For a tablet or smartphone, the touch screen is not only a means of displaying information, but also of controlling the device, which is very important. The first such display was invented back in the seventies of the last century, and began to be actively used on game consoles and smartphones. Conventionally, all sensors are usually divided into capacitive and resistive. Resistive technology is outdated today, but it is used quite widely, which can significantly reduce the cost of the final cost of the device. This technology involves the use of any more or less sharp object for contact with the screen, however, the list of advantages of such devices ends with the cheapness and variety of control accessories.
Capacitive touch screens are distinguished by the fact that the gadget can be controlled only when using objects that have a large capacitance that conducts current. The screen itself is made in the form of a glass panel coated with a resistivematerial that has a sufficiently high degree of transparency. When the screen is touched with fingers or another object that conducts current, current leakage occurs, which is registered by electrodes located at the corners of the panels. Capacitive touchscreens are equipped with controllers that register the touch point. So it turns out a touch to a certain point. Capacitive touch screens are highly reliable, allowing at least two hundred million touches.
You can consider other options of this type. The capacitive touch screen type became the progenitor of such technology as projected capacitive. Here the principle of operation is based on the operation of the grid of electrodes located on the inside of the screen. Together with the human body, they form a capacitor, the capacity of which changes the display controller. This technology is used in the production of the iPhone.
Capacitive touch screens have a number of advantages. They can be considered in comparison with resistive ones to make it more clear. Of course, in such a comparison, the former win, since they have great advantages. They have a higher level of reliability. They do not require calibration. The sensitivity of such screens is much higher. Capacitive multi-touch touch screen supports multi-touch technology, which cannot be said about resistive.
It is noteworthy that the specified manufacturing methodscreens is becoming more and more available in end devices for buyers every year, today it can be increasingly seen in budget versions of tablets and touch phones. The only very controversial drawback is the inability to work with the stylus, but this has already been fixed. Based on the described arguments, capacitive touch screens can be called the most promising in the production of tablets at the moment.
