Surface capacitive touch panel and projection capacitive touch panel

　　Capacitive touch panel is the second most widely used sensing method after resistive touch panel. Corresponding to the names used for the above-mentioned analog resistive touch panels, these are also called analog capacitive touch panels. In addition to stand-alone liquid crystal displays, these are usually used in the same devices as resistive touch panels, such as smart phones and mobile phones.Therefore, this is the choice industrial touch panel pc The reason, there is no denying its positive impact. https://www.innodapc.com/

　　

　　When this method is adopted, the touch point is determined by the sensor by sensing the slight current change caused by finger contact or electrostatic capacity (load) change. Since the sensors can respond to the electrostatic capacity of the human body when the fingers are close to the screen, they can also perform similar operations on the contacts moving in an area on the screen.

　　

　　There are two types of touch panels that use this method: surface capacitive touch panel and projection capacitive touch panel. The internal structure of the two types is different.

　　

　　Surface capacitive touch panel

　　

　　Surface capacitive touch panels are generally used on larger panels. In these panels, a transparent electrode film (electrode layer) is covered on the glass substrate, and a protective film is covered on it. Voltage is applied to the electrodes at the four corners of the glass substrate to generate a uniform low-voltage electric field on the whole panel. The position coordinates of finger touching the screen are determined by measuring the changes of electrostatic capacity at four corners of the panel.