Title:
STATE MONITORING DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/054199
Kind Code:
A1
Abstract:
A state monitoring device (100) is mounted in a vehicle (1) and monitors the state of a driver using a face image (50) of the driver. The state monitoring device emits light toward a defined area (PA) from a light emitting unit (15), and receives light reflected by the face of the driver by an image pickup unit (10), the face of the driver being assumed to be located in the defined area. A control circuit (20) of the state monitoring device adjusts the gradation level of the face image by changing the length of an exposure period in which an image pickup element (11) of the image pickup unit is maintained in an exposed state. Further, the control circuit controls light emission of the light emitting unit such that light emission luminance at the start (t_es) of the exposure period increases as the exposure period of the image pickup element is shortened.
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Inventors:
OMI TAKUHIRO (JP)
Application Number:
PCT/JP2013/003045
Publication Date:
April 10, 2014
Filing Date:
May 13, 2013
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
H04N5/238; B60R11/04; G03B15/00; G03B15/03; G03B15/05; H04N5/225; H04N5/232
Foreign References:
| JP2010215000A | 2010-09-30 | |||
| JP2006311345A | 2006-11-09 | |||
| JP2011142500A | 2011-07-21 |
Attorney, Agent or Firm:
KIN, Junhi (JP)
Gold Junki (JP)
Gold Junki (JP)
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