Television – Camera – system and detail – With object or scene illumination
Reexamination Certificate
2006-10-31
2006-10-31
Srivastava, Vivek (Department: 2622)
Television
Camera, system and detail
With object or scene illumination
C396S173000
Reexamination Certificate
active
07129983
ABSTRACT:
The invention is based on a method for controlling a flash unit in connection with a digital image sensor without a mechanical shutter, wherein the exposure of the image sensor is performed in sub-areas, such as pixel rows or columns, or in another order, by using a rolling electronic shutter or the like. Thus, the exposure of said sub-areas of the image sensor takes place at least partly at different times. According to the invention, during the time of exposure of one image, i.e. substantially all the sub-areas of the image sensor, several discrete, successive flashes of the flash unit are used to achieve even exposure of the image area, which the flashes are timed in such a way that each single flash is triggered at a point of time which is common to the integration or exposure time of as many successive sub-areas of the image sensor as possible. According to the invention, the successive light flashes are also timed in such a way that one and only one flash of the flash unit occurs during the integration or exposure time of each single sub-area. By the present invention, the significant advantage is attained that the invention minimizes the number of light flashes required for one image while it also secures that each sub-area of the sensor to be exposed at a different time is illuminated as evenly as possible.
REFERENCES:
patent: 4284333 (1981-08-01), Kawamura et al.
patent: 5752097 (1998-05-01), McIntyre
patent: 6278490 (2001-08-01), Fukuda et al.
patent: 6404987 (2002-06-01), Fukui
patent: 6584283 (2003-06-01), Gabello et al.
patent: 6654062 (2003-11-01), Numata et al.
patent: 6856356 (2005-02-01), Kahn
patent: 2002/0080254 (2002-06-01), Parulski
patent: 2003/0030744 (2003-02-01), Baer
patent: 2003/0062582 (2003-04-01), Blerkom
patent: 2004/0223075 (2004-11-01), Furlan et al.
patent: 2005/0057674 (2005-03-01), Krymski et al.
patent: 0989741 (2000-03-01), None
patent: 001263215 (2002-04-01), None
patent: 09312799 (1997-12-01), None
patent: 2000196951 (2000-07-01), None
patent: 2000262677 (2000-09-01), None
patent: 9905853 (1999-02-01), None
Rantanen Henry
Yrjänäinen Jukka
Fressola Alfred A.
Misleh Justin
Nokia Corporation
Srivastava Vivek
Ware Fressola Van Der Sluys & Adolphson LLP
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