US Patent No: 5,786,765

Number of patents in Portfolio can not be more than 2000

Apparatus for estimating the drowsiness level of a vehicle driver

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Importance

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Abstract

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An apparatus for estimating a drowsiness level of a vehicle driver first prepares a frequency distribution of blink durations of the driver for a first predetermined period after the start of a driving operation, and sets a threshold value for a discrimination of slow blinks by the frequency distribution. Thereafter, the apparatus calculates, every second predetermined period, a ratio of the number of slow blinks to the total number of blinks of the driver's eyes during the second period, and discriminates a rise in the drowsiness level of the driver in accordance with the calculated ratio.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MITSUBISHI JIDOSHA KOGYO K.K. (A.K.A. MITSUBISHI MOTORS CORPORATION)TOKYO1173

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Goi, Yoshihiro Anjo, JP 2 39
Hara, Toru Okazaki, JP 8 57
Kumakura, Sae Okazaki, JP 1 36

Cited Art Landscape

Patent Info (Count) # Cites Year
 
MITSUBISHI DENKI KABUSHIKI KAISHA (2)
4,725,824 Doze prevention system 44 1986
5,573,006 Bodily state detection apparatus 21 1994
 
Honeywell Inc. (1)
4,397,531 Eye closure discrimination system 17 1981
 
MAZDA MOTOR CORPORATION (1)
5,311,877 Waking degree maintaining apparatus 28 1992
 
Omron Tateisi Electronics Co. (1)
4,953,111 Doze detector 34 1988
 
SIEMENS CORPORATION;INTELLECTUAL PROPERTY DEPARTMENT (1)
5,570,698 System for monitoring eyes for detecting sleep behavior 46 1995
 
Other [Check patent profile for assignment information] (1)
5,689,241 Sleep detection and driver alert apparatus 162 1996

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
DELPHI TECHNOLOGIES, INC. (3)
6,927,674 Vehicle instrument cluster having integrated imaging system 1 2002
7,202,792 Drowsiness detection system and method 16 2002
7,528,731 System and method for mitigating drive distraction and/or drowsiness by illuminated windshield wiper 2 2005
 
FUJI JUKOGYO KABUSHIKI KAISHA (3)
7,034,697 Awakening level estimation apparatus for a vehicle and method thereof 5 2003
7,084,773 Wakefulness estimating apparatus and method 3 2004
7,403,124 Driving support equipment for vehicles 6 2006
 
ADVANCED BRAIN MONITORING, INC. (2)
6,496,724 Method for the quantification of human alertness 49 1999
6,625,485 Method for the quantification of human alertness 27 2002
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (2)
8,666,644 Drive assistance apparatus 0 2008
8,791,825 Biological state determination device 0 2010
 
VOLVO TECHNOLOGY (CORPORATION) (2)
6,974,414 System and method for monitoring and managing driver attention loads 24 2003
7,460,940 Method and arrangement for interpreting a subjects head and eye activity 19 2003
 
7352867 CANADA INC. (1)
8,570,176 Method and device for the detection of microsleep events 0 2008
 
COMPUMEDICS LIMITED (1)
8,096,946 Vigilance monitoring system 7 2003
 
DENSO CORPORATION (1)
7,705,738 Database apparatus, attention calling apparatus and driving support apparatus 4 2008
 
FORD GLOBAL TECHNOLOGIES, LLC (1)
7,138,922 Drowsy driver monitoring and prevention system 5 2003
 
Hyudai Motor Japan R&D Center, Inc. (1)
7,868,771 Doze-off warning apparatus for vehicle 0 2008
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
6,236,968 Sleep prevention dialog based car system 87 1998
 
NEC CORPORATION (1)
7,839,292 Real-time driving danger level prediction 1 2007
 
OMRON CORPORATION (1)
7,551,987 Illuminating apparatus, image capturing apparatus, and monitoring apparatus, for vehicle driver 0 2006
 
PNI CORPORATION (1)
6,297,732 Radar/laser detection device with multi-sensing and reporting capability 45 1999
 
RAMSLE TECHNOLOGY GROUP GMBH, LLC (1)
6,097,295 Apparatus for determining the alertness of a driver 36 1999
 
SAMSUNG ELECTRONICS CO., LTD. (1)
8,055,016 Apparatus and method for normalizing face image used for detecting drowsy driving 0 2006
 
SEEING MACHINES PTY LTD (1)
7,043,056 Facial image processing system 132 2003
 
SLEEP DIAGNOSTICS PTY LTD (1)
7,791,491 Measuring alertness 3 2006
 
SPHERICON LTD. (1)
6,756,903 Driver alertness monitoring system 14 2001
 
U.S. DISTRICT COURT, SO. DIST. FL (1)
6,304,187 Method and device for detecting drowsiness and preventing a driver of a motor vehicle from falling asleep 31 2000
 
UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC. (1)
6,927,694 Algorithm for monitoring head/eye motion for driver alertness with one camera 41 2002
 
VOLVO CAR CORPORATION (1)
6,614,344 Optical sensor for an adjustable vehicle seating system 12 2000
 
VOLVO TECHNOLOGY CORPORATION (1)
7,639,148 Method and arrangement for controlling vehicular subsystems based on interpreted driver activity 14 2004
 
WILLIAM J. BROWN, ESQ., TRUSTEE FOR JOSEPH D. HARBAUGH (1)
6,717,518 Method and apparatus for detection of drowsiness 43 2001
 
Other [Check patent profile for assignment information] (5)
6,147,612 Dual function optic sleep preventing device for vehicle drivers 18 1999
7,336,804 Method and apparatus for detection of drowsiness and quantitative control of biological processes 9 2003
7,258,441 Eye activity monitoring apparatus and system 0 2004
7,301,465 Drowsy driving alarm system 5 2005
7,680,302 Method and apparatus for detection of drowsiness and quantitative control of biological processes 0 2007