Photography – With object illumination for exposure – Exposure control circuit with illumination mode
Reexamination Certificate
2006-09-01
2010-02-16
Mahoney, Christopher E (Department: 2862)
Photography
With object illumination for exposure
Exposure control circuit with illumination mode
C396S180000, C348S371000
Reexamination Certificate
active
07664387
ABSTRACT:
A communications apparatus is shown having an imaging device for capturing an image, and a flash for lighting an image to be captured. Also shown is the use of the apparatus. Software for matching a flash performance to other functions of a device is also shown. A radio communications apparatus embodiment is shown that comprises an imaging device including an image sensor and a rolling shutter, and a flash unit. The flash unit is operated at a certain flash frequency, and an exposure time is determined according to the flash frequency so that the image sensor is uniformly exposed by the rolling shutter during the determined exposure time.
REFERENCES:
patent: 6167199 (2000-12-01), Fukui
patent: 6748165 (2004-06-01), Ogasawara
patent: 7428378 (2008-09-01), Warpakowski Furlan
patent: 2003/0117491 (2003-06-01), Avni et al.
patent: 2004/0223075 (2004-11-01), Furlan et al.
“Geometric Models of Rolling-Shutter Cameras” by Christopher Geyer, et al, EECS Department, University of California, Berkeley, pp. 1-8, date unknown.
Alakarhu Juha
Perälä Mikko
Chang Fang-Chi
Mahoney Christopher E
Nokia Corporation
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