Synchronization signal generating unit of an image forming apparatus
AssigneeKonica Corporation
InventorsKouichi Sawada, Yoshiyuki Ichihara, Jun Nakagawa
Life of this patent
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Abstract
In an image forming apparatus for simultaneously recording plural image lines on a recording medium by scannintg simultaneously with plural light beams along parallel scanning lines in a primary scanning direction, before a deviation detector detects a deviation among the plural light beams in the primary scanning direction, a beam power controller adjusts the electric power for each light beam generator so that the beam diameter of each light beam is made equal to each other.
Claims10
An image forming apparatus for simultaneously recording plural image lines on a recording medium by scanning simultaneously with plural light beams along parallel scanning lines in a primary scanning direction, comprising:
- a plurality of light beam generators, each for generating a light beam having a beam diameter;
- a beam power controller for adjusting electric power supplied to each of the light beam generators so that the beam diameter of each light beam is adjusted;
- a deviation detector for detecting deviation of the plural light beams in the primary scanning direction;
- and
- a synchronizing circuit for generating a synchronizing signal for each light beam based on the deviation detected by the deviation detector so that each light beam is synchronized with timing of an image recording,
- the beam power controller adjusting the electric power supplied to each of the light beam generators so that beam diameters of respective light beams are equal before the deviation detector detects deviation.
An image forming apparatus for simultaneously recording plural image lines on a recording medium by scanning simultaneously with plural light beams along parallel scanning lines in a primary scanning direction, comprising:
- a plurality of light beam generators for generating the plural light beams;
- a deviation detector for detecting deviation of the plural light beams in the primary scanning direction, the deviation detector including
- at least a leading beam detector and a following beam detector arranged in series in the primary scanning direction, and
- memory means for storing data corresponding to inclination of said detector,
- the deviation detector generating first timing signals when the leading beam detector and the following beam detector respectively detect an identical light beam, and generating second timing signals when the leading beam detector detects one of the plural light beams and the following beam detector detects another of the plural light beams;
- and
- a synchronizing circuit for generating a synchronizing signal for each of the plural light beams based on said data stored in said memory means, the first timing signals, and the second timing signals.
Dependencies are inferred from the claim text.