The so-called “drift” of the capacitive screen mainly refers to the following situations

(1) Misaction of touch operation, that is, touching point A, but responding to point B,

(2) Misaction without touching, that is, the body or conductive object is close to the screen, and the touch response is made before touching.

(3) No action on 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 capacitive screens. Capacitive touch screens work using the body’s current sensing. The capacitive touch screen is a four-layer composite glass screen, the inner surface and the interlayer of the glass screen are each coated with a layer of ITO (transparent conductive film), the outermost layer is a thin layer of silica glass protective layer, the sandwich ITO coating is used as the working surface, four electrodes are drawn out on the four corners, and the inner ITO is the shielding layer to ensure a good working environment.

When the finger touches the metal layer, due to the electric field of the human body, the user and the surface of the touch screen form a coupling capacitance, which is a direct conductor for high-frequency currents, so the finger draws a small current from the contact point. This current divides from the electrodes on the four corners of the touch screen, and the current flowing through these four electrodes is proportional to the distance of the finger to the four corners, and the controller derives the position of the touch point by accurately calculating the proportion of these four currents.

It is precisely because of this working principle of the capacitive screen that the phenomenon of “drift” exists. After figuring out the working principle of the capacitive screen, it is easy to know the reasons for the “drift” of the capacitive screen. The main reasons are as follows:

1. Static electricity Since the capacitive screen relies on the electric field for positioning, very slight static electricity will lead to the occurrence of “drift” phenomenon. If an electrostatic discharge occurs, it may even damage the capacitive screen permanently.

2. Magnetic field The magnetic field will produce an electric field, so the “drift” phenomenon will occur when the capacitive screen is in a strong magnetic field. If the magnetic field is too strong or it is in a strong magnetic field for a long time, it may even permanently damage the capacitive screen.

3. Conductive substances Conductive substances attached to the screen, such as oil, sweat, water vapor, etc., will lead to the occurrence of “drift”, and if they accidentally flow into the inside of the screen, they may even permanently damage the capacitive screen and other components.

4. Ambient temperature and humidity The best working temperature of the capacitive screen is 5°C~35°C, and the working humidity is 30%~90% without condensation. The storage temperature of the capacitive screen is -20°C~60°C, and the storage and transportation in a high or low temperature environment may also damage the capacitive screen. Special attention should be paid to the fact that the capacitive screen is more afraid of high temperatures, and it is possible to permanently damage the capacitive screen if it is exposed to sunlight for a long time or placed in a high-temperature environment for a long time. After the screen heats up due to charging, wait for the screen temperature to decrease before use.

5. Voltage When the battery voltage is low or the voltage is unstable, it may cause the capacitive screen to “drift”. Using a good battery and charging your phone in a timely manner can avoid drift caused by voltage issues.

6. Physical damage Impact and vibration will damage the silica glass protective layer and/or ITO, causing permanent damage to the capacitive screen, resulting in “drift” or even the complete scrapping of the capacitive screen. Therefore, when storing and transporting, it is necessary to avoid large vibrations and collisions as much as possible; Eliminate vigorous knocking when in use, so as to protect the capacitive screen and prolong the service life.

Please note before using the computer: before use, you must connect the VGA cable of the monitor before turning it on, do not hot-swap the VGA cable after booting and in use, otherwise the monitor will not be displayed normally, if the monitor still cannot be displayed after the Windows scroll bar appears, you can try the following methods to get the solution

Method 1: Press the “F8 key” on the keyboard to enter the “Safe Mode” (or VGA mode) when entering the system, uninstall the graphics card driver in the Device Manager, then restart the system, and reinstall the graphics card driver.

Method 2: Reinstall or restore the operating system.