Timings of rotational speed in a laser beam printer

Details Timings of rotational speed in a laser beam printer Timings of rotational speed in a laser beam printer

1995-12-21

2000-05-16

Metjahic, Safet

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347235, B41J 247, B41J 2435

Patent

active

060644192

ABSTRACT:
A laser beam printer which detects the position of a laser beam in order to scan a photosensitive member. The laser beam is detected at a predetermined position, wherein the laser beam is detected at a time during which a rotating polygon mirror is rotating at a speed less than a predetermined speed. Laser beam detection signals are then output. A timing of the output of the detection signals is predicted, wherein the detection signals are not output at a constant interval because the rotating polygon mirror is rotating at a speed less than the predetermined speed. A signal to turn on the laser beam is generated based on the predicted timing. In another aspect, a line for the detection signals is completed or broken at a timing based on an output interval of the detection signals.

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