7 inch touch screen lcd.The capacitive touch screen works by using human body's current sensing. The capacitive touch screen panel is a four-layer composite glass, the inner surface of the glass panel coated with a layer of the sandwich and the ITO (conductive glass coating), the outermost layer is a thin layer of silica glass protective layer , the ITO coating as a face , four Four electrodes are drawn at the corners, and the inner layer of ITO is a shielding layer to ensure a good working environment. When the finger touches the metal layer, the user and the touch screen surface form a coupling capacitance due to the electric field of the human body, and the finger draws a small current from the contact point. This current is flowing from the electrodes on the four corners of the touch screen, and the current flowing through the four electrodes is proportional to the distance from the finger to the four corners. The controller calculates the position of the touch point through accurate calculation of the four current ratios. .

7 inch touch screen lcd.The capacitive touch screen works by using human body's current sensing. The capacitive touch screen panel is a four-layer composite glass, the inner surface of the glass panel coated with a layer of the sandwich and the ITO (conductive glass coating), the outermost layer is a thin layer of silica glass protective layer , the ITO coating as a face , four Four electrodes are drawn at the corners, and the inner layer of ITO is a shielding layer to ensure a good working environment. When the finger touches the metal layer, the user and the touch screen surface form a coupling capacitance due to the electric field of the human body, and the finger draws a small current from the contact point. This current is flowing from the electrodes on the four corners of the touch screen, and the current flowing through the four electrodes is proportional to the distance from the finger to the four corners. The controller calculates the position of the touch point through accurate calculation of the four current ratios. . 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.