Display system, display method, display program, display control method and display apparatus

A display system comprising:

• a display apparatus that displays thereon file data and is selected from a group consisting of sheets of electronic paper, flexible displays, sheets of rewritable paper, paper-like displays, sheets of digital paper, electronic sheets, and electronic display sheets;
• an information processing apparatus that enables a user to view or edit the file data displayed on the display apparatus;
• a power feeding apparatus that feeds power to the display apparatus by generating a magnetic field within a predetermined range;
• and
• a power feeding control section that detects a variation in a state of the magnetic field generated by the power feeding apparatus, wherein
• the display apparatus includes:
• a file identifier storing section that stores thereon a file identifier identifying the file data;
• a viewing and editing information storing section that stores thereon viewing and editing information which indicates a type of viewing or editing which is permitted to be performed on the file data identified by the file identifier stored on the file identifier storing section;
• a first display section that displays thereon the file data identified by the file identifier stored on the file identifier storing section;
• a first communicating section that transmits, to the information processing apparatus, the file identifier stored on the file identifier storing section and the viewing and editing information stored on the viewing and editing information storing section;
• and
• a power receiving section that receives the power from the magnetic field generated by the power feeding apparatus, and
• when the display apparatus is placed within the predetermined range so that the power receiving section receives the power, the first communicating section uses the received power to transmit, to the information processing apparatus, the file identifier stored on the file identifier storing section and the viewing and editing information stored on the viewing and editing information storing section;
• the information processing apparatus includes:
• a second communicating section that receives the file identifier stored on the file identifier storing section and the viewing and editing information stored on the viewing and editing information storing section;
• a file data obtaining section that obtains the file data identified by the file identifier received by the second communicating section;
• a viewing and editing instruction obtaining section that obtains one or more instructions issued by the user to view or edit the file data;
• a viewing and changing permitting section that refers to the viewing and editing information received by the second communicating section, and when the file data obtained by the file data obtaining section is permitted to be viewed or edited, gives permission to view or change contents of the file data based on the viewing or editing instructions obtained by the viewing and editing instruction obtaining section;
• and
• a viewing and changing prohibiting section that refers to the viewing and editing information received by the second communicating section, and, when the file data obtained by the file data obtaining section is not permitted to be viewed or edited, prohibits viewing or changing the contents of the file data;
• and
• the viewing and editing information storing section stores thereon, as the viewing and editing information, and editing-permitted portion of the file data displayed on the display apparatus and identified by the file identifier stored on the file identifier storing section, whose contents are permitted to be changed;
• the first communicating section transmits, as the viewing and editing information, the editing-permitted portion stored on the viewing and editing information storing section;
• the second communication section receives, as the viewing and editing information, the editing-permitted portion stored on the viewing and editing information storing section;
• the viewing and changing permitting section gives permission to change the contents of the file data in the editing-permitted portion received by the second communicating section based on the editing instructions obtained by the viewing and editing instruction obtaining section;
• and
• the viewing and changing prohibiting section prohibits changing the contents of the file data in a portion other than the editing-permitted portion received by the second communicating section based on the editing instructions obtained by the viewing and editing instruction obtaining section.