Image forming apparatus

Details Image forming apparatus Image forming apparatus

1993-01-19

1994-05-31

Grimley, A. T.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

346108, 355245, 355268, G01D 1514

Patent

active

053173473

ABSTRACT:
An image forming apparatus which comprises a light shutter disposed between a source of light and an image carrier, which is electrostatically charged to a predetermined polarity, and capable of exhibiting a light transmissivity which varies according to a voltage applied to the light shutter. A first voltage of a predetermined direction is applied to the light shutter according to image information during a first period in which a first area of the image carrier passes across the light shutter, to form the electrostatic latent image on the image carrier. This electrostatic latent image is subsequently developed into a toner image. In order to substantially recover the light shutter from a light-induced fatigue, i.e., internal polarization of an electro-optical material forming the light shutter, a second voltage of a direction counter to the predetermined direction is applied to the light shutter during a second period in which a second area of the image carrier passes across the light shutter.

REFERENCES:
patent: 4154505 (1980-05-01), Kato et al.
patent: 4591886 (1986-05-01), Umeda et al.
patent: 4902111 (1990-02-01), Matsubara et al.
patent: 5025288 (1991-06-01), Kusuda

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