Question

Give difference between:
Dot matrix and Laser printer​

Answer 1

Before the 1980s, laser printers were expensive, high-volume units. At that time, dot matrix printers commanded the early PC desktop market for homes and businesses. Compact laser printers, introduced in the late 1980s, turned the trend around with high-quality output and quiet operation. Although computer equipment makers still produce dot matrix printers for a few customers, laser technology has become more widely used, particularly in the business world.

Print Quality

A typical laser printer has a resolution of 1,200 dots per inch, or dpi. It achieves this level of detail through the use of microscopic toner powder, high-performance electronics and precision optics. Many laser printers have color capability at the same high resolution. Some dot matrix printers achieve 240 dpi by making repeated passes over the same printed area, though documents produced this way take at least twice as long to print as those printed at normal quality. As a dot matrix printer's output color depends on the ribbon, virtually none offer choices beyond black and red.

Speed

A typical desktop laser printer turns out about four full-color pages per minute; for black-and-white text, this rises to 25 pages per minute. Dot matrix printers are typically rated at between 200 and 600 characters per second, or about 50 pages per minute in draft mode. Some high-output dot matrix printers achieve 1,100 characters per second, or 100 pages per minute, although the print quality is low-resolution text.

Noise

Dot matrix technology prints by striking an inked ribbon with a column of metal pins. At the speeds required for printing, the pins move very rapidly, producing a loud buzz. Sound-deadening equipment covers reduce the noise to tolerable levels for office use. Laser printers are quiet by comparison. The paper-feed mechanism produces light clicking sounds, but no sound deadening is necessary for a laser printer.

Costs

Laser and dot matrix printers have roughly comparable initial purchase prices: as of October 2012, dot matrix models run between $250 to $600, and you can find low-end laser printers for under $100, though most range between $150 to $600. The per-page cost for dot matrix printers is lower, at .15 to .2 cents per page; laser printers cost from 1 to 9 cents per page. Dot matrix printers use inexpensive ribbons and have little other maintenance; however, the toner cartridges used for laser printing figure heavily into operating costs.

Explanation:

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Answer 2

Explanation:

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• Laser printers rely on the use of fine ink powder and heat to create images. Inkjet printers typically spray liquid ink on paper through microscopic nozzles. And dot matrix printers have pins that push an ink-soaked ribbon against the paper, which creates images or prints.

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