Help, what's the reason for the phone being disconnected?

1, extremely afraid of static electricity: it is easy to break through the capacitive screen. Although the glass on the surface of the capacitive screen mobile phone has undergone certain antistatic treatment, it does not mean that it can withstand the static electricity of people in winter, and many people like to put a poor screen sticker on it, so be careful when streaking. It seems necessary to match the cloth bag.

2, afraid of oil and sweat and other conductive media: covering the screen will form a conductive layer, leading to screen drift. Wash it by hand and dry it before use. Take out the stylus quickly, clean the screen often, and don't take a shower room in winter.

3. Fear of "high" temperature: The "high" temperature here is not baked with fire, but reaches a temperature of about 40 degrees, which may cause the capacitive screen to drift. If you keep this temperature for a long time, the capacitive screen will die. Don't bask in the sun, and don't use it for a long time in the scorching sun.

4. Fear of magnetic field: especially the electromagnetic field. If the small magnet is placed on the capacitive screen for a while, the capacitive screen will temporarily fail (or may cause permanent damage). Stay away from the speaker or magnetic screwdriver, go home, and don't put the mobile phone on the speaker.

5. Fear of voltage instability: Generally, a finger touching the capacitive screen will "suck away" a little current, and then the screen will evenly send electricity to the position where the thumb is located from four corners, thus positioning. Therefore, in the case of unstable transmission voltage, the capacitive screen will "drift" or even fail, so it is best to charge it immediately. The main disadvantage of capacitive screen is drift: when the environmental temperature and humidity change and the environmental electric field changes, it will cause the capacitive screen to drift and cause inaccuracy. For example, the temperature rise of the display will cause drift: when the user touches the screen, his other hand or one side of his body will drift near the display; Large objects near the capacitive touch screen will drift backwards after moving, and if someone comes around to watch when you touch it, it will also drift;

The reason of capacitive screen drift belongs to technical congenital deficiency. Although the environmental potential surface (including the user's body) is far away from the capacitive touch screen, it is much larger than the finger area, which directly affects the determination of the touch position.

In addition, in theory, many relationships should be linear, but in fact they are nonlinear. For example, people with different weights or different finger wetting degrees inhale different amounts of total current, but the changes of total current and four partial currents are nonlinear. The four-corner custom polar coordinate system used in capacitive touch screen has no coordinate origin, so the controller cannot detect and recover after drift. Moreover, after the four A/D are completed, the values of the four partial currents are at right angles to the touch point. Because there is no origin, the drift of capacitive screen is cumulative, and calibration is often needed in the workplace. The silicon dioxide protective glass on the outermost layer of capacitive touch screen has good scratch resistance, but for fear of nails or hard objects, knocking out a small hole will hurt the interlayer ITO. No matter whether the interlayer ITO or the ITO layer on the inner surface is damaged during installation and transportation, the capacitive screen will not work normally.