Image forming apparatus

Details Image forming apparatus Image forming apparatus

1985-04-12

1986-04-08

Goldberg, E. A.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

350356, G02F 103

Patent

active

045816190

ABSTRACT:
An image forming apparatus comprises an exposure light source, an image bearing member and a printer head interposed therebetween. The printer head has a micro-shutter array which comprises a plurality of micro-shutters arranged in a matrix comprising a plurality of rows and a plurality of columns. Each micro-shutter comprises a first electrode connected to a terminal of a thin film transistor, a second electrode forming a common electrode and a liquid crystal interposed therebetween. On the first electrode is further provided an opposing conductor film through an insulating film, whereby a charge storage capacitor is formed. Because of the charge storage capacitor, an effective voltage applied across the liquid crystal is kept at a high level, whereby an optical signal with good contrast is given to the image bearing member even when the printer head is driven according to a high degree of time-division scheme.

REFERENCES:
patent: 4391490 (1983-07-01), Hartke
patent: 4458989 (1984-07-01), Tschang

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