Common faults of industrial tablet computers with capacitive screens
Capacitive touch screen, also called capacitive touch screen, is a four-layer composite glass screen that uses capacitive touch technology to work. The inner surface and interlayer of the capacitive screen are each coated with a layer of ITO conductive layer, and the outermost layer is only 0.0015 mm thick silicon Earth glass protective layer.
The touch screen of industrial displays is divided into non-touch, resistive touch and capacitive touch and other touch methods, and capacitive touch is a more common touch method. How to solve the problem when the industrial capacitive screen fails? What are the principles to follow? ?The engineer from Qianhai Gaole will take you to find out.
The so-called "drift" of the capacitive screen mainly refers to the following situations: 1. Misoperation of the touch operation, that is, touching point A, but responding to the touch of point B; 2. Misaction without touching, that is, the body or Conductive objects are close to the screen, and they react to the touch without touching them; 3. There is no action on the touch operation, that is, the touch screen has been touched with a finger, but the screen has not made a touch response.
Before introducing the causes of "drift", it is necessary to introduce the working principle of the capacitive screen. Capacitive screens need to realize multi-touch by increasing the electrodes of mutual capacitance. Simply put, the screen is divided into blocks, and a set of mutual capacitance modules are set in each area to work independently, so the industrial tablet computer capacitive screen can be independent The touch condition of each area is detected, and after processing, multi-touch is simply realized.