Dot matrix printer
Dot matrix printers have occupied an important position for a long time in the history of printers. From 9 needles to 24 needles, it can be said that the history of dot matrix printers runs through the past decades. The reason why the stylus printer can be popular for a long time is inseparable from its extremely low printing cost, good ease of use and the special purpose of receipt printing. Of course, its very low print quality and large operating noise are also the root cause of its inability to adapt to high-quality, high-speed commercial printing needs, so now it only needs to be used for ticket printing in banks, supermarkets and other very few places. It can be seen.
Colorful inkjet printer
Colorful inkjet printers occupy the vast low-end market because of their good printing effect and low price. In addition, inkjet printers also have more sensitive paper processing capabilities. In the choice of printing media, inkjet printers also have certain advantages: they can print ordinary media such as envelopes and letter paper, as well as various film, photo paper, Special media such as CD covers, roll paper, T-shirt transfer paper, etc., will be introduced as a key point in the following.
The laser printer is a new product developed by high technology, and it is also a model that is expected to replace inkjet printers. It is divided into right and wrong and colorful. It provides us with higher quality, faster, and lower cost printing. method. In the meantime, the price of low-end non-laser printers has dropped to a few hundred yuan, reaching a level that ordinary users can afford. Its printing principle is to use the raster graphics processor to generate the bitmap of the page to be printed, and then convert it into a series of pulses such as electrical signals and send it to the laser transmitter. Under the control of this series of pulses, the laser is regularly controlled. release. At the same time, the reflected light beam is received by the photosensitive drum. A dot occurs when the laser is emitted, and it is blank when the laser is not emitted, so that a row of dots is printed on the receiver. Then the receiver rotates for a short fixed interval and repeats the above operation continuously. When the paper passes through the photosensitive drum, the colorant on the drum is transferred to the paper and printed as a bitmap of the page. Finally, when the paper passes through a pair of heating rollers, the colorant is heated and melted, fixed on the paper, and the entire printing process is completed, which is accurate and efficient. Although laser printers are much more expensive than inkjet printers, laser printers are much cheaper in terms of single-page printing costs. The price of colorful laser printers is generally around 2,000 yuan.
In addition to the above three most common printers, there are several professional printer models such as thermal transfer printers and large format printers. Thermal transfer printers use transparent dyes for printing. Its advantage lies in professional high-quality picture printing. It can print continuous-color pictures that are close to photos. It is generally used for pre-press and professional graphic output. Large-format printers have basically the same printing principles as inkjet printers, but the print width can generally reach more than 24 inches (61cm). Its main use has been concentrated in the field of engineering and construction. However, with the improvement of its ink durability and the increase of graphics resolution, large-format printers have also begun to be used more and more in advertising production, large-scale photography, art photography and interior decoration and other decorative promotion categories, and they have become printers. An important member of the clan.
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