| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide techniques for accurately detecting that an object to be browsed has been browsed. <P>SOLUTION: A display device 1 changes the display mode of the object to be browsed which has been displayed on a display part 11 with time by a visibility decreasing function of a display control part 12 to decrease the visibility of the display. When a restoration instruction reception part 13 receives an instruction from a user in a state where the visibility of the display is decreased, the display mode of the object to be browsed is put back by a visibility restoring function of the display control part 12 to restore the visibility of the display; a restoration detecting part 14 detects the execution of the visibility restoring function; and a browsing state recording part 20 records a detection result by regarding the execution of the visibility restoring function as detection of browsing. <P>COPYRIGHT: (C)2009,JPO&INPIT |
