| 摘要 |
<p>A laser printer (10) produces a raster image of plural scan tines of image pixels, each raster scan line separated from an adjacent raster scan line by a pitch distance p. The printer (10) includes a movable photoreceptor (36) and n laser sources (52,54), where n ≤ 2. The laser sources (52,54) produce n optical beams (32,32'), separated by a distance of (n + 1)p in a direction of movement of the photoreceptor (36). A scanner (34) scans the n optical beams (32,32') in parallel paths across the photoreceptor (36) as they are modulated in accordance with pixel data provided from an image buffer (18). Control circuitry (12,30) modulates the n optical beams (32,32'), respectively, with pixel values from one set of n raster scan lines. The n raster scan lines of the set are separated from each other by a distance of (n + 1)p. At the completion of each scan, the photoreceptor (36) is moved by a distance (n x p). The n optical beams (32,32') are again modulated with pixel values from another set of n raster scan lines that are respectively, (n+1)p distant from the n raster scan lines of the first set. In such manner, an interleaving of the scan lines is achieved, using plural optical beams (32,32') from a laser diode chip (50) to produce the n laser beams (32,32'). <IMAGE></p> |
