| 摘要 |
<p>A xerographic light emitter array (20) uses organic light emitting diodes (OLEDs) operating at modest light levels to expose a photoreceptor drum or belt (14). This is accomplished by staging a single row array of emitters in the scan direction (104) with increased length of each emitter in the slow scan direction (110) and focusing the increased length and thus increased light level of each emitter onto the photoreceptor (14) in the scan direction (104). Increased emitter lifetime and the ability to operate at lower light levels are achieved in proportion to the length of the emitter. The focusing lens array (18) can include a divergent cylindrical lens (116), a Selfoc lens (118) and a convergent cylindrical lens (120). The emitters can be rectangular in shape to form a square spot on the photoreceptor (14) or the emitters can be elliptical in shape to form a circular spot on the photoreceptor (14). <IMAGE></p> |
