Image reading apparatus

Details Image reading apparatus Image reading apparatus

1988-04-20

1989-05-16

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

35821331, 358293, H04N 104

Patent

active

048314609

ABSTRACT:
An image reading apparatus having a solid state pick-up device for receiving light reflected from an image that is irradiated by a light source supplied with AC power. The image reading apparatus includes a zero cross pulse generating circuit that is supplied by an AC supply voltage and a received light amount detection starting time setting device which sets the delay time for a specified period of time from the generation of a pulse by the zero cross pulse generating circuit relating to the time for the solid state pick-up device to start detecting the quantity of light received. The image reading apparatus synchronizes this timing to ensure that an image is irradiated with a constant quantity of light.

REFERENCES:
patent: 4250526 (1981-02-01), Fuwa
patent: 4331914 (1982-05-01), Huber
patent: 4463284 (1984-07-01), Tamura et al.
patent: 4624547 (1986-11-01), Endo et al.
patent: 4636081 (1987-01-01), Saitoh
patent: 4639608 (1987-01-01), Kuroda
patent: 4658302 (1987-04-01), Sakamoto
patent: 4737857 (1988-04-01), Rucci

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