LED printers are identical in principle to laser printers except for the light source used. LEDs are more efficient mechanically than normal laser printers, since there are fewer moving parts. A laser printer is a common type of computer printer that produces good quality printing, and is able to produce text and graphics. ... External links LEd Category: TeX ...
Laser systems rely on elaborate combinations of rotating mirrors and lenses that must remain in alignment through use. The laser scans from one end of a line to another, then zig-zags down to the next line.
LED technology uses a Light Emitting Diode printhead as a light source within the imaging device. Unlike laser systems, the LED printhead is solid-state and has no moving parts. The LED bar pulse-flashes across the entire page width and creates the image on the print drum as it moves down.
Depending on design, LED printers can have faster rates of print than some laser based designs, and are generally cheaper to manufacture. There are concerns about the LEDs in the printer experiencing early burnout due to repeated on/off switching as a print is made.
LEDprinters function by means of an array of LEDs built into the cover of the printer - usually more than 2,500 covering the entire width of the drum - which create an image when shining down at 90 degrees.
The advantage is that a row of LEDs is cheaper to make than a laser and mirror with lots of moving parts and, consequently, the technology presents a cheaper alternative to conventional laser printers.
A key area of development, pioneered by Lexmark's 12ppm LEDprinter launched in the autumn of 1998, is to boost colour print speed up to the same level as mono with simultaneous processing of the four toners and one-pass printing.
Feeds |
Contact