Copying machine exposure adjustment device

Details Copying machine exposure adjustment device Copying machine exposure adjustment device

1986-02-18

1987-10-13

Grimley, Arthur T.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 68, 355 69, G03G 1504

Patent

active

046995021

ABSTRACT:
A copying machine exposure adjustment device, including an operation panel that converts user operations into digital signals, a digital operation circuit that processes operational data from the operation panel and computes exposure data, a D/A converter that converts exposure data sequentially transmitted from the digital operation circuit into analog exposure data, a copy-lamp control circuit that adjusts the light volume of a copying lamp in response to the exposure data from the D/A converter, an image density circuit that detects light reflected from the original document, and a data correction circuit that corrects the exposure data from the D/A converter in response to the image density data from the image density detector circuit while the automatic exposure mode is in operation.

REFERENCES:
patent: 4124294 (1978-11-01), Nakamura
patent: 4361395 (1982-11-01), Washio et al.
patent: 4436410 (1984-03-01), Komiya
patent: 4474453 (1984-10-01), Yanagawa et al.
patent: 4474460 (1984-10-01), Suzuki
patent: 4527093 (1985-07-01), Yamauchi et al.
patent: 4573787 (1986-03-01), Sanbayashi et al.
patent: 4583839 (1986-04-01), Suzuki

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