Patent ID: 8065612

Claim:
A display system comprising: a display apparatus that displays thereon file data; and a first information processing apparatus that manages editing or viewing of the file data by a user, wherein the display apparatus comprising: a file identifier storing section that stores thereon a file identifier identifying the file data; a display's communicating section that transmits the file identifier stored on the file identifier storing section to the first information processing apparatus, and receives the file data identified by the file identifier stored on the file identifier storing section; and a display's display section that displays thereon the file data received by the display's communicating section, and the first information processing apparatus comprising: a first file data obtaining section that obtains the file data identified by the file identifier transmitted from the display's communicating section, and transmits the obtained file data to the display apparatus; a first file data opening control section that opens the file data obtained by the first file data obtaining section to enable the user to edit or view the file data; a first file data closing control section that closes the file data which has been opened by the first file data opening control section to prohibit the user from editing or viewing the file data, when no access is made to the file data which has been opened by the first file data opening control section for a predetermined first time period; and a processing's communicating section that receives the file identifier which is stored on the file identifier storing section and transmitted from the display's communicating section, wherein the display's communicating section transmits the file identifier stored on the file identifier storing section at intervals of a predetermined second time period only when the display apparatus is positioned within a predetermined range, and wherein the first file data closing control section closes the file data which has been opened by the first file data opening control section if the processing's communicating section does not receive the file identifier from the display's communicating section for a predetermined third time period which is longer than the second time period.