What Is a Thermal Printer?

The working principle of a thermal printer is that a semiconductor heating element is installed on the print head. After the print head is heated and contacts the thermal printing paper, it can print the required pattern. The principle is similar to that of a thermal fax machine. The image is generated by heating and generating a chemical reaction in the film. This thermal printer chemical reaction is carried out at a certain temperature. High temperatures can accelerate this chemical reaction. When the temperature is lower than 60 ° C, it takes a long time for the paper to become dark, and when the temperature is 200 ° C, the reaction is completed in a few microseconds.

Thermal printer

The working principle of a thermal printer is

Thermal

Thermal paper is a special coated paper, its appearance is similar to ordinary

Thermal printing

The key to thermal printing technology is the heating element. There is a row of tiny semiconductor elements on the core of the thermal printer. These elements are densely packed, ranging from 200dpi to 600dpi. These elements will quickly generate high temperature when a certain current is passed. When the thermal paper is coated with these components, the temperature will rise in a very short time, and the coating on the thermal paper will undergo a chemical reaction and appear colored.

Relative to

Thermal printers can be divided into line thermal (Thermal Line Dot System) and column thermal (Thermal Serial Dot System) according to the arrangement of their thermal elements. In-line thermal sensors belong to the early products and are mainly used in some places where the printing speed is not high. Domestic authors have already used them in their products. Line thermal is a technology of the 1990s, its printing speed is much faster than column thermal, the fastest speed has reached 230mm / s. In order to achieve high-speed thermal printing, in addition to selecting a high-speed thermal printhead, a corresponding control board must be matched with it.