Most of us interact with touch screen devices on a daily basis, yet we never think twice about why touching a screen causes a series of reactions. How on earth can we make a phone call by touching a screen? Here are the top 3 types of touch screens and how they work.
- Resistive Touch Screen. This type is composed of a glass panel and a film screen, both covered independently with a thin metallic layer; these layers are separated by a narrow gap. When the screen is touched, the two metallic layers make contact which results in electrical flow and the point of contact is then detected due to this change in voltage.
- Surface Capacitive Touch Screen. After resistive touch screens, this type is the second most popular on the market. Here, a transparent electrode layer sits on top of a glass panel which is then covered by a protective cover. When the screen is touched, it reacts to the static electrical capacity of the human body. These types of screens can only be activated by the touch of a human.
- Projected Capacitive Touch Screen. This type is similar to surface capacitive, except it can be activated by a bare human finger as well as by a hand in surgical gloves or thin cotton gloves. Additionally, this type can also be activated using two or more fingers at once.