Patent ID: 9460601
Filing Date: 2016-10-04
CPC Classification: G08B

Claim Text:
1. A method for a driver drowsiness warning and accident avoidance system for a vehicle, comprising the steps of: a) determining speed of said vehicle; b) calculating a maximum allowed drowsiness time in accordance with speed of said vehicle and allowed drowsiness travel distance; c) determining a score of confidence of detecting driver's face and facial features; d) determining driver's level of the driver's left eye closed and the driver's right eye closed, if said score is larger than a first threshold value; e) calculating level of eyes closed as maximum of said driver's left eye closed level and said driver's right eye closed level; f) filtering said calculated level of eyes closed; g) issuing a driver drowsiness alarm, if said filtered calculated level of eyes closed exceed a second threshold value persist longer than said maximum allowed drowsiness time; and h) illuminating the driver's face with approximately 460 nm dim blue light to increase alertness of driver when said driver drowsiness alarm is issued at night time.