Output Devices | What is output devices?

 Output Devices

It is usually assumed that one user is present at a given time. Output devices (such as printers, digital cameras, etc.) for single use are often available for exclusive use by a single user. On a system for multiple use, such as a workstation or server, it is assumed that multiple users will access the device at the same time.

• Printer: Printer are the most popular output devices. They provide inforrmation in a permanent readable form. They produce printed outputs of result, programs and data. A character printer prints on character of the text at a time. They are low-speed printers. Their printing speed lies in the range of 30-600 characters per. second.

• Impact Printers:

• An impact printers is a type of printer that operates by striking a metal or plastic head against an ink ribbon. The ink ribbon is pressed against the paper, marking the page with the appropriate character, dot, linear symbol.
  
  
  

• Common example of impact printers include dot matrix, daisy wheel printers and ball printers.

• Non-Impact Printers:

• Non-impact printers used almost everywhere now, are faster and quiter than impact printers because they have fewer moving parts. Non impact printers form characters and image without direct physical contact between the printing mechanism and the paper.

• Two types of Non-Impact printers often used with microcomputers are laser printer and ink-jet printers.

• Laser Printer: To make a dot, the laser is first modulated. Then a lens (or lenses, possibly more than one) are used to focus the modulated light, through whatever the medium between the laser and the actual point is. This usually is paper, but not always, so there's also a "lens array" that is often used to provide many, many lenses.
  
  
  

• Ink-Jet Printer: Printing technology that allows for high speed printing on paper, glossy or non-glossy. Printing technology that has its own print head but uses an electronic signal to direct the ink.
  
  
  

• Plotter: A plotter is a computer vector graphic printer that gives a hard copy of the output based on instruction from the system. Plotters are widely used to print designs of things such as cars, ships and buildings on a piece of paper using a pen.