What is Laser printer?
[[File:Apple LaserWriter Pro 630.jpg|thumb|right|The Apple LaserWriter Pro 630 was one of the first laser printers]] A '''laser printer''' is a [[computer printer|printer]] for [[computer]]s. It uses [[laser]] or [[LED]]-technology to get small [[particle]]s of [[toner]] from a [[Ink cartridge|cartridge]] onto [[paper]]. Very often, this costs less to use than the [[ink]] of [[inkjet printer]]s. Laser printers often print text more neatly than inkjet printers, but print photos less clearly. Printing on photo paper or coated paper designed for inkjet printers can damage the laser printer's drum and fuser unit. The [[laser]] printer was first [[invent]]ed by a team at [[Xerox]] in 1969.{{fact|date=April 2009}} The first laser printer was called the Xerox 2000. == Process == Laser printing is a process which typically involves seven steps: # '''[[Raster image processor|Raster Image Processing]]''': the processor inside the printer converts the [[Information|data]] to be printed from its current [[file format]], into a [[bitmap]] of the page to be [[print]]ed - this is then stored in raster [[image]] [[Computer memory|memory]]. # '''Charging''': An electrostatic [[Electric charge|charge]] is then projected onto a revolving photosensitive [[drum]] inside the printer. # '''Writing''': A laser [[beam]] is directed at a rotating polygonal [[mirror]], which redirects the beam onto the photosensitive drum. The rasterized data in memory is now read, and used to control whether the laser is on or off, as the beam sweeps across the drum - where the laser beam strikes the drum the charge is reversed, creating a latent [[electric]]al image on the surface. Some laser printers use an array of tiny LEDs instead of a sweeping laser beam. # '''Developing''': The surface of the drum is then exposed to negatively charged particles of toner, which are attracted to the areas where the laser wrote the latent electrical image. The toner will be repelled by the negative charge on areas of the drum where the laser beam did not strike,