Printers
The first computer printer design was a mechanically driven apparatus by Charles Babbage for his difference engine in the 19th century. The first electronic printer was the EP-101 invented by the Japanese company EPSON. The first commercial printers generally used mechanisms from electric typewriters and teletype mechanics. A printer is a device that accepts texts and graphics output from a computer and transfers the information to paper, usually to understand the size sheet of paper. Personal printers can be distinguished as impact or non-impact printers.
QUALITIES:
- Color: Color is important for the user who prints the pages for presentation or map and other pages where color is the part of the information. A printer capable of printing more than one color. Most color printers are based on the CMYK color models, which prints in four basic colors: cyan, magenta, yellow and black.
- Resolution: Printer's resolution is usually measured in dots per inch (dpi). Most inexpensive printers provide sufficient resolution for most purposes at 600 dpi.
- Speed: If you do much printing, the speed of the printer becomes important. Inexpensive printers print only 3 to 6 sheets per minute. Color printing is slower. More expensive printers are much Faster.
- Memory: Most printers come with a small amount of memory that can be expended by the user. Having more than the minimum amount of memory is helpful and faster.
MODERN PRINTING TECHNOLOGY:
- Toner Based Printers
- Liquid Inject Printers
- Solid ink Printers
- Dye-Sublimation Printers
- Thermal Printers
PRINTING MODE:
The data received by a printer my be:
- A string of character
- A bitmapped image
- A vector image
- A computer program is written in a page description language.
- Character printers, such as daisy wheel printers can be handled only plain text or data.
- Pen plotters typically process vector images.
