interactive screen india.(Surface film is used for resistance, capacitance, etc.). Responsive. Not affected by environmental factors such as temperature and humidity, high resolution, long life (50 million times under good maintenance); high light transmittance (92%), can maintain clear and transparent image quality; no drift, only need to be installed One-time calibration; there is a response from the third axis (that is, the pressure axis), which is currently used more in public places. Surface acoustic wave screens need frequent maintenance, because dust, oil, or even liquids from drinks contaminate the surface of the screen, which will block the wave guide grooves on the surface of the touch screen, causing the waves to not be emitted normally, or the waveforms to be changed and the controller unable to recognize them, which affects For normal use of the touch screen, users need to pay strict attention to environmental hygiene. The surface of the screen must be wiped frequently to keep the screen smooth and regularly and thoroughly wiped thoroughly. ? Touchscreen principle surface acoustic screen three corners of the acoustic screen paste are X, Y directions of transmitting and receiving sonic transducers (transducer: made of special ceramic material, into the transmitting transducer and the receiving transducer An energy device is an electrical signal sent by the controller through a touch screen cable into sound wave energy and surface acoustic wave energy gathered by reflection stripes into electrical signals.) The four sides are engraved with reflection stripes reflecting the surface ultrasonic waves. When a finger or a soft object touches the screen, part of the sound wave energy is absorbed, so the received signal is changed, and the X and Y coordinates of the touch are obtained through the processing of the controller. Four-wire resistive screen The four-wire resistive screen is covered with two transparent conductive layers ITO (ITO: indium oxide, weak conductor) between the surface protective coating and the base layer. When the thickness is reduced to 1800 Angstroms (Angstroms = 10-10) M) It will suddenly become transparent when it is below, and the transmittance will decrease when it is thinner. It will increase again when it is 300 angstroms. It is the main material of all resistive and capacitive screens.), The two layers correspond to X, Y The shaft is insulated with fine transparent insulating particles between its doors. The pressure generated when touching causes the two conductive layers to switch on, and the X and Y coordinates of the touch are obtained due to the change in resistance. Five-wire resistive screen on the five-wire resistive base layer is coated with the screen IQTouch K interactive touch screen feature 20-point touch and dual system -- Android 8.0 system and optional OPS Windows 10Pro system. Its 4K UHD resolution facilitates presentations and collaboration. With optional multi-screen casting software, IQClass 6.0 and installation-free IQClass Plus software, IQTouch K Series can help create an interactive and collaborative teaching atmosphere in class.