Image pickup device with reduced fixed pattern noise

Details Image pickup device with reduced fixed pattern noise Image pickup device with reduced fixed pattern noise

1986-10-31

1989-08-15

Coles, Sr., Edward L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

35821318, 35821326, 35821328, 35821331, H04N 9077, H04N 315, H04N 5335

Patent

active

048579963

ABSTRACT:
An image pickup device for generating three pulses 120 degrees out of phase with one another and having the same period, to clamp, sample and hold, and reset an image signal output from an image pickup element. The pulse width of the sample and hold pulse is less than one third of the period. The image signal is read from the image pickup element using three transfer pulses 120 degrees out of phase with one another and having the same period. Each of the transfer pulses is less in width than one third of the period, and also serves as a timing signal for sampling and holding the image signal. In one embodiment, the image pickup device may have three read-out devices for reading out three horizontal lines at one time (not, however, in phase), with a separate train of transfer pulses being used for each of the three lines.

REFERENCES:
patent: 3781574 (1973-12-01), White et al.
patent: 4075514 (1978-02-01), Sequin
patent: 4274113 (1981-06-01), Ohba et al.
patent: 4513313 (1985-04-01), Kinoshita et al.
patent: 4549215 (1985-10-01), Levine
patent: 4652766 (1987-03-01), Wang et al.
patent: 4656503 (1987-04-01), Hynecek

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