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Basic of electronic shutter
1. Global shutter
Complete global shutter action
As scanning time is longer in lower part of image, black floating phenomenon
might be caused by dark current effect. ＝This can be corrected as it is slight
2. Global shutter
Global shutter mode can reduce an effect of time difference during reading by
resetting on each line
In some cases, effect of virtual global reset is achieved by high speed rolling
reset
3. Rolling shutter
As only resetting is done in one time, exposure time after reset varies on each
line.
＝The lower part of image is the brighter as exposure time is longer.
4. Rolling shutter
Complete Rolling shutter action
Stable exposure process as both reset and shutter are rolling mode
Easier to make low noise type sensor as structure of less pixel transistor number.
As disadvantage, motion image shot under continuous light will be distortive.
Copyright © 2015 TOSHIBA TELI CORPORATION, All rights reserved.
+ global reset
+ rolling reset
+ global reset
+ rolling reset
(combination of shutter and reset)
Doc. No. 4300-0223
2015/12/25
28
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