Original reading apparatus applying a lamp voltage to correct la

Details Original reading apparatus applying a lamp voltage to correct la Original reading apparatus applying a lamp voltage to correct la

1988-05-25

1990-09-18

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

H04M 104

Patent

active

049582402

ABSTRACT:
An original reading apparatus which prevents lamp blackening includes a lamp for illuminating the original, and reading circuitry for reading an image formed on the illuminated original. Control circuitry is provided to apply to the lamp a first predetermined voltage after reading the image formed on the original has been completed, if a voltage applied to the lamp at the time of original image reading is lower than a second predetermined voltage. The first predetermined voltage is higher than the voltage applied to the lamp at the time of the original image reading.

REFERENCES:
patent: 3833761 (1974-09-01), Houck
patent: 4677287 (1987-06-01), Ejima
patent: 4688099 (1987-08-01), Funston
patent: 4700236 (1987-10-01), Abe
patent: 4796093 (1989-01-01), Asano

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