Capacitive touch screen is in the glass surface affixed to a layer of transparent special metal conductive material. When the finger touches the metal layer, the capacitance of the contact changes so that the frequency of the oscillator connected to it changes, Capacitive Touch Screen and the touch position information can be determined by measuring the frequency change. Capacitive touch screen is to support multi-touch human-computer interaction
From the capacitive touch screen R & D process introduced, focusing on ITO alignment design and capacitive touch screen LENS, FPC, screen, OCA, protective film, packaging materials and other elements of the design requirements and attention to the reader from the most basic Knowledge of cognitive capacitive touch screen design knowledge points, help to improve the design of the rationality, Capacitive Touch Screen but also easy to control the process of production and improve the improvement of the final capacitive touch screen of the technical standards of the reliability of norms and inspection practices Induction, can improve the quality control of the standard set up and inspection practices.
In a projection capacitive sensor, the sensing capacitor can be designed in a manner that detects a touch at any given time, which is not limited to one finger or multiple fingers. Projected capacitive sensors can be used in many devices, such as touch the input board and capacitive touch screen, Capacitive Touch Screen the basic principle of its operation is the same. The difference lies in the sensor electrode material, the sensor substrate, the manufacturing method, and the method stack many problems. The touch panel can be made of opaque material, such as a metal-based or sensor-based carbon-based electrode.
The capacitive touch screen must be transparent and therefore made of the same material as the transparent conductor based on a resistive touch screen.
However, unlike capacitive touch screens, capacitive touch screens do not require an air gap between the layers and do not require any layer to deform, so the sensor can use a hard glass or plastic substrate. The key difference between the projected capacitive and resistive touchscreen construction is that the ITO requirements of the capacitive touch screen are on the previous layer as a later layer rather than as a resistive touch screen. Capacitive Touch Screen The Although the complexity of the process, but taking into account the benefits of capacitive touch screen, or very worthwhile.