The Principle of Thermal Printer

Thermal printer mechanisms in the core components for the thermal film, a row of tiny semiconductor components. These components generate energy when a certain current is applied.
    Thermal printer using thermal paper, thermal paper coated with a layer of heat will produce a chemical reaction and change the color of the coating. As the coating materials used in different varieties, so the color appears black, blue, purple and so on.
    After receiving the print data, the thermal printer converts the print data into bitmap data, and then controls the semiconductor element on the Printer Mechanisms to generate an appropriate temperature through the appropriate current according to the dot data. This causes the print data to be printed on the print paper.

Thermal printer advantages and disadvantages

       Micro printers generally have three types: stylus, pen and thermal. Relative to the dot matrix printer, thermal printing speed, low noise, clear writing fine image, easy to use. With the best thermal paper can save twenty years. But can not print directly duplex. Needle printing can print double, with a good ribbon, print documents can be stored for a long time, but the needle print slow, noisy, rough handwriting, need to change the ribbon. Pen print speed is low, high cost, but can quickly depict "vector" graphics.