JPH09245381A - Optical disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make possible storing information of a disk in the disk without losing the compatibility of the disk. SOLUTION: An optical disk 1 is formed by sticking the disk 1A to the disk 1B each other. A circuit part 6 consisting of a CPU, a memory, a transmission and reception circuit and a power source circuit, and a coil part 7 led out from the circuit part are buried between the disk 1A and the disk 1B. Then, the data are inputted/outputted without contacting between with the outside by connection of the coil part. Since the circuit part 6 and the coil part 7 are buried in the disk, the external size of the disk isn't changed, and the compatibility is secured. Further, since the input/output of the data between with the outside are performed without contacting, the reliability is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc capable of recording the contents and history of a disc, and more particularly to an optical disc suitable for use in a DVD.

[0002]

2. Description of the Related Art Optical disks (DVD and Is called) is being developed. For such a DVD, for example, MP
It is expected that the digital video signal compressed by EG2 will be recorded and used not only for reproducing moving images but also as a recording medium for recording a large amount of digital data.

In a large-capacity recording medium such as a DVD, the amount of recorded data becomes enormous, which makes it difficult to manage the data. In addition, since a digital video signal is recorded on a DVD, the history of recorded programs, recording date, number of recordings, and the like, and I
It becomes necessary to manage D information. Therefore, a memory for storing information about the disc is provided, and the contents of files and programs on the disc, recording date, history, and I are stored in this memory.
It is conceivable to record D etc.

As described above, when the memory for storing the information about the disc is provided, it is conceivable to provide the memory storing the disc information in the disc cartridge in which the disc is housed. In this case, when the disc is mounted in the player body, the memory in the disc cartridge and the controller in the player body are connected via the connector. From the memory in the disc cartridge, the contents of files and programs, recording date, history,
Information about the disc, such as the ID, is read, and the disc is managed by this.

[0005]

However, the DVD does not have a structure in which the disc and the disc cartridge are integrated in order to achieve compatibility with the existing compact disc. Therefore, as described above, it is impossible to provide the memory in the disk cartridge.

Therefore, it is conceivable to install a memory in which the information of the disc is stored in the disc so as to deal with the case of the optical disc having no disc cartridge. However, in this case, since the disc is rotating, the memory attached to the disc and the controller in the player body cannot be connected by the connector. It is conceivable that the signal lines derived from the memory side in the disc are arranged in a ring along the circumference of the disc and the brush is slid on the ring-shaped signal line. The structure has a problem in reliability.

Therefore, for example, a memory in the disk,
It is conceivable to connect the controller in the player body with an electromagnetic wave. However, if the disc has such a function and the disc thickness or the disc shape is different from that of the conventional disc, the compatibility becomes a problem.

Therefore, it is an object of the present invention to provide an optical disc capable of storing disc information without losing compatibility of the disc.

[0009]

The present invention has a first signal recording surface and a second signal recording surface, and the first signal recording surface and the second signal recording surface are bonded together. In the optical disc, a memory for recording information relating to the disc is provided between the first signal recording surface and the second signal recording surface,
An optical disc is characterized in that an input / output unit for inputting / outputting information to / from a memory is arranged in a non-contact manner.

A circuit section including a CPU, a memory, a transmission / reception circuit, and a power supply circuit, and a coil section derived from the circuit section are embedded in the optical disk. By connecting the coil portions, data can be input / output to / from the outside without contact. Since the circuit portion and the coil portion are embedded in the disc, the outer shape of the disc does not change and compatibility is maintained. Further, since data can be input / output to / from the outside in a contactless manner, reliability is improved.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is an optical disc. The optical disc 1 has a diameter of 120 mm and a thickness of 1.2 mm, maintains the compatibility of the outer shape with the existing compact disc, uses a laser beam with a short wavelength, and increases the numerical aperture of the objective lens to reduce the current compact size. It is an optical disc (DVD) having a recording capacity of about 8 to 10 Gbytes, which is several times that of a disc. A hole 10 is formed in the center of the optical disc 1. When the optical disc 1 is mounted on the player, the optical disc 1 has a hole 10
Is rotated around.

