. The laminate film can be peeled off without damaging the recording surface of the optical card by using an electrically charged device.

[Example] Next, the present invention will be described in more detail based on the example shown in the drawings.

2 to 5 are explanatory diagrams showing the step of peeling off the laminate film in the optical recording/reproducing method for an optical card according to the present invention.

First, the surface of the optical card coated with the laminate film 2 shown in FIG. 1 is charged using a charging roller 4 or the like as shown in FIG. Thereafter, as shown in FIG. 3, for example, the sealing part 3 bonding the upper and lower parts of the laminate film 2 is cut and removed using a press cutter 5 or the like.

Next, as shown in FIG. 4, when a voltage is applied and the laminate film 2 is passed through the take-up roller 6, which is charged with an opposite charge to that of the laminate film, the charged laminate film 2 is passed through the take-up roller 6. It is removed by suction. The film attached to the take-up roller 6 is
After removing the voltage or applying a reverse voltage, it can be removed using a spatula-shaped claw 7 or the like as shown in FIG.

In the present invention, charging does not necessarily need to be performed using a roller, and other means may be used as long as charging can be achieved.

Further, the cutter does not need to be a press type as long as it can cut.

Laminate II! Regarding the method for removing 122, as shown in FIG. 6, without using the take-up roller 6 shown in FIG.
A method may also be used, such as applying a voltage to the plate-shaped removal plate 8 and adhering it by suction from above and below, and then separating it.

Although it is easy to attach a laminate film to an optical card, it is not always easy to remove it stably and without damaging the optical card. Moreover, the light cart can be removed without the possibility of causing fine scratches or the like.

[Effects of the Invention] As explained above, according to the present invention, in a method for attaching and detaching a laminate film to an optical card, it is possible to easily and reliably remove the laminate film without causing any fine scratches or the like to the optical card. 1. Even on optical cards that are normally handled roughly, it is possible to record at several micrometers per bit x several microseconds/bit.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an optical card coated with a laminate film according to the present invention, and FIGS. FIG. 6 is an explanatory diagram showing another method of peeling off the laminate film.

Claims (1)

[Claims] Both sides of a card-shaped optical recording member are covered with a laminate film,
In a method for recording and reproducing information on an optical card in which the periphery of the laminate film is sealed and a sealing part is provided, the laminate film is charged, the sealing part is cut and removed, and then the charged part is removed. 1. An optical recording/reproducing method for an optical card, which comprises: separating a laminate film using electrical attraction, and then recording/reproducing information on an optical recording member.