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METHOD OF INFORMATION SECURITY 



Patent Number: 
Publication date: 
Inventor(s): 
Applicant(s):: 
Requested Patent: 

Application 
Priority Number(s): 
IPC Classification: 
EC Classification: 
Equivalents: 



JP9305155 



1997-11-28 

YAMAMOTO OSAMU; NAGASHIMA KENICHI 
HITACHI LTD 

r JP9305155 



JP199601 17678 19960513 



G09G5/00;G06F3/14 



Abstract 



PROBLEM TO BE SOLVED: To recognize whether or not a screen saver returns against user's intention. 
SOLUTION: When in is detected that there is no input from an input device during a set time for a screen save 
(step 102), a display on a display device 15 is set to a screen saver display (step 103). When it is detected (step 
104) that there is an input from the input device after the screen saver is started, the screen saver display of the 
display device 15 is returned to an original display, and one is added to a counter 16, and the time of the return 
measured by a timer is stored in a storage device 18 (step 105). A mixer 19 mixes the frequency of returns with 
the original display (step 106) and display them on the display device 15 (step 107). 



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