Television – Camera – system and detail – Solid-state image sensor
Patent
1996-03-20
1998-08-18
Faile, Andrew I.
Television
Camera, system and detail
Solid-state image sensor
348315, 257231, 257232, H04N 314
Patent
active
057964335
ABSTRACT:
A multiple-frame image sensor comprising a full-frame CCD sensor of two-story construction having an overlying photosensitive layer that converts input radiation to electric charge and an underlying CCD structure which functions to collect and store the charge for read-out of more than one charge packet per pixel, with the pixels being of minimum size. The sensor structure is rendered capable of handling more than one photosignal charge packet per pixel in an area-efficient way through the use of ripple clocking, so that in a preferred embodiment a 4-poly, 7-phase ripple-clocked vertical CCD register is fabricated with 7 gates, one of which is run vertically to create openings, e.g., between the 1 and 6 gates, that pass electrode contacts to N+ sources in the channel stops of the register to form photosignal charge packets in the region between the stops. The ripple-gating controls the movement of the charge packets for storage along the CCD channel until 3 charge packet read-out. In this two-story embodiment, there is no mixing of signal charge from the several exposures. Other embodiments involving 3- and 2-poly designs, MPP barriers, and 5-phase ripple-clocking and 6-electrode non-ripple clocking are described.
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Faile Andrew I.
Loral Fairchild Corp.
Nguyen Luong
LandOfFree
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