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A page printer is a computer printer which processes and prints a whole page at a time, as opposed to printers which print one line or character at a time such as line printers and dot-matrix printers. Page printers are often all incorrectly termed “laser printers”—although virtually all laser printers are page printers, other page printing technologies also exist. ==Components== The components of a page printer are: *A print engine, "the unit within a printer that does the actual printing."〔(【引用サイトリンク】url=http://www.pcmag.com/encyclopedia/term/49696/printer-engine )〕 For example, in a laser printer this would consist of the laser and drum and the mechanical paper feeds. * Memory to process input and build up the image of a page. The printer may have its own memory or may use the host computer’s memory. * A page description language (PDL), with commands which tell the printer how to format the page. Popular PDLs are PCL (Printer Command Language) from Hewlett-Packard, PostScript from Adobe Systems and PostScript clones, and Windows’ Graphics Device Interface (GDI). *A raster image processor (RIP), i.e. a processor which constructs the bitmap image of the page. Sometimes, this processing is done by the host computer. In other cases printers may have powerful processors to perform this task. *A printer driver, a program (device driver) which converts the computer’s information about the page into the actual PDL. Printer drivers may be included with the operating system, be distributed with the printer on CDs or DVDs, or be downloaded from the printer manufacturer’s home page or from independent web sites. *A connection (interface) to the host computer. Many printers communicate by wi-fi. Other popular interfaces are USB and Ethernet. Many older printers also have a parallel (Centronix) interface. High-end printers often have a channel interface for direct connection to a mainframe computer. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Page printer」の詳細全文を読む スポンサード リンク
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