Optical writing device with controlled driving voltages

Details Optical writing device with controlled driving voltages Optical writing device with controlled driving voltages

1999-07-22

2000-09-26

Pendegrass, Joan

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

347136, 347236, 349 3, 359239, 359245, G06F 103, G03G 1504

Patent

active

06124872&

ABSTRACT:
Disclosed is an optical writing device having an array of a plurality of writing light shutter elements for an image forming purpose. The optical writing device also has at least one first monitoring light shutter element and at least one second monitoring light shutter element. During recording period, the first second monitoring light shutter element is frequently driven, and the second monitoring light shutter element is infrequently driven. After the recording period, the first and second monitoring light shutter elements are driven with varying voltage, and light amounts from the first and second monitoring light shutter elements are sensed by a sensor. Based on the output from the sensor, optimal drive voltage for the next recording period is set.

REFERENCES:
patent: 5247387 (1993-09-01), Matsubara et al.

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