Image sensor with expanding dynamic range

Details Image sensor with expanding dynamic range Image sensor with expanding dynamic range

2004-12-23

2010-02-23

Epps, Georgia Y (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C257S292000, C348S243000

Reexamination Certificate

active

07667172

ABSTRACT:
A conventional image sensor has a narrow dynamic range, so that the conventional image sensor has the limitation of not representing very dark portions or very bright portions depending on the exposure time when representing an image having such dark and bright portions. The present invention provides an image sensor including at least two storage units for respectively storing at least two image signals; a first switch unit for performing switching applied image signals to be respectively stored in the at least two storage units; and a second switch unit respectively connected to the at least two storage units and for equalizing the image signals stored in the at least two storage units.

REFERENCES:
patent: 5471515 (1995-11-01), Fossum et al.
patent: 5801773 (1998-09-01), Ikeda
patent: 07135599 (1995-05-01), None
patent: 10-2004-0011064 (2004-02-01), None
patent: WO 02-076090 (2002-09-01), None

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