As shown in FIG. 2, the optical disc 1 has a structure in which two discs 1A and 1B are bonded together. That is, FIG. 2 shows a sectional structure of the optical disc 1. A first reflective film 3A made of, for example, aluminum is laminated on a substrate 2A having a thickness of 0.6 mm, and a protective film 4A is laminated on the first reflective film 3A to form a disc 1A. Also,
An optical disc 1B is formed by laminating a second reflecting film 3B made of aluminum, for example, on a substrate 2B having a thickness of 0.6 mm, and laminating a protective film 4B thereon. The two discs 1A and B are attached to each other via the adhesive layer 5.

In FIG. 1, the area A1 of the optical disk 1 is shown.
The data is recorded in. The data recording area A1
Area A2, which is not used for data recording, on the inner circumference side of
A circuit unit 6 for storing information on the disc and a coil unit 7 derived from the circuit unit 6 are provided. The coil portion 7 is embedded so as to have the same central axis as the optical disc 1.

As described above, the optical disc 1 is constructed by laminating two discs 1A and 1B, and the circuit section 6 and the coil section 7 are composed of the two discs 1
It is arranged between A and the disc B. That is, as shown in FIG. 3, a concave portion 8A is formed in a portion of the disc 1A where the circuit portion 6 and the coil portion 7 are arranged, and similarly, the circuit portion 6 and the coil portion 7 of the optical disc 1B are arranged. A recess 8B is formed in the portion. Disks 1A and 1B
The circuit portion 6 and the coil portion 7 are arranged in the gap formed between the concave portion 8A and the concave portion 8B when they are bonded together. As described above, since the circuit section 6 and the coil section 7 are embedded between the two disks 1A and 1B, even if the circuit section 6 and the coil section 7 are arranged, the physical shape of the disk does not change. does not change.

FIG. 4 shows the configuration of the circuit section 6. In FIG. 4, contents of files and programs, recording date, history, ID, etc. are stored in the memory 12. Data read / write from / to the memory 12 is performed by the CPU 11
Is controlled by Input / output of data to / from the outside is performed by the coil unit 7 and the transmission / reception circuit 13 in a non-contact manner by electromagnetic waves. In addition, a power supply is formed by smoothing a carrier wave given from the outside. The power supply formed is the power supply circuit 1
4 to the CPU 11, the memory 12, and the transmission / reception circuit 13.

FIG. 5 shows the configuration of an external circuit for exchanging data with the circuit section 6 in the optical disk 1. In FIG. 5, a CPU 22, a memory 22, a keyboard 23, and a transmission / reception circuit 24 are provided. A coil unit 25 is derived from the transmission / reception circuit 24. Data input / output is performed by the coil unit 25 and the transmission / reception circuit 1.
4 is performed. A power supply circuit 26 is provided for the transmission / reception circuit 14.

The circuit section 6 in the optical disk 1 shown in FIG.
Input / output of data between the external circuit and the external circuit shown in FIG. 5 is performed as shown in FIG. As shown in FIG. 6, the coil portion 7 of the optical disc 1 and the coil portion 25 of the external circuit are arranged to face each other. As described above, the coil portion 7 of the optical disc 1 is arranged on the same rotation axis as the rotation axis of the optical disc 1. The external coil unit 25 is also arranged on the same rotation axis as the rotation axis of the optical disc 1. In this way, when the coil portion 7 and the coil portion 25 are arranged so as to face each other, the coil portion 7 and the coil portion 25 are coupled to each other.

