Lexmark launches LED imaging color laser printer


A few days ago, Lexmark introduced a Lexmark C910 color laser printer with an LED engine. It uses a dense LED array as a light emitter, converts the data electrical signal into an optical signal through the LED, and irradiates it to the photosensitive drum for imaging.

In principle, both LED technology and Laser technology require the generation of latent images on the imaging drum. The difference is that the Laser technology is a laser beam from the laser hair. The laser beam is moved in the axial direction of the imaging drum by the rotation of the prism and other mechanical devices. The laser beam is in the radial direction of the imaging drum by the rotation of the imaging drum itself. Move to form a two-dimensional latent image corresponding to the actual image. The LED technology is that the corresponding light-emitting diode illuminates the imaging drum, is imaged in the axial direction of the imaging drum, and is imaged in the radial direction of the imaging drum by the rotation of the imaging drum itself to constitute a two-dimensional latent image corresponding to the actual image.

If the diameter of the LED is continuously reduced, the resolution (ie, print resolution) can be continuously increased, and the print speed is not slowed down while the print resolution is increased. More importantly, the LED color printer is due to the imaging principle of the LED, which can realize the one-time (simultaneous) imaging of the color image, and the two factors of completing the coloring of the color file make the speed of the LED printing, especially the color printing speed high. A printer for common Laser technology. In the printer of Laser technology, the printing resolution is improved, the laser beam emitted by the laser hair is increased on the imaging drum, and the printing speed is slowed down within a certain range. However, at present, in the Laser printing technology, there is a new 4-2-1 print engine, which also realizes one (simultaneous) imaging of color images, and the functions of color printing and black and white printing are the same.

However, in the LED printing technology, the printing resolution has a strict relationship with the hardware of the LED, and the improvement of the resolution requires the LED component itself to be made smaller and more difficult. Laser technology can now easily use some technologies, such as laser pulse modulation technology. In terms of printing effect, LED technology can only use pulse modulation technology from the direction of one axis. Therefore, the printing result is relatively obvious relative to the particles, the color transition is not smooth, and the laser technology adopts two-dimensional control to obtain better and evenly transitioned colors. .
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