Optical disc

Abstract

An optical disc according to the present invention includes a plurality of recording layers; a receiving section for receiving, from outside an optical disc, a switching instruction for switching a target layer to be targeted for recording or reproducing information among the plurality of the recording layers; and a switching section for switching the target layer among the plurality of recording layers, based on the switching instruction received.

The invention claimed is: 
     
       1. An optical disc comprising:
 a plurality of recording layers;   a receiving section for receiving, from outside the optical disc, a switching instruction for switching a target layer to be targeted for recording/reproducing information among the plurality of the recording layers; and   a switching section for switching the target layer among the plurality of recording layers, based on the received switching instruction, wherein the switching section includes a signal generation section generating three switching signals for switching the target layer.   
     
     
       2. An optical disc according to  claim 1 , further comprising a plurality of conducting layers,
 wherein each of the plurality of conducting layers is provided adjacent to at least one corresponding recording layer of the plurality of recording layers, and   the switching section adjusts voltages being applied to each of the plurality of conducting layers so as to switch the target layer.   
     
     
       3. An optical disc according to  claim 1 , wherein the receiving section receives the switching instruction through a radio communication from outside the optical disc. 
     
     
       4. An optical disc according to  claim 1 , further comprising a power supply section for supplying power to the switching section. 
     
     
       5. An optical disc according to  claim 4 , wherein the power supply section receives power through a radio communication with outside the optical disc. 
     
     
       6. An optical disc according to  claim 1 , further comprising a substrate on which the plurality of recording layers are provided,
 wherein a hole is formed on the substrate, and   the receiving section and the switching section are embedded into the hole.   
     
     
       7. An optical disc according to  claim 1 , further comprising a substrate on which the plurality of recording layers are provided and an integrated circuit section including the receiving section and the switching section,
 wherein a hole is formed on the substrate, and   the integrated circuit section is embedded into the hole.   
     
     
       8. An optical disc according to  claim 1 , wherein at least a portion of the plurality of the recording layers is switched between an active state and a non-active state in response to whether an activation signal output from the switching section is applied thereto or not,
 the optical disc further includes a predetermined region with an active state when no activation signal is applied, and   property information indicating properties of the optical disc is recorded on the predetermined region.   
     
     
       9. An optical disc according to  claim 8 , wherein the predetermined recording region is in an active state regardless of presence of the activation signal. 
     
     
       10. An optical disc including:
 a plurality of recording layers,   wherein at least a portion of the plurality of the recording layers is switched between an active state and a non-active state in response to whether an activation signal is applied thereto or not, wherein the activation signal is generated from the optical disc,   the optical disc further includes a predetermined recording region with an active state when no activation signal is applied.   
     
     
       11. An optical disc according to  claim 10 , including a first region on which the plurality of the recording layers are provided and a second region on which one recording layer is provided,
 wherein the second region includes the predetermined recording region.   
     
     
       12. An optical disc according to  claim 10 , wherein property information indicating properties of the optical disc is recorded on the predetermined recording region. 
     
     
       13. An optical disc according to  claim 10 , wherein the predetermined recording region is in an active state regardless of presence of the activation signal. 
     
     
       14. An optical disc according to  claim 10 , wherein the predetermined recording region is in a non-active state when the activation signal is applied thereto. 
     
     
       15. A mobile communication device for conducting wireless communication with an external relay device connected to an external server through the Internet and for conducting near field communication with an external terminal in a modulation method which is different from a modulation method for the wireless communication, comprising:
 an information processing section;   a first communication section for conducting near field communication with an external terminal, which is external to the mobile communication device, upon receipt of an instruction from the information processing section, to receive, from the external terminal, terminal information including identification information of the external terminal stored in a storage section of the external terminal, wherein the identification information identifies the external terminal;   a second communication section for transmitting the identification information received by the first communication section to the server through the relay device and the Internet, and for receiving related information including coded motion pictures having a plurality resolutions, which is related to identification information, that is stored in a storage section of the server, through the Internet and the relay device from the server;   a motion picture decoder for decoding the coded motion picture to generate a motion picture having a resolution lower than a predetermined resolution from the plurality of resolutions and corresponding to the identification information included in the terminal information received by the first communication section, the related information being stored in the server; and   a display section for displaying the motion picture generated by the motion picture decoder.    
     
     
       16. A mobile communication device according to claim 15, wherein the near field communication by the first communication section uses a frequency band in the neighborhood of 13.5 MHz.  
     
     
       17. A mobile communication device according to claim 15, wherein the mobile communication device supplies electric power to the external terminal through the near field communication, and wherein, due to the electric power, the terminal information is read from the storage section of the external terminal and the terminal information is sent to the mobile communication device.