Image recording method and image recording apparatus

Details Image recording method and image recording apparatus Image recording method and image recording apparatus

2006-10-24

2006-10-24

Pham, Hai (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

C347S255000

Reexamination Certificate

active

07126624

ABSTRACT:
The image recording method and image recording apparatus synchronize phase of a light deflector with rotation of a drum in response to the drum start point detection signal generated each time the drum rotates once, expose the two-dimensional image of one frame formed by a group of light sources disposed two-dimensionally onto the recording medium while causing the image at rest on the recording medium relatively thereto, thereafter move the optical system in the auxiliary scanning direction by an integral multiple of a pixel pitch forming one frame as well as deflect an angle of the light deflector in the main scanning direction by one frame so as to expose the next frame and on for one rotation of the drum. When the position is dislocated in the auxiliary scanning direction at the time the recording medium is to be exposed in a subsequent one rotation of the drum, the method and apparatus correct the dislocation of the position in the auxiliary scanning direction by changing an auxiliary scanning movement speed in a non-exposure time zone between the previous and subsequent rotations of the drum.Accordingly, the method and apparatus can prevent the occurrence of streaked unevenness in the surface exposure and spiral exposure.

REFERENCES:
patent: 4745487 (1988-05-01), Nishikawa
patent: 5668588 (1997-09-01), Morizumi et al.
patent: 6624877 (2003-09-01), Uemura et al.

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