Image reading apparatus

Details Image reading apparatus Image reading apparatus

1984-11-16

1986-01-28

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358213, 358221, 250206, H04N 140

Patent

active

045675279

ABSTRACT:
An image reading device, comprising a circuit for adding a correction voltage to the output voltage of a solid-state imaging device and a circuit for maintaining the correction voltage so as to obtain a video signal of a constant voltage level for a given image density.

REFERENCES:
patent: 3845242 (1974-10-01), Richeson, Jr. et al.
patent: 4001502 (1977-01-01), van Roossel
patent: 4217608 (1980-08-01), MacGregor et al.
patent: 4225883 (1980-09-01), Van Atta et al.
patent: 4293877 (1981-10-01), Tsunekawa et al.
Jeremiah M. Morgan, "Automatic Black Level Hold for Television Camera Amplifier", RCA Technical Notes, No. 257, Jun. 1959.

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