Horology: time measuring systems or devices – Combined with disparate device
Patent
1998-06-17
1999-06-29
Miska, Vit
Horology: time measuring systems or devices
Combined with disparate device
368 82, 345 99, 345211, G04B 4700, G09G 336
Patent
active
059177772
ABSTRACT:
In an apparatus for control operating time of information display means, a program is operated by a first system clock, which has a pre-established period, a second system clock, which has an error in its period, being used to operate a timer, the amount of time until the generation of a timer interrupt request being measurement by the program which is operated by a first system clock, and the oscillation frequency of the second system clock being calculated from the results of that measurement. The number of timer interrupt request signals to be counted and the number of the wait program to be executed are set based on the oscillation frequency of the second system clock, this number of timer interrupt request signals being counted, and the set number of the wait program being executed, so as to perform fine adjustment.
REFERENCES:
patent: 5610627 (1997-03-01), Inamori et al.
patent: 5751278 (1998-05-01), Inamori et al.
Miska Vit
NEC Corporation
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