Fuji Xerox Develops High Resolution,
High Image Quality LED Printhead
Incorporated in Office-Use Multifunction Devices and Printers
| Traditionally, Fuji Xerox’s products have mainly employed a laser ROS (Raster Output Scanner) system that scans with laser beams using a polygon mirror as its mechanism for writing images on to the photoreceptor drum. Since LED printheads do not require a motor or other apparatus to rotate the polygon mirror or mirror, they have advantages including smaller dimensionsNote, lower cost and noise-free operation. Compared with the laser ROS system, however, it was difficult to achieve high image quality (See Diagram 1 for a comparison of the laser ROS system and the LED printhead system). |
| Due to the LED printhead’s many light sources, it is difficult to maintain uniform light exposure with higher resolutions. Fuji Xerox, however, developed a technology to maintain uniform light exposure as well as a system that adjusts the properties of the LED and lens. A newly developed IC chip combines these new technologies and a driving IC circuit, thus achieved high image quality and resolution (1,200 x 2,400 dpi), which is equivalent to or better than ROS systems. |
| Note: |
About 1/40 in terms of volume ratio. |
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| Diagram 1: Comparison of Laser ROS System and LED Printhead |
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