The Receipt Printer China is composed of laser, acousto-optic modulator, high-frequency drive, scanner, synchronizer and optical deflector. The function of the Portable Printer China is to modulate the binary lattice information sent by the interface circuit on the laser beam and then scan to the photosensitive body. The photosensitive body and photographic mechanism constitute an electronic photocopying system, which transfers the image and text image on the photosensitive drum onto the printing paper. Laser printer is a non-impact output device which combines laser scanning technology and electronic imaging technology. The printing function is different with different models, but the working principle is basically the same, all of which have to go through seven processes: charging, exposure, developing, POS Printer Supplies, power dissipation, cleaning and fixing, among which five processes are carried out around the light-sensitive drum. When the text or image to be printed is input into the computer, it is preprocessed by computer software. And the Thermal KIOSK Receipt Printer driver converts printers can identify the print command language (printer) to high frequency drive circuit, to control the opening and closing of the laser, laser beam forming lattice, turn again by the scanning mirror of electronic imaging system of the photosensitive drum axial scanning exposure, longitudinal scan by the drum rotation of implementation.