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LED printer

The mode of operation of the LED printer is comparable to that of the laser printer. In the LED printer, the image is transferred to the light-sensitive image drum by a large number of light-emitting diodes. Depending on the resolution

, there may be several thousand light-emitting diodes arranged on an LED strip the width of the print format. The light-emitting diodes transfer the charge image, which corresponds to the print image, line by line to the roller-shaped image drum by electrostatically charging the surface through exposure. During drum rotation, the electrically charged toner

is picked up at the charged points and transferred to the paper. The paper is also electrically charged. Thetoner is fixed by heat and pressure, and the

excess toner is scraped off by a scraper and collected in the waste toner box

.

Structure of an LED printer

Structure of an LED printer

The print resolution of LED printers is directly dependent on the number of light-emitting diodes and is, for example, with 5,000 light-emitting diodes at about 600 dpi. Since LED printers prepare the print image page by page beforehand, they require several megabytes for the print pages, depending on the resolution.

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Englisch: LED printer
Updated at: 04.12.2009
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