Notice on rejecting screen failure Android capacitive screen Maintenance

Recently, I often hear from Members that the Android mobile phones, such as Motorola milestones, do not respond to touch and screen failures. In this case, do not panic. In fact, this phenomenon is normal on the touch screen mobile phones. This requires us to pay more attention to maintenance and maintenance when using touch screen mobile phones, so this horrible crash failure can be avoided as much as possible.

　

Motorola milestone screen lock interface and Main Interface

The following are some of the most popular capacitive screen maintenance skills on the Internet. They are provided to mobile phone users with touch screens as a necessary reference.

Currently, the mainstream capacitive screen mobile phones include some Nokia mobile phones, most Android mobile phones, and Apple mobile phones. Maintenance reference:

1. Extremely fear of static electricity: it is easy to penetrate the capacitive screen. Although the glass on the mobile phone surface of the capacitive screen has undergone some antistatic processing, it does not mean that it can withstand the static electricity of the human body, in addition, many people prefer to paste a poor screen sticker that is prone to static electricity on the mobile phone surface. We recommend that you select a leather cover for your mobile phone.

2. conductive media such as oil stains and sweat: a conductive layer will be formed when covered on the screen, causing screen drift, hand cleaning, dry and then use.

3. Fear of "high" temperature: the "high" temperature here is not to be roasted with fire, but to a temperature of about 40 degrees, it may cause the capacitive screen to drift, which is at this temperature for a long time, the capacitive screen will be tilted to the braid and should not be used in the high temperature sun for a long time.

Suggestion: If the screen temperature is high during charging, Please reduce the temperature for some time before charging.

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 (and may cause permanent damage) don't get close to speakers or magnetic screws or other items. When you get home, don't put your cell phone on the speaker.

5. Unstable voltage: Generally, when the finger is in contact with the capacitive screen, it will "suck" a little bit of current, and then the screen evenly transmits electricity from four corners to the position where the thumb is located, in this case, the capacitive screen may be moved or even invalidated when the transmission voltage is unstable. In addition, it is best to charge immediately when the power is less than 20%.

The main drawback of the capacitive screen is drift: when the ambient temperature and humidity change, the Environmental electric field changes, it will cause the drift of the capacitive screen, resulting in inaccuracy. For example, when the screen is turned on, the temperature of the monitor increases, causing drift: when the user touches the screen, the other hand or one side of the body is close to the monitor, and large objects near the capacitive touch screen are moved back to drift, when you touch the screen, if someone comes around to watch it, it will also cause drift. The reason for the capacitive screen drift is the inherent technical deficiency, the environmental potential surface (including the user's body) although far away from capacitive touch screens, they are much larger than the finger area, and they directly affect the determination of the touch position.

In addition, in theory, many linear relationships are actually non-linear. For example, the total electric traffic consumed by people with different weights or different degrees of moisture on their fingers is different, however, the changes in the total electrical flow and the changes in the four sub-electric flows are non-linear. The custom Polar Coordinate System of the four corners used by the capacitive touch screen does not have the origin of the coordinates, after drifting, the controller cannot detect and recover, and after four A/D completes, the calculation process from the four traffic separation values to the X and Y coordinate values of the touch point in the Cartesian coordinate system is complex. Because there is no origin, the drift of the capacitive screen is cumulative, and calibration is often required at the work site. The outermost protection glass of capacitive touch screen has good anti-scratch performance. However, if you are afraid of hitting your nails or hard objects, hitting a small hole will hurt the interlayer Ito, whether it is damage and interlayer Ito or damage the inner surface ITO layer during installation and transportation, the capacitive screen will not work normally.

Comments: The above are some of the reasons that cause screen failures of Capacitive screens and so on, which are often overlooked in our daily life. In the process of using mobile phones, if a fault occurs, consider whether the problem is caused by the above reasons and further analyze the solution, cause more serious problems.