Printer – Output Unit/Devices – Unit’s Of Computer

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Printer- Computer Fundamental- mLand India Technologies

A Printer is a Output Device that accepts text and graphic output from a computer and transfers the information to paper, usually to standard size sheets of paper. This includes text documents, images, or a combination of both. Printers are vary in size, speed, sophistication, and cost.

what is a printer

Examples of Most Known 3 Types Of Printer:

+  Dot Matrix Printers

+  Inkjet Printers

+  Laser  Printers

+  Dot Matrix Printers

what is a dot matrix printer

A printer that uses hammers and a ribbon to form images from dots is called a Dot Matrix Printer. Used to print multipart forms and address labels, the tractor and sprocket mechanism in these devices handles thicker media better than laser and inkjet printers. These printers are generally considered outdated, as they cannot create high-quality prints and are costly as well. A Dot Matrix Printer is also known as an Impact Matrix Printer.

How Does A Dot Matrix Printer Works?

Dot Matrix Printing uses a print head that moves back-and-forth, or in an up-and-down motion, on the page and prints by impact, striking an ink-soaked cloth ribbon against the paper, much like the print mechanism on a typewriter. When running the printer, it generally prints one line of text at a time.

What Are Advantages of Dot Matrix Printers?

  1. Cheaper than Most Printers.
  2. Can Print Carbon Copies.
  3. Indication of Ribbon Replacement.

What Are Disadvantages of Dot Matrix Printers?

  1. Output is Not High Resolution.
  2. Pins Can Bend Easily.
  3. Time-Consuming and Prone to Paper Jamming.

+  Inkjet Printers

An Inkjet Printer is a computer peripheral that produces hard copy of a document by spraying ink onto paper. In the printing mechanism, the print head has several tiny nozzles, also called jets. As the paper moves past the print head, the nozzles spray ink onto it, forming the characters and images. Inkjet Printers are the most popular choice for home printing needs.

How Does A Inkjet Printer Works?

In a thermal Inkjet Printer, tiny resistors create heat, and this heat vaporizes ink to create a bubble. As the bubble expands, some of the ink is pushed out of a nozzle onto the paper. When the bubble “pops” (collapses), a vacuum is created. This pulls more ink into the print head from the cartridge.

What Are Advantages of Inkjet Printers?

  1. Low cost.
  2. High quality of output, capable of printing fine and smooth details.
  3. Capable of printing in vivid color, good for printing pictures.
  4. Easy to use.
  5. Reasonably fast.
  6. Quieter than dot matrix printer.
  7. No warm up time.

What Are Disadvantages of Inkjet Printers?

  1. Print head is less durable, prone to clogging and damage.
    Expensive replacement ink cartridges.
  2. Not good for high volume printing.
  3. Printing speed is not as fast as laser printers.
  4. Ink bleeding, ink carried sideways causing blurred effects on some papers.
  5. Aqueous ink is sensitive to water, even a small drop of water can cause blurring.
  6. Cannot use highlighter marker on inkjet printouts.

+  Laser  Printers

A Laser Printer is a printer that uses a focused beam or light to transfer text and images onto paper. Some common uses for laser printers include printing company stationery, making labels, and creating company fliers and brochures. The result is a clean copy of the image written on the paper. Because Laser Printers do not use ink, they have less image smearing problems than inkjet printers and are able to print pages faster.

How Does A Laser Printer Works?

Laser Printer makes a laser beam scan back and forth across a drum inside the printer, building up a pattern of static electricity. The static electricity attracts onto the page a kind of powdered ink called toner. Finally, as in a photocopier, a fuser unit bonds the toner to the paper.

What Are Advantages of Laser Printers?

  1. Long life.
  2. Fast printing speed.
  3. Long-term non-printing effect will not change.
  4. Suitable for mass printing, low cost.
  5. The machine is relatively stable.
  6. Low quality requirements for paper.

What Are Disadvantages of Laser Printers?

  1. High initial investment cost.
  2. Color toner cartridge are expensive.
  3. Toner is harmful to humans.
  4. Will cause environmental pollution and release ozone.

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