The touchscreen has made a significant impact in the innovation that has revolutionized the technology. The touch screen is one such technology that has changed the way the world is functioning. However, it has also become a common sight these days such as ticket vending machines, cell phones, etc. The technical screens manufacturer is providing many types of touch screens. Let’s get a closer look into it by understanding each type in detail.
5-Wire Touch Screen
For applications that require reliability and durability, the 5-wire resistive touch screen is the preferred solution. It consists of a conductive top film layer and a conducive glass bottom layer. In a 5-wire design, all the electrodes are on the bottom layer while the layer on the top acts as a voltage measuring probe. With this design, the touch screen works well even if the top layer gets slightly damaged or scratched. It is a durable, reliable, and accurate touch screen and it also offers a pretty good touch life.
Surface Capacitive Touch Screen
This type of touch screen has a conductive coating on the front side of the surface. A voltage is applied at every corner and also the wires are attached at every corner. When the screen is touched, a small amount of current flows towards the touchpoint and it causes a voltage drop. Once this drop is sensed by the four corners of the surface, the sensor points to the exact touchpoint accurately. However, it is a declining technology due to its inability to handle heavy use, and it does not have proper touchpoints and input options.
Projected Capacitive Touch Screen
A projected capacitive touch screen offers a multi-touch user-friendly experience. It is generally associated with tablets, smartphones, devices which operate with a light touch on a highly durable surface of the glass. The projected capacitive touch screen uses 2 perpendicular layers of conductive coating that form horizontally and vertically patterned tracks behind the top layer of the glass surface.
On touching, the mutual capacitance between vertical and horizontal patterned tracks changes. Each cell of the vertical and horizontal grid is scanned by the controller using a high-frequency signal. Hence identifies and as touch locations, it changes the mutual capacitance between the adjacent cells.
Surface Acoustic Wave
The surface acoustic wave relies on the sound waves. Hence, it has sound wave reflectors along its edges. There are two transducers placed at the two corners, and there are two receivers mounted at the opposite corners. The sound wave generated, travels parallel to the glass’s edges. Once the sound wave meets reflectors, the wave is transmitted to the receiver from the transducer. The point of touching is then detected when the drop in amplitude of the sound wave occurs.
Infrared Touch Screen
This type of touchscreen uses sensors and a light emitting diode that are embedded in the bezel around the display. It emits and detects the columns and rows of infrared light across the display’s surface. It creates a grid of infrared beams that are invisible and from the emitter on the opposite side of the display. The sensors or photodetectors identify touch when the plane of the grid is interrupted by the touch of a finger.
The technical screens manufacturer produces various types of touch screens which have a great impact on innovation and technology across the globe.