From the external circuit to the circuit section 6 in the optical disk 1
When the data is sent to, the data from the CPU 21 is sent to the transmission / reception circuit 24. The transmission / reception circuit 24 modulates the data. The modulated data is supplied to the coil unit 25. Since the coil section 25 and the coil section 7 are coupled, the output of the coil section 25 is transmitted to the coil section 7, and the output of the coil section 7 is supplied to the transmission / reception circuit 13. The transmission / reception circuit 13 demodulates this data, rectifies the carrier wave of the transmitted data, and forms a power supply. This power is supplied to the CPU 11, the memory 12, and the transmission / reception circuit 13. The data demodulated by the transmission / reception circuit 13 is stored in the memory 12 under the control of the CPU 11.

When data is output from the circuit section 6 in the optical disk 1 to an external circuit, the data from the memory 12 is read out under the control of the CPU 11. This data is supplied to the transmission / reception circuit 13. Transmitter / receiver circuit 13
Then, this data is modulated. The output of the transmission / reception circuit 13 is supplied to the coil unit 7. Since the coil unit 7 and the coil unit 25 are coupled, the output of the coil unit 7 is transmitted to the coil unit 25, and the output of the coil unit 25 is supplied to the transmission / reception circuit 24. The transmitted / received circuit 24 demodulates the transmitted data. The demodulated data is transmitted / received by the transmission / reception circuit 2
4 to the CPU 21.

As described above, in the optical disc to which the present invention is applied, the circuit portion 6 including the CPU 11, the memory 12, the transmission / reception circuit 13, and the power supply circuit 14 is provided inside the optical disc 1.
And the coil portion 7 are embedded. Then, data can be input / output without contact with an external circuit. Since the circuit portion 6 and the coil portion 7 are embedded in the optical disc 1, the outer shape of the disc does not change, and compatibility can be maintained. Further, since data can be input / output to / from the outside in a contactless manner, reliability is improved.

In the above example, the circuit section 6 and the coil section 7 are arranged in the area A2 on the inner circumference side of the disk, but the circuit section 6 and the coil section 7 are arranged in the area A3 on the outer circumference side of the disk. May be provided.

[0022]

According to the present invention, an optical disc is formed by laminating two discs, and between the two discs, a circuit portion including a CPU, a memory, a transmission / reception circuit, and a power supply circuit, and a circuit portion. And the coil portion derived from the. Since the circuit portion and the coil portion are embedded in the disc, the outer shape of the disc does not change and compatibility is maintained. Further, the coil portion embedded in the optical disc and the coil portion of the external circuit are arranged so as to face each other and are coupled to each other. Therefore, it is possible to input / output data without contact between the internal circuit section of the optical disc and the external circuit section.
Since the rotation axis of the coil section embedded in the optical disk is the same as the rotation axis of the disk, the coupled state with the coil section of the external circuit is kept stable even while the disk is rotating. Be drunk

[Brief description of drawings]

FIG. 1 is a plan view used for explaining an optical disc to which the present invention is applied.

FIG. 2 is a sectional view used for explaining an optical disc to which the present invention is applied.

FIG. 3 is a sectional view used for explaining an optical disc to which the present invention is applied.

FIG. 4 is a block diagram used for explaining an optical disc to which the present invention is applied.

FIG. 5 is a block diagram used for explaining an optical disc to which the present invention is applied.

FIG. 6 is a block diagram used for explaining an optical disc to which the present invention is applied.

[Explanation of symbols]

1 ... Optical disc, 1A, 1B ... Disc, 6 ...
..Circuit part, 7 ... Coil part

Claims (2)

[Claims] 1. An optical disc having a first signal recording surface and a second signal recording surface, wherein the first signal recording surface and the second signal recording surface are bonded together. A memory in which information relating to the disc is recorded between the signal recording surface 1 and the second signal recording surface;
An optical disc comprising an input / output unit for inputting / outputting information to / from the memory in a contactless manner. 2. The optical disk according to claim 1, wherein the input / output unit is formed of a coil having a central axis that is the same as the central axis of the disk.