Drowsy state determination device and method

Details Drowsy state determination device and method Drowsy state determination device and method

2008-07-24

2010-11-09

Bugg, George A (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S575000

Reexamination Certificate

active

07830266

ABSTRACT:
A blink detection section generates an eye-closure signal indicating the duration of a period for which the driver closes his/her eyes. An eye-closure count section calculates the respective occurrence frequencies of single eye closures in a prescribed measurement period for a first eye-closure period threshold and a second eye-closure period threshold, based on the eye-closure signal and the respective eye-closure period thresholds. A drowsy state determination section compares the respective occurrence frequencies with the first eye-closure frequency threshold and the second eye-closure frequency threshold to determine which of the drowsiness levels corresponding to the respective thresholds the drowsiness level of the driver is at.